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, 2006 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
36 #include "dispextern.h"
37 #include "blockinput.h"
38 #include "intervals.h"
42 #endif /* HAVE_X_WINDOWS */
54 Lisp_Object Qwindowp
, Qwindow_live_p
, Qwindow_configuration_p
;
55 Lisp_Object Qscroll_up
, Qscroll_down
;
56 Lisp_Object Qwindow_size_fixed
;
57 extern Lisp_Object Qleft_margin
, Qright_margin
;
59 static int displayed_window_lines
P_ ((struct window
*));
60 static struct window
*decode_window
P_ ((Lisp_Object
));
61 static int count_windows
P_ ((struct window
*));
62 static int get_leaf_windows
P_ ((struct window
*, struct window
**, int));
63 static void window_scroll
P_ ((Lisp_Object
, int, int, int));
64 static void window_scroll_pixel_based
P_ ((Lisp_Object
, int, int, int));
65 static void window_scroll_line_based
P_ ((Lisp_Object
, int, int, int));
66 static int window_min_size_1
P_ ((struct window
*, int));
67 static int window_min_size
P_ ((struct window
*, int, int, int *));
68 static void size_window
P_ ((Lisp_Object
, int, int, int, int, int));
69 static int freeze_window_start
P_ ((struct window
*, void *));
70 static int window_fixed_size_p
P_ ((struct window
*, int, int));
71 static void enlarge_window
P_ ((Lisp_Object
, int, int));
72 static Lisp_Object window_list
P_ ((void));
73 static int add_window_to_list
P_ ((struct window
*, void *));
74 static int candidate_window_p
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
,
76 static Lisp_Object next_window
P_ ((Lisp_Object
, Lisp_Object
,
78 static void decode_next_window_args
P_ ((Lisp_Object
*, Lisp_Object
*,
80 static int foreach_window_1
P_ ((struct window
*,
81 int (* fn
) (struct window
*, void *),
83 static Lisp_Object window_list_1
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
));
85 /* This is the window in which the terminal's cursor should
86 be left when nothing is being done with it. This must
87 always be a leaf window, and its buffer is selected by
88 the top level editing loop at the end of each command.
90 This value is always the same as
91 FRAME_SELECTED_WINDOW (selected_frame). */
93 Lisp_Object selected_window
;
95 /* A list of all windows for use by next_window and Fwindow_list.
96 Functions creating or deleting windows should invalidate this cache
97 by setting it to nil. */
99 Lisp_Object Vwindow_list
;
101 /* The mini-buffer window of the selected frame.
102 Note that you cannot test for mini-bufferness of an arbitrary window
103 by comparing against this; but you can test for mini-bufferness of
104 the selected window. */
106 Lisp_Object minibuf_window
;
108 /* Non-nil means it is the window whose mode line should be
109 shown as the selected window when the minibuffer is selected. */
111 Lisp_Object minibuf_selected_window
;
113 /* Non-nil means it is the window for C-M-v to scroll
114 when the mini-buffer is selected. */
116 Lisp_Object Vminibuf_scroll_window
;
118 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
120 Lisp_Object Vother_window_scroll_buffer
;
122 /* Non-nil means it's function to call to display temp buffers. */
124 Lisp_Object Vtemp_buffer_show_function
;
126 /* Non-zero means line and page scrolling on tall lines (with images)
127 does partial scrolling by modifying window-vscroll. */
129 int auto_window_vscroll_p
;
131 /* Non-zero means to use mode-line-inactive face in all windows but the
132 selected-window and the minibuffer-scroll-window when the
133 minibuffer is active. */
134 int mode_line_in_non_selected_windows
;
136 /* If a window gets smaller than either of these, it is removed. */
138 EMACS_INT window_min_height
;
139 EMACS_INT window_min_width
;
141 /* Nonzero implies Fdisplay_buffer should create windows. */
145 /* Nonzero implies make new frames for Fdisplay_buffer. */
149 /* Nonzero means reuse existing frames for displaying buffers. */
151 int display_buffer_reuse_frames
;
153 /* Non-nil means use this function instead of default */
155 Lisp_Object Vpop_up_frame_function
;
157 /* Function to call to handle Fdisplay_buffer. */
159 Lisp_Object Vdisplay_buffer_function
;
161 /* Non-nil means that Fdisplay_buffer should even the heights of windows. */
163 Lisp_Object Veven_window_heights
;
165 /* List of buffer *names* for buffers that should have their own frames. */
167 Lisp_Object Vspecial_display_buffer_names
;
169 /* List of regexps for buffer names that should have their own frames. */
171 Lisp_Object Vspecial_display_regexps
;
173 /* Function to pop up a special frame. */
175 Lisp_Object Vspecial_display_function
;
177 /* List of buffer *names* for buffers to appear in selected window. */
179 Lisp_Object Vsame_window_buffer_names
;
181 /* List of regexps for buffer names to appear in selected window. */
183 Lisp_Object Vsame_window_regexps
;
185 /* Hook run at end of temp_output_buffer_show. */
187 Lisp_Object Qtemp_buffer_show_hook
;
189 /* Fdisplay_buffer always splits the largest window
190 if that window is more than this high. */
192 EMACS_INT split_height_threshold
;
194 /* Number of lines of continuity in scrolling by screenfuls. */
196 EMACS_INT next_screen_context_lines
;
198 /* Incremented for each window created. */
200 static int sequence_number
;
202 /* Nonzero after init_window_once has finished. */
204 static int window_initialized
;
206 /* Hook to run when window config changes. */
208 Lisp_Object Qwindow_configuration_change_hook
;
209 Lisp_Object Vwindow_configuration_change_hook
;
211 /* Non-nil means scroll commands try to put point
212 at the same screen height as previously. */
214 Lisp_Object Vscroll_preserve_screen_position
;
216 /* Incremented by 1 whenever a window is deleted. */
218 int window_deletion_count
;
220 /* Used by the function window_scroll_pixel_based */
222 static int window_scroll_pixel_based_preserve_y
;
224 #if 0 /* This isn't used anywhere. */
225 /* Nonzero means we can split a frame even if it is "unsplittable". */
226 static int inhibit_frame_unsplittable
;
229 extern EMACS_INT scroll_margin
;
231 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
233 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
234 doc
: /* Returns t if OBJECT is a window. */)
238 return WINDOWP (object
) ? Qt
: Qnil
;
241 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
242 doc
: /* Returns t if OBJECT is a window which is currently visible. */)
246 return WINDOW_LIVE_P (object
) ? Qt
: Qnil
;
253 register struct window
*p
;
255 p
= allocate_window ();
257 XSETFASTINT (p
->sequence_number
, sequence_number
);
258 XSETFASTINT (p
->left_col
, 0);
259 XSETFASTINT (p
->top_line
, 0);
260 XSETFASTINT (p
->total_lines
, 0);
261 XSETFASTINT (p
->total_cols
, 0);
262 XSETFASTINT (p
->hscroll
, 0);
263 XSETFASTINT (p
->min_hscroll
, 0);
264 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
265 p
->start
= Fmake_marker ();
266 p
->pointm
= Fmake_marker ();
267 XSETFASTINT (p
->use_time
, 0);
269 p
->display_table
= Qnil
;
271 p
->pseudo_window_p
= 0;
272 bzero (&p
->cursor
, sizeof (p
->cursor
));
273 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
274 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
275 p
->desired_matrix
= p
->current_matrix
= 0;
276 p
->nrows_scale_factor
= p
->ncols_scale_factor
= 1;
277 p
->phys_cursor_type
= -1;
278 p
->phys_cursor_width
= -1;
279 p
->must_be_updated_p
= 0;
280 XSETFASTINT (p
->window_end_vpos
, 0);
281 XSETFASTINT (p
->window_end_pos
, 0);
282 p
->window_end_valid
= Qnil
;
285 XSETFASTINT (p
->last_point
, 0);
286 p
->frozen_window_start_p
= 0;
287 p
->last_cursor_off_p
= p
->cursor_off_p
= 0;
288 p
->left_margin_cols
= Qnil
;
289 p
->right_margin_cols
= Qnil
;
290 p
->left_fringe_width
= Qnil
;
291 p
->right_fringe_width
= Qnil
;
292 p
->fringes_outside_margins
= Qnil
;
293 p
->scroll_bar_width
= Qnil
;
294 p
->vertical_scroll_bar_type
= Qt
;
300 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
301 doc
: /* Return the window that the cursor now appears in and commands apply to. */)
304 return selected_window
;
307 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
308 doc
: /* Return the window used now for minibuffers.
309 If the optional argument FRAME is specified, return the minibuffer window
310 used by that frame. */)
315 frame
= selected_frame
;
316 CHECK_LIVE_FRAME (frame
);
317 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
320 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
321 doc
: /* Returns non-nil if WINDOW is a minibuffer window.
322 WINDOW defaults to the selected window. */)
326 struct window
*w
= decode_window (window
);
327 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
331 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
332 Spos_visible_in_window_p
, 0, 3, 0,
333 doc
: /* Return non-nil if position POS is currently on the frame in WINDOW.
334 Return nil if that position is scrolled vertically out of view.
335 If a character is only partially visible, nil is returned, unless the
336 optional argument PARTIALLY is non-nil.
337 If POS is only out of view because of horizontal scrolling, return non-nil.
338 If POS is t, it specifies the position of the last visible glyph in WINDOW.
339 POS defaults to point in WINDOW; WINDOW defaults to the selected window.
341 If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil,
342 return value is a list of 2 or 6 elements (X Y [RTOP RBOT ROWH VPOS]),
343 where X and Y are the pixel coordinates relative to the top left corner
344 of the window. The remaining elements are omitted if the character after
345 POS is fully visible; otherwise, RTOP and RBOT are the number of pixels
346 off-window at the top and bottom of the row, ROWH is the height of the
347 display row, and VPOS is the row number (0-based) containing POS. */)
348 (pos
, window
, partially
)
349 Lisp_Object pos
, window
, partially
;
351 register struct window
*w
;
353 register struct buffer
*buf
;
355 Lisp_Object in_window
= Qnil
;
356 int rtop
, rbot
, rowh
, vpos
, fully_p
= 1;
359 w
= decode_window (window
);
360 buf
= XBUFFER (w
->buffer
);
361 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
365 else if (!NILP (pos
))
367 CHECK_NUMBER_COERCE_MARKER (pos
);
370 else if (w
== XWINDOW (selected_window
))
373 posint
= XMARKER (w
->pointm
)->charpos
;
375 /* If position is above window start or outside buffer boundaries,
376 or if window start is out of range, position is not visible. */
378 || (posint
>= CHARPOS (top
) && posint
<= BUF_ZV (buf
)))
379 && CHARPOS (top
) >= BUF_BEGV (buf
)
380 && CHARPOS (top
) <= BUF_ZV (buf
)
381 && pos_visible_p (w
, posint
, &x
, &y
, &rtop
, &rbot
, &rowh
, &vpos
)
382 && (fully_p
= !rtop
&& !rbot
, (!NILP (partially
) || fully_p
)))
385 if (!NILP (in_window
) && !NILP (partially
))
387 Lisp_Object part
= Qnil
;
389 part
= list4 (make_number (rtop
), make_number (rbot
),
390 make_number (rowh
), make_number (vpos
));
391 in_window
= Fcons (make_number (x
),
392 Fcons (make_number (y
), part
));
398 DEFUN ("window-line-height", Fwindow_line_height
,
399 Swindow_line_height
, 0, 2, 0,
400 doc
: /* Return height in pixels of text line LINE in window WINDOW.
401 If WINDOW is nil or omitted, use selected window.
403 Return height of current line if LINE is omitted or nil. Return height of
404 header or mode line if LINE is `header-line' and `mode-line'.
405 Otherwise, LINE is a text line number starting from 0. A negative number
406 counts from the end of the window.
408 Value is a list (HEIGHT VPOS YPOS OFFBOT), where HEIGHT is the height
409 in pixels of the visible part of the line, VPOS and YPOS are the
410 vertical position in lines and pixels of the line, relative to the top
411 of the first text line, and OFFBOT is the number of off-window pixels at
412 the bottom of the text line. If there are off-window pixels at the top
413 of the (first) text line, YPOS is negative.
415 Return nil if window display is not up-to-date. In that case, use
416 `pos-visible-in-window-p' to obtain the information. */)
418 Lisp_Object line
, window
;
420 register struct window
*w
;
421 register struct buffer
*b
;
422 struct glyph_row
*row
, *end_row
;
423 int max_y
, crop
, i
, n
;
425 w
= decode_window (window
);
428 || w
->pseudo_window_p
)
431 CHECK_BUFFER (w
->buffer
);
432 b
= XBUFFER (w
->buffer
);
434 /* Fail if current matrix is not up-to-date. */
435 if (NILP (w
->window_end_valid
)
436 || current_buffer
->clip_changed
437 || current_buffer
->prevent_redisplay_optimizations_p
438 || XFASTINT (w
->last_modified
) < BUF_MODIFF (b
)
439 || XFASTINT (w
->last_overlay_modified
) < BUF_OVERLAY_MODIFF (b
))
445 if (i
< 0 || i
>= w
->current_matrix
->nrows
446 || (row
= MATRIX_ROW (w
->current_matrix
, i
), !row
->enabled_p
))
448 max_y
= window_text_bottom_y (w
);
452 if (EQ (line
, Qheader_line
))
454 if (!WINDOW_WANTS_HEADER_LINE_P (w
))
456 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
459 return list4 (make_number (row
->height
),
460 make_number (0), make_number (0),
464 if (EQ (line
, Qmode_line
))
466 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
469 return list4 (make_number (row
->height
),
470 make_number (0), /* not accurate */
471 make_number (WINDOW_HEADER_LINE_HEIGHT (w
)
472 + window_text_bottom_y (w
)),
479 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
480 end_row
= MATRIX_BOTTOM_TEXT_ROW (w
->current_matrix
, w
);
481 max_y
= window_text_bottom_y (w
);
484 while ((n
< 0 || i
< n
)
485 && row
<= end_row
&& row
->enabled_p
486 && row
->y
+ row
->height
< max_y
)
489 if (row
> end_row
|| !row
->enabled_p
)
501 crop
= max (0, (row
->y
+ row
->height
) - max_y
);
502 return list4 (make_number (row
->height
+ min (0, row
->y
) - crop
),
504 make_number (row
->y
),
510 static struct window
*
511 decode_window (window
)
512 register Lisp_Object window
;
515 return XWINDOW (selected_window
);
517 CHECK_LIVE_WINDOW (window
);
518 return XWINDOW (window
);
521 static struct window
*
522 decode_any_window (window
)
523 register Lisp_Object window
;
526 return XWINDOW (selected_window
);
528 CHECK_WINDOW (window
);
529 return XWINDOW (window
);
532 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
533 doc
: /* Return the buffer that WINDOW is displaying.
534 WINDOW defaults to the selected window. */)
538 return decode_window (window
)->buffer
;
541 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
542 doc
: /* Return the number of lines in WINDOW (including its mode line). */)
546 return decode_any_window (window
)->total_lines
;
549 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
550 doc
: /* Return the number of display columns in WINDOW.
551 This is the width that is usable columns available for text in WINDOW.
552 If you want to find out how many columns WINDOW takes up,
553 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */)
557 return make_number (window_box_text_cols (decode_any_window (window
)));
560 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
561 doc
: /* Return the number of columns by which WINDOW is scrolled from left margin. */)
565 return decode_window (window
)->hscroll
;
568 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
569 doc
: /* Set number of columns WINDOW is scrolled from left margin to NCOL.
570 Return NCOL. NCOL should be zero or positive.
572 Note that if `automatic-hscrolling' is non-nil, you cannot scroll the
573 window so that the location of point moves off-window. */)
575 Lisp_Object window
, ncol
;
577 struct window
*w
= decode_window (window
);
581 hscroll
= max (0, XINT (ncol
));
583 /* Prevent redisplay shortcuts when changing the hscroll. */
584 if (XINT (w
->hscroll
) != hscroll
)
585 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
587 w
->hscroll
= make_number (hscroll
);
591 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
592 Swindow_redisplay_end_trigger
, 0, 1, 0,
593 doc
: /* Return WINDOW's redisplay end trigger value.
594 See `set-window-redisplay-end-trigger' for more information. */)
598 return decode_window (window
)->redisplay_end_trigger
;
601 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
602 Sset_window_redisplay_end_trigger
, 2, 2, 0,
603 doc
: /* Set WINDOW's redisplay end trigger value to VALUE.
604 VALUE should be a buffer position (typically a marker) or nil.
605 If it is a buffer position, then if redisplay in WINDOW reaches a position
606 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
607 with two arguments: WINDOW, and the end trigger value.
608 Afterwards the end-trigger value is reset to nil. */)
610 register Lisp_Object window
, value
;
612 register struct window
*w
;
614 w
= decode_window (window
);
615 w
->redisplay_end_trigger
= value
;
619 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
620 doc
: /* Return a list of the edge coordinates of WINDOW.
621 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
622 RIGHT is one more than the rightmost column occupied by WINDOW,
623 and BOTTOM is one more than the bottommost row occupied by WINDOW.
624 The edges include the space used by the window's scroll bar,
625 display margins, fringes, header line, and mode line, if it has them.
626 To get the edges of the actual text area, use `window-inside-edges'. */)
630 register struct window
*w
= decode_any_window (window
);
632 return Fcons (make_number (WINDOW_LEFT_EDGE_COL (w
)),
633 Fcons (make_number (WINDOW_TOP_EDGE_LINE (w
)),
634 Fcons (make_number (WINDOW_RIGHT_EDGE_COL (w
)),
635 Fcons (make_number (WINDOW_BOTTOM_EDGE_LINE (w
)),
639 DEFUN ("window-pixel-edges", Fwindow_pixel_edges
, Swindow_pixel_edges
, 0, 1, 0,
640 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
641 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
642 RIGHT is one more than the rightmost x position occupied by WINDOW,
643 and BOTTOM is one more than the bottommost y position occupied by WINDOW.
644 The pixel edges include the space used by the window's scroll bar,
645 display margins, fringes, header line, and mode line, if it has them.
646 To get the edges of the actual text area, use `window-inside-pixel-edges'. */)
650 register struct window
*w
= decode_any_window (window
);
652 return Fcons (make_number (WINDOW_LEFT_EDGE_X (w
)),
653 Fcons (make_number (WINDOW_TOP_EDGE_Y (w
)),
654 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w
)),
655 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w
)),
659 DEFUN ("window-inside-edges", Fwindow_inside_edges
, Swindow_inside_edges
, 0, 1, 0,
660 doc
: /* Return a list of the edge coordinates of WINDOW.
661 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
662 RIGHT is one more than the rightmost column used by text in WINDOW,
663 and BOTTOM is one more than the bottommost row used by text in WINDOW.
664 The inside edges do not include the space used by the window's scroll bar,
665 display margins, fringes, header line, and/or mode line. */)
669 register struct window
*w
= decode_any_window (window
);
671 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_COL (w
)
672 + WINDOW_LEFT_MARGIN_COLS (w
)
673 + WINDOW_LEFT_FRINGE_COLS (w
)),
674 make_number (WINDOW_TOP_EDGE_LINE (w
)
675 + WINDOW_HEADER_LINE_LINES (w
)),
676 make_number (WINDOW_BOX_RIGHT_EDGE_COL (w
)
677 - WINDOW_RIGHT_MARGIN_COLS (w
)
678 - WINDOW_RIGHT_FRINGE_COLS (w
)),
679 make_number (WINDOW_BOTTOM_EDGE_LINE (w
)
680 - WINDOW_MODE_LINE_LINES (w
)));
683 DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges
, Swindow_inside_pixel_edges
, 0, 1, 0,
684 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
685 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
686 RIGHT is one more than the rightmost x position used by text in WINDOW,
687 and BOTTOM is one more than the bottommost y position used by text in WINDOW.
688 The inside edges do not include the space used by the window's scroll bar,
689 display margins, fringes, header line, and/or mode line. */)
693 register struct window
*w
= decode_any_window (window
);
695 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w
)
696 + WINDOW_LEFT_MARGIN_WIDTH (w
)
697 + WINDOW_LEFT_FRINGE_WIDTH (w
)),
698 make_number (WINDOW_TOP_EDGE_Y (w
)
699 + WINDOW_HEADER_LINE_HEIGHT (w
)),
700 make_number (WINDOW_BOX_RIGHT_EDGE_X (w
)
701 - WINDOW_RIGHT_MARGIN_WIDTH (w
)
702 - WINDOW_RIGHT_FRINGE_WIDTH (w
)),
703 make_number (WINDOW_BOTTOM_EDGE_Y (w
)
704 - WINDOW_MODE_LINE_HEIGHT (w
)));
707 /* Test if the character at column *X, row *Y is within window W.
708 If it is not, return ON_NOTHING;
709 if it is in the window's text area,
710 set *x and *y to its location relative to the upper left corner
713 if it is on the window's modeline, return ON_MODE_LINE;
714 if it is on the border between the window and its right sibling,
715 return ON_VERTICAL_BORDER.
716 if it is on a scroll bar,
717 return ON_SCROLL_BAR.
718 if it is on the window's top line, return ON_HEADER_LINE;
719 if it is in left or right fringe of the window,
720 return ON_LEFT_FRINGE or ON_RIGHT_FRINGE, and convert *X and *Y
721 to window-relative coordinates;
722 if it is in the marginal area to the left/right of the window,
723 return ON_LEFT_MARGIN or ON_RIGHT_MARGIN, and convert *X and *Y
724 to window-relative coordinates.
726 X and Y are frame relative pixel coordinates. */
728 static enum window_part
729 coordinates_in_window (w
, x
, y
)
730 register struct window
*w
;
733 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
734 int left_x
, right_x
, top_y
, bottom_y
;
735 enum window_part part
;
736 int ux
= FRAME_COLUMN_WIDTH (f
);
737 int x0
= WINDOW_LEFT_EDGE_X (w
);
738 int x1
= WINDOW_RIGHT_EDGE_X (w
);
739 /* The width of the area where the vertical line can be dragged.
740 (Between mode lines for instance. */
741 int grabbable_width
= ux
;
742 int lmargin_width
, rmargin_width
, text_left
, text_right
;
744 /* In what's below, we subtract 1 when computing right_x because we
745 want the rightmost pixel, which is given by left_pixel+width-1. */
746 if (w
->pseudo_window_p
)
749 right_x
= WINDOW_TOTAL_WIDTH (w
) - 1;
750 top_y
= WINDOW_TOP_EDGE_Y (w
);
751 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
755 left_x
= WINDOW_BOX_LEFT_EDGE_X (w
);
756 right_x
= WINDOW_BOX_RIGHT_EDGE_X (w
) - 1;
757 top_y
= WINDOW_TOP_EDGE_Y (w
);
758 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
761 /* Outside any interesting row? */
762 if (*y
< top_y
|| *y
>= bottom_y
)
765 /* On the mode line or header line? If it's near the start of
766 the mode or header line of window that's has a horizontal
767 sibling, say it's on the vertical line. That's to be able
768 to resize windows horizontally in case we're using toolkit
771 if (WINDOW_WANTS_MODELINE_P (w
)
772 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
))
776 header_vertical_border_check
:
777 /* We're somewhere on the mode line. We consider the place
778 between mode lines of horizontally adjacent mode lines
779 as the vertical border. If scroll bars on the left,
780 return the right window. */
781 if (WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w
)
782 || WINDOW_RIGHTMOST_P (w
))
784 if (!WINDOW_LEFTMOST_P (w
) && abs (*x
- x0
) < grabbable_width
)
786 /* Convert X and Y to window relative coordinates.
787 Vertical border is at the left edge of window. */
788 *x
= max (0, *x
- x0
);
790 return ON_VERTICAL_BORDER
;
795 if (abs (*x
- x1
) < grabbable_width
)
797 /* Convert X and Y to window relative coordinates.
798 Vertical border is at the right edge of window. */
799 *x
= min (x1
, *x
) - x0
;
801 return ON_VERTICAL_BORDER
;
805 if (*x
< x0
|| *x
>= x1
)
808 /* Convert X and Y to window relative coordinates.
809 Mode line starts at left edge of window. */
815 if (WINDOW_WANTS_HEADER_LINE_P (w
)
816 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
))
818 part
= ON_HEADER_LINE
;
819 goto header_vertical_border_check
;
822 if (*x
< x0
|| *x
>= x1
)
825 /* Outside any interesting column? */
826 if (*x
< left_x
|| *x
> right_x
)
829 return ON_SCROLL_BAR
;
832 lmargin_width
= window_box_width (w
, LEFT_MARGIN_AREA
);
833 rmargin_width
= window_box_width (w
, RIGHT_MARGIN_AREA
);
835 text_left
= window_box_left (w
, TEXT_AREA
);
836 text_right
= text_left
+ window_box_width (w
, TEXT_AREA
);
838 if (FRAME_WINDOW_P (f
))
840 if (!w
->pseudo_window_p
841 && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w
)
842 && !WINDOW_RIGHTMOST_P (w
)
843 && (abs (*x
- right_x
) < grabbable_width
))
845 /* Convert X and Y to window relative coordinates.
846 Vertical border is at the right edge of window. */
847 *x
= min (right_x
, *x
) - left_x
;
849 return ON_VERTICAL_BORDER
;
854 /* Need to say "*x > right_x" rather than >=, since on character
855 terminals, the vertical line's x coordinate is right_x. */
856 if (!w
->pseudo_window_p
857 && !WINDOW_RIGHTMOST_P (w
)
858 && *x
> right_x
- ux
)
860 /* On the border on the right side of the window? Assume that
861 this area begins at RIGHT_X minus a canonical char width. */
862 *x
= min (right_x
, *x
) - left_x
;
864 return ON_VERTICAL_BORDER
;
870 if (lmargin_width
> 0
871 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
872 ? (*x
>= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
))
873 : (*x
< left_x
+ lmargin_width
)))
876 if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
877 *x
-= WINDOW_LEFT_FRINGE_WIDTH (w
);
879 return ON_LEFT_MARGIN
;
882 /* Convert X and Y to window-relative pixel coordinates. */
885 return ON_LEFT_FRINGE
;
888 if (*x
>= text_right
)
890 if (rmargin_width
> 0
891 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
892 ? (*x
< right_x
- WINDOW_RIGHT_FRINGE_WIDTH (w
))
893 : (*x
>= right_x
- rmargin_width
)))
895 *x
-= right_x
- rmargin_width
;
896 if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
897 *x
+= WINDOW_RIGHT_FRINGE_WIDTH (w
);
899 return ON_RIGHT_MARGIN
;
902 /* Convert X and Y to window-relative pixel coordinates. */
903 *x
-= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
);
905 return ON_RIGHT_FRINGE
;
908 /* Everything special ruled out - must be on text area */
915 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
916 Scoordinates_in_window_p
, 2, 2, 0,
917 doc
: /* Return non-nil if COORDINATES are in WINDOW.
918 COORDINATES is a cons of the form (X . Y), X and Y being distances
919 measured in characters from the upper-left corner of the frame.
920 \(0 . 0) denotes the character in the upper left corner of the
922 If COORDINATES are in the text portion of WINDOW,
923 the coordinates relative to the window are returned.
924 If they are in the mode line of WINDOW, `mode-line' is returned.
925 If they are in the top mode line of WINDOW, `header-line' is returned.
926 If they are in the left fringe of WINDOW, `left-fringe' is returned.
927 If they are in the right fringe of WINDOW, `right-fringe' is returned.
928 If they are on the border between WINDOW and its right sibling,
929 `vertical-line' is returned.
930 If they are in the windows's left or right marginal areas, `left-margin'\n\
931 or `right-margin' is returned. */)
932 (coordinates
, window
)
933 register Lisp_Object coordinates
, window
;
940 CHECK_WINDOW (window
);
941 w
= XWINDOW (window
);
942 f
= XFRAME (w
->frame
);
943 CHECK_CONS (coordinates
);
944 lx
= Fcar (coordinates
);
945 ly
= Fcdr (coordinates
);
946 CHECK_NUMBER_OR_FLOAT (lx
);
947 CHECK_NUMBER_OR_FLOAT (ly
);
948 x
= FRAME_PIXEL_X_FROM_CANON_X (f
, lx
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
949 y
= FRAME_PIXEL_Y_FROM_CANON_Y (f
, ly
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
951 switch (coordinates_in_window (w
, &x
, &y
))
957 /* X and Y are now window relative pixel coordinates. Convert
958 them to canonical char units before returning them. */
959 return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f
, x
),
960 FRAME_CANON_Y_FROM_PIXEL_Y (f
, y
));
965 case ON_VERTICAL_BORDER
:
966 return Qvertical_line
;
974 case ON_RIGHT_FRINGE
:
975 return Qright_fringe
;
980 case ON_RIGHT_MARGIN
:
981 return Qright_margin
;
984 /* Historically we are supposed to return nil in this case. */
993 /* Callback for foreach_window, used in window_from_coordinates.
994 Check if window W contains coordinates specified by USER_DATA which
995 is actually a pointer to a struct check_window_data CW.
997 Check if window W contains coordinates *CW->x and *CW->y. If it
998 does, return W in *CW->window, as Lisp_Object, and return in
999 *CW->part the part of the window under coordinates *X,*Y. Return
1000 zero from this function to stop iterating over windows. */
1002 struct check_window_data
1004 Lisp_Object
*window
;
1006 enum window_part
*part
;
1010 check_window_containing (w
, user_data
)
1014 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
1015 enum window_part found
;
1018 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
1019 if (found
!= ON_NOTHING
)
1022 XSETWINDOW (*cw
->window
, w
);
1030 /* Find the window containing frame-relative pixel position X/Y and
1031 return it as a Lisp_Object.
1033 If X, Y is on one of the window's special `window_part' elements,
1034 set *PART to the id of that element, and return X and Y converted
1035 to window relative coordinates in WX and WY.
1037 If there is no window under X, Y return nil and leave *PART
1038 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
1040 This function was previously implemented with a loop cycling over
1041 windows with Fnext_window, and starting with the frame's selected
1042 window. It turned out that this doesn't work with an
1043 implementation of next_window using Vwindow_list, because
1044 FRAME_SELECTED_WINDOW (F) is not always contained in the window
1045 tree of F when this function is called asynchronously from
1046 note_mouse_highlight. The original loop didn't terminate in this
1050 window_from_coordinates (f
, x
, y
, part
, wx
, wy
, tool_bar_p
)
1053 enum window_part
*part
;
1058 struct check_window_data cw
;
1059 enum window_part dummy
;
1065 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
1066 foreach_window (f
, check_window_containing
, &cw
);
1068 /* If not found above, see if it's in the tool bar window, if a tool
1072 && WINDOWP (f
->tool_bar_window
)
1073 && WINDOW_TOTAL_LINES (XWINDOW (f
->tool_bar_window
)) > 0
1074 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
)
1078 window
= f
->tool_bar_window
;
1087 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
1088 doc
: /* Return window containing coordinates X and Y on FRAME.
1089 If omitted, FRAME defaults to the currently selected frame.
1090 The top left corner of the frame is considered to be row 0,
1093 Lisp_Object x
, y
, frame
;
1098 frame
= selected_frame
;
1099 CHECK_LIVE_FRAME (frame
);
1102 /* Check that arguments are integers or floats. */
1103 CHECK_NUMBER_OR_FLOAT (x
);
1104 CHECK_NUMBER_OR_FLOAT (y
);
1106 return window_from_coordinates (f
,
1107 (FRAME_PIXEL_X_FROM_CANON_X (f
, x
)
1108 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
1109 (FRAME_PIXEL_Y_FROM_CANON_Y (f
, y
)
1110 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
1114 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
1115 doc
: /* Return current value of point in WINDOW.
1116 For a nonselected window, this is the value point would have
1117 if that window were selected.
1119 Note that, when WINDOW is the selected window and its buffer
1120 is also currently selected, the value returned is the same as (point).
1121 It would be more strictly correct to return the `top-level' value
1122 of point, outside of any save-excursion forms.
1123 But that is hard to define. */)
1127 register struct window
*w
= decode_window (window
);
1129 if (w
== XWINDOW (selected_window
)
1130 && current_buffer
== XBUFFER (w
->buffer
))
1132 return Fmarker_position (w
->pointm
);
1135 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
1136 doc
: /* Return position at which display currently starts in WINDOW.
1137 This is updated by redisplay or by calling `set-window-start'. */)
1141 return Fmarker_position (decode_window (window
)->start
);
1144 /* This is text temporarily removed from the doc string below.
1146 This function returns nil if the position is not currently known.
1147 That happens when redisplay is preempted and doesn't finish.
1148 If in that case you want to compute where the end of the window would
1149 have been if redisplay had finished, do this:
1151 (goto-char (window-start window))
1152 (vertical-motion (1- (window-height window)) window)
1155 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
1156 doc
: /* Return position at which display currently ends in WINDOW.
1157 This is updated by redisplay, when it runs to completion.
1158 Simply changing the buffer text or setting `window-start'
1159 does not update this value.
1160 Return nil if there is no recorded value. \(This can happen if the
1161 last redisplay of WINDOW was preempted, and did not finish.)
1162 If UPDATE is non-nil, compute the up-to-date position
1163 if it isn't already recorded. */)
1165 Lisp_Object window
, update
;
1168 struct window
*w
= decode_window (window
);
1176 #if 0 /* This change broke some things. We should make it later. */
1177 /* If we don't know the end position, return nil.
1178 The user can compute it with vertical-motion if he wants to.
1179 It would be nicer to do it automatically,
1180 but that's so slow that it would probably bother people. */
1181 if (NILP (w
->window_end_valid
))
1186 && ! (! NILP (w
->window_end_valid
)
1187 && XFASTINT (w
->last_modified
) >= BUF_MODIFF (b
))
1190 struct text_pos startp
;
1192 struct buffer
*old_buffer
= NULL
;
1194 /* Cannot use Fvertical_motion because that function doesn't
1195 cope with variable-height lines. */
1196 if (b
!= current_buffer
)
1198 old_buffer
= current_buffer
;
1199 set_buffer_internal (b
);
1202 /* In case W->start is out of the range, use something
1203 reasonable. This situation occurred when loading a file with
1204 `-l' containing a call to `rmail' with subsequent other
1205 commands. At the end, W->start happened to be BEG, while
1206 rmail had already narrowed the buffer. */
1207 if (XMARKER (w
->start
)->charpos
< BEGV
)
1208 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
1209 else if (XMARKER (w
->start
)->charpos
> ZV
)
1210 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
1212 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
1214 start_display (&it
, w
, startp
);
1215 move_it_vertically (&it
, window_box_height (w
));
1216 if (it
.current_y
< it
.last_visible_y
)
1217 move_it_past_eol (&it
);
1218 value
= make_number (IT_CHARPOS (it
));
1221 set_buffer_internal (old_buffer
);
1224 XSETINT (value
, BUF_Z (b
) - XFASTINT (w
->window_end_pos
));
1229 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
1230 doc
: /* Make point value in WINDOW be at position POS in WINDOW's buffer.
1233 Lisp_Object window
, pos
;
1235 register struct window
*w
= decode_window (window
);
1237 CHECK_NUMBER_COERCE_MARKER (pos
);
1238 if (w
== XWINDOW (selected_window
)
1239 && XBUFFER (w
->buffer
) == current_buffer
)
1242 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
1244 /* We have to make sure that redisplay updates the window to show
1245 the new value of point. */
1246 if (!EQ (window
, selected_window
))
1247 ++windows_or_buffers_changed
;
1252 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
1253 doc
: /* Make display in WINDOW start at position POS in WINDOW's buffer.
1255 Optional third arg NOFORCE non-nil inhibits next redisplay
1256 from overriding motion of point in order to display at this exact start. */)
1257 (window
, pos
, noforce
)
1258 Lisp_Object window
, pos
, noforce
;
1260 register struct window
*w
= decode_window (window
);
1262 CHECK_NUMBER_COERCE_MARKER (pos
);
1263 set_marker_restricted (w
->start
, pos
, w
->buffer
);
1264 /* this is not right, but much easier than doing what is right. */
1265 w
->start_at_line_beg
= Qnil
;
1267 w
->force_start
= Qt
;
1268 w
->update_mode_line
= Qt
;
1269 XSETFASTINT (w
->last_modified
, 0);
1270 XSETFASTINT (w
->last_overlay_modified
, 0);
1271 if (!EQ (window
, selected_window
))
1272 windows_or_buffers_changed
++;
1277 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
1279 doc
: /* Return WINDOW's dedicated object, usually t or nil.
1280 See also `set-window-dedicated-p'. */)
1284 return decode_window (window
)->dedicated
;
1287 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
1288 Sset_window_dedicated_p
, 2, 2, 0,
1289 doc
: /* Control whether WINDOW is dedicated to the buffer it displays.
1290 If it is dedicated, Emacs will not automatically change
1291 which buffer appears in it.
1292 The second argument is the new value for the dedication flag;
1293 non-nil means yes. */)
1295 Lisp_Object window
, arg
;
1297 register struct window
*w
= decode_window (window
);
1301 return w
->dedicated
;
1304 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1306 doc
: /* Return the display-table that WINDOW is using. */)
1310 return decode_window (window
)->display_table
;
1313 /* Get the display table for use on window W. This is either W's
1314 display table or W's buffer's display table. Ignore the specified
1315 tables if they are not valid; if no valid table is specified,
1318 struct Lisp_Char_Table
*
1319 window_display_table (w
)
1322 struct Lisp_Char_Table
*dp
= NULL
;
1324 if (DISP_TABLE_P (w
->display_table
))
1325 dp
= XCHAR_TABLE (w
->display_table
);
1326 else if (BUFFERP (w
->buffer
))
1328 struct buffer
*b
= XBUFFER (w
->buffer
);
1330 if (DISP_TABLE_P (b
->display_table
))
1331 dp
= XCHAR_TABLE (b
->display_table
);
1332 else if (DISP_TABLE_P (Vstandard_display_table
))
1333 dp
= XCHAR_TABLE (Vstandard_display_table
);
1339 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1340 doc
: /* Set WINDOW's display-table to TABLE. */)
1342 register Lisp_Object window
, table
;
1344 register struct window
*w
;
1346 w
= decode_window (window
);
1347 w
->display_table
= table
;
1351 /* Record info on buffer window w is displaying
1352 when it is about to cease to display that buffer. */
1355 register struct window
*w
;
1362 if (b
!= XMARKER (w
->pointm
)->buffer
)
1366 if (w
== XWINDOW (selected_window
)
1367 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1368 /* Do this except when the selected window's buffer
1369 is being removed from some other window. */
1371 /* last_window_start records the start position that this buffer
1372 had in the last window to be disconnected from it.
1373 Now that this statement is unconditional,
1374 it is possible for the buffer to be displayed in the
1375 selected window, while last_window_start reflects another
1376 window which was recently showing the same buffer.
1377 Some people might say that might be a good thing. Let's see. */
1378 b
->last_window_start
= marker_position (w
->start
);
1380 /* Point in the selected window's buffer
1381 is actually stored in that buffer, and the window's pointm isn't used.
1382 So don't clobber point in that buffer. */
1383 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1384 /* This line helps to fix Horsley's testbug.el bug. */
1385 && !(WINDOWP (b
->last_selected_window
)
1386 && w
!= XWINDOW (b
->last_selected_window
)
1387 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1388 temp_set_point_both (b
,
1389 clip_to_bounds (BUF_BEGV (b
),
1390 XMARKER (w
->pointm
)->charpos
,
1392 clip_to_bounds (BUF_BEGV_BYTE (b
),
1393 marker_byte_position (w
->pointm
),
1396 if (WINDOWP (b
->last_selected_window
)
1397 && w
== XWINDOW (b
->last_selected_window
))
1398 b
->last_selected_window
= Qnil
;
1401 /* Put replacement into the window structure in place of old. */
1403 replace_window (old
, replacement
)
1404 Lisp_Object old
, replacement
;
1406 register Lisp_Object tem
;
1407 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1409 /* If OLD is its frame's root_window, then replacement is the new
1410 root_window for that frame. */
1412 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1413 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1415 p
->left_col
= o
->left_col
;
1416 p
->top_line
= o
->top_line
;
1417 p
->total_cols
= o
->total_cols
;
1418 p
->total_lines
= o
->total_lines
;
1419 p
->desired_matrix
= p
->current_matrix
= 0;
1421 bzero (&p
->cursor
, sizeof (p
->cursor
));
1422 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1423 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1424 p
->phys_cursor_type
= -1;
1425 p
->phys_cursor_width
= -1;
1426 p
->must_be_updated_p
= 0;
1427 p
->pseudo_window_p
= 0;
1428 XSETFASTINT (p
->window_end_vpos
, 0);
1429 XSETFASTINT (p
->window_end_pos
, 0);
1430 p
->window_end_valid
= Qnil
;
1431 p
->frozen_window_start_p
= 0;
1432 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
1434 p
->next
= tem
= o
->next
;
1436 XWINDOW (tem
)->prev
= replacement
;
1438 p
->prev
= tem
= o
->prev
;
1440 XWINDOW (tem
)->next
= replacement
;
1442 p
->parent
= tem
= o
->parent
;
1445 if (EQ (XWINDOW (tem
)->vchild
, old
))
1446 XWINDOW (tem
)->vchild
= replacement
;
1447 if (EQ (XWINDOW (tem
)->hchild
, old
))
1448 XWINDOW (tem
)->hchild
= replacement
;
1451 /*** Here, if replacement is a vertical combination
1452 and so is its new parent, we should make replacement's
1453 children be children of that parent instead. ***/
1456 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1457 doc
: /* Remove WINDOW from the display. Default is selected window. */)
1459 register Lisp_Object window
;
1461 delete_window (window
);
1463 if (! NILP (Vwindow_configuration_change_hook
)
1464 && ! NILP (Vrun_hooks
))
1465 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1471 delete_window (window
)
1472 register Lisp_Object window
;
1474 register Lisp_Object tem
, parent
, sib
;
1475 register struct window
*p
;
1476 register struct window
*par
;
1479 /* Because this function is called by other C code on non-leaf
1480 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1481 so we can't decode_window here. */
1483 window
= selected_window
;
1485 CHECK_WINDOW (window
);
1486 p
= XWINDOW (window
);
1488 /* It's a no-op to delete an already-deleted window. */
1489 if (NILP (p
->buffer
)
1491 && NILP (p
->vchild
))
1496 error ("Attempt to delete minibuffer or sole ordinary window");
1497 par
= XWINDOW (parent
);
1499 windows_or_buffers_changed
++;
1500 Vwindow_list
= Qnil
;
1501 f
= XFRAME (WINDOW_FRAME (p
));
1502 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1504 /* Are we trying to delete any frame's selected window? */
1506 Lisp_Object swindow
, pwindow
;
1508 /* See if the frame's selected window is either WINDOW
1509 or any subwindow of it, by finding all that window's parents
1510 and comparing each one with WINDOW. */
1511 swindow
= FRAME_SELECTED_WINDOW (f
);
1516 while (!NILP (pwindow
))
1518 if (EQ (window
, pwindow
))
1520 pwindow
= XWINDOW (pwindow
)->parent
;
1523 /* If the window being deleted is not a parent of SWINDOW,
1524 then SWINDOW is ok as the new selected window. */
1525 if (!EQ (window
, pwindow
))
1527 /* Otherwise, try another window for SWINDOW. */
1528 swindow
= Fnext_window (swindow
, Qlambda
, Qnil
);;
1530 /* If we get back to the frame's selected window,
1531 it means there was no acceptable alternative,
1532 so we cannot delete. */
1533 if (EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1534 error ("Cannot delete window");
1537 /* If we need to change SWINDOW, do it. */
1538 if (! EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1540 /* If we're about to delete the selected window on the
1541 selected frame, then we should use Fselect_window to select
1542 the new window. On the other hand, if we're about to
1543 delete the selected window on any other frame, we shouldn't do
1544 anything but set the frame's selected_window slot. */
1545 if (EQ (FRAME_SELECTED_WINDOW (f
), selected_window
))
1546 Fselect_window (swindow
, Qnil
);
1548 FRAME_SELECTED_WINDOW (f
) = swindow
;
1552 /* Now we know we can delete this one. */
1553 window_deletion_count
++;
1556 /* tem is null for dummy parent windows
1557 (which have inferiors but not any contents themselves) */
1561 unchain_marker (XMARKER (p
->pointm
));
1562 unchain_marker (XMARKER (p
->start
));
1565 /* Free window glyph matrices. It is sure that they are allocated
1566 again when ADJUST_GLYPHS is called. Block input so that expose
1567 events and other events that access glyph matrices are not
1568 processed while we are changing them. */
1570 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1574 XWINDOW (tem
)->prev
= p
->prev
;
1578 XWINDOW (tem
)->next
= p
->next
;
1580 if (EQ (window
, par
->hchild
))
1581 par
->hchild
= p
->next
;
1582 if (EQ (window
, par
->vchild
))
1583 par
->vchild
= p
->next
;
1585 /* Find one of our siblings to give our space to. */
1589 /* If p gives its space to its next sibling, that sibling needs
1590 to have its top/left side pulled back to where p's is.
1591 set_window_{height,width} will re-position the sibling's
1594 XWINDOW (sib
)->top_line
= p
->top_line
;
1595 XWINDOW (sib
)->left_col
= p
->left_col
;
1598 /* Stretch that sibling. */
1599 if (!NILP (par
->vchild
))
1600 set_window_height (sib
,
1601 XFASTINT (XWINDOW (sib
)->total_lines
) + XFASTINT (p
->total_lines
),
1603 if (!NILP (par
->hchild
))
1604 set_window_width (sib
,
1605 XFASTINT (XWINDOW (sib
)->total_cols
) + XFASTINT (p
->total_cols
),
1608 /* If parent now has only one child,
1609 put the child into the parent's place. */
1613 if (NILP (XWINDOW (tem
)->next
)) {
1614 replace_window (parent
, tem
);
1615 par
= XWINDOW (tem
);
1618 /* Since we may be deleting combination windows, we must make sure that
1619 not only p but all its children have been marked as deleted. */
1620 if (! NILP (p
->hchild
))
1621 delete_all_subwindows (XWINDOW (p
->hchild
));
1622 else if (! NILP (p
->vchild
))
1623 delete_all_subwindows (XWINDOW (p
->vchild
));
1625 /* Mark this window as deleted. */
1626 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1628 if (! NILP (par
->parent
))
1629 par
= XWINDOW (par
->parent
);
1631 /* Check if we have a v/hchild with a v/hchild. In that case remove
1634 if (! NILP (par
->vchild
) && ! NILP (XWINDOW (par
->vchild
)->vchild
))
1636 p
= XWINDOW (par
->vchild
);
1637 par
->vchild
= p
->vchild
;
1640 else if (! NILP (par
->hchild
) && ! NILP (XWINDOW (par
->hchild
)->hchild
))
1642 p
= XWINDOW (par
->hchild
);
1643 par
->hchild
= p
->hchild
;
1651 while (! NILP (tem
)) {
1652 XWINDOW (tem
)->parent
= p
->parent
;
1653 if (NILP (XWINDOW (tem
)->next
))
1655 tem
= XWINDOW (tem
)->next
;
1658 /* The next of the v/hchild we are removing is now the next of the
1659 last child for the v/hchild:
1660 Before v/hchild -> v/hchild -> next1 -> next2
1663 After: v/hchild -> next1 -> next2 -> next3
1665 XWINDOW (tem
)->next
= p
->next
;
1666 if (! NILP (p
->next
))
1667 XWINDOW (p
->next
)->prev
= tem
;
1669 p
->next
= p
->prev
= p
->vchild
= p
->hchild
= p
->buffer
= Qnil
;
1673 /* Adjust glyph matrices. */
1680 /***********************************************************************
1682 ***********************************************************************/
1684 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1685 pointer. This is a callback function for foreach_window, used in
1686 function window_list. */
1689 add_window_to_list (w
, user_data
)
1693 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1695 XSETWINDOW (window
, w
);
1696 *list
= Fcons (window
, *list
);
1701 /* Return a list of all windows, for use by next_window. If
1702 Vwindow_list is a list, return that list. Otherwise, build a new
1703 list, cache it in Vwindow_list, and return that. */
1708 if (!CONSP (Vwindow_list
))
1712 Vwindow_list
= Qnil
;
1713 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1715 Lisp_Object args
[2];
1717 /* We are visiting windows in canonical order, and add
1718 new windows at the front of args[1], which means we
1719 have to reverse this list at the end. */
1721 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1722 args
[0] = Vwindow_list
;
1723 args
[1] = Fnreverse (args
[1]);
1724 Vwindow_list
= Fnconc (2, args
);
1728 return Vwindow_list
;
1732 /* Value is non-zero if WINDOW satisfies the constraints given by
1733 OWINDOW, MINIBUF and ALL_FRAMES.
1735 MINIBUF t means WINDOW may be minibuffer windows.
1736 `lambda' means WINDOW may not be a minibuffer window.
1737 a window means a specific minibuffer window
1739 ALL_FRAMES t means search all frames,
1740 nil means search just current frame,
1741 `visible' means search just visible frames,
1742 0 means search visible and iconified frames,
1743 a window means search the frame that window belongs to,
1744 a frame means consider windows on that frame, only. */
1747 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1748 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1750 struct window
*w
= XWINDOW (window
);
1751 struct frame
*f
= XFRAME (w
->frame
);
1752 int candidate_p
= 1;
1754 if (!BUFFERP (w
->buffer
))
1756 else if (MINI_WINDOW_P (w
)
1757 && (EQ (minibuf
, Qlambda
)
1758 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1760 /* If MINIBUF is `lambda' don't consider any mini-windows.
1761 If it is a window, consider only that one. */
1764 else if (EQ (all_frames
, Qt
))
1766 else if (NILP (all_frames
))
1768 xassert (WINDOWP (owindow
));
1769 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1771 else if (EQ (all_frames
, Qvisible
))
1773 FRAME_SAMPLE_VISIBILITY (f
);
1774 candidate_p
= FRAME_VISIBLE_P (f
);
1776 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1778 FRAME_SAMPLE_VISIBILITY (f
);
1779 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1781 else if (WINDOWP (all_frames
))
1782 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1783 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1784 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1785 else if (FRAMEP (all_frames
))
1786 candidate_p
= EQ (all_frames
, w
->frame
);
1792 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1793 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1797 decode_next_window_args (window
, minibuf
, all_frames
)
1798 Lisp_Object
*window
, *minibuf
, *all_frames
;
1801 *window
= selected_window
;
1803 CHECK_LIVE_WINDOW (*window
);
1805 /* MINIBUF nil may or may not include minibuffers. Decide if it
1807 if (NILP (*minibuf
))
1808 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1809 else if (!EQ (*minibuf
, Qt
))
1812 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1813 => count none of them, or a specific minibuffer window (the
1814 active one) to count. */
1816 /* ALL_FRAMES nil doesn't specify which frames to include. */
1817 if (NILP (*all_frames
))
1818 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1819 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1821 else if (EQ (*all_frames
, Qvisible
))
1823 else if (EQ (*all_frames
, make_number (0)))
1825 else if (FRAMEP (*all_frames
))
1827 else if (!EQ (*all_frames
, Qt
))
1830 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1831 search just current frame, `visible' meaning search just visible
1832 frames, 0 meaning search visible and iconified frames, or a
1833 window, meaning search the frame that window belongs to, or a
1834 frame, meaning consider windows on that frame, only. */
1838 /* Return the next or previous window of WINDOW in canonical ordering
1839 of windows. NEXT_P non-zero means return the next window. See the
1840 documentation string of next-window for the meaning of MINIBUF and
1844 next_window (window
, minibuf
, all_frames
, next_p
)
1845 Lisp_Object window
, minibuf
, all_frames
;
1848 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1850 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1851 return the first window on the frame. */
1852 if (FRAMEP (all_frames
)
1853 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1854 return Fframe_first_window (all_frames
);
1860 /* Find WINDOW in the list of all windows. */
1861 list
= Fmemq (window
, window_list ());
1863 /* Scan forward from WINDOW to the end of the window list. */
1865 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1866 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1869 /* Scan from the start of the window list up to WINDOW. */
1871 for (list
= Vwindow_list
;
1872 CONSP (list
) && !EQ (XCAR (list
), window
);
1874 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1878 window
= XCAR (list
);
1882 Lisp_Object candidate
, list
;
1884 /* Scan through the list of windows for candidates. If there are
1885 candidate windows in front of WINDOW, the last one of these
1886 is the one we want. If there are candidates following WINDOW
1887 in the list, again the last one of these is the one we want. */
1889 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1891 if (EQ (XCAR (list
), window
))
1893 if (WINDOWP (candidate
))
1896 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1898 candidate
= XCAR (list
);
1901 if (WINDOWP (candidate
))
1909 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1910 doc
: /* Return next window after WINDOW in canonical ordering of windows.
1911 If omitted, WINDOW defaults to the selected window.
1913 Optional second arg MINIBUF t means count the minibuffer window even
1914 if not active. MINIBUF nil or omitted means count the minibuffer iff
1915 it is active. MINIBUF neither t nor nil means not to count the
1916 minibuffer even if it is active.
1918 Several frames may share a single minibuffer; if the minibuffer
1919 counts, all windows on all frames that share that minibuffer count
1920 too. Therefore, `next-window' can be used to iterate through the
1921 set of windows even when the minibuffer is on another frame. If the
1922 minibuffer does not count, only windows from WINDOW's frame count.
1924 Optional third arg ALL-FRAMES t means include windows on all frames.
1925 ALL-FRAMES nil or omitted means cycle within the frames as specified
1926 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1927 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1928 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1929 Anything else means restrict to WINDOW's frame.
1931 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1932 `next-window' to iterate through the entire cycle of acceptable
1933 windows, eventually ending up back at the window you started with.
1934 `previous-window' traverses the same cycle, in the reverse order. */)
1935 (window
, minibuf
, all_frames
)
1936 Lisp_Object window
, minibuf
, all_frames
;
1938 return next_window (window
, minibuf
, all_frames
, 1);
1942 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1943 doc
: /* Return the window preceding WINDOW in canonical ordering of windows.
1944 If omitted, WINDOW defaults to the selected window.
1946 Optional second arg MINIBUF t means count the minibuffer window even
1947 if not active. MINIBUF nil or omitted means count the minibuffer iff
1948 it is active. MINIBUF neither t nor nil means not to count the
1949 minibuffer even if it is active.
1951 Several frames may share a single minibuffer; if the minibuffer
1952 counts, all windows on all frames that share that minibuffer count
1953 too. Therefore, `previous-window' can be used to iterate through
1954 the set of windows even when the minibuffer is on another frame. If
1955 the minibuffer does not count, only windows from WINDOW's frame count
1957 Optional third arg ALL-FRAMES t means include windows on all frames.
1958 ALL-FRAMES nil or omitted means cycle within the frames as specified
1959 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1960 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1961 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1962 Anything else means restrict to WINDOW's frame.
1964 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1965 `previous-window' to iterate through the entire cycle of acceptable
1966 windows, eventually ending up back at the window you started with.
1967 `next-window' traverses the same cycle, in the reverse order. */)
1968 (window
, minibuf
, all_frames
)
1969 Lisp_Object window
, minibuf
, all_frames
;
1971 return next_window (window
, minibuf
, all_frames
, 0);
1975 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1976 doc
: /* Select the ARG'th different window on this frame.
1977 All windows on current frame are arranged in a cyclic order.
1978 This command selects the window ARG steps away in that order.
1979 A negative ARG moves in the opposite order. The optional second
1980 argument ALL-FRAMES has the same meaning as in `next-window', which see. */)
1982 Lisp_Object arg
, all_frames
;
1988 window
= selected_window
;
1990 for (i
= XINT (arg
); i
> 0; --i
)
1991 window
= Fnext_window (window
, Qnil
, all_frames
);
1993 window
= Fprevious_window (window
, Qnil
, all_frames
);
1995 Fselect_window (window
, Qnil
);
2000 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
2001 doc
: /* Return a list of windows on FRAME, starting with WINDOW.
2002 FRAME nil or omitted means use the selected frame.
2003 WINDOW nil or omitted means use the selected window.
2004 MINIBUF t means include the minibuffer window, even if it isn't active.
2005 MINIBUF nil or omitted means include the minibuffer window only
2007 MINIBUF neither nil nor t means never include the minibuffer window. */)
2008 (frame
, minibuf
, window
)
2009 Lisp_Object frame
, minibuf
, window
;
2012 window
= FRAMEP (frame
) ? XFRAME (frame
)->selected_window
: selected_window
;
2013 CHECK_WINDOW (window
);
2015 frame
= selected_frame
;
2017 if (!EQ (frame
, XWINDOW (window
)->frame
))
2018 error ("Window is on a different frame");
2020 return window_list_1 (window
, minibuf
, frame
);
2024 /* Return a list of windows in canonical ordering. Arguments are like
2025 for `next-window'. */
2028 window_list_1 (window
, minibuf
, all_frames
)
2029 Lisp_Object window
, minibuf
, all_frames
;
2031 Lisp_Object tail
, list
, rest
;
2033 decode_next_window_args (&window
, &minibuf
, &all_frames
);
2036 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
2037 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
2038 list
= Fcons (XCAR (tail
), list
);
2040 /* Rotate the list to start with WINDOW. */
2041 list
= Fnreverse (list
);
2042 rest
= Fmemq (window
, list
);
2043 if (!NILP (rest
) && !EQ (rest
, list
))
2045 for (tail
= list
; !EQ (XCDR (tail
), rest
); tail
= XCDR (tail
))
2047 XSETCDR (tail
, Qnil
);
2048 list
= nconc2 (rest
, list
);
2055 /* Look at all windows, performing an operation specified by TYPE
2057 If FRAMES is Qt, look at all frames;
2058 Qnil, look at just the selected frame;
2059 Qvisible, look at visible frames;
2060 a frame, just look at windows on that frame.
2061 If MINI is non-zero, perform the operation on minibuffer windows too. */
2066 GET_BUFFER_WINDOW
, /* Arg is buffer */
2067 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
2068 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
2069 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
2071 UNSHOW_BUFFER
, /* Arg is buffer */
2072 REDISPLAY_BUFFER_WINDOWS
, /* Arg is buffer */
2077 window_loop (type
, obj
, mini
, frames
)
2078 enum window_loop type
;
2079 Lisp_Object obj
, frames
;
2082 Lisp_Object window
, windows
, best_window
, frame_arg
;
2084 struct gcpro gcpro1
;
2086 /* If we're only looping through windows on a particular frame,
2087 frame points to that frame. If we're looping through windows
2088 on all frames, frame is 0. */
2089 if (FRAMEP (frames
))
2090 f
= XFRAME (frames
);
2091 else if (NILP (frames
))
2092 f
= SELECTED_FRAME ();
2097 frame_arg
= Qlambda
;
2098 else if (EQ (frames
, make_number (0)))
2100 else if (EQ (frames
, Qvisible
))
2105 /* frame_arg is Qlambda to stick to one frame,
2106 Qvisible to consider all visible frames,
2109 /* Pick a window to start with. */
2113 window
= FRAME_SELECTED_WINDOW (f
);
2115 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
2117 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
2121 for (; CONSP (windows
); windows
= XCDR (windows
))
2125 window
= XCAR (windows
);
2126 w
= XWINDOW (window
);
2128 /* Note that we do not pay attention here to whether the frame
2129 is visible, since Fwindow_list skips non-visible frames if
2130 that is desired, under the control of frame_arg. */
2131 if (!MINI_WINDOW_P (w
)
2132 /* For UNSHOW_BUFFER, we must always consider all windows. */
2133 || type
== UNSHOW_BUFFER
2134 || (mini
&& minibuf_level
> 0))
2137 case GET_BUFFER_WINDOW
:
2138 if (EQ (w
->buffer
, obj
)
2139 /* Don't find any minibuffer window
2140 except the one that is currently in use. */
2141 && (MINI_WINDOW_P (w
)
2142 ? EQ (window
, minibuf_window
)
2145 if (NILP (best_window
))
2146 best_window
= window
;
2147 else if (EQ (window
, selected_window
))
2148 /* For compatibility with 20.x, prefer to return
2150 best_window
= window
;
2154 case GET_LRU_WINDOW
:
2155 /* `obj' is an integer encoding a bitvector.
2156 `obj & 1' means consider only full-width windows.
2157 `obj & 2' means consider also dedicated windows. */
2158 if (((XINT (obj
) & 1) && !WINDOW_FULL_WIDTH_P (w
))
2159 || (!(XINT (obj
) & 2) && !NILP (w
->dedicated
))
2160 /* Minibuffer windows are always ignored. */
2161 || MINI_WINDOW_P (w
))
2163 if (NILP (best_window
)
2164 || (XFASTINT (XWINDOW (best_window
)->use_time
)
2165 > XFASTINT (w
->use_time
)))
2166 best_window
= window
;
2169 case DELETE_OTHER_WINDOWS
:
2170 if (!EQ (window
, obj
))
2171 Fdelete_window (window
);
2174 case DELETE_BUFFER_WINDOWS
:
2175 if (EQ (w
->buffer
, obj
))
2177 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
2179 /* If this window is dedicated, and in a frame of its own,
2181 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2182 && !NILP (w
->dedicated
)
2183 && other_visible_frames (f
))
2185 /* Skip the other windows on this frame.
2186 There might be one, the minibuffer! */
2187 while (CONSP (XCDR (windows
))
2188 && EQ (XWINDOW (XCAR (windows
))->frame
,
2189 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2190 windows
= XCDR (windows
);
2192 /* Now we can safely delete the frame. */
2193 Fdelete_frame (w
->frame
, Qnil
);
2195 else if (NILP (w
->parent
))
2197 /* If we're deleting the buffer displayed in the
2198 only window on the frame, find a new buffer to
2201 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2202 Fset_window_buffer (window
, buffer
, Qnil
);
2203 if (EQ (window
, selected_window
))
2204 Fset_buffer (w
->buffer
);
2207 Fdelete_window (window
);
2211 case GET_LARGEST_WINDOW
:
2212 { /* nil `obj' means to ignore dedicated windows. */
2213 /* Ignore dedicated windows and minibuffers. */
2214 if (MINI_WINDOW_P (w
) || (NILP (obj
) && !NILP (w
->dedicated
)))
2217 if (NILP (best_window
))
2218 best_window
= window
;
2221 struct window
*b
= XWINDOW (best_window
);
2222 if (XFASTINT (w
->total_lines
) * XFASTINT (w
->total_cols
)
2223 > XFASTINT (b
->total_lines
) * XFASTINT (b
->total_cols
))
2224 best_window
= window
;
2230 if (EQ (w
->buffer
, obj
))
2233 struct frame
*f
= XFRAME (w
->frame
);
2235 /* Find another buffer to show in this window. */
2236 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2238 /* If this window is dedicated, and in a frame of its own,
2240 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2241 && !NILP (w
->dedicated
)
2242 && other_visible_frames (f
))
2244 /* Skip the other windows on this frame.
2245 There might be one, the minibuffer! */
2246 while (CONSP (XCDR (windows
))
2247 && EQ (XWINDOW (XCAR (windows
))->frame
,
2248 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2249 windows
= XCDR (windows
);
2251 /* Now we can safely delete the frame. */
2252 Fdelete_frame (w
->frame
, Qnil
);
2254 else if (!NILP (w
->dedicated
) && !NILP (w
->parent
))
2257 XSETWINDOW (window
, w
);
2258 /* If this window is dedicated and not the only window
2259 in its frame, then kill it. */
2260 Fdelete_window (window
);
2264 /* Otherwise show a different buffer in the window. */
2265 w
->dedicated
= Qnil
;
2266 Fset_window_buffer (window
, buffer
, Qnil
);
2267 if (EQ (window
, selected_window
))
2268 Fset_buffer (w
->buffer
);
2273 case REDISPLAY_BUFFER_WINDOWS
:
2274 if (EQ (w
->buffer
, obj
))
2276 mark_window_display_accurate (window
, 0);
2277 w
->update_mode_line
= Qt
;
2278 XBUFFER (obj
)->prevent_redisplay_optimizations_p
= 1;
2279 ++update_mode_lines
;
2280 best_window
= window
;
2284 /* Check for a window that has a killed buffer. */
2285 case CHECK_ALL_WINDOWS
:
2286 if (! NILP (w
->buffer
)
2287 && NILP (XBUFFER (w
->buffer
)->name
))
2291 case WINDOW_LOOP_UNUSED
:
2300 /* Used for debugging. Abort if any window has a dead buffer. */
2303 check_all_windows ()
2305 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
2308 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 2, 0,
2309 doc
: /* Return the window least recently selected or used for display.
2310 Return a full-width window if possible.
2311 A minibuffer window is never a candidate.
2312 A dedicated window is never a candidate, unless DEDICATED is non-nil,
2313 so if all windows are dedicated, the value is nil.
2314 If optional argument FRAME is `visible', search all visible frames.
2315 If FRAME is 0, search all visible and iconified frames.
2316 If FRAME is t, search all frames.
2317 If FRAME is nil, search only the selected frame.
2318 If FRAME is a frame, search only that frame. */)
2320 Lisp_Object frame
, dedicated
;
2322 register Lisp_Object w
;
2323 /* First try for a window that is full-width */
2324 w
= window_loop (GET_LRU_WINDOW
,
2325 NILP (dedicated
) ? make_number (1) : make_number (3),
2327 if (!NILP (w
) && !EQ (w
, selected_window
))
2329 /* If none of them, try the rest */
2330 return window_loop (GET_LRU_WINDOW
,
2331 NILP (dedicated
) ? make_number (0) : make_number (2),
2335 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 2, 0,
2336 doc
: /* Return the largest window in area.
2337 A minibuffer window is never a candidate.
2338 A dedicated window is never a candidate unless DEDICATED is non-nil,
2339 so if all windows are dedicated, the value is nil.
2340 If optional argument FRAME is `visible', search all visible frames.
2341 If FRAME is 0, search all visible and iconified frames.
2342 If FRAME is t, search all frames.
2343 If FRAME is nil, search only the selected frame.
2344 If FRAME is a frame, search only that frame. */)
2346 Lisp_Object frame
, dedicated
;
2348 return window_loop (GET_LARGEST_WINDOW
, dedicated
, 0,
2352 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
2353 doc
: /* Return a window currently displaying BUFFER, or nil if none.
2354 BUFFER can be a buffer or a buffer name.
2355 If optional argument FRAME is `visible', search all visible frames.
2356 If optional argument FRAME is 0, search all visible and iconified frames.
2357 If FRAME is t, search all frames.
2358 If FRAME is nil, search only the selected frame.
2359 If FRAME is a frame, search only that frame. */)
2361 Lisp_Object buffer
, frame
;
2363 buffer
= Fget_buffer (buffer
);
2364 if (BUFFERP (buffer
))
2365 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
2370 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
2372 doc
: /* Make WINDOW (or the selected window) fill its frame.
2373 Only the frame WINDOW is on is affected.
2374 This function tries to reduce display jumps
2375 by keeping the text previously visible in WINDOW
2376 in the same place on the frame. Doing this depends on
2377 the value of (window-start WINDOW), so if calling this function
2378 in a program gives strange scrolling, make sure the window-start
2379 value is reasonable when this function is called. */)
2388 window
= selected_window
;
2390 CHECK_LIVE_WINDOW (window
);
2391 w
= XWINDOW (window
);
2393 startpos
= marker_position (w
->start
);
2394 top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2396 if (MINI_WINDOW_P (w
) && top
> 0)
2397 error ("Can't expand minibuffer to full frame");
2399 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2401 /* Try to minimize scrolling, by setting the window start to the point
2402 will cause the text at the old window start to be at the same place
2403 on the frame. But don't try to do this if the window start is
2404 outside the visible portion (as might happen when the display is
2405 not current, due to typeahead). */
2406 new_top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2408 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2409 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2411 struct position pos
;
2412 struct buffer
*obuf
= current_buffer
;
2414 Fset_buffer (w
->buffer
);
2415 /* This computation used to temporarily move point, but that can
2416 have unwanted side effects due to text properties. */
2417 pos
= *vmotion (startpos
, -top
, w
);
2419 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2420 w
->window_end_valid
= Qnil
;
2421 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2422 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2424 /* We need to do this, so that the window-scroll-functions
2426 w
->optional_new_start
= Qt
;
2428 set_buffer_internal (obuf
);
2434 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2435 1, 2, "bDelete windows on (buffer): ",
2436 doc
: /* Delete all windows showing BUFFER.
2437 BUFFER must be a buffer or the name of an existing buffer.
2438 Optional second argument FRAME controls which frames are affected.
2439 If optional argument FRAME is `visible', search all visible frames.
2440 If FRAME is 0, search all visible and iconified frames.
2441 If FRAME is nil, search all frames.
2442 If FRAME is t, search only the selected frame.
2443 If FRAME is a frame, search only that frame. */)
2445 Lisp_Object buffer
, frame
;
2447 /* FRAME uses t and nil to mean the opposite of what window_loop
2451 else if (EQ (frame
, Qt
))
2456 buffer
= Fget_buffer (buffer
);
2457 CHECK_BUFFER (buffer
);
2458 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2464 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2465 Sreplace_buffer_in_windows
,
2466 1, 1, "bReplace buffer in windows: ",
2467 doc
: /* Replace BUFFER with some other buffer in all windows showing it.
2468 BUFFER may be a buffer or the name of an existing buffer. */)
2474 buffer
= Fget_buffer (buffer
);
2475 CHECK_BUFFER (buffer
);
2476 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2481 /* Replace BUFFER with some other buffer in all windows
2482 of all frames, even those on other keyboards. */
2485 replace_buffer_in_all_windows (buffer
)
2489 Lisp_Object tail
, frame
;
2491 /* A single call to window_loop won't do the job
2492 because it only considers frames on the current keyboard.
2493 So loop manually over frames, and handle each one. */
2494 FOR_EACH_FRAME (tail
, frame
)
2495 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2497 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2501 /* Set the height of WINDOW and all its inferiors. */
2503 /* The smallest acceptable dimensions for a window. Anything smaller
2504 might crash Emacs. */
2506 #define MIN_SAFE_WINDOW_WIDTH (2)
2507 #define MIN_SAFE_WINDOW_HEIGHT (1)
2509 /* Make sure that window_min_height and window_min_width are
2510 not too small; if they are, set them to safe minima. */
2513 check_min_window_sizes ()
2515 /* Smaller values might permit a crash. */
2516 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2517 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2518 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2519 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2522 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2523 minimum allowable size. */
2526 check_frame_size (frame
, rows
, cols
)
2530 /* For height, we have to see:
2531 how many windows the frame has at minimum (one or two),
2532 and whether it has a menu bar or other special stuff at the top. */
2534 = ((FRAME_MINIBUF_ONLY_P (frame
) || ! FRAME_HAS_MINIBUF_P (frame
))
2535 ? MIN_SAFE_WINDOW_HEIGHT
2536 : 2 * MIN_SAFE_WINDOW_HEIGHT
);
2538 if (FRAME_TOP_MARGIN (frame
) > 0)
2539 min_height
+= FRAME_TOP_MARGIN (frame
);
2541 if (*rows
< min_height
)
2543 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2544 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2548 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2549 check if W's width can be changed, otherwise check W's height.
2550 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2551 siblings, too. If none of the siblings is resizable, WINDOW isn't
2555 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2557 int width_p
, check_siblings_p
;
2562 if (!NILP (w
->hchild
))
2564 c
= XWINDOW (w
->hchild
);
2568 /* A horiz. combination is fixed-width if all of if its
2570 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2571 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2572 fixed_p
= c
== NULL
;
2576 /* A horiz. combination is fixed-height if one of if its
2578 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2579 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2580 fixed_p
= c
!= NULL
;
2583 else if (!NILP (w
->vchild
))
2585 c
= XWINDOW (w
->vchild
);
2589 /* A vert. combination is fixed-width if one of if its
2591 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2592 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2593 fixed_p
= c
!= NULL
;
2597 /* A vert. combination is fixed-height if all of if its
2599 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2600 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2601 fixed_p
= c
== NULL
;
2604 else if (BUFFERP (w
->buffer
))
2606 struct buffer
*old
= current_buffer
;
2609 current_buffer
= XBUFFER (w
->buffer
);
2610 val
= find_symbol_value (Qwindow_size_fixed
);
2611 current_buffer
= old
;
2614 if (!EQ (val
, Qunbound
))
2616 fixed_p
= !NILP (val
);
2619 && ((EQ (val
, Qheight
) && width_p
)
2620 || (EQ (val
, Qwidth
) && !width_p
)))
2624 /* Can't tell if this one is resizable without looking at
2625 siblings. If all siblings are fixed-size this one is too. */
2626 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2630 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2631 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2635 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2636 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2650 /* Return the minimum size of window W, not taking fixed-width windows
2651 into account. WIDTH_P non-zero means return the minimum width,
2652 otherwise return the minimum height. If W is a combination window,
2653 compute the minimum size from the minimum sizes of W's children. */
2656 window_min_size_1 (w
, width_p
)
2663 if (!NILP (w
->hchild
))
2665 c
= XWINDOW (w
->hchild
);
2670 /* The min width of a horizontal combination is
2671 the sum of the min widths of its children. */
2674 size
+= window_min_size_1 (c
, width_p
);
2675 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2680 /* The min height a horizontal combination equals
2681 the maximum of all min height of its children. */
2684 int min_size
= window_min_size_1 (c
, width_p
);
2685 size
= max (min_size
, size
);
2686 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2690 else if (!NILP (w
->vchild
))
2692 c
= XWINDOW (w
->vchild
);
2697 /* The min width of a vertical combination is
2698 the maximum of the min widths of its children. */
2701 int min_size
= window_min_size_1 (c
, width_p
);
2702 size
= max (min_size
, size
);
2703 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2708 /* The min height of a vertical combination equals
2709 the sum of the min height of its children. */
2712 size
+= window_min_size_1 (c
, width_p
);
2713 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2720 size
= max (window_min_width
,
2721 (MIN_SAFE_WINDOW_WIDTH
2722 + WINDOW_FRINGE_COLS (w
)
2723 + WINDOW_SCROLL_BAR_COLS (w
)));
2726 if (MINI_WINDOW_P (w
)
2727 || (!WINDOW_WANTS_MODELINE_P (w
)
2728 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2731 size
= window_min_height
;
2739 /* Return the minimum size of window W, taking fixed-size windows into
2740 account. WIDTH_P non-zero means return the minimum width,
2741 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2742 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2743 unless FIXED is null. */
2746 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2748 int width_p
, ignore_fixed_p
, *fixed
;
2755 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2761 size
= width_p
? XFASTINT (w
->total_cols
) : XFASTINT (w
->total_lines
);
2763 size
= window_min_size_1 (w
, width_p
);
2769 /* Adjust the margins of window W if text area is too small.
2770 Return 1 if window width is ok after adjustment; 0 if window
2771 is still too narrow. */
2774 adjust_window_margins (w
)
2777 int box_cols
= (WINDOW_TOTAL_COLS (w
)
2778 - WINDOW_FRINGE_COLS (w
)
2779 - WINDOW_SCROLL_BAR_COLS (w
));
2780 int margin_cols
= (WINDOW_LEFT_MARGIN_COLS (w
)
2781 + WINDOW_RIGHT_MARGIN_COLS (w
));
2783 if (box_cols
- margin_cols
>= MIN_SAFE_WINDOW_WIDTH
)
2786 if (margin_cols
< 0 || box_cols
< MIN_SAFE_WINDOW_WIDTH
)
2789 /* Window's text area is too narrow, but reducing the window
2790 margins will fix that. */
2791 margin_cols
= box_cols
- MIN_SAFE_WINDOW_WIDTH
;
2792 if (WINDOW_RIGHT_MARGIN_COLS (w
) > 0)
2794 if (WINDOW_LEFT_MARGIN_COLS (w
) > 0)
2795 w
->left_margin_cols
= w
->right_margin_cols
2796 = make_number (margin_cols
/2);
2798 w
->right_margin_cols
= make_number (margin_cols
);
2801 w
->left_margin_cols
= make_number (margin_cols
);
2805 /* Calculate new sizes for windows in the list FORWARD when the window size
2806 goes from TOTAL to SIZE. TOTAL must be greater than SIZE.
2807 The number of windows in FORWARD is NCHILDREN, and the number that
2808 can shrink is SHRINKABLE.
2809 The minimum size a window can have is MIN_SIZE.
2810 If we are shrinking fixed windows, RESIZE_FIXED_P is non-zero.
2811 If we are shrinking columns, WIDTH_P is non-zero, otherwise we are
2814 This function returns an allocated array of new sizes that the caller
2815 must free. The size -1 means the window is fixed and RESIZE_FIXED_P
2816 is zero. Array index 0 refers to the first window in FORWARD, 1 to
2817 the second, and so on.
2819 This function tries to keep windows at least at the minimum size
2820 and resize other windows before it resizes any window to zero (i.e.
2821 delete that window).
2823 Windows are resized proportional to their size, so bigger windows
2824 shrink more than smaller windows. */
2826 shrink_windows (total
, size
, nchildren
, shrinkable
,
2827 min_size
, resize_fixed_p
, forward
, width_p
)
2828 int total
, size
, nchildren
, shrinkable
, min_size
;
2829 int resize_fixed_p
, width_p
;
2830 Lisp_Object forward
;
2832 int available_resize
= 0;
2836 int smallest
= total
;
2837 int total_removed
= 0;
2838 int total_shrink
= total
- size
;
2841 new_sizes
= xmalloc (sizeof (*new_sizes
) * nchildren
);
2843 for (i
= 0, child
= forward
; !NILP (child
); child
= c
->next
, ++i
)
2847 c
= XWINDOW (child
);
2848 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2850 if (! resize_fixed_p
&& window_fixed_size_p (c
, width_p
, 0))
2854 new_sizes
[i
] = child_size
;
2855 if (child_size
> min_size
)
2856 available_resize
+= child_size
- min_size
;
2859 /* We might need to shrink some windows to zero. Find the smallest
2860 windows and set them to 0 until we can fulfil the new size. */
2862 while (shrinkable
> 1 && size
+ available_resize
< total
)
2864 for (i
= 0; i
< nchildren
; ++i
)
2865 if (new_sizes
[i
] > 0 && smallest
> new_sizes
[i
])
2866 smallest
= new_sizes
[i
];
2868 for (i
= 0; i
< nchildren
; ++i
)
2869 if (new_sizes
[i
] == smallest
)
2871 /* Resize this window down to zero. */
2873 if (smallest
> min_size
)
2874 available_resize
-= smallest
- min_size
;
2875 available_resize
+= smallest
;
2877 total_removed
+= smallest
;
2879 /* We don't know what the smallest is now. */
2882 /* Out of for, just remove one window at the time and
2883 check again if we have enough space. */
2888 /* Now, calculate the new sizes. Try to shrink each window
2889 proportional to its size. */
2890 for (i
= 0; i
< nchildren
; ++i
)
2892 if (new_sizes
[i
] > min_size
)
2894 int to_shrink
= total_shrink
*new_sizes
[i
]/total
;
2895 if (new_sizes
[i
] - to_shrink
< min_size
)
2896 to_shrink
= new_sizes
[i
] - min_size
;
2897 new_sizes
[i
] -= to_shrink
;
2898 total_removed
+= to_shrink
;
2902 /* Any reminder due to rounding, we just subtract from windows
2903 that are left and still can be shrunk. */
2904 while (total_shrink
> total_removed
)
2906 int nonzero_sizes
= 0;
2907 int nonzero_idx
= -1;
2909 for (i
= 0; i
< nchildren
; ++i
)
2910 if (new_sizes
[i
] > 0)
2916 for (i
= 0; i
< nchildren
; ++i
)
2917 if (new_sizes
[i
] > min_size
)
2922 /* Out of for, just shrink one window at the time and
2923 check again if we have enough space. */
2928 /* Special case, only one window left. */
2929 if (nonzero_sizes
== 1)
2933 /* Any surplus due to rounding, we add to windows that are left. */
2934 while (total_shrink
< total_removed
)
2936 for (i
= 0; i
< nchildren
; ++i
)
2938 if (new_sizes
[i
] != 0 && total_shrink
< total_removed
)
2950 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2951 WINDOW's width. Resize WINDOW's children, if any, so that they
2952 keep their proportionate size relative to WINDOW.
2954 If FIRST_ONLY is 1, change only the first of WINDOW's children when
2955 they are in series. If LAST_ONLY is 1, change only the last of
2956 WINDOW's children when they are in series.
2958 Propagate WINDOW's top or left edge position to children. Delete
2959 windows that become too small unless NODELETE_P is non-zero.
2961 If NODELETE_P is 2, that means we do delete windows that are
2962 too small, even if they were too small before! */
2965 size_window (window
, size
, width_p
, nodelete_p
, first_only
, last_only
)
2967 int size
, width_p
, nodelete_p
;
2968 int first_only
, last_only
;
2970 struct window
*w
= XWINDOW (window
);
2972 Lisp_Object child
, *forward
, *sideward
;
2973 int old_size
, min_size
, safe_min_size
;
2975 /* We test nodelete_p != 2 and nodelete_p != 1 below, so it
2976 seems like it's too soon to do this here. ++KFS. */
2977 if (nodelete_p
== 2)
2980 check_min_window_sizes ();
2981 size
= max (0, size
);
2983 /* If the window has been "too small" at one point,
2984 don't delete it for being "too small" in the future.
2985 Preserve it as long as that is at all possible. */
2988 old_size
= WINDOW_TOTAL_COLS (w
);
2989 min_size
= window_min_width
;
2990 /* Ensure that there is room for the scroll bar and fringes!
2991 We may reduce display margins though. */
2992 safe_min_size
= (MIN_SAFE_WINDOW_WIDTH
2993 + WINDOW_FRINGE_COLS (w
)
2994 + WINDOW_SCROLL_BAR_COLS (w
));
2998 old_size
= XINT (w
->total_lines
);
2999 min_size
= window_min_height
;
3000 safe_min_size
= MIN_SAFE_WINDOW_HEIGHT
;
3003 if (old_size
< min_size
&& nodelete_p
!= 2)
3004 w
->too_small_ok
= Qt
;
3006 /* Maybe delete WINDOW if it's too small. */
3007 if (nodelete_p
!= 1 && !NILP (w
->parent
))
3009 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
3010 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
3011 if (min_size
< safe_min_size
)
3012 min_size
= safe_min_size
;
3013 if (size
< min_size
)
3015 delete_window (window
);
3020 /* Set redisplay hints. */
3021 w
->last_modified
= make_number (0);
3022 w
->last_overlay_modified
= make_number (0);
3023 windows_or_buffers_changed
++;
3024 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
3028 sideward
= &w
->vchild
;
3029 forward
= &w
->hchild
;
3030 w
->total_cols
= make_number (size
);
3031 adjust_window_margins (w
);
3035 sideward
= &w
->hchild
;
3036 forward
= &w
->vchild
;
3037 w
->total_lines
= make_number (size
);
3038 w
->orig_total_lines
= Qnil
;
3041 if (!NILP (*sideward
))
3043 /* We have a chain of parallel siblings whose size should all change. */
3044 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
3046 c
= XWINDOW (child
);
3048 c
->left_col
= w
->left_col
;
3050 c
->top_line
= w
->top_line
;
3051 size_window (child
, size
, width_p
, nodelete_p
,
3052 first_only
, last_only
);
3055 else if (!NILP (*forward
) && last_only
)
3057 /* Change the last in a series of siblings. */
3058 Lisp_Object last_child
;
3061 for (child
= *forward
; !NILP (child
); child
= c
->next
)
3063 c
= XWINDOW (child
);
3067 child_size
= XINT (width_p
? c
->total_cols
: c
->total_lines
);
3068 size_window (last_child
,
3069 size
- old_size
+ child_size
,
3070 width_p
, nodelete_p
, first_only
, last_only
);
3072 else if (!NILP (*forward
) && first_only
)
3074 /* Change the first in a series of siblings. */
3078 c
= XWINDOW (child
);
3081 c
->left_col
= w
->left_col
;
3083 c
->top_line
= w
->top_line
;
3085 child_size
= XINT (width_p
? c
->total_cols
: c
->total_lines
);
3087 size
- old_size
+ child_size
,
3088 width_p
, nodelete_p
, first_only
, last_only
);
3090 else if (!NILP (*forward
))
3092 int fixed_size
, each
, extra
, n
;
3093 int resize_fixed_p
, nfixed
;
3094 int last_pos
, first_pos
, nchildren
, total
;
3095 int *new_sizes
= NULL
;
3097 /* Determine the fixed-size portion of this window, and the
3098 number of child windows. */
3099 fixed_size
= nchildren
= nfixed
= total
= 0;
3100 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
3104 c
= XWINDOW (child
);
3105 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
3106 total
+= child_size
;
3108 if (window_fixed_size_p (c
, width_p
, 0))
3110 fixed_size
+= child_size
;
3115 /* If the new size is smaller than fixed_size, or if there
3116 aren't any resizable windows, allow resizing fixed-size
3118 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
3120 /* Compute how many lines/columns to add/remove to each child. The
3121 value of extra takes care of rounding errors. */
3122 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
3123 if (size
< total
&& n
> 1)
3124 new_sizes
= shrink_windows (total
, size
, nchildren
, n
, min_size
,
3125 resize_fixed_p
, *forward
, width_p
);
3128 each
= (size
- total
) / n
;
3129 extra
= (size
- total
) - n
* each
;
3132 /* Compute new children heights and edge positions. */
3133 first_pos
= width_p
? XINT (w
->left_col
) : XINT (w
->top_line
);
3134 last_pos
= first_pos
;
3135 for (n
= 0, child
= *forward
; !NILP (child
); child
= c
->next
, ++n
)
3137 int new_size
, old_size
;
3139 c
= XWINDOW (child
);
3140 old_size
= width_p
? XFASTINT (c
->total_cols
) : XFASTINT (c
->total_lines
);
3141 new_size
= old_size
;
3143 /* The top or left edge position of this child equals the
3144 bottom or right edge of its predecessor. */
3146 c
->left_col
= make_number (last_pos
);
3148 c
->top_line
= make_number (last_pos
);
3150 /* If this child can be resized, do it. */
3151 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
3153 new_size
= new_sizes
? new_sizes
[n
] : old_size
+ each
+ extra
;
3157 /* Set new height. Note that size_window also propagates
3158 edge positions to children, so it's not a no-op if we
3159 didn't change the child's size. */
3160 size_window (child
, new_size
, width_p
, 1, first_only
, last_only
);
3162 /* Remember the bottom/right edge position of this child; it
3163 will be used to set the top/left edge of the next child. */
3164 last_pos
+= new_size
;
3167 if (new_sizes
) xfree (new_sizes
);
3169 /* We should have covered the parent exactly with child windows. */
3170 xassert (size
== last_pos
- first_pos
);
3172 /* Now delete any children that became too small. */
3174 for (child
= *forward
; !NILP (child
); child
= c
->next
)
3177 c
= XWINDOW (child
);
3178 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
3179 size_window (child
, child_size
, width_p
, 2, first_only
, last_only
);
3184 /* Set WINDOW's height to HEIGHT, and recursively change the height of
3185 WINDOW's children. NODELETE non-zero means don't delete windows
3186 that become too small in the process. (The caller should check
3187 later and do so if appropriate.) */
3190 set_window_height (window
, height
, nodelete
)
3195 size_window (window
, height
, 0, nodelete
, 0, 0);
3199 /* Set WINDOW's width to WIDTH, and recursively change the width of
3200 WINDOW's children. NODELETE non-zero means don't delete windows
3201 that become too small in the process. (The caller should check
3202 later and do so if appropriate.) */
3205 set_window_width (window
, width
, nodelete
)
3210 size_window (window
, width
, 1, nodelete
, 0, 0);
3213 /* Change window heights in windows rooted in WINDOW by N lines. */
3216 change_window_heights (window
, n
)
3220 struct window
*w
= XWINDOW (window
);
3222 XSETFASTINT (w
->top_line
, XFASTINT (w
->top_line
) + n
);
3223 XSETFASTINT (w
->total_lines
, XFASTINT (w
->total_lines
) - n
);
3225 if (INTEGERP (w
->orig_top_line
))
3226 XSETFASTINT (w
->orig_top_line
, XFASTINT (w
->orig_top_line
) + n
);
3227 if (INTEGERP (w
->orig_total_lines
))
3228 XSETFASTINT (w
->orig_total_lines
, XFASTINT (w
->orig_total_lines
) - n
);
3230 /* Handle just the top child in a vertical split. */
3231 if (!NILP (w
->vchild
))
3232 change_window_heights (w
->vchild
, n
);
3234 /* Adjust all children in a horizontal split. */
3235 for (window
= w
->hchild
; !NILP (window
); window
= w
->next
)
3237 w
= XWINDOW (window
);
3238 change_window_heights (window
, n
);
3243 int window_select_count
;
3246 Fset_window_buffer_unwind (obuf
)
3253 EXFUN (Fset_window_fringes
, 4);
3254 EXFUN (Fset_window_scroll_bars
, 4);
3256 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
3257 means it's allowed to run hooks. See make_frame for a case where
3258 it's not allowed. KEEP_MARGINS_P non-zero means that the current
3259 margins, fringes, and scroll-bar settings of the window are not
3260 reset from the buffer's local settings. */
3263 set_window_buffer (window
, buffer
, run_hooks_p
, keep_margins_p
)
3264 Lisp_Object window
, buffer
;
3265 int run_hooks_p
, keep_margins_p
;
3267 struct window
*w
= XWINDOW (window
);
3268 struct buffer
*b
= XBUFFER (buffer
);
3269 int count
= SPECPDL_INDEX ();
3273 if (EQ (window
, selected_window
))
3274 b
->last_selected_window
= window
;
3276 /* Let redisplay errors through. */
3277 b
->display_error_modiff
= 0;
3279 /* Update time stamps of buffer display. */
3280 if (INTEGERP (b
->display_count
))
3281 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
3282 b
->display_time
= Fcurrent_time ();
3284 XSETFASTINT (w
->window_end_pos
, 0);
3285 XSETFASTINT (w
->window_end_vpos
, 0);
3286 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
3287 w
->window_end_valid
= Qnil
;
3288 w
->hscroll
= w
->min_hscroll
= make_number (0);
3290 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
3291 set_marker_restricted (w
->start
,
3292 make_number (b
->last_window_start
),
3294 w
->start_at_line_beg
= Qnil
;
3295 w
->force_start
= Qnil
;
3296 XSETFASTINT (w
->last_modified
, 0);
3297 XSETFASTINT (w
->last_overlay_modified
, 0);
3298 windows_or_buffers_changed
++;
3300 /* We must select BUFFER for running the window-scroll-functions.
3301 If WINDOW is selected, switch permanently.
3302 Otherwise, switch but go back to the ambient buffer afterward. */
3303 if (EQ (window
, selected_window
))
3304 Fset_buffer (buffer
);
3305 /* We can't check ! NILP (Vwindow_scroll_functions) here
3306 because that might itself be a local variable. */
3307 else if (window_initialized
)
3309 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
3310 Fset_buffer (buffer
);
3313 if (!keep_margins_p
)
3315 /* Set left and right marginal area width etc. from buffer. */
3317 /* This may call adjust_window_margins three times, so
3318 temporarily disable window margins. */
3319 Lisp_Object save_left
= w
->left_margin_cols
;
3320 Lisp_Object save_right
= w
->right_margin_cols
;
3322 w
->left_margin_cols
= w
->right_margin_cols
= Qnil
;
3324 Fset_window_fringes (window
,
3325 b
->left_fringe_width
, b
->right_fringe_width
,
3326 b
->fringes_outside_margins
);
3328 Fset_window_scroll_bars (window
,
3329 b
->scroll_bar_width
,
3330 b
->vertical_scroll_bar_type
, Qnil
);
3332 w
->left_margin_cols
= save_left
;
3333 w
->right_margin_cols
= save_right
;
3335 Fset_window_margins (window
,
3336 b
->left_margin_cols
, b
->right_margin_cols
);
3341 if (! NILP (Vwindow_scroll_functions
))
3342 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
3343 Fmarker_position (w
->start
));
3345 if (! NILP (Vwindow_configuration_change_hook
)
3346 && ! NILP (Vrun_hooks
))
3347 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3350 unbind_to (count
, Qnil
);
3354 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 3, 0,
3355 doc
: /* Make WINDOW display BUFFER as its contents.
3356 BUFFER can be a buffer or the name of an existing buffer.
3357 Optional third arg KEEP-MARGINS non-nil means that WINDOW's current
3358 display margins, fringe widths, and scroll bar settings are maintained;
3359 the default is to reset these from BUFFER's local settings or the frame
3362 This function runs the hook `window-scroll-functions'. */)
3363 (window
, buffer
, keep_margins
)
3364 register Lisp_Object window
, buffer
, keep_margins
;
3366 register Lisp_Object tem
;
3367 register struct window
*w
= decode_window (window
);
3369 XSETWINDOW (window
, w
);
3370 buffer
= Fget_buffer (buffer
);
3371 CHECK_BUFFER (buffer
);
3373 if (NILP (XBUFFER (buffer
)->name
))
3374 error ("Attempt to display deleted buffer");
3378 error ("Window is deleted");
3379 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
3380 is first being set up. */
3382 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
3383 error ("Window is dedicated to `%s'",
3384 SDATA (XBUFFER (tem
)->name
));
3389 set_window_buffer (window
, buffer
, 1, !NILP (keep_margins
));
3393 /* Note that selected_window can be nil
3394 when this is called from Fset_window_configuration. */
3396 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 2, 0,
3397 doc
: /* Select WINDOW. Most editing will apply to WINDOW's buffer.
3398 If WINDOW is not already selected, make WINDOW's buffer current
3399 and make WINDOW the frame's selected window. Return WINDOW.
3400 Optional second arg NORECORD non-nil means
3401 do not put this buffer at the front of the list of recently selected ones.
3403 Note that the main editor command loop
3404 selects the buffer of the selected window before each command. */)
3406 register Lisp_Object window
, norecord
;
3408 register struct window
*w
;
3409 register struct window
*ow
;
3412 CHECK_LIVE_WINDOW (window
);
3414 w
= XWINDOW (window
);
3415 w
->frozen_window_start_p
= 0;
3417 ++window_select_count
;
3418 XSETFASTINT (w
->use_time
, window_select_count
);
3419 if (EQ (window
, selected_window
))
3422 /* Store the current buffer's actual point into the
3423 old selected window. It belongs to that window,
3424 and when the window is not selected, must be in the window. */
3425 if (!NILP (selected_window
))
3427 ow
= XWINDOW (selected_window
);
3428 if (! NILP (ow
->buffer
))
3429 set_marker_both (ow
->pointm
, ow
->buffer
,
3430 BUF_PT (XBUFFER (ow
->buffer
)),
3431 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
3434 selected_window
= window
;
3435 sf
= SELECTED_FRAME ();
3436 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
3438 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
3439 /* Use this rather than Fhandle_switch_frame
3440 so that FRAME_FOCUS_FRAME is moved appropriately as we
3441 move around in the state where a minibuffer in a separate
3443 Fselect_frame (WINDOW_FRAME (w
));
3446 sf
->selected_window
= window
;
3448 if (NILP (norecord
))
3449 record_buffer (w
->buffer
);
3450 Fset_buffer (w
->buffer
);
3452 XBUFFER (w
->buffer
)->last_selected_window
= window
;
3454 /* Go to the point recorded in the window.
3455 This is important when the buffer is in more
3456 than one window. It also matters when
3457 redisplay_window has altered point after scrolling,
3458 because it makes the change only in the window. */
3460 register int new_point
= marker_position (w
->pointm
);
3461 if (new_point
< BEGV
)
3463 else if (new_point
> ZV
)
3469 windows_or_buffers_changed
++;
3474 select_window_norecord (window
)
3477 return Fselect_window (window
, Qt
);
3480 /* Deiconify the frame containing the window WINDOW,
3481 unless it is the selected frame;
3484 The reason for the exception for the selected frame
3485 is that it seems better not to change the selected frames visibility
3486 merely because of displaying a different buffer in it.
3487 The deiconification is useful when a buffer gets shown in
3488 another frame that you were not using lately. */
3491 display_buffer_1 (window
)
3494 Lisp_Object frame
= XWINDOW (window
)->frame
;
3495 FRAME_PTR f
= XFRAME (frame
);
3497 FRAME_SAMPLE_VISIBILITY (f
);
3499 if (EQ (frame
, selected_frame
))
3500 ; /* Assume the selected frame is already visible enough. */
3501 else if (minibuf_level
> 0
3502 && MINI_WINDOW_P (XWINDOW (selected_window
))
3503 && WINDOW_LIVE_P (minibuf_selected_window
)
3504 && EQ (frame
, WINDOW_FRAME (XWINDOW (minibuf_selected_window
))))
3505 ; /* Assume the frame from which we invoked the minibuffer is visible. */
3508 if (FRAME_ICONIFIED_P (f
))
3509 Fmake_frame_visible (frame
);
3510 else if (FRAME_VISIBLE_P (f
))
3511 Fraise_frame (frame
);
3517 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
3518 doc
: /* Returns non-nil if a buffer named BUFFER-NAME gets a special frame.
3519 If the value is t, `display-buffer' or `pop-to-buffer' would create a
3520 special frame for that buffer using the default frame parameters.
3522 If the value is a list, it is a list of frame parameters that would be used
3523 to make a frame for that buffer.
3524 The variables `special-display-buffer-names'
3525 and `special-display-regexps' control this. */)
3527 Lisp_Object buffer_name
;
3531 CHECK_STRING (buffer_name
);
3533 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
3537 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
3541 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3543 Lisp_Object car
= XCAR (tem
);
3545 && fast_string_match (car
, buffer_name
) >= 0)
3547 else if (CONSP (car
)
3548 && STRINGP (XCAR (car
))
3549 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3555 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
3556 doc
: /* Returns non-nil if a buffer named BUFFER-NAME would use the same window.
3557 More precisely, if `display-buffer' or `pop-to-buffer' would display
3558 that buffer in the selected window rather than (as usual) in some other window.
3559 See `same-window-buffer-names' and `same-window-regexps'. */)
3561 Lisp_Object buffer_name
;
3565 CHECK_STRING (buffer_name
);
3567 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
3571 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
3575 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3577 Lisp_Object car
= XCAR (tem
);
3579 && fast_string_match (car
, buffer_name
) >= 0)
3581 else if (CONSP (car
)
3582 && STRINGP (XCAR (car
))
3583 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3589 /* Use B so the default is (other-buffer). */
3590 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
3591 "BDisplay buffer: \nP",
3592 doc
: /* Make BUFFER appear in some window but don't select it.
3593 BUFFER must be the name of an existing buffer, or, when called from Lisp,
3595 If BUFFER is shown already in some window, just use that one,
3596 unless the window is the selected window and the optional second
3597 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).
3598 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.
3599 Returns the window displaying BUFFER.
3600 If `display-buffer-reuse-frames' is non-nil, and another frame is currently
3601 displaying BUFFER, then simply raise that frame.
3603 The variables `special-display-buffer-names',
3604 `special-display-regexps', `same-window-buffer-names', and
3605 `same-window-regexps' customize how certain buffer names are handled.
3606 The latter two take effect only if NOT-THIS-WINDOW is nil.
3608 If optional argument FRAME is `visible', search all visible frames.
3609 If FRAME is 0, search all visible and iconified frames.
3610 If FRAME is t, search all frames.
3611 If FRAME is a frame, search only that frame.
3612 If FRAME is nil, search only the selected frame
3613 (actually the last nonminibuffer frame),
3614 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,
3615 which means search visible and iconified frames.
3617 If a full-width window on a splittable frame is available to display
3618 the buffer, it may be split, subject to the value of the variable
3619 `split-height-threshold'.
3621 If `even-window-heights' is non-nil, window heights will be evened out
3622 if displaying the buffer causes two vertically adjacent windows to be
3624 (buffer
, not_this_window
, frame
)
3625 register Lisp_Object buffer
, not_this_window
, frame
;
3627 register Lisp_Object window
, tem
, swp
;
3631 buffer
= Fget_buffer (buffer
);
3632 CHECK_BUFFER (buffer
);
3634 if (!NILP (Vdisplay_buffer_function
))
3635 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
3637 if (NILP (not_this_window
)
3638 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
3639 return display_buffer_1 (selected_window
);
3641 /* See if the user has specified this buffer should appear
3642 in the selected window. */
3643 if (NILP (not_this_window
))
3645 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
3646 if (!NILP (swp
) && !no_switch_window (selected_window
))
3648 Fswitch_to_buffer (buffer
, Qnil
);
3649 return display_buffer_1 (selected_window
);
3653 /* If the user wants pop-up-frames or display-buffer-reuse-frames,
3654 look for a window showing BUFFER on any visible or iconified frame.
3655 Otherwise search only the current frame. */
3658 else if (pop_up_frames
3659 || display_buffer_reuse_frames
3660 || last_nonminibuf_frame
== 0)
3661 XSETFASTINT (tem
, 0);
3663 XSETFRAME (tem
, last_nonminibuf_frame
);
3665 window
= Fget_buffer_window (buffer
, tem
);
3667 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
3668 return display_buffer_1 (window
);
3670 /* Certain buffer names get special handling. */
3671 if (!NILP (Vspecial_display_function
) && NILP (swp
))
3673 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
3675 return call1 (Vspecial_display_function
, buffer
);
3677 return call2 (Vspecial_display_function
, buffer
, tem
);
3680 /* If there are no frames open that have more than a minibuffer,
3681 we need to create a new frame. */
3682 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
3684 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3685 Fset_window_buffer (window
, buffer
, Qnil
);
3686 return display_buffer_1 (window
);
3689 f
= SELECTED_FRAME ();
3691 || FRAME_MINIBUF_ONLY_P (f
)
3692 /* If the current frame is a special display frame,
3693 don't try to reuse its windows. */
3694 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
3699 if (FRAME_MINIBUF_ONLY_P (f
))
3700 XSETFRAME (frames
, last_nonminibuf_frame
);
3701 /* Don't try to create a window if we would get an error. */
3702 if (split_height_threshold
< window_min_height
<< 1)
3703 split_height_threshold
= window_min_height
<< 1;
3705 /* Note that both Fget_largest_window and Fget_lru_window
3706 ignore minibuffers and dedicated windows.
3707 This means they can return nil. */
3709 /* If the frame we would try to split cannot be split,
3710 try other frames. */
3711 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
3713 /* Try visible frames first. */
3714 window
= Fget_largest_window (Qvisible
, Qt
);
3715 /* If that didn't work, try iconified frames. */
3717 window
= Fget_largest_window (make_number (0), Qt
);
3718 #if 0 /* Don't try windows on other displays. */
3720 window
= Fget_largest_window (Qt
, Qt
);
3724 window
= Fget_largest_window (frames
, Qt
);
3726 /* If we got a tall enough full-width window that can be split,
3729 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3730 && window_height (window
) >= split_height_threshold
3731 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
3732 window
= Fsplit_window (window
, Qnil
, Qnil
);
3735 Lisp_Object upper
, lower
, other
;
3737 window
= Fget_lru_window (frames
, Qt
);
3738 /* If the LRU window is selected, and big enough,
3739 and can be split, split it. */
3741 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3742 && (EQ (window
, selected_window
)
3743 || EQ (XWINDOW (window
)->parent
, Qnil
))
3744 && window_height (window
) >= window_min_height
<< 1)
3745 window
= Fsplit_window (window
, Qnil
, Qnil
);
3747 window
= Fget_lru_window (frames
, Qnil
);
3748 /* If Fget_lru_window returned nil, try other approaches. */
3750 /* Try visible frames first. */
3752 window
= Fget_buffer_window (buffer
, Qvisible
);
3754 window
= Fget_largest_window (Qvisible
, Qnil
);
3755 /* If that didn't work, try iconified frames. */
3757 window
= Fget_buffer_window (buffer
, make_number (0));
3759 window
= Fget_largest_window (make_number (0), Qnil
);
3761 #if 0 /* Don't try frames on other displays. */
3763 window
= Fget_buffer_window (buffer
, Qt
);
3765 window
= Fget_largest_window (Qt
, Qnil
);
3767 /* As a last resort, make a new frame. */
3769 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3770 /* If window appears above or below another,
3771 even out their heights. */
3772 other
= upper
= lower
= Qnil
;
3773 if (!NILP (XWINDOW (window
)->prev
))
3774 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3775 if (!NILP (XWINDOW (window
)->next
))
3776 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3778 && !NILP (Veven_window_heights
)
3779 /* Check that OTHER and WINDOW are vertically arrayed. */
3780 && !EQ (XWINDOW (other
)->top_line
, XWINDOW (window
)->top_line
)
3781 && (XFASTINT (XWINDOW (other
)->total_lines
)
3782 > XFASTINT (XWINDOW (window
)->total_lines
)))
3784 int total
= (XFASTINT (XWINDOW (other
)->total_lines
)
3785 + XFASTINT (XWINDOW (window
)->total_lines
));
3786 enlarge_window (upper
,
3787 total
/ 2 - XFASTINT (XWINDOW (upper
)->total_lines
),
3793 window
= Fget_lru_window (Qnil
, Qnil
);
3795 Fset_window_buffer (window
, buffer
, Qnil
);
3796 return display_buffer_1 (window
);
3800 DEFUN ("force-window-update", Fforce_window_update
, Sforce_window_update
,
3802 doc
: /* Force all windows to be updated on next redisplay.
3803 If optional arg OBJECT is a window, force redisplay of that window only.
3804 If OBJECT is a buffer or buffer name, force redisplay of all windows
3805 displaying that buffer. */)
3811 windows_or_buffers_changed
++;
3812 update_mode_lines
++;
3816 if (WINDOWP (object
))
3818 struct window
*w
= XWINDOW (object
);
3819 mark_window_display_accurate (object
, 0);
3820 w
->update_mode_line
= Qt
;
3821 if (BUFFERP (w
->buffer
))
3822 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
3823 ++update_mode_lines
;
3827 if (STRINGP (object
))
3828 object
= Fget_buffer (object
);
3829 if (BUFFERP (object
) && !NILP (XBUFFER (object
)->name
))
3831 /* Walk all windows looking for buffer, and force update
3832 of each of those windows. */
3834 object
= window_loop (REDISPLAY_BUFFER_WINDOWS
, object
, 0, Qvisible
);
3835 return NILP (object
) ? Qnil
: Qt
;
3838 /* If nothing suitable was found, just return.
3839 We could signal an error, but this feature will typically be used
3840 asynchronously in timers or process sentinels, so we don't. */
3846 temp_output_buffer_show (buf
)
3847 register Lisp_Object buf
;
3849 register struct buffer
*old
= current_buffer
;
3850 register Lisp_Object window
;
3851 register struct window
*w
;
3853 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3856 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3860 #if 0 /* rms: there should be no reason for this. */
3861 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3863 set_buffer_internal (old
);
3865 if (!NILP (Vtemp_buffer_show_function
))
3866 call1 (Vtemp_buffer_show_function
, buf
);
3869 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3871 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3872 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3873 Vminibuf_scroll_window
= window
;
3874 w
= XWINDOW (window
);
3875 XSETFASTINT (w
->hscroll
, 0);
3876 XSETFASTINT (w
->min_hscroll
, 0);
3877 set_marker_restricted_both (w
->start
, buf
, BEG
, BEG
);
3878 set_marker_restricted_both (w
->pointm
, buf
, BEG
, BEG
);
3880 /* Run temp-buffer-show-hook, with the chosen window selected
3881 and its buffer current. */
3883 if (!NILP (Vrun_hooks
)
3884 && !NILP (Fboundp (Qtemp_buffer_show_hook
))
3885 && !NILP (Fsymbol_value (Qtemp_buffer_show_hook
)))
3887 int count
= SPECPDL_INDEX ();
3888 Lisp_Object prev_window
, prev_buffer
;
3889 prev_window
= selected_window
;
3890 XSETBUFFER (prev_buffer
, old
);
3892 /* Select the window that was chosen, for running the hook.
3893 Note: Both Fselect_window and select_window_norecord may
3894 set-buffer to the buffer displayed in the window,
3895 so we need to save the current buffer. --stef */
3896 record_unwind_protect (Fset_buffer
, prev_buffer
);
3897 record_unwind_protect (select_window_norecord
, prev_window
);
3898 Fselect_window (window
, Qt
);
3899 Fset_buffer (w
->buffer
);
3900 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3901 unbind_to (count
, Qnil
);
3907 make_dummy_parent (window
)
3911 register struct window
*o
, *p
;
3914 o
= XWINDOW (window
);
3915 p
= allocate_window ();
3916 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3917 ((struct Lisp_Vector
*) p
)->contents
[i
]
3918 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3919 XSETWINDOW (new, p
);
3922 XSETFASTINT (p
->sequence_number
, sequence_number
);
3924 /* Put new into window structure in place of window */
3925 replace_window (window
, new);
3938 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3939 doc
: /* Split WINDOW, putting SIZE lines in the first of the pair.
3940 WINDOW defaults to selected one and SIZE to half its size.
3941 If optional third arg HORFLAG is non-nil, split side by side
3942 and put SIZE columns in the first of the pair. In that case,
3943 SIZE includes that window's scroll bar, or the divider column to its right.
3944 Interactively, all arguments are nil.
3946 Returns the newly created window (which is the lower or rightmost one).
3947 The upper or leftmost window is the original one, and remains selected
3948 if it was selected before.
3950 See Info node `(elisp)Splitting Windows' for more details and examples.*/)
3951 (window
, size
, horflag
)
3952 Lisp_Object window
, size
, horflag
;
3954 register Lisp_Object
new;
3955 register struct window
*o
, *p
;
3957 register int size_int
;
3960 window
= selected_window
;
3962 CHECK_LIVE_WINDOW (window
);
3964 o
= XWINDOW (window
);
3965 fo
= XFRAME (WINDOW_FRAME (o
));
3969 if (!NILP (horflag
))
3970 /* Calculate the size of the left-hand window, by dividing
3971 the usable space in columns by two.
3972 We round up, since the left-hand window may include
3973 a dividing line, while the right-hand may not. */
3974 size_int
= (XFASTINT (o
->total_cols
) + 1) >> 1;
3976 size_int
= XFASTINT (o
->total_lines
) >> 1;
3980 CHECK_NUMBER (size
);
3981 size_int
= XINT (size
);
3984 if (MINI_WINDOW_P (o
))
3985 error ("Attempt to split minibuffer window");
3986 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3987 error ("Attempt to split fixed-size window");
3989 check_min_window_sizes ();
3993 if (size_int
< window_min_height
)
3994 error ("Window height %d too small (after splitting)", size_int
);
3995 if (size_int
+ window_min_height
> XFASTINT (o
->total_lines
))
3996 error ("Window height %d too small (after splitting)",
3997 XFASTINT (o
->total_lines
) - size_int
);
3998 if (NILP (o
->parent
)
3999 || NILP (XWINDOW (o
->parent
)->vchild
))
4001 make_dummy_parent (window
);
4003 XWINDOW (new)->vchild
= window
;
4008 if (size_int
< window_min_width
)
4009 error ("Window width %d too small (after splitting)", size_int
);
4011 if (size_int
+ window_min_width
> XFASTINT (o
->total_cols
))
4012 error ("Window width %d too small (after splitting)",
4013 XFASTINT (o
->total_cols
) - size_int
);
4014 if (NILP (o
->parent
)
4015 || NILP (XWINDOW (o
->parent
)->hchild
))
4017 make_dummy_parent (window
);
4019 XWINDOW (new)->hchild
= window
;
4023 /* Now we know that window's parent is a vertical combination
4024 if we are dividing vertically, or a horizontal combination
4025 if we are making side-by-side windows */
4027 windows_or_buffers_changed
++;
4028 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
4029 new = make_window ();
4032 p
->frame
= o
->frame
;
4034 if (!NILP (p
->next
))
4035 XWINDOW (p
->next
)->prev
= new;
4038 p
->parent
= o
->parent
;
4040 p
->window_end_valid
= Qnil
;
4041 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
4043 /* Duplicate special geometry settings. */
4045 p
->left_margin_cols
= o
->left_margin_cols
;
4046 p
->right_margin_cols
= o
->right_margin_cols
;
4047 p
->left_fringe_width
= o
->left_fringe_width
;
4048 p
->right_fringe_width
= o
->right_fringe_width
;
4049 p
->fringes_outside_margins
= o
->fringes_outside_margins
;
4050 p
->scroll_bar_width
= o
->scroll_bar_width
;
4051 p
->vertical_scroll_bar_type
= o
->vertical_scroll_bar_type
;
4053 /* Apportion the available frame space among the two new windows */
4055 if (!NILP (horflag
))
4057 p
->total_lines
= o
->total_lines
;
4058 p
->top_line
= o
->top_line
;
4059 XSETFASTINT (p
->total_cols
, XFASTINT (o
->total_cols
) - size_int
);
4060 XSETFASTINT (o
->total_cols
, size_int
);
4061 XSETFASTINT (p
->left_col
, XFASTINT (o
->left_col
) + size_int
);
4062 adjust_window_margins (p
);
4063 adjust_window_margins (o
);
4067 p
->left_col
= o
->left_col
;
4068 p
->total_cols
= o
->total_cols
;
4069 XSETFASTINT (p
->total_lines
, XFASTINT (o
->total_lines
) - size_int
);
4070 XSETFASTINT (o
->total_lines
, size_int
);
4071 XSETFASTINT (p
->top_line
, XFASTINT (o
->top_line
) + size_int
);
4074 /* Adjust glyph matrices. */
4077 Fset_window_buffer (new, o
->buffer
, Qt
);
4081 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
4082 doc
: /* Make current window ARG lines bigger.
4083 From program, optional second arg non-nil means grow sideways ARG columns.
4084 Interactively, if an argument is not given, make the window one line bigger.
4085 If HORIZONTAL is non-nil, enlarge horizontally instead of vertically.
4086 This function can delete windows, even the second window, if they get
4089 Lisp_Object arg
, horizontal
;
4092 enlarge_window (selected_window
, XINT (arg
), !NILP (horizontal
));
4094 if (! NILP (Vwindow_configuration_change_hook
))
4095 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4100 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
4101 doc
: /* Make current window ARG lines smaller.
4102 From program, optional second arg non-nil means shrink sideways arg columns.
4103 Interactively, if an argument is not given, make the window one line smaller. Only
4104 siblings to the right or below are changed. */)
4106 Lisp_Object arg
, side
;
4109 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
4111 if (! NILP (Vwindow_configuration_change_hook
))
4112 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4118 window_height (window
)
4121 register struct window
*p
= XWINDOW (window
);
4122 return WINDOW_TOTAL_LINES (p
);
4126 window_width (window
)
4129 register struct window
*p
= XWINDOW (window
);
4130 return WINDOW_TOTAL_COLS (p
);
4135 *(horiz_flag ? &(XWINDOW (w)->left_col) : &(XWINDOW (w)->top_line))
4137 #define CURSIZE(w) \
4138 *(horiz_flag ? &(XWINDOW (w)->total_cols) : &(XWINDOW (w)->total_lines))
4141 /* Enlarge WINDOW by DELTA.
4142 HORIZ_FLAG nonzero means enlarge it horizontally;
4143 zero means do it vertically.
4145 Siblings of the selected window are resized to fulfill the size
4146 request. If they become too small in the process, they will be
4150 enlarge_window (window
, delta
, horiz_flag
)
4152 int delta
, horiz_flag
;
4154 Lisp_Object parent
, next
, prev
;
4158 int (*sizefun
) P_ ((Lisp_Object
))
4159 = horiz_flag
? window_width
: window_height
;
4160 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
4161 = (horiz_flag
? set_window_width
: set_window_height
);
4163 /* Check values of window_min_width and window_min_height for
4165 check_min_window_sizes ();
4167 /* Give up if this window cannot be resized. */
4168 if (window_fixed_size_p (XWINDOW (window
), horiz_flag
, 1))
4169 error ("Window is not resizable");
4171 /* Find the parent of the selected window. */
4174 p
= XWINDOW (window
);
4180 error ("No other window to side of this one");
4185 ? !NILP (XWINDOW (parent
)->hchild
)
4186 : !NILP (XWINDOW (parent
)->vchild
))
4192 sizep
= &CURSIZE (window
);
4195 register int maxdelta
;
4197 /* Compute the maximum size increment this window can have. */
4199 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
4200 /* This is a main window followed by a minibuffer. */
4201 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
4202 - window_min_size (XWINDOW (p
->next
),
4204 /* This is a minibuffer following a main window. */
4205 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
4206 - window_min_size (XWINDOW (p
->prev
),
4208 /* This is a frame with only one window, a minibuffer-only
4209 or a minibufferless frame. */
4212 if (delta
> maxdelta
)
4213 /* This case traps trying to make the minibuffer
4214 the full frame, or make the only window aside from the
4215 minibuffer the full frame. */
4219 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), horiz_flag
, 0, 0))
4221 delete_window (window
);
4228 /* Find the total we can get from other siblings without deleting them. */
4230 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
4231 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
4233 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
4234 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
4237 /* If we can get it all from them without deleting them, do so. */
4238 if (delta
<= maximum
)
4240 Lisp_Object first_unaffected
;
4241 Lisp_Object first_affected
;
4246 first_affected
= window
;
4247 /* Look at one sibling at a time,
4248 moving away from this window in both directions alternately,
4249 and take as much as we can get without deleting that sibling. */
4251 && (!NILP (next
) || !NILP (prev
)))
4255 int this_one
= ((*sizefun
) (next
)
4256 - window_min_size (XWINDOW (next
),
4257 horiz_flag
, 0, &fixed_p
));
4260 if (this_one
> delta
)
4263 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
4264 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4269 next
= XWINDOW (next
)->next
;
4277 int this_one
= ((*sizefun
) (prev
)
4278 - window_min_size (XWINDOW (prev
),
4279 horiz_flag
, 0, &fixed_p
));
4282 if (this_one
> delta
)
4285 first_affected
= prev
;
4287 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
4288 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4293 prev
= XWINDOW (prev
)->prev
;
4297 xassert (delta
== 0);
4299 /* Now recalculate the edge positions of all the windows affected,
4300 based on the new sizes. */
4301 first_unaffected
= next
;
4302 prev
= first_affected
;
4303 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
4304 prev
= next
, next
= XWINDOW (next
)->next
)
4306 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
4307 /* This does not change size of NEXT,
4308 but it propagates the new top edge to its children */
4309 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
4314 register int delta1
;
4315 register int opht
= (*sizefun
) (parent
);
4317 if (opht
<= XINT (*sizep
) + delta
)
4319 /* If trying to grow this window to or beyond size of the parent,
4320 just delete all the sibling windows. */
4321 Lisp_Object start
, tem
, next
;
4323 start
= XWINDOW (parent
)->vchild
;
4325 start
= XWINDOW (parent
)->hchild
;
4327 /* Delete any siblings that come after WINDOW. */
4328 tem
= XWINDOW (window
)->next
;
4329 while (! NILP (tem
))
4331 next
= XWINDOW (tem
)->next
;
4332 delete_window (tem
);
4336 /* Delete any siblings that come after WINDOW.
4337 Note that if START is not WINDOW, then WINDOW still
4338 Fhas siblings, so WINDOW has not yet replaced its parent. */
4340 while (! EQ (tem
, window
))
4342 next
= XWINDOW (tem
)->next
;
4343 delete_window (tem
);
4349 /* Otherwise, make delta1 just right so that if we add
4350 delta1 lines to this window and to the parent, and then
4351 shrink the parent back to its original size, the new
4352 proportional size of this window will increase by delta.
4354 The function size_window will compute the new height h'
4355 of the window from delta1 as:
4358 x = delta1 - delta1/n * n for the 1st resizable child
4361 where n is the number of children that can be resized.
4362 We can ignore x by choosing a delta1 that is a multiple of
4363 n. We want the height of this window to come out as
4373 The number of children n equals the number of resizable
4374 children of this window + 1 because we know window itself
4375 is resizable (otherwise we would have signalled an error). */
4377 struct window
*w
= XWINDOW (window
);
4381 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
4382 if (!window_fixed_size_p (XWINDOW (s
), horiz_flag
, 0))
4384 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
4385 if (!window_fixed_size_p (XWINDOW (s
), horiz_flag
, 0))
4390 /* Add delta1 lines or columns to this window, and to the parent,
4391 keeping things consistent while not affecting siblings. */
4392 XSETINT (CURSIZE (parent
), opht
+ delta1
);
4393 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
4395 /* Squeeze out delta1 lines or columns from our parent,
4396 shriking this window and siblings proportionately.
4397 This brings parent back to correct size.
4398 Delta1 was calculated so this makes this window the desired size,
4399 taking it all out of the siblings. */
4400 (*setsizefun
) (parent
, opht
, 0);
4405 XSETFASTINT (p
->last_modified
, 0);
4406 XSETFASTINT (p
->last_overlay_modified
, 0);
4408 /* Adjust glyph matrices. */
4409 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4413 /* Adjust the size of WINDOW by DELTA, moving only its trailing edge.
4414 HORIZ_FLAG nonzero means adjust the width, moving the right edge.
4415 zero means adjust the height, moving the bottom edge.
4417 Following siblings of the selected window are resized to fulfill
4418 the size request. If they become too small in the process, they
4419 are not deleted; instead, we signal an error. */
4422 adjust_window_trailing_edge (window
, delta
, horiz_flag
)
4424 int delta
, horiz_flag
;
4426 Lisp_Object parent
, child
;
4428 Lisp_Object old_config
= Fcurrent_window_configuration (Qnil
);
4429 int delcount
= window_deletion_count
;
4431 /* Check values of window_min_width and window_min_height for
4433 check_min_window_sizes ();
4436 window
= Fselected_window ();
4438 CHECK_WINDOW (window
);
4440 /* Give up if this window cannot be resized. */
4441 if (window_fixed_size_p (XWINDOW (window
), horiz_flag
, 1))
4442 error ("Window is not resizable");
4446 Lisp_Object first_parallel
= Qnil
;
4450 /* This happens if WINDOW on the previous iteration was
4451 at top level of the window tree. */
4452 Fset_window_configuration (old_config
);
4453 error ("Specified window edge is fixed");
4456 p
= XWINDOW (window
);
4459 /* See if this level has windows in parallel in the specified
4460 direction. If so, set FIRST_PARALLEL to the first one. */
4463 if (! NILP (parent
) && !NILP (XWINDOW (parent
)->vchild
))
4464 first_parallel
= XWINDOW (parent
)->vchild
;
4465 else if (NILP (parent
) && !NILP (p
->next
))
4467 /* Handle the vertical chain of main window and minibuffer
4468 which has no parent. */
4469 first_parallel
= window
;
4470 while (! NILP (XWINDOW (first_parallel
)->prev
))
4471 first_parallel
= XWINDOW (first_parallel
)->prev
;
4476 if (! NILP (parent
) && !NILP (XWINDOW (parent
)->hchild
))
4477 first_parallel
= XWINDOW (parent
)->hchild
;
4480 /* If this level's succession is in the desired dimension,
4481 and this window is the last one, and there is no higher level,
4482 its trailing edge is fixed. */
4483 if (NILP (XWINDOW (window
)->next
) && NILP (first_parallel
)
4486 Fset_window_configuration (old_config
);
4487 error ("Specified window edge is fixed");
4490 /* Don't make this window too small. */
4491 if (XINT (CURSIZE (window
)) + delta
4492 < (horiz_flag
? window_min_width
: window_min_height
))
4494 Fset_window_configuration (old_config
);
4495 error ("Cannot adjust window size as specified");
4498 /* Clear out some redisplay caches. */
4499 XSETFASTINT (p
->last_modified
, 0);
4500 XSETFASTINT (p
->last_overlay_modified
, 0);
4502 /* Adjust this window's edge. */
4503 XSETINT (CURSIZE (window
),
4504 XINT (CURSIZE (window
)) + delta
);
4506 /* If this window has following siblings in the desired dimension,
4507 make them smaller, and exit the loop.
4509 (If we reach the top of the tree and can never do this,
4510 we will fail and report an error, above.) */
4511 if (NILP (first_parallel
))
4513 if (!NILP (p
->next
))
4515 /* This may happen for the minibuffer. In that case
4516 the window_deletion_count check below does not work. */
4517 if (XINT (CURSIZE (p
->next
)) - delta
<= 0)
4519 Fset_window_configuration (old_config
);
4520 error ("Cannot adjust window size as specified");
4523 XSETINT (CURBEG (p
->next
),
4524 XINT (CURBEG (p
->next
)) + delta
);
4525 size_window (p
->next
, XINT (CURSIZE (p
->next
)) - delta
,
4526 horiz_flag
, 0, 1, 0);
4531 /* Here we have a chain of parallel siblings, in the other dimension.
4532 Change the size of the other siblings. */
4533 for (child
= first_parallel
;
4535 child
= XWINDOW (child
)->next
)
4536 if (! EQ (child
, window
))
4537 size_window (child
, XINT (CURSIZE (child
)) + delta
,
4538 horiz_flag
, 0, 0, 1);
4543 /* If we made a window so small it got deleted,
4544 we failed. Report failure. */
4545 if (delcount
!= window_deletion_count
)
4547 Fset_window_configuration (old_config
);
4548 error ("Cannot adjust window size as specified");
4551 /* Adjust glyph matrices. */
4552 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4558 DEFUN ("adjust-window-trailing-edge", Fadjust_window_trailing_edge
,
4559 Sadjust_window_trailing_edge
, 3, 3, 0,
4560 doc
: /* Adjust the bottom or right edge of WINDOW by DELTA.
4561 If HORIZONTAL is non-nil, that means adjust the width, moving the right edge.
4562 Otherwise, adjust the height, moving the bottom edge.
4564 Following siblings of the selected window are resized to fulfill
4565 the size request. If they become too small in the process, they
4566 are not deleted; instead, we signal an error. */)
4567 (window
, delta
, horizontal
)
4568 Lisp_Object window
, delta
, horizontal
;
4570 CHECK_NUMBER (delta
);
4571 adjust_window_trailing_edge (window
, XINT (delta
), !NILP (horizontal
));
4573 if (! NILP (Vwindow_configuration_change_hook
))
4574 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4581 /***********************************************************************
4582 Resizing Mini-Windows
4583 ***********************************************************************/
4585 static void shrink_window_lowest_first
P_ ((struct window
*, int));
4587 enum save_restore_action
4594 static int save_restore_orig_size
P_ ((struct window
*,
4595 enum save_restore_action
));
4597 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
4598 from lowest windows first. */
4601 shrink_window_lowest_first (w
, height
)
4609 xassert (!MINI_WINDOW_P (w
));
4611 /* Set redisplay hints. */
4612 XSETFASTINT (w
->last_modified
, 0);
4613 XSETFASTINT (w
->last_overlay_modified
, 0);
4614 windows_or_buffers_changed
++;
4615 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
4617 old_height
= XFASTINT (w
->total_lines
);
4618 XSETFASTINT (w
->total_lines
, height
);
4620 if (!NILP (w
->hchild
))
4622 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
4624 c
= XWINDOW (child
);
4625 c
->top_line
= w
->top_line
;
4626 shrink_window_lowest_first (c
, height
);
4629 else if (!NILP (w
->vchild
))
4631 Lisp_Object last_child
;
4632 int delta
= old_height
- height
;
4637 /* Find the last child. We are taking space from lowest windows
4638 first, so we iterate over children from the last child
4640 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
4643 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
4644 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
4648 c
= XWINDOW (child
);
4649 this_one
= XFASTINT (c
->total_lines
) - MIN_SAFE_WINDOW_HEIGHT
;
4651 if (this_one
> delta
)
4654 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
) - this_one
);
4658 /* Compute new positions. */
4659 last_top
= XINT (w
->top_line
);
4660 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
4662 c
= XWINDOW (child
);
4663 c
->top_line
= make_number (last_top
);
4664 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
));
4665 last_top
+= XFASTINT (c
->total_lines
);
4671 /* Save, restore, or check positions and sizes in the window tree
4672 rooted at W. ACTION says what to do.
4674 If ACTION is CHECK_ORIG_SIZES, check if orig_top_line and
4675 orig_total_lines members are valid for all windows in the window
4676 tree. Value is non-zero if they are valid.
4678 If ACTION is SAVE_ORIG_SIZES, save members top and height in
4679 orig_top_line and orig_total_lines for all windows in the tree.
4681 If ACTION is RESTORE_ORIG_SIZES, restore top and height from values
4682 stored in orig_top_line and orig_total_lines for all windows. */
4685 save_restore_orig_size (w
, action
)
4687 enum save_restore_action action
;
4693 if (!NILP (w
->hchild
))
4695 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
4698 else if (!NILP (w
->vchild
))
4700 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
4706 case CHECK_ORIG_SIZES
:
4707 if (!INTEGERP (w
->orig_top_line
) || !INTEGERP (w
->orig_total_lines
))
4711 case SAVE_ORIG_SIZES
:
4712 w
->orig_top_line
= w
->top_line
;
4713 w
->orig_total_lines
= w
->total_lines
;
4714 XSETFASTINT (w
->last_modified
, 0);
4715 XSETFASTINT (w
->last_overlay_modified
, 0);
4718 case RESTORE_ORIG_SIZES
:
4719 xassert (INTEGERP (w
->orig_top_line
) && INTEGERP (w
->orig_total_lines
));
4720 w
->top_line
= w
->orig_top_line
;
4721 w
->total_lines
= w
->orig_total_lines
;
4722 w
->orig_total_lines
= w
->orig_top_line
= Qnil
;
4723 XSETFASTINT (w
->last_modified
, 0);
4724 XSETFASTINT (w
->last_overlay_modified
, 0);
4731 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
4738 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
4739 without deleting other windows. */
4742 grow_mini_window (w
, delta
)
4746 struct frame
*f
= XFRAME (w
->frame
);
4747 struct window
*root
;
4749 xassert (MINI_WINDOW_P (w
));
4750 xassert (delta
>= 0);
4752 /* Check values of window_min_width and window_min_height for
4754 check_min_window_sizes ();
4756 /* Compute how much we can enlarge the mini-window without deleting
4758 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4761 int min_height
= window_min_size (root
, 0, 0, 0);
4762 if (XFASTINT (root
->total_lines
) - delta
< min_height
)
4763 /* Note that the root window may already be smaller than
4765 delta
= max (0, XFASTINT (root
->total_lines
) - min_height
);
4770 /* Save original window sizes and positions, if not already done. */
4771 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4772 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
4774 /* Shrink other windows. */
4775 shrink_window_lowest_first (root
, XFASTINT (root
->total_lines
) - delta
);
4777 /* Grow the mini-window. */
4778 w
->top_line
= make_number (XFASTINT (root
->top_line
) + XFASTINT (root
->total_lines
));
4779 w
->total_lines
= make_number (XFASTINT (w
->total_lines
) + delta
);
4780 XSETFASTINT (w
->last_modified
, 0);
4781 XSETFASTINT (w
->last_overlay_modified
, 0);
4788 /* Shrink mini-window W. If there is recorded info about window sizes
4789 before a call to grow_mini_window, restore recorded window sizes.
4790 Otherwise, if the mini-window is higher than 1 line, resize it to 1
4794 shrink_mini_window (w
)
4797 struct frame
*f
= XFRAME (w
->frame
);
4798 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4800 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4802 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
4804 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4805 windows_or_buffers_changed
= 1;
4807 else if (XFASTINT (w
->total_lines
) > 1)
4809 /* Distribute the additional lines of the mini-window
4810 among the other windows. */
4812 XSETWINDOW (window
, w
);
4813 enlarge_window (window
, 1 - XFASTINT (w
->total_lines
), 0);
4819 /* Mark window cursors off for all windows in the window tree rooted
4820 at W by setting their phys_cursor_on_p flag to zero. Called from
4821 xterm.c, e.g. when a frame is cleared and thereby all cursors on
4822 the frame are cleared. */
4825 mark_window_cursors_off (w
)
4830 if (!NILP (w
->hchild
))
4831 mark_window_cursors_off (XWINDOW (w
->hchild
));
4832 else if (!NILP (w
->vchild
))
4833 mark_window_cursors_off (XWINDOW (w
->vchild
));
4835 w
->phys_cursor_on_p
= 0;
4837 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4842 /* Return number of lines of text (not counting mode lines) in W. */
4845 window_internal_height (w
)
4848 int ht
= XFASTINT (w
->total_lines
);
4850 if (!MINI_WINDOW_P (w
))
4852 if (!NILP (w
->parent
)
4853 || !NILP (w
->vchild
)
4854 || !NILP (w
->hchild
)
4857 || WINDOW_WANTS_MODELINE_P (w
))
4860 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4868 /* Return the number of columns in W.
4869 Don't count columns occupied by scroll bars or the vertical bar
4870 separating W from the sibling to its right. */
4873 window_box_text_cols (w
)
4876 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4877 int width
= XINT (w
->total_cols
);
4879 if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w
))
4880 /* Scroll bars occupy a few columns. */
4881 width
-= WINDOW_CONFIG_SCROLL_BAR_COLS (w
);
4882 else if (!FRAME_WINDOW_P (f
)
4883 && !WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
4884 /* The column of `|' characters separating side-by-side windows
4885 occupies one column only. */
4888 if (FRAME_WINDOW_P (f
))
4889 /* On window-systems, fringes and display margins cannot be
4890 used for normal text. */
4891 width
-= (WINDOW_FRINGE_COLS (w
)
4892 + WINDOW_LEFT_MARGIN_COLS (w
)
4893 + WINDOW_RIGHT_MARGIN_COLS (w
));
4899 /************************************************************************
4901 ***********************************************************************/
4903 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
4904 N screen-fulls, which is defined as the height of the window minus
4905 next_screen_context_lines. If WHOLE is zero, scroll up N lines
4906 instead. Negative values of N mean scroll down. NOERROR non-zero
4907 means don't signal an error if we try to move over BEGV or ZV,
4911 window_scroll (window
, n
, whole
, noerror
)
4919 /* If we must, use the pixel-based version which is much slower than
4920 the line-based one but can handle varying line heights. */
4921 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
4922 window_scroll_pixel_based (window
, n
, whole
, noerror
);
4924 window_scroll_line_based (window
, n
, whole
, noerror
);
4930 /* Implementation of window_scroll that works based on pixel line
4931 heights. See the comment of window_scroll for parameter
4935 window_scroll_pixel_based (window
, n
, whole
, noerror
)
4942 struct window
*w
= XWINDOW (window
);
4943 struct text_pos start
;
4944 int this_scroll_margin
;
4945 /* True if we fiddled the window vscroll field without really scrolling. */
4947 int x
, y
, rtop
, rbot
, rowh
, vpos
;
4949 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4951 /* If PT is not visible in WINDOW, move back one half of
4952 the screen. Allow PT to be partially visible, otherwise
4953 something like (scroll-down 1) with PT in the line before
4954 the partially visible one would recenter. */
4956 if (!pos_visible_p (w
, PT
, &x
, &y
, &rtop
, &rbot
, &rowh
, &vpos
))
4958 /* Move backward half the height of the window. Performance note:
4959 vmotion used here is about 10% faster, but would give wrong
4960 results for variable height lines. */
4961 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4962 it
.current_y
= it
.last_visible_y
;
4963 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
4965 /* The function move_iterator_vertically may move over more than
4966 the specified y-distance. If it->w is small, e.g. a
4967 mini-buffer window, we may end up in front of the window's
4968 display area. This is the case when Start displaying at the
4969 start of the line containing PT in this case. */
4970 if (it
.current_y
<= 0)
4972 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4973 move_it_vertically_backward (&it
, 0);
4977 start
= it
.current
.pos
;
4979 else if (auto_window_vscroll_p
)
4981 if (rtop
|| rbot
) /* partially visible */
4984 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4986 dy
= max ((window_box_height (w
)
4987 - next_screen_context_lines
* dy
),
4993 /* Only vscroll backwards if already vscrolled forwards. */
4994 if (w
->vscroll
< 0 && rtop
> 0)
4996 px
= max (0, -w
->vscroll
- min (rtop
, -dy
));
4997 Fset_window_vscroll (window
, make_number (px
), Qt
);
5003 /* Do vscroll if already vscrolled or only display line. */
5004 if (rbot
> 0 && (w
->vscroll
< 0 || vpos
== 0))
5006 px
= max (0, -w
->vscroll
+ min (rbot
, dy
));
5007 Fset_window_vscroll (window
, make_number (px
), Qt
);
5011 /* Maybe modify window start instead of scrolling. */
5012 if (rbot
> 0 || w
->vscroll
< 0)
5016 Fset_window_vscroll (window
, make_number (0), Qt
);
5017 /* If there are other text lines above the current row,
5018 move window start to current row. Else to next row. */
5020 spos
= XINT (Fline_beginning_position (Qnil
));
5022 spos
= min (XINT (Fline_end_position (Qnil
)) + 1, ZV
);
5023 set_marker_restricted (w
->start
, make_number (spos
),
5025 w
->start_at_line_beg
= Qt
;
5026 w
->update_mode_line
= Qt
;
5027 XSETFASTINT (w
->last_modified
, 0);
5028 XSETFASTINT (w
->last_overlay_modified
, 0);
5029 /* Set force_start so that redisplay_window will run the
5030 window-scroll-functions. */
5031 w
->force_start
= Qt
;
5036 /* Cancel previous vscroll. */
5037 Fset_window_vscroll (window
, make_number (0), Qt
);
5040 /* If scroll_preserve_screen_position is non-nil, we try to set
5041 point in the same window line as it is now, so get that line. */
5042 if (!NILP (Vscroll_preserve_screen_position
))
5044 /* We preserve the goal pixel coordinate across consecutive
5045 calls to scroll-up or scroll-down. This avoids the
5046 possibility of point becoming "stuck" on a tall line when
5047 scrolling by one line. */
5048 if (window_scroll_pixel_based_preserve_y
< 0
5049 || (!EQ (current_kboard
->Vlast_command
, Qscroll_up
)
5050 && !EQ (current_kboard
->Vlast_command
, Qscroll_down
)))
5052 start_display (&it
, w
, start
);
5053 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
5054 window_scroll_pixel_based_preserve_y
= it
.current_y
;
5058 window_scroll_pixel_based_preserve_y
= -1;
5060 /* Move iterator it from start the specified distance forward or
5061 backward. The result is the new window start. */
5062 start_display (&it
, w
, start
);
5065 int start_pos
= IT_CHARPOS (it
);
5066 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
5067 dy
= max ((window_box_height (w
)
5068 - next_screen_context_lines
* dy
),
5071 /* Note that move_it_vertically always moves the iterator to the
5072 start of a line. So, if the last line doesn't have a newline,
5073 we would end up at the start of the line ending at ZV. */
5076 move_it_vertically_backward (&it
, -dy
);
5077 /* Ensure we actually do move, e.g. in case we are currently
5078 looking at an image that is taller that the window height. */
5079 while (start_pos
== IT_CHARPOS (it
)
5080 && start_pos
> BEGV
)
5081 move_it_by_lines (&it
, -1, 1);
5085 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
5086 MOVE_TO_POS
| MOVE_TO_Y
);
5087 /* Ensure we actually do move, e.g. in case we are currently
5088 looking at an image that is taller that the window height. */
5089 while (start_pos
== IT_CHARPOS (it
)
5091 move_it_by_lines (&it
, 1, 1);
5095 move_it_by_lines (&it
, n
, 1);
5097 /* We failed if we find ZV is already on the screen (scrolling up,
5098 means there's nothing past the end), or if we can't start any
5099 earlier (scrolling down, means there's nothing past the top). */
5100 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
5101 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
5103 if (IT_CHARPOS (it
) == ZV
)
5105 if (it
.current_y
< it
.last_visible_y
5106 && (it
.current_y
+ it
.max_ascent
+ it
.max_descent
5107 > it
.last_visible_y
))
5109 /* The last line was only partially visible, make it fully
5111 w
->vscroll
= (it
.last_visible_y
5112 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
5113 adjust_glyphs (it
.f
);
5117 else if (n
< 0) /* could happen with empty buffers */
5118 xsignal0 (Qbeginning_of_buffer
);
5120 xsignal0 (Qend_of_buffer
);
5124 if (w
->vscroll
!= 0)
5125 /* The first line was only partially visible, make it fully
5131 xsignal0 (Qbeginning_of_buffer
);
5134 /* If control gets here, then we vscrolled. */
5136 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5138 /* Don't try to change the window start below. */
5144 int pos
= IT_CHARPOS (it
);
5147 /* If in the middle of a multi-glyph character move forward to
5148 the next character. */
5149 if (in_display_vector_p (&it
))
5152 move_it_to (&it
, pos
, -1, -1, -1, MOVE_TO_POS
);
5155 /* Set the window start, and set up the window for redisplay. */
5156 set_marker_restricted (w
->start
, make_number (pos
),
5158 bytepos
= XMARKER (w
->start
)->bytepos
;
5159 w
->start_at_line_beg
= ((pos
== BEGV
|| FETCH_BYTE (bytepos
- 1) == '\n')
5161 w
->update_mode_line
= Qt
;
5162 XSETFASTINT (w
->last_modified
, 0);
5163 XSETFASTINT (w
->last_overlay_modified
, 0);
5164 /* Set force_start so that redisplay_window will run the
5165 window-scroll-functions. */
5166 w
->force_start
= Qt
;
5169 /* The rest of this function uses current_y in a nonstandard way,
5170 not including the height of the header line if any. */
5171 it
.current_y
= it
.vpos
= 0;
5173 /* Move PT out of scroll margins.
5174 This code wants current_y to be zero at the window start position
5175 even if there is a header line. */
5176 this_scroll_margin
= max (0, scroll_margin
);
5177 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->total_lines
) / 4);
5178 this_scroll_margin
*= FRAME_LINE_HEIGHT (it
.f
);
5182 /* We moved the window start towards ZV, so PT may be now
5183 in the scroll margin at the top. */
5184 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
5185 if (IT_CHARPOS (it
) == PT
&& it
.current_y
>= this_scroll_margin
5186 && (NILP (Vscroll_preserve_screen_position
)
5187 || EQ (Vscroll_preserve_screen_position
, Qt
)))
5188 /* We found PT at a legitimate height. Leave it alone. */
5190 else if (window_scroll_pixel_based_preserve_y
>= 0)
5192 /* If we have a header line, take account of it.
5193 This is necessary because we set it.current_y to 0, above. */
5194 move_it_to (&it
, -1, -1,
5195 window_scroll_pixel_based_preserve_y
5196 - (WINDOW_WANTS_HEADER_LINE_P (w
) ? 1 : 0 ),
5198 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5202 while (it
.current_y
< this_scroll_margin
)
5204 int prev
= it
.current_y
;
5205 move_it_by_lines (&it
, 1, 1);
5206 if (prev
== it
.current_y
)
5209 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5214 int charpos
, bytepos
;
5217 /* Save our position, for the
5218 window_scroll_pixel_based_preserve_y case. */
5219 charpos
= IT_CHARPOS (it
);
5220 bytepos
= IT_BYTEPOS (it
);
5222 /* We moved the window start towards BEGV, so PT may be now
5223 in the scroll margin at the bottom. */
5224 move_it_to (&it
, PT
, -1,
5225 (it
.last_visible_y
- CURRENT_HEADER_LINE_HEIGHT (w
)
5226 - this_scroll_margin
- 1),
5228 MOVE_TO_POS
| MOVE_TO_Y
);
5230 /* Save our position, in case it's correct. */
5231 charpos
= IT_CHARPOS (it
);
5232 bytepos
= IT_BYTEPOS (it
);
5234 /* See if point is on a partially visible line at the end. */
5235 if (it
.what
== IT_EOB
)
5236 partial_p
= it
.current_y
+ it
.ascent
+ it
.descent
> it
.last_visible_y
;
5239 move_it_by_lines (&it
, 1, 1);
5240 partial_p
= it
.current_y
> it
.last_visible_y
;
5243 if (charpos
== PT
&& !partial_p
5244 && (NILP (Vscroll_preserve_screen_position
)
5245 || EQ (Vscroll_preserve_screen_position
, Qt
)))
5246 /* We found PT before we found the display margin, so PT is ok. */
5248 else if (window_scroll_pixel_based_preserve_y
>= 0)
5250 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5251 start_display (&it
, w
, start
);
5252 /* It would be wrong to subtract CURRENT_HEADER_LINE_HEIGHT
5253 here because we called start_display again and did not
5254 alter it.current_y this time. */
5255 move_it_to (&it
, -1, -1, window_scroll_pixel_based_preserve_y
, -1,
5257 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5262 /* The last line was only partially visible, so back up two
5263 lines to make sure we're on a fully visible line. */
5265 move_it_by_lines (&it
, -2, 0);
5266 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5269 /* No, the position we saved is OK, so use it. */
5270 SET_PT_BOTH (charpos
, bytepos
);
5276 /* Implementation of window_scroll that works based on screen lines.
5277 See the comment of window_scroll for parameter descriptions. */
5280 window_scroll_line_based (window
, n
, whole
, noerror
)
5286 register struct window
*w
= XWINDOW (window
);
5287 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
5288 register int pos
, pos_byte
;
5289 register int ht
= window_internal_height (w
);
5290 register Lisp_Object tem
;
5294 struct position posit
;
5297 /* If scrolling screen-fulls, compute the number of lines to
5298 scroll from the window's height. */
5300 n
*= max (1, ht
- next_screen_context_lines
);
5302 startpos
= marker_position (w
->start
);
5304 posit
= *compute_motion (startpos
, 0, 0, 0,
5306 -1, XINT (w
->hscroll
),
5308 original_vpos
= posit
.vpos
;
5310 XSETFASTINT (tem
, PT
);
5311 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
5315 Fvertical_motion (make_number (- (ht
/ 2)), window
);
5320 lose
= n
< 0 && PT
== BEGV
;
5321 Fvertical_motion (make_number (n
), window
);
5325 SET_PT_BOTH (opoint
, opoint_byte
);
5332 xsignal0 (Qbeginning_of_buffer
);
5337 int this_scroll_margin
= scroll_margin
;
5339 /* Don't use a scroll margin that is negative or too large. */
5340 if (this_scroll_margin
< 0)
5341 this_scroll_margin
= 0;
5343 if (XINT (w
->total_lines
) < 4 * scroll_margin
)
5344 this_scroll_margin
= XINT (w
->total_lines
) / 4;
5346 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
5347 w
->start_at_line_beg
= bolp
;
5348 w
->update_mode_line
= Qt
;
5349 XSETFASTINT (w
->last_modified
, 0);
5350 XSETFASTINT (w
->last_overlay_modified
, 0);
5351 /* Set force_start so that redisplay_window will run
5352 the window-scroll-functions. */
5353 w
->force_start
= Qt
;
5355 if (!NILP (Vscroll_preserve_screen_position
)
5356 && (whole
|| !EQ (Vscroll_preserve_screen_position
, Qt
)))
5358 SET_PT_BOTH (pos
, pos_byte
);
5359 Fvertical_motion (make_number (original_vpos
), window
);
5361 /* If we scrolled forward, put point enough lines down
5362 that it is outside the scroll margin. */
5367 if (this_scroll_margin
> 0)
5369 SET_PT_BOTH (pos
, pos_byte
);
5370 Fvertical_motion (make_number (this_scroll_margin
), window
);
5376 if (top_margin
<= opoint
)
5377 SET_PT_BOTH (opoint
, opoint_byte
);
5378 else if (!NILP (Vscroll_preserve_screen_position
))
5380 SET_PT_BOTH (pos
, pos_byte
);
5381 Fvertical_motion (make_number (original_vpos
), window
);
5384 SET_PT (top_margin
);
5390 /* If we scrolled backward, put point near the end of the window
5391 but not within the scroll margin. */
5392 SET_PT_BOTH (pos
, pos_byte
);
5393 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
5394 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
5397 bottom_margin
= PT
+ 1;
5399 if (bottom_margin
> opoint
)
5400 SET_PT_BOTH (opoint
, opoint_byte
);
5403 if (!NILP (Vscroll_preserve_screen_position
))
5405 SET_PT_BOTH (pos
, pos_byte
);
5406 Fvertical_motion (make_number (original_vpos
), window
);
5409 Fvertical_motion (make_number (-1), window
);
5418 xsignal0 (Qend_of_buffer
);
5423 /* Scroll selected_window up or down. If N is nil, scroll a
5424 screen-full which is defined as the height of the window minus
5425 next_screen_context_lines. If N is the symbol `-', scroll.
5426 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
5427 up. This is the guts of Fscroll_up and Fscroll_down. */
5430 scroll_command (n
, direction
)
5434 int count
= SPECPDL_INDEX ();
5436 xassert (abs (direction
) == 1);
5438 /* If selected window's buffer isn't current, make it current for
5439 the moment. But don't screw up if window_scroll gets an error. */
5440 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
5442 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5443 Fset_buffer (XWINDOW (selected_window
)->buffer
);
5445 /* Make redisplay consider other windows than just selected_window. */
5446 ++windows_or_buffers_changed
;
5450 window_scroll (selected_window
, direction
, 1, 0);
5451 else if (EQ (n
, Qminus
))
5452 window_scroll (selected_window
, -direction
, 1, 0);
5455 n
= Fprefix_numeric_value (n
);
5456 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
5459 unbind_to (count
, Qnil
);
5462 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
5463 doc
: /* Scroll text of current window upward ARG lines.
5464 If ARG is omitted or nil, scroll upward by a near full screen.
5465 A near full screen is `next-screen-context-lines' less than a full screen.
5466 Negative ARG means scroll downward.
5467 If ARG is the atom `-', scroll downward by nearly full screen.
5468 When calling from a program, supply as argument a number, nil, or `-'. */)
5472 scroll_command (arg
, 1);
5476 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
5477 doc
: /* Scroll text of current window down ARG lines.
5478 If ARG is omitted or nil, scroll down by a near full screen.
5479 A near full screen is `next-screen-context-lines' less than a full screen.
5480 Negative ARG means scroll upward.
5481 If ARG is the atom `-', scroll upward by nearly full screen.
5482 When calling from a program, supply as argument a number, nil, or `-'. */)
5486 scroll_command (arg
, -1);
5490 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
5491 doc
: /* Return the other window for \"other window scroll\" commands.
5492 If `other-window-scroll-buffer' is non-nil, a window
5493 showing that buffer is used.
5494 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5495 specifies the window. This takes precedence over
5496 `other-window-scroll-buffer'. */)
5501 if (MINI_WINDOW_P (XWINDOW (selected_window
))
5502 && !NILP (Vminibuf_scroll_window
))
5503 window
= Vminibuf_scroll_window
;
5504 /* If buffer is specified, scroll that buffer. */
5505 else if (!NILP (Vother_window_scroll_buffer
))
5507 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
5509 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
5513 /* Nothing specified; look for a neighboring window on the same
5515 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
5517 if (EQ (window
, selected_window
))
5518 /* That didn't get us anywhere; look for a window on another
5521 window
= Fnext_window (window
, Qnil
, Qt
);
5522 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
5523 && ! EQ (window
, selected_window
));
5526 CHECK_LIVE_WINDOW (window
);
5528 if (EQ (window
, selected_window
))
5529 error ("There is no other window");
5534 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
5535 doc
: /* Scroll next window upward ARG lines; or near full screen if no ARG.
5536 A near full screen is `next-screen-context-lines' less than a full screen.
5537 The next window is the one below the current one; or the one at the top
5538 if the current one is at the bottom. Negative ARG means scroll downward.
5539 If ARG is the atom `-', scroll downward by nearly full screen.
5540 When calling from a program, supply as argument a number, nil, or `-'.
5542 If `other-window-scroll-buffer' is non-nil, scroll the window
5543 showing that buffer, popping the buffer up if necessary.
5544 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5545 specifies the window to scroll. This takes precedence over
5546 `other-window-scroll-buffer'. */)
5552 int count
= SPECPDL_INDEX ();
5554 window
= Fother_window_for_scrolling ();
5555 w
= XWINDOW (window
);
5557 /* Don't screw up if window_scroll gets an error. */
5558 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5559 ++windows_or_buffers_changed
;
5561 Fset_buffer (w
->buffer
);
5562 SET_PT (marker_position (w
->pointm
));
5565 window_scroll (window
, 1, 1, 1);
5566 else if (EQ (arg
, Qminus
))
5567 window_scroll (window
, -1, 1, 1);
5573 window_scroll (window
, XINT (arg
), 0, 1);
5576 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
5577 unbind_to (count
, Qnil
);
5582 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 2, "P\np",
5583 doc
: /* Scroll selected window display ARG columns left.
5584 Default for ARG is window width minus 2.
5585 Value is the total amount of leftward horizontal scrolling in
5586 effect after the change.
5587 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5588 lower bound for automatic scrolling, i.e. automatic scrolling
5589 will not scroll a window to a column less than the value returned
5590 by this function. This happens in an interactive call. */)
5592 register Lisp_Object arg
, set_minimum
;
5596 struct window
*w
= XWINDOW (selected_window
);
5599 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5601 arg
= Fprefix_numeric_value (arg
);
5603 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
5604 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5606 if (!NILP (set_minimum
))
5607 w
->min_hscroll
= w
->hscroll
;
5612 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 2, "P\np",
5613 doc
: /* Scroll selected window display ARG columns right.
5614 Default for ARG is window width minus 2.
5615 Value is the total amount of leftward horizontal scrolling in
5616 effect after the change.
5617 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5618 lower bound for automatic scrolling, i.e. automatic scrolling
5619 will not scroll a window to a column less than the value returned
5620 by this function. This happens in an interactive call. */)
5622 register Lisp_Object arg
, set_minimum
;
5626 struct window
*w
= XWINDOW (selected_window
);
5629 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5631 arg
= Fprefix_numeric_value (arg
);
5633 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
5634 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5636 if (!NILP (set_minimum
))
5637 w
->min_hscroll
= w
->hscroll
;
5642 DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window
, Sminibuffer_selected_window
, 0, 0, 0,
5643 doc
: /* Return the window which was selected when entering the minibuffer.
5644 Returns nil, if current window is not a minibuffer window. */)
5647 if (minibuf_level
> 0
5648 && MINI_WINDOW_P (XWINDOW (selected_window
))
5649 && WINDOW_LIVE_P (minibuf_selected_window
))
5650 return minibuf_selected_window
;
5655 /* Value is the number of lines actually displayed in window W,
5656 as opposed to its height. */
5659 displayed_window_lines (w
)
5663 struct text_pos start
;
5664 int height
= window_box_height (w
);
5665 struct buffer
*old_buffer
;
5668 if (XBUFFER (w
->buffer
) != current_buffer
)
5670 old_buffer
= current_buffer
;
5671 set_buffer_internal (XBUFFER (w
->buffer
));
5676 /* In case W->start is out of the accessible range, do something
5677 reasonable. This happens in Info mode when Info-scroll-down
5678 calls (recenter -1) while W->start is 1. */
5679 if (XMARKER (w
->start
)->charpos
< BEGV
)
5680 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
5681 else if (XMARKER (w
->start
)->charpos
> ZV
)
5682 SET_TEXT_POS (start
, ZV
, ZV_BYTE
);
5684 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5686 start_display (&it
, w
, start
);
5687 move_it_vertically (&it
, height
);
5688 bottom_y
= line_bottom_y (&it
);
5690 /* rms: On a non-window display,
5691 the value of it.vpos at the bottom of the screen
5692 seems to be 1 larger than window_box_height (w).
5693 This kludge fixes a bug whereby (move-to-window-line -1)
5694 when ZV is on the last screen line
5695 moves to the previous screen line instead of the last one. */
5696 if (! FRAME_WINDOW_P (XFRAME (w
->frame
)))
5699 /* Add in empty lines at the bottom of the window. */
5700 if (bottom_y
< height
)
5702 int uy
= FRAME_LINE_HEIGHT (it
.f
);
5703 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
5707 set_buffer_internal (old_buffer
);
5713 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
5714 doc
: /* Center point in window and redisplay frame.
5715 With prefix argument ARG, recenter putting point on screen line ARG
5716 relative to the current window. If ARG is negative, it counts up from the
5717 bottom of the window. (ARG should be less than the height of the window.)
5719 If ARG is omitted or nil, erase the entire frame and then
5720 redraw with point in the center of the current window.
5721 Just C-u as prefix means put point in the center of the window
5722 and redisplay normally--don't erase and redraw the frame. */)
5724 register Lisp_Object arg
;
5726 struct window
*w
= XWINDOW (selected_window
);
5727 struct buffer
*buf
= XBUFFER (w
->buffer
);
5728 struct buffer
*obuf
= current_buffer
;
5730 int charpos
, bytepos
;
5732 int this_scroll_margin
;
5734 /* If redisplay is suppressed due to an error, try again. */
5735 obuf
->display_error_modiff
= 0;
5741 /* Invalidate pixel data calculated for all compositions. */
5742 for (i
= 0; i
< n_compositions
; i
++)
5743 composition_table
[i
]->font
= NULL
;
5745 Fredraw_frame (w
->frame
);
5746 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
5749 else if (CONSP (arg
)) /* Just C-u. */
5753 arg
= Fprefix_numeric_value (arg
);
5758 set_buffer_internal (buf
);
5760 /* Do this after making BUF current
5761 in case scroll_margin is buffer-local. */
5762 this_scroll_margin
= max (0, scroll_margin
);
5763 this_scroll_margin
= min (this_scroll_margin
,
5764 XFASTINT (w
->total_lines
) / 4);
5766 /* Handle centering on a graphical frame specially. Such frames can
5767 have variable-height lines and centering point on the basis of
5768 line counts would lead to strange effects. */
5769 if (FRAME_WINDOW_P (XFRAME (w
->frame
)))
5776 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5777 start_display (&it
, w
, pt
);
5778 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
5779 charpos
= IT_CHARPOS (it
);
5780 bytepos
= IT_BYTEPOS (it
);
5787 int extra_line_spacing
;
5788 int h
= window_box_height (w
);
5790 iarg
= - max (-iarg
, this_scroll_margin
);
5792 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5793 start_display (&it
, w
, pt
);
5795 /* Be sure we have the exact height of the full line containing PT. */
5796 move_it_by_lines (&it
, 0, 1);
5798 /* The amount of pixels we have to move back is the window
5799 height minus what's displayed in the line containing PT,
5800 and the lines below. */
5803 move_it_by_lines (&it
, nlines
, 1);
5805 if (it
.vpos
== nlines
)
5809 /* Last line has no newline */
5810 h
-= line_bottom_y (&it
);
5814 /* Don't reserve space for extra line spacing of last line. */
5815 extra_line_spacing
= it
.max_extra_line_spacing
;
5817 /* If we can't move down NLINES lines because we hit
5818 the end of the buffer, count in some empty lines. */
5819 if (it
.vpos
< nlines
)
5822 extra_line_spacing
= it
.extra_line_spacing
;
5823 h
-= nlines
* (FRAME_LINE_HEIGHT (it
.f
) + extra_line_spacing
);
5828 /* Now find the new top line (starting position) of the window. */
5829 start_display (&it
, w
, pt
);
5831 move_it_vertically_backward (&it
, h
);
5833 /* If extra line spacing is present, we may move too far
5834 back. This causes the last line to be only partially
5835 visible (which triggers redisplay to recenter that line
5836 in the middle), so move forward.
5837 But ignore extra line spacing on last line, as it is not
5838 considered to be part of the visible height of the line.
5840 h
+= extra_line_spacing
;
5841 while (-it
.current_y
> h
)
5842 move_it_by_lines (&it
, 1, 1);
5844 charpos
= IT_CHARPOS (it
);
5845 bytepos
= IT_BYTEPOS (it
);
5849 struct position pos
;
5851 iarg
= max (iarg
, this_scroll_margin
);
5853 pos
= *vmotion (PT
, -iarg
, w
);
5854 charpos
= pos
.bufpos
;
5855 bytepos
= pos
.bytepos
;
5860 struct position pos
;
5861 int ht
= window_internal_height (w
);
5868 /* Don't let it get into the margin at either top or bottom. */
5869 iarg
= max (iarg
, this_scroll_margin
);
5870 iarg
= min (iarg
, ht
- this_scroll_margin
- 1);
5872 pos
= *vmotion (PT
, - iarg
, w
);
5873 charpos
= pos
.bufpos
;
5874 bytepos
= pos
.bytepos
;
5877 /* Set the new window start. */
5878 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
5879 w
->window_end_valid
= Qnil
;
5881 w
->optional_new_start
= Qt
;
5883 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
5884 w
->start_at_line_beg
= Qt
;
5886 w
->start_at_line_beg
= Qnil
;
5888 set_buffer_internal (obuf
);
5893 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
5895 doc
: /* Return the height in lines of the text display area of WINDOW.
5896 This doesn't include the mode-line (or header-line if any) or any
5897 partial-height lines in the text display area. */)
5901 struct window
*w
= decode_window (window
);
5902 int pixel_height
= window_box_height (w
);
5903 int line_height
= pixel_height
/ FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
5904 return make_number (line_height
);
5909 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
5911 doc
: /* Position point relative to window.
5912 With no argument, position point at center of window.
5913 An argument specifies vertical position within the window;
5914 zero means top of window, negative means relative to bottom of window. */)
5918 struct window
*w
= XWINDOW (selected_window
);
5922 int this_scroll_margin
;
5925 window
= selected_window
;
5926 start
= marker_position (w
->start
);
5927 if (start
< BEGV
|| start
> ZV
)
5929 int height
= window_internal_height (w
);
5930 Fvertical_motion (make_number (- (height
/ 2)), window
);
5931 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
5932 w
->start_at_line_beg
= Fbolp ();
5933 w
->force_start
= Qt
;
5936 Fgoto_char (w
->start
);
5938 lines
= displayed_window_lines (w
);
5941 this_scroll_margin
= max (0, scroll_margin
);
5942 this_scroll_margin
= min (this_scroll_margin
, lines
/ 4);
5946 XSETFASTINT (arg
, lines
/ 2);
5949 int iarg
= XINT (Fprefix_numeric_value (arg
));
5952 iarg
= iarg
+ lines
;
5954 #if 0 /* This code would prevent move-to-window-line from moving point
5955 to a place inside the scroll margins (which would cause the
5956 next redisplay to scroll). I wrote this code, but then concluded
5957 it is probably better not to install it. However, it is here
5958 inside #if 0 so as not to lose it. -- rms. */
5960 /* Don't let it get into the margin at either top or bottom. */
5961 iarg
= max (iarg
, this_scroll_margin
);
5962 iarg
= min (iarg
, lines
- this_scroll_margin
- 1);
5965 arg
= make_number (iarg
);
5968 /* Skip past a partially visible first line. */
5970 XSETINT (arg
, XINT (arg
) + 1);
5972 return Fvertical_motion (arg
, window
);
5977 /***********************************************************************
5978 Window Configuration
5979 ***********************************************************************/
5981 struct save_window_data
5983 EMACS_INT size_from_Lisp_Vector_struct
;
5984 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
5985 Lisp_Object frame_cols
, frame_lines
, frame_menu_bar_lines
;
5986 Lisp_Object frame_tool_bar_lines
;
5987 Lisp_Object selected_frame
;
5988 Lisp_Object current_window
;
5989 Lisp_Object current_buffer
;
5990 Lisp_Object minibuf_scroll_window
;
5991 Lisp_Object minibuf_selected_window
;
5992 Lisp_Object root_window
;
5993 Lisp_Object focus_frame
;
5994 /* Record the values of window-min-width and window-min-height
5995 so that window sizes remain consistent with them. */
5996 Lisp_Object min_width
, min_height
;
5997 /* A vector, each of whose elements is a struct saved_window
5999 Lisp_Object saved_windows
;
6002 /* This is saved as a Lisp_Vector */
6005 /* these first two must agree with struct Lisp_Vector in lisp.h */
6006 EMACS_INT size_from_Lisp_Vector_struct
;
6007 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
6010 Lisp_Object buffer
, start
, pointm
, mark
;
6011 Lisp_Object left_col
, top_line
, total_cols
, total_lines
;
6012 Lisp_Object hscroll
, min_hscroll
;
6013 Lisp_Object parent
, prev
;
6014 Lisp_Object start_at_line_beg
;
6015 Lisp_Object display_table
;
6016 Lisp_Object orig_top_line
, orig_total_lines
;
6017 Lisp_Object left_margin_cols
, right_margin_cols
;
6018 Lisp_Object left_fringe_width
, right_fringe_width
, fringes_outside_margins
;
6019 Lisp_Object scroll_bar_width
, vertical_scroll_bar_type
;
6020 Lisp_Object dedicated
;
6023 #define SAVED_WINDOW_N(swv,n) \
6024 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
6026 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
6027 doc
: /* Return t if OBJECT is a window-configuration object. */)
6031 return WINDOW_CONFIGURATIONP (object
) ? Qt
: Qnil
;
6034 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
6035 doc
: /* Return the frame that CONFIG, a window-configuration object, is about. */)
6039 register struct save_window_data
*data
;
6040 struct Lisp_Vector
*saved_windows
;
6042 CHECK_WINDOW_CONFIGURATION (config
);
6044 data
= (struct save_window_data
*) XVECTOR (config
);
6045 saved_windows
= XVECTOR (data
->saved_windows
);
6046 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
6049 DEFUN ("set-window-configuration", Fset_window_configuration
,
6050 Sset_window_configuration
, 1, 1, 0,
6051 doc
: /* Set the configuration of windows and buffers as specified by CONFIGURATION.
6052 CONFIGURATION must be a value previously returned
6053 by `current-window-configuration' (which see).
6054 If CONFIGURATION was made from a frame that is now deleted,
6055 only frame-independent values can be restored. In this case,
6056 the return value is nil. Otherwise the value is t. */)
6058 Lisp_Object configuration
;
6060 register struct save_window_data
*data
;
6061 struct Lisp_Vector
*saved_windows
;
6062 Lisp_Object new_current_buffer
;
6067 CHECK_WINDOW_CONFIGURATION (configuration
);
6069 data
= (struct save_window_data
*) XVECTOR (configuration
);
6070 saved_windows
= XVECTOR (data
->saved_windows
);
6072 new_current_buffer
= data
->current_buffer
;
6073 if (NILP (XBUFFER (new_current_buffer
)->name
))
6074 new_current_buffer
= Qnil
;
6077 if (XBUFFER (new_current_buffer
) == current_buffer
)
6078 /* The code further down "preserves point" by saving here PT in
6079 old_point and then setting it later back into PT. When the
6080 current-selected-window and the final-selected-window both show
6081 the current buffer, this suffers from the problem that the
6082 current PT is the window-point of the current-selected-window,
6083 while the final PT is the point of the final-selected-window, so
6084 this copy from one PT to the other would end up moving the
6085 window-point of the final-selected-window to the window-point of
6086 the current-selected-window. So we have to be careful which
6087 point of the current-buffer we copy into old_point. */
6088 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
6089 && WINDOWP (selected_window
)
6090 && EQ (XWINDOW (selected_window
)->buffer
, new_current_buffer
)
6091 && !EQ (selected_window
, data
->current_window
))
6092 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
6096 /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of
6097 point in new_current_buffer as of the last time this buffer was
6098 used. This can be non-deterministic since it can be changed by
6099 things like jit-lock by mere temporary selection of some random
6100 window that happens to show this buffer.
6101 So if possible we want this arbitrary choice of "which point" to
6102 be the one from the to-be-selected-window so as to prevent this
6103 window's cursor from being copied from another window. */
6104 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
6105 /* If current_window = selected_window, its point is in BUF_PT. */
6106 && !EQ (selected_window
, data
->current_window
))
6107 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
6109 old_point
= BUF_PT (XBUFFER (new_current_buffer
));
6112 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
6115 /* If f is a dead frame, don't bother rebuilding its window tree.
6116 However, there is other stuff we should still try to do below. */
6117 if (FRAME_LIVE_P (f
))
6119 register struct window
*w
;
6120 register struct saved_window
*p
;
6121 struct window
*root_window
;
6122 struct window
**leaf_windows
;
6126 /* If the frame has been resized since this window configuration was
6127 made, we change the frame to the size specified in the
6128 configuration, restore the configuration, and then resize it
6129 back. We keep track of the prevailing height in these variables. */
6130 int previous_frame_lines
= FRAME_LINES (f
);
6131 int previous_frame_cols
= FRAME_COLS (f
);
6132 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
6133 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
6135 /* The mouse highlighting code could get screwed up
6136 if it runs during this. */
6139 if (XFASTINT (data
->frame_lines
) != previous_frame_lines
6140 || XFASTINT (data
->frame_cols
) != previous_frame_cols
)
6141 change_frame_size (f
, XFASTINT (data
->frame_lines
),
6142 XFASTINT (data
->frame_cols
), 0, 0, 0);
6143 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
6144 if (XFASTINT (data
->frame_menu_bar_lines
)
6145 != previous_frame_menu_bar_lines
)
6146 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
6147 #ifdef HAVE_WINDOW_SYSTEM
6148 if (XFASTINT (data
->frame_tool_bar_lines
)
6149 != previous_frame_tool_bar_lines
)
6150 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
6154 /* "Swap out" point from the selected window's buffer
6155 into the window itself. (Normally the pointm of the selected
6156 window holds garbage.) We do this now, before
6157 restoring the window contents, and prevent it from
6158 being done later on when we select a new window. */
6159 if (! NILP (XWINDOW (selected_window
)->buffer
))
6161 w
= XWINDOW (selected_window
);
6162 set_marker_both (w
->pointm
,
6164 BUF_PT (XBUFFER (w
->buffer
)),
6165 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6168 windows_or_buffers_changed
++;
6169 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
6171 /* Problem: Freeing all matrices and later allocating them again
6172 is a serious redisplay flickering problem. What we would
6173 really like to do is to free only those matrices not reused
6175 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
6177 = (struct window
**) alloca (count_windows (root_window
)
6178 * sizeof (struct window
*));
6179 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
6181 /* Temporarily avoid any problems with windows that are smaller
6182 than they are supposed to be. */
6183 window_min_height
= 1;
6184 window_min_width
= 1;
6187 Mark all windows now on frame as "deleted".
6188 Restoring the new configuration "undeletes" any that are in it.
6190 Save their current buffers in their height fields, since we may
6191 need it later, if a buffer saved in the configuration is now
6193 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6195 for (k
= 0; k
< saved_windows
->size
; k
++)
6197 p
= SAVED_WINDOW_N (saved_windows
, k
);
6198 w
= XWINDOW (p
->window
);
6201 if (!NILP (p
->parent
))
6202 w
->parent
= SAVED_WINDOW_N (saved_windows
,
6203 XFASTINT (p
->parent
))->window
;
6207 if (!NILP (p
->prev
))
6209 w
->prev
= SAVED_WINDOW_N (saved_windows
,
6210 XFASTINT (p
->prev
))->window
;
6211 XWINDOW (w
->prev
)->next
= p
->window
;
6216 if (!NILP (w
->parent
))
6218 if (EQ (p
->total_cols
, XWINDOW (w
->parent
)->total_cols
))
6220 XWINDOW (w
->parent
)->vchild
= p
->window
;
6221 XWINDOW (w
->parent
)->hchild
= Qnil
;
6225 XWINDOW (w
->parent
)->hchild
= p
->window
;
6226 XWINDOW (w
->parent
)->vchild
= Qnil
;
6231 /* If we squirreled away the buffer in the window's height,
6233 if (BUFFERP (w
->total_lines
))
6234 w
->buffer
= w
->total_lines
;
6235 w
->left_col
= p
->left_col
;
6236 w
->top_line
= p
->top_line
;
6237 w
->total_cols
= p
->total_cols
;
6238 w
->total_lines
= p
->total_lines
;
6239 w
->hscroll
= p
->hscroll
;
6240 w
->min_hscroll
= p
->min_hscroll
;
6241 w
->display_table
= p
->display_table
;
6242 w
->orig_top_line
= p
->orig_top_line
;
6243 w
->orig_total_lines
= p
->orig_total_lines
;
6244 w
->left_margin_cols
= p
->left_margin_cols
;
6245 w
->right_margin_cols
= p
->right_margin_cols
;
6246 w
->left_fringe_width
= p
->left_fringe_width
;
6247 w
->right_fringe_width
= p
->right_fringe_width
;
6248 w
->fringes_outside_margins
= p
->fringes_outside_margins
;
6249 w
->scroll_bar_width
= p
->scroll_bar_width
;
6250 w
->vertical_scroll_bar_type
= p
->vertical_scroll_bar_type
;
6251 w
->dedicated
= p
->dedicated
;
6252 XSETFASTINT (w
->last_modified
, 0);
6253 XSETFASTINT (w
->last_overlay_modified
, 0);
6255 /* Reinstall the saved buffer and pointers into it. */
6256 if (NILP (p
->buffer
))
6257 w
->buffer
= p
->buffer
;
6260 if (!NILP (XBUFFER (p
->buffer
)->name
))
6261 /* If saved buffer is alive, install it. */
6263 w
->buffer
= p
->buffer
;
6264 w
->start_at_line_beg
= p
->start_at_line_beg
;
6265 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
6266 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
6267 Fset_marker (XBUFFER (w
->buffer
)->mark
,
6268 p
->mark
, w
->buffer
);
6270 /* As documented in Fcurrent_window_configuration, don't
6271 restore the location of point in the buffer which was
6272 current when the window configuration was recorded. */
6273 if (!EQ (p
->buffer
, new_current_buffer
)
6274 && XBUFFER (p
->buffer
) == current_buffer
)
6275 Fgoto_char (w
->pointm
);
6277 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
6278 /* Else unless window has a live buffer, get one. */
6280 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
6281 /* This will set the markers to beginning of visible
6283 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
6284 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
6285 w
->start_at_line_beg
= Qt
;
6288 /* Keeping window's old buffer; make sure the markers
6291 /* Set window markers at start of visible range. */
6292 if (XMARKER (w
->start
)->buffer
== 0)
6293 set_marker_restricted (w
->start
, make_number (0),
6295 if (XMARKER (w
->pointm
)->buffer
== 0)
6296 set_marker_restricted_both (w
->pointm
, w
->buffer
,
6297 BUF_PT (XBUFFER (w
->buffer
)),
6298 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6299 w
->start_at_line_beg
= Qt
;
6304 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
6305 /* Prevent "swapping out point" in the old selected window
6306 using the buffer that has been restored into it.
6307 We already swapped out point that from that window's old buffer. */
6308 selected_window
= Qnil
;
6310 /* Arrange *not* to restore point in the buffer that was
6311 current when the window configuration was saved. */
6312 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
))
6313 set_marker_restricted (XWINDOW (data
->current_window
)->pointm
,
6314 make_number (old_point
),
6315 XWINDOW (data
->current_window
)->buffer
);
6317 Fselect_window (data
->current_window
, Qnil
);
6318 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
6321 if (NILP (data
->focus_frame
)
6322 || (FRAMEP (data
->focus_frame
)
6323 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
6324 Fredirect_frame_focus (frame
, data
->focus_frame
);
6326 #if 0 /* I don't understand why this is needed, and it causes problems
6327 when the frame's old selected window has been deleted. */
6328 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
6329 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
6333 /* Set the screen height to the value it had before this function. */
6334 if (previous_frame_lines
!= FRAME_LINES (f
)
6335 || previous_frame_cols
!= FRAME_COLS (f
))
6336 change_frame_size (f
, previous_frame_lines
, previous_frame_cols
,
6338 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
6339 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
6340 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
6342 #ifdef HAVE_WINDOW_SYSTEM
6343 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
6344 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
6349 /* Now, free glyph matrices in windows that were not reused. */
6350 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
6352 if (NILP (leaf_windows
[i
]->buffer
))
6354 /* Assert it's not reused as a combination. */
6355 xassert (NILP (leaf_windows
[i
]->hchild
)
6356 && NILP (leaf_windows
[i
]->vchild
));
6357 free_window_matrices (leaf_windows
[i
]);
6359 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
6367 /* Fselect_window will have made f the selected frame, so we
6368 reselect the proper frame here. Fhandle_switch_frame will change the
6369 selected window too, but that doesn't make the call to
6370 Fselect_window above totally superfluous; it still sets f's
6372 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
6373 do_switch_frame (data
->selected_frame
, 0, 0);
6375 if (! NILP (Vwindow_configuration_change_hook
)
6376 && ! NILP (Vrun_hooks
))
6377 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
6380 if (!NILP (new_current_buffer
))
6381 Fset_buffer (new_current_buffer
);
6383 /* Restore the minimum heights recorded in the configuration. */
6384 window_min_height
= XINT (data
->min_height
);
6385 window_min_width
= XINT (data
->min_width
);
6387 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
6388 minibuf_selected_window
= data
->minibuf_selected_window
;
6390 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
6393 /* Mark all windows now on frame as deleted
6394 by setting their buffers to nil. */
6397 delete_all_subwindows (w
)
6398 register struct window
*w
;
6400 if (!NILP (w
->next
))
6401 delete_all_subwindows (XWINDOW (w
->next
));
6402 if (!NILP (w
->vchild
))
6403 delete_all_subwindows (XWINDOW (w
->vchild
));
6404 if (!NILP (w
->hchild
))
6405 delete_all_subwindows (XWINDOW (w
->hchild
));
6407 w
->total_lines
= w
->buffer
; /* See Fset_window_configuration for excuse. */
6409 if (!NILP (w
->buffer
))
6412 /* We set all three of these fields to nil, to make sure that we can
6413 distinguish this dead window from any live window. Live leaf
6414 windows will have buffer set, and combination windows will have
6415 vchild or hchild set. */
6420 Vwindow_list
= Qnil
;
6424 count_windows (window
)
6425 register struct window
*window
;
6427 register int count
= 1;
6428 if (!NILP (window
->next
))
6429 count
+= count_windows (XWINDOW (window
->next
));
6430 if (!NILP (window
->vchild
))
6431 count
+= count_windows (XWINDOW (window
->vchild
));
6432 if (!NILP (window
->hchild
))
6433 count
+= count_windows (XWINDOW (window
->hchild
));
6438 /* Fill vector FLAT with leaf windows under W, starting at index I.
6439 Value is last index + 1. */
6442 get_leaf_windows (w
, flat
, i
)
6444 struct window
**flat
;
6449 if (!NILP (w
->hchild
))
6450 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
6451 else if (!NILP (w
->vchild
))
6452 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
6456 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6463 /* Return a pointer to the glyph W's physical cursor is on. Value is
6464 null if W's current matrix is invalid, so that no meaningfull glyph
6468 get_phys_cursor_glyph (w
)
6471 struct glyph_row
*row
;
6472 struct glyph
*glyph
;
6474 if (w
->phys_cursor
.vpos
>= 0
6475 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
6476 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
6478 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
6479 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
6488 save_window_save (window
, vector
, i
)
6490 struct Lisp_Vector
*vector
;
6493 register struct saved_window
*p
;
6494 register struct window
*w
;
6495 register Lisp_Object tem
;
6497 for (;!NILP (window
); window
= w
->next
)
6499 p
= SAVED_WINDOW_N (vector
, i
);
6500 w
= XWINDOW (window
);
6502 XSETFASTINT (w
->temslot
, i
); i
++;
6504 p
->buffer
= w
->buffer
;
6505 p
->left_col
= w
->left_col
;
6506 p
->top_line
= w
->top_line
;
6507 p
->total_cols
= w
->total_cols
;
6508 p
->total_lines
= w
->total_lines
;
6509 p
->hscroll
= w
->hscroll
;
6510 p
->min_hscroll
= w
->min_hscroll
;
6511 p
->display_table
= w
->display_table
;
6512 p
->orig_top_line
= w
->orig_top_line
;
6513 p
->orig_total_lines
= w
->orig_total_lines
;
6514 p
->left_margin_cols
= w
->left_margin_cols
;
6515 p
->right_margin_cols
= w
->right_margin_cols
;
6516 p
->left_fringe_width
= w
->left_fringe_width
;
6517 p
->right_fringe_width
= w
->right_fringe_width
;
6518 p
->fringes_outside_margins
= w
->fringes_outside_margins
;
6519 p
->scroll_bar_width
= w
->scroll_bar_width
;
6520 p
->vertical_scroll_bar_type
= w
->vertical_scroll_bar_type
;
6521 p
->dedicated
= w
->dedicated
;
6522 if (!NILP (w
->buffer
))
6524 /* Save w's value of point in the window configuration.
6525 If w is the selected window, then get the value of point
6526 from the buffer; pointm is garbage in the selected window. */
6527 if (EQ (window
, selected_window
))
6529 p
->pointm
= Fmake_marker ();
6530 set_marker_both (p
->pointm
, w
->buffer
,
6531 BUF_PT (XBUFFER (w
->buffer
)),
6532 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6535 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
6537 p
->start
= Fcopy_marker (w
->start
, Qnil
);
6538 p
->start_at_line_beg
= w
->start_at_line_beg
;
6540 tem
= XBUFFER (w
->buffer
)->mark
;
6541 p
->mark
= Fcopy_marker (tem
, Qnil
);
6548 p
->start_at_line_beg
= Qnil
;
6551 if (NILP (w
->parent
))
6554 p
->parent
= XWINDOW (w
->parent
)->temslot
;
6559 p
->prev
= XWINDOW (w
->prev
)->temslot
;
6561 if (!NILP (w
->vchild
))
6562 i
= save_window_save (w
->vchild
, vector
, i
);
6563 if (!NILP (w
->hchild
))
6564 i
= save_window_save (w
->hchild
, vector
, i
);
6570 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
6571 Scurrent_window_configuration
, 0, 1, 0,
6572 doc
: /* Return an object representing the current window configuration of FRAME.
6573 If FRAME is nil or omitted, use the selected frame.
6574 This describes the number of windows, their sizes and current buffers,
6575 and for each displayed buffer, where display starts, and the positions of
6576 point and mark. An exception is made for point in the current buffer:
6577 its value is -not- saved.
6578 This also records the currently selected frame, and FRAME's focus
6579 redirection (see `redirect-frame-focus'). */)
6583 register Lisp_Object tem
;
6584 register int n_windows
;
6585 register struct save_window_data
*data
;
6586 register struct Lisp_Vector
*vec
;
6591 frame
= selected_frame
;
6592 CHECK_LIVE_FRAME (frame
);
6595 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6596 vec
= allocate_other_vector (VECSIZE (struct save_window_data
));
6597 data
= (struct save_window_data
*)vec
;
6599 XSETFASTINT (data
->frame_cols
, FRAME_COLS (f
));
6600 XSETFASTINT (data
->frame_lines
, FRAME_LINES (f
));
6601 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
6602 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
6603 data
->selected_frame
= selected_frame
;
6604 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
6605 XSETBUFFER (data
->current_buffer
, current_buffer
);
6606 data
->minibuf_scroll_window
= minibuf_level
> 0 ? Vminibuf_scroll_window
: Qnil
;
6607 data
->minibuf_selected_window
= minibuf_level
> 0 ? minibuf_selected_window
: Qnil
;
6608 data
->root_window
= FRAME_ROOT_WINDOW (f
);
6609 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
6610 XSETINT (data
->min_height
, window_min_height
);
6611 XSETINT (data
->min_width
, window_min_width
);
6612 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
6613 data
->saved_windows
= tem
;
6614 for (i
= 0; i
< n_windows
; i
++)
6615 XVECTOR (tem
)->contents
[i
]
6616 = Fmake_vector (make_number (VECSIZE (struct saved_window
)), Qnil
);
6617 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
6618 XSETWINDOW_CONFIGURATION (tem
, data
);
6622 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
6624 doc
: /* Execute BODY, preserving window sizes and contents.
6625 Return the value of the last form in BODY.
6626 Restore which buffer appears in which window, where display starts,
6627 and the value of point and mark for each window.
6628 Also restore the choice of selected window.
6629 Also restore which buffer is current.
6630 Does not restore the value of point in current buffer.
6631 usage: (save-window-excursion BODY ...) */)
6635 register Lisp_Object val
;
6636 register int count
= SPECPDL_INDEX ();
6638 record_unwind_protect (Fset_window_configuration
,
6639 Fcurrent_window_configuration (Qnil
));
6640 val
= Fprogn (args
);
6641 return unbind_to (count
, val
);
6646 /***********************************************************************
6648 ***********************************************************************/
6654 Lisp_Object tail
= Qnil
;
6655 Lisp_Object result
= Qnil
;
6662 if (!NILP (w
->hchild
))
6663 wn
= Fcons (Qnil
, Fcons (Fwindow_edges (wn
),
6664 window_tree (XWINDOW (w
->hchild
))));
6665 else if (!NILP (w
->vchild
))
6666 wn
= Fcons (Qt
, Fcons (Fwindow_edges (wn
),
6667 window_tree (XWINDOW (w
->vchild
))));
6671 result
= tail
= Fcons (wn
, Qnil
);
6675 XSETCDR (tail
, Fcons (wn
, Qnil
));
6679 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6687 DEFUN ("window-tree", Fwindow_tree
, Swindow_tree
,
6689 doc
: /* Return the window tree for frame FRAME.
6691 The return value is a list of the form (ROOT MINI), where ROOT
6692 represents the window tree of the frame's root window, and MINI
6693 is the frame's minibuffer window.
6695 If the root window is not split, ROOT is the root window itself.
6696 Otherwise, ROOT is a list (DIR EDGES W1 W2 ...) where DIR is nil for a
6697 horizontal split, and t for a vertical split, EDGES gives the combined
6698 size and position of the subwindows in the split, and the rest of the
6699 elements are the subwindows in the split. Each of the subwindows may
6700 again be a window or a list representing a window split, and so on.
6701 EDGES is a list \(LEFT TOP RIGHT BOTTOM) as returned by `window-edges'.
6703 If FRAME is nil or omitted, return information on the currently
6711 frame
= selected_frame
;
6713 CHECK_FRAME (frame
);
6716 if (!FRAME_LIVE_P (f
))
6719 return window_tree (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6723 /***********************************************************************
6725 ***********************************************************************/
6727 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
6729 doc
: /* Set width of marginal areas of window WINDOW.
6730 If WINDOW is nil, set margins of the currently selected window.
6731 Second arg LEFT-WIDTH specifies the number of character cells to
6732 reserve for the left marginal area. Optional third arg RIGHT-WIDTH
6733 does the same for the right marginal area. A nil width parameter
6734 means no margin. */)
6735 (window
, left_width
, right_width
)
6736 Lisp_Object window
, left_width
, right_width
;
6738 struct window
*w
= decode_window (window
);
6740 /* Translate negative or zero widths to nil.
6741 Margins that are too wide have to be checked elsewhere. */
6743 if (!NILP (left_width
))
6745 CHECK_NUMBER (left_width
);
6746 if (XINT (left_width
) <= 0)
6750 if (!NILP (right_width
))
6752 CHECK_NUMBER (right_width
);
6753 if (XINT (right_width
) <= 0)
6757 if (!EQ (w
->left_margin_cols
, left_width
)
6758 || !EQ (w
->right_margin_cols
, right_width
))
6760 w
->left_margin_cols
= left_width
;
6761 w
->right_margin_cols
= right_width
;
6763 adjust_window_margins (w
);
6765 ++windows_or_buffers_changed
;
6766 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6773 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
6775 doc
: /* Get width of marginal areas of window WINDOW.
6776 If WINDOW is omitted or nil, use the currently selected window.
6777 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).
6778 If a marginal area does not exist, its width will be returned
6783 struct window
*w
= decode_window (window
);
6784 return Fcons (w
->left_margin_cols
, w
->right_margin_cols
);
6789 /***********************************************************************
6791 ***********************************************************************/
6793 DEFUN ("set-window-fringes", Fset_window_fringes
, Sset_window_fringes
,
6795 doc
: /* Set the fringe widths of window WINDOW.
6796 If WINDOW is nil, set the fringe widths of the currently selected
6798 Second arg LEFT-WIDTH specifies the number of pixels to reserve for
6799 the left fringe. Optional third arg RIGHT-WIDTH specifies the right
6800 fringe width. If a fringe width arg is nil, that means to use the
6801 frame's default fringe width. Default fringe widths can be set with
6802 the command `set-fringe-style'.
6803 If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes
6804 outside of the display margins. By default, fringes are drawn between
6805 display marginal areas and the text area. */)
6806 (window
, left_width
, right_width
, outside_margins
)
6807 Lisp_Object window
, left_width
, right_width
, outside_margins
;
6809 struct window
*w
= decode_window (window
);
6811 if (!NILP (left_width
))
6812 CHECK_NATNUM (left_width
);
6813 if (!NILP (right_width
))
6814 CHECK_NATNUM (right_width
);
6816 /* Do nothing on a tty. */
6817 if (FRAME_WINDOW_P (WINDOW_XFRAME (w
))
6818 && (!EQ (w
->left_fringe_width
, left_width
)
6819 || !EQ (w
->right_fringe_width
, right_width
)
6820 || !EQ (w
->fringes_outside_margins
, outside_margins
)))
6822 w
->left_fringe_width
= left_width
;
6823 w
->right_fringe_width
= right_width
;
6824 w
->fringes_outside_margins
= outside_margins
;
6826 adjust_window_margins (w
);
6828 clear_glyph_matrix (w
->current_matrix
);
6829 w
->window_end_valid
= Qnil
;
6831 ++windows_or_buffers_changed
;
6832 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6839 DEFUN ("window-fringes", Fwindow_fringes
, Swindow_fringes
,
6841 doc
: /* Get width of fringes of window WINDOW.
6842 If WINDOW is omitted or nil, use the currently selected window.
6843 Value is a list of the form (LEFT-WIDTH RIGHT-WIDTH OUTSIDE-MARGINS). */)
6847 struct window
*w
= decode_window (window
);
6849 return Fcons (make_number (WINDOW_LEFT_FRINGE_WIDTH (w
)),
6850 Fcons (make_number (WINDOW_RIGHT_FRINGE_WIDTH (w
)),
6851 Fcons ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6852 ? Qt
: Qnil
), Qnil
)));
6857 /***********************************************************************
6859 ***********************************************************************/
6861 DEFUN ("set-window-scroll-bars", Fset_window_scroll_bars
, Sset_window_scroll_bars
,
6863 doc
: /* Set width and type of scroll bars of window WINDOW.
6864 If window is nil, set scroll bars of the currently selected window.
6865 Second parameter WIDTH specifies the pixel width for the scroll bar;
6866 this is automatically adjusted to a multiple of the frame column width.
6867 Third parameter VERTICAL-TYPE specifies the type of the vertical scroll
6868 bar: left, right, or nil.
6869 If WIDTH is nil, use the frame's scroll-bar width.
6870 If VERTICAL-TYPE is t, use the frame's scroll-bar type.
6871 Fourth parameter HORIZONTAL-TYPE is currently unused. */)
6872 (window
, width
, vertical_type
, horizontal_type
)
6873 Lisp_Object window
, width
, vertical_type
, horizontal_type
;
6875 struct window
*w
= decode_window (window
);
6879 CHECK_NATNUM (width
);
6881 if (XINT (width
) == 0)
6882 vertical_type
= Qnil
;
6885 if (!(EQ (vertical_type
, Qnil
)
6886 || EQ (vertical_type
, Qleft
)
6887 || EQ (vertical_type
, Qright
)
6888 || EQ (vertical_type
, Qt
)))
6889 error ("Invalid type of vertical scroll bar");
6891 if (!EQ (w
->scroll_bar_width
, width
)
6892 || !EQ (w
->vertical_scroll_bar_type
, vertical_type
))
6894 w
->scroll_bar_width
= width
;
6895 w
->vertical_scroll_bar_type
= vertical_type
;
6897 adjust_window_margins (w
);
6899 clear_glyph_matrix (w
->current_matrix
);
6900 w
->window_end_valid
= Qnil
;
6902 ++windows_or_buffers_changed
;
6903 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6910 DEFUN ("window-scroll-bars", Fwindow_scroll_bars
, Swindow_scroll_bars
,
6912 doc
: /* Get width and type of scroll bars of window WINDOW.
6913 If WINDOW is omitted or nil, use the currently selected window.
6914 Value is a list of the form (WIDTH COLS VERTICAL-TYPE HORIZONTAL-TYPE).
6915 If WIDTH is nil or TYPE is t, the window is using the frame's corresponding
6920 struct window
*w
= decode_window (window
);
6921 return Fcons (make_number ((WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6922 ? WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6923 : WINDOW_SCROLL_BAR_AREA_WIDTH (w
))),
6924 Fcons (make_number (WINDOW_SCROLL_BAR_COLS (w
)),
6925 Fcons (w
->vertical_scroll_bar_type
,
6926 Fcons (Qnil
, Qnil
))));
6931 /***********************************************************************
6933 ***********************************************************************/
6935 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 2, 0,
6936 doc
: /* Return the amount by which WINDOW is scrolled vertically.
6937 Use the selected window if WINDOW is nil or omitted.
6938 Normally, value is a multiple of the canonical character height of WINDOW;
6939 optional second arg PIXELS-P means value is measured in pixels. */)
6941 Lisp_Object window
, pixels_p
;
6948 window
= selected_window
;
6950 CHECK_WINDOW (window
);
6951 w
= XWINDOW (window
);
6952 f
= XFRAME (w
->frame
);
6954 if (FRAME_WINDOW_P (f
))
6955 result
= (NILP (pixels_p
)
6956 ? FRAME_CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
)
6957 : make_number (-w
->vscroll
));
6959 result
= make_number (0);
6964 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
6966 doc
: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL.
6967 WINDOW nil means use the selected window. Normally, VSCROLL is a
6968 non-negative multiple of the canonical character height of WINDOW;
6969 optional third arg PIXELS-P non-nil means that VSCROLL is in pixels.
6970 If PIXELS-P is nil, VSCROLL may have to be rounded so that it
6971 corresponds to an integral number of pixels. The return value is the
6972 result of this rounding.
6973 If PIXELS-P is non-nil, the return value is VSCROLL. */)
6974 (window
, vscroll
, pixels_p
)
6975 Lisp_Object window
, vscroll
, pixels_p
;
6981 window
= selected_window
;
6983 CHECK_WINDOW (window
);
6984 CHECK_NUMBER_OR_FLOAT (vscroll
);
6986 w
= XWINDOW (window
);
6987 f
= XFRAME (w
->frame
);
6989 if (FRAME_WINDOW_P (f
))
6991 int old_dy
= w
->vscroll
;
6993 w
->vscroll
= - (NILP (pixels_p
)
6994 ? FRAME_LINE_HEIGHT (f
) * XFLOATINT (vscroll
)
6995 : XFLOATINT (vscroll
));
6996 w
->vscroll
= min (w
->vscroll
, 0);
6998 if (w
->vscroll
!= old_dy
)
7000 /* Adjust glyph matrix of the frame if the virtual display
7001 area becomes larger than before. */
7002 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
7005 /* Prevent redisplay shortcuts. */
7006 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
7010 return Fwindow_vscroll (window
, pixels_p
);
7014 /* Call FN for all leaf windows on frame F. FN is called with the
7015 first argument being a pointer to the leaf window, and with
7016 additional argument USER_DATA. Stops when FN returns 0. */
7019 foreach_window (f
, fn
, user_data
)
7021 int (* fn
) P_ ((struct window
*, void *));
7024 /* Fdelete_frame may set FRAME_ROOT_WINDOW (f) to Qnil. */
7025 if (WINDOWP (FRAME_ROOT_WINDOW (f
)))
7026 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
7030 /* Helper function for foreach_window. Call FN for all leaf windows
7031 reachable from W. FN is called with the first argument being a
7032 pointer to the leaf window, and with additional argument USER_DATA.
7033 Stop when FN returns 0. Value is 0 if stopped by FN. */
7036 foreach_window_1 (w
, fn
, user_data
)
7038 int (* fn
) P_ ((struct window
*, void *));
7043 for (cont
= 1; w
&& cont
;)
7045 if (!NILP (w
->hchild
))
7046 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
7047 else if (!NILP (w
->vchild
))
7048 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
7050 cont
= fn (w
, user_data
);
7052 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
7059 /* Freeze or unfreeze the window start of W unless it is a
7060 mini-window or the selected window. FREEZE_P non-null means freeze
7061 the window start. */
7064 freeze_window_start (w
, freeze_p
)
7068 if (w
== XWINDOW (selected_window
)
7069 || MINI_WINDOW_P (w
)
7070 || (MINI_WINDOW_P (XWINDOW (selected_window
))
7071 && ! NILP (Vminibuf_scroll_window
)
7072 && w
== XWINDOW (Vminibuf_scroll_window
)))
7075 w
->frozen_window_start_p
= freeze_p
!= NULL
;
7080 /* Freeze or unfreeze the window starts of all leaf windows on frame
7081 F, except the selected window and a mini-window. FREEZE_P non-zero
7082 means freeze the window start. */
7085 freeze_window_starts (f
, freeze_p
)
7089 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
7093 /***********************************************************************
7095 ***********************************************************************/
7097 /* Return 1 if window configurations C1 and C2
7098 describe the same state of affairs. This is used by Fequal. */
7101 compare_window_configurations (c1
, c2
, ignore_positions
)
7103 int ignore_positions
;
7105 register struct save_window_data
*d1
, *d2
;
7106 struct Lisp_Vector
*sw1
, *sw2
;
7109 CHECK_WINDOW_CONFIGURATION (c1
);
7110 CHECK_WINDOW_CONFIGURATION (c2
);
7112 d1
= (struct save_window_data
*) XVECTOR (c1
);
7113 d2
= (struct save_window_data
*) XVECTOR (c2
);
7114 sw1
= XVECTOR (d1
->saved_windows
);
7115 sw2
= XVECTOR (d2
->saved_windows
);
7117 if (! EQ (d1
->frame_cols
, d2
->frame_cols
))
7119 if (! EQ (d1
->frame_lines
, d2
->frame_lines
))
7121 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
7123 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
7125 /* Don't compare the current_window field directly.
7126 Instead see w1_is_current and w2_is_current, below. */
7127 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
7129 if (! ignore_positions
)
7131 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
7133 if (! EQ (d1
->minibuf_selected_window
, d2
->minibuf_selected_window
))
7136 /* Don't compare the root_window field.
7137 We don't require the two configurations
7138 to use the same window object,
7139 and the two root windows must be equivalent
7140 if everything else compares equal. */
7141 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
7143 if (! EQ (d1
->min_width
, d2
->min_width
))
7145 if (! EQ (d1
->min_height
, d2
->min_height
))
7148 /* Verify that the two confis have the same number of windows. */
7149 if (sw1
->size
!= sw2
->size
)
7152 for (i
= 0; i
< sw1
->size
; i
++)
7154 struct saved_window
*p1
, *p2
;
7155 int w1_is_current
, w2_is_current
;
7157 p1
= SAVED_WINDOW_N (sw1
, i
);
7158 p2
= SAVED_WINDOW_N (sw2
, i
);
7160 /* Verify that the current windows in the two
7161 configurations correspond to each other. */
7162 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
7163 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
7165 if (w1_is_current
!= w2_is_current
)
7168 /* Verify that the corresponding windows do match. */
7169 if (! EQ (p1
->buffer
, p2
->buffer
))
7171 if (! EQ (p1
->left_col
, p2
->left_col
))
7173 if (! EQ (p1
->top_line
, p2
->top_line
))
7175 if (! EQ (p1
->total_cols
, p2
->total_cols
))
7177 if (! EQ (p1
->total_lines
, p2
->total_lines
))
7179 if (! EQ (p1
->display_table
, p2
->display_table
))
7181 if (! EQ (p1
->parent
, p2
->parent
))
7183 if (! EQ (p1
->prev
, p2
->prev
))
7185 if (! ignore_positions
)
7187 if (! EQ (p1
->hscroll
, p2
->hscroll
))
7189 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
7191 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
7193 if (NILP (Fequal (p1
->start
, p2
->start
)))
7195 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
7197 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
7200 if (! EQ (p1
->left_margin_cols
, p2
->left_margin_cols
))
7202 if (! EQ (p1
->right_margin_cols
, p2
->right_margin_cols
))
7204 if (! EQ (p1
->left_fringe_width
, p2
->left_fringe_width
))
7206 if (! EQ (p1
->right_fringe_width
, p2
->right_fringe_width
))
7208 if (! EQ (p1
->fringes_outside_margins
, p2
->fringes_outside_margins
))
7210 if (! EQ (p1
->scroll_bar_width
, p2
->scroll_bar_width
))
7212 if (! EQ (p1
->vertical_scroll_bar_type
, p2
->vertical_scroll_bar_type
))
7219 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
7220 Scompare_window_configurations
, 2, 2, 0,
7221 doc
: /* Compare two window configurations as regards the structure of windows.
7222 This function ignores details such as the values of point and mark
7223 and scrolling positions. */)
7227 if (compare_window_configurations (x
, y
, 1))
7235 struct frame
*f
= make_initial_frame ();
7236 XSETFRAME (selected_frame
, f
);
7237 Vterminal_frame
= selected_frame
;
7238 minibuf_window
= f
->minibuffer_window
;
7239 selected_window
= f
->selected_window
;
7240 last_nonminibuf_frame
= f
;
7242 window_initialized
= 1;
7248 Vwindow_list
= Qnil
;
7254 Qscroll_up
= intern ("scroll-up");
7255 staticpro (&Qscroll_up
);
7257 Qscroll_down
= intern ("scroll-down");
7258 staticpro (&Qscroll_down
);
7260 Qwindow_size_fixed
= intern ("window-size-fixed");
7261 staticpro (&Qwindow_size_fixed
);
7262 Fset (Qwindow_size_fixed
, Qnil
);
7264 staticpro (&Qwindow_configuration_change_hook
);
7265 Qwindow_configuration_change_hook
7266 = intern ("window-configuration-change-hook");
7268 Qwindowp
= intern ("windowp");
7269 staticpro (&Qwindowp
);
7271 Qwindow_configuration_p
= intern ("window-configuration-p");
7272 staticpro (&Qwindow_configuration_p
);
7274 Qwindow_live_p
= intern ("window-live-p");
7275 staticpro (&Qwindow_live_p
);
7277 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
7278 staticpro (&Qtemp_buffer_show_hook
);
7280 staticpro (&Vwindow_list
);
7282 minibuf_selected_window
= Qnil
;
7283 staticpro (&minibuf_selected_window
);
7285 window_scroll_pixel_based_preserve_y
= -1;
7287 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
7288 doc
: /* Non-nil means call as function to display a help buffer.
7289 The function is called with one argument, the buffer to be displayed.
7290 Used by `with-output-to-temp-buffer'.
7291 If this function is used, then it must do the entire job of showing
7292 the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */);
7293 Vtemp_buffer_show_function
= Qnil
;
7295 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
7296 doc
: /* If non-nil, function to call to handle `display-buffer'.
7297 It will receive two args, the buffer and a flag which if non-nil means
7298 that the currently selected window is not acceptable.
7299 It should choose or create a window, display the specified buffer in it,
7300 and return the window.
7301 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'
7302 work using this function. */);
7303 Vdisplay_buffer_function
= Qnil
;
7305 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
7306 doc
: /* *If non-nil, `display-buffer' should even the window heights.
7307 If nil, `display-buffer' will leave the window configuration alone. */);
7308 Veven_window_heights
= Qt
;
7310 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
7311 doc
: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */);
7312 Vminibuf_scroll_window
= Qnil
;
7314 DEFVAR_BOOL ("mode-line-in-non-selected-windows", &mode_line_in_non_selected_windows
,
7315 doc
: /* Non-nil means to use `mode-line-inactive' face in non-selected windows.
7316 If the minibuffer is active, the `minibuffer-scroll-window' mode line
7317 is displayed in the `mode-line' face. */);
7318 mode_line_in_non_selected_windows
= 1;
7320 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
7321 doc
: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */);
7322 Vother_window_scroll_buffer
= Qnil
;
7324 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
7325 doc
: /* *Non-nil means `display-buffer' should make a separate frame. */);
7328 DEFVAR_BOOL ("auto-window-vscroll", &auto_window_vscroll_p
,
7329 doc
: /* *Non-nil means to automatically adjust `window-vscroll' to view tall lines. */);
7330 auto_window_vscroll_p
= 1;
7332 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
7333 doc
: /* *Non-nil means `display-buffer' should reuse frames.
7334 If the buffer in question is already displayed in a frame, raise that frame. */);
7335 display_buffer_reuse_frames
= 0;
7337 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
7338 doc
: /* Function to call to handle automatic new frame creation.
7339 It is called with no arguments and should return a newly created frame.
7341 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'
7342 where `pop-up-frame-alist' would hold the default frame parameters. */);
7343 Vpop_up_frame_function
= Qnil
;
7345 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
7346 doc
: /* *List of buffer names that should have their own special frames.
7347 Displaying a buffer with `display-buffer' or `pop-to-buffer',
7348 if its name is in this list, makes a special frame for it
7349 using `special-display-function'. See also `special-display-regexps'.
7351 An element of the list can be a list instead of just a string.
7352 There are two ways to use a list as an element:
7353 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)
7354 In the first case, the FRAME-PARAMETERS are pairs of the form
7355 \(PARAMETER . VALUE); these parameter values are used to create the frame.
7356 In the second case, FUNCTION is called with BUFFER as the first argument,
7357 followed by the OTHER-ARGS--it can display BUFFER in any way it likes.
7358 All this is done by the function found in `special-display-function'.
7360 If the specified frame parameters include (same-buffer . t), the
7361 buffer is displayed in the currently selected window. Otherwise, if
7362 they include (same-frame . t), the buffer is displayed in a new window
7363 in the currently selected frame.
7365 If this variable appears \"not to work\", because you add a name to it
7366 but that buffer still appears in the selected window, look at the
7367 values of `same-window-buffer-names' and `same-window-regexps'.
7368 Those variables take precedence over this one. */);
7369 Vspecial_display_buffer_names
= Qnil
;
7371 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
7372 doc
: /* *List of regexps saying which buffers should have their own special frames.
7373 When displaying a buffer with `display-buffer' or `pop-to-buffer',
7374 if any regexp in this list matches the buffer name, it makes a
7375 special frame for the buffer by calling `special-display-function'.
7377 An element of the list can be a list instead of just a string.
7378 There are two ways to use a list as an element:
7379 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)
7380 In the first case, the FRAME-PARAMETERS are pairs of the form
7381 \(PARAMETER . VALUE); these parameter values are used to create the frame.
7382 In the second case, FUNCTION is called with BUFFER as the first argument,
7383 followed by the OTHER-ARGS--it can display the buffer in any way it likes.
7384 All this is done by the function found in `special-display-function'.
7386 If the specified frame parameters include (same-buffer . t), the
7387 buffer is displayed in the currently selected window. Otherwise, if
7388 they include (same-frame . t), the buffer is displayed in a new window
7389 in the currently selected frame.
7391 If this variable appears \"not to work\", because you add a regexp to it
7392 but the matching buffers still appear in the selected window, look at the
7393 values of `same-window-buffer-names' and `same-window-regexps'.
7394 Those variables take precedence over this one. */);
7395 Vspecial_display_regexps
= Qnil
;
7397 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
7398 doc
: /* Function to call to make a new frame for a special buffer.
7399 It is called with two arguments, the buffer and optional buffer specific
7400 data, and should return a window displaying that buffer.
7401 The default value normally makes a separate frame for the buffer,
7402 using `special-display-frame-alist' to specify the frame parameters.
7403 But if the buffer specific data includes (same-buffer . t) then the
7404 buffer is displayed in the current selected window.
7405 Otherwise if it includes (same-frame . t) then the buffer is displayed in
7406 a new window in the currently selected frame.
7408 A buffer is special if it is listed in `special-display-buffer-names'
7409 or matches a regexp in `special-display-regexps'. */);
7410 Vspecial_display_function
= Qnil
;
7412 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
7413 doc
: /* *List of buffer names that should appear in the selected window.
7414 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'
7415 switches to it in the selected window, rather than making it appear
7416 in some other window.
7418 An element of the list can be a cons cell instead of just a string.
7419 Then the car must be a string, which specifies the buffer name.
7420 This is for compatibility with `special-display-buffer-names';
7421 the cdr of the cons cell is ignored.
7423 See also `same-window-regexps'. */);
7424 Vsame_window_buffer_names
= Qnil
;
7426 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
7427 doc
: /* *List of regexps saying which buffers should appear in the selected window.
7428 If a buffer name matches one of these regexps, then displaying it
7429 using `display-buffer' or `pop-to-buffer' switches to it
7430 in the selected window, rather than making it appear in some other window.
7432 An element of the list can be a cons cell instead of just a string.
7433 Then the car must be a string, which specifies the buffer name.
7434 This is for compatibility with `special-display-buffer-names';
7435 the cdr of the cons cell is ignored.
7437 See also `same-window-buffer-names'. */);
7438 Vsame_window_regexps
= Qnil
;
7440 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
7441 doc
: /* *Non-nil means display-buffer should make new windows. */);
7444 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
7445 doc
: /* *Number of lines of continuity when scrolling by screenfuls. */);
7446 next_screen_context_lines
= 2;
7448 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
7449 doc
: /* *A window must be at least this tall to be eligible for splitting
7450 by `display-buffer'. The value is in line units.
7451 If there is only one window, it is split regardless of this value. */);
7452 split_height_threshold
= 500;
7454 DEFVAR_INT ("window-min-height", &window_min_height
,
7455 doc
: /* *Delete any window less than this tall (including its mode line).
7456 The value is in line units. */);
7457 window_min_height
= 4;
7459 DEFVAR_INT ("window-min-width", &window_min_width
,
7460 doc
: /* *Delete any window less than this wide (measured in characters). */);
7461 window_min_width
= 10;
7463 DEFVAR_LISP ("scroll-preserve-screen-position",
7464 &Vscroll_preserve_screen_position
,
7465 doc
: /* *Controls if scroll commands move point to keep its screen line unchanged.
7466 A value of nil means point does not keep its screen position except
7467 at the scroll margin or window boundary respectively.
7468 A value of t means point keeps its screen position if the scroll
7469 command moved it vertically out of the window, e.g. when scrolling
7471 Any other value means point always keeps its screen position. */);
7472 Vscroll_preserve_screen_position
= Qnil
;
7474 DEFVAR_LISP ("window-configuration-change-hook",
7475 &Vwindow_configuration_change_hook
,
7476 doc
: /* Functions to call when window configuration changes.
7477 The selected frame is the one whose configuration has changed. */);
7478 Vwindow_configuration_change_hook
= Qnil
;
7480 defsubr (&Sselected_window
);
7481 defsubr (&Sminibuffer_window
);
7482 defsubr (&Swindow_minibuffer_p
);
7483 defsubr (&Swindowp
);
7484 defsubr (&Swindow_live_p
);
7485 defsubr (&Spos_visible_in_window_p
);
7486 defsubr (&Swindow_line_height
);
7487 defsubr (&Swindow_buffer
);
7488 defsubr (&Swindow_height
);
7489 defsubr (&Swindow_width
);
7490 defsubr (&Swindow_hscroll
);
7491 defsubr (&Sset_window_hscroll
);
7492 defsubr (&Swindow_redisplay_end_trigger
);
7493 defsubr (&Sset_window_redisplay_end_trigger
);
7494 defsubr (&Swindow_edges
);
7495 defsubr (&Swindow_pixel_edges
);
7496 defsubr (&Swindow_inside_edges
);
7497 defsubr (&Swindow_inside_pixel_edges
);
7498 defsubr (&Scoordinates_in_window_p
);
7499 defsubr (&Swindow_at
);
7500 defsubr (&Swindow_point
);
7501 defsubr (&Swindow_start
);
7502 defsubr (&Swindow_end
);
7503 defsubr (&Sset_window_point
);
7504 defsubr (&Sset_window_start
);
7505 defsubr (&Swindow_dedicated_p
);
7506 defsubr (&Sset_window_dedicated_p
);
7507 defsubr (&Swindow_display_table
);
7508 defsubr (&Sset_window_display_table
);
7509 defsubr (&Snext_window
);
7510 defsubr (&Sprevious_window
);
7511 defsubr (&Sother_window
);
7512 defsubr (&Sget_lru_window
);
7513 defsubr (&Sget_largest_window
);
7514 defsubr (&Sget_buffer_window
);
7515 defsubr (&Sdelete_other_windows
);
7516 defsubr (&Sdelete_windows_on
);
7517 defsubr (&Sreplace_buffer_in_windows
);
7518 defsubr (&Sdelete_window
);
7519 defsubr (&Sset_window_buffer
);
7520 defsubr (&Sselect_window
);
7521 defsubr (&Sspecial_display_p
);
7522 defsubr (&Ssame_window_p
);
7523 defsubr (&Sdisplay_buffer
);
7524 defsubr (&Sforce_window_update
);
7525 defsubr (&Ssplit_window
);
7526 defsubr (&Senlarge_window
);
7527 defsubr (&Sshrink_window
);
7528 defsubr (&Sadjust_window_trailing_edge
);
7529 defsubr (&Sscroll_up
);
7530 defsubr (&Sscroll_down
);
7531 defsubr (&Sscroll_left
);
7532 defsubr (&Sscroll_right
);
7533 defsubr (&Sother_window_for_scrolling
);
7534 defsubr (&Sscroll_other_window
);
7535 defsubr (&Sminibuffer_selected_window
);
7536 defsubr (&Srecenter
);
7537 defsubr (&Swindow_text_height
);
7538 defsubr (&Smove_to_window_line
);
7539 defsubr (&Swindow_configuration_p
);
7540 defsubr (&Swindow_configuration_frame
);
7541 defsubr (&Sset_window_configuration
);
7542 defsubr (&Scurrent_window_configuration
);
7543 defsubr (&Ssave_window_excursion
);
7544 defsubr (&Swindow_tree
);
7545 defsubr (&Sset_window_margins
);
7546 defsubr (&Swindow_margins
);
7547 defsubr (&Sset_window_fringes
);
7548 defsubr (&Swindow_fringes
);
7549 defsubr (&Sset_window_scroll_bars
);
7550 defsubr (&Swindow_scroll_bars
);
7551 defsubr (&Swindow_vscroll
);
7552 defsubr (&Sset_window_vscroll
);
7553 defsubr (&Scompare_window_configurations
);
7554 defsubr (&Swindow_list
);
7560 initial_define_key (control_x_map
, '1', "delete-other-windows");
7561 initial_define_key (control_x_map
, '2', "split-window");
7562 initial_define_key (control_x_map
, '0', "delete-window");
7563 initial_define_key (control_x_map
, 'o', "other-window");
7564 initial_define_key (control_x_map
, '^', "enlarge-window");
7565 initial_define_key (control_x_map
, '<', "scroll-left");
7566 initial_define_key (control_x_map
, '>', "scroll-right");
7568 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
7569 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
7570 initial_define_key (meta_map
, 'v', "scroll-down");
7572 initial_define_key (global_map
, Ctl('L'), "recenter");
7573 initial_define_key (meta_map
, 'r', "move-to-window-line");
7576 /* arch-tag: 90a9c576-0590-48f1-a5f1-6c96a0452d9f
7577 (do not change this comment) */