1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
4 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
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
->last_cursor_off_p
= p
->cursor_off_p
= 0;
277 p
->left_margin_cols
= Qnil
;
278 p
->right_margin_cols
= Qnil
;
279 p
->left_fringe_width
= Qnil
;
280 p
->right_fringe_width
= Qnil
;
281 p
->fringes_outside_margins
= Qnil
;
282 p
->scroll_bar_width
= Qnil
;
283 p
->vertical_scroll_bar_type
= Qt
;
289 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
290 doc
: /* Return the window that the cursor now appears in and commands apply to. */)
293 return selected_window
;
296 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
297 doc
: /* Return the window used now for minibuffers.
298 If the optional argument FRAME is specified, return the minibuffer window
299 used by that frame. */)
304 frame
= selected_frame
;
305 CHECK_LIVE_FRAME (frame
);
306 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
309 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
310 doc
: /* Returns non-nil if WINDOW is a minibuffer window.
311 WINDOW defaults to the selected window. */)
315 struct window
*w
= decode_window (window
);
316 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
320 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
321 Spos_visible_in_window_p
, 0, 3, 0,
322 doc
: /* Return non-nil if position POS is currently on the frame in WINDOW.
323 Return nil if that position is scrolled vertically out of view.
324 If a character is only partially visible, nil is returned, unless the
325 optional argument PARTIALLY is non-nil.
326 If POS is only out of view because of horizontal scrolling, return non-nil.
327 POS defaults to point in WINDOW; WINDOW defaults to the selected window.
329 If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil,
330 return value is a list (X Y PARTIAL) where X and Y are the pixel coordinates
331 relative to the top left corner of the window. PARTIAL is nil if the character
332 after POS is fully visible; otherwise it is a cons (RTOP . RBOT) where RTOP
333 and RBOT are the number of pixels invisible at the top and bottom of the row. */)
334 (pos
, window
, partially
)
335 Lisp_Object pos
, window
, partially
;
337 register struct window
*w
;
339 register struct buffer
*buf
;
341 Lisp_Object in_window
= Qnil
;
342 int rtop
, rbot
, fully_p
= 1;
345 w
= decode_window (window
);
346 buf
= XBUFFER (w
->buffer
);
347 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
351 CHECK_NUMBER_COERCE_MARKER (pos
);
354 else if (w
== XWINDOW (selected_window
))
357 posint
= XMARKER (w
->pointm
)->charpos
;
359 /* If position is above window start or outside buffer boundaries,
360 or if window start is out of range, position is not visible. */
361 if (posint
>= CHARPOS (top
)
362 && posint
<= BUF_ZV (buf
)
363 && CHARPOS (top
) >= BUF_BEGV (buf
)
364 && CHARPOS (top
) <= BUF_ZV (buf
)
365 && pos_visible_p (w
, posint
, &x
, &y
, &rtop
, &rbot
, NILP (partially
))
366 && (fully_p
= !rtop
&& !rbot
, (!NILP (partially
) || fully_p
)))
369 if (!NILP (in_window
) && !NILP (partially
))
370 in_window
= Fcons (make_number (x
),
371 Fcons (make_number (y
),
372 Fcons ((fully_p
? Qnil
373 : Fcons (make_number (rtop
),
374 make_number (rbot
))),
380 static struct window
*
381 decode_window (window
)
382 register Lisp_Object window
;
385 return XWINDOW (selected_window
);
387 CHECK_LIVE_WINDOW (window
);
388 return XWINDOW (window
);
391 static struct window
*
392 decode_any_window (window
)
393 register Lisp_Object window
;
396 return XWINDOW (selected_window
);
398 CHECK_WINDOW (window
);
399 return XWINDOW (window
);
402 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
403 doc
: /* Return the buffer that WINDOW is displaying.
404 WINDOW defaults to the selected window. */)
408 return decode_window (window
)->buffer
;
411 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
412 doc
: /* Return the number of lines in WINDOW (including its mode line). */)
416 return decode_any_window (window
)->total_lines
;
419 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
420 doc
: /* Return the number of display columns in WINDOW.
421 This is the width that is usable columns available for text in WINDOW.
422 If you want to find out how many columns WINDOW takes up,
423 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */)
427 return make_number (window_box_text_cols (decode_any_window (window
)));
430 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
431 doc
: /* Return the number of columns by which WINDOW is scrolled from left margin. */)
435 return decode_window (window
)->hscroll
;
438 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
439 doc
: /* Set number of columns WINDOW is scrolled from left margin to NCOL.
440 Return NCOL. NCOL should be zero or positive.
442 Note that if `automatic-hscrolling' is non-nil, you cannot scroll the
443 window so that the location of point becomes invisible. */)
445 Lisp_Object window
, ncol
;
447 struct window
*w
= decode_window (window
);
451 hscroll
= max (0, XINT (ncol
));
453 /* Prevent redisplay shortcuts when changing the hscroll. */
454 if (XINT (w
->hscroll
) != hscroll
)
455 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
457 w
->hscroll
= make_number (hscroll
);
461 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
462 Swindow_redisplay_end_trigger
, 0, 1, 0,
463 doc
: /* Return WINDOW's redisplay end trigger value.
464 See `set-window-redisplay-end-trigger' for more information. */)
468 return decode_window (window
)->redisplay_end_trigger
;
471 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
472 Sset_window_redisplay_end_trigger
, 2, 2, 0,
473 doc
: /* Set WINDOW's redisplay end trigger value to VALUE.
474 VALUE should be a buffer position (typically a marker) or nil.
475 If it is a buffer position, then if redisplay in WINDOW reaches a position
476 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
477 with two arguments: WINDOW, and the end trigger value.
478 Afterwards the end-trigger value is reset to nil. */)
480 register Lisp_Object window
, value
;
482 register struct window
*w
;
484 w
= decode_window (window
);
485 w
->redisplay_end_trigger
= value
;
489 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
490 doc
: /* Return a list of the edge coordinates of WINDOW.
491 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
492 RIGHT is one more than the rightmost column occupied by WINDOW,
493 and BOTTOM is one more than the bottommost row occupied by WINDOW.
494 The edges include the space used by the window's scroll bar,
495 display margins, fringes, header line, and mode line, if it has them.
496 To get the edges of the actual text area, use `window-inside-edges'. */)
500 register struct window
*w
= decode_any_window (window
);
502 return Fcons (make_number (WINDOW_LEFT_EDGE_COL (w
)),
503 Fcons (make_number (WINDOW_TOP_EDGE_LINE (w
)),
504 Fcons (make_number (WINDOW_RIGHT_EDGE_COL (w
)),
505 Fcons (make_number (WINDOW_BOTTOM_EDGE_LINE (w
)),
509 DEFUN ("window-pixel-edges", Fwindow_pixel_edges
, Swindow_pixel_edges
, 0, 1, 0,
510 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
511 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
512 RIGHT is one more than the rightmost x position occupied by WINDOW,
513 and BOTTOM is one more than the bottommost y position occupied by WINDOW.
514 The pixel edges include the space used by the window's scroll bar,
515 display margins, fringes, header line, and mode line, if it has them.
516 To get the edges of the actual text area, use `window-inside-pixel-edges'. */)
520 register struct window
*w
= decode_any_window (window
);
522 return Fcons (make_number (WINDOW_LEFT_EDGE_X (w
)),
523 Fcons (make_number (WINDOW_TOP_EDGE_Y (w
)),
524 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w
)),
525 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w
)),
529 DEFUN ("window-inside-edges", Fwindow_inside_edges
, Swindow_inside_edges
, 0, 1, 0,
530 doc
: /* Return a list of the edge coordinates of WINDOW.
531 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
532 RIGHT is one more than the rightmost column used by text in WINDOW,
533 and BOTTOM is one more than the bottommost row used by text in WINDOW.
534 The inside edges do not include the space used by the window's scroll bar,
535 display margins, fringes, header line, and/or mode line. */)
539 register struct window
*w
= decode_any_window (window
);
541 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_COL (w
)
542 + WINDOW_LEFT_MARGIN_COLS (w
)
543 + WINDOW_LEFT_FRINGE_COLS (w
)),
544 make_number (WINDOW_TOP_EDGE_LINE (w
)
545 + WINDOW_HEADER_LINE_LINES (w
)),
546 make_number (WINDOW_BOX_RIGHT_EDGE_COL (w
)
547 - WINDOW_RIGHT_MARGIN_COLS (w
)
548 - WINDOW_RIGHT_FRINGE_COLS (w
)),
549 make_number (WINDOW_BOTTOM_EDGE_LINE (w
)
550 - WINDOW_MODE_LINE_LINES (w
)));
553 DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges
, Swindow_inside_pixel_edges
, 0, 1, 0,
554 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
555 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
556 RIGHT is one more than the rightmost x position used by text in WINDOW,
557 and BOTTOM is one more than the bottommost y position used by text in WINDOW.
558 The inside edges do not include the space used by the window's scroll bar,
559 display margins, fringes, header line, and/or mode line. */)
563 register struct window
*w
= decode_any_window (window
);
565 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w
)
566 + WINDOW_LEFT_MARGIN_WIDTH (w
)
567 + WINDOW_LEFT_FRINGE_WIDTH (w
)),
568 make_number (WINDOW_TOP_EDGE_Y (w
)
569 + WINDOW_HEADER_LINE_HEIGHT (w
)),
570 make_number (WINDOW_BOX_RIGHT_EDGE_X (w
)
571 - WINDOW_RIGHT_MARGIN_WIDTH (w
)
572 - WINDOW_RIGHT_FRINGE_WIDTH (w
)),
573 make_number (WINDOW_BOTTOM_EDGE_Y (w
)
574 - WINDOW_MODE_LINE_HEIGHT (w
)));
577 /* Test if the character at column *X, row *Y is within window W.
578 If it is not, return ON_NOTHING;
579 if it is in the window's text area,
580 set *x and *y to its location relative to the upper left corner
583 if it is on the window's modeline, return ON_MODE_LINE;
584 if it is on the border between the window and its right sibling,
585 return ON_VERTICAL_BORDER.
586 if it is on a scroll bar,
587 return ON_SCROLL_BAR.
588 if it is on the window's top line, return ON_HEADER_LINE;
589 if it is in left or right fringe of the window,
590 return ON_LEFT_FRINGE or ON_RIGHT_FRINGE, and convert *X and *Y
591 to window-relative coordinates;
592 if it is in the marginal area to the left/right of the window,
593 return ON_LEFT_MARGIN or ON_RIGHT_MARGIN, and convert *X and *Y
594 to window-relative coordinates.
596 X and Y are frame relative pixel coordinates. */
598 static enum window_part
599 coordinates_in_window (w
, x
, y
)
600 register struct window
*w
;
603 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
604 int left_x
, right_x
, top_y
, bottom_y
;
605 enum window_part part
;
606 int ux
= FRAME_COLUMN_WIDTH (f
);
607 int x0
= WINDOW_LEFT_EDGE_X (w
);
608 int x1
= WINDOW_RIGHT_EDGE_X (w
);
609 /* The width of the area where the vertical line can be dragged.
610 (Between mode lines for instance. */
611 int grabbable_width
= ux
;
612 int lmargin_width
, rmargin_width
, text_left
, text_right
;
614 /* In what's below, we subtract 1 when computing right_x because we
615 want the rightmost pixel, which is given by left_pixel+width-1. */
616 if (w
->pseudo_window_p
)
619 right_x
= WINDOW_TOTAL_WIDTH (w
) - 1;
620 top_y
= WINDOW_TOP_EDGE_Y (w
);
621 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
625 left_x
= WINDOW_BOX_LEFT_EDGE_X (w
);
626 right_x
= WINDOW_BOX_RIGHT_EDGE_X (w
) - 1;
627 top_y
= WINDOW_TOP_EDGE_Y (w
);
628 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
631 /* Outside any interesting row? */
632 if (*y
< top_y
|| *y
>= bottom_y
)
635 /* On the mode line or header line? If it's near the start of
636 the mode or header line of window that's has a horizontal
637 sibling, say it's on the vertical line. That's to be able
638 to resize windows horizontally in case we're using toolkit
641 if (WINDOW_WANTS_MODELINE_P (w
)
642 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
))
646 header_vertical_border_check
:
647 /* We're somewhere on the mode line. We consider the place
648 between mode lines of horizontally adjacent mode lines
649 as the vertical border. If scroll bars on the left,
650 return the right window. */
651 if (WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w
)
652 || WINDOW_RIGHTMOST_P (w
))
654 if (!WINDOW_LEFTMOST_P (w
) && abs (*x
- x0
) < grabbable_width
)
655 return ON_VERTICAL_BORDER
;
659 if (abs (*x
- x1
) < grabbable_width
)
660 return ON_VERTICAL_BORDER
;
663 if (*x
< x0
|| *x
>= x1
)
666 /* Convert X and Y to window relative coordinates.
667 Mode line starts at left edge of window. */
673 if (WINDOW_WANTS_HEADER_LINE_P (w
)
674 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
))
676 part
= ON_HEADER_LINE
;
677 goto header_vertical_border_check
;
680 if (*x
< x0
|| *x
>= x1
)
683 /* Outside any interesting column? */
684 if (*x
< left_x
|| *x
> right_x
)
685 return ON_SCROLL_BAR
;
687 lmargin_width
= window_box_width (w
, LEFT_MARGIN_AREA
);
688 rmargin_width
= window_box_width (w
, RIGHT_MARGIN_AREA
);
690 text_left
= window_box_left (w
, TEXT_AREA
);
691 text_right
= text_left
+ window_box_width (w
, TEXT_AREA
);
693 if (FRAME_WINDOW_P (f
))
695 if (!w
->pseudo_window_p
696 && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w
)
697 && !WINDOW_RIGHTMOST_P (w
)
698 && (abs (*x
- right_x
) < grabbable_width
))
699 return ON_VERTICAL_BORDER
;
703 /* Need to say "*x > right_x" rather than >=, since on character
704 terminals, the vertical line's x coordinate is right_x. */
705 if (!w
->pseudo_window_p
706 && !WINDOW_RIGHTMOST_P (w
)
707 && *x
> right_x
- ux
)
709 /* On the border on the right side of the window? Assume that
710 this area begins at RIGHT_X minus a canonical char width. */
711 return ON_VERTICAL_BORDER
;
717 if (lmargin_width
> 0
718 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
719 ? (*x
>= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
))
720 : (*x
< left_x
+ lmargin_width
)))
723 if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
724 *x
-= WINDOW_LEFT_FRINGE_WIDTH (w
);
726 return ON_LEFT_MARGIN
;
729 /* Convert X and Y to window-relative pixel coordinates. */
732 return ON_LEFT_FRINGE
;
735 if (*x
>= text_right
)
737 if (rmargin_width
> 0
738 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
739 ? (*x
< right_x
- WINDOW_RIGHT_FRINGE_WIDTH (w
))
740 : (*x
>= right_x
- rmargin_width
)))
743 if (!WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
744 *x
-= WINDOW_RIGHT_FRINGE_WIDTH (w
);
746 return ON_RIGHT_MARGIN
;
749 /* Convert X and Y to window-relative pixel coordinates. */
750 *x
-= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
);
752 return ON_RIGHT_FRINGE
;
755 /* Everything special ruled out - must be on text area */
756 *x
-= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
);
762 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
763 Scoordinates_in_window_p
, 2, 2, 0,
764 doc
: /* Return non-nil if COORDINATES are in WINDOW.
765 COORDINATES is a cons of the form (X . Y), X and Y being distances
766 measured in characters from the upper-left corner of the frame.
767 \(0 . 0) denotes the character in the upper left corner of the
769 If COORDINATES are in the text portion of WINDOW,
770 the coordinates relative to the window are returned.
771 If they are in the mode line of WINDOW, `mode-line' is returned.
772 If they are in the top mode line of WINDOW, `header-line' is returned.
773 If they are in the left fringe of WINDOW, `left-fringe' is returned.
774 If they are in the right fringe of WINDOW, `right-fringe' is returned.
775 If they are on the border between WINDOW and its right sibling,
776 `vertical-line' is returned.
777 If they are in the windows's left or right marginal areas, `left-margin'\n\
778 or `right-margin' is returned. */)
779 (coordinates
, window
)
780 register Lisp_Object coordinates
, window
;
787 CHECK_WINDOW (window
);
788 w
= XWINDOW (window
);
789 f
= XFRAME (w
->frame
);
790 CHECK_CONS (coordinates
);
791 lx
= Fcar (coordinates
);
792 ly
= Fcdr (coordinates
);
793 CHECK_NUMBER_OR_FLOAT (lx
);
794 CHECK_NUMBER_OR_FLOAT (ly
);
795 x
= FRAME_PIXEL_X_FROM_CANON_X (f
, lx
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
796 y
= FRAME_PIXEL_Y_FROM_CANON_Y (f
, ly
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
798 switch (coordinates_in_window (w
, &x
, &y
))
804 /* X and Y are now window relative pixel coordinates. Convert
805 them to canonical char units before returning them. */
806 return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f
, x
),
807 FRAME_CANON_Y_FROM_PIXEL_Y (f
, y
));
812 case ON_VERTICAL_BORDER
:
813 return Qvertical_line
;
821 case ON_RIGHT_FRINGE
:
822 return Qright_fringe
;
827 case ON_RIGHT_MARGIN
:
828 return Qright_margin
;
831 /* Historically we are supposed to return nil in this case. */
840 /* Callback for foreach_window, used in window_from_coordinates.
841 Check if window W contains coordinates specified by USER_DATA which
842 is actually a pointer to a struct check_window_data CW.
844 Check if window W contains coordinates *CW->x and *CW->y. If it
845 does, return W in *CW->window, as Lisp_Object, and return in
846 *CW->part the part of the window under coordinates *X,*Y. Return
847 zero from this function to stop iterating over windows. */
849 struct check_window_data
853 enum window_part
*part
;
857 check_window_containing (w
, user_data
)
861 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
862 enum window_part found
;
865 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
866 if (found
!= ON_NOTHING
)
869 XSETWINDOW (*cw
->window
, w
);
877 /* Find the window containing frame-relative pixel position X/Y and
878 return it as a Lisp_Object.
880 If X, Y is on one of the window's special `window_part' elements,
881 set *PART to the id of that element, and return X and Y converted
882 to window relative coordinates in WX and WY.
884 If there is no window under X, Y return nil and leave *PART
885 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
887 This function was previously implemented with a loop cycling over
888 windows with Fnext_window, and starting with the frame's selected
889 window. It turned out that this doesn't work with an
890 implementation of next_window using Vwindow_list, because
891 FRAME_SELECTED_WINDOW (F) is not always contained in the window
892 tree of F when this function is called asynchronously from
893 note_mouse_highlight. The original loop didn't terminate in this
897 window_from_coordinates (f
, x
, y
, part
, wx
, wy
, tool_bar_p
)
900 enum window_part
*part
;
905 struct check_window_data cw
;
906 enum window_part dummy
;
912 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
913 foreach_window (f
, check_window_containing
, &cw
);
915 /* If not found above, see if it's in the tool bar window, if a tool
919 && WINDOWP (f
->tool_bar_window
)
920 && WINDOW_TOTAL_LINES (XWINDOW (f
->tool_bar_window
)) > 0
921 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
)
925 window
= f
->tool_bar_window
;
934 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
935 doc
: /* Return window containing coordinates X and Y on FRAME.
936 If omitted, FRAME defaults to the currently selected frame.
937 The top left corner of the frame is considered to be row 0,
940 Lisp_Object x
, y
, frame
;
945 frame
= selected_frame
;
946 CHECK_LIVE_FRAME (frame
);
949 /* Check that arguments are integers or floats. */
950 CHECK_NUMBER_OR_FLOAT (x
);
951 CHECK_NUMBER_OR_FLOAT (y
);
953 return window_from_coordinates (f
,
954 (FRAME_PIXEL_X_FROM_CANON_X (f
, x
)
955 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
956 (FRAME_PIXEL_Y_FROM_CANON_Y (f
, y
)
957 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
961 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
962 doc
: /* Return current value of point in WINDOW.
963 For a nonselected window, this is the value point would have
964 if that window were selected.
966 Note that, when WINDOW is the selected window and its buffer
967 is also currently selected, the value returned is the same as (point).
968 It would be more strictly correct to return the `top-level' value
969 of point, outside of any save-excursion forms.
970 But that is hard to define. */)
974 register struct window
*w
= decode_window (window
);
976 if (w
== XWINDOW (selected_window
)
977 && current_buffer
== XBUFFER (w
->buffer
))
979 return Fmarker_position (w
->pointm
);
982 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
983 doc
: /* Return position at which display currently starts in WINDOW.
984 This is updated by redisplay or by calling `set-window-start'. */)
988 return Fmarker_position (decode_window (window
)->start
);
991 /* This is text temporarily removed from the doc string below.
993 This function returns nil if the position is not currently known.
994 That happens when redisplay is preempted and doesn't finish.
995 If in that case you want to compute where the end of the window would
996 have been if redisplay had finished, do this:
998 (goto-char (window-start window))
999 (vertical-motion (1- (window-height window)) window)
1002 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
1003 doc
: /* Return position at which display currently ends in WINDOW.
1004 This is updated by redisplay, when it runs to completion.
1005 Simply changing the buffer text or setting `window-start'
1006 does not update this value.
1007 Return nil if there is no recorded value. \(This can happen if the
1008 last redisplay of WINDOW was preempted, and did not finish.)
1009 If UPDATE is non-nil, compute the up-to-date position
1010 if it isn't already recorded. */)
1012 Lisp_Object window
, update
;
1015 struct window
*w
= decode_window (window
);
1021 #if 0 /* This change broke some things. We should make it later. */
1022 /* If we don't know the end position, return nil.
1023 The user can compute it with vertical-motion if he wants to.
1024 It would be nicer to do it automatically,
1025 but that's so slow that it would probably bother people. */
1026 if (NILP (w
->window_end_valid
))
1031 && ! (! NILP (w
->window_end_valid
)
1032 && 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 struct buffer
*old
= current_buffer
;
2444 current_buffer
= XBUFFER (w
->buffer
);
2445 val
= find_symbol_value (Qwindow_size_fixed
);
2446 current_buffer
= old
;
2449 if (!EQ (val
, Qunbound
))
2451 fixed_p
= !NILP (val
);
2454 && ((EQ (val
, Qheight
) && width_p
)
2455 || (EQ (val
, Qwidth
) && !width_p
)))
2459 /* Can't tell if this one is resizable without looking at
2460 siblings. If all siblings are fixed-size this one is too. */
2461 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2465 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2466 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2470 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2471 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2485 /* Return the minimum size of window W, not taking fixed-width windows
2486 into account. WIDTH_P non-zero means return the minimum width,
2487 otherwise return the minimum height. If W is a combination window,
2488 compute the minimum size from the minimum sizes of W's children. */
2491 window_min_size_1 (w
, width_p
)
2498 if (!NILP (w
->hchild
))
2500 c
= XWINDOW (w
->hchild
);
2505 /* The min width of a horizontal combination is
2506 the sum of the min widths of its children. */
2509 size
+= window_min_size_1 (c
, width_p
);
2510 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2515 /* The min height a horizontal combination equals
2516 the maximum of all min height of its children. */
2519 int min_size
= window_min_size_1 (c
, width_p
);
2520 size
= max (min_size
, size
);
2521 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2525 else if (!NILP (w
->vchild
))
2527 c
= XWINDOW (w
->vchild
);
2532 /* The min width of a vertical combination is
2533 the maximum of the min widths of its children. */
2536 int min_size
= window_min_size_1 (c
, width_p
);
2537 size
= max (min_size
, size
);
2538 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2543 /* The min height of a vertical combination equals
2544 the sum of the min height of its children. */
2547 size
+= window_min_size_1 (c
, width_p
);
2548 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2555 size
= window_min_width
;
2558 if (MINI_WINDOW_P (w
)
2559 || (!WINDOW_WANTS_MODELINE_P (w
)
2560 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2563 size
= window_min_height
;
2571 /* Return the minimum size of window W, taking fixed-size windows into
2572 account. WIDTH_P non-zero means return the minimum width,
2573 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2574 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2575 unless FIXED is null. */
2578 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2580 int width_p
, ignore_fixed_p
, *fixed
;
2587 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2593 size
= width_p
? XFASTINT (w
->total_cols
) : XFASTINT (w
->total_lines
);
2595 size
= window_min_size_1 (w
, width_p
);
2601 /* Adjust the margins of window W if text area is too small.
2602 Return 1 if window width is ok after adjustment; 0 if window
2603 is still too narrow. */
2606 adjust_window_margins (w
)
2609 int box_cols
= (WINDOW_TOTAL_COLS (w
)
2610 - WINDOW_FRINGE_COLS (w
)
2611 - WINDOW_SCROLL_BAR_COLS (w
));
2612 int margin_cols
= (WINDOW_LEFT_MARGIN_COLS (w
)
2613 + WINDOW_RIGHT_MARGIN_COLS (w
));
2615 if (box_cols
- margin_cols
>= MIN_SAFE_WINDOW_WIDTH
)
2618 if (margin_cols
< 0 || box_cols
< MIN_SAFE_WINDOW_WIDTH
)
2621 /* Window's text area is too narrow, but reducing the window
2622 margins will fix that. */
2623 margin_cols
= box_cols
- MIN_SAFE_WINDOW_WIDTH
;
2624 if (WINDOW_RIGHT_MARGIN_COLS (w
) > 0)
2626 if (WINDOW_LEFT_MARGIN_COLS (w
) > 0)
2627 w
->left_margin_cols
= w
->right_margin_cols
2628 = make_number (margin_cols
/2);
2630 w
->right_margin_cols
= make_number (margin_cols
);
2633 w
->left_margin_cols
= make_number (margin_cols
);
2637 /* Calculate new sizes for windows in the list FORWARD when the window size
2638 goes from TOTAL to SIZE. TOTAL must be greater than SIZE.
2639 The number of windows in FORWARD is NCHILDREN, and the number that
2640 can shrink is SHRINKABLE.
2641 The minimum size a window can have is MIN_SIZE.
2642 If we are shrinking fixed windows, RESIZE_FIXED_P is non-zero.
2643 If we are shrinking columns, WIDTH_P is non-zero, otherwise we are
2646 This function returns an allocated array of new sizes that the caller
2647 must free. The size -1 means the window is fixed and RESIZE_FIXED_P
2648 is zero. Array index 0 refers to the first window in FORWARD, 1 to
2649 the second, and so on.
2651 This function tries to keep windows at least at the minimum size
2652 and resize other windows before it resizes any window to zero (i.e.
2653 delete that window).
2655 Windows are resized proportional to their size, so bigger windows
2656 shrink more than smaller windows. */
2658 shrink_windows (total
, size
, nchildren
, shrinkable
,
2659 min_size
, resize_fixed_p
, forward
, width_p
)
2660 int total
, size
, nchildren
, shrinkable
, min_size
;
2661 int resize_fixed_p
, width_p
;
2662 Lisp_Object forward
;
2664 int available_resize
= 0;
2668 int smallest
= total
;
2669 int total_removed
= 0;
2670 int total_shrink
= total
- size
;
2673 new_sizes
= xmalloc (sizeof (*new_sizes
) * nchildren
);
2675 for (i
= 0, child
= forward
; !NILP (child
); child
= c
->next
, ++i
)
2679 c
= XWINDOW (child
);
2680 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2682 if (! resize_fixed_p
&& window_fixed_size_p (c
, width_p
, 0))
2686 new_sizes
[i
] = child_size
;
2687 if (child_size
> min_size
)
2688 available_resize
+= child_size
- min_size
;
2691 /* We might need to shrink some windows to zero. Find the smallest
2692 windows and set them to 0 until we can fulfil the new size. */
2694 while (shrinkable
> 1 && size
+ available_resize
< total
)
2696 for (i
= 0; i
< nchildren
; ++i
)
2697 if (new_sizes
[i
] > 0 && smallest
> new_sizes
[i
])
2698 smallest
= new_sizes
[i
];
2700 for (i
= 0; i
< nchildren
; ++i
)
2701 if (new_sizes
[i
] == smallest
)
2703 /* Resize this window down to zero. */
2705 if (smallest
> min_size
)
2706 available_resize
-= smallest
- min_size
;
2707 available_resize
+= smallest
;
2709 total_removed
+= smallest
;
2711 /* We don't know what the smallest is now. */
2714 /* Out of for, just remove one window at the time and
2715 check again if we have enough space. */
2720 /* Now, calculate the new sizes. Try to shrink each window
2721 proportional to its size. */
2722 for (i
= 0; i
< nchildren
; ++i
)
2724 if (new_sizes
[i
] > min_size
)
2726 int to_shrink
= total_shrink
*new_sizes
[i
]/total
;
2727 if (new_sizes
[i
] - to_shrink
< min_size
)
2728 to_shrink
= new_sizes
[i
] - min_size
;
2729 new_sizes
[i
] -= to_shrink
;
2730 total_removed
+= to_shrink
;
2734 /* Any reminder due to rounding, we just subtract from windows
2735 that are left and still can be shrunk. */
2736 while (total_shrink
> total_removed
)
2738 int nonzero_sizes
= 0;
2739 int nonzero_idx
= -1;
2741 for (i
= 0; i
< nchildren
; ++i
)
2742 if (new_sizes
[i
] > 0)
2748 for (i
= 0; i
< nchildren
; ++i
)
2749 if (new_sizes
[i
] > min_size
)
2754 /* Out of for, just shrink one window at the time and
2755 check again if we have enough space. */
2760 /* Special case, only one window left. */
2761 if (nonzero_sizes
== 1)
2765 /* Any surplus due to rounding, we add to windows that are left. */
2766 while (total_shrink
< total_removed
)
2768 for (i
= 0; i
< nchildren
; ++i
)
2770 if (new_sizes
[i
] != 0 && total_shrink
< total_removed
)
2782 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2783 WINDOW's width. Resize WINDOW's children, if any, so that they
2784 keep their proportionate size relative to WINDOW. Propagate
2785 WINDOW's top or left edge position to children. Delete windows
2786 that become too small unless NODELETE_P is non-zero.
2788 If NODELETE_P is 2, that means we do delete windows that are
2789 too small, even if they were too small before! */
2792 size_window (window
, size
, width_p
, nodelete_p
)
2794 int size
, width_p
, nodelete_p
;
2796 struct window
*w
= XWINDOW (window
);
2798 Lisp_Object child
, *forward
, *sideward
;
2799 int old_size
, min_size
, safe_min_size
;
2801 /* We test nodelete_p != 2 and nodelete_p != 1 below, so it
2802 seems like it's too soon to do this here. ++KFS. */
2803 if (nodelete_p
== 2)
2806 check_min_window_sizes ();
2807 size
= max (0, size
);
2809 /* If the window has been "too small" at one point,
2810 don't delete it for being "too small" in the future.
2811 Preserve it as long as that is at all possible. */
2814 old_size
= WINDOW_TOTAL_COLS (w
);
2815 min_size
= window_min_width
;
2816 /* Ensure that there is room for the scroll bar and fringes!
2817 We may reduce display margins though. */
2818 safe_min_size
= (MIN_SAFE_WINDOW_WIDTH
2819 + WINDOW_FRINGE_COLS (w
)
2820 + WINDOW_SCROLL_BAR_COLS (w
));
2824 old_size
= XINT (w
->total_lines
);
2825 min_size
= window_min_height
;
2826 safe_min_size
= MIN_SAFE_WINDOW_HEIGHT
;
2829 if (old_size
< min_size
&& nodelete_p
!= 2)
2830 w
->too_small_ok
= Qt
;
2832 /* Maybe delete WINDOW if it's too small. */
2833 if (nodelete_p
!= 1 && !NILP (w
->parent
))
2835 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2836 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2837 if (min_size
< safe_min_size
)
2838 min_size
= safe_min_size
;
2839 if (size
< min_size
)
2841 delete_window (window
);
2846 /* Set redisplay hints. */
2847 w
->last_modified
= make_number (0);
2848 w
->last_overlay_modified
= make_number (0);
2849 windows_or_buffers_changed
++;
2850 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2854 sideward
= &w
->vchild
;
2855 forward
= &w
->hchild
;
2856 w
->total_cols
= make_number (size
);
2857 adjust_window_margins (w
);
2861 sideward
= &w
->hchild
;
2862 forward
= &w
->vchild
;
2863 w
->total_lines
= make_number (size
);
2864 w
->orig_total_lines
= Qnil
;
2867 if (!NILP (*sideward
))
2869 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2871 c
= XWINDOW (child
);
2873 c
->left_col
= w
->left_col
;
2875 c
->top_line
= w
->top_line
;
2876 size_window (child
, size
, width_p
, nodelete_p
);
2879 else if (!NILP (*forward
))
2881 int fixed_size
, each
, extra
, n
;
2882 int resize_fixed_p
, nfixed
;
2883 int last_pos
, first_pos
, nchildren
, total
;
2884 int *new_sizes
= NULL
;
2886 /* Determine the fixed-size portion of the this window, and the
2887 number of child windows. */
2888 fixed_size
= nchildren
= nfixed
= total
= 0;
2889 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2893 c
= XWINDOW (child
);
2894 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2895 total
+= child_size
;
2897 if (window_fixed_size_p (c
, width_p
, 0))
2899 fixed_size
+= child_size
;
2904 /* If the new size is smaller than fixed_size, or if there
2905 aren't any resizable windows, allow resizing fixed-size
2907 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2909 /* Compute how many lines/columns to add/remove to each child. The
2910 value of extra takes care of rounding errors. */
2911 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2912 if (size
< total
&& n
> 1)
2913 new_sizes
= shrink_windows (total
, size
, nchildren
, n
, min_size
,
2914 resize_fixed_p
, *forward
, width_p
);
2917 each
= (size
- total
) / n
;
2918 extra
= (size
- total
) - n
* each
;
2921 /* Compute new children heights and edge positions. */
2922 first_pos
= width_p
? XINT (w
->left_col
) : XINT (w
->top_line
);
2923 last_pos
= first_pos
;
2924 for (n
= 0, child
= *forward
; !NILP (child
); child
= c
->next
, ++n
)
2926 int new_size
, old_size
;
2928 c
= XWINDOW (child
);
2929 old_size
= width_p
? XFASTINT (c
->total_cols
) : XFASTINT (c
->total_lines
);
2930 new_size
= old_size
;
2932 /* The top or left edge position of this child equals the
2933 bottom or right edge of its predecessor. */
2935 c
->left_col
= make_number (last_pos
);
2937 c
->top_line
= make_number (last_pos
);
2939 /* If this child can be resized, do it. */
2940 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2942 new_size
= new_sizes
? new_sizes
[n
] : old_size
+ each
+ extra
;
2946 /* Set new height. Note that size_window also propagates
2947 edge positions to children, so it's not a no-op if we
2948 didn't change the child's size. */
2949 size_window (child
, new_size
, width_p
, 1);
2951 /* Remember the bottom/right edge position of this child; it
2952 will be used to set the top/left edge of the next child. */
2953 last_pos
+= new_size
;
2956 if (new_sizes
) xfree (new_sizes
);
2958 /* We should have covered the parent exactly with child windows. */
2959 xassert (size
== last_pos
- first_pos
);
2961 /* Now delete any children that became too small. */
2963 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2966 c
= XWINDOW (child
);
2967 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2968 size_window (child
, child_size
, width_p
, 2);
2973 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2974 WINDOW's children. NODELETE non-zero means don't delete windows
2975 that become too small in the process. (The caller should check
2976 later and do so if appropriate.) */
2979 set_window_height (window
, height
, nodelete
)
2984 size_window (window
, height
, 0, nodelete
);
2988 /* Set WINDOW's width to WIDTH, and recursively change the width of
2989 WINDOW's children. NODELETE non-zero means don't delete windows
2990 that become too small in the process. (The caller should check
2991 later and do so if appropriate.) */
2994 set_window_width (window
, width
, nodelete
)
2999 size_window (window
, width
, 1, nodelete
);
3002 /* Change window heights in windows rooted in WINDOW by N lines. */
3005 change_window_heights (window
, n
)
3009 struct window
*w
= XWINDOW (window
);
3011 XSETFASTINT (w
->top_line
, XFASTINT (w
->top_line
) + n
);
3012 XSETFASTINT (w
->total_lines
, XFASTINT (w
->total_lines
) - n
);
3014 if (INTEGERP (w
->orig_top_line
))
3015 XSETFASTINT (w
->orig_top_line
, XFASTINT (w
->orig_top_line
) + n
);
3016 if (INTEGERP (w
->orig_total_lines
))
3017 XSETFASTINT (w
->orig_total_lines
, XFASTINT (w
->orig_total_lines
) - n
);
3019 /* Handle just the top child in a vertical split. */
3020 if (!NILP (w
->vchild
))
3021 change_window_heights (w
->vchild
, n
);
3023 /* Adjust all children in a horizontal split. */
3024 for (window
= w
->hchild
; !NILP (window
); window
= w
->next
)
3026 w
= XWINDOW (window
);
3027 change_window_heights (window
, n
);
3032 int window_select_count
;
3035 Fset_window_buffer_unwind (obuf
)
3042 EXFUN (Fset_window_fringes
, 4);
3043 EXFUN (Fset_window_scroll_bars
, 4);
3045 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
3046 means it's allowed to run hooks. See make_frame for a case where
3047 it's not allowed. KEEP_MARGINS_P non-zero means that the current
3048 margins, fringes, and scroll-bar settings of the window are not
3049 reset from the buffer's local settings. */
3052 set_window_buffer (window
, buffer
, run_hooks_p
, keep_margins_p
)
3053 Lisp_Object window
, buffer
;
3054 int run_hooks_p
, keep_margins_p
;
3056 struct window
*w
= XWINDOW (window
);
3057 struct buffer
*b
= XBUFFER (buffer
);
3058 int count
= SPECPDL_INDEX ();
3062 if (EQ (window
, selected_window
))
3063 b
->last_selected_window
= window
;
3065 /* Let redisplay errors through. */
3066 b
->display_error_modiff
= 0;
3068 /* Update time stamps of buffer display. */
3069 if (INTEGERP (b
->display_count
))
3070 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
3071 b
->display_time
= Fcurrent_time ();
3073 XSETFASTINT (w
->window_end_pos
, 0);
3074 XSETFASTINT (w
->window_end_vpos
, 0);
3075 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
3076 w
->window_end_valid
= Qnil
;
3077 w
->hscroll
= w
->min_hscroll
= make_number (0);
3079 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
3080 set_marker_restricted (w
->start
,
3081 make_number (b
->last_window_start
),
3083 w
->start_at_line_beg
= Qnil
;
3084 w
->force_start
= Qnil
;
3085 XSETFASTINT (w
->last_modified
, 0);
3086 XSETFASTINT (w
->last_overlay_modified
, 0);
3087 windows_or_buffers_changed
++;
3089 /* We must select BUFFER for running the window-scroll-functions.
3090 If WINDOW is selected, switch permanently.
3091 Otherwise, switch but go back to the ambient buffer afterward. */
3092 if (EQ (window
, selected_window
))
3093 Fset_buffer (buffer
);
3094 /* We can't check ! NILP (Vwindow_scroll_functions) here
3095 because that might itself be a local variable. */
3096 else if (window_initialized
)
3098 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
3099 Fset_buffer (buffer
);
3102 if (!keep_margins_p
)
3104 /* Set left and right marginal area width etc. from buffer. */
3106 /* This may call adjust_window_margins three times, so
3107 temporarily disable window margins. */
3108 Lisp_Object save_left
= w
->left_margin_cols
;
3109 Lisp_Object save_right
= w
->right_margin_cols
;
3111 w
->left_margin_cols
= w
->right_margin_cols
= Qnil
;
3113 Fset_window_fringes (window
,
3114 b
->left_fringe_width
, b
->right_fringe_width
,
3115 b
->fringes_outside_margins
);
3117 Fset_window_scroll_bars (window
,
3118 b
->scroll_bar_width
,
3119 b
->vertical_scroll_bar_type
, Qnil
);
3121 w
->left_margin_cols
= save_left
;
3122 w
->right_margin_cols
= save_right
;
3124 Fset_window_margins (window
,
3125 b
->left_margin_cols
, b
->right_margin_cols
);
3130 if (! NILP (Vwindow_scroll_functions
))
3131 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
3132 Fmarker_position (w
->start
));
3134 if (! NILP (Vwindow_configuration_change_hook
)
3135 && ! NILP (Vrun_hooks
))
3136 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3139 unbind_to (count
, Qnil
);
3143 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 3, 0,
3144 doc
: /* Make WINDOW display BUFFER as its contents.
3145 BUFFER can be a buffer or the name of an existing buffer.
3146 Optional third arg KEEP-MARGINS non-nil means that WINDOW's current
3147 display margins, fringe widths, and scroll bar settings are maintained;
3148 the default is to reset these from BUFFER's local settings or the frame
3151 This function runs the hook `window-scroll-functions'. */)
3152 (window
, buffer
, keep_margins
)
3153 register Lisp_Object window
, buffer
, keep_margins
;
3155 register Lisp_Object tem
;
3156 register struct window
*w
= decode_window (window
);
3158 XSETWINDOW (window
, w
);
3159 buffer
= Fget_buffer (buffer
);
3160 CHECK_BUFFER (buffer
);
3162 if (NILP (XBUFFER (buffer
)->name
))
3163 error ("Attempt to display deleted buffer");
3167 error ("Window is deleted");
3168 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
3169 is first being set up. */
3171 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
3172 error ("Window is dedicated to `%s'",
3173 SDATA (XBUFFER (tem
)->name
));
3178 set_window_buffer (window
, buffer
, 1, !NILP (keep_margins
));
3182 /* Note that selected_window can be nil
3183 when this is called from Fset_window_configuration. */
3185 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 2, 0,
3186 doc
: /* Select WINDOW. Most editing will apply to WINDOW's buffer.
3187 If WINDOW is not already selected, make WINDOW's buffer current
3188 and make WINDOW the frame's selected window. Return WINDOW.
3189 Optional second arg NORECORD non-nil means
3190 do not put this buffer at the front of the list of recently selected ones.
3192 Note that the main editor command loop
3193 selects the buffer of the selected window before each command. */)
3195 register Lisp_Object window
, norecord
;
3197 register struct window
*w
;
3198 register struct window
*ow
;
3201 CHECK_LIVE_WINDOW (window
);
3203 w
= XWINDOW (window
);
3204 w
->frozen_window_start_p
= 0;
3206 ++window_select_count
;
3207 XSETFASTINT (w
->use_time
, window_select_count
);
3208 if (EQ (window
, selected_window
))
3211 /* Store the current buffer's actual point into the
3212 old selected window. It belongs to that window,
3213 and when the window is not selected, must be in the window. */
3214 if (!NILP (selected_window
))
3216 ow
= XWINDOW (selected_window
);
3217 if (! NILP (ow
->buffer
))
3218 set_marker_both (ow
->pointm
, ow
->buffer
,
3219 BUF_PT (XBUFFER (ow
->buffer
)),
3220 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
3223 selected_window
= window
;
3224 sf
= SELECTED_FRAME ();
3225 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
3227 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
3228 /* Use this rather than Fhandle_switch_frame
3229 so that FRAME_FOCUS_FRAME is moved appropriately as we
3230 move around in the state where a minibuffer in a separate
3232 Fselect_frame (WINDOW_FRAME (w
));
3235 sf
->selected_window
= window
;
3237 if (NILP (norecord
))
3238 record_buffer (w
->buffer
);
3239 Fset_buffer (w
->buffer
);
3241 XBUFFER (w
->buffer
)->last_selected_window
= window
;
3243 /* Go to the point recorded in the window.
3244 This is important when the buffer is in more
3245 than one window. It also matters when
3246 redisplay_window has altered point after scrolling,
3247 because it makes the change only in the window. */
3249 register int new_point
= marker_position (w
->pointm
);
3250 if (new_point
< BEGV
)
3252 else if (new_point
> ZV
)
3258 windows_or_buffers_changed
++;
3263 select_window_norecord (window
)
3266 return Fselect_window (window
, Qt
);
3269 /* Deiconify the frame containing the window WINDOW,
3270 unless it is the selected frame;
3273 The reason for the exception for the selected frame
3274 is that it seems better not to change the selected frames visibility
3275 merely because of displaying a different buffer in it.
3276 The deiconification is useful when a buffer gets shown in
3277 another frame that you were not using lately. */
3280 display_buffer_1 (window
)
3283 Lisp_Object frame
= XWINDOW (window
)->frame
;
3284 FRAME_PTR f
= XFRAME (frame
);
3286 FRAME_SAMPLE_VISIBILITY (f
);
3288 if (EQ (frame
, selected_frame
))
3289 ; /* Assume the selected frame is already visible enough. */
3290 else if (minibuf_level
> 0
3291 && MINI_WINDOW_P (XWINDOW (selected_window
))
3292 && WINDOW_LIVE_P (minibuf_selected_window
)
3293 && EQ (frame
, WINDOW_FRAME (XWINDOW (minibuf_selected_window
))))
3294 ; /* Assume the frame from which we invoked the minibuffer is visible. */
3297 if (FRAME_ICONIFIED_P (f
))
3298 Fmake_frame_visible (frame
);
3299 else if (FRAME_VISIBLE_P (f
))
3300 Fraise_frame (frame
);
3306 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
3307 doc
: /* Returns non-nil if a buffer named BUFFER-NAME gets a special frame.
3308 If the value is t, `display-buffer' or `pop-to-buffer' would create a
3309 special frame for that buffer using the default frame parameters.
3311 If the value is a list, it is a list of frame parameters that would be used
3312 to make a frame for that buffer.
3313 The variables `special-display-buffer-names'
3314 and `special-display-regexps' control this. */)
3316 Lisp_Object buffer_name
;
3320 CHECK_STRING (buffer_name
);
3322 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
3326 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
3330 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3332 Lisp_Object car
= XCAR (tem
);
3334 && fast_string_match (car
, buffer_name
) >= 0)
3336 else if (CONSP (car
)
3337 && STRINGP (XCAR (car
))
3338 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3344 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
3345 doc
: /* Returns non-nil if a buffer named BUFFER-NAME would use the same window.
3346 More precisely, if `display-buffer' or `pop-to-buffer' would display
3347 that buffer in the selected window rather than (as usual) in some other window.
3348 See `same-window-buffer-names' and `same-window-regexps'. */)
3350 Lisp_Object buffer_name
;
3354 CHECK_STRING (buffer_name
);
3356 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
3360 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
3364 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3366 Lisp_Object car
= XCAR (tem
);
3368 && fast_string_match (car
, buffer_name
) >= 0)
3370 else if (CONSP (car
)
3371 && STRINGP (XCAR (car
))
3372 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3378 /* Use B so the default is (other-buffer). */
3379 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
3380 "BDisplay buffer: \nP",
3381 doc
: /* Make BUFFER appear in some window but don't select it.
3382 BUFFER must be the name of an existing buffer, or, when called from Lisp,
3384 If BUFFER is shown already in some window, just use that one,
3385 unless the window is the selected window and the optional second
3386 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).
3387 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.
3388 Returns the window displaying BUFFER.
3389 If `display-buffer-reuse-frames' is non-nil, and another frame is currently
3390 displaying BUFFER, then simply raise that frame.
3392 The variables `special-display-buffer-names',
3393 `special-display-regexps', `same-window-buffer-names', and
3394 `same-window-regexps' customize how certain buffer names are handled.
3395 The latter two take effect only if NOT-THIS-WINDOW is t.
3397 If optional argument FRAME is `visible', search all visible frames.
3398 If FRAME is 0, search all visible and iconified frames.
3399 If FRAME is t, search all frames.
3400 If FRAME is a frame, search only that frame.
3401 If FRAME is nil, search only the selected frame
3402 (actually the last nonminibuffer frame),
3403 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,
3404 which means search visible and iconified frames.
3406 If a full-width window on a splittable frame is available to display
3407 the buffer, it may be split, subject to the value of the variable
3408 `split-height-threshold'.
3410 If `even-window-heights' is non-nil, window heights will be evened out
3411 if displaying the buffer causes two vertically adjacent windows to be
3413 (buffer
, not_this_window
, frame
)
3414 register Lisp_Object buffer
, not_this_window
, frame
;
3416 register Lisp_Object window
, tem
, swp
;
3420 buffer
= Fget_buffer (buffer
);
3421 CHECK_BUFFER (buffer
);
3423 if (!NILP (Vdisplay_buffer_function
))
3424 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
3426 if (NILP (not_this_window
)
3427 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
3428 return display_buffer_1 (selected_window
);
3430 /* See if the user has specified this buffer should appear
3431 in the selected window. */
3432 if (NILP (not_this_window
))
3434 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
3435 if (!NILP (swp
) && !no_switch_window (selected_window
))
3437 Fswitch_to_buffer (buffer
, Qnil
);
3438 return display_buffer_1 (selected_window
);
3442 /* If the user wants pop-up-frames or display-buffer-reuse-frames,
3443 look for a window showing BUFFER on any visible or iconified frame.
3444 Otherwise search only the current frame. */
3447 else if (pop_up_frames
3448 || display_buffer_reuse_frames
3449 || last_nonminibuf_frame
== 0)
3450 XSETFASTINT (tem
, 0);
3452 XSETFRAME (tem
, last_nonminibuf_frame
);
3454 window
= Fget_buffer_window (buffer
, tem
);
3456 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
3457 return display_buffer_1 (window
);
3459 /* Certain buffer names get special handling. */
3460 if (!NILP (Vspecial_display_function
) && NILP (swp
))
3462 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
3464 return call1 (Vspecial_display_function
, buffer
);
3466 return call2 (Vspecial_display_function
, buffer
, tem
);
3469 /* If there are no frames open that have more than a minibuffer,
3470 we need to create a new frame. */
3471 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
3473 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3474 Fset_window_buffer (window
, buffer
, Qnil
);
3475 return display_buffer_1 (window
);
3478 f
= SELECTED_FRAME ();
3480 || FRAME_MINIBUF_ONLY_P (f
)
3481 /* If the current frame is a special display frame,
3482 don't try to reuse its windows. */
3483 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
3488 if (FRAME_MINIBUF_ONLY_P (f
))
3489 XSETFRAME (frames
, last_nonminibuf_frame
);
3490 /* Don't try to create a window if we would get an error. */
3491 if (split_height_threshold
< window_min_height
<< 1)
3492 split_height_threshold
= window_min_height
<< 1;
3494 /* Note that both Fget_largest_window and Fget_lru_window
3495 ignore minibuffers and dedicated windows.
3496 This means they can return nil. */
3498 /* If the frame we would try to split cannot be split,
3499 try other frames. */
3500 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
3502 /* Try visible frames first. */
3503 window
= Fget_largest_window (Qvisible
);
3504 /* If that didn't work, try iconified frames. */
3506 window
= Fget_largest_window (make_number (0));
3508 window
= Fget_largest_window (Qt
);
3511 window
= Fget_largest_window (frames
);
3513 /* If we got a tall enough full-width window that can be split,
3516 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3517 && window_height (window
) >= split_height_threshold
3518 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
3519 window
= Fsplit_window (window
, Qnil
, Qnil
);
3522 Lisp_Object upper
, lower
, other
;
3524 window
= Fget_lru_window (frames
);
3525 /* If the LRU window is selected, and big enough,
3526 and can be split, split it. */
3528 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3529 && (EQ (window
, selected_window
)
3530 || EQ (XWINDOW (window
)->parent
, Qnil
))
3531 && window_height (window
) >= window_min_height
<< 1)
3532 window
= Fsplit_window (window
, Qnil
, Qnil
);
3533 /* If Fget_lru_window returned nil, try other approaches. */
3535 /* Try visible frames first. */
3537 window
= Fget_buffer_window (buffer
, Qvisible
);
3539 window
= Fget_largest_window (Qvisible
);
3540 /* If that didn't work, try iconified frames. */
3542 window
= Fget_buffer_window (buffer
, make_number (0));
3544 window
= Fget_largest_window (make_number (0));
3545 /* Try invisible frames. */
3547 window
= Fget_buffer_window (buffer
, Qt
);
3549 window
= Fget_largest_window (Qt
);
3550 /* As a last resort, make a new frame. */
3552 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3553 /* If window appears above or below another,
3554 even out their heights. */
3555 other
= upper
= lower
= Qnil
;
3556 if (!NILP (XWINDOW (window
)->prev
))
3557 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3558 if (!NILP (XWINDOW (window
)->next
))
3559 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3561 && !NILP (Veven_window_heights
)
3562 /* Check that OTHER and WINDOW are vertically arrayed. */
3563 && !EQ (XWINDOW (other
)->top_line
, XWINDOW (window
)->top_line
)
3564 && (XFASTINT (XWINDOW (other
)->total_lines
)
3565 > XFASTINT (XWINDOW (window
)->total_lines
)))
3567 int total
= (XFASTINT (XWINDOW (other
)->total_lines
)
3568 + XFASTINT (XWINDOW (window
)->total_lines
));
3569 enlarge_window (upper
,
3570 total
/ 2 - XFASTINT (XWINDOW (upper
)->total_lines
),
3576 window
= Fget_lru_window (Qnil
);
3578 Fset_window_buffer (window
, buffer
, Qnil
);
3579 return display_buffer_1 (window
);
3583 DEFUN ("force-window-update", Fforce_window_update
, Sforce_window_update
,
3585 doc
: /* Force redisplay of all windows.
3586 If optional arg OBJECT is a window, force redisplay of that window only.
3587 If OBJECT is a buffer or buffer name, force redisplay of all windows
3588 displaying that buffer. */)
3594 windows_or_buffers_changed
++;
3595 update_mode_lines
++;
3599 if (WINDOWP (object
))
3601 struct window
*w
= XWINDOW (object
);
3602 mark_window_display_accurate (object
, 0);
3603 w
->update_mode_line
= Qt
;
3604 if (BUFFERP (w
->buffer
))
3605 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
3606 ++update_mode_lines
;
3610 if (STRINGP (object
))
3611 object
= Fget_buffer (object
);
3612 if (BUFFERP (object
) && !NILP (XBUFFER (object
)->name
))
3614 /* Walk all windows looking for buffer, and force update
3615 of each of those windows. */
3617 object
= window_loop (REDISPLAY_BUFFER_WINDOWS
, object
, 0, Qvisible
);
3618 return NILP (object
) ? Qnil
: Qt
;
3621 /* If nothing suitable was found, just return.
3622 We could signal an error, but this feature will typically be used
3623 asynchronously in timers or process sentinels, so we don't. */
3629 temp_output_buffer_show (buf
)
3630 register Lisp_Object buf
;
3632 register struct buffer
*old
= current_buffer
;
3633 register Lisp_Object window
;
3634 register struct window
*w
;
3636 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3639 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3643 #if 0 /* rms: there should be no reason for this. */
3644 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3646 set_buffer_internal (old
);
3648 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3649 call1 (Vtemp_buffer_show_function
, buf
);
3652 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3654 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3655 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3656 Vminibuf_scroll_window
= window
;
3657 w
= XWINDOW (window
);
3658 XSETFASTINT (w
->hscroll
, 0);
3659 XSETFASTINT (w
->min_hscroll
, 0);
3660 set_marker_restricted_both (w
->start
, buf
, BEG
, BEG
);
3661 set_marker_restricted_both (w
->pointm
, buf
, BEG
, BEG
);
3663 /* Run temp-buffer-show-hook, with the chosen window selected
3664 and its buffer current. */
3666 if (!NILP (Vrun_hooks
)
3667 && !NILP (Fboundp (Qtemp_buffer_show_hook
))
3668 && !NILP (Fsymbol_value (Qtemp_buffer_show_hook
)))
3670 int count
= SPECPDL_INDEX ();
3671 Lisp_Object prev_window
, prev_buffer
;
3672 prev_window
= selected_window
;
3673 XSETBUFFER (prev_buffer
, old
);
3675 /* Select the window that was chosen, for running the hook.
3676 Note: Both Fselect_window and select_window_norecord may
3677 set-buffer to the buffer displayed in the window,
3678 so we need to save the current buffer. --stef */
3679 record_unwind_protect (Fset_buffer
, prev_buffer
);
3680 record_unwind_protect (select_window_norecord
, prev_window
);
3681 Fselect_window (window
, Qt
);
3682 Fset_buffer (w
->buffer
);
3683 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3684 unbind_to (count
, Qnil
);
3690 make_dummy_parent (window
)
3694 register struct window
*o
, *p
;
3697 o
= XWINDOW (window
);
3698 p
= allocate_window ();
3699 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3700 ((struct Lisp_Vector
*) p
)->contents
[i
]
3701 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3702 XSETWINDOW (new, p
);
3705 XSETFASTINT (p
->sequence_number
, sequence_number
);
3707 /* Put new into window structure in place of window */
3708 replace_window (window
, new);
3721 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3722 doc
: /* Split WINDOW, putting SIZE lines in the first of the pair.
3723 WINDOW defaults to selected one and SIZE to half its size.
3724 If optional third arg HORFLAG is non-nil, split side by side
3725 and put SIZE columns in the first of the pair. In that case,
3726 SIZE includes that window's scroll bar, or the divider column to its right.
3727 Interactively, all arguments are nil.
3729 Returns the newly created window (which is the lower or rightmost one).
3730 The upper or leftmost window is the original one and remains selected.
3731 See Info node `(elisp)Splitting Windows' for more details and examples.*/)
3732 (window
, size
, horflag
)
3733 Lisp_Object window
, size
, horflag
;
3735 register Lisp_Object
new;
3736 register struct window
*o
, *p
;
3738 register int size_int
;
3741 window
= selected_window
;
3743 CHECK_LIVE_WINDOW (window
);
3745 o
= XWINDOW (window
);
3746 fo
= XFRAME (WINDOW_FRAME (o
));
3750 if (!NILP (horflag
))
3751 /* Calculate the size of the left-hand window, by dividing
3752 the usable space in columns by two.
3753 We round up, since the left-hand window may include
3754 a dividing line, while the right-hand may not. */
3755 size_int
= (XFASTINT (o
->total_cols
) + 1) >> 1;
3757 size_int
= XFASTINT (o
->total_lines
) >> 1;
3761 CHECK_NUMBER (size
);
3762 size_int
= XINT (size
);
3765 if (MINI_WINDOW_P (o
))
3766 error ("Attempt to split minibuffer window");
3767 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3768 error ("Attempt to split fixed-size window");
3770 check_min_window_sizes ();
3774 if (size_int
< window_min_height
)
3775 error ("Window height %d too small (after splitting)", size_int
);
3776 if (size_int
+ window_min_height
> XFASTINT (o
->total_lines
))
3777 error ("Window height %d too small (after splitting)",
3778 XFASTINT (o
->total_lines
) - size_int
);
3779 if (NILP (o
->parent
)
3780 || NILP (XWINDOW (o
->parent
)->vchild
))
3782 make_dummy_parent (window
);
3784 XWINDOW (new)->vchild
= window
;
3789 if (size_int
< window_min_width
)
3790 error ("Window width %d too small (after splitting)", size_int
);
3792 if (size_int
+ window_min_width
> XFASTINT (o
->total_cols
))
3793 error ("Window width %d too small (after splitting)",
3794 XFASTINT (o
->total_cols
) - size_int
);
3795 if (NILP (o
->parent
)
3796 || NILP (XWINDOW (o
->parent
)->hchild
))
3798 make_dummy_parent (window
);
3800 XWINDOW (new)->hchild
= window
;
3804 /* Now we know that window's parent is a vertical combination
3805 if we are dividing vertically, or a horizontal combination
3806 if we are making side-by-side windows */
3808 windows_or_buffers_changed
++;
3809 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3810 new = make_window ();
3813 p
->frame
= o
->frame
;
3815 if (!NILP (p
->next
))
3816 XWINDOW (p
->next
)->prev
= new;
3819 p
->parent
= o
->parent
;
3821 p
->window_end_valid
= Qnil
;
3822 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3824 /* Duplicate special geometry settings. */
3826 p
->left_margin_cols
= o
->left_margin_cols
;
3827 p
->right_margin_cols
= o
->right_margin_cols
;
3828 p
->left_fringe_width
= o
->left_fringe_width
;
3829 p
->right_fringe_width
= o
->right_fringe_width
;
3830 p
->fringes_outside_margins
= o
->fringes_outside_margins
;
3831 p
->scroll_bar_width
= o
->scroll_bar_width
;
3832 p
->vertical_scroll_bar_type
= o
->vertical_scroll_bar_type
;
3834 /* Apportion the available frame space among the two new windows */
3836 if (!NILP (horflag
))
3838 p
->total_lines
= o
->total_lines
;
3839 p
->top_line
= o
->top_line
;
3840 XSETFASTINT (p
->total_cols
, XFASTINT (o
->total_cols
) - size_int
);
3841 XSETFASTINT (o
->total_cols
, size_int
);
3842 XSETFASTINT (p
->left_col
, XFASTINT (o
->left_col
) + size_int
);
3843 adjust_window_margins (p
);
3844 adjust_window_margins (o
);
3848 p
->left_col
= o
->left_col
;
3849 p
->total_cols
= o
->total_cols
;
3850 XSETFASTINT (p
->total_lines
, XFASTINT (o
->total_lines
) - size_int
);
3851 XSETFASTINT (o
->total_lines
, size_int
);
3852 XSETFASTINT (p
->top_line
, XFASTINT (o
->top_line
) + size_int
);
3855 /* Adjust glyph matrices. */
3858 Fset_window_buffer (new, o
->buffer
, Qt
);
3862 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 3, "p",
3863 doc
: /* Make current window ARG lines bigger.
3864 From program, optional second arg non-nil means grow sideways ARG columns.
3865 Interactively, if an argument is not given, make the window one line bigger.
3867 Optional third arg PRESERVE-BEFORE, if non-nil, means do not change the size
3868 of the siblings above or to the left of the selected window. Only
3869 siblings to the right or below are changed. */)
3870 (arg
, side
, preserve_before
)
3871 register Lisp_Object arg
, side
, preserve_before
;
3874 enlarge_window (selected_window
, XINT (arg
), !NILP (side
),
3875 !NILP (preserve_before
));
3877 if (! NILP (Vwindow_configuration_change_hook
))
3878 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3883 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 3, "p",
3884 doc
: /* Make current window ARG lines smaller.
3885 From program, optional second arg non-nil means shrink sideways arg columns.
3886 Interactively, if an argument is not given, make the window one line smaller.
3888 Optional third arg PRESERVE-BEFORE, if non-nil, means do not change the size
3889 of the siblings above or to the left of the selected window. Only
3890 siblings to the right or below are changed. */)
3891 (arg
, side
, preserve_before
)
3892 register Lisp_Object arg
, side
, preserve_before
;
3895 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
),
3896 !NILP (preserve_before
));
3898 if (! NILP (Vwindow_configuration_change_hook
))
3899 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3905 window_height (window
)
3908 register struct window
*p
= XWINDOW (window
);
3909 return WINDOW_TOTAL_LINES (p
);
3913 window_width (window
)
3916 register struct window
*p
= XWINDOW (window
);
3917 return WINDOW_TOTAL_COLS (p
);
3922 *(widthflag ? &(XWINDOW (w)->left_col) : &(XWINDOW (w)->top_line))
3924 #define CURSIZE(w) \
3925 *(widthflag ? &(XWINDOW (w)->total_cols) : &(XWINDOW (w)->total_lines))
3928 /* Enlarge WINDOW by DELTA. WIDTHFLAG non-zero means
3929 increase its width. Siblings of the selected window are resized to
3930 fulfill the size request. If they become too small in the process,
3931 they will be deleted.
3933 If PRESERVE_BEFORE is nonzero, that means don't alter
3934 the siblings to the left or above WINDOW. */
3937 enlarge_window (window
, delta
, widthflag
, preserve_before
)
3939 int delta
, widthflag
, preserve_before
;
3941 Lisp_Object parent
, next
, prev
;
3945 int (*sizefun
) P_ ((Lisp_Object
))
3946 = widthflag
? window_width
: window_height
;
3947 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3948 = (widthflag
? set_window_width
: set_window_height
);
3950 /* Check values of window_min_width and window_min_height for
3952 check_min_window_sizes ();
3954 /* Give up if this window cannot be resized. */
3955 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3956 error ("Window is not resizable");
3958 /* Find the parent of the selected window. */
3961 p
= XWINDOW (window
);
3967 error ("No other window to side of this one");
3972 ? !NILP (XWINDOW (parent
)->hchild
)
3973 : !NILP (XWINDOW (parent
)->vchild
))
3979 sizep
= &CURSIZE (window
);
3982 register int maxdelta
;
3984 /* Compute the maximum size increment this window can have. */
3986 if (preserve_before
)
3990 maxdelta
= (*sizefun
) (parent
) - XINT (*sizep
);
3991 /* Subtract size of siblings before, since we can't take that. */
3992 maxdelta
-= XINT (CURBEG (window
)) - XINT (CURBEG (parent
));
3995 maxdelta
= (!NILP (p
->next
) ? ((*sizefun
) (p
->next
)
3996 - window_min_size (XWINDOW (p
->next
),
4001 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
4002 /* This is a main window followed by a minibuffer. */
4003 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
4004 - window_min_size (XWINDOW (p
->next
),
4006 /* This is a minibuffer following a main window. */
4007 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
4008 - window_min_size (XWINDOW (p
->prev
),
4010 /* This is a frame with only one window, a minibuffer-only
4011 or a minibufferless frame. */
4014 if (delta
> maxdelta
)
4015 /* This case traps trying to make the minibuffer
4016 the full frame, or make the only window aside from the
4017 minibuffer the full frame. */
4021 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
4023 delete_window (window
);
4030 /* Find the total we can get from other siblings without deleting them. */
4032 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
4033 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
4035 if (! preserve_before
)
4036 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
4037 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
4040 /* If we can get it all from them without deleting them, do so. */
4041 if (delta
<= maximum
)
4043 Lisp_Object first_unaffected
;
4044 Lisp_Object first_affected
;
4049 first_affected
= window
;
4050 /* Look at one sibling at a time,
4051 moving away from this window in both directions alternately,
4052 and take as much as we can get without deleting that sibling. */
4054 && (!NILP (next
) || (!preserve_before
&& !NILP (prev
))))
4058 int this_one
= ((*sizefun
) (next
)
4059 - window_min_size (XWINDOW (next
),
4060 widthflag
, 0, &fixed_p
));
4063 if (this_one
> delta
)
4066 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
4067 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4072 next
= XWINDOW (next
)->next
;
4078 if (!preserve_before
&& ! NILP (prev
))
4080 int this_one
= ((*sizefun
) (prev
)
4081 - window_min_size (XWINDOW (prev
),
4082 widthflag
, 0, &fixed_p
));
4085 if (this_one
> delta
)
4088 first_affected
= prev
;
4090 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
4091 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4096 prev
= XWINDOW (prev
)->prev
;
4100 xassert (delta
== 0);
4102 /* Now recalculate the edge positions of all the windows affected,
4103 based on the new sizes. */
4104 first_unaffected
= next
;
4105 prev
= first_affected
;
4106 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
4107 prev
= next
, next
= XWINDOW (next
)->next
)
4109 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
4110 /* This does not change size of NEXT,
4111 but it propagates the new top edge to its children */
4112 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
4117 register int delta1
;
4118 register int opht
= (*sizefun
) (parent
);
4120 if (opht
<= XINT (*sizep
) + delta
)
4122 /* If trying to grow this window to or beyond size of the parent,
4123 just delete all the sibling windows. */
4124 Lisp_Object start
, tem
, next
;
4126 start
= XWINDOW (parent
)->vchild
;
4128 start
= XWINDOW (parent
)->hchild
;
4130 /* Delete any siblings that come after WINDOW. */
4131 tem
= XWINDOW (window
)->next
;
4132 while (! NILP (tem
))
4134 next
= XWINDOW (tem
)->next
;
4135 delete_window (tem
);
4139 /* Delete any siblings that come after WINDOW.
4140 Note that if START is not WINDOW, then WINDOW still
4141 Fhas siblings, so WINDOW has not yet replaced its parent. */
4143 while (! EQ (tem
, window
))
4145 next
= XWINDOW (tem
)->next
;
4146 delete_window (tem
);
4152 /* Otherwise, make delta1 just right so that if we add
4153 delta1 lines to this window and to the parent, and then
4154 shrink the parent back to its original size, the new
4155 proportional size of this window will increase by delta.
4157 The function size_window will compute the new height h'
4158 of the window from delta1 as:
4161 x = delta1 - delta1/n * n for the 1st resizable child
4164 where n is the number of children that can be resized.
4165 We can ignore x by choosing a delta1 that is a multiple of
4166 n. We want the height of this window to come out as
4176 The number of children n equals the number of resizable
4177 children of this window + 1 because we know window itself
4178 is resizable (otherwise we would have signalled an error). */
4180 struct window
*w
= XWINDOW (window
);
4184 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
4185 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
4187 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
4188 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
4193 /* Add delta1 lines or columns to this window, and to the parent,
4194 keeping things consistent while not affecting siblings. */
4195 XSETINT (CURSIZE (parent
), opht
+ delta1
);
4196 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
4198 /* Squeeze out delta1 lines or columns from our parent,
4199 shriking this window and siblings proportionately.
4200 This brings parent back to correct size.
4201 Delta1 was calculated so this makes this window the desired size,
4202 taking it all out of the siblings. */
4203 (*setsizefun
) (parent
, opht
, 0);
4208 XSETFASTINT (p
->last_modified
, 0);
4209 XSETFASTINT (p
->last_overlay_modified
, 0);
4211 /* Adjust glyph matrices. */
4212 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4220 /***********************************************************************
4221 Resizing Mini-Windows
4222 ***********************************************************************/
4224 static void shrink_window_lowest_first
P_ ((struct window
*, int));
4226 enum save_restore_action
4233 static int save_restore_orig_size
P_ ((struct window
*,
4234 enum save_restore_action
));
4236 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
4237 from lowest windows first. */
4240 shrink_window_lowest_first (w
, height
)
4248 xassert (!MINI_WINDOW_P (w
));
4250 /* Set redisplay hints. */
4251 XSETFASTINT (w
->last_modified
, 0);
4252 XSETFASTINT (w
->last_overlay_modified
, 0);
4253 windows_or_buffers_changed
++;
4254 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
4256 old_height
= XFASTINT (w
->total_lines
);
4257 XSETFASTINT (w
->total_lines
, height
);
4259 if (!NILP (w
->hchild
))
4261 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
4263 c
= XWINDOW (child
);
4264 c
->top_line
= w
->top_line
;
4265 shrink_window_lowest_first (c
, height
);
4268 else if (!NILP (w
->vchild
))
4270 Lisp_Object last_child
;
4271 int delta
= old_height
- height
;
4276 /* Find the last child. We are taking space from lowest windows
4277 first, so we iterate over children from the last child
4279 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
4282 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
4283 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
4287 c
= XWINDOW (child
);
4288 this_one
= XFASTINT (c
->total_lines
) - MIN_SAFE_WINDOW_HEIGHT
;
4290 if (this_one
> delta
)
4293 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
) - this_one
);
4297 /* Compute new positions. */
4298 last_top
= XINT (w
->top_line
);
4299 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
4301 c
= XWINDOW (child
);
4302 c
->top_line
= make_number (last_top
);
4303 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
));
4304 last_top
+= XFASTINT (c
->total_lines
);
4310 /* Save, restore, or check positions and sizes in the window tree
4311 rooted at W. ACTION says what to do.
4313 If ACTION is CHECK_ORIG_SIZES, check if orig_top_line and
4314 orig_total_lines members are valid for all windows in the window
4315 tree. Value is non-zero if they are valid.
4317 If ACTION is SAVE_ORIG_SIZES, save members top and height in
4318 orig_top_line and orig_total_lines for all windows in the tree.
4320 If ACTION is RESTORE_ORIG_SIZES, restore top and height from values
4321 stored in orig_top_line and orig_total_lines for all windows. */
4324 save_restore_orig_size (w
, action
)
4326 enum save_restore_action action
;
4332 if (!NILP (w
->hchild
))
4334 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
4337 else if (!NILP (w
->vchild
))
4339 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
4345 case CHECK_ORIG_SIZES
:
4346 if (!INTEGERP (w
->orig_top_line
) || !INTEGERP (w
->orig_total_lines
))
4350 case SAVE_ORIG_SIZES
:
4351 w
->orig_top_line
= w
->top_line
;
4352 w
->orig_total_lines
= w
->total_lines
;
4353 XSETFASTINT (w
->last_modified
, 0);
4354 XSETFASTINT (w
->last_overlay_modified
, 0);
4357 case RESTORE_ORIG_SIZES
:
4358 xassert (INTEGERP (w
->orig_top_line
) && INTEGERP (w
->orig_total_lines
));
4359 w
->top_line
= w
->orig_top_line
;
4360 w
->total_lines
= w
->orig_total_lines
;
4361 w
->orig_total_lines
= w
->orig_top_line
= Qnil
;
4362 XSETFASTINT (w
->last_modified
, 0);
4363 XSETFASTINT (w
->last_overlay_modified
, 0);
4370 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
4377 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
4378 without deleting other windows. */
4381 grow_mini_window (w
, delta
)
4385 struct frame
*f
= XFRAME (w
->frame
);
4386 struct window
*root
;
4388 xassert (MINI_WINDOW_P (w
));
4389 xassert (delta
>= 0);
4391 /* Check values of window_min_width and window_min_height for
4393 check_min_window_sizes ();
4395 /* Compute how much we can enlarge the mini-window without deleting
4397 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4400 int min_height
= window_min_size (root
, 0, 0, 0);
4401 if (XFASTINT (root
->total_lines
) - delta
< min_height
)
4402 /* Note that the root window may already be smaller than
4404 delta
= max (0, XFASTINT (root
->total_lines
) - min_height
);
4409 /* Save original window sizes and positions, if not already done. */
4410 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4411 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
4413 /* Shrink other windows. */
4414 shrink_window_lowest_first (root
, XFASTINT (root
->total_lines
) - delta
);
4416 /* Grow the mini-window. */
4417 w
->top_line
= make_number (XFASTINT (root
->top_line
) + XFASTINT (root
->total_lines
));
4418 w
->total_lines
= make_number (XFASTINT (w
->total_lines
) + delta
);
4419 XSETFASTINT (w
->last_modified
, 0);
4420 XSETFASTINT (w
->last_overlay_modified
, 0);
4427 /* Shrink mini-window W. If there is recorded info about window sizes
4428 before a call to grow_mini_window, restore recorded window sizes.
4429 Otherwise, if the mini-window is higher than 1 line, resize it to 1
4433 shrink_mini_window (w
)
4436 struct frame
*f
= XFRAME (w
->frame
);
4437 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4439 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4441 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
4443 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4444 windows_or_buffers_changed
= 1;
4446 else if (XFASTINT (w
->total_lines
) > 1)
4448 /* Distribute the additional lines of the mini-window
4449 among the other windows. */
4451 XSETWINDOW (window
, w
);
4452 enlarge_window (window
, 1 - XFASTINT (w
->total_lines
), 0, 0);
4458 /* Mark window cursors off for all windows in the window tree rooted
4459 at W by setting their phys_cursor_on_p flag to zero. Called from
4460 xterm.c, e.g. when a frame is cleared and thereby all cursors on
4461 the frame are cleared. */
4464 mark_window_cursors_off (w
)
4469 if (!NILP (w
->hchild
))
4470 mark_window_cursors_off (XWINDOW (w
->hchild
));
4471 else if (!NILP (w
->vchild
))
4472 mark_window_cursors_off (XWINDOW (w
->vchild
));
4474 w
->phys_cursor_on_p
= 0;
4476 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4481 /* Return number of lines of text (not counting mode lines) in W. */
4484 window_internal_height (w
)
4487 int ht
= XFASTINT (w
->total_lines
);
4489 if (!MINI_WINDOW_P (w
))
4491 if (!NILP (w
->parent
)
4492 || !NILP (w
->vchild
)
4493 || !NILP (w
->hchild
)
4496 || WINDOW_WANTS_MODELINE_P (w
))
4499 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4507 /* Return the number of columns in W.
4508 Don't count columns occupied by scroll bars or the vertical bar
4509 separating W from the sibling to its right. */
4512 window_box_text_cols (w
)
4515 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4516 int width
= XINT (w
->total_cols
);
4518 if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w
))
4519 /* Scroll bars occupy a few columns. */
4520 width
-= WINDOW_CONFIG_SCROLL_BAR_COLS (w
);
4521 else if (!FRAME_WINDOW_P (f
)
4522 && !WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
4523 /* The column of `|' characters separating side-by-side windows
4524 occupies one column only. */
4527 if (FRAME_WINDOW_P (f
))
4528 /* On window-systems, fringes and display margins cannot be
4529 used for normal text. */
4530 width
-= (WINDOW_FRINGE_COLS (w
)
4531 + WINDOW_LEFT_MARGIN_COLS (w
)
4532 + WINDOW_RIGHT_MARGIN_COLS (w
));
4538 /************************************************************************
4540 ***********************************************************************/
4542 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
4543 N screen-fulls, which is defined as the height of the window minus
4544 next_screen_context_lines. If WHOLE is zero, scroll up N lines
4545 instead. Negative values of N mean scroll down. NOERROR non-zero
4546 means don't signal an error if we try to move over BEGV or ZV,
4550 window_scroll (window
, n
, whole
, noerror
)
4558 /* If we must, use the pixel-based version which is much slower than
4559 the line-based one but can handle varying line heights. */
4560 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
4561 window_scroll_pixel_based (window
, n
, whole
, noerror
);
4563 window_scroll_line_based (window
, n
, whole
, noerror
);
4569 /* Implementation of window_scroll that works based on pixel line
4570 heights. See the comment of window_scroll for parameter
4574 window_scroll_pixel_based (window
, n
, whole
, noerror
)
4581 struct window
*w
= XWINDOW (window
);
4582 struct text_pos start
;
4584 int this_scroll_margin
;
4586 /* True if we fiddled the window vscroll field without really scrolling. */
4589 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4591 /* If PT is not visible in WINDOW, move back one half of
4592 the screen. Allow PT to be partially visible, otherwise
4593 something like (scroll-down 1) with PT in the line before
4594 the partially visible one would recenter. */
4595 tem
= Fpos_visible_in_window_p (make_number (PT
), window
, Qt
);
4598 /* Move backward half the height of the window. Performance note:
4599 vmotion used here is about 10% faster, but would give wrong
4600 results for variable height lines. */
4601 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4602 it
.current_y
= it
.last_visible_y
;
4603 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
4605 /* The function move_iterator_vertically may move over more than
4606 the specified y-distance. If it->w is small, e.g. a
4607 mini-buffer window, we may end up in front of the window's
4608 display area. This is the case when Start displaying at the
4609 start of the line containing PT in this case. */
4610 if (it
.current_y
<= 0)
4612 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4613 move_it_vertically_backward (&it
, 0);
4617 start
= it
.current
.pos
;
4619 else if (auto_window_vscroll_p
)
4621 if (tem
= XCAR (XCDR (XCDR (tem
))), CONSP (tem
))
4624 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4626 dy
= max ((window_box_height (w
)
4627 - next_screen_context_lines
* dy
),
4631 if (n
< 0 && (px
= XINT (XCAR (tem
))) > 0)
4633 px
= max (0, -w
->vscroll
- min (px
, -dy
));
4634 Fset_window_vscroll (window
, make_number (px
), Qt
);
4637 if (n
> 0 && (px
= XINT (XCDR (tem
))) > 0)
4639 px
= max (0, -w
->vscroll
+ min (px
, dy
));
4640 Fset_window_vscroll (window
, make_number (px
), Qt
);
4644 Fset_window_vscroll (window
, make_number (0), Qt
);
4647 /* If scroll_preserve_screen_position is non-nil, we try to set
4648 point in the same window line as it is now, so get that line. */
4649 if (!NILP (Vscroll_preserve_screen_position
))
4651 start_display (&it
, w
, start
);
4652 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4653 preserve_y
= it
.current_y
;
4658 /* Move iterator it from start the specified distance forward or
4659 backward. The result is the new window start. */
4660 start_display (&it
, w
, start
);
4663 int start_pos
= IT_CHARPOS (it
);
4664 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4665 dy
= max ((window_box_height (w
)
4666 - next_screen_context_lines
* dy
),
4669 /* Note that move_it_vertically always moves the iterator to the
4670 start of a line. So, if the last line doesn't have a newline,
4671 we would end up at the start of the line ending at ZV. */
4674 move_it_vertically_backward (&it
, -dy
);
4675 /* Ensure we actually does move, e.g. in case we are currently
4676 looking at an image that is taller that the window height. */
4677 while (start_pos
== IT_CHARPOS (it
)
4678 && start_pos
> BEGV
)
4679 move_it_by_lines (&it
, -1, 1);
4683 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
4684 MOVE_TO_POS
| MOVE_TO_Y
);
4685 /* Ensure we actually does move, e.g. in case we are currently
4686 looking at an image that is taller that the window height. */
4687 while (start_pos
== IT_CHARPOS (it
)
4689 move_it_by_lines (&it
, 1, 1);
4693 move_it_by_lines (&it
, n
, 1);
4695 /* We failed if we find ZV is already on the screen (scrolling up,
4696 means there's nothing past the end), or if we can't start any
4697 earlier (scrolling down, means there's nothing past the top). */
4698 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
4699 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
4701 if (IT_CHARPOS (it
) == ZV
)
4703 if (it
.current_y
< it
.last_visible_y
4704 && (it
.current_y
+ it
.max_ascent
+ it
.max_descent
4705 >= it
.last_visible_y
))
4707 /* The last line was only partially visible, make it fully
4709 w
->vscroll
= (it
.last_visible_y
4710 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4711 adjust_glyphs (it
.f
);
4716 Fsignal (Qend_of_buffer
, Qnil
);
4720 if (w
->vscroll
!= 0)
4721 /* The first line was only partially visible, make it fully
4727 Fsignal (Qbeginning_of_buffer
, Qnil
);
4730 /* If control gets here, then we vscrolled. */
4732 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4734 /* Don't try to change the window start below. */
4740 int pos
= IT_CHARPOS (it
);
4743 /* If in the middle of a multi-glyph character move forward to
4744 the next character. */
4745 if (in_display_vector_p (&it
))
4748 move_it_to (&it
, pos
, -1, -1, -1, MOVE_TO_POS
);
4751 /* Set the window start, and set up the window for redisplay. */
4752 set_marker_restricted (w
->start
, make_number (pos
),
4754 bytepos
= XMARKER (w
->start
)->bytepos
;
4755 w
->start_at_line_beg
= ((pos
== BEGV
|| FETCH_BYTE (bytepos
- 1) == '\n')
4757 w
->update_mode_line
= Qt
;
4758 XSETFASTINT (w
->last_modified
, 0);
4759 XSETFASTINT (w
->last_overlay_modified
, 0);
4760 /* Set force_start so that redisplay_window will run the
4761 window-scroll-functions. */
4762 w
->force_start
= Qt
;
4765 /* The rest of this function uses current_y in a nonstandard way,
4766 not including the height of the header line if any. */
4767 it
.current_y
= it
.vpos
= 0;
4769 /* Move PT out of scroll margins.
4770 This code wants current_y to be zero at the window start position
4771 even if there is a header line. */
4772 this_scroll_margin
= max (0, scroll_margin
);
4773 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->total_lines
) / 4);
4774 this_scroll_margin
*= FRAME_LINE_HEIGHT (it
.f
);
4778 /* We moved the window start towards ZV, so PT may be now
4779 in the scroll margin at the top. */
4780 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4781 if (IT_CHARPOS (it
) == PT
&& it
.current_y
>= this_scroll_margin
4782 && (NILP (Vscroll_preserve_screen_position
)
4783 || EQ (Vscroll_preserve_screen_position
, Qt
)))
4784 /* We found PT at a legitimate height. Leave it alone. */
4786 else if (preserve_y
>= 0)
4788 /* If we have a header line, take account of it.
4789 This is necessary because we set it.current_y to 0, above. */
4790 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4791 preserve_y
-= CURRENT_HEADER_LINE_HEIGHT (w
);
4793 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4794 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4798 while (it
.current_y
< this_scroll_margin
)
4800 int prev
= it
.current_y
;
4801 move_it_by_lines (&it
, 1, 1);
4802 if (prev
== it
.current_y
)
4805 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4810 int charpos
, bytepos
;
4813 /* Save our position, for the preserve_y case. */
4814 charpos
= IT_CHARPOS (it
);
4815 bytepos
= IT_BYTEPOS (it
);
4817 /* We moved the window start towards BEGV, so PT may be now
4818 in the scroll margin at the bottom. */
4819 move_it_to (&it
, PT
, -1,
4820 (it
.last_visible_y
- CURRENT_HEADER_LINE_HEIGHT (w
)
4821 - this_scroll_margin
- 1),
4823 MOVE_TO_POS
| MOVE_TO_Y
);
4825 /* Save our position, in case it's correct. */
4826 charpos
= IT_CHARPOS (it
);
4827 bytepos
= IT_BYTEPOS (it
);
4829 /* See if point is on a partially visible line at the end. */
4830 if (it
.what
== IT_EOB
)
4831 partial_p
= it
.current_y
+ it
.ascent
+ it
.descent
> it
.last_visible_y
;
4834 move_it_by_lines (&it
, 1, 1);
4835 partial_p
= it
.current_y
> it
.last_visible_y
;
4838 if (charpos
== PT
&& !partial_p
4839 && (NILP (Vscroll_preserve_screen_position
)
4840 || EQ (Vscroll_preserve_screen_position
, Qt
)))
4841 /* We found PT before we found the display margin, so PT is ok. */
4843 else if (preserve_y
>= 0)
4845 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4846 start_display (&it
, w
, start
);
4847 #if 0 /* It's wrong to subtract this here
4848 because we called start_display again
4849 and did not alter it.current_y this time. */
4851 /* If we have a header line, take account of it. */
4852 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4853 preserve_y
-= CURRENT_HEADER_LINE_HEIGHT (w
);
4856 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4857 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4862 /* The last line was only partially visible, so back up two
4863 lines to make sure we're on a fully visible line. */
4865 move_it_by_lines (&it
, -2, 0);
4866 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4869 /* No, the position we saved is OK, so use it. */
4870 SET_PT_BOTH (charpos
, bytepos
);
4876 /* Implementation of window_scroll that works based on screen lines.
4877 See the comment of window_scroll for parameter descriptions. */
4880 window_scroll_line_based (window
, n
, whole
, noerror
)
4886 register struct window
*w
= XWINDOW (window
);
4887 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4888 register int pos
, pos_byte
;
4889 register int ht
= window_internal_height (w
);
4890 register Lisp_Object tem
;
4894 struct position posit
;
4897 /* If scrolling screen-fulls, compute the number of lines to
4898 scroll from the window's height. */
4900 n
*= max (1, ht
- next_screen_context_lines
);
4902 startpos
= marker_position (w
->start
);
4904 posit
= *compute_motion (startpos
, 0, 0, 0,
4906 -1, XINT (w
->hscroll
),
4908 original_vpos
= posit
.vpos
;
4910 XSETFASTINT (tem
, PT
);
4911 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4915 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4920 lose
= n
< 0 && PT
== BEGV
;
4921 Fvertical_motion (make_number (n
), window
);
4925 SET_PT_BOTH (opoint
, opoint_byte
);
4932 Fsignal (Qbeginning_of_buffer
, Qnil
);
4937 int this_scroll_margin
= scroll_margin
;
4939 /* Don't use a scroll margin that is negative or too large. */
4940 if (this_scroll_margin
< 0)
4941 this_scroll_margin
= 0;
4943 if (XINT (w
->total_lines
) < 4 * scroll_margin
)
4944 this_scroll_margin
= XINT (w
->total_lines
) / 4;
4946 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4947 w
->start_at_line_beg
= bolp
;
4948 w
->update_mode_line
= Qt
;
4949 XSETFASTINT (w
->last_modified
, 0);
4950 XSETFASTINT (w
->last_overlay_modified
, 0);
4951 /* Set force_start so that redisplay_window will run
4952 the window-scroll-functions. */
4953 w
->force_start
= Qt
;
4955 if (!NILP (Vscroll_preserve_screen_position
)
4956 && (whole
|| !EQ (Vscroll_preserve_screen_position
, Qt
)))
4958 SET_PT_BOTH (pos
, pos_byte
);
4959 Fvertical_motion (make_number (original_vpos
), window
);
4961 /* If we scrolled forward, put point enough lines down
4962 that it is outside the scroll margin. */
4967 if (this_scroll_margin
> 0)
4969 SET_PT_BOTH (pos
, pos_byte
);
4970 Fvertical_motion (make_number (this_scroll_margin
), window
);
4976 if (top_margin
<= opoint
)
4977 SET_PT_BOTH (opoint
, opoint_byte
);
4978 else if (!NILP (Vscroll_preserve_screen_position
))
4980 SET_PT_BOTH (pos
, pos_byte
);
4981 Fvertical_motion (make_number (original_vpos
), window
);
4984 SET_PT (top_margin
);
4990 /* If we scrolled backward, put point near the end of the window
4991 but not within the scroll margin. */
4992 SET_PT_BOTH (pos
, pos_byte
);
4993 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4994 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4997 bottom_margin
= PT
+ 1;
4999 if (bottom_margin
> opoint
)
5000 SET_PT_BOTH (opoint
, opoint_byte
);
5003 if (!NILP (Vscroll_preserve_screen_position
))
5005 SET_PT_BOTH (pos
, pos_byte
);
5006 Fvertical_motion (make_number (original_vpos
), window
);
5009 Fvertical_motion (make_number (-1), window
);
5018 Fsignal (Qend_of_buffer
, Qnil
);
5023 /* Scroll selected_window up or down. If N is nil, scroll a
5024 screen-full which is defined as the height of the window minus
5025 next_screen_context_lines. If N is the symbol `-', scroll.
5026 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
5027 up. This is the guts of Fscroll_up and Fscroll_down. */
5030 scroll_command (n
, direction
)
5034 int count
= SPECPDL_INDEX ();
5036 xassert (abs (direction
) == 1);
5038 /* If selected window's buffer isn't current, make it current for
5039 the moment. But don't screw up if window_scroll gets an error. */
5040 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
5042 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5043 Fset_buffer (XWINDOW (selected_window
)->buffer
);
5045 /* Make redisplay consider other windows than just selected_window. */
5046 ++windows_or_buffers_changed
;
5050 window_scroll (selected_window
, direction
, 1, 0);
5051 else if (EQ (n
, Qminus
))
5052 window_scroll (selected_window
, -direction
, 1, 0);
5055 n
= Fprefix_numeric_value (n
);
5056 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
5059 unbind_to (count
, Qnil
);
5062 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
5063 doc
: /* Scroll text of current window upward ARG lines.
5064 If ARG is omitted or nil, scroll upward by a near full screen.
5065 A near full screen is `next-screen-context-lines' less than a full screen.
5066 Negative ARG means scroll downward.
5067 If ARG is the atom `-', scroll downward by nearly full screen.
5068 When calling from a program, supply as argument a number, nil, or `-'. */)
5072 scroll_command (arg
, 1);
5076 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
5077 doc
: /* Scroll text of current window down ARG lines.
5078 If ARG is omitted or nil, scroll down by a near full screen.
5079 A near full screen is `next-screen-context-lines' less than a full screen.
5080 Negative ARG means scroll upward.
5081 If ARG is the atom `-', scroll upward by nearly full screen.
5082 When calling from a program, supply as argument a number, nil, or `-'. */)
5086 scroll_command (arg
, -1);
5090 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
5091 doc
: /* Return the other window for \"other window scroll\" commands.
5092 If `other-window-scroll-buffer' is non-nil, a window
5093 showing that buffer is used.
5094 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5095 specifies the window. This takes precedence over
5096 `other-window-scroll-buffer'. */)
5101 if (MINI_WINDOW_P (XWINDOW (selected_window
))
5102 && !NILP (Vminibuf_scroll_window
))
5103 window
= Vminibuf_scroll_window
;
5104 /* If buffer is specified, scroll that buffer. */
5105 else if (!NILP (Vother_window_scroll_buffer
))
5107 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
5109 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
5113 /* Nothing specified; look for a neighboring window on the same
5115 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
5117 if (EQ (window
, selected_window
))
5118 /* That didn't get us anywhere; look for a window on another
5121 window
= Fnext_window (window
, Qnil
, Qt
);
5122 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
5123 && ! EQ (window
, selected_window
));
5126 CHECK_LIVE_WINDOW (window
);
5128 if (EQ (window
, selected_window
))
5129 error ("There is no other window");
5134 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
5135 doc
: /* Scroll next window upward ARG lines; or near full screen if no ARG.
5136 A near full screen is `next-screen-context-lines' less than a full screen.
5137 The next window is the one below the current one; or the one at the top
5138 if the current one is at the bottom. Negative ARG means scroll downward.
5139 If ARG is the atom `-', scroll downward by nearly full screen.
5140 When calling from a program, supply as argument a number, nil, or `-'.
5142 If `other-window-scroll-buffer' is non-nil, scroll the window
5143 showing that buffer, popping the buffer up if necessary.
5144 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5145 specifies the window to scroll. This takes precedence over
5146 `other-window-scroll-buffer'. */)
5152 int count
= SPECPDL_INDEX ();
5154 window
= Fother_window_for_scrolling ();
5155 w
= XWINDOW (window
);
5157 /* Don't screw up if window_scroll gets an error. */
5158 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5159 ++windows_or_buffers_changed
;
5161 Fset_buffer (w
->buffer
);
5162 SET_PT (marker_position (w
->pointm
));
5165 window_scroll (window
, 1, 1, 1);
5166 else if (EQ (arg
, Qminus
))
5167 window_scroll (window
, -1, 1, 1);
5173 window_scroll (window
, XINT (arg
), 0, 1);
5176 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
5177 unbind_to (count
, Qnil
);
5182 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 2, "P\np",
5183 doc
: /* Scroll selected window display ARG columns left.
5184 Default for ARG is window width minus 2.
5185 Value is the total amount of leftward horizontal scrolling in
5186 effect after the change.
5187 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5188 lower bound for automatic scrolling, i.e. automatic scrolling
5189 will not scroll a window to a column less than the value returned
5190 by this function. This happens in an interactive call. */)
5192 register Lisp_Object arg
, set_minimum
;
5196 struct window
*w
= XWINDOW (selected_window
);
5199 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5201 arg
= Fprefix_numeric_value (arg
);
5203 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
5204 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5206 if (!NILP (set_minimum
))
5207 w
->min_hscroll
= w
->hscroll
;
5212 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 2, "P\np",
5213 doc
: /* Scroll selected window display ARG columns right.
5214 Default for ARG is window width minus 2.
5215 Value is the total amount of leftward horizontal scrolling in
5216 effect after the change.
5217 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5218 lower bound for automatic scrolling, i.e. automatic scrolling
5219 will not scroll a window to a column less than the value returned
5220 by this function. This happens in an interactive call. */)
5222 register Lisp_Object arg
, set_minimum
;
5226 struct window
*w
= XWINDOW (selected_window
);
5229 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5231 arg
= Fprefix_numeric_value (arg
);
5233 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
5234 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5236 if (!NILP (set_minimum
))
5237 w
->min_hscroll
= w
->hscroll
;
5242 DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window
, Sminibuffer_selected_window
, 0, 0, 0,
5243 doc
: /* Return the window which was selected when entering the minibuffer.
5244 Returns nil, if current window is not a minibuffer window. */)
5247 if (minibuf_level
> 0
5248 && MINI_WINDOW_P (XWINDOW (selected_window
))
5249 && WINDOW_LIVE_P (minibuf_selected_window
))
5250 return minibuf_selected_window
;
5255 /* Value is the number of lines actually displayed in window W,
5256 as opposed to its height. */
5259 displayed_window_lines (w
)
5263 struct text_pos start
;
5264 int height
= window_box_height (w
);
5265 struct buffer
*old_buffer
;
5268 if (XBUFFER (w
->buffer
) != current_buffer
)
5270 old_buffer
= current_buffer
;
5271 set_buffer_internal (XBUFFER (w
->buffer
));
5276 /* In case W->start is out of the accessible range, do something
5277 reasonable. This happens in Info mode when Info-scroll-down
5278 calls (recenter -1) while W->start is 1. */
5279 if (XMARKER (w
->start
)->charpos
< BEGV
)
5280 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
5281 else if (XMARKER (w
->start
)->charpos
> ZV
)
5282 SET_TEXT_POS (start
, ZV
, ZV_BYTE
);
5284 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5286 start_display (&it
, w
, start
);
5287 move_it_vertically (&it
, height
);
5288 bottom_y
= line_bottom_y (&it
);
5290 /* rms: On a non-window display,
5291 the value of it.vpos at the bottom of the screen
5292 seems to be 1 larger than window_box_height (w).
5293 This kludge fixes a bug whereby (move-to-window-line -1)
5294 when ZV is on the last screen line
5295 moves to the previous screen line instead of the last one. */
5296 if (! FRAME_WINDOW_P (XFRAME (w
->frame
)))
5299 /* Add in empty lines at the bottom of the window. */
5300 if (bottom_y
< height
)
5302 int uy
= FRAME_LINE_HEIGHT (it
.f
);
5303 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
5307 set_buffer_internal (old_buffer
);
5313 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
5314 doc
: /* Center point in window and redisplay frame.
5315 With prefix argument ARG, recenter putting point on screen line ARG
5316 relative to the current window. If ARG is negative, it counts up from the
5317 bottom of the window. (ARG should be less than the height of the window.)
5319 If ARG is omitted or nil, erase the entire frame and then
5320 redraw with point in the center of the current window.
5321 Just C-u as prefix means put point in the center of the window
5322 and redisplay normally--don't erase and redraw the frame. */)
5324 register Lisp_Object arg
;
5326 struct window
*w
= XWINDOW (selected_window
);
5327 struct buffer
*buf
= XBUFFER (w
->buffer
);
5328 struct buffer
*obuf
= current_buffer
;
5330 int charpos
, bytepos
;
5332 int this_scroll_margin
;
5334 /* If redisplay is suppressed due to an error, try again. */
5335 obuf
->display_error_modiff
= 0;
5341 /* Invalidate pixel data calculated for all compositions. */
5342 for (i
= 0; i
< n_compositions
; i
++)
5343 composition_table
[i
]->font
= NULL
;
5345 Fredraw_frame (w
->frame
);
5346 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
5349 else if (CONSP (arg
)) /* Just C-u. */
5353 arg
= Fprefix_numeric_value (arg
);
5358 set_buffer_internal (buf
);
5360 /* Do this after making BUF current
5361 in case scroll_margin is buffer-local. */
5362 this_scroll_margin
= max (0, scroll_margin
);
5363 this_scroll_margin
= min (this_scroll_margin
,
5364 XFASTINT (w
->total_lines
) / 4);
5366 /* Handle centering on a graphical frame specially. Such frames can
5367 have variable-height lines and centering point on the basis of
5368 line counts would lead to strange effects. */
5369 if (FRAME_WINDOW_P (XFRAME (w
->frame
)))
5376 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5377 start_display (&it
, w
, pt
);
5378 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
5379 charpos
= IT_CHARPOS (it
);
5380 bytepos
= IT_BYTEPOS (it
);
5387 int extra_line_spacing
;
5388 int h
= window_box_height (w
);
5390 iarg
= - max (-iarg
, this_scroll_margin
);
5392 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5393 start_display (&it
, w
, pt
);
5395 /* Be sure we have the exact height of the full line containing PT. */
5396 move_it_by_lines (&it
, 0, 1);
5398 /* The amount of pixels we have to move back is the window
5399 height minus what's displayed in the line containing PT,
5400 and the lines below. */
5403 move_it_by_lines (&it
, nlines
, 1);
5405 if (it
.vpos
== nlines
)
5409 /* Last line has no newline */
5410 h
-= line_bottom_y (&it
);
5414 /* Don't reserve space for extra line spacing of last line. */
5415 extra_line_spacing
= it
.max_extra_line_spacing
;
5417 /* If we can't move down NLINES lines because we hit
5418 the end of the buffer, count in some empty lines. */
5419 if (it
.vpos
< nlines
)
5422 extra_line_spacing
= it
.extra_line_spacing
;
5423 h
-= nlines
* (FRAME_LINE_HEIGHT (it
.f
) + extra_line_spacing
);
5428 /* Now find the new top line (starting position) of the window. */
5429 start_display (&it
, w
, pt
);
5431 move_it_vertically_backward (&it
, h
);
5433 /* If extra line spacing is present, we may move too far
5434 back. This causes the last line to be only partially
5435 visible (which triggers redisplay to recenter that line
5436 in the middle), so move forward.
5437 But ignore extra line spacing on last line, as it is not
5438 considered to be part of the visible height of the line.
5440 h
+= extra_line_spacing
;
5441 while (-it
.current_y
> h
)
5442 move_it_by_lines (&it
, 1, 1);
5444 charpos
= IT_CHARPOS (it
);
5445 bytepos
= IT_BYTEPOS (it
);
5449 struct position pos
;
5451 iarg
= max (iarg
, this_scroll_margin
);
5453 pos
= *vmotion (PT
, -iarg
, w
);
5454 charpos
= pos
.bufpos
;
5455 bytepos
= pos
.bytepos
;
5460 struct position pos
;
5461 int ht
= window_internal_height (w
);
5468 /* Don't let it get into the margin at either top or bottom. */
5469 iarg
= max (iarg
, this_scroll_margin
);
5470 iarg
= min (iarg
, ht
- this_scroll_margin
- 1);
5472 pos
= *vmotion (PT
, - iarg
, w
);
5473 charpos
= pos
.bufpos
;
5474 bytepos
= pos
.bytepos
;
5477 /* Set the new window start. */
5478 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
5479 w
->window_end_valid
= Qnil
;
5481 w
->optional_new_start
= Qt
;
5483 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
5484 w
->start_at_line_beg
= Qt
;
5486 w
->start_at_line_beg
= Qnil
;
5488 set_buffer_internal (obuf
);
5493 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
5495 doc
: /* Return the height in lines of the text display area of WINDOW.
5496 This doesn't include the mode-line (or header-line if any) or any
5497 partial-height lines in the text display area. */)
5501 struct window
*w
= decode_window (window
);
5502 int pixel_height
= window_box_height (w
);
5503 int line_height
= pixel_height
/ FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
5504 return make_number (line_height
);
5509 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
5511 doc
: /* Position point relative to window.
5512 With no argument, position point at center of window.
5513 An argument specifies vertical position within the window;
5514 zero means top of window, negative means relative to bottom of window. */)
5518 struct window
*w
= XWINDOW (selected_window
);
5522 int this_scroll_margin
;
5525 window
= selected_window
;
5526 start
= marker_position (w
->start
);
5527 if (start
< BEGV
|| start
> ZV
)
5529 int height
= window_internal_height (w
);
5530 Fvertical_motion (make_number (- (height
/ 2)), window
);
5531 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
5532 w
->start_at_line_beg
= Fbolp ();
5533 w
->force_start
= Qt
;
5536 Fgoto_char (w
->start
);
5538 lines
= displayed_window_lines (w
);
5541 this_scroll_margin
= max (0, scroll_margin
);
5542 this_scroll_margin
= min (this_scroll_margin
, lines
/ 4);
5546 XSETFASTINT (arg
, lines
/ 2);
5549 int iarg
= XINT (Fprefix_numeric_value (arg
));
5552 iarg
= iarg
+ lines
;
5554 #if 0 /* This code would prevent move-to-window-line from moving point
5555 to a place inside the scroll margins (which would cause the
5556 next redisplay to scroll). I wrote this code, but then concluded
5557 it is probably better not to install it. However, it is here
5558 inside #if 0 so as not to lose it. -- rms. */
5560 /* Don't let it get into the margin at either top or bottom. */
5561 iarg
= max (iarg
, this_scroll_margin
);
5562 iarg
= min (iarg
, lines
- this_scroll_margin
- 1);
5565 arg
= make_number (iarg
);
5568 /* Skip past a partially visible first line. */
5570 XSETINT (arg
, XINT (arg
) + 1);
5572 return Fvertical_motion (arg
, window
);
5577 /***********************************************************************
5578 Window Configuration
5579 ***********************************************************************/
5581 struct save_window_data
5583 EMACS_INT size_from_Lisp_Vector_struct
;
5584 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
5585 Lisp_Object frame_cols
, frame_lines
, frame_menu_bar_lines
;
5586 Lisp_Object frame_tool_bar_lines
;
5587 Lisp_Object selected_frame
;
5588 Lisp_Object current_window
;
5589 Lisp_Object current_buffer
;
5590 Lisp_Object minibuf_scroll_window
;
5591 Lisp_Object minibuf_selected_window
;
5592 Lisp_Object root_window
;
5593 Lisp_Object focus_frame
;
5594 /* Record the values of window-min-width and window-min-height
5595 so that window sizes remain consistent with them. */
5596 Lisp_Object min_width
, min_height
;
5597 /* A vector, each of whose elements is a struct saved_window
5599 Lisp_Object saved_windows
;
5602 /* This is saved as a Lisp_Vector */
5605 /* these first two must agree with struct Lisp_Vector in lisp.h */
5606 EMACS_INT size_from_Lisp_Vector_struct
;
5607 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
5610 Lisp_Object buffer
, start
, pointm
, mark
;
5611 Lisp_Object left_col
, top_line
, total_cols
, total_lines
;
5612 Lisp_Object hscroll
, min_hscroll
;
5613 Lisp_Object parent
, prev
;
5614 Lisp_Object start_at_line_beg
;
5615 Lisp_Object display_table
;
5616 Lisp_Object orig_top_line
, orig_total_lines
;
5617 Lisp_Object left_margin_cols
, right_margin_cols
;
5618 Lisp_Object left_fringe_width
, right_fringe_width
, fringes_outside_margins
;
5619 Lisp_Object scroll_bar_width
, vertical_scroll_bar_type
;
5622 #define SAVED_WINDOW_N(swv,n) \
5623 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
5625 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
5626 doc
: /* Return t if OBJECT is a window-configuration object. */)
5630 if (WINDOW_CONFIGURATIONP (object
))
5635 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
5636 doc
: /* Return the frame that CONFIG, a window-configuration object, is about. */)
5640 register struct save_window_data
*data
;
5641 struct Lisp_Vector
*saved_windows
;
5643 if (! WINDOW_CONFIGURATIONP (config
))
5644 wrong_type_argument (Qwindow_configuration_p
, config
);
5646 data
= (struct save_window_data
*) XVECTOR (config
);
5647 saved_windows
= XVECTOR (data
->saved_windows
);
5648 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5651 DEFUN ("set-window-configuration", Fset_window_configuration
,
5652 Sset_window_configuration
, 1, 1, 0,
5653 doc
: /* Set the configuration of windows and buffers as specified by CONFIGURATION.
5654 CONFIGURATION must be a value previously returned
5655 by `current-window-configuration' (which see).
5656 If CONFIGURATION was made from a frame that is now deleted,
5657 only frame-independent values can be restored. In this case,
5658 the return value is nil. Otherwise the value is t. */)
5660 Lisp_Object configuration
;
5662 register struct save_window_data
*data
;
5663 struct Lisp_Vector
*saved_windows
;
5664 Lisp_Object new_current_buffer
;
5669 while (!WINDOW_CONFIGURATIONP (configuration
))
5670 wrong_type_argument (Qwindow_configuration_p
, configuration
);
5672 data
= (struct save_window_data
*) XVECTOR (configuration
);
5673 saved_windows
= XVECTOR (data
->saved_windows
);
5675 new_current_buffer
= data
->current_buffer
;
5676 if (NILP (XBUFFER (new_current_buffer
)->name
))
5677 new_current_buffer
= Qnil
;
5680 if (XBUFFER (new_current_buffer
) == current_buffer
)
5683 /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of
5684 point in new_current_buffer as of the last time this buffer was
5685 used. This can be non-deterministic since it can be changed by
5686 things like jit-lock by mere temporary selection of some random
5687 window that happens to show this buffer.
5688 So if possible we want this arbitrary choice of "which point" to
5689 be the one from the to-be-selected-window so as to prevent this
5690 window's cursor from being copied from another window. */
5691 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
5692 /* If current_window = selected_window, its point is in BUF_PT. */
5693 && !EQ (selected_window
, data
->current_window
))
5694 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
5696 old_point
= BUF_PT (XBUFFER (new_current_buffer
));
5699 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5702 /* If f is a dead frame, don't bother rebuilding its window tree.
5703 However, there is other stuff we should still try to do below. */
5704 if (FRAME_LIVE_P (f
))
5706 register struct window
*w
;
5707 register struct saved_window
*p
;
5708 struct window
*root_window
;
5709 struct window
**leaf_windows
;
5713 /* If the frame has been resized since this window configuration was
5714 made, we change the frame to the size specified in the
5715 configuration, restore the configuration, and then resize it
5716 back. We keep track of the prevailing height in these variables. */
5717 int previous_frame_lines
= FRAME_LINES (f
);
5718 int previous_frame_cols
= FRAME_COLS (f
);
5719 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
5720 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
5722 /* The mouse highlighting code could get screwed up
5723 if it runs during this. */
5726 if (XFASTINT (data
->frame_lines
) != previous_frame_lines
5727 || XFASTINT (data
->frame_cols
) != previous_frame_cols
)
5728 change_frame_size (f
, XFASTINT (data
->frame_lines
),
5729 XFASTINT (data
->frame_cols
), 0, 0, 0);
5730 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5731 if (XFASTINT (data
->frame_menu_bar_lines
)
5732 != previous_frame_menu_bar_lines
)
5733 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
5734 #ifdef HAVE_WINDOW_SYSTEM
5735 if (XFASTINT (data
->frame_tool_bar_lines
)
5736 != previous_frame_tool_bar_lines
)
5737 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
5741 /* "Swap out" point from the selected window's buffer
5742 into the window itself. (Normally the pointm of the selected
5743 window holds garbage.) We do this now, before
5744 restoring the window contents, and prevent it from
5745 being done later on when we select a new window. */
5746 if (! NILP (XWINDOW (selected_window
)->buffer
))
5748 w
= XWINDOW (selected_window
);
5749 set_marker_both (w
->pointm
,
5751 BUF_PT (XBUFFER (w
->buffer
)),
5752 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5755 windows_or_buffers_changed
++;
5756 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
5758 /* Problem: Freeing all matrices and later allocating them again
5759 is a serious redisplay flickering problem. What we would
5760 really like to do is to free only those matrices not reused
5762 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
5764 = (struct window
**) alloca (count_windows (root_window
)
5765 * sizeof (struct window
*));
5766 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
5768 /* Temporarily avoid any problems with windows that are smaller
5769 than they are supposed to be. */
5770 window_min_height
= 1;
5771 window_min_width
= 1;
5774 Mark all windows now on frame as "deleted".
5775 Restoring the new configuration "undeletes" any that are in it.
5777 Save their current buffers in their height fields, since we may
5778 need it later, if a buffer saved in the configuration is now
5780 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5782 for (k
= 0; k
< saved_windows
->size
; k
++)
5784 p
= SAVED_WINDOW_N (saved_windows
, k
);
5785 w
= XWINDOW (p
->window
);
5788 if (!NILP (p
->parent
))
5789 w
->parent
= SAVED_WINDOW_N (saved_windows
,
5790 XFASTINT (p
->parent
))->window
;
5794 if (!NILP (p
->prev
))
5796 w
->prev
= SAVED_WINDOW_N (saved_windows
,
5797 XFASTINT (p
->prev
))->window
;
5798 XWINDOW (w
->prev
)->next
= p
->window
;
5803 if (!NILP (w
->parent
))
5805 if (EQ (p
->total_cols
, XWINDOW (w
->parent
)->total_cols
))
5807 XWINDOW (w
->parent
)->vchild
= p
->window
;
5808 XWINDOW (w
->parent
)->hchild
= Qnil
;
5812 XWINDOW (w
->parent
)->hchild
= p
->window
;
5813 XWINDOW (w
->parent
)->vchild
= Qnil
;
5818 /* If we squirreled away the buffer in the window's height,
5820 if (BUFFERP (w
->total_lines
))
5821 w
->buffer
= w
->total_lines
;
5822 w
->left_col
= p
->left_col
;
5823 w
->top_line
= p
->top_line
;
5824 w
->total_cols
= p
->total_cols
;
5825 w
->total_lines
= p
->total_lines
;
5826 w
->hscroll
= p
->hscroll
;
5827 w
->min_hscroll
= p
->min_hscroll
;
5828 w
->display_table
= p
->display_table
;
5829 w
->orig_top_line
= p
->orig_top_line
;
5830 w
->orig_total_lines
= p
->orig_total_lines
;
5831 w
->left_margin_cols
= p
->left_margin_cols
;
5832 w
->right_margin_cols
= p
->right_margin_cols
;
5833 w
->left_fringe_width
= p
->left_fringe_width
;
5834 w
->right_fringe_width
= p
->right_fringe_width
;
5835 w
->fringes_outside_margins
= p
->fringes_outside_margins
;
5836 w
->scroll_bar_width
= p
->scroll_bar_width
;
5837 w
->vertical_scroll_bar_type
= p
->vertical_scroll_bar_type
;
5838 XSETFASTINT (w
->last_modified
, 0);
5839 XSETFASTINT (w
->last_overlay_modified
, 0);
5841 /* Reinstall the saved buffer and pointers into it. */
5842 if (NILP (p
->buffer
))
5843 w
->buffer
= p
->buffer
;
5846 if (!NILP (XBUFFER (p
->buffer
)->name
))
5847 /* If saved buffer is alive, install it. */
5849 w
->buffer
= p
->buffer
;
5850 w
->start_at_line_beg
= p
->start_at_line_beg
;
5851 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
5852 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
5853 Fset_marker (XBUFFER (w
->buffer
)->mark
,
5854 p
->mark
, w
->buffer
);
5856 /* As documented in Fcurrent_window_configuration, don't
5857 restore the location of point in the buffer which was
5858 current when the window configuration was recorded. */
5859 if (!EQ (p
->buffer
, new_current_buffer
)
5860 && XBUFFER (p
->buffer
) == current_buffer
)
5861 Fgoto_char (w
->pointm
);
5863 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
5864 /* Else unless window has a live buffer, get one. */
5866 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
5867 /* This will set the markers to beginning of visible
5869 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
5870 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
5871 w
->start_at_line_beg
= Qt
;
5874 /* Keeping window's old buffer; make sure the markers
5877 /* Set window markers at start of visible range. */
5878 if (XMARKER (w
->start
)->buffer
== 0)
5879 set_marker_restricted (w
->start
, make_number (0),
5881 if (XMARKER (w
->pointm
)->buffer
== 0)
5882 set_marker_restricted_both (w
->pointm
, w
->buffer
,
5883 BUF_PT (XBUFFER (w
->buffer
)),
5884 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5885 w
->start_at_line_beg
= Qt
;
5890 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
5891 /* Prevent "swapping out point" in the old selected window
5892 using the buffer that has been restored into it.
5893 We already swapped out point that from that window's old buffer. */
5894 selected_window
= Qnil
;
5896 /* Arrange *not* to restore point in the buffer that was
5897 current when the window configuration was saved. */
5898 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
))
5899 set_marker_restricted (XWINDOW (data
->current_window
)->pointm
,
5900 make_number (old_point
),
5901 XWINDOW (data
->current_window
)->buffer
);
5903 Fselect_window (data
->current_window
, Qnil
);
5904 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
5907 if (NILP (data
->focus_frame
)
5908 || (FRAMEP (data
->focus_frame
)
5909 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
5910 Fredirect_frame_focus (frame
, data
->focus_frame
);
5912 #if 0 /* I don't understand why this is needed, and it causes problems
5913 when the frame's old selected window has been deleted. */
5914 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
5915 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
5919 /* Set the screen height to the value it had before this function. */
5920 if (previous_frame_lines
!= FRAME_LINES (f
)
5921 || previous_frame_cols
!= FRAME_COLS (f
))
5922 change_frame_size (f
, previous_frame_lines
, previous_frame_cols
,
5924 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5925 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
5926 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
5928 #ifdef HAVE_WINDOW_SYSTEM
5929 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
5930 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
5935 /* Now, free glyph matrices in windows that were not reused. */
5936 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
5938 if (NILP (leaf_windows
[i
]->buffer
))
5940 /* Assert it's not reused as a combination. */
5941 xassert (NILP (leaf_windows
[i
]->hchild
)
5942 && NILP (leaf_windows
[i
]->vchild
));
5943 free_window_matrices (leaf_windows
[i
]);
5945 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
5953 /* Fselect_window will have made f the selected frame, so we
5954 reselect the proper frame here. Fhandle_switch_frame will change the
5955 selected window too, but that doesn't make the call to
5956 Fselect_window above totally superfluous; it still sets f's
5958 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
5959 do_switch_frame (data
->selected_frame
, 0, 0);
5961 if (! NILP (Vwindow_configuration_change_hook
)
5962 && ! NILP (Vrun_hooks
))
5963 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
5966 if (!NILP (new_current_buffer
))
5967 Fset_buffer (new_current_buffer
);
5969 /* Restore the minimum heights recorded in the configuration. */
5970 window_min_height
= XINT (data
->min_height
);
5971 window_min_width
= XINT (data
->min_width
);
5973 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
5974 minibuf_selected_window
= data
->minibuf_selected_window
;
5976 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
5979 /* Mark all windows now on frame as deleted
5980 by setting their buffers to nil. */
5983 delete_all_subwindows (w
)
5984 register struct window
*w
;
5986 if (!NILP (w
->next
))
5987 delete_all_subwindows (XWINDOW (w
->next
));
5988 if (!NILP (w
->vchild
))
5989 delete_all_subwindows (XWINDOW (w
->vchild
));
5990 if (!NILP (w
->hchild
))
5991 delete_all_subwindows (XWINDOW (w
->hchild
));
5993 w
->total_lines
= w
->buffer
; /* See Fset_window_configuration for excuse. */
5995 if (!NILP (w
->buffer
))
5998 /* We set all three of these fields to nil, to make sure that we can
5999 distinguish this dead window from any live window. Live leaf
6000 windows will have buffer set, and combination windows will have
6001 vchild or hchild set. */
6006 Vwindow_list
= Qnil
;
6010 count_windows (window
)
6011 register struct window
*window
;
6013 register int count
= 1;
6014 if (!NILP (window
->next
))
6015 count
+= count_windows (XWINDOW (window
->next
));
6016 if (!NILP (window
->vchild
))
6017 count
+= count_windows (XWINDOW (window
->vchild
));
6018 if (!NILP (window
->hchild
))
6019 count
+= count_windows (XWINDOW (window
->hchild
));
6024 /* Fill vector FLAT with leaf windows under W, starting at index I.
6025 Value is last index + 1. */
6028 get_leaf_windows (w
, flat
, i
)
6030 struct window
**flat
;
6035 if (!NILP (w
->hchild
))
6036 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
6037 else if (!NILP (w
->vchild
))
6038 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
6042 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6049 /* Return a pointer to the glyph W's physical cursor is on. Value is
6050 null if W's current matrix is invalid, so that no meaningfull glyph
6054 get_phys_cursor_glyph (w
)
6057 struct glyph_row
*row
;
6058 struct glyph
*glyph
;
6060 if (w
->phys_cursor
.vpos
>= 0
6061 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
6062 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
6064 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
6065 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
6074 save_window_save (window
, vector
, i
)
6076 struct Lisp_Vector
*vector
;
6079 register struct saved_window
*p
;
6080 register struct window
*w
;
6081 register Lisp_Object tem
;
6083 for (;!NILP (window
); window
= w
->next
)
6085 p
= SAVED_WINDOW_N (vector
, i
);
6086 w
= XWINDOW (window
);
6088 XSETFASTINT (w
->temslot
, i
); i
++;
6090 p
->buffer
= w
->buffer
;
6091 p
->left_col
= w
->left_col
;
6092 p
->top_line
= w
->top_line
;
6093 p
->total_cols
= w
->total_cols
;
6094 p
->total_lines
= w
->total_lines
;
6095 p
->hscroll
= w
->hscroll
;
6096 p
->min_hscroll
= w
->min_hscroll
;
6097 p
->display_table
= w
->display_table
;
6098 p
->orig_top_line
= w
->orig_top_line
;
6099 p
->orig_total_lines
= w
->orig_total_lines
;
6100 p
->left_margin_cols
= w
->left_margin_cols
;
6101 p
->right_margin_cols
= w
->right_margin_cols
;
6102 p
->left_fringe_width
= w
->left_fringe_width
;
6103 p
->right_fringe_width
= w
->right_fringe_width
;
6104 p
->fringes_outside_margins
= w
->fringes_outside_margins
;
6105 p
->scroll_bar_width
= w
->scroll_bar_width
;
6106 p
->vertical_scroll_bar_type
= w
->vertical_scroll_bar_type
;
6107 if (!NILP (w
->buffer
))
6109 /* Save w's value of point in the window configuration.
6110 If w is the selected window, then get the value of point
6111 from the buffer; pointm is garbage in the selected window. */
6112 if (EQ (window
, selected_window
))
6114 p
->pointm
= Fmake_marker ();
6115 set_marker_both (p
->pointm
, w
->buffer
,
6116 BUF_PT (XBUFFER (w
->buffer
)),
6117 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6120 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
6122 p
->start
= Fcopy_marker (w
->start
, Qnil
);
6123 p
->start_at_line_beg
= w
->start_at_line_beg
;
6125 tem
= XBUFFER (w
->buffer
)->mark
;
6126 p
->mark
= Fcopy_marker (tem
, Qnil
);
6133 p
->start_at_line_beg
= Qnil
;
6136 if (NILP (w
->parent
))
6139 p
->parent
= XWINDOW (w
->parent
)->temslot
;
6144 p
->prev
= XWINDOW (w
->prev
)->temslot
;
6146 if (!NILP (w
->vchild
))
6147 i
= save_window_save (w
->vchild
, vector
, i
);
6148 if (!NILP (w
->hchild
))
6149 i
= save_window_save (w
->hchild
, vector
, i
);
6155 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
6156 Scurrent_window_configuration
, 0, 1, 0,
6157 doc
: /* Return an object representing the current window configuration of FRAME.
6158 If FRAME is nil or omitted, use the selected frame.
6159 This describes the number of windows, their sizes and current buffers,
6160 and for each displayed buffer, where display starts, and the positions of
6161 point and mark. An exception is made for point in the current buffer:
6162 its value is -not- saved.
6163 This also records the currently selected frame, and FRAME's focus
6164 redirection (see `redirect-frame-focus'). */)
6168 register Lisp_Object tem
;
6169 register int n_windows
;
6170 register struct save_window_data
*data
;
6171 register struct Lisp_Vector
*vec
;
6176 frame
= selected_frame
;
6177 CHECK_LIVE_FRAME (frame
);
6180 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6181 vec
= allocate_other_vector (VECSIZE (struct save_window_data
));
6182 data
= (struct save_window_data
*)vec
;
6184 XSETFASTINT (data
->frame_cols
, FRAME_COLS (f
));
6185 XSETFASTINT (data
->frame_lines
, FRAME_LINES (f
));
6186 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
6187 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
6188 data
->selected_frame
= selected_frame
;
6189 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
6190 XSETBUFFER (data
->current_buffer
, current_buffer
);
6191 data
->minibuf_scroll_window
= minibuf_level
> 0 ? Vminibuf_scroll_window
: Qnil
;
6192 data
->minibuf_selected_window
= minibuf_level
> 0 ? minibuf_selected_window
: Qnil
;
6193 data
->root_window
= FRAME_ROOT_WINDOW (f
);
6194 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
6195 XSETINT (data
->min_height
, window_min_height
);
6196 XSETINT (data
->min_width
, window_min_width
);
6197 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
6198 data
->saved_windows
= tem
;
6199 for (i
= 0; i
< n_windows
; i
++)
6200 XVECTOR (tem
)->contents
[i
]
6201 = Fmake_vector (make_number (VECSIZE (struct saved_window
)), Qnil
);
6202 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
6203 XSETWINDOW_CONFIGURATION (tem
, data
);
6207 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
6209 doc
: /* Execute BODY, preserving window sizes and contents.
6210 Return the value of the last form in BODY.
6211 Restore which buffer appears in which window, where display starts,
6212 and the value of point and mark for each window.
6213 Also restore the choice of selected window.
6214 Also restore which buffer is current.
6215 Does not restore the value of point in current buffer.
6216 usage: (save-window-excursion BODY ...) */)
6220 register Lisp_Object val
;
6221 register int count
= SPECPDL_INDEX ();
6223 record_unwind_protect (Fset_window_configuration
,
6224 Fcurrent_window_configuration (Qnil
));
6225 val
= Fprogn (args
);
6226 return unbind_to (count
, val
);
6231 /***********************************************************************
6233 ***********************************************************************/
6239 Lisp_Object tail
= Qnil
;
6240 Lisp_Object result
= Qnil
;
6247 if (!NILP (w
->hchild
))
6248 wn
= Fcons (Qnil
, Fcons (Fwindow_edges (wn
),
6249 window_tree (XWINDOW (w
->hchild
))));
6250 else if (!NILP (w
->vchild
))
6251 wn
= Fcons (Qt
, Fcons (Fwindow_edges (wn
),
6252 window_tree (XWINDOW (w
->vchild
))));
6256 result
= tail
= Fcons (wn
, Qnil
);
6260 XSETCDR (tail
, Fcons (wn
, Qnil
));
6264 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6272 DEFUN ("window-tree", Fwindow_tree
, Swindow_tree
,
6274 doc
: /* Return the window tree for frame FRAME.
6276 The return value is a list of the form (ROOT MINI), where ROOT
6277 represents the window tree of the frame's root window, and MINI
6278 is the frame's minibuffer window.
6280 If the root window is not split, ROOT is the root window itself.
6281 Otherwise, ROOT is a list (DIR EDGES W1 W2 ...) where DIR is nil for a
6282 horizontal split, and t for a vertical split, EDGES gives the combined
6283 size and position of the subwindows in the split, and the rest of the
6284 elements are the subwindows in the split. Each of the subwindows may
6285 again be a window or a list representing a window split, and so on.
6286 EDGES is a list \(LEFT TOP RIGHT BOTTOM) as returned by `window-edges'.
6288 If FRAME is nil or omitted, return information on the currently
6297 frame
= selected_frame
;
6299 CHECK_FRAME (frame
);
6302 if (!FRAME_LIVE_P (f
))
6305 return window_tree (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6309 /***********************************************************************
6311 ***********************************************************************/
6313 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
6315 doc
: /* Set width of marginal areas of window WINDOW.
6316 If WINDOW is nil, set margins of the currently selected window.
6317 Second arg LEFT-WIDTH specifies the number of character cells to
6318 reserve for the left marginal area. Optional third arg RIGHT-WIDTH
6319 does the same for the right marginal area. A nil width parameter
6320 means no margin. */)
6321 (window
, left_width
, right_width
)
6322 Lisp_Object window
, left_width
, right_width
;
6324 struct window
*w
= decode_window (window
);
6326 /* Translate negative or zero widths to nil.
6327 Margins that are too wide have to be checked elsewhere. */
6329 if (!NILP (left_width
))
6331 CHECK_NUMBER (left_width
);
6332 if (XINT (left_width
) <= 0)
6336 if (!NILP (right_width
))
6338 CHECK_NUMBER (right_width
);
6339 if (XINT (right_width
) <= 0)
6343 if (!EQ (w
->left_margin_cols
, left_width
)
6344 || !EQ (w
->right_margin_cols
, right_width
))
6346 w
->left_margin_cols
= left_width
;
6347 w
->right_margin_cols
= right_width
;
6349 adjust_window_margins (w
);
6351 ++windows_or_buffers_changed
;
6352 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6359 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
6361 doc
: /* Get width of marginal areas of window WINDOW.
6362 If WINDOW is omitted or nil, use the currently selected window.
6363 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).
6364 If a marginal area does not exist, its width will be returned
6369 struct window
*w
= decode_window (window
);
6370 return Fcons (w
->left_margin_cols
, w
->right_margin_cols
);
6375 /***********************************************************************
6377 ***********************************************************************/
6379 DEFUN ("set-window-fringes", Fset_window_fringes
, Sset_window_fringes
,
6381 doc
: /* Set the fringe widths of window WINDOW.
6382 If WINDOW is nil, set the fringe widths of the currently selected
6384 Second arg LEFT-WIDTH specifies the number of pixels to reserve for
6385 the left fringe. Optional third arg RIGHT-WIDTH specifies the right
6386 fringe width. If a fringe width arg is nil, that means to use the
6387 frame's default fringe width. Default fringe widths can be set with
6388 the command `set-fringe-style'.
6389 If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes
6390 outside of the display margins. By default, fringes are drawn between
6391 display marginal areas and the text area. */)
6392 (window
, left_width
, right_width
, outside_margins
)
6393 Lisp_Object window
, left_width
, right_width
, outside_margins
;
6395 struct window
*w
= decode_window (window
);
6397 if (!NILP (left_width
))
6398 CHECK_NATNUM (left_width
);
6399 if (!NILP (right_width
))
6400 CHECK_NATNUM (right_width
);
6402 if (!EQ (w
->left_fringe_width
, left_width
)
6403 || !EQ (w
->right_fringe_width
, right_width
)
6404 || !EQ (w
->fringes_outside_margins
, outside_margins
))
6406 w
->left_fringe_width
= left_width
;
6407 w
->right_fringe_width
= right_width
;
6408 w
->fringes_outside_margins
= outside_margins
;
6410 adjust_window_margins (w
);
6412 clear_glyph_matrix (w
->current_matrix
);
6413 w
->window_end_valid
= Qnil
;
6415 ++windows_or_buffers_changed
;
6416 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6423 DEFUN ("window-fringes", Fwindow_fringes
, Swindow_fringes
,
6425 doc
: /* Get width of fringes of window WINDOW.
6426 If WINDOW is omitted or nil, use the currently selected window.
6427 Value is a list of the form (LEFT-WIDTH RIGHT-WIDTH OUTSIDE-MARGINS). */)
6431 struct window
*w
= decode_window (window
);
6432 return Fcons (make_number (WINDOW_LEFT_FRINGE_WIDTH (w
)),
6433 Fcons (make_number (WINDOW_RIGHT_FRINGE_WIDTH (w
)),
6434 Fcons ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
) ?
6435 Qt
: Qnil
), Qnil
)));
6440 /***********************************************************************
6442 ***********************************************************************/
6444 DEFUN ("set-window-scroll-bars", Fset_window_scroll_bars
, Sset_window_scroll_bars
,
6446 doc
: /* Set width and type of scroll bars of window WINDOW.
6447 If window is nil, set scroll bars of the currently selected window.
6448 Second parameter WIDTH specifies the pixel width for the scroll bar;
6449 this is automatically adjusted to a multiple of the frame column width.
6450 Third parameter VERTICAL-TYPE specifies the type of the vertical scroll
6451 bar: left, right, or nil.
6452 If WIDTH is nil, use the frame's scroll-bar width.
6453 If TYPE is t, use the frame's scroll-bar type. */)
6454 (window
, width
, vertical_type
, horizontal_type
)
6455 Lisp_Object window
, width
, vertical_type
, horizontal_type
;
6457 struct window
*w
= decode_window (window
);
6461 CHECK_NATNUM (width
);
6463 if (XINT (width
) == 0)
6464 vertical_type
= Qnil
;
6467 if (!(EQ (vertical_type
, Qnil
)
6468 || EQ (vertical_type
, Qleft
)
6469 || EQ (vertical_type
, Qright
)
6470 || EQ (vertical_type
, Qt
)))
6471 error ("Invalid type of vertical scroll bar");
6473 if (!EQ (w
->scroll_bar_width
, width
)
6474 || !EQ (w
->vertical_scroll_bar_type
, vertical_type
))
6476 w
->scroll_bar_width
= width
;
6477 w
->vertical_scroll_bar_type
= vertical_type
;
6479 adjust_window_margins (w
);
6481 clear_glyph_matrix (w
->current_matrix
);
6482 w
->window_end_valid
= Qnil
;
6484 ++windows_or_buffers_changed
;
6485 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6492 DEFUN ("window-scroll-bars", Fwindow_scroll_bars
, Swindow_scroll_bars
,
6494 doc
: /* Get width and type of scroll bars of window WINDOW.
6495 If WINDOW is omitted or nil, use the currently selected window.
6496 Value is a list of the form (WIDTH COLS VERTICAL-TYPE HORIZONTAL-TYPE).
6497 If WIDTH is nil or TYPE is t, the window is using the frame's corresponding
6502 struct window
*w
= decode_window (window
);
6503 return Fcons (make_number ((WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6504 ? WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6505 : WINDOW_SCROLL_BAR_AREA_WIDTH (w
))),
6506 Fcons (make_number (WINDOW_SCROLL_BAR_COLS (w
)),
6507 Fcons (w
->vertical_scroll_bar_type
,
6508 Fcons (Qnil
, Qnil
))));
6513 /***********************************************************************
6515 ***********************************************************************/
6517 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 2, 0,
6518 doc
: /* Return the amount by which WINDOW is scrolled vertically.
6519 Use the selected window if WINDOW is nil or omitted.
6520 Normally, value is a multiple of the canonical character height of WINDOW;
6521 optional second arg PIXELS_P means value is measured in pixels. */)
6523 Lisp_Object window
, pixels_p
;
6530 window
= selected_window
;
6532 CHECK_WINDOW (window
);
6533 w
= XWINDOW (window
);
6534 f
= XFRAME (w
->frame
);
6536 if (FRAME_WINDOW_P (f
))
6537 result
= (NILP (pixels_p
)
6538 ? FRAME_CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
)
6539 : make_number (-w
->vscroll
));
6541 result
= make_number (0);
6546 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
6548 doc
: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL.
6549 WINDOW nil means use the selected window. Normally, VSCROLL is a
6550 non-negative multiple of the canonical character height of WINDOW;
6551 optional third arg PIXELS_P non-nil means that VSCROLL is in pixels.
6552 If PIXELS-P is nil, VSCROLL may have to be rounded so that it
6553 corresponds to an integral number of pixels. The return value is the
6554 result of this rounding.
6555 If PIXELS-P is non-nil, the return value is VSCROLL. */)
6556 (window
, vscroll
, pixels_p
)
6557 Lisp_Object window
, vscroll
, pixels_p
;
6563 window
= selected_window
;
6565 CHECK_WINDOW (window
);
6566 CHECK_NUMBER_OR_FLOAT (vscroll
);
6568 w
= XWINDOW (window
);
6569 f
= XFRAME (w
->frame
);
6571 if (FRAME_WINDOW_P (f
))
6573 int old_dy
= w
->vscroll
;
6575 w
->vscroll
= - (NILP (pixels_p
)
6576 ? FRAME_LINE_HEIGHT (f
) * XFLOATINT (vscroll
)
6577 : XFLOATINT (vscroll
));
6578 w
->vscroll
= min (w
->vscroll
, 0);
6580 if (w
->vscroll
!= old_dy
)
6582 /* Adjust glyph matrix of the frame if the virtual display
6583 area becomes larger than before. */
6584 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
6587 /* Prevent redisplay shortcuts. */
6588 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
6592 return Fwindow_vscroll (window
, pixels_p
);
6596 /* Call FN for all leaf windows on frame F. FN is called with the
6597 first argument being a pointer to the leaf window, and with
6598 additional argument USER_DATA. Stops when FN returns 0. */
6601 foreach_window (f
, fn
, user_data
)
6603 int (* fn
) P_ ((struct window
*, void *));
6606 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
6610 /* Helper function for foreach_window. Call FN for all leaf windows
6611 reachable from W. FN is called with the first argument being a
6612 pointer to the leaf window, and with additional argument USER_DATA.
6613 Stop when FN returns 0. Value is 0 if stopped by FN. */
6616 foreach_window_1 (w
, fn
, user_data
)
6618 int (* fn
) P_ ((struct window
*, void *));
6623 for (cont
= 1; w
&& cont
;)
6625 if (!NILP (w
->hchild
))
6626 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
6627 else if (!NILP (w
->vchild
))
6628 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
6630 cont
= fn (w
, user_data
);
6632 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6639 /* Freeze or unfreeze the window start of W unless it is a
6640 mini-window or the selected window. FREEZE_P non-null means freeze
6641 the window start. */
6644 freeze_window_start (w
, freeze_p
)
6648 if (w
== XWINDOW (selected_window
)
6649 || MINI_WINDOW_P (w
)
6650 || (MINI_WINDOW_P (XWINDOW (selected_window
))
6651 && ! NILP (Vminibuf_scroll_window
)
6652 && w
== XWINDOW (Vminibuf_scroll_window
)))
6655 w
->frozen_window_start_p
= freeze_p
!= NULL
;
6660 /* Freeze or unfreeze the window starts of all leaf windows on frame
6661 F, except the selected window and a mini-window. FREEZE_P non-zero
6662 means freeze the window start. */
6665 freeze_window_starts (f
, freeze_p
)
6669 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
6673 /***********************************************************************
6675 ***********************************************************************/
6677 /* Return 1 if window configurations C1 and C2
6678 describe the same state of affairs. This is used by Fequal. */
6681 compare_window_configurations (c1
, c2
, ignore_positions
)
6683 int ignore_positions
;
6685 register struct save_window_data
*d1
, *d2
;
6686 struct Lisp_Vector
*sw1
, *sw2
;
6689 if (!WINDOW_CONFIGURATIONP (c1
))
6690 wrong_type_argument (Qwindow_configuration_p
, c1
);
6691 if (!WINDOW_CONFIGURATIONP (c2
))
6692 wrong_type_argument (Qwindow_configuration_p
, c2
);
6694 d1
= (struct save_window_data
*) XVECTOR (c1
);
6695 d2
= (struct save_window_data
*) XVECTOR (c2
);
6696 sw1
= XVECTOR (d1
->saved_windows
);
6697 sw2
= XVECTOR (d2
->saved_windows
);
6699 if (! EQ (d1
->frame_cols
, d2
->frame_cols
))
6701 if (! EQ (d1
->frame_lines
, d2
->frame_lines
))
6703 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
6705 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
6707 /* Don't compare the current_window field directly.
6708 Instead see w1_is_current and w2_is_current, below. */
6709 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
6711 if (! ignore_positions
)
6713 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
6715 if (! EQ (d1
->minibuf_selected_window
, d2
->minibuf_selected_window
))
6718 /* Don't compare the root_window field.
6719 We don't require the two configurations
6720 to use the same window object,
6721 and the two root windows must be equivalent
6722 if everything else compares equal. */
6723 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
6725 if (! EQ (d1
->min_width
, d2
->min_width
))
6727 if (! EQ (d1
->min_height
, d2
->min_height
))
6730 /* Verify that the two confis have the same number of windows. */
6731 if (sw1
->size
!= sw2
->size
)
6734 for (i
= 0; i
< sw1
->size
; i
++)
6736 struct saved_window
*p1
, *p2
;
6737 int w1_is_current
, w2_is_current
;
6739 p1
= SAVED_WINDOW_N (sw1
, i
);
6740 p2
= SAVED_WINDOW_N (sw2
, i
);
6742 /* Verify that the current windows in the two
6743 configurations correspond to each other. */
6744 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
6745 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
6747 if (w1_is_current
!= w2_is_current
)
6750 /* Verify that the corresponding windows do match. */
6751 if (! EQ (p1
->buffer
, p2
->buffer
))
6753 if (! EQ (p1
->left_col
, p2
->left_col
))
6755 if (! EQ (p1
->top_line
, p2
->top_line
))
6757 if (! EQ (p1
->total_cols
, p2
->total_cols
))
6759 if (! EQ (p1
->total_lines
, p2
->total_lines
))
6761 if (! EQ (p1
->display_table
, p2
->display_table
))
6763 if (! EQ (p1
->parent
, p2
->parent
))
6765 if (! EQ (p1
->prev
, p2
->prev
))
6767 if (! ignore_positions
)
6769 if (! EQ (p1
->hscroll
, p2
->hscroll
))
6771 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
6773 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
6775 if (NILP (Fequal (p1
->start
, p2
->start
)))
6777 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
6779 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
6782 if (! EQ (p1
->left_margin_cols
, p2
->left_margin_cols
))
6784 if (! EQ (p1
->right_margin_cols
, p2
->right_margin_cols
))
6786 if (! EQ (p1
->left_fringe_width
, p2
->left_fringe_width
))
6788 if (! EQ (p1
->right_fringe_width
, p2
->right_fringe_width
))
6790 if (! EQ (p1
->fringes_outside_margins
, p2
->fringes_outside_margins
))
6792 if (! EQ (p1
->scroll_bar_width
, p2
->scroll_bar_width
))
6794 if (! EQ (p1
->vertical_scroll_bar_type
, p2
->vertical_scroll_bar_type
))
6801 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
6802 Scompare_window_configurations
, 2, 2, 0,
6803 doc
: /* Compare two window configurations as regards the structure of windows.
6804 This function ignores details such as the values of point and mark
6805 and scrolling positions. */)
6809 if (compare_window_configurations (x
, y
, 1))
6817 struct frame
*f
= make_terminal_frame ();
6818 XSETFRAME (selected_frame
, f
);
6819 Vterminal_frame
= selected_frame
;
6820 minibuf_window
= f
->minibuffer_window
;
6821 selected_window
= f
->selected_window
;
6822 last_nonminibuf_frame
= f
;
6824 window_initialized
= 1;
6830 Vwindow_list
= Qnil
;
6836 Qwindow_size_fixed
= intern ("window-size-fixed");
6837 staticpro (&Qwindow_size_fixed
);
6838 Fset (Qwindow_size_fixed
, Qnil
);
6840 staticpro (&Qwindow_configuration_change_hook
);
6841 Qwindow_configuration_change_hook
6842 = intern ("window-configuration-change-hook");
6844 Qwindowp
= intern ("windowp");
6845 staticpro (&Qwindowp
);
6847 Qwindow_configuration_p
= intern ("window-configuration-p");
6848 staticpro (&Qwindow_configuration_p
);
6850 Qwindow_live_p
= intern ("window-live-p");
6851 staticpro (&Qwindow_live_p
);
6853 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
6854 staticpro (&Qtemp_buffer_show_hook
);
6856 staticpro (&Vwindow_list
);
6858 minibuf_selected_window
= Qnil
;
6859 staticpro (&minibuf_selected_window
);
6861 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
6862 doc
: /* Non-nil means call as function to display a help buffer.
6863 The function is called with one argument, the buffer to be displayed.
6864 Used by `with-output-to-temp-buffer'.
6865 If this function is used, then it must do the entire job of showing
6866 the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */);
6867 Vtemp_buffer_show_function
= Qnil
;
6869 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
6870 doc
: /* If non-nil, function to call to handle `display-buffer'.
6871 It will receive two args, the buffer and a flag which if non-nil means
6872 that the currently selected window is not acceptable.
6873 It should choose or create a window, display the specified buffer in it,
6874 and return the window.
6875 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'
6876 work using this function. */);
6877 Vdisplay_buffer_function
= Qnil
;
6879 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
6880 doc
: /* *If non-nil, `display-buffer' should even the window heights.
6881 If nil, `display-buffer' will leave the window configuration alone. */);
6882 Veven_window_heights
= Qt
;
6884 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
6885 doc
: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */);
6886 Vminibuf_scroll_window
= Qnil
;
6888 DEFVAR_BOOL ("mode-line-in-non-selected-windows", &mode_line_in_non_selected_windows
,
6889 doc
: /* Non-nil means to use `mode-line-inactive' face in non-selected windows.
6890 If the minibuffer is active, the `minibuffer-scroll-window' mode line
6891 is displayed in the `mode-line' face. */);
6892 mode_line_in_non_selected_windows
= 1;
6894 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
6895 doc
: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */);
6896 Vother_window_scroll_buffer
= Qnil
;
6898 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
6899 doc
: /* *Non-nil means `display-buffer' should make a separate frame. */);
6902 DEFVAR_BOOL ("auto-window-vscroll", &auto_window_vscroll_p
,
6903 doc
: /* *Non-nil means to automatically adjust `window-vscroll' to view tall lines. */);
6904 auto_window_vscroll_p
= 1;
6906 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
6907 doc
: /* *Non-nil means `display-buffer' should reuse frames.
6908 If the buffer in question is already displayed in a frame, raise that frame. */);
6909 display_buffer_reuse_frames
= 0;
6911 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
6912 doc
: /* Function to call to handle automatic new frame creation.
6913 It is called with no arguments and should return a newly created frame.
6915 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'
6916 where `pop-up-frame-alist' would hold the default frame parameters. */);
6917 Vpop_up_frame_function
= Qnil
;
6919 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
6920 doc
: /* *List of buffer names that should have their own special frames.
6921 Displaying a buffer with `display-buffer' or `pop-to-buffer',
6922 if its name is in this list, makes a special frame for it
6923 using `special-display-function'. See also `special-display-regexps'.
6925 An element of the list can be a list instead of just a string.
6926 There are two ways to use a list as an element:
6927 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)
6928 In the first case, the FRAME-PARAMETERS are pairs of the form
6929 \(PARAMETER . VALUE); these parameter values are used to create the frame.
6930 In the second case, FUNCTION is called with BUFFER as the first argument,
6931 followed by the OTHER-ARGS--it can display BUFFER in any way it likes.
6932 All this is done by the function found in `special-display-function'.
6934 If the specified frame parameters include (same-buffer . t), the
6935 buffer is displayed in the currently selected window. Otherwise, if
6936 they include (same-frame . t), the buffer is displayed in a new window
6937 in the currently selected frame.
6939 If this variable appears \"not to work\", because you add a name to it
6940 but that buffer still appears in the selected window, look at the
6941 values of `same-window-buffer-names' and `same-window-regexps'.
6942 Those variables take precedence over this one. */);
6943 Vspecial_display_buffer_names
= Qnil
;
6945 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
6946 doc
: /* *List of regexps saying which buffers should have their own special frames.
6947 When displaying a buffer with `display-buffer' or `pop-to-buffer',
6948 if any regexp in this list matches the buffer name, it makes a
6949 special frame for the buffer by calling `special-display-function'.
6951 An element of the list can be a list instead of just a string.
6952 There are two ways to use a list as an element:
6953 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)
6954 In the first case, the FRAME-PARAMETERS are pairs of the form
6955 \(PARAMETER . VALUE); these parameter values are used to create the frame.
6956 In the second case, FUNCTION is called with BUFFER as the first argument,
6957 followed by the OTHER-ARGS--it can display the buffer in any way it likes.
6958 All this is done by the function found in `special-display-function'.
6960 If the specified frame parameters include (same-buffer . t), the
6961 buffer is displayed in the currently selected window. Otherwise, if
6962 they include (same-frame . t), the buffer is displayed in a new window
6963 in the currently selected frame.
6965 If this variable appears \"not to work\", because you add a regexp to it
6966 but the matching buffers still appear in the selected window, look at the
6967 values of `same-window-buffer-names' and `same-window-regexps'.
6968 Those variables take precedence over this one. */);
6969 Vspecial_display_regexps
= Qnil
;
6971 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
6972 doc
: /* Function to call to make a new frame for a special buffer.
6973 It is called with two arguments, the buffer and optional buffer specific
6974 data, and should return a window displaying that buffer.
6975 The default value normally makes a separate frame for the buffer,
6976 using `special-display-frame-alist' to specify the frame parameters.
6977 But if the buffer specific data includes (same-buffer . t) then the
6978 buffer is displayed in the current selected window.
6979 Otherwise if it includes (same-frame . t) then the buffer is displayed in
6980 a new window in the currently selected frame.
6982 A buffer is special if it is listed in `special-display-buffer-names'
6983 or matches a regexp in `special-display-regexps'. */);
6984 Vspecial_display_function
= Qnil
;
6986 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
6987 doc
: /* *List of buffer names that should appear in the selected window.
6988 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'
6989 switches to it in the selected window, rather than making it appear
6990 in some other window.
6992 An element of the list can be a cons cell instead of just a string.
6993 Then the car must be a string, which specifies the buffer name.
6994 This is for compatibility with `special-display-buffer-names';
6995 the cdr of the cons cell is ignored.
6997 See also `same-window-regexps'. */);
6998 Vsame_window_buffer_names
= Qnil
;
7000 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
7001 doc
: /* *List of regexps saying which buffers should appear in the selected window.
7002 If a buffer name matches one of these regexps, then displaying it
7003 using `display-buffer' or `pop-to-buffer' switches to it
7004 in the selected window, rather than making it appear in some other window.
7006 An element of the list can be a cons cell instead of just a string.
7007 Then the car must be a string, which specifies the buffer name.
7008 This is for compatibility with `special-display-buffer-names';
7009 the cdr of the cons cell is ignored.
7011 See also `same-window-buffer-names'. */);
7012 Vsame_window_regexps
= Qnil
;
7014 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
7015 doc
: /* *Non-nil means display-buffer should make new windows. */);
7018 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
7019 doc
: /* *Number of lines of continuity when scrolling by screenfuls. */);
7020 next_screen_context_lines
= 2;
7022 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
7023 doc
: /* *A window must be at least this tall to be eligible for splitting by `display-buffer'.
7024 If there is only one window, it is split regardless of this value. */);
7025 split_height_threshold
= 500;
7027 DEFVAR_INT ("window-min-height", &window_min_height
,
7028 doc
: /* *Delete any window less than this tall (including its mode line). */);
7029 window_min_height
= 4;
7031 DEFVAR_INT ("window-min-width", &window_min_width
,
7032 doc
: /* *Delete any window less than this wide. */);
7033 window_min_width
= 10;
7035 DEFVAR_LISP ("scroll-preserve-screen-position",
7036 &Vscroll_preserve_screen_position
,
7037 doc
: /* *Controls if scroll commands move point to keep its screen line unchanged.
7038 A value of nil means point does not keep its screen position except
7039 at the scroll margin or window boundary respectively.
7040 A value of t means point keeps its screen position if the scroll
7041 command moved it vertically out of the window, e.g. when scrolling
7043 Any other value means point always keeps its screen position. */);
7044 Vscroll_preserve_screen_position
= Qnil
;
7046 DEFVAR_LISP ("window-configuration-change-hook",
7047 &Vwindow_configuration_change_hook
,
7048 doc
: /* Functions to call when window configuration changes.
7049 The selected frame is the one whose configuration has changed. */);
7050 Vwindow_configuration_change_hook
= Qnil
;
7052 defsubr (&Sselected_window
);
7053 defsubr (&Sminibuffer_window
);
7054 defsubr (&Swindow_minibuffer_p
);
7055 defsubr (&Swindowp
);
7056 defsubr (&Swindow_live_p
);
7057 defsubr (&Spos_visible_in_window_p
);
7058 defsubr (&Swindow_buffer
);
7059 defsubr (&Swindow_height
);
7060 defsubr (&Swindow_width
);
7061 defsubr (&Swindow_hscroll
);
7062 defsubr (&Sset_window_hscroll
);
7063 defsubr (&Swindow_redisplay_end_trigger
);
7064 defsubr (&Sset_window_redisplay_end_trigger
);
7065 defsubr (&Swindow_edges
);
7066 defsubr (&Swindow_pixel_edges
);
7067 defsubr (&Swindow_inside_edges
);
7068 defsubr (&Swindow_inside_pixel_edges
);
7069 defsubr (&Scoordinates_in_window_p
);
7070 defsubr (&Swindow_at
);
7071 defsubr (&Swindow_point
);
7072 defsubr (&Swindow_start
);
7073 defsubr (&Swindow_end
);
7074 defsubr (&Sset_window_point
);
7075 defsubr (&Sset_window_start
);
7076 defsubr (&Swindow_dedicated_p
);
7077 defsubr (&Sset_window_dedicated_p
);
7078 defsubr (&Swindow_display_table
);
7079 defsubr (&Sset_window_display_table
);
7080 defsubr (&Snext_window
);
7081 defsubr (&Sprevious_window
);
7082 defsubr (&Sother_window
);
7083 defsubr (&Sget_lru_window
);
7084 defsubr (&Sget_largest_window
);
7085 defsubr (&Sget_buffer_window
);
7086 defsubr (&Sdelete_other_windows
);
7087 defsubr (&Sdelete_windows_on
);
7088 defsubr (&Sreplace_buffer_in_windows
);
7089 defsubr (&Sdelete_window
);
7090 defsubr (&Sset_window_buffer
);
7091 defsubr (&Sselect_window
);
7092 defsubr (&Sspecial_display_p
);
7093 defsubr (&Ssame_window_p
);
7094 defsubr (&Sdisplay_buffer
);
7095 defsubr (&Sforce_window_update
);
7096 defsubr (&Ssplit_window
);
7097 defsubr (&Senlarge_window
);
7098 defsubr (&Sshrink_window
);
7099 defsubr (&Sscroll_up
);
7100 defsubr (&Sscroll_down
);
7101 defsubr (&Sscroll_left
);
7102 defsubr (&Sscroll_right
);
7103 defsubr (&Sother_window_for_scrolling
);
7104 defsubr (&Sscroll_other_window
);
7105 defsubr (&Sminibuffer_selected_window
);
7106 defsubr (&Srecenter
);
7107 defsubr (&Swindow_text_height
);
7108 defsubr (&Smove_to_window_line
);
7109 defsubr (&Swindow_configuration_p
);
7110 defsubr (&Swindow_configuration_frame
);
7111 defsubr (&Sset_window_configuration
);
7112 defsubr (&Scurrent_window_configuration
);
7113 defsubr (&Ssave_window_excursion
);
7114 defsubr (&Swindow_tree
);
7115 defsubr (&Sset_window_margins
);
7116 defsubr (&Swindow_margins
);
7117 defsubr (&Sset_window_fringes
);
7118 defsubr (&Swindow_fringes
);
7119 defsubr (&Sset_window_scroll_bars
);
7120 defsubr (&Swindow_scroll_bars
);
7121 defsubr (&Swindow_vscroll
);
7122 defsubr (&Sset_window_vscroll
);
7123 defsubr (&Scompare_window_configurations
);
7124 defsubr (&Swindow_list
);
7130 initial_define_key (control_x_map
, '1', "delete-other-windows");
7131 initial_define_key (control_x_map
, '2', "split-window");
7132 initial_define_key (control_x_map
, '0', "delete-window");
7133 initial_define_key (control_x_map
, 'o', "other-window");
7134 initial_define_key (control_x_map
, '^', "enlarge-window");
7135 initial_define_key (control_x_map
, '<', "scroll-left");
7136 initial_define_key (control_x_map
, '>', "scroll-right");
7138 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
7139 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
7140 initial_define_key (meta_map
, 'v', "scroll-down");
7142 initial_define_key (global_map
, Ctl('L'), "recenter");
7143 initial_define_key (meta_map
, 'r', "move-to-window-line");
7146 /* arch-tag: 90a9c576-0590-48f1-a5f1-6c96a0452d9f
7147 (do not change this comment) */