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., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
34 #include "dispextern.h"
35 #include "blockinput.h"
36 #include "intervals.h"
40 #endif /* HAVE_X_WINDOWS */
52 Lisp_Object Qwindowp
, Qwindow_live_p
, Qwindow_configuration_p
;
53 Lisp_Object Qwindow_size_fixed
;
54 extern Lisp_Object Qleft_margin
, Qright_margin
;
56 static int displayed_window_lines
P_ ((struct window
*));
57 static struct window
*decode_window
P_ ((Lisp_Object
));
58 static int count_windows
P_ ((struct window
*));
59 static int get_leaf_windows
P_ ((struct window
*, struct window
**, int));
60 static void window_scroll
P_ ((Lisp_Object
, int, int, int));
61 static void window_scroll_pixel_based
P_ ((Lisp_Object
, int, int, int));
62 static void window_scroll_line_based
P_ ((Lisp_Object
, int, int, int));
63 static int window_min_size_1
P_ ((struct window
*, int));
64 static int window_min_size
P_ ((struct window
*, int, int, int *));
65 static void size_window
P_ ((Lisp_Object
, int, int, int));
66 static int freeze_window_start
P_ ((struct window
*, void *));
67 static int window_fixed_size_p
P_ ((struct window
*, int, int));
68 static void enlarge_window
P_ ((Lisp_Object
, int, int, int));
69 static Lisp_Object window_list
P_ ((void));
70 static int add_window_to_list
P_ ((struct window
*, void *));
71 static int candidate_window_p
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
,
73 static Lisp_Object next_window
P_ ((Lisp_Object
, Lisp_Object
,
75 static void decode_next_window_args
P_ ((Lisp_Object
*, Lisp_Object
*,
77 static int foreach_window_1
P_ ((struct window
*,
78 int (* fn
) (struct window
*, void *),
80 static Lisp_Object window_list_1
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
));
82 /* This is the window in which the terminal's cursor should
83 be left when nothing is being done with it. This must
84 always be a leaf window, and its buffer is selected by
85 the top level editing loop at the end of each command.
87 This value is always the same as
88 FRAME_SELECTED_WINDOW (selected_frame). */
90 Lisp_Object selected_window
;
92 /* A list of all windows for use by next_window and Fwindow_list.
93 Functions creating or deleting windows should invalidate this cache
94 by setting it to nil. */
96 Lisp_Object Vwindow_list
;
98 /* The mini-buffer window of the selected frame.
99 Note that you cannot test for mini-bufferness of an arbitrary window
100 by comparing against this; but you can test for mini-bufferness of
101 the selected window. */
103 Lisp_Object minibuf_window
;
105 /* Non-nil means it is the window whose mode line should be
106 shown as the selected window when the minibuffer is selected. */
108 Lisp_Object minibuf_selected_window
;
110 /* Non-nil means it is the window for C-M-v to scroll
111 when the mini-buffer is selected. */
113 Lisp_Object Vminibuf_scroll_window
;
115 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
117 Lisp_Object Vother_window_scroll_buffer
;
119 /* Non-nil means it's function to call to display temp buffers. */
121 Lisp_Object Vtemp_buffer_show_function
;
123 /* Non-zero means line and page scrolling on tall lines (with images)
124 does partial scrolling by modifying window-vscroll. */
126 int auto_window_vscroll_p
;
128 /* Non-zero means to use mode-line-inactive face in all windows but the
129 selected-window and the minibuffer-scroll-window when the
130 minibuffer is active. */
131 int mode_line_in_non_selected_windows
;
133 /* If a window gets smaller than either of these, it is removed. */
135 EMACS_INT window_min_height
;
136 EMACS_INT window_min_width
;
138 /* Nonzero implies Fdisplay_buffer should create windows. */
142 /* Nonzero implies make new frames for Fdisplay_buffer. */
146 /* Nonzero means reuse existing frames for displaying buffers. */
148 int display_buffer_reuse_frames
;
150 /* Non-nil means use this function instead of default */
152 Lisp_Object Vpop_up_frame_function
;
154 /* Function to call to handle Fdisplay_buffer. */
156 Lisp_Object Vdisplay_buffer_function
;
158 /* Non-nil means that Fdisplay_buffer should even the heights of windows. */
160 Lisp_Object Veven_window_heights
;
162 /* List of buffer *names* for buffers that should have their own frames. */
164 Lisp_Object Vspecial_display_buffer_names
;
166 /* List of regexps for buffer names that should have their own frames. */
168 Lisp_Object Vspecial_display_regexps
;
170 /* Function to pop up a special frame. */
172 Lisp_Object Vspecial_display_function
;
174 /* List of buffer *names* for buffers to appear in selected window. */
176 Lisp_Object Vsame_window_buffer_names
;
178 /* List of regexps for buffer names to appear in selected window. */
180 Lisp_Object Vsame_window_regexps
;
182 /* Hook run at end of temp_output_buffer_show. */
184 Lisp_Object Qtemp_buffer_show_hook
;
186 /* Fdisplay_buffer always splits the largest window
187 if that window is more than this high. */
189 EMACS_INT split_height_threshold
;
191 /* Number of lines of continuity in scrolling by screenfuls. */
193 EMACS_INT next_screen_context_lines
;
195 /* Incremented for each window created. */
197 static int sequence_number
;
199 /* Nonzero after init_window_once has finished. */
201 static int window_initialized
;
203 /* Hook to run when window config changes. */
205 Lisp_Object Qwindow_configuration_change_hook
;
206 Lisp_Object Vwindow_configuration_change_hook
;
208 /* Non-nil means scroll commands try to put point
209 at the same screen height as previously. */
211 Lisp_Object Vscroll_preserve_screen_position
;
213 #if 0 /* This isn't used anywhere. */
214 /* Nonzero means we can split a frame even if it is "unsplittable". */
215 static int inhibit_frame_unsplittable
;
218 extern EMACS_INT scroll_margin
;
220 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
222 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
223 doc
: /* Returns t if OBJECT is a window. */)
227 return WINDOWP (object
) ? Qt
: Qnil
;
230 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
231 doc
: /* Returns t if OBJECT is a window which is currently visible. */)
235 return WINDOW_LIVE_P (object
) ? Qt
: Qnil
;
242 register struct window
*p
;
244 p
= allocate_window ();
246 XSETFASTINT (p
->sequence_number
, sequence_number
);
247 XSETFASTINT (p
->left_col
, 0);
248 XSETFASTINT (p
->top_line
, 0);
249 XSETFASTINT (p
->total_lines
, 0);
250 XSETFASTINT (p
->total_cols
, 0);
251 XSETFASTINT (p
->hscroll
, 0);
252 XSETFASTINT (p
->min_hscroll
, 0);
253 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
254 p
->start
= Fmake_marker ();
255 p
->pointm
= Fmake_marker ();
256 XSETFASTINT (p
->use_time
, 0);
258 p
->display_table
= Qnil
;
260 p
->pseudo_window_p
= 0;
261 bzero (&p
->cursor
, sizeof (p
->cursor
));
262 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
263 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
264 p
->desired_matrix
= p
->current_matrix
= 0;
265 p
->nrows_scale_factor
= p
->ncols_scale_factor
= 1;
266 p
->phys_cursor_type
= -1;
267 p
->phys_cursor_width
= -1;
268 p
->must_be_updated_p
= 0;
269 XSETFASTINT (p
->window_end_vpos
, 0);
270 XSETFASTINT (p
->window_end_pos
, 0);
271 p
->window_end_valid
= Qnil
;
274 XSETFASTINT (p
->last_point
, 0);
275 p
->frozen_window_start_p
= 0;
276 p
->height_fixed_p
= 0;
277 p
->last_cursor_off_p
= p
->cursor_off_p
= 0;
278 p
->left_margin_cols
= Qnil
;
279 p
->right_margin_cols
= Qnil
;
280 p
->left_fringe_width
= Qnil
;
281 p
->right_fringe_width
= Qnil
;
282 p
->fringes_outside_margins
= Qnil
;
283 p
->scroll_bar_width
= Qnil
;
284 p
->vertical_scroll_bar_type
= Qt
;
290 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
291 doc
: /* Return the window that the cursor now appears in and commands apply to. */)
294 return selected_window
;
297 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
298 doc
: /* Return the window used now for minibuffers.
299 If the optional argument FRAME is specified, return the minibuffer window
300 used by that frame. */)
305 frame
= selected_frame
;
306 CHECK_LIVE_FRAME (frame
);
307 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
310 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
311 doc
: /* Returns non-nil if WINDOW is a minibuffer window.
312 WINDOW defaults to the selected window. */)
316 struct window
*w
= decode_window (window
);
317 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
321 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
322 Spos_visible_in_window_p
, 0, 3, 0,
323 doc
: /* Return non-nil if position POS is currently on the frame in WINDOW.
324 Return nil if that position is scrolled vertically out of view.
325 If a character is only partially visible, nil is returned, unless the
326 optional argument PARTIALLY is non-nil.
327 If POS is only out of view because of horizontal scrolling, return non-nil.
328 POS defaults to point in WINDOW; WINDOW defaults to the selected window.
330 If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil,
331 return value is a list (X Y PARTIAL) where X and Y are the pixel coordinates
332 relative to the top left corner of the window. PARTIAL is nil if the character
333 after POS is fully visible; otherwise it is a cons (RTOP . RBOT) where RTOP
334 and RBOT are the number of pixels invisible at the top and bottom of the row. */)
335 (pos
, window
, partially
)
336 Lisp_Object pos
, window
, partially
;
338 register struct window
*w
;
340 register struct buffer
*buf
;
342 Lisp_Object in_window
= Qnil
;
343 int rtop
, rbot
, fully_p
= 1;
346 w
= decode_window (window
);
347 buf
= XBUFFER (w
->buffer
);
348 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
352 CHECK_NUMBER_COERCE_MARKER (pos
);
355 else if (w
== XWINDOW (selected_window
))
358 posint
= XMARKER (w
->pointm
)->charpos
;
360 /* If position is above window start or outside buffer boundaries,
361 or if window start is out of range, position is not visible. */
362 if (posint
>= CHARPOS (top
)
363 && posint
<= BUF_ZV (buf
)
364 && CHARPOS (top
) >= BUF_BEGV (buf
)
365 && CHARPOS (top
) <= BUF_ZV (buf
)
366 && pos_visible_p (w
, posint
, &x
, &y
, &rtop
, &rbot
, NILP (partially
))
367 && (fully_p
= !rtop
&& !rbot
, (!NILP (partially
) || fully_p
)))
370 if (!NILP (in_window
) && !NILP (partially
))
371 in_window
= Fcons (make_number (x
),
372 Fcons (make_number (y
),
373 Fcons ((fully_p
? Qnil
374 : Fcons (make_number (rtop
),
375 make_number (rbot
))),
381 static struct window
*
382 decode_window (window
)
383 register Lisp_Object window
;
386 return XWINDOW (selected_window
);
388 CHECK_LIVE_WINDOW (window
);
389 return XWINDOW (window
);
392 static struct window
*
393 decode_any_window (window
)
394 register Lisp_Object window
;
397 return XWINDOW (selected_window
);
399 CHECK_WINDOW (window
);
400 return XWINDOW (window
);
403 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
404 doc
: /* Return the buffer that WINDOW is displaying.
405 WINDOW defaults to the selected window. */)
409 return decode_window (window
)->buffer
;
412 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
413 doc
: /* Return the number of lines in WINDOW (including its mode line). */)
417 return decode_any_window (window
)->total_lines
;
420 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
421 doc
: /* Return the number of display columns in WINDOW.
422 This is the width that is usable columns available for text in WINDOW.
423 If you want to find out how many columns WINDOW takes up,
424 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */)
428 return make_number (window_box_text_cols (decode_any_window (window
)));
431 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
432 doc
: /* Return the number of columns by which WINDOW is scrolled from left margin. */)
436 return decode_window (window
)->hscroll
;
439 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
440 doc
: /* Set number of columns WINDOW is scrolled from left margin to NCOL.
441 Return NCOL. NCOL should be zero or positive.
443 Note that if `automatic-hscrolling' is non-nil, you cannot scroll the
444 window so that the location of point becomes invisible. */)
446 Lisp_Object window
, ncol
;
448 struct window
*w
= decode_window (window
);
452 hscroll
= max (0, XINT (ncol
));
454 /* Prevent redisplay shortcuts when changing the hscroll. */
455 if (XINT (w
->hscroll
) != hscroll
)
456 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
458 w
->hscroll
= make_number (hscroll
);
462 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
463 Swindow_redisplay_end_trigger
, 0, 1, 0,
464 doc
: /* Return WINDOW's redisplay end trigger value.
465 See `set-window-redisplay-end-trigger' for more information. */)
469 return decode_window (window
)->redisplay_end_trigger
;
472 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
473 Sset_window_redisplay_end_trigger
, 2, 2, 0,
474 doc
: /* Set WINDOW's redisplay end trigger value to VALUE.
475 VALUE should be a buffer position (typically a marker) or nil.
476 If it is a buffer position, then if redisplay in WINDOW reaches a position
477 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
478 with two arguments: WINDOW, and the end trigger value.
479 Afterwards the end-trigger value is reset to nil. */)
481 register Lisp_Object window
, value
;
483 register struct window
*w
;
485 w
= decode_window (window
);
486 w
->redisplay_end_trigger
= value
;
490 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
491 doc
: /* Return a list of the edge coordinates of WINDOW.
492 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
493 RIGHT is one more than the rightmost column occupied by WINDOW,
494 and BOTTOM is one more than the bottommost row occupied by WINDOW.
495 The edges include the space used by the window's scroll bar,
496 display margins, fringes, header line, and mode line, if it has them.
497 To get the edges of the actual text area, use `window-inside-edges'. */)
501 register struct window
*w
= decode_any_window (window
);
503 return Fcons (make_number (WINDOW_LEFT_EDGE_COL (w
)),
504 Fcons (make_number (WINDOW_TOP_EDGE_LINE (w
)),
505 Fcons (make_number (WINDOW_RIGHT_EDGE_COL (w
)),
506 Fcons (make_number (WINDOW_BOTTOM_EDGE_LINE (w
)),
510 DEFUN ("window-pixel-edges", Fwindow_pixel_edges
, Swindow_pixel_edges
, 0, 1, 0,
511 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
512 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
513 RIGHT is one more than the rightmost x position occupied by WINDOW,
514 and BOTTOM is one more than the bottommost y position occupied by WINDOW.
515 The pixel edges include the space used by the window's scroll bar,
516 display margins, fringes, header line, and mode line, if it has them.
517 To get the edges of the actual text area, use `window-inside-pixel-edges'. */)
521 register struct window
*w
= decode_any_window (window
);
523 return Fcons (make_number (WINDOW_LEFT_EDGE_X (w
)),
524 Fcons (make_number (WINDOW_TOP_EDGE_Y (w
)),
525 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w
)),
526 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w
)),
530 DEFUN ("window-inside-edges", Fwindow_inside_edges
, Swindow_inside_edges
, 0, 1, 0,
531 doc
: /* Return a list of the edge coordinates of WINDOW.
532 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
533 RIGHT is one more than the rightmost column used by text in WINDOW,
534 and BOTTOM is one more than the bottommost row used by text in WINDOW.
535 The inside edges do not include the space used by the window's scroll bar,
536 display margins, fringes, header line, and/or mode line. */)
540 register struct window
*w
= decode_any_window (window
);
542 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_COL (w
)
543 + WINDOW_LEFT_MARGIN_COLS (w
)
544 + WINDOW_LEFT_FRINGE_COLS (w
)),
545 make_number (WINDOW_TOP_EDGE_LINE (w
)
546 + WINDOW_HEADER_LINE_LINES (w
)),
547 make_number (WINDOW_BOX_RIGHT_EDGE_COL (w
)
548 - WINDOW_RIGHT_MARGIN_COLS (w
)
549 - WINDOW_RIGHT_FRINGE_COLS (w
)),
550 make_number (WINDOW_BOTTOM_EDGE_LINE (w
)
551 - WINDOW_MODE_LINE_LINES (w
)));
554 DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges
, Swindow_inside_pixel_edges
, 0, 1, 0,
555 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
556 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
557 RIGHT is one more than the rightmost x position used by text in WINDOW,
558 and BOTTOM is one more than the bottommost y position used by text in WINDOW.
559 The inside edges do not include the space used by the window's scroll bar,
560 display margins, fringes, header line, and/or mode line. */)
564 register struct window
*w
= decode_any_window (window
);
566 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w
)
567 + WINDOW_LEFT_MARGIN_WIDTH (w
)
568 + WINDOW_LEFT_FRINGE_WIDTH (w
)),
569 make_number (WINDOW_TOP_EDGE_Y (w
)
570 + WINDOW_HEADER_LINE_HEIGHT (w
)),
571 make_number (WINDOW_BOX_RIGHT_EDGE_X (w
)
572 - WINDOW_RIGHT_MARGIN_WIDTH (w
)
573 - WINDOW_RIGHT_FRINGE_WIDTH (w
)),
574 make_number (WINDOW_BOTTOM_EDGE_Y (w
)
575 - WINDOW_MODE_LINE_HEIGHT (w
)));
578 /* Test if the character at column *X, row *Y is within window W.
579 If it is not, return ON_NOTHING;
580 if it is in the window's text area,
581 set *x and *y to its location relative to the upper left corner
584 if it is on the window's modeline, return ON_MODE_LINE;
585 if it is on the border between the window and its right sibling,
586 return ON_VERTICAL_BORDER.
587 if it is on a scroll bar,
588 return ON_SCROLL_BAR.
589 if it is on the window's top line, return ON_HEADER_LINE;
590 if it is in left or right fringe of the window,
591 return ON_LEFT_FRINGE or ON_RIGHT_FRINGE, and convert *X and *Y
592 to window-relative coordinates;
593 if it is in the marginal area to the left/right of the window,
594 return ON_LEFT_MARGIN or ON_RIGHT_MARGIN, and convert *X and *Y
595 to window-relative coordinates.
597 X and Y are frame relative pixel coordinates. */
599 static enum window_part
600 coordinates_in_window (w
, x
, y
)
601 register struct window
*w
;
604 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
605 int left_x
, right_x
, top_y
, bottom_y
;
606 enum window_part part
;
607 int ux
= FRAME_COLUMN_WIDTH (f
);
608 int x0
= WINDOW_LEFT_EDGE_X (w
);
609 int x1
= WINDOW_RIGHT_EDGE_X (w
);
610 /* The width of the area where the vertical line can be dragged.
611 (Between mode lines for instance. */
612 int grabbable_width
= ux
;
613 int lmargin_width
, rmargin_width
, text_left
, text_right
;
615 /* In what's below, we subtract 1 when computing right_x because we
616 want the rightmost pixel, which is given by left_pixel+width-1. */
617 if (w
->pseudo_window_p
)
620 right_x
= WINDOW_TOTAL_WIDTH (w
) - 1;
621 top_y
= WINDOW_TOP_EDGE_Y (w
);
622 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
626 left_x
= WINDOW_BOX_LEFT_EDGE_X (w
);
627 right_x
= WINDOW_BOX_RIGHT_EDGE_X (w
) - 1;
628 top_y
= WINDOW_TOP_EDGE_Y (w
);
629 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
632 /* Outside any interesting row? */
633 if (*y
< top_y
|| *y
>= bottom_y
)
636 /* On the mode line or header line? If it's near the start of
637 the mode or header line of window that's has a horizontal
638 sibling, say it's on the vertical line. That's to be able
639 to resize windows horizontally in case we're using toolkit
642 if (WINDOW_WANTS_MODELINE_P (w
)
643 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
))
647 header_vertical_border_check
:
648 /* We're somewhere on the mode line. We consider the place
649 between mode lines of horizontally adjacent mode lines
650 as the vertical border. If scroll bars on the left,
651 return the right window. */
652 if (WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w
)
653 || WINDOW_RIGHTMOST_P (w
))
655 if (!WINDOW_LEFTMOST_P (w
) && abs (*x
- x0
) < grabbable_width
)
656 return ON_VERTICAL_BORDER
;
660 if (abs (*x
- x1
) < grabbable_width
)
661 return ON_VERTICAL_BORDER
;
664 if (*x
< x0
|| *x
>= x1
)
667 /* Convert X and Y to window relative coordinates.
668 Mode line starts at left edge of window. */
674 if (WINDOW_WANTS_HEADER_LINE_P (w
)
675 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
))
677 part
= ON_HEADER_LINE
;
678 goto header_vertical_border_check
;
681 if (*x
< x0
|| *x
>= x1
)
684 /* Outside any interesting column? */
685 if (*x
< left_x
|| *x
> right_x
)
686 return ON_SCROLL_BAR
;
688 lmargin_width
= window_box_width (w
, LEFT_MARGIN_AREA
);
689 rmargin_width
= window_box_width (w
, RIGHT_MARGIN_AREA
);
691 text_left
= window_box_left (w
, TEXT_AREA
);
692 text_right
= text_left
+ window_box_width (w
, TEXT_AREA
);
694 if (FRAME_WINDOW_P (f
))
696 if (!w
->pseudo_window_p
697 && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w
)
698 && !WINDOW_RIGHTMOST_P (w
)
699 && (abs (*x
- right_x
) < grabbable_width
))
700 return ON_VERTICAL_BORDER
;
704 /* Need to say "*x > right_x" rather than >=, since on character
705 terminals, the vertical line's x coordinate is right_x. */
706 if (!w
->pseudo_window_p
707 && !WINDOW_RIGHTMOST_P (w
)
708 && *x
> right_x
- ux
)
710 /* On the border on the right side of the window? Assume that
711 this area begins at RIGHT_X minus a canonical char width. */
712 return ON_VERTICAL_BORDER
;
718 if (lmargin_width
> 0
719 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
720 ? (*x
>= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
))
721 : (*x
< left_x
+ lmargin_width
)))
724 if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
725 *x
-= WINDOW_LEFT_FRINGE_WIDTH (w
);
727 return ON_LEFT_MARGIN
;
730 /* Convert X and Y to window-relative pixel coordinates. */
733 return ON_LEFT_FRINGE
;
736 if (*x
>= text_right
)
738 if (rmargin_width
> 0
739 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
740 ? (*x
< right_x
- WINDOW_RIGHT_FRINGE_WIDTH (w
))
741 : (*x
>= right_x
- rmargin_width
)))
744 if (!WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
745 *x
-= WINDOW_RIGHT_FRINGE_WIDTH (w
);
747 return ON_RIGHT_MARGIN
;
750 /* Convert X and Y to window-relative pixel coordinates. */
751 *x
-= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
);
753 return ON_RIGHT_FRINGE
;
756 /* Everything special ruled out - must be on text area */
757 *x
-= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
);
763 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
764 Scoordinates_in_window_p
, 2, 2, 0,
765 doc
: /* Return non-nil if COORDINATES are in WINDOW.
766 COORDINATES is a cons of the form (X . Y), X and Y being distances
767 measured in characters from the upper-left corner of the frame.
768 \(0 . 0) denotes the character in the upper left corner of the
770 If COORDINATES are in the text portion of WINDOW,
771 the coordinates relative to the window are returned.
772 If they are in the mode line of WINDOW, `mode-line' is returned.
773 If they are in the top mode line of WINDOW, `header-line' is returned.
774 If they are in the left fringe of WINDOW, `left-fringe' is returned.
775 If they are in the right fringe of WINDOW, `right-fringe' is returned.
776 If they are on the border between WINDOW and its right sibling,
777 `vertical-line' is returned.
778 If they are in the windows's left or right marginal areas, `left-margin'\n\
779 or `right-margin' is returned. */)
780 (coordinates
, window
)
781 register Lisp_Object coordinates
, window
;
788 CHECK_WINDOW (window
);
789 w
= XWINDOW (window
);
790 f
= XFRAME (w
->frame
);
791 CHECK_CONS (coordinates
);
792 lx
= Fcar (coordinates
);
793 ly
= Fcdr (coordinates
);
794 CHECK_NUMBER_OR_FLOAT (lx
);
795 CHECK_NUMBER_OR_FLOAT (ly
);
796 x
= FRAME_PIXEL_X_FROM_CANON_X (f
, lx
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
797 y
= FRAME_PIXEL_Y_FROM_CANON_Y (f
, ly
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
799 switch (coordinates_in_window (w
, &x
, &y
))
805 /* X and Y are now window relative pixel coordinates. Convert
806 them to canonical char units before returning them. */
807 return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f
, x
),
808 FRAME_CANON_Y_FROM_PIXEL_Y (f
, y
));
813 case ON_VERTICAL_BORDER
:
814 return Qvertical_line
;
822 case ON_RIGHT_FRINGE
:
823 return Qright_fringe
;
828 case ON_RIGHT_MARGIN
:
829 return Qright_margin
;
832 /* Historically we are supposed to return nil in this case. */
841 /* Callback for foreach_window, used in window_from_coordinates.
842 Check if window W contains coordinates specified by USER_DATA which
843 is actually a pointer to a struct check_window_data CW.
845 Check if window W contains coordinates *CW->x and *CW->y. If it
846 does, return W in *CW->window, as Lisp_Object, and return in
847 *CW->part the part of the window under coordinates *X,*Y. Return
848 zero from this function to stop iterating over windows. */
850 struct check_window_data
854 enum window_part
*part
;
858 check_window_containing (w
, user_data
)
862 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
863 enum window_part found
;
866 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
867 if (found
!= ON_NOTHING
)
870 XSETWINDOW (*cw
->window
, w
);
878 /* Find the window containing frame-relative pixel position X/Y and
879 return it as a Lisp_Object.
881 If X, Y is on one of the window's special `window_part' elements,
882 set *PART to the id of that element, and return X and Y converted
883 to window relative coordinates in WX and WY.
885 If there is no window under X, Y return nil and leave *PART
886 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
888 This function was previously implemented with a loop cycling over
889 windows with Fnext_window, and starting with the frame's selected
890 window. It turned out that this doesn't work with an
891 implementation of next_window using Vwindow_list, because
892 FRAME_SELECTED_WINDOW (F) is not always contained in the window
893 tree of F when this function is called asynchronously from
894 note_mouse_highlight. The original loop didn't terminate in this
898 window_from_coordinates (f
, x
, y
, part
, wx
, wy
, tool_bar_p
)
901 enum window_part
*part
;
906 struct check_window_data cw
;
907 enum window_part dummy
;
913 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
914 foreach_window (f
, check_window_containing
, &cw
);
916 /* If not found above, see if it's in the tool bar window, if a tool
920 && WINDOWP (f
->tool_bar_window
)
921 && WINDOW_TOTAL_LINES (XWINDOW (f
->tool_bar_window
)) > 0
922 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
)
926 window
= f
->tool_bar_window
;
935 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
936 doc
: /* Return window containing coordinates X and Y on FRAME.
937 If omitted, FRAME defaults to the currently selected frame.
938 The top left corner of the frame is considered to be row 0,
941 Lisp_Object x
, y
, frame
;
946 frame
= selected_frame
;
947 CHECK_LIVE_FRAME (frame
);
950 /* Check that arguments are integers or floats. */
951 CHECK_NUMBER_OR_FLOAT (x
);
952 CHECK_NUMBER_OR_FLOAT (y
);
954 return window_from_coordinates (f
,
955 (FRAME_PIXEL_X_FROM_CANON_X (f
, x
)
956 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
957 (FRAME_PIXEL_Y_FROM_CANON_Y (f
, y
)
958 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
962 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
963 doc
: /* Return current value of point in WINDOW.
964 For a nonselected window, this is the value point would have
965 if that window were selected.
967 Note that, when WINDOW is the selected window and its buffer
968 is also currently selected, the value returned is the same as (point).
969 It would be more strictly correct to return the `top-level' value
970 of point, outside of any save-excursion forms.
971 But that is hard to define. */)
975 register struct window
*w
= decode_window (window
);
977 if (w
== XWINDOW (selected_window
)
978 && current_buffer
== XBUFFER (w
->buffer
))
980 return Fmarker_position (w
->pointm
);
983 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
984 doc
: /* Return position at which display currently starts in WINDOW.
985 This is updated by redisplay or by calling `set-window-start'. */)
989 return Fmarker_position (decode_window (window
)->start
);
992 /* This is text temporarily removed from the doc string below.
994 This function returns nil if the position is not currently known.
995 That happens when redisplay is preempted and doesn't finish.
996 If in that case you want to compute where the end of the window would
997 have been if redisplay had finished, do this:
999 (goto-char (window-start window))
1000 (vertical-motion (1- (window-height window)) window)
1003 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
1004 doc
: /* Return position at which display currently ends in WINDOW.
1005 This is updated by redisplay, when it runs to completion.
1006 Simply changing the buffer text or setting `window-start'
1007 does not update this value.
1008 Return nil if there is no recorded value. \(This can happen if the
1009 last redisplay of WINDOW was preempted, and did not finish.)
1010 If UPDATE is non-nil, compute the up-to-date position
1011 if it isn't already recorded. */)
1013 Lisp_Object window
, update
;
1016 struct window
*w
= decode_window (window
);
1022 #if 0 /* This change broke some things. We should make it later. */
1023 /* If we don't know the end position, return nil.
1024 The user can compute it with vertical-motion if he wants to.
1025 It would be nicer to do it automatically,
1026 but that's so slow that it would probably bother people. */
1027 if (NILP (w
->window_end_valid
))
1032 && ! (! NILP (w
->window_end_valid
)
1033 && XFASTINT (w
->last_modified
) >= MODIFF
))
1035 struct text_pos startp
;
1037 struct buffer
*old_buffer
= NULL
, *b
= XBUFFER (buf
);
1039 /* In case W->start is out of the range, use something
1040 reasonable. This situation occurred when loading a file with
1041 `-l' containing a call to `rmail' with subsequent other
1042 commands. At the end, W->start happened to be BEG, while
1043 rmail had already narrowed the buffer. */
1044 if (XMARKER (w
->start
)->charpos
< BEGV
)
1045 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
1046 else if (XMARKER (w
->start
)->charpos
> ZV
)
1047 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
1049 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
1051 /* Cannot use Fvertical_motion because that function doesn't
1052 cope with variable-height lines. */
1053 if (b
!= current_buffer
)
1055 old_buffer
= current_buffer
;
1056 set_buffer_internal (b
);
1059 start_display (&it
, w
, startp
);
1060 move_it_vertically (&it
, window_box_height (w
));
1061 if (it
.current_y
< it
.last_visible_y
)
1062 move_it_past_eol (&it
);
1063 value
= make_number (IT_CHARPOS (it
));
1066 set_buffer_internal (old_buffer
);
1069 XSETINT (value
, BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
1074 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
1075 doc
: /* Make point value in WINDOW be at position POS in WINDOW's buffer.
1078 Lisp_Object window
, pos
;
1080 register struct window
*w
= decode_window (window
);
1082 CHECK_NUMBER_COERCE_MARKER (pos
);
1083 if (w
== XWINDOW (selected_window
)
1084 && XBUFFER (w
->buffer
) == current_buffer
)
1087 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
1089 /* We have to make sure that redisplay updates the window to show
1090 the new value of point. */
1091 if (!EQ (window
, selected_window
))
1092 ++windows_or_buffers_changed
;
1097 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
1098 doc
: /* Make display in WINDOW start at position POS in WINDOW's buffer.
1100 Optional third arg NOFORCE non-nil inhibits next redisplay
1101 from overriding motion of point in order to display at this exact start. */)
1102 (window
, pos
, noforce
)
1103 Lisp_Object window
, pos
, noforce
;
1105 register struct window
*w
= decode_window (window
);
1107 CHECK_NUMBER_COERCE_MARKER (pos
);
1108 set_marker_restricted (w
->start
, pos
, w
->buffer
);
1109 /* this is not right, but much easier than doing what is right. */
1110 w
->start_at_line_beg
= Qnil
;
1112 w
->force_start
= Qt
;
1113 w
->update_mode_line
= Qt
;
1114 XSETFASTINT (w
->last_modified
, 0);
1115 XSETFASTINT (w
->last_overlay_modified
, 0);
1116 if (!EQ (window
, selected_window
))
1117 windows_or_buffers_changed
++;
1122 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
1124 doc
: /* Return WINDOW's dedicated object, usually t or nil.
1125 See also `set-window-dedicated-p'. */)
1129 return decode_window (window
)->dedicated
;
1132 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
1133 Sset_window_dedicated_p
, 2, 2, 0,
1134 doc
: /* Control whether WINDOW is dedicated to the buffer it displays.
1135 If it is dedicated, Emacs will not automatically change
1136 which buffer appears in it.
1137 The second argument is the new value for the dedication flag;
1138 non-nil means yes. */)
1140 Lisp_Object window
, arg
;
1142 register struct window
*w
= decode_window (window
);
1146 return w
->dedicated
;
1149 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1151 doc
: /* Return the display-table that WINDOW is using. */)
1155 return decode_window (window
)->display_table
;
1158 /* Get the display table for use on window W. This is either W's
1159 display table or W's buffer's display table. Ignore the specified
1160 tables if they are not valid; if no valid table is specified,
1163 struct Lisp_Char_Table
*
1164 window_display_table (w
)
1167 struct Lisp_Char_Table
*dp
= NULL
;
1169 if (DISP_TABLE_P (w
->display_table
))
1170 dp
= XCHAR_TABLE (w
->display_table
);
1171 else if (BUFFERP (w
->buffer
))
1173 struct buffer
*b
= XBUFFER (w
->buffer
);
1175 if (DISP_TABLE_P (b
->display_table
))
1176 dp
= XCHAR_TABLE (b
->display_table
);
1177 else if (DISP_TABLE_P (Vstandard_display_table
))
1178 dp
= XCHAR_TABLE (Vstandard_display_table
);
1184 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1185 doc
: /* Set WINDOW's display-table to TABLE. */)
1187 register Lisp_Object window
, table
;
1189 register struct window
*w
;
1191 w
= decode_window (window
);
1192 w
->display_table
= table
;
1196 /* Record info on buffer window w is displaying
1197 when it is about to cease to display that buffer. */
1200 register struct window
*w
;
1207 if (b
!= XMARKER (w
->pointm
)->buffer
)
1211 if (w
== XWINDOW (selected_window
)
1212 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1213 /* Do this except when the selected window's buffer
1214 is being removed from some other window. */
1216 /* last_window_start records the start position that this buffer
1217 had in the last window to be disconnected from it.
1218 Now that this statement is unconditional,
1219 it is possible for the buffer to be displayed in the
1220 selected window, while last_window_start reflects another
1221 window which was recently showing the same buffer.
1222 Some people might say that might be a good thing. Let's see. */
1223 b
->last_window_start
= marker_position (w
->start
);
1225 /* Point in the selected window's buffer
1226 is actually stored in that buffer, and the window's pointm isn't used.
1227 So don't clobber point in that buffer. */
1228 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1229 /* This line helps to fix Horsley's testbug.el bug. */
1230 && !(WINDOWP (b
->last_selected_window
)
1231 && w
!= XWINDOW (b
->last_selected_window
)
1232 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1233 temp_set_point_both (b
,
1234 clip_to_bounds (BUF_BEGV (b
),
1235 XMARKER (w
->pointm
)->charpos
,
1237 clip_to_bounds (BUF_BEGV_BYTE (b
),
1238 marker_byte_position (w
->pointm
),
1241 if (WINDOWP (b
->last_selected_window
)
1242 && w
== XWINDOW (b
->last_selected_window
))
1243 b
->last_selected_window
= Qnil
;
1246 /* Put replacement into the window structure in place of old. */
1248 replace_window (old
, replacement
)
1249 Lisp_Object old
, replacement
;
1251 register Lisp_Object tem
;
1252 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1254 /* If OLD is its frame's root_window, then replacement is the new
1255 root_window for that frame. */
1257 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1258 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1260 p
->left_col
= o
->left_col
;
1261 p
->top_line
= o
->top_line
;
1262 p
->total_cols
= o
->total_cols
;
1263 p
->total_lines
= o
->total_lines
;
1264 p
->desired_matrix
= p
->current_matrix
= 0;
1266 bzero (&p
->cursor
, sizeof (p
->cursor
));
1267 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1268 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1269 p
->phys_cursor_type
= -1;
1270 p
->phys_cursor_width
= -1;
1271 p
->must_be_updated_p
= 0;
1272 p
->pseudo_window_p
= 0;
1273 XSETFASTINT (p
->window_end_vpos
, 0);
1274 XSETFASTINT (p
->window_end_pos
, 0);
1275 p
->window_end_valid
= Qnil
;
1276 p
->frozen_window_start_p
= 0;
1277 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
1279 p
->next
= tem
= o
->next
;
1281 XWINDOW (tem
)->prev
= replacement
;
1283 p
->prev
= tem
= o
->prev
;
1285 XWINDOW (tem
)->next
= replacement
;
1287 p
->parent
= tem
= o
->parent
;
1290 if (EQ (XWINDOW (tem
)->vchild
, old
))
1291 XWINDOW (tem
)->vchild
= replacement
;
1292 if (EQ (XWINDOW (tem
)->hchild
, old
))
1293 XWINDOW (tem
)->hchild
= replacement
;
1296 /*** Here, if replacement is a vertical combination
1297 and so is its new parent, we should make replacement's
1298 children be children of that parent instead. ***/
1301 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1302 doc
: /* Remove WINDOW from the display. Default is selected window. */)
1304 register Lisp_Object window
;
1306 delete_window (window
);
1308 if (! NILP (Vwindow_configuration_change_hook
)
1309 && ! NILP (Vrun_hooks
))
1310 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1316 delete_window (window
)
1317 register Lisp_Object window
;
1319 register Lisp_Object tem
, parent
, sib
;
1320 register struct window
*p
;
1321 register struct window
*par
;
1324 /* Because this function is called by other C code on non-leaf
1325 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1326 so we can't decode_window here. */
1328 window
= selected_window
;
1330 CHECK_WINDOW (window
);
1331 p
= XWINDOW (window
);
1333 /* It's okay to delete an already-deleted window. */
1334 if (NILP (p
->buffer
)
1336 && NILP (p
->vchild
))
1341 error ("Attempt to delete minibuffer or sole ordinary window");
1342 par
= XWINDOW (parent
);
1344 windows_or_buffers_changed
++;
1345 Vwindow_list
= Qnil
;
1346 f
= XFRAME (WINDOW_FRAME (p
));
1347 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1349 /* Are we trying to delete any frame's selected window? */
1351 Lisp_Object swindow
, pwindow
;
1353 /* See if the frame's selected window is either WINDOW
1354 or any subwindow of it, by finding all that window's parents
1355 and comparing each one with WINDOW. */
1356 swindow
= FRAME_SELECTED_WINDOW (f
);
1361 while (!NILP (pwindow
))
1363 if (EQ (window
, pwindow
))
1365 pwindow
= XWINDOW (pwindow
)->parent
;
1368 /* If the window being deleted is not a parent of SWINDOW,
1369 then SWINDOW is ok as the new selected window. */
1370 if (!EQ (window
, pwindow
))
1372 /* Otherwise, try another window for SWINDOW. */
1373 swindow
= Fnext_window (swindow
, Qlambda
, Qnil
);;
1375 /* If we get back to the frame's selected window,
1376 it means there was no acceptable alternative,
1377 so we cannot delete. */
1378 if (EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1379 error ("Cannot delete window");
1382 /* If we need to change SWINDOW, do it. */
1383 if (! EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1385 /* If we're about to delete the selected window on the
1386 selected frame, then we should use Fselect_window to select
1387 the new window. On the other hand, if we're about to
1388 delete the selected window on any other frame, we shouldn't do
1389 anything but set the frame's selected_window slot. */
1390 if (EQ (FRAME_SELECTED_WINDOW (f
), selected_window
))
1391 Fselect_window (swindow
, Qnil
);
1393 FRAME_SELECTED_WINDOW (f
) = swindow
;
1398 /* tem is null for dummy parent windows
1399 (which have inferiors but not any contents themselves) */
1403 unchain_marker (XMARKER (p
->pointm
));
1404 unchain_marker (XMARKER (p
->start
));
1407 /* Free window glyph matrices. It is sure that they are allocated
1408 again when ADJUST_GLYPHS is called. Block input so that expose
1409 events and other events that access glyph matrices are not
1410 processed while we are changing them. */
1412 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1416 XWINDOW (tem
)->prev
= p
->prev
;
1420 XWINDOW (tem
)->next
= p
->next
;
1422 if (EQ (window
, par
->hchild
))
1423 par
->hchild
= p
->next
;
1424 if (EQ (window
, par
->vchild
))
1425 par
->vchild
= p
->next
;
1427 /* Find one of our siblings to give our space to. */
1431 /* If p gives its space to its next sibling, that sibling needs
1432 to have its top/left side pulled back to where p's is.
1433 set_window_{height,width} will re-position the sibling's
1436 XWINDOW (sib
)->top_line
= p
->top_line
;
1437 XWINDOW (sib
)->left_col
= p
->left_col
;
1440 /* Stretch that sibling. */
1441 if (!NILP (par
->vchild
))
1442 set_window_height (sib
,
1443 XFASTINT (XWINDOW (sib
)->total_lines
) + XFASTINT (p
->total_lines
),
1445 if (!NILP (par
->hchild
))
1446 set_window_width (sib
,
1447 XFASTINT (XWINDOW (sib
)->total_cols
) + XFASTINT (p
->total_cols
),
1450 /* If parent now has only one child,
1451 put the child into the parent's place. */
1455 if (NILP (XWINDOW (tem
)->next
)) {
1456 replace_window (parent
, tem
);
1457 par
= XWINDOW (tem
);
1460 /* Since we may be deleting combination windows, we must make sure that
1461 not only p but all its children have been marked as deleted. */
1462 if (! NILP (p
->hchild
))
1463 delete_all_subwindows (XWINDOW (p
->hchild
));
1464 else if (! NILP (p
->vchild
))
1465 delete_all_subwindows (XWINDOW (p
->vchild
));
1467 /* Mark this window as deleted. */
1468 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1470 if (! NILP (par
->parent
))
1471 par
= XWINDOW (par
->parent
);
1473 /* Check if we have a v/hchild with a v/hchild. In that case remove
1476 if (! NILP (par
->vchild
) && ! NILP (XWINDOW (par
->vchild
)->vchild
))
1478 p
= XWINDOW (par
->vchild
);
1479 par
->vchild
= p
->vchild
;
1482 else if (! NILP (par
->hchild
) && ! NILP (XWINDOW (par
->hchild
)->hchild
))
1484 p
= XWINDOW (par
->hchild
);
1485 par
->hchild
= p
->hchild
;
1493 while (! NILP (tem
)) {
1494 XWINDOW (tem
)->parent
= p
->parent
;
1495 if (NILP (XWINDOW (tem
)->next
))
1497 tem
= XWINDOW (tem
)->next
;
1500 /* The next of the v/hchild we are removing is now the next of the
1501 last child for the v/hchild:
1502 Before v/hchild -> v/hchild -> next1 -> next2
1505 After: v/hchild -> next1 -> next2 -> next3
1507 XWINDOW (tem
)->next
= p
->next
;
1508 if (! NILP (p
->next
))
1509 XWINDOW (p
->next
)->prev
= tem
;
1511 p
->next
= p
->prev
= p
->vchild
= p
->hchild
= p
->buffer
= Qnil
;
1515 /* Adjust glyph matrices. */
1522 /***********************************************************************
1524 ***********************************************************************/
1526 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1527 pointer. This is a callback function for foreach_window, used in
1528 function window_list. */
1531 add_window_to_list (w
, user_data
)
1535 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1537 XSETWINDOW (window
, w
);
1538 *list
= Fcons (window
, *list
);
1543 /* Return a list of all windows, for use by next_window. If
1544 Vwindow_list is a list, return that list. Otherwise, build a new
1545 list, cache it in Vwindow_list, and return that. */
1550 if (!CONSP (Vwindow_list
))
1554 Vwindow_list
= Qnil
;
1555 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1557 Lisp_Object args
[2];
1559 /* We are visiting windows in canonical order, and add
1560 new windows at the front of args[1], which means we
1561 have to reverse this list at the end. */
1563 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1564 args
[0] = Vwindow_list
;
1565 args
[1] = Fnreverse (args
[1]);
1566 Vwindow_list
= Fnconc (2, args
);
1570 return Vwindow_list
;
1574 /* Value is non-zero if WINDOW satisfies the constraints given by
1575 OWINDOW, MINIBUF and ALL_FRAMES.
1577 MINIBUF t means WINDOW may be minibuffer windows.
1578 `lambda' means WINDOW may not be a minibuffer window.
1579 a window means a specific minibuffer window
1581 ALL_FRAMES t means search all frames,
1582 nil means search just current frame,
1583 `visible' means search just visible frames,
1584 0 means search visible and iconified frames,
1585 a window means search the frame that window belongs to,
1586 a frame means consider windows on that frame, only. */
1589 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1590 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1592 struct window
*w
= XWINDOW (window
);
1593 struct frame
*f
= XFRAME (w
->frame
);
1594 int candidate_p
= 1;
1596 if (!BUFFERP (w
->buffer
))
1598 else if (MINI_WINDOW_P (w
)
1599 && (EQ (minibuf
, Qlambda
)
1600 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1602 /* If MINIBUF is `lambda' don't consider any mini-windows.
1603 If it is a window, consider only that one. */
1606 else if (EQ (all_frames
, Qt
))
1608 else if (NILP (all_frames
))
1610 xassert (WINDOWP (owindow
));
1611 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1613 else if (EQ (all_frames
, Qvisible
))
1615 FRAME_SAMPLE_VISIBILITY (f
);
1616 candidate_p
= FRAME_VISIBLE_P (f
);
1618 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1620 FRAME_SAMPLE_VISIBILITY (f
);
1621 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1623 else if (WINDOWP (all_frames
))
1624 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1625 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1626 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1627 else if (FRAMEP (all_frames
))
1628 candidate_p
= EQ (all_frames
, w
->frame
);
1634 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1635 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1639 decode_next_window_args (window
, minibuf
, all_frames
)
1640 Lisp_Object
*window
, *minibuf
, *all_frames
;
1643 *window
= selected_window
;
1645 CHECK_LIVE_WINDOW (*window
);
1647 /* MINIBUF nil may or may not include minibuffers. Decide if it
1649 if (NILP (*minibuf
))
1650 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1651 else if (!EQ (*minibuf
, Qt
))
1654 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1655 => count none of them, or a specific minibuffer window (the
1656 active one) to count. */
1658 /* ALL_FRAMES nil doesn't specify which frames to include. */
1659 if (NILP (*all_frames
))
1660 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1661 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1663 else if (EQ (*all_frames
, Qvisible
))
1665 else if (EQ (*all_frames
, make_number (0)))
1667 else if (FRAMEP (*all_frames
))
1669 else if (!EQ (*all_frames
, Qt
))
1672 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1673 search just current frame, `visible' meaning search just visible
1674 frames, 0 meaning search visible and iconified frames, or a
1675 window, meaning search the frame that window belongs to, or a
1676 frame, meaning consider windows on that frame, only. */
1680 /* Return the next or previous window of WINDOW in canonical ordering
1681 of windows. NEXT_P non-zero means return the next window. See the
1682 documentation string of next-window for the meaning of MINIBUF and
1686 next_window (window
, minibuf
, all_frames
, next_p
)
1687 Lisp_Object window
, minibuf
, all_frames
;
1690 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1692 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1693 return the first window on the frame. */
1694 if (FRAMEP (all_frames
)
1695 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1696 return Fframe_first_window (all_frames
);
1702 /* Find WINDOW in the list of all windows. */
1703 list
= Fmemq (window
, window_list ());
1705 /* Scan forward from WINDOW to the end of the window list. */
1707 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1708 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1711 /* Scan from the start of the window list up to WINDOW. */
1713 for (list
= Vwindow_list
;
1714 CONSP (list
) && !EQ (XCAR (list
), window
);
1716 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1720 window
= XCAR (list
);
1724 Lisp_Object candidate
, list
;
1726 /* Scan through the list of windows for candidates. If there are
1727 candidate windows in front of WINDOW, the last one of these
1728 is the one we want. If there are candidates following WINDOW
1729 in the list, again the last one of these is the one we want. */
1731 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1733 if (EQ (XCAR (list
), window
))
1735 if (WINDOWP (candidate
))
1738 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1740 candidate
= XCAR (list
);
1743 if (WINDOWP (candidate
))
1751 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1752 doc
: /* Return next window after WINDOW in canonical ordering of windows.
1753 If omitted, WINDOW defaults to the selected window.
1755 Optional second arg MINIBUF t means count the minibuffer window even
1756 if not active. MINIBUF nil or omitted means count the minibuffer iff
1757 it is active. MINIBUF neither t nor nil means not to count the
1758 minibuffer even if it is active.
1760 Several frames may share a single minibuffer; if the minibuffer
1761 counts, all windows on all frames that share that minibuffer count
1762 too. Therefore, `next-window' can be used to iterate through the
1763 set of windows even when the minibuffer is on another frame. If the
1764 minibuffer does not count, only windows from WINDOW's frame count.
1766 Optional third arg ALL-FRAMES t means include windows on all frames.
1767 ALL-FRAMES nil or omitted means cycle within the frames as specified
1768 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1769 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1770 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1771 Anything else means restrict to WINDOW's frame.
1773 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1774 `next-window' to iterate through the entire cycle of acceptable
1775 windows, eventually ending up back at the window you started with.
1776 `previous-window' traverses the same cycle, in the reverse order. */)
1777 (window
, minibuf
, all_frames
)
1778 Lisp_Object window
, minibuf
, all_frames
;
1780 return next_window (window
, minibuf
, all_frames
, 1);
1784 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1785 doc
: /* Return the window preceding WINDOW in canonical ordering of windows.
1786 If omitted, WINDOW defaults to the selected window.
1788 Optional second arg MINIBUF t means count the minibuffer window even
1789 if not active. MINIBUF nil or omitted means count the minibuffer iff
1790 it is active. MINIBUF neither t nor nil means not to count the
1791 minibuffer even if it is active.
1793 Several frames may share a single minibuffer; if the minibuffer
1794 counts, all windows on all frames that share that minibuffer count
1795 too. Therefore, `previous-window' can be used to iterate through
1796 the set of windows even when the minibuffer is on another frame. If
1797 the minibuffer does not count, only windows from WINDOW's frame count
1799 Optional third arg ALL-FRAMES t means include windows on all frames.
1800 ALL-FRAMES nil or omitted means cycle within the frames as specified
1801 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1802 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1803 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1804 Anything else means restrict to WINDOW's frame.
1806 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1807 `previous-window' to iterate through the entire cycle of acceptable
1808 windows, eventually ending up back at the window you started with.
1809 `next-window' traverses the same cycle, in the reverse order. */)
1810 (window
, minibuf
, all_frames
)
1811 Lisp_Object window
, minibuf
, all_frames
;
1813 return next_window (window
, minibuf
, all_frames
, 0);
1817 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1818 doc
: /* Select the ARG'th different window on this frame.
1819 All windows on current frame are arranged in a cyclic order.
1820 This command selects the window ARG steps away in that order.
1821 A negative ARG moves in the opposite order. The optional second
1822 argument ALL_FRAMES has the same meaning as in `next-window', which see. */)
1824 Lisp_Object arg
, all_frames
;
1830 window
= selected_window
;
1832 for (i
= XINT (arg
); i
> 0; --i
)
1833 window
= Fnext_window (window
, Qnil
, all_frames
);
1835 window
= Fprevious_window (window
, Qnil
, all_frames
);
1837 Fselect_window (window
, Qnil
);
1842 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1843 doc
: /* Return a list of windows on FRAME, starting with WINDOW.
1844 FRAME nil or omitted means use the selected frame.
1845 WINDOW nil or omitted means use the selected window.
1846 MINIBUF t means include the minibuffer window, even if it isn't active.
1847 MINIBUF nil or omitted means include the minibuffer window only
1849 MINIBUF neither nil nor t means never include the minibuffer window. */)
1850 (frame
, minibuf
, window
)
1851 Lisp_Object frame
, minibuf
, window
;
1854 window
= selected_window
;
1856 frame
= selected_frame
;
1858 if (!EQ (frame
, XWINDOW (window
)->frame
))
1859 error ("Window is on a different frame");
1861 return window_list_1 (window
, minibuf
, frame
);
1865 /* Return a list of windows in canonical ordering. Arguments are like
1866 for `next-window'. */
1869 window_list_1 (window
, minibuf
, all_frames
)
1870 Lisp_Object window
, minibuf
, all_frames
;
1872 Lisp_Object tail
, list
, rest
;
1874 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1877 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1878 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1879 list
= Fcons (XCAR (tail
), list
);
1881 /* Rotate the list to start with WINDOW. */
1882 list
= Fnreverse (list
);
1883 rest
= Fmemq (window
, list
);
1884 if (!NILP (rest
) && !EQ (rest
, list
))
1886 for (tail
= list
; !EQ (XCDR (tail
), rest
); tail
= XCDR (tail
))
1888 XSETCDR (tail
, Qnil
);
1889 list
= nconc2 (rest
, list
);
1896 /* Look at all windows, performing an operation specified by TYPE
1898 If FRAMES is Qt, look at all frames;
1899 Qnil, look at just the selected frame;
1900 Qvisible, look at visible frames;
1901 a frame, just look at windows on that frame.
1902 If MINI is non-zero, perform the operation on minibuffer windows too. */
1907 GET_BUFFER_WINDOW
, /* Arg is buffer */
1908 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1909 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1910 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1912 UNSHOW_BUFFER
, /* Arg is buffer */
1913 REDISPLAY_BUFFER_WINDOWS
, /* Arg is buffer */
1918 window_loop (type
, obj
, mini
, frames
)
1919 enum window_loop type
;
1920 Lisp_Object obj
, frames
;
1923 Lisp_Object window
, windows
, best_window
, frame_arg
;
1925 struct gcpro gcpro1
;
1927 /* If we're only looping through windows on a particular frame,
1928 frame points to that frame. If we're looping through windows
1929 on all frames, frame is 0. */
1930 if (FRAMEP (frames
))
1931 f
= XFRAME (frames
);
1932 else if (NILP (frames
))
1933 f
= SELECTED_FRAME ();
1938 frame_arg
= Qlambda
;
1939 else if (EQ (frames
, make_number (0)))
1941 else if (EQ (frames
, Qvisible
))
1946 /* frame_arg is Qlambda to stick to one frame,
1947 Qvisible to consider all visible frames,
1950 /* Pick a window to start with. */
1954 window
= FRAME_SELECTED_WINDOW (f
);
1956 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1958 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1962 for (; CONSP (windows
); windows
= CDR (windows
))
1966 window
= XCAR (windows
);
1967 w
= XWINDOW (window
);
1969 /* Note that we do not pay attention here to whether the frame
1970 is visible, since Fwindow_list skips non-visible frames if
1971 that is desired, under the control of frame_arg. */
1972 if (!MINI_WINDOW_P (w
)
1973 /* For UNSHOW_BUFFER, we must always consider all windows. */
1974 || type
== UNSHOW_BUFFER
1975 || (mini
&& minibuf_level
> 0))
1978 case GET_BUFFER_WINDOW
:
1979 if (EQ (w
->buffer
, obj
)
1980 /* Don't find any minibuffer window
1981 except the one that is currently in use. */
1982 && (MINI_WINDOW_P (w
)
1983 ? EQ (window
, minibuf_window
)
1986 if (NILP (best_window
))
1987 best_window
= window
;
1988 else if (EQ (window
, selected_window
))
1989 /* For compatibility with 20.x, prefer to return
1991 best_window
= window
;
1995 case GET_LRU_WINDOW
:
1996 /* t as arg means consider only full-width windows */
1997 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
1999 /* Ignore dedicated windows and minibuffers. */
2000 if (MINI_WINDOW_P (w
) || EQ (w
->dedicated
, Qt
))
2002 if (NILP (best_window
)
2003 || (XFASTINT (XWINDOW (best_window
)->use_time
)
2004 > XFASTINT (w
->use_time
)))
2005 best_window
= window
;
2008 case DELETE_OTHER_WINDOWS
:
2009 if (!EQ (window
, obj
))
2010 Fdelete_window (window
);
2013 case DELETE_BUFFER_WINDOWS
:
2014 if (EQ (w
->buffer
, obj
))
2016 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
2018 /* If this window is dedicated, and in a frame of its own,
2020 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2021 && !NILP (w
->dedicated
)
2022 && other_visible_frames (f
))
2024 /* Skip the other windows on this frame.
2025 There might be one, the minibuffer! */
2026 while (CONSP (XCDR (windows
))
2027 && EQ (XWINDOW (XCAR (windows
))->frame
,
2028 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2029 windows
= XCDR (windows
);
2031 /* Now we can safely delete the frame. */
2032 Fdelete_frame (w
->frame
, Qnil
);
2034 else if (NILP (w
->parent
))
2036 /* If we're deleting the buffer displayed in the
2037 only window on the frame, find a new buffer to
2040 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2041 Fset_window_buffer (window
, buffer
, Qnil
);
2042 if (EQ (window
, selected_window
))
2043 Fset_buffer (w
->buffer
);
2046 Fdelete_window (window
);
2050 case GET_LARGEST_WINDOW
:
2052 /* Ignore dedicated windows and minibuffers. */
2053 if (MINI_WINDOW_P (w
) || EQ (w
->dedicated
, Qt
))
2056 if (NILP (best_window
))
2057 best_window
= window
;
2060 struct window
*b
= XWINDOW (best_window
);
2061 if (XFASTINT (w
->total_lines
) * XFASTINT (w
->total_cols
)
2062 > XFASTINT (b
->total_lines
) * XFASTINT (b
->total_cols
))
2063 best_window
= window
;
2069 if (EQ (w
->buffer
, obj
))
2072 struct frame
*f
= XFRAME (w
->frame
);
2074 /* Find another buffer to show in this window. */
2075 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2077 /* If this window is dedicated, and in a frame of its own,
2079 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2080 && !NILP (w
->dedicated
)
2081 && other_visible_frames (f
))
2083 /* Skip the other windows on this frame.
2084 There might be one, the minibuffer! */
2085 while (CONSP (XCDR (windows
))
2086 && EQ (XWINDOW (XCAR (windows
))->frame
,
2087 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2088 windows
= XCDR (windows
);
2090 /* Now we can safely delete the frame. */
2091 Fdelete_frame (w
->frame
, Qnil
);
2093 else if (!NILP (w
->dedicated
) && !NILP (w
->parent
))
2096 XSETWINDOW (window
, w
);
2097 /* If this window is dedicated and not the only window
2098 in its frame, then kill it. */
2099 Fdelete_window (window
);
2103 /* Otherwise show a different buffer in the window. */
2104 w
->dedicated
= Qnil
;
2105 Fset_window_buffer (window
, buffer
, Qnil
);
2106 if (EQ (window
, selected_window
))
2107 Fset_buffer (w
->buffer
);
2112 case REDISPLAY_BUFFER_WINDOWS
:
2113 if (EQ (w
->buffer
, obj
))
2115 mark_window_display_accurate (window
, 0);
2116 w
->update_mode_line
= Qt
;
2117 XBUFFER (obj
)->prevent_redisplay_optimizations_p
= 1;
2118 ++update_mode_lines
;
2119 best_window
= window
;
2123 /* Check for a window that has a killed buffer. */
2124 case CHECK_ALL_WINDOWS
:
2125 if (! NILP (w
->buffer
)
2126 && NILP (XBUFFER (w
->buffer
)->name
))
2130 case WINDOW_LOOP_UNUSED
:
2139 /* Used for debugging. Abort if any window has a dead buffer. */
2142 check_all_windows ()
2144 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
2147 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
2148 doc
: /* Return the window least recently selected or used for display.
2149 Return a full-width window if possible.
2150 A minibuffer window is never a candidate.
2151 A dedicated window is never a candidate, so if all windows are dedicated,
2153 If optional argument FRAME is `visible', search all visible frames.
2154 If FRAME is 0, search all visible and iconified frames.
2155 If FRAME is t, search all frames.
2156 If FRAME is nil, search only the selected frame.
2157 If FRAME is a frame, search only that frame. */)
2161 register Lisp_Object w
;
2162 /* First try for a window that is full-width */
2163 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
2164 if (!NILP (w
) && !EQ (w
, selected_window
))
2166 /* If none of them, try the rest */
2167 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
2170 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
2171 doc
: /* Return the largest window in area.
2172 A minibuffer window is never a candidate.
2173 A dedicated window is never a candidate, so if all windows are dedicated,
2175 If optional argument FRAME is `visible', search all visible frames.
2176 If FRAME is 0, search all visible and iconified frames.
2177 If FRAME is t, search all frames.
2178 If FRAME is nil, search only the selected frame.
2179 If FRAME is a frame, search only that frame. */)
2183 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
2187 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
2188 doc
: /* Return a window currently displaying BUFFER, or nil if none.
2189 BUFFER can be a buffer or a buffer name.
2190 If optional argument FRAME is `visible', search all visible frames.
2191 If optional argument FRAME is 0, search all visible and iconified frames.
2192 If FRAME is t, search all frames.
2193 If FRAME is nil, search only the selected frame.
2194 If FRAME is a frame, search only that frame. */)
2196 Lisp_Object buffer
, frame
;
2198 buffer
= Fget_buffer (buffer
);
2199 if (BUFFERP (buffer
))
2200 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
2205 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
2207 doc
: /* Make WINDOW (or the selected window) fill its frame.
2208 Only the frame WINDOW is on is affected.
2209 This function tries to reduce display jumps
2210 by keeping the text previously visible in WINDOW
2211 in the same place on the frame. Doing this depends on
2212 the value of (window-start WINDOW), so if calling this function
2213 in a program gives strange scrolling, make sure the window-start
2214 value is reasonable when this function is called. */)
2223 window
= selected_window
;
2225 CHECK_LIVE_WINDOW (window
);
2226 w
= XWINDOW (window
);
2228 startpos
= marker_position (w
->start
);
2229 top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2231 if (MINI_WINDOW_P (w
) && top
> 0)
2232 error ("Can't expand minibuffer to full frame");
2234 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2236 /* Try to minimize scrolling, by setting the window start to the point
2237 will cause the text at the old window start to be at the same place
2238 on the frame. But don't try to do this if the window start is
2239 outside the visible portion (as might happen when the display is
2240 not current, due to typeahead). */
2241 new_top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2243 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2244 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2246 struct position pos
;
2247 struct buffer
*obuf
= current_buffer
;
2249 Fset_buffer (w
->buffer
);
2250 /* This computation used to temporarily move point, but that can
2251 have unwanted side effects due to text properties. */
2252 pos
= *vmotion (startpos
, -top
, w
);
2254 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2255 w
->window_end_valid
= Qnil
;
2256 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2257 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2259 /* We need to do this, so that the window-scroll-functions
2261 w
->optional_new_start
= Qt
;
2263 set_buffer_internal (obuf
);
2269 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2270 1, 2, "bDelete windows on (buffer): ",
2271 doc
: /* Delete all windows showing BUFFER.
2272 BUFFER must be a buffer or the name of an existing buffer.
2273 Optional second argument FRAME controls which frames are affected.
2274 If optional argument FRAME is `visible', search all visible frames.
2275 If FRAME is 0, search all visible and iconified frames.
2276 If FRAME is nil, search all frames.
2277 If FRAME is t, search only the selected frame.
2278 If FRAME is a frame, search only that frame. */)
2280 Lisp_Object buffer
, frame
;
2282 /* FRAME uses t and nil to mean the opposite of what window_loop
2286 else if (EQ (frame
, Qt
))
2291 buffer
= Fget_buffer (buffer
);
2292 CHECK_BUFFER (buffer
);
2293 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2299 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2300 Sreplace_buffer_in_windows
,
2301 1, 1, "bReplace buffer in windows: ",
2302 doc
: /* Replace BUFFER with some other buffer in all windows showing it.
2303 BUFFER may be a buffer or the name of an existing buffer. */)
2309 buffer
= Fget_buffer (buffer
);
2310 CHECK_BUFFER (buffer
);
2311 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2316 /* Replace BUFFER with some other buffer in all windows
2317 of all frames, even those on other keyboards. */
2320 replace_buffer_in_all_windows (buffer
)
2324 Lisp_Object tail
, frame
;
2326 /* A single call to window_loop won't do the job
2327 because it only considers frames on the current keyboard.
2328 So loop manually over frames, and handle each one. */
2329 FOR_EACH_FRAME (tail
, frame
)
2330 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2332 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2336 /* Set the height of WINDOW and all its inferiors. */
2338 /* The smallest acceptable dimensions for a window. Anything smaller
2339 might crash Emacs. */
2341 #define MIN_SAFE_WINDOW_WIDTH (2)
2342 #define MIN_SAFE_WINDOW_HEIGHT (1)
2344 /* Make sure that window_min_height and window_min_width are
2345 not too small; if they are, set them to safe minima. */
2348 check_min_window_sizes ()
2350 /* Smaller values might permit a crash. */
2351 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2352 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2353 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2354 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2357 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2358 minimum allowable size. */
2361 check_frame_size (frame
, rows
, cols
)
2365 /* For height, we have to see:
2366 how many windows the frame has at minimum (one or two),
2367 and whether it has a menu bar or other special stuff at the top. */
2369 = ((FRAME_MINIBUF_ONLY_P (frame
) || ! FRAME_HAS_MINIBUF_P (frame
))
2370 ? MIN_SAFE_WINDOW_HEIGHT
2371 : 2 * MIN_SAFE_WINDOW_HEIGHT
);
2373 if (FRAME_TOP_MARGIN (frame
) > 0)
2374 min_height
+= FRAME_TOP_MARGIN (frame
);
2376 if (*rows
< min_height
)
2378 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2379 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2383 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2384 check if W's width can be changed, otherwise check W's height.
2385 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2386 siblings, too. If none of the siblings is resizable, WINDOW isn't
2390 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2392 int width_p
, check_siblings_p
;
2397 if (!NILP (w
->hchild
))
2399 c
= XWINDOW (w
->hchild
);
2403 /* A horiz. combination is fixed-width if all of if its
2405 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2406 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2407 fixed_p
= c
== NULL
;
2411 /* A horiz. combination is fixed-height if one of if its
2413 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2414 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2415 fixed_p
= c
!= NULL
;
2418 else if (!NILP (w
->vchild
))
2420 c
= XWINDOW (w
->vchild
);
2424 /* A vert. combination is fixed-width if one of if its
2426 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2427 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2428 fixed_p
= c
!= NULL
;
2432 /* A vert. combination is fixed-height if all of if its
2434 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2435 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2436 fixed_p
= c
== NULL
;
2439 else if (BUFFERP (w
->buffer
))
2441 if (w
->height_fixed_p
&& !width_p
)
2445 struct buffer
*old
= current_buffer
;
2448 current_buffer
= XBUFFER (w
->buffer
);
2449 val
= find_symbol_value (Qwindow_size_fixed
);
2450 current_buffer
= old
;
2453 if (!EQ (val
, Qunbound
))
2455 fixed_p
= !NILP (val
);
2458 && ((EQ (val
, Qheight
) && width_p
)
2459 || (EQ (val
, Qwidth
) && !width_p
)))
2464 /* Can't tell if this one is resizable without looking at
2465 siblings. If all siblings are fixed-size this one is too. */
2466 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2470 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2471 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2475 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2476 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2490 /* Return the minimum size of window W, not taking fixed-width windows
2491 into account. WIDTH_P non-zero means return the minimum width,
2492 otherwise return the minimum height. If W is a combination window,
2493 compute the minimum size from the minimum sizes of W's children. */
2496 window_min_size_1 (w
, width_p
)
2503 if (!NILP (w
->hchild
))
2505 c
= XWINDOW (w
->hchild
);
2510 /* The min width of a horizontal combination is
2511 the sum of the min widths of its children. */
2514 size
+= window_min_size_1 (c
, width_p
);
2515 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2520 /* The min height a horizontal combination equals
2521 the maximum of all min height of its children. */
2524 int min_size
= window_min_size_1 (c
, width_p
);
2525 size
= max (min_size
, size
);
2526 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2530 else if (!NILP (w
->vchild
))
2532 c
= XWINDOW (w
->vchild
);
2537 /* The min width of a vertical combination is
2538 the maximum of the min widths of its children. */
2541 int min_size
= window_min_size_1 (c
, width_p
);
2542 size
= max (min_size
, size
);
2543 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2548 /* The min height of a vertical combination equals
2549 the sum of the min height of its children. */
2552 size
+= window_min_size_1 (c
, width_p
);
2553 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2560 size
= window_min_width
;
2563 if (MINI_WINDOW_P (w
)
2564 || (!WINDOW_WANTS_MODELINE_P (w
)
2565 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2568 size
= window_min_height
;
2576 /* Return the minimum size of window W, taking fixed-size windows into
2577 account. WIDTH_P non-zero means return the minimum width,
2578 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2579 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2580 unless FIXED is null. */
2583 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2585 int width_p
, ignore_fixed_p
, *fixed
;
2592 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2598 size
= width_p
? XFASTINT (w
->total_cols
) : XFASTINT (w
->total_lines
);
2600 size
= window_min_size_1 (w
, width_p
);
2606 /* Adjust the margins of window W if text area is too small.
2607 Return 1 if window width is ok after adjustment; 0 if window
2608 is still too narrow. */
2611 adjust_window_margins (w
)
2614 int box_cols
= (WINDOW_TOTAL_COLS (w
)
2615 - WINDOW_FRINGE_COLS (w
)
2616 - WINDOW_SCROLL_BAR_COLS (w
));
2617 int margin_cols
= (WINDOW_LEFT_MARGIN_COLS (w
)
2618 + WINDOW_RIGHT_MARGIN_COLS (w
));
2620 if (box_cols
- margin_cols
>= MIN_SAFE_WINDOW_WIDTH
)
2623 if (margin_cols
< 0 || box_cols
< MIN_SAFE_WINDOW_WIDTH
)
2626 /* Window's text area is too narrow, but reducing the window
2627 margins will fix that. */
2628 margin_cols
= box_cols
- MIN_SAFE_WINDOW_WIDTH
;
2629 if (WINDOW_RIGHT_MARGIN_COLS (w
) > 0)
2631 if (WINDOW_LEFT_MARGIN_COLS (w
) > 0)
2632 w
->left_margin_cols
= w
->right_margin_cols
2633 = make_number (margin_cols
/2);
2635 w
->right_margin_cols
= make_number (margin_cols
);
2638 w
->left_margin_cols
= make_number (margin_cols
);
2642 /* Calculate new sizes for windows in the list FORWARD when the window size
2643 goes from TOTAL to SIZE. TOTAL must be greater than SIZE.
2644 The number of windows in FORWARD is NCHILDREN, and the number that
2645 can shrink is SHRINKABLE.
2646 The minimum size a window can have is MIN_SIZE.
2647 If we are shrinking fixed windows, RESIZE_FIXED_P is non-zero.
2648 If we are shrinking columns, WIDTH_P is non-zero, otherwise we are
2651 This function returns an allocated array of new sizes that the caller
2652 must free. The size -1 means the window is fixed and RESIZE_FIXED_P
2653 is zero. Array index 0 refers to the first window in FORWARD, 1 to
2654 the second, and so on.
2656 This function tries to keep windows at least at the minimum size
2657 and resize other windows before it resizes any window to zero (i.e.
2658 delete that window).
2660 Windows are resized proportional to their size, so bigger windows
2661 shrink more than smaller windows. */
2663 shrink_windows (total
, size
, nchildren
, shrinkable
,
2664 min_size
, resize_fixed_p
, forward
, width_p
)
2665 int total
, size
, nchildren
, shrinkable
, min_size
;
2666 int resize_fixed_p
, width_p
;
2667 Lisp_Object forward
;
2669 int available_resize
= 0;
2673 int smallest
= total
;
2674 int total_removed
= 0;
2675 int total_shrink
= total
- size
;
2678 new_sizes
= xmalloc (sizeof (*new_sizes
) * nchildren
);
2680 for (i
= 0, child
= forward
; !NILP (child
); child
= c
->next
, ++i
)
2684 c
= XWINDOW (child
);
2685 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2687 if (! resize_fixed_p
&& window_fixed_size_p (c
, width_p
, 0))
2691 new_sizes
[i
] = child_size
;
2692 if (child_size
> min_size
)
2693 available_resize
+= child_size
- min_size
;
2696 /* We might need to shrink some windows to zero. Find the smallest
2697 windows and set them to 0 until we can fulfil the new size. */
2699 while (shrinkable
> 1 && size
+ available_resize
< total
)
2701 for (i
= 0; i
< nchildren
; ++i
)
2702 if (new_sizes
[i
] > 0 && smallest
> new_sizes
[i
])
2703 smallest
= new_sizes
[i
];
2705 for (i
= 0; i
< nchildren
; ++i
)
2706 if (new_sizes
[i
] == smallest
)
2708 /* Resize this window down to zero. */
2710 if (smallest
> min_size
)
2711 available_resize
-= smallest
- min_size
;
2712 available_resize
+= smallest
;
2714 total_removed
+= smallest
;
2716 /* We don't know what the smallest is now. */
2719 /* Out of for, just remove one window at the time and
2720 check again if we have enough space. */
2725 /* Now, calculate the new sizes. Try to shrink each window
2726 proportional to its size. */
2727 for (i
= 0; i
< nchildren
; ++i
)
2729 if (new_sizes
[i
] > min_size
)
2731 int to_shrink
= total_shrink
*new_sizes
[i
]/total
;
2732 if (new_sizes
[i
] - to_shrink
< min_size
)
2733 to_shrink
= new_sizes
[i
] - min_size
;
2734 new_sizes
[i
] -= to_shrink
;
2735 total_removed
+= to_shrink
;
2739 /* Any reminder due to rounding, we just subtract from windows
2740 that are left and still can be shrunk. */
2741 while (total_shrink
> total_removed
)
2743 int nonzero_sizes
= 0;
2744 int nonzero_idx
= -1;
2746 for (i
= 0; i
< nchildren
; ++i
)
2747 if (new_sizes
[i
] > 0)
2753 for (i
= 0; i
< nchildren
; ++i
)
2754 if (new_sizes
[i
] > min_size
)
2759 /* Out of for, just shrink one window at the time and
2760 check again if we have enough space. */
2765 /* Special case, only one window left. */
2766 if (nonzero_sizes
== 1)
2770 /* Any surplus due to rounding, we add to windows that are left. */
2771 while (total_shrink
< total_removed
)
2773 for (i
= 0; i
< nchildren
; ++i
)
2775 if (new_sizes
[i
] != 0 && total_shrink
< total_removed
)
2787 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2788 WINDOW's width. Resize WINDOW's children, if any, so that they
2789 keep their proportionate size relative to WINDOW. Propagate
2790 WINDOW's top or left edge position to children. Delete windows
2791 that become too small unless NODELETE_P is non-zero.
2793 If NODELETE_P is 2, that means we do delete windows that are
2794 too small, even if they were too small before! */
2797 size_window (window
, size
, width_p
, nodelete_p
)
2799 int size
, width_p
, nodelete_p
;
2801 struct window
*w
= XWINDOW (window
);
2803 Lisp_Object child
, *forward
, *sideward
;
2804 int old_size
, min_size
, safe_min_size
;
2806 /* We test nodelete_p != 2 and nodelete_p != 1 below, so it
2807 seems like it's too soon to do this here. ++KFS. */
2808 if (nodelete_p
== 2)
2811 check_min_window_sizes ();
2812 size
= max (0, size
);
2814 /* If the window has been "too small" at one point,
2815 don't delete it for being "too small" in the future.
2816 Preserve it as long as that is at all possible. */
2819 old_size
= WINDOW_TOTAL_COLS (w
);
2820 min_size
= window_min_width
;
2821 /* Ensure that there is room for the scroll bar and fringes!
2822 We may reduce display margins though. */
2823 safe_min_size
= (MIN_SAFE_WINDOW_WIDTH
2824 + WINDOW_FRINGE_COLS (w
)
2825 + WINDOW_SCROLL_BAR_COLS (w
));
2829 old_size
= XINT (w
->total_lines
);
2830 min_size
= window_min_height
;
2831 safe_min_size
= MIN_SAFE_WINDOW_HEIGHT
;
2834 if (old_size
< min_size
&& nodelete_p
!= 2)
2835 w
->too_small_ok
= Qt
;
2837 /* Maybe delete WINDOW if it's too small. */
2838 if (nodelete_p
!= 1 && !NILP (w
->parent
))
2840 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2841 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2842 if (min_size
< safe_min_size
)
2843 min_size
= safe_min_size
;
2844 if (size
< min_size
)
2846 delete_window (window
);
2851 /* Set redisplay hints. */
2852 w
->last_modified
= make_number (0);
2853 w
->last_overlay_modified
= make_number (0);
2854 windows_or_buffers_changed
++;
2855 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2859 sideward
= &w
->vchild
;
2860 forward
= &w
->hchild
;
2861 w
->total_cols
= make_number (size
);
2862 adjust_window_margins (w
);
2866 sideward
= &w
->hchild
;
2867 forward
= &w
->vchild
;
2868 w
->total_lines
= make_number (size
);
2869 w
->orig_total_lines
= Qnil
;
2872 if (!NILP (*sideward
))
2874 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2876 c
= XWINDOW (child
);
2878 c
->left_col
= w
->left_col
;
2880 c
->top_line
= w
->top_line
;
2881 size_window (child
, size
, width_p
, nodelete_p
);
2884 else if (!NILP (*forward
))
2886 int fixed_size
, each
, extra
, n
;
2887 int resize_fixed_p
, nfixed
;
2888 int last_pos
, first_pos
, nchildren
, total
;
2889 int *new_sizes
= NULL
;
2891 /* Determine the fixed-size portion of the this window, and the
2892 number of child windows. */
2893 fixed_size
= nchildren
= nfixed
= total
= 0;
2894 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2898 c
= XWINDOW (child
);
2899 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2900 total
+= child_size
;
2902 if (window_fixed_size_p (c
, width_p
, 0))
2904 fixed_size
+= child_size
;
2909 /* If the new size is smaller than fixed_size, or if there
2910 aren't any resizable windows, allow resizing fixed-size
2912 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2914 /* Compute how many lines/columns to add/remove to each child. The
2915 value of extra takes care of rounding errors. */
2916 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2917 if (size
< total
&& n
> 1)
2918 new_sizes
= shrink_windows (total
, size
, nchildren
, n
, min_size
,
2919 resize_fixed_p
, *forward
, width_p
);
2922 each
= (size
- total
) / n
;
2923 extra
= (size
- total
) - n
* each
;
2926 /* Compute new children heights and edge positions. */
2927 first_pos
= width_p
? XINT (w
->left_col
) : XINT (w
->top_line
);
2928 last_pos
= first_pos
;
2929 for (n
= 0, child
= *forward
; !NILP (child
); child
= c
->next
, ++n
)
2931 int new_size
, old_size
;
2933 c
= XWINDOW (child
);
2934 old_size
= width_p
? XFASTINT (c
->total_cols
) : XFASTINT (c
->total_lines
);
2935 new_size
= old_size
;
2937 /* The top or left edge position of this child equals the
2938 bottom or right edge of its predecessor. */
2940 c
->left_col
= make_number (last_pos
);
2942 c
->top_line
= make_number (last_pos
);
2944 /* If this child can be resized, do it. */
2945 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2947 new_size
= new_sizes
? new_sizes
[n
] : old_size
+ each
+ extra
;
2951 /* Set new height. Note that size_window also propagates
2952 edge positions to children, so it's not a no-op if we
2953 didn't change the child's size. */
2954 size_window (child
, new_size
, width_p
, 1);
2956 /* Remember the bottom/right edge position of this child; it
2957 will be used to set the top/left edge of the next child. */
2958 last_pos
+= new_size
;
2961 if (new_sizes
) xfree (new_sizes
);
2963 /* We should have covered the parent exactly with child windows. */
2964 xassert (size
== last_pos
- first_pos
);
2966 /* Now delete any children that became too small. */
2968 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2971 c
= XWINDOW (child
);
2972 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2973 size_window (child
, child_size
, width_p
, 2);
2978 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2979 WINDOW's children. NODELETE non-zero means don't delete windows
2980 that become too small in the process. (The caller should check
2981 later and do so if appropriate.) */
2984 set_window_height (window
, height
, nodelete
)
2989 size_window (window
, height
, 0, nodelete
);
2993 /* Set WINDOW's width to WIDTH, and recursively change the width of
2994 WINDOW's children. NODELETE non-zero means don't delete windows
2995 that become too small in the process. (The caller should check
2996 later and do so if appropriate.) */
2999 set_window_width (window
, width
, nodelete
)
3004 size_window (window
, width
, 1, nodelete
);
3007 /* Change window heights in windows rooted in WINDOW by N lines. */
3010 change_window_heights (window
, n
)
3014 struct window
*w
= XWINDOW (window
);
3016 XSETFASTINT (w
->top_line
, XFASTINT (w
->top_line
) + n
);
3017 XSETFASTINT (w
->total_lines
, XFASTINT (w
->total_lines
) - n
);
3019 if (INTEGERP (w
->orig_top_line
))
3020 XSETFASTINT (w
->orig_top_line
, XFASTINT (w
->orig_top_line
) + n
);
3021 if (INTEGERP (w
->orig_total_lines
))
3022 XSETFASTINT (w
->orig_total_lines
, XFASTINT (w
->orig_total_lines
) - n
);
3024 /* Handle just the top child in a vertical split. */
3025 if (!NILP (w
->vchild
))
3026 change_window_heights (w
->vchild
, n
);
3028 /* Adjust all children in a horizontal split. */
3029 for (window
= w
->hchild
; !NILP (window
); window
= w
->next
)
3031 w
= XWINDOW (window
);
3032 change_window_heights (window
, n
);
3037 int window_select_count
;
3040 Fset_window_buffer_unwind (obuf
)
3047 EXFUN (Fset_window_fringes
, 4);
3048 EXFUN (Fset_window_scroll_bars
, 4);
3050 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
3051 means it's allowed to run hooks. See make_frame for a case where
3052 it's not allowed. KEEP_MARGINS_P non-zero means that the current
3053 margins, fringes, and scroll-bar settings of the window are not
3054 reset from the buffer's local settings. */
3057 set_window_buffer (window
, buffer
, run_hooks_p
, keep_margins_p
)
3058 Lisp_Object window
, buffer
;
3059 int run_hooks_p
, keep_margins_p
;
3061 struct window
*w
= XWINDOW (window
);
3062 struct buffer
*b
= XBUFFER (buffer
);
3063 int count
= SPECPDL_INDEX ();
3067 if (EQ (window
, selected_window
))
3068 b
->last_selected_window
= window
;
3070 /* Let redisplay errors through. */
3071 b
->display_error_modiff
= 0;
3073 /* Update time stamps of buffer display. */
3074 if (INTEGERP (b
->display_count
))
3075 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
3076 b
->display_time
= Fcurrent_time ();
3078 XSETFASTINT (w
->window_end_pos
, 0);
3079 XSETFASTINT (w
->window_end_vpos
, 0);
3080 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
3081 w
->window_end_valid
= Qnil
;
3082 w
->hscroll
= w
->min_hscroll
= make_number (0);
3084 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
3085 set_marker_restricted (w
->start
,
3086 make_number (b
->last_window_start
),
3088 w
->start_at_line_beg
= Qnil
;
3089 w
->force_start
= Qnil
;
3090 XSETFASTINT (w
->last_modified
, 0);
3091 XSETFASTINT (w
->last_overlay_modified
, 0);
3092 windows_or_buffers_changed
++;
3094 /* We must select BUFFER for running the window-scroll-functions.
3095 If WINDOW is selected, switch permanently.
3096 Otherwise, switch but go back to the ambient buffer afterward. */
3097 if (EQ (window
, selected_window
))
3098 Fset_buffer (buffer
);
3099 /* We can't check ! NILP (Vwindow_scroll_functions) here
3100 because that might itself be a local variable. */
3101 else if (window_initialized
)
3103 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
3104 Fset_buffer (buffer
);
3107 if (!keep_margins_p
)
3109 /* Set left and right marginal area width etc. from buffer. */
3111 /* This may call adjust_window_margins three times, so
3112 temporarily disable window margins. */
3113 Lisp_Object save_left
= w
->left_margin_cols
;
3114 Lisp_Object save_right
= w
->right_margin_cols
;
3116 w
->left_margin_cols
= w
->right_margin_cols
= Qnil
;
3118 Fset_window_fringes (window
,
3119 b
->left_fringe_width
, b
->right_fringe_width
,
3120 b
->fringes_outside_margins
);
3122 Fset_window_scroll_bars (window
,
3123 b
->scroll_bar_width
,
3124 b
->vertical_scroll_bar_type
, Qnil
);
3126 w
->left_margin_cols
= save_left
;
3127 w
->right_margin_cols
= save_right
;
3129 Fset_window_margins (window
,
3130 b
->left_margin_cols
, b
->right_margin_cols
);
3135 if (! NILP (Vwindow_scroll_functions
))
3136 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
3137 Fmarker_position (w
->start
));
3139 if (! NILP (Vwindow_configuration_change_hook
)
3140 && ! NILP (Vrun_hooks
))
3141 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3144 unbind_to (count
, Qnil
);
3148 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 3, 0,
3149 doc
: /* Make WINDOW display BUFFER as its contents.
3150 BUFFER can be a buffer or the name of an existing buffer.
3151 Optional third arg KEEP-MARGINS non-nil means that WINDOW's current
3152 display margins, fringe widths, and scroll bar settings are maintained;
3153 the default is to reset these from BUFFER's local settings or the frame
3156 This function runs the hook `window-scroll-functions'. */)
3157 (window
, buffer
, keep_margins
)
3158 register Lisp_Object window
, buffer
, keep_margins
;
3160 register Lisp_Object tem
;
3161 register struct window
*w
= decode_window (window
);
3163 XSETWINDOW (window
, w
);
3164 buffer
= Fget_buffer (buffer
);
3165 CHECK_BUFFER (buffer
);
3167 if (NILP (XBUFFER (buffer
)->name
))
3168 error ("Attempt to display deleted buffer");
3172 error ("Window is deleted");
3173 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
3174 is first being set up. */
3176 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
3177 error ("Window is dedicated to `%s'",
3178 SDATA (XBUFFER (tem
)->name
));
3183 set_window_buffer (window
, buffer
, 1, !NILP (keep_margins
));
3187 /* Note that selected_window can be nil
3188 when this is called from Fset_window_configuration. */
3190 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 2, 0,
3191 doc
: /* Select WINDOW. Most editing will apply to WINDOW's buffer.
3192 If WINDOW is not already selected, make WINDOW's buffer current
3193 and make WINDOW the frame's selected window. Return WINDOW.
3194 Optional second arg NORECORD non-nil means
3195 do not put this buffer at the front of the list of recently selected ones.
3197 Note that the main editor command loop
3198 selects the buffer of the selected window before each command. */)
3200 register Lisp_Object window
, norecord
;
3202 register struct window
*w
;
3203 register struct window
*ow
;
3206 CHECK_LIVE_WINDOW (window
);
3208 w
= XWINDOW (window
);
3209 w
->frozen_window_start_p
= 0;
3211 ++window_select_count
;
3212 XSETFASTINT (w
->use_time
, window_select_count
);
3213 if (EQ (window
, selected_window
))
3216 /* Store the current buffer's actual point into the
3217 old selected window. It belongs to that window,
3218 and when the window is not selected, must be in the window. */
3219 if (!NILP (selected_window
))
3221 ow
= XWINDOW (selected_window
);
3222 if (! NILP (ow
->buffer
))
3223 set_marker_both (ow
->pointm
, ow
->buffer
,
3224 BUF_PT (XBUFFER (ow
->buffer
)),
3225 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
3228 selected_window
= window
;
3229 sf
= SELECTED_FRAME ();
3230 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
3232 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
3233 /* Use this rather than Fhandle_switch_frame
3234 so that FRAME_FOCUS_FRAME is moved appropriately as we
3235 move around in the state where a minibuffer in a separate
3237 Fselect_frame (WINDOW_FRAME (w
));
3240 sf
->selected_window
= window
;
3242 if (NILP (norecord
))
3243 record_buffer (w
->buffer
);
3244 Fset_buffer (w
->buffer
);
3246 XBUFFER (w
->buffer
)->last_selected_window
= window
;
3248 /* Go to the point recorded in the window.
3249 This is important when the buffer is in more
3250 than one window. It also matters when
3251 redisplay_window has altered point after scrolling,
3252 because it makes the change only in the window. */
3254 register int new_point
= marker_position (w
->pointm
);
3255 if (new_point
< BEGV
)
3257 else if (new_point
> ZV
)
3263 windows_or_buffers_changed
++;
3268 select_window_norecord (window
)
3271 return Fselect_window (window
, Qt
);
3274 /* Deiconify the frame containing the window WINDOW,
3275 unless it is the selected frame;
3278 The reason for the exception for the selected frame
3279 is that it seems better not to change the selected frames visibility
3280 merely because of displaying a different buffer in it.
3281 The deiconification is useful when a buffer gets shown in
3282 another frame that you were not using lately. */
3285 display_buffer_1 (window
)
3288 Lisp_Object frame
= XWINDOW (window
)->frame
;
3289 FRAME_PTR f
= XFRAME (frame
);
3291 FRAME_SAMPLE_VISIBILITY (f
);
3293 if (EQ (frame
, selected_frame
))
3294 ; /* Assume the selected frame is already visible enough. */
3295 else if (minibuf_level
> 0
3296 && MINI_WINDOW_P (XWINDOW (selected_window
))
3297 && WINDOW_LIVE_P (minibuf_selected_window
)
3298 && EQ (frame
, WINDOW_FRAME (XWINDOW (minibuf_selected_window
))))
3299 ; /* Assume the frame from which we invoked the minibuffer is visible. */
3302 if (FRAME_ICONIFIED_P (f
))
3303 Fmake_frame_visible (frame
);
3304 else if (FRAME_VISIBLE_P (f
))
3305 Fraise_frame (frame
);
3311 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
3312 doc
: /* Returns non-nil if a buffer named BUFFER-NAME gets a special frame.
3313 If the value is t, `display-buffer' or `pop-to-buffer' would create a
3314 special frame for that buffer using the default frame parameters.
3316 If the value is a list, it is a list of frame parameters that would be used
3317 to make a frame for that buffer.
3318 The variables `special-display-buffer-names'
3319 and `special-display-regexps' control this. */)
3321 Lisp_Object buffer_name
;
3325 CHECK_STRING (buffer_name
);
3327 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
3331 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
3335 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3337 Lisp_Object car
= XCAR (tem
);
3339 && fast_string_match (car
, buffer_name
) >= 0)
3341 else if (CONSP (car
)
3342 && STRINGP (XCAR (car
))
3343 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3349 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
3350 doc
: /* Returns non-nil if a buffer named BUFFER-NAME would use the same window.
3351 More precisely, if `display-buffer' or `pop-to-buffer' would display
3352 that buffer in the selected window rather than (as usual) in some other window.
3353 See `same-window-buffer-names' and `same-window-regexps'. */)
3355 Lisp_Object buffer_name
;
3359 CHECK_STRING (buffer_name
);
3361 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
3365 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
3369 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3371 Lisp_Object car
= XCAR (tem
);
3373 && fast_string_match (car
, buffer_name
) >= 0)
3375 else if (CONSP (car
)
3376 && STRINGP (XCAR (car
))
3377 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3383 /* Use B so the default is (other-buffer). */
3384 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
3385 "BDisplay buffer: \nP",
3386 doc
: /* Make BUFFER appear in some window but don't select it.
3387 BUFFER must be the name of an existing buffer, or, when called from Lisp,
3389 If BUFFER is shown already in some window, just use that one,
3390 unless the window is the selected window and the optional second
3391 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).
3392 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.
3393 Returns the window displaying BUFFER.
3394 If `display-buffer-reuse-frames' is non-nil, and another frame is currently
3395 displaying BUFFER, then simply raise that frame.
3397 The variables `special-display-buffer-names',
3398 `special-display-regexps', `same-window-buffer-names', and
3399 `same-window-regexps' customize how certain buffer names are handled.
3400 The latter two take effect only if NOT-THIS-WINDOW is t.
3402 If optional argument FRAME is `visible', search all visible frames.
3403 If FRAME is 0, search all visible and iconified frames.
3404 If FRAME is t, search all frames.
3405 If FRAME is a frame, search only that frame.
3406 If FRAME is nil, search only the selected frame
3407 (actually the last nonminibuffer frame),
3408 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,
3409 which means search visible and iconified frames.
3411 If a full-width window on a splittable frame is available to display
3412 the buffer, it may be split, subject to the value of the variable
3413 `split-height-threshold'.
3415 If `even-window-heights' is non-nil, window heights will be evened out
3416 if displaying the buffer causes two vertically adjacent windows to be
3418 (buffer
, not_this_window
, frame
)
3419 register Lisp_Object buffer
, not_this_window
, frame
;
3421 register Lisp_Object window
, tem
, swp
;
3425 buffer
= Fget_buffer (buffer
);
3426 CHECK_BUFFER (buffer
);
3428 if (!NILP (Vdisplay_buffer_function
))
3429 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
3431 if (NILP (not_this_window
)
3432 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
3433 return display_buffer_1 (selected_window
);
3435 /* See if the user has specified this buffer should appear
3436 in the selected window. */
3437 if (NILP (not_this_window
))
3439 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
3440 if (!NILP (swp
) && !no_switch_window (selected_window
))
3442 Fswitch_to_buffer (buffer
, Qnil
);
3443 return display_buffer_1 (selected_window
);
3447 /* If the user wants pop-up-frames or display-buffer-reuse-frames,
3448 look for a window showing BUFFER on any visible or iconified frame.
3449 Otherwise search only the current frame. */
3452 else if (pop_up_frames
3453 || display_buffer_reuse_frames
3454 || last_nonminibuf_frame
== 0)
3455 XSETFASTINT (tem
, 0);
3457 XSETFRAME (tem
, last_nonminibuf_frame
);
3459 window
= Fget_buffer_window (buffer
, tem
);
3461 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
3462 return display_buffer_1 (window
);
3464 /* Certain buffer names get special handling. */
3465 if (!NILP (Vspecial_display_function
) && NILP (swp
))
3467 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
3469 return call1 (Vspecial_display_function
, buffer
);
3471 return call2 (Vspecial_display_function
, buffer
, tem
);
3474 /* If there are no frames open that have more than a minibuffer,
3475 we need to create a new frame. */
3476 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
3478 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3479 Fset_window_buffer (window
, buffer
, Qnil
);
3480 return display_buffer_1 (window
);
3483 f
= SELECTED_FRAME ();
3485 || FRAME_MINIBUF_ONLY_P (f
)
3486 /* If the current frame is a special display frame,
3487 don't try to reuse its windows. */
3488 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
3493 if (FRAME_MINIBUF_ONLY_P (f
))
3494 XSETFRAME (frames
, last_nonminibuf_frame
);
3495 /* Don't try to create a window if we would get an error. */
3496 if (split_height_threshold
< window_min_height
<< 1)
3497 split_height_threshold
= window_min_height
<< 1;
3499 /* Note that both Fget_largest_window and Fget_lru_window
3500 ignore minibuffers and dedicated windows.
3501 This means they can return nil. */
3503 /* If the frame we would try to split cannot be split,
3504 try other frames. */
3505 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
3507 /* Try visible frames first. */
3508 window
= Fget_largest_window (Qvisible
);
3509 /* If that didn't work, try iconified frames. */
3511 window
= Fget_largest_window (make_number (0));
3513 window
= Fget_largest_window (Qt
);
3516 window
= Fget_largest_window (frames
);
3518 /* If we got a tall enough full-width window that can be split,
3521 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3522 && window_height (window
) >= split_height_threshold
3523 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
3524 window
= Fsplit_window (window
, Qnil
, Qnil
);
3527 Lisp_Object upper
, lower
, other
;
3529 window
= Fget_lru_window (frames
);
3530 /* If the LRU window is selected, and big enough,
3531 and can be split, split it. */
3533 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3534 && (EQ (window
, selected_window
)
3535 || EQ (XWINDOW (window
)->parent
, Qnil
))
3536 && window_height (window
) >= window_min_height
<< 1)
3537 window
= Fsplit_window (window
, Qnil
, Qnil
);
3538 /* If Fget_lru_window returned nil, try other approaches. */
3540 /* Try visible frames first. */
3542 window
= Fget_buffer_window (buffer
, Qvisible
);
3544 window
= Fget_largest_window (Qvisible
);
3545 /* If that didn't work, try iconified frames. */
3547 window
= Fget_buffer_window (buffer
, make_number (0));
3549 window
= Fget_largest_window (make_number (0));
3550 /* Try invisible frames. */
3552 window
= Fget_buffer_window (buffer
, Qt
);
3554 window
= Fget_largest_window (Qt
);
3555 /* As a last resort, make a new frame. */
3557 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3558 /* If window appears above or below another,
3559 even out their heights. */
3560 other
= upper
= lower
= Qnil
;
3561 if (!NILP (XWINDOW (window
)->prev
))
3562 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3563 if (!NILP (XWINDOW (window
)->next
))
3564 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3566 && !NILP (Veven_window_heights
)
3567 /* Check that OTHER and WINDOW are vertically arrayed. */
3568 && !EQ (XWINDOW (other
)->top_line
, XWINDOW (window
)->top_line
)
3569 && (XFASTINT (XWINDOW (other
)->total_lines
)
3570 > XFASTINT (XWINDOW (window
)->total_lines
)))
3572 int total
= (XFASTINT (XWINDOW (other
)->total_lines
)
3573 + XFASTINT (XWINDOW (window
)->total_lines
));
3574 enlarge_window (upper
,
3575 total
/ 2 - XFASTINT (XWINDOW (upper
)->total_lines
),
3581 window
= Fget_lru_window (Qnil
);
3583 Fset_window_buffer (window
, buffer
, Qnil
);
3584 return display_buffer_1 (window
);
3588 DEFUN ("force-window-update", Fforce_window_update
, Sforce_window_update
,
3590 doc
: /* Force redisplay of all windows.
3591 If optional arg OBJECT is a window, force redisplay of that window only.
3592 If OBJECT is a buffer or buffer name, force redisplay of all windows
3593 displaying that buffer. */)
3599 windows_or_buffers_changed
++;
3600 update_mode_lines
++;
3604 if (WINDOWP (object
))
3606 struct window
*w
= XWINDOW (object
);
3607 mark_window_display_accurate (object
, 0);
3608 w
->update_mode_line
= Qt
;
3609 if (BUFFERP (w
->buffer
))
3610 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
3611 ++update_mode_lines
;
3615 if (STRINGP (object
))
3616 object
= Fget_buffer (object
);
3617 if (BUFFERP (object
) && !NILP (XBUFFER (object
)->name
))
3619 /* Walk all windows looking for buffer, and force update
3620 of each of those windows. */
3622 object
= window_loop (REDISPLAY_BUFFER_WINDOWS
, object
, 0, Qvisible
);
3623 return NILP (object
) ? Qnil
: Qt
;
3626 /* If nothing suitable was found, just return.
3627 We could signal an error, but this feature will typically be used
3628 asynchronously in timers or process sentinels, so we don't. */
3634 temp_output_buffer_show (buf
)
3635 register Lisp_Object buf
;
3637 register struct buffer
*old
= current_buffer
;
3638 register Lisp_Object window
;
3639 register struct window
*w
;
3641 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3644 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3648 #if 0 /* rms: there should be no reason for this. */
3649 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3651 set_buffer_internal (old
);
3653 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3654 call1 (Vtemp_buffer_show_function
, buf
);
3657 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3659 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3660 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3661 Vminibuf_scroll_window
= window
;
3662 w
= XWINDOW (window
);
3663 XSETFASTINT (w
->hscroll
, 0);
3664 XSETFASTINT (w
->min_hscroll
, 0);
3665 set_marker_restricted_both (w
->start
, buf
, BEG
, BEG
);
3666 set_marker_restricted_both (w
->pointm
, buf
, BEG
, BEG
);
3668 /* Run temp-buffer-show-hook, with the chosen window selected
3669 and its buffer current. */
3671 if (!NILP (Vrun_hooks
)
3672 && !NILP (Fboundp (Qtemp_buffer_show_hook
))
3673 && !NILP (Fsymbol_value (Qtemp_buffer_show_hook
)))
3675 int count
= SPECPDL_INDEX ();
3676 Lisp_Object prev_window
, prev_buffer
;
3677 prev_window
= selected_window
;
3678 XSETBUFFER (prev_buffer
, old
);
3680 /* Select the window that was chosen, for running the hook.
3681 Note: Both Fselect_window and select_window_norecord may
3682 set-buffer to the buffer displayed in the window,
3683 so we need to save the current buffer. --stef */
3684 record_unwind_protect (Fset_buffer
, prev_buffer
);
3685 record_unwind_protect (select_window_norecord
, prev_window
);
3686 Fselect_window (window
, Qt
);
3687 Fset_buffer (w
->buffer
);
3688 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3689 unbind_to (count
, Qnil
);
3695 make_dummy_parent (window
)
3699 register struct window
*o
, *p
;
3702 o
= XWINDOW (window
);
3703 p
= allocate_window ();
3704 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3705 ((struct Lisp_Vector
*) p
)->contents
[i
]
3706 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3707 XSETWINDOW (new, p
);
3710 XSETFASTINT (p
->sequence_number
, sequence_number
);
3712 /* Put new into window structure in place of window */
3713 replace_window (window
, new);
3726 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3727 doc
: /* Split WINDOW, putting SIZE lines in the first of the pair.
3728 WINDOW defaults to selected one and SIZE to half its size.
3729 If optional third arg HORFLAG is non-nil, split side by side
3730 and put SIZE columns in the first of the pair. In that case,
3731 SIZE includes that window's scroll bar, or the divider column to its right.
3732 Interactively, all arguments are nil.
3734 Returns the newly created window (which is the lower or rightmost one).
3735 The upper or leftmost window is the original one and remains selected.
3736 See Info node `(elisp)Splitting Windows' for more details and examples.*/)
3737 (window
, size
, horflag
)
3738 Lisp_Object window
, size
, horflag
;
3740 register Lisp_Object
new;
3741 register struct window
*o
, *p
;
3743 register int size_int
;
3746 window
= selected_window
;
3748 CHECK_LIVE_WINDOW (window
);
3750 o
= XWINDOW (window
);
3751 fo
= XFRAME (WINDOW_FRAME (o
));
3755 if (!NILP (horflag
))
3756 /* Calculate the size of the left-hand window, by dividing
3757 the usable space in columns by two.
3758 We round up, since the left-hand window may include
3759 a dividing line, while the right-hand may not. */
3760 size_int
= (XFASTINT (o
->total_cols
) + 1) >> 1;
3762 size_int
= XFASTINT (o
->total_lines
) >> 1;
3766 CHECK_NUMBER (size
);
3767 size_int
= XINT (size
);
3770 if (MINI_WINDOW_P (o
))
3771 error ("Attempt to split minibuffer window");
3772 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3773 error ("Attempt to split fixed-size window");
3775 check_min_window_sizes ();
3779 if (size_int
< window_min_height
)
3780 error ("Window height %d too small (after splitting)", size_int
);
3781 if (size_int
+ window_min_height
> XFASTINT (o
->total_lines
))
3782 error ("Window height %d too small (after splitting)",
3783 XFASTINT (o
->total_lines
) - size_int
);
3784 if (NILP (o
->parent
)
3785 || NILP (XWINDOW (o
->parent
)->vchild
))
3787 make_dummy_parent (window
);
3789 XWINDOW (new)->vchild
= window
;
3794 if (size_int
< window_min_width
)
3795 error ("Window width %d too small (after splitting)", size_int
);
3797 if (size_int
+ window_min_width
> XFASTINT (o
->total_cols
))
3798 error ("Window width %d too small (after splitting)",
3799 XFASTINT (o
->total_cols
) - size_int
);
3800 if (NILP (o
->parent
)
3801 || NILP (XWINDOW (o
->parent
)->hchild
))
3803 make_dummy_parent (window
);
3805 XWINDOW (new)->hchild
= window
;
3809 /* Now we know that window's parent is a vertical combination
3810 if we are dividing vertically, or a horizontal combination
3811 if we are making side-by-side windows */
3813 windows_or_buffers_changed
++;
3814 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3815 new = make_window ();
3818 p
->frame
= o
->frame
;
3820 if (!NILP (p
->next
))
3821 XWINDOW (p
->next
)->prev
= new;
3824 p
->parent
= o
->parent
;
3826 p
->window_end_valid
= Qnil
;
3827 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3829 /* Duplicate special geometry settings. */
3831 p
->left_margin_cols
= o
->left_margin_cols
;
3832 p
->right_margin_cols
= o
->right_margin_cols
;
3833 p
->left_fringe_width
= o
->left_fringe_width
;
3834 p
->right_fringe_width
= o
->right_fringe_width
;
3835 p
->fringes_outside_margins
= o
->fringes_outside_margins
;
3836 p
->scroll_bar_width
= o
->scroll_bar_width
;
3837 p
->vertical_scroll_bar_type
= o
->vertical_scroll_bar_type
;
3839 /* Apportion the available frame space among the two new windows */
3841 if (!NILP (horflag
))
3843 p
->total_lines
= o
->total_lines
;
3844 p
->top_line
= o
->top_line
;
3845 XSETFASTINT (p
->total_cols
, XFASTINT (o
->total_cols
) - size_int
);
3846 XSETFASTINT (o
->total_cols
, size_int
);
3847 XSETFASTINT (p
->left_col
, XFASTINT (o
->left_col
) + size_int
);
3848 adjust_window_margins (p
);
3849 adjust_window_margins (o
);
3853 p
->left_col
= o
->left_col
;
3854 p
->total_cols
= o
->total_cols
;
3855 XSETFASTINT (p
->total_lines
, XFASTINT (o
->total_lines
) - size_int
);
3856 XSETFASTINT (o
->total_lines
, size_int
);
3857 XSETFASTINT (p
->top_line
, XFASTINT (o
->top_line
) + size_int
);
3860 /* Adjust glyph matrices. */
3863 Fset_window_buffer (new, o
->buffer
, Qt
);
3867 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 3, "p",
3868 doc
: /* Make current window ARG lines bigger.
3869 From program, optional second arg non-nil means grow sideways ARG columns.
3870 Interactively, if an argument is not given, make the window one line bigger.
3872 Optional third arg PRESERVE-BEFORE, if non-nil, means do not change the size
3873 of the siblings above or to the left of the selected window. Only
3874 siblings to the right or below are changed. */)
3875 (arg
, side
, preserve_before
)
3876 register Lisp_Object arg
, side
, preserve_before
;
3879 enlarge_window (selected_window
, XINT (arg
), !NILP (side
),
3880 !NILP (preserve_before
));
3882 if (! NILP (Vwindow_configuration_change_hook
))
3883 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3888 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 3, "p",
3889 doc
: /* Make current window ARG lines smaller.
3890 From program, optional second arg non-nil means shrink sideways arg columns.
3891 Interactively, if an argument is not given, make the window one line smaller.
3893 Optional third arg PRESERVE-BEFORE, if non-nil, means do not change the size
3894 of the siblings above or to the left of the selected window. Only
3895 siblings to the right or below are changed. */)
3896 (arg
, side
, preserve_before
)
3897 register Lisp_Object arg
, side
, preserve_before
;
3900 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
),
3901 !NILP (preserve_before
));
3903 if (! NILP (Vwindow_configuration_change_hook
))
3904 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3910 window_height (window
)
3913 register struct window
*p
= XWINDOW (window
);
3914 return WINDOW_TOTAL_LINES (p
);
3918 window_width (window
)
3921 register struct window
*p
= XWINDOW (window
);
3922 return WINDOW_TOTAL_COLS (p
);
3927 *(widthflag ? &(XWINDOW (w)->left_col) : &(XWINDOW (w)->top_line))
3929 #define CURSIZE(w) \
3930 *(widthflag ? &(XWINDOW (w)->total_cols) : &(XWINDOW (w)->total_lines))
3933 /* Enlarge WINDOW by DELTA. WIDTHFLAG non-zero means
3934 increase its width. Siblings of the selected window are resized to
3935 fulfill the size request. If they become too small in the process,
3936 they will be deleted.
3938 If PRESERVE_BEFORE is nonzero, that means don't alter
3939 the siblings to the left or above WINDOW. */
3942 enlarge_window (window
, delta
, widthflag
, preserve_before
)
3944 int delta
, widthflag
, preserve_before
;
3946 Lisp_Object parent
, next
, prev
;
3950 int (*sizefun
) P_ ((Lisp_Object
))
3951 = widthflag
? window_width
: window_height
;
3952 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3953 = (widthflag
? set_window_width
: set_window_height
);
3955 /* Check values of window_min_width and window_min_height for
3957 check_min_window_sizes ();
3959 /* Give up if this window cannot be resized. */
3960 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3961 error ("Window is not resizable");
3963 /* Find the parent of the selected window. */
3966 p
= XWINDOW (window
);
3972 error ("No other window to side of this one");
3977 ? !NILP (XWINDOW (parent
)->hchild
)
3978 : !NILP (XWINDOW (parent
)->vchild
))
3984 sizep
= &CURSIZE (window
);
3987 register int maxdelta
;
3989 /* Compute the maximum size increment this window can have. */
3991 if (preserve_before
)
3995 maxdelta
= (*sizefun
) (parent
) - XINT (*sizep
);
3996 /* Subtract size of siblings before, since we can't take that. */
3997 maxdelta
-= XINT (CURBEG (window
)) - XINT (CURBEG (parent
));
4000 maxdelta
= (!NILP (p
->next
) ? ((*sizefun
) (p
->next
)
4001 - window_min_size (XWINDOW (p
->next
),
4006 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
4007 /* This is a main window followed by a minibuffer. */
4008 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
4009 - window_min_size (XWINDOW (p
->next
),
4011 /* This is a minibuffer following a main window. */
4012 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
4013 - window_min_size (XWINDOW (p
->prev
),
4015 /* This is a frame with only one window, a minibuffer-only
4016 or a minibufferless frame. */
4019 if (delta
> maxdelta
)
4020 /* This case traps trying to make the minibuffer
4021 the full frame, or make the only window aside from the
4022 minibuffer the full frame. */
4026 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
4028 delete_window (window
);
4035 /* Find the total we can get from other siblings without deleting them. */
4037 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
4038 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
4040 if (! preserve_before
)
4041 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
4042 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
4045 /* If we can get it all from them without deleting them, do so. */
4046 if (delta
<= maximum
)
4048 Lisp_Object first_unaffected
;
4049 Lisp_Object first_affected
;
4054 first_affected
= window
;
4055 /* Look at one sibling at a time,
4056 moving away from this window in both directions alternately,
4057 and take as much as we can get without deleting that sibling. */
4059 && (!NILP (next
) || (!preserve_before
&& !NILP (prev
))))
4063 int this_one
= ((*sizefun
) (next
)
4064 - window_min_size (XWINDOW (next
),
4065 widthflag
, 0, &fixed_p
));
4068 if (this_one
> delta
)
4071 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
4072 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4077 next
= XWINDOW (next
)->next
;
4083 if (!preserve_before
&& ! NILP (prev
))
4085 int this_one
= ((*sizefun
) (prev
)
4086 - window_min_size (XWINDOW (prev
),
4087 widthflag
, 0, &fixed_p
));
4090 if (this_one
> delta
)
4093 first_affected
= prev
;
4095 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
4096 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4101 prev
= XWINDOW (prev
)->prev
;
4105 xassert (delta
== 0);
4107 /* Now recalculate the edge positions of all the windows affected,
4108 based on the new sizes. */
4109 first_unaffected
= next
;
4110 prev
= first_affected
;
4111 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
4112 prev
= next
, next
= XWINDOW (next
)->next
)
4114 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
4115 /* This does not change size of NEXT,
4116 but it propagates the new top edge to its children */
4117 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
4122 register int delta1
;
4123 register int opht
= (*sizefun
) (parent
);
4125 if (opht
<= XINT (*sizep
) + delta
)
4127 /* If trying to grow this window to or beyond size of the parent,
4128 just delete all the sibling windows. */
4129 Lisp_Object start
, tem
, next
;
4131 start
= XWINDOW (parent
)->vchild
;
4133 start
= XWINDOW (parent
)->hchild
;
4135 /* Delete any siblings that come after WINDOW. */
4136 tem
= XWINDOW (window
)->next
;
4137 while (! NILP (tem
))
4139 next
= XWINDOW (tem
)->next
;
4140 delete_window (tem
);
4144 /* Delete any siblings that come after WINDOW.
4145 Note that if START is not WINDOW, then WINDOW still
4146 Fhas siblings, so WINDOW has not yet replaced its parent. */
4148 while (! EQ (tem
, window
))
4150 next
= XWINDOW (tem
)->next
;
4151 delete_window (tem
);
4157 /* Otherwise, make delta1 just right so that if we add
4158 delta1 lines to this window and to the parent, and then
4159 shrink the parent back to its original size, the new
4160 proportional size of this window will increase by delta.
4162 The function size_window will compute the new height h'
4163 of the window from delta1 as:
4166 x = delta1 - delta1/n * n for the 1st resizable child
4169 where n is the number of children that can be resized.
4170 We can ignore x by choosing a delta1 that is a multiple of
4171 n. We want the height of this window to come out as
4181 The number of children n equals the number of resizable
4182 children of this window + 1 because we know window itself
4183 is resizable (otherwise we would have signalled an error. */
4185 struct window
*w
= XWINDOW (window
);
4189 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
4190 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
4192 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
4193 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
4198 /* Add delta1 lines or columns to this window, and to the parent,
4199 keeping things consistent while not affecting siblings. */
4200 XSETINT (CURSIZE (parent
), opht
+ delta1
);
4201 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
4203 /* Squeeze out delta1 lines or columns from our parent,
4204 shriking this window and siblings proportionately.
4205 This brings parent back to correct size.
4206 Delta1 was calculated so this makes this window the desired size,
4207 taking it all out of the siblings. */
4208 (*setsizefun
) (parent
, opht
, 0);
4213 XSETFASTINT (p
->last_modified
, 0);
4214 XSETFASTINT (p
->last_overlay_modified
, 0);
4216 /* Adjust glyph matrices. */
4217 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4225 /***********************************************************************
4226 Resizing Mini-Windows
4227 ***********************************************************************/
4229 static void shrink_window_lowest_first
P_ ((struct window
*, int));
4231 enum save_restore_action
4238 static int save_restore_orig_size
P_ ((struct window
*,
4239 enum save_restore_action
));
4241 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
4242 from lowest windows first. */
4245 shrink_window_lowest_first (w
, height
)
4253 xassert (!MINI_WINDOW_P (w
));
4255 /* Set redisplay hints. */
4256 XSETFASTINT (w
->last_modified
, 0);
4257 XSETFASTINT (w
->last_overlay_modified
, 0);
4258 windows_or_buffers_changed
++;
4259 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
4261 old_height
= XFASTINT (w
->total_lines
);
4262 XSETFASTINT (w
->total_lines
, height
);
4264 if (!NILP (w
->hchild
))
4266 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
4268 c
= XWINDOW (child
);
4269 c
->top_line
= w
->top_line
;
4270 shrink_window_lowest_first (c
, height
);
4273 else if (!NILP (w
->vchild
))
4275 Lisp_Object last_child
;
4276 int delta
= old_height
- height
;
4281 /* Find the last child. We are taking space from lowest windows
4282 first, so we iterate over children from the last child
4284 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
4287 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
4288 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
4292 c
= XWINDOW (child
);
4293 this_one
= XFASTINT (c
->total_lines
) - MIN_SAFE_WINDOW_HEIGHT
;
4295 if (this_one
> delta
)
4298 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
) - this_one
);
4302 /* Compute new positions. */
4303 last_top
= XINT (w
->top_line
);
4304 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
4306 c
= XWINDOW (child
);
4307 c
->top_line
= make_number (last_top
);
4308 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
));
4309 last_top
+= XFASTINT (c
->total_lines
);
4315 /* Save, restore, or check positions and sizes in the window tree
4316 rooted at W. ACTION says what to do.
4318 If ACTION is CHECK_ORIG_SIZES, check if orig_top_line and
4319 orig_total_lines members are valid for all windows in the window
4320 tree. Value is non-zero if they are valid.
4322 If ACTION is SAVE_ORIG_SIZES, save members top and height in
4323 orig_top_line and orig_total_lines for all windows in the tree.
4325 If ACTION is RESTORE_ORIG_SIZES, restore top and height from values
4326 stored in orig_top_line and orig_total_lines for all windows. */
4329 save_restore_orig_size (w
, action
)
4331 enum save_restore_action action
;
4337 if (!NILP (w
->hchild
))
4339 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
4342 else if (!NILP (w
->vchild
))
4344 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
4350 case CHECK_ORIG_SIZES
:
4351 if (!INTEGERP (w
->orig_top_line
) || !INTEGERP (w
->orig_total_lines
))
4355 case SAVE_ORIG_SIZES
:
4356 w
->orig_top_line
= w
->top_line
;
4357 w
->orig_total_lines
= w
->total_lines
;
4358 XSETFASTINT (w
->last_modified
, 0);
4359 XSETFASTINT (w
->last_overlay_modified
, 0);
4362 case RESTORE_ORIG_SIZES
:
4363 xassert (INTEGERP (w
->orig_top_line
) && INTEGERP (w
->orig_total_lines
));
4364 w
->top_line
= w
->orig_top_line
;
4365 w
->total_lines
= w
->orig_total_lines
;
4366 w
->orig_total_lines
= w
->orig_top_line
= Qnil
;
4367 XSETFASTINT (w
->last_modified
, 0);
4368 XSETFASTINT (w
->last_overlay_modified
, 0);
4375 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
4382 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
4383 without deleting other windows. */
4386 grow_mini_window (w
, delta
)
4390 struct frame
*f
= XFRAME (w
->frame
);
4391 struct window
*root
;
4393 xassert (MINI_WINDOW_P (w
));
4394 xassert (delta
>= 0);
4396 /* Check values of window_min_width and window_min_height for
4398 check_min_window_sizes ();
4400 /* Compute how much we can enlarge the mini-window without deleting
4402 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4405 int min_height
= window_min_size (root
, 0, 0, 0);
4406 if (XFASTINT (root
->total_lines
) - delta
< min_height
)
4407 /* Note that the root window may already be smaller than
4409 delta
= max (0, XFASTINT (root
->total_lines
) - min_height
);
4414 /* Save original window sizes and positions, if not already done. */
4415 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4416 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
4418 /* Shrink other windows. */
4419 shrink_window_lowest_first (root
, XFASTINT (root
->total_lines
) - delta
);
4421 /* Grow the mini-window. */
4422 w
->top_line
= make_number (XFASTINT (root
->top_line
) + XFASTINT (root
->total_lines
));
4423 w
->total_lines
= make_number (XFASTINT (w
->total_lines
) + delta
);
4424 XSETFASTINT (w
->last_modified
, 0);
4425 XSETFASTINT (w
->last_overlay_modified
, 0);
4432 /* Shrink mini-window W. If there is recorded info about window sizes
4433 before a call to grow_mini_window, restore recorded window sizes.
4434 Otherwise, if the mini-window is higher than 1 line, resize it to 1
4438 shrink_mini_window (w
)
4441 struct frame
*f
= XFRAME (w
->frame
);
4442 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4444 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4446 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
4448 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4449 windows_or_buffers_changed
= 1;
4451 else if (XFASTINT (w
->total_lines
) > 1)
4453 /* Distribute the additional lines of the mini-window
4454 among the other windows. */
4456 XSETWINDOW (window
, w
);
4457 enlarge_window (window
, 1 - XFASTINT (w
->total_lines
), 0, 0);
4463 /* Mark window cursors off for all windows in the window tree rooted
4464 at W by setting their phys_cursor_on_p flag to zero. Called from
4465 xterm.c, e.g. when a frame is cleared and thereby all cursors on
4466 the frame are cleared. */
4469 mark_window_cursors_off (w
)
4474 if (!NILP (w
->hchild
))
4475 mark_window_cursors_off (XWINDOW (w
->hchild
));
4476 else if (!NILP (w
->vchild
))
4477 mark_window_cursors_off (XWINDOW (w
->vchild
));
4479 w
->phys_cursor_on_p
= 0;
4481 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4486 /* Return number of lines of text (not counting mode lines) in W. */
4489 window_internal_height (w
)
4492 int ht
= XFASTINT (w
->total_lines
);
4494 if (!MINI_WINDOW_P (w
))
4496 if (!NILP (w
->parent
)
4497 || !NILP (w
->vchild
)
4498 || !NILP (w
->hchild
)
4501 || WINDOW_WANTS_MODELINE_P (w
))
4504 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4512 /* Return the number of columns in W.
4513 Don't count columns occupied by scroll bars or the vertical bar
4514 separating W from the sibling to its right. */
4517 window_box_text_cols (w
)
4520 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4521 int width
= XINT (w
->total_cols
);
4523 if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w
))
4524 /* Scroll bars occupy a few columns. */
4525 width
-= WINDOW_CONFIG_SCROLL_BAR_COLS (w
);
4526 else if (!FRAME_WINDOW_P (f
)
4527 && !WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
4528 /* The column of `|' characters separating side-by-side windows
4529 occupies one column only. */
4532 if (FRAME_WINDOW_P (f
))
4533 /* On window-systems, fringes and display margins cannot be
4534 used for normal text. */
4535 width
-= (WINDOW_FRINGE_COLS (w
)
4536 + WINDOW_LEFT_MARGIN_COLS (w
)
4537 + WINDOW_RIGHT_MARGIN_COLS (w
));
4543 /************************************************************************
4545 ***********************************************************************/
4547 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
4548 N screen-fulls, which is defined as the height of the window minus
4549 next_screen_context_lines. If WHOLE is zero, scroll up N lines
4550 instead. Negative values of N mean scroll down. NOERROR non-zero
4551 means don't signal an error if we try to move over BEGV or ZV,
4555 window_scroll (window
, n
, whole
, noerror
)
4563 /* If we must, use the pixel-based version which is much slower than
4564 the line-based one but can handle varying line heights. */
4565 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
4566 window_scroll_pixel_based (window
, n
, whole
, noerror
);
4568 window_scroll_line_based (window
, n
, whole
, noerror
);
4574 /* Implementation of window_scroll that works based on pixel line
4575 heights. See the comment of window_scroll for parameter
4579 window_scroll_pixel_based (window
, n
, whole
, noerror
)
4586 struct window
*w
= XWINDOW (window
);
4587 struct text_pos start
;
4589 int this_scroll_margin
;
4591 /* True if we fiddled the window vscroll field without really scrolling. */
4594 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4596 /* If PT is not visible in WINDOW, move back one half of
4597 the screen. Allow PT to be partially visible, otherwise
4598 something like (scroll-down 1) with PT in the line before
4599 the partially visible one would recenter. */
4600 tem
= Fpos_visible_in_window_p (make_number (PT
), window
, Qt
);
4603 /* Move backward half the height of the window. Performance note:
4604 vmotion used here is about 10% faster, but would give wrong
4605 results for variable height lines. */
4606 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4607 it
.current_y
= it
.last_visible_y
;
4608 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
4610 /* The function move_iterator_vertically may move over more than
4611 the specified y-distance. If it->w is small, e.g. a
4612 mini-buffer window, we may end up in front of the window's
4613 display area. This is the case when Start displaying at the
4614 start of the line containing PT in this case. */
4615 if (it
.current_y
<= 0)
4617 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4618 move_it_vertically_backward (&it
, 0);
4622 start
= it
.current
.pos
;
4624 else if (auto_window_vscroll_p
)
4626 if (tem
= XCAR (XCDR (XCDR (tem
))), CONSP (tem
))
4629 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4631 dy
= max ((window_box_height (w
)
4632 - next_screen_context_lines
* dy
),
4636 if (n
< 0 && (px
= XINT (XCAR (tem
))) > 0)
4638 px
= max (0, -w
->vscroll
- min (px
, -dy
));
4639 Fset_window_vscroll (window
, make_number (px
), Qt
);
4642 if (n
> 0 && (px
= XINT (XCDR (tem
))) > 0)
4644 px
= max (0, -w
->vscroll
+ min (px
, dy
));
4645 Fset_window_vscroll (window
, make_number (px
), Qt
);
4649 Fset_window_vscroll (window
, make_number (0), Qt
);
4652 /* If scroll_preserve_screen_position is non-nil, we try to set
4653 point in the same window line as it is now, so get that line. */
4654 if (!NILP (Vscroll_preserve_screen_position
))
4656 start_display (&it
, w
, start
);
4657 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4658 preserve_y
= it
.current_y
;
4663 /* Move iterator it from start the specified distance forward or
4664 backward. The result is the new window start. */
4665 start_display (&it
, w
, start
);
4668 int start_pos
= IT_CHARPOS (it
);
4669 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4670 dy
= max ((window_box_height (w
)
4671 - next_screen_context_lines
* dy
),
4674 /* Note that move_it_vertically always moves the iterator to the
4675 start of a line. So, if the last line doesn't have a newline,
4676 we would end up at the start of the line ending at ZV. */
4679 move_it_vertically_backward (&it
, -dy
);
4680 /* Ensure we actually does move, e.g. in case we are currently
4681 looking at an image that is taller that the window height. */
4682 while (start_pos
== IT_CHARPOS (it
)
4683 && start_pos
> BEGV
)
4684 move_it_by_lines (&it
, -1, 1);
4688 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
4689 MOVE_TO_POS
| MOVE_TO_Y
);
4690 /* Ensure we actually does move, e.g. in case we are currently
4691 looking at an image that is taller that the window height. */
4692 while (start_pos
== IT_CHARPOS (it
)
4694 move_it_by_lines (&it
, 1, 1);
4698 move_it_by_lines (&it
, n
, 1);
4700 /* We failed if we find ZV is already on the screen (scrolling up,
4701 means there's nothing past the end), or if we can't start any
4702 earlier (scrolling down, means there's nothing past the top). */
4703 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
4704 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
4706 if (IT_CHARPOS (it
) == ZV
)
4708 if (it
.current_y
< it
.last_visible_y
4709 && (it
.current_y
+ it
.max_ascent
+ it
.max_descent
4710 >= it
.last_visible_y
))
4712 /* The last line was only partially visible, make it fully
4714 w
->vscroll
= (it
.last_visible_y
4715 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4716 adjust_glyphs (it
.f
);
4721 Fsignal (Qend_of_buffer
, Qnil
);
4725 if (w
->vscroll
!= 0)
4726 /* The first line was only partially visible, make it fully
4732 Fsignal (Qbeginning_of_buffer
, Qnil
);
4735 /* If control gets here, then we vscrolled. */
4737 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4739 /* Don't try to change the window start below. */
4745 int pos
= IT_CHARPOS (it
);
4748 /* If in the middle of a multi-glyph character move forward to
4749 the next character. */
4750 if (in_display_vector_p (&it
))
4753 move_it_to (&it
, pos
, -1, -1, -1, MOVE_TO_POS
);
4756 /* Set the window start, and set up the window for redisplay. */
4757 set_marker_restricted (w
->start
, make_number (pos
),
4759 bytepos
= XMARKER (w
->start
)->bytepos
;
4760 w
->start_at_line_beg
= ((pos
== BEGV
|| FETCH_BYTE (bytepos
- 1) == '\n')
4762 w
->update_mode_line
= Qt
;
4763 XSETFASTINT (w
->last_modified
, 0);
4764 XSETFASTINT (w
->last_overlay_modified
, 0);
4765 /* Set force_start so that redisplay_window will run the
4766 window-scroll-functions. */
4767 w
->force_start
= Qt
;
4770 /* The rest of this function uses current_y in a nonstandard way,
4771 not including the height of the header line if any. */
4772 it
.current_y
= it
.vpos
= 0;
4774 /* Move PT out of scroll margins.
4775 This code wants current_y to be zero at the window start position
4776 even if there is a header line. */
4777 this_scroll_margin
= max (0, scroll_margin
);
4778 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->total_lines
) / 4);
4779 this_scroll_margin
*= FRAME_LINE_HEIGHT (it
.f
);
4783 /* We moved the window start towards ZV, so PT may be now
4784 in the scroll margin at the top. */
4785 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4786 if (IT_CHARPOS (it
) == PT
&& it
.current_y
>= this_scroll_margin
)
4787 /* We found PT at a legitimate height. Leave it alone. */
4789 else if (preserve_y
>= 0)
4791 /* If we have a header line, take account of it.
4792 This is necessary because we set it.current_y to 0, above. */
4793 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4794 preserve_y
-= CURRENT_HEADER_LINE_HEIGHT (w
);
4796 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4797 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4801 while (it
.current_y
< this_scroll_margin
)
4803 int prev
= it
.current_y
;
4804 move_it_by_lines (&it
, 1, 1);
4805 if (prev
== it
.current_y
)
4808 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4813 int charpos
, bytepos
;
4816 /* Save our position, for the preserve_y case. */
4817 charpos
= IT_CHARPOS (it
);
4818 bytepos
= IT_BYTEPOS (it
);
4820 /* We moved the window start towards BEGV, so PT may be now
4821 in the scroll margin at the bottom. */
4822 move_it_to (&it
, PT
, -1,
4823 it
.last_visible_y
- this_scroll_margin
- 1, -1,
4824 MOVE_TO_POS
| MOVE_TO_Y
);
4826 /* Save our position, in case it's correct. */
4827 charpos
= IT_CHARPOS (it
);
4828 bytepos
= IT_BYTEPOS (it
);
4830 /* See if point is on a partially visible line at the end. */
4831 if (it
.what
== IT_EOB
)
4832 partial_p
= it
.current_y
+ it
.ascent
+ it
.descent
> it
.last_visible_y
;
4835 move_it_by_lines (&it
, 1, 1);
4836 partial_p
= it
.current_y
> it
.last_visible_y
;
4839 if (charpos
== PT
&& !partial_p
)
4840 /* We found PT before we found the display margin, so PT is ok. */
4842 else if (preserve_y
>= 0)
4844 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4845 start_display (&it
, w
, start
);
4846 #if 0 /* It's wrong to subtract this here
4847 because we called start_display again
4848 and did not alter it.current_y this time. */
4850 /* If we have a header line, take account of it. */
4851 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4852 preserve_y
-= CURRENT_HEADER_LINE_HEIGHT (w
);
4855 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4856 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4861 /* The last line was only partially visible, so back up two
4862 lines to make sure we're on a fully visible line. */
4864 move_it_by_lines (&it
, -2, 0);
4865 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4868 /* No, the position we saved is OK, so use it. */
4869 SET_PT_BOTH (charpos
, bytepos
);
4875 /* Implementation of window_scroll that works based on screen lines.
4876 See the comment of window_scroll for parameter descriptions. */
4879 window_scroll_line_based (window
, n
, whole
, noerror
)
4885 register struct window
*w
= XWINDOW (window
);
4886 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4887 register int pos
, pos_byte
;
4888 register int ht
= window_internal_height (w
);
4889 register Lisp_Object tem
;
4893 struct position posit
;
4896 /* If scrolling screen-fulls, compute the number of lines to
4897 scroll from the window's height. */
4899 n
*= max (1, ht
- next_screen_context_lines
);
4901 startpos
= marker_position (w
->start
);
4903 posit
= *compute_motion (startpos
, 0, 0, 0,
4905 -1, XINT (w
->hscroll
),
4907 original_vpos
= posit
.vpos
;
4909 XSETFASTINT (tem
, PT
);
4910 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4914 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4919 lose
= n
< 0 && PT
== BEGV
;
4920 Fvertical_motion (make_number (n
), window
);
4924 SET_PT_BOTH (opoint
, opoint_byte
);
4931 Fsignal (Qbeginning_of_buffer
, Qnil
);
4936 int this_scroll_margin
= scroll_margin
;
4938 /* Don't use a scroll margin that is negative or too large. */
4939 if (this_scroll_margin
< 0)
4940 this_scroll_margin
= 0;
4942 if (XINT (w
->total_lines
) < 4 * scroll_margin
)
4943 this_scroll_margin
= XINT (w
->total_lines
) / 4;
4945 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4946 w
->start_at_line_beg
= bolp
;
4947 w
->update_mode_line
= Qt
;
4948 XSETFASTINT (w
->last_modified
, 0);
4949 XSETFASTINT (w
->last_overlay_modified
, 0);
4950 /* Set force_start so that redisplay_window will run
4951 the window-scroll-functions. */
4952 w
->force_start
= Qt
;
4954 if (whole
&& !NILP (Vscroll_preserve_screen_position
))
4956 SET_PT_BOTH (pos
, pos_byte
);
4957 Fvertical_motion (make_number (original_vpos
), window
);
4959 /* If we scrolled forward, put point enough lines down
4960 that it is outside the scroll margin. */
4965 if (this_scroll_margin
> 0)
4967 SET_PT_BOTH (pos
, pos_byte
);
4968 Fvertical_motion (make_number (this_scroll_margin
), window
);
4974 if (top_margin
<= opoint
)
4975 SET_PT_BOTH (opoint
, opoint_byte
);
4976 else if (!NILP (Vscroll_preserve_screen_position
))
4978 SET_PT_BOTH (pos
, pos_byte
);
4979 Fvertical_motion (make_number (original_vpos
), window
);
4982 SET_PT (top_margin
);
4988 /* If we scrolled backward, put point near the end of the window
4989 but not within the scroll margin. */
4990 SET_PT_BOTH (pos
, pos_byte
);
4991 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4992 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4995 bottom_margin
= PT
+ 1;
4997 if (bottom_margin
> opoint
)
4998 SET_PT_BOTH (opoint
, opoint_byte
);
5001 if (!NILP (Vscroll_preserve_screen_position
))
5003 SET_PT_BOTH (pos
, pos_byte
);
5004 Fvertical_motion (make_number (original_vpos
), window
);
5007 Fvertical_motion (make_number (-1), window
);
5016 Fsignal (Qend_of_buffer
, Qnil
);
5021 /* Scroll selected_window up or down. If N is nil, scroll a
5022 screen-full which is defined as the height of the window minus
5023 next_screen_context_lines. If N is the symbol `-', scroll.
5024 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
5025 up. This is the guts of Fscroll_up and Fscroll_down. */
5028 scroll_command (n
, direction
)
5032 int count
= SPECPDL_INDEX ();
5034 xassert (abs (direction
) == 1);
5036 /* If selected window's buffer isn't current, make it current for
5037 the moment. But don't screw up if window_scroll gets an error. */
5038 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
5040 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5041 Fset_buffer (XWINDOW (selected_window
)->buffer
);
5043 /* Make redisplay consider other windows than just selected_window. */
5044 ++windows_or_buffers_changed
;
5048 window_scroll (selected_window
, direction
, 1, 0);
5049 else if (EQ (n
, Qminus
))
5050 window_scroll (selected_window
, -direction
, 1, 0);
5053 n
= Fprefix_numeric_value (n
);
5054 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
5057 unbind_to (count
, Qnil
);
5060 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
5061 doc
: /* Scroll text of current window upward ARG lines.
5062 If ARG is omitted or nil, scroll upward by a near full screen.
5063 A near full screen is `next-screen-context-lines' less than a full screen.
5064 Negative ARG means scroll downward.
5065 If ARG is the atom `-', scroll downward by nearly full screen.
5066 When calling from a program, supply as argument a number, nil, or `-'. */)
5070 scroll_command (arg
, 1);
5074 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
5075 doc
: /* Scroll text of current window down ARG lines.
5076 If ARG is omitted or nil, scroll down by a near full screen.
5077 A near full screen is `next-screen-context-lines' less than a full screen.
5078 Negative ARG means scroll upward.
5079 If ARG is the atom `-', scroll upward by nearly full screen.
5080 When calling from a program, supply as argument a number, nil, or `-'. */)
5084 scroll_command (arg
, -1);
5088 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
5089 doc
: /* Return the other window for \"other window scroll\" commands.
5090 If `other-window-scroll-buffer' is non-nil, a window
5091 showing that buffer is used.
5092 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5093 specifies the window. This takes precedence over
5094 `other-window-scroll-buffer'. */)
5099 if (MINI_WINDOW_P (XWINDOW (selected_window
))
5100 && !NILP (Vminibuf_scroll_window
))
5101 window
= Vminibuf_scroll_window
;
5102 /* If buffer is specified, scroll that buffer. */
5103 else if (!NILP (Vother_window_scroll_buffer
))
5105 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
5107 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
5111 /* Nothing specified; look for a neighboring window on the same
5113 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
5115 if (EQ (window
, selected_window
))
5116 /* That didn't get us anywhere; look for a window on another
5119 window
= Fnext_window (window
, Qnil
, Qt
);
5120 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
5121 && ! EQ (window
, selected_window
));
5124 CHECK_LIVE_WINDOW (window
);
5126 if (EQ (window
, selected_window
))
5127 error ("There is no other window");
5132 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
5133 doc
: /* Scroll next window upward ARG lines; or near full screen if no ARG.
5134 A near full screen is `next-screen-context-lines' less than a full screen.
5135 The next window is the one below the current one; or the one at the top
5136 if the current one is at the bottom. Negative ARG means scroll downward.
5137 If ARG is the atom `-', scroll downward by nearly full screen.
5138 When calling from a program, supply as argument a number, nil, or `-'.
5140 If `other-window-scroll-buffer' is non-nil, scroll the window
5141 showing that buffer, popping the buffer up if necessary.
5142 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5143 specifies the window to scroll. This takes precedence over
5144 `other-window-scroll-buffer'. */)
5150 int count
= SPECPDL_INDEX ();
5152 window
= Fother_window_for_scrolling ();
5153 w
= XWINDOW (window
);
5155 /* Don't screw up if window_scroll gets an error. */
5156 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5157 ++windows_or_buffers_changed
;
5159 Fset_buffer (w
->buffer
);
5160 SET_PT (marker_position (w
->pointm
));
5163 window_scroll (window
, 1, 1, 1);
5164 else if (EQ (arg
, Qminus
))
5165 window_scroll (window
, -1, 1, 1);
5171 window_scroll (window
, XINT (arg
), 0, 1);
5174 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
5175 unbind_to (count
, Qnil
);
5180 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 2, "P\np",
5181 doc
: /* Scroll selected window display ARG columns left.
5182 Default for ARG is window width minus 2.
5183 Value is the total amount of leftward horizontal scrolling in
5184 effect after the change.
5185 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5186 lower bound for automatic scrolling, i.e. automatic scrolling
5187 will not scroll a window to a column less than the value returned
5188 by this function. This happens in an interactive call. */)
5190 register Lisp_Object arg
, set_minimum
;
5194 struct window
*w
= XWINDOW (selected_window
);
5197 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5199 arg
= Fprefix_numeric_value (arg
);
5201 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
5202 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5204 if (!NILP (set_minimum
))
5205 w
->min_hscroll
= w
->hscroll
;
5210 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 2, "P\np",
5211 doc
: /* Scroll selected window display ARG columns right.
5212 Default for ARG is window width minus 2.
5213 Value is the total amount of leftward horizontal scrolling in
5214 effect after the change.
5215 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5216 lower bound for automatic scrolling, i.e. automatic scrolling
5217 will not scroll a window to a column less than the value returned
5218 by this function. This happens in an interactive call. */)
5220 register Lisp_Object arg
, set_minimum
;
5224 struct window
*w
= XWINDOW (selected_window
);
5227 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5229 arg
= Fprefix_numeric_value (arg
);
5231 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
5232 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5234 if (!NILP (set_minimum
))
5235 w
->min_hscroll
= w
->hscroll
;
5240 DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window
, Sminibuffer_selected_window
, 0, 0, 0,
5241 doc
: /* Return the window which was selected when entering the minibuffer.
5242 Returns nil, if current window is not a minibuffer window. */)
5245 if (minibuf_level
> 0
5246 && MINI_WINDOW_P (XWINDOW (selected_window
))
5247 && WINDOW_LIVE_P (minibuf_selected_window
))
5248 return minibuf_selected_window
;
5253 /* Value is the number of lines actually displayed in window W,
5254 as opposed to its height. */
5257 displayed_window_lines (w
)
5261 struct text_pos start
;
5262 int height
= window_box_height (w
);
5263 struct buffer
*old_buffer
;
5266 if (XBUFFER (w
->buffer
) != current_buffer
)
5268 old_buffer
= current_buffer
;
5269 set_buffer_internal (XBUFFER (w
->buffer
));
5274 /* In case W->start is out of the accessible range, do something
5275 reasonable. This happens in Info mode when Info-scroll-down
5276 calls (recenter -1) while W->start is 1. */
5277 if (XMARKER (w
->start
)->charpos
< BEGV
)
5278 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
5279 else if (XMARKER (w
->start
)->charpos
> ZV
)
5280 SET_TEXT_POS (start
, ZV
, ZV_BYTE
);
5282 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5284 start_display (&it
, w
, start
);
5285 move_it_vertically (&it
, height
);
5286 bottom_y
= line_bottom_y (&it
);
5288 /* rms: On a non-window display,
5289 the value of it.vpos at the bottom of the screen
5290 seems to be 1 larger than window_box_height (w).
5291 This kludge fixes a bug whereby (move-to-window-line -1)
5292 when ZV is on the last screen line
5293 moves to the previous screen line instead of the last one. */
5294 if (! FRAME_WINDOW_P (XFRAME (w
->frame
)))
5297 /* Add in empty lines at the bottom of the window. */
5298 if (bottom_y
< height
)
5300 int uy
= FRAME_LINE_HEIGHT (it
.f
);
5301 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
5305 set_buffer_internal (old_buffer
);
5311 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
5312 doc
: /* Center point in window and redisplay frame.
5313 With prefix argument ARG, recenter putting point on screen line ARG
5314 relative to the current window. If ARG is negative, it counts up from the
5315 bottom of the window. (ARG should be less than the height of the window.)
5317 If ARG is omitted or nil, erase the entire frame and then
5318 redraw with point in the center of the current window.
5319 Just C-u as prefix means put point in the center of the window
5320 and redisplay normally--don't erase and redraw the frame. */)
5322 register Lisp_Object arg
;
5324 struct window
*w
= XWINDOW (selected_window
);
5325 struct buffer
*buf
= XBUFFER (w
->buffer
);
5326 struct buffer
*obuf
= current_buffer
;
5328 int charpos
, bytepos
;
5330 /* If redisplay is suppressed due to an error, try again. */
5331 obuf
->display_error_modiff
= 0;
5337 /* Invalidate pixel data calculated for all compositions. */
5338 for (i
= 0; i
< n_compositions
; i
++)
5339 composition_table
[i
]->font
= NULL
;
5341 Fredraw_frame (w
->frame
);
5342 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
5345 else if (CONSP (arg
)) /* Just C-u. */
5349 arg
= Fprefix_numeric_value (arg
);
5353 set_buffer_internal (buf
);
5355 /* Handle centering on a graphical frame specially. Such frames can
5356 have variable-height lines and centering point on the basis of
5357 line counts would lead to strange effects. */
5358 if (FRAME_WINDOW_P (XFRAME (w
->frame
)))
5365 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5366 start_display (&it
, w
, pt
);
5367 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
5368 charpos
= IT_CHARPOS (it
);
5369 bytepos
= IT_BYTEPOS (it
);
5371 else if (XINT (arg
) < 0)
5375 int nlines
= - XINT (arg
);
5376 int extra_line_spacing
;
5377 int h
= window_box_height (w
);
5379 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5380 start_display (&it
, w
, pt
);
5382 /* Be sure we have the exact height of the full line containing PT. */
5383 move_it_by_lines (&it
, 0, 1);
5385 /* The amount of pixels we have to move back is the window
5386 height minus what's displayed in the line containing PT,
5387 and the lines below. */
5390 move_it_by_lines (&it
, nlines
, 1);
5392 if (it
.vpos
== nlines
)
5396 /* Last line has no newline */
5397 h
-= line_bottom_y (&it
);
5401 /* Don't reserve space for extra line spacing of last line. */
5402 extra_line_spacing
= it
.max_extra_line_spacing
;
5404 /* If we can't move down NLINES lines because we hit
5405 the end of the buffer, count in some empty lines. */
5406 if (it
.vpos
< nlines
)
5409 extra_line_spacing
= it
.extra_line_spacing
;
5410 h
-= nlines
* (FRAME_LINE_HEIGHT (it
.f
) + extra_line_spacing
);
5415 /* Now find the new top line (starting position) of the window. */
5416 start_display (&it
, w
, pt
);
5418 move_it_vertically_backward (&it
, h
);
5420 /* If extra line spacing is present, we may move too far
5421 back. This causes the last line to be only partially
5422 visible (which triggers redisplay to recenter that line
5423 in the middle), so move forward.
5424 But ignore extra line spacing on last line, as it is not
5425 considered to be part of the visible height of the line.
5427 h
+= extra_line_spacing
;
5428 while (-it
.current_y
> h
)
5429 move_it_by_lines (&it
, 1, 1);
5431 charpos
= IT_CHARPOS (it
);
5432 bytepos
= IT_BYTEPOS (it
);
5436 struct position pos
;
5437 pos
= *vmotion (PT
, - XINT (arg
), w
);
5438 charpos
= pos
.bufpos
;
5439 bytepos
= pos
.bytepos
;
5444 struct position pos
;
5445 int ht
= window_internal_height (w
);
5448 arg
= make_number (ht
/ 2);
5449 else if (XINT (arg
) < 0)
5450 arg
= make_number (XINT (arg
) + ht
);
5452 pos
= *vmotion (PT
, - XINT (arg
), w
);
5453 charpos
= pos
.bufpos
;
5454 bytepos
= pos
.bytepos
;
5457 /* Set the new window start. */
5458 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
5459 w
->window_end_valid
= Qnil
;
5461 w
->optional_new_start
= Qt
;
5463 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
5464 w
->start_at_line_beg
= Qt
;
5466 w
->start_at_line_beg
= Qnil
;
5468 set_buffer_internal (obuf
);
5473 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
5475 doc
: /* Return the height in lines of the text display area of WINDOW.
5476 This doesn't include the mode-line (or header-line if any) or any
5477 partial-height lines in the text display area. */)
5481 struct window
*w
= decode_window (window
);
5482 int pixel_height
= window_box_height (w
);
5483 int line_height
= pixel_height
/ FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
5484 return make_number (line_height
);
5489 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
5491 doc
: /* Position point relative to window.
5492 With no argument, position point at center of window.
5493 An argument specifies vertical position within the window;
5494 zero means top of window, negative means relative to bottom of window. */)
5498 struct window
*w
= XWINDOW (selected_window
);
5502 window
= selected_window
;
5503 start
= marker_position (w
->start
);
5504 if (start
< BEGV
|| start
> ZV
)
5506 int height
= window_internal_height (w
);
5507 Fvertical_motion (make_number (- (height
/ 2)), window
);
5508 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
5509 w
->start_at_line_beg
= Fbolp ();
5510 w
->force_start
= Qt
;
5513 Fgoto_char (w
->start
);
5515 lines
= displayed_window_lines (w
);
5517 XSETFASTINT (arg
, lines
/ 2);
5520 arg
= Fprefix_numeric_value (arg
);
5522 XSETINT (arg
, XINT (arg
) + lines
);
5525 /* Skip past a partially visible first line. */
5527 XSETINT (arg
, XINT (arg
) + 1);
5529 return Fvertical_motion (arg
, window
);
5534 /***********************************************************************
5535 Window Configuration
5536 ***********************************************************************/
5538 struct save_window_data
5540 EMACS_INT size_from_Lisp_Vector_struct
;
5541 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
5542 Lisp_Object frame_cols
, frame_lines
, frame_menu_bar_lines
;
5543 Lisp_Object frame_tool_bar_lines
;
5544 Lisp_Object selected_frame
;
5545 Lisp_Object current_window
;
5546 Lisp_Object current_buffer
;
5547 Lisp_Object minibuf_scroll_window
;
5548 Lisp_Object minibuf_selected_window
;
5549 Lisp_Object root_window
;
5550 Lisp_Object focus_frame
;
5551 /* Record the values of window-min-width and window-min-height
5552 so that window sizes remain consistent with them. */
5553 Lisp_Object min_width
, min_height
;
5554 /* A vector, each of whose elements is a struct saved_window
5556 Lisp_Object saved_windows
;
5559 /* This is saved as a Lisp_Vector */
5562 /* these first two must agree with struct Lisp_Vector in lisp.h */
5563 EMACS_INT size_from_Lisp_Vector_struct
;
5564 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
5567 Lisp_Object buffer
, start
, pointm
, mark
;
5568 Lisp_Object left_col
, top_line
, total_cols
, total_lines
;
5569 Lisp_Object hscroll
, min_hscroll
;
5570 Lisp_Object parent
, prev
;
5571 Lisp_Object start_at_line_beg
;
5572 Lisp_Object display_table
;
5573 Lisp_Object orig_top_line
, orig_total_lines
;
5574 Lisp_Object left_margin_cols
, right_margin_cols
;
5575 Lisp_Object left_fringe_width
, right_fringe_width
, fringes_outside_margins
;
5576 Lisp_Object scroll_bar_width
, vertical_scroll_bar_type
;
5579 #define SAVED_WINDOW_VECTOR_SIZE 24 /* Arg to Fmake_vector */
5581 #define SAVED_WINDOW_N(swv,n) \
5582 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
5584 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
5585 doc
: /* Return t if OBJECT is a window-configuration object. */)
5589 if (WINDOW_CONFIGURATIONP (object
))
5594 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
5595 doc
: /* Return the frame that CONFIG, a window-configuration object, is about. */)
5599 register struct save_window_data
*data
;
5600 struct Lisp_Vector
*saved_windows
;
5602 if (! WINDOW_CONFIGURATIONP (config
))
5603 wrong_type_argument (Qwindow_configuration_p
, config
);
5605 data
= (struct save_window_data
*) XVECTOR (config
);
5606 saved_windows
= XVECTOR (data
->saved_windows
);
5607 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5610 DEFUN ("set-window-configuration", Fset_window_configuration
,
5611 Sset_window_configuration
, 1, 1, 0,
5612 doc
: /* Set the configuration of windows and buffers as specified by CONFIGURATION.
5613 CONFIGURATION must be a value previously returned
5614 by `current-window-configuration' (which see).
5615 If CONFIGURATION was made from a frame that is now deleted,
5616 only frame-independent values can be restored. In this case,
5617 the return value is nil. Otherwise the value is t. */)
5619 Lisp_Object configuration
;
5621 register struct save_window_data
*data
;
5622 struct Lisp_Vector
*saved_windows
;
5623 Lisp_Object new_current_buffer
;
5628 while (!WINDOW_CONFIGURATIONP (configuration
))
5629 wrong_type_argument (Qwindow_configuration_p
, configuration
);
5631 data
= (struct save_window_data
*) XVECTOR (configuration
);
5632 saved_windows
= XVECTOR (data
->saved_windows
);
5634 new_current_buffer
= data
->current_buffer
;
5635 if (NILP (XBUFFER (new_current_buffer
)->name
))
5636 new_current_buffer
= Qnil
;
5639 if (XBUFFER (new_current_buffer
) == current_buffer
)
5642 /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of
5643 point in new_current_buffer as of the last time this buffer was
5644 used. This can be non-deterministic since it can be changed by
5645 things like jit-lock by mere temporary selection of some random
5646 window that happens to show this buffer.
5647 So if possible we want this arbitrary choice of "which point" to
5648 be the one from the to-be-selected-window so as to prevent this
5649 window's cursor from being copied from another window. */
5650 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
5651 /* If current_window = selected_window, its point is in BUF_PT. */
5652 && !EQ (selected_window
, data
->current_window
))
5653 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
5655 old_point
= BUF_PT (XBUFFER (new_current_buffer
));
5658 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5661 /* If f is a dead frame, don't bother rebuilding its window tree.
5662 However, there is other stuff we should still try to do below. */
5663 if (FRAME_LIVE_P (f
))
5665 register struct window
*w
;
5666 register struct saved_window
*p
;
5667 struct window
*root_window
;
5668 struct window
**leaf_windows
;
5672 /* If the frame has been resized since this window configuration was
5673 made, we change the frame to the size specified in the
5674 configuration, restore the configuration, and then resize it
5675 back. We keep track of the prevailing height in these variables. */
5676 int previous_frame_lines
= FRAME_LINES (f
);
5677 int previous_frame_cols
= FRAME_COLS (f
);
5678 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
5679 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
5681 /* The mouse highlighting code could get screwed up
5682 if it runs during this. */
5685 if (XFASTINT (data
->frame_lines
) != previous_frame_lines
5686 || XFASTINT (data
->frame_cols
) != previous_frame_cols
)
5687 change_frame_size (f
, XFASTINT (data
->frame_lines
),
5688 XFASTINT (data
->frame_cols
), 0, 0, 0);
5689 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5690 if (XFASTINT (data
->frame_menu_bar_lines
)
5691 != previous_frame_menu_bar_lines
)
5692 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
5693 #ifdef HAVE_WINDOW_SYSTEM
5694 if (XFASTINT (data
->frame_tool_bar_lines
)
5695 != previous_frame_tool_bar_lines
)
5696 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
5700 /* "Swap out" point from the selected window's buffer
5701 into the window itself. (Normally the pointm of the selected
5702 window holds garbage.) We do this now, before
5703 restoring the window contents, and prevent it from
5704 being done later on when we select a new window. */
5705 if (! NILP (XWINDOW (selected_window
)->buffer
))
5707 w
= XWINDOW (selected_window
);
5708 set_marker_both (w
->pointm
,
5710 BUF_PT (XBUFFER (w
->buffer
)),
5711 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5714 windows_or_buffers_changed
++;
5715 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
5717 /* Problem: Freeing all matrices and later allocating them again
5718 is a serious redisplay flickering problem. What we would
5719 really like to do is to free only those matrices not reused
5721 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
5723 = (struct window
**) alloca (count_windows (root_window
)
5724 * sizeof (struct window
*));
5725 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
5727 /* Temporarily avoid any problems with windows that are smaller
5728 than they are supposed to be. */
5729 window_min_height
= 1;
5730 window_min_width
= 1;
5733 Mark all windows now on frame as "deleted".
5734 Restoring the new configuration "undeletes" any that are in it.
5736 Save their current buffers in their height fields, since we may
5737 need it later, if a buffer saved in the configuration is now
5739 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5741 for (k
= 0; k
< saved_windows
->size
; k
++)
5743 p
= SAVED_WINDOW_N (saved_windows
, k
);
5744 w
= XWINDOW (p
->window
);
5747 if (!NILP (p
->parent
))
5748 w
->parent
= SAVED_WINDOW_N (saved_windows
,
5749 XFASTINT (p
->parent
))->window
;
5753 if (!NILP (p
->prev
))
5755 w
->prev
= SAVED_WINDOW_N (saved_windows
,
5756 XFASTINT (p
->prev
))->window
;
5757 XWINDOW (w
->prev
)->next
= p
->window
;
5762 if (!NILP (w
->parent
))
5764 if (EQ (p
->total_cols
, XWINDOW (w
->parent
)->total_cols
))
5766 XWINDOW (w
->parent
)->vchild
= p
->window
;
5767 XWINDOW (w
->parent
)->hchild
= Qnil
;
5771 XWINDOW (w
->parent
)->hchild
= p
->window
;
5772 XWINDOW (w
->parent
)->vchild
= Qnil
;
5777 /* If we squirreled away the buffer in the window's height,
5779 if (BUFFERP (w
->total_lines
))
5780 w
->buffer
= w
->total_lines
;
5781 w
->left_col
= p
->left_col
;
5782 w
->top_line
= p
->top_line
;
5783 w
->total_cols
= p
->total_cols
;
5784 w
->total_lines
= p
->total_lines
;
5785 w
->hscroll
= p
->hscroll
;
5786 w
->min_hscroll
= p
->min_hscroll
;
5787 w
->display_table
= p
->display_table
;
5788 w
->orig_top_line
= p
->orig_top_line
;
5789 w
->orig_total_lines
= p
->orig_total_lines
;
5790 w
->left_margin_cols
= p
->left_margin_cols
;
5791 w
->right_margin_cols
= p
->right_margin_cols
;
5792 w
->left_fringe_width
= p
->left_fringe_width
;
5793 w
->right_fringe_width
= p
->right_fringe_width
;
5794 w
->fringes_outside_margins
= p
->fringes_outside_margins
;
5795 w
->scroll_bar_width
= p
->scroll_bar_width
;
5796 w
->vertical_scroll_bar_type
= p
->vertical_scroll_bar_type
;
5797 XSETFASTINT (w
->last_modified
, 0);
5798 XSETFASTINT (w
->last_overlay_modified
, 0);
5800 /* Reinstall the saved buffer and pointers into it. */
5801 if (NILP (p
->buffer
))
5802 w
->buffer
= p
->buffer
;
5805 if (!NILP (XBUFFER (p
->buffer
)->name
))
5806 /* If saved buffer is alive, install it. */
5808 w
->buffer
= p
->buffer
;
5809 w
->start_at_line_beg
= p
->start_at_line_beg
;
5810 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
5811 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
5812 Fset_marker (XBUFFER (w
->buffer
)->mark
,
5813 p
->mark
, w
->buffer
);
5815 /* As documented in Fcurrent_window_configuration, don't
5816 restore the location of point in the buffer which was
5817 current when the window configuration was recorded. */
5818 if (!EQ (p
->buffer
, new_current_buffer
)
5819 && XBUFFER (p
->buffer
) == current_buffer
)
5820 Fgoto_char (w
->pointm
);
5822 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
5823 /* Else unless window has a live buffer, get one. */
5825 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
5826 /* This will set the markers to beginning of visible
5828 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
5829 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
5830 w
->start_at_line_beg
= Qt
;
5833 /* Keeping window's old buffer; make sure the markers
5836 /* Set window markers at start of visible range. */
5837 if (XMARKER (w
->start
)->buffer
== 0)
5838 set_marker_restricted (w
->start
, make_number (0),
5840 if (XMARKER (w
->pointm
)->buffer
== 0)
5841 set_marker_restricted_both (w
->pointm
, w
->buffer
,
5842 BUF_PT (XBUFFER (w
->buffer
)),
5843 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5844 w
->start_at_line_beg
= Qt
;
5849 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
5850 /* Prevent "swapping out point" in the old selected window
5851 using the buffer that has been restored into it.
5852 We already swapped out point that from that window's old buffer. */
5853 selected_window
= Qnil
;
5855 /* Arrange *not* to restore point in the buffer that was
5856 current when the window configuration was saved. */
5857 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
))
5858 set_marker_restricted (XWINDOW (data
->current_window
)->pointm
,
5859 make_number (old_point
),
5860 XWINDOW (data
->current_window
)->buffer
);
5862 Fselect_window (data
->current_window
, Qnil
);
5863 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
5866 if (NILP (data
->focus_frame
)
5867 || (FRAMEP (data
->focus_frame
)
5868 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
5869 Fredirect_frame_focus (frame
, data
->focus_frame
);
5871 #if 0 /* I don't understand why this is needed, and it causes problems
5872 when the frame's old selected window has been deleted. */
5873 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
5874 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
5878 /* Set the screen height to the value it had before this function. */
5879 if (previous_frame_lines
!= FRAME_LINES (f
)
5880 || previous_frame_cols
!= FRAME_COLS (f
))
5881 change_frame_size (f
, previous_frame_lines
, previous_frame_cols
,
5883 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5884 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
5885 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
5887 #ifdef HAVE_WINDOW_SYSTEM
5888 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
5889 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
5894 /* Now, free glyph matrices in windows that were not reused. */
5895 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
5897 if (NILP (leaf_windows
[i
]->buffer
))
5899 /* Assert it's not reused as a combination. */
5900 xassert (NILP (leaf_windows
[i
]->hchild
)
5901 && NILP (leaf_windows
[i
]->vchild
));
5902 free_window_matrices (leaf_windows
[i
]);
5904 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
5912 /* Fselect_window will have made f the selected frame, so we
5913 reselect the proper frame here. Fhandle_switch_frame will change the
5914 selected window too, but that doesn't make the call to
5915 Fselect_window above totally superfluous; it still sets f's
5917 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
5918 do_switch_frame (data
->selected_frame
, 0, 0);
5920 if (! NILP (Vwindow_configuration_change_hook
)
5921 && ! NILP (Vrun_hooks
))
5922 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
5925 if (!NILP (new_current_buffer
))
5926 Fset_buffer (new_current_buffer
);
5928 /* Restore the minimum heights recorded in the configuration. */
5929 window_min_height
= XINT (data
->min_height
);
5930 window_min_width
= XINT (data
->min_width
);
5932 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
5933 minibuf_selected_window
= data
->minibuf_selected_window
;
5935 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
5938 /* Mark all windows now on frame as deleted
5939 by setting their buffers to nil. */
5942 delete_all_subwindows (w
)
5943 register struct window
*w
;
5945 if (!NILP (w
->next
))
5946 delete_all_subwindows (XWINDOW (w
->next
));
5947 if (!NILP (w
->vchild
))
5948 delete_all_subwindows (XWINDOW (w
->vchild
));
5949 if (!NILP (w
->hchild
))
5950 delete_all_subwindows (XWINDOW (w
->hchild
));
5952 w
->total_lines
= w
->buffer
; /* See Fset_window_configuration for excuse. */
5954 if (!NILP (w
->buffer
))
5957 /* We set all three of these fields to nil, to make sure that we can
5958 distinguish this dead window from any live window. Live leaf
5959 windows will have buffer set, and combination windows will have
5960 vchild or hchild set. */
5965 Vwindow_list
= Qnil
;
5969 count_windows (window
)
5970 register struct window
*window
;
5972 register int count
= 1;
5973 if (!NILP (window
->next
))
5974 count
+= count_windows (XWINDOW (window
->next
));
5975 if (!NILP (window
->vchild
))
5976 count
+= count_windows (XWINDOW (window
->vchild
));
5977 if (!NILP (window
->hchild
))
5978 count
+= count_windows (XWINDOW (window
->hchild
));
5983 /* Fill vector FLAT with leaf windows under W, starting at index I.
5984 Value is last index + 1. */
5987 get_leaf_windows (w
, flat
, i
)
5989 struct window
**flat
;
5994 if (!NILP (w
->hchild
))
5995 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
5996 else if (!NILP (w
->vchild
))
5997 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
6001 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6008 /* Return a pointer to the glyph W's physical cursor is on. Value is
6009 null if W's current matrix is invalid, so that no meaningfull glyph
6013 get_phys_cursor_glyph (w
)
6016 struct glyph_row
*row
;
6017 struct glyph
*glyph
;
6019 if (w
->phys_cursor
.vpos
>= 0
6020 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
6021 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
6023 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
6024 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
6033 save_window_save (window
, vector
, i
)
6035 struct Lisp_Vector
*vector
;
6038 register struct saved_window
*p
;
6039 register struct window
*w
;
6040 register Lisp_Object tem
;
6042 for (;!NILP (window
); window
= w
->next
)
6044 p
= SAVED_WINDOW_N (vector
, i
);
6045 w
= XWINDOW (window
);
6047 XSETFASTINT (w
->temslot
, i
); i
++;
6049 p
->buffer
= w
->buffer
;
6050 p
->left_col
= w
->left_col
;
6051 p
->top_line
= w
->top_line
;
6052 p
->total_cols
= w
->total_cols
;
6053 p
->total_lines
= w
->total_lines
;
6054 p
->hscroll
= w
->hscroll
;
6055 p
->min_hscroll
= w
->min_hscroll
;
6056 p
->display_table
= w
->display_table
;
6057 p
->orig_top_line
= w
->orig_top_line
;
6058 p
->orig_total_lines
= w
->orig_total_lines
;
6059 p
->left_margin_cols
= w
->left_margin_cols
;
6060 p
->right_margin_cols
= w
->right_margin_cols
;
6061 p
->left_fringe_width
= w
->left_fringe_width
;
6062 p
->right_fringe_width
= w
->right_fringe_width
;
6063 p
->fringes_outside_margins
= w
->fringes_outside_margins
;
6064 p
->scroll_bar_width
= w
->scroll_bar_width
;
6065 p
->vertical_scroll_bar_type
= w
->vertical_scroll_bar_type
;
6066 if (!NILP (w
->buffer
))
6068 /* Save w's value of point in the window configuration.
6069 If w is the selected window, then get the value of point
6070 from the buffer; pointm is garbage in the selected window. */
6071 if (EQ (window
, selected_window
))
6073 p
->pointm
= Fmake_marker ();
6074 set_marker_both (p
->pointm
, w
->buffer
,
6075 BUF_PT (XBUFFER (w
->buffer
)),
6076 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6079 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
6081 p
->start
= Fcopy_marker (w
->start
, Qnil
);
6082 p
->start_at_line_beg
= w
->start_at_line_beg
;
6084 tem
= XBUFFER (w
->buffer
)->mark
;
6085 p
->mark
= Fcopy_marker (tem
, Qnil
);
6092 p
->start_at_line_beg
= Qnil
;
6095 if (NILP (w
->parent
))
6098 p
->parent
= XWINDOW (w
->parent
)->temslot
;
6103 p
->prev
= XWINDOW (w
->prev
)->temslot
;
6105 if (!NILP (w
->vchild
))
6106 i
= save_window_save (w
->vchild
, vector
, i
);
6107 if (!NILP (w
->hchild
))
6108 i
= save_window_save (w
->hchild
, vector
, i
);
6114 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
6115 Scurrent_window_configuration
, 0, 1, 0,
6116 doc
: /* Return an object representing the current window configuration of FRAME.
6117 If FRAME is nil or omitted, use the selected frame.
6118 This describes the number of windows, their sizes and current buffers,
6119 and for each displayed buffer, where display starts, and the positions of
6120 point and mark. An exception is made for point in the current buffer:
6121 its value is -not- saved.
6122 This also records the currently selected frame, and FRAME's focus
6123 redirection (see `redirect-frame-focus'). */)
6127 register Lisp_Object tem
;
6128 register int n_windows
;
6129 register struct save_window_data
*data
;
6130 register struct Lisp_Vector
*vec
;
6135 frame
= selected_frame
;
6136 CHECK_LIVE_FRAME (frame
);
6139 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6140 vec
= allocate_other_vector (VECSIZE (struct save_window_data
));
6141 data
= (struct save_window_data
*)vec
;
6143 XSETFASTINT (data
->frame_cols
, FRAME_COLS (f
));
6144 XSETFASTINT (data
->frame_lines
, FRAME_LINES (f
));
6145 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
6146 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
6147 data
->selected_frame
= selected_frame
;
6148 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
6149 XSETBUFFER (data
->current_buffer
, current_buffer
);
6150 data
->minibuf_scroll_window
= minibuf_level
> 0 ? Vminibuf_scroll_window
: Qnil
;
6151 data
->minibuf_selected_window
= minibuf_level
> 0 ? minibuf_selected_window
: Qnil
;
6152 data
->root_window
= FRAME_ROOT_WINDOW (f
);
6153 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
6154 XSETINT (data
->min_height
, window_min_height
);
6155 XSETINT (data
->min_width
, window_min_width
);
6156 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
6157 data
->saved_windows
= tem
;
6158 for (i
= 0; i
< n_windows
; i
++)
6159 XVECTOR (tem
)->contents
[i
]
6160 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
6161 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
6162 XSETWINDOW_CONFIGURATION (tem
, data
);
6166 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
6168 doc
: /* Execute BODY, preserving window sizes and contents.
6169 Return the value of the last form in BODY.
6170 Restore which buffer appears in which window, where display starts,
6171 and the value of point and mark for each window.
6172 Also restore the choice of selected window.
6173 Also restore which buffer is current.
6174 Does not restore the value of point in current buffer.
6175 usage: (save-window-excursion BODY ...) */)
6179 register Lisp_Object val
;
6180 register int count
= SPECPDL_INDEX ();
6182 record_unwind_protect (Fset_window_configuration
,
6183 Fcurrent_window_configuration (Qnil
));
6184 val
= Fprogn (args
);
6185 return unbind_to (count
, val
);
6189 /***********************************************************************
6191 ***********************************************************************/
6193 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
6195 doc
: /* Set width of marginal areas of window WINDOW.
6196 If WINDOW is nil, set margins of the currently selected window.
6197 Second arg LEFT-WIDTH specifies the number of character cells to
6198 reserve for the left marginal area. Optional third arg RIGHT-WIDTH
6199 does the same for the right marginal area. A nil width parameter
6200 means no margin. */)
6201 (window
, left
, right
)
6202 Lisp_Object window
, left
, right
;
6204 struct window
*w
= decode_window (window
);
6206 /* Translate negative or zero widths to nil.
6207 Margins that are too wide have to be checked elsewhere. */
6211 CHECK_NUMBER (left
);
6212 if (XINT (left
) <= 0)
6218 CHECK_NUMBER (right
);
6219 if (XINT (right
) <= 0)
6223 if (!EQ (w
->left_margin_cols
, left
)
6224 || !EQ (w
->right_margin_cols
, right
))
6226 w
->left_margin_cols
= left
;
6227 w
->right_margin_cols
= right
;
6229 adjust_window_margins (w
);
6231 ++windows_or_buffers_changed
;
6232 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6239 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
6241 doc
: /* Get width of marginal areas of window WINDOW.
6242 If WINDOW is omitted or nil, use the currently selected window.
6243 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).
6244 If a marginal area does not exist, its width will be returned
6249 struct window
*w
= decode_window (window
);
6250 return Fcons (w
->left_margin_cols
, w
->right_margin_cols
);
6255 /***********************************************************************
6257 ***********************************************************************/
6259 DEFUN ("set-window-fringes", Fset_window_fringes
, Sset_window_fringes
,
6261 doc
: /* Set the fringe widths of window WINDOW.
6262 If WINDOW is nil, set the fringe widths of the currently selected
6264 Second arg LEFT-WIDTH specifies the number of pixels to reserve for
6265 the left fringe. Optional third arg RIGHT-WIDTH specifies the right
6266 fringe width. If a fringe width arg is nil, that means to use the
6267 frame's default fringe width. Default fringe widths can be set with
6268 the command `set-fringe-style'.
6269 If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes
6270 outside of the display margins. By default, fringes are drawn between
6271 display marginal areas and the text area. */)
6272 (window
, left
, right
, outside_margins
)
6273 Lisp_Object window
, left
, right
, outside_margins
;
6275 struct window
*w
= decode_window (window
);
6278 CHECK_NATNUM (left
);
6280 CHECK_NATNUM (right
);
6282 if (!EQ (w
->left_fringe_width
, left
)
6283 || !EQ (w
->right_fringe_width
, right
)
6284 || !EQ (w
->fringes_outside_margins
, outside_margins
))
6286 w
->left_fringe_width
= left
;
6287 w
->right_fringe_width
= right
;
6288 w
->fringes_outside_margins
= outside_margins
;
6290 adjust_window_margins (w
);
6292 clear_glyph_matrix (w
->current_matrix
);
6293 w
->window_end_valid
= Qnil
;
6295 ++windows_or_buffers_changed
;
6296 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6303 DEFUN ("window-fringes", Fwindow_fringes
, Swindow_fringes
,
6305 doc
: /* Get width of fringes of window WINDOW.
6306 If WINDOW is omitted or nil, use the currently selected window.
6307 Value is a list of the form (LEFT-WIDTH RIGHT-WIDTH OUTSIDE-MARGINS). */)
6311 struct window
*w
= decode_window (window
);
6312 return Fcons (make_number (WINDOW_LEFT_FRINGE_WIDTH (w
)),
6313 Fcons (make_number (WINDOW_RIGHT_FRINGE_WIDTH (w
)),
6314 Fcons ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
) ?
6315 Qt
: Qnil
), Qnil
)));
6320 /***********************************************************************
6322 ***********************************************************************/
6324 DEFUN ("set-window-scroll-bars", Fset_window_scroll_bars
, Sset_window_scroll_bars
,
6326 doc
: /* Set width and type of scroll bars of window WINDOW.
6327 If window is nil, set scroll bars of the currently selected window.
6328 Second parameter WIDTH specifies the pixel width for the scroll bar;
6329 this is automatically adjusted to a multiple of the frame column width.
6330 Third parameter VERTICAL-TYPE specifies the type of the vertical scroll
6331 bar: left, right, or nil.
6332 If WIDTH is nil, use the frame's scroll-bar width.
6333 If TYPE is t, use the frame's scroll-bar type. */)
6334 (window
, width
, vertical_type
, horizontal_type
)
6335 Lisp_Object window
, width
, vertical_type
, horizontal_type
;
6337 struct window
*w
= decode_window (window
);
6341 CHECK_NATNUM (width
);
6343 if (XINT (width
) == 0)
6344 vertical_type
= Qnil
;
6347 if (!(EQ (vertical_type
, Qnil
)
6348 || EQ (vertical_type
, Qleft
)
6349 || EQ (vertical_type
, Qright
)
6350 || EQ (vertical_type
, Qt
)))
6351 error ("Invalid type of vertical scroll bar");
6353 if (!EQ (w
->scroll_bar_width
, width
)
6354 || !EQ (w
->vertical_scroll_bar_type
, vertical_type
))
6356 w
->scroll_bar_width
= width
;
6357 w
->vertical_scroll_bar_type
= vertical_type
;
6359 adjust_window_margins (w
);
6361 clear_glyph_matrix (w
->current_matrix
);
6362 w
->window_end_valid
= Qnil
;
6364 ++windows_or_buffers_changed
;
6365 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6372 DEFUN ("window-scroll-bars", Fwindow_scroll_bars
, Swindow_scroll_bars
,
6374 doc
: /* Get width and type of scroll bars of window WINDOW.
6375 If WINDOW is omitted or nil, use the currently selected window.
6376 Value is a list of the form (WIDTH COLS VERTICAL-TYPE HORIZONTAL-TYPE).
6377 If WIDTH is nil or TYPE is t, the window is using the frame's corresponding
6382 struct window
*w
= decode_window (window
);
6383 return Fcons (make_number ((WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6384 ? WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6385 : WINDOW_SCROLL_BAR_AREA_WIDTH (w
))),
6386 Fcons (make_number (WINDOW_SCROLL_BAR_COLS (w
)),
6387 Fcons (w
->vertical_scroll_bar_type
,
6388 Fcons (Qnil
, Qnil
))));
6393 /***********************************************************************
6395 ***********************************************************************/
6397 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 2, 0,
6398 doc
: /* Return the amount by which WINDOW is scrolled vertically.
6399 Use the selected window if WINDOW is nil or omitted.
6400 Normally, value is a multiple of the canonical character height of WINDOW;
6401 optional second arg PIXELS_P means value is measured in pixels. */)
6403 Lisp_Object window
, pixels_p
;
6410 window
= selected_window
;
6412 CHECK_WINDOW (window
);
6413 w
= XWINDOW (window
);
6414 f
= XFRAME (w
->frame
);
6416 if (FRAME_WINDOW_P (f
))
6417 result
= (NILP (pixels_p
)
6418 ? FRAME_CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
)
6419 : make_number (-w
->vscroll
));
6421 result
= make_number (0);
6426 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
6428 doc
: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL.
6429 WINDOW nil means use the selected window. Normally, VSCROLL is a
6430 non-negative multiple of the canonical character height of WINDOW;
6431 optional third arg PIXELS_P non-nil means that VSCROLL is in pixels.
6432 If PIXELS-P is nil, VSCROLL may have to be rounded so that it
6433 corresponds to an integral number of pixels. The return value is the
6434 result of this rounding.
6435 If PIXELS-P is non-nil, the return value is VSCROLL. */)
6436 (window
, vscroll
, pixels_p
)
6437 Lisp_Object window
, vscroll
, pixels_p
;
6443 window
= selected_window
;
6445 CHECK_WINDOW (window
);
6446 CHECK_NUMBER_OR_FLOAT (vscroll
);
6448 w
= XWINDOW (window
);
6449 f
= XFRAME (w
->frame
);
6451 if (FRAME_WINDOW_P (f
))
6453 int old_dy
= w
->vscroll
;
6455 w
->vscroll
= - (NILP (pixels_p
)
6456 ? FRAME_LINE_HEIGHT (f
) * XFLOATINT (vscroll
)
6457 : XFLOATINT (vscroll
));
6458 w
->vscroll
= min (w
->vscroll
, 0);
6460 if (w
->vscroll
!= old_dy
)
6462 /* Adjust glyph matrix of the frame if the virtual display
6463 area becomes larger than before. */
6464 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
6467 /* Prevent redisplay shortcuts. */
6468 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
6472 return Fwindow_vscroll (window
, pixels_p
);
6476 /* Call FN for all leaf windows on frame F. FN is called with the
6477 first argument being a pointer to the leaf window, and with
6478 additional argument USER_DATA. Stops when FN returns 0. */
6481 foreach_window (f
, fn
, user_data
)
6483 int (* fn
) P_ ((struct window
*, void *));
6486 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
6490 /* Helper function for foreach_window. Call FN for all leaf windows
6491 reachable from W. FN is called with the first argument being a
6492 pointer to the leaf window, and with additional argument USER_DATA.
6493 Stop when FN returns 0. Value is 0 if stopped by FN. */
6496 foreach_window_1 (w
, fn
, user_data
)
6498 int (* fn
) P_ ((struct window
*, void *));
6503 for (cont
= 1; w
&& cont
;)
6505 if (!NILP (w
->hchild
))
6506 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
6507 else if (!NILP (w
->vchild
))
6508 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
6510 cont
= fn (w
, user_data
);
6512 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6519 /* Freeze or unfreeze the window start of W unless it is a
6520 mini-window or the selected window. FREEZE_P non-null means freeze
6521 the window start. */
6524 freeze_window_start (w
, freeze_p
)
6528 if (w
== XWINDOW (selected_window
)
6529 || MINI_WINDOW_P (w
)
6530 || (MINI_WINDOW_P (XWINDOW (selected_window
))
6531 && ! NILP (Vminibuf_scroll_window
)
6532 && w
== XWINDOW (Vminibuf_scroll_window
)))
6535 w
->frozen_window_start_p
= freeze_p
!= NULL
;
6540 /* Freeze or unfreeze the window starts of all leaf windows on frame
6541 F, except the selected window and a mini-window. FREEZE_P non-zero
6542 means freeze the window start. */
6545 freeze_window_starts (f
, freeze_p
)
6549 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
6553 /***********************************************************************
6555 ***********************************************************************/
6557 /* Return 1 if window configurations C1 and C2
6558 describe the same state of affairs. This is used by Fequal. */
6561 compare_window_configurations (c1
, c2
, ignore_positions
)
6563 int ignore_positions
;
6565 register struct save_window_data
*d1
, *d2
;
6566 struct Lisp_Vector
*sw1
, *sw2
;
6569 if (!WINDOW_CONFIGURATIONP (c1
))
6570 wrong_type_argument (Qwindow_configuration_p
, c1
);
6571 if (!WINDOW_CONFIGURATIONP (c2
))
6572 wrong_type_argument (Qwindow_configuration_p
, c2
);
6574 d1
= (struct save_window_data
*) XVECTOR (c1
);
6575 d2
= (struct save_window_data
*) XVECTOR (c2
);
6576 sw1
= XVECTOR (d1
->saved_windows
);
6577 sw2
= XVECTOR (d2
->saved_windows
);
6579 if (! EQ (d1
->frame_cols
, d2
->frame_cols
))
6581 if (! EQ (d1
->frame_lines
, d2
->frame_lines
))
6583 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
6585 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
6587 /* Don't compare the current_window field directly.
6588 Instead see w1_is_current and w2_is_current, below. */
6589 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
6591 if (! ignore_positions
)
6593 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
6595 if (! EQ (d1
->minibuf_selected_window
, d2
->minibuf_selected_window
))
6598 /* Don't compare the root_window field.
6599 We don't require the two configurations
6600 to use the same window object,
6601 and the two root windows must be equivalent
6602 if everything else compares equal. */
6603 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
6605 if (! EQ (d1
->min_width
, d2
->min_width
))
6607 if (! EQ (d1
->min_height
, d2
->min_height
))
6610 /* Verify that the two confis have the same number of windows. */
6611 if (sw1
->size
!= sw2
->size
)
6614 for (i
= 0; i
< sw1
->size
; i
++)
6616 struct saved_window
*p1
, *p2
;
6617 int w1_is_current
, w2_is_current
;
6619 p1
= SAVED_WINDOW_N (sw1
, i
);
6620 p2
= SAVED_WINDOW_N (sw2
, i
);
6622 /* Verify that the current windows in the two
6623 configurations correspond to each other. */
6624 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
6625 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
6627 if (w1_is_current
!= w2_is_current
)
6630 /* Verify that the corresponding windows do match. */
6631 if (! EQ (p1
->buffer
, p2
->buffer
))
6633 if (! EQ (p1
->left_col
, p2
->left_col
))
6635 if (! EQ (p1
->top_line
, p2
->top_line
))
6637 if (! EQ (p1
->total_cols
, p2
->total_cols
))
6639 if (! EQ (p1
->total_lines
, p2
->total_lines
))
6641 if (! EQ (p1
->display_table
, p2
->display_table
))
6643 if (! EQ (p1
->parent
, p2
->parent
))
6645 if (! EQ (p1
->prev
, p2
->prev
))
6647 if (! ignore_positions
)
6649 if (! EQ (p1
->hscroll
, p2
->hscroll
))
6651 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
6653 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
6655 if (NILP (Fequal (p1
->start
, p2
->start
)))
6657 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
6659 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
6662 if (! EQ (p1
->left_margin_cols
, p2
->left_margin_cols
))
6664 if (! EQ (p1
->right_margin_cols
, p2
->right_margin_cols
))
6666 if (! EQ (p1
->left_fringe_width
, p2
->left_fringe_width
))
6668 if (! EQ (p1
->right_fringe_width
, p2
->right_fringe_width
))
6670 if (! EQ (p1
->fringes_outside_margins
, p2
->fringes_outside_margins
))
6672 if (! EQ (p1
->scroll_bar_width
, p2
->scroll_bar_width
))
6674 if (! EQ (p1
->vertical_scroll_bar_type
, p2
->vertical_scroll_bar_type
))
6681 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
6682 Scompare_window_configurations
, 2, 2, 0,
6683 doc
: /* Compare two window configurations as regards the structure of windows.
6684 This function ignores details such as the values of point and mark
6685 and scrolling positions. */)
6689 if (compare_window_configurations (x
, y
, 1))
6697 struct frame
*f
= make_terminal_frame ();
6698 XSETFRAME (selected_frame
, f
);
6699 Vterminal_frame
= selected_frame
;
6700 minibuf_window
= f
->minibuffer_window
;
6701 selected_window
= f
->selected_window
;
6702 last_nonminibuf_frame
= f
;
6704 window_initialized
= 1;
6710 Vwindow_list
= Qnil
;
6716 Qwindow_size_fixed
= intern ("window-size-fixed");
6717 staticpro (&Qwindow_size_fixed
);
6718 Fset (Qwindow_size_fixed
, Qnil
);
6720 staticpro (&Qwindow_configuration_change_hook
);
6721 Qwindow_configuration_change_hook
6722 = intern ("window-configuration-change-hook");
6724 Qwindowp
= intern ("windowp");
6725 staticpro (&Qwindowp
);
6727 Qwindow_configuration_p
= intern ("window-configuration-p");
6728 staticpro (&Qwindow_configuration_p
);
6730 Qwindow_live_p
= intern ("window-live-p");
6731 staticpro (&Qwindow_live_p
);
6733 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
6734 staticpro (&Qtemp_buffer_show_hook
);
6736 staticpro (&Vwindow_list
);
6738 minibuf_selected_window
= Qnil
;
6739 staticpro (&minibuf_selected_window
);
6741 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
6742 doc
: /* Non-nil means call as function to display a help buffer.
6743 The function is called with one argument, the buffer to be displayed.
6744 Used by `with-output-to-temp-buffer'.
6745 If this function is used, then it must do the entire job of showing
6746 the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */);
6747 Vtemp_buffer_show_function
= Qnil
;
6749 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
6750 doc
: /* If non-nil, function to call to handle `display-buffer'.
6751 It will receive two args, the buffer and a flag which if non-nil means
6752 that the currently selected window is not acceptable.
6753 It should choose or create a window, display the specified buffer in it,
6754 and return the window.
6755 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'
6756 work using this function. */);
6757 Vdisplay_buffer_function
= Qnil
;
6759 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
6760 doc
: /* *If non-nil, `display-buffer' should even the window heights.
6761 If nil, `display-buffer' will leave the window configuration alone. */);
6762 Veven_window_heights
= Qt
;
6764 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
6765 doc
: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */);
6766 Vminibuf_scroll_window
= Qnil
;
6768 DEFVAR_BOOL ("mode-line-in-non-selected-windows", &mode_line_in_non_selected_windows
,
6769 doc
: /* Non-nil means to use `mode-line-inactive' face in non-selected windows.
6770 If the minibuffer is active, the `minibuffer-scroll-window' mode line
6771 is displayed in the `mode-line' face. */);
6772 mode_line_in_non_selected_windows
= 1;
6774 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
6775 doc
: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */);
6776 Vother_window_scroll_buffer
= Qnil
;
6778 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
6779 doc
: /* *Non-nil means `display-buffer' should make a separate frame. */);
6782 DEFVAR_BOOL ("auto-window-vscroll", &auto_window_vscroll_p
,
6783 doc
: /* *Non-nil means to automatically adjust `window-vscroll' to view tall lines. */);
6784 auto_window_vscroll_p
= 1;
6786 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
6787 doc
: /* *Non-nil means `display-buffer' should reuse frames.
6788 If the buffer in question is already displayed in a frame, raise that frame. */);
6789 display_buffer_reuse_frames
= 0;
6791 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
6792 doc
: /* Function to call to handle automatic new frame creation.
6793 It is called with no arguments and should return a newly created frame.
6795 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'
6796 where `pop-up-frame-alist' would hold the default frame parameters. */);
6797 Vpop_up_frame_function
= Qnil
;
6799 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
6800 doc
: /* *List of buffer names that should have their own special frames.
6801 Displaying a buffer with `display-buffer' or `pop-to-buffer',
6802 if its name is in this list, makes a special frame for it
6803 using `special-display-function'. See also `special-display-regexps'.
6805 An element of the list can be a list instead of just a string.
6806 There are two ways to use a list as an element:
6807 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)
6808 In the first case, the FRAME-PARAMETERS are pairs of the form
6809 \(PARAMETER . VALUE); these parameter values are used to create the frame.
6810 In the second case, FUNCTION is called with BUFFER as the first argument,
6811 followed by the OTHER-ARGS--it can display BUFFER in any way it likes.
6812 All this is done by the function found in `special-display-function'.
6814 If the specified frame parameters include (same-buffer . t), the
6815 buffer is displayed in the currently selected window. Otherwise, if
6816 they include (same-frame . t), the buffer is displayed in a new window
6817 in the currently selected frame.
6819 If this variable appears \"not to work\", because you add a name to it
6820 but that buffer still appears in the selected window, look at the
6821 values of `same-window-buffer-names' and `same-window-regexps'.
6822 Those variables take precedence over this one. */);
6823 Vspecial_display_buffer_names
= Qnil
;
6825 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
6826 doc
: /* *List of regexps saying which buffers should have their own special frames.
6827 When displaying a buffer with `display-buffer' or `pop-to-buffer',
6828 if any regexp in this list matches the buffer name, it makes a
6829 special frame for the buffer by calling `special-display-function'.
6831 An element of the list can be a list instead of just a string.
6832 There are two ways to use a list as an element:
6833 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)
6834 In the first case, the FRAME-PARAMETERS are pairs of the form
6835 \(PARAMETER . VALUE); these parameter values are used to create the frame.
6836 In the second case, FUNCTION is called with BUFFER as the first argument,
6837 followed by the OTHER-ARGS--it can display the buffer in any way it likes.
6838 All this is done by the function found in `special-display-function'.
6840 If the specified frame parameters include (same-buffer . t), the
6841 buffer is displayed in the currently selected window. Otherwise, if
6842 they include (same-frame . t), the buffer is displayed in a new window
6843 in the currently selected frame.
6845 If this variable appears \"not to work\", because you add a regexp to it
6846 but the matching buffers still appear in the selected window, look at the
6847 values of `same-window-buffer-names' and `same-window-regexps'.
6848 Those variables take precedence over this one. */);
6849 Vspecial_display_regexps
= Qnil
;
6851 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
6852 doc
: /* Function to call to make a new frame for a special buffer.
6853 It is called with two arguments, the buffer and optional buffer specific
6854 data, and should return a window displaying that buffer.
6855 The default value normally makes a separate frame for the buffer,
6856 using `special-display-frame-alist' to specify the frame parameters.
6857 But if the buffer specific data includes (same-buffer . t) then the
6858 buffer is displayed in the current selected window.
6859 Otherwise if it includes (same-frame . t) then the buffer is displayed in
6860 a new window in the currently selected frame.
6862 A buffer is special if it is listed in `special-display-buffer-names'
6863 or matches a regexp in `special-display-regexps'. */);
6864 Vspecial_display_function
= Qnil
;
6866 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
6867 doc
: /* *List of buffer names that should appear in the selected window.
6868 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'
6869 switches to it in the selected window, rather than making it appear
6870 in some other window.
6872 An element of the list can be a cons cell instead of just a string.
6873 Then the car must be a string, which specifies the buffer name.
6874 This is for compatibility with `special-display-buffer-names';
6875 the cdr of the cons cell is ignored.
6877 See also `same-window-regexps'. */);
6878 Vsame_window_buffer_names
= Qnil
;
6880 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
6881 doc
: /* *List of regexps saying which buffers should appear in the selected window.
6882 If a buffer name matches one of these regexps, then displaying it
6883 using `display-buffer' or `pop-to-buffer' switches to it
6884 in the selected window, rather than making it appear in some other window.
6886 An element of the list can be a cons cell instead of just a string.
6887 Then the car must be a string, which specifies the buffer name.
6888 This is for compatibility with `special-display-buffer-names';
6889 the cdr of the cons cell is ignored.
6891 See also `same-window-buffer-names'. */);
6892 Vsame_window_regexps
= Qnil
;
6894 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
6895 doc
: /* *Non-nil means display-buffer should make new windows. */);
6898 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
6899 doc
: /* *Number of lines of continuity when scrolling by screenfuls. */);
6900 next_screen_context_lines
= 2;
6902 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
6903 doc
: /* *A window must be at least this tall to be eligible for splitting by `display-buffer'.
6904 If there is only one window, it is split regardless of this value. */);
6905 split_height_threshold
= 500;
6907 DEFVAR_INT ("window-min-height", &window_min_height
,
6908 doc
: /* *Delete any window less than this tall (including its mode line). */);
6909 window_min_height
= 4;
6911 DEFVAR_INT ("window-min-width", &window_min_width
,
6912 doc
: /* *Delete any window less than this wide. */);
6913 window_min_width
= 10;
6915 DEFVAR_LISP ("scroll-preserve-screen-position",
6916 &Vscroll_preserve_screen_position
,
6917 doc
: /* *Non-nil means scroll commands move point to keep its screen line unchanged.
6918 This is only when it is impossible to keep point fixed and still
6919 scroll as specified. */);
6920 Vscroll_preserve_screen_position
= Qnil
;
6922 DEFVAR_LISP ("window-configuration-change-hook",
6923 &Vwindow_configuration_change_hook
,
6924 doc
: /* Functions to call when window configuration changes.
6925 The selected frame is the one whose configuration has changed. */);
6926 Vwindow_configuration_change_hook
= Qnil
;
6928 defsubr (&Sselected_window
);
6929 defsubr (&Sminibuffer_window
);
6930 defsubr (&Swindow_minibuffer_p
);
6931 defsubr (&Swindowp
);
6932 defsubr (&Swindow_live_p
);
6933 defsubr (&Spos_visible_in_window_p
);
6934 defsubr (&Swindow_buffer
);
6935 defsubr (&Swindow_height
);
6936 defsubr (&Swindow_width
);
6937 defsubr (&Swindow_hscroll
);
6938 defsubr (&Sset_window_hscroll
);
6939 defsubr (&Swindow_redisplay_end_trigger
);
6940 defsubr (&Sset_window_redisplay_end_trigger
);
6941 defsubr (&Swindow_edges
);
6942 defsubr (&Swindow_pixel_edges
);
6943 defsubr (&Swindow_inside_edges
);
6944 defsubr (&Swindow_inside_pixel_edges
);
6945 defsubr (&Scoordinates_in_window_p
);
6946 defsubr (&Swindow_at
);
6947 defsubr (&Swindow_point
);
6948 defsubr (&Swindow_start
);
6949 defsubr (&Swindow_end
);
6950 defsubr (&Sset_window_point
);
6951 defsubr (&Sset_window_start
);
6952 defsubr (&Swindow_dedicated_p
);
6953 defsubr (&Sset_window_dedicated_p
);
6954 defsubr (&Swindow_display_table
);
6955 defsubr (&Sset_window_display_table
);
6956 defsubr (&Snext_window
);
6957 defsubr (&Sprevious_window
);
6958 defsubr (&Sother_window
);
6959 defsubr (&Sget_lru_window
);
6960 defsubr (&Sget_largest_window
);
6961 defsubr (&Sget_buffer_window
);
6962 defsubr (&Sdelete_other_windows
);
6963 defsubr (&Sdelete_windows_on
);
6964 defsubr (&Sreplace_buffer_in_windows
);
6965 defsubr (&Sdelete_window
);
6966 defsubr (&Sset_window_buffer
);
6967 defsubr (&Sselect_window
);
6968 defsubr (&Sspecial_display_p
);
6969 defsubr (&Ssame_window_p
);
6970 defsubr (&Sdisplay_buffer
);
6971 defsubr (&Sforce_window_update
);
6972 defsubr (&Ssplit_window
);
6973 defsubr (&Senlarge_window
);
6974 defsubr (&Sshrink_window
);
6975 defsubr (&Sscroll_up
);
6976 defsubr (&Sscroll_down
);
6977 defsubr (&Sscroll_left
);
6978 defsubr (&Sscroll_right
);
6979 defsubr (&Sother_window_for_scrolling
);
6980 defsubr (&Sscroll_other_window
);
6981 defsubr (&Sminibuffer_selected_window
);
6982 defsubr (&Srecenter
);
6983 defsubr (&Swindow_text_height
);
6984 defsubr (&Smove_to_window_line
);
6985 defsubr (&Swindow_configuration_p
);
6986 defsubr (&Swindow_configuration_frame
);
6987 defsubr (&Sset_window_configuration
);
6988 defsubr (&Scurrent_window_configuration
);
6989 defsubr (&Ssave_window_excursion
);
6990 defsubr (&Sset_window_margins
);
6991 defsubr (&Swindow_margins
);
6992 defsubr (&Sset_window_fringes
);
6993 defsubr (&Swindow_fringes
);
6994 defsubr (&Sset_window_scroll_bars
);
6995 defsubr (&Swindow_scroll_bars
);
6996 defsubr (&Swindow_vscroll
);
6997 defsubr (&Sset_window_vscroll
);
6998 defsubr (&Scompare_window_configurations
);
6999 defsubr (&Swindow_list
);
7005 initial_define_key (control_x_map
, '1', "delete-other-windows");
7006 initial_define_key (control_x_map
, '2', "split-window");
7007 initial_define_key (control_x_map
, '0', "delete-window");
7008 initial_define_key (control_x_map
, 'o', "other-window");
7009 initial_define_key (control_x_map
, '^', "enlarge-window");
7010 initial_define_key (control_x_map
, '<', "scroll-left");
7011 initial_define_key (control_x_map
, '>', "scroll-right");
7013 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
7014 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
7015 initial_define_key (meta_map
, 'v', "scroll-down");
7017 initial_define_key (global_map
, Ctl('L'), "recenter");
7018 initial_define_key (meta_map
, 'r', "move-to-window-line");
7021 /* arch-tag: 90a9c576-0590-48f1-a5f1-6c96a0452d9f
7022 (do not change this comment) */