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
->height_fixed_p
= 0;
279 p
->last_cursor_off_p
= p
->cursor_off_p
= 0;
280 p
->left_margin_cols
= Qnil
;
281 p
->right_margin_cols
= Qnil
;
282 p
->left_fringe_width
= Qnil
;
283 p
->right_fringe_width
= Qnil
;
284 p
->fringes_outside_margins
= Qnil
;
285 p
->scroll_bar_width
= Qnil
;
286 p
->vertical_scroll_bar_type
= Qt
;
292 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
293 doc
: /* Return the window that the cursor now appears in and commands apply to. */)
296 return selected_window
;
299 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
300 doc
: /* Return the window used now for minibuffers.
301 If the optional argument FRAME is specified, return the minibuffer window
302 used by that frame. */)
307 frame
= selected_frame
;
308 CHECK_LIVE_FRAME (frame
);
309 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
312 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
313 doc
: /* Returns non-nil if WINDOW is a minibuffer window.
314 WINDOW defaults to the selected window. */)
318 struct window
*w
= decode_window (window
);
319 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
323 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
324 Spos_visible_in_window_p
, 0, 3, 0,
325 doc
: /* Return non-nil if position POS is currently on the frame in WINDOW.
326 Return nil if that position is scrolled vertically out of view.
327 If a character is only partially visible, nil is returned, unless the
328 optional argument PARTIALLY is non-nil.
329 If POS is only out of view because of horizontal scrolling, return non-nil.
330 POS defaults to point in WINDOW; WINDOW defaults to the selected window.
332 If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil,
333 return value is a list (X Y PARTIAL) where X and Y are the pixel coordinates
334 relative to the top left corner of the window. PARTIAL is nil if the character
335 after POS is fully visible; otherwise it is a cons (RTOP . RBOT) where RTOP
336 and RBOT are the number of pixels invisible at the top and bottom of the row. */)
337 (pos
, window
, partially
)
338 Lisp_Object pos
, window
, partially
;
340 register struct window
*w
;
342 register struct buffer
*buf
;
344 Lisp_Object in_window
= Qnil
;
345 int rtop
, rbot
, fully_p
= 1;
348 w
= decode_window (window
);
349 buf
= XBUFFER (w
->buffer
);
350 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
354 CHECK_NUMBER_COERCE_MARKER (pos
);
357 else if (w
== XWINDOW (selected_window
))
360 posint
= XMARKER (w
->pointm
)->charpos
;
362 /* If position is above window start or outside buffer boundaries,
363 or if window start is out of range, position is not visible. */
364 if (posint
>= CHARPOS (top
)
365 && posint
<= BUF_ZV (buf
)
366 && CHARPOS (top
) >= BUF_BEGV (buf
)
367 && CHARPOS (top
) <= BUF_ZV (buf
)
368 && pos_visible_p (w
, posint
, &x
, &y
, &rtop
, &rbot
, NILP (partially
))
369 && (fully_p
= !rtop
&& !rbot
, (!NILP (partially
) || fully_p
)))
372 if (!NILP (in_window
) && !NILP (partially
))
373 in_window
= Fcons (make_number (x
),
374 Fcons (make_number (y
),
375 Fcons ((fully_p
? Qnil
376 : Fcons (make_number (rtop
),
377 make_number (rbot
))),
383 static struct window
*
384 decode_window (window
)
385 register Lisp_Object window
;
388 return XWINDOW (selected_window
);
390 CHECK_LIVE_WINDOW (window
);
391 return XWINDOW (window
);
394 static struct window
*
395 decode_any_window (window
)
396 register Lisp_Object window
;
399 return XWINDOW (selected_window
);
401 CHECK_WINDOW (window
);
402 return XWINDOW (window
);
405 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
406 doc
: /* Return the buffer that WINDOW is displaying.
407 WINDOW defaults to the selected window. */)
411 return decode_window (window
)->buffer
;
414 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
415 doc
: /* Return the number of lines in WINDOW (including its mode line). */)
419 return decode_any_window (window
)->total_lines
;
422 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
423 doc
: /* Return the number of display columns in WINDOW.
424 This is the width that is usable columns available for text in WINDOW.
425 If you want to find out how many columns WINDOW takes up,
426 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */)
430 return make_number (window_box_text_cols (decode_any_window (window
)));
433 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
434 doc
: /* Return the number of columns by which WINDOW is scrolled from left margin. */)
438 return decode_window (window
)->hscroll
;
441 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
442 doc
: /* Set number of columns WINDOW is scrolled from left margin to NCOL.
443 Return NCOL. NCOL should be zero or positive.
445 Note that if `automatic-hscrolling' is non-nil, you cannot scroll the
446 window so that the location of point becomes invisible. */)
448 Lisp_Object window
, ncol
;
450 struct window
*w
= decode_window (window
);
454 hscroll
= max (0, XINT (ncol
));
456 /* Prevent redisplay shortcuts when changing the hscroll. */
457 if (XINT (w
->hscroll
) != hscroll
)
458 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
460 w
->hscroll
= make_number (hscroll
);
464 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
465 Swindow_redisplay_end_trigger
, 0, 1, 0,
466 doc
: /* Return WINDOW's redisplay end trigger value.
467 See `set-window-redisplay-end-trigger' for more information. */)
471 return decode_window (window
)->redisplay_end_trigger
;
474 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
475 Sset_window_redisplay_end_trigger
, 2, 2, 0,
476 doc
: /* Set WINDOW's redisplay end trigger value to VALUE.
477 VALUE should be a buffer position (typically a marker) or nil.
478 If it is a buffer position, then if redisplay in WINDOW reaches a position
479 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
480 with two arguments: WINDOW, and the end trigger value.
481 Afterwards the end-trigger value is reset to nil. */)
483 register Lisp_Object window
, value
;
485 register struct window
*w
;
487 w
= decode_window (window
);
488 w
->redisplay_end_trigger
= value
;
492 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
493 doc
: /* Return a list of the edge coordinates of WINDOW.
494 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
495 RIGHT is one more than the rightmost column occupied by WINDOW,
496 and BOTTOM is one more than the bottommost row occupied by WINDOW.
497 The edges include the space used by the window's scroll bar,
498 display margins, fringes, header line, and mode line, if it has them.
499 To get the edges of the actual text area, use `window-inside-edges'. */)
503 register struct window
*w
= decode_any_window (window
);
505 return Fcons (make_number (WINDOW_LEFT_EDGE_COL (w
)),
506 Fcons (make_number (WINDOW_TOP_EDGE_LINE (w
)),
507 Fcons (make_number (WINDOW_RIGHT_EDGE_COL (w
)),
508 Fcons (make_number (WINDOW_BOTTOM_EDGE_LINE (w
)),
512 DEFUN ("window-pixel-edges", Fwindow_pixel_edges
, Swindow_pixel_edges
, 0, 1, 0,
513 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
514 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
515 RIGHT is one more than the rightmost x position occupied by WINDOW,
516 and BOTTOM is one more than the bottommost y position occupied by WINDOW.
517 The pixel edges include the space used by the window's scroll bar,
518 display margins, fringes, header line, and mode line, if it has them.
519 To get the edges of the actual text area, use `window-inside-pixel-edges'. */)
523 register struct window
*w
= decode_any_window (window
);
525 return Fcons (make_number (WINDOW_LEFT_EDGE_X (w
)),
526 Fcons (make_number (WINDOW_TOP_EDGE_Y (w
)),
527 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w
)),
528 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w
)),
532 DEFUN ("window-inside-edges", Fwindow_inside_edges
, Swindow_inside_edges
, 0, 1, 0,
533 doc
: /* Return a list of the edge coordinates of WINDOW.
534 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
535 RIGHT is one more than the rightmost column used by text in WINDOW,
536 and BOTTOM is one more than the bottommost row used by text in WINDOW.
537 The inside edges do not include the space used by the window's scroll bar,
538 display margins, fringes, header line, and/or mode line. */)
542 register struct window
*w
= decode_any_window (window
);
544 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_COL (w
)
545 + WINDOW_LEFT_MARGIN_COLS (w
)
546 + WINDOW_LEFT_FRINGE_COLS (w
)),
547 make_number (WINDOW_TOP_EDGE_LINE (w
)
548 + WINDOW_HEADER_LINE_LINES (w
)),
549 make_number (WINDOW_BOX_RIGHT_EDGE_COL (w
)
550 - WINDOW_RIGHT_MARGIN_COLS (w
)
551 - WINDOW_RIGHT_FRINGE_COLS (w
)),
552 make_number (WINDOW_BOTTOM_EDGE_LINE (w
)
553 - WINDOW_MODE_LINE_LINES (w
)));
556 DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges
, Swindow_inside_pixel_edges
, 0, 1, 0,
557 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
558 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
559 RIGHT is one more than the rightmost x position used by text in WINDOW,
560 and BOTTOM is one more than the bottommost y position used by text in WINDOW.
561 The inside edges do not include the space used by the window's scroll bar,
562 display margins, fringes, header line, and/or mode line. */)
566 register struct window
*w
= decode_any_window (window
);
568 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w
)
569 + WINDOW_LEFT_MARGIN_WIDTH (w
)
570 + WINDOW_LEFT_FRINGE_WIDTH (w
)),
571 make_number (WINDOW_TOP_EDGE_Y (w
)
572 + WINDOW_HEADER_LINE_HEIGHT (w
)),
573 make_number (WINDOW_BOX_RIGHT_EDGE_X (w
)
574 - WINDOW_RIGHT_MARGIN_WIDTH (w
)
575 - WINDOW_RIGHT_FRINGE_WIDTH (w
)),
576 make_number (WINDOW_BOTTOM_EDGE_Y (w
)
577 - WINDOW_MODE_LINE_HEIGHT (w
)));
580 /* Test if the character at column *X, row *Y is within window W.
581 If it is not, return ON_NOTHING;
582 if it is in the window's text area,
583 set *x and *y to its location relative to the upper left corner
586 if it is on the window's modeline, return ON_MODE_LINE;
587 if it is on the border between the window and its right sibling,
588 return ON_VERTICAL_BORDER.
589 if it is on a scroll bar,
590 return ON_SCROLL_BAR.
591 if it is on the window's top line, return ON_HEADER_LINE;
592 if it is in left or right fringe of the window,
593 return ON_LEFT_FRINGE or ON_RIGHT_FRINGE, and convert *X and *Y
594 to window-relative coordinates;
595 if it is in the marginal area to the left/right of the window,
596 return ON_LEFT_MARGIN or ON_RIGHT_MARGIN, and convert *X and *Y
597 to window-relative coordinates.
599 X and Y are frame relative pixel coordinates. */
601 static enum window_part
602 coordinates_in_window (w
, x
, y
)
603 register struct window
*w
;
606 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
607 int left_x
, right_x
, top_y
, bottom_y
;
608 enum window_part part
;
609 int ux
= FRAME_COLUMN_WIDTH (f
);
610 int x0
= WINDOW_LEFT_EDGE_X (w
);
611 int x1
= WINDOW_RIGHT_EDGE_X (w
);
612 /* The width of the area where the vertical line can be dragged.
613 (Between mode lines for instance. */
614 int grabbable_width
= ux
;
615 int lmargin_width
, rmargin_width
, text_left
, text_right
;
617 /* In what's below, we subtract 1 when computing right_x because we
618 want the rightmost pixel, which is given by left_pixel+width-1. */
619 if (w
->pseudo_window_p
)
622 right_x
= WINDOW_TOTAL_WIDTH (w
) - 1;
623 top_y
= WINDOW_TOP_EDGE_Y (w
);
624 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
628 left_x
= WINDOW_BOX_LEFT_EDGE_X (w
);
629 right_x
= WINDOW_BOX_RIGHT_EDGE_X (w
) - 1;
630 top_y
= WINDOW_TOP_EDGE_Y (w
);
631 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
634 /* Outside any interesting row? */
635 if (*y
< top_y
|| *y
>= bottom_y
)
638 /* On the mode line or header line? If it's near the start of
639 the mode or header line of window that's has a horizontal
640 sibling, say it's on the vertical line. That's to be able
641 to resize windows horizontally in case we're using toolkit
644 if (WINDOW_WANTS_MODELINE_P (w
)
645 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
))
649 header_vertical_border_check
:
650 /* We're somewhere on the mode line. We consider the place
651 between mode lines of horizontally adjacent mode lines
652 as the vertical border. If scroll bars on the left,
653 return the right window. */
654 if (WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w
)
655 || WINDOW_RIGHTMOST_P (w
))
657 if (!WINDOW_LEFTMOST_P (w
) && abs (*x
- x0
) < grabbable_width
)
658 return ON_VERTICAL_BORDER
;
662 if (abs (*x
- x1
) < grabbable_width
)
663 return ON_VERTICAL_BORDER
;
666 if (*x
< x0
|| *x
>= x1
)
669 /* Convert X and Y to window relative coordinates.
670 Mode line starts at left edge of window. */
676 if (WINDOW_WANTS_HEADER_LINE_P (w
)
677 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
))
679 part
= ON_HEADER_LINE
;
680 goto header_vertical_border_check
;
683 if (*x
< x0
|| *x
>= x1
)
686 /* Outside any interesting column? */
687 if (*x
< left_x
|| *x
> right_x
)
688 return ON_SCROLL_BAR
;
690 lmargin_width
= window_box_width (w
, LEFT_MARGIN_AREA
);
691 rmargin_width
= window_box_width (w
, RIGHT_MARGIN_AREA
);
693 text_left
= window_box_left (w
, TEXT_AREA
);
694 text_right
= text_left
+ window_box_width (w
, TEXT_AREA
);
696 if (FRAME_WINDOW_P (f
))
698 if (!w
->pseudo_window_p
699 && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w
)
700 && !WINDOW_RIGHTMOST_P (w
)
701 && (abs (*x
- right_x
) < grabbable_width
))
702 return ON_VERTICAL_BORDER
;
706 /* Need to say "*x > right_x" rather than >=, since on character
707 terminals, the vertical line's x coordinate is right_x. */
708 if (!w
->pseudo_window_p
709 && !WINDOW_RIGHTMOST_P (w
)
710 && *x
> right_x
- ux
)
712 /* On the border on the right side of the window? Assume that
713 this area begins at RIGHT_X minus a canonical char width. */
714 return ON_VERTICAL_BORDER
;
720 if (lmargin_width
> 0
721 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
722 ? (*x
>= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
))
723 : (*x
< left_x
+ lmargin_width
)))
726 if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
727 *x
-= WINDOW_LEFT_FRINGE_WIDTH (w
);
729 return ON_LEFT_MARGIN
;
732 /* Convert X and Y to window-relative pixel coordinates. */
735 return ON_LEFT_FRINGE
;
738 if (*x
>= text_right
)
740 if (rmargin_width
> 0
741 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
742 ? (*x
< right_x
- WINDOW_RIGHT_FRINGE_WIDTH (w
))
743 : (*x
>= right_x
- rmargin_width
)))
746 if (!WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
747 *x
-= WINDOW_RIGHT_FRINGE_WIDTH (w
);
749 return ON_RIGHT_MARGIN
;
752 /* Convert X and Y to window-relative pixel coordinates. */
753 *x
-= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
);
755 return ON_RIGHT_FRINGE
;
758 /* Everything special ruled out - must be on text area */
759 *x
-= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
);
765 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
766 Scoordinates_in_window_p
, 2, 2, 0,
767 doc
: /* Return non-nil if COORDINATES are in WINDOW.
768 COORDINATES is a cons of the form (X . Y), X and Y being distances
769 measured in characters from the upper-left corner of the frame.
770 \(0 . 0) denotes the character in the upper left corner of the
772 If COORDINATES are in the text portion of WINDOW,
773 the coordinates relative to the window are returned.
774 If they are in the mode line of WINDOW, `mode-line' is returned.
775 If they are in the top mode line of WINDOW, `header-line' is returned.
776 If they are in the left fringe of WINDOW, `left-fringe' is returned.
777 If they are in the right fringe of WINDOW, `right-fringe' is returned.
778 If they are on the border between WINDOW and its right sibling,
779 `vertical-line' is returned.
780 If they are in the windows's left or right marginal areas, `left-margin'\n\
781 or `right-margin' is returned. */)
782 (coordinates
, window
)
783 register Lisp_Object coordinates
, window
;
790 CHECK_WINDOW (window
);
791 w
= XWINDOW (window
);
792 f
= XFRAME (w
->frame
);
793 CHECK_CONS (coordinates
);
794 lx
= Fcar (coordinates
);
795 ly
= Fcdr (coordinates
);
796 CHECK_NUMBER_OR_FLOAT (lx
);
797 CHECK_NUMBER_OR_FLOAT (ly
);
798 x
= FRAME_PIXEL_X_FROM_CANON_X (f
, lx
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
799 y
= FRAME_PIXEL_Y_FROM_CANON_Y (f
, ly
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
801 switch (coordinates_in_window (w
, &x
, &y
))
807 /* X and Y are now window relative pixel coordinates. Convert
808 them to canonical char units before returning them. */
809 return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f
, x
),
810 FRAME_CANON_Y_FROM_PIXEL_Y (f
, y
));
815 case ON_VERTICAL_BORDER
:
816 return Qvertical_line
;
824 case ON_RIGHT_FRINGE
:
825 return Qright_fringe
;
830 case ON_RIGHT_MARGIN
:
831 return Qright_margin
;
834 /* Historically we are supposed to return nil in this case. */
843 /* Callback for foreach_window, used in window_from_coordinates.
844 Check if window W contains coordinates specified by USER_DATA which
845 is actually a pointer to a struct check_window_data CW.
847 Check if window W contains coordinates *CW->x and *CW->y. If it
848 does, return W in *CW->window, as Lisp_Object, and return in
849 *CW->part the part of the window under coordinates *X,*Y. Return
850 zero from this function to stop iterating over windows. */
852 struct check_window_data
856 enum window_part
*part
;
860 check_window_containing (w
, user_data
)
864 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
865 enum window_part found
;
868 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
869 if (found
!= ON_NOTHING
)
872 XSETWINDOW (*cw
->window
, w
);
880 /* Find the window containing frame-relative pixel position X/Y and
881 return it as a Lisp_Object.
883 If X, Y is on one of the window's special `window_part' elements,
884 set *PART to the id of that element, and return X and Y converted
885 to window relative coordinates in WX and WY.
887 If there is no window under X, Y return nil and leave *PART
888 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
890 This function was previously implemented with a loop cycling over
891 windows with Fnext_window, and starting with the frame's selected
892 window. It turned out that this doesn't work with an
893 implementation of next_window using Vwindow_list, because
894 FRAME_SELECTED_WINDOW (F) is not always contained in the window
895 tree of F when this function is called asynchronously from
896 note_mouse_highlight. The original loop didn't terminate in this
900 window_from_coordinates (f
, x
, y
, part
, wx
, wy
, tool_bar_p
)
903 enum window_part
*part
;
908 struct check_window_data cw
;
909 enum window_part dummy
;
915 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
916 foreach_window (f
, check_window_containing
, &cw
);
918 /* If not found above, see if it's in the tool bar window, if a tool
922 && WINDOWP (f
->tool_bar_window
)
923 && WINDOW_TOTAL_LINES (XWINDOW (f
->tool_bar_window
)) > 0
924 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
)
928 window
= f
->tool_bar_window
;
937 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
938 doc
: /* Return window containing coordinates X and Y on FRAME.
939 If omitted, FRAME defaults to the currently selected frame.
940 The top left corner of the frame is considered to be row 0,
943 Lisp_Object x
, y
, frame
;
948 frame
= selected_frame
;
949 CHECK_LIVE_FRAME (frame
);
952 /* Check that arguments are integers or floats. */
953 CHECK_NUMBER_OR_FLOAT (x
);
954 CHECK_NUMBER_OR_FLOAT (y
);
956 return window_from_coordinates (f
,
957 (FRAME_PIXEL_X_FROM_CANON_X (f
, x
)
958 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
959 (FRAME_PIXEL_Y_FROM_CANON_Y (f
, y
)
960 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
964 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
965 doc
: /* Return current value of point in WINDOW.
966 For a nonselected window, this is the value point would have
967 if that window were selected.
969 Note that, when WINDOW is the selected window and its buffer
970 is also currently selected, the value returned is the same as (point).
971 It would be more strictly correct to return the `top-level' value
972 of point, outside of any save-excursion forms.
973 But that is hard to define. */)
977 register struct window
*w
= decode_window (window
);
979 if (w
== XWINDOW (selected_window
)
980 && current_buffer
== XBUFFER (w
->buffer
))
982 return Fmarker_position (w
->pointm
);
985 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
986 doc
: /* Return position at which display currently starts in WINDOW.
987 This is updated by redisplay or by calling `set-window-start'. */)
991 return Fmarker_position (decode_window (window
)->start
);
994 /* This is text temporarily removed from the doc string below.
996 This function returns nil if the position is not currently known.
997 That happens when redisplay is preempted and doesn't finish.
998 If in that case you want to compute where the end of the window would
999 have been if redisplay had finished, do this:
1001 (goto-char (window-start window))
1002 (vertical-motion (1- (window-height window)) window)
1005 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
1006 doc
: /* Return position at which display currently ends in WINDOW.
1007 This is updated by redisplay, when it runs to completion.
1008 Simply changing the buffer text or setting `window-start'
1009 does not update this value.
1010 Return nil if there is no recorded value. \(This can happen if the
1011 last redisplay of WINDOW was preempted, and did not finish.)
1012 If UPDATE is non-nil, compute the up-to-date position
1013 if it isn't already recorded. */)
1015 Lisp_Object window
, update
;
1018 struct window
*w
= decode_window (window
);
1024 #if 0 /* This change broke some things. We should make it later. */
1025 /* If we don't know the end position, return nil.
1026 The user can compute it with vertical-motion if he wants to.
1027 It would be nicer to do it automatically,
1028 but that's so slow that it would probably bother people. */
1029 if (NILP (w
->window_end_valid
))
1034 && ! (! NILP (w
->window_end_valid
)
1035 && XFASTINT (w
->last_modified
) >= MODIFF
))
1037 struct text_pos startp
;
1039 struct buffer
*old_buffer
= NULL
, *b
= XBUFFER (buf
);
1041 /* In case W->start is out of the range, use something
1042 reasonable. This situation occurred when loading a file with
1043 `-l' containing a call to `rmail' with subsequent other
1044 commands. At the end, W->start happened to be BEG, while
1045 rmail had already narrowed the buffer. */
1046 if (XMARKER (w
->start
)->charpos
< BEGV
)
1047 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
1048 else if (XMARKER (w
->start
)->charpos
> ZV
)
1049 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
1051 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
1053 /* Cannot use Fvertical_motion because that function doesn't
1054 cope with variable-height lines. */
1055 if (b
!= current_buffer
)
1057 old_buffer
= current_buffer
;
1058 set_buffer_internal (b
);
1061 start_display (&it
, w
, startp
);
1062 move_it_vertically (&it
, window_box_height (w
));
1063 if (it
.current_y
< it
.last_visible_y
)
1064 move_it_past_eol (&it
);
1065 value
= make_number (IT_CHARPOS (it
));
1068 set_buffer_internal (old_buffer
);
1071 XSETINT (value
, BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
1076 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
1077 doc
: /* Make point value in WINDOW be at position POS in WINDOW's buffer.
1080 Lisp_Object window
, pos
;
1082 register struct window
*w
= decode_window (window
);
1084 CHECK_NUMBER_COERCE_MARKER (pos
);
1085 if (w
== XWINDOW (selected_window
)
1086 && XBUFFER (w
->buffer
) == current_buffer
)
1089 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
1091 /* We have to make sure that redisplay updates the window to show
1092 the new value of point. */
1093 if (!EQ (window
, selected_window
))
1094 ++windows_or_buffers_changed
;
1099 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
1100 doc
: /* Make display in WINDOW start at position POS in WINDOW's buffer.
1102 Optional third arg NOFORCE non-nil inhibits next redisplay
1103 from overriding motion of point in order to display at this exact start. */)
1104 (window
, pos
, noforce
)
1105 Lisp_Object window
, pos
, noforce
;
1107 register struct window
*w
= decode_window (window
);
1109 CHECK_NUMBER_COERCE_MARKER (pos
);
1110 set_marker_restricted (w
->start
, pos
, w
->buffer
);
1111 /* this is not right, but much easier than doing what is right. */
1112 w
->start_at_line_beg
= Qnil
;
1114 w
->force_start
= Qt
;
1115 w
->update_mode_line
= Qt
;
1116 XSETFASTINT (w
->last_modified
, 0);
1117 XSETFASTINT (w
->last_overlay_modified
, 0);
1118 if (!EQ (window
, selected_window
))
1119 windows_or_buffers_changed
++;
1124 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
1126 doc
: /* Return WINDOW's dedicated object, usually t or nil.
1127 See also `set-window-dedicated-p'. */)
1131 return decode_window (window
)->dedicated
;
1134 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
1135 Sset_window_dedicated_p
, 2, 2, 0,
1136 doc
: /* Control whether WINDOW is dedicated to the buffer it displays.
1137 If it is dedicated, Emacs will not automatically change
1138 which buffer appears in it.
1139 The second argument is the new value for the dedication flag;
1140 non-nil means yes. */)
1142 Lisp_Object window
, arg
;
1144 register struct window
*w
= decode_window (window
);
1148 return w
->dedicated
;
1151 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1153 doc
: /* Return the display-table that WINDOW is using. */)
1157 return decode_window (window
)->display_table
;
1160 /* Get the display table for use on window W. This is either W's
1161 display table or W's buffer's display table. Ignore the specified
1162 tables if they are not valid; if no valid table is specified,
1165 struct Lisp_Char_Table
*
1166 window_display_table (w
)
1169 struct Lisp_Char_Table
*dp
= NULL
;
1171 if (DISP_TABLE_P (w
->display_table
))
1172 dp
= XCHAR_TABLE (w
->display_table
);
1173 else if (BUFFERP (w
->buffer
))
1175 struct buffer
*b
= XBUFFER (w
->buffer
);
1177 if (DISP_TABLE_P (b
->display_table
))
1178 dp
= XCHAR_TABLE (b
->display_table
);
1179 else if (DISP_TABLE_P (Vstandard_display_table
))
1180 dp
= XCHAR_TABLE (Vstandard_display_table
);
1186 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1187 doc
: /* Set WINDOW's display-table to TABLE. */)
1189 register Lisp_Object window
, table
;
1191 register struct window
*w
;
1193 w
= decode_window (window
);
1194 w
->display_table
= table
;
1198 /* Record info on buffer window w is displaying
1199 when it is about to cease to display that buffer. */
1202 register struct window
*w
;
1209 if (b
!= XMARKER (w
->pointm
)->buffer
)
1213 if (w
== XWINDOW (selected_window
)
1214 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1215 /* Do this except when the selected window's buffer
1216 is being removed from some other window. */
1218 /* last_window_start records the start position that this buffer
1219 had in the last window to be disconnected from it.
1220 Now that this statement is unconditional,
1221 it is possible for the buffer to be displayed in the
1222 selected window, while last_window_start reflects another
1223 window which was recently showing the same buffer.
1224 Some people might say that might be a good thing. Let's see. */
1225 b
->last_window_start
= marker_position (w
->start
);
1227 /* Point in the selected window's buffer
1228 is actually stored in that buffer, and the window's pointm isn't used.
1229 So don't clobber point in that buffer. */
1230 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1231 /* This line helps to fix Horsley's testbug.el bug. */
1232 && !(WINDOWP (b
->last_selected_window
)
1233 && w
!= XWINDOW (b
->last_selected_window
)
1234 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1235 temp_set_point_both (b
,
1236 clip_to_bounds (BUF_BEGV (b
),
1237 XMARKER (w
->pointm
)->charpos
,
1239 clip_to_bounds (BUF_BEGV_BYTE (b
),
1240 marker_byte_position (w
->pointm
),
1243 if (WINDOWP (b
->last_selected_window
)
1244 && w
== XWINDOW (b
->last_selected_window
))
1245 b
->last_selected_window
= Qnil
;
1248 /* Put replacement into the window structure in place of old. */
1250 replace_window (old
, replacement
)
1251 Lisp_Object old
, replacement
;
1253 register Lisp_Object tem
;
1254 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1256 /* If OLD is its frame's root_window, then replacement is the new
1257 root_window for that frame. */
1259 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1260 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1262 p
->left_col
= o
->left_col
;
1263 p
->top_line
= o
->top_line
;
1264 p
->total_cols
= o
->total_cols
;
1265 p
->total_lines
= o
->total_lines
;
1266 p
->desired_matrix
= p
->current_matrix
= 0;
1268 bzero (&p
->cursor
, sizeof (p
->cursor
));
1269 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1270 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1271 p
->phys_cursor_type
= -1;
1272 p
->phys_cursor_width
= -1;
1273 p
->must_be_updated_p
= 0;
1274 p
->pseudo_window_p
= 0;
1275 XSETFASTINT (p
->window_end_vpos
, 0);
1276 XSETFASTINT (p
->window_end_pos
, 0);
1277 p
->window_end_valid
= Qnil
;
1278 p
->frozen_window_start_p
= 0;
1279 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
1281 p
->next
= tem
= o
->next
;
1283 XWINDOW (tem
)->prev
= replacement
;
1285 p
->prev
= tem
= o
->prev
;
1287 XWINDOW (tem
)->next
= replacement
;
1289 p
->parent
= tem
= o
->parent
;
1292 if (EQ (XWINDOW (tem
)->vchild
, old
))
1293 XWINDOW (tem
)->vchild
= replacement
;
1294 if (EQ (XWINDOW (tem
)->hchild
, old
))
1295 XWINDOW (tem
)->hchild
= replacement
;
1298 /*** Here, if replacement is a vertical combination
1299 and so is its new parent, we should make replacement's
1300 children be children of that parent instead. ***/
1303 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1304 doc
: /* Remove WINDOW from the display. Default is selected window. */)
1306 register Lisp_Object window
;
1308 delete_window (window
);
1310 if (! NILP (Vwindow_configuration_change_hook
)
1311 && ! NILP (Vrun_hooks
))
1312 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1318 delete_window (window
)
1319 register Lisp_Object window
;
1321 register Lisp_Object tem
, parent
, sib
;
1322 register struct window
*p
;
1323 register struct window
*par
;
1326 /* Because this function is called by other C code on non-leaf
1327 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1328 so we can't decode_window here. */
1330 window
= selected_window
;
1332 CHECK_WINDOW (window
);
1333 p
= XWINDOW (window
);
1335 /* It's okay to delete an already-deleted window. */
1336 if (NILP (p
->buffer
)
1338 && NILP (p
->vchild
))
1343 error ("Attempt to delete minibuffer or sole ordinary window");
1344 par
= XWINDOW (parent
);
1346 windows_or_buffers_changed
++;
1347 Vwindow_list
= Qnil
;
1348 f
= XFRAME (WINDOW_FRAME (p
));
1349 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1351 /* Are we trying to delete any frame's selected window? */
1353 Lisp_Object swindow
, pwindow
;
1355 /* See if the frame's selected window is either WINDOW
1356 or any subwindow of it, by finding all that window's parents
1357 and comparing each one with WINDOW. */
1358 swindow
= FRAME_SELECTED_WINDOW (f
);
1363 while (!NILP (pwindow
))
1365 if (EQ (window
, pwindow
))
1367 pwindow
= XWINDOW (pwindow
)->parent
;
1370 /* If the window being deleted is not a parent of SWINDOW,
1371 then SWINDOW is ok as the new selected window. */
1372 if (!EQ (window
, pwindow
))
1374 /* Otherwise, try another window for SWINDOW. */
1375 swindow
= Fnext_window (swindow
, Qlambda
, Qnil
);;
1377 /* If we get back to the frame's selected window,
1378 it means there was no acceptable alternative,
1379 so we cannot delete. */
1380 if (EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1381 error ("Cannot delete window");
1384 /* If we need to change SWINDOW, do it. */
1385 if (! EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1387 /* If we're about to delete the selected window on the
1388 selected frame, then we should use Fselect_window to select
1389 the new window. On the other hand, if we're about to
1390 delete the selected window on any other frame, we shouldn't do
1391 anything but set the frame's selected_window slot. */
1392 if (EQ (FRAME_SELECTED_WINDOW (f
), selected_window
))
1393 Fselect_window (swindow
, Qnil
);
1395 FRAME_SELECTED_WINDOW (f
) = swindow
;
1400 /* tem is null for dummy parent windows
1401 (which have inferiors but not any contents themselves) */
1405 unchain_marker (XMARKER (p
->pointm
));
1406 unchain_marker (XMARKER (p
->start
));
1409 /* Free window glyph matrices. It is sure that they are allocated
1410 again when ADJUST_GLYPHS is called. Block input so that expose
1411 events and other events that access glyph matrices are not
1412 processed while we are changing them. */
1414 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1418 XWINDOW (tem
)->prev
= p
->prev
;
1422 XWINDOW (tem
)->next
= p
->next
;
1424 if (EQ (window
, par
->hchild
))
1425 par
->hchild
= p
->next
;
1426 if (EQ (window
, par
->vchild
))
1427 par
->vchild
= p
->next
;
1429 /* Find one of our siblings to give our space to. */
1433 /* If p gives its space to its next sibling, that sibling needs
1434 to have its top/left side pulled back to where p's is.
1435 set_window_{height,width} will re-position the sibling's
1438 XWINDOW (sib
)->top_line
= p
->top_line
;
1439 XWINDOW (sib
)->left_col
= p
->left_col
;
1442 /* Stretch that sibling. */
1443 if (!NILP (par
->vchild
))
1444 set_window_height (sib
,
1445 XFASTINT (XWINDOW (sib
)->total_lines
) + XFASTINT (p
->total_lines
),
1447 if (!NILP (par
->hchild
))
1448 set_window_width (sib
,
1449 XFASTINT (XWINDOW (sib
)->total_cols
) + XFASTINT (p
->total_cols
),
1452 /* If parent now has only one child,
1453 put the child into the parent's place. */
1457 if (NILP (XWINDOW (tem
)->next
)) {
1458 replace_window (parent
, tem
);
1459 par
= XWINDOW (tem
);
1462 /* Since we may be deleting combination windows, we must make sure that
1463 not only p but all its children have been marked as deleted. */
1464 if (! NILP (p
->hchild
))
1465 delete_all_subwindows (XWINDOW (p
->hchild
));
1466 else if (! NILP (p
->vchild
))
1467 delete_all_subwindows (XWINDOW (p
->vchild
));
1469 /* Mark this window as deleted. */
1470 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1472 if (! NILP (par
->parent
))
1473 par
= XWINDOW (par
->parent
);
1475 /* Check if we have a v/hchild with a v/hchild. In that case remove
1478 if (! NILP (par
->vchild
) && ! NILP (XWINDOW (par
->vchild
)->vchild
))
1480 p
= XWINDOW (par
->vchild
);
1481 par
->vchild
= p
->vchild
;
1484 else if (! NILP (par
->hchild
) && ! NILP (XWINDOW (par
->hchild
)->hchild
))
1486 p
= XWINDOW (par
->hchild
);
1487 par
->hchild
= p
->hchild
;
1495 while (! NILP (tem
)) {
1496 XWINDOW (tem
)->parent
= p
->parent
;
1497 if (NILP (XWINDOW (tem
)->next
))
1499 tem
= XWINDOW (tem
)->next
;
1502 /* The next of the v/hchild we are removing is now the next of the
1503 last child for the v/hchild:
1504 Before v/hchild -> v/hchild -> next1 -> next2
1507 After: v/hchild -> next1 -> next2 -> next3
1509 XWINDOW (tem
)->next
= p
->next
;
1510 if (! NILP (p
->next
))
1511 XWINDOW (p
->next
)->prev
= tem
;
1513 p
->next
= p
->prev
= p
->vchild
= p
->hchild
= p
->buffer
= Qnil
;
1517 /* Adjust glyph matrices. */
1524 /***********************************************************************
1526 ***********************************************************************/
1528 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1529 pointer. This is a callback function for foreach_window, used in
1530 function window_list. */
1533 add_window_to_list (w
, user_data
)
1537 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1539 XSETWINDOW (window
, w
);
1540 *list
= Fcons (window
, *list
);
1545 /* Return a list of all windows, for use by next_window. If
1546 Vwindow_list is a list, return that list. Otherwise, build a new
1547 list, cache it in Vwindow_list, and return that. */
1552 if (!CONSP (Vwindow_list
))
1556 Vwindow_list
= Qnil
;
1557 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1559 Lisp_Object args
[2];
1561 /* We are visiting windows in canonical order, and add
1562 new windows at the front of args[1], which means we
1563 have to reverse this list at the end. */
1565 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1566 args
[0] = Vwindow_list
;
1567 args
[1] = Fnreverse (args
[1]);
1568 Vwindow_list
= Fnconc (2, args
);
1572 return Vwindow_list
;
1576 /* Value is non-zero if WINDOW satisfies the constraints given by
1577 OWINDOW, MINIBUF and ALL_FRAMES.
1579 MINIBUF t means WINDOW may be minibuffer windows.
1580 `lambda' means WINDOW may not be a minibuffer window.
1581 a window means a specific minibuffer window
1583 ALL_FRAMES t means search all frames,
1584 nil means search just current frame,
1585 `visible' means search just visible frames,
1586 0 means search visible and iconified frames,
1587 a window means search the frame that window belongs to,
1588 a frame means consider windows on that frame, only. */
1591 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1592 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1594 struct window
*w
= XWINDOW (window
);
1595 struct frame
*f
= XFRAME (w
->frame
);
1596 int candidate_p
= 1;
1598 if (!BUFFERP (w
->buffer
))
1600 else if (MINI_WINDOW_P (w
)
1601 && (EQ (minibuf
, Qlambda
)
1602 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1604 /* If MINIBUF is `lambda' don't consider any mini-windows.
1605 If it is a window, consider only that one. */
1608 else if (EQ (all_frames
, Qt
))
1610 else if (NILP (all_frames
))
1612 xassert (WINDOWP (owindow
));
1613 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1615 else if (EQ (all_frames
, Qvisible
))
1617 FRAME_SAMPLE_VISIBILITY (f
);
1618 candidate_p
= FRAME_VISIBLE_P (f
);
1620 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1622 FRAME_SAMPLE_VISIBILITY (f
);
1623 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1625 else if (WINDOWP (all_frames
))
1626 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1627 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1628 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1629 else if (FRAMEP (all_frames
))
1630 candidate_p
= EQ (all_frames
, w
->frame
);
1636 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1637 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1641 decode_next_window_args (window
, minibuf
, all_frames
)
1642 Lisp_Object
*window
, *minibuf
, *all_frames
;
1645 *window
= selected_window
;
1647 CHECK_LIVE_WINDOW (*window
);
1649 /* MINIBUF nil may or may not include minibuffers. Decide if it
1651 if (NILP (*minibuf
))
1652 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1653 else if (!EQ (*minibuf
, Qt
))
1656 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1657 => count none of them, or a specific minibuffer window (the
1658 active one) to count. */
1660 /* ALL_FRAMES nil doesn't specify which frames to include. */
1661 if (NILP (*all_frames
))
1662 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1663 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1665 else if (EQ (*all_frames
, Qvisible
))
1667 else if (EQ (*all_frames
, make_number (0)))
1669 else if (FRAMEP (*all_frames
))
1671 else if (!EQ (*all_frames
, Qt
))
1674 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1675 search just current frame, `visible' meaning search just visible
1676 frames, 0 meaning search visible and iconified frames, or a
1677 window, meaning search the frame that window belongs to, or a
1678 frame, meaning consider windows on that frame, only. */
1682 /* Return the next or previous window of WINDOW in canonical ordering
1683 of windows. NEXT_P non-zero means return the next window. See the
1684 documentation string of next-window for the meaning of MINIBUF and
1688 next_window (window
, minibuf
, all_frames
, next_p
)
1689 Lisp_Object window
, minibuf
, all_frames
;
1692 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1694 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1695 return the first window on the frame. */
1696 if (FRAMEP (all_frames
)
1697 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1698 return Fframe_first_window (all_frames
);
1704 /* Find WINDOW in the list of all windows. */
1705 list
= Fmemq (window
, window_list ());
1707 /* Scan forward from WINDOW to the end of the window list. */
1709 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1710 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1713 /* Scan from the start of the window list up to WINDOW. */
1715 for (list
= Vwindow_list
;
1716 CONSP (list
) && !EQ (XCAR (list
), window
);
1718 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1722 window
= XCAR (list
);
1726 Lisp_Object candidate
, list
;
1728 /* Scan through the list of windows for candidates. If there are
1729 candidate windows in front of WINDOW, the last one of these
1730 is the one we want. If there are candidates following WINDOW
1731 in the list, again the last one of these is the one we want. */
1733 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1735 if (EQ (XCAR (list
), window
))
1737 if (WINDOWP (candidate
))
1740 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1742 candidate
= XCAR (list
);
1745 if (WINDOWP (candidate
))
1753 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1754 doc
: /* Return next window after WINDOW in canonical ordering of windows.
1755 If omitted, WINDOW defaults to the selected window.
1757 Optional second arg MINIBUF t means count the minibuffer window even
1758 if not active. MINIBUF nil or omitted means count the minibuffer iff
1759 it is active. MINIBUF neither t nor nil means not to count the
1760 minibuffer even if it is active.
1762 Several frames may share a single minibuffer; if the minibuffer
1763 counts, all windows on all frames that share that minibuffer count
1764 too. Therefore, `next-window' can be used to iterate through the
1765 set of windows even when the minibuffer is on another frame. If the
1766 minibuffer does not count, only windows from WINDOW's frame count.
1768 Optional third arg ALL-FRAMES t means include windows on all frames.
1769 ALL-FRAMES nil or omitted means cycle within the frames as specified
1770 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1771 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1772 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1773 Anything else means restrict to WINDOW's frame.
1775 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1776 `next-window' to iterate through the entire cycle of acceptable
1777 windows, eventually ending up back at the window you started with.
1778 `previous-window' traverses the same cycle, in the reverse order. */)
1779 (window
, minibuf
, all_frames
)
1780 Lisp_Object window
, minibuf
, all_frames
;
1782 return next_window (window
, minibuf
, all_frames
, 1);
1786 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1787 doc
: /* Return the window preceding WINDOW in canonical ordering of windows.
1788 If omitted, WINDOW defaults to the selected window.
1790 Optional second arg MINIBUF t means count the minibuffer window even
1791 if not active. MINIBUF nil or omitted means count the minibuffer iff
1792 it is active. MINIBUF neither t nor nil means not to count the
1793 minibuffer even if it is active.
1795 Several frames may share a single minibuffer; if the minibuffer
1796 counts, all windows on all frames that share that minibuffer count
1797 too. Therefore, `previous-window' can be used to iterate through
1798 the set of windows even when the minibuffer is on another frame. If
1799 the minibuffer does not count, only windows from WINDOW's frame count
1801 Optional third arg ALL-FRAMES t means include windows on all frames.
1802 ALL-FRAMES nil or omitted means cycle within the frames as specified
1803 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1804 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1805 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1806 Anything else means restrict to WINDOW's frame.
1808 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1809 `previous-window' to iterate through the entire cycle of acceptable
1810 windows, eventually ending up back at the window you started with.
1811 `next-window' traverses the same cycle, in the reverse order. */)
1812 (window
, minibuf
, all_frames
)
1813 Lisp_Object window
, minibuf
, all_frames
;
1815 return next_window (window
, minibuf
, all_frames
, 0);
1819 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1820 doc
: /* Select the ARG'th different window on this frame.
1821 All windows on current frame are arranged in a cyclic order.
1822 This command selects the window ARG steps away in that order.
1823 A negative ARG moves in the opposite order. The optional second
1824 argument ALL_FRAMES has the same meaning as in `next-window', which see. */)
1826 Lisp_Object arg
, all_frames
;
1832 window
= selected_window
;
1834 for (i
= XINT (arg
); i
> 0; --i
)
1835 window
= Fnext_window (window
, Qnil
, all_frames
);
1837 window
= Fprevious_window (window
, Qnil
, all_frames
);
1839 Fselect_window (window
, Qnil
);
1844 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1845 doc
: /* Return a list of windows on FRAME, starting with WINDOW.
1846 FRAME nil or omitted means use the selected frame.
1847 WINDOW nil or omitted means use the selected window.
1848 MINIBUF t means include the minibuffer window, even if it isn't active.
1849 MINIBUF nil or omitted means include the minibuffer window only
1851 MINIBUF neither nil nor t means never include the minibuffer window. */)
1852 (frame
, minibuf
, window
)
1853 Lisp_Object frame
, minibuf
, window
;
1856 window
= selected_window
;
1858 frame
= selected_frame
;
1860 if (!EQ (frame
, XWINDOW (window
)->frame
))
1861 error ("Window is on a different frame");
1863 return window_list_1 (window
, minibuf
, frame
);
1867 /* Return a list of windows in canonical ordering. Arguments are like
1868 for `next-window'. */
1871 window_list_1 (window
, minibuf
, all_frames
)
1872 Lisp_Object window
, minibuf
, all_frames
;
1874 Lisp_Object tail
, list
, rest
;
1876 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1879 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1880 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1881 list
= Fcons (XCAR (tail
), list
);
1883 /* Rotate the list to start with WINDOW. */
1884 list
= Fnreverse (list
);
1885 rest
= Fmemq (window
, list
);
1886 if (!NILP (rest
) && !EQ (rest
, list
))
1888 for (tail
= list
; !EQ (XCDR (tail
), rest
); tail
= XCDR (tail
))
1890 XSETCDR (tail
, Qnil
);
1891 list
= nconc2 (rest
, list
);
1898 /* Look at all windows, performing an operation specified by TYPE
1900 If FRAMES is Qt, look at all frames;
1901 Qnil, look at just the selected frame;
1902 Qvisible, look at visible frames;
1903 a frame, just look at windows on that frame.
1904 If MINI is non-zero, perform the operation on minibuffer windows too. */
1909 GET_BUFFER_WINDOW
, /* Arg is buffer */
1910 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1911 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1912 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1914 UNSHOW_BUFFER
, /* Arg is buffer */
1915 REDISPLAY_BUFFER_WINDOWS
, /* Arg is buffer */
1920 window_loop (type
, obj
, mini
, frames
)
1921 enum window_loop type
;
1922 Lisp_Object obj
, frames
;
1925 Lisp_Object window
, windows
, best_window
, frame_arg
;
1927 struct gcpro gcpro1
;
1929 /* If we're only looping through windows on a particular frame,
1930 frame points to that frame. If we're looping through windows
1931 on all frames, frame is 0. */
1932 if (FRAMEP (frames
))
1933 f
= XFRAME (frames
);
1934 else if (NILP (frames
))
1935 f
= SELECTED_FRAME ();
1940 frame_arg
= Qlambda
;
1941 else if (EQ (frames
, make_number (0)))
1943 else if (EQ (frames
, Qvisible
))
1948 /* frame_arg is Qlambda to stick to one frame,
1949 Qvisible to consider all visible frames,
1952 /* Pick a window to start with. */
1956 window
= FRAME_SELECTED_WINDOW (f
);
1958 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1960 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1964 for (; CONSP (windows
); windows
= CDR (windows
))
1968 window
= XCAR (windows
);
1969 w
= XWINDOW (window
);
1971 /* Note that we do not pay attention here to whether the frame
1972 is visible, since Fwindow_list skips non-visible frames if
1973 that is desired, under the control of frame_arg. */
1974 if (!MINI_WINDOW_P (w
)
1975 /* For UNSHOW_BUFFER, we must always consider all windows. */
1976 || type
== UNSHOW_BUFFER
1977 || (mini
&& minibuf_level
> 0))
1980 case GET_BUFFER_WINDOW
:
1981 if (EQ (w
->buffer
, obj
)
1982 /* Don't find any minibuffer window
1983 except the one that is currently in use. */
1984 && (MINI_WINDOW_P (w
)
1985 ? EQ (window
, minibuf_window
)
1988 if (NILP (best_window
))
1989 best_window
= window
;
1990 else if (EQ (window
, selected_window
))
1991 /* For compatibility with 20.x, prefer to return
1993 best_window
= window
;
1997 case GET_LRU_WINDOW
:
1998 /* t as arg means consider only full-width windows */
1999 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
2001 /* Ignore dedicated windows and minibuffers. */
2002 if (MINI_WINDOW_P (w
) || EQ (w
->dedicated
, Qt
))
2004 if (NILP (best_window
)
2005 || (XFASTINT (XWINDOW (best_window
)->use_time
)
2006 > XFASTINT (w
->use_time
)))
2007 best_window
= window
;
2010 case DELETE_OTHER_WINDOWS
:
2011 if (!EQ (window
, obj
))
2012 Fdelete_window (window
);
2015 case DELETE_BUFFER_WINDOWS
:
2016 if (EQ (w
->buffer
, obj
))
2018 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
2020 /* If this window is dedicated, and in a frame of its own,
2022 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2023 && !NILP (w
->dedicated
)
2024 && other_visible_frames (f
))
2026 /* Skip the other windows on this frame.
2027 There might be one, the minibuffer! */
2028 while (CONSP (XCDR (windows
))
2029 && EQ (XWINDOW (XCAR (windows
))->frame
,
2030 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2031 windows
= XCDR (windows
);
2033 /* Now we can safely delete the frame. */
2034 Fdelete_frame (w
->frame
, Qnil
);
2036 else if (NILP (w
->parent
))
2038 /* If we're deleting the buffer displayed in the
2039 only window on the frame, find a new buffer to
2042 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2043 Fset_window_buffer (window
, buffer
, Qnil
);
2044 if (EQ (window
, selected_window
))
2045 Fset_buffer (w
->buffer
);
2048 Fdelete_window (window
);
2052 case GET_LARGEST_WINDOW
:
2054 /* Ignore dedicated windows and minibuffers. */
2055 if (MINI_WINDOW_P (w
) || EQ (w
->dedicated
, Qt
))
2058 if (NILP (best_window
))
2059 best_window
= window
;
2062 struct window
*b
= XWINDOW (best_window
);
2063 if (XFASTINT (w
->total_lines
) * XFASTINT (w
->total_cols
)
2064 > XFASTINT (b
->total_lines
) * XFASTINT (b
->total_cols
))
2065 best_window
= window
;
2071 if (EQ (w
->buffer
, obj
))
2074 struct frame
*f
= XFRAME (w
->frame
);
2076 /* Find another buffer to show in this window. */
2077 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2079 /* If this window is dedicated, and in a frame of its own,
2081 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2082 && !NILP (w
->dedicated
)
2083 && other_visible_frames (f
))
2085 /* Skip the other windows on this frame.
2086 There might be one, the minibuffer! */
2087 while (CONSP (XCDR (windows
))
2088 && EQ (XWINDOW (XCAR (windows
))->frame
,
2089 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2090 windows
= XCDR (windows
);
2092 /* Now we can safely delete the frame. */
2093 Fdelete_frame (w
->frame
, Qnil
);
2095 else if (!NILP (w
->dedicated
) && !NILP (w
->parent
))
2098 XSETWINDOW (window
, w
);
2099 /* If this window is dedicated and not the only window
2100 in its frame, then kill it. */
2101 Fdelete_window (window
);
2105 /* Otherwise show a different buffer in the window. */
2106 w
->dedicated
= Qnil
;
2107 Fset_window_buffer (window
, buffer
, Qnil
);
2108 if (EQ (window
, selected_window
))
2109 Fset_buffer (w
->buffer
);
2114 case REDISPLAY_BUFFER_WINDOWS
:
2115 if (EQ (w
->buffer
, obj
))
2117 mark_window_display_accurate (window
, 0);
2118 w
->update_mode_line
= Qt
;
2119 XBUFFER (obj
)->prevent_redisplay_optimizations_p
= 1;
2120 ++update_mode_lines
;
2121 best_window
= window
;
2125 /* Check for a window that has a killed buffer. */
2126 case CHECK_ALL_WINDOWS
:
2127 if (! NILP (w
->buffer
)
2128 && NILP (XBUFFER (w
->buffer
)->name
))
2132 case WINDOW_LOOP_UNUSED
:
2141 /* Used for debugging. Abort if any window has a dead buffer. */
2144 check_all_windows ()
2146 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
2149 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
2150 doc
: /* Return the window least recently selected or used for display.
2151 Return a full-width window if possible.
2152 A minibuffer window is never a candidate.
2153 A dedicated window is never a candidate, so if all windows are dedicated,
2155 If optional argument FRAME is `visible', search all visible frames.
2156 If FRAME is 0, search all visible and iconified frames.
2157 If FRAME is t, search all frames.
2158 If FRAME is nil, search only the selected frame.
2159 If FRAME is a frame, search only that frame. */)
2163 register Lisp_Object w
;
2164 /* First try for a window that is full-width */
2165 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
2166 if (!NILP (w
) && !EQ (w
, selected_window
))
2168 /* If none of them, try the rest */
2169 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
2172 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
2173 doc
: /* Return the largest window in area.
2174 A minibuffer window is never a candidate.
2175 A dedicated window is never a candidate, so if all windows are dedicated,
2177 If optional argument FRAME is `visible', search all visible frames.
2178 If FRAME is 0, search all visible and iconified frames.
2179 If FRAME is t, search all frames.
2180 If FRAME is nil, search only the selected frame.
2181 If FRAME is a frame, search only that frame. */)
2185 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
2189 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
2190 doc
: /* Return a window currently displaying BUFFER, or nil if none.
2191 BUFFER can be a buffer or a buffer name.
2192 If optional argument FRAME is `visible', search all visible frames.
2193 If optional argument FRAME is 0, search all visible and iconified frames.
2194 If FRAME is t, search all frames.
2195 If FRAME is nil, search only the selected frame.
2196 If FRAME is a frame, search only that frame. */)
2198 Lisp_Object buffer
, frame
;
2200 buffer
= Fget_buffer (buffer
);
2201 if (BUFFERP (buffer
))
2202 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
2207 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
2209 doc
: /* Make WINDOW (or the selected window) fill its frame.
2210 Only the frame WINDOW is on is affected.
2211 This function tries to reduce display jumps
2212 by keeping the text previously visible in WINDOW
2213 in the same place on the frame. Doing this depends on
2214 the value of (window-start WINDOW), so if calling this function
2215 in a program gives strange scrolling, make sure the window-start
2216 value is reasonable when this function is called. */)
2225 window
= selected_window
;
2227 CHECK_LIVE_WINDOW (window
);
2228 w
= XWINDOW (window
);
2230 startpos
= marker_position (w
->start
);
2231 top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2233 if (MINI_WINDOW_P (w
) && top
> 0)
2234 error ("Can't expand minibuffer to full frame");
2236 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2238 /* Try to minimize scrolling, by setting the window start to the point
2239 will cause the text at the old window start to be at the same place
2240 on the frame. But don't try to do this if the window start is
2241 outside the visible portion (as might happen when the display is
2242 not current, due to typeahead). */
2243 new_top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2245 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2246 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2248 struct position pos
;
2249 struct buffer
*obuf
= current_buffer
;
2251 Fset_buffer (w
->buffer
);
2252 /* This computation used to temporarily move point, but that can
2253 have unwanted side effects due to text properties. */
2254 pos
= *vmotion (startpos
, -top
, w
);
2256 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2257 w
->window_end_valid
= Qnil
;
2258 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2259 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2261 /* We need to do this, so that the window-scroll-functions
2263 w
->optional_new_start
= Qt
;
2265 set_buffer_internal (obuf
);
2271 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2272 1, 2, "bDelete windows on (buffer): ",
2273 doc
: /* Delete all windows showing BUFFER.
2274 BUFFER must be a buffer or the name of an existing buffer.
2275 Optional second argument FRAME controls which frames are affected.
2276 If optional argument FRAME is `visible', search all visible frames.
2277 If FRAME is 0, search all visible and iconified frames.
2278 If FRAME is nil, search all frames.
2279 If FRAME is t, search only the selected frame.
2280 If FRAME is a frame, search only that frame. */)
2282 Lisp_Object buffer
, frame
;
2284 /* FRAME uses t and nil to mean the opposite of what window_loop
2288 else if (EQ (frame
, Qt
))
2293 buffer
= Fget_buffer (buffer
);
2294 CHECK_BUFFER (buffer
);
2295 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2301 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2302 Sreplace_buffer_in_windows
,
2303 1, 1, "bReplace buffer in windows: ",
2304 doc
: /* Replace BUFFER with some other buffer in all windows showing it.
2305 BUFFER may be a buffer or the name of an existing buffer. */)
2311 buffer
= Fget_buffer (buffer
);
2312 CHECK_BUFFER (buffer
);
2313 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2318 /* Replace BUFFER with some other buffer in all windows
2319 of all frames, even those on other keyboards. */
2322 replace_buffer_in_all_windows (buffer
)
2326 Lisp_Object tail
, frame
;
2328 /* A single call to window_loop won't do the job
2329 because it only considers frames on the current keyboard.
2330 So loop manually over frames, and handle each one. */
2331 FOR_EACH_FRAME (tail
, frame
)
2332 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2334 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2338 /* Set the height of WINDOW and all its inferiors. */
2340 /* The smallest acceptable dimensions for a window. Anything smaller
2341 might crash Emacs. */
2343 #define MIN_SAFE_WINDOW_WIDTH (2)
2344 #define MIN_SAFE_WINDOW_HEIGHT (1)
2346 /* Make sure that window_min_height and window_min_width are
2347 not too small; if they are, set them to safe minima. */
2350 check_min_window_sizes ()
2352 /* Smaller values might permit a crash. */
2353 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2354 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2355 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2356 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2359 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2360 minimum allowable size. */
2363 check_frame_size (frame
, rows
, cols
)
2367 /* For height, we have to see:
2368 how many windows the frame has at minimum (one or two),
2369 and whether it has a menu bar or other special stuff at the top. */
2371 = ((FRAME_MINIBUF_ONLY_P (frame
) || ! FRAME_HAS_MINIBUF_P (frame
))
2372 ? MIN_SAFE_WINDOW_HEIGHT
2373 : 2 * MIN_SAFE_WINDOW_HEIGHT
);
2375 if (FRAME_TOP_MARGIN (frame
) > 0)
2376 min_height
+= FRAME_TOP_MARGIN (frame
);
2378 if (*rows
< min_height
)
2380 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2381 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2385 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2386 check if W's width can be changed, otherwise check W's height.
2387 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2388 siblings, too. If none of the siblings is resizable, WINDOW isn't
2392 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2394 int width_p
, check_siblings_p
;
2399 if (!NILP (w
->hchild
))
2401 c
= XWINDOW (w
->hchild
);
2405 /* A horiz. combination is fixed-width if all of if its
2407 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2408 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2409 fixed_p
= c
== NULL
;
2413 /* A horiz. combination is fixed-height if one of if its
2415 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2416 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2417 fixed_p
= c
!= NULL
;
2420 else if (!NILP (w
->vchild
))
2422 c
= XWINDOW (w
->vchild
);
2426 /* A vert. combination is fixed-width if one of if its
2428 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2429 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2430 fixed_p
= c
!= NULL
;
2434 /* A vert. combination is fixed-height if all of if its
2436 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2437 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2438 fixed_p
= c
== NULL
;
2441 else if (BUFFERP (w
->buffer
))
2443 if (w
->height_fixed_p
&& !width_p
)
2447 struct buffer
*old
= current_buffer
;
2450 current_buffer
= XBUFFER (w
->buffer
);
2451 val
= find_symbol_value (Qwindow_size_fixed
);
2452 current_buffer
= old
;
2455 if (!EQ (val
, Qunbound
))
2457 fixed_p
= !NILP (val
);
2460 && ((EQ (val
, Qheight
) && width_p
)
2461 || (EQ (val
, Qwidth
) && !width_p
)))
2466 /* Can't tell if this one is resizable without looking at
2467 siblings. If all siblings are fixed-size this one is too. */
2468 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2472 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2473 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2477 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2478 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2492 /* Return the minimum size of window W, not taking fixed-width windows
2493 into account. WIDTH_P non-zero means return the minimum width,
2494 otherwise return the minimum height. If W is a combination window,
2495 compute the minimum size from the minimum sizes of W's children. */
2498 window_min_size_1 (w
, width_p
)
2505 if (!NILP (w
->hchild
))
2507 c
= XWINDOW (w
->hchild
);
2512 /* The min width of a horizontal combination is
2513 the sum of the min widths of its children. */
2516 size
+= window_min_size_1 (c
, width_p
);
2517 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2522 /* The min height a horizontal combination equals
2523 the maximum of all min height of its children. */
2526 int min_size
= window_min_size_1 (c
, width_p
);
2527 size
= max (min_size
, size
);
2528 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2532 else if (!NILP (w
->vchild
))
2534 c
= XWINDOW (w
->vchild
);
2539 /* The min width of a vertical combination is
2540 the maximum of the min widths of its children. */
2543 int min_size
= window_min_size_1 (c
, width_p
);
2544 size
= max (min_size
, size
);
2545 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2550 /* The min height of a vertical combination equals
2551 the sum of the min height of its children. */
2554 size
+= window_min_size_1 (c
, width_p
);
2555 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2562 size
= window_min_width
;
2565 if (MINI_WINDOW_P (w
)
2566 || (!WINDOW_WANTS_MODELINE_P (w
)
2567 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2570 size
= window_min_height
;
2578 /* Return the minimum size of window W, taking fixed-size windows into
2579 account. WIDTH_P non-zero means return the minimum width,
2580 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2581 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2582 unless FIXED is null. */
2585 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2587 int width_p
, ignore_fixed_p
, *fixed
;
2594 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2600 size
= width_p
? XFASTINT (w
->total_cols
) : XFASTINT (w
->total_lines
);
2602 size
= window_min_size_1 (w
, width_p
);
2608 /* Adjust the margins of window W if text area is too small.
2609 Return 1 if window width is ok after adjustment; 0 if window
2610 is still too narrow. */
2613 adjust_window_margins (w
)
2616 int box_cols
= (WINDOW_TOTAL_COLS (w
)
2617 - WINDOW_FRINGE_COLS (w
)
2618 - WINDOW_SCROLL_BAR_COLS (w
));
2619 int margin_cols
= (WINDOW_LEFT_MARGIN_COLS (w
)
2620 + WINDOW_RIGHT_MARGIN_COLS (w
));
2622 if (box_cols
- margin_cols
>= MIN_SAFE_WINDOW_WIDTH
)
2625 if (margin_cols
< 0 || box_cols
< MIN_SAFE_WINDOW_WIDTH
)
2628 /* Window's text area is too narrow, but reducing the window
2629 margins will fix that. */
2630 margin_cols
= box_cols
- MIN_SAFE_WINDOW_WIDTH
;
2631 if (WINDOW_RIGHT_MARGIN_COLS (w
) > 0)
2633 if (WINDOW_LEFT_MARGIN_COLS (w
) > 0)
2634 w
->left_margin_cols
= w
->right_margin_cols
2635 = make_number (margin_cols
/2);
2637 w
->right_margin_cols
= make_number (margin_cols
);
2640 w
->left_margin_cols
= make_number (margin_cols
);
2644 /* Calculate new sizes for windows in the list FORWARD when the window size
2645 goes from TOTAL to SIZE. TOTAL must be greater than SIZE.
2646 The number of windows in FORWARD is NCHILDREN, and the number that
2647 can shrink is SHRINKABLE.
2648 The minimum size a window can have is MIN_SIZE.
2649 If we are shrinking fixed windows, RESIZE_FIXED_P is non-zero.
2650 If we are shrinking columns, WIDTH_P is non-zero, otherwise we are
2653 This function returns an allocated array of new sizes that the caller
2654 must free. The size -1 means the window is fixed and RESIZE_FIXED_P
2655 is zero. Array index 0 refers to the first window in FORWARD, 1 to
2656 the second, and so on.
2658 This function tries to keep windows at least at the minimum size
2659 and resize other windows before it resizes any window to zero (i.e.
2660 delete that window).
2662 Windows are resized proportional to their size, so bigger windows
2663 shrink more than smaller windows. */
2665 shrink_windows (total
, size
, nchildren
, shrinkable
,
2666 min_size
, resize_fixed_p
, forward
, width_p
)
2667 int total
, size
, nchildren
, shrinkable
, min_size
;
2668 int resize_fixed_p
, width_p
;
2669 Lisp_Object forward
;
2671 int available_resize
= 0;
2675 int smallest
= total
;
2676 int total_removed
= 0;
2677 int total_shrink
= total
- size
;
2680 new_sizes
= xmalloc (sizeof (*new_sizes
) * nchildren
);
2682 for (i
= 0, child
= forward
; !NILP (child
); child
= c
->next
, ++i
)
2686 c
= XWINDOW (child
);
2687 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2689 if (! resize_fixed_p
&& window_fixed_size_p (c
, width_p
, 0))
2693 new_sizes
[i
] = child_size
;
2694 if (child_size
> min_size
)
2695 available_resize
+= child_size
- min_size
;
2698 /* We might need to shrink some windows to zero. Find the smallest
2699 windows and set them to 0 until we can fulfil the new size. */
2701 while (shrinkable
> 1 && size
+ available_resize
< total
)
2703 for (i
= 0; i
< nchildren
; ++i
)
2704 if (new_sizes
[i
] > 0 && smallest
> new_sizes
[i
])
2705 smallest
= new_sizes
[i
];
2707 for (i
= 0; i
< nchildren
; ++i
)
2708 if (new_sizes
[i
] == smallest
)
2710 /* Resize this window down to zero. */
2712 if (smallest
> min_size
)
2713 available_resize
-= smallest
- min_size
;
2714 available_resize
+= smallest
;
2716 total_removed
+= smallest
;
2718 /* We don't know what the smallest is now. */
2721 /* Out of for, just remove one window at the time and
2722 check again if we have enough space. */
2727 /* Now, calculate the new sizes. Try to shrink each window
2728 proportional to its size. */
2729 for (i
= 0; i
< nchildren
; ++i
)
2731 if (new_sizes
[i
] > min_size
)
2733 int to_shrink
= total_shrink
*new_sizes
[i
]/total
;
2734 if (new_sizes
[i
] - to_shrink
< min_size
)
2735 to_shrink
= new_sizes
[i
] - min_size
;
2736 new_sizes
[i
] -= to_shrink
;
2737 total_removed
+= to_shrink
;
2741 /* Any reminder due to rounding, we just subtract from windows
2742 that are left and still can be shrunk. */
2743 while (total_shrink
> total_removed
)
2745 int nonzero_sizes
= 0;
2746 int nonzero_idx
= -1;
2748 for (i
= 0; i
< nchildren
; ++i
)
2749 if (new_sizes
[i
] > 0)
2755 for (i
= 0; i
< nchildren
; ++i
)
2756 if (new_sizes
[i
] > min_size
)
2761 /* Out of for, just shrink one window at the time and
2762 check again if we have enough space. */
2767 /* Special case, only one window left. */
2768 if (nonzero_sizes
== 1)
2772 /* Any surplus due to rounding, we add to windows that are left. */
2773 while (total_shrink
< total_removed
)
2775 for (i
= 0; i
< nchildren
; ++i
)
2777 if (new_sizes
[i
] != 0 && total_shrink
< total_removed
)
2789 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2790 WINDOW's width. Resize WINDOW's children, if any, so that they
2791 keep their proportionate size relative to WINDOW. Propagate
2792 WINDOW's top or left edge position to children. Delete windows
2793 that become too small unless NODELETE_P is non-zero.
2795 If NODELETE_P is 2, that means we do delete windows that are
2796 too small, even if they were too small before! */
2799 size_window (window
, size
, width_p
, nodelete_p
)
2801 int size
, width_p
, nodelete_p
;
2803 struct window
*w
= XWINDOW (window
);
2805 Lisp_Object child
, *forward
, *sideward
;
2806 int old_size
, min_size
, safe_min_size
;
2808 /* We test nodelete_p != 2 and nodelete_p != 1 below, so it
2809 seems like it's too soon to do this here. ++KFS. */
2810 if (nodelete_p
== 2)
2813 check_min_window_sizes ();
2814 size
= max (0, size
);
2816 /* If the window has been "too small" at one point,
2817 don't delete it for being "too small" in the future.
2818 Preserve it as long as that is at all possible. */
2821 old_size
= WINDOW_TOTAL_COLS (w
);
2822 min_size
= window_min_width
;
2823 /* Ensure that there is room for the scroll bar and fringes!
2824 We may reduce display margins though. */
2825 safe_min_size
= (MIN_SAFE_WINDOW_WIDTH
2826 + WINDOW_FRINGE_COLS (w
)
2827 + WINDOW_SCROLL_BAR_COLS (w
));
2831 old_size
= XINT (w
->total_lines
);
2832 min_size
= window_min_height
;
2833 safe_min_size
= MIN_SAFE_WINDOW_HEIGHT
;
2836 if (old_size
< min_size
&& nodelete_p
!= 2)
2837 w
->too_small_ok
= Qt
;
2839 /* Maybe delete WINDOW if it's too small. */
2840 if (nodelete_p
!= 1 && !NILP (w
->parent
))
2842 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2843 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2844 if (min_size
< safe_min_size
)
2845 min_size
= safe_min_size
;
2846 if (size
< min_size
)
2848 delete_window (window
);
2853 /* Set redisplay hints. */
2854 w
->last_modified
= make_number (0);
2855 w
->last_overlay_modified
= make_number (0);
2856 windows_or_buffers_changed
++;
2857 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2861 sideward
= &w
->vchild
;
2862 forward
= &w
->hchild
;
2863 w
->total_cols
= make_number (size
);
2864 adjust_window_margins (w
);
2868 sideward
= &w
->hchild
;
2869 forward
= &w
->vchild
;
2870 w
->total_lines
= make_number (size
);
2871 w
->orig_total_lines
= Qnil
;
2874 if (!NILP (*sideward
))
2876 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2878 c
= XWINDOW (child
);
2880 c
->left_col
= w
->left_col
;
2882 c
->top_line
= w
->top_line
;
2883 size_window (child
, size
, width_p
, nodelete_p
);
2886 else if (!NILP (*forward
))
2888 int fixed_size
, each
, extra
, n
;
2889 int resize_fixed_p
, nfixed
;
2890 int last_pos
, first_pos
, nchildren
, total
;
2891 int *new_sizes
= NULL
;
2893 /* Determine the fixed-size portion of the this window, and the
2894 number of child windows. */
2895 fixed_size
= nchildren
= nfixed
= total
= 0;
2896 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2900 c
= XWINDOW (child
);
2901 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2902 total
+= child_size
;
2904 if (window_fixed_size_p (c
, width_p
, 0))
2906 fixed_size
+= child_size
;
2911 /* If the new size is smaller than fixed_size, or if there
2912 aren't any resizable windows, allow resizing fixed-size
2914 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2916 /* Compute how many lines/columns to add/remove to each child. The
2917 value of extra takes care of rounding errors. */
2918 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2919 if (size
< total
&& n
> 1)
2920 new_sizes
= shrink_windows (total
, size
, nchildren
, n
, min_size
,
2921 resize_fixed_p
, *forward
, width_p
);
2924 each
= (size
- total
) / n
;
2925 extra
= (size
- total
) - n
* each
;
2928 /* Compute new children heights and edge positions. */
2929 first_pos
= width_p
? XINT (w
->left_col
) : XINT (w
->top_line
);
2930 last_pos
= first_pos
;
2931 for (n
= 0, child
= *forward
; !NILP (child
); child
= c
->next
, ++n
)
2933 int new_size
, old_size
;
2935 c
= XWINDOW (child
);
2936 old_size
= width_p
? XFASTINT (c
->total_cols
) : XFASTINT (c
->total_lines
);
2937 new_size
= old_size
;
2939 /* The top or left edge position of this child equals the
2940 bottom or right edge of its predecessor. */
2942 c
->left_col
= make_number (last_pos
);
2944 c
->top_line
= make_number (last_pos
);
2946 /* If this child can be resized, do it. */
2947 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2949 new_size
= new_sizes
? new_sizes
[n
] : old_size
+ each
+ extra
;
2953 /* Set new height. Note that size_window also propagates
2954 edge positions to children, so it's not a no-op if we
2955 didn't change the child's size. */
2956 size_window (child
, new_size
, width_p
, 1);
2958 /* Remember the bottom/right edge position of this child; it
2959 will be used to set the top/left edge of the next child. */
2960 last_pos
+= new_size
;
2963 if (new_sizes
) xfree (new_sizes
);
2965 /* We should have covered the parent exactly with child windows. */
2966 xassert (size
== last_pos
- first_pos
);
2968 /* Now delete any children that became too small. */
2970 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2973 c
= XWINDOW (child
);
2974 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2975 size_window (child
, child_size
, width_p
, 2);
2980 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2981 WINDOW's children. NODELETE non-zero means don't delete windows
2982 that become too small in the process. (The caller should check
2983 later and do so if appropriate.) */
2986 set_window_height (window
, height
, nodelete
)
2991 size_window (window
, height
, 0, nodelete
);
2995 /* Set WINDOW's width to WIDTH, and recursively change the width of
2996 WINDOW's children. NODELETE non-zero means don't delete windows
2997 that become too small in the process. (The caller should check
2998 later and do so if appropriate.) */
3001 set_window_width (window
, width
, nodelete
)
3006 size_window (window
, width
, 1, nodelete
);
3009 /* Change window heights in windows rooted in WINDOW by N lines. */
3012 change_window_heights (window
, n
)
3016 struct window
*w
= XWINDOW (window
);
3018 XSETFASTINT (w
->top_line
, XFASTINT (w
->top_line
) + n
);
3019 XSETFASTINT (w
->total_lines
, XFASTINT (w
->total_lines
) - n
);
3021 if (INTEGERP (w
->orig_top_line
))
3022 XSETFASTINT (w
->orig_top_line
, XFASTINT (w
->orig_top_line
) + n
);
3023 if (INTEGERP (w
->orig_total_lines
))
3024 XSETFASTINT (w
->orig_total_lines
, XFASTINT (w
->orig_total_lines
) - n
);
3026 /* Handle just the top child in a vertical split. */
3027 if (!NILP (w
->vchild
))
3028 change_window_heights (w
->vchild
, n
);
3030 /* Adjust all children in a horizontal split. */
3031 for (window
= w
->hchild
; !NILP (window
); window
= w
->next
)
3033 w
= XWINDOW (window
);
3034 change_window_heights (window
, n
);
3039 int window_select_count
;
3042 Fset_window_buffer_unwind (obuf
)
3049 EXFUN (Fset_window_fringes
, 4);
3050 EXFUN (Fset_window_scroll_bars
, 4);
3052 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
3053 means it's allowed to run hooks. See make_frame for a case where
3054 it's not allowed. KEEP_MARGINS_P non-zero means that the current
3055 margins, fringes, and scroll-bar settings of the window are not
3056 reset from the buffer's local settings. */
3059 set_window_buffer (window
, buffer
, run_hooks_p
, keep_margins_p
)
3060 Lisp_Object window
, buffer
;
3061 int run_hooks_p
, keep_margins_p
;
3063 struct window
*w
= XWINDOW (window
);
3064 struct buffer
*b
= XBUFFER (buffer
);
3065 int count
= SPECPDL_INDEX ();
3069 if (EQ (window
, selected_window
))
3070 b
->last_selected_window
= window
;
3072 /* Let redisplay errors through. */
3073 b
->display_error_modiff
= 0;
3075 /* Update time stamps of buffer display. */
3076 if (INTEGERP (b
->display_count
))
3077 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
3078 b
->display_time
= Fcurrent_time ();
3080 XSETFASTINT (w
->window_end_pos
, 0);
3081 XSETFASTINT (w
->window_end_vpos
, 0);
3082 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
3083 w
->window_end_valid
= Qnil
;
3084 w
->hscroll
= w
->min_hscroll
= make_number (0);
3086 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
3087 set_marker_restricted (w
->start
,
3088 make_number (b
->last_window_start
),
3090 w
->start_at_line_beg
= Qnil
;
3091 w
->force_start
= Qnil
;
3092 XSETFASTINT (w
->last_modified
, 0);
3093 XSETFASTINT (w
->last_overlay_modified
, 0);
3094 windows_or_buffers_changed
++;
3096 /* We must select BUFFER for running the window-scroll-functions.
3097 If WINDOW is selected, switch permanently.
3098 Otherwise, switch but go back to the ambient buffer afterward. */
3099 if (EQ (window
, selected_window
))
3100 Fset_buffer (buffer
);
3101 /* We can't check ! NILP (Vwindow_scroll_functions) here
3102 because that might itself be a local variable. */
3103 else if (window_initialized
)
3105 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
3106 Fset_buffer (buffer
);
3109 if (!keep_margins_p
)
3111 /* Set left and right marginal area width etc. from buffer. */
3113 /* This may call adjust_window_margins three times, so
3114 temporarily disable window margins. */
3115 Lisp_Object save_left
= w
->left_margin_cols
;
3116 Lisp_Object save_right
= w
->right_margin_cols
;
3118 w
->left_margin_cols
= w
->right_margin_cols
= Qnil
;
3120 Fset_window_fringes (window
,
3121 b
->left_fringe_width
, b
->right_fringe_width
,
3122 b
->fringes_outside_margins
);
3124 Fset_window_scroll_bars (window
,
3125 b
->scroll_bar_width
,
3126 b
->vertical_scroll_bar_type
, Qnil
);
3128 w
->left_margin_cols
= save_left
;
3129 w
->right_margin_cols
= save_right
;
3131 Fset_window_margins (window
,
3132 b
->left_margin_cols
, b
->right_margin_cols
);
3137 if (! NILP (Vwindow_scroll_functions
))
3138 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
3139 Fmarker_position (w
->start
));
3141 if (! NILP (Vwindow_configuration_change_hook
)
3142 && ! NILP (Vrun_hooks
))
3143 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3146 unbind_to (count
, Qnil
);
3150 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 3, 0,
3151 doc
: /* Make WINDOW display BUFFER as its contents.
3152 BUFFER can be a buffer or the name of an existing buffer.
3153 Optional third arg KEEP-MARGINS non-nil means that WINDOW's current
3154 display margins, fringe widths, and scroll bar settings are maintained;
3155 the default is to reset these from BUFFER's local settings or the frame
3158 This function runs the hook `window-scroll-functions'. */)
3159 (window
, buffer
, keep_margins
)
3160 register Lisp_Object window
, buffer
, keep_margins
;
3162 register Lisp_Object tem
;
3163 register struct window
*w
= decode_window (window
);
3165 XSETWINDOW (window
, w
);
3166 buffer
= Fget_buffer (buffer
);
3167 CHECK_BUFFER (buffer
);
3169 if (NILP (XBUFFER (buffer
)->name
))
3170 error ("Attempt to display deleted buffer");
3174 error ("Window is deleted");
3175 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
3176 is first being set up. */
3178 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
3179 error ("Window is dedicated to `%s'",
3180 SDATA (XBUFFER (tem
)->name
));
3185 set_window_buffer (window
, buffer
, 1, !NILP (keep_margins
));
3189 /* Note that selected_window can be nil
3190 when this is called from Fset_window_configuration. */
3192 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 2, 0,
3193 doc
: /* Select WINDOW. Most editing will apply to WINDOW's buffer.
3194 If WINDOW is not already selected, make WINDOW's buffer current
3195 and make WINDOW the frame's selected window. Return WINDOW.
3196 Optional second arg NORECORD non-nil means
3197 do not put this buffer at the front of the list of recently selected ones.
3199 Note that the main editor command loop
3200 selects the buffer of the selected window before each command. */)
3202 register Lisp_Object window
, norecord
;
3204 register struct window
*w
;
3205 register struct window
*ow
;
3208 CHECK_LIVE_WINDOW (window
);
3210 w
= XWINDOW (window
);
3211 w
->frozen_window_start_p
= 0;
3213 ++window_select_count
;
3214 XSETFASTINT (w
->use_time
, window_select_count
);
3215 if (EQ (window
, selected_window
))
3218 /* Store the current buffer's actual point into the
3219 old selected window. It belongs to that window,
3220 and when the window is not selected, must be in the window. */
3221 if (!NILP (selected_window
))
3223 ow
= XWINDOW (selected_window
);
3224 if (! NILP (ow
->buffer
))
3225 set_marker_both (ow
->pointm
, ow
->buffer
,
3226 BUF_PT (XBUFFER (ow
->buffer
)),
3227 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
3230 selected_window
= window
;
3231 sf
= SELECTED_FRAME ();
3232 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
3234 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
3235 /* Use this rather than Fhandle_switch_frame
3236 so that FRAME_FOCUS_FRAME is moved appropriately as we
3237 move around in the state where a minibuffer in a separate
3239 Fselect_frame (WINDOW_FRAME (w
));
3242 sf
->selected_window
= window
;
3244 if (NILP (norecord
))
3245 record_buffer (w
->buffer
);
3246 Fset_buffer (w
->buffer
);
3248 XBUFFER (w
->buffer
)->last_selected_window
= window
;
3250 /* Go to the point recorded in the window.
3251 This is important when the buffer is in more
3252 than one window. It also matters when
3253 redisplay_window has altered point after scrolling,
3254 because it makes the change only in the window. */
3256 register int new_point
= marker_position (w
->pointm
);
3257 if (new_point
< BEGV
)
3259 else if (new_point
> ZV
)
3265 windows_or_buffers_changed
++;
3270 select_window_norecord (window
)
3273 return Fselect_window (window
, Qt
);
3276 /* Deiconify the frame containing the window WINDOW,
3277 unless it is the selected frame;
3280 The reason for the exception for the selected frame
3281 is that it seems better not to change the selected frames visibility
3282 merely because of displaying a different buffer in it.
3283 The deiconification is useful when a buffer gets shown in
3284 another frame that you were not using lately. */
3287 display_buffer_1 (window
)
3290 Lisp_Object frame
= XWINDOW (window
)->frame
;
3291 FRAME_PTR f
= XFRAME (frame
);
3293 FRAME_SAMPLE_VISIBILITY (f
);
3295 if (EQ (frame
, selected_frame
))
3296 ; /* Assume the selected frame is already visible enough. */
3297 else if (minibuf_level
> 0
3298 && MINI_WINDOW_P (XWINDOW (selected_window
))
3299 && WINDOW_LIVE_P (minibuf_selected_window
)
3300 && EQ (frame
, WINDOW_FRAME (XWINDOW (minibuf_selected_window
))))
3301 ; /* Assume the frame from which we invoked the minibuffer is visible. */
3304 if (FRAME_ICONIFIED_P (f
))
3305 Fmake_frame_visible (frame
);
3306 else if (FRAME_VISIBLE_P (f
))
3307 Fraise_frame (frame
);
3313 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
3314 doc
: /* Returns non-nil if a buffer named BUFFER-NAME gets a special frame.
3315 If the value is t, `display-buffer' or `pop-to-buffer' would create a
3316 special frame for that buffer using the default frame parameters.
3318 If the value is a list, it is a list of frame parameters that would be used
3319 to make a frame for that buffer.
3320 The variables `special-display-buffer-names'
3321 and `special-display-regexps' control this. */)
3323 Lisp_Object buffer_name
;
3327 CHECK_STRING (buffer_name
);
3329 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
3333 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
3337 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3339 Lisp_Object car
= XCAR (tem
);
3341 && fast_string_match (car
, buffer_name
) >= 0)
3343 else if (CONSP (car
)
3344 && STRINGP (XCAR (car
))
3345 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3351 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
3352 doc
: /* Returns non-nil if a buffer named BUFFER-NAME would use the same window.
3353 More precisely, if `display-buffer' or `pop-to-buffer' would display
3354 that buffer in the selected window rather than (as usual) in some other window.
3355 See `same-window-buffer-names' and `same-window-regexps'. */)
3357 Lisp_Object buffer_name
;
3361 CHECK_STRING (buffer_name
);
3363 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
3367 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
3371 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3373 Lisp_Object car
= XCAR (tem
);
3375 && fast_string_match (car
, buffer_name
) >= 0)
3377 else if (CONSP (car
)
3378 && STRINGP (XCAR (car
))
3379 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3385 /* Use B so the default is (other-buffer). */
3386 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
3387 "BDisplay buffer: \nP",
3388 doc
: /* Make BUFFER appear in some window but don't select it.
3389 BUFFER must be the name of an existing buffer, or, when called from Lisp,
3391 If BUFFER is shown already in some window, just use that one,
3392 unless the window is the selected window and the optional second
3393 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).
3394 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.
3395 Returns the window displaying BUFFER.
3396 If `display-buffer-reuse-frames' is non-nil, and another frame is currently
3397 displaying BUFFER, then simply raise that frame.
3399 The variables `special-display-buffer-names',
3400 `special-display-regexps', `same-window-buffer-names', and
3401 `same-window-regexps' customize how certain buffer names are handled.
3402 The latter two take effect only if NOT-THIS-WINDOW is t.
3404 If optional argument FRAME is `visible', search all visible frames.
3405 If FRAME is 0, search all visible and iconified frames.
3406 If FRAME is t, search all frames.
3407 If FRAME is a frame, search only that frame.
3408 If FRAME is nil, search only the selected frame
3409 (actually the last nonminibuffer frame),
3410 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,
3411 which means search visible and iconified frames.
3413 If a full-width window on a splittable frame is available to display
3414 the buffer, it may be split, subject to the value of the variable
3415 `split-height-threshold'.
3417 If `even-window-heights' is non-nil, window heights will be evened out
3418 if displaying the buffer causes two vertically adjacent windows to be
3420 (buffer
, not_this_window
, frame
)
3421 register Lisp_Object buffer
, not_this_window
, frame
;
3423 register Lisp_Object window
, tem
, swp
;
3427 buffer
= Fget_buffer (buffer
);
3428 CHECK_BUFFER (buffer
);
3430 if (!NILP (Vdisplay_buffer_function
))
3431 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
3433 if (NILP (not_this_window
)
3434 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
3435 return display_buffer_1 (selected_window
);
3437 /* See if the user has specified this buffer should appear
3438 in the selected window. */
3439 if (NILP (not_this_window
))
3441 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
3442 if (!NILP (swp
) && !no_switch_window (selected_window
))
3444 Fswitch_to_buffer (buffer
, Qnil
);
3445 return display_buffer_1 (selected_window
);
3449 /* If the user wants pop-up-frames or display-buffer-reuse-frames,
3450 look for a window showing BUFFER on any visible or iconified frame.
3451 Otherwise search only the current frame. */
3454 else if (pop_up_frames
3455 || display_buffer_reuse_frames
3456 || last_nonminibuf_frame
== 0)
3457 XSETFASTINT (tem
, 0);
3459 XSETFRAME (tem
, last_nonminibuf_frame
);
3461 window
= Fget_buffer_window (buffer
, tem
);
3463 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
3464 return display_buffer_1 (window
);
3466 /* Certain buffer names get special handling. */
3467 if (!NILP (Vspecial_display_function
) && NILP (swp
))
3469 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
3471 return call1 (Vspecial_display_function
, buffer
);
3473 return call2 (Vspecial_display_function
, buffer
, tem
);
3476 /* If there are no frames open that have more than a minibuffer,
3477 we need to create a new frame. */
3478 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
3480 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3481 Fset_window_buffer (window
, buffer
, Qnil
);
3482 return display_buffer_1 (window
);
3485 f
= SELECTED_FRAME ();
3487 || FRAME_MINIBUF_ONLY_P (f
)
3488 /* If the current frame is a special display frame,
3489 don't try to reuse its windows. */
3490 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
3495 if (FRAME_MINIBUF_ONLY_P (f
))
3496 XSETFRAME (frames
, last_nonminibuf_frame
);
3497 /* Don't try to create a window if we would get an error. */
3498 if (split_height_threshold
< window_min_height
<< 1)
3499 split_height_threshold
= window_min_height
<< 1;
3501 /* Note that both Fget_largest_window and Fget_lru_window
3502 ignore minibuffers and dedicated windows.
3503 This means they can return nil. */
3505 /* If the frame we would try to split cannot be split,
3506 try other frames. */
3507 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
3509 /* Try visible frames first. */
3510 window
= Fget_largest_window (Qvisible
);
3511 /* If that didn't work, try iconified frames. */
3513 window
= Fget_largest_window (make_number (0));
3515 window
= Fget_largest_window (Qt
);
3518 window
= Fget_largest_window (frames
);
3520 /* If we got a tall enough full-width window that can be split,
3523 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3524 && window_height (window
) >= split_height_threshold
3525 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
3526 window
= Fsplit_window (window
, Qnil
, Qnil
);
3529 Lisp_Object upper
, lower
, other
;
3531 window
= Fget_lru_window (frames
);
3532 /* If the LRU window is selected, and big enough,
3533 and can be split, split it. */
3535 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3536 && (EQ (window
, selected_window
)
3537 || EQ (XWINDOW (window
)->parent
, Qnil
))
3538 && window_height (window
) >= window_min_height
<< 1)
3539 window
= Fsplit_window (window
, Qnil
, Qnil
);
3540 /* If Fget_lru_window returned nil, try other approaches. */
3542 /* Try visible frames first. */
3544 window
= Fget_buffer_window (buffer
, Qvisible
);
3546 window
= Fget_largest_window (Qvisible
);
3547 /* If that didn't work, try iconified frames. */
3549 window
= Fget_buffer_window (buffer
, make_number (0));
3551 window
= Fget_largest_window (make_number (0));
3552 /* Try invisible frames. */
3554 window
= Fget_buffer_window (buffer
, Qt
);
3556 window
= Fget_largest_window (Qt
);
3557 /* As a last resort, make a new frame. */
3559 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3560 /* If window appears above or below another,
3561 even out their heights. */
3562 other
= upper
= lower
= Qnil
;
3563 if (!NILP (XWINDOW (window
)->prev
))
3564 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3565 if (!NILP (XWINDOW (window
)->next
))
3566 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3568 && !NILP (Veven_window_heights
)
3569 /* Check that OTHER and WINDOW are vertically arrayed. */
3570 && !EQ (XWINDOW (other
)->top_line
, XWINDOW (window
)->top_line
)
3571 && (XFASTINT (XWINDOW (other
)->total_lines
)
3572 > XFASTINT (XWINDOW (window
)->total_lines
)))
3574 int total
= (XFASTINT (XWINDOW (other
)->total_lines
)
3575 + XFASTINT (XWINDOW (window
)->total_lines
));
3576 enlarge_window (upper
,
3577 total
/ 2 - XFASTINT (XWINDOW (upper
)->total_lines
),
3583 window
= Fget_lru_window (Qnil
);
3585 Fset_window_buffer (window
, buffer
, Qnil
);
3586 return display_buffer_1 (window
);
3590 DEFUN ("force-window-update", Fforce_window_update
, Sforce_window_update
,
3592 doc
: /* Force redisplay of all windows.
3593 If optional arg OBJECT is a window, force redisplay of that window only.
3594 If OBJECT is a buffer or buffer name, force redisplay of all windows
3595 displaying that buffer. */)
3601 windows_or_buffers_changed
++;
3602 update_mode_lines
++;
3606 if (WINDOWP (object
))
3608 struct window
*w
= XWINDOW (object
);
3609 mark_window_display_accurate (object
, 0);
3610 w
->update_mode_line
= Qt
;
3611 if (BUFFERP (w
->buffer
))
3612 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
3613 ++update_mode_lines
;
3617 if (STRINGP (object
))
3618 object
= Fget_buffer (object
);
3619 if (BUFFERP (object
) && !NILP (XBUFFER (object
)->name
))
3621 /* Walk all windows looking for buffer, and force update
3622 of each of those windows. */
3624 object
= window_loop (REDISPLAY_BUFFER_WINDOWS
, object
, 0, Qvisible
);
3625 return NILP (object
) ? Qnil
: Qt
;
3628 /* If nothing suitable was found, just return.
3629 We could signal an error, but this feature will typically be used
3630 asynchronously in timers or process sentinels, so we don't. */
3636 temp_output_buffer_show (buf
)
3637 register Lisp_Object buf
;
3639 register struct buffer
*old
= current_buffer
;
3640 register Lisp_Object window
;
3641 register struct window
*w
;
3643 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3646 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3650 #if 0 /* rms: there should be no reason for this. */
3651 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3653 set_buffer_internal (old
);
3655 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3656 call1 (Vtemp_buffer_show_function
, buf
);
3659 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3661 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3662 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3663 Vminibuf_scroll_window
= window
;
3664 w
= XWINDOW (window
);
3665 XSETFASTINT (w
->hscroll
, 0);
3666 XSETFASTINT (w
->min_hscroll
, 0);
3667 set_marker_restricted_both (w
->start
, buf
, BEG
, BEG
);
3668 set_marker_restricted_both (w
->pointm
, buf
, BEG
, BEG
);
3670 /* Run temp-buffer-show-hook, with the chosen window selected
3671 and its buffer current. */
3673 if (!NILP (Vrun_hooks
)
3674 && !NILP (Fboundp (Qtemp_buffer_show_hook
))
3675 && !NILP (Fsymbol_value (Qtemp_buffer_show_hook
)))
3677 int count
= SPECPDL_INDEX ();
3678 Lisp_Object prev_window
, prev_buffer
;
3679 prev_window
= selected_window
;
3680 XSETBUFFER (prev_buffer
, old
);
3682 /* Select the window that was chosen, for running the hook.
3683 Note: Both Fselect_window and select_window_norecord may
3684 set-buffer to the buffer displayed in the window,
3685 so we need to save the current buffer. --stef */
3686 record_unwind_protect (Fset_buffer
, prev_buffer
);
3687 record_unwind_protect (select_window_norecord
, prev_window
);
3688 Fselect_window (window
, Qt
);
3689 Fset_buffer (w
->buffer
);
3690 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3691 unbind_to (count
, Qnil
);
3697 make_dummy_parent (window
)
3701 register struct window
*o
, *p
;
3704 o
= XWINDOW (window
);
3705 p
= allocate_window ();
3706 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3707 ((struct Lisp_Vector
*) p
)->contents
[i
]
3708 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3709 XSETWINDOW (new, p
);
3712 XSETFASTINT (p
->sequence_number
, sequence_number
);
3714 /* Put new into window structure in place of window */
3715 replace_window (window
, new);
3728 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3729 doc
: /* Split WINDOW, putting SIZE lines in the first of the pair.
3730 WINDOW defaults to selected one and SIZE to half its size.
3731 If optional third arg HORFLAG is non-nil, split side by side
3732 and put SIZE columns in the first of the pair. In that case,
3733 SIZE includes that window's scroll bar, or the divider column to its right.
3734 Interactively, all arguments are nil.
3736 Returns the newly created window (which is the lower or rightmost one).
3737 The upper or leftmost window is the original one and remains selected.
3738 See Info node `(elisp)Splitting Windows' for more details and examples.*/)
3739 (window
, size
, horflag
)
3740 Lisp_Object window
, size
, horflag
;
3742 register Lisp_Object
new;
3743 register struct window
*o
, *p
;
3745 register int size_int
;
3748 window
= selected_window
;
3750 CHECK_LIVE_WINDOW (window
);
3752 o
= XWINDOW (window
);
3753 fo
= XFRAME (WINDOW_FRAME (o
));
3757 if (!NILP (horflag
))
3758 /* Calculate the size of the left-hand window, by dividing
3759 the usable space in columns by two.
3760 We round up, since the left-hand window may include
3761 a dividing line, while the right-hand may not. */
3762 size_int
= (XFASTINT (o
->total_cols
) + 1) >> 1;
3764 size_int
= XFASTINT (o
->total_lines
) >> 1;
3768 CHECK_NUMBER (size
);
3769 size_int
= XINT (size
);
3772 if (MINI_WINDOW_P (o
))
3773 error ("Attempt to split minibuffer window");
3774 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3775 error ("Attempt to split fixed-size window");
3777 check_min_window_sizes ();
3781 if (size_int
< window_min_height
)
3782 error ("Window height %d too small (after splitting)", size_int
);
3783 if (size_int
+ window_min_height
> XFASTINT (o
->total_lines
))
3784 error ("Window height %d too small (after splitting)",
3785 XFASTINT (o
->total_lines
) - size_int
);
3786 if (NILP (o
->parent
)
3787 || NILP (XWINDOW (o
->parent
)->vchild
))
3789 make_dummy_parent (window
);
3791 XWINDOW (new)->vchild
= window
;
3796 if (size_int
< window_min_width
)
3797 error ("Window width %d too small (after splitting)", size_int
);
3799 if (size_int
+ window_min_width
> XFASTINT (o
->total_cols
))
3800 error ("Window width %d too small (after splitting)",
3801 XFASTINT (o
->total_cols
) - size_int
);
3802 if (NILP (o
->parent
)
3803 || NILP (XWINDOW (o
->parent
)->hchild
))
3805 make_dummy_parent (window
);
3807 XWINDOW (new)->hchild
= window
;
3811 /* Now we know that window's parent is a vertical combination
3812 if we are dividing vertically, or a horizontal combination
3813 if we are making side-by-side windows */
3815 windows_or_buffers_changed
++;
3816 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3817 new = make_window ();
3820 p
->frame
= o
->frame
;
3822 if (!NILP (p
->next
))
3823 XWINDOW (p
->next
)->prev
= new;
3826 p
->parent
= o
->parent
;
3828 p
->window_end_valid
= Qnil
;
3829 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3831 /* Duplicate special geometry settings. */
3833 p
->left_margin_cols
= o
->left_margin_cols
;
3834 p
->right_margin_cols
= o
->right_margin_cols
;
3835 p
->left_fringe_width
= o
->left_fringe_width
;
3836 p
->right_fringe_width
= o
->right_fringe_width
;
3837 p
->fringes_outside_margins
= o
->fringes_outside_margins
;
3838 p
->scroll_bar_width
= o
->scroll_bar_width
;
3839 p
->vertical_scroll_bar_type
= o
->vertical_scroll_bar_type
;
3841 /* Apportion the available frame space among the two new windows */
3843 if (!NILP (horflag
))
3845 p
->total_lines
= o
->total_lines
;
3846 p
->top_line
= o
->top_line
;
3847 XSETFASTINT (p
->total_cols
, XFASTINT (o
->total_cols
) - size_int
);
3848 XSETFASTINT (o
->total_cols
, size_int
);
3849 XSETFASTINT (p
->left_col
, XFASTINT (o
->left_col
) + size_int
);
3850 adjust_window_margins (p
);
3851 adjust_window_margins (o
);
3855 p
->left_col
= o
->left_col
;
3856 p
->total_cols
= o
->total_cols
;
3857 XSETFASTINT (p
->total_lines
, XFASTINT (o
->total_lines
) - size_int
);
3858 XSETFASTINT (o
->total_lines
, size_int
);
3859 XSETFASTINT (p
->top_line
, XFASTINT (o
->top_line
) + size_int
);
3862 /* Adjust glyph matrices. */
3865 Fset_window_buffer (new, o
->buffer
, Qt
);
3869 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 3, "p",
3870 doc
: /* Make current window ARG lines bigger.
3871 From program, optional second arg non-nil means grow sideways ARG columns.
3872 Interactively, if an argument is not given, make the window one line bigger.
3874 Optional third arg PRESERVE-BEFORE, if non-nil, means do not change the size
3875 of the siblings above or to the left of the selected window. Only
3876 siblings to the right or below are changed. */)
3877 (arg
, side
, preserve_before
)
3878 register Lisp_Object arg
, side
, preserve_before
;
3881 enlarge_window (selected_window
, XINT (arg
), !NILP (side
),
3882 !NILP (preserve_before
));
3884 if (! NILP (Vwindow_configuration_change_hook
))
3885 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3890 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 3, "p",
3891 doc
: /* Make current window ARG lines smaller.
3892 From program, optional second arg non-nil means shrink sideways arg columns.
3893 Interactively, if an argument is not given, make the window one line smaller.
3895 Optional third arg PRESERVE-BEFORE, if non-nil, means do not change the size
3896 of the siblings above or to the left of the selected window. Only
3897 siblings to the right or below are changed. */)
3898 (arg
, side
, preserve_before
)
3899 register Lisp_Object arg
, side
, preserve_before
;
3902 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
),
3903 !NILP (preserve_before
));
3905 if (! NILP (Vwindow_configuration_change_hook
))
3906 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3912 window_height (window
)
3915 register struct window
*p
= XWINDOW (window
);
3916 return WINDOW_TOTAL_LINES (p
);
3920 window_width (window
)
3923 register struct window
*p
= XWINDOW (window
);
3924 return WINDOW_TOTAL_COLS (p
);
3929 *(widthflag ? &(XWINDOW (w)->left_col) : &(XWINDOW (w)->top_line))
3931 #define CURSIZE(w) \
3932 *(widthflag ? &(XWINDOW (w)->total_cols) : &(XWINDOW (w)->total_lines))
3935 /* Enlarge WINDOW by DELTA. WIDTHFLAG non-zero means
3936 increase its width. Siblings of the selected window are resized to
3937 fulfill the size request. If they become too small in the process,
3938 they will be deleted.
3940 If PRESERVE_BEFORE is nonzero, that means don't alter
3941 the siblings to the left or above WINDOW. */
3944 enlarge_window (window
, delta
, widthflag
, preserve_before
)
3946 int delta
, widthflag
, preserve_before
;
3948 Lisp_Object parent
, next
, prev
;
3952 int (*sizefun
) P_ ((Lisp_Object
))
3953 = widthflag
? window_width
: window_height
;
3954 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3955 = (widthflag
? set_window_width
: set_window_height
);
3957 /* Check values of window_min_width and window_min_height for
3959 check_min_window_sizes ();
3961 /* Give up if this window cannot be resized. */
3962 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3963 error ("Window is not resizable");
3965 /* Find the parent of the selected window. */
3968 p
= XWINDOW (window
);
3974 error ("No other window to side of this one");
3979 ? !NILP (XWINDOW (parent
)->hchild
)
3980 : !NILP (XWINDOW (parent
)->vchild
))
3986 sizep
= &CURSIZE (window
);
3989 register int maxdelta
;
3991 /* Compute the maximum size increment this window can have. */
3993 if (preserve_before
)
3997 maxdelta
= (*sizefun
) (parent
) - XINT (*sizep
);
3998 /* Subtract size of siblings before, since we can't take that. */
3999 maxdelta
-= XINT (CURBEG (window
)) - XINT (CURBEG (parent
));
4002 maxdelta
= (!NILP (p
->next
) ? ((*sizefun
) (p
->next
)
4003 - window_min_size (XWINDOW (p
->next
),
4008 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
4009 /* This is a main window followed by a minibuffer. */
4010 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
4011 - window_min_size (XWINDOW (p
->next
),
4013 /* This is a minibuffer following a main window. */
4014 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
4015 - window_min_size (XWINDOW (p
->prev
),
4017 /* This is a frame with only one window, a minibuffer-only
4018 or a minibufferless frame. */
4021 if (delta
> maxdelta
)
4022 /* This case traps trying to make the minibuffer
4023 the full frame, or make the only window aside from the
4024 minibuffer the full frame. */
4028 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
4030 delete_window (window
);
4037 /* Find the total we can get from other siblings without deleting them. */
4039 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
4040 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
4042 if (! preserve_before
)
4043 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
4044 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
4047 /* If we can get it all from them without deleting them, do so. */
4048 if (delta
<= maximum
)
4050 Lisp_Object first_unaffected
;
4051 Lisp_Object first_affected
;
4056 first_affected
= window
;
4057 /* Look at one sibling at a time,
4058 moving away from this window in both directions alternately,
4059 and take as much as we can get without deleting that sibling. */
4061 && (!NILP (next
) || (!preserve_before
&& !NILP (prev
))))
4065 int this_one
= ((*sizefun
) (next
)
4066 - window_min_size (XWINDOW (next
),
4067 widthflag
, 0, &fixed_p
));
4070 if (this_one
> delta
)
4073 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
4074 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4079 next
= XWINDOW (next
)->next
;
4085 if (!preserve_before
&& ! NILP (prev
))
4087 int this_one
= ((*sizefun
) (prev
)
4088 - window_min_size (XWINDOW (prev
),
4089 widthflag
, 0, &fixed_p
));
4092 if (this_one
> delta
)
4095 first_affected
= prev
;
4097 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
4098 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4103 prev
= XWINDOW (prev
)->prev
;
4107 xassert (delta
== 0);
4109 /* Now recalculate the edge positions of all the windows affected,
4110 based on the new sizes. */
4111 first_unaffected
= next
;
4112 prev
= first_affected
;
4113 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
4114 prev
= next
, next
= XWINDOW (next
)->next
)
4116 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
4117 /* This does not change size of NEXT,
4118 but it propagates the new top edge to its children */
4119 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
4124 register int delta1
;
4125 register int opht
= (*sizefun
) (parent
);
4127 if (opht
<= XINT (*sizep
) + delta
)
4129 /* If trying to grow this window to or beyond size of the parent,
4130 just delete all the sibling windows. */
4131 Lisp_Object start
, tem
, next
;
4133 start
= XWINDOW (parent
)->vchild
;
4135 start
= XWINDOW (parent
)->hchild
;
4137 /* Delete any siblings that come after WINDOW. */
4138 tem
= XWINDOW (window
)->next
;
4139 while (! NILP (tem
))
4141 next
= XWINDOW (tem
)->next
;
4142 delete_window (tem
);
4146 /* Delete any siblings that come after WINDOW.
4147 Note that if START is not WINDOW, then WINDOW still
4148 Fhas siblings, so WINDOW has not yet replaced its parent. */
4150 while (! EQ (tem
, window
))
4152 next
= XWINDOW (tem
)->next
;
4153 delete_window (tem
);
4159 /* Otherwise, make delta1 just right so that if we add
4160 delta1 lines to this window and to the parent, and then
4161 shrink the parent back to its original size, the new
4162 proportional size of this window will increase by delta.
4164 The function size_window will compute the new height h'
4165 of the window from delta1 as:
4168 x = delta1 - delta1/n * n for the 1st resizable child
4171 where n is the number of children that can be resized.
4172 We can ignore x by choosing a delta1 that is a multiple of
4173 n. We want the height of this window to come out as
4183 The number of children n equals the number of resizable
4184 children of this window + 1 because we know window itself
4185 is resizable (otherwise we would have signalled an error). */
4187 struct window
*w
= XWINDOW (window
);
4191 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
4192 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
4194 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
4195 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
4200 /* Add delta1 lines or columns to this window, and to the parent,
4201 keeping things consistent while not affecting siblings. */
4202 XSETINT (CURSIZE (parent
), opht
+ delta1
);
4203 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
4205 /* Squeeze out delta1 lines or columns from our parent,
4206 shriking this window and siblings proportionately.
4207 This brings parent back to correct size.
4208 Delta1 was calculated so this makes this window the desired size,
4209 taking it all out of the siblings. */
4210 (*setsizefun
) (parent
, opht
, 0);
4215 XSETFASTINT (p
->last_modified
, 0);
4216 XSETFASTINT (p
->last_overlay_modified
, 0);
4218 /* Adjust glyph matrices. */
4219 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4227 /***********************************************************************
4228 Resizing Mini-Windows
4229 ***********************************************************************/
4231 static void shrink_window_lowest_first
P_ ((struct window
*, int));
4233 enum save_restore_action
4240 static int save_restore_orig_size
P_ ((struct window
*,
4241 enum save_restore_action
));
4243 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
4244 from lowest windows first. */
4247 shrink_window_lowest_first (w
, height
)
4255 xassert (!MINI_WINDOW_P (w
));
4257 /* Set redisplay hints. */
4258 XSETFASTINT (w
->last_modified
, 0);
4259 XSETFASTINT (w
->last_overlay_modified
, 0);
4260 windows_or_buffers_changed
++;
4261 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
4263 old_height
= XFASTINT (w
->total_lines
);
4264 XSETFASTINT (w
->total_lines
, height
);
4266 if (!NILP (w
->hchild
))
4268 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
4270 c
= XWINDOW (child
);
4271 c
->top_line
= w
->top_line
;
4272 shrink_window_lowest_first (c
, height
);
4275 else if (!NILP (w
->vchild
))
4277 Lisp_Object last_child
;
4278 int delta
= old_height
- height
;
4283 /* Find the last child. We are taking space from lowest windows
4284 first, so we iterate over children from the last child
4286 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
4289 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
4290 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
4294 c
= XWINDOW (child
);
4295 this_one
= XFASTINT (c
->total_lines
) - MIN_SAFE_WINDOW_HEIGHT
;
4297 if (this_one
> delta
)
4300 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
) - this_one
);
4304 /* Compute new positions. */
4305 last_top
= XINT (w
->top_line
);
4306 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
4308 c
= XWINDOW (child
);
4309 c
->top_line
= make_number (last_top
);
4310 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
));
4311 last_top
+= XFASTINT (c
->total_lines
);
4317 /* Save, restore, or check positions and sizes in the window tree
4318 rooted at W. ACTION says what to do.
4320 If ACTION is CHECK_ORIG_SIZES, check if orig_top_line and
4321 orig_total_lines members are valid for all windows in the window
4322 tree. Value is non-zero if they are valid.
4324 If ACTION is SAVE_ORIG_SIZES, save members top and height in
4325 orig_top_line and orig_total_lines for all windows in the tree.
4327 If ACTION is RESTORE_ORIG_SIZES, restore top and height from values
4328 stored in orig_top_line and orig_total_lines for all windows. */
4331 save_restore_orig_size (w
, action
)
4333 enum save_restore_action action
;
4339 if (!NILP (w
->hchild
))
4341 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
4344 else if (!NILP (w
->vchild
))
4346 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
4352 case CHECK_ORIG_SIZES
:
4353 if (!INTEGERP (w
->orig_top_line
) || !INTEGERP (w
->orig_total_lines
))
4357 case SAVE_ORIG_SIZES
:
4358 w
->orig_top_line
= w
->top_line
;
4359 w
->orig_total_lines
= w
->total_lines
;
4360 XSETFASTINT (w
->last_modified
, 0);
4361 XSETFASTINT (w
->last_overlay_modified
, 0);
4364 case RESTORE_ORIG_SIZES
:
4365 xassert (INTEGERP (w
->orig_top_line
) && INTEGERP (w
->orig_total_lines
));
4366 w
->top_line
= w
->orig_top_line
;
4367 w
->total_lines
= w
->orig_total_lines
;
4368 w
->orig_total_lines
= w
->orig_top_line
= Qnil
;
4369 XSETFASTINT (w
->last_modified
, 0);
4370 XSETFASTINT (w
->last_overlay_modified
, 0);
4377 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
4384 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
4385 without deleting other windows. */
4388 grow_mini_window (w
, delta
)
4392 struct frame
*f
= XFRAME (w
->frame
);
4393 struct window
*root
;
4395 xassert (MINI_WINDOW_P (w
));
4396 xassert (delta
>= 0);
4398 /* Check values of window_min_width and window_min_height for
4400 check_min_window_sizes ();
4402 /* Compute how much we can enlarge the mini-window without deleting
4404 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4407 int min_height
= window_min_size (root
, 0, 0, 0);
4408 if (XFASTINT (root
->total_lines
) - delta
< min_height
)
4409 /* Note that the root window may already be smaller than
4411 delta
= max (0, XFASTINT (root
->total_lines
) - min_height
);
4416 /* Save original window sizes and positions, if not already done. */
4417 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4418 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
4420 /* Shrink other windows. */
4421 shrink_window_lowest_first (root
, XFASTINT (root
->total_lines
) - delta
);
4423 /* Grow the mini-window. */
4424 w
->top_line
= make_number (XFASTINT (root
->top_line
) + XFASTINT (root
->total_lines
));
4425 w
->total_lines
= make_number (XFASTINT (w
->total_lines
) + delta
);
4426 XSETFASTINT (w
->last_modified
, 0);
4427 XSETFASTINT (w
->last_overlay_modified
, 0);
4434 /* Shrink mini-window W. If there is recorded info about window sizes
4435 before a call to grow_mini_window, restore recorded window sizes.
4436 Otherwise, if the mini-window is higher than 1 line, resize it to 1
4440 shrink_mini_window (w
)
4443 struct frame
*f
= XFRAME (w
->frame
);
4444 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4446 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4448 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
4450 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4451 windows_or_buffers_changed
= 1;
4453 else if (XFASTINT (w
->total_lines
) > 1)
4455 /* Distribute the additional lines of the mini-window
4456 among the other windows. */
4458 XSETWINDOW (window
, w
);
4459 enlarge_window (window
, 1 - XFASTINT (w
->total_lines
), 0, 0);
4465 /* Mark window cursors off for all windows in the window tree rooted
4466 at W by setting their phys_cursor_on_p flag to zero. Called from
4467 xterm.c, e.g. when a frame is cleared and thereby all cursors on
4468 the frame are cleared. */
4471 mark_window_cursors_off (w
)
4476 if (!NILP (w
->hchild
))
4477 mark_window_cursors_off (XWINDOW (w
->hchild
));
4478 else if (!NILP (w
->vchild
))
4479 mark_window_cursors_off (XWINDOW (w
->vchild
));
4481 w
->phys_cursor_on_p
= 0;
4483 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4488 /* Return number of lines of text (not counting mode lines) in W. */
4491 window_internal_height (w
)
4494 int ht
= XFASTINT (w
->total_lines
);
4496 if (!MINI_WINDOW_P (w
))
4498 if (!NILP (w
->parent
)
4499 || !NILP (w
->vchild
)
4500 || !NILP (w
->hchild
)
4503 || WINDOW_WANTS_MODELINE_P (w
))
4506 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4514 /* Return the number of columns in W.
4515 Don't count columns occupied by scroll bars or the vertical bar
4516 separating W from the sibling to its right. */
4519 window_box_text_cols (w
)
4522 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4523 int width
= XINT (w
->total_cols
);
4525 if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w
))
4526 /* Scroll bars occupy a few columns. */
4527 width
-= WINDOW_CONFIG_SCROLL_BAR_COLS (w
);
4528 else if (!FRAME_WINDOW_P (f
)
4529 && !WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
4530 /* The column of `|' characters separating side-by-side windows
4531 occupies one column only. */
4534 if (FRAME_WINDOW_P (f
))
4535 /* On window-systems, fringes and display margins cannot be
4536 used for normal text. */
4537 width
-= (WINDOW_FRINGE_COLS (w
)
4538 + WINDOW_LEFT_MARGIN_COLS (w
)
4539 + WINDOW_RIGHT_MARGIN_COLS (w
));
4545 /************************************************************************
4547 ***********************************************************************/
4549 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
4550 N screen-fulls, which is defined as the height of the window minus
4551 next_screen_context_lines. If WHOLE is zero, scroll up N lines
4552 instead. Negative values of N mean scroll down. NOERROR non-zero
4553 means don't signal an error if we try to move over BEGV or ZV,
4557 window_scroll (window
, n
, whole
, noerror
)
4565 /* If we must, use the pixel-based version which is much slower than
4566 the line-based one but can handle varying line heights. */
4567 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
4568 window_scroll_pixel_based (window
, n
, whole
, noerror
);
4570 window_scroll_line_based (window
, n
, whole
, noerror
);
4576 /* Implementation of window_scroll that works based on pixel line
4577 heights. See the comment of window_scroll for parameter
4581 window_scroll_pixel_based (window
, n
, whole
, noerror
)
4588 struct window
*w
= XWINDOW (window
);
4589 struct text_pos start
;
4591 int this_scroll_margin
;
4593 /* True if we fiddled the window vscroll field without really scrolling. */
4596 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4598 /* If PT is not visible in WINDOW, move back one half of
4599 the screen. Allow PT to be partially visible, otherwise
4600 something like (scroll-down 1) with PT in the line before
4601 the partially visible one would recenter. */
4602 tem
= Fpos_visible_in_window_p (make_number (PT
), window
, Qt
);
4605 /* Move backward half the height of the window. Performance note:
4606 vmotion used here is about 10% faster, but would give wrong
4607 results for variable height lines. */
4608 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4609 it
.current_y
= it
.last_visible_y
;
4610 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
4612 /* The function move_iterator_vertically may move over more than
4613 the specified y-distance. If it->w is small, e.g. a
4614 mini-buffer window, we may end up in front of the window's
4615 display area. This is the case when Start displaying at the
4616 start of the line containing PT in this case. */
4617 if (it
.current_y
<= 0)
4619 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4620 move_it_vertically_backward (&it
, 0);
4624 start
= it
.current
.pos
;
4626 else if (auto_window_vscroll_p
)
4628 if (tem
= XCAR (XCDR (XCDR (tem
))), CONSP (tem
))
4631 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4633 dy
= max ((window_box_height (w
)
4634 - next_screen_context_lines
* dy
),
4638 if (n
< 0 && (px
= XINT (XCAR (tem
))) > 0)
4640 px
= max (0, -w
->vscroll
- min (px
, -dy
));
4641 Fset_window_vscroll (window
, make_number (px
), Qt
);
4644 if (n
> 0 && (px
= XINT (XCDR (tem
))) > 0)
4646 px
= max (0, -w
->vscroll
+ min (px
, dy
));
4647 Fset_window_vscroll (window
, make_number (px
), Qt
);
4651 Fset_window_vscroll (window
, make_number (0), Qt
);
4654 /* If scroll_preserve_screen_position is non-nil, we try to set
4655 point in the same window line as it is now, so get that line. */
4656 if (!NILP (Vscroll_preserve_screen_position
))
4658 start_display (&it
, w
, start
);
4659 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4660 preserve_y
= it
.current_y
;
4665 /* Move iterator it from start the specified distance forward or
4666 backward. The result is the new window start. */
4667 start_display (&it
, w
, start
);
4670 int start_pos
= IT_CHARPOS (it
);
4671 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4672 dy
= max ((window_box_height (w
)
4673 - next_screen_context_lines
* dy
),
4676 /* Note that move_it_vertically always moves the iterator to the
4677 start of a line. So, if the last line doesn't have a newline,
4678 we would end up at the start of the line ending at ZV. */
4681 move_it_vertically_backward (&it
, -dy
);
4682 /* Ensure we actually does move, e.g. in case we are currently
4683 looking at an image that is taller that the window height. */
4684 while (start_pos
== IT_CHARPOS (it
)
4685 && start_pos
> BEGV
)
4686 move_it_by_lines (&it
, -1, 1);
4690 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
4691 MOVE_TO_POS
| MOVE_TO_Y
);
4692 /* Ensure we actually does move, e.g. in case we are currently
4693 looking at an image that is taller that the window height. */
4694 while (start_pos
== IT_CHARPOS (it
)
4696 move_it_by_lines (&it
, 1, 1);
4700 move_it_by_lines (&it
, n
, 1);
4702 /* We failed if we find ZV is already on the screen (scrolling up,
4703 means there's nothing past the end), or if we can't start any
4704 earlier (scrolling down, means there's nothing past the top). */
4705 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
4706 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
4708 if (IT_CHARPOS (it
) == ZV
)
4710 if (it
.current_y
< it
.last_visible_y
4711 && (it
.current_y
+ it
.max_ascent
+ it
.max_descent
4712 >= it
.last_visible_y
))
4714 /* The last line was only partially visible, make it fully
4716 w
->vscroll
= (it
.last_visible_y
4717 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4718 adjust_glyphs (it
.f
);
4723 Fsignal (Qend_of_buffer
, Qnil
);
4727 if (w
->vscroll
!= 0)
4728 /* The first line was only partially visible, make it fully
4734 Fsignal (Qbeginning_of_buffer
, Qnil
);
4737 /* If control gets here, then we vscrolled. */
4739 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4741 /* Don't try to change the window start below. */
4747 int pos
= IT_CHARPOS (it
);
4750 /* If in the middle of a multi-glyph character move forward to
4751 the next character. */
4752 if (in_display_vector_p (&it
))
4755 move_it_to (&it
, pos
, -1, -1, -1, MOVE_TO_POS
);
4758 /* Set the window start, and set up the window for redisplay. */
4759 set_marker_restricted (w
->start
, make_number (pos
),
4761 bytepos
= XMARKER (w
->start
)->bytepos
;
4762 w
->start_at_line_beg
= ((pos
== BEGV
|| FETCH_BYTE (bytepos
- 1) == '\n')
4764 w
->update_mode_line
= Qt
;
4765 XSETFASTINT (w
->last_modified
, 0);
4766 XSETFASTINT (w
->last_overlay_modified
, 0);
4767 /* Set force_start so that redisplay_window will run the
4768 window-scroll-functions. */
4769 w
->force_start
= Qt
;
4772 /* The rest of this function uses current_y in a nonstandard way,
4773 not including the height of the header line if any. */
4774 it
.current_y
= it
.vpos
= 0;
4776 /* Move PT out of scroll margins.
4777 This code wants current_y to be zero at the window start position
4778 even if there is a header line. */
4779 this_scroll_margin
= max (0, scroll_margin
);
4780 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->total_lines
) / 4);
4781 this_scroll_margin
*= FRAME_LINE_HEIGHT (it
.f
);
4785 /* We moved the window start towards ZV, so PT may be now
4786 in the scroll margin at the top. */
4787 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4788 if (IT_CHARPOS (it
) == PT
&& it
.current_y
>= this_scroll_margin
4789 && (NILP (Vscroll_preserve_screen_position
)
4790 || EQ (Vscroll_preserve_screen_position
, Qt
)))
4791 /* We found PT at a legitimate height. Leave it alone. */
4793 else if (preserve_y
>= 0)
4795 /* If we have a header line, take account of it.
4796 This is necessary because we set it.current_y to 0, above. */
4797 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4798 preserve_y
-= CURRENT_HEADER_LINE_HEIGHT (w
);
4800 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4801 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4805 while (it
.current_y
< this_scroll_margin
)
4807 int prev
= it
.current_y
;
4808 move_it_by_lines (&it
, 1, 1);
4809 if (prev
== it
.current_y
)
4812 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4817 int charpos
, bytepos
;
4820 /* Save our position, for the preserve_y case. */
4821 charpos
= IT_CHARPOS (it
);
4822 bytepos
= IT_BYTEPOS (it
);
4824 /* We moved the window start towards BEGV, so PT may be now
4825 in the scroll margin at the bottom. */
4826 move_it_to (&it
, PT
, -1,
4827 (it
.last_visible_y
- CURRENT_HEADER_LINE_HEIGHT (w
)
4828 - this_scroll_margin
- 1),
4830 MOVE_TO_POS
| MOVE_TO_Y
);
4832 /* Save our position, in case it's correct. */
4833 charpos
= IT_CHARPOS (it
);
4834 bytepos
= IT_BYTEPOS (it
);
4836 /* See if point is on a partially visible line at the end. */
4837 if (it
.what
== IT_EOB
)
4838 partial_p
= it
.current_y
+ it
.ascent
+ it
.descent
> it
.last_visible_y
;
4841 move_it_by_lines (&it
, 1, 1);
4842 partial_p
= it
.current_y
> it
.last_visible_y
;
4845 if (charpos
== PT
&& !partial_p
4846 && (NILP (Vscroll_preserve_screen_position
)
4847 || EQ (Vscroll_preserve_screen_position
, Qt
)))
4848 /* We found PT before we found the display margin, so PT is ok. */
4850 else if (preserve_y
>= 0)
4852 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4853 start_display (&it
, w
, start
);
4854 #if 0 /* It's wrong to subtract this here
4855 because we called start_display again
4856 and did not alter it.current_y this time. */
4858 /* If we have a header line, take account of it. */
4859 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4860 preserve_y
-= CURRENT_HEADER_LINE_HEIGHT (w
);
4863 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4864 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4869 /* The last line was only partially visible, so back up two
4870 lines to make sure we're on a fully visible line. */
4872 move_it_by_lines (&it
, -2, 0);
4873 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4876 /* No, the position we saved is OK, so use it. */
4877 SET_PT_BOTH (charpos
, bytepos
);
4883 /* Implementation of window_scroll that works based on screen lines.
4884 See the comment of window_scroll for parameter descriptions. */
4887 window_scroll_line_based (window
, n
, whole
, noerror
)
4893 register struct window
*w
= XWINDOW (window
);
4894 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4895 register int pos
, pos_byte
;
4896 register int ht
= window_internal_height (w
);
4897 register Lisp_Object tem
;
4901 struct position posit
;
4904 /* If scrolling screen-fulls, compute the number of lines to
4905 scroll from the window's height. */
4907 n
*= max (1, ht
- next_screen_context_lines
);
4909 startpos
= marker_position (w
->start
);
4911 posit
= *compute_motion (startpos
, 0, 0, 0,
4913 -1, XINT (w
->hscroll
),
4915 original_vpos
= posit
.vpos
;
4917 XSETFASTINT (tem
, PT
);
4918 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4922 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4927 lose
= n
< 0 && PT
== BEGV
;
4928 Fvertical_motion (make_number (n
), window
);
4932 SET_PT_BOTH (opoint
, opoint_byte
);
4939 Fsignal (Qbeginning_of_buffer
, Qnil
);
4944 int this_scroll_margin
= scroll_margin
;
4946 /* Don't use a scroll margin that is negative or too large. */
4947 if (this_scroll_margin
< 0)
4948 this_scroll_margin
= 0;
4950 if (XINT (w
->total_lines
) < 4 * scroll_margin
)
4951 this_scroll_margin
= XINT (w
->total_lines
) / 4;
4953 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4954 w
->start_at_line_beg
= bolp
;
4955 w
->update_mode_line
= Qt
;
4956 XSETFASTINT (w
->last_modified
, 0);
4957 XSETFASTINT (w
->last_overlay_modified
, 0);
4958 /* Set force_start so that redisplay_window will run
4959 the window-scroll-functions. */
4960 w
->force_start
= Qt
;
4962 if (!NILP (Vscroll_preserve_screen_position
)
4963 && (whole
|| !EQ (Vscroll_preserve_screen_position
, Qt
)))
4965 SET_PT_BOTH (pos
, pos_byte
);
4966 Fvertical_motion (make_number (original_vpos
), window
);
4968 /* If we scrolled forward, put point enough lines down
4969 that it is outside the scroll margin. */
4974 if (this_scroll_margin
> 0)
4976 SET_PT_BOTH (pos
, pos_byte
);
4977 Fvertical_motion (make_number (this_scroll_margin
), window
);
4983 if (top_margin
<= opoint
)
4984 SET_PT_BOTH (opoint
, opoint_byte
);
4985 else if (!NILP (Vscroll_preserve_screen_position
))
4987 SET_PT_BOTH (pos
, pos_byte
);
4988 Fvertical_motion (make_number (original_vpos
), window
);
4991 SET_PT (top_margin
);
4997 /* If we scrolled backward, put point near the end of the window
4998 but not within the scroll margin. */
4999 SET_PT_BOTH (pos
, pos_byte
);
5000 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
5001 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
5004 bottom_margin
= PT
+ 1;
5006 if (bottom_margin
> opoint
)
5007 SET_PT_BOTH (opoint
, opoint_byte
);
5010 if (!NILP (Vscroll_preserve_screen_position
))
5012 SET_PT_BOTH (pos
, pos_byte
);
5013 Fvertical_motion (make_number (original_vpos
), window
);
5016 Fvertical_motion (make_number (-1), window
);
5025 Fsignal (Qend_of_buffer
, Qnil
);
5030 /* Scroll selected_window up or down. If N is nil, scroll a
5031 screen-full which is defined as the height of the window minus
5032 next_screen_context_lines. If N is the symbol `-', scroll.
5033 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
5034 up. This is the guts of Fscroll_up and Fscroll_down. */
5037 scroll_command (n
, direction
)
5041 int count
= SPECPDL_INDEX ();
5043 xassert (abs (direction
) == 1);
5045 /* If selected window's buffer isn't current, make it current for
5046 the moment. But don't screw up if window_scroll gets an error. */
5047 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
5049 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5050 Fset_buffer (XWINDOW (selected_window
)->buffer
);
5052 /* Make redisplay consider other windows than just selected_window. */
5053 ++windows_or_buffers_changed
;
5057 window_scroll (selected_window
, direction
, 1, 0);
5058 else if (EQ (n
, Qminus
))
5059 window_scroll (selected_window
, -direction
, 1, 0);
5062 n
= Fprefix_numeric_value (n
);
5063 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
5066 unbind_to (count
, Qnil
);
5069 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
5070 doc
: /* Scroll text of current window upward ARG lines.
5071 If ARG is omitted or nil, scroll upward by a near full screen.
5072 A near full screen is `next-screen-context-lines' less than a full screen.
5073 Negative ARG means scroll downward.
5074 If ARG is the atom `-', scroll downward by nearly full screen.
5075 When calling from a program, supply as argument a number, nil, or `-'. */)
5079 scroll_command (arg
, 1);
5083 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
5084 doc
: /* Scroll text of current window down ARG lines.
5085 If ARG is omitted or nil, scroll down by a near full screen.
5086 A near full screen is `next-screen-context-lines' less than a full screen.
5087 Negative ARG means scroll upward.
5088 If ARG is the atom `-', scroll upward by nearly full screen.
5089 When calling from a program, supply as argument a number, nil, or `-'. */)
5093 scroll_command (arg
, -1);
5097 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
5098 doc
: /* Return the other window for \"other window scroll\" commands.
5099 If `other-window-scroll-buffer' is non-nil, a window
5100 showing that buffer is used.
5101 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5102 specifies the window. This takes precedence over
5103 `other-window-scroll-buffer'. */)
5108 if (MINI_WINDOW_P (XWINDOW (selected_window
))
5109 && !NILP (Vminibuf_scroll_window
))
5110 window
= Vminibuf_scroll_window
;
5111 /* If buffer is specified, scroll that buffer. */
5112 else if (!NILP (Vother_window_scroll_buffer
))
5114 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
5116 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
5120 /* Nothing specified; look for a neighboring window on the same
5122 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
5124 if (EQ (window
, selected_window
))
5125 /* That didn't get us anywhere; look for a window on another
5128 window
= Fnext_window (window
, Qnil
, Qt
);
5129 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
5130 && ! EQ (window
, selected_window
));
5133 CHECK_LIVE_WINDOW (window
);
5135 if (EQ (window
, selected_window
))
5136 error ("There is no other window");
5141 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
5142 doc
: /* Scroll next window upward ARG lines; or near full screen if no ARG.
5143 A near full screen is `next-screen-context-lines' less than a full screen.
5144 The next window is the one below the current one; or the one at the top
5145 if the current one is at the bottom. Negative ARG means scroll downward.
5146 If ARG is the atom `-', scroll downward by nearly full screen.
5147 When calling from a program, supply as argument a number, nil, or `-'.
5149 If `other-window-scroll-buffer' is non-nil, scroll the window
5150 showing that buffer, popping the buffer up if necessary.
5151 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5152 specifies the window to scroll. This takes precedence over
5153 `other-window-scroll-buffer'. */)
5159 int count
= SPECPDL_INDEX ();
5161 window
= Fother_window_for_scrolling ();
5162 w
= XWINDOW (window
);
5164 /* Don't screw up if window_scroll gets an error. */
5165 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5166 ++windows_or_buffers_changed
;
5168 Fset_buffer (w
->buffer
);
5169 SET_PT (marker_position (w
->pointm
));
5172 window_scroll (window
, 1, 1, 1);
5173 else if (EQ (arg
, Qminus
))
5174 window_scroll (window
, -1, 1, 1);
5180 window_scroll (window
, XINT (arg
), 0, 1);
5183 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
5184 unbind_to (count
, Qnil
);
5189 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 2, "P\np",
5190 doc
: /* Scroll selected window display ARG columns left.
5191 Default for ARG is window width minus 2.
5192 Value is the total amount of leftward horizontal scrolling in
5193 effect after the change.
5194 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5195 lower bound for automatic scrolling, i.e. automatic scrolling
5196 will not scroll a window to a column less than the value returned
5197 by this function. This happens in an interactive call. */)
5199 register Lisp_Object arg
, set_minimum
;
5203 struct window
*w
= XWINDOW (selected_window
);
5206 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5208 arg
= Fprefix_numeric_value (arg
);
5210 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
5211 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5213 if (!NILP (set_minimum
))
5214 w
->min_hscroll
= w
->hscroll
;
5219 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 2, "P\np",
5220 doc
: /* Scroll selected window display ARG columns right.
5221 Default for ARG is window width minus 2.
5222 Value is the total amount of leftward horizontal scrolling in
5223 effect after the change.
5224 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5225 lower bound for automatic scrolling, i.e. automatic scrolling
5226 will not scroll a window to a column less than the value returned
5227 by this function. This happens in an interactive call. */)
5229 register Lisp_Object arg
, set_minimum
;
5233 struct window
*w
= XWINDOW (selected_window
);
5236 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5238 arg
= Fprefix_numeric_value (arg
);
5240 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
5241 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5243 if (!NILP (set_minimum
))
5244 w
->min_hscroll
= w
->hscroll
;
5249 DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window
, Sminibuffer_selected_window
, 0, 0, 0,
5250 doc
: /* Return the window which was selected when entering the minibuffer.
5251 Returns nil, if current window is not a minibuffer window. */)
5254 if (minibuf_level
> 0
5255 && MINI_WINDOW_P (XWINDOW (selected_window
))
5256 && WINDOW_LIVE_P (minibuf_selected_window
))
5257 return minibuf_selected_window
;
5262 /* Value is the number of lines actually displayed in window W,
5263 as opposed to its height. */
5266 displayed_window_lines (w
)
5270 struct text_pos start
;
5271 int height
= window_box_height (w
);
5272 struct buffer
*old_buffer
;
5275 if (XBUFFER (w
->buffer
) != current_buffer
)
5277 old_buffer
= current_buffer
;
5278 set_buffer_internal (XBUFFER (w
->buffer
));
5283 /* In case W->start is out of the accessible range, do something
5284 reasonable. This happens in Info mode when Info-scroll-down
5285 calls (recenter -1) while W->start is 1. */
5286 if (XMARKER (w
->start
)->charpos
< BEGV
)
5287 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
5288 else if (XMARKER (w
->start
)->charpos
> ZV
)
5289 SET_TEXT_POS (start
, ZV
, ZV_BYTE
);
5291 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5293 start_display (&it
, w
, start
);
5294 move_it_vertically (&it
, height
);
5295 bottom_y
= line_bottom_y (&it
);
5297 /* rms: On a non-window display,
5298 the value of it.vpos at the bottom of the screen
5299 seems to be 1 larger than window_box_height (w).
5300 This kludge fixes a bug whereby (move-to-window-line -1)
5301 when ZV is on the last screen line
5302 moves to the previous screen line instead of the last one. */
5303 if (! FRAME_WINDOW_P (XFRAME (w
->frame
)))
5306 /* Add in empty lines at the bottom of the window. */
5307 if (bottom_y
< height
)
5309 int uy
= FRAME_LINE_HEIGHT (it
.f
);
5310 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
5314 set_buffer_internal (old_buffer
);
5320 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
5321 doc
: /* Center point in window and redisplay frame.
5322 With prefix argument ARG, recenter putting point on screen line ARG
5323 relative to the current window. If ARG is negative, it counts up from the
5324 bottom of the window. (ARG should be less than the height of the window.)
5326 If ARG is omitted or nil, erase the entire frame and then
5327 redraw with point in the center of the current window.
5328 Just C-u as prefix means put point in the center of the window
5329 and redisplay normally--don't erase and redraw the frame. */)
5331 register Lisp_Object arg
;
5333 struct window
*w
= XWINDOW (selected_window
);
5334 struct buffer
*buf
= XBUFFER (w
->buffer
);
5335 struct buffer
*obuf
= current_buffer
;
5337 int charpos
, bytepos
;
5339 int this_scroll_margin
;
5341 /* If redisplay is suppressed due to an error, try again. */
5342 obuf
->display_error_modiff
= 0;
5348 /* Invalidate pixel data calculated for all compositions. */
5349 for (i
= 0; i
< n_compositions
; i
++)
5350 composition_table
[i
]->font
= NULL
;
5352 Fredraw_frame (w
->frame
);
5353 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
5356 else if (CONSP (arg
)) /* Just C-u. */
5360 arg
= Fprefix_numeric_value (arg
);
5365 set_buffer_internal (buf
);
5367 /* Do this after making BUF current
5368 in case scroll_margin is buffer-local. */
5369 this_scroll_margin
= max (0, scroll_margin
);
5370 this_scroll_margin
= min (this_scroll_margin
,
5371 XFASTINT (w
->total_lines
) / 4);
5373 /* Handle centering on a graphical frame specially. Such frames can
5374 have variable-height lines and centering point on the basis of
5375 line counts would lead to strange effects. */
5376 if (FRAME_WINDOW_P (XFRAME (w
->frame
)))
5383 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5384 start_display (&it
, w
, pt
);
5385 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
5386 charpos
= IT_CHARPOS (it
);
5387 bytepos
= IT_BYTEPOS (it
);
5394 int extra_line_spacing
;
5395 int h
= window_box_height (w
);
5397 iarg
= - max (-iarg
, this_scroll_margin
);
5399 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5400 start_display (&it
, w
, pt
);
5402 /* Be sure we have the exact height of the full line containing PT. */
5403 move_it_by_lines (&it
, 0, 1);
5405 /* The amount of pixels we have to move back is the window
5406 height minus what's displayed in the line containing PT,
5407 and the lines below. */
5410 move_it_by_lines (&it
, nlines
, 1);
5412 if (it
.vpos
== nlines
)
5416 /* Last line has no newline */
5417 h
-= line_bottom_y (&it
);
5421 /* Don't reserve space for extra line spacing of last line. */
5422 extra_line_spacing
= it
.max_extra_line_spacing
;
5424 /* If we can't move down NLINES lines because we hit
5425 the end of the buffer, count in some empty lines. */
5426 if (it
.vpos
< nlines
)
5429 extra_line_spacing
= it
.extra_line_spacing
;
5430 h
-= nlines
* (FRAME_LINE_HEIGHT (it
.f
) + extra_line_spacing
);
5435 /* Now find the new top line (starting position) of the window. */
5436 start_display (&it
, w
, pt
);
5438 move_it_vertically_backward (&it
, h
);
5440 /* If extra line spacing is present, we may move too far
5441 back. This causes the last line to be only partially
5442 visible (which triggers redisplay to recenter that line
5443 in the middle), so move forward.
5444 But ignore extra line spacing on last line, as it is not
5445 considered to be part of the visible height of the line.
5447 h
+= extra_line_spacing
;
5448 while (-it
.current_y
> h
)
5449 move_it_by_lines (&it
, 1, 1);
5451 charpos
= IT_CHARPOS (it
);
5452 bytepos
= IT_BYTEPOS (it
);
5456 struct position pos
;
5458 iarg
= max (iarg
, this_scroll_margin
);
5460 pos
= *vmotion (PT
, -iarg
, w
);
5461 charpos
= pos
.bufpos
;
5462 bytepos
= pos
.bytepos
;
5467 struct position pos
;
5468 int ht
= window_internal_height (w
);
5475 /* Don't let it get into the margin at either top or bottom. */
5476 iarg
= max (iarg
, this_scroll_margin
);
5477 iarg
= min (iarg
, ht
- this_scroll_margin
- 1);
5479 pos
= *vmotion (PT
, - iarg
, w
);
5480 charpos
= pos
.bufpos
;
5481 bytepos
= pos
.bytepos
;
5484 /* Set the new window start. */
5485 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
5486 w
->window_end_valid
= Qnil
;
5488 w
->optional_new_start
= Qt
;
5490 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
5491 w
->start_at_line_beg
= Qt
;
5493 w
->start_at_line_beg
= Qnil
;
5495 set_buffer_internal (obuf
);
5500 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
5502 doc
: /* Return the height in lines of the text display area of WINDOW.
5503 This doesn't include the mode-line (or header-line if any) or any
5504 partial-height lines in the text display area. */)
5508 struct window
*w
= decode_window (window
);
5509 int pixel_height
= window_box_height (w
);
5510 int line_height
= pixel_height
/ FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
5511 return make_number (line_height
);
5516 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
5518 doc
: /* Position point relative to window.
5519 With no argument, position point at center of window.
5520 An argument specifies vertical position within the window;
5521 zero means top of window, negative means relative to bottom of window. */)
5525 struct window
*w
= XWINDOW (selected_window
);
5529 int this_scroll_margin
;
5532 window
= selected_window
;
5533 start
= marker_position (w
->start
);
5534 if (start
< BEGV
|| start
> ZV
)
5536 int height
= window_internal_height (w
);
5537 Fvertical_motion (make_number (- (height
/ 2)), window
);
5538 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
5539 w
->start_at_line_beg
= Fbolp ();
5540 w
->force_start
= Qt
;
5543 Fgoto_char (w
->start
);
5545 lines
= displayed_window_lines (w
);
5548 this_scroll_margin
= max (0, scroll_margin
);
5549 this_scroll_margin
= min (this_scroll_margin
, lines
/ 4);
5553 XSETFASTINT (arg
, lines
/ 2);
5556 int iarg
= XINT (Fprefix_numeric_value (arg
));
5559 iarg
= iarg
+ lines
;
5561 #if 0 /* This code would prevent move-to-window-line from moving point
5562 to a place inside the scroll margins (which would cause the
5563 next redisplay to scroll). I wrote this code, but then concluded
5564 it is probably better not to install it. However, it is here
5565 inside #if 0 so as not to lose it. -- rms. */
5567 /* Don't let it get into the margin at either top or bottom. */
5568 iarg
= max (iarg
, this_scroll_margin
);
5569 iarg
= min (iarg
, lines
- this_scroll_margin
- 1);
5572 arg
= make_number (iarg
);
5575 /* Skip past a partially visible first line. */
5577 XSETINT (arg
, XINT (arg
) + 1);
5579 return Fvertical_motion (arg
, window
);
5584 /***********************************************************************
5585 Window Configuration
5586 ***********************************************************************/
5588 struct save_window_data
5590 EMACS_INT size_from_Lisp_Vector_struct
;
5591 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
5592 Lisp_Object frame_cols
, frame_lines
, frame_menu_bar_lines
;
5593 Lisp_Object frame_tool_bar_lines
;
5594 Lisp_Object selected_frame
;
5595 Lisp_Object current_window
;
5596 Lisp_Object current_buffer
;
5597 Lisp_Object minibuf_scroll_window
;
5598 Lisp_Object minibuf_selected_window
;
5599 Lisp_Object root_window
;
5600 Lisp_Object focus_frame
;
5601 /* Record the values of window-min-width and window-min-height
5602 so that window sizes remain consistent with them. */
5603 Lisp_Object min_width
, min_height
;
5604 /* A vector, each of whose elements is a struct saved_window
5606 Lisp_Object saved_windows
;
5609 /* This is saved as a Lisp_Vector */
5612 /* these first two must agree with struct Lisp_Vector in lisp.h */
5613 EMACS_INT size_from_Lisp_Vector_struct
;
5614 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
5617 Lisp_Object buffer
, start
, pointm
, mark
;
5618 Lisp_Object left_col
, top_line
, total_cols
, total_lines
;
5619 Lisp_Object hscroll
, min_hscroll
;
5620 Lisp_Object parent
, prev
;
5621 Lisp_Object start_at_line_beg
;
5622 Lisp_Object display_table
;
5623 Lisp_Object orig_top_line
, orig_total_lines
;
5624 Lisp_Object left_margin_cols
, right_margin_cols
;
5625 Lisp_Object left_fringe_width
, right_fringe_width
, fringes_outside_margins
;
5626 Lisp_Object scroll_bar_width
, vertical_scroll_bar_type
;
5629 #define SAVED_WINDOW_N(swv,n) \
5630 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
5632 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
5633 doc
: /* Return t if OBJECT is a window-configuration object. */)
5637 if (WINDOW_CONFIGURATIONP (object
))
5642 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
5643 doc
: /* Return the frame that CONFIG, a window-configuration object, is about. */)
5647 register struct save_window_data
*data
;
5648 struct Lisp_Vector
*saved_windows
;
5650 if (! WINDOW_CONFIGURATIONP (config
))
5651 wrong_type_argument (Qwindow_configuration_p
, config
);
5653 data
= (struct save_window_data
*) XVECTOR (config
);
5654 saved_windows
= XVECTOR (data
->saved_windows
);
5655 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5658 DEFUN ("set-window-configuration", Fset_window_configuration
,
5659 Sset_window_configuration
, 1, 1, 0,
5660 doc
: /* Set the configuration of windows and buffers as specified by CONFIGURATION.
5661 CONFIGURATION must be a value previously returned
5662 by `current-window-configuration' (which see).
5663 If CONFIGURATION was made from a frame that is now deleted,
5664 only frame-independent values can be restored. In this case,
5665 the return value is nil. Otherwise the value is t. */)
5667 Lisp_Object configuration
;
5669 register struct save_window_data
*data
;
5670 struct Lisp_Vector
*saved_windows
;
5671 Lisp_Object new_current_buffer
;
5676 while (!WINDOW_CONFIGURATIONP (configuration
))
5677 wrong_type_argument (Qwindow_configuration_p
, configuration
);
5679 data
= (struct save_window_data
*) XVECTOR (configuration
);
5680 saved_windows
= XVECTOR (data
->saved_windows
);
5682 new_current_buffer
= data
->current_buffer
;
5683 if (NILP (XBUFFER (new_current_buffer
)->name
))
5684 new_current_buffer
= Qnil
;
5687 if (XBUFFER (new_current_buffer
) == current_buffer
)
5690 /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of
5691 point in new_current_buffer as of the last time this buffer was
5692 used. This can be non-deterministic since it can be changed by
5693 things like jit-lock by mere temporary selection of some random
5694 window that happens to show this buffer.
5695 So if possible we want this arbitrary choice of "which point" to
5696 be the one from the to-be-selected-window so as to prevent this
5697 window's cursor from being copied from another window. */
5698 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
5699 /* If current_window = selected_window, its point is in BUF_PT. */
5700 && !EQ (selected_window
, data
->current_window
))
5701 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
5703 old_point
= BUF_PT (XBUFFER (new_current_buffer
));
5706 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5709 /* If f is a dead frame, don't bother rebuilding its window tree.
5710 However, there is other stuff we should still try to do below. */
5711 if (FRAME_LIVE_P (f
))
5713 register struct window
*w
;
5714 register struct saved_window
*p
;
5715 struct window
*root_window
;
5716 struct window
**leaf_windows
;
5720 /* If the frame has been resized since this window configuration was
5721 made, we change the frame to the size specified in the
5722 configuration, restore the configuration, and then resize it
5723 back. We keep track of the prevailing height in these variables. */
5724 int previous_frame_lines
= FRAME_LINES (f
);
5725 int previous_frame_cols
= FRAME_COLS (f
);
5726 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
5727 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
5729 /* The mouse highlighting code could get screwed up
5730 if it runs during this. */
5733 if (XFASTINT (data
->frame_lines
) != previous_frame_lines
5734 || XFASTINT (data
->frame_cols
) != previous_frame_cols
)
5735 change_frame_size (f
, XFASTINT (data
->frame_lines
),
5736 XFASTINT (data
->frame_cols
), 0, 0, 0);
5737 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5738 if (XFASTINT (data
->frame_menu_bar_lines
)
5739 != previous_frame_menu_bar_lines
)
5740 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
5741 #ifdef HAVE_WINDOW_SYSTEM
5742 if (XFASTINT (data
->frame_tool_bar_lines
)
5743 != previous_frame_tool_bar_lines
)
5744 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
5748 /* "Swap out" point from the selected window's buffer
5749 into the window itself. (Normally the pointm of the selected
5750 window holds garbage.) We do this now, before
5751 restoring the window contents, and prevent it from
5752 being done later on when we select a new window. */
5753 if (! NILP (XWINDOW (selected_window
)->buffer
))
5755 w
= XWINDOW (selected_window
);
5756 set_marker_both (w
->pointm
,
5758 BUF_PT (XBUFFER (w
->buffer
)),
5759 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5762 windows_or_buffers_changed
++;
5763 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
5765 /* Problem: Freeing all matrices and later allocating them again
5766 is a serious redisplay flickering problem. What we would
5767 really like to do is to free only those matrices not reused
5769 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
5771 = (struct window
**) alloca (count_windows (root_window
)
5772 * sizeof (struct window
*));
5773 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
5775 /* Temporarily avoid any problems with windows that are smaller
5776 than they are supposed to be. */
5777 window_min_height
= 1;
5778 window_min_width
= 1;
5781 Mark all windows now on frame as "deleted".
5782 Restoring the new configuration "undeletes" any that are in it.
5784 Save their current buffers in their height fields, since we may
5785 need it later, if a buffer saved in the configuration is now
5787 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5789 for (k
= 0; k
< saved_windows
->size
; k
++)
5791 p
= SAVED_WINDOW_N (saved_windows
, k
);
5792 w
= XWINDOW (p
->window
);
5795 if (!NILP (p
->parent
))
5796 w
->parent
= SAVED_WINDOW_N (saved_windows
,
5797 XFASTINT (p
->parent
))->window
;
5801 if (!NILP (p
->prev
))
5803 w
->prev
= SAVED_WINDOW_N (saved_windows
,
5804 XFASTINT (p
->prev
))->window
;
5805 XWINDOW (w
->prev
)->next
= p
->window
;
5810 if (!NILP (w
->parent
))
5812 if (EQ (p
->total_cols
, XWINDOW (w
->parent
)->total_cols
))
5814 XWINDOW (w
->parent
)->vchild
= p
->window
;
5815 XWINDOW (w
->parent
)->hchild
= Qnil
;
5819 XWINDOW (w
->parent
)->hchild
= p
->window
;
5820 XWINDOW (w
->parent
)->vchild
= Qnil
;
5825 /* If we squirreled away the buffer in the window's height,
5827 if (BUFFERP (w
->total_lines
))
5828 w
->buffer
= w
->total_lines
;
5829 w
->left_col
= p
->left_col
;
5830 w
->top_line
= p
->top_line
;
5831 w
->total_cols
= p
->total_cols
;
5832 w
->total_lines
= p
->total_lines
;
5833 w
->hscroll
= p
->hscroll
;
5834 w
->min_hscroll
= p
->min_hscroll
;
5835 w
->display_table
= p
->display_table
;
5836 w
->orig_top_line
= p
->orig_top_line
;
5837 w
->orig_total_lines
= p
->orig_total_lines
;
5838 w
->left_margin_cols
= p
->left_margin_cols
;
5839 w
->right_margin_cols
= p
->right_margin_cols
;
5840 w
->left_fringe_width
= p
->left_fringe_width
;
5841 w
->right_fringe_width
= p
->right_fringe_width
;
5842 w
->fringes_outside_margins
= p
->fringes_outside_margins
;
5843 w
->scroll_bar_width
= p
->scroll_bar_width
;
5844 w
->vertical_scroll_bar_type
= p
->vertical_scroll_bar_type
;
5845 XSETFASTINT (w
->last_modified
, 0);
5846 XSETFASTINT (w
->last_overlay_modified
, 0);
5848 /* Reinstall the saved buffer and pointers into it. */
5849 if (NILP (p
->buffer
))
5850 w
->buffer
= p
->buffer
;
5853 if (!NILP (XBUFFER (p
->buffer
)->name
))
5854 /* If saved buffer is alive, install it. */
5856 w
->buffer
= p
->buffer
;
5857 w
->start_at_line_beg
= p
->start_at_line_beg
;
5858 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
5859 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
5860 Fset_marker (XBUFFER (w
->buffer
)->mark
,
5861 p
->mark
, w
->buffer
);
5863 /* As documented in Fcurrent_window_configuration, don't
5864 restore the location of point in the buffer which was
5865 current when the window configuration was recorded. */
5866 if (!EQ (p
->buffer
, new_current_buffer
)
5867 && XBUFFER (p
->buffer
) == current_buffer
)
5868 Fgoto_char (w
->pointm
);
5870 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
5871 /* Else unless window has a live buffer, get one. */
5873 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
5874 /* This will set the markers to beginning of visible
5876 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
5877 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
5878 w
->start_at_line_beg
= Qt
;
5881 /* Keeping window's old buffer; make sure the markers
5884 /* Set window markers at start of visible range. */
5885 if (XMARKER (w
->start
)->buffer
== 0)
5886 set_marker_restricted (w
->start
, make_number (0),
5888 if (XMARKER (w
->pointm
)->buffer
== 0)
5889 set_marker_restricted_both (w
->pointm
, w
->buffer
,
5890 BUF_PT (XBUFFER (w
->buffer
)),
5891 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5892 w
->start_at_line_beg
= Qt
;
5897 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
5898 /* Prevent "swapping out point" in the old selected window
5899 using the buffer that has been restored into it.
5900 We already swapped out point that from that window's old buffer. */
5901 selected_window
= Qnil
;
5903 /* Arrange *not* to restore point in the buffer that was
5904 current when the window configuration was saved. */
5905 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
))
5906 set_marker_restricted (XWINDOW (data
->current_window
)->pointm
,
5907 make_number (old_point
),
5908 XWINDOW (data
->current_window
)->buffer
);
5910 Fselect_window (data
->current_window
, Qnil
);
5911 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
5914 if (NILP (data
->focus_frame
)
5915 || (FRAMEP (data
->focus_frame
)
5916 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
5917 Fredirect_frame_focus (frame
, data
->focus_frame
);
5919 #if 0 /* I don't understand why this is needed, and it causes problems
5920 when the frame's old selected window has been deleted. */
5921 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
5922 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
5926 /* Set the screen height to the value it had before this function. */
5927 if (previous_frame_lines
!= FRAME_LINES (f
)
5928 || previous_frame_cols
!= FRAME_COLS (f
))
5929 change_frame_size (f
, previous_frame_lines
, previous_frame_cols
,
5931 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5932 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
5933 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
5935 #ifdef HAVE_WINDOW_SYSTEM
5936 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
5937 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
5942 /* Now, free glyph matrices in windows that were not reused. */
5943 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
5945 if (NILP (leaf_windows
[i
]->buffer
))
5947 /* Assert it's not reused as a combination. */
5948 xassert (NILP (leaf_windows
[i
]->hchild
)
5949 && NILP (leaf_windows
[i
]->vchild
));
5950 free_window_matrices (leaf_windows
[i
]);
5952 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
5960 /* Fselect_window will have made f the selected frame, so we
5961 reselect the proper frame here. Fhandle_switch_frame will change the
5962 selected window too, but that doesn't make the call to
5963 Fselect_window above totally superfluous; it still sets f's
5965 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
5966 do_switch_frame (data
->selected_frame
, 0, 0);
5968 if (! NILP (Vwindow_configuration_change_hook
)
5969 && ! NILP (Vrun_hooks
))
5970 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
5973 if (!NILP (new_current_buffer
))
5974 Fset_buffer (new_current_buffer
);
5976 /* Restore the minimum heights recorded in the configuration. */
5977 window_min_height
= XINT (data
->min_height
);
5978 window_min_width
= XINT (data
->min_width
);
5980 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
5981 minibuf_selected_window
= data
->minibuf_selected_window
;
5983 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
5986 /* Mark all windows now on frame as deleted
5987 by setting their buffers to nil. */
5990 delete_all_subwindows (w
)
5991 register struct window
*w
;
5993 if (!NILP (w
->next
))
5994 delete_all_subwindows (XWINDOW (w
->next
));
5995 if (!NILP (w
->vchild
))
5996 delete_all_subwindows (XWINDOW (w
->vchild
));
5997 if (!NILP (w
->hchild
))
5998 delete_all_subwindows (XWINDOW (w
->hchild
));
6000 w
->total_lines
= w
->buffer
; /* See Fset_window_configuration for excuse. */
6002 if (!NILP (w
->buffer
))
6005 /* We set all three of these fields to nil, to make sure that we can
6006 distinguish this dead window from any live window. Live leaf
6007 windows will have buffer set, and combination windows will have
6008 vchild or hchild set. */
6013 Vwindow_list
= Qnil
;
6017 count_windows (window
)
6018 register struct window
*window
;
6020 register int count
= 1;
6021 if (!NILP (window
->next
))
6022 count
+= count_windows (XWINDOW (window
->next
));
6023 if (!NILP (window
->vchild
))
6024 count
+= count_windows (XWINDOW (window
->vchild
));
6025 if (!NILP (window
->hchild
))
6026 count
+= count_windows (XWINDOW (window
->hchild
));
6031 /* Fill vector FLAT with leaf windows under W, starting at index I.
6032 Value is last index + 1. */
6035 get_leaf_windows (w
, flat
, i
)
6037 struct window
**flat
;
6042 if (!NILP (w
->hchild
))
6043 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
6044 else if (!NILP (w
->vchild
))
6045 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
6049 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6056 /* Return a pointer to the glyph W's physical cursor is on. Value is
6057 null if W's current matrix is invalid, so that no meaningfull glyph
6061 get_phys_cursor_glyph (w
)
6064 struct glyph_row
*row
;
6065 struct glyph
*glyph
;
6067 if (w
->phys_cursor
.vpos
>= 0
6068 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
6069 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
6071 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
6072 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
6081 save_window_save (window
, vector
, i
)
6083 struct Lisp_Vector
*vector
;
6086 register struct saved_window
*p
;
6087 register struct window
*w
;
6088 register Lisp_Object tem
;
6090 for (;!NILP (window
); window
= w
->next
)
6092 p
= SAVED_WINDOW_N (vector
, i
);
6093 w
= XWINDOW (window
);
6095 XSETFASTINT (w
->temslot
, i
); i
++;
6097 p
->buffer
= w
->buffer
;
6098 p
->left_col
= w
->left_col
;
6099 p
->top_line
= w
->top_line
;
6100 p
->total_cols
= w
->total_cols
;
6101 p
->total_lines
= w
->total_lines
;
6102 p
->hscroll
= w
->hscroll
;
6103 p
->min_hscroll
= w
->min_hscroll
;
6104 p
->display_table
= w
->display_table
;
6105 p
->orig_top_line
= w
->orig_top_line
;
6106 p
->orig_total_lines
= w
->orig_total_lines
;
6107 p
->left_margin_cols
= w
->left_margin_cols
;
6108 p
->right_margin_cols
= w
->right_margin_cols
;
6109 p
->left_fringe_width
= w
->left_fringe_width
;
6110 p
->right_fringe_width
= w
->right_fringe_width
;
6111 p
->fringes_outside_margins
= w
->fringes_outside_margins
;
6112 p
->scroll_bar_width
= w
->scroll_bar_width
;
6113 p
->vertical_scroll_bar_type
= w
->vertical_scroll_bar_type
;
6114 if (!NILP (w
->buffer
))
6116 /* Save w's value of point in the window configuration.
6117 If w is the selected window, then get the value of point
6118 from the buffer; pointm is garbage in the selected window. */
6119 if (EQ (window
, selected_window
))
6121 p
->pointm
= Fmake_marker ();
6122 set_marker_both (p
->pointm
, w
->buffer
,
6123 BUF_PT (XBUFFER (w
->buffer
)),
6124 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6127 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
6129 p
->start
= Fcopy_marker (w
->start
, Qnil
);
6130 p
->start_at_line_beg
= w
->start_at_line_beg
;
6132 tem
= XBUFFER (w
->buffer
)->mark
;
6133 p
->mark
= Fcopy_marker (tem
, Qnil
);
6140 p
->start_at_line_beg
= Qnil
;
6143 if (NILP (w
->parent
))
6146 p
->parent
= XWINDOW (w
->parent
)->temslot
;
6151 p
->prev
= XWINDOW (w
->prev
)->temslot
;
6153 if (!NILP (w
->vchild
))
6154 i
= save_window_save (w
->vchild
, vector
, i
);
6155 if (!NILP (w
->hchild
))
6156 i
= save_window_save (w
->hchild
, vector
, i
);
6162 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
6163 Scurrent_window_configuration
, 0, 1, 0,
6164 doc
: /* Return an object representing the current window configuration of FRAME.
6165 If FRAME is nil or omitted, use the selected frame.
6166 This describes the number of windows, their sizes and current buffers,
6167 and for each displayed buffer, where display starts, and the positions of
6168 point and mark. An exception is made for point in the current buffer:
6169 its value is -not- saved.
6170 This also records the currently selected frame, and FRAME's focus
6171 redirection (see `redirect-frame-focus'). */)
6175 register Lisp_Object tem
;
6176 register int n_windows
;
6177 register struct save_window_data
*data
;
6178 register struct Lisp_Vector
*vec
;
6183 frame
= selected_frame
;
6184 CHECK_LIVE_FRAME (frame
);
6187 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6188 vec
= allocate_other_vector (VECSIZE (struct save_window_data
));
6189 data
= (struct save_window_data
*)vec
;
6191 XSETFASTINT (data
->frame_cols
, FRAME_COLS (f
));
6192 XSETFASTINT (data
->frame_lines
, FRAME_LINES (f
));
6193 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
6194 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
6195 data
->selected_frame
= selected_frame
;
6196 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
6197 XSETBUFFER (data
->current_buffer
, current_buffer
);
6198 data
->minibuf_scroll_window
= minibuf_level
> 0 ? Vminibuf_scroll_window
: Qnil
;
6199 data
->minibuf_selected_window
= minibuf_level
> 0 ? minibuf_selected_window
: Qnil
;
6200 data
->root_window
= FRAME_ROOT_WINDOW (f
);
6201 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
6202 XSETINT (data
->min_height
, window_min_height
);
6203 XSETINT (data
->min_width
, window_min_width
);
6204 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
6205 data
->saved_windows
= tem
;
6206 for (i
= 0; i
< n_windows
; i
++)
6207 XVECTOR (tem
)->contents
[i
]
6208 = Fmake_vector (make_number (VECSIZE (struct saved_window
)), Qnil
);
6209 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
6210 XSETWINDOW_CONFIGURATION (tem
, data
);
6214 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
6216 doc
: /* Execute BODY, preserving window sizes and contents.
6217 Return the value of the last form in BODY.
6218 Restore which buffer appears in which window, where display starts,
6219 and the value of point and mark for each window.
6220 Also restore the choice of selected window.
6221 Also restore which buffer is current.
6222 Does not restore the value of point in current buffer.
6223 usage: (save-window-excursion BODY ...) */)
6227 register Lisp_Object val
;
6228 register int count
= SPECPDL_INDEX ();
6230 record_unwind_protect (Fset_window_configuration
,
6231 Fcurrent_window_configuration (Qnil
));
6232 val
= Fprogn (args
);
6233 return unbind_to (count
, val
);
6237 /***********************************************************************
6239 ***********************************************************************/
6241 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
6243 doc
: /* Set width of marginal areas of window WINDOW.
6244 If WINDOW is nil, set margins of the currently selected window.
6245 Second arg LEFT-WIDTH specifies the number of character cells to
6246 reserve for the left marginal area. Optional third arg RIGHT-WIDTH
6247 does the same for the right marginal area. A nil width parameter
6248 means no margin. */)
6249 (window
, left_width
, right_width
)
6250 Lisp_Object window
, left_width
, right_width
;
6252 struct window
*w
= decode_window (window
);
6254 /* Translate negative or zero widths to nil.
6255 Margins that are too wide have to be checked elsewhere. */
6257 if (!NILP (left_width
))
6259 CHECK_NUMBER (left_width
);
6260 if (XINT (left_width
) <= 0)
6264 if (!NILP (right_width
))
6266 CHECK_NUMBER (right_width
);
6267 if (XINT (right_width
) <= 0)
6271 if (!EQ (w
->left_margin_cols
, left_width
)
6272 || !EQ (w
->right_margin_cols
, right_width
))
6274 w
->left_margin_cols
= left_width
;
6275 w
->right_margin_cols
= right_width
;
6277 adjust_window_margins (w
);
6279 ++windows_or_buffers_changed
;
6280 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6287 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
6289 doc
: /* Get width of marginal areas of window WINDOW.
6290 If WINDOW is omitted or nil, use the currently selected window.
6291 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).
6292 If a marginal area does not exist, its width will be returned
6297 struct window
*w
= decode_window (window
);
6298 return Fcons (w
->left_margin_cols
, w
->right_margin_cols
);
6303 /***********************************************************************
6305 ***********************************************************************/
6307 DEFUN ("set-window-fringes", Fset_window_fringes
, Sset_window_fringes
,
6309 doc
: /* Set the fringe widths of window WINDOW.
6310 If WINDOW is nil, set the fringe widths of the currently selected
6312 Second arg LEFT-WIDTH specifies the number of pixels to reserve for
6313 the left fringe. Optional third arg RIGHT-WIDTH specifies the right
6314 fringe width. If a fringe width arg is nil, that means to use the
6315 frame's default fringe width. Default fringe widths can be set with
6316 the command `set-fringe-style'.
6317 If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes
6318 outside of the display margins. By default, fringes are drawn between
6319 display marginal areas and the text area. */)
6320 (window
, left_width
, right_width
, outside_margins
)
6321 Lisp_Object window
, left_width
, right_width
, outside_margins
;
6323 struct window
*w
= decode_window (window
);
6325 if (!NILP (left_width
))
6326 CHECK_NATNUM (left_width
);
6327 if (!NILP (right_width
))
6328 CHECK_NATNUM (right_width
);
6330 if (!EQ (w
->left_fringe_width
, left_width
)
6331 || !EQ (w
->right_fringe_width
, right_width
)
6332 || !EQ (w
->fringes_outside_margins
, outside_margins
))
6334 w
->left_fringe_width
= left_width
;
6335 w
->right_fringe_width
= right_width
;
6336 w
->fringes_outside_margins
= outside_margins
;
6338 adjust_window_margins (w
);
6340 clear_glyph_matrix (w
->current_matrix
);
6341 w
->window_end_valid
= Qnil
;
6343 ++windows_or_buffers_changed
;
6344 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6351 DEFUN ("window-fringes", Fwindow_fringes
, Swindow_fringes
,
6353 doc
: /* Get width of fringes of window WINDOW.
6354 If WINDOW is omitted or nil, use the currently selected window.
6355 Value is a list of the form (LEFT-WIDTH RIGHT-WIDTH OUTSIDE-MARGINS). */)
6359 struct window
*w
= decode_window (window
);
6360 return Fcons (make_number (WINDOW_LEFT_FRINGE_WIDTH (w
)),
6361 Fcons (make_number (WINDOW_RIGHT_FRINGE_WIDTH (w
)),
6362 Fcons ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
) ?
6363 Qt
: Qnil
), Qnil
)));
6368 /***********************************************************************
6370 ***********************************************************************/
6372 DEFUN ("set-window-scroll-bars", Fset_window_scroll_bars
, Sset_window_scroll_bars
,
6374 doc
: /* Set width and type of scroll bars of window WINDOW.
6375 If window is nil, set scroll bars of the currently selected window.
6376 Second parameter WIDTH specifies the pixel width for the scroll bar;
6377 this is automatically adjusted to a multiple of the frame column width.
6378 Third parameter VERTICAL-TYPE specifies the type of the vertical scroll
6379 bar: left, right, or nil.
6380 If WIDTH is nil, use the frame's scroll-bar width.
6381 If TYPE is t, use the frame's scroll-bar type. */)
6382 (window
, width
, vertical_type
, horizontal_type
)
6383 Lisp_Object window
, width
, vertical_type
, horizontal_type
;
6385 struct window
*w
= decode_window (window
);
6389 CHECK_NATNUM (width
);
6391 if (XINT (width
) == 0)
6392 vertical_type
= Qnil
;
6395 if (!(EQ (vertical_type
, Qnil
)
6396 || EQ (vertical_type
, Qleft
)
6397 || EQ (vertical_type
, Qright
)
6398 || EQ (vertical_type
, Qt
)))
6399 error ("Invalid type of vertical scroll bar");
6401 if (!EQ (w
->scroll_bar_width
, width
)
6402 || !EQ (w
->vertical_scroll_bar_type
, vertical_type
))
6404 w
->scroll_bar_width
= width
;
6405 w
->vertical_scroll_bar_type
= vertical_type
;
6407 adjust_window_margins (w
);
6409 clear_glyph_matrix (w
->current_matrix
);
6410 w
->window_end_valid
= Qnil
;
6412 ++windows_or_buffers_changed
;
6413 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6420 DEFUN ("window-scroll-bars", Fwindow_scroll_bars
, Swindow_scroll_bars
,
6422 doc
: /* Get width and type of scroll bars of window WINDOW.
6423 If WINDOW is omitted or nil, use the currently selected window.
6424 Value is a list of the form (WIDTH COLS VERTICAL-TYPE HORIZONTAL-TYPE).
6425 If WIDTH is nil or TYPE is t, the window is using the frame's corresponding
6430 struct window
*w
= decode_window (window
);
6431 return Fcons (make_number ((WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6432 ? WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6433 : WINDOW_SCROLL_BAR_AREA_WIDTH (w
))),
6434 Fcons (make_number (WINDOW_SCROLL_BAR_COLS (w
)),
6435 Fcons (w
->vertical_scroll_bar_type
,
6436 Fcons (Qnil
, Qnil
))));
6441 /***********************************************************************
6443 ***********************************************************************/
6445 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 2, 0,
6446 doc
: /* Return the amount by which WINDOW is scrolled vertically.
6447 Use the selected window if WINDOW is nil or omitted.
6448 Normally, value is a multiple of the canonical character height of WINDOW;
6449 optional second arg PIXELS_P means value is measured in pixels. */)
6451 Lisp_Object window
, pixels_p
;
6458 window
= selected_window
;
6460 CHECK_WINDOW (window
);
6461 w
= XWINDOW (window
);
6462 f
= XFRAME (w
->frame
);
6464 if (FRAME_WINDOW_P (f
))
6465 result
= (NILP (pixels_p
)
6466 ? FRAME_CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
)
6467 : make_number (-w
->vscroll
));
6469 result
= make_number (0);
6474 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
6476 doc
: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL.
6477 WINDOW nil means use the selected window. Normally, VSCROLL is a
6478 non-negative multiple of the canonical character height of WINDOW;
6479 optional third arg PIXELS_P non-nil means that VSCROLL is in pixels.
6480 If PIXELS-P is nil, VSCROLL may have to be rounded so that it
6481 corresponds to an integral number of pixels. The return value is the
6482 result of this rounding.
6483 If PIXELS-P is non-nil, the return value is VSCROLL. */)
6484 (window
, vscroll
, pixels_p
)
6485 Lisp_Object window
, vscroll
, pixels_p
;
6491 window
= selected_window
;
6493 CHECK_WINDOW (window
);
6494 CHECK_NUMBER_OR_FLOAT (vscroll
);
6496 w
= XWINDOW (window
);
6497 f
= XFRAME (w
->frame
);
6499 if (FRAME_WINDOW_P (f
))
6501 int old_dy
= w
->vscroll
;
6503 w
->vscroll
= - (NILP (pixels_p
)
6504 ? FRAME_LINE_HEIGHT (f
) * XFLOATINT (vscroll
)
6505 : XFLOATINT (vscroll
));
6506 w
->vscroll
= min (w
->vscroll
, 0);
6508 if (w
->vscroll
!= old_dy
)
6510 /* Adjust glyph matrix of the frame if the virtual display
6511 area becomes larger than before. */
6512 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
6515 /* Prevent redisplay shortcuts. */
6516 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
6520 return Fwindow_vscroll (window
, pixels_p
);
6524 /* Call FN for all leaf windows on frame F. FN is called with the
6525 first argument being a pointer to the leaf window, and with
6526 additional argument USER_DATA. Stops when FN returns 0. */
6529 foreach_window (f
, fn
, user_data
)
6531 int (* fn
) P_ ((struct window
*, void *));
6534 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
6538 /* Helper function for foreach_window. Call FN for all leaf windows
6539 reachable from W. FN is called with the first argument being a
6540 pointer to the leaf window, and with additional argument USER_DATA.
6541 Stop when FN returns 0. Value is 0 if stopped by FN. */
6544 foreach_window_1 (w
, fn
, user_data
)
6546 int (* fn
) P_ ((struct window
*, void *));
6551 for (cont
= 1; w
&& cont
;)
6553 if (!NILP (w
->hchild
))
6554 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
6555 else if (!NILP (w
->vchild
))
6556 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
6558 cont
= fn (w
, user_data
);
6560 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6567 /* Freeze or unfreeze the window start of W unless it is a
6568 mini-window or the selected window. FREEZE_P non-null means freeze
6569 the window start. */
6572 freeze_window_start (w
, freeze_p
)
6576 if (w
== XWINDOW (selected_window
)
6577 || MINI_WINDOW_P (w
)
6578 || (MINI_WINDOW_P (XWINDOW (selected_window
))
6579 && ! NILP (Vminibuf_scroll_window
)
6580 && w
== XWINDOW (Vminibuf_scroll_window
)))
6583 w
->frozen_window_start_p
= freeze_p
!= NULL
;
6588 /* Freeze or unfreeze the window starts of all leaf windows on frame
6589 F, except the selected window and a mini-window. FREEZE_P non-zero
6590 means freeze the window start. */
6593 freeze_window_starts (f
, freeze_p
)
6597 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
6601 /***********************************************************************
6603 ***********************************************************************/
6605 /* Return 1 if window configurations C1 and C2
6606 describe the same state of affairs. This is used by Fequal. */
6609 compare_window_configurations (c1
, c2
, ignore_positions
)
6611 int ignore_positions
;
6613 register struct save_window_data
*d1
, *d2
;
6614 struct Lisp_Vector
*sw1
, *sw2
;
6617 if (!WINDOW_CONFIGURATIONP (c1
))
6618 wrong_type_argument (Qwindow_configuration_p
, c1
);
6619 if (!WINDOW_CONFIGURATIONP (c2
))
6620 wrong_type_argument (Qwindow_configuration_p
, c2
);
6622 d1
= (struct save_window_data
*) XVECTOR (c1
);
6623 d2
= (struct save_window_data
*) XVECTOR (c2
);
6624 sw1
= XVECTOR (d1
->saved_windows
);
6625 sw2
= XVECTOR (d2
->saved_windows
);
6627 if (! EQ (d1
->frame_cols
, d2
->frame_cols
))
6629 if (! EQ (d1
->frame_lines
, d2
->frame_lines
))
6631 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
6633 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
6635 /* Don't compare the current_window field directly.
6636 Instead see w1_is_current and w2_is_current, below. */
6637 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
6639 if (! ignore_positions
)
6641 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
6643 if (! EQ (d1
->minibuf_selected_window
, d2
->minibuf_selected_window
))
6646 /* Don't compare the root_window field.
6647 We don't require the two configurations
6648 to use the same window object,
6649 and the two root windows must be equivalent
6650 if everything else compares equal. */
6651 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
6653 if (! EQ (d1
->min_width
, d2
->min_width
))
6655 if (! EQ (d1
->min_height
, d2
->min_height
))
6658 /* Verify that the two confis have the same number of windows. */
6659 if (sw1
->size
!= sw2
->size
)
6662 for (i
= 0; i
< sw1
->size
; i
++)
6664 struct saved_window
*p1
, *p2
;
6665 int w1_is_current
, w2_is_current
;
6667 p1
= SAVED_WINDOW_N (sw1
, i
);
6668 p2
= SAVED_WINDOW_N (sw2
, i
);
6670 /* Verify that the current windows in the two
6671 configurations correspond to each other. */
6672 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
6673 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
6675 if (w1_is_current
!= w2_is_current
)
6678 /* Verify that the corresponding windows do match. */
6679 if (! EQ (p1
->buffer
, p2
->buffer
))
6681 if (! EQ (p1
->left_col
, p2
->left_col
))
6683 if (! EQ (p1
->top_line
, p2
->top_line
))
6685 if (! EQ (p1
->total_cols
, p2
->total_cols
))
6687 if (! EQ (p1
->total_lines
, p2
->total_lines
))
6689 if (! EQ (p1
->display_table
, p2
->display_table
))
6691 if (! EQ (p1
->parent
, p2
->parent
))
6693 if (! EQ (p1
->prev
, p2
->prev
))
6695 if (! ignore_positions
)
6697 if (! EQ (p1
->hscroll
, p2
->hscroll
))
6699 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
6701 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
6703 if (NILP (Fequal (p1
->start
, p2
->start
)))
6705 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
6707 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
6710 if (! EQ (p1
->left_margin_cols
, p2
->left_margin_cols
))
6712 if (! EQ (p1
->right_margin_cols
, p2
->right_margin_cols
))
6714 if (! EQ (p1
->left_fringe_width
, p2
->left_fringe_width
))
6716 if (! EQ (p1
->right_fringe_width
, p2
->right_fringe_width
))
6718 if (! EQ (p1
->fringes_outside_margins
, p2
->fringes_outside_margins
))
6720 if (! EQ (p1
->scroll_bar_width
, p2
->scroll_bar_width
))
6722 if (! EQ (p1
->vertical_scroll_bar_type
, p2
->vertical_scroll_bar_type
))
6729 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
6730 Scompare_window_configurations
, 2, 2, 0,
6731 doc
: /* Compare two window configurations as regards the structure of windows.
6732 This function ignores details such as the values of point and mark
6733 and scrolling positions. */)
6737 if (compare_window_configurations (x
, y
, 1))
6745 struct frame
*f
= make_initial_frame ();
6746 XSETFRAME (selected_frame
, f
);
6747 Vterminal_frame
= selected_frame
;
6748 minibuf_window
= f
->minibuffer_window
;
6749 selected_window
= f
->selected_window
;
6750 last_nonminibuf_frame
= f
;
6752 window_initialized
= 1;
6758 Vwindow_list
= Qnil
;
6764 Qwindow_size_fixed
= intern ("window-size-fixed");
6765 staticpro (&Qwindow_size_fixed
);
6766 Fset (Qwindow_size_fixed
, Qnil
);
6768 staticpro (&Qwindow_configuration_change_hook
);
6769 Qwindow_configuration_change_hook
6770 = intern ("window-configuration-change-hook");
6772 Qwindowp
= intern ("windowp");
6773 staticpro (&Qwindowp
);
6775 Qwindow_configuration_p
= intern ("window-configuration-p");
6776 staticpro (&Qwindow_configuration_p
);
6778 Qwindow_live_p
= intern ("window-live-p");
6779 staticpro (&Qwindow_live_p
);
6781 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
6782 staticpro (&Qtemp_buffer_show_hook
);
6784 staticpro (&Vwindow_list
);
6786 minibuf_selected_window
= Qnil
;
6787 staticpro (&minibuf_selected_window
);
6789 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
6790 doc
: /* Non-nil means call as function to display a help buffer.
6791 The function is called with one argument, the buffer to be displayed.
6792 Used by `with-output-to-temp-buffer'.
6793 If this function is used, then it must do the entire job of showing
6794 the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */);
6795 Vtemp_buffer_show_function
= Qnil
;
6797 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
6798 doc
: /* If non-nil, function to call to handle `display-buffer'.
6799 It will receive two args, the buffer and a flag which if non-nil means
6800 that the currently selected window is not acceptable.
6801 It should choose or create a window, display the specified buffer in it,
6802 and return the window.
6803 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'
6804 work using this function. */);
6805 Vdisplay_buffer_function
= Qnil
;
6807 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
6808 doc
: /* *If non-nil, `display-buffer' should even the window heights.
6809 If nil, `display-buffer' will leave the window configuration alone. */);
6810 Veven_window_heights
= Qt
;
6812 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
6813 doc
: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */);
6814 Vminibuf_scroll_window
= Qnil
;
6816 DEFVAR_BOOL ("mode-line-in-non-selected-windows", &mode_line_in_non_selected_windows
,
6817 doc
: /* Non-nil means to use `mode-line-inactive' face in non-selected windows.
6818 If the minibuffer is active, the `minibuffer-scroll-window' mode line
6819 is displayed in the `mode-line' face. */);
6820 mode_line_in_non_selected_windows
= 1;
6822 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
6823 doc
: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */);
6824 Vother_window_scroll_buffer
= Qnil
;
6826 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
6827 doc
: /* *Non-nil means `display-buffer' should make a separate frame. */);
6830 DEFVAR_BOOL ("auto-window-vscroll", &auto_window_vscroll_p
,
6831 doc
: /* *Non-nil means to automatically adjust `window-vscroll' to view tall lines. */);
6832 auto_window_vscroll_p
= 1;
6834 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
6835 doc
: /* *Non-nil means `display-buffer' should reuse frames.
6836 If the buffer in question is already displayed in a frame, raise that frame. */);
6837 display_buffer_reuse_frames
= 0;
6839 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
6840 doc
: /* Function to call to handle automatic new frame creation.
6841 It is called with no arguments and should return a newly created frame.
6843 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'
6844 where `pop-up-frame-alist' would hold the default frame parameters. */);
6845 Vpop_up_frame_function
= Qnil
;
6847 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
6848 doc
: /* *List of buffer names that should have their own special frames.
6849 Displaying a buffer with `display-buffer' or `pop-to-buffer',
6850 if its name is in this list, makes a special frame for it
6851 using `special-display-function'. See also `special-display-regexps'.
6853 An element of the list can be a list instead of just a string.
6854 There are two ways to use a list as an element:
6855 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)
6856 In the first case, the FRAME-PARAMETERS are pairs of the form
6857 \(PARAMETER . VALUE); these parameter values are used to create the frame.
6858 In the second case, FUNCTION is called with BUFFER as the first argument,
6859 followed by the OTHER-ARGS--it can display BUFFER in any way it likes.
6860 All this is done by the function found in `special-display-function'.
6862 If the specified frame parameters include (same-buffer . t), the
6863 buffer is displayed in the currently selected window. Otherwise, if
6864 they include (same-frame . t), the buffer is displayed in a new window
6865 in the currently selected frame.
6867 If this variable appears \"not to work\", because you add a name to it
6868 but that buffer still appears in the selected window, look at the
6869 values of `same-window-buffer-names' and `same-window-regexps'.
6870 Those variables take precedence over this one. */);
6871 Vspecial_display_buffer_names
= Qnil
;
6873 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
6874 doc
: /* *List of regexps saying which buffers should have their own special frames.
6875 When displaying a buffer with `display-buffer' or `pop-to-buffer',
6876 if any regexp in this list matches the buffer name, it makes a
6877 special frame for the buffer by calling `special-display-function'.
6879 An element of the list can be a list instead of just a string.
6880 There are two ways to use a list as an element:
6881 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)
6882 In the first case, the FRAME-PARAMETERS are pairs of the form
6883 \(PARAMETER . VALUE); these parameter values are used to create the frame.
6884 In the second case, FUNCTION is called with BUFFER as the first argument,
6885 followed by the OTHER-ARGS--it can display the buffer in any way it likes.
6886 All this is done by the function found in `special-display-function'.
6888 If the specified frame parameters include (same-buffer . t), the
6889 buffer is displayed in the currently selected window. Otherwise, if
6890 they include (same-frame . t), the buffer is displayed in a new window
6891 in the currently selected frame.
6893 If this variable appears \"not to work\", because you add a regexp to it
6894 but the matching buffers still appear in the selected window, look at the
6895 values of `same-window-buffer-names' and `same-window-regexps'.
6896 Those variables take precedence over this one. */);
6897 Vspecial_display_regexps
= Qnil
;
6899 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
6900 doc
: /* Function to call to make a new frame for a special buffer.
6901 It is called with two arguments, the buffer and optional buffer specific
6902 data, and should return a window displaying that buffer.
6903 The default value normally makes a separate frame for the buffer,
6904 using `special-display-frame-alist' to specify the frame parameters.
6905 But if the buffer specific data includes (same-buffer . t) then the
6906 buffer is displayed in the current selected window.
6907 Otherwise if it includes (same-frame . t) then the buffer is displayed in
6908 a new window in the currently selected frame.
6910 A buffer is special if it is listed in `special-display-buffer-names'
6911 or matches a regexp in `special-display-regexps'. */);
6912 Vspecial_display_function
= Qnil
;
6914 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
6915 doc
: /* *List of buffer names that should appear in the selected window.
6916 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'
6917 switches to it in the selected window, rather than making it appear
6918 in some other window.
6920 An element of the list can be a cons cell instead of just a string.
6921 Then the car must be a string, which specifies the buffer name.
6922 This is for compatibility with `special-display-buffer-names';
6923 the cdr of the cons cell is ignored.
6925 See also `same-window-regexps'. */);
6926 Vsame_window_buffer_names
= Qnil
;
6928 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
6929 doc
: /* *List of regexps saying which buffers should appear in the selected window.
6930 If a buffer name matches one of these regexps, then displaying it
6931 using `display-buffer' or `pop-to-buffer' switches to it
6932 in the selected window, rather than making it appear in some other window.
6934 An element of the list can be a cons cell instead of just a string.
6935 Then the car must be a string, which specifies the buffer name.
6936 This is for compatibility with `special-display-buffer-names';
6937 the cdr of the cons cell is ignored.
6939 See also `same-window-buffer-names'. */);
6940 Vsame_window_regexps
= Qnil
;
6942 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
6943 doc
: /* *Non-nil means display-buffer should make new windows. */);
6946 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
6947 doc
: /* *Number of lines of continuity when scrolling by screenfuls. */);
6948 next_screen_context_lines
= 2;
6950 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
6951 doc
: /* *A window must be at least this tall to be eligible for splitting by `display-buffer'.
6952 If there is only one window, it is split regardless of this value. */);
6953 split_height_threshold
= 500;
6955 DEFVAR_INT ("window-min-height", &window_min_height
,
6956 doc
: /* *Delete any window less than this tall (including its mode line). */);
6957 window_min_height
= 4;
6959 DEFVAR_INT ("window-min-width", &window_min_width
,
6960 doc
: /* *Delete any window less than this wide. */);
6961 window_min_width
= 10;
6963 DEFVAR_LISP ("scroll-preserve-screen-position",
6964 &Vscroll_preserve_screen_position
,
6965 doc
: /* *Controls if scroll commands move point to keep its screen line unchanged.
6966 A value of nil means point does not keep its screen position except
6967 at the scroll margin or window boundary respectively.
6968 A value of t means point keeps its screen position if the scroll
6969 command moved it vertically out of the window, e.g. when scrolling
6971 Any other value means point always keeps its screen position. */);
6972 Vscroll_preserve_screen_position
= Qnil
;
6974 DEFVAR_LISP ("window-configuration-change-hook",
6975 &Vwindow_configuration_change_hook
,
6976 doc
: /* Functions to call when window configuration changes.
6977 The selected frame is the one whose configuration has changed. */);
6978 Vwindow_configuration_change_hook
= Qnil
;
6980 defsubr (&Sselected_window
);
6981 defsubr (&Sminibuffer_window
);
6982 defsubr (&Swindow_minibuffer_p
);
6983 defsubr (&Swindowp
);
6984 defsubr (&Swindow_live_p
);
6985 defsubr (&Spos_visible_in_window_p
);
6986 defsubr (&Swindow_buffer
);
6987 defsubr (&Swindow_height
);
6988 defsubr (&Swindow_width
);
6989 defsubr (&Swindow_hscroll
);
6990 defsubr (&Sset_window_hscroll
);
6991 defsubr (&Swindow_redisplay_end_trigger
);
6992 defsubr (&Sset_window_redisplay_end_trigger
);
6993 defsubr (&Swindow_edges
);
6994 defsubr (&Swindow_pixel_edges
);
6995 defsubr (&Swindow_inside_edges
);
6996 defsubr (&Swindow_inside_pixel_edges
);
6997 defsubr (&Scoordinates_in_window_p
);
6998 defsubr (&Swindow_at
);
6999 defsubr (&Swindow_point
);
7000 defsubr (&Swindow_start
);
7001 defsubr (&Swindow_end
);
7002 defsubr (&Sset_window_point
);
7003 defsubr (&Sset_window_start
);
7004 defsubr (&Swindow_dedicated_p
);
7005 defsubr (&Sset_window_dedicated_p
);
7006 defsubr (&Swindow_display_table
);
7007 defsubr (&Sset_window_display_table
);
7008 defsubr (&Snext_window
);
7009 defsubr (&Sprevious_window
);
7010 defsubr (&Sother_window
);
7011 defsubr (&Sget_lru_window
);
7012 defsubr (&Sget_largest_window
);
7013 defsubr (&Sget_buffer_window
);
7014 defsubr (&Sdelete_other_windows
);
7015 defsubr (&Sdelete_windows_on
);
7016 defsubr (&Sreplace_buffer_in_windows
);
7017 defsubr (&Sdelete_window
);
7018 defsubr (&Sset_window_buffer
);
7019 defsubr (&Sselect_window
);
7020 defsubr (&Sspecial_display_p
);
7021 defsubr (&Ssame_window_p
);
7022 defsubr (&Sdisplay_buffer
);
7023 defsubr (&Sforce_window_update
);
7024 defsubr (&Ssplit_window
);
7025 defsubr (&Senlarge_window
);
7026 defsubr (&Sshrink_window
);
7027 defsubr (&Sscroll_up
);
7028 defsubr (&Sscroll_down
);
7029 defsubr (&Sscroll_left
);
7030 defsubr (&Sscroll_right
);
7031 defsubr (&Sother_window_for_scrolling
);
7032 defsubr (&Sscroll_other_window
);
7033 defsubr (&Sminibuffer_selected_window
);
7034 defsubr (&Srecenter
);
7035 defsubr (&Swindow_text_height
);
7036 defsubr (&Smove_to_window_line
);
7037 defsubr (&Swindow_configuration_p
);
7038 defsubr (&Swindow_configuration_frame
);
7039 defsubr (&Sset_window_configuration
);
7040 defsubr (&Scurrent_window_configuration
);
7041 defsubr (&Ssave_window_excursion
);
7042 defsubr (&Sset_window_margins
);
7043 defsubr (&Swindow_margins
);
7044 defsubr (&Sset_window_fringes
);
7045 defsubr (&Swindow_fringes
);
7046 defsubr (&Sset_window_scroll_bars
);
7047 defsubr (&Swindow_scroll_bars
);
7048 defsubr (&Swindow_vscroll
);
7049 defsubr (&Sset_window_vscroll
);
7050 defsubr (&Scompare_window_configurations
);
7051 defsubr (&Swindow_list
);
7057 initial_define_key (control_x_map
, '1', "delete-other-windows");
7058 initial_define_key (control_x_map
, '2', "split-window");
7059 initial_define_key (control_x_map
, '0', "delete-window");
7060 initial_define_key (control_x_map
, 'o', "other-window");
7061 initial_define_key (control_x_map
, '^', "enlarge-window");
7062 initial_define_key (control_x_map
, '<', "scroll-left");
7063 initial_define_key (control_x_map
, '>', "scroll-right");
7065 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
7066 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
7067 initial_define_key (meta_map
, 'v', "scroll-down");
7069 initial_define_key (global_map
, Ctl('L'), "recenter");
7070 initial_define_key (meta_map
, 'r', "move-to-window-line");
7073 /* arch-tag: 90a9c576-0590-48f1-a5f1-6c96a0452d9f
7074 (do not change this comment) */