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, 2007 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
34 #include "dispextern.h"
35 #include "blockinput.h"
36 #include "intervals.h"
40 #endif /* HAVE_X_WINDOWS */
52 Lisp_Object Qwindowp
, Qwindow_live_p
, Qwindow_configuration_p
;
53 Lisp_Object Qscroll_up
, Qscroll_down
;
54 Lisp_Object Qwindow_size_fixed
;
55 extern Lisp_Object Qleft_margin
, Qright_margin
;
57 static int displayed_window_lines
P_ ((struct window
*));
58 static struct window
*decode_window
P_ ((Lisp_Object
));
59 static int count_windows
P_ ((struct window
*));
60 static int get_leaf_windows
P_ ((struct window
*, struct window
**, int));
61 static void window_scroll
P_ ((Lisp_Object
, int, int, int));
62 static void window_scroll_pixel_based
P_ ((Lisp_Object
, int, int, int));
63 static void window_scroll_line_based
P_ ((Lisp_Object
, int, int, int));
64 static int window_min_size_1
P_ ((struct window
*, int));
65 static int window_min_size
P_ ((struct window
*, int, int, int *));
66 static void size_window
P_ ((Lisp_Object
, int, int, int, int, int));
67 static int freeze_window_start
P_ ((struct window
*, void *));
68 static int window_fixed_size_p
P_ ((struct window
*, int, int));
69 static void enlarge_window
P_ ((Lisp_Object
, int, int));
70 static Lisp_Object window_list
P_ ((void));
71 static int add_window_to_list
P_ ((struct window
*, void *));
72 static int candidate_window_p
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
,
74 static Lisp_Object next_window
P_ ((Lisp_Object
, Lisp_Object
,
76 static void decode_next_window_args
P_ ((Lisp_Object
*, Lisp_Object
*,
78 static int foreach_window_1
P_ ((struct window
*,
79 int (* fn
) (struct window
*, void *),
81 static Lisp_Object window_list_1
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
));
83 /* This is the window in which the terminal's cursor should
84 be left when nothing is being done with it. This must
85 always be a leaf window, and its buffer is selected by
86 the top level editing loop at the end of each command.
88 This value is always the same as
89 FRAME_SELECTED_WINDOW (selected_frame). */
91 Lisp_Object selected_window
;
93 /* A list of all windows for use by next_window and Fwindow_list.
94 Functions creating or deleting windows should invalidate this cache
95 by setting it to nil. */
97 Lisp_Object Vwindow_list
;
99 /* The mini-buffer window of the selected frame.
100 Note that you cannot test for mini-bufferness of an arbitrary window
101 by comparing against this; but you can test for mini-bufferness of
102 the selected window. */
104 Lisp_Object minibuf_window
;
106 /* Non-nil means it is the window whose mode line should be
107 shown as the selected window when the minibuffer is selected. */
109 Lisp_Object minibuf_selected_window
;
111 /* Non-nil means it is the window for C-M-v to scroll
112 when the mini-buffer is selected. */
114 Lisp_Object Vminibuf_scroll_window
;
116 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
118 Lisp_Object Vother_window_scroll_buffer
;
120 /* Non-nil means it's function to call to display temp buffers. */
122 Lisp_Object Vtemp_buffer_show_function
;
124 /* Non-zero means line and page scrolling on tall lines (with images)
125 does partial scrolling by modifying window-vscroll. */
127 int auto_window_vscroll_p
;
129 /* Non-zero means to use mode-line-inactive face in all windows but the
130 selected-window and the minibuffer-scroll-window when the
131 minibuffer is active. */
132 int mode_line_in_non_selected_windows
;
134 /* If a window gets smaller than either of these, it is removed. */
136 EMACS_INT window_min_height
;
137 EMACS_INT window_min_width
;
139 /* Nonzero implies Fdisplay_buffer should create windows. */
143 /* Nonzero implies make new frames for Fdisplay_buffer. */
147 /* Nonzero means reuse existing frames for displaying buffers. */
149 int display_buffer_reuse_frames
;
151 /* Non-nil means use this function instead of default */
153 Lisp_Object Vpop_up_frame_function
;
155 /* Function to call to handle Fdisplay_buffer. */
157 Lisp_Object Vdisplay_buffer_function
;
159 /* Non-nil means that Fdisplay_buffer should even the heights of windows. */
161 Lisp_Object Veven_window_heights
;
163 /* List of buffer *names* for buffers that should have their own frames. */
165 Lisp_Object Vspecial_display_buffer_names
;
167 /* List of regexps for buffer names that should have their own frames. */
169 Lisp_Object Vspecial_display_regexps
;
171 /* Function to pop up a special frame. */
173 Lisp_Object Vspecial_display_function
;
175 /* List of buffer *names* for buffers to appear in selected window. */
177 Lisp_Object Vsame_window_buffer_names
;
179 /* List of regexps for buffer names to appear in selected window. */
181 Lisp_Object Vsame_window_regexps
;
183 /* Hook run at end of temp_output_buffer_show. */
185 Lisp_Object Qtemp_buffer_show_hook
;
187 /* Fdisplay_buffer always splits the largest window
188 if that window is more than this high. */
190 EMACS_INT split_height_threshold
;
192 /* Number of lines of continuity in scrolling by screenfuls. */
194 EMACS_INT next_screen_context_lines
;
196 /* Incremented for each window created. */
198 static int sequence_number
;
200 /* Nonzero after init_window_once has finished. */
202 static int window_initialized
;
204 /* Hook to run when window config changes. */
206 Lisp_Object Qwindow_configuration_change_hook
;
207 Lisp_Object Vwindow_configuration_change_hook
;
209 /* Non-nil means scroll commands try to put point
210 at the same screen height as previously. */
212 Lisp_Object Vscroll_preserve_screen_position
;
214 /* Incremented by 1 whenever a window is deleted. */
216 int window_deletion_count
;
218 /* Used by the function window_scroll_pixel_based */
220 static int window_scroll_pixel_based_preserve_y
;
222 #if 0 /* This isn't used anywhere. */
223 /* Nonzero means we can split a frame even if it is "unsplittable". */
224 static int inhibit_frame_unsplittable
;
227 extern EMACS_INT scroll_margin
;
229 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
231 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
232 doc
: /* Returns t if OBJECT is a window. */)
236 return WINDOWP (object
) ? Qt
: Qnil
;
239 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
240 doc
: /* Returns t if OBJECT is a window which is currently visible. */)
244 return WINDOW_LIVE_P (object
) ? Qt
: Qnil
;
251 register struct window
*p
;
253 p
= allocate_window ();
255 XSETFASTINT (p
->sequence_number
, sequence_number
);
256 XSETFASTINT (p
->left_col
, 0);
257 XSETFASTINT (p
->top_line
, 0);
258 XSETFASTINT (p
->total_lines
, 0);
259 XSETFASTINT (p
->total_cols
, 0);
260 XSETFASTINT (p
->hscroll
, 0);
261 XSETFASTINT (p
->min_hscroll
, 0);
262 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
263 p
->start
= Fmake_marker ();
264 p
->pointm
= Fmake_marker ();
265 XSETFASTINT (p
->use_time
, 0);
267 p
->display_table
= Qnil
;
269 p
->pseudo_window_p
= 0;
270 bzero (&p
->cursor
, sizeof (p
->cursor
));
271 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
272 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
273 p
->desired_matrix
= p
->current_matrix
= 0;
274 p
->nrows_scale_factor
= p
->ncols_scale_factor
= 1;
275 p
->phys_cursor_type
= -1;
276 p
->phys_cursor_width
= -1;
277 p
->must_be_updated_p
= 0;
278 XSETFASTINT (p
->window_end_vpos
, 0);
279 XSETFASTINT (p
->window_end_pos
, 0);
280 p
->window_end_valid
= Qnil
;
283 XSETFASTINT (p
->last_point
, 0);
284 p
->frozen_window_start_p
= 0;
285 p
->last_cursor_off_p
= p
->cursor_off_p
= 0;
286 p
->left_margin_cols
= Qnil
;
287 p
->right_margin_cols
= Qnil
;
288 p
->left_fringe_width
= Qnil
;
289 p
->right_fringe_width
= Qnil
;
290 p
->fringes_outside_margins
= Qnil
;
291 p
->scroll_bar_width
= Qnil
;
292 p
->vertical_scroll_bar_type
= Qt
;
298 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
299 doc
: /* Return the window that the cursor now appears in and commands apply to. */)
302 return selected_window
;
305 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
306 doc
: /* Return the window used now for minibuffers.
307 If the optional argument FRAME is specified, return the minibuffer window
308 used by that frame. */)
313 frame
= selected_frame
;
314 CHECK_LIVE_FRAME (frame
);
315 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
318 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
319 doc
: /* Returns non-nil if WINDOW is a minibuffer window.
320 WINDOW defaults to the selected window. */)
324 struct window
*w
= decode_window (window
);
325 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
329 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
330 Spos_visible_in_window_p
, 0, 3, 0,
331 doc
: /* Return non-nil if position POS is currently on the frame in WINDOW.
332 Return nil if that position is scrolled vertically out of view.
333 If a character is only partially visible, nil is returned, unless the
334 optional argument PARTIALLY is non-nil.
335 If POS is only out of view because of horizontal scrolling, return non-nil.
336 If POS is t, it specifies the position of the last visible glyph in WINDOW.
337 POS defaults to point in WINDOW; WINDOW defaults to the selected window.
339 If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil,
340 return value is a list of 2 or 6 elements (X Y [RTOP RBOT ROWH VPOS]),
341 where X and Y are the pixel coordinates relative to the top left corner
342 of the window. The remaining elements are omitted if the character after
343 POS is fully visible; otherwise, RTOP and RBOT are the number of pixels
344 off-window at the top and bottom of the row, ROWH is the height of the
345 display row, and VPOS is the row number (0-based) containing POS. */)
346 (pos
, window
, partially
)
347 Lisp_Object pos
, window
, partially
;
349 register struct window
*w
;
351 register struct buffer
*buf
;
353 Lisp_Object in_window
= Qnil
;
354 int rtop
, rbot
, rowh
, vpos
, fully_p
= 1;
357 w
= decode_window (window
);
358 buf
= XBUFFER (w
->buffer
);
359 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
363 else if (!NILP (pos
))
365 CHECK_NUMBER_COERCE_MARKER (pos
);
368 else if (w
== XWINDOW (selected_window
))
371 posint
= XMARKER (w
->pointm
)->charpos
;
373 /* If position is above window start or outside buffer boundaries,
374 or if window start is out of range, position is not visible. */
376 || (posint
>= CHARPOS (top
) && posint
<= BUF_ZV (buf
)))
377 && CHARPOS (top
) >= BUF_BEGV (buf
)
378 && CHARPOS (top
) <= BUF_ZV (buf
)
379 && pos_visible_p (w
, posint
, &x
, &y
, &rtop
, &rbot
, &rowh
, &vpos
)
380 && (fully_p
= !rtop
&& !rbot
, (!NILP (partially
) || fully_p
)))
383 if (!NILP (in_window
) && !NILP (partially
))
385 Lisp_Object part
= Qnil
;
387 part
= list4 (make_number (rtop
), make_number (rbot
),
388 make_number (rowh
), make_number (vpos
));
389 in_window
= Fcons (make_number (x
),
390 Fcons (make_number (y
), part
));
396 DEFUN ("window-line-height", Fwindow_line_height
,
397 Swindow_line_height
, 0, 2, 0,
398 doc
: /* Return height in pixels of text line LINE in window WINDOW.
399 If WINDOW is nil or omitted, use selected window.
401 Return height of current line if LINE is omitted or nil. Return height of
402 header or mode line if LINE is `header-line' and `mode-line'.
403 Otherwise, LINE is a text line number starting from 0. A negative number
404 counts from the end of the window.
406 Value is a list (HEIGHT VPOS YPOS OFFBOT), where HEIGHT is the height
407 in pixels of the visible part of the line, VPOS and YPOS are the
408 vertical position in lines and pixels of the line, relative to the top
409 of the first text line, and OFFBOT is the number of off-window pixels at
410 the bottom of the text line. If there are off-window pixels at the top
411 of the (first) text line, YPOS is negative.
413 Return nil if window display is not up-to-date. In that case, use
414 `pos-visible-in-window-p' to obtain the information. */)
416 Lisp_Object line
, window
;
418 register struct window
*w
;
419 register struct buffer
*b
;
420 struct glyph_row
*row
, *end_row
;
421 int max_y
, crop
, i
, n
;
423 w
= decode_window (window
);
426 || w
->pseudo_window_p
)
429 CHECK_BUFFER (w
->buffer
);
430 b
= XBUFFER (w
->buffer
);
432 /* Fail if current matrix is not up-to-date. */
433 if (NILP (w
->window_end_valid
)
434 || current_buffer
->clip_changed
435 || current_buffer
->prevent_redisplay_optimizations_p
436 || XFASTINT (w
->last_modified
) < BUF_MODIFF (b
)
437 || XFASTINT (w
->last_overlay_modified
) < BUF_OVERLAY_MODIFF (b
))
443 if (i
< 0 || i
>= w
->current_matrix
->nrows
444 || (row
= MATRIX_ROW (w
->current_matrix
, i
), !row
->enabled_p
))
446 max_y
= window_text_bottom_y (w
);
450 if (EQ (line
, Qheader_line
))
452 if (!WINDOW_WANTS_HEADER_LINE_P (w
))
454 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
457 return list4 (make_number (row
->height
),
458 make_number (0), make_number (0),
462 if (EQ (line
, Qmode_line
))
464 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
467 return list4 (make_number (row
->height
),
468 make_number (0), /* not accurate */
469 make_number (WINDOW_HEADER_LINE_HEIGHT (w
)
470 + window_text_bottom_y (w
)),
477 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
478 end_row
= MATRIX_BOTTOM_TEXT_ROW (w
->current_matrix
, w
);
479 max_y
= window_text_bottom_y (w
);
482 while ((n
< 0 || i
< n
)
483 && row
<= end_row
&& row
->enabled_p
484 && row
->y
+ row
->height
< max_y
)
487 if (row
> end_row
|| !row
->enabled_p
)
499 crop
= max (0, (row
->y
+ row
->height
) - max_y
);
500 return list4 (make_number (row
->height
+ min (0, row
->y
) - crop
),
502 make_number (row
->y
),
508 static struct window
*
509 decode_window (window
)
510 register Lisp_Object window
;
513 return XWINDOW (selected_window
);
515 CHECK_LIVE_WINDOW (window
);
516 return XWINDOW (window
);
519 static struct window
*
520 decode_any_window (window
)
521 register Lisp_Object window
;
524 return XWINDOW (selected_window
);
526 CHECK_WINDOW (window
);
527 return XWINDOW (window
);
530 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
531 doc
: /* Return the buffer that WINDOW is displaying.
532 WINDOW defaults to the selected window. */)
536 return decode_window (window
)->buffer
;
539 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
540 doc
: /* Return the number of lines in WINDOW (including its mode line).
541 WINDOW defaults to the selected window. */)
545 return decode_any_window (window
)->total_lines
;
548 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
549 doc
: /* Return the number of display columns in WINDOW.
550 This is the width that is usable columns available for text in WINDOW.
551 If you want to find out how many columns WINDOW takes up,
552 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */)
556 return make_number (window_box_text_cols (decode_any_window (window
)));
559 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
560 doc
: /* Return the number of columns by which WINDOW is scrolled from left margin.
561 WINDOW defaults to the selected window. */)
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 WINDOW defaults to the selected window.
595 See `set-window-redisplay-end-trigger' for more information. */)
599 return decode_window (window
)->redisplay_end_trigger
;
602 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
603 Sset_window_redisplay_end_trigger
, 2, 2, 0,
604 doc
: /* Set WINDOW's redisplay end trigger value to VALUE.
605 VALUE should be a buffer position (typically a marker) or nil.
606 If it is a buffer position, then if redisplay in WINDOW reaches a position
607 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
608 with two arguments: WINDOW, and the end trigger value.
609 Afterwards the end-trigger value is reset to nil. */)
611 register Lisp_Object window
, value
;
613 register struct window
*w
;
615 w
= decode_window (window
);
616 w
->redisplay_end_trigger
= value
;
620 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
621 doc
: /* Return a list of the edge coordinates of WINDOW.
622 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
623 RIGHT is one more than the rightmost column occupied by WINDOW,
624 and BOTTOM is one more than the bottommost row occupied by WINDOW.
625 The edges include the space used by the window's scroll bar,
626 display margins, fringes, header line, and mode line, if it has them.
627 To get the edges of the actual text area, use `window-inside-edges'. */)
631 register struct window
*w
= decode_any_window (window
);
633 return Fcons (make_number (WINDOW_LEFT_EDGE_COL (w
)),
634 Fcons (make_number (WINDOW_TOP_EDGE_LINE (w
)),
635 Fcons (make_number (WINDOW_RIGHT_EDGE_COL (w
)),
636 Fcons (make_number (WINDOW_BOTTOM_EDGE_LINE (w
)),
640 DEFUN ("window-pixel-edges", Fwindow_pixel_edges
, Swindow_pixel_edges
, 0, 1, 0,
641 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
642 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
643 RIGHT is one more than the rightmost x position occupied by WINDOW,
644 and BOTTOM is one more than the bottommost y position occupied by WINDOW.
645 The pixel edges include the space used by the window's scroll bar,
646 display margins, fringes, header line, and mode line, if it has them.
647 To get the edges of the actual text area, use `window-inside-pixel-edges'. */)
651 register struct window
*w
= decode_any_window (window
);
653 return Fcons (make_number (WINDOW_LEFT_EDGE_X (w
)),
654 Fcons (make_number (WINDOW_TOP_EDGE_Y (w
)),
655 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w
)),
656 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w
)),
660 DEFUN ("window-inside-edges", Fwindow_inside_edges
, Swindow_inside_edges
, 0, 1, 0,
661 doc
: /* Return a list of the edge coordinates of WINDOW.
662 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
663 RIGHT is one more than the rightmost column used by text in WINDOW,
664 and BOTTOM is one more than the bottommost row used by text in WINDOW.
665 The inside edges do not include the space used by the window's scroll bar,
666 display margins, fringes, header line, and/or mode line. */)
670 register struct window
*w
= decode_any_window (window
);
672 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_COL (w
)
673 + WINDOW_LEFT_MARGIN_COLS (w
)
674 + WINDOW_LEFT_FRINGE_COLS (w
)),
675 make_number (WINDOW_TOP_EDGE_LINE (w
)
676 + WINDOW_HEADER_LINE_LINES (w
)),
677 make_number (WINDOW_BOX_RIGHT_EDGE_COL (w
)
678 - WINDOW_RIGHT_MARGIN_COLS (w
)
679 - WINDOW_RIGHT_FRINGE_COLS (w
)),
680 make_number (WINDOW_BOTTOM_EDGE_LINE (w
)
681 - WINDOW_MODE_LINE_LINES (w
)));
684 DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges
, Swindow_inside_pixel_edges
, 0, 1, 0,
685 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
686 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
687 RIGHT is one more than the rightmost x position used by text in WINDOW,
688 and BOTTOM is one more than the bottommost y position used by text in WINDOW.
689 The inside edges do not include the space used by the window's scroll bar,
690 display margins, fringes, header line, and/or mode line. */)
694 register struct window
*w
= decode_any_window (window
);
696 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w
)
697 + WINDOW_LEFT_MARGIN_WIDTH (w
)
698 + WINDOW_LEFT_FRINGE_WIDTH (w
)),
699 make_number (WINDOW_TOP_EDGE_Y (w
)
700 + WINDOW_HEADER_LINE_HEIGHT (w
)),
701 make_number (WINDOW_BOX_RIGHT_EDGE_X (w
)
702 - WINDOW_RIGHT_MARGIN_WIDTH (w
)
703 - WINDOW_RIGHT_FRINGE_WIDTH (w
)),
704 make_number (WINDOW_BOTTOM_EDGE_Y (w
)
705 - WINDOW_MODE_LINE_HEIGHT (w
)));
708 /* Test if the character at column *X, row *Y is within window W.
709 If it is not, return ON_NOTHING;
710 if it is in the window's text area,
711 set *x and *y to its location relative to the upper left corner
714 if it is on the window's modeline, return ON_MODE_LINE;
715 if it is on the border between the window and its right sibling,
716 return ON_VERTICAL_BORDER.
717 if it is on a scroll bar,
718 return ON_SCROLL_BAR.
719 if it is on the window's top line, return ON_HEADER_LINE;
720 if it is in left or right fringe of the window,
721 return ON_LEFT_FRINGE or ON_RIGHT_FRINGE, and convert *X and *Y
722 to window-relative coordinates;
723 if it is in the marginal area to the left/right of the window,
724 return ON_LEFT_MARGIN or ON_RIGHT_MARGIN, and convert *X and *Y
725 to window-relative coordinates.
727 X and Y are frame relative pixel coordinates. */
729 static enum window_part
730 coordinates_in_window (w
, x
, y
)
731 register struct window
*w
;
734 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
735 int left_x
, right_x
, top_y
, bottom_y
;
736 enum window_part part
;
737 int ux
= FRAME_COLUMN_WIDTH (f
);
738 int x0
= WINDOW_LEFT_EDGE_X (w
);
739 int x1
= WINDOW_RIGHT_EDGE_X (w
);
740 /* The width of the area where the vertical line can be dragged.
741 (Between mode lines for instance. */
742 int grabbable_width
= ux
;
743 int lmargin_width
, rmargin_width
, text_left
, text_right
;
745 /* In what's below, we subtract 1 when computing right_x because we
746 want the rightmost pixel, which is given by left_pixel+width-1. */
747 if (w
->pseudo_window_p
)
750 right_x
= WINDOW_TOTAL_WIDTH (w
) - 1;
751 top_y
= WINDOW_TOP_EDGE_Y (w
);
752 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
756 left_x
= WINDOW_BOX_LEFT_EDGE_X (w
);
757 right_x
= WINDOW_BOX_RIGHT_EDGE_X (w
) - 1;
758 top_y
= WINDOW_TOP_EDGE_Y (w
);
759 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
762 /* Outside any interesting row? */
763 if (*y
< top_y
|| *y
>= bottom_y
)
766 /* On the mode line or header line? If it's near the start of
767 the mode or header line of window that's has a horizontal
768 sibling, say it's on the vertical line. That's to be able
769 to resize windows horizontally in case we're using toolkit
772 if (WINDOW_WANTS_MODELINE_P (w
)
773 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
))
777 header_vertical_border_check
:
778 /* We're somewhere on the mode line. We consider the place
779 between mode lines of horizontally adjacent mode lines
780 as the vertical border. If scroll bars on the left,
781 return the right window. */
782 if (WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w
)
783 || WINDOW_RIGHTMOST_P (w
))
785 if (!WINDOW_LEFTMOST_P (w
) && abs (*x
- x0
) < grabbable_width
)
787 /* Convert X and Y to window relative coordinates.
788 Vertical border is at the left edge of window. */
789 *x
= max (0, *x
- x0
);
791 return ON_VERTICAL_BORDER
;
796 if (abs (*x
- x1
) < grabbable_width
)
798 /* Convert X and Y to window relative coordinates.
799 Vertical border is at the right edge of window. */
800 *x
= min (x1
, *x
) - x0
;
802 return ON_VERTICAL_BORDER
;
806 if (*x
< x0
|| *x
>= x1
)
809 /* Convert X and Y to window relative coordinates.
810 Mode line starts at left edge of window. */
816 if (WINDOW_WANTS_HEADER_LINE_P (w
)
817 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
))
819 part
= ON_HEADER_LINE
;
820 goto header_vertical_border_check
;
823 if (*x
< x0
|| *x
>= x1
)
826 /* Outside any interesting column? */
827 if (*x
< left_x
|| *x
> right_x
)
830 return ON_SCROLL_BAR
;
833 lmargin_width
= window_box_width (w
, LEFT_MARGIN_AREA
);
834 rmargin_width
= window_box_width (w
, RIGHT_MARGIN_AREA
);
836 text_left
= window_box_left (w
, TEXT_AREA
);
837 text_right
= text_left
+ window_box_width (w
, TEXT_AREA
);
839 if (FRAME_WINDOW_P (f
))
841 if (!w
->pseudo_window_p
842 && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w
)
843 && !WINDOW_RIGHTMOST_P (w
)
844 && (abs (*x
- right_x
) < grabbable_width
))
846 /* Convert X and Y to window relative coordinates.
847 Vertical border is at the right edge of window. */
848 *x
= min (right_x
, *x
) - left_x
;
850 return ON_VERTICAL_BORDER
;
855 /* Need to say "*x > right_x" rather than >=, since on character
856 terminals, the vertical line's x coordinate is right_x. */
857 if (!w
->pseudo_window_p
858 && !WINDOW_RIGHTMOST_P (w
)
859 && *x
> right_x
- ux
)
861 /* On the border on the right side of the window? Assume that
862 this area begins at RIGHT_X minus a canonical char width. */
863 *x
= min (right_x
, *x
) - left_x
;
865 return ON_VERTICAL_BORDER
;
871 if (lmargin_width
> 0
872 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
873 ? (*x
>= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
))
874 : (*x
< left_x
+ lmargin_width
)))
877 if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
878 *x
-= WINDOW_LEFT_FRINGE_WIDTH (w
);
880 return ON_LEFT_MARGIN
;
883 /* Convert X and Y to window-relative pixel coordinates. */
886 return ON_LEFT_FRINGE
;
889 if (*x
>= text_right
)
891 if (rmargin_width
> 0
892 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
893 ? (*x
< right_x
- WINDOW_RIGHT_FRINGE_WIDTH (w
))
894 : (*x
>= right_x
- rmargin_width
)))
896 *x
-= right_x
- rmargin_width
;
897 if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
898 *x
+= WINDOW_RIGHT_FRINGE_WIDTH (w
);
900 return ON_RIGHT_MARGIN
;
903 /* Convert X and Y to window-relative pixel coordinates. */
904 *x
-= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
);
906 return ON_RIGHT_FRINGE
;
909 /* Everything special ruled out - must be on text area */
916 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
917 Scoordinates_in_window_p
, 2, 2, 0,
918 doc
: /* Return non-nil if COORDINATES are in WINDOW.
919 COORDINATES is a cons of the form (X . Y), X and Y being distances
920 measured in characters from the upper-left corner of the frame.
921 \(0 . 0) denotes the character in the upper left corner of the
923 If COORDINATES are in the text portion of WINDOW,
924 the coordinates relative to the window are returned.
925 If they are in the mode line of WINDOW, `mode-line' is returned.
926 If they are in the top mode line of WINDOW, `header-line' is returned.
927 If they are in the left fringe of WINDOW, `left-fringe' is returned.
928 If they are in the right fringe of WINDOW, `right-fringe' is returned.
929 If they are on the border between WINDOW and its right sibling,
930 `vertical-line' is returned.
931 If they are in the windows's left or right marginal areas, `left-margin'\n\
932 or `right-margin' is returned. */)
933 (coordinates
, window
)
934 register Lisp_Object coordinates
, window
;
941 CHECK_WINDOW (window
);
942 w
= XWINDOW (window
);
943 f
= XFRAME (w
->frame
);
944 CHECK_CONS (coordinates
);
945 lx
= Fcar (coordinates
);
946 ly
= Fcdr (coordinates
);
947 CHECK_NUMBER_OR_FLOAT (lx
);
948 CHECK_NUMBER_OR_FLOAT (ly
);
949 x
= FRAME_PIXEL_X_FROM_CANON_X (f
, lx
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
950 y
= FRAME_PIXEL_Y_FROM_CANON_Y (f
, ly
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
952 switch (coordinates_in_window (w
, &x
, &y
))
958 /* X and Y are now window relative pixel coordinates. Convert
959 them to canonical char units before returning them. */
960 return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f
, x
),
961 FRAME_CANON_Y_FROM_PIXEL_Y (f
, y
));
966 case ON_VERTICAL_BORDER
:
967 return Qvertical_line
;
975 case ON_RIGHT_FRINGE
:
976 return Qright_fringe
;
981 case ON_RIGHT_MARGIN
:
982 return Qright_margin
;
985 /* Historically we are supposed to return nil in this case. */
994 /* Callback for foreach_window, used in window_from_coordinates.
995 Check if window W contains coordinates specified by USER_DATA which
996 is actually a pointer to a struct check_window_data CW.
998 Check if window W contains coordinates *CW->x and *CW->y. If it
999 does, return W in *CW->window, as Lisp_Object, and return in
1000 *CW->part the part of the window under coordinates *X,*Y. Return
1001 zero from this function to stop iterating over windows. */
1003 struct check_window_data
1005 Lisp_Object
*window
;
1007 enum window_part
*part
;
1011 check_window_containing (w
, user_data
)
1015 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
1016 enum window_part found
;
1019 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
1020 if (found
!= ON_NOTHING
)
1023 XSETWINDOW (*cw
->window
, w
);
1031 /* Find the window containing frame-relative pixel position X/Y and
1032 return it as a Lisp_Object.
1034 If X, Y is on one of the window's special `window_part' elements,
1035 set *PART to the id of that element, and return X and Y converted
1036 to window relative coordinates in WX and WY.
1038 If there is no window under X, Y return nil and leave *PART
1039 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
1041 This function was previously implemented with a loop cycling over
1042 windows with Fnext_window, and starting with the frame's selected
1043 window. It turned out that this doesn't work with an
1044 implementation of next_window using Vwindow_list, because
1045 FRAME_SELECTED_WINDOW (F) is not always contained in the window
1046 tree of F when this function is called asynchronously from
1047 note_mouse_highlight. The original loop didn't terminate in this
1051 window_from_coordinates (f
, x
, y
, part
, wx
, wy
, tool_bar_p
)
1054 enum window_part
*part
;
1059 struct check_window_data cw
;
1060 enum window_part dummy
;
1066 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
1067 foreach_window (f
, check_window_containing
, &cw
);
1069 /* If not found above, see if it's in the tool bar window, if a tool
1073 && WINDOWP (f
->tool_bar_window
)
1074 && WINDOW_TOTAL_LINES (XWINDOW (f
->tool_bar_window
)) > 0
1075 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
)
1079 window
= f
->tool_bar_window
;
1088 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
1089 doc
: /* Return window containing coordinates X and Y on FRAME.
1090 If omitted, FRAME defaults to the currently selected frame.
1091 The top left corner of the frame is considered to be row 0,
1094 Lisp_Object x
, y
, frame
;
1099 frame
= selected_frame
;
1100 CHECK_LIVE_FRAME (frame
);
1103 /* Check that arguments are integers or floats. */
1104 CHECK_NUMBER_OR_FLOAT (x
);
1105 CHECK_NUMBER_OR_FLOAT (y
);
1107 return window_from_coordinates (f
,
1108 (FRAME_PIXEL_X_FROM_CANON_X (f
, x
)
1109 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
1110 (FRAME_PIXEL_Y_FROM_CANON_Y (f
, y
)
1111 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
1115 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
1116 doc
: /* Return current value of point in WINDOW.
1117 WINDOW defaults to the selected window.
1119 For a nonselected window, this is the value point would have
1120 if that window were selected.
1122 Note that, when WINDOW is the selected window and its buffer
1123 is also currently selected, the value returned is the same as (point).
1124 It would be more strictly correct to return the `top-level' value
1125 of point, outside of any save-excursion forms.
1126 But that is hard to define. */)
1130 register struct window
*w
= decode_window (window
);
1132 if (w
== XWINDOW (selected_window
)
1133 && current_buffer
== XBUFFER (w
->buffer
))
1135 return Fmarker_position (w
->pointm
);
1138 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
1139 doc
: /* Return position at which display currently starts in WINDOW.
1140 WINDOW defaults to the selected window.
1141 This is updated by redisplay or by calling `set-window-start'. */)
1145 return Fmarker_position (decode_window (window
)->start
);
1148 /* This is text temporarily removed from the doc string below.
1150 This function returns nil if the position is not currently known.
1151 That happens when redisplay is preempted and doesn't finish.
1152 If in that case you want to compute where the end of the window would
1153 have been if redisplay had finished, do this:
1155 (goto-char (window-start window))
1156 (vertical-motion (1- (window-height window)) window)
1159 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
1160 doc
: /* Return position at which display currently ends in WINDOW.
1161 WINDOW defaults to the selected window.
1162 This is updated by redisplay, when it runs to completion.
1163 Simply changing the buffer text or setting `window-start'
1164 does not update this value.
1165 Return nil if there is no recorded value. \(This can happen if the
1166 last redisplay of WINDOW was preempted, and did not finish.)
1167 If UPDATE is non-nil, compute the up-to-date position
1168 if it isn't already recorded. */)
1170 Lisp_Object window
, update
;
1173 struct window
*w
= decode_window (window
);
1181 #if 0 /* This change broke some things. We should make it later. */
1182 /* If we don't know the end position, return nil.
1183 The user can compute it with vertical-motion if he wants to.
1184 It would be nicer to do it automatically,
1185 but that's so slow that it would probably bother people. */
1186 if (NILP (w
->window_end_valid
))
1191 && ! (! NILP (w
->window_end_valid
)
1192 && XFASTINT (w
->last_modified
) >= BUF_MODIFF (b
)
1193 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (b
))
1196 struct text_pos startp
;
1198 struct buffer
*old_buffer
= NULL
;
1200 /* Cannot use Fvertical_motion because that function doesn't
1201 cope with variable-height lines. */
1202 if (b
!= current_buffer
)
1204 old_buffer
= current_buffer
;
1205 set_buffer_internal (b
);
1208 /* In case W->start is out of the range, use something
1209 reasonable. This situation occurred when loading a file with
1210 `-l' containing a call to `rmail' with subsequent other
1211 commands. At the end, W->start happened to be BEG, while
1212 rmail had already narrowed the buffer. */
1213 if (XMARKER (w
->start
)->charpos
< BEGV
)
1214 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
1215 else if (XMARKER (w
->start
)->charpos
> ZV
)
1216 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
1218 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
1220 start_display (&it
, w
, startp
);
1221 move_it_vertically (&it
, window_box_height (w
));
1222 if (it
.current_y
< it
.last_visible_y
)
1223 move_it_past_eol (&it
);
1224 value
= make_number (IT_CHARPOS (it
));
1227 set_buffer_internal (old_buffer
);
1230 XSETINT (value
, BUF_Z (b
) - XFASTINT (w
->window_end_pos
));
1235 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
1236 doc
: /* Make point value in WINDOW be at position POS in WINDOW's buffer.
1239 Lisp_Object window
, pos
;
1241 register struct window
*w
= decode_window (window
);
1243 CHECK_NUMBER_COERCE_MARKER (pos
);
1244 if (w
== XWINDOW (selected_window
)
1245 && XBUFFER (w
->buffer
) == current_buffer
)
1248 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
1250 /* We have to make sure that redisplay updates the window to show
1251 the new value of point. */
1252 if (!EQ (window
, selected_window
))
1253 ++windows_or_buffers_changed
;
1258 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
1259 doc
: /* Make display in WINDOW start at position POS in WINDOW's buffer.
1261 Optional third arg NOFORCE non-nil inhibits next redisplay
1262 from overriding motion of point in order to display at this exact start. */)
1263 (window
, pos
, noforce
)
1264 Lisp_Object window
, pos
, noforce
;
1266 register struct window
*w
= decode_window (window
);
1268 CHECK_NUMBER_COERCE_MARKER (pos
);
1269 set_marker_restricted (w
->start
, pos
, w
->buffer
);
1270 /* this is not right, but much easier than doing what is right. */
1271 w
->start_at_line_beg
= Qnil
;
1273 w
->force_start
= Qt
;
1274 w
->update_mode_line
= Qt
;
1275 XSETFASTINT (w
->last_modified
, 0);
1276 XSETFASTINT (w
->last_overlay_modified
, 0);
1277 if (!EQ (window
, selected_window
))
1278 windows_or_buffers_changed
++;
1283 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
1285 doc
: /* Return WINDOW's dedicated object, usually t or nil.
1286 See also `set-window-dedicated-p'. */)
1290 return decode_window (window
)->dedicated
;
1293 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
1294 Sset_window_dedicated_p
, 2, 2, 0,
1295 doc
: /* Control whether WINDOW is dedicated to the buffer it displays.
1296 If it is dedicated, Emacs will not automatically change
1297 which buffer appears in it.
1298 The second argument is the new value for the dedication flag;
1299 non-nil means yes. */)
1301 Lisp_Object window
, arg
;
1303 register struct window
*w
= decode_window (window
);
1307 return w
->dedicated
;
1310 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1312 doc
: /* Return the display-table that WINDOW is using.
1313 WINDOW defaults to the selected window. */)
1317 return decode_window (window
)->display_table
;
1320 /* Get the display table for use on window W. This is either W's
1321 display table or W's buffer's display table. Ignore the specified
1322 tables if they are not valid; if no valid table is specified,
1325 struct Lisp_Char_Table
*
1326 window_display_table (w
)
1329 struct Lisp_Char_Table
*dp
= NULL
;
1331 if (DISP_TABLE_P (w
->display_table
))
1332 dp
= XCHAR_TABLE (w
->display_table
);
1333 else if (BUFFERP (w
->buffer
))
1335 struct buffer
*b
= XBUFFER (w
->buffer
);
1337 if (DISP_TABLE_P (b
->display_table
))
1338 dp
= XCHAR_TABLE (b
->display_table
);
1339 else if (DISP_TABLE_P (Vstandard_display_table
))
1340 dp
= XCHAR_TABLE (Vstandard_display_table
);
1346 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1347 doc
: /* Set WINDOW's display-table to TABLE. */)
1349 register Lisp_Object window
, table
;
1351 register struct window
*w
;
1353 w
= decode_window (window
);
1354 w
->display_table
= table
;
1358 /* Record info on buffer window w is displaying
1359 when it is about to cease to display that buffer. */
1362 register struct window
*w
;
1369 if (b
!= XMARKER (w
->pointm
)->buffer
)
1373 if (w
== XWINDOW (selected_window
)
1374 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1375 /* Do this except when the selected window's buffer
1376 is being removed from some other window. */
1378 /* last_window_start records the start position that this buffer
1379 had in the last window to be disconnected from it.
1380 Now that this statement is unconditional,
1381 it is possible for the buffer to be displayed in the
1382 selected window, while last_window_start reflects another
1383 window which was recently showing the same buffer.
1384 Some people might say that might be a good thing. Let's see. */
1385 b
->last_window_start
= marker_position (w
->start
);
1387 /* Point in the selected window's buffer
1388 is actually stored in that buffer, and the window's pointm isn't used.
1389 So don't clobber point in that buffer. */
1390 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1391 /* This line helps to fix Horsley's testbug.el bug. */
1392 && !(WINDOWP (b
->last_selected_window
)
1393 && w
!= XWINDOW (b
->last_selected_window
)
1394 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1395 temp_set_point_both (b
,
1396 clip_to_bounds (BUF_BEGV (b
),
1397 XMARKER (w
->pointm
)->charpos
,
1399 clip_to_bounds (BUF_BEGV_BYTE (b
),
1400 marker_byte_position (w
->pointm
),
1403 if (WINDOWP (b
->last_selected_window
)
1404 && w
== XWINDOW (b
->last_selected_window
))
1405 b
->last_selected_window
= Qnil
;
1408 /* Put replacement into the window structure in place of old. */
1410 replace_window (old
, replacement
)
1411 Lisp_Object old
, replacement
;
1413 register Lisp_Object tem
;
1414 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1416 /* If OLD is its frame's root_window, then replacement is the new
1417 root_window for that frame. */
1419 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1420 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1422 p
->left_col
= o
->left_col
;
1423 p
->top_line
= o
->top_line
;
1424 p
->total_cols
= o
->total_cols
;
1425 p
->total_lines
= o
->total_lines
;
1426 p
->desired_matrix
= p
->current_matrix
= 0;
1428 bzero (&p
->cursor
, sizeof (p
->cursor
));
1429 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1430 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1431 p
->phys_cursor_type
= -1;
1432 p
->phys_cursor_width
= -1;
1433 p
->must_be_updated_p
= 0;
1434 p
->pseudo_window_p
= 0;
1435 XSETFASTINT (p
->window_end_vpos
, 0);
1436 XSETFASTINT (p
->window_end_pos
, 0);
1437 p
->window_end_valid
= Qnil
;
1438 p
->frozen_window_start_p
= 0;
1439 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
1441 p
->next
= tem
= o
->next
;
1443 XWINDOW (tem
)->prev
= replacement
;
1445 p
->prev
= tem
= o
->prev
;
1447 XWINDOW (tem
)->next
= replacement
;
1449 p
->parent
= tem
= o
->parent
;
1452 if (EQ (XWINDOW (tem
)->vchild
, old
))
1453 XWINDOW (tem
)->vchild
= replacement
;
1454 if (EQ (XWINDOW (tem
)->hchild
, old
))
1455 XWINDOW (tem
)->hchild
= replacement
;
1458 /*** Here, if replacement is a vertical combination
1459 and so is its new parent, we should make replacement's
1460 children be children of that parent instead. ***/
1463 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1464 doc
: /* Remove WINDOW from the display. Default is selected window. */)
1466 register Lisp_Object window
;
1468 delete_window (window
);
1470 if (! NILP (Vwindow_configuration_change_hook
)
1471 && ! NILP (Vrun_hooks
))
1472 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1478 delete_window (window
)
1479 register Lisp_Object window
;
1481 register Lisp_Object tem
, parent
, sib
;
1482 register struct window
*p
;
1483 register struct window
*par
;
1486 /* Because this function is called by other C code on non-leaf
1487 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1488 so we can't decode_window here. */
1490 window
= selected_window
;
1492 CHECK_WINDOW (window
);
1493 p
= XWINDOW (window
);
1495 /* It's a no-op to delete an already-deleted window. */
1496 if (NILP (p
->buffer
)
1498 && NILP (p
->vchild
))
1503 error ("Attempt to delete minibuffer or sole ordinary window");
1504 par
= XWINDOW (parent
);
1506 windows_or_buffers_changed
++;
1507 Vwindow_list
= Qnil
;
1508 f
= XFRAME (WINDOW_FRAME (p
));
1509 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1511 /* Are we trying to delete any frame's selected window? */
1513 Lisp_Object swindow
, pwindow
;
1515 /* See if the frame's selected window is either WINDOW
1516 or any subwindow of it, by finding all that window's parents
1517 and comparing each one with WINDOW. */
1518 swindow
= FRAME_SELECTED_WINDOW (f
);
1523 while (!NILP (pwindow
))
1525 if (EQ (window
, pwindow
))
1527 pwindow
= XWINDOW (pwindow
)->parent
;
1530 /* If the window being deleted is not a parent of SWINDOW,
1531 then SWINDOW is ok as the new selected window. */
1532 if (!EQ (window
, pwindow
))
1534 /* Otherwise, try another window for SWINDOW. */
1535 swindow
= Fnext_window (swindow
, Qlambda
, Qnil
);;
1537 /* If we get back to the frame's selected window,
1538 it means there was no acceptable alternative,
1539 so we cannot delete. */
1540 if (EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1541 error ("Cannot delete window");
1544 /* If we need to change SWINDOW, do it. */
1545 if (! EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1547 /* If we're about to delete the selected window on the
1548 selected frame, then we should use Fselect_window to select
1549 the new window. On the other hand, if we're about to
1550 delete the selected window on any other frame, we shouldn't do
1551 anything but set the frame's selected_window slot. */
1552 if (EQ (FRAME_SELECTED_WINDOW (f
), selected_window
))
1553 Fselect_window (swindow
, Qnil
);
1555 FRAME_SELECTED_WINDOW (f
) = swindow
;
1559 /* Now we know we can delete this one. */
1560 window_deletion_count
++;
1563 /* tem is null for dummy parent windows
1564 (which have inferiors but not any contents themselves) */
1568 unchain_marker (XMARKER (p
->pointm
));
1569 unchain_marker (XMARKER (p
->start
));
1572 /* Free window glyph matrices. It is sure that they are allocated
1573 again when ADJUST_GLYPHS is called. Block input so that expose
1574 events and other events that access glyph matrices are not
1575 processed while we are changing them. */
1577 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1581 XWINDOW (tem
)->prev
= p
->prev
;
1585 XWINDOW (tem
)->next
= p
->next
;
1587 if (EQ (window
, par
->hchild
))
1588 par
->hchild
= p
->next
;
1589 if (EQ (window
, par
->vchild
))
1590 par
->vchild
= p
->next
;
1592 /* Find one of our siblings to give our space to. */
1596 /* If p gives its space to its next sibling, that sibling needs
1597 to have its top/left side pulled back to where p's is.
1598 set_window_{height,width} will re-position the sibling's
1601 XWINDOW (sib
)->top_line
= p
->top_line
;
1602 XWINDOW (sib
)->left_col
= p
->left_col
;
1605 /* Stretch that sibling. */
1606 if (!NILP (par
->vchild
))
1607 set_window_height (sib
,
1608 XFASTINT (XWINDOW (sib
)->total_lines
) + XFASTINT (p
->total_lines
),
1610 if (!NILP (par
->hchild
))
1611 set_window_width (sib
,
1612 XFASTINT (XWINDOW (sib
)->total_cols
) + XFASTINT (p
->total_cols
),
1615 /* If parent now has only one child,
1616 put the child into the parent's place. */
1620 if (NILP (XWINDOW (tem
)->next
)) {
1621 replace_window (parent
, tem
);
1622 par
= XWINDOW (tem
);
1625 /* Since we may be deleting combination windows, we must make sure that
1626 not only p but all its children have been marked as deleted. */
1627 if (! NILP (p
->hchild
))
1628 delete_all_subwindows (XWINDOW (p
->hchild
));
1629 else if (! NILP (p
->vchild
))
1630 delete_all_subwindows (XWINDOW (p
->vchild
));
1632 /* Mark this window as deleted. */
1633 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1635 if (! NILP (par
->parent
))
1636 par
= XWINDOW (par
->parent
);
1638 /* Check if we have a v/hchild with a v/hchild. In that case remove
1641 if (! NILP (par
->vchild
) && ! NILP (XWINDOW (par
->vchild
)->vchild
))
1643 p
= XWINDOW (par
->vchild
);
1644 par
->vchild
= p
->vchild
;
1647 else if (! NILP (par
->hchild
) && ! NILP (XWINDOW (par
->hchild
)->hchild
))
1649 p
= XWINDOW (par
->hchild
);
1650 par
->hchild
= p
->hchild
;
1658 while (! NILP (tem
)) {
1659 XWINDOW (tem
)->parent
= p
->parent
;
1660 if (NILP (XWINDOW (tem
)->next
))
1662 tem
= XWINDOW (tem
)->next
;
1665 /* The next of the v/hchild we are removing is now the next of the
1666 last child for the v/hchild:
1667 Before v/hchild -> v/hchild -> next1 -> next2
1670 After: v/hchild -> next1 -> next2 -> next3
1672 XWINDOW (tem
)->next
= p
->next
;
1673 if (! NILP (p
->next
))
1674 XWINDOW (p
->next
)->prev
= tem
;
1676 p
->next
= p
->prev
= p
->vchild
= p
->hchild
= p
->buffer
= Qnil
;
1680 /* Adjust glyph matrices. */
1687 /***********************************************************************
1689 ***********************************************************************/
1691 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1692 pointer. This is a callback function for foreach_window, used in
1693 function window_list. */
1696 add_window_to_list (w
, user_data
)
1700 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1702 XSETWINDOW (window
, w
);
1703 *list
= Fcons (window
, *list
);
1708 /* Return a list of all windows, for use by next_window. If
1709 Vwindow_list is a list, return that list. Otherwise, build a new
1710 list, cache it in Vwindow_list, and return that. */
1715 if (!CONSP (Vwindow_list
))
1719 Vwindow_list
= Qnil
;
1720 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1722 Lisp_Object args
[2];
1724 /* We are visiting windows in canonical order, and add
1725 new windows at the front of args[1], which means we
1726 have to reverse this list at the end. */
1728 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1729 args
[0] = Vwindow_list
;
1730 args
[1] = Fnreverse (args
[1]);
1731 Vwindow_list
= Fnconc (2, args
);
1735 return Vwindow_list
;
1739 /* Value is non-zero if WINDOW satisfies the constraints given by
1740 OWINDOW, MINIBUF and ALL_FRAMES.
1742 MINIBUF t means WINDOW may be minibuffer windows.
1743 `lambda' means WINDOW may not be a minibuffer window.
1744 a window means a specific minibuffer window
1746 ALL_FRAMES t means search all frames,
1747 nil means search just current frame,
1748 `visible' means search just visible frames,
1749 0 means search visible and iconified frames,
1750 a window means search the frame that window belongs to,
1751 a frame means consider windows on that frame, only. */
1754 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1755 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1757 struct window
*w
= XWINDOW (window
);
1758 struct frame
*f
= XFRAME (w
->frame
);
1759 int candidate_p
= 1;
1761 if (!BUFFERP (w
->buffer
))
1763 else if (MINI_WINDOW_P (w
)
1764 && (EQ (minibuf
, Qlambda
)
1765 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1767 /* If MINIBUF is `lambda' don't consider any mini-windows.
1768 If it is a window, consider only that one. */
1771 else if (EQ (all_frames
, Qt
))
1773 else if (NILP (all_frames
))
1775 xassert (WINDOWP (owindow
));
1776 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1778 else if (EQ (all_frames
, Qvisible
))
1780 FRAME_SAMPLE_VISIBILITY (f
);
1781 candidate_p
= FRAME_VISIBLE_P (f
);
1783 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1785 FRAME_SAMPLE_VISIBILITY (f
);
1786 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1788 else if (WINDOWP (all_frames
))
1789 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1790 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1791 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1792 else if (FRAMEP (all_frames
))
1793 candidate_p
= EQ (all_frames
, w
->frame
);
1799 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1800 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1804 decode_next_window_args (window
, minibuf
, all_frames
)
1805 Lisp_Object
*window
, *minibuf
, *all_frames
;
1808 *window
= selected_window
;
1810 CHECK_LIVE_WINDOW (*window
);
1812 /* MINIBUF nil may or may not include minibuffers. Decide if it
1814 if (NILP (*minibuf
))
1815 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1816 else if (!EQ (*minibuf
, Qt
))
1819 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1820 => count none of them, or a specific minibuffer window (the
1821 active one) to count. */
1823 /* ALL_FRAMES nil doesn't specify which frames to include. */
1824 if (NILP (*all_frames
))
1825 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1826 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1828 else if (EQ (*all_frames
, Qvisible
))
1830 else if (EQ (*all_frames
, make_number (0)))
1832 else if (FRAMEP (*all_frames
))
1834 else if (!EQ (*all_frames
, Qt
))
1837 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1838 search just current frame, `visible' meaning search just visible
1839 frames, 0 meaning search visible and iconified frames, or a
1840 window, meaning search the frame that window belongs to, or a
1841 frame, meaning consider windows on that frame, only. */
1845 /* Return the next or previous window of WINDOW in canonical ordering
1846 of windows. NEXT_P non-zero means return the next window. See the
1847 documentation string of next-window for the meaning of MINIBUF and
1851 next_window (window
, minibuf
, all_frames
, next_p
)
1852 Lisp_Object window
, minibuf
, all_frames
;
1855 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1857 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1858 return the first window on the frame. */
1859 if (FRAMEP (all_frames
)
1860 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1861 return Fframe_first_window (all_frames
);
1867 /* Find WINDOW in the list of all windows. */
1868 list
= Fmemq (window
, window_list ());
1870 /* Scan forward from WINDOW to the end of the window list. */
1872 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1873 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1876 /* Scan from the start of the window list up to WINDOW. */
1878 for (list
= Vwindow_list
;
1879 CONSP (list
) && !EQ (XCAR (list
), window
);
1881 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1885 window
= XCAR (list
);
1889 Lisp_Object candidate
, list
;
1891 /* Scan through the list of windows for candidates. If there are
1892 candidate windows in front of WINDOW, the last one of these
1893 is the one we want. If there are candidates following WINDOW
1894 in the list, again the last one of these is the one we want. */
1896 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1898 if (EQ (XCAR (list
), window
))
1900 if (WINDOWP (candidate
))
1903 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1905 candidate
= XCAR (list
);
1908 if (WINDOWP (candidate
))
1916 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1917 doc
: /* Return next window after WINDOW in canonical ordering of windows.
1918 If omitted, WINDOW defaults to the selected window.
1920 Optional second arg MINIBUF t means count the minibuffer window even
1921 if not active. MINIBUF nil or omitted means count the minibuffer iff
1922 it is active. MINIBUF neither t nor nil means not to count the
1923 minibuffer even if it is active.
1925 Several frames may share a single minibuffer; if the minibuffer
1926 counts, all windows on all frames that share that minibuffer count
1927 too. Therefore, `next-window' can be used to iterate through the
1928 set of windows even when the minibuffer is on another frame. If the
1929 minibuffer does not count, only windows from WINDOW's frame count.
1931 Optional third arg ALL-FRAMES t means include windows on all frames.
1932 ALL-FRAMES nil or omitted means cycle within the frames as specified
1933 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1934 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1935 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1936 Anything else means restrict to WINDOW's frame.
1938 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1939 `next-window' to iterate through the entire cycle of acceptable
1940 windows, eventually ending up back at the window you started with.
1941 `previous-window' traverses the same cycle, in the reverse order. */)
1942 (window
, minibuf
, all_frames
)
1943 Lisp_Object window
, minibuf
, all_frames
;
1945 return next_window (window
, minibuf
, all_frames
, 1);
1949 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1950 doc
: /* Return the window preceding WINDOW in canonical ordering of windows.
1951 If omitted, WINDOW defaults to the selected window.
1953 Optional second arg MINIBUF t means count the minibuffer window even
1954 if not active. MINIBUF nil or omitted means count the minibuffer iff
1955 it is active. MINIBUF neither t nor nil means not to count the
1956 minibuffer even if it is active.
1958 Several frames may share a single minibuffer; if the minibuffer
1959 counts, all windows on all frames that share that minibuffer count
1960 too. Therefore, `previous-window' can be used to iterate through
1961 the set of windows even when the minibuffer is on another frame. If
1962 the minibuffer does not count, only windows from WINDOW's frame count
1964 Optional third arg ALL-FRAMES t means include windows on all frames.
1965 ALL-FRAMES nil or omitted means cycle within the frames as specified
1966 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1967 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1968 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1969 Anything else means restrict to WINDOW's frame.
1971 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1972 `previous-window' to iterate through the entire cycle of acceptable
1973 windows, eventually ending up back at the window you started with.
1974 `next-window' traverses the same cycle, in the reverse order. */)
1975 (window
, minibuf
, all_frames
)
1976 Lisp_Object window
, minibuf
, all_frames
;
1978 return next_window (window
, minibuf
, all_frames
, 0);
1982 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1983 doc
: /* Select the ARG'th different window on this frame.
1984 All windows on current frame are arranged in a cyclic order.
1985 This command selects the window ARG steps away in that order.
1986 A negative ARG moves in the opposite order. The optional second
1987 argument ALL-FRAMES has the same meaning as in `next-window', which see. */)
1989 Lisp_Object arg
, all_frames
;
1995 window
= selected_window
;
1997 for (i
= XINT (arg
); i
> 0; --i
)
1998 window
= Fnext_window (window
, Qnil
, all_frames
);
2000 window
= Fprevious_window (window
, Qnil
, all_frames
);
2002 Fselect_window (window
, Qnil
);
2007 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
2008 doc
: /* Return a list of windows on FRAME, starting with WINDOW.
2009 FRAME nil or omitted means use the selected frame.
2010 WINDOW nil or omitted means use the selected window.
2011 MINIBUF t means include the minibuffer window, even if it isn't active.
2012 MINIBUF nil or omitted means include the minibuffer window only
2014 MINIBUF neither nil nor t means never include the minibuffer window. */)
2015 (frame
, minibuf
, window
)
2016 Lisp_Object frame
, minibuf
, window
;
2019 window
= FRAMEP (frame
) ? XFRAME (frame
)->selected_window
: selected_window
;
2020 CHECK_WINDOW (window
);
2022 frame
= selected_frame
;
2024 if (!EQ (frame
, XWINDOW (window
)->frame
))
2025 error ("Window is on a different frame");
2027 return window_list_1 (window
, minibuf
, frame
);
2031 /* Return a list of windows in canonical ordering. Arguments are like
2032 for `next-window'. */
2035 window_list_1 (window
, minibuf
, all_frames
)
2036 Lisp_Object window
, minibuf
, all_frames
;
2038 Lisp_Object tail
, list
, rest
;
2040 decode_next_window_args (&window
, &minibuf
, &all_frames
);
2043 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
2044 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
2045 list
= Fcons (XCAR (tail
), list
);
2047 /* Rotate the list to start with WINDOW. */
2048 list
= Fnreverse (list
);
2049 rest
= Fmemq (window
, list
);
2050 if (!NILP (rest
) && !EQ (rest
, list
))
2052 for (tail
= list
; !EQ (XCDR (tail
), rest
); tail
= XCDR (tail
))
2054 XSETCDR (tail
, Qnil
);
2055 list
= nconc2 (rest
, list
);
2062 /* Look at all windows, performing an operation specified by TYPE
2064 If FRAMES is Qt, look at all frames;
2065 Qnil, look at just the selected frame;
2066 Qvisible, look at visible frames;
2067 a frame, just look at windows on that frame.
2068 If MINI is non-zero, perform the operation on minibuffer windows too. */
2073 GET_BUFFER_WINDOW
, /* Arg is buffer */
2074 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
2075 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
2076 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
2078 UNSHOW_BUFFER
, /* Arg is buffer */
2079 REDISPLAY_BUFFER_WINDOWS
, /* Arg is buffer */
2084 window_loop (type
, obj
, mini
, frames
)
2085 enum window_loop type
;
2086 Lisp_Object obj
, frames
;
2089 Lisp_Object window
, windows
, best_window
, frame_arg
;
2091 struct gcpro gcpro1
;
2093 /* If we're only looping through windows on a particular frame,
2094 frame points to that frame. If we're looping through windows
2095 on all frames, frame is 0. */
2096 if (FRAMEP (frames
))
2097 f
= XFRAME (frames
);
2098 else if (NILP (frames
))
2099 f
= SELECTED_FRAME ();
2104 frame_arg
= Qlambda
;
2105 else if (EQ (frames
, make_number (0)))
2107 else if (EQ (frames
, Qvisible
))
2112 /* frame_arg is Qlambda to stick to one frame,
2113 Qvisible to consider all visible frames,
2116 /* Pick a window to start with. */
2120 window
= FRAME_SELECTED_WINDOW (f
);
2122 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
2124 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
2128 for (; CONSP (windows
); windows
= XCDR (windows
))
2132 window
= XCAR (windows
);
2133 w
= XWINDOW (window
);
2135 /* Note that we do not pay attention here to whether the frame
2136 is visible, since Fwindow_list skips non-visible frames if
2137 that is desired, under the control of frame_arg. */
2138 if (!MINI_WINDOW_P (w
)
2139 /* For UNSHOW_BUFFER, we must always consider all windows. */
2140 || type
== UNSHOW_BUFFER
2141 || (mini
&& minibuf_level
> 0))
2144 case GET_BUFFER_WINDOW
:
2145 if (EQ (w
->buffer
, obj
)
2146 /* Don't find any minibuffer window
2147 except the one that is currently in use. */
2148 && (MINI_WINDOW_P (w
)
2149 ? EQ (window
, minibuf_window
)
2152 if (NILP (best_window
))
2153 best_window
= window
;
2154 else if (EQ (window
, selected_window
))
2155 /* For compatibility with 20.x, prefer to return
2157 best_window
= window
;
2161 case GET_LRU_WINDOW
:
2162 /* `obj' is an integer encoding a bitvector.
2163 `obj & 1' means consider only full-width windows.
2164 `obj & 2' means consider also dedicated windows. */
2165 if (((XINT (obj
) & 1) && !WINDOW_FULL_WIDTH_P (w
))
2166 || (!(XINT (obj
) & 2) && !NILP (w
->dedicated
))
2167 /* Minibuffer windows are always ignored. */
2168 || MINI_WINDOW_P (w
))
2170 if (NILP (best_window
)
2171 || (XFASTINT (XWINDOW (best_window
)->use_time
)
2172 > XFASTINT (w
->use_time
)))
2173 best_window
= window
;
2176 case DELETE_OTHER_WINDOWS
:
2177 if (!EQ (window
, obj
))
2178 Fdelete_window (window
);
2181 case DELETE_BUFFER_WINDOWS
:
2182 if (EQ (w
->buffer
, obj
))
2184 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
2186 /* If this window is dedicated, and in a frame of its own,
2188 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2189 && !NILP (w
->dedicated
)
2190 && other_visible_frames (f
))
2192 /* Skip the other windows on this frame.
2193 There might be one, the minibuffer! */
2194 while (CONSP (XCDR (windows
))
2195 && EQ (XWINDOW (XCAR (windows
))->frame
,
2196 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2197 windows
= XCDR (windows
);
2199 /* Now we can safely delete the frame. */
2200 Fdelete_frame (w
->frame
, Qnil
);
2202 else if (NILP (w
->parent
))
2204 /* If we're deleting the buffer displayed in the
2205 only window on the frame, find a new buffer to
2208 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2209 Fset_window_buffer (window
, buffer
, Qnil
);
2210 if (EQ (window
, selected_window
))
2211 Fset_buffer (w
->buffer
);
2214 Fdelete_window (window
);
2218 case GET_LARGEST_WINDOW
:
2219 { /* nil `obj' means to ignore dedicated windows. */
2220 /* Ignore dedicated windows and minibuffers. */
2221 if (MINI_WINDOW_P (w
) || (NILP (obj
) && !NILP (w
->dedicated
)))
2224 if (NILP (best_window
))
2225 best_window
= window
;
2228 struct window
*b
= XWINDOW (best_window
);
2229 if (XFASTINT (w
->total_lines
) * XFASTINT (w
->total_cols
)
2230 > XFASTINT (b
->total_lines
) * XFASTINT (b
->total_cols
))
2231 best_window
= window
;
2237 if (EQ (w
->buffer
, obj
))
2240 struct frame
*f
= XFRAME (w
->frame
);
2242 /* Find another buffer to show in this window. */
2243 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2245 /* If this window is dedicated, and in a frame of its own,
2247 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2248 && !NILP (w
->dedicated
)
2249 && other_visible_frames (f
))
2251 /* Skip the other windows on this frame.
2252 There might be one, the minibuffer! */
2253 while (CONSP (XCDR (windows
))
2254 && EQ (XWINDOW (XCAR (windows
))->frame
,
2255 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2256 windows
= XCDR (windows
);
2258 /* Now we can safely delete the frame. */
2259 Fdelete_frame (w
->frame
, Qnil
);
2261 else if (!NILP (w
->dedicated
) && !NILP (w
->parent
))
2264 XSETWINDOW (window
, w
);
2265 /* If this window is dedicated and not the only window
2266 in its frame, then kill it. */
2267 Fdelete_window (window
);
2271 /* Otherwise show a different buffer in the window. */
2272 w
->dedicated
= Qnil
;
2273 Fset_window_buffer (window
, buffer
, Qnil
);
2274 if (EQ (window
, selected_window
))
2275 Fset_buffer (w
->buffer
);
2280 case REDISPLAY_BUFFER_WINDOWS
:
2281 if (EQ (w
->buffer
, obj
))
2283 mark_window_display_accurate (window
, 0);
2284 w
->update_mode_line
= Qt
;
2285 XBUFFER (obj
)->prevent_redisplay_optimizations_p
= 1;
2286 ++update_mode_lines
;
2287 best_window
= window
;
2291 /* Check for a window that has a killed buffer. */
2292 case CHECK_ALL_WINDOWS
:
2293 if (! NILP (w
->buffer
)
2294 && NILP (XBUFFER (w
->buffer
)->name
))
2298 case WINDOW_LOOP_UNUSED
:
2307 /* Used for debugging. Abort if any window has a dead buffer. */
2310 check_all_windows ()
2312 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
2315 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 2, 0,
2316 doc
: /* Return the window least recently selected or used for display.
2317 Return a full-width window if possible.
2318 A minibuffer window is never a candidate.
2319 A dedicated window is never a candidate, unless DEDICATED is non-nil,
2320 so if all windows are dedicated, the value is nil.
2321 If optional argument FRAME is `visible', search all visible frames.
2322 If FRAME is 0, search all visible and iconified frames.
2323 If FRAME is t, search all frames.
2324 If FRAME is nil, search only the selected frame.
2325 If FRAME is a frame, search only that frame. */)
2327 Lisp_Object frame
, dedicated
;
2329 register Lisp_Object w
;
2330 /* First try for a window that is full-width */
2331 w
= window_loop (GET_LRU_WINDOW
,
2332 NILP (dedicated
) ? make_number (1) : make_number (3),
2334 if (!NILP (w
) && !EQ (w
, selected_window
))
2336 /* If none of them, try the rest */
2337 return window_loop (GET_LRU_WINDOW
,
2338 NILP (dedicated
) ? make_number (0) : make_number (2),
2342 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 2, 0,
2343 doc
: /* Return the largest window in area.
2344 A minibuffer window is never a candidate.
2345 A dedicated window is never a candidate unless DEDICATED is non-nil,
2346 so if all windows are dedicated, the value is nil.
2347 If optional argument FRAME is `visible', search all visible frames.
2348 If FRAME is 0, search all visible and iconified frames.
2349 If FRAME is t, search all frames.
2350 If FRAME is nil, search only the selected frame.
2351 If FRAME is a frame, search only that frame. */)
2353 Lisp_Object frame
, dedicated
;
2355 return window_loop (GET_LARGEST_WINDOW
, dedicated
, 0,
2359 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
2360 doc
: /* Return a window currently displaying BUFFER, or nil if none.
2361 BUFFER can be a buffer or a buffer name.
2362 If optional argument FRAME is `visible', search all visible frames.
2363 If optional argument FRAME is 0, search all visible and iconified frames.
2364 If FRAME is t, search all frames.
2365 If FRAME is nil, search only the selected frame.
2366 If FRAME is a frame, search only that frame. */)
2368 Lisp_Object buffer
, frame
;
2370 buffer
= Fget_buffer (buffer
);
2371 if (BUFFERP (buffer
))
2372 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
2377 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
2379 doc
: /* Make WINDOW (or the selected window) fill its frame.
2380 Only the frame WINDOW is on is affected.
2381 This function tries to reduce display jumps
2382 by keeping the text previously visible in WINDOW
2383 in the same place on the frame. Doing this depends on
2384 the value of (window-start WINDOW), so if calling this function
2385 in a program gives strange scrolling, make sure the window-start
2386 value is reasonable when this function is called. */)
2395 window
= selected_window
;
2397 CHECK_LIVE_WINDOW (window
);
2398 w
= XWINDOW (window
);
2400 startpos
= marker_position (w
->start
);
2401 top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2403 if (MINI_WINDOW_P (w
) && top
> 0)
2404 error ("Can't expand minibuffer to full frame");
2406 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2408 /* Try to minimize scrolling, by setting the window start to the point
2409 will cause the text at the old window start to be at the same place
2410 on the frame. But don't try to do this if the window start is
2411 outside the visible portion (as might happen when the display is
2412 not current, due to typeahead). */
2413 new_top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2415 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2416 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2418 struct position pos
;
2419 struct buffer
*obuf
= current_buffer
;
2421 Fset_buffer (w
->buffer
);
2422 /* This computation used to temporarily move point, but that can
2423 have unwanted side effects due to text properties. */
2424 pos
= *vmotion (startpos
, -top
, w
);
2426 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2427 w
->window_end_valid
= Qnil
;
2428 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2429 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2431 /* We need to do this, so that the window-scroll-functions
2433 w
->optional_new_start
= Qt
;
2435 set_buffer_internal (obuf
);
2441 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2442 1, 2, "bDelete windows on (buffer): ",
2443 doc
: /* Delete all windows showing BUFFER.
2444 BUFFER must be a buffer or the name of an existing buffer.
2445 Optional second argument FRAME controls which frames are affected.
2446 If optional argument FRAME is `visible', search all visible frames.
2447 If FRAME is 0, search all visible and iconified frames.
2448 If FRAME is nil, search all frames.
2449 If FRAME is t, search only the selected frame.
2450 If FRAME is a frame, search only that frame. */)
2452 Lisp_Object buffer
, frame
;
2454 /* FRAME uses t and nil to mean the opposite of what window_loop
2458 else if (EQ (frame
, Qt
))
2463 buffer
= Fget_buffer (buffer
);
2464 CHECK_BUFFER (buffer
);
2465 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2471 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2472 Sreplace_buffer_in_windows
,
2473 1, 1, "bReplace buffer in windows: ",
2474 doc
: /* Replace BUFFER with some other buffer in all windows showing it.
2475 BUFFER may be a buffer or the name of an existing buffer. */)
2481 buffer
= Fget_buffer (buffer
);
2482 CHECK_BUFFER (buffer
);
2483 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2488 /* Replace BUFFER with some other buffer in all windows
2489 of all frames, even those on other keyboards. */
2492 replace_buffer_in_all_windows (buffer
)
2496 Lisp_Object tail
, frame
;
2498 /* A single call to window_loop won't do the job
2499 because it only considers frames on the current keyboard.
2500 So loop manually over frames, and handle each one. */
2501 FOR_EACH_FRAME (tail
, frame
)
2502 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2504 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2508 /* Set the height of WINDOW and all its inferiors. */
2510 /* The smallest acceptable dimensions for a window. Anything smaller
2511 might crash Emacs. */
2513 #define MIN_SAFE_WINDOW_WIDTH (2)
2514 #define MIN_SAFE_WINDOW_HEIGHT (1)
2516 /* Make sure that window_min_height and window_min_width are
2517 not too small; if they are, set them to safe minima. */
2520 check_min_window_sizes ()
2522 /* Smaller values might permit a crash. */
2523 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2524 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2525 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2526 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2529 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2530 minimum allowable size. */
2533 check_frame_size (frame
, rows
, cols
)
2537 /* For height, we have to see:
2538 how many windows the frame has at minimum (one or two),
2539 and whether it has a menu bar or other special stuff at the top. */
2541 = ((FRAME_MINIBUF_ONLY_P (frame
) || ! FRAME_HAS_MINIBUF_P (frame
))
2542 ? MIN_SAFE_WINDOW_HEIGHT
2543 : 2 * MIN_SAFE_WINDOW_HEIGHT
);
2545 if (FRAME_TOP_MARGIN (frame
) > 0)
2546 min_height
+= FRAME_TOP_MARGIN (frame
);
2548 if (*rows
< min_height
)
2550 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2551 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2555 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2556 check if W's width can be changed, otherwise check W's height.
2557 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2558 siblings, too. If none of the siblings is resizable, WINDOW isn't
2562 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2564 int width_p
, check_siblings_p
;
2569 if (!NILP (w
->hchild
))
2571 c
= XWINDOW (w
->hchild
);
2575 /* A horiz. combination is fixed-width if all of if its
2577 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2578 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2579 fixed_p
= c
== NULL
;
2583 /* A horiz. combination is fixed-height if one of if its
2585 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2586 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2587 fixed_p
= c
!= NULL
;
2590 else if (!NILP (w
->vchild
))
2592 c
= XWINDOW (w
->vchild
);
2596 /* A vert. combination is fixed-width if one of if its
2598 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2599 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2600 fixed_p
= c
!= NULL
;
2604 /* A vert. combination is fixed-height if all of if its
2606 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2607 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2608 fixed_p
= c
== NULL
;
2611 else if (BUFFERP (w
->buffer
))
2613 struct buffer
*old
= current_buffer
;
2616 current_buffer
= XBUFFER (w
->buffer
);
2617 val
= find_symbol_value (Qwindow_size_fixed
);
2618 current_buffer
= old
;
2621 if (!EQ (val
, Qunbound
))
2623 fixed_p
= !NILP (val
);
2626 && ((EQ (val
, Qheight
) && width_p
)
2627 || (EQ (val
, Qwidth
) && !width_p
)))
2631 /* Can't tell if this one is resizable without looking at
2632 siblings. If all siblings are fixed-size this one is too. */
2633 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2637 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2638 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2642 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2643 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2657 /* Return the minimum size of window W, not taking fixed-width windows
2658 into account. WIDTH_P non-zero means return the minimum width,
2659 otherwise return the minimum height. If W is a combination window,
2660 compute the minimum size from the minimum sizes of W's children. */
2663 window_min_size_1 (w
, width_p
)
2670 if (!NILP (w
->hchild
))
2672 c
= XWINDOW (w
->hchild
);
2677 /* The min width of a horizontal combination is
2678 the sum of the min widths of its children. */
2681 size
+= window_min_size_1 (c
, width_p
);
2682 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2687 /* The min height a horizontal combination equals
2688 the maximum of all min height of its children. */
2691 int min_size
= window_min_size_1 (c
, width_p
);
2692 size
= max (min_size
, size
);
2693 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2697 else if (!NILP (w
->vchild
))
2699 c
= XWINDOW (w
->vchild
);
2704 /* The min width of a vertical combination is
2705 the maximum of the min widths of its children. */
2708 int min_size
= window_min_size_1 (c
, width_p
);
2709 size
= max (min_size
, size
);
2710 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2715 /* The min height of a vertical combination equals
2716 the sum of the min height of its children. */
2719 size
+= window_min_size_1 (c
, width_p
);
2720 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2727 size
= max (window_min_width
,
2728 (MIN_SAFE_WINDOW_WIDTH
2729 + WINDOW_FRINGE_COLS (w
)
2730 + WINDOW_SCROLL_BAR_COLS (w
)));
2733 if (MINI_WINDOW_P (w
)
2734 || (!WINDOW_WANTS_MODELINE_P (w
)
2735 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2738 size
= window_min_height
;
2746 /* Return the minimum size of window W, taking fixed-size windows into
2747 account. WIDTH_P non-zero means return the minimum width,
2748 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2749 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2750 unless FIXED is null. */
2753 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2755 int width_p
, ignore_fixed_p
, *fixed
;
2762 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2768 size
= width_p
? XFASTINT (w
->total_cols
) : XFASTINT (w
->total_lines
);
2770 size
= window_min_size_1 (w
, width_p
);
2776 /* Adjust the margins of window W if text area is too small.
2777 Return 1 if window width is ok after adjustment; 0 if window
2778 is still too narrow. */
2781 adjust_window_margins (w
)
2784 int box_cols
= (WINDOW_TOTAL_COLS (w
)
2785 - WINDOW_FRINGE_COLS (w
)
2786 - WINDOW_SCROLL_BAR_COLS (w
));
2787 int margin_cols
= (WINDOW_LEFT_MARGIN_COLS (w
)
2788 + WINDOW_RIGHT_MARGIN_COLS (w
));
2790 if (box_cols
- margin_cols
>= MIN_SAFE_WINDOW_WIDTH
)
2793 if (margin_cols
< 0 || box_cols
< MIN_SAFE_WINDOW_WIDTH
)
2796 /* Window's text area is too narrow, but reducing the window
2797 margins will fix that. */
2798 margin_cols
= box_cols
- MIN_SAFE_WINDOW_WIDTH
;
2799 if (WINDOW_RIGHT_MARGIN_COLS (w
) > 0)
2801 if (WINDOW_LEFT_MARGIN_COLS (w
) > 0)
2802 w
->left_margin_cols
= w
->right_margin_cols
2803 = make_number (margin_cols
/2);
2805 w
->right_margin_cols
= make_number (margin_cols
);
2808 w
->left_margin_cols
= make_number (margin_cols
);
2812 /* Calculate new sizes for windows in the list FORWARD when the window size
2813 goes from TOTAL to SIZE. TOTAL must be greater than SIZE.
2814 The number of windows in FORWARD is NCHILDREN, and the number that
2815 can shrink is SHRINKABLE.
2816 The minimum size a window can have is MIN_SIZE.
2817 If we are shrinking fixed windows, RESIZE_FIXED_P is non-zero.
2818 If we are shrinking columns, WIDTH_P is non-zero, otherwise we are
2821 This function returns an allocated array of new sizes that the caller
2822 must free. The size -1 means the window is fixed and RESIZE_FIXED_P
2823 is zero. Array index 0 refers to the first window in FORWARD, 1 to
2824 the second, and so on.
2826 This function tries to keep windows at least at the minimum size
2827 and resize other windows before it resizes any window to zero (i.e.
2828 delete that window).
2830 Windows are resized proportional to their size, so bigger windows
2831 shrink more than smaller windows. */
2833 shrink_windows (total
, size
, nchildren
, shrinkable
,
2834 min_size
, resize_fixed_p
, forward
, width_p
)
2835 int total
, size
, nchildren
, shrinkable
, min_size
;
2836 int resize_fixed_p
, width_p
;
2837 Lisp_Object forward
;
2839 int available_resize
= 0;
2843 int smallest
= total
;
2844 int total_removed
= 0;
2845 int total_shrink
= total
- size
;
2848 new_sizes
= xmalloc (sizeof (*new_sizes
) * nchildren
);
2850 for (i
= 0, child
= forward
; !NILP (child
); child
= c
->next
, ++i
)
2854 c
= XWINDOW (child
);
2855 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2857 if (! resize_fixed_p
&& window_fixed_size_p (c
, width_p
, 0))
2861 new_sizes
[i
] = child_size
;
2862 if (child_size
> min_size
)
2863 available_resize
+= child_size
- min_size
;
2866 /* We might need to shrink some windows to zero. Find the smallest
2867 windows and set them to 0 until we can fulfil the new size. */
2869 while (shrinkable
> 1 && size
+ available_resize
< total
)
2871 for (i
= 0; i
< nchildren
; ++i
)
2872 if (new_sizes
[i
] > 0 && smallest
> new_sizes
[i
])
2873 smallest
= new_sizes
[i
];
2875 for (i
= 0; i
< nchildren
; ++i
)
2876 if (new_sizes
[i
] == smallest
)
2878 /* Resize this window down to zero. */
2880 if (smallest
> min_size
)
2881 available_resize
-= smallest
- min_size
;
2882 available_resize
+= smallest
;
2884 total_removed
+= smallest
;
2886 /* We don't know what the smallest is now. */
2889 /* Out of for, just remove one window at the time and
2890 check again if we have enough space. */
2895 /* Now, calculate the new sizes. Try to shrink each window
2896 proportional to its size. */
2897 for (i
= 0; i
< nchildren
; ++i
)
2899 if (new_sizes
[i
] > min_size
)
2901 int to_shrink
= total_shrink
*new_sizes
[i
]/total
;
2902 if (new_sizes
[i
] - to_shrink
< min_size
)
2903 to_shrink
= new_sizes
[i
] - min_size
;
2904 new_sizes
[i
] -= to_shrink
;
2905 total_removed
+= to_shrink
;
2909 /* Any reminder due to rounding, we just subtract from windows
2910 that are left and still can be shrunk. */
2911 while (total_shrink
> total_removed
)
2913 int nonzero_sizes
= 0;
2914 int nonzero_idx
= -1;
2916 for (i
= 0; i
< nchildren
; ++i
)
2917 if (new_sizes
[i
] > 0)
2923 for (i
= 0; i
< nchildren
; ++i
)
2924 if (new_sizes
[i
] > min_size
)
2929 /* Out of for, just shrink one window at the time and
2930 check again if we have enough space. */
2935 /* Special case, only one window left. */
2936 if (nonzero_sizes
== 1)
2940 /* Any surplus due to rounding, we add to windows that are left. */
2941 while (total_shrink
< total_removed
)
2943 for (i
= 0; i
< nchildren
; ++i
)
2945 if (new_sizes
[i
] != 0 && total_shrink
< total_removed
)
2957 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2958 WINDOW's width. Resize WINDOW's children, if any, so that they
2959 keep their proportionate size relative to WINDOW.
2961 If FIRST_ONLY is 1, change only the first of WINDOW's children when
2962 they are in series. If LAST_ONLY is 1, change only the last of
2963 WINDOW's children when they are in series.
2965 Propagate WINDOW's top or left edge position to children. Delete
2966 windows that become too small unless NODELETE_P is non-zero.
2968 If NODELETE_P is 2, that means we do delete windows that are
2969 too small, even if they were too small before! */
2972 size_window (window
, size
, width_p
, nodelete_p
, first_only
, last_only
)
2974 int size
, width_p
, nodelete_p
;
2975 int first_only
, last_only
;
2977 struct window
*w
= XWINDOW (window
);
2979 Lisp_Object child
, *forward
, *sideward
;
2980 int old_size
, min_size
, safe_min_size
;
2982 /* We test nodelete_p != 2 and nodelete_p != 1 below, so it
2983 seems like it's too soon to do this here. ++KFS. */
2984 if (nodelete_p
== 2)
2987 check_min_window_sizes ();
2988 size
= max (0, size
);
2990 /* If the window has been "too small" at one point,
2991 don't delete it for being "too small" in the future.
2992 Preserve it as long as that is at all possible. */
2995 old_size
= WINDOW_TOTAL_COLS (w
);
2996 min_size
= window_min_width
;
2997 /* Ensure that there is room for the scroll bar and fringes!
2998 We may reduce display margins though. */
2999 safe_min_size
= (MIN_SAFE_WINDOW_WIDTH
3000 + WINDOW_FRINGE_COLS (w
)
3001 + WINDOW_SCROLL_BAR_COLS (w
));
3005 old_size
= XINT (w
->total_lines
);
3006 min_size
= window_min_height
;
3007 safe_min_size
= MIN_SAFE_WINDOW_HEIGHT
;
3010 if (old_size
< min_size
&& nodelete_p
!= 2)
3011 w
->too_small_ok
= Qt
;
3013 /* Maybe delete WINDOW if it's too small. */
3014 if (nodelete_p
!= 1 && !NILP (w
->parent
))
3016 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
3017 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
3018 if (min_size
< safe_min_size
)
3019 min_size
= safe_min_size
;
3020 if (size
< min_size
)
3022 delete_window (window
);
3027 /* Set redisplay hints. */
3028 w
->last_modified
= make_number (0);
3029 w
->last_overlay_modified
= make_number (0);
3030 windows_or_buffers_changed
++;
3031 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
3035 sideward
= &w
->vchild
;
3036 forward
= &w
->hchild
;
3037 w
->total_cols
= make_number (size
);
3038 adjust_window_margins (w
);
3042 sideward
= &w
->hchild
;
3043 forward
= &w
->vchild
;
3044 w
->total_lines
= make_number (size
);
3045 w
->orig_total_lines
= Qnil
;
3048 if (!NILP (*sideward
))
3050 /* We have a chain of parallel siblings whose size should all change. */
3051 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
3053 c
= XWINDOW (child
);
3055 c
->left_col
= w
->left_col
;
3057 c
->top_line
= w
->top_line
;
3058 size_window (child
, size
, width_p
, nodelete_p
,
3059 first_only
, last_only
);
3062 else if (!NILP (*forward
) && last_only
)
3064 /* Change the last in a series of siblings. */
3065 Lisp_Object last_child
;
3068 for (child
= *forward
; !NILP (child
); child
= c
->next
)
3070 c
= XWINDOW (child
);
3074 child_size
= XINT (width_p
? c
->total_cols
: c
->total_lines
);
3075 size_window (last_child
,
3076 size
- old_size
+ child_size
,
3077 width_p
, nodelete_p
, first_only
, last_only
);
3079 else if (!NILP (*forward
) && first_only
)
3081 /* Change the first in a series of siblings. */
3085 c
= XWINDOW (child
);
3088 c
->left_col
= w
->left_col
;
3090 c
->top_line
= w
->top_line
;
3092 child_size
= XINT (width_p
? c
->total_cols
: c
->total_lines
);
3094 size
- old_size
+ child_size
,
3095 width_p
, nodelete_p
, first_only
, last_only
);
3097 else if (!NILP (*forward
))
3099 int fixed_size
, each
, extra
, n
;
3100 int resize_fixed_p
, nfixed
;
3101 int last_pos
, first_pos
, nchildren
, total
;
3102 int *new_sizes
= NULL
;
3104 /* Determine the fixed-size portion of this window, and the
3105 number of child windows. */
3106 fixed_size
= nchildren
= nfixed
= total
= 0;
3107 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
3111 c
= XWINDOW (child
);
3112 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
3113 total
+= child_size
;
3115 if (window_fixed_size_p (c
, width_p
, 0))
3117 fixed_size
+= child_size
;
3122 /* If the new size is smaller than fixed_size, or if there
3123 aren't any resizable windows, allow resizing fixed-size
3125 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
3127 /* Compute how many lines/columns to add/remove to each child. The
3128 value of extra takes care of rounding errors. */
3129 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
3130 if (size
< total
&& n
> 1)
3131 new_sizes
= shrink_windows (total
, size
, nchildren
, n
, min_size
,
3132 resize_fixed_p
, *forward
, width_p
);
3135 each
= (size
- total
) / n
;
3136 extra
= (size
- total
) - n
* each
;
3139 /* Compute new children heights and edge positions. */
3140 first_pos
= width_p
? XINT (w
->left_col
) : XINT (w
->top_line
);
3141 last_pos
= first_pos
;
3142 for (n
= 0, child
= *forward
; !NILP (child
); child
= c
->next
, ++n
)
3144 int new_size
, old_size
;
3146 c
= XWINDOW (child
);
3147 old_size
= width_p
? XFASTINT (c
->total_cols
) : XFASTINT (c
->total_lines
);
3148 new_size
= old_size
;
3150 /* The top or left edge position of this child equals the
3151 bottom or right edge of its predecessor. */
3153 c
->left_col
= make_number (last_pos
);
3155 c
->top_line
= make_number (last_pos
);
3157 /* If this child can be resized, do it. */
3158 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
3160 new_size
= new_sizes
? new_sizes
[n
] : old_size
+ each
+ extra
;
3164 /* Set new height. Note that size_window also propagates
3165 edge positions to children, so it's not a no-op if we
3166 didn't change the child's size. */
3167 size_window (child
, new_size
, width_p
, 1, first_only
, last_only
);
3169 /* Remember the bottom/right edge position of this child; it
3170 will be used to set the top/left edge of the next child. */
3171 last_pos
+= new_size
;
3174 if (new_sizes
) xfree (new_sizes
);
3176 /* We should have covered the parent exactly with child windows. */
3177 xassert (size
== last_pos
- first_pos
);
3179 /* Now delete any children that became too small. */
3181 for (child
= *forward
; !NILP (child
); child
= c
->next
)
3184 c
= XWINDOW (child
);
3185 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
3186 size_window (child
, child_size
, width_p
, 2, first_only
, last_only
);
3191 /* Set WINDOW's height to HEIGHT, and recursively change the height of
3192 WINDOW's children. NODELETE non-zero means don't delete windows
3193 that become too small in the process. (The caller should check
3194 later and do so if appropriate.) */
3197 set_window_height (window
, height
, nodelete
)
3202 size_window (window
, height
, 0, nodelete
, 0, 0);
3206 /* Set WINDOW's width to WIDTH, and recursively change the width of
3207 WINDOW's children. NODELETE non-zero means don't delete windows
3208 that become too small in the process. (The caller should check
3209 later and do so if appropriate.) */
3212 set_window_width (window
, width
, nodelete
)
3217 size_window (window
, width
, 1, nodelete
, 0, 0);
3220 /* Change window heights in windows rooted in WINDOW by N lines. */
3223 change_window_heights (window
, n
)
3227 struct window
*w
= XWINDOW (window
);
3229 XSETFASTINT (w
->top_line
, XFASTINT (w
->top_line
) + n
);
3230 XSETFASTINT (w
->total_lines
, XFASTINT (w
->total_lines
) - n
);
3232 if (INTEGERP (w
->orig_top_line
))
3233 XSETFASTINT (w
->orig_top_line
, XFASTINT (w
->orig_top_line
) + n
);
3234 if (INTEGERP (w
->orig_total_lines
))
3235 XSETFASTINT (w
->orig_total_lines
, XFASTINT (w
->orig_total_lines
) - n
);
3237 /* Handle just the top child in a vertical split. */
3238 if (!NILP (w
->vchild
))
3239 change_window_heights (w
->vchild
, n
);
3241 /* Adjust all children in a horizontal split. */
3242 for (window
= w
->hchild
; !NILP (window
); window
= w
->next
)
3244 w
= XWINDOW (window
);
3245 change_window_heights (window
, n
);
3250 int window_select_count
;
3253 Fset_window_buffer_unwind (obuf
)
3260 EXFUN (Fset_window_fringes
, 4);
3261 EXFUN (Fset_window_scroll_bars
, 4);
3263 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
3264 means it's allowed to run hooks. See make_frame for a case where
3265 it's not allowed. KEEP_MARGINS_P non-zero means that the current
3266 margins, fringes, and scroll-bar settings of the window are not
3267 reset from the buffer's local settings. */
3270 set_window_buffer (window
, buffer
, run_hooks_p
, keep_margins_p
)
3271 Lisp_Object window
, buffer
;
3272 int run_hooks_p
, keep_margins_p
;
3274 struct window
*w
= XWINDOW (window
);
3275 struct buffer
*b
= XBUFFER (buffer
);
3276 int count
= SPECPDL_INDEX ();
3280 if (EQ (window
, selected_window
))
3281 b
->last_selected_window
= window
;
3283 /* Let redisplay errors through. */
3284 b
->display_error_modiff
= 0;
3286 /* Update time stamps of buffer display. */
3287 if (INTEGERP (b
->display_count
))
3288 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
3289 b
->display_time
= Fcurrent_time ();
3291 XSETFASTINT (w
->window_end_pos
, 0);
3292 XSETFASTINT (w
->window_end_vpos
, 0);
3293 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
3294 w
->window_end_valid
= Qnil
;
3295 w
->hscroll
= w
->min_hscroll
= make_number (0);
3297 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
3298 set_marker_restricted (w
->start
,
3299 make_number (b
->last_window_start
),
3301 w
->start_at_line_beg
= Qnil
;
3302 w
->force_start
= Qnil
;
3303 XSETFASTINT (w
->last_modified
, 0);
3304 XSETFASTINT (w
->last_overlay_modified
, 0);
3305 windows_or_buffers_changed
++;
3307 /* We must select BUFFER for running the window-scroll-functions.
3308 If WINDOW is selected, switch permanently.
3309 Otherwise, switch but go back to the ambient buffer afterward. */
3310 if (EQ (window
, selected_window
))
3311 Fset_buffer (buffer
);
3312 /* We can't check ! NILP (Vwindow_scroll_functions) here
3313 because that might itself be a local variable. */
3314 else if (window_initialized
)
3316 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
3317 Fset_buffer (buffer
);
3320 if (!keep_margins_p
)
3322 /* Set left and right marginal area width etc. from buffer. */
3324 /* This may call adjust_window_margins three times, so
3325 temporarily disable window margins. */
3326 Lisp_Object save_left
= w
->left_margin_cols
;
3327 Lisp_Object save_right
= w
->right_margin_cols
;
3329 w
->left_margin_cols
= w
->right_margin_cols
= Qnil
;
3331 Fset_window_fringes (window
,
3332 b
->left_fringe_width
, b
->right_fringe_width
,
3333 b
->fringes_outside_margins
);
3335 Fset_window_scroll_bars (window
,
3336 b
->scroll_bar_width
,
3337 b
->vertical_scroll_bar_type
, Qnil
);
3339 w
->left_margin_cols
= save_left
;
3340 w
->right_margin_cols
= save_right
;
3342 Fset_window_margins (window
,
3343 b
->left_margin_cols
, b
->right_margin_cols
);
3348 if (! NILP (Vwindow_scroll_functions
))
3349 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
3350 Fmarker_position (w
->start
));
3352 if (! NILP (Vwindow_configuration_change_hook
)
3353 && ! NILP (Vrun_hooks
))
3354 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3357 unbind_to (count
, Qnil
);
3361 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 3, 0,
3362 doc
: /* Make WINDOW display BUFFER as its contents.
3363 BUFFER can be a buffer or the name of an existing buffer.
3364 Optional third arg KEEP-MARGINS non-nil means that WINDOW's current
3365 display margins, fringe widths, and scroll bar settings are maintained;
3366 the default is to reset these from BUFFER's local settings or the frame
3369 This function runs the hook `window-scroll-functions'. */)
3370 (window
, buffer
, keep_margins
)
3371 register Lisp_Object window
, buffer
, keep_margins
;
3373 register Lisp_Object tem
;
3374 register struct window
*w
= decode_window (window
);
3376 XSETWINDOW (window
, w
);
3377 buffer
= Fget_buffer (buffer
);
3378 CHECK_BUFFER (buffer
);
3380 if (NILP (XBUFFER (buffer
)->name
))
3381 error ("Attempt to display deleted buffer");
3385 error ("Window is deleted");
3386 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
3387 is first being set up. */
3389 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
3390 error ("Window is dedicated to `%s'",
3391 SDATA (XBUFFER (tem
)->name
));
3396 set_window_buffer (window
, buffer
, 1, !NILP (keep_margins
));
3400 /* Note that selected_window can be nil
3401 when this is called from Fset_window_configuration. */
3403 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 2, 0,
3404 doc
: /* Select WINDOW. Most editing will apply to WINDOW's buffer.
3405 If WINDOW is not already selected, make WINDOW's buffer current
3406 and make WINDOW the frame's selected window. Return WINDOW.
3407 Optional second arg NORECORD non-nil means
3408 do not put this buffer at the front of the list of recently selected ones.
3410 Note that the main editor command loop
3411 selects the buffer of the selected window before each command. */)
3413 register Lisp_Object window
, norecord
;
3415 register struct window
*w
;
3416 register struct window
*ow
;
3419 CHECK_LIVE_WINDOW (window
);
3421 w
= XWINDOW (window
);
3422 w
->frozen_window_start_p
= 0;
3424 ++window_select_count
;
3425 XSETFASTINT (w
->use_time
, window_select_count
);
3426 if (EQ (window
, selected_window
))
3429 /* Store the current buffer's actual point into the
3430 old selected window. It belongs to that window,
3431 and when the window is not selected, must be in the window. */
3432 if (!NILP (selected_window
))
3434 ow
= XWINDOW (selected_window
);
3435 if (! NILP (ow
->buffer
))
3436 set_marker_both (ow
->pointm
, ow
->buffer
,
3437 BUF_PT (XBUFFER (ow
->buffer
)),
3438 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
3441 selected_window
= window
;
3442 sf
= SELECTED_FRAME ();
3443 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
3445 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
3446 /* Use this rather than Fhandle_switch_frame
3447 so that FRAME_FOCUS_FRAME is moved appropriately as we
3448 move around in the state where a minibuffer in a separate
3450 Fselect_frame (WINDOW_FRAME (w
));
3453 sf
->selected_window
= window
;
3455 if (NILP (norecord
))
3456 record_buffer (w
->buffer
);
3457 Fset_buffer (w
->buffer
);
3459 XBUFFER (w
->buffer
)->last_selected_window
= window
;
3461 /* Go to the point recorded in the window.
3462 This is important when the buffer is in more
3463 than one window. It also matters when
3464 redisplay_window has altered point after scrolling,
3465 because it makes the change only in the window. */
3467 register int new_point
= marker_position (w
->pointm
);
3468 if (new_point
< BEGV
)
3470 else if (new_point
> ZV
)
3476 windows_or_buffers_changed
++;
3481 select_window_norecord (window
)
3484 return Fselect_window (window
, Qt
);
3487 /* Deiconify the frame containing the window WINDOW,
3488 unless it is the selected frame;
3491 The reason for the exception for the selected frame
3492 is that it seems better not to change the selected frames visibility
3493 merely because of displaying a different buffer in it.
3494 The deiconification is useful when a buffer gets shown in
3495 another frame that you were not using lately. */
3498 display_buffer_1 (window
)
3501 Lisp_Object frame
= XWINDOW (window
)->frame
;
3502 FRAME_PTR f
= XFRAME (frame
);
3504 FRAME_SAMPLE_VISIBILITY (f
);
3506 if (EQ (frame
, selected_frame
))
3507 ; /* Assume the selected frame is already visible enough. */
3508 else if (minibuf_level
> 0
3509 && MINI_WINDOW_P (XWINDOW (selected_window
))
3510 && WINDOW_LIVE_P (minibuf_selected_window
)
3511 && EQ (frame
, WINDOW_FRAME (XWINDOW (minibuf_selected_window
))))
3512 ; /* Assume the frame from which we invoked the minibuffer is visible. */
3515 if (FRAME_ICONIFIED_P (f
))
3516 Fmake_frame_visible (frame
);
3517 else if (FRAME_VISIBLE_P (f
))
3518 Fraise_frame (frame
);
3524 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
3525 doc
: /* Returns non-nil if a buffer named BUFFER-NAME gets a special frame.
3526 If the value is t, `display-buffer' or `pop-to-buffer' would create a
3527 special frame for that buffer using the default frame parameters.
3529 If the value is a list, it is a list of frame parameters that would be used
3530 to make a frame for that buffer.
3531 The variables `special-display-buffer-names'
3532 and `special-display-regexps' control this. */)
3534 Lisp_Object buffer_name
;
3538 CHECK_STRING (buffer_name
);
3540 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
3544 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
3548 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3550 Lisp_Object car
= XCAR (tem
);
3552 && fast_string_match (car
, buffer_name
) >= 0)
3554 else if (CONSP (car
)
3555 && STRINGP (XCAR (car
))
3556 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3562 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
3563 doc
: /* Returns non-nil if a buffer named BUFFER-NAME would use the same window.
3564 More precisely, if `display-buffer' or `pop-to-buffer' would display
3565 that buffer in the selected window rather than (as usual) in some other window.
3566 See `same-window-buffer-names' and `same-window-regexps'. */)
3568 Lisp_Object buffer_name
;
3572 CHECK_STRING (buffer_name
);
3574 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
3578 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
3582 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3584 Lisp_Object car
= XCAR (tem
);
3586 && fast_string_match (car
, buffer_name
) >= 0)
3588 else if (CONSP (car
)
3589 && STRINGP (XCAR (car
))
3590 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3596 /* Use B so the default is (other-buffer). */
3597 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
3598 "BDisplay buffer: \nP",
3599 doc
: /* Make BUFFER appear in some window but don't select it.
3600 BUFFER must be the name of an existing buffer, or, when called from Lisp,
3602 If BUFFER is shown already in some window, just use that one,
3603 unless the window is the selected window and the optional second
3604 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).
3605 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.
3606 Returns the window displaying BUFFER.
3607 If `display-buffer-reuse-frames' is non-nil, and another frame is currently
3608 displaying BUFFER, then simply raise that frame.
3610 The variables `special-display-buffer-names',
3611 `special-display-regexps', `same-window-buffer-names', and
3612 `same-window-regexps' customize how certain buffer names are handled.
3613 The latter two take effect only if NOT-THIS-WINDOW is nil.
3615 If optional argument FRAME is `visible', search all visible frames.
3616 If FRAME is 0, search all visible and iconified frames.
3617 If FRAME is t, search all frames.
3618 If FRAME is a frame, search only that frame.
3619 If FRAME is nil, search only the selected frame
3620 (actually the last nonminibuffer frame),
3621 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,
3622 which means search visible and iconified frames.
3624 If a full-width window on a splittable frame is available to display
3625 the buffer, it may be split, subject to the value of the variable
3626 `split-height-threshold'.
3628 If `even-window-heights' is non-nil, window heights will be evened out
3629 if displaying the buffer causes two vertically adjacent windows to be
3631 (buffer
, not_this_window
, frame
)
3632 register Lisp_Object buffer
, not_this_window
, frame
;
3634 register Lisp_Object window
, tem
, swp
;
3638 buffer
= Fget_buffer (buffer
);
3639 CHECK_BUFFER (buffer
);
3641 if (!NILP (Vdisplay_buffer_function
))
3642 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
3644 if (NILP (not_this_window
)
3645 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
3646 return display_buffer_1 (selected_window
);
3648 /* See if the user has specified this buffer should appear
3649 in the selected window. */
3650 if (NILP (not_this_window
))
3652 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
3653 if (!NILP (swp
) && !no_switch_window (selected_window
))
3655 Fswitch_to_buffer (buffer
, Qnil
);
3656 return display_buffer_1 (selected_window
);
3660 /* If the user wants pop-up-frames or display-buffer-reuse-frames,
3661 look for a window showing BUFFER on any visible or iconified frame.
3662 Otherwise search only the current frame. */
3665 else if (pop_up_frames
3666 || display_buffer_reuse_frames
3667 || last_nonminibuf_frame
== 0)
3668 XSETFASTINT (tem
, 0);
3670 XSETFRAME (tem
, last_nonminibuf_frame
);
3672 window
= Fget_buffer_window (buffer
, tem
);
3674 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
3675 return display_buffer_1 (window
);
3677 /* Certain buffer names get special handling. */
3678 if (!NILP (Vspecial_display_function
) && NILP (swp
))
3680 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
3682 return call1 (Vspecial_display_function
, buffer
);
3684 return call2 (Vspecial_display_function
, buffer
, tem
);
3687 /* If there are no frames open that have more than a minibuffer,
3688 we need to create a new frame. */
3689 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
3691 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3692 Fset_window_buffer (window
, buffer
, Qnil
);
3693 return display_buffer_1 (window
);
3696 f
= SELECTED_FRAME ();
3698 || FRAME_MINIBUF_ONLY_P (f
)
3699 /* If the current frame is a special display frame,
3700 don't try to reuse its windows. */
3701 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
3706 if (FRAME_MINIBUF_ONLY_P (f
))
3707 XSETFRAME (frames
, last_nonminibuf_frame
);
3708 /* Don't try to create a window if we would get an error. */
3709 if (split_height_threshold
< window_min_height
<< 1)
3710 split_height_threshold
= window_min_height
<< 1;
3712 /* Note that both Fget_largest_window and Fget_lru_window
3713 ignore minibuffers and dedicated windows.
3714 This means they can return nil. */
3716 /* If the frame we would try to split cannot be split,
3717 try other frames. */
3718 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
3720 /* Try visible frames first. */
3721 window
= Fget_largest_window (Qvisible
, Qt
);
3722 /* If that didn't work, try iconified frames. */
3724 window
= Fget_largest_window (make_number (0), Qt
);
3725 #if 0 /* Don't try windows on other displays. */
3727 window
= Fget_largest_window (Qt
, Qt
);
3731 window
= Fget_largest_window (frames
, Qt
);
3733 /* If we got a tall enough full-width window that can be split,
3736 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3737 && window_height (window
) >= split_height_threshold
3738 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
3739 window
= Fsplit_window (window
, Qnil
, Qnil
);
3742 Lisp_Object upper
, lower
, other
;
3744 window
= Fget_lru_window (frames
, Qt
);
3745 /* If the LRU window is selected, and big enough,
3746 and can be split, split it. */
3748 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3749 && (EQ (window
, selected_window
)
3750 || EQ (XWINDOW (window
)->parent
, Qnil
))
3751 && window_height (window
) >= window_min_height
<< 1)
3752 window
= Fsplit_window (window
, Qnil
, Qnil
);
3754 window
= Fget_lru_window (frames
, Qnil
);
3755 /* If Fget_lru_window returned nil, try other approaches. */
3757 /* Try visible frames first. */
3759 window
= Fget_buffer_window (buffer
, Qvisible
);
3761 window
= Fget_largest_window (Qvisible
, Qnil
);
3762 /* If that didn't work, try iconified frames. */
3764 window
= Fget_buffer_window (buffer
, make_number (0));
3766 window
= Fget_largest_window (make_number (0), Qnil
);
3768 #if 0 /* Don't try frames on other displays. */
3770 window
= Fget_buffer_window (buffer
, Qt
);
3772 window
= Fget_largest_window (Qt
, Qnil
);
3774 /* As a last resort, make a new frame. */
3776 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3777 /* If window appears above or below another,
3778 even out their heights. */
3779 other
= upper
= lower
= Qnil
;
3780 if (!NILP (XWINDOW (window
)->prev
))
3781 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3782 if (!NILP (XWINDOW (window
)->next
))
3783 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3785 && !NILP (Veven_window_heights
)
3786 /* Check that OTHER and WINDOW are vertically arrayed. */
3787 && !EQ (XWINDOW (other
)->top_line
, XWINDOW (window
)->top_line
)
3788 && (XFASTINT (XWINDOW (other
)->total_lines
)
3789 > XFASTINT (XWINDOW (window
)->total_lines
)))
3791 int total
= (XFASTINT (XWINDOW (other
)->total_lines
)
3792 + XFASTINT (XWINDOW (window
)->total_lines
));
3793 enlarge_window (upper
,
3794 total
/ 2 - XFASTINT (XWINDOW (upper
)->total_lines
),
3800 window
= Fget_lru_window (Qnil
, Qnil
);
3802 Fset_window_buffer (window
, buffer
, Qnil
);
3803 return display_buffer_1 (window
);
3807 DEFUN ("force-window-update", Fforce_window_update
, Sforce_window_update
,
3809 doc
: /* Force all windows to be updated on next redisplay.
3810 If optional arg OBJECT is a window, force redisplay of that window only.
3811 If OBJECT is a buffer or buffer name, force redisplay of all windows
3812 displaying that buffer. */)
3818 windows_or_buffers_changed
++;
3819 update_mode_lines
++;
3823 if (WINDOWP (object
))
3825 struct window
*w
= XWINDOW (object
);
3826 mark_window_display_accurate (object
, 0);
3827 w
->update_mode_line
= Qt
;
3828 if (BUFFERP (w
->buffer
))
3829 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
3830 ++update_mode_lines
;
3834 if (STRINGP (object
))
3835 object
= Fget_buffer (object
);
3836 if (BUFFERP (object
) && !NILP (XBUFFER (object
)->name
))
3838 /* Walk all windows looking for buffer, and force update
3839 of each of those windows. */
3841 object
= window_loop (REDISPLAY_BUFFER_WINDOWS
, object
, 0, Qvisible
);
3842 return NILP (object
) ? Qnil
: Qt
;
3845 /* If nothing suitable was found, just return.
3846 We could signal an error, but this feature will typically be used
3847 asynchronously in timers or process sentinels, so we don't. */
3853 temp_output_buffer_show (buf
)
3854 register Lisp_Object buf
;
3856 register struct buffer
*old
= current_buffer
;
3857 register Lisp_Object window
;
3858 register struct window
*w
;
3860 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3863 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3867 #if 0 /* rms: there should be no reason for this. */
3868 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3870 set_buffer_internal (old
);
3872 if (!NILP (Vtemp_buffer_show_function
))
3873 call1 (Vtemp_buffer_show_function
, buf
);
3876 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3878 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3879 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3880 Vminibuf_scroll_window
= window
;
3881 w
= XWINDOW (window
);
3882 XSETFASTINT (w
->hscroll
, 0);
3883 XSETFASTINT (w
->min_hscroll
, 0);
3884 set_marker_restricted_both (w
->start
, buf
, BEG
, BEG
);
3885 set_marker_restricted_both (w
->pointm
, buf
, BEG
, BEG
);
3887 /* Run temp-buffer-show-hook, with the chosen window selected
3888 and its buffer current. */
3890 if (!NILP (Vrun_hooks
)
3891 && !NILP (Fboundp (Qtemp_buffer_show_hook
))
3892 && !NILP (Fsymbol_value (Qtemp_buffer_show_hook
)))
3894 int count
= SPECPDL_INDEX ();
3895 Lisp_Object prev_window
, prev_buffer
;
3896 prev_window
= selected_window
;
3897 XSETBUFFER (prev_buffer
, old
);
3899 /* Select the window that was chosen, for running the hook.
3900 Note: Both Fselect_window and select_window_norecord may
3901 set-buffer to the buffer displayed in the window,
3902 so we need to save the current buffer. --stef */
3903 record_unwind_protect (Fset_buffer
, prev_buffer
);
3904 record_unwind_protect (select_window_norecord
, prev_window
);
3905 Fselect_window (window
, Qt
);
3906 Fset_buffer (w
->buffer
);
3907 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3908 unbind_to (count
, Qnil
);
3914 make_dummy_parent (window
)
3918 register struct window
*o
, *p
;
3921 o
= XWINDOW (window
);
3922 p
= allocate_window ();
3923 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3924 ((struct Lisp_Vector
*) p
)->contents
[i
]
3925 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3926 XSETWINDOW (new, p
);
3929 XSETFASTINT (p
->sequence_number
, sequence_number
);
3931 /* Put new into window structure in place of window */
3932 replace_window (window
, new);
3945 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3946 doc
: /* Split WINDOW, putting SIZE lines in the first of the pair.
3947 WINDOW defaults to selected one and SIZE to half its size.
3948 If optional third arg HORFLAG is non-nil, split side by side
3949 and put SIZE columns in the first of the pair. In that case,
3950 SIZE includes that window's scroll bar, or the divider column to its right.
3951 Interactively, all arguments are nil.
3953 Returns the newly created window (which is the lower or rightmost one).
3954 The upper or leftmost window is the original one, and remains selected
3955 if it was selected before.
3957 See Info node `(elisp)Splitting Windows' for more details and examples.*/)
3958 (window
, size
, horflag
)
3959 Lisp_Object window
, size
, horflag
;
3961 register Lisp_Object
new;
3962 register struct window
*o
, *p
;
3964 register int size_int
;
3967 window
= selected_window
;
3969 CHECK_LIVE_WINDOW (window
);
3971 o
= XWINDOW (window
);
3972 fo
= XFRAME (WINDOW_FRAME (o
));
3976 if (!NILP (horflag
))
3977 /* Calculate the size of the left-hand window, by dividing
3978 the usable space in columns by two.
3979 We round up, since the left-hand window may include
3980 a dividing line, while the right-hand may not. */
3981 size_int
= (XFASTINT (o
->total_cols
) + 1) >> 1;
3983 size_int
= XFASTINT (o
->total_lines
) >> 1;
3987 CHECK_NUMBER (size
);
3988 size_int
= XINT (size
);
3991 if (MINI_WINDOW_P (o
))
3992 error ("Attempt to split minibuffer window");
3993 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3994 error ("Attempt to split fixed-size window");
3996 check_min_window_sizes ();
4000 if (size_int
< window_min_height
)
4001 error ("Window height %d too small (after splitting)", size_int
);
4002 if (size_int
+ window_min_height
> XFASTINT (o
->total_lines
))
4003 error ("Window height %d too small (after splitting)",
4004 XFASTINT (o
->total_lines
) - size_int
);
4005 if (NILP (o
->parent
)
4006 || NILP (XWINDOW (o
->parent
)->vchild
))
4008 make_dummy_parent (window
);
4010 XWINDOW (new)->vchild
= window
;
4015 if (size_int
< window_min_width
)
4016 error ("Window width %d too small (after splitting)", size_int
);
4018 if (size_int
+ window_min_width
> XFASTINT (o
->total_cols
))
4019 error ("Window width %d too small (after splitting)",
4020 XFASTINT (o
->total_cols
) - size_int
);
4021 if (NILP (o
->parent
)
4022 || NILP (XWINDOW (o
->parent
)->hchild
))
4024 make_dummy_parent (window
);
4026 XWINDOW (new)->hchild
= window
;
4030 /* Now we know that window's parent is a vertical combination
4031 if we are dividing vertically, or a horizontal combination
4032 if we are making side-by-side windows */
4034 windows_or_buffers_changed
++;
4035 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
4036 new = make_window ();
4039 p
->frame
= o
->frame
;
4041 if (!NILP (p
->next
))
4042 XWINDOW (p
->next
)->prev
= new;
4045 p
->parent
= o
->parent
;
4047 p
->window_end_valid
= Qnil
;
4048 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
4050 /* Duplicate special geometry settings. */
4052 p
->left_margin_cols
= o
->left_margin_cols
;
4053 p
->right_margin_cols
= o
->right_margin_cols
;
4054 p
->left_fringe_width
= o
->left_fringe_width
;
4055 p
->right_fringe_width
= o
->right_fringe_width
;
4056 p
->fringes_outside_margins
= o
->fringes_outside_margins
;
4057 p
->scroll_bar_width
= o
->scroll_bar_width
;
4058 p
->vertical_scroll_bar_type
= o
->vertical_scroll_bar_type
;
4060 /* Apportion the available frame space among the two new windows */
4062 if (!NILP (horflag
))
4064 p
->total_lines
= o
->total_lines
;
4065 p
->top_line
= o
->top_line
;
4066 XSETFASTINT (p
->total_cols
, XFASTINT (o
->total_cols
) - size_int
);
4067 XSETFASTINT (o
->total_cols
, size_int
);
4068 XSETFASTINT (p
->left_col
, XFASTINT (o
->left_col
) + size_int
);
4069 adjust_window_margins (p
);
4070 adjust_window_margins (o
);
4074 p
->left_col
= o
->left_col
;
4075 p
->total_cols
= o
->total_cols
;
4076 XSETFASTINT (p
->total_lines
, XFASTINT (o
->total_lines
) - size_int
);
4077 XSETFASTINT (o
->total_lines
, size_int
);
4078 XSETFASTINT (p
->top_line
, XFASTINT (o
->top_line
) + size_int
);
4081 /* Adjust glyph matrices. */
4084 Fset_window_buffer (new, o
->buffer
, Qt
);
4088 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
4089 doc
: /* Make current window ARG lines bigger.
4090 From program, optional second arg non-nil means grow sideways ARG columns.
4091 Interactively, if an argument is not given, make the window one line bigger.
4092 If HORIZONTAL is non-nil, enlarge horizontally instead of vertically.
4093 This function can delete windows, even the second window, if they get
4096 Lisp_Object arg
, horizontal
;
4099 enlarge_window (selected_window
, XINT (arg
), !NILP (horizontal
));
4101 if (! NILP (Vwindow_configuration_change_hook
))
4102 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4107 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
4108 doc
: /* Make current window ARG lines smaller.
4109 From program, optional second arg non-nil means shrink sideways arg columns.
4110 Interactively, if an argument is not given, make the window one line smaller. Only
4111 siblings to the right or below are changed. */)
4113 Lisp_Object arg
, side
;
4116 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
4118 if (! NILP (Vwindow_configuration_change_hook
))
4119 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4125 window_height (window
)
4128 register struct window
*p
= XWINDOW (window
);
4129 return WINDOW_TOTAL_LINES (p
);
4133 window_width (window
)
4136 register struct window
*p
= XWINDOW (window
);
4137 return WINDOW_TOTAL_COLS (p
);
4142 *(horiz_flag ? &(XWINDOW (w)->left_col) : &(XWINDOW (w)->top_line))
4144 #define CURSIZE(w) \
4145 *(horiz_flag ? &(XWINDOW (w)->total_cols) : &(XWINDOW (w)->total_lines))
4148 /* Enlarge WINDOW by DELTA.
4149 HORIZ_FLAG nonzero means enlarge it horizontally;
4150 zero means do it vertically.
4152 Siblings of the selected window are resized to fulfill the size
4153 request. If they become too small in the process, they will be
4157 enlarge_window (window
, delta
, horiz_flag
)
4159 int delta
, horiz_flag
;
4161 Lisp_Object parent
, next
, prev
;
4165 int (*sizefun
) P_ ((Lisp_Object
))
4166 = horiz_flag
? window_width
: window_height
;
4167 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
4168 = (horiz_flag
? set_window_width
: set_window_height
);
4170 /* Check values of window_min_width and window_min_height for
4172 check_min_window_sizes ();
4174 /* Give up if this window cannot be resized. */
4175 if (window_fixed_size_p (XWINDOW (window
), horiz_flag
, 1))
4176 error ("Window is not resizable");
4178 /* Find the parent of the selected window. */
4181 p
= XWINDOW (window
);
4187 error ("No other window to side of this one");
4192 ? !NILP (XWINDOW (parent
)->hchild
)
4193 : !NILP (XWINDOW (parent
)->vchild
))
4199 sizep
= &CURSIZE (window
);
4202 register int maxdelta
;
4204 /* Compute the maximum size increment this window can have. */
4206 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
4207 /* This is a main window followed by a minibuffer. */
4208 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
4209 - window_min_size (XWINDOW (p
->next
),
4211 /* This is a minibuffer following a main window. */
4212 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
4213 - window_min_size (XWINDOW (p
->prev
),
4215 /* This is a frame with only one window, a minibuffer-only
4216 or a minibufferless frame. */
4219 if (delta
> maxdelta
)
4220 /* This case traps trying to make the minibuffer
4221 the full frame, or make the only window aside from the
4222 minibuffer the full frame. */
4226 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), horiz_flag
, 0, 0))
4228 delete_window (window
);
4235 /* Find the total we can get from other siblings without deleting them. */
4237 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
4238 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
4240 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
4241 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
4244 /* If we can get it all from them without deleting them, do so. */
4245 if (delta
<= maximum
)
4247 Lisp_Object first_unaffected
;
4248 Lisp_Object first_affected
;
4253 first_affected
= window
;
4254 /* Look at one sibling at a time,
4255 moving away from this window in both directions alternately,
4256 and take as much as we can get without deleting that sibling. */
4258 && (!NILP (next
) || !NILP (prev
)))
4262 int this_one
= ((*sizefun
) (next
)
4263 - window_min_size (XWINDOW (next
),
4264 horiz_flag
, 0, &fixed_p
));
4267 if (this_one
> delta
)
4270 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
4271 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4276 next
= XWINDOW (next
)->next
;
4284 int this_one
= ((*sizefun
) (prev
)
4285 - window_min_size (XWINDOW (prev
),
4286 horiz_flag
, 0, &fixed_p
));
4289 if (this_one
> delta
)
4292 first_affected
= prev
;
4294 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
4295 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4300 prev
= XWINDOW (prev
)->prev
;
4304 xassert (delta
== 0);
4306 /* Now recalculate the edge positions of all the windows affected,
4307 based on the new sizes. */
4308 first_unaffected
= next
;
4309 prev
= first_affected
;
4310 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
4311 prev
= next
, next
= XWINDOW (next
)->next
)
4313 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
4314 /* This does not change size of NEXT,
4315 but it propagates the new top edge to its children */
4316 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
4321 register int delta1
;
4322 register int opht
= (*sizefun
) (parent
);
4324 if (opht
<= XINT (*sizep
) + delta
)
4326 /* If trying to grow this window to or beyond size of the parent,
4327 just delete all the sibling windows. */
4328 Lisp_Object start
, tem
, next
;
4330 start
= XWINDOW (parent
)->vchild
;
4332 start
= XWINDOW (parent
)->hchild
;
4334 /* Delete any siblings that come after WINDOW. */
4335 tem
= XWINDOW (window
)->next
;
4336 while (! NILP (tem
))
4338 next
= XWINDOW (tem
)->next
;
4339 delete_window (tem
);
4343 /* Delete any siblings that come after WINDOW.
4344 Note that if START is not WINDOW, then WINDOW still
4345 Fhas siblings, so WINDOW has not yet replaced its parent. */
4347 while (! EQ (tem
, window
))
4349 next
= XWINDOW (tem
)->next
;
4350 delete_window (tem
);
4356 /* Otherwise, make delta1 just right so that if we add
4357 delta1 lines to this window and to the parent, and then
4358 shrink the parent back to its original size, the new
4359 proportional size of this window will increase by delta.
4361 The function size_window will compute the new height h'
4362 of the window from delta1 as:
4365 x = delta1 - delta1/n * n for the 1st resizable child
4368 where n is the number of children that can be resized.
4369 We can ignore x by choosing a delta1 that is a multiple of
4370 n. We want the height of this window to come out as
4380 The number of children n equals the number of resizable
4381 children of this window + 1 because we know window itself
4382 is resizable (otherwise we would have signalled an error). */
4384 struct window
*w
= XWINDOW (window
);
4388 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
4389 if (!window_fixed_size_p (XWINDOW (s
), horiz_flag
, 0))
4391 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
4392 if (!window_fixed_size_p (XWINDOW (s
), horiz_flag
, 0))
4397 /* Add delta1 lines or columns to this window, and to the parent,
4398 keeping things consistent while not affecting siblings. */
4399 XSETINT (CURSIZE (parent
), opht
+ delta1
);
4400 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
4402 /* Squeeze out delta1 lines or columns from our parent,
4403 shriking this window and siblings proportionately.
4404 This brings parent back to correct size.
4405 Delta1 was calculated so this makes this window the desired size,
4406 taking it all out of the siblings. */
4407 (*setsizefun
) (parent
, opht
, 0);
4412 XSETFASTINT (p
->last_modified
, 0);
4413 XSETFASTINT (p
->last_overlay_modified
, 0);
4415 /* Adjust glyph matrices. */
4416 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4420 /* Adjust the size of WINDOW by DELTA, moving only its trailing edge.
4421 HORIZ_FLAG nonzero means adjust the width, moving the right edge.
4422 zero means adjust the height, moving the bottom edge.
4424 Following siblings of the selected window are resized to fulfill
4425 the size request. If they become too small in the process, they
4426 are not deleted; instead, we signal an error. */
4429 adjust_window_trailing_edge (window
, delta
, horiz_flag
)
4431 int delta
, horiz_flag
;
4433 Lisp_Object parent
, child
;
4435 Lisp_Object old_config
= Fcurrent_window_configuration (Qnil
);
4436 int delcount
= window_deletion_count
;
4438 /* Check values of window_min_width and window_min_height for
4440 check_min_window_sizes ();
4443 window
= Fselected_window ();
4445 CHECK_WINDOW (window
);
4447 /* Give up if this window cannot be resized. */
4448 if (window_fixed_size_p (XWINDOW (window
), horiz_flag
, 1))
4449 error ("Window is not resizable");
4453 Lisp_Object first_parallel
= Qnil
;
4457 /* This happens if WINDOW on the previous iteration was
4458 at top level of the window tree. */
4459 Fset_window_configuration (old_config
);
4460 error ("Specified window edge is fixed");
4463 p
= XWINDOW (window
);
4466 /* See if this level has windows in parallel in the specified
4467 direction. If so, set FIRST_PARALLEL to the first one. */
4470 if (! NILP (parent
) && !NILP (XWINDOW (parent
)->vchild
))
4471 first_parallel
= XWINDOW (parent
)->vchild
;
4472 else if (NILP (parent
) && !NILP (p
->next
))
4474 /* Handle the vertical chain of main window and minibuffer
4475 which has no parent. */
4476 first_parallel
= window
;
4477 while (! NILP (XWINDOW (first_parallel
)->prev
))
4478 first_parallel
= XWINDOW (first_parallel
)->prev
;
4483 if (! NILP (parent
) && !NILP (XWINDOW (parent
)->hchild
))
4484 first_parallel
= XWINDOW (parent
)->hchild
;
4487 /* If this level's succession is in the desired dimension,
4488 and this window is the last one, and there is no higher level,
4489 its trailing edge is fixed. */
4490 if (NILP (XWINDOW (window
)->next
) && NILP (first_parallel
)
4493 Fset_window_configuration (old_config
);
4494 error ("Specified window edge is fixed");
4497 /* Don't make this window too small. */
4498 if (XINT (CURSIZE (window
)) + delta
4499 < (horiz_flag
? window_min_width
: window_min_height
))
4501 Fset_window_configuration (old_config
);
4502 error ("Cannot adjust window size as specified");
4505 /* Clear out some redisplay caches. */
4506 XSETFASTINT (p
->last_modified
, 0);
4507 XSETFASTINT (p
->last_overlay_modified
, 0);
4509 /* Adjust this window's edge. */
4510 XSETINT (CURSIZE (window
),
4511 XINT (CURSIZE (window
)) + delta
);
4513 /* If this window has following siblings in the desired dimension,
4514 make them smaller, and exit the loop.
4516 (If we reach the top of the tree and can never do this,
4517 we will fail and report an error, above.) */
4518 if (NILP (first_parallel
))
4520 if (!NILP (p
->next
))
4522 /* This may happen for the minibuffer. In that case
4523 the window_deletion_count check below does not work. */
4524 if (XINT (CURSIZE (p
->next
)) - delta
<= 0)
4526 Fset_window_configuration (old_config
);
4527 error ("Cannot adjust window size as specified");
4530 XSETINT (CURBEG (p
->next
),
4531 XINT (CURBEG (p
->next
)) + delta
);
4532 size_window (p
->next
, XINT (CURSIZE (p
->next
)) - delta
,
4533 horiz_flag
, 0, 1, 0);
4538 /* Here we have a chain of parallel siblings, in the other dimension.
4539 Change the size of the other siblings. */
4540 for (child
= first_parallel
;
4542 child
= XWINDOW (child
)->next
)
4543 if (! EQ (child
, window
))
4544 size_window (child
, XINT (CURSIZE (child
)) + delta
,
4545 horiz_flag
, 0, 0, 1);
4550 /* If we made a window so small it got deleted,
4551 we failed. Report failure. */
4552 if (delcount
!= window_deletion_count
)
4554 Fset_window_configuration (old_config
);
4555 error ("Cannot adjust window size as specified");
4558 /* Adjust glyph matrices. */
4559 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4565 DEFUN ("adjust-window-trailing-edge", Fadjust_window_trailing_edge
,
4566 Sadjust_window_trailing_edge
, 3, 3, 0,
4567 doc
: /* Adjust the bottom or right edge of WINDOW by DELTA.
4568 If HORIZONTAL is non-nil, that means adjust the width, moving the right edge.
4569 Otherwise, adjust the height, moving the bottom edge.
4571 Following siblings of the selected window are resized to fulfill
4572 the size request. If they become too small in the process, they
4573 are not deleted; instead, we signal an error. */)
4574 (window
, delta
, horizontal
)
4575 Lisp_Object window
, delta
, horizontal
;
4577 CHECK_NUMBER (delta
);
4578 adjust_window_trailing_edge (window
, XINT (delta
), !NILP (horizontal
));
4580 if (! NILP (Vwindow_configuration_change_hook
))
4581 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4588 /***********************************************************************
4589 Resizing Mini-Windows
4590 ***********************************************************************/
4592 static void shrink_window_lowest_first
P_ ((struct window
*, int));
4594 enum save_restore_action
4601 static int save_restore_orig_size
P_ ((struct window
*,
4602 enum save_restore_action
));
4604 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
4605 from lowest windows first. */
4608 shrink_window_lowest_first (w
, height
)
4616 xassert (!MINI_WINDOW_P (w
));
4618 /* Set redisplay hints. */
4619 XSETFASTINT (w
->last_modified
, 0);
4620 XSETFASTINT (w
->last_overlay_modified
, 0);
4621 windows_or_buffers_changed
++;
4622 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
4624 old_height
= XFASTINT (w
->total_lines
);
4625 XSETFASTINT (w
->total_lines
, height
);
4627 if (!NILP (w
->hchild
))
4629 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
4631 c
= XWINDOW (child
);
4632 c
->top_line
= w
->top_line
;
4633 shrink_window_lowest_first (c
, height
);
4636 else if (!NILP (w
->vchild
))
4638 Lisp_Object last_child
;
4639 int delta
= old_height
- height
;
4644 /* Find the last child. We are taking space from lowest windows
4645 first, so we iterate over children from the last child
4647 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
4650 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
4651 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
4655 c
= XWINDOW (child
);
4656 this_one
= XFASTINT (c
->total_lines
) - MIN_SAFE_WINDOW_HEIGHT
;
4658 if (this_one
> delta
)
4661 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
) - this_one
);
4665 /* Compute new positions. */
4666 last_top
= XINT (w
->top_line
);
4667 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
4669 c
= XWINDOW (child
);
4670 c
->top_line
= make_number (last_top
);
4671 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
));
4672 last_top
+= XFASTINT (c
->total_lines
);
4678 /* Save, restore, or check positions and sizes in the window tree
4679 rooted at W. ACTION says what to do.
4681 If ACTION is CHECK_ORIG_SIZES, check if orig_top_line and
4682 orig_total_lines members are valid for all windows in the window
4683 tree. Value is non-zero if they are valid.
4685 If ACTION is SAVE_ORIG_SIZES, save members top and height in
4686 orig_top_line and orig_total_lines for all windows in the tree.
4688 If ACTION is RESTORE_ORIG_SIZES, restore top and height from values
4689 stored in orig_top_line and orig_total_lines for all windows. */
4692 save_restore_orig_size (w
, action
)
4694 enum save_restore_action action
;
4700 if (!NILP (w
->hchild
))
4702 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
4705 else if (!NILP (w
->vchild
))
4707 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
4713 case CHECK_ORIG_SIZES
:
4714 if (!INTEGERP (w
->orig_top_line
) || !INTEGERP (w
->orig_total_lines
))
4718 case SAVE_ORIG_SIZES
:
4719 w
->orig_top_line
= w
->top_line
;
4720 w
->orig_total_lines
= w
->total_lines
;
4721 XSETFASTINT (w
->last_modified
, 0);
4722 XSETFASTINT (w
->last_overlay_modified
, 0);
4725 case RESTORE_ORIG_SIZES
:
4726 xassert (INTEGERP (w
->orig_top_line
) && INTEGERP (w
->orig_total_lines
));
4727 w
->top_line
= w
->orig_top_line
;
4728 w
->total_lines
= w
->orig_total_lines
;
4729 w
->orig_total_lines
= w
->orig_top_line
= Qnil
;
4730 XSETFASTINT (w
->last_modified
, 0);
4731 XSETFASTINT (w
->last_overlay_modified
, 0);
4738 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
4745 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
4746 without deleting other windows. */
4749 grow_mini_window (w
, delta
)
4753 struct frame
*f
= XFRAME (w
->frame
);
4754 struct window
*root
;
4756 xassert (MINI_WINDOW_P (w
));
4757 xassert (delta
>= 0);
4759 /* Check values of window_min_width and window_min_height for
4761 check_min_window_sizes ();
4763 /* Compute how much we can enlarge the mini-window without deleting
4765 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4768 int min_height
= window_min_size (root
, 0, 0, 0);
4769 if (XFASTINT (root
->total_lines
) - delta
< min_height
)
4770 /* Note that the root window may already be smaller than
4772 delta
= max (0, XFASTINT (root
->total_lines
) - min_height
);
4777 /* Save original window sizes and positions, if not already done. */
4778 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4779 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
4781 /* Shrink other windows. */
4782 shrink_window_lowest_first (root
, XFASTINT (root
->total_lines
) - delta
);
4784 /* Grow the mini-window. */
4785 w
->top_line
= make_number (XFASTINT (root
->top_line
) + XFASTINT (root
->total_lines
));
4786 w
->total_lines
= make_number (XFASTINT (w
->total_lines
) + delta
);
4787 XSETFASTINT (w
->last_modified
, 0);
4788 XSETFASTINT (w
->last_overlay_modified
, 0);
4795 /* Shrink mini-window W. If there is recorded info about window sizes
4796 before a call to grow_mini_window, restore recorded window sizes.
4797 Otherwise, if the mini-window is higher than 1 line, resize it to 1
4801 shrink_mini_window (w
)
4804 struct frame
*f
= XFRAME (w
->frame
);
4805 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4807 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4809 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
4811 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4812 windows_or_buffers_changed
= 1;
4814 else if (XFASTINT (w
->total_lines
) > 1)
4816 /* Distribute the additional lines of the mini-window
4817 among the other windows. */
4819 XSETWINDOW (window
, w
);
4820 enlarge_window (window
, 1 - XFASTINT (w
->total_lines
), 0);
4826 /* Mark window cursors off for all windows in the window tree rooted
4827 at W by setting their phys_cursor_on_p flag to zero. Called from
4828 xterm.c, e.g. when a frame is cleared and thereby all cursors on
4829 the frame are cleared. */
4832 mark_window_cursors_off (w
)
4837 if (!NILP (w
->hchild
))
4838 mark_window_cursors_off (XWINDOW (w
->hchild
));
4839 else if (!NILP (w
->vchild
))
4840 mark_window_cursors_off (XWINDOW (w
->vchild
));
4842 w
->phys_cursor_on_p
= 0;
4844 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4849 /* Return number of lines of text (not counting mode lines) in W. */
4852 window_internal_height (w
)
4855 int ht
= XFASTINT (w
->total_lines
);
4857 if (!MINI_WINDOW_P (w
))
4859 if (!NILP (w
->parent
)
4860 || !NILP (w
->vchild
)
4861 || !NILP (w
->hchild
)
4864 || WINDOW_WANTS_MODELINE_P (w
))
4867 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4875 /* Return the number of columns in W.
4876 Don't count columns occupied by scroll bars or the vertical bar
4877 separating W from the sibling to its right. */
4880 window_box_text_cols (w
)
4883 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4884 int width
= XINT (w
->total_cols
);
4886 if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w
))
4887 /* Scroll bars occupy a few columns. */
4888 width
-= WINDOW_CONFIG_SCROLL_BAR_COLS (w
);
4889 else if (!FRAME_WINDOW_P (f
)
4890 && !WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
4891 /* The column of `|' characters separating side-by-side windows
4892 occupies one column only. */
4895 if (FRAME_WINDOW_P (f
))
4896 /* On window-systems, fringes and display margins cannot be
4897 used for normal text. */
4898 width
-= (WINDOW_FRINGE_COLS (w
)
4899 + WINDOW_LEFT_MARGIN_COLS (w
)
4900 + WINDOW_RIGHT_MARGIN_COLS (w
));
4906 /************************************************************************
4908 ***********************************************************************/
4910 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
4911 N screen-fulls, which is defined as the height of the window minus
4912 next_screen_context_lines. If WHOLE is zero, scroll up N lines
4913 instead. Negative values of N mean scroll down. NOERROR non-zero
4914 means don't signal an error if we try to move over BEGV or ZV,
4918 window_scroll (window
, n
, whole
, noerror
)
4926 /* If we must, use the pixel-based version which is much slower than
4927 the line-based one but can handle varying line heights. */
4928 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
4929 window_scroll_pixel_based (window
, n
, whole
, noerror
);
4931 window_scroll_line_based (window
, n
, whole
, noerror
);
4937 /* Implementation of window_scroll that works based on pixel line
4938 heights. See the comment of window_scroll for parameter
4942 window_scroll_pixel_based (window
, n
, whole
, noerror
)
4949 struct window
*w
= XWINDOW (window
);
4950 struct text_pos start
;
4951 int this_scroll_margin
;
4952 /* True if we fiddled the window vscroll field without really scrolling. */
4954 int x
, y
, rtop
, rbot
, rowh
, vpos
;
4956 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4958 /* If PT is not visible in WINDOW, move back one half of
4959 the screen. Allow PT to be partially visible, otherwise
4960 something like (scroll-down 1) with PT in the line before
4961 the partially visible one would recenter. */
4963 if (!pos_visible_p (w
, PT
, &x
, &y
, &rtop
, &rbot
, &rowh
, &vpos
))
4965 /* Move backward half the height of the window. Performance note:
4966 vmotion used here is about 10% faster, but would give wrong
4967 results for variable height lines. */
4968 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4969 it
.current_y
= it
.last_visible_y
;
4970 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
4972 /* The function move_iterator_vertically may move over more than
4973 the specified y-distance. If it->w is small, e.g. a
4974 mini-buffer window, we may end up in front of the window's
4975 display area. This is the case when Start displaying at the
4976 start of the line containing PT in this case. */
4977 if (it
.current_y
<= 0)
4979 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4980 move_it_vertically_backward (&it
, 0);
4984 start
= it
.current
.pos
;
4986 else if (auto_window_vscroll_p
)
4988 if (rtop
|| rbot
) /* partially visible */
4991 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4993 dy
= max ((window_box_height (w
)
4994 - next_screen_context_lines
* dy
),
5000 /* Only vscroll backwards if already vscrolled forwards. */
5001 if (w
->vscroll
< 0 && rtop
> 0)
5003 px
= max (0, -w
->vscroll
- min (rtop
, -dy
));
5004 Fset_window_vscroll (window
, make_number (px
), Qt
);
5010 /* Do vscroll if already vscrolled or only display line. */
5011 if (rbot
> 0 && (w
->vscroll
< 0 || vpos
== 0))
5013 px
= max (0, -w
->vscroll
+ min (rbot
, dy
));
5014 Fset_window_vscroll (window
, make_number (px
), Qt
);
5018 /* Maybe modify window start instead of scrolling. */
5019 if (rbot
> 0 || w
->vscroll
< 0)
5023 Fset_window_vscroll (window
, make_number (0), Qt
);
5024 /* If there are other text lines above the current row,
5025 move window start to current row. Else to next row. */
5027 spos
= XINT (Fline_beginning_position (Qnil
));
5029 spos
= min (XINT (Fline_end_position (Qnil
)) + 1, ZV
);
5030 set_marker_restricted (w
->start
, make_number (spos
),
5032 w
->start_at_line_beg
= Qt
;
5033 w
->update_mode_line
= Qt
;
5034 XSETFASTINT (w
->last_modified
, 0);
5035 XSETFASTINT (w
->last_overlay_modified
, 0);
5036 /* Set force_start so that redisplay_window will run the
5037 window-scroll-functions. */
5038 w
->force_start
= Qt
;
5043 /* Cancel previous vscroll. */
5044 Fset_window_vscroll (window
, make_number (0), Qt
);
5047 /* If scroll_preserve_screen_position is non-nil, we try to set
5048 point in the same window line as it is now, so get that line. */
5049 if (!NILP (Vscroll_preserve_screen_position
))
5051 /* We preserve the goal pixel coordinate across consecutive
5052 calls to scroll-up or scroll-down. This avoids the
5053 possibility of point becoming "stuck" on a tall line when
5054 scrolling by one line. */
5055 if (window_scroll_pixel_based_preserve_y
< 0
5056 || (!EQ (current_kboard
->Vlast_command
, Qscroll_up
)
5057 && !EQ (current_kboard
->Vlast_command
, Qscroll_down
)))
5059 start_display (&it
, w
, start
);
5060 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
5061 window_scroll_pixel_based_preserve_y
= it
.current_y
;
5065 window_scroll_pixel_based_preserve_y
= -1;
5067 /* Move iterator it from start the specified distance forward or
5068 backward. The result is the new window start. */
5069 start_display (&it
, w
, start
);
5072 int start_pos
= IT_CHARPOS (it
);
5073 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
5074 dy
= max ((window_box_height (w
)
5075 - next_screen_context_lines
* dy
),
5078 /* Note that move_it_vertically always moves the iterator to the
5079 start of a line. So, if the last line doesn't have a newline,
5080 we would end up at the start of the line ending at ZV. */
5083 move_it_vertically_backward (&it
, -dy
);
5084 /* Ensure we actually do move, e.g. in case we are currently
5085 looking at an image that is taller that the window height. */
5086 while (start_pos
== IT_CHARPOS (it
)
5087 && start_pos
> BEGV
)
5088 move_it_by_lines (&it
, -1, 1);
5092 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
5093 MOVE_TO_POS
| MOVE_TO_Y
);
5094 /* Ensure we actually do move, e.g. in case we are currently
5095 looking at an image that is taller that the window height. */
5096 while (start_pos
== IT_CHARPOS (it
)
5098 move_it_by_lines (&it
, 1, 1);
5102 move_it_by_lines (&it
, n
, 1);
5104 /* We failed if we find ZV is already on the screen (scrolling up,
5105 means there's nothing past the end), or if we can't start any
5106 earlier (scrolling down, means there's nothing past the top). */
5107 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
5108 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
5110 if (IT_CHARPOS (it
) == ZV
)
5112 if (it
.current_y
< it
.last_visible_y
5113 && (it
.current_y
+ it
.max_ascent
+ it
.max_descent
5114 > it
.last_visible_y
))
5116 /* The last line was only partially visible, make it fully
5118 w
->vscroll
= (it
.last_visible_y
5119 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
5120 adjust_glyphs (it
.f
);
5124 else if (n
< 0) /* could happen with empty buffers */
5125 xsignal0 (Qbeginning_of_buffer
);
5127 xsignal0 (Qend_of_buffer
);
5131 if (w
->vscroll
!= 0)
5132 /* The first line was only partially visible, make it fully
5138 xsignal0 (Qbeginning_of_buffer
);
5141 /* If control gets here, then we vscrolled. */
5143 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5145 /* Don't try to change the window start below. */
5151 int pos
= IT_CHARPOS (it
);
5154 /* If in the middle of a multi-glyph character move forward to
5155 the next character. */
5156 if (in_display_vector_p (&it
))
5159 move_it_to (&it
, pos
, -1, -1, -1, MOVE_TO_POS
);
5162 /* Set the window start, and set up the window for redisplay. */
5163 set_marker_restricted (w
->start
, make_number (pos
),
5165 bytepos
= XMARKER (w
->start
)->bytepos
;
5166 w
->start_at_line_beg
= ((pos
== BEGV
|| FETCH_BYTE (bytepos
- 1) == '\n')
5168 w
->update_mode_line
= Qt
;
5169 XSETFASTINT (w
->last_modified
, 0);
5170 XSETFASTINT (w
->last_overlay_modified
, 0);
5171 /* Set force_start so that redisplay_window will run the
5172 window-scroll-functions. */
5173 w
->force_start
= Qt
;
5176 /* The rest of this function uses current_y in a nonstandard way,
5177 not including the height of the header line if any. */
5178 it
.current_y
= it
.vpos
= 0;
5180 /* Move PT out of scroll margins.
5181 This code wants current_y to be zero at the window start position
5182 even if there is a header line. */
5183 this_scroll_margin
= max (0, scroll_margin
);
5184 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->total_lines
) / 4);
5185 this_scroll_margin
*= FRAME_LINE_HEIGHT (it
.f
);
5189 /* We moved the window start towards ZV, so PT may be now
5190 in the scroll margin at the top. */
5191 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
5192 if (IT_CHARPOS (it
) == PT
&& it
.current_y
>= this_scroll_margin
5193 && (NILP (Vscroll_preserve_screen_position
)
5194 || EQ (Vscroll_preserve_screen_position
, Qt
)))
5195 /* We found PT at a legitimate height. Leave it alone. */
5197 else if (window_scroll_pixel_based_preserve_y
>= 0)
5199 /* If we have a header line, take account of it.
5200 This is necessary because we set it.current_y to 0, above. */
5201 move_it_to (&it
, -1, -1,
5202 window_scroll_pixel_based_preserve_y
5203 - (WINDOW_WANTS_HEADER_LINE_P (w
) ? 1 : 0 ),
5205 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5209 while (it
.current_y
< this_scroll_margin
)
5211 int prev
= it
.current_y
;
5212 move_it_by_lines (&it
, 1, 1);
5213 if (prev
== it
.current_y
)
5216 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5221 int charpos
, bytepos
;
5224 /* Save our position, for the
5225 window_scroll_pixel_based_preserve_y case. */
5226 charpos
= IT_CHARPOS (it
);
5227 bytepos
= IT_BYTEPOS (it
);
5229 /* We moved the window start towards BEGV, so PT may be now
5230 in the scroll margin at the bottom. */
5231 move_it_to (&it
, PT
, -1,
5232 (it
.last_visible_y
- CURRENT_HEADER_LINE_HEIGHT (w
)
5233 - this_scroll_margin
- 1),
5235 MOVE_TO_POS
| MOVE_TO_Y
);
5237 /* Save our position, in case it's correct. */
5238 charpos
= IT_CHARPOS (it
);
5239 bytepos
= IT_BYTEPOS (it
);
5241 /* See if point is on a partially visible line at the end. */
5242 if (it
.what
== IT_EOB
)
5243 partial_p
= it
.current_y
+ it
.ascent
+ it
.descent
> it
.last_visible_y
;
5246 move_it_by_lines (&it
, 1, 1);
5247 partial_p
= it
.current_y
> it
.last_visible_y
;
5250 if (charpos
== PT
&& !partial_p
5251 && (NILP (Vscroll_preserve_screen_position
)
5252 || EQ (Vscroll_preserve_screen_position
, Qt
)))
5253 /* We found PT before we found the display margin, so PT is ok. */
5255 else if (window_scroll_pixel_based_preserve_y
>= 0)
5257 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5258 start_display (&it
, w
, start
);
5259 /* It would be wrong to subtract CURRENT_HEADER_LINE_HEIGHT
5260 here because we called start_display again and did not
5261 alter it.current_y this time. */
5262 move_it_to (&it
, -1, -1, window_scroll_pixel_based_preserve_y
, -1,
5264 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5269 /* The last line was only partially visible, so back up two
5270 lines to make sure we're on a fully visible line. */
5272 move_it_by_lines (&it
, -2, 0);
5273 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5276 /* No, the position we saved is OK, so use it. */
5277 SET_PT_BOTH (charpos
, bytepos
);
5283 /* Implementation of window_scroll that works based on screen lines.
5284 See the comment of window_scroll for parameter descriptions. */
5287 window_scroll_line_based (window
, n
, whole
, noerror
)
5293 register struct window
*w
= XWINDOW (window
);
5294 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
5295 register int pos
, pos_byte
;
5296 register int ht
= window_internal_height (w
);
5297 register Lisp_Object tem
;
5301 struct position posit
;
5304 /* If scrolling screen-fulls, compute the number of lines to
5305 scroll from the window's height. */
5307 n
*= max (1, ht
- next_screen_context_lines
);
5309 startpos
= marker_position (w
->start
);
5311 posit
= *compute_motion (startpos
, 0, 0, 0,
5313 -1, XINT (w
->hscroll
),
5315 original_vpos
= posit
.vpos
;
5317 XSETFASTINT (tem
, PT
);
5318 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
5322 Fvertical_motion (make_number (- (ht
/ 2)), window
);
5327 lose
= n
< 0 && PT
== BEGV
;
5328 Fvertical_motion (make_number (n
), window
);
5332 SET_PT_BOTH (opoint
, opoint_byte
);
5339 xsignal0 (Qbeginning_of_buffer
);
5344 int this_scroll_margin
= scroll_margin
;
5346 /* Don't use a scroll margin that is negative or too large. */
5347 if (this_scroll_margin
< 0)
5348 this_scroll_margin
= 0;
5350 if (XINT (w
->total_lines
) < 4 * scroll_margin
)
5351 this_scroll_margin
= XINT (w
->total_lines
) / 4;
5353 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
5354 w
->start_at_line_beg
= bolp
;
5355 w
->update_mode_line
= Qt
;
5356 XSETFASTINT (w
->last_modified
, 0);
5357 XSETFASTINT (w
->last_overlay_modified
, 0);
5358 /* Set force_start so that redisplay_window will run
5359 the window-scroll-functions. */
5360 w
->force_start
= Qt
;
5362 if (!NILP (Vscroll_preserve_screen_position
)
5363 && (whole
|| !EQ (Vscroll_preserve_screen_position
, Qt
)))
5365 SET_PT_BOTH (pos
, pos_byte
);
5366 Fvertical_motion (make_number (original_vpos
), window
);
5368 /* If we scrolled forward, put point enough lines down
5369 that it is outside the scroll margin. */
5374 if (this_scroll_margin
> 0)
5376 SET_PT_BOTH (pos
, pos_byte
);
5377 Fvertical_motion (make_number (this_scroll_margin
), window
);
5383 if (top_margin
<= opoint
)
5384 SET_PT_BOTH (opoint
, opoint_byte
);
5385 else if (!NILP (Vscroll_preserve_screen_position
))
5387 SET_PT_BOTH (pos
, pos_byte
);
5388 Fvertical_motion (make_number (original_vpos
), window
);
5391 SET_PT (top_margin
);
5397 /* If we scrolled backward, put point near the end of the window
5398 but not within the scroll margin. */
5399 SET_PT_BOTH (pos
, pos_byte
);
5400 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
5401 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
5404 bottom_margin
= PT
+ 1;
5406 if (bottom_margin
> opoint
)
5407 SET_PT_BOTH (opoint
, opoint_byte
);
5410 if (!NILP (Vscroll_preserve_screen_position
))
5412 SET_PT_BOTH (pos
, pos_byte
);
5413 Fvertical_motion (make_number (original_vpos
), window
);
5416 Fvertical_motion (make_number (-1), window
);
5425 xsignal0 (Qend_of_buffer
);
5430 /* Scroll selected_window up or down. If N is nil, scroll a
5431 screen-full which is defined as the height of the window minus
5432 next_screen_context_lines. If N is the symbol `-', scroll.
5433 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
5434 up. This is the guts of Fscroll_up and Fscroll_down. */
5437 scroll_command (n
, direction
)
5441 int count
= SPECPDL_INDEX ();
5443 xassert (abs (direction
) == 1);
5445 /* If selected window's buffer isn't current, make it current for
5446 the moment. But don't screw up if window_scroll gets an error. */
5447 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
5449 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5450 Fset_buffer (XWINDOW (selected_window
)->buffer
);
5452 /* Make redisplay consider other windows than just selected_window. */
5453 ++windows_or_buffers_changed
;
5457 window_scroll (selected_window
, direction
, 1, 0);
5458 else if (EQ (n
, Qminus
))
5459 window_scroll (selected_window
, -direction
, 1, 0);
5462 n
= Fprefix_numeric_value (n
);
5463 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
5466 unbind_to (count
, Qnil
);
5469 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
5470 doc
: /* Scroll text of current window upward ARG lines.
5471 If ARG is omitted or nil, scroll upward by a near full screen.
5472 A near full screen is `next-screen-context-lines' less than a full screen.
5473 Negative ARG means scroll downward.
5474 If ARG is the atom `-', scroll downward by nearly full screen.
5475 When calling from a program, supply as argument a number, nil, or `-'. */)
5479 scroll_command (arg
, 1);
5483 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
5484 doc
: /* Scroll text of current window down ARG lines.
5485 If ARG is omitted or nil, scroll down by a near full screen.
5486 A near full screen is `next-screen-context-lines' less than a full screen.
5487 Negative ARG means scroll upward.
5488 If ARG is the atom `-', scroll upward by nearly full screen.
5489 When calling from a program, supply as argument a number, nil, or `-'. */)
5493 scroll_command (arg
, -1);
5497 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
5498 doc
: /* Return the other window for \"other window scroll\" commands.
5499 If `other-window-scroll-buffer' is non-nil, a window
5500 showing that buffer is used.
5501 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5502 specifies the window. This takes precedence over
5503 `other-window-scroll-buffer'. */)
5508 if (MINI_WINDOW_P (XWINDOW (selected_window
))
5509 && !NILP (Vminibuf_scroll_window
))
5510 window
= Vminibuf_scroll_window
;
5511 /* If buffer is specified, scroll that buffer. */
5512 else if (!NILP (Vother_window_scroll_buffer
))
5514 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
5516 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
5520 /* Nothing specified; look for a neighboring window on the same
5522 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
5524 if (EQ (window
, selected_window
))
5525 /* That didn't get us anywhere; look for a window on another
5528 window
= Fnext_window (window
, Qnil
, Qt
);
5529 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
5530 && ! EQ (window
, selected_window
));
5533 CHECK_LIVE_WINDOW (window
);
5535 if (EQ (window
, selected_window
))
5536 error ("There is no other window");
5541 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
5542 doc
: /* Scroll next window upward ARG lines; or near full screen if no ARG.
5543 A near full screen is `next-screen-context-lines' less than a full screen.
5544 The next window is the one below the current one; or the one at the top
5545 if the current one is at the bottom. Negative ARG means scroll downward.
5546 If ARG is the atom `-', scroll downward by nearly full screen.
5547 When calling from a program, supply as argument a number, nil, or `-'.
5549 If `other-window-scroll-buffer' is non-nil, scroll the window
5550 showing that buffer, popping the buffer up if necessary.
5551 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5552 specifies the window to scroll. This takes precedence over
5553 `other-window-scroll-buffer'. */)
5559 int count
= SPECPDL_INDEX ();
5561 window
= Fother_window_for_scrolling ();
5562 w
= XWINDOW (window
);
5564 /* Don't screw up if window_scroll gets an error. */
5565 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5566 ++windows_or_buffers_changed
;
5568 Fset_buffer (w
->buffer
);
5569 SET_PT (marker_position (w
->pointm
));
5572 window_scroll (window
, 1, 1, 1);
5573 else if (EQ (arg
, Qminus
))
5574 window_scroll (window
, -1, 1, 1);
5580 window_scroll (window
, XINT (arg
), 0, 1);
5583 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
5584 unbind_to (count
, Qnil
);
5589 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 2, "P\np",
5590 doc
: /* Scroll selected window display ARG columns left.
5591 Default for ARG is window width minus 2.
5592 Value is the total amount of leftward horizontal scrolling in
5593 effect after the change.
5594 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5595 lower bound for automatic scrolling, i.e. automatic scrolling
5596 will not scroll a window to a column less than the value returned
5597 by this function. This happens in an interactive call. */)
5599 register Lisp_Object arg
, set_minimum
;
5603 struct window
*w
= XWINDOW (selected_window
);
5606 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5608 arg
= Fprefix_numeric_value (arg
);
5610 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
5611 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5613 if (!NILP (set_minimum
))
5614 w
->min_hscroll
= w
->hscroll
;
5619 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 2, "P\np",
5620 doc
: /* Scroll selected window display ARG columns right.
5621 Default for ARG is window width minus 2.
5622 Value is the total amount of leftward horizontal scrolling in
5623 effect after the change.
5624 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5625 lower bound for automatic scrolling, i.e. automatic scrolling
5626 will not scroll a window to a column less than the value returned
5627 by this function. This happens in an interactive call. */)
5629 register Lisp_Object arg
, set_minimum
;
5633 struct window
*w
= XWINDOW (selected_window
);
5636 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5638 arg
= Fprefix_numeric_value (arg
);
5640 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
5641 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5643 if (!NILP (set_minimum
))
5644 w
->min_hscroll
= w
->hscroll
;
5649 DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window
, Sminibuffer_selected_window
, 0, 0, 0,
5650 doc
: /* Return the window which was selected when entering the minibuffer.
5651 Returns nil, if current window is not a minibuffer window. */)
5654 if (minibuf_level
> 0
5655 && MINI_WINDOW_P (XWINDOW (selected_window
))
5656 && WINDOW_LIVE_P (minibuf_selected_window
))
5657 return minibuf_selected_window
;
5662 /* Value is the number of lines actually displayed in window W,
5663 as opposed to its height. */
5666 displayed_window_lines (w
)
5670 struct text_pos start
;
5671 int height
= window_box_height (w
);
5672 struct buffer
*old_buffer
;
5675 if (XBUFFER (w
->buffer
) != current_buffer
)
5677 old_buffer
= current_buffer
;
5678 set_buffer_internal (XBUFFER (w
->buffer
));
5683 /* In case W->start is out of the accessible range, do something
5684 reasonable. This happens in Info mode when Info-scroll-down
5685 calls (recenter -1) while W->start is 1. */
5686 if (XMARKER (w
->start
)->charpos
< BEGV
)
5687 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
5688 else if (XMARKER (w
->start
)->charpos
> ZV
)
5689 SET_TEXT_POS (start
, ZV
, ZV_BYTE
);
5691 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5693 start_display (&it
, w
, start
);
5694 move_it_vertically (&it
, height
);
5695 bottom_y
= line_bottom_y (&it
);
5697 /* rms: On a non-window display,
5698 the value of it.vpos at the bottom of the screen
5699 seems to be 1 larger than window_box_height (w).
5700 This kludge fixes a bug whereby (move-to-window-line -1)
5701 when ZV is on the last screen line
5702 moves to the previous screen line instead of the last one. */
5703 if (! FRAME_WINDOW_P (XFRAME (w
->frame
)))
5706 /* Add in empty lines at the bottom of the window. */
5707 if (bottom_y
< height
)
5709 int uy
= FRAME_LINE_HEIGHT (it
.f
);
5710 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
5714 set_buffer_internal (old_buffer
);
5720 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
5721 doc
: /* Center point in window and redisplay frame.
5722 With prefix argument ARG, recenter putting point on screen line ARG
5723 relative to the current window. If ARG is negative, it counts up from the
5724 bottom of the window. (ARG should be less than the height of the window.)
5726 If ARG is omitted or nil, erase the entire frame and then redraw with point
5727 in the center of the current window. If `auto-resize-tool-bars' is set to
5728 `grow-only', this resets the tool-bar's height to the minimum height needed.
5730 Just C-u as prefix means put point in the center of the window
5731 and redisplay normally--don't erase and redraw the frame. */)
5733 register Lisp_Object arg
;
5735 struct window
*w
= XWINDOW (selected_window
);
5736 struct buffer
*buf
= XBUFFER (w
->buffer
);
5737 struct buffer
*obuf
= current_buffer
;
5739 int charpos
, bytepos
;
5741 int this_scroll_margin
;
5743 /* If redisplay is suppressed due to an error, try again. */
5744 obuf
->display_error_modiff
= 0;
5750 /* Invalidate pixel data calculated for all compositions. */
5751 for (i
= 0; i
< n_compositions
; i
++)
5752 composition_table
[i
]->font
= NULL
;
5754 WINDOW_XFRAME (w
)->minimize_tool_bar_window_p
= 1;
5756 Fredraw_frame (WINDOW_FRAME (w
));
5757 SET_FRAME_GARBAGED (WINDOW_XFRAME (w
));
5760 else if (CONSP (arg
)) /* Just C-u. */
5764 arg
= Fprefix_numeric_value (arg
);
5769 set_buffer_internal (buf
);
5771 /* Do this after making BUF current
5772 in case scroll_margin is buffer-local. */
5773 this_scroll_margin
= max (0, scroll_margin
);
5774 this_scroll_margin
= min (this_scroll_margin
,
5775 XFASTINT (w
->total_lines
) / 4);
5777 /* Handle centering on a graphical frame specially. Such frames can
5778 have variable-height lines and centering point on the basis of
5779 line counts would lead to strange effects. */
5780 if (FRAME_WINDOW_P (XFRAME (w
->frame
)))
5787 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5788 start_display (&it
, w
, pt
);
5789 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
5790 charpos
= IT_CHARPOS (it
);
5791 bytepos
= IT_BYTEPOS (it
);
5798 int extra_line_spacing
;
5799 int h
= window_box_height (w
);
5801 iarg
= - max (-iarg
, this_scroll_margin
);
5803 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5804 start_display (&it
, w
, pt
);
5806 /* Be sure we have the exact height of the full line containing PT. */
5807 move_it_by_lines (&it
, 0, 1);
5809 /* The amount of pixels we have to move back is the window
5810 height minus what's displayed in the line containing PT,
5811 and the lines below. */
5814 move_it_by_lines (&it
, nlines
, 1);
5816 if (it
.vpos
== nlines
)
5820 /* Last line has no newline */
5821 h
-= line_bottom_y (&it
);
5825 /* Don't reserve space for extra line spacing of last line. */
5826 extra_line_spacing
= it
.max_extra_line_spacing
;
5828 /* If we can't move down NLINES lines because we hit
5829 the end of the buffer, count in some empty lines. */
5830 if (it
.vpos
< nlines
)
5833 extra_line_spacing
= it
.extra_line_spacing
;
5834 h
-= nlines
* (FRAME_LINE_HEIGHT (it
.f
) + extra_line_spacing
);
5839 /* Now find the new top line (starting position) of the window. */
5840 start_display (&it
, w
, pt
);
5842 move_it_vertically_backward (&it
, h
);
5844 /* If extra line spacing is present, we may move too far
5845 back. This causes the last line to be only partially
5846 visible (which triggers redisplay to recenter that line
5847 in the middle), so move forward.
5848 But ignore extra line spacing on last line, as it is not
5849 considered to be part of the visible height of the line.
5851 h
+= extra_line_spacing
;
5852 while (-it
.current_y
> h
)
5853 move_it_by_lines (&it
, 1, 1);
5855 charpos
= IT_CHARPOS (it
);
5856 bytepos
= IT_BYTEPOS (it
);
5860 struct position pos
;
5862 iarg
= max (iarg
, this_scroll_margin
);
5864 pos
= *vmotion (PT
, -iarg
, w
);
5865 charpos
= pos
.bufpos
;
5866 bytepos
= pos
.bytepos
;
5871 struct position pos
;
5872 int ht
= window_internal_height (w
);
5879 /* Don't let it get into the margin at either top or bottom. */
5880 iarg
= max (iarg
, this_scroll_margin
);
5881 iarg
= min (iarg
, ht
- this_scroll_margin
- 1);
5883 pos
= *vmotion (PT
, - iarg
, w
);
5884 charpos
= pos
.bufpos
;
5885 bytepos
= pos
.bytepos
;
5888 /* Set the new window start. */
5889 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
5890 w
->window_end_valid
= Qnil
;
5892 w
->optional_new_start
= Qt
;
5894 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
5895 w
->start_at_line_beg
= Qt
;
5897 w
->start_at_line_beg
= Qnil
;
5899 set_buffer_internal (obuf
);
5904 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
5906 doc
: /* Return the height in lines of the text display area of WINDOW.
5907 WINDOW defaults to the selected window.
5908 This doesn't include the mode-line (or header-line if any) or any
5909 partial-height lines in the text display area. */)
5913 struct window
*w
= decode_window (window
);
5914 int pixel_height
= window_box_height (w
);
5915 int line_height
= pixel_height
/ FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
5916 return make_number (line_height
);
5921 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
5923 doc
: /* Position point relative to window.
5924 With no argument, position point at center of window.
5925 An argument specifies vertical position within the window;
5926 zero means top of window, negative means relative to bottom of window. */)
5930 struct window
*w
= XWINDOW (selected_window
);
5934 int this_scroll_margin
;
5937 window
= selected_window
;
5938 start
= marker_position (w
->start
);
5939 if (start
< BEGV
|| start
> ZV
)
5941 int height
= window_internal_height (w
);
5942 Fvertical_motion (make_number (- (height
/ 2)), window
);
5943 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
5944 w
->start_at_line_beg
= Fbolp ();
5945 w
->force_start
= Qt
;
5948 Fgoto_char (w
->start
);
5950 lines
= displayed_window_lines (w
);
5953 this_scroll_margin
= max (0, scroll_margin
);
5954 this_scroll_margin
= min (this_scroll_margin
, lines
/ 4);
5958 XSETFASTINT (arg
, lines
/ 2);
5961 int iarg
= XINT (Fprefix_numeric_value (arg
));
5964 iarg
= iarg
+ lines
;
5966 #if 0 /* This code would prevent move-to-window-line from moving point
5967 to a place inside the scroll margins (which would cause the
5968 next redisplay to scroll). I wrote this code, but then concluded
5969 it is probably better not to install it. However, it is here
5970 inside #if 0 so as not to lose it. -- rms. */
5972 /* Don't let it get into the margin at either top or bottom. */
5973 iarg
= max (iarg
, this_scroll_margin
);
5974 iarg
= min (iarg
, lines
- this_scroll_margin
- 1);
5977 arg
= make_number (iarg
);
5980 /* Skip past a partially visible first line. */
5982 XSETINT (arg
, XINT (arg
) + 1);
5984 return Fvertical_motion (arg
, window
);
5989 /***********************************************************************
5990 Window Configuration
5991 ***********************************************************************/
5993 struct save_window_data
5995 EMACS_INT size_from_Lisp_Vector_struct
;
5996 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
5997 Lisp_Object frame_cols
, frame_lines
, frame_menu_bar_lines
;
5998 Lisp_Object frame_tool_bar_lines
;
5999 Lisp_Object selected_frame
;
6000 Lisp_Object current_window
;
6001 Lisp_Object current_buffer
;
6002 Lisp_Object minibuf_scroll_window
;
6003 Lisp_Object minibuf_selected_window
;
6004 Lisp_Object root_window
;
6005 Lisp_Object focus_frame
;
6006 /* Record the values of window-min-width and window-min-height
6007 so that window sizes remain consistent with them. */
6008 Lisp_Object min_width
, min_height
;
6009 /* A vector, each of whose elements is a struct saved_window
6011 Lisp_Object saved_windows
;
6014 /* This is saved as a Lisp_Vector */
6017 /* these first two must agree with struct Lisp_Vector in lisp.h */
6018 EMACS_INT size_from_Lisp_Vector_struct
;
6019 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
6022 Lisp_Object buffer
, start
, pointm
, mark
;
6023 Lisp_Object left_col
, top_line
, total_cols
, total_lines
;
6024 Lisp_Object hscroll
, min_hscroll
;
6025 Lisp_Object parent
, prev
;
6026 Lisp_Object start_at_line_beg
;
6027 Lisp_Object display_table
;
6028 Lisp_Object orig_top_line
, orig_total_lines
;
6029 Lisp_Object left_margin_cols
, right_margin_cols
;
6030 Lisp_Object left_fringe_width
, right_fringe_width
, fringes_outside_margins
;
6031 Lisp_Object scroll_bar_width
, vertical_scroll_bar_type
;
6032 Lisp_Object dedicated
;
6035 #define SAVED_WINDOW_N(swv,n) \
6036 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
6038 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
6039 doc
: /* Return t if OBJECT is a window-configuration object. */)
6043 return WINDOW_CONFIGURATIONP (object
) ? Qt
: Qnil
;
6046 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
6047 doc
: /* Return the frame that CONFIG, a window-configuration object, is about. */)
6051 register struct save_window_data
*data
;
6052 struct Lisp_Vector
*saved_windows
;
6054 CHECK_WINDOW_CONFIGURATION (config
);
6056 data
= (struct save_window_data
*) XVECTOR (config
);
6057 saved_windows
= XVECTOR (data
->saved_windows
);
6058 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
6061 DEFUN ("set-window-configuration", Fset_window_configuration
,
6062 Sset_window_configuration
, 1, 1, 0,
6063 doc
: /* Set the configuration of windows and buffers as specified by CONFIGURATION.
6064 CONFIGURATION must be a value previously returned
6065 by `current-window-configuration' (which see).
6066 If CONFIGURATION was made from a frame that is now deleted,
6067 only frame-independent values can be restored. In this case,
6068 the return value is nil. Otherwise the value is t. */)
6070 Lisp_Object configuration
;
6072 register struct save_window_data
*data
;
6073 struct Lisp_Vector
*saved_windows
;
6074 Lisp_Object new_current_buffer
;
6079 CHECK_WINDOW_CONFIGURATION (configuration
);
6081 data
= (struct save_window_data
*) XVECTOR (configuration
);
6082 saved_windows
= XVECTOR (data
->saved_windows
);
6084 new_current_buffer
= data
->current_buffer
;
6085 if (NILP (XBUFFER (new_current_buffer
)->name
))
6086 new_current_buffer
= Qnil
;
6089 if (XBUFFER (new_current_buffer
) == current_buffer
)
6090 /* The code further down "preserves point" by saving here PT in
6091 old_point and then setting it later back into PT. When the
6092 current-selected-window and the final-selected-window both show
6093 the current buffer, this suffers from the problem that the
6094 current PT is the window-point of the current-selected-window,
6095 while the final PT is the point of the final-selected-window, so
6096 this copy from one PT to the other would end up moving the
6097 window-point of the final-selected-window to the window-point of
6098 the current-selected-window. So we have to be careful which
6099 point of the current-buffer we copy into old_point. */
6100 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
6101 && WINDOWP (selected_window
)
6102 && EQ (XWINDOW (selected_window
)->buffer
, new_current_buffer
)
6103 && !EQ (selected_window
, data
->current_window
))
6104 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
6108 /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of
6109 point in new_current_buffer as of the last time this buffer was
6110 used. This can be non-deterministic since it can be changed by
6111 things like jit-lock by mere temporary selection of some random
6112 window that happens to show this buffer.
6113 So if possible we want this arbitrary choice of "which point" to
6114 be the one from the to-be-selected-window so as to prevent this
6115 window's cursor from being copied from another window. */
6116 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
6117 /* If current_window = selected_window, its point is in BUF_PT. */
6118 && !EQ (selected_window
, data
->current_window
))
6119 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
6121 old_point
= BUF_PT (XBUFFER (new_current_buffer
));
6124 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
6127 /* If f is a dead frame, don't bother rebuilding its window tree.
6128 However, there is other stuff we should still try to do below. */
6129 if (FRAME_LIVE_P (f
))
6131 register struct window
*w
;
6132 register struct saved_window
*p
;
6133 struct window
*root_window
;
6134 struct window
**leaf_windows
;
6138 /* If the frame has been resized since this window configuration was
6139 made, we change the frame to the size specified in the
6140 configuration, restore the configuration, and then resize it
6141 back. We keep track of the prevailing height in these variables. */
6142 int previous_frame_lines
= FRAME_LINES (f
);
6143 int previous_frame_cols
= FRAME_COLS (f
);
6144 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
6145 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
6147 /* The mouse highlighting code could get screwed up
6148 if it runs during this. */
6151 if (XFASTINT (data
->frame_lines
) != previous_frame_lines
6152 || XFASTINT (data
->frame_cols
) != previous_frame_cols
)
6153 change_frame_size (f
, XFASTINT (data
->frame_lines
),
6154 XFASTINT (data
->frame_cols
), 0, 0, 0);
6155 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
6156 if (XFASTINT (data
->frame_menu_bar_lines
)
6157 != previous_frame_menu_bar_lines
)
6158 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
6159 #ifdef HAVE_WINDOW_SYSTEM
6160 if (XFASTINT (data
->frame_tool_bar_lines
)
6161 != previous_frame_tool_bar_lines
)
6162 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
6166 /* "Swap out" point from the selected window's buffer
6167 into the window itself. (Normally the pointm of the selected
6168 window holds garbage.) We do this now, before
6169 restoring the window contents, and prevent it from
6170 being done later on when we select a new window. */
6171 if (! NILP (XWINDOW (selected_window
)->buffer
))
6173 w
= XWINDOW (selected_window
);
6174 set_marker_both (w
->pointm
,
6176 BUF_PT (XBUFFER (w
->buffer
)),
6177 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6180 windows_or_buffers_changed
++;
6181 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
6183 /* Problem: Freeing all matrices and later allocating them again
6184 is a serious redisplay flickering problem. What we would
6185 really like to do is to free only those matrices not reused
6187 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
6189 = (struct window
**) alloca (count_windows (root_window
)
6190 * sizeof (struct window
*));
6191 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
6193 /* Temporarily avoid any problems with windows that are smaller
6194 than they are supposed to be. */
6195 window_min_height
= 1;
6196 window_min_width
= 1;
6199 Mark all windows now on frame as "deleted".
6200 Restoring the new configuration "undeletes" any that are in it.
6202 Save their current buffers in their height fields, since we may
6203 need it later, if a buffer saved in the configuration is now
6205 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6207 for (k
= 0; k
< saved_windows
->size
; k
++)
6209 p
= SAVED_WINDOW_N (saved_windows
, k
);
6210 w
= XWINDOW (p
->window
);
6213 if (!NILP (p
->parent
))
6214 w
->parent
= SAVED_WINDOW_N (saved_windows
,
6215 XFASTINT (p
->parent
))->window
;
6219 if (!NILP (p
->prev
))
6221 w
->prev
= SAVED_WINDOW_N (saved_windows
,
6222 XFASTINT (p
->prev
))->window
;
6223 XWINDOW (w
->prev
)->next
= p
->window
;
6228 if (!NILP (w
->parent
))
6230 if (EQ (p
->total_cols
, XWINDOW (w
->parent
)->total_cols
))
6232 XWINDOW (w
->parent
)->vchild
= p
->window
;
6233 XWINDOW (w
->parent
)->hchild
= Qnil
;
6237 XWINDOW (w
->parent
)->hchild
= p
->window
;
6238 XWINDOW (w
->parent
)->vchild
= Qnil
;
6243 /* If we squirreled away the buffer in the window's height,
6245 if (BUFFERP (w
->total_lines
))
6246 w
->buffer
= w
->total_lines
;
6247 w
->left_col
= p
->left_col
;
6248 w
->top_line
= p
->top_line
;
6249 w
->total_cols
= p
->total_cols
;
6250 w
->total_lines
= p
->total_lines
;
6251 w
->hscroll
= p
->hscroll
;
6252 w
->min_hscroll
= p
->min_hscroll
;
6253 w
->display_table
= p
->display_table
;
6254 w
->orig_top_line
= p
->orig_top_line
;
6255 w
->orig_total_lines
= p
->orig_total_lines
;
6256 w
->left_margin_cols
= p
->left_margin_cols
;
6257 w
->right_margin_cols
= p
->right_margin_cols
;
6258 w
->left_fringe_width
= p
->left_fringe_width
;
6259 w
->right_fringe_width
= p
->right_fringe_width
;
6260 w
->fringes_outside_margins
= p
->fringes_outside_margins
;
6261 w
->scroll_bar_width
= p
->scroll_bar_width
;
6262 w
->vertical_scroll_bar_type
= p
->vertical_scroll_bar_type
;
6263 w
->dedicated
= p
->dedicated
;
6264 XSETFASTINT (w
->last_modified
, 0);
6265 XSETFASTINT (w
->last_overlay_modified
, 0);
6267 /* Reinstall the saved buffer and pointers into it. */
6268 if (NILP (p
->buffer
))
6269 w
->buffer
= p
->buffer
;
6272 if (!NILP (XBUFFER (p
->buffer
)->name
))
6273 /* If saved buffer is alive, install it. */
6275 w
->buffer
= p
->buffer
;
6276 w
->start_at_line_beg
= p
->start_at_line_beg
;
6277 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
6278 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
6279 Fset_marker (XBUFFER (w
->buffer
)->mark
,
6280 p
->mark
, w
->buffer
);
6282 /* As documented in Fcurrent_window_configuration, don't
6283 restore the location of point in the buffer which was
6284 current when the window configuration was recorded. */
6285 if (!EQ (p
->buffer
, new_current_buffer
)
6286 && XBUFFER (p
->buffer
) == current_buffer
)
6287 Fgoto_char (w
->pointm
);
6289 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
6290 /* Else unless window has a live buffer, get one. */
6292 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
6293 /* This will set the markers to beginning of visible
6295 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
6296 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
6297 w
->start_at_line_beg
= Qt
;
6300 /* Keeping window's old buffer; make sure the markers
6303 /* Set window markers at start of visible range. */
6304 if (XMARKER (w
->start
)->buffer
== 0)
6305 set_marker_restricted (w
->start
, make_number (0),
6307 if (XMARKER (w
->pointm
)->buffer
== 0)
6308 set_marker_restricted_both (w
->pointm
, w
->buffer
,
6309 BUF_PT (XBUFFER (w
->buffer
)),
6310 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6311 w
->start_at_line_beg
= Qt
;
6316 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
6317 /* Prevent "swapping out point" in the old selected window
6318 using the buffer that has been restored into it.
6319 We already swapped out point that from that window's old buffer. */
6320 selected_window
= Qnil
;
6322 /* Arrange *not* to restore point in the buffer that was
6323 current when the window configuration was saved. */
6324 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
))
6325 set_marker_restricted (XWINDOW (data
->current_window
)->pointm
,
6326 make_number (old_point
),
6327 XWINDOW (data
->current_window
)->buffer
);
6329 Fselect_window (data
->current_window
, Qnil
);
6330 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
6333 if (NILP (data
->focus_frame
)
6334 || (FRAMEP (data
->focus_frame
)
6335 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
6336 Fredirect_frame_focus (frame
, data
->focus_frame
);
6338 #if 0 /* I don't understand why this is needed, and it causes problems
6339 when the frame's old selected window has been deleted. */
6340 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
6341 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
6345 /* Set the screen height to the value it had before this function. */
6346 if (previous_frame_lines
!= FRAME_LINES (f
)
6347 || previous_frame_cols
!= FRAME_COLS (f
))
6348 change_frame_size (f
, previous_frame_lines
, previous_frame_cols
,
6350 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
6351 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
6352 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
6354 #ifdef HAVE_WINDOW_SYSTEM
6355 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
6356 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
6361 /* Now, free glyph matrices in windows that were not reused. */
6362 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
6364 if (NILP (leaf_windows
[i
]->buffer
))
6366 /* Assert it's not reused as a combination. */
6367 xassert (NILP (leaf_windows
[i
]->hchild
)
6368 && NILP (leaf_windows
[i
]->vchild
));
6369 free_window_matrices (leaf_windows
[i
]);
6371 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
6379 /* Fselect_window will have made f the selected frame, so we
6380 reselect the proper frame here. Fhandle_switch_frame will change the
6381 selected window too, but that doesn't make the call to
6382 Fselect_window above totally superfluous; it still sets f's
6384 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
6385 do_switch_frame (data
->selected_frame
, 0, 0);
6387 if (! NILP (Vwindow_configuration_change_hook
)
6388 && ! NILP (Vrun_hooks
))
6389 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
6392 if (!NILP (new_current_buffer
))
6393 Fset_buffer (new_current_buffer
);
6395 /* Restore the minimum heights recorded in the configuration. */
6396 window_min_height
= XINT (data
->min_height
);
6397 window_min_width
= XINT (data
->min_width
);
6399 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
6400 minibuf_selected_window
= data
->minibuf_selected_window
;
6402 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
6405 /* Mark all windows now on frame as deleted
6406 by setting their buffers to nil. */
6409 delete_all_subwindows (w
)
6410 register struct window
*w
;
6412 if (!NILP (w
->next
))
6413 delete_all_subwindows (XWINDOW (w
->next
));
6414 if (!NILP (w
->vchild
))
6415 delete_all_subwindows (XWINDOW (w
->vchild
));
6416 if (!NILP (w
->hchild
))
6417 delete_all_subwindows (XWINDOW (w
->hchild
));
6419 w
->total_lines
= w
->buffer
; /* See Fset_window_configuration for excuse. */
6421 if (!NILP (w
->buffer
))
6424 /* We set all three of these fields to nil, to make sure that we can
6425 distinguish this dead window from any live window. Live leaf
6426 windows will have buffer set, and combination windows will have
6427 vchild or hchild set. */
6432 Vwindow_list
= Qnil
;
6436 count_windows (window
)
6437 register struct window
*window
;
6439 register int count
= 1;
6440 if (!NILP (window
->next
))
6441 count
+= count_windows (XWINDOW (window
->next
));
6442 if (!NILP (window
->vchild
))
6443 count
+= count_windows (XWINDOW (window
->vchild
));
6444 if (!NILP (window
->hchild
))
6445 count
+= count_windows (XWINDOW (window
->hchild
));
6450 /* Fill vector FLAT with leaf windows under W, starting at index I.
6451 Value is last index + 1. */
6454 get_leaf_windows (w
, flat
, i
)
6456 struct window
**flat
;
6461 if (!NILP (w
->hchild
))
6462 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
6463 else if (!NILP (w
->vchild
))
6464 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
6468 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6475 /* Return a pointer to the glyph W's physical cursor is on. Value is
6476 null if W's current matrix is invalid, so that no meaningfull glyph
6480 get_phys_cursor_glyph (w
)
6483 struct glyph_row
*row
;
6484 struct glyph
*glyph
;
6486 if (w
->phys_cursor
.vpos
>= 0
6487 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
6488 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
6490 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
6491 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
6500 save_window_save (window
, vector
, i
)
6502 struct Lisp_Vector
*vector
;
6505 register struct saved_window
*p
;
6506 register struct window
*w
;
6507 register Lisp_Object tem
;
6509 for (;!NILP (window
); window
= w
->next
)
6511 p
= SAVED_WINDOW_N (vector
, i
);
6512 w
= XWINDOW (window
);
6514 XSETFASTINT (w
->temslot
, i
); i
++;
6516 p
->buffer
= w
->buffer
;
6517 p
->left_col
= w
->left_col
;
6518 p
->top_line
= w
->top_line
;
6519 p
->total_cols
= w
->total_cols
;
6520 p
->total_lines
= w
->total_lines
;
6521 p
->hscroll
= w
->hscroll
;
6522 p
->min_hscroll
= w
->min_hscroll
;
6523 p
->display_table
= w
->display_table
;
6524 p
->orig_top_line
= w
->orig_top_line
;
6525 p
->orig_total_lines
= w
->orig_total_lines
;
6526 p
->left_margin_cols
= w
->left_margin_cols
;
6527 p
->right_margin_cols
= w
->right_margin_cols
;
6528 p
->left_fringe_width
= w
->left_fringe_width
;
6529 p
->right_fringe_width
= w
->right_fringe_width
;
6530 p
->fringes_outside_margins
= w
->fringes_outside_margins
;
6531 p
->scroll_bar_width
= w
->scroll_bar_width
;
6532 p
->vertical_scroll_bar_type
= w
->vertical_scroll_bar_type
;
6533 p
->dedicated
= w
->dedicated
;
6534 if (!NILP (w
->buffer
))
6536 /* Save w's value of point in the window configuration.
6537 If w is the selected window, then get the value of point
6538 from the buffer; pointm is garbage in the selected window. */
6539 if (EQ (window
, selected_window
))
6541 p
->pointm
= Fmake_marker ();
6542 set_marker_both (p
->pointm
, w
->buffer
,
6543 BUF_PT (XBUFFER (w
->buffer
)),
6544 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6547 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
6549 p
->start
= Fcopy_marker (w
->start
, Qnil
);
6550 p
->start_at_line_beg
= w
->start_at_line_beg
;
6552 tem
= XBUFFER (w
->buffer
)->mark
;
6553 p
->mark
= Fcopy_marker (tem
, Qnil
);
6560 p
->start_at_line_beg
= Qnil
;
6563 if (NILP (w
->parent
))
6566 p
->parent
= XWINDOW (w
->parent
)->temslot
;
6571 p
->prev
= XWINDOW (w
->prev
)->temslot
;
6573 if (!NILP (w
->vchild
))
6574 i
= save_window_save (w
->vchild
, vector
, i
);
6575 if (!NILP (w
->hchild
))
6576 i
= save_window_save (w
->hchild
, vector
, i
);
6582 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
6583 Scurrent_window_configuration
, 0, 1, 0,
6584 doc
: /* Return an object representing the current window configuration of FRAME.
6585 If FRAME is nil or omitted, use the selected frame.
6586 This describes the number of windows, their sizes and current buffers,
6587 and for each displayed buffer, where display starts, and the positions of
6588 point and mark. An exception is made for point in the current buffer:
6589 its value is -not- saved.
6590 This also records the currently selected frame, and FRAME's focus
6591 redirection (see `redirect-frame-focus'). */)
6595 register Lisp_Object tem
;
6596 register int n_windows
;
6597 register struct save_window_data
*data
;
6598 register struct Lisp_Vector
*vec
;
6603 frame
= selected_frame
;
6604 CHECK_LIVE_FRAME (frame
);
6607 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6608 vec
= allocate_other_vector (VECSIZE (struct save_window_data
));
6609 data
= (struct save_window_data
*)vec
;
6611 XSETFASTINT (data
->frame_cols
, FRAME_COLS (f
));
6612 XSETFASTINT (data
->frame_lines
, FRAME_LINES (f
));
6613 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
6614 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
6615 data
->selected_frame
= selected_frame
;
6616 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
6617 XSETBUFFER (data
->current_buffer
, current_buffer
);
6618 data
->minibuf_scroll_window
= minibuf_level
> 0 ? Vminibuf_scroll_window
: Qnil
;
6619 data
->minibuf_selected_window
= minibuf_level
> 0 ? minibuf_selected_window
: Qnil
;
6620 data
->root_window
= FRAME_ROOT_WINDOW (f
);
6621 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
6622 XSETINT (data
->min_height
, window_min_height
);
6623 XSETINT (data
->min_width
, window_min_width
);
6624 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
6625 data
->saved_windows
= tem
;
6626 for (i
= 0; i
< n_windows
; i
++)
6627 XVECTOR (tem
)->contents
[i
]
6628 = Fmake_vector (make_number (VECSIZE (struct saved_window
)), Qnil
);
6629 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
6630 XSETWINDOW_CONFIGURATION (tem
, data
);
6634 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
6636 doc
: /* Execute BODY, preserving window sizes and contents.
6637 Return the value of the last form in BODY.
6638 Restore which buffer appears in which window, where display starts,
6639 and the value of point and mark for each window.
6640 Also restore the choice of selected window.
6641 Also restore which buffer is current.
6642 Does not restore the value of point in current buffer.
6643 usage: (save-window-excursion BODY ...) */)
6647 register Lisp_Object val
;
6648 register int count
= SPECPDL_INDEX ();
6650 record_unwind_protect (Fset_window_configuration
,
6651 Fcurrent_window_configuration (Qnil
));
6652 val
= Fprogn (args
);
6653 return unbind_to (count
, val
);
6658 /***********************************************************************
6660 ***********************************************************************/
6666 Lisp_Object tail
= Qnil
;
6667 Lisp_Object result
= Qnil
;
6674 if (!NILP (w
->hchild
))
6675 wn
= Fcons (Qnil
, Fcons (Fwindow_edges (wn
),
6676 window_tree (XWINDOW (w
->hchild
))));
6677 else if (!NILP (w
->vchild
))
6678 wn
= Fcons (Qt
, Fcons (Fwindow_edges (wn
),
6679 window_tree (XWINDOW (w
->vchild
))));
6683 result
= tail
= Fcons (wn
, Qnil
);
6687 XSETCDR (tail
, Fcons (wn
, Qnil
));
6691 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6699 DEFUN ("window-tree", Fwindow_tree
, Swindow_tree
,
6701 doc
: /* Return the window tree for frame FRAME.
6703 The return value is a list of the form (ROOT MINI), where ROOT
6704 represents the window tree of the frame's root window, and MINI
6705 is the frame's minibuffer window.
6707 If the root window is not split, ROOT is the root window itself.
6708 Otherwise, ROOT is a list (DIR EDGES W1 W2 ...) where DIR is nil for a
6709 horizontal split, and t for a vertical split, EDGES gives the combined
6710 size and position of the subwindows in the split, and the rest of the
6711 elements are the subwindows in the split. Each of the subwindows may
6712 again be a window or a list representing a window split, and so on.
6713 EDGES is a list \(LEFT TOP RIGHT BOTTOM) as returned by `window-edges'.
6715 If FRAME is nil or omitted, return information on the currently
6723 frame
= selected_frame
;
6725 CHECK_FRAME (frame
);
6728 if (!FRAME_LIVE_P (f
))
6731 return window_tree (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6735 /***********************************************************************
6737 ***********************************************************************/
6739 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
6741 doc
: /* Set width of marginal areas of window WINDOW.
6742 If WINDOW is nil, set margins of the currently selected window.
6743 Second arg LEFT-WIDTH specifies the number of character cells to
6744 reserve for the left marginal area. Optional third arg RIGHT-WIDTH
6745 does the same for the right marginal area. A nil width parameter
6746 means no margin. */)
6747 (window
, left_width
, right_width
)
6748 Lisp_Object window
, left_width
, right_width
;
6750 struct window
*w
= decode_window (window
);
6752 /* Translate negative or zero widths to nil.
6753 Margins that are too wide have to be checked elsewhere. */
6755 if (!NILP (left_width
))
6757 CHECK_NUMBER (left_width
);
6758 if (XINT (left_width
) <= 0)
6762 if (!NILP (right_width
))
6764 CHECK_NUMBER (right_width
);
6765 if (XINT (right_width
) <= 0)
6769 if (!EQ (w
->left_margin_cols
, left_width
)
6770 || !EQ (w
->right_margin_cols
, right_width
))
6772 w
->left_margin_cols
= left_width
;
6773 w
->right_margin_cols
= right_width
;
6775 adjust_window_margins (w
);
6777 ++windows_or_buffers_changed
;
6778 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6785 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
6787 doc
: /* Get width of marginal areas of window WINDOW.
6788 If WINDOW is omitted or nil, use the currently selected window.
6789 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).
6790 If a marginal area does not exist, its width will be returned
6795 struct window
*w
= decode_window (window
);
6796 return Fcons (w
->left_margin_cols
, w
->right_margin_cols
);
6801 /***********************************************************************
6803 ***********************************************************************/
6805 DEFUN ("set-window-fringes", Fset_window_fringes
, Sset_window_fringes
,
6807 doc
: /* Set the fringe widths of window WINDOW.
6808 If WINDOW is nil, set the fringe widths of the currently selected
6810 Second arg LEFT-WIDTH specifies the number of pixels to reserve for
6811 the left fringe. Optional third arg RIGHT-WIDTH specifies the right
6812 fringe width. If a fringe width arg is nil, that means to use the
6813 frame's default fringe width. Default fringe widths can be set with
6814 the command `set-fringe-style'.
6815 If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes
6816 outside of the display margins. By default, fringes are drawn between
6817 display marginal areas and the text area. */)
6818 (window
, left_width
, right_width
, outside_margins
)
6819 Lisp_Object window
, left_width
, right_width
, outside_margins
;
6821 struct window
*w
= decode_window (window
);
6823 if (!NILP (left_width
))
6824 CHECK_NATNUM (left_width
);
6825 if (!NILP (right_width
))
6826 CHECK_NATNUM (right_width
);
6828 /* Do nothing on a tty. */
6829 if (FRAME_WINDOW_P (WINDOW_XFRAME (w
))
6830 && (!EQ (w
->left_fringe_width
, left_width
)
6831 || !EQ (w
->right_fringe_width
, right_width
)
6832 || !EQ (w
->fringes_outside_margins
, outside_margins
)))
6834 w
->left_fringe_width
= left_width
;
6835 w
->right_fringe_width
= right_width
;
6836 w
->fringes_outside_margins
= outside_margins
;
6838 adjust_window_margins (w
);
6840 clear_glyph_matrix (w
->current_matrix
);
6841 w
->window_end_valid
= Qnil
;
6843 ++windows_or_buffers_changed
;
6844 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6851 DEFUN ("window-fringes", Fwindow_fringes
, Swindow_fringes
,
6853 doc
: /* Get width of fringes of window WINDOW.
6854 If WINDOW is omitted or nil, use the currently selected window.
6855 Value is a list of the form (LEFT-WIDTH RIGHT-WIDTH OUTSIDE-MARGINS). */)
6859 struct window
*w
= decode_window (window
);
6861 return Fcons (make_number (WINDOW_LEFT_FRINGE_WIDTH (w
)),
6862 Fcons (make_number (WINDOW_RIGHT_FRINGE_WIDTH (w
)),
6863 Fcons ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6864 ? Qt
: Qnil
), Qnil
)));
6869 /***********************************************************************
6871 ***********************************************************************/
6873 DEFUN ("set-window-scroll-bars", Fset_window_scroll_bars
, Sset_window_scroll_bars
,
6875 doc
: /* Set width and type of scroll bars of window WINDOW.
6876 If window is nil, set scroll bars of the currently selected window.
6877 Second parameter WIDTH specifies the pixel width for the scroll bar;
6878 this is automatically adjusted to a multiple of the frame column width.
6879 Third parameter VERTICAL-TYPE specifies the type of the vertical scroll
6880 bar: left, right, or nil.
6881 If WIDTH is nil, use the frame's scroll-bar width.
6882 If VERTICAL-TYPE is t, use the frame's scroll-bar type.
6883 Fourth parameter HORIZONTAL-TYPE is currently unused. */)
6884 (window
, width
, vertical_type
, horizontal_type
)
6885 Lisp_Object window
, width
, vertical_type
, horizontal_type
;
6887 struct window
*w
= decode_window (window
);
6891 CHECK_NATNUM (width
);
6893 if (XINT (width
) == 0)
6894 vertical_type
= Qnil
;
6897 if (!(EQ (vertical_type
, Qnil
)
6898 || EQ (vertical_type
, Qleft
)
6899 || EQ (vertical_type
, Qright
)
6900 || EQ (vertical_type
, Qt
)))
6901 error ("Invalid type of vertical scroll bar");
6903 if (!EQ (w
->scroll_bar_width
, width
)
6904 || !EQ (w
->vertical_scroll_bar_type
, vertical_type
))
6906 w
->scroll_bar_width
= width
;
6907 w
->vertical_scroll_bar_type
= vertical_type
;
6909 adjust_window_margins (w
);
6911 clear_glyph_matrix (w
->current_matrix
);
6912 w
->window_end_valid
= Qnil
;
6914 ++windows_or_buffers_changed
;
6915 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6922 DEFUN ("window-scroll-bars", Fwindow_scroll_bars
, Swindow_scroll_bars
,
6924 doc
: /* Get width and type of scroll bars of window WINDOW.
6925 If WINDOW is omitted or nil, use the currently selected window.
6926 Value is a list of the form (WIDTH COLS VERTICAL-TYPE HORIZONTAL-TYPE).
6927 If WIDTH is nil or TYPE is t, the window is using the frame's corresponding
6932 struct window
*w
= decode_window (window
);
6933 return Fcons (make_number ((WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6934 ? WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6935 : WINDOW_SCROLL_BAR_AREA_WIDTH (w
))),
6936 Fcons (make_number (WINDOW_SCROLL_BAR_COLS (w
)),
6937 Fcons (w
->vertical_scroll_bar_type
,
6938 Fcons (Qnil
, Qnil
))));
6943 /***********************************************************************
6945 ***********************************************************************/
6947 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 2, 0,
6948 doc
: /* Return the amount by which WINDOW is scrolled vertically.
6949 Use the selected window if WINDOW is nil or omitted.
6950 Normally, value is a multiple of the canonical character height of WINDOW;
6951 optional second arg PIXELS-P means value is measured in pixels. */)
6953 Lisp_Object window
, pixels_p
;
6960 window
= selected_window
;
6962 CHECK_WINDOW (window
);
6963 w
= XWINDOW (window
);
6964 f
= XFRAME (w
->frame
);
6966 if (FRAME_WINDOW_P (f
))
6967 result
= (NILP (pixels_p
)
6968 ? FRAME_CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
)
6969 : make_number (-w
->vscroll
));
6971 result
= make_number (0);
6976 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
6978 doc
: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL.
6979 WINDOW nil means use the selected window. Normally, VSCROLL is a
6980 non-negative multiple of the canonical character height of WINDOW;
6981 optional third arg PIXELS-P non-nil means that VSCROLL is in pixels.
6982 If PIXELS-P is nil, VSCROLL may have to be rounded so that it
6983 corresponds to an integral number of pixels. The return value is the
6984 result of this rounding.
6985 If PIXELS-P is non-nil, the return value is VSCROLL. */)
6986 (window
, vscroll
, pixels_p
)
6987 Lisp_Object window
, vscroll
, pixels_p
;
6993 window
= selected_window
;
6995 CHECK_WINDOW (window
);
6996 CHECK_NUMBER_OR_FLOAT (vscroll
);
6998 w
= XWINDOW (window
);
6999 f
= XFRAME (w
->frame
);
7001 if (FRAME_WINDOW_P (f
))
7003 int old_dy
= w
->vscroll
;
7005 w
->vscroll
= - (NILP (pixels_p
)
7006 ? FRAME_LINE_HEIGHT (f
) * XFLOATINT (vscroll
)
7007 : XFLOATINT (vscroll
));
7008 w
->vscroll
= min (w
->vscroll
, 0);
7010 if (w
->vscroll
!= old_dy
)
7012 /* Adjust glyph matrix of the frame if the virtual display
7013 area becomes larger than before. */
7014 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
7017 /* Prevent redisplay shortcuts. */
7018 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
7022 return Fwindow_vscroll (window
, pixels_p
);
7026 /* Call FN for all leaf windows on frame F. FN is called with the
7027 first argument being a pointer to the leaf window, and with
7028 additional argument USER_DATA. Stops when FN returns 0. */
7031 foreach_window (f
, fn
, user_data
)
7033 int (* fn
) P_ ((struct window
*, void *));
7036 /* Fdelete_frame may set FRAME_ROOT_WINDOW (f) to Qnil. */
7037 if (WINDOWP (FRAME_ROOT_WINDOW (f
)))
7038 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
7042 /* Helper function for foreach_window. Call FN for all leaf windows
7043 reachable from W. FN is called with the first argument being a
7044 pointer to the leaf window, and with additional argument USER_DATA.
7045 Stop when FN returns 0. Value is 0 if stopped by FN. */
7048 foreach_window_1 (w
, fn
, user_data
)
7050 int (* fn
) P_ ((struct window
*, void *));
7055 for (cont
= 1; w
&& cont
;)
7057 if (!NILP (w
->hchild
))
7058 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
7059 else if (!NILP (w
->vchild
))
7060 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
7062 cont
= fn (w
, user_data
);
7064 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
7071 /* Freeze or unfreeze the window start of W unless it is a
7072 mini-window or the selected window. FREEZE_P non-null means freeze
7073 the window start. */
7076 freeze_window_start (w
, freeze_p
)
7080 if (w
== XWINDOW (selected_window
)
7081 || MINI_WINDOW_P (w
)
7082 || (MINI_WINDOW_P (XWINDOW (selected_window
))
7083 && ! NILP (Vminibuf_scroll_window
)
7084 && w
== XWINDOW (Vminibuf_scroll_window
)))
7087 w
->frozen_window_start_p
= freeze_p
!= NULL
;
7092 /* Freeze or unfreeze the window starts of all leaf windows on frame
7093 F, except the selected window and a mini-window. FREEZE_P non-zero
7094 means freeze the window start. */
7097 freeze_window_starts (f
, freeze_p
)
7101 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
7105 /***********************************************************************
7107 ***********************************************************************/
7109 /* Return 1 if window configurations C1 and C2
7110 describe the same state of affairs. This is used by Fequal. */
7113 compare_window_configurations (c1
, c2
, ignore_positions
)
7115 int ignore_positions
;
7117 register struct save_window_data
*d1
, *d2
;
7118 struct Lisp_Vector
*sw1
, *sw2
;
7121 CHECK_WINDOW_CONFIGURATION (c1
);
7122 CHECK_WINDOW_CONFIGURATION (c2
);
7124 d1
= (struct save_window_data
*) XVECTOR (c1
);
7125 d2
= (struct save_window_data
*) XVECTOR (c2
);
7126 sw1
= XVECTOR (d1
->saved_windows
);
7127 sw2
= XVECTOR (d2
->saved_windows
);
7129 if (! EQ (d1
->frame_cols
, d2
->frame_cols
))
7131 if (! EQ (d1
->frame_lines
, d2
->frame_lines
))
7133 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
7135 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
7137 /* Don't compare the current_window field directly.
7138 Instead see w1_is_current and w2_is_current, below. */
7139 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
7141 if (! ignore_positions
)
7143 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
7145 if (! EQ (d1
->minibuf_selected_window
, d2
->minibuf_selected_window
))
7148 /* Don't compare the root_window field.
7149 We don't require the two configurations
7150 to use the same window object,
7151 and the two root windows must be equivalent
7152 if everything else compares equal. */
7153 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
7155 if (! EQ (d1
->min_width
, d2
->min_width
))
7157 if (! EQ (d1
->min_height
, d2
->min_height
))
7160 /* Verify that the two confis have the same number of windows. */
7161 if (sw1
->size
!= sw2
->size
)
7164 for (i
= 0; i
< sw1
->size
; i
++)
7166 struct saved_window
*p1
, *p2
;
7167 int w1_is_current
, w2_is_current
;
7169 p1
= SAVED_WINDOW_N (sw1
, i
);
7170 p2
= SAVED_WINDOW_N (sw2
, i
);
7172 /* Verify that the current windows in the two
7173 configurations correspond to each other. */
7174 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
7175 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
7177 if (w1_is_current
!= w2_is_current
)
7180 /* Verify that the corresponding windows do match. */
7181 if (! EQ (p1
->buffer
, p2
->buffer
))
7183 if (! EQ (p1
->left_col
, p2
->left_col
))
7185 if (! EQ (p1
->top_line
, p2
->top_line
))
7187 if (! EQ (p1
->total_cols
, p2
->total_cols
))
7189 if (! EQ (p1
->total_lines
, p2
->total_lines
))
7191 if (! EQ (p1
->display_table
, p2
->display_table
))
7193 if (! EQ (p1
->parent
, p2
->parent
))
7195 if (! EQ (p1
->prev
, p2
->prev
))
7197 if (! ignore_positions
)
7199 if (! EQ (p1
->hscroll
, p2
->hscroll
))
7201 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
7203 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
7205 if (NILP (Fequal (p1
->start
, p2
->start
)))
7207 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
7209 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
7212 if (! EQ (p1
->left_margin_cols
, p2
->left_margin_cols
))
7214 if (! EQ (p1
->right_margin_cols
, p2
->right_margin_cols
))
7216 if (! EQ (p1
->left_fringe_width
, p2
->left_fringe_width
))
7218 if (! EQ (p1
->right_fringe_width
, p2
->right_fringe_width
))
7220 if (! EQ (p1
->fringes_outside_margins
, p2
->fringes_outside_margins
))
7222 if (! EQ (p1
->scroll_bar_width
, p2
->scroll_bar_width
))
7224 if (! EQ (p1
->vertical_scroll_bar_type
, p2
->vertical_scroll_bar_type
))
7231 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
7232 Scompare_window_configurations
, 2, 2, 0,
7233 doc
: /* Compare two window configurations as regards the structure of windows.
7234 This function ignores details such as the values of point and mark
7235 and scrolling positions. */)
7239 if (compare_window_configurations (x
, y
, 1))
7247 struct frame
*f
= make_terminal_frame ();
7248 XSETFRAME (selected_frame
, f
);
7249 Vterminal_frame
= selected_frame
;
7250 minibuf_window
= f
->minibuffer_window
;
7251 selected_window
= f
->selected_window
;
7252 last_nonminibuf_frame
= f
;
7254 window_initialized
= 1;
7260 Vwindow_list
= Qnil
;
7266 Qscroll_up
= intern ("scroll-up");
7267 staticpro (&Qscroll_up
);
7269 Qscroll_down
= intern ("scroll-down");
7270 staticpro (&Qscroll_down
);
7272 Qwindow_size_fixed
= intern ("window-size-fixed");
7273 staticpro (&Qwindow_size_fixed
);
7274 Fset (Qwindow_size_fixed
, Qnil
);
7276 staticpro (&Qwindow_configuration_change_hook
);
7277 Qwindow_configuration_change_hook
7278 = intern ("window-configuration-change-hook");
7280 Qwindowp
= intern ("windowp");
7281 staticpro (&Qwindowp
);
7283 Qwindow_configuration_p
= intern ("window-configuration-p");
7284 staticpro (&Qwindow_configuration_p
);
7286 Qwindow_live_p
= intern ("window-live-p");
7287 staticpro (&Qwindow_live_p
);
7289 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
7290 staticpro (&Qtemp_buffer_show_hook
);
7292 staticpro (&Vwindow_list
);
7294 minibuf_selected_window
= Qnil
;
7295 staticpro (&minibuf_selected_window
);
7297 window_scroll_pixel_based_preserve_y
= -1;
7299 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
7300 doc
: /* Non-nil means call as function to display a help buffer.
7301 The function is called with one argument, the buffer to be displayed.
7302 Used by `with-output-to-temp-buffer'.
7303 If this function is used, then it must do the entire job of showing
7304 the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */);
7305 Vtemp_buffer_show_function
= Qnil
;
7307 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
7308 doc
: /* If non-nil, function to call to handle `display-buffer'.
7309 It will receive two args, the buffer and a flag which if non-nil means
7310 that the currently selected window is not acceptable.
7311 It should choose or create a window, display the specified buffer in it,
7312 and return the window.
7313 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'
7314 work using this function. */);
7315 Vdisplay_buffer_function
= Qnil
;
7317 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
7318 doc
: /* *If non-nil, `display-buffer' should even the window heights.
7319 If nil, `display-buffer' will leave the window configuration alone. */);
7320 Veven_window_heights
= Qt
;
7322 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
7323 doc
: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */);
7324 Vminibuf_scroll_window
= Qnil
;
7326 DEFVAR_BOOL ("mode-line-in-non-selected-windows", &mode_line_in_non_selected_windows
,
7327 doc
: /* Non-nil means to use `mode-line-inactive' face in non-selected windows.
7328 If the minibuffer is active, the `minibuffer-scroll-window' mode line
7329 is displayed in the `mode-line' face. */);
7330 mode_line_in_non_selected_windows
= 1;
7332 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
7333 doc
: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */);
7334 Vother_window_scroll_buffer
= Qnil
;
7336 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
7337 doc
: /* *Non-nil means `display-buffer' should make a separate frame. */);
7340 DEFVAR_BOOL ("auto-window-vscroll", &auto_window_vscroll_p
,
7341 doc
: /* *Non-nil means to automatically adjust `window-vscroll' to view tall lines. */);
7342 auto_window_vscroll_p
= 1;
7344 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
7345 doc
: /* *Non-nil means `display-buffer' should reuse frames.
7346 If the buffer in question is already displayed in a frame, raise that frame. */);
7347 display_buffer_reuse_frames
= 0;
7349 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
7350 doc
: /* Function to call to handle automatic new frame creation.
7351 It is called with no arguments and should return a newly created frame.
7353 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'
7354 where `pop-up-frame-alist' would hold the default frame parameters. */);
7355 Vpop_up_frame_function
= Qnil
;
7357 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
7358 doc
: /* *List of buffer names that should have their own special frames.
7359 Displaying a buffer with `display-buffer' or `pop-to-buffer',
7360 if its name is in this list, makes a special frame for it
7361 using `special-display-function'. See also `special-display-regexps'.
7363 An element of the list can be a list instead of just a string.
7364 There are two ways to use a list as an element:
7365 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)
7366 In the first case, the FRAME-PARAMETERS are pairs of the form
7367 \(PARAMETER . VALUE); these parameter values are used to create the frame.
7368 In the second case, FUNCTION is called with BUFFER as the first argument,
7369 followed by the OTHER-ARGS--it can display BUFFER in any way it likes.
7370 All this is done by the function found in `special-display-function'.
7372 If the specified frame parameters include (same-buffer . t), the
7373 buffer is displayed in the currently selected window. Otherwise, if
7374 they include (same-frame . t), the buffer is displayed in a new window
7375 in the currently selected frame.
7377 If this variable appears \"not to work\", because you add a name to it
7378 but that buffer still appears in the selected window, look at the
7379 values of `same-window-buffer-names' and `same-window-regexps'.
7380 Those variables take precedence over this one. */);
7381 Vspecial_display_buffer_names
= Qnil
;
7383 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
7384 doc
: /* *List of regexps saying which buffers should have their own special frames.
7385 When displaying a buffer with `display-buffer' or `pop-to-buffer',
7386 if any regexp in this list matches the buffer name, it makes a
7387 special frame for the buffer by calling `special-display-function'.
7389 An element of the list can be a list instead of just a string.
7390 There are two ways to use a list as an element:
7391 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)
7392 In the first case, the FRAME-PARAMETERS are pairs of the form
7393 \(PARAMETER . VALUE); these parameter values are used to create the frame.
7394 In the second case, FUNCTION is called with BUFFER as the first argument,
7395 followed by the OTHER-ARGS--it can display the buffer in any way it likes.
7396 All this is done by the function found in `special-display-function'.
7398 If the specified frame parameters include (same-buffer . t), the
7399 buffer is displayed in the currently selected window. Otherwise, if
7400 they include (same-frame . t), the buffer is displayed in a new window
7401 in the currently selected frame.
7403 If this variable appears \"not to work\", because you add a regexp to it
7404 but the matching buffers still appear in the selected window, look at the
7405 values of `same-window-buffer-names' and `same-window-regexps'.
7406 Those variables take precedence over this one. */);
7407 Vspecial_display_regexps
= Qnil
;
7409 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
7410 doc
: /* Function to call to make a new frame for a special buffer.
7411 It is called with two arguments, the buffer and optional buffer specific
7412 data, and should return a window displaying that buffer.
7413 The default value normally makes a separate frame for the buffer,
7414 using `special-display-frame-alist' to specify the frame parameters.
7415 But if the buffer specific data includes (same-buffer . t) then the
7416 buffer is displayed in the current selected window.
7417 Otherwise if it includes (same-frame . t) then the buffer is displayed in
7418 a new window in the currently selected frame.
7420 A buffer is special if it is listed in `special-display-buffer-names'
7421 or matches a regexp in `special-display-regexps'. */);
7422 Vspecial_display_function
= Qnil
;
7424 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
7425 doc
: /* *List of buffer names that should appear in the selected window.
7426 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'
7427 switches to it in the selected window, rather than making it appear
7428 in some other window.
7430 An element of the list can be a cons cell instead of just a string.
7431 Then the car must be a string, which specifies the buffer name.
7432 This is for compatibility with `special-display-buffer-names';
7433 the cdr of the cons cell is ignored.
7435 See also `same-window-regexps'. */);
7436 Vsame_window_buffer_names
= Qnil
;
7438 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
7439 doc
: /* *List of regexps saying which buffers should appear in the selected window.
7440 If a buffer name matches one of these regexps, then displaying it
7441 using `display-buffer' or `pop-to-buffer' switches to it
7442 in the selected window, rather than making it appear in some other window.
7444 An element of the list can be a cons cell instead of just a string.
7445 Then the car must be a string, which specifies the buffer name.
7446 This is for compatibility with `special-display-buffer-names';
7447 the cdr of the cons cell is ignored.
7449 See also `same-window-buffer-names'. */);
7450 Vsame_window_regexps
= Qnil
;
7452 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
7453 doc
: /* *Non-nil means display-buffer should make new windows. */);
7456 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
7457 doc
: /* *Number of lines of continuity when scrolling by screenfuls. */);
7458 next_screen_context_lines
= 2;
7460 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
7461 doc
: /* *A window must be at least this tall to be eligible for splitting
7462 by `display-buffer'. The value is in line units.
7463 If there is only one window, it is split regardless of this value. */);
7464 split_height_threshold
= 500;
7466 DEFVAR_INT ("window-min-height", &window_min_height
,
7467 doc
: /* *Delete any window less than this tall (including its mode line).
7468 The value is in line units. */);
7469 window_min_height
= 4;
7471 DEFVAR_INT ("window-min-width", &window_min_width
,
7472 doc
: /* *Delete any window less than this wide (measured in characters). */);
7473 window_min_width
= 10;
7475 DEFVAR_LISP ("scroll-preserve-screen-position",
7476 &Vscroll_preserve_screen_position
,
7477 doc
: /* *Controls if scroll commands move point to keep its screen line unchanged.
7478 A value of nil means point does not keep its screen position except
7479 at the scroll margin or window boundary respectively.
7480 A value of t means point keeps its screen position if the scroll
7481 command moved it vertically out of the window, e.g. when scrolling
7483 Any other value means point always keeps its screen position. */);
7484 Vscroll_preserve_screen_position
= Qnil
;
7486 DEFVAR_LISP ("window-configuration-change-hook",
7487 &Vwindow_configuration_change_hook
,
7488 doc
: /* Functions to call when window configuration changes.
7489 The selected frame is the one whose configuration has changed. */);
7490 Vwindow_configuration_change_hook
= Qnil
;
7492 defsubr (&Sselected_window
);
7493 defsubr (&Sminibuffer_window
);
7494 defsubr (&Swindow_minibuffer_p
);
7495 defsubr (&Swindowp
);
7496 defsubr (&Swindow_live_p
);
7497 defsubr (&Spos_visible_in_window_p
);
7498 defsubr (&Swindow_line_height
);
7499 defsubr (&Swindow_buffer
);
7500 defsubr (&Swindow_height
);
7501 defsubr (&Swindow_width
);
7502 defsubr (&Swindow_hscroll
);
7503 defsubr (&Sset_window_hscroll
);
7504 defsubr (&Swindow_redisplay_end_trigger
);
7505 defsubr (&Sset_window_redisplay_end_trigger
);
7506 defsubr (&Swindow_edges
);
7507 defsubr (&Swindow_pixel_edges
);
7508 defsubr (&Swindow_inside_edges
);
7509 defsubr (&Swindow_inside_pixel_edges
);
7510 defsubr (&Scoordinates_in_window_p
);
7511 defsubr (&Swindow_at
);
7512 defsubr (&Swindow_point
);
7513 defsubr (&Swindow_start
);
7514 defsubr (&Swindow_end
);
7515 defsubr (&Sset_window_point
);
7516 defsubr (&Sset_window_start
);
7517 defsubr (&Swindow_dedicated_p
);
7518 defsubr (&Sset_window_dedicated_p
);
7519 defsubr (&Swindow_display_table
);
7520 defsubr (&Sset_window_display_table
);
7521 defsubr (&Snext_window
);
7522 defsubr (&Sprevious_window
);
7523 defsubr (&Sother_window
);
7524 defsubr (&Sget_lru_window
);
7525 defsubr (&Sget_largest_window
);
7526 defsubr (&Sget_buffer_window
);
7527 defsubr (&Sdelete_other_windows
);
7528 defsubr (&Sdelete_windows_on
);
7529 defsubr (&Sreplace_buffer_in_windows
);
7530 defsubr (&Sdelete_window
);
7531 defsubr (&Sset_window_buffer
);
7532 defsubr (&Sselect_window
);
7533 defsubr (&Sspecial_display_p
);
7534 defsubr (&Ssame_window_p
);
7535 defsubr (&Sdisplay_buffer
);
7536 defsubr (&Sforce_window_update
);
7537 defsubr (&Ssplit_window
);
7538 defsubr (&Senlarge_window
);
7539 defsubr (&Sshrink_window
);
7540 defsubr (&Sadjust_window_trailing_edge
);
7541 defsubr (&Sscroll_up
);
7542 defsubr (&Sscroll_down
);
7543 defsubr (&Sscroll_left
);
7544 defsubr (&Sscroll_right
);
7545 defsubr (&Sother_window_for_scrolling
);
7546 defsubr (&Sscroll_other_window
);
7547 defsubr (&Sminibuffer_selected_window
);
7548 defsubr (&Srecenter
);
7549 defsubr (&Swindow_text_height
);
7550 defsubr (&Smove_to_window_line
);
7551 defsubr (&Swindow_configuration_p
);
7552 defsubr (&Swindow_configuration_frame
);
7553 defsubr (&Sset_window_configuration
);
7554 defsubr (&Scurrent_window_configuration
);
7555 defsubr (&Ssave_window_excursion
);
7556 defsubr (&Swindow_tree
);
7557 defsubr (&Sset_window_margins
);
7558 defsubr (&Swindow_margins
);
7559 defsubr (&Sset_window_fringes
);
7560 defsubr (&Swindow_fringes
);
7561 defsubr (&Sset_window_scroll_bars
);
7562 defsubr (&Swindow_scroll_bars
);
7563 defsubr (&Swindow_vscroll
);
7564 defsubr (&Sset_window_vscroll
);
7565 defsubr (&Scompare_window_configurations
);
7566 defsubr (&Swindow_list
);
7572 initial_define_key (control_x_map
, '1', "delete-other-windows");
7573 initial_define_key (control_x_map
, '2', "split-window");
7574 initial_define_key (control_x_map
, '0', "delete-window");
7575 initial_define_key (control_x_map
, 'o', "other-window");
7576 initial_define_key (control_x_map
, '^', "enlarge-window");
7577 initial_define_key (control_x_map
, '<', "scroll-left");
7578 initial_define_key (control_x_map
, '>', "scroll-right");
7580 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
7581 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
7582 initial_define_key (meta_map
, 'v', "scroll-down");
7584 initial_define_key (global_map
, Ctl('L'), "recenter");
7585 initial_define_key (meta_map
, 'r', "move-to-window-line");
7588 /* arch-tag: 90a9c576-0590-48f1-a5f1-6c96a0452d9f
7589 (do not change this comment) */