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. */
36 #include "dispextern.h"
37 #include "blockinput.h"
38 #include "intervals.h"
42 #endif /* HAVE_X_WINDOWS */
54 Lisp_Object Qwindowp
, Qwindow_live_p
, Qwindow_configuration_p
;
55 Lisp_Object Qscroll_up
, Qscroll_down
;
56 Lisp_Object Qwindow_size_fixed
;
57 extern Lisp_Object Qleft_margin
, Qright_margin
;
59 static int displayed_window_lines
P_ ((struct window
*));
60 static struct window
*decode_window
P_ ((Lisp_Object
));
61 static int count_windows
P_ ((struct window
*));
62 static int get_leaf_windows
P_ ((struct window
*, struct window
**, int));
63 static void window_scroll
P_ ((Lisp_Object
, int, int, int));
64 static void window_scroll_pixel_based
P_ ((Lisp_Object
, int, int, int));
65 static void window_scroll_line_based
P_ ((Lisp_Object
, int, int, int));
66 static int window_min_size_1
P_ ((struct window
*, int));
67 static int window_min_size
P_ ((struct window
*, int, int, int *));
68 static void size_window
P_ ((Lisp_Object
, int, int, int, int, int));
69 static int freeze_window_start
P_ ((struct window
*, void *));
70 static int window_fixed_size_p
P_ ((struct window
*, int, int));
71 static void enlarge_window
P_ ((Lisp_Object
, int, int));
72 static Lisp_Object window_list
P_ ((void));
73 static int add_window_to_list
P_ ((struct window
*, void *));
74 static int candidate_window_p
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
,
76 static Lisp_Object next_window
P_ ((Lisp_Object
, Lisp_Object
,
78 static void decode_next_window_args
P_ ((Lisp_Object
*, Lisp_Object
*,
80 static int foreach_window_1
P_ ((struct window
*,
81 int (* fn
) (struct window
*, void *),
83 static Lisp_Object window_list_1
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
));
85 /* This is the window in which the terminal's cursor should
86 be left when nothing is being done with it. This must
87 always be a leaf window, and its buffer is selected by
88 the top level editing loop at the end of each command.
90 This value is always the same as
91 FRAME_SELECTED_WINDOW (selected_frame). */
93 Lisp_Object selected_window
;
95 /* A list of all windows for use by next_window and Fwindow_list.
96 Functions creating or deleting windows should invalidate this cache
97 by setting it to nil. */
99 Lisp_Object Vwindow_list
;
101 /* The mini-buffer window of the selected frame.
102 Note that you cannot test for mini-bufferness of an arbitrary window
103 by comparing against this; but you can test for mini-bufferness of
104 the selected window. */
106 Lisp_Object minibuf_window
;
108 /* Non-nil means it is the window whose mode line should be
109 shown as the selected window when the minibuffer is selected. */
111 Lisp_Object minibuf_selected_window
;
113 /* Non-nil means it is the window for C-M-v to scroll
114 when the mini-buffer is selected. */
116 Lisp_Object Vminibuf_scroll_window
;
118 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
120 Lisp_Object Vother_window_scroll_buffer
;
122 /* Non-nil means it's function to call to display temp buffers. */
124 Lisp_Object Vtemp_buffer_show_function
;
126 /* Non-zero means line and page scrolling on tall lines (with images)
127 does partial scrolling by modifying window-vscroll. */
129 int auto_window_vscroll_p
;
131 /* Non-zero means to use mode-line-inactive face in all windows but the
132 selected-window and the minibuffer-scroll-window when the
133 minibuffer is active. */
134 int mode_line_in_non_selected_windows
;
136 /* If a window gets smaller than either of these, it is removed. */
138 EMACS_INT window_min_height
;
139 EMACS_INT window_min_width
;
141 /* Nonzero implies Fdisplay_buffer should create windows. */
145 /* Nonzero implies make new frames for Fdisplay_buffer. */
149 /* Nonzero means reuse existing frames for displaying buffers. */
151 int display_buffer_reuse_frames
;
153 /* Non-nil means use this function instead of default */
155 Lisp_Object Vpop_up_frame_function
;
157 /* Function to call to handle Fdisplay_buffer. */
159 Lisp_Object Vdisplay_buffer_function
;
161 /* Non-nil means that Fdisplay_buffer should even the heights of windows. */
163 Lisp_Object Veven_window_heights
;
165 /* List of buffer *names* for buffers that should have their own frames. */
167 Lisp_Object Vspecial_display_buffer_names
;
169 /* List of regexps for buffer names that should have their own frames. */
171 Lisp_Object Vspecial_display_regexps
;
173 /* Function to pop up a special frame. */
175 Lisp_Object Vspecial_display_function
;
177 /* List of buffer *names* for buffers to appear in selected window. */
179 Lisp_Object Vsame_window_buffer_names
;
181 /* List of regexps for buffer names to appear in selected window. */
183 Lisp_Object Vsame_window_regexps
;
185 /* Hook run at end of temp_output_buffer_show. */
187 Lisp_Object Qtemp_buffer_show_hook
;
189 /* Fdisplay_buffer always splits the largest window
190 if that window is more than this high. */
192 EMACS_INT split_height_threshold
;
194 /* Number of lines of continuity in scrolling by screenfuls. */
196 EMACS_INT next_screen_context_lines
;
198 /* Incremented for each window created. */
200 static int sequence_number
;
202 /* Nonzero after init_window_once has finished. */
204 static int window_initialized
;
206 /* Hook to run when window config changes. */
208 Lisp_Object Qwindow_configuration_change_hook
;
209 Lisp_Object Vwindow_configuration_change_hook
;
211 /* Non-nil means scroll commands try to put point
212 at the same screen height as previously. */
214 Lisp_Object Vscroll_preserve_screen_position
;
216 /* Incremented by 1 whenever a window is deleted. */
218 int window_deletion_count
;
220 /* Used by the function window_scroll_pixel_based */
222 static int window_scroll_pixel_based_preserve_y
;
224 #if 0 /* This isn't used anywhere. */
225 /* Nonzero means we can split a frame even if it is "unsplittable". */
226 static int inhibit_frame_unsplittable
;
229 extern EMACS_INT scroll_margin
;
231 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
233 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
234 doc
: /* Returns t if OBJECT is a window. */)
238 return WINDOWP (object
) ? Qt
: Qnil
;
241 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
242 doc
: /* Returns t if OBJECT is a window which is currently visible. */)
246 return WINDOW_LIVE_P (object
) ? Qt
: Qnil
;
253 register struct window
*p
;
255 p
= allocate_window ();
257 XSETFASTINT (p
->sequence_number
, sequence_number
);
258 XSETFASTINT (p
->left_col
, 0);
259 XSETFASTINT (p
->top_line
, 0);
260 XSETFASTINT (p
->total_lines
, 0);
261 XSETFASTINT (p
->total_cols
, 0);
262 XSETFASTINT (p
->hscroll
, 0);
263 XSETFASTINT (p
->min_hscroll
, 0);
264 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
265 p
->start
= Fmake_marker ();
266 p
->pointm
= Fmake_marker ();
267 XSETFASTINT (p
->use_time
, 0);
269 p
->display_table
= Qnil
;
271 p
->pseudo_window_p
= 0;
272 bzero (&p
->cursor
, sizeof (p
->cursor
));
273 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
274 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
275 p
->desired_matrix
= p
->current_matrix
= 0;
276 p
->nrows_scale_factor
= p
->ncols_scale_factor
= 1;
277 p
->phys_cursor_type
= -1;
278 p
->phys_cursor_width
= -1;
279 p
->must_be_updated_p
= 0;
280 XSETFASTINT (p
->window_end_vpos
, 0);
281 XSETFASTINT (p
->window_end_pos
, 0);
282 p
->window_end_valid
= Qnil
;
285 XSETFASTINT (p
->last_point
, 0);
286 p
->frozen_window_start_p
= 0;
287 p
->last_cursor_off_p
= p
->cursor_off_p
= 0;
288 p
->left_margin_cols
= Qnil
;
289 p
->right_margin_cols
= Qnil
;
290 p
->left_fringe_width
= Qnil
;
291 p
->right_fringe_width
= Qnil
;
292 p
->fringes_outside_margins
= Qnil
;
293 p
->scroll_bar_width
= Qnil
;
294 p
->vertical_scroll_bar_type
= Qt
;
300 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
301 doc
: /* Return the window that the cursor now appears in and commands apply to. */)
304 return selected_window
;
307 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
308 doc
: /* Return the window used now for minibuffers.
309 If the optional argument FRAME is specified, return the minibuffer window
310 used by that frame. */)
315 frame
= selected_frame
;
316 CHECK_LIVE_FRAME (frame
);
317 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
320 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
321 doc
: /* Returns non-nil if WINDOW is a minibuffer window.
322 WINDOW defaults to the selected window. */)
326 struct window
*w
= decode_window (window
);
327 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
331 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
332 Spos_visible_in_window_p
, 0, 3, 0,
333 doc
: /* Return non-nil if position POS is currently on the frame in WINDOW.
334 Return nil if that position is scrolled vertically out of view.
335 If a character is only partially visible, nil is returned, unless the
336 optional argument PARTIALLY is non-nil.
337 If POS is only out of view because of horizontal scrolling, return non-nil.
338 If POS is t, it specifies the position of the last visible glyph in WINDOW.
339 POS defaults to point in WINDOW; WINDOW defaults to the selected window.
341 If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil,
342 return value is a list of 2 or 6 elements (X Y [RTOP RBOT ROWH VPOS]),
343 where X and Y are the pixel coordinates relative to the top left corner
344 of the window. The remaining elements are omitted if the character after
345 POS is fully visible; otherwise, RTOP and RBOT are the number of pixels
346 off-window at the top and bottom of the row, ROWH is the height of the
347 display row, and VPOS is the row number (0-based) containing POS. */)
348 (pos
, window
, partially
)
349 Lisp_Object pos
, window
, partially
;
351 register struct window
*w
;
353 register struct buffer
*buf
;
355 Lisp_Object in_window
= Qnil
;
356 int rtop
, rbot
, rowh
, vpos
, fully_p
= 1;
359 w
= decode_window (window
);
360 buf
= XBUFFER (w
->buffer
);
361 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
365 else if (!NILP (pos
))
367 CHECK_NUMBER_COERCE_MARKER (pos
);
370 else if (w
== XWINDOW (selected_window
))
373 posint
= XMARKER (w
->pointm
)->charpos
;
375 /* If position is above window start or outside buffer boundaries,
376 or if window start is out of range, position is not visible. */
378 || (posint
>= CHARPOS (top
) && posint
<= BUF_ZV (buf
)))
379 && CHARPOS (top
) >= BUF_BEGV (buf
)
380 && CHARPOS (top
) <= BUF_ZV (buf
)
381 && pos_visible_p (w
, posint
, &x
, &y
, &rtop
, &rbot
, &rowh
, &vpos
)
382 && (fully_p
= !rtop
&& !rbot
, (!NILP (partially
) || fully_p
)))
385 if (!NILP (in_window
) && !NILP (partially
))
387 Lisp_Object part
= Qnil
;
389 part
= list4 (make_number (rtop
), make_number (rbot
),
390 make_number (rowh
), make_number (vpos
));
391 in_window
= Fcons (make_number (x
),
392 Fcons (make_number (y
), part
));
398 DEFUN ("window-line-height", Fwindow_line_height
,
399 Swindow_line_height
, 0, 2, 0,
400 doc
: /* Return height in pixels of text line LINE in window WINDOW.
401 If WINDOW is nil or omitted, use selected window.
403 Return height of current line if LINE is omitted or nil. Return height of
404 header or mode line if LINE is `header-line' and `mode-line'.
405 Otherwise, LINE is a text line number starting from 0. A negative number
406 counts from the end of the window.
408 Value is a list (HEIGHT VPOS YPOS OFFBOT), where HEIGHT is the height
409 in pixels of the visible part of the line, VPOS and YPOS are the
410 vertical position in lines and pixels of the line, relative to the top
411 of the first text line, and OFFBOT is the number of off-window pixels at
412 the bottom of the text line. If there are off-window pixels at the top
413 of the (first) text line, YPOS is negative.
415 Return nil if window display is not up-to-date. In that case, use
416 `pos-visible-in-window-p' to obtain the information. */)
418 Lisp_Object line
, window
;
420 register struct window
*w
;
421 register struct buffer
*b
;
422 struct glyph_row
*row
, *end_row
;
423 int max_y
, crop
, i
, n
;
425 w
= decode_window (window
);
428 || w
->pseudo_window_p
)
431 CHECK_BUFFER (w
->buffer
);
432 b
= XBUFFER (w
->buffer
);
434 /* Fail if current matrix is not up-to-date. */
435 if (NILP (w
->window_end_valid
)
436 || current_buffer
->clip_changed
437 || current_buffer
->prevent_redisplay_optimizations_p
438 || XFASTINT (w
->last_modified
) < BUF_MODIFF (b
)
439 || XFASTINT (w
->last_overlay_modified
) < BUF_OVERLAY_MODIFF (b
))
445 if (i
< 0 || i
>= w
->current_matrix
->nrows
446 || (row
= MATRIX_ROW (w
->current_matrix
, i
), !row
->enabled_p
))
448 max_y
= window_text_bottom_y (w
);
452 if (EQ (line
, Qheader_line
))
454 if (!WINDOW_WANTS_HEADER_LINE_P (w
))
456 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
459 return list4 (make_number (row
->height
),
460 make_number (0), make_number (0),
464 if (EQ (line
, Qmode_line
))
466 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
469 return list4 (make_number (row
->height
),
470 make_number (0), /* not accurate */
471 make_number (WINDOW_HEADER_LINE_HEIGHT (w
)
472 + window_text_bottom_y (w
)),
479 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
480 end_row
= MATRIX_BOTTOM_TEXT_ROW (w
->current_matrix
, w
);
481 max_y
= window_text_bottom_y (w
);
484 while ((n
< 0 || i
< n
)
485 && row
<= end_row
&& row
->enabled_p
486 && row
->y
+ row
->height
< max_y
)
489 if (row
> end_row
|| !row
->enabled_p
)
501 crop
= max (0, (row
->y
+ row
->height
) - max_y
);
502 return list4 (make_number (row
->height
+ min (0, row
->y
) - crop
),
504 make_number (row
->y
),
510 static struct window
*
511 decode_window (window
)
512 register Lisp_Object window
;
515 return XWINDOW (selected_window
);
517 CHECK_LIVE_WINDOW (window
);
518 return XWINDOW (window
);
521 static struct window
*
522 decode_any_window (window
)
523 register Lisp_Object window
;
526 return XWINDOW (selected_window
);
528 CHECK_WINDOW (window
);
529 return XWINDOW (window
);
532 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
533 doc
: /* Return the buffer that WINDOW is displaying.
534 WINDOW defaults to the selected window. */)
538 return decode_window (window
)->buffer
;
541 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
542 doc
: /* Return the number of lines in WINDOW (including its mode line).
543 WINDOW defaults to the selected window. */)
547 return decode_any_window (window
)->total_lines
;
550 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
551 doc
: /* Return the number of display columns in WINDOW.
552 This is the width that is usable columns available for text in WINDOW.
553 If you want to find out how many columns WINDOW takes up,
554 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */)
558 return make_number (window_box_text_cols (decode_any_window (window
)));
561 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
562 doc
: /* Return the number of columns by which WINDOW is scrolled from left margin.
563 WINDOW defaults to the selected window. */)
567 return decode_window (window
)->hscroll
;
570 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
571 doc
: /* Set number of columns WINDOW is scrolled from left margin to NCOL.
572 Return NCOL. NCOL should be zero or positive.
574 Note that if `automatic-hscrolling' is non-nil, you cannot scroll the
575 window so that the location of point moves off-window. */)
577 Lisp_Object window
, ncol
;
579 struct window
*w
= decode_window (window
);
583 hscroll
= max (0, XINT (ncol
));
585 /* Prevent redisplay shortcuts when changing the hscroll. */
586 if (XINT (w
->hscroll
) != hscroll
)
587 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
589 w
->hscroll
= make_number (hscroll
);
593 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
594 Swindow_redisplay_end_trigger
, 0, 1, 0,
595 doc
: /* Return WINDOW's redisplay end trigger value.
596 WINDOW defaults to the selected window.
597 See `set-window-redisplay-end-trigger' for more information. */)
601 return decode_window (window
)->redisplay_end_trigger
;
604 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
605 Sset_window_redisplay_end_trigger
, 2, 2, 0,
606 doc
: /* Set WINDOW's redisplay end trigger value to VALUE.
607 VALUE should be a buffer position (typically a marker) or nil.
608 If it is a buffer position, then if redisplay in WINDOW reaches a position
609 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
610 with two arguments: WINDOW, and the end trigger value.
611 Afterwards the end-trigger value is reset to nil. */)
613 register Lisp_Object window
, value
;
615 register struct window
*w
;
617 w
= decode_window (window
);
618 w
->redisplay_end_trigger
= value
;
622 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
623 doc
: /* Return a list of the edge coordinates of WINDOW.
624 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
625 RIGHT is one more than the rightmost column occupied by WINDOW,
626 and BOTTOM is one more than the bottommost row occupied by WINDOW.
627 The edges include the space used by the window's scroll bar,
628 display margins, fringes, header line, and mode line, if it has them.
629 To get the edges of the actual text area, use `window-inside-edges'. */)
633 register struct window
*w
= decode_any_window (window
);
635 return Fcons (make_number (WINDOW_LEFT_EDGE_COL (w
)),
636 Fcons (make_number (WINDOW_TOP_EDGE_LINE (w
)),
637 Fcons (make_number (WINDOW_RIGHT_EDGE_COL (w
)),
638 Fcons (make_number (WINDOW_BOTTOM_EDGE_LINE (w
)),
642 DEFUN ("window-pixel-edges", Fwindow_pixel_edges
, Swindow_pixel_edges
, 0, 1, 0,
643 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
644 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
645 RIGHT is one more than the rightmost x position occupied by WINDOW,
646 and BOTTOM is one more than the bottommost y position occupied by WINDOW.
647 The pixel edges include the space used by the window's scroll bar,
648 display margins, fringes, header line, and mode line, if it has them.
649 To get the edges of the actual text area, use `window-inside-pixel-edges'. */)
653 register struct window
*w
= decode_any_window (window
);
655 return Fcons (make_number (WINDOW_LEFT_EDGE_X (w
)),
656 Fcons (make_number (WINDOW_TOP_EDGE_Y (w
)),
657 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w
)),
658 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w
)),
662 DEFUN ("window-inside-edges", Fwindow_inside_edges
, Swindow_inside_edges
, 0, 1, 0,
663 doc
: /* Return a list of the edge coordinates of WINDOW.
664 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
665 RIGHT is one more than the rightmost column used by text in WINDOW,
666 and BOTTOM is one more than the bottommost row used by text in WINDOW.
667 The inside edges do not include the space used by the window's scroll bar,
668 display margins, fringes, header line, and/or mode line. */)
672 register struct window
*w
= decode_any_window (window
);
674 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_COL (w
)
675 + WINDOW_LEFT_MARGIN_COLS (w
)
676 + WINDOW_LEFT_FRINGE_COLS (w
)),
677 make_number (WINDOW_TOP_EDGE_LINE (w
)
678 + WINDOW_HEADER_LINE_LINES (w
)),
679 make_number (WINDOW_BOX_RIGHT_EDGE_COL (w
)
680 - WINDOW_RIGHT_MARGIN_COLS (w
)
681 - WINDOW_RIGHT_FRINGE_COLS (w
)),
682 make_number (WINDOW_BOTTOM_EDGE_LINE (w
)
683 - WINDOW_MODE_LINE_LINES (w
)));
686 DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges
, Swindow_inside_pixel_edges
, 0, 1, 0,
687 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
688 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.
689 RIGHT is one more than the rightmost x position used by text in WINDOW,
690 and BOTTOM is one more than the bottommost y position used by text in WINDOW.
691 The inside edges do not include the space used by the window's scroll bar,
692 display margins, fringes, header line, and/or mode line. */)
696 register struct window
*w
= decode_any_window (window
);
698 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w
)
699 + WINDOW_LEFT_MARGIN_WIDTH (w
)
700 + WINDOW_LEFT_FRINGE_WIDTH (w
)),
701 make_number (WINDOW_TOP_EDGE_Y (w
)
702 + WINDOW_HEADER_LINE_HEIGHT (w
)),
703 make_number (WINDOW_BOX_RIGHT_EDGE_X (w
)
704 - WINDOW_RIGHT_MARGIN_WIDTH (w
)
705 - WINDOW_RIGHT_FRINGE_WIDTH (w
)),
706 make_number (WINDOW_BOTTOM_EDGE_Y (w
)
707 - WINDOW_MODE_LINE_HEIGHT (w
)));
710 /* Test if the character at column *X, row *Y is within window W.
711 If it is not, return ON_NOTHING;
712 if it is in the window's text area,
713 set *x and *y to its location relative to the upper left corner
716 if it is on the window's modeline, return ON_MODE_LINE;
717 if it is on the border between the window and its right sibling,
718 return ON_VERTICAL_BORDER.
719 if it is on a scroll bar,
720 return ON_SCROLL_BAR.
721 if it is on the window's top line, return ON_HEADER_LINE;
722 if it is in left or right fringe of the window,
723 return ON_LEFT_FRINGE or ON_RIGHT_FRINGE, and convert *X and *Y
724 to window-relative coordinates;
725 if it is in the marginal area to the left/right of the window,
726 return ON_LEFT_MARGIN or ON_RIGHT_MARGIN, and convert *X and *Y
727 to window-relative coordinates.
729 X and Y are frame relative pixel coordinates. */
731 static enum window_part
732 coordinates_in_window (w
, x
, y
)
733 register struct window
*w
;
736 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
737 int left_x
, right_x
, top_y
, bottom_y
;
738 enum window_part part
;
739 int ux
= FRAME_COLUMN_WIDTH (f
);
740 int x0
= WINDOW_LEFT_EDGE_X (w
);
741 int x1
= WINDOW_RIGHT_EDGE_X (w
);
742 /* The width of the area where the vertical line can be dragged.
743 (Between mode lines for instance. */
744 int grabbable_width
= ux
;
745 int lmargin_width
, rmargin_width
, text_left
, text_right
;
747 /* In what's below, we subtract 1 when computing right_x because we
748 want the rightmost pixel, which is given by left_pixel+width-1. */
749 if (w
->pseudo_window_p
)
752 right_x
= WINDOW_TOTAL_WIDTH (w
) - 1;
753 top_y
= WINDOW_TOP_EDGE_Y (w
);
754 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
758 left_x
= WINDOW_BOX_LEFT_EDGE_X (w
);
759 right_x
= WINDOW_BOX_RIGHT_EDGE_X (w
) - 1;
760 top_y
= WINDOW_TOP_EDGE_Y (w
);
761 bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
764 /* Outside any interesting row? */
765 if (*y
< top_y
|| *y
>= bottom_y
)
768 /* On the mode line or header line? If it's near the start of
769 the mode or header line of window that's has a horizontal
770 sibling, say it's on the vertical line. That's to be able
771 to resize windows horizontally in case we're using toolkit
774 if (WINDOW_WANTS_MODELINE_P (w
)
775 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
))
779 header_vertical_border_check
:
780 /* We're somewhere on the mode line. We consider the place
781 between mode lines of horizontally adjacent mode lines
782 as the vertical border. If scroll bars on the left,
783 return the right window. */
784 if (WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w
)
785 || WINDOW_RIGHTMOST_P (w
))
787 if (!WINDOW_LEFTMOST_P (w
) && abs (*x
- x0
) < grabbable_width
)
789 /* Convert X and Y to window relative coordinates.
790 Vertical border is at the left edge of window. */
791 *x
= max (0, *x
- x0
);
793 return ON_VERTICAL_BORDER
;
798 if (abs (*x
- x1
) < grabbable_width
)
800 /* Convert X and Y to window relative coordinates.
801 Vertical border is at the right edge of window. */
802 *x
= min (x1
, *x
) - x0
;
804 return ON_VERTICAL_BORDER
;
808 if (*x
< x0
|| *x
>= x1
)
811 /* Convert X and Y to window relative coordinates.
812 Mode line starts at left edge of window. */
818 if (WINDOW_WANTS_HEADER_LINE_P (w
)
819 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
))
821 part
= ON_HEADER_LINE
;
822 goto header_vertical_border_check
;
825 if (*x
< x0
|| *x
>= x1
)
828 /* Outside any interesting column? */
829 if (*x
< left_x
|| *x
> right_x
)
832 return ON_SCROLL_BAR
;
835 lmargin_width
= window_box_width (w
, LEFT_MARGIN_AREA
);
836 rmargin_width
= window_box_width (w
, RIGHT_MARGIN_AREA
);
838 text_left
= window_box_left (w
, TEXT_AREA
);
839 text_right
= text_left
+ window_box_width (w
, TEXT_AREA
);
841 if (FRAME_WINDOW_P (f
))
843 if (!w
->pseudo_window_p
844 && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w
)
845 && !WINDOW_RIGHTMOST_P (w
)
846 && (abs (*x
- right_x
) < grabbable_width
))
848 /* Convert X and Y to window relative coordinates.
849 Vertical border is at the right edge of window. */
850 *x
= min (right_x
, *x
) - left_x
;
852 return ON_VERTICAL_BORDER
;
857 /* Need to say "*x > right_x" rather than >=, since on character
858 terminals, the vertical line's x coordinate is right_x. */
859 if (!w
->pseudo_window_p
860 && !WINDOW_RIGHTMOST_P (w
)
861 && *x
> right_x
- ux
)
863 /* On the border on the right side of the window? Assume that
864 this area begins at RIGHT_X minus a canonical char width. */
865 *x
= min (right_x
, *x
) - left_x
;
867 return ON_VERTICAL_BORDER
;
873 if (lmargin_width
> 0
874 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
875 ? (*x
>= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
))
876 : (*x
< left_x
+ lmargin_width
)))
879 if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
880 *x
-= WINDOW_LEFT_FRINGE_WIDTH (w
);
882 return ON_LEFT_MARGIN
;
885 /* Convert X and Y to window-relative pixel coordinates. */
888 return ON_LEFT_FRINGE
;
891 if (*x
>= text_right
)
893 if (rmargin_width
> 0
894 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
895 ? (*x
< right_x
- WINDOW_RIGHT_FRINGE_WIDTH (w
))
896 : (*x
>= right_x
- rmargin_width
)))
898 *x
-= right_x
- rmargin_width
;
899 if (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
900 *x
+= WINDOW_RIGHT_FRINGE_WIDTH (w
);
902 return ON_RIGHT_MARGIN
;
905 /* Convert X and Y to window-relative pixel coordinates. */
906 *x
-= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
);
908 return ON_RIGHT_FRINGE
;
911 /* Everything special ruled out - must be on text area */
918 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
919 Scoordinates_in_window_p
, 2, 2, 0,
920 doc
: /* Return non-nil if COORDINATES are in WINDOW.
921 COORDINATES is a cons of the form (X . Y), X and Y being distances
922 measured in characters from the upper-left corner of the frame.
923 \(0 . 0) denotes the character in the upper left corner of the
925 If COORDINATES are in the text portion of WINDOW,
926 the coordinates relative to the window are returned.
927 If they are in the mode line of WINDOW, `mode-line' is returned.
928 If they are in the top mode line of WINDOW, `header-line' is returned.
929 If they are in the left fringe of WINDOW, `left-fringe' is returned.
930 If they are in the right fringe of WINDOW, `right-fringe' is returned.
931 If they are on the border between WINDOW and its right sibling,
932 `vertical-line' is returned.
933 If they are in the windows's left or right marginal areas, `left-margin'\n\
934 or `right-margin' is returned. */)
935 (coordinates
, window
)
936 register Lisp_Object coordinates
, window
;
943 CHECK_WINDOW (window
);
944 w
= XWINDOW (window
);
945 f
= XFRAME (w
->frame
);
946 CHECK_CONS (coordinates
);
947 lx
= Fcar (coordinates
);
948 ly
= Fcdr (coordinates
);
949 CHECK_NUMBER_OR_FLOAT (lx
);
950 CHECK_NUMBER_OR_FLOAT (ly
);
951 x
= FRAME_PIXEL_X_FROM_CANON_X (f
, lx
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
952 y
= FRAME_PIXEL_Y_FROM_CANON_Y (f
, ly
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
954 switch (coordinates_in_window (w
, &x
, &y
))
960 /* X and Y are now window relative pixel coordinates. Convert
961 them to canonical char units before returning them. */
962 return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f
, x
),
963 FRAME_CANON_Y_FROM_PIXEL_Y (f
, y
));
968 case ON_VERTICAL_BORDER
:
969 return Qvertical_line
;
977 case ON_RIGHT_FRINGE
:
978 return Qright_fringe
;
983 case ON_RIGHT_MARGIN
:
984 return Qright_margin
;
987 /* Historically we are supposed to return nil in this case. */
996 /* Callback for foreach_window, used in window_from_coordinates.
997 Check if window W contains coordinates specified by USER_DATA which
998 is actually a pointer to a struct check_window_data CW.
1000 Check if window W contains coordinates *CW->x and *CW->y. If it
1001 does, return W in *CW->window, as Lisp_Object, and return in
1002 *CW->part the part of the window under coordinates *X,*Y. Return
1003 zero from this function to stop iterating over windows. */
1005 struct check_window_data
1007 Lisp_Object
*window
;
1009 enum window_part
*part
;
1013 check_window_containing (w
, user_data
)
1017 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
1018 enum window_part found
;
1021 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
1022 if (found
!= ON_NOTHING
)
1025 XSETWINDOW (*cw
->window
, w
);
1033 /* Find the window containing frame-relative pixel position X/Y and
1034 return it as a Lisp_Object.
1036 If X, Y is on one of the window's special `window_part' elements,
1037 set *PART to the id of that element, and return X and Y converted
1038 to window relative coordinates in WX and WY.
1040 If there is no window under X, Y return nil and leave *PART
1041 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
1043 This function was previously implemented with a loop cycling over
1044 windows with Fnext_window, and starting with the frame's selected
1045 window. It turned out that this doesn't work with an
1046 implementation of next_window using Vwindow_list, because
1047 FRAME_SELECTED_WINDOW (F) is not always contained in the window
1048 tree of F when this function is called asynchronously from
1049 note_mouse_highlight. The original loop didn't terminate in this
1053 window_from_coordinates (f
, x
, y
, part
, wx
, wy
, tool_bar_p
)
1056 enum window_part
*part
;
1061 struct check_window_data cw
;
1062 enum window_part dummy
;
1068 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
1069 foreach_window (f
, check_window_containing
, &cw
);
1071 /* If not found above, see if it's in the tool bar window, if a tool
1075 && WINDOWP (f
->tool_bar_window
)
1076 && WINDOW_TOTAL_LINES (XWINDOW (f
->tool_bar_window
)) > 0
1077 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
)
1081 window
= f
->tool_bar_window
;
1090 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
1091 doc
: /* Return window containing coordinates X and Y on FRAME.
1092 If omitted, FRAME defaults to the currently selected frame.
1093 The top left corner of the frame is considered to be row 0,
1096 Lisp_Object x
, y
, frame
;
1101 frame
= selected_frame
;
1102 CHECK_LIVE_FRAME (frame
);
1105 /* Check that arguments are integers or floats. */
1106 CHECK_NUMBER_OR_FLOAT (x
);
1107 CHECK_NUMBER_OR_FLOAT (y
);
1109 return window_from_coordinates (f
,
1110 (FRAME_PIXEL_X_FROM_CANON_X (f
, x
)
1111 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
1112 (FRAME_PIXEL_Y_FROM_CANON_Y (f
, y
)
1113 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
1117 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
1118 doc
: /* Return current value of point in WINDOW.
1119 WINDOW defaults to the selected window.
1121 For a nonselected window, this is the value point would have
1122 if that window were selected.
1124 Note that, when WINDOW is the selected window and its buffer
1125 is also currently selected, the value returned is the same as (point).
1126 It would be more strictly correct to return the `top-level' value
1127 of point, outside of any save-excursion forms.
1128 But that is hard to define. */)
1132 register struct window
*w
= decode_window (window
);
1134 if (w
== XWINDOW (selected_window
)
1135 && current_buffer
== XBUFFER (w
->buffer
))
1137 return Fmarker_position (w
->pointm
);
1140 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
1141 doc
: /* Return position at which display currently starts in WINDOW.
1142 WINDOW defaults to the selected window.
1143 This is updated by redisplay or by calling `set-window-start'. */)
1147 return Fmarker_position (decode_window (window
)->start
);
1150 /* This is text temporarily removed from the doc string below.
1152 This function returns nil if the position is not currently known.
1153 That happens when redisplay is preempted and doesn't finish.
1154 If in that case you want to compute where the end of the window would
1155 have been if redisplay had finished, do this:
1157 (goto-char (window-start window))
1158 (vertical-motion (1- (window-height window)) window)
1161 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
1162 doc
: /* Return position at which display currently ends in WINDOW.
1163 WINDOW defaults to the selected window.
1164 This is updated by redisplay, when it runs to completion.
1165 Simply changing the buffer text or setting `window-start'
1166 does not update this value.
1167 Return nil if there is no recorded value. \(This can happen if the
1168 last redisplay of WINDOW was preempted, and did not finish.)
1169 If UPDATE is non-nil, compute the up-to-date position
1170 if it isn't already recorded. */)
1172 Lisp_Object window
, update
;
1175 struct window
*w
= decode_window (window
);
1183 #if 0 /* This change broke some things. We should make it later. */
1184 /* If we don't know the end position, return nil.
1185 The user can compute it with vertical-motion if he wants to.
1186 It would be nicer to do it automatically,
1187 but that's so slow that it would probably bother people. */
1188 if (NILP (w
->window_end_valid
))
1193 && ! (! NILP (w
->window_end_valid
)
1194 && XFASTINT (w
->last_modified
) >= BUF_MODIFF (b
)
1195 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (b
))
1198 struct text_pos startp
;
1200 struct buffer
*old_buffer
= NULL
;
1202 /* Cannot use Fvertical_motion because that function doesn't
1203 cope with variable-height lines. */
1204 if (b
!= current_buffer
)
1206 old_buffer
= current_buffer
;
1207 set_buffer_internal (b
);
1210 /* In case W->start is out of the range, use something
1211 reasonable. This situation occurred when loading a file with
1212 `-l' containing a call to `rmail' with subsequent other
1213 commands. At the end, W->start happened to be BEG, while
1214 rmail had already narrowed the buffer. */
1215 if (XMARKER (w
->start
)->charpos
< BEGV
)
1216 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
1217 else if (XMARKER (w
->start
)->charpos
> ZV
)
1218 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
1220 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
1222 start_display (&it
, w
, startp
);
1223 move_it_vertically (&it
, window_box_height (w
));
1224 if (it
.current_y
< it
.last_visible_y
)
1225 move_it_past_eol (&it
);
1226 value
= make_number (IT_CHARPOS (it
));
1229 set_buffer_internal (old_buffer
);
1232 XSETINT (value
, BUF_Z (b
) - XFASTINT (w
->window_end_pos
));
1237 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
1238 doc
: /* Make point value in WINDOW be at position POS in WINDOW's buffer.
1241 Lisp_Object window
, pos
;
1243 register struct window
*w
= decode_window (window
);
1245 CHECK_NUMBER_COERCE_MARKER (pos
);
1246 if (w
== XWINDOW (selected_window
)
1247 && XBUFFER (w
->buffer
) == current_buffer
)
1250 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
1252 /* We have to make sure that redisplay updates the window to show
1253 the new value of point. */
1254 if (!EQ (window
, selected_window
))
1255 ++windows_or_buffers_changed
;
1260 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
1261 doc
: /* Make display in WINDOW start at position POS in WINDOW's buffer.
1263 Optional third arg NOFORCE non-nil inhibits next redisplay
1264 from overriding motion of point in order to display at this exact start. */)
1265 (window
, pos
, noforce
)
1266 Lisp_Object window
, pos
, noforce
;
1268 register struct window
*w
= decode_window (window
);
1270 CHECK_NUMBER_COERCE_MARKER (pos
);
1271 set_marker_restricted (w
->start
, pos
, w
->buffer
);
1272 /* this is not right, but much easier than doing what is right. */
1273 w
->start_at_line_beg
= Qnil
;
1275 w
->force_start
= Qt
;
1276 w
->update_mode_line
= Qt
;
1277 XSETFASTINT (w
->last_modified
, 0);
1278 XSETFASTINT (w
->last_overlay_modified
, 0);
1279 if (!EQ (window
, selected_window
))
1280 windows_or_buffers_changed
++;
1285 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
1287 doc
: /* Return WINDOW's dedicated object, usually t or nil.
1288 See also `set-window-dedicated-p'. */)
1292 return decode_window (window
)->dedicated
;
1295 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
1296 Sset_window_dedicated_p
, 2, 2, 0,
1297 doc
: /* Control whether WINDOW is dedicated to the buffer it displays.
1298 If it is dedicated, Emacs will not automatically change
1299 which buffer appears in it.
1300 The second argument is the new value for the dedication flag;
1301 non-nil means yes. */)
1303 Lisp_Object window
, arg
;
1305 register struct window
*w
= decode_window (window
);
1309 return w
->dedicated
;
1312 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1314 doc
: /* Return the display-table that WINDOW is using.
1315 WINDOW defaults to the selected window. */)
1319 return decode_window (window
)->display_table
;
1322 /* Get the display table for use on window W. This is either W's
1323 display table or W's buffer's display table. Ignore the specified
1324 tables if they are not valid; if no valid table is specified,
1327 struct Lisp_Char_Table
*
1328 window_display_table (w
)
1331 struct Lisp_Char_Table
*dp
= NULL
;
1333 if (DISP_TABLE_P (w
->display_table
))
1334 dp
= XCHAR_TABLE (w
->display_table
);
1335 else if (BUFFERP (w
->buffer
))
1337 struct buffer
*b
= XBUFFER (w
->buffer
);
1339 if (DISP_TABLE_P (b
->display_table
))
1340 dp
= XCHAR_TABLE (b
->display_table
);
1341 else if (DISP_TABLE_P (Vstandard_display_table
))
1342 dp
= XCHAR_TABLE (Vstandard_display_table
);
1348 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1349 doc
: /* Set WINDOW's display-table to TABLE. */)
1351 register Lisp_Object window
, table
;
1353 register struct window
*w
;
1355 w
= decode_window (window
);
1356 w
->display_table
= table
;
1360 /* Record info on buffer window w is displaying
1361 when it is about to cease to display that buffer. */
1364 register struct window
*w
;
1371 if (b
!= XMARKER (w
->pointm
)->buffer
)
1375 if (w
== XWINDOW (selected_window
)
1376 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1377 /* Do this except when the selected window's buffer
1378 is being removed from some other window. */
1380 /* last_window_start records the start position that this buffer
1381 had in the last window to be disconnected from it.
1382 Now that this statement is unconditional,
1383 it is possible for the buffer to be displayed in the
1384 selected window, while last_window_start reflects another
1385 window which was recently showing the same buffer.
1386 Some people might say that might be a good thing. Let's see. */
1387 b
->last_window_start
= marker_position (w
->start
);
1389 /* Point in the selected window's buffer
1390 is actually stored in that buffer, and the window's pointm isn't used.
1391 So don't clobber point in that buffer. */
1392 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1393 /* This line helps to fix Horsley's testbug.el bug. */
1394 && !(WINDOWP (b
->last_selected_window
)
1395 && w
!= XWINDOW (b
->last_selected_window
)
1396 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1397 temp_set_point_both (b
,
1398 clip_to_bounds (BUF_BEGV (b
),
1399 XMARKER (w
->pointm
)->charpos
,
1401 clip_to_bounds (BUF_BEGV_BYTE (b
),
1402 marker_byte_position (w
->pointm
),
1405 if (WINDOWP (b
->last_selected_window
)
1406 && w
== XWINDOW (b
->last_selected_window
))
1407 b
->last_selected_window
= Qnil
;
1410 /* Put replacement into the window structure in place of old. */
1412 replace_window (old
, replacement
)
1413 Lisp_Object old
, replacement
;
1415 register Lisp_Object tem
;
1416 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1418 /* If OLD is its frame's root_window, then replacement is the new
1419 root_window for that frame. */
1421 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1422 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1424 p
->left_col
= o
->left_col
;
1425 p
->top_line
= o
->top_line
;
1426 p
->total_cols
= o
->total_cols
;
1427 p
->total_lines
= o
->total_lines
;
1428 p
->desired_matrix
= p
->current_matrix
= 0;
1430 bzero (&p
->cursor
, sizeof (p
->cursor
));
1431 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1432 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1433 p
->phys_cursor_type
= -1;
1434 p
->phys_cursor_width
= -1;
1435 p
->must_be_updated_p
= 0;
1436 p
->pseudo_window_p
= 0;
1437 XSETFASTINT (p
->window_end_vpos
, 0);
1438 XSETFASTINT (p
->window_end_pos
, 0);
1439 p
->window_end_valid
= Qnil
;
1440 p
->frozen_window_start_p
= 0;
1441 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
1443 p
->next
= tem
= o
->next
;
1445 XWINDOW (tem
)->prev
= replacement
;
1447 p
->prev
= tem
= o
->prev
;
1449 XWINDOW (tem
)->next
= replacement
;
1451 p
->parent
= tem
= o
->parent
;
1454 if (EQ (XWINDOW (tem
)->vchild
, old
))
1455 XWINDOW (tem
)->vchild
= replacement
;
1456 if (EQ (XWINDOW (tem
)->hchild
, old
))
1457 XWINDOW (tem
)->hchild
= replacement
;
1460 /*** Here, if replacement is a vertical combination
1461 and so is its new parent, we should make replacement's
1462 children be children of that parent instead. ***/
1465 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1466 doc
: /* Remove WINDOW from the display. Default is selected window. */)
1468 register Lisp_Object window
;
1470 delete_window (window
);
1472 if (! NILP (Vwindow_configuration_change_hook
)
1473 && ! NILP (Vrun_hooks
))
1474 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1480 delete_window (window
)
1481 register Lisp_Object window
;
1483 register Lisp_Object tem
, parent
, sib
;
1484 register struct window
*p
;
1485 register struct window
*par
;
1488 /* Because this function is called by other C code on non-leaf
1489 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1490 so we can't decode_window here. */
1492 window
= selected_window
;
1494 CHECK_WINDOW (window
);
1495 p
= XWINDOW (window
);
1497 /* It's a no-op to delete an already-deleted window. */
1498 if (NILP (p
->buffer
)
1500 && NILP (p
->vchild
))
1505 error ("Attempt to delete minibuffer or sole ordinary window");
1506 par
= XWINDOW (parent
);
1508 windows_or_buffers_changed
++;
1509 Vwindow_list
= Qnil
;
1510 f
= XFRAME (WINDOW_FRAME (p
));
1511 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1513 /* Are we trying to delete any frame's selected window? */
1515 Lisp_Object swindow
, pwindow
;
1517 /* See if the frame's selected window is either WINDOW
1518 or any subwindow of it, by finding all that window's parents
1519 and comparing each one with WINDOW. */
1520 swindow
= FRAME_SELECTED_WINDOW (f
);
1525 while (!NILP (pwindow
))
1527 if (EQ (window
, pwindow
))
1529 pwindow
= XWINDOW (pwindow
)->parent
;
1532 /* If the window being deleted is not a parent of SWINDOW,
1533 then SWINDOW is ok as the new selected window. */
1534 if (!EQ (window
, pwindow
))
1536 /* Otherwise, try another window for SWINDOW. */
1537 swindow
= Fnext_window (swindow
, Qlambda
, Qnil
);;
1539 /* If we get back to the frame's selected window,
1540 it means there was no acceptable alternative,
1541 so we cannot delete. */
1542 if (EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1543 error ("Cannot delete window");
1546 /* If we need to change SWINDOW, do it. */
1547 if (! EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1549 /* If we're about to delete the selected window on the
1550 selected frame, then we should use Fselect_window to select
1551 the new window. On the other hand, if we're about to
1552 delete the selected window on any other frame, we shouldn't do
1553 anything but set the frame's selected_window slot. */
1554 if (EQ (FRAME_SELECTED_WINDOW (f
), selected_window
))
1555 Fselect_window (swindow
, Qnil
);
1557 FRAME_SELECTED_WINDOW (f
) = swindow
;
1561 /* Now we know we can delete this one. */
1562 window_deletion_count
++;
1565 /* tem is null for dummy parent windows
1566 (which have inferiors but not any contents themselves) */
1570 unchain_marker (XMARKER (p
->pointm
));
1571 unchain_marker (XMARKER (p
->start
));
1574 /* Free window glyph matrices. It is sure that they are allocated
1575 again when ADJUST_GLYPHS is called. Block input so that expose
1576 events and other events that access glyph matrices are not
1577 processed while we are changing them. */
1579 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1583 XWINDOW (tem
)->prev
= p
->prev
;
1587 XWINDOW (tem
)->next
= p
->next
;
1589 if (EQ (window
, par
->hchild
))
1590 par
->hchild
= p
->next
;
1591 if (EQ (window
, par
->vchild
))
1592 par
->vchild
= p
->next
;
1594 /* Find one of our siblings to give our space to. */
1598 /* If p gives its space to its next sibling, that sibling needs
1599 to have its top/left side pulled back to where p's is.
1600 set_window_{height,width} will re-position the sibling's
1603 XWINDOW (sib
)->top_line
= p
->top_line
;
1604 XWINDOW (sib
)->left_col
= p
->left_col
;
1607 /* Stretch that sibling. */
1608 if (!NILP (par
->vchild
))
1609 set_window_height (sib
,
1610 XFASTINT (XWINDOW (sib
)->total_lines
) + XFASTINT (p
->total_lines
),
1612 if (!NILP (par
->hchild
))
1613 set_window_width (sib
,
1614 XFASTINT (XWINDOW (sib
)->total_cols
) + XFASTINT (p
->total_cols
),
1617 /* If parent now has only one child,
1618 put the child into the parent's place. */
1622 if (NILP (XWINDOW (tem
)->next
)) {
1623 replace_window (parent
, tem
);
1624 par
= XWINDOW (tem
);
1627 /* Since we may be deleting combination windows, we must make sure that
1628 not only p but all its children have been marked as deleted. */
1629 if (! NILP (p
->hchild
))
1630 delete_all_subwindows (XWINDOW (p
->hchild
));
1631 else if (! NILP (p
->vchild
))
1632 delete_all_subwindows (XWINDOW (p
->vchild
));
1634 /* Mark this window as deleted. */
1635 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1637 if (! NILP (par
->parent
))
1638 par
= XWINDOW (par
->parent
);
1640 /* Check if we have a v/hchild with a v/hchild. In that case remove
1643 if (! NILP (par
->vchild
) && ! NILP (XWINDOW (par
->vchild
)->vchild
))
1645 p
= XWINDOW (par
->vchild
);
1646 par
->vchild
= p
->vchild
;
1649 else if (! NILP (par
->hchild
) && ! NILP (XWINDOW (par
->hchild
)->hchild
))
1651 p
= XWINDOW (par
->hchild
);
1652 par
->hchild
= p
->hchild
;
1660 while (! NILP (tem
)) {
1661 XWINDOW (tem
)->parent
= p
->parent
;
1662 if (NILP (XWINDOW (tem
)->next
))
1664 tem
= XWINDOW (tem
)->next
;
1667 /* The next of the v/hchild we are removing is now the next of the
1668 last child for the v/hchild:
1669 Before v/hchild -> v/hchild -> next1 -> next2
1672 After: v/hchild -> next1 -> next2 -> next3
1674 XWINDOW (tem
)->next
= p
->next
;
1675 if (! NILP (p
->next
))
1676 XWINDOW (p
->next
)->prev
= tem
;
1678 p
->next
= p
->prev
= p
->vchild
= p
->hchild
= p
->buffer
= Qnil
;
1682 /* Adjust glyph matrices. */
1689 /***********************************************************************
1691 ***********************************************************************/
1693 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1694 pointer. This is a callback function for foreach_window, used in
1695 function window_list. */
1698 add_window_to_list (w
, user_data
)
1702 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1704 XSETWINDOW (window
, w
);
1705 *list
= Fcons (window
, *list
);
1710 /* Return a list of all windows, for use by next_window. If
1711 Vwindow_list is a list, return that list. Otherwise, build a new
1712 list, cache it in Vwindow_list, and return that. */
1717 if (!CONSP (Vwindow_list
))
1721 Vwindow_list
= Qnil
;
1722 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1724 Lisp_Object args
[2];
1726 /* We are visiting windows in canonical order, and add
1727 new windows at the front of args[1], which means we
1728 have to reverse this list at the end. */
1730 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1731 args
[0] = Vwindow_list
;
1732 args
[1] = Fnreverse (args
[1]);
1733 Vwindow_list
= Fnconc (2, args
);
1737 return Vwindow_list
;
1741 /* Value is non-zero if WINDOW satisfies the constraints given by
1742 OWINDOW, MINIBUF and ALL_FRAMES.
1744 MINIBUF t means WINDOW may be minibuffer windows.
1745 `lambda' means WINDOW may not be a minibuffer window.
1746 a window means a specific minibuffer window
1748 ALL_FRAMES t means search all frames,
1749 nil means search just current frame,
1750 `visible' means search just visible frames,
1751 0 means search visible and iconified frames,
1752 a window means search the frame that window belongs to,
1753 a frame means consider windows on that frame, only. */
1756 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1757 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1759 struct window
*w
= XWINDOW (window
);
1760 struct frame
*f
= XFRAME (w
->frame
);
1761 int candidate_p
= 1;
1763 if (!BUFFERP (w
->buffer
))
1765 else if (MINI_WINDOW_P (w
)
1766 && (EQ (minibuf
, Qlambda
)
1767 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1769 /* If MINIBUF is `lambda' don't consider any mini-windows.
1770 If it is a window, consider only that one. */
1773 else if (EQ (all_frames
, Qt
))
1775 else if (NILP (all_frames
))
1777 xassert (WINDOWP (owindow
));
1778 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1780 else if (EQ (all_frames
, Qvisible
))
1782 FRAME_SAMPLE_VISIBILITY (f
);
1783 candidate_p
= FRAME_VISIBLE_P (f
);
1785 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1787 FRAME_SAMPLE_VISIBILITY (f
);
1788 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1790 else if (WINDOWP (all_frames
))
1791 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1792 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1793 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1794 else if (FRAMEP (all_frames
))
1795 candidate_p
= EQ (all_frames
, w
->frame
);
1801 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1802 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1806 decode_next_window_args (window
, minibuf
, all_frames
)
1807 Lisp_Object
*window
, *minibuf
, *all_frames
;
1810 *window
= selected_window
;
1812 CHECK_LIVE_WINDOW (*window
);
1814 /* MINIBUF nil may or may not include minibuffers. Decide if it
1816 if (NILP (*minibuf
))
1817 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1818 else if (!EQ (*minibuf
, Qt
))
1821 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1822 => count none of them, or a specific minibuffer window (the
1823 active one) to count. */
1825 /* ALL_FRAMES nil doesn't specify which frames to include. */
1826 if (NILP (*all_frames
))
1827 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1828 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1830 else if (EQ (*all_frames
, Qvisible
))
1832 else if (EQ (*all_frames
, make_number (0)))
1834 else if (FRAMEP (*all_frames
))
1836 else if (!EQ (*all_frames
, Qt
))
1839 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1840 search just current frame, `visible' meaning search just visible
1841 frames, 0 meaning search visible and iconified frames, or a
1842 window, meaning search the frame that window belongs to, or a
1843 frame, meaning consider windows on that frame, only. */
1847 /* Return the next or previous window of WINDOW in canonical ordering
1848 of windows. NEXT_P non-zero means return the next window. See the
1849 documentation string of next-window for the meaning of MINIBUF and
1853 next_window (window
, minibuf
, all_frames
, next_p
)
1854 Lisp_Object window
, minibuf
, all_frames
;
1857 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1859 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1860 return the first window on the frame. */
1861 if (FRAMEP (all_frames
)
1862 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1863 return Fframe_first_window (all_frames
);
1869 /* Find WINDOW in the list of all windows. */
1870 list
= Fmemq (window
, window_list ());
1872 /* Scan forward from WINDOW to the end of the window list. */
1874 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1875 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1878 /* Scan from the start of the window list up to WINDOW. */
1880 for (list
= Vwindow_list
;
1881 CONSP (list
) && !EQ (XCAR (list
), window
);
1883 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1887 window
= XCAR (list
);
1891 Lisp_Object candidate
, list
;
1893 /* Scan through the list of windows for candidates. If there are
1894 candidate windows in front of WINDOW, the last one of these
1895 is the one we want. If there are candidates following WINDOW
1896 in the list, again the last one of these is the one we want. */
1898 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1900 if (EQ (XCAR (list
), window
))
1902 if (WINDOWP (candidate
))
1905 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1907 candidate
= XCAR (list
);
1910 if (WINDOWP (candidate
))
1918 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1919 doc
: /* Return next window after WINDOW in canonical ordering of windows.
1920 If omitted, WINDOW defaults to the selected window.
1922 Optional second arg MINIBUF t means count the minibuffer window even
1923 if not active. MINIBUF nil or omitted means count the minibuffer iff
1924 it is active. MINIBUF neither t nor nil means not to count the
1925 minibuffer even if it is active.
1927 Several frames may share a single minibuffer; if the minibuffer
1928 counts, all windows on all frames that share that minibuffer count
1929 too. Therefore, `next-window' can be used to iterate through the
1930 set of windows even when the minibuffer is on another frame. If the
1931 minibuffer does not count, only windows from WINDOW's frame count.
1933 Optional third arg ALL-FRAMES t means include windows on all frames.
1934 ALL-FRAMES nil or omitted means cycle within the frames as specified
1935 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1936 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1937 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1938 Anything else means restrict to WINDOW's frame.
1940 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1941 `next-window' to iterate through the entire cycle of acceptable
1942 windows, eventually ending up back at the window you started with.
1943 `previous-window' traverses the same cycle, in the reverse order. */)
1944 (window
, minibuf
, all_frames
)
1945 Lisp_Object window
, minibuf
, all_frames
;
1947 return next_window (window
, minibuf
, all_frames
, 1);
1951 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1952 doc
: /* Return the window preceding WINDOW in canonical ordering of windows.
1953 If omitted, WINDOW defaults to the selected window.
1955 Optional second arg MINIBUF t means count the minibuffer window even
1956 if not active. MINIBUF nil or omitted means count the minibuffer iff
1957 it is active. MINIBUF neither t nor nil means not to count the
1958 minibuffer even if it is active.
1960 Several frames may share a single minibuffer; if the minibuffer
1961 counts, all windows on all frames that share that minibuffer count
1962 too. Therefore, `previous-window' can be used to iterate through
1963 the set of windows even when the minibuffer is on another frame. If
1964 the minibuffer does not count, only windows from WINDOW's frame count
1966 Optional third arg ALL-FRAMES t means include windows on all frames.
1967 ALL-FRAMES nil or omitted means cycle within the frames as specified
1968 above. ALL-FRAMES = `visible' means include windows on all visible frames.
1969 ALL-FRAMES = 0 means include windows on all visible and iconified frames.
1970 If ALL-FRAMES is a frame, restrict search to windows on that frame.
1971 Anything else means restrict to WINDOW's frame.
1973 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1974 `previous-window' to iterate through the entire cycle of acceptable
1975 windows, eventually ending up back at the window you started with.
1976 `next-window' traverses the same cycle, in the reverse order. */)
1977 (window
, minibuf
, all_frames
)
1978 Lisp_Object window
, minibuf
, all_frames
;
1980 return next_window (window
, minibuf
, all_frames
, 0);
1984 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1985 doc
: /* Select the ARG'th different window on this frame.
1986 All windows on current frame are arranged in a cyclic order.
1987 This command selects the window ARG steps away in that order.
1988 A negative ARG moves in the opposite order. The optional second
1989 argument ALL-FRAMES has the same meaning as in `next-window', which see. */)
1991 Lisp_Object arg
, all_frames
;
1997 window
= selected_window
;
1999 for (i
= XINT (arg
); i
> 0; --i
)
2000 window
= Fnext_window (window
, Qnil
, all_frames
);
2002 window
= Fprevious_window (window
, Qnil
, all_frames
);
2004 Fselect_window (window
, Qnil
);
2009 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
2010 doc
: /* Return a list of windows on FRAME, starting with WINDOW.
2011 FRAME nil or omitted means use the selected frame.
2012 WINDOW nil or omitted means use the selected window.
2013 MINIBUF t means include the minibuffer window, even if it isn't active.
2014 MINIBUF nil or omitted means include the minibuffer window only
2016 MINIBUF neither nil nor t means never include the minibuffer window. */)
2017 (frame
, minibuf
, window
)
2018 Lisp_Object frame
, minibuf
, window
;
2021 window
= FRAMEP (frame
) ? XFRAME (frame
)->selected_window
: selected_window
;
2022 CHECK_WINDOW (window
);
2024 frame
= selected_frame
;
2026 if (!EQ (frame
, XWINDOW (window
)->frame
))
2027 error ("Window is on a different frame");
2029 return window_list_1 (window
, minibuf
, frame
);
2033 /* Return a list of windows in canonical ordering. Arguments are like
2034 for `next-window'. */
2037 window_list_1 (window
, minibuf
, all_frames
)
2038 Lisp_Object window
, minibuf
, all_frames
;
2040 Lisp_Object tail
, list
, rest
;
2042 decode_next_window_args (&window
, &minibuf
, &all_frames
);
2045 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
2046 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
2047 list
= Fcons (XCAR (tail
), list
);
2049 /* Rotate the list to start with WINDOW. */
2050 list
= Fnreverse (list
);
2051 rest
= Fmemq (window
, list
);
2052 if (!NILP (rest
) && !EQ (rest
, list
))
2054 for (tail
= list
; !EQ (XCDR (tail
), rest
); tail
= XCDR (tail
))
2056 XSETCDR (tail
, Qnil
);
2057 list
= nconc2 (rest
, list
);
2064 /* Look at all windows, performing an operation specified by TYPE
2066 If FRAMES is Qt, look at all frames;
2067 Qnil, look at just the selected frame;
2068 Qvisible, look at visible frames;
2069 a frame, just look at windows on that frame.
2070 If MINI is non-zero, perform the operation on minibuffer windows too. */
2075 GET_BUFFER_WINDOW
, /* Arg is buffer */
2076 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
2077 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
2078 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
2080 UNSHOW_BUFFER
, /* Arg is buffer */
2081 REDISPLAY_BUFFER_WINDOWS
, /* Arg is buffer */
2086 window_loop (type
, obj
, mini
, frames
)
2087 enum window_loop type
;
2088 Lisp_Object obj
, frames
;
2091 Lisp_Object window
, windows
, best_window
, frame_arg
;
2093 struct gcpro gcpro1
;
2095 /* If we're only looping through windows on a particular frame,
2096 frame points to that frame. If we're looping through windows
2097 on all frames, frame is 0. */
2098 if (FRAMEP (frames
))
2099 f
= XFRAME (frames
);
2100 else if (NILP (frames
))
2101 f
= SELECTED_FRAME ();
2106 frame_arg
= Qlambda
;
2107 else if (EQ (frames
, make_number (0)))
2109 else if (EQ (frames
, Qvisible
))
2114 /* frame_arg is Qlambda to stick to one frame,
2115 Qvisible to consider all visible frames,
2118 /* Pick a window to start with. */
2122 window
= FRAME_SELECTED_WINDOW (f
);
2124 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
2126 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
2130 for (; CONSP (windows
); windows
= XCDR (windows
))
2134 window
= XCAR (windows
);
2135 w
= XWINDOW (window
);
2137 /* Note that we do not pay attention here to whether the frame
2138 is visible, since Fwindow_list skips non-visible frames if
2139 that is desired, under the control of frame_arg. */
2140 if (!MINI_WINDOW_P (w
)
2141 /* For UNSHOW_BUFFER, we must always consider all windows. */
2142 || type
== UNSHOW_BUFFER
2143 || (mini
&& minibuf_level
> 0))
2146 case GET_BUFFER_WINDOW
:
2147 if (EQ (w
->buffer
, obj
)
2148 /* Don't find any minibuffer window
2149 except the one that is currently in use. */
2150 && (MINI_WINDOW_P (w
)
2151 ? EQ (window
, minibuf_window
)
2154 if (NILP (best_window
))
2155 best_window
= window
;
2156 else if (EQ (window
, selected_window
))
2157 /* For compatibility with 20.x, prefer to return
2159 best_window
= window
;
2163 case GET_LRU_WINDOW
:
2164 /* `obj' is an integer encoding a bitvector.
2165 `obj & 1' means consider only full-width windows.
2166 `obj & 2' means consider also dedicated windows. */
2167 if (((XINT (obj
) & 1) && !WINDOW_FULL_WIDTH_P (w
))
2168 || (!(XINT (obj
) & 2) && !NILP (w
->dedicated
))
2169 /* Minibuffer windows are always ignored. */
2170 || MINI_WINDOW_P (w
))
2172 if (NILP (best_window
)
2173 || (XFASTINT (XWINDOW (best_window
)->use_time
)
2174 > XFASTINT (w
->use_time
)))
2175 best_window
= window
;
2178 case DELETE_OTHER_WINDOWS
:
2179 if (!EQ (window
, obj
))
2180 Fdelete_window (window
);
2183 case DELETE_BUFFER_WINDOWS
:
2184 if (EQ (w
->buffer
, obj
))
2186 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
2188 /* If this window is dedicated, and in a frame of its own,
2190 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2191 && !NILP (w
->dedicated
)
2192 && other_visible_frames (f
))
2194 /* Skip the other windows on this frame.
2195 There might be one, the minibuffer! */
2196 while (CONSP (XCDR (windows
))
2197 && EQ (XWINDOW (XCAR (windows
))->frame
,
2198 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2199 windows
= XCDR (windows
);
2201 /* Now we can safely delete the frame. */
2202 Fdelete_frame (w
->frame
, Qnil
);
2204 else if (NILP (w
->parent
))
2206 /* If we're deleting the buffer displayed in the
2207 only window on the frame, find a new buffer to
2210 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2211 Fset_window_buffer (window
, buffer
, Qnil
);
2212 if (EQ (window
, selected_window
))
2213 Fset_buffer (w
->buffer
);
2216 Fdelete_window (window
);
2220 case GET_LARGEST_WINDOW
:
2221 { /* nil `obj' means to ignore dedicated windows. */
2222 /* Ignore dedicated windows and minibuffers. */
2223 if (MINI_WINDOW_P (w
) || (NILP (obj
) && !NILP (w
->dedicated
)))
2226 if (NILP (best_window
))
2227 best_window
= window
;
2230 struct window
*b
= XWINDOW (best_window
);
2231 if (XFASTINT (w
->total_lines
) * XFASTINT (w
->total_cols
)
2232 > XFASTINT (b
->total_lines
) * XFASTINT (b
->total_cols
))
2233 best_window
= window
;
2239 if (EQ (w
->buffer
, obj
))
2242 struct frame
*f
= XFRAME (w
->frame
);
2244 /* Find another buffer to show in this window. */
2245 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2247 /* If this window is dedicated, and in a frame of its own,
2249 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
2250 && !NILP (w
->dedicated
)
2251 && other_visible_frames (f
))
2253 /* Skip the other windows on this frame.
2254 There might be one, the minibuffer! */
2255 while (CONSP (XCDR (windows
))
2256 && EQ (XWINDOW (XCAR (windows
))->frame
,
2257 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2258 windows
= XCDR (windows
);
2260 /* Now we can safely delete the frame. */
2261 Fdelete_frame (w
->frame
, Qnil
);
2263 else if (!NILP (w
->dedicated
) && !NILP (w
->parent
))
2266 XSETWINDOW (window
, w
);
2267 /* If this window is dedicated and not the only window
2268 in its frame, then kill it. */
2269 Fdelete_window (window
);
2273 /* Otherwise show a different buffer in the window. */
2274 w
->dedicated
= Qnil
;
2275 Fset_window_buffer (window
, buffer
, Qnil
);
2276 if (EQ (window
, selected_window
))
2277 Fset_buffer (w
->buffer
);
2282 case REDISPLAY_BUFFER_WINDOWS
:
2283 if (EQ (w
->buffer
, obj
))
2285 mark_window_display_accurate (window
, 0);
2286 w
->update_mode_line
= Qt
;
2287 XBUFFER (obj
)->prevent_redisplay_optimizations_p
= 1;
2288 ++update_mode_lines
;
2289 best_window
= window
;
2293 /* Check for a window that has a killed buffer. */
2294 case CHECK_ALL_WINDOWS
:
2295 if (! NILP (w
->buffer
)
2296 && NILP (XBUFFER (w
->buffer
)->name
))
2300 case WINDOW_LOOP_UNUSED
:
2309 /* Used for debugging. Abort if any window has a dead buffer. */
2312 check_all_windows ()
2314 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
2317 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 2, 0,
2318 doc
: /* Return the window least recently selected or used for display.
2319 Return a full-width window if possible.
2320 A minibuffer window is never a candidate.
2321 A dedicated window is never a candidate, unless DEDICATED is non-nil,
2322 so if all windows are dedicated, the value is nil.
2323 If optional argument FRAME is `visible', search all visible frames.
2324 If FRAME is 0, search all visible and iconified frames.
2325 If FRAME is t, search all frames.
2326 If FRAME is nil, search only the selected frame.
2327 If FRAME is a frame, search only that frame. */)
2329 Lisp_Object frame
, dedicated
;
2331 register Lisp_Object w
;
2332 /* First try for a window that is full-width */
2333 w
= window_loop (GET_LRU_WINDOW
,
2334 NILP (dedicated
) ? make_number (1) : make_number (3),
2336 if (!NILP (w
) && !EQ (w
, selected_window
))
2338 /* If none of them, try the rest */
2339 return window_loop (GET_LRU_WINDOW
,
2340 NILP (dedicated
) ? make_number (0) : make_number (2),
2344 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 2, 0,
2345 doc
: /* Return the largest window in area.
2346 A minibuffer window is never a candidate.
2347 A dedicated window is never a candidate unless DEDICATED is non-nil,
2348 so if all windows are dedicated, the value is nil.
2349 If optional argument FRAME is `visible', search all visible frames.
2350 If FRAME is 0, search all visible and iconified frames.
2351 If FRAME is t, search all frames.
2352 If FRAME is nil, search only the selected frame.
2353 If FRAME is a frame, search only that frame. */)
2355 Lisp_Object frame
, dedicated
;
2357 return window_loop (GET_LARGEST_WINDOW
, dedicated
, 0,
2361 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
2362 doc
: /* Return a window currently displaying BUFFER, or nil if none.
2363 BUFFER can be a buffer or a buffer name.
2364 If optional argument FRAME is `visible', search all visible frames.
2365 If optional argument FRAME is 0, search all visible and iconified frames.
2366 If FRAME is t, search all frames.
2367 If FRAME is nil, search only the selected frame.
2368 If FRAME is a frame, search only that frame. */)
2370 Lisp_Object buffer
, frame
;
2372 buffer
= Fget_buffer (buffer
);
2373 if (BUFFERP (buffer
))
2374 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
2379 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
2381 doc
: /* Make WINDOW (or the selected window) fill its frame.
2382 Only the frame WINDOW is on is affected.
2383 This function tries to reduce display jumps
2384 by keeping the text previously visible in WINDOW
2385 in the same place on the frame. Doing this depends on
2386 the value of (window-start WINDOW), so if calling this function
2387 in a program gives strange scrolling, make sure the window-start
2388 value is reasonable when this function is called. */)
2397 window
= selected_window
;
2399 CHECK_LIVE_WINDOW (window
);
2400 w
= XWINDOW (window
);
2402 startpos
= marker_position (w
->start
);
2403 top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2405 if (MINI_WINDOW_P (w
) && top
> 0)
2406 error ("Can't expand minibuffer to full frame");
2408 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2410 /* Try to minimize scrolling, by setting the window start to the point
2411 will cause the text at the old window start to be at the same place
2412 on the frame. But don't try to do this if the window start is
2413 outside the visible portion (as might happen when the display is
2414 not current, due to typeahead). */
2415 new_top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2417 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2418 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2420 struct position pos
;
2421 struct buffer
*obuf
= current_buffer
;
2423 Fset_buffer (w
->buffer
);
2424 /* This computation used to temporarily move point, but that can
2425 have unwanted side effects due to text properties. */
2426 pos
= *vmotion (startpos
, -top
, w
);
2428 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2429 w
->window_end_valid
= Qnil
;
2430 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2431 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2433 /* We need to do this, so that the window-scroll-functions
2435 w
->optional_new_start
= Qt
;
2437 set_buffer_internal (obuf
);
2443 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2444 1, 2, "bDelete windows on (buffer): ",
2445 doc
: /* Delete all windows showing BUFFER.
2446 BUFFER must be a buffer or the name of an existing buffer.
2447 Optional second argument FRAME controls which frames are affected.
2448 If optional argument FRAME is `visible', search all visible frames.
2449 If FRAME is 0, search all visible and iconified frames.
2450 If FRAME is nil, search all frames.
2451 If FRAME is t, search only the selected frame.
2452 If FRAME is a frame, search only that frame. */)
2454 Lisp_Object buffer
, frame
;
2456 /* FRAME uses t and nil to mean the opposite of what window_loop
2460 else if (EQ (frame
, Qt
))
2465 buffer
= Fget_buffer (buffer
);
2466 CHECK_BUFFER (buffer
);
2467 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2473 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2474 Sreplace_buffer_in_windows
,
2475 1, 1, "bReplace buffer in windows: ",
2476 doc
: /* Replace BUFFER with some other buffer in all windows showing it.
2477 BUFFER may be a buffer or the name of an existing buffer. */)
2483 buffer
= Fget_buffer (buffer
);
2484 CHECK_BUFFER (buffer
);
2485 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2490 /* Replace BUFFER with some other buffer in all windows
2491 of all frames, even those on other keyboards. */
2494 replace_buffer_in_all_windows (buffer
)
2498 Lisp_Object tail
, frame
;
2500 /* A single call to window_loop won't do the job
2501 because it only considers frames on the current keyboard.
2502 So loop manually over frames, and handle each one. */
2503 FOR_EACH_FRAME (tail
, frame
)
2504 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2506 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2510 /* Set the height of WINDOW and all its inferiors. */
2512 /* The smallest acceptable dimensions for a window. Anything smaller
2513 might crash Emacs. */
2515 #define MIN_SAFE_WINDOW_WIDTH (2)
2516 #define MIN_SAFE_WINDOW_HEIGHT (1)
2518 /* Make sure that window_min_height and window_min_width are
2519 not too small; if they are, set them to safe minima. */
2522 check_min_window_sizes ()
2524 /* Smaller values might permit a crash. */
2525 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2526 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2527 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2528 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2531 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2532 minimum allowable size. */
2535 check_frame_size (frame
, rows
, cols
)
2539 /* For height, we have to see:
2540 how many windows the frame has at minimum (one or two),
2541 and whether it has a menu bar or other special stuff at the top. */
2543 = ((FRAME_MINIBUF_ONLY_P (frame
) || ! FRAME_HAS_MINIBUF_P (frame
))
2544 ? MIN_SAFE_WINDOW_HEIGHT
2545 : 2 * MIN_SAFE_WINDOW_HEIGHT
);
2547 if (FRAME_TOP_MARGIN (frame
) > 0)
2548 min_height
+= FRAME_TOP_MARGIN (frame
);
2550 if (*rows
< min_height
)
2552 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2553 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2557 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2558 check if W's width can be changed, otherwise check W's height.
2559 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2560 siblings, too. If none of the siblings is resizable, WINDOW isn't
2564 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2566 int width_p
, check_siblings_p
;
2571 if (!NILP (w
->hchild
))
2573 c
= XWINDOW (w
->hchild
);
2577 /* A horiz. combination is fixed-width if all of if its
2579 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2580 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2581 fixed_p
= c
== NULL
;
2585 /* A horiz. combination is fixed-height if one of if its
2587 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2588 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2589 fixed_p
= c
!= NULL
;
2592 else if (!NILP (w
->vchild
))
2594 c
= XWINDOW (w
->vchild
);
2598 /* A vert. combination is fixed-width if one of if its
2600 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2601 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2602 fixed_p
= c
!= NULL
;
2606 /* A vert. combination is fixed-height if all of if its
2608 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2609 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2610 fixed_p
= c
== NULL
;
2613 else if (BUFFERP (w
->buffer
))
2615 struct buffer
*old
= current_buffer
;
2618 current_buffer
= XBUFFER (w
->buffer
);
2619 val
= find_symbol_value (Qwindow_size_fixed
);
2620 current_buffer
= old
;
2623 if (!EQ (val
, Qunbound
))
2625 fixed_p
= !NILP (val
);
2628 && ((EQ (val
, Qheight
) && width_p
)
2629 || (EQ (val
, Qwidth
) && !width_p
)))
2633 /* Can't tell if this one is resizable without looking at
2634 siblings. If all siblings are fixed-size this one is too. */
2635 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2639 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2640 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2644 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2645 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2659 /* Return the minimum size of window W, not taking fixed-width windows
2660 into account. WIDTH_P non-zero means return the minimum width,
2661 otherwise return the minimum height. If W is a combination window,
2662 compute the minimum size from the minimum sizes of W's children. */
2665 window_min_size_1 (w
, width_p
)
2672 if (!NILP (w
->hchild
))
2674 c
= XWINDOW (w
->hchild
);
2679 /* The min width of a horizontal combination is
2680 the sum of the min widths of its children. */
2683 size
+= window_min_size_1 (c
, width_p
);
2684 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2689 /* The min height a horizontal combination equals
2690 the maximum of all min height of its children. */
2693 int min_size
= window_min_size_1 (c
, width_p
);
2694 size
= max (min_size
, size
);
2695 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2699 else if (!NILP (w
->vchild
))
2701 c
= XWINDOW (w
->vchild
);
2706 /* The min width of a vertical combination is
2707 the maximum of the min widths of its children. */
2710 int min_size
= window_min_size_1 (c
, width_p
);
2711 size
= max (min_size
, size
);
2712 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2717 /* The min height of a vertical combination equals
2718 the sum of the min height of its children. */
2721 size
+= window_min_size_1 (c
, width_p
);
2722 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2729 size
= max (window_min_width
,
2730 (MIN_SAFE_WINDOW_WIDTH
2731 + WINDOW_FRINGE_COLS (w
)
2732 + WINDOW_SCROLL_BAR_COLS (w
)));
2735 if (MINI_WINDOW_P (w
)
2736 || (!WINDOW_WANTS_MODELINE_P (w
)
2737 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2740 size
= window_min_height
;
2748 /* Return the minimum size of window W, taking fixed-size windows into
2749 account. WIDTH_P non-zero means return the minimum width,
2750 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2751 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2752 unless FIXED is null. */
2755 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2757 int width_p
, ignore_fixed_p
, *fixed
;
2764 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2770 size
= width_p
? XFASTINT (w
->total_cols
) : XFASTINT (w
->total_lines
);
2772 size
= window_min_size_1 (w
, width_p
);
2778 /* Adjust the margins of window W if text area is too small.
2779 Return 1 if window width is ok after adjustment; 0 if window
2780 is still too narrow. */
2783 adjust_window_margins (w
)
2786 int box_cols
= (WINDOW_TOTAL_COLS (w
)
2787 - WINDOW_FRINGE_COLS (w
)
2788 - WINDOW_SCROLL_BAR_COLS (w
));
2789 int margin_cols
= (WINDOW_LEFT_MARGIN_COLS (w
)
2790 + WINDOW_RIGHT_MARGIN_COLS (w
));
2792 if (box_cols
- margin_cols
>= MIN_SAFE_WINDOW_WIDTH
)
2795 if (margin_cols
< 0 || box_cols
< MIN_SAFE_WINDOW_WIDTH
)
2798 /* Window's text area is too narrow, but reducing the window
2799 margins will fix that. */
2800 margin_cols
= box_cols
- MIN_SAFE_WINDOW_WIDTH
;
2801 if (WINDOW_RIGHT_MARGIN_COLS (w
) > 0)
2803 if (WINDOW_LEFT_MARGIN_COLS (w
) > 0)
2804 w
->left_margin_cols
= w
->right_margin_cols
2805 = make_number (margin_cols
/2);
2807 w
->right_margin_cols
= make_number (margin_cols
);
2810 w
->left_margin_cols
= make_number (margin_cols
);
2814 /* Calculate new sizes for windows in the list FORWARD when the window size
2815 goes from TOTAL to SIZE. TOTAL must be greater than SIZE.
2816 The number of windows in FORWARD is NCHILDREN, and the number that
2817 can shrink is SHRINKABLE.
2818 The minimum size a window can have is MIN_SIZE.
2819 If we are shrinking fixed windows, RESIZE_FIXED_P is non-zero.
2820 If we are shrinking columns, WIDTH_P is non-zero, otherwise we are
2823 This function returns an allocated array of new sizes that the caller
2824 must free. The size -1 means the window is fixed and RESIZE_FIXED_P
2825 is zero. Array index 0 refers to the first window in FORWARD, 1 to
2826 the second, and so on.
2828 This function tries to keep windows at least at the minimum size
2829 and resize other windows before it resizes any window to zero (i.e.
2830 delete that window).
2832 Windows are resized proportional to their size, so bigger windows
2833 shrink more than smaller windows. */
2835 shrink_windows (total
, size
, nchildren
, shrinkable
,
2836 min_size
, resize_fixed_p
, forward
, width_p
)
2837 int total
, size
, nchildren
, shrinkable
, min_size
;
2838 int resize_fixed_p
, width_p
;
2839 Lisp_Object forward
;
2841 int available_resize
= 0;
2845 int smallest
= total
;
2846 int total_removed
= 0;
2847 int total_shrink
= total
- size
;
2850 new_sizes
= xmalloc (sizeof (*new_sizes
) * nchildren
);
2852 for (i
= 0, child
= forward
; !NILP (child
); child
= c
->next
, ++i
)
2856 c
= XWINDOW (child
);
2857 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
2859 if (! resize_fixed_p
&& window_fixed_size_p (c
, width_p
, 0))
2863 new_sizes
[i
] = child_size
;
2864 if (child_size
> min_size
)
2865 available_resize
+= child_size
- min_size
;
2868 /* We might need to shrink some windows to zero. Find the smallest
2869 windows and set them to 0 until we can fulfil the new size. */
2871 while (shrinkable
> 1 && size
+ available_resize
< total
)
2873 for (i
= 0; i
< nchildren
; ++i
)
2874 if (new_sizes
[i
] > 0 && smallest
> new_sizes
[i
])
2875 smallest
= new_sizes
[i
];
2877 for (i
= 0; i
< nchildren
; ++i
)
2878 if (new_sizes
[i
] == smallest
)
2880 /* Resize this window down to zero. */
2882 if (smallest
> min_size
)
2883 available_resize
-= smallest
- min_size
;
2884 available_resize
+= smallest
;
2886 total_removed
+= smallest
;
2888 /* We don't know what the smallest is now. */
2891 /* Out of for, just remove one window at the time and
2892 check again if we have enough space. */
2897 /* Now, calculate the new sizes. Try to shrink each window
2898 proportional to its size. */
2899 for (i
= 0; i
< nchildren
; ++i
)
2901 if (new_sizes
[i
] > min_size
)
2903 int to_shrink
= total_shrink
*new_sizes
[i
]/total
;
2904 if (new_sizes
[i
] - to_shrink
< min_size
)
2905 to_shrink
= new_sizes
[i
] - min_size
;
2906 new_sizes
[i
] -= to_shrink
;
2907 total_removed
+= to_shrink
;
2911 /* Any reminder due to rounding, we just subtract from windows
2912 that are left and still can be shrunk. */
2913 while (total_shrink
> total_removed
)
2915 int nonzero_sizes
= 0;
2916 int nonzero_idx
= -1;
2918 for (i
= 0; i
< nchildren
; ++i
)
2919 if (new_sizes
[i
] > 0)
2925 for (i
= 0; i
< nchildren
; ++i
)
2926 if (new_sizes
[i
] > min_size
)
2931 /* Out of for, just shrink one window at the time and
2932 check again if we have enough space. */
2937 /* Special case, only one window left. */
2938 if (nonzero_sizes
== 1)
2942 /* Any surplus due to rounding, we add to windows that are left. */
2943 while (total_shrink
< total_removed
)
2945 for (i
= 0; i
< nchildren
; ++i
)
2947 if (new_sizes
[i
] != 0 && total_shrink
< total_removed
)
2959 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2960 WINDOW's width. Resize WINDOW's children, if any, so that they
2961 keep their proportionate size relative to WINDOW.
2963 If FIRST_ONLY is 1, change only the first of WINDOW's children when
2964 they are in series. If LAST_ONLY is 1, change only the last of
2965 WINDOW's children when they are in series.
2967 Propagate WINDOW's top or left edge position to children. Delete
2968 windows that become too small unless NODELETE_P is non-zero.
2970 If NODELETE_P is 2, that means we do delete windows that are
2971 too small, even if they were too small before! */
2974 size_window (window
, size
, width_p
, nodelete_p
, first_only
, last_only
)
2976 int size
, width_p
, nodelete_p
;
2977 int first_only
, last_only
;
2979 struct window
*w
= XWINDOW (window
);
2981 Lisp_Object child
, *forward
, *sideward
;
2982 int old_size
, min_size
, safe_min_size
;
2984 /* We test nodelete_p != 2 and nodelete_p != 1 below, so it
2985 seems like it's too soon to do this here. ++KFS. */
2986 if (nodelete_p
== 2)
2989 check_min_window_sizes ();
2990 size
= max (0, size
);
2992 /* If the window has been "too small" at one point,
2993 don't delete it for being "too small" in the future.
2994 Preserve it as long as that is at all possible. */
2997 old_size
= WINDOW_TOTAL_COLS (w
);
2998 min_size
= window_min_width
;
2999 /* Ensure that there is room for the scroll bar and fringes!
3000 We may reduce display margins though. */
3001 safe_min_size
= (MIN_SAFE_WINDOW_WIDTH
3002 + WINDOW_FRINGE_COLS (w
)
3003 + WINDOW_SCROLL_BAR_COLS (w
));
3007 old_size
= XINT (w
->total_lines
);
3008 min_size
= window_min_height
;
3009 safe_min_size
= MIN_SAFE_WINDOW_HEIGHT
;
3012 if (old_size
< min_size
&& nodelete_p
!= 2)
3013 w
->too_small_ok
= Qt
;
3015 /* Maybe delete WINDOW if it's too small. */
3016 if (nodelete_p
!= 1 && !NILP (w
->parent
))
3018 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
3019 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
3020 if (min_size
< safe_min_size
)
3021 min_size
= safe_min_size
;
3022 if (size
< min_size
)
3024 delete_window (window
);
3029 /* Set redisplay hints. */
3030 w
->last_modified
= make_number (0);
3031 w
->last_overlay_modified
= make_number (0);
3032 windows_or_buffers_changed
++;
3033 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
3037 sideward
= &w
->vchild
;
3038 forward
= &w
->hchild
;
3039 w
->total_cols
= make_number (size
);
3040 adjust_window_margins (w
);
3044 sideward
= &w
->hchild
;
3045 forward
= &w
->vchild
;
3046 w
->total_lines
= make_number (size
);
3047 w
->orig_total_lines
= Qnil
;
3050 if (!NILP (*sideward
))
3052 /* We have a chain of parallel siblings whose size should all change. */
3053 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
3055 c
= XWINDOW (child
);
3057 c
->left_col
= w
->left_col
;
3059 c
->top_line
= w
->top_line
;
3060 size_window (child
, size
, width_p
, nodelete_p
,
3061 first_only
, last_only
);
3064 else if (!NILP (*forward
) && last_only
)
3066 /* Change the last in a series of siblings. */
3067 Lisp_Object last_child
;
3070 for (child
= *forward
; !NILP (child
); child
= c
->next
)
3072 c
= XWINDOW (child
);
3076 child_size
= XINT (width_p
? c
->total_cols
: c
->total_lines
);
3077 size_window (last_child
,
3078 size
- old_size
+ child_size
,
3079 width_p
, nodelete_p
, first_only
, last_only
);
3081 else if (!NILP (*forward
) && first_only
)
3083 /* Change the first in a series of siblings. */
3087 c
= XWINDOW (child
);
3090 c
->left_col
= w
->left_col
;
3092 c
->top_line
= w
->top_line
;
3094 child_size
= XINT (width_p
? c
->total_cols
: c
->total_lines
);
3096 size
- old_size
+ child_size
,
3097 width_p
, nodelete_p
, first_only
, last_only
);
3099 else if (!NILP (*forward
))
3101 int fixed_size
, each
, extra
, n
;
3102 int resize_fixed_p
, nfixed
;
3103 int last_pos
, first_pos
, nchildren
, total
;
3104 int *new_sizes
= NULL
;
3106 /* Determine the fixed-size portion of this window, and the
3107 number of child windows. */
3108 fixed_size
= nchildren
= nfixed
= total
= 0;
3109 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
3113 c
= XWINDOW (child
);
3114 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
3115 total
+= child_size
;
3117 if (window_fixed_size_p (c
, width_p
, 0))
3119 fixed_size
+= child_size
;
3124 /* If the new size is smaller than fixed_size, or if there
3125 aren't any resizable windows, allow resizing fixed-size
3127 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
3129 /* Compute how many lines/columns to add/remove to each child. The
3130 value of extra takes care of rounding errors. */
3131 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
3132 if (size
< total
&& n
> 1)
3133 new_sizes
= shrink_windows (total
, size
, nchildren
, n
, min_size
,
3134 resize_fixed_p
, *forward
, width_p
);
3137 each
= (size
- total
) / n
;
3138 extra
= (size
- total
) - n
* each
;
3141 /* Compute new children heights and edge positions. */
3142 first_pos
= width_p
? XINT (w
->left_col
) : XINT (w
->top_line
);
3143 last_pos
= first_pos
;
3144 for (n
= 0, child
= *forward
; !NILP (child
); child
= c
->next
, ++n
)
3146 int new_size
, old_size
;
3148 c
= XWINDOW (child
);
3149 old_size
= width_p
? XFASTINT (c
->total_cols
) : XFASTINT (c
->total_lines
);
3150 new_size
= old_size
;
3152 /* The top or left edge position of this child equals the
3153 bottom or right edge of its predecessor. */
3155 c
->left_col
= make_number (last_pos
);
3157 c
->top_line
= make_number (last_pos
);
3159 /* If this child can be resized, do it. */
3160 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
3162 new_size
= new_sizes
? new_sizes
[n
] : old_size
+ each
+ extra
;
3166 /* Set new height. Note that size_window also propagates
3167 edge positions to children, so it's not a no-op if we
3168 didn't change the child's size. */
3169 size_window (child
, new_size
, width_p
, 1, first_only
, last_only
);
3171 /* Remember the bottom/right edge position of this child; it
3172 will be used to set the top/left edge of the next child. */
3173 last_pos
+= new_size
;
3176 if (new_sizes
) xfree (new_sizes
);
3178 /* We should have covered the parent exactly with child windows. */
3179 xassert (size
== last_pos
- first_pos
);
3181 /* Now delete any children that became too small. */
3183 for (child
= *forward
; !NILP (child
); child
= c
->next
)
3186 c
= XWINDOW (child
);
3187 child_size
= width_p
? XINT (c
->total_cols
) : XINT (c
->total_lines
);
3188 size_window (child
, child_size
, width_p
, 2, first_only
, last_only
);
3193 /* Set WINDOW's height to HEIGHT, and recursively change the height of
3194 WINDOW's children. NODELETE non-zero means don't delete windows
3195 that become too small in the process. (The caller should check
3196 later and do so if appropriate.) */
3199 set_window_height (window
, height
, nodelete
)
3204 size_window (window
, height
, 0, nodelete
, 0, 0);
3208 /* Set WINDOW's width to WIDTH, and recursively change the width of
3209 WINDOW's children. NODELETE non-zero means don't delete windows
3210 that become too small in the process. (The caller should check
3211 later and do so if appropriate.) */
3214 set_window_width (window
, width
, nodelete
)
3219 size_window (window
, width
, 1, nodelete
, 0, 0);
3222 /* Change window heights in windows rooted in WINDOW by N lines. */
3225 change_window_heights (window
, n
)
3229 struct window
*w
= XWINDOW (window
);
3231 XSETFASTINT (w
->top_line
, XFASTINT (w
->top_line
) + n
);
3232 XSETFASTINT (w
->total_lines
, XFASTINT (w
->total_lines
) - n
);
3234 if (INTEGERP (w
->orig_top_line
))
3235 XSETFASTINT (w
->orig_top_line
, XFASTINT (w
->orig_top_line
) + n
);
3236 if (INTEGERP (w
->orig_total_lines
))
3237 XSETFASTINT (w
->orig_total_lines
, XFASTINT (w
->orig_total_lines
) - n
);
3239 /* Handle just the top child in a vertical split. */
3240 if (!NILP (w
->vchild
))
3241 change_window_heights (w
->vchild
, n
);
3243 /* Adjust all children in a horizontal split. */
3244 for (window
= w
->hchild
; !NILP (window
); window
= w
->next
)
3246 w
= XWINDOW (window
);
3247 change_window_heights (window
, n
);
3252 int window_select_count
;
3255 Fset_window_buffer_unwind (obuf
)
3262 EXFUN (Fset_window_fringes
, 4);
3263 EXFUN (Fset_window_scroll_bars
, 4);
3265 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
3266 means it's allowed to run hooks. See make_frame for a case where
3267 it's not allowed. KEEP_MARGINS_P non-zero means that the current
3268 margins, fringes, and scroll-bar settings of the window are not
3269 reset from the buffer's local settings. */
3272 set_window_buffer (window
, buffer
, run_hooks_p
, keep_margins_p
)
3273 Lisp_Object window
, buffer
;
3274 int run_hooks_p
, keep_margins_p
;
3276 struct window
*w
= XWINDOW (window
);
3277 struct buffer
*b
= XBUFFER (buffer
);
3278 int count
= SPECPDL_INDEX ();
3282 if (EQ (window
, selected_window
))
3283 b
->last_selected_window
= window
;
3285 /* Let redisplay errors through. */
3286 b
->display_error_modiff
= 0;
3288 /* Update time stamps of buffer display. */
3289 if (INTEGERP (b
->display_count
))
3290 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
3291 b
->display_time
= Fcurrent_time ();
3293 XSETFASTINT (w
->window_end_pos
, 0);
3294 XSETFASTINT (w
->window_end_vpos
, 0);
3295 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
3296 w
->window_end_valid
= Qnil
;
3297 w
->hscroll
= w
->min_hscroll
= make_number (0);
3299 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
3300 set_marker_restricted (w
->start
,
3301 make_number (b
->last_window_start
),
3303 w
->start_at_line_beg
= Qnil
;
3304 w
->force_start
= Qnil
;
3305 XSETFASTINT (w
->last_modified
, 0);
3306 XSETFASTINT (w
->last_overlay_modified
, 0);
3307 windows_or_buffers_changed
++;
3309 /* We must select BUFFER for running the window-scroll-functions.
3310 If WINDOW is selected, switch permanently.
3311 Otherwise, switch but go back to the ambient buffer afterward. */
3312 if (EQ (window
, selected_window
))
3313 Fset_buffer (buffer
);
3314 /* We can't check ! NILP (Vwindow_scroll_functions) here
3315 because that might itself be a local variable. */
3316 else if (window_initialized
)
3318 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
3319 Fset_buffer (buffer
);
3322 if (!keep_margins_p
)
3324 /* Set left and right marginal area width etc. from buffer. */
3326 /* This may call adjust_window_margins three times, so
3327 temporarily disable window margins. */
3328 Lisp_Object save_left
= w
->left_margin_cols
;
3329 Lisp_Object save_right
= w
->right_margin_cols
;
3331 w
->left_margin_cols
= w
->right_margin_cols
= Qnil
;
3333 Fset_window_fringes (window
,
3334 b
->left_fringe_width
, b
->right_fringe_width
,
3335 b
->fringes_outside_margins
);
3337 Fset_window_scroll_bars (window
,
3338 b
->scroll_bar_width
,
3339 b
->vertical_scroll_bar_type
, Qnil
);
3341 w
->left_margin_cols
= save_left
;
3342 w
->right_margin_cols
= save_right
;
3344 Fset_window_margins (window
,
3345 b
->left_margin_cols
, b
->right_margin_cols
);
3350 if (! NILP (Vwindow_scroll_functions
))
3351 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
3352 Fmarker_position (w
->start
));
3354 if (! NILP (Vwindow_configuration_change_hook
)
3355 && ! NILP (Vrun_hooks
))
3356 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3359 unbind_to (count
, Qnil
);
3363 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 3, 0,
3364 doc
: /* Make WINDOW display BUFFER as its contents.
3365 BUFFER can be a buffer or the name of an existing buffer.
3366 Optional third arg KEEP-MARGINS non-nil means that WINDOW's current
3367 display margins, fringe widths, and scroll bar settings are maintained;
3368 the default is to reset these from BUFFER's local settings or the frame
3371 This function runs the hook `window-scroll-functions'. */)
3372 (window
, buffer
, keep_margins
)
3373 register Lisp_Object window
, buffer
, keep_margins
;
3375 register Lisp_Object tem
;
3376 register struct window
*w
= decode_window (window
);
3378 XSETWINDOW (window
, w
);
3379 buffer
= Fget_buffer (buffer
);
3380 CHECK_BUFFER (buffer
);
3382 if (NILP (XBUFFER (buffer
)->name
))
3383 error ("Attempt to display deleted buffer");
3387 error ("Window is deleted");
3388 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
3389 is first being set up. */
3391 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
3392 error ("Window is dedicated to `%s'",
3393 SDATA (XBUFFER (tem
)->name
));
3398 set_window_buffer (window
, buffer
, 1, !NILP (keep_margins
));
3402 /* Note that selected_window can be nil
3403 when this is called from Fset_window_configuration. */
3405 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 2, 0,
3406 doc
: /* Select WINDOW. Most editing will apply to WINDOW's buffer.
3407 If WINDOW is not already selected, make WINDOW's buffer current
3408 and make WINDOW the frame's selected window. Return WINDOW.
3409 Optional second arg NORECORD non-nil means
3410 do not put this buffer at the front of the list of recently selected ones.
3412 Note that the main editor command loop
3413 selects the buffer of the selected window before each command. */)
3415 register Lisp_Object window
, norecord
;
3417 register struct window
*w
;
3418 register struct window
*ow
;
3421 CHECK_LIVE_WINDOW (window
);
3423 w
= XWINDOW (window
);
3424 w
->frozen_window_start_p
= 0;
3426 ++window_select_count
;
3427 XSETFASTINT (w
->use_time
, window_select_count
);
3428 if (EQ (window
, selected_window
))
3431 /* Store the current buffer's actual point into the
3432 old selected window. It belongs to that window,
3433 and when the window is not selected, must be in the window. */
3434 if (!NILP (selected_window
))
3436 ow
= XWINDOW (selected_window
);
3437 if (! NILP (ow
->buffer
))
3438 set_marker_both (ow
->pointm
, ow
->buffer
,
3439 BUF_PT (XBUFFER (ow
->buffer
)),
3440 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
3443 selected_window
= window
;
3444 sf
= SELECTED_FRAME ();
3445 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
3447 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
3448 /* Use this rather than Fhandle_switch_frame
3449 so that FRAME_FOCUS_FRAME is moved appropriately as we
3450 move around in the state where a minibuffer in a separate
3452 Fselect_frame (WINDOW_FRAME (w
));
3455 sf
->selected_window
= window
;
3457 if (NILP (norecord
))
3458 record_buffer (w
->buffer
);
3459 Fset_buffer (w
->buffer
);
3461 XBUFFER (w
->buffer
)->last_selected_window
= window
;
3463 /* Go to the point recorded in the window.
3464 This is important when the buffer is in more
3465 than one window. It also matters when
3466 redisplay_window has altered point after scrolling,
3467 because it makes the change only in the window. */
3469 register int new_point
= marker_position (w
->pointm
);
3470 if (new_point
< BEGV
)
3472 else if (new_point
> ZV
)
3478 windows_or_buffers_changed
++;
3483 select_window_norecord (window
)
3486 return Fselect_window (window
, Qt
);
3489 /* Deiconify the frame containing the window WINDOW,
3490 unless it is the selected frame;
3493 The reason for the exception for the selected frame
3494 is that it seems better not to change the selected frames visibility
3495 merely because of displaying a different buffer in it.
3496 The deiconification is useful when a buffer gets shown in
3497 another frame that you were not using lately. */
3500 display_buffer_1 (window
)
3503 Lisp_Object frame
= XWINDOW (window
)->frame
;
3504 FRAME_PTR f
= XFRAME (frame
);
3506 FRAME_SAMPLE_VISIBILITY (f
);
3508 if (EQ (frame
, selected_frame
))
3509 ; /* Assume the selected frame is already visible enough. */
3510 else if (minibuf_level
> 0
3511 && MINI_WINDOW_P (XWINDOW (selected_window
))
3512 && WINDOW_LIVE_P (minibuf_selected_window
)
3513 && EQ (frame
, WINDOW_FRAME (XWINDOW (minibuf_selected_window
))))
3514 ; /* Assume the frame from which we invoked the minibuffer is visible. */
3517 if (FRAME_ICONIFIED_P (f
))
3518 Fmake_frame_visible (frame
);
3519 else if (FRAME_VISIBLE_P (f
))
3520 Fraise_frame (frame
);
3526 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
3527 doc
: /* Returns non-nil if a buffer named BUFFER-NAME gets a special frame.
3528 If the value is t, `display-buffer' or `pop-to-buffer' would create a
3529 special frame for that buffer using the default frame parameters.
3531 If the value is a list, it is a list of frame parameters that would be used
3532 to make a frame for that buffer.
3533 The variables `special-display-buffer-names'
3534 and `special-display-regexps' control this. */)
3536 Lisp_Object buffer_name
;
3540 CHECK_STRING (buffer_name
);
3542 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
3546 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
3550 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3552 Lisp_Object car
= XCAR (tem
);
3554 && fast_string_match (car
, buffer_name
) >= 0)
3556 else if (CONSP (car
)
3557 && STRINGP (XCAR (car
))
3558 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3564 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
3565 doc
: /* Returns non-nil if a buffer named BUFFER-NAME would use the same window.
3566 More precisely, if `display-buffer' or `pop-to-buffer' would display
3567 that buffer in the selected window rather than (as usual) in some other window.
3568 See `same-window-buffer-names' and `same-window-regexps'. */)
3570 Lisp_Object buffer_name
;
3574 CHECK_STRING (buffer_name
);
3576 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
3580 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
3584 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
3586 Lisp_Object car
= XCAR (tem
);
3588 && fast_string_match (car
, buffer_name
) >= 0)
3590 else if (CONSP (car
)
3591 && STRINGP (XCAR (car
))
3592 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
3598 /* Use B so the default is (other-buffer). */
3599 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
3600 "BDisplay buffer: \nP",
3601 doc
: /* Make BUFFER appear in some window but don't select it.
3602 BUFFER must be the name of an existing buffer, or, when called from Lisp,
3604 If BUFFER is shown already in some window, just use that one,
3605 unless the window is the selected window and the optional second
3606 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).
3607 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.
3608 Returns the window displaying BUFFER.
3609 If `display-buffer-reuse-frames' is non-nil, and another frame is currently
3610 displaying BUFFER, then simply raise that frame.
3612 The variables `special-display-buffer-names',
3613 `special-display-regexps', `same-window-buffer-names', and
3614 `same-window-regexps' customize how certain buffer names are handled.
3615 The latter two take effect only if NOT-THIS-WINDOW is nil.
3617 If optional argument FRAME is `visible', search all visible frames.
3618 If FRAME is 0, search all visible and iconified frames.
3619 If FRAME is t, search all frames.
3620 If FRAME is a frame, search only that frame.
3621 If FRAME is nil, search only the selected frame
3622 (actually the last nonminibuffer frame),
3623 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,
3624 which means search visible and iconified frames.
3626 If a full-width window on a splittable frame is available to display
3627 the buffer, it may be split, subject to the value of the variable
3628 `split-height-threshold'.
3630 If `even-window-heights' is non-nil, window heights will be evened out
3631 if displaying the buffer causes two vertically adjacent windows to be
3633 (buffer
, not_this_window
, frame
)
3634 register Lisp_Object buffer
, not_this_window
, frame
;
3636 register Lisp_Object window
, tem
, swp
;
3640 buffer
= Fget_buffer (buffer
);
3641 CHECK_BUFFER (buffer
);
3643 if (!NILP (Vdisplay_buffer_function
))
3644 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
3646 if (NILP (not_this_window
)
3647 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
3648 return display_buffer_1 (selected_window
);
3650 /* See if the user has specified this buffer should appear
3651 in the selected window. */
3652 if (NILP (not_this_window
))
3654 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
3655 if (!NILP (swp
) && !no_switch_window (selected_window
))
3657 Fswitch_to_buffer (buffer
, Qnil
);
3658 return display_buffer_1 (selected_window
);
3662 /* If the user wants pop-up-frames or display-buffer-reuse-frames,
3663 look for a window showing BUFFER on any visible or iconified frame.
3664 Otherwise search only the current frame. */
3667 else if (pop_up_frames
3668 || display_buffer_reuse_frames
3669 || last_nonminibuf_frame
== 0)
3670 XSETFASTINT (tem
, 0);
3672 XSETFRAME (tem
, last_nonminibuf_frame
);
3674 window
= Fget_buffer_window (buffer
, tem
);
3676 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
3677 return display_buffer_1 (window
);
3679 /* Certain buffer names get special handling. */
3680 if (!NILP (Vspecial_display_function
) && NILP (swp
))
3682 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
3684 return call1 (Vspecial_display_function
, buffer
);
3686 return call2 (Vspecial_display_function
, buffer
, tem
);
3689 /* If there are no frames open that have more than a minibuffer,
3690 we need to create a new frame. */
3691 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
3693 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3694 Fset_window_buffer (window
, buffer
, Qnil
);
3695 return display_buffer_1 (window
);
3698 f
= SELECTED_FRAME ();
3700 || FRAME_MINIBUF_ONLY_P (f
)
3701 /* If the current frame is a special display frame,
3702 don't try to reuse its windows. */
3703 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
3708 if (FRAME_MINIBUF_ONLY_P (f
))
3709 XSETFRAME (frames
, last_nonminibuf_frame
);
3710 /* Don't try to create a window if we would get an error. */
3711 if (split_height_threshold
< window_min_height
<< 1)
3712 split_height_threshold
= window_min_height
<< 1;
3714 /* Note that both Fget_largest_window and Fget_lru_window
3715 ignore minibuffers and dedicated windows.
3716 This means they can return nil. */
3718 /* If the frame we would try to split cannot be split,
3719 try other frames. */
3720 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
3722 /* Try visible frames first. */
3723 window
= Fget_largest_window (Qvisible
, Qt
);
3724 /* If that didn't work, try iconified frames. */
3726 window
= Fget_largest_window (make_number (0), Qt
);
3727 #if 0 /* Don't try windows on other displays. */
3729 window
= Fget_largest_window (Qt
, Qt
);
3733 window
= Fget_largest_window (frames
, Qt
);
3735 /* If we got a tall enough full-width window that can be split,
3738 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3739 && window_height (window
) >= split_height_threshold
3740 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
3741 window
= Fsplit_window (window
, Qnil
, Qnil
);
3744 Lisp_Object upper
, lower
, other
;
3746 window
= Fget_lru_window (frames
, Qt
);
3747 /* If the LRU window is selected, and big enough,
3748 and can be split, split it. */
3750 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3751 && (EQ (window
, selected_window
)
3752 || EQ (XWINDOW (window
)->parent
, Qnil
))
3753 && window_height (window
) >= window_min_height
<< 1)
3754 window
= Fsplit_window (window
, Qnil
, Qnil
);
3756 window
= Fget_lru_window (frames
, Qnil
);
3757 /* If Fget_lru_window returned nil, try other approaches. */
3759 /* Try visible frames first. */
3761 window
= Fget_buffer_window (buffer
, Qvisible
);
3763 window
= Fget_largest_window (Qvisible
, Qnil
);
3764 /* If that didn't work, try iconified frames. */
3766 window
= Fget_buffer_window (buffer
, make_number (0));
3768 window
= Fget_largest_window (make_number (0), Qnil
);
3770 #if 0 /* Don't try frames on other displays. */
3772 window
= Fget_buffer_window (buffer
, Qt
);
3774 window
= Fget_largest_window (Qt
, Qnil
);
3776 /* As a last resort, make a new frame. */
3778 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3779 /* If window appears above or below another,
3780 even out their heights. */
3781 other
= upper
= lower
= Qnil
;
3782 if (!NILP (XWINDOW (window
)->prev
))
3783 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3784 if (!NILP (XWINDOW (window
)->next
))
3785 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3787 && !NILP (Veven_window_heights
)
3788 /* Check that OTHER and WINDOW are vertically arrayed. */
3789 && !EQ (XWINDOW (other
)->top_line
, XWINDOW (window
)->top_line
)
3790 && (XFASTINT (XWINDOW (other
)->total_lines
)
3791 > XFASTINT (XWINDOW (window
)->total_lines
)))
3793 int total
= (XFASTINT (XWINDOW (other
)->total_lines
)
3794 + XFASTINT (XWINDOW (window
)->total_lines
));
3795 enlarge_window (upper
,
3796 total
/ 2 - XFASTINT (XWINDOW (upper
)->total_lines
),
3802 window
= Fget_lru_window (Qnil
, Qnil
);
3804 Fset_window_buffer (window
, buffer
, Qnil
);
3805 return display_buffer_1 (window
);
3809 DEFUN ("force-window-update", Fforce_window_update
, Sforce_window_update
,
3811 doc
: /* Force all windows to be updated on next redisplay.
3812 If optional arg OBJECT is a window, force redisplay of that window only.
3813 If OBJECT is a buffer or buffer name, force redisplay of all windows
3814 displaying that buffer. */)
3820 windows_or_buffers_changed
++;
3821 update_mode_lines
++;
3825 if (WINDOWP (object
))
3827 struct window
*w
= XWINDOW (object
);
3828 mark_window_display_accurate (object
, 0);
3829 w
->update_mode_line
= Qt
;
3830 if (BUFFERP (w
->buffer
))
3831 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
3832 ++update_mode_lines
;
3836 if (STRINGP (object
))
3837 object
= Fget_buffer (object
);
3838 if (BUFFERP (object
) && !NILP (XBUFFER (object
)->name
))
3840 /* Walk all windows looking for buffer, and force update
3841 of each of those windows. */
3843 object
= window_loop (REDISPLAY_BUFFER_WINDOWS
, object
, 0, Qvisible
);
3844 return NILP (object
) ? Qnil
: Qt
;
3847 /* If nothing suitable was found, just return.
3848 We could signal an error, but this feature will typically be used
3849 asynchronously in timers or process sentinels, so we don't. */
3855 temp_output_buffer_show (buf
)
3856 register Lisp_Object buf
;
3858 register struct buffer
*old
= current_buffer
;
3859 register Lisp_Object window
;
3860 register struct window
*w
;
3862 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3865 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3869 #if 0 /* rms: there should be no reason for this. */
3870 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3872 set_buffer_internal (old
);
3874 if (!NILP (Vtemp_buffer_show_function
))
3875 call1 (Vtemp_buffer_show_function
, buf
);
3878 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3880 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3881 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3882 Vminibuf_scroll_window
= window
;
3883 w
= XWINDOW (window
);
3884 XSETFASTINT (w
->hscroll
, 0);
3885 XSETFASTINT (w
->min_hscroll
, 0);
3886 set_marker_restricted_both (w
->start
, buf
, BEG
, BEG
);
3887 set_marker_restricted_both (w
->pointm
, buf
, BEG
, BEG
);
3889 /* Run temp-buffer-show-hook, with the chosen window selected
3890 and its buffer current. */
3892 if (!NILP (Vrun_hooks
)
3893 && !NILP (Fboundp (Qtemp_buffer_show_hook
))
3894 && !NILP (Fsymbol_value (Qtemp_buffer_show_hook
)))
3896 int count
= SPECPDL_INDEX ();
3897 Lisp_Object prev_window
, prev_buffer
;
3898 prev_window
= selected_window
;
3899 XSETBUFFER (prev_buffer
, old
);
3901 /* Select the window that was chosen, for running the hook.
3902 Note: Both Fselect_window and select_window_norecord may
3903 set-buffer to the buffer displayed in the window,
3904 so we need to save the current buffer. --stef */
3905 record_unwind_protect (Fset_buffer
, prev_buffer
);
3906 record_unwind_protect (select_window_norecord
, prev_window
);
3907 Fselect_window (window
, Qt
);
3908 Fset_buffer (w
->buffer
);
3909 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3910 unbind_to (count
, Qnil
);
3916 make_dummy_parent (window
)
3920 register struct window
*o
, *p
;
3923 o
= XWINDOW (window
);
3924 p
= allocate_window ();
3925 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3926 ((struct Lisp_Vector
*) p
)->contents
[i
]
3927 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3928 XSETWINDOW (new, p
);
3931 XSETFASTINT (p
->sequence_number
, sequence_number
);
3933 /* Put new into window structure in place of window */
3934 replace_window (window
, new);
3947 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3948 doc
: /* Split WINDOW, putting SIZE lines in the first of the pair.
3949 WINDOW defaults to selected one and SIZE to half its size.
3950 If optional third arg HORFLAG is non-nil, split side by side
3951 and put SIZE columns in the first of the pair. In that case,
3952 SIZE includes that window's scroll bar, or the divider column to its right.
3953 Interactively, all arguments are nil.
3955 Returns the newly created window (which is the lower or rightmost one).
3956 The upper or leftmost window is the original one, and remains selected
3957 if it was selected before.
3959 See Info node `(elisp)Splitting Windows' for more details and examples.*/)
3960 (window
, size
, horflag
)
3961 Lisp_Object window
, size
, horflag
;
3963 register Lisp_Object
new;
3964 register struct window
*o
, *p
;
3966 register int size_int
;
3969 window
= selected_window
;
3971 CHECK_LIVE_WINDOW (window
);
3973 o
= XWINDOW (window
);
3974 fo
= XFRAME (WINDOW_FRAME (o
));
3978 if (!NILP (horflag
))
3979 /* Calculate the size of the left-hand window, by dividing
3980 the usable space in columns by two.
3981 We round up, since the left-hand window may include
3982 a dividing line, while the right-hand may not. */
3983 size_int
= (XFASTINT (o
->total_cols
) + 1) >> 1;
3985 size_int
= XFASTINT (o
->total_lines
) >> 1;
3989 CHECK_NUMBER (size
);
3990 size_int
= XINT (size
);
3993 if (MINI_WINDOW_P (o
))
3994 error ("Attempt to split minibuffer window");
3995 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3996 error ("Attempt to split fixed-size window");
3998 check_min_window_sizes ();
4002 if (size_int
< window_min_height
)
4003 error ("Window height %d too small (after splitting)", size_int
);
4004 if (size_int
+ window_min_height
> XFASTINT (o
->total_lines
))
4005 error ("Window height %d too small (after splitting)",
4006 XFASTINT (o
->total_lines
) - size_int
);
4007 if (NILP (o
->parent
)
4008 || NILP (XWINDOW (o
->parent
)->vchild
))
4010 make_dummy_parent (window
);
4012 XWINDOW (new)->vchild
= window
;
4017 if (size_int
< window_min_width
)
4018 error ("Window width %d too small (after splitting)", size_int
);
4020 if (size_int
+ window_min_width
> XFASTINT (o
->total_cols
))
4021 error ("Window width %d too small (after splitting)",
4022 XFASTINT (o
->total_cols
) - size_int
);
4023 if (NILP (o
->parent
)
4024 || NILP (XWINDOW (o
->parent
)->hchild
))
4026 make_dummy_parent (window
);
4028 XWINDOW (new)->hchild
= window
;
4032 /* Now we know that window's parent is a vertical combination
4033 if we are dividing vertically, or a horizontal combination
4034 if we are making side-by-side windows */
4036 windows_or_buffers_changed
++;
4037 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
4038 new = make_window ();
4041 p
->frame
= o
->frame
;
4043 if (!NILP (p
->next
))
4044 XWINDOW (p
->next
)->prev
= new;
4047 p
->parent
= o
->parent
;
4049 p
->window_end_valid
= Qnil
;
4050 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
4052 /* Duplicate special geometry settings. */
4054 p
->left_margin_cols
= o
->left_margin_cols
;
4055 p
->right_margin_cols
= o
->right_margin_cols
;
4056 p
->left_fringe_width
= o
->left_fringe_width
;
4057 p
->right_fringe_width
= o
->right_fringe_width
;
4058 p
->fringes_outside_margins
= o
->fringes_outside_margins
;
4059 p
->scroll_bar_width
= o
->scroll_bar_width
;
4060 p
->vertical_scroll_bar_type
= o
->vertical_scroll_bar_type
;
4062 /* Apportion the available frame space among the two new windows */
4064 if (!NILP (horflag
))
4066 p
->total_lines
= o
->total_lines
;
4067 p
->top_line
= o
->top_line
;
4068 XSETFASTINT (p
->total_cols
, XFASTINT (o
->total_cols
) - size_int
);
4069 XSETFASTINT (o
->total_cols
, size_int
);
4070 XSETFASTINT (p
->left_col
, XFASTINT (o
->left_col
) + size_int
);
4071 adjust_window_margins (p
);
4072 adjust_window_margins (o
);
4076 p
->left_col
= o
->left_col
;
4077 p
->total_cols
= o
->total_cols
;
4078 XSETFASTINT (p
->total_lines
, XFASTINT (o
->total_lines
) - size_int
);
4079 XSETFASTINT (o
->total_lines
, size_int
);
4080 XSETFASTINT (p
->top_line
, XFASTINT (o
->top_line
) + size_int
);
4083 /* Adjust glyph matrices. */
4086 Fset_window_buffer (new, o
->buffer
, Qt
);
4090 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
4091 doc
: /* Make current window ARG lines bigger.
4092 From program, optional second arg non-nil means grow sideways ARG columns.
4093 Interactively, if an argument is not given, make the window one line bigger.
4094 If HORIZONTAL is non-nil, enlarge horizontally instead of vertically.
4095 This function can delete windows, even the second window, if they get
4098 Lisp_Object arg
, horizontal
;
4101 enlarge_window (selected_window
, XINT (arg
), !NILP (horizontal
));
4103 if (! NILP (Vwindow_configuration_change_hook
))
4104 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4109 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
4110 doc
: /* Make current window ARG lines smaller.
4111 From program, optional second arg non-nil means shrink sideways arg columns.
4112 Interactively, if an argument is not given, make the window one line smaller. Only
4113 siblings to the right or below are changed. */)
4115 Lisp_Object arg
, side
;
4118 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
4120 if (! NILP (Vwindow_configuration_change_hook
))
4121 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4127 window_height (window
)
4130 register struct window
*p
= XWINDOW (window
);
4131 return WINDOW_TOTAL_LINES (p
);
4135 window_width (window
)
4138 register struct window
*p
= XWINDOW (window
);
4139 return WINDOW_TOTAL_COLS (p
);
4144 *(horiz_flag ? &(XWINDOW (w)->left_col) : &(XWINDOW (w)->top_line))
4146 #define CURSIZE(w) \
4147 *(horiz_flag ? &(XWINDOW (w)->total_cols) : &(XWINDOW (w)->total_lines))
4150 /* Enlarge WINDOW by DELTA.
4151 HORIZ_FLAG nonzero means enlarge it horizontally;
4152 zero means do it vertically.
4154 Siblings of the selected window are resized to fulfill the size
4155 request. If they become too small in the process, they will be
4159 enlarge_window (window
, delta
, horiz_flag
)
4161 int delta
, horiz_flag
;
4163 Lisp_Object parent
, next
, prev
;
4167 int (*sizefun
) P_ ((Lisp_Object
))
4168 = horiz_flag
? window_width
: window_height
;
4169 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
4170 = (horiz_flag
? set_window_width
: set_window_height
);
4172 /* Check values of window_min_width and window_min_height for
4174 check_min_window_sizes ();
4176 /* Give up if this window cannot be resized. */
4177 if (window_fixed_size_p (XWINDOW (window
), horiz_flag
, 1))
4178 error ("Window is not resizable");
4180 /* Find the parent of the selected window. */
4183 p
= XWINDOW (window
);
4189 error ("No other window to side of this one");
4194 ? !NILP (XWINDOW (parent
)->hchild
)
4195 : !NILP (XWINDOW (parent
)->vchild
))
4201 sizep
= &CURSIZE (window
);
4204 register int maxdelta
;
4206 /* Compute the maximum size increment this window can have. */
4208 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
4209 /* This is a main window followed by a minibuffer. */
4210 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
4211 - window_min_size (XWINDOW (p
->next
),
4213 /* This is a minibuffer following a main window. */
4214 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
4215 - window_min_size (XWINDOW (p
->prev
),
4217 /* This is a frame with only one window, a minibuffer-only
4218 or a minibufferless frame. */
4221 if (delta
> maxdelta
)
4222 /* This case traps trying to make the minibuffer
4223 the full frame, or make the only window aside from the
4224 minibuffer the full frame. */
4228 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), horiz_flag
, 0, 0))
4230 delete_window (window
);
4237 /* Find the total we can get from other siblings without deleting them. */
4239 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
4240 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
4242 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
4243 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
4246 /* If we can get it all from them without deleting them, do so. */
4247 if (delta
<= maximum
)
4249 Lisp_Object first_unaffected
;
4250 Lisp_Object first_affected
;
4255 first_affected
= window
;
4256 /* Look at one sibling at a time,
4257 moving away from this window in both directions alternately,
4258 and take as much as we can get without deleting that sibling. */
4260 && (!NILP (next
) || !NILP (prev
)))
4264 int this_one
= ((*sizefun
) (next
)
4265 - window_min_size (XWINDOW (next
),
4266 horiz_flag
, 0, &fixed_p
));
4269 if (this_one
> delta
)
4272 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
4273 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4278 next
= XWINDOW (next
)->next
;
4286 int this_one
= ((*sizefun
) (prev
)
4287 - window_min_size (XWINDOW (prev
),
4288 horiz_flag
, 0, &fixed_p
));
4291 if (this_one
> delta
)
4294 first_affected
= prev
;
4296 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
4297 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4302 prev
= XWINDOW (prev
)->prev
;
4306 xassert (delta
== 0);
4308 /* Now recalculate the edge positions of all the windows affected,
4309 based on the new sizes. */
4310 first_unaffected
= next
;
4311 prev
= first_affected
;
4312 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
4313 prev
= next
, next
= XWINDOW (next
)->next
)
4315 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
4316 /* This does not change size of NEXT,
4317 but it propagates the new top edge to its children */
4318 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
4323 register int delta1
;
4324 register int opht
= (*sizefun
) (parent
);
4326 if (opht
<= XINT (*sizep
) + delta
)
4328 /* If trying to grow this window to or beyond size of the parent,
4329 just delete all the sibling windows. */
4330 Lisp_Object start
, tem
, next
;
4332 start
= XWINDOW (parent
)->vchild
;
4334 start
= XWINDOW (parent
)->hchild
;
4336 /* Delete any siblings that come after WINDOW. */
4337 tem
= XWINDOW (window
)->next
;
4338 while (! NILP (tem
))
4340 next
= XWINDOW (tem
)->next
;
4341 delete_window (tem
);
4345 /* Delete any siblings that come after WINDOW.
4346 Note that if START is not WINDOW, then WINDOW still
4347 Fhas siblings, so WINDOW has not yet replaced its parent. */
4349 while (! EQ (tem
, window
))
4351 next
= XWINDOW (tem
)->next
;
4352 delete_window (tem
);
4358 /* Otherwise, make delta1 just right so that if we add
4359 delta1 lines to this window and to the parent, and then
4360 shrink the parent back to its original size, the new
4361 proportional size of this window will increase by delta.
4363 The function size_window will compute the new height h'
4364 of the window from delta1 as:
4367 x = delta1 - delta1/n * n for the 1st resizable child
4370 where n is the number of children that can be resized.
4371 We can ignore x by choosing a delta1 that is a multiple of
4372 n. We want the height of this window to come out as
4382 The number of children n equals the number of resizable
4383 children of this window + 1 because we know window itself
4384 is resizable (otherwise we would have signalled an error). */
4386 struct window
*w
= XWINDOW (window
);
4390 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
4391 if (!window_fixed_size_p (XWINDOW (s
), horiz_flag
, 0))
4393 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
4394 if (!window_fixed_size_p (XWINDOW (s
), horiz_flag
, 0))
4399 /* Add delta1 lines or columns to this window, and to the parent,
4400 keeping things consistent while not affecting siblings. */
4401 XSETINT (CURSIZE (parent
), opht
+ delta1
);
4402 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
4404 /* Squeeze out delta1 lines or columns from our parent,
4405 shriking this window and siblings proportionately.
4406 This brings parent back to correct size.
4407 Delta1 was calculated so this makes this window the desired size,
4408 taking it all out of the siblings. */
4409 (*setsizefun
) (parent
, opht
, 0);
4414 XSETFASTINT (p
->last_modified
, 0);
4415 XSETFASTINT (p
->last_overlay_modified
, 0);
4417 /* Adjust glyph matrices. */
4418 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4422 /* Adjust the size of WINDOW by DELTA, moving only its trailing edge.
4423 HORIZ_FLAG nonzero means adjust the width, moving the right edge.
4424 zero means adjust the height, moving the bottom edge.
4426 Following siblings of the selected window are resized to fulfill
4427 the size request. If they become too small in the process, they
4428 are not deleted; instead, we signal an error. */
4431 adjust_window_trailing_edge (window
, delta
, horiz_flag
)
4433 int delta
, horiz_flag
;
4435 Lisp_Object parent
, child
;
4437 Lisp_Object old_config
= Fcurrent_window_configuration (Qnil
);
4438 int delcount
= window_deletion_count
;
4440 /* Check values of window_min_width and window_min_height for
4442 check_min_window_sizes ();
4445 window
= Fselected_window ();
4447 CHECK_WINDOW (window
);
4449 /* Give up if this window cannot be resized. */
4450 if (window_fixed_size_p (XWINDOW (window
), horiz_flag
, 1))
4451 error ("Window is not resizable");
4455 Lisp_Object first_parallel
= Qnil
;
4459 /* This happens if WINDOW on the previous iteration was
4460 at top level of the window tree. */
4461 Fset_window_configuration (old_config
);
4462 error ("Specified window edge is fixed");
4465 p
= XWINDOW (window
);
4468 /* See if this level has windows in parallel in the specified
4469 direction. If so, set FIRST_PARALLEL to the first one. */
4472 if (! NILP (parent
) && !NILP (XWINDOW (parent
)->vchild
))
4473 first_parallel
= XWINDOW (parent
)->vchild
;
4474 else if (NILP (parent
) && !NILP (p
->next
))
4476 /* Handle the vertical chain of main window and minibuffer
4477 which has no parent. */
4478 first_parallel
= window
;
4479 while (! NILP (XWINDOW (first_parallel
)->prev
))
4480 first_parallel
= XWINDOW (first_parallel
)->prev
;
4485 if (! NILP (parent
) && !NILP (XWINDOW (parent
)->hchild
))
4486 first_parallel
= XWINDOW (parent
)->hchild
;
4489 /* If this level's succession is in the desired dimension,
4490 and this window is the last one, and there is no higher level,
4491 its trailing edge is fixed. */
4492 if (NILP (XWINDOW (window
)->next
) && NILP (first_parallel
)
4495 Fset_window_configuration (old_config
);
4496 error ("Specified window edge is fixed");
4499 /* Don't make this window too small. */
4500 if (XINT (CURSIZE (window
)) + delta
4501 < (horiz_flag
? window_min_width
: window_min_height
))
4503 Fset_window_configuration (old_config
);
4504 error ("Cannot adjust window size as specified");
4507 /* Clear out some redisplay caches. */
4508 XSETFASTINT (p
->last_modified
, 0);
4509 XSETFASTINT (p
->last_overlay_modified
, 0);
4511 /* Adjust this window's edge. */
4512 XSETINT (CURSIZE (window
),
4513 XINT (CURSIZE (window
)) + delta
);
4515 /* If this window has following siblings in the desired dimension,
4516 make them smaller, and exit the loop.
4518 (If we reach the top of the tree and can never do this,
4519 we will fail and report an error, above.) */
4520 if (NILP (first_parallel
))
4522 if (!NILP (p
->next
))
4524 /* This may happen for the minibuffer. In that case
4525 the window_deletion_count check below does not work. */
4526 if (XINT (CURSIZE (p
->next
)) - delta
<= 0)
4528 Fset_window_configuration (old_config
);
4529 error ("Cannot adjust window size as specified");
4532 XSETINT (CURBEG (p
->next
),
4533 XINT (CURBEG (p
->next
)) + delta
);
4534 size_window (p
->next
, XINT (CURSIZE (p
->next
)) - delta
,
4535 horiz_flag
, 0, 1, 0);
4540 /* Here we have a chain of parallel siblings, in the other dimension.
4541 Change the size of the other siblings. */
4542 for (child
= first_parallel
;
4544 child
= XWINDOW (child
)->next
)
4545 if (! EQ (child
, window
))
4546 size_window (child
, XINT (CURSIZE (child
)) + delta
,
4547 horiz_flag
, 0, 0, 1);
4552 /* If we made a window so small it got deleted,
4553 we failed. Report failure. */
4554 if (delcount
!= window_deletion_count
)
4556 Fset_window_configuration (old_config
);
4557 error ("Cannot adjust window size as specified");
4560 /* Adjust glyph matrices. */
4561 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4567 DEFUN ("adjust-window-trailing-edge", Fadjust_window_trailing_edge
,
4568 Sadjust_window_trailing_edge
, 3, 3, 0,
4569 doc
: /* Adjust the bottom or right edge of WINDOW by DELTA.
4570 If HORIZONTAL is non-nil, that means adjust the width, moving the right edge.
4571 Otherwise, adjust the height, moving the bottom edge.
4573 Following siblings of the selected window are resized to fulfill
4574 the size request. If they become too small in the process, they
4575 are not deleted; instead, we signal an error. */)
4576 (window
, delta
, horizontal
)
4577 Lisp_Object window
, delta
, horizontal
;
4579 CHECK_NUMBER (delta
);
4580 adjust_window_trailing_edge (window
, XINT (delta
), !NILP (horizontal
));
4582 if (! NILP (Vwindow_configuration_change_hook
))
4583 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4590 /***********************************************************************
4591 Resizing Mini-Windows
4592 ***********************************************************************/
4594 static void shrink_window_lowest_first
P_ ((struct window
*, int));
4596 enum save_restore_action
4603 static int save_restore_orig_size
P_ ((struct window
*,
4604 enum save_restore_action
));
4606 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
4607 from lowest windows first. */
4610 shrink_window_lowest_first (w
, height
)
4618 xassert (!MINI_WINDOW_P (w
));
4620 /* Set redisplay hints. */
4621 XSETFASTINT (w
->last_modified
, 0);
4622 XSETFASTINT (w
->last_overlay_modified
, 0);
4623 windows_or_buffers_changed
++;
4624 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
4626 old_height
= XFASTINT (w
->total_lines
);
4627 XSETFASTINT (w
->total_lines
, height
);
4629 if (!NILP (w
->hchild
))
4631 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
4633 c
= XWINDOW (child
);
4634 c
->top_line
= w
->top_line
;
4635 shrink_window_lowest_first (c
, height
);
4638 else if (!NILP (w
->vchild
))
4640 Lisp_Object last_child
;
4641 int delta
= old_height
- height
;
4646 /* Find the last child. We are taking space from lowest windows
4647 first, so we iterate over children from the last child
4649 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
4652 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
4653 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
4657 c
= XWINDOW (child
);
4658 this_one
= XFASTINT (c
->total_lines
) - MIN_SAFE_WINDOW_HEIGHT
;
4660 if (this_one
> delta
)
4663 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
) - this_one
);
4667 /* Compute new positions. */
4668 last_top
= XINT (w
->top_line
);
4669 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
4671 c
= XWINDOW (child
);
4672 c
->top_line
= make_number (last_top
);
4673 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
));
4674 last_top
+= XFASTINT (c
->total_lines
);
4680 /* Save, restore, or check positions and sizes in the window tree
4681 rooted at W. ACTION says what to do.
4683 If ACTION is CHECK_ORIG_SIZES, check if orig_top_line and
4684 orig_total_lines members are valid for all windows in the window
4685 tree. Value is non-zero if they are valid.
4687 If ACTION is SAVE_ORIG_SIZES, save members top and height in
4688 orig_top_line and orig_total_lines for all windows in the tree.
4690 If ACTION is RESTORE_ORIG_SIZES, restore top and height from values
4691 stored in orig_top_line and orig_total_lines for all windows. */
4694 save_restore_orig_size (w
, action
)
4696 enum save_restore_action action
;
4702 if (!NILP (w
->hchild
))
4704 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
4707 else if (!NILP (w
->vchild
))
4709 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
4715 case CHECK_ORIG_SIZES
:
4716 if (!INTEGERP (w
->orig_top_line
) || !INTEGERP (w
->orig_total_lines
))
4720 case SAVE_ORIG_SIZES
:
4721 w
->orig_top_line
= w
->top_line
;
4722 w
->orig_total_lines
= w
->total_lines
;
4723 XSETFASTINT (w
->last_modified
, 0);
4724 XSETFASTINT (w
->last_overlay_modified
, 0);
4727 case RESTORE_ORIG_SIZES
:
4728 xassert (INTEGERP (w
->orig_top_line
) && INTEGERP (w
->orig_total_lines
));
4729 w
->top_line
= w
->orig_top_line
;
4730 w
->total_lines
= w
->orig_total_lines
;
4731 w
->orig_total_lines
= w
->orig_top_line
= Qnil
;
4732 XSETFASTINT (w
->last_modified
, 0);
4733 XSETFASTINT (w
->last_overlay_modified
, 0);
4740 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
4747 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
4748 without deleting other windows. */
4751 grow_mini_window (w
, delta
)
4755 struct frame
*f
= XFRAME (w
->frame
);
4756 struct window
*root
;
4758 xassert (MINI_WINDOW_P (w
));
4759 xassert (delta
>= 0);
4761 /* Check values of window_min_width and window_min_height for
4763 check_min_window_sizes ();
4765 /* Compute how much we can enlarge the mini-window without deleting
4767 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4770 int min_height
= window_min_size (root
, 0, 0, 0);
4771 if (XFASTINT (root
->total_lines
) - delta
< min_height
)
4772 /* Note that the root window may already be smaller than
4774 delta
= max (0, XFASTINT (root
->total_lines
) - min_height
);
4779 /* Save original window sizes and positions, if not already done. */
4780 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4781 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
4783 /* Shrink other windows. */
4784 shrink_window_lowest_first (root
, XFASTINT (root
->total_lines
) - delta
);
4786 /* Grow the mini-window. */
4787 w
->top_line
= make_number (XFASTINT (root
->top_line
) + XFASTINT (root
->total_lines
));
4788 w
->total_lines
= make_number (XFASTINT (w
->total_lines
) + delta
);
4789 XSETFASTINT (w
->last_modified
, 0);
4790 XSETFASTINT (w
->last_overlay_modified
, 0);
4797 /* Shrink mini-window W. If there is recorded info about window sizes
4798 before a call to grow_mini_window, restore recorded window sizes.
4799 Otherwise, if the mini-window is higher than 1 line, resize it to 1
4803 shrink_mini_window (w
)
4806 struct frame
*f
= XFRAME (w
->frame
);
4807 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4809 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4811 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
4813 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4814 windows_or_buffers_changed
= 1;
4816 else if (XFASTINT (w
->total_lines
) > 1)
4818 /* Distribute the additional lines of the mini-window
4819 among the other windows. */
4821 XSETWINDOW (window
, w
);
4822 enlarge_window (window
, 1 - XFASTINT (w
->total_lines
), 0);
4828 /* Mark window cursors off for all windows in the window tree rooted
4829 at W by setting their phys_cursor_on_p flag to zero. Called from
4830 xterm.c, e.g. when a frame is cleared and thereby all cursors on
4831 the frame are cleared. */
4834 mark_window_cursors_off (w
)
4839 if (!NILP (w
->hchild
))
4840 mark_window_cursors_off (XWINDOW (w
->hchild
));
4841 else if (!NILP (w
->vchild
))
4842 mark_window_cursors_off (XWINDOW (w
->vchild
));
4844 w
->phys_cursor_on_p
= 0;
4846 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4851 /* Return number of lines of text (not counting mode lines) in W. */
4854 window_internal_height (w
)
4857 int ht
= XFASTINT (w
->total_lines
);
4859 if (!MINI_WINDOW_P (w
))
4861 if (!NILP (w
->parent
)
4862 || !NILP (w
->vchild
)
4863 || !NILP (w
->hchild
)
4866 || WINDOW_WANTS_MODELINE_P (w
))
4869 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4877 /* Return the number of columns in W.
4878 Don't count columns occupied by scroll bars or the vertical bar
4879 separating W from the sibling to its right. */
4882 window_box_text_cols (w
)
4885 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4886 int width
= XINT (w
->total_cols
);
4888 if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w
))
4889 /* Scroll bars occupy a few columns. */
4890 width
-= WINDOW_CONFIG_SCROLL_BAR_COLS (w
);
4891 else if (!FRAME_WINDOW_P (f
)
4892 && !WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
4893 /* The column of `|' characters separating side-by-side windows
4894 occupies one column only. */
4897 if (FRAME_WINDOW_P (f
))
4898 /* On window-systems, fringes and display margins cannot be
4899 used for normal text. */
4900 width
-= (WINDOW_FRINGE_COLS (w
)
4901 + WINDOW_LEFT_MARGIN_COLS (w
)
4902 + WINDOW_RIGHT_MARGIN_COLS (w
));
4908 /************************************************************************
4910 ***********************************************************************/
4912 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
4913 N screen-fulls, which is defined as the height of the window minus
4914 next_screen_context_lines. If WHOLE is zero, scroll up N lines
4915 instead. Negative values of N mean scroll down. NOERROR non-zero
4916 means don't signal an error if we try to move over BEGV or ZV,
4920 window_scroll (window
, n
, whole
, noerror
)
4928 /* If we must, use the pixel-based version which is much slower than
4929 the line-based one but can handle varying line heights. */
4930 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
4931 window_scroll_pixel_based (window
, n
, whole
, noerror
);
4933 window_scroll_line_based (window
, n
, whole
, noerror
);
4939 /* Implementation of window_scroll that works based on pixel line
4940 heights. See the comment of window_scroll for parameter
4944 window_scroll_pixel_based (window
, n
, whole
, noerror
)
4951 struct window
*w
= XWINDOW (window
);
4952 struct text_pos start
;
4953 int this_scroll_margin
;
4954 /* True if we fiddled the window vscroll field without really scrolling. */
4956 int x
, y
, rtop
, rbot
, rowh
, vpos
;
4958 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4960 /* If PT is not visible in WINDOW, move back one half of
4961 the screen. Allow PT to be partially visible, otherwise
4962 something like (scroll-down 1) with PT in the line before
4963 the partially visible one would recenter. */
4965 if (!pos_visible_p (w
, PT
, &x
, &y
, &rtop
, &rbot
, &rowh
, &vpos
))
4967 /* Move backward half the height of the window. Performance note:
4968 vmotion used here is about 10% faster, but would give wrong
4969 results for variable height lines. */
4970 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4971 it
.current_y
= it
.last_visible_y
;
4972 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
4974 /* The function move_iterator_vertically may move over more than
4975 the specified y-distance. If it->w is small, e.g. a
4976 mini-buffer window, we may end up in front of the window's
4977 display area. This is the case when Start displaying at the
4978 start of the line containing PT in this case. */
4979 if (it
.current_y
<= 0)
4981 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4982 move_it_vertically_backward (&it
, 0);
4986 start
= it
.current
.pos
;
4988 else if (auto_window_vscroll_p
)
4990 if (rtop
|| rbot
) /* partially visible */
4993 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4995 dy
= max ((window_box_height (w
)
4996 - next_screen_context_lines
* dy
),
5002 /* Only vscroll backwards if already vscrolled forwards. */
5003 if (w
->vscroll
< 0 && rtop
> 0)
5005 px
= max (0, -w
->vscroll
- min (rtop
, -dy
));
5006 Fset_window_vscroll (window
, make_number (px
), Qt
);
5012 /* Do vscroll if already vscrolled or only display line. */
5013 if (rbot
> 0 && (w
->vscroll
< 0 || vpos
== 0))
5015 px
= max (0, -w
->vscroll
+ min (rbot
, dy
));
5016 Fset_window_vscroll (window
, make_number (px
), Qt
);
5020 /* Maybe modify window start instead of scrolling. */
5021 if (rbot
> 0 || w
->vscroll
< 0)
5025 Fset_window_vscroll (window
, make_number (0), Qt
);
5026 /* If there are other text lines above the current row,
5027 move window start to current row. Else to next row. */
5029 spos
= XINT (Fline_beginning_position (Qnil
));
5031 spos
= min (XINT (Fline_end_position (Qnil
)) + 1, ZV
);
5032 set_marker_restricted (w
->start
, make_number (spos
),
5034 w
->start_at_line_beg
= Qt
;
5035 w
->update_mode_line
= Qt
;
5036 XSETFASTINT (w
->last_modified
, 0);
5037 XSETFASTINT (w
->last_overlay_modified
, 0);
5038 /* Set force_start so that redisplay_window will run the
5039 window-scroll-functions. */
5040 w
->force_start
= Qt
;
5045 /* Cancel previous vscroll. */
5046 Fset_window_vscroll (window
, make_number (0), Qt
);
5049 /* If scroll_preserve_screen_position is non-nil, we try to set
5050 point in the same window line as it is now, so get that line. */
5051 if (!NILP (Vscroll_preserve_screen_position
))
5053 /* We preserve the goal pixel coordinate across consecutive
5054 calls to scroll-up or scroll-down. This avoids the
5055 possibility of point becoming "stuck" on a tall line when
5056 scrolling by one line. */
5057 if (window_scroll_pixel_based_preserve_y
< 0
5058 || (!EQ (current_kboard
->Vlast_command
, Qscroll_up
)
5059 && !EQ (current_kboard
->Vlast_command
, Qscroll_down
)))
5061 start_display (&it
, w
, start
);
5062 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
5063 window_scroll_pixel_based_preserve_y
= it
.current_y
;
5067 window_scroll_pixel_based_preserve_y
= -1;
5069 /* Move iterator it from start the specified distance forward or
5070 backward. The result is the new window start. */
5071 start_display (&it
, w
, start
);
5074 int start_pos
= IT_CHARPOS (it
);
5075 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
5076 dy
= max ((window_box_height (w
)
5077 - next_screen_context_lines
* dy
),
5080 /* Note that move_it_vertically always moves the iterator to the
5081 start of a line. So, if the last line doesn't have a newline,
5082 we would end up at the start of the line ending at ZV. */
5085 move_it_vertically_backward (&it
, -dy
);
5086 /* Ensure we actually do move, e.g. in case we are currently
5087 looking at an image that is taller that the window height. */
5088 while (start_pos
== IT_CHARPOS (it
)
5089 && start_pos
> BEGV
)
5090 move_it_by_lines (&it
, -1, 1);
5094 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
5095 MOVE_TO_POS
| MOVE_TO_Y
);
5096 /* Ensure we actually do move, e.g. in case we are currently
5097 looking at an image that is taller that the window height. */
5098 while (start_pos
== IT_CHARPOS (it
)
5100 move_it_by_lines (&it
, 1, 1);
5104 move_it_by_lines (&it
, n
, 1);
5106 /* We failed if we find ZV is already on the screen (scrolling up,
5107 means there's nothing past the end), or if we can't start any
5108 earlier (scrolling down, means there's nothing past the top). */
5109 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
5110 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
5112 if (IT_CHARPOS (it
) == ZV
)
5114 if (it
.current_y
< it
.last_visible_y
5115 && (it
.current_y
+ it
.max_ascent
+ it
.max_descent
5116 > it
.last_visible_y
))
5118 /* The last line was only partially visible, make it fully
5120 w
->vscroll
= (it
.last_visible_y
5121 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
5122 adjust_glyphs (it
.f
);
5126 else if (n
< 0) /* could happen with empty buffers */
5127 xsignal0 (Qbeginning_of_buffer
);
5129 xsignal0 (Qend_of_buffer
);
5133 if (w
->vscroll
!= 0)
5134 /* The first line was only partially visible, make it fully
5140 xsignal0 (Qbeginning_of_buffer
);
5143 /* If control gets here, then we vscrolled. */
5145 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5147 /* Don't try to change the window start below. */
5153 int pos
= IT_CHARPOS (it
);
5156 /* If in the middle of a multi-glyph character move forward to
5157 the next character. */
5158 if (in_display_vector_p (&it
))
5161 move_it_to (&it
, pos
, -1, -1, -1, MOVE_TO_POS
);
5164 /* Set the window start, and set up the window for redisplay. */
5165 set_marker_restricted (w
->start
, make_number (pos
),
5167 bytepos
= XMARKER (w
->start
)->bytepos
;
5168 w
->start_at_line_beg
= ((pos
== BEGV
|| FETCH_BYTE (bytepos
- 1) == '\n')
5170 w
->update_mode_line
= Qt
;
5171 XSETFASTINT (w
->last_modified
, 0);
5172 XSETFASTINT (w
->last_overlay_modified
, 0);
5173 /* Set force_start so that redisplay_window will run the
5174 window-scroll-functions. */
5175 w
->force_start
= Qt
;
5178 /* The rest of this function uses current_y in a nonstandard way,
5179 not including the height of the header line if any. */
5180 it
.current_y
= it
.vpos
= 0;
5182 /* Move PT out of scroll margins.
5183 This code wants current_y to be zero at the window start position
5184 even if there is a header line. */
5185 this_scroll_margin
= max (0, scroll_margin
);
5186 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->total_lines
) / 4);
5187 this_scroll_margin
*= FRAME_LINE_HEIGHT (it
.f
);
5191 /* We moved the window start towards ZV, so PT may be now
5192 in the scroll margin at the top. */
5193 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
5194 if (IT_CHARPOS (it
) == PT
&& it
.current_y
>= this_scroll_margin
5195 && (NILP (Vscroll_preserve_screen_position
)
5196 || EQ (Vscroll_preserve_screen_position
, Qt
)))
5197 /* We found PT at a legitimate height. Leave it alone. */
5199 else if (window_scroll_pixel_based_preserve_y
>= 0)
5201 /* If we have a header line, take account of it.
5202 This is necessary because we set it.current_y to 0, above. */
5203 move_it_to (&it
, -1, -1,
5204 window_scroll_pixel_based_preserve_y
5205 - (WINDOW_WANTS_HEADER_LINE_P (w
) ? 1 : 0 ),
5207 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5211 while (it
.current_y
< this_scroll_margin
)
5213 int prev
= it
.current_y
;
5214 move_it_by_lines (&it
, 1, 1);
5215 if (prev
== it
.current_y
)
5218 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5223 int charpos
, bytepos
;
5226 /* Save our position, for the
5227 window_scroll_pixel_based_preserve_y case. */
5228 charpos
= IT_CHARPOS (it
);
5229 bytepos
= IT_BYTEPOS (it
);
5231 /* We moved the window start towards BEGV, so PT may be now
5232 in the scroll margin at the bottom. */
5233 move_it_to (&it
, PT
, -1,
5234 (it
.last_visible_y
- CURRENT_HEADER_LINE_HEIGHT (w
)
5235 - this_scroll_margin
- 1),
5237 MOVE_TO_POS
| MOVE_TO_Y
);
5239 /* Save our position, in case it's correct. */
5240 charpos
= IT_CHARPOS (it
);
5241 bytepos
= IT_BYTEPOS (it
);
5243 /* See if point is on a partially visible line at the end. */
5244 if (it
.what
== IT_EOB
)
5245 partial_p
= it
.current_y
+ it
.ascent
+ it
.descent
> it
.last_visible_y
;
5248 move_it_by_lines (&it
, 1, 1);
5249 partial_p
= it
.current_y
> it
.last_visible_y
;
5252 if (charpos
== PT
&& !partial_p
5253 && (NILP (Vscroll_preserve_screen_position
)
5254 || EQ (Vscroll_preserve_screen_position
, Qt
)))
5255 /* We found PT before we found the display margin, so PT is ok. */
5257 else if (window_scroll_pixel_based_preserve_y
>= 0)
5259 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5260 start_display (&it
, w
, start
);
5261 /* It would be wrong to subtract CURRENT_HEADER_LINE_HEIGHT
5262 here because we called start_display again and did not
5263 alter it.current_y this time. */
5264 move_it_to (&it
, -1, -1, window_scroll_pixel_based_preserve_y
, -1,
5266 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5271 /* The last line was only partially visible, so back up two
5272 lines to make sure we're on a fully visible line. */
5274 move_it_by_lines (&it
, -2, 0);
5275 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5278 /* No, the position we saved is OK, so use it. */
5279 SET_PT_BOTH (charpos
, bytepos
);
5285 /* Implementation of window_scroll that works based on screen lines.
5286 See the comment of window_scroll for parameter descriptions. */
5289 window_scroll_line_based (window
, n
, whole
, noerror
)
5295 register struct window
*w
= XWINDOW (window
);
5296 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
5297 register int pos
, pos_byte
;
5298 register int ht
= window_internal_height (w
);
5299 register Lisp_Object tem
;
5303 struct position posit
;
5306 /* If scrolling screen-fulls, compute the number of lines to
5307 scroll from the window's height. */
5309 n
*= max (1, ht
- next_screen_context_lines
);
5311 startpos
= marker_position (w
->start
);
5313 posit
= *compute_motion (startpos
, 0, 0, 0,
5315 -1, XINT (w
->hscroll
),
5317 original_vpos
= posit
.vpos
;
5319 XSETFASTINT (tem
, PT
);
5320 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
5324 Fvertical_motion (make_number (- (ht
/ 2)), window
);
5329 lose
= n
< 0 && PT
== BEGV
;
5330 Fvertical_motion (make_number (n
), window
);
5334 SET_PT_BOTH (opoint
, opoint_byte
);
5341 xsignal0 (Qbeginning_of_buffer
);
5346 int this_scroll_margin
= scroll_margin
;
5348 /* Don't use a scroll margin that is negative or too large. */
5349 if (this_scroll_margin
< 0)
5350 this_scroll_margin
= 0;
5352 if (XINT (w
->total_lines
) < 4 * scroll_margin
)
5353 this_scroll_margin
= XINT (w
->total_lines
) / 4;
5355 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
5356 w
->start_at_line_beg
= bolp
;
5357 w
->update_mode_line
= Qt
;
5358 XSETFASTINT (w
->last_modified
, 0);
5359 XSETFASTINT (w
->last_overlay_modified
, 0);
5360 /* Set force_start so that redisplay_window will run
5361 the window-scroll-functions. */
5362 w
->force_start
= Qt
;
5364 if (!NILP (Vscroll_preserve_screen_position
)
5365 && (whole
|| !EQ (Vscroll_preserve_screen_position
, Qt
)))
5367 SET_PT_BOTH (pos
, pos_byte
);
5368 Fvertical_motion (make_number (original_vpos
), window
);
5370 /* If we scrolled forward, put point enough lines down
5371 that it is outside the scroll margin. */
5376 if (this_scroll_margin
> 0)
5378 SET_PT_BOTH (pos
, pos_byte
);
5379 Fvertical_motion (make_number (this_scroll_margin
), window
);
5385 if (top_margin
<= opoint
)
5386 SET_PT_BOTH (opoint
, opoint_byte
);
5387 else if (!NILP (Vscroll_preserve_screen_position
))
5389 SET_PT_BOTH (pos
, pos_byte
);
5390 Fvertical_motion (make_number (original_vpos
), window
);
5393 SET_PT (top_margin
);
5399 /* If we scrolled backward, put point near the end of the window
5400 but not within the scroll margin. */
5401 SET_PT_BOTH (pos
, pos_byte
);
5402 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
5403 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
5406 bottom_margin
= PT
+ 1;
5408 if (bottom_margin
> opoint
)
5409 SET_PT_BOTH (opoint
, opoint_byte
);
5412 if (!NILP (Vscroll_preserve_screen_position
))
5414 SET_PT_BOTH (pos
, pos_byte
);
5415 Fvertical_motion (make_number (original_vpos
), window
);
5418 Fvertical_motion (make_number (-1), window
);
5427 xsignal0 (Qend_of_buffer
);
5432 /* Scroll selected_window up or down. If N is nil, scroll a
5433 screen-full which is defined as the height of the window minus
5434 next_screen_context_lines. If N is the symbol `-', scroll.
5435 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
5436 up. This is the guts of Fscroll_up and Fscroll_down. */
5439 scroll_command (n
, direction
)
5443 int count
= SPECPDL_INDEX ();
5445 xassert (abs (direction
) == 1);
5447 /* If selected window's buffer isn't current, make it current for
5448 the moment. But don't screw up if window_scroll gets an error. */
5449 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
5451 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5452 Fset_buffer (XWINDOW (selected_window
)->buffer
);
5454 /* Make redisplay consider other windows than just selected_window. */
5455 ++windows_or_buffers_changed
;
5459 window_scroll (selected_window
, direction
, 1, 0);
5460 else if (EQ (n
, Qminus
))
5461 window_scroll (selected_window
, -direction
, 1, 0);
5464 n
= Fprefix_numeric_value (n
);
5465 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
5468 unbind_to (count
, Qnil
);
5471 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
5472 doc
: /* Scroll text of current window upward ARG lines.
5473 If ARG is omitted or nil, scroll upward by a near full screen.
5474 A near full screen is `next-screen-context-lines' less than a full screen.
5475 Negative ARG means scroll downward.
5476 If ARG is the atom `-', scroll downward by nearly full screen.
5477 When calling from a program, supply as argument a number, nil, or `-'. */)
5481 scroll_command (arg
, 1);
5485 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
5486 doc
: /* Scroll text of current window down ARG lines.
5487 If ARG is omitted or nil, scroll down by a near full screen.
5488 A near full screen is `next-screen-context-lines' less than a full screen.
5489 Negative ARG means scroll upward.
5490 If ARG is the atom `-', scroll upward by nearly full screen.
5491 When calling from a program, supply as argument a number, nil, or `-'. */)
5495 scroll_command (arg
, -1);
5499 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
5500 doc
: /* Return the other window for \"other window scroll\" commands.
5501 If `other-window-scroll-buffer' is non-nil, a window
5502 showing that buffer is used.
5503 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5504 specifies the window. This takes precedence over
5505 `other-window-scroll-buffer'. */)
5510 if (MINI_WINDOW_P (XWINDOW (selected_window
))
5511 && !NILP (Vminibuf_scroll_window
))
5512 window
= Vminibuf_scroll_window
;
5513 /* If buffer is specified, scroll that buffer. */
5514 else if (!NILP (Vother_window_scroll_buffer
))
5516 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
5518 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
5522 /* Nothing specified; look for a neighboring window on the same
5524 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
5526 if (EQ (window
, selected_window
))
5527 /* That didn't get us anywhere; look for a window on another
5530 window
= Fnext_window (window
, Qnil
, Qt
);
5531 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
5532 && ! EQ (window
, selected_window
));
5535 CHECK_LIVE_WINDOW (window
);
5537 if (EQ (window
, selected_window
))
5538 error ("There is no other window");
5543 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
5544 doc
: /* Scroll next window upward ARG lines; or near full screen if no ARG.
5545 A near full screen is `next-screen-context-lines' less than a full screen.
5546 The next window is the one below the current one; or the one at the top
5547 if the current one is at the bottom. Negative ARG means scroll downward.
5548 If ARG is the atom `-', scroll downward by nearly full screen.
5549 When calling from a program, supply as argument a number, nil, or `-'.
5551 If `other-window-scroll-buffer' is non-nil, scroll the window
5552 showing that buffer, popping the buffer up if necessary.
5553 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5554 specifies the window to scroll. This takes precedence over
5555 `other-window-scroll-buffer'. */)
5561 int count
= SPECPDL_INDEX ();
5563 window
= Fother_window_for_scrolling ();
5564 w
= XWINDOW (window
);
5566 /* Don't screw up if window_scroll gets an error. */
5567 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5568 ++windows_or_buffers_changed
;
5570 Fset_buffer (w
->buffer
);
5571 SET_PT (marker_position (w
->pointm
));
5574 window_scroll (window
, 1, 1, 1);
5575 else if (EQ (arg
, Qminus
))
5576 window_scroll (window
, -1, 1, 1);
5582 window_scroll (window
, XINT (arg
), 0, 1);
5585 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
5586 unbind_to (count
, Qnil
);
5591 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 2, "P\np",
5592 doc
: /* Scroll selected window display ARG columns left.
5593 Default for ARG is window width minus 2.
5594 Value is the total amount of leftward horizontal scrolling in
5595 effect after the change.
5596 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5597 lower bound for automatic scrolling, i.e. automatic scrolling
5598 will not scroll a window to a column less than the value returned
5599 by this function. This happens in an interactive call. */)
5601 register Lisp_Object arg
, set_minimum
;
5605 struct window
*w
= XWINDOW (selected_window
);
5608 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5610 arg
= Fprefix_numeric_value (arg
);
5612 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
5613 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5615 if (!NILP (set_minimum
))
5616 w
->min_hscroll
= w
->hscroll
;
5621 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 2, "P\np",
5622 doc
: /* Scroll selected window display ARG columns right.
5623 Default for ARG is window width minus 2.
5624 Value is the total amount of leftward horizontal scrolling in
5625 effect after the change.
5626 If SET_MINIMUM is non-nil, the new scroll amount becomes the
5627 lower bound for automatic scrolling, i.e. automatic scrolling
5628 will not scroll a window to a column less than the value returned
5629 by this function. This happens in an interactive call. */)
5631 register Lisp_Object arg
, set_minimum
;
5635 struct window
*w
= XWINDOW (selected_window
);
5638 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5640 arg
= Fprefix_numeric_value (arg
);
5642 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
5643 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5645 if (!NILP (set_minimum
))
5646 w
->min_hscroll
= w
->hscroll
;
5651 DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window
, Sminibuffer_selected_window
, 0, 0, 0,
5652 doc
: /* Return the window which was selected when entering the minibuffer.
5653 Returns nil, if current window is not a minibuffer window. */)
5656 if (minibuf_level
> 0
5657 && MINI_WINDOW_P (XWINDOW (selected_window
))
5658 && WINDOW_LIVE_P (minibuf_selected_window
))
5659 return minibuf_selected_window
;
5664 /* Value is the number of lines actually displayed in window W,
5665 as opposed to its height. */
5668 displayed_window_lines (w
)
5672 struct text_pos start
;
5673 int height
= window_box_height (w
);
5674 struct buffer
*old_buffer
;
5677 if (XBUFFER (w
->buffer
) != current_buffer
)
5679 old_buffer
= current_buffer
;
5680 set_buffer_internal (XBUFFER (w
->buffer
));
5685 /* In case W->start is out of the accessible range, do something
5686 reasonable. This happens in Info mode when Info-scroll-down
5687 calls (recenter -1) while W->start is 1. */
5688 if (XMARKER (w
->start
)->charpos
< BEGV
)
5689 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
5690 else if (XMARKER (w
->start
)->charpos
> ZV
)
5691 SET_TEXT_POS (start
, ZV
, ZV_BYTE
);
5693 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5695 start_display (&it
, w
, start
);
5696 move_it_vertically (&it
, height
);
5697 bottom_y
= line_bottom_y (&it
);
5699 /* rms: On a non-window display,
5700 the value of it.vpos at the bottom of the screen
5701 seems to be 1 larger than window_box_height (w).
5702 This kludge fixes a bug whereby (move-to-window-line -1)
5703 when ZV is on the last screen line
5704 moves to the previous screen line instead of the last one. */
5705 if (! FRAME_WINDOW_P (XFRAME (w
->frame
)))
5708 /* Add in empty lines at the bottom of the window. */
5709 if (bottom_y
< height
)
5711 int uy
= FRAME_LINE_HEIGHT (it
.f
);
5712 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
5716 set_buffer_internal (old_buffer
);
5722 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
5723 doc
: /* Center point in window and redisplay frame.
5724 With prefix argument ARG, recenter putting point on screen line ARG
5725 relative to the current window. If ARG is negative, it counts up from the
5726 bottom of the window. (ARG should be less than the height of the window.)
5728 If ARG is omitted or nil, erase the entire frame and then redraw with point
5729 in the center of the current window. If `auto-resize-tool-bars' is set to
5730 `grow-only', this resets the tool-bar's height to the minimum height needed.
5732 Just C-u as prefix means put point in the center of the window
5733 and redisplay normally--don't erase and redraw the frame. */)
5735 register Lisp_Object arg
;
5737 struct window
*w
= XWINDOW (selected_window
);
5738 struct buffer
*buf
= XBUFFER (w
->buffer
);
5739 struct buffer
*obuf
= current_buffer
;
5741 int charpos
, bytepos
;
5743 int this_scroll_margin
;
5745 /* If redisplay is suppressed due to an error, try again. */
5746 obuf
->display_error_modiff
= 0;
5752 /* Invalidate pixel data calculated for all compositions. */
5753 for (i
= 0; i
< n_compositions
; i
++)
5754 composition_table
[i
]->font
= NULL
;
5756 WINDOW_XFRAME (w
)->minimize_tool_bar_window_p
= 1;
5758 Fredraw_frame (WINDOW_FRAME (w
));
5759 SET_FRAME_GARBAGED (WINDOW_XFRAME (w
));
5762 else if (CONSP (arg
)) /* Just C-u. */
5766 arg
= Fprefix_numeric_value (arg
);
5771 set_buffer_internal (buf
);
5773 /* Do this after making BUF current
5774 in case scroll_margin is buffer-local. */
5775 this_scroll_margin
= max (0, scroll_margin
);
5776 this_scroll_margin
= min (this_scroll_margin
,
5777 XFASTINT (w
->total_lines
) / 4);
5779 /* Handle centering on a graphical frame specially. Such frames can
5780 have variable-height lines and centering point on the basis of
5781 line counts would lead to strange effects. */
5782 if (FRAME_WINDOW_P (XFRAME (w
->frame
)))
5789 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5790 start_display (&it
, w
, pt
);
5791 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
5792 charpos
= IT_CHARPOS (it
);
5793 bytepos
= IT_BYTEPOS (it
);
5800 int extra_line_spacing
;
5801 int h
= window_box_height (w
);
5803 iarg
= - max (-iarg
, this_scroll_margin
);
5805 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5806 start_display (&it
, w
, pt
);
5808 /* Be sure we have the exact height of the full line containing PT. */
5809 move_it_by_lines (&it
, 0, 1);
5811 /* The amount of pixels we have to move back is the window
5812 height minus what's displayed in the line containing PT,
5813 and the lines below. */
5816 move_it_by_lines (&it
, nlines
, 1);
5818 if (it
.vpos
== nlines
)
5822 /* Last line has no newline */
5823 h
-= line_bottom_y (&it
);
5827 /* Don't reserve space for extra line spacing of last line. */
5828 extra_line_spacing
= it
.max_extra_line_spacing
;
5830 /* If we can't move down NLINES lines because we hit
5831 the end of the buffer, count in some empty lines. */
5832 if (it
.vpos
< nlines
)
5835 extra_line_spacing
= it
.extra_line_spacing
;
5836 h
-= nlines
* (FRAME_LINE_HEIGHT (it
.f
) + extra_line_spacing
);
5841 /* Now find the new top line (starting position) of the window. */
5842 start_display (&it
, w
, pt
);
5844 move_it_vertically_backward (&it
, h
);
5846 /* If extra line spacing is present, we may move too far
5847 back. This causes the last line to be only partially
5848 visible (which triggers redisplay to recenter that line
5849 in the middle), so move forward.
5850 But ignore extra line spacing on last line, as it is not
5851 considered to be part of the visible height of the line.
5853 h
+= extra_line_spacing
;
5854 while (-it
.current_y
> h
)
5855 move_it_by_lines (&it
, 1, 1);
5857 charpos
= IT_CHARPOS (it
);
5858 bytepos
= IT_BYTEPOS (it
);
5862 struct position pos
;
5864 iarg
= max (iarg
, this_scroll_margin
);
5866 pos
= *vmotion (PT
, -iarg
, w
);
5867 charpos
= pos
.bufpos
;
5868 bytepos
= pos
.bytepos
;
5873 struct position pos
;
5874 int ht
= window_internal_height (w
);
5881 /* Don't let it get into the margin at either top or bottom. */
5882 iarg
= max (iarg
, this_scroll_margin
);
5883 iarg
= min (iarg
, ht
- this_scroll_margin
- 1);
5885 pos
= *vmotion (PT
, - iarg
, w
);
5886 charpos
= pos
.bufpos
;
5887 bytepos
= pos
.bytepos
;
5890 /* Set the new window start. */
5891 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
5892 w
->window_end_valid
= Qnil
;
5894 w
->optional_new_start
= Qt
;
5896 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
5897 w
->start_at_line_beg
= Qt
;
5899 w
->start_at_line_beg
= Qnil
;
5901 set_buffer_internal (obuf
);
5906 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
5908 doc
: /* Return the height in lines of the text display area of WINDOW.
5909 WINDOW defaults to the selected window.
5910 This doesn't include the mode-line (or header-line if any) or any
5911 partial-height lines in the text display area. */)
5915 struct window
*w
= decode_window (window
);
5916 int pixel_height
= window_box_height (w
);
5917 int line_height
= pixel_height
/ FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
5918 return make_number (line_height
);
5923 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
5925 doc
: /* Position point relative to window.
5926 With no argument, position point at center of window.
5927 An argument specifies vertical position within the window;
5928 zero means top of window, negative means relative to bottom of window. */)
5932 struct window
*w
= XWINDOW (selected_window
);
5936 int this_scroll_margin
;
5939 window
= selected_window
;
5940 start
= marker_position (w
->start
);
5941 if (start
< BEGV
|| start
> ZV
)
5943 int height
= window_internal_height (w
);
5944 Fvertical_motion (make_number (- (height
/ 2)), window
);
5945 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
5946 w
->start_at_line_beg
= Fbolp ();
5947 w
->force_start
= Qt
;
5950 Fgoto_char (w
->start
);
5952 lines
= displayed_window_lines (w
);
5955 this_scroll_margin
= max (0, scroll_margin
);
5956 this_scroll_margin
= min (this_scroll_margin
, lines
/ 4);
5960 XSETFASTINT (arg
, lines
/ 2);
5963 int iarg
= XINT (Fprefix_numeric_value (arg
));
5966 iarg
= iarg
+ lines
;
5968 #if 0 /* This code would prevent move-to-window-line from moving point
5969 to a place inside the scroll margins (which would cause the
5970 next redisplay to scroll). I wrote this code, but then concluded
5971 it is probably better not to install it. However, it is here
5972 inside #if 0 so as not to lose it. -- rms. */
5974 /* Don't let it get into the margin at either top or bottom. */
5975 iarg
= max (iarg
, this_scroll_margin
);
5976 iarg
= min (iarg
, lines
- this_scroll_margin
- 1);
5979 arg
= make_number (iarg
);
5982 /* Skip past a partially visible first line. */
5984 XSETINT (arg
, XINT (arg
) + 1);
5986 return Fvertical_motion (arg
, window
);
5991 /***********************************************************************
5992 Window Configuration
5993 ***********************************************************************/
5995 struct save_window_data
5997 EMACS_INT size_from_Lisp_Vector_struct
;
5998 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
5999 Lisp_Object frame_cols
, frame_lines
, frame_menu_bar_lines
;
6000 Lisp_Object frame_tool_bar_lines
;
6001 Lisp_Object selected_frame
;
6002 Lisp_Object current_window
;
6003 Lisp_Object current_buffer
;
6004 Lisp_Object minibuf_scroll_window
;
6005 Lisp_Object minibuf_selected_window
;
6006 Lisp_Object root_window
;
6007 Lisp_Object focus_frame
;
6008 /* Record the values of window-min-width and window-min-height
6009 so that window sizes remain consistent with them. */
6010 Lisp_Object min_width
, min_height
;
6011 /* A vector, each of whose elements is a struct saved_window
6013 Lisp_Object saved_windows
;
6016 /* This is saved as a Lisp_Vector */
6019 /* these first two must agree with struct Lisp_Vector in lisp.h */
6020 EMACS_INT size_from_Lisp_Vector_struct
;
6021 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
6024 Lisp_Object buffer
, start
, pointm
, mark
;
6025 Lisp_Object left_col
, top_line
, total_cols
, total_lines
;
6026 Lisp_Object hscroll
, min_hscroll
;
6027 Lisp_Object parent
, prev
;
6028 Lisp_Object start_at_line_beg
;
6029 Lisp_Object display_table
;
6030 Lisp_Object orig_top_line
, orig_total_lines
;
6031 Lisp_Object left_margin_cols
, right_margin_cols
;
6032 Lisp_Object left_fringe_width
, right_fringe_width
, fringes_outside_margins
;
6033 Lisp_Object scroll_bar_width
, vertical_scroll_bar_type
;
6034 Lisp_Object dedicated
;
6037 #define SAVED_WINDOW_N(swv,n) \
6038 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
6040 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
6041 doc
: /* Return t if OBJECT is a window-configuration object. */)
6045 return WINDOW_CONFIGURATIONP (object
) ? Qt
: Qnil
;
6048 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
6049 doc
: /* Return the frame that CONFIG, a window-configuration object, is about. */)
6053 register struct save_window_data
*data
;
6054 struct Lisp_Vector
*saved_windows
;
6056 CHECK_WINDOW_CONFIGURATION (config
);
6058 data
= (struct save_window_data
*) XVECTOR (config
);
6059 saved_windows
= XVECTOR (data
->saved_windows
);
6060 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
6063 DEFUN ("set-window-configuration", Fset_window_configuration
,
6064 Sset_window_configuration
, 1, 1, 0,
6065 doc
: /* Set the configuration of windows and buffers as specified by CONFIGURATION.
6066 CONFIGURATION must be a value previously returned
6067 by `current-window-configuration' (which see).
6068 If CONFIGURATION was made from a frame that is now deleted,
6069 only frame-independent values can be restored. In this case,
6070 the return value is nil. Otherwise the value is t. */)
6072 Lisp_Object configuration
;
6074 register struct save_window_data
*data
;
6075 struct Lisp_Vector
*saved_windows
;
6076 Lisp_Object new_current_buffer
;
6081 CHECK_WINDOW_CONFIGURATION (configuration
);
6083 data
= (struct save_window_data
*) XVECTOR (configuration
);
6084 saved_windows
= XVECTOR (data
->saved_windows
);
6086 new_current_buffer
= data
->current_buffer
;
6087 if (NILP (XBUFFER (new_current_buffer
)->name
))
6088 new_current_buffer
= Qnil
;
6091 if (XBUFFER (new_current_buffer
) == current_buffer
)
6092 /* The code further down "preserves point" by saving here PT in
6093 old_point and then setting it later back into PT. When the
6094 current-selected-window and the final-selected-window both show
6095 the current buffer, this suffers from the problem that the
6096 current PT is the window-point of the current-selected-window,
6097 while the final PT is the point of the final-selected-window, so
6098 this copy from one PT to the other would end up moving the
6099 window-point of the final-selected-window to the window-point of
6100 the current-selected-window. So we have to be careful which
6101 point of the current-buffer we copy into old_point. */
6102 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
6103 && WINDOWP (selected_window
)
6104 && EQ (XWINDOW (selected_window
)->buffer
, new_current_buffer
)
6105 && !EQ (selected_window
, data
->current_window
))
6106 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
6110 /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of
6111 point in new_current_buffer as of the last time this buffer was
6112 used. This can be non-deterministic since it can be changed by
6113 things like jit-lock by mere temporary selection of some random
6114 window that happens to show this buffer.
6115 So if possible we want this arbitrary choice of "which point" to
6116 be the one from the to-be-selected-window so as to prevent this
6117 window's cursor from being copied from another window. */
6118 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
6119 /* If current_window = selected_window, its point is in BUF_PT. */
6120 && !EQ (selected_window
, data
->current_window
))
6121 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
6123 old_point
= BUF_PT (XBUFFER (new_current_buffer
));
6126 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
6129 /* If f is a dead frame, don't bother rebuilding its window tree.
6130 However, there is other stuff we should still try to do below. */
6131 if (FRAME_LIVE_P (f
))
6133 register struct window
*w
;
6134 register struct saved_window
*p
;
6135 struct window
*root_window
;
6136 struct window
**leaf_windows
;
6140 /* If the frame has been resized since this window configuration was
6141 made, we change the frame to the size specified in the
6142 configuration, restore the configuration, and then resize it
6143 back. We keep track of the prevailing height in these variables. */
6144 int previous_frame_lines
= FRAME_LINES (f
);
6145 int previous_frame_cols
= FRAME_COLS (f
);
6146 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
6147 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
6149 /* The mouse highlighting code could get screwed up
6150 if it runs during this. */
6153 if (XFASTINT (data
->frame_lines
) != previous_frame_lines
6154 || XFASTINT (data
->frame_cols
) != previous_frame_cols
)
6155 change_frame_size (f
, XFASTINT (data
->frame_lines
),
6156 XFASTINT (data
->frame_cols
), 0, 0, 0);
6157 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
6158 if (XFASTINT (data
->frame_menu_bar_lines
)
6159 != previous_frame_menu_bar_lines
)
6160 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
6161 #ifdef HAVE_WINDOW_SYSTEM
6162 if (XFASTINT (data
->frame_tool_bar_lines
)
6163 != previous_frame_tool_bar_lines
)
6164 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
6168 /* "Swap out" point from the selected window's buffer
6169 into the window itself. (Normally the pointm of the selected
6170 window holds garbage.) We do this now, before
6171 restoring the window contents, and prevent it from
6172 being done later on when we select a new window. */
6173 if (! NILP (XWINDOW (selected_window
)->buffer
))
6175 w
= XWINDOW (selected_window
);
6176 set_marker_both (w
->pointm
,
6178 BUF_PT (XBUFFER (w
->buffer
)),
6179 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6182 windows_or_buffers_changed
++;
6183 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
6185 /* Problem: Freeing all matrices and later allocating them again
6186 is a serious redisplay flickering problem. What we would
6187 really like to do is to free only those matrices not reused
6189 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
6191 = (struct window
**) alloca (count_windows (root_window
)
6192 * sizeof (struct window
*));
6193 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
6195 /* Temporarily avoid any problems with windows that are smaller
6196 than they are supposed to be. */
6197 window_min_height
= 1;
6198 window_min_width
= 1;
6201 Mark all windows now on frame as "deleted".
6202 Restoring the new configuration "undeletes" any that are in it.
6204 Save their current buffers in their height fields, since we may
6205 need it later, if a buffer saved in the configuration is now
6207 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6209 for (k
= 0; k
< saved_windows
->size
; k
++)
6211 p
= SAVED_WINDOW_N (saved_windows
, k
);
6212 w
= XWINDOW (p
->window
);
6215 if (!NILP (p
->parent
))
6216 w
->parent
= SAVED_WINDOW_N (saved_windows
,
6217 XFASTINT (p
->parent
))->window
;
6221 if (!NILP (p
->prev
))
6223 w
->prev
= SAVED_WINDOW_N (saved_windows
,
6224 XFASTINT (p
->prev
))->window
;
6225 XWINDOW (w
->prev
)->next
= p
->window
;
6230 if (!NILP (w
->parent
))
6232 if (EQ (p
->total_cols
, XWINDOW (w
->parent
)->total_cols
))
6234 XWINDOW (w
->parent
)->vchild
= p
->window
;
6235 XWINDOW (w
->parent
)->hchild
= Qnil
;
6239 XWINDOW (w
->parent
)->hchild
= p
->window
;
6240 XWINDOW (w
->parent
)->vchild
= Qnil
;
6245 /* If we squirreled away the buffer in the window's height,
6247 if (BUFFERP (w
->total_lines
))
6248 w
->buffer
= w
->total_lines
;
6249 w
->left_col
= p
->left_col
;
6250 w
->top_line
= p
->top_line
;
6251 w
->total_cols
= p
->total_cols
;
6252 w
->total_lines
= p
->total_lines
;
6253 w
->hscroll
= p
->hscroll
;
6254 w
->min_hscroll
= p
->min_hscroll
;
6255 w
->display_table
= p
->display_table
;
6256 w
->orig_top_line
= p
->orig_top_line
;
6257 w
->orig_total_lines
= p
->orig_total_lines
;
6258 w
->left_margin_cols
= p
->left_margin_cols
;
6259 w
->right_margin_cols
= p
->right_margin_cols
;
6260 w
->left_fringe_width
= p
->left_fringe_width
;
6261 w
->right_fringe_width
= p
->right_fringe_width
;
6262 w
->fringes_outside_margins
= p
->fringes_outside_margins
;
6263 w
->scroll_bar_width
= p
->scroll_bar_width
;
6264 w
->vertical_scroll_bar_type
= p
->vertical_scroll_bar_type
;
6265 w
->dedicated
= p
->dedicated
;
6266 XSETFASTINT (w
->last_modified
, 0);
6267 XSETFASTINT (w
->last_overlay_modified
, 0);
6269 /* Reinstall the saved buffer and pointers into it. */
6270 if (NILP (p
->buffer
))
6271 w
->buffer
= p
->buffer
;
6274 if (!NILP (XBUFFER (p
->buffer
)->name
))
6275 /* If saved buffer is alive, install it. */
6277 w
->buffer
= p
->buffer
;
6278 w
->start_at_line_beg
= p
->start_at_line_beg
;
6279 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
6280 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
6281 Fset_marker (XBUFFER (w
->buffer
)->mark
,
6282 p
->mark
, w
->buffer
);
6284 /* As documented in Fcurrent_window_configuration, don't
6285 restore the location of point in the buffer which was
6286 current when the window configuration was recorded. */
6287 if (!EQ (p
->buffer
, new_current_buffer
)
6288 && XBUFFER (p
->buffer
) == current_buffer
)
6289 Fgoto_char (w
->pointm
);
6291 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
6292 /* Else unless window has a live buffer, get one. */
6294 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
6295 /* This will set the markers to beginning of visible
6297 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
6298 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
6299 w
->start_at_line_beg
= Qt
;
6302 /* Keeping window's old buffer; make sure the markers
6305 /* Set window markers at start of visible range. */
6306 if (XMARKER (w
->start
)->buffer
== 0)
6307 set_marker_restricted (w
->start
, make_number (0),
6309 if (XMARKER (w
->pointm
)->buffer
== 0)
6310 set_marker_restricted_both (w
->pointm
, w
->buffer
,
6311 BUF_PT (XBUFFER (w
->buffer
)),
6312 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6313 w
->start_at_line_beg
= Qt
;
6318 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
6319 /* Prevent "swapping out point" in the old selected window
6320 using the buffer that has been restored into it.
6321 We already swapped out point that from that window's old buffer. */
6322 selected_window
= Qnil
;
6324 /* Arrange *not* to restore point in the buffer that was
6325 current when the window configuration was saved. */
6326 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
))
6327 set_marker_restricted (XWINDOW (data
->current_window
)->pointm
,
6328 make_number (old_point
),
6329 XWINDOW (data
->current_window
)->buffer
);
6331 Fselect_window (data
->current_window
, Qnil
);
6332 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
6335 if (NILP (data
->focus_frame
)
6336 || (FRAMEP (data
->focus_frame
)
6337 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
6338 Fredirect_frame_focus (frame
, data
->focus_frame
);
6340 #if 0 /* I don't understand why this is needed, and it causes problems
6341 when the frame's old selected window has been deleted. */
6342 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
6343 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
6347 /* Set the screen height to the value it had before this function. */
6348 if (previous_frame_lines
!= FRAME_LINES (f
)
6349 || previous_frame_cols
!= FRAME_COLS (f
))
6350 change_frame_size (f
, previous_frame_lines
, previous_frame_cols
,
6352 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
6353 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
6354 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
6356 #ifdef HAVE_WINDOW_SYSTEM
6357 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
6358 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
6363 /* Now, free glyph matrices in windows that were not reused. */
6364 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
6366 if (NILP (leaf_windows
[i
]->buffer
))
6368 /* Assert it's not reused as a combination. */
6369 xassert (NILP (leaf_windows
[i
]->hchild
)
6370 && NILP (leaf_windows
[i
]->vchild
));
6371 free_window_matrices (leaf_windows
[i
]);
6373 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
6381 /* Fselect_window will have made f the selected frame, so we
6382 reselect the proper frame here. Fhandle_switch_frame will change the
6383 selected window too, but that doesn't make the call to
6384 Fselect_window above totally superfluous; it still sets f's
6386 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
6387 do_switch_frame (data
->selected_frame
, 0, 0);
6389 if (! NILP (Vwindow_configuration_change_hook
)
6390 && ! NILP (Vrun_hooks
))
6391 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
6394 if (!NILP (new_current_buffer
))
6395 Fset_buffer (new_current_buffer
);
6397 /* Restore the minimum heights recorded in the configuration. */
6398 window_min_height
= XINT (data
->min_height
);
6399 window_min_width
= XINT (data
->min_width
);
6401 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
6402 minibuf_selected_window
= data
->minibuf_selected_window
;
6404 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
6407 /* Mark all windows now on frame as deleted
6408 by setting their buffers to nil. */
6411 delete_all_subwindows (w
)
6412 register struct window
*w
;
6414 if (!NILP (w
->next
))
6415 delete_all_subwindows (XWINDOW (w
->next
));
6416 if (!NILP (w
->vchild
))
6417 delete_all_subwindows (XWINDOW (w
->vchild
));
6418 if (!NILP (w
->hchild
))
6419 delete_all_subwindows (XWINDOW (w
->hchild
));
6421 w
->total_lines
= w
->buffer
; /* See Fset_window_configuration for excuse. */
6423 if (!NILP (w
->buffer
))
6426 /* We set all three of these fields to nil, to make sure that we can
6427 distinguish this dead window from any live window. Live leaf
6428 windows will have buffer set, and combination windows will have
6429 vchild or hchild set. */
6434 Vwindow_list
= Qnil
;
6438 count_windows (window
)
6439 register struct window
*window
;
6441 register int count
= 1;
6442 if (!NILP (window
->next
))
6443 count
+= count_windows (XWINDOW (window
->next
));
6444 if (!NILP (window
->vchild
))
6445 count
+= count_windows (XWINDOW (window
->vchild
));
6446 if (!NILP (window
->hchild
))
6447 count
+= count_windows (XWINDOW (window
->hchild
));
6452 /* Fill vector FLAT with leaf windows under W, starting at index I.
6453 Value is last index + 1. */
6456 get_leaf_windows (w
, flat
, i
)
6458 struct window
**flat
;
6463 if (!NILP (w
->hchild
))
6464 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
6465 else if (!NILP (w
->vchild
))
6466 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
6470 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6477 /* Return a pointer to the glyph W's physical cursor is on. Value is
6478 null if W's current matrix is invalid, so that no meaningfull glyph
6482 get_phys_cursor_glyph (w
)
6485 struct glyph_row
*row
;
6486 struct glyph
*glyph
;
6488 if (w
->phys_cursor
.vpos
>= 0
6489 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
6490 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
6492 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
6493 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
6502 save_window_save (window
, vector
, i
)
6504 struct Lisp_Vector
*vector
;
6507 register struct saved_window
*p
;
6508 register struct window
*w
;
6509 register Lisp_Object tem
;
6511 for (;!NILP (window
); window
= w
->next
)
6513 p
= SAVED_WINDOW_N (vector
, i
);
6514 w
= XWINDOW (window
);
6516 XSETFASTINT (w
->temslot
, i
); i
++;
6518 p
->buffer
= w
->buffer
;
6519 p
->left_col
= w
->left_col
;
6520 p
->top_line
= w
->top_line
;
6521 p
->total_cols
= w
->total_cols
;
6522 p
->total_lines
= w
->total_lines
;
6523 p
->hscroll
= w
->hscroll
;
6524 p
->min_hscroll
= w
->min_hscroll
;
6525 p
->display_table
= w
->display_table
;
6526 p
->orig_top_line
= w
->orig_top_line
;
6527 p
->orig_total_lines
= w
->orig_total_lines
;
6528 p
->left_margin_cols
= w
->left_margin_cols
;
6529 p
->right_margin_cols
= w
->right_margin_cols
;
6530 p
->left_fringe_width
= w
->left_fringe_width
;
6531 p
->right_fringe_width
= w
->right_fringe_width
;
6532 p
->fringes_outside_margins
= w
->fringes_outside_margins
;
6533 p
->scroll_bar_width
= w
->scroll_bar_width
;
6534 p
->vertical_scroll_bar_type
= w
->vertical_scroll_bar_type
;
6535 p
->dedicated
= w
->dedicated
;
6536 if (!NILP (w
->buffer
))
6538 /* Save w's value of point in the window configuration.
6539 If w is the selected window, then get the value of point
6540 from the buffer; pointm is garbage in the selected window. */
6541 if (EQ (window
, selected_window
))
6543 p
->pointm
= Fmake_marker ();
6544 set_marker_both (p
->pointm
, w
->buffer
,
6545 BUF_PT (XBUFFER (w
->buffer
)),
6546 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6549 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
6551 p
->start
= Fcopy_marker (w
->start
, Qnil
);
6552 p
->start_at_line_beg
= w
->start_at_line_beg
;
6554 tem
= XBUFFER (w
->buffer
)->mark
;
6555 p
->mark
= Fcopy_marker (tem
, Qnil
);
6562 p
->start_at_line_beg
= Qnil
;
6565 if (NILP (w
->parent
))
6568 p
->parent
= XWINDOW (w
->parent
)->temslot
;
6573 p
->prev
= XWINDOW (w
->prev
)->temslot
;
6575 if (!NILP (w
->vchild
))
6576 i
= save_window_save (w
->vchild
, vector
, i
);
6577 if (!NILP (w
->hchild
))
6578 i
= save_window_save (w
->hchild
, vector
, i
);
6584 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
6585 Scurrent_window_configuration
, 0, 1, 0,
6586 doc
: /* Return an object representing the current window configuration of FRAME.
6587 If FRAME is nil or omitted, use the selected frame.
6588 This describes the number of windows, their sizes and current buffers,
6589 and for each displayed buffer, where display starts, and the positions of
6590 point and mark. An exception is made for point in the current buffer:
6591 its value is -not- saved.
6592 This also records the currently selected frame, and FRAME's focus
6593 redirection (see `redirect-frame-focus'). */)
6597 register Lisp_Object tem
;
6598 register int n_windows
;
6599 register struct save_window_data
*data
;
6600 register struct Lisp_Vector
*vec
;
6605 frame
= selected_frame
;
6606 CHECK_LIVE_FRAME (frame
);
6609 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6610 vec
= allocate_other_vector (VECSIZE (struct save_window_data
));
6611 data
= (struct save_window_data
*)vec
;
6613 XSETFASTINT (data
->frame_cols
, FRAME_COLS (f
));
6614 XSETFASTINT (data
->frame_lines
, FRAME_LINES (f
));
6615 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
6616 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
6617 data
->selected_frame
= selected_frame
;
6618 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
6619 XSETBUFFER (data
->current_buffer
, current_buffer
);
6620 data
->minibuf_scroll_window
= minibuf_level
> 0 ? Vminibuf_scroll_window
: Qnil
;
6621 data
->minibuf_selected_window
= minibuf_level
> 0 ? minibuf_selected_window
: Qnil
;
6622 data
->root_window
= FRAME_ROOT_WINDOW (f
);
6623 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
6624 XSETINT (data
->min_height
, window_min_height
);
6625 XSETINT (data
->min_width
, window_min_width
);
6626 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
6627 data
->saved_windows
= tem
;
6628 for (i
= 0; i
< n_windows
; i
++)
6629 XVECTOR (tem
)->contents
[i
]
6630 = Fmake_vector (make_number (VECSIZE (struct saved_window
)), Qnil
);
6631 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
6632 XSETWINDOW_CONFIGURATION (tem
, data
);
6636 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
6638 doc
: /* Execute BODY, preserving window sizes and contents.
6639 Return the value of the last form in BODY.
6640 Restore which buffer appears in which window, where display starts,
6641 and the value of point and mark for each window.
6642 Also restore the choice of selected window.
6643 Also restore which buffer is current.
6644 Does not restore the value of point in current buffer.
6645 usage: (save-window-excursion BODY ...) */)
6649 register Lisp_Object val
;
6650 register int count
= SPECPDL_INDEX ();
6652 record_unwind_protect (Fset_window_configuration
,
6653 Fcurrent_window_configuration (Qnil
));
6654 val
= Fprogn (args
);
6655 return unbind_to (count
, val
);
6660 /***********************************************************************
6662 ***********************************************************************/
6668 Lisp_Object tail
= Qnil
;
6669 Lisp_Object result
= Qnil
;
6676 if (!NILP (w
->hchild
))
6677 wn
= Fcons (Qnil
, Fcons (Fwindow_edges (wn
),
6678 window_tree (XWINDOW (w
->hchild
))));
6679 else if (!NILP (w
->vchild
))
6680 wn
= Fcons (Qt
, Fcons (Fwindow_edges (wn
),
6681 window_tree (XWINDOW (w
->vchild
))));
6685 result
= tail
= Fcons (wn
, Qnil
);
6689 XSETCDR (tail
, Fcons (wn
, Qnil
));
6693 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6701 DEFUN ("window-tree", Fwindow_tree
, Swindow_tree
,
6703 doc
: /* Return the window tree for frame FRAME.
6705 The return value is a list of the form (ROOT MINI), where ROOT
6706 represents the window tree of the frame's root window, and MINI
6707 is the frame's minibuffer window.
6709 If the root window is not split, ROOT is the root window itself.
6710 Otherwise, ROOT is a list (DIR EDGES W1 W2 ...) where DIR is nil for a
6711 horizontal split, and t for a vertical split, EDGES gives the combined
6712 size and position of the subwindows in the split, and the rest of the
6713 elements are the subwindows in the split. Each of the subwindows may
6714 again be a window or a list representing a window split, and so on.
6715 EDGES is a list \(LEFT TOP RIGHT BOTTOM) as returned by `window-edges'.
6717 If FRAME is nil or omitted, return information on the currently
6725 frame
= selected_frame
;
6727 CHECK_FRAME (frame
);
6730 if (!FRAME_LIVE_P (f
))
6733 return window_tree (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6737 /***********************************************************************
6739 ***********************************************************************/
6741 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
6743 doc
: /* Set width of marginal areas of window WINDOW.
6744 If WINDOW is nil, set margins of the currently selected window.
6745 Second arg LEFT-WIDTH specifies the number of character cells to
6746 reserve for the left marginal area. Optional third arg RIGHT-WIDTH
6747 does the same for the right marginal area. A nil width parameter
6748 means no margin. */)
6749 (window
, left_width
, right_width
)
6750 Lisp_Object window
, left_width
, right_width
;
6752 struct window
*w
= decode_window (window
);
6754 /* Translate negative or zero widths to nil.
6755 Margins that are too wide have to be checked elsewhere. */
6757 if (!NILP (left_width
))
6759 CHECK_NUMBER (left_width
);
6760 if (XINT (left_width
) <= 0)
6764 if (!NILP (right_width
))
6766 CHECK_NUMBER (right_width
);
6767 if (XINT (right_width
) <= 0)
6771 if (!EQ (w
->left_margin_cols
, left_width
)
6772 || !EQ (w
->right_margin_cols
, right_width
))
6774 w
->left_margin_cols
= left_width
;
6775 w
->right_margin_cols
= right_width
;
6777 adjust_window_margins (w
);
6779 ++windows_or_buffers_changed
;
6780 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6787 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
6789 doc
: /* Get width of marginal areas of window WINDOW.
6790 If WINDOW is omitted or nil, use the currently selected window.
6791 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).
6792 If a marginal area does not exist, its width will be returned
6797 struct window
*w
= decode_window (window
);
6798 return Fcons (w
->left_margin_cols
, w
->right_margin_cols
);
6803 /***********************************************************************
6805 ***********************************************************************/
6807 DEFUN ("set-window-fringes", Fset_window_fringes
, Sset_window_fringes
,
6809 doc
: /* Set the fringe widths of window WINDOW.
6810 If WINDOW is nil, set the fringe widths of the currently selected
6812 Second arg LEFT-WIDTH specifies the number of pixels to reserve for
6813 the left fringe. Optional third arg RIGHT-WIDTH specifies the right
6814 fringe width. If a fringe width arg is nil, that means to use the
6815 frame's default fringe width. Default fringe widths can be set with
6816 the command `set-fringe-style'.
6817 If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes
6818 outside of the display margins. By default, fringes are drawn between
6819 display marginal areas and the text area. */)
6820 (window
, left_width
, right_width
, outside_margins
)
6821 Lisp_Object window
, left_width
, right_width
, outside_margins
;
6823 struct window
*w
= decode_window (window
);
6825 if (!NILP (left_width
))
6826 CHECK_NATNUM (left_width
);
6827 if (!NILP (right_width
))
6828 CHECK_NATNUM (right_width
);
6830 /* Do nothing on a tty. */
6831 if (FRAME_WINDOW_P (WINDOW_XFRAME (w
))
6832 && (!EQ (w
->left_fringe_width
, left_width
)
6833 || !EQ (w
->right_fringe_width
, right_width
)
6834 || !EQ (w
->fringes_outside_margins
, outside_margins
)))
6836 w
->left_fringe_width
= left_width
;
6837 w
->right_fringe_width
= right_width
;
6838 w
->fringes_outside_margins
= outside_margins
;
6840 adjust_window_margins (w
);
6842 clear_glyph_matrix (w
->current_matrix
);
6843 w
->window_end_valid
= Qnil
;
6845 ++windows_or_buffers_changed
;
6846 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6853 DEFUN ("window-fringes", Fwindow_fringes
, Swindow_fringes
,
6855 doc
: /* Get width of fringes of window WINDOW.
6856 If WINDOW is omitted or nil, use the currently selected window.
6857 Value is a list of the form (LEFT-WIDTH RIGHT-WIDTH OUTSIDE-MARGINS). */)
6861 struct window
*w
= decode_window (window
);
6863 return Fcons (make_number (WINDOW_LEFT_FRINGE_WIDTH (w
)),
6864 Fcons (make_number (WINDOW_RIGHT_FRINGE_WIDTH (w
)),
6865 Fcons ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6866 ? Qt
: Qnil
), Qnil
)));
6871 /***********************************************************************
6873 ***********************************************************************/
6875 DEFUN ("set-window-scroll-bars", Fset_window_scroll_bars
, Sset_window_scroll_bars
,
6877 doc
: /* Set width and type of scroll bars of window WINDOW.
6878 If window is nil, set scroll bars of the currently selected window.
6879 Second parameter WIDTH specifies the pixel width for the scroll bar;
6880 this is automatically adjusted to a multiple of the frame column width.
6881 Third parameter VERTICAL-TYPE specifies the type of the vertical scroll
6882 bar: left, right, or nil.
6883 If WIDTH is nil, use the frame's scroll-bar width.
6884 If VERTICAL-TYPE is t, use the frame's scroll-bar type.
6885 Fourth parameter HORIZONTAL-TYPE is currently unused. */)
6886 (window
, width
, vertical_type
, horizontal_type
)
6887 Lisp_Object window
, width
, vertical_type
, horizontal_type
;
6889 struct window
*w
= decode_window (window
);
6893 CHECK_NATNUM (width
);
6895 if (XINT (width
) == 0)
6896 vertical_type
= Qnil
;
6899 if (!(EQ (vertical_type
, Qnil
)
6900 || EQ (vertical_type
, Qleft
)
6901 || EQ (vertical_type
, Qright
)
6902 || EQ (vertical_type
, Qt
)))
6903 error ("Invalid type of vertical scroll bar");
6905 if (!EQ (w
->scroll_bar_width
, width
)
6906 || !EQ (w
->vertical_scroll_bar_type
, vertical_type
))
6908 w
->scroll_bar_width
= width
;
6909 w
->vertical_scroll_bar_type
= vertical_type
;
6911 adjust_window_margins (w
);
6913 clear_glyph_matrix (w
->current_matrix
);
6914 w
->window_end_valid
= Qnil
;
6916 ++windows_or_buffers_changed
;
6917 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6924 DEFUN ("window-scroll-bars", Fwindow_scroll_bars
, Swindow_scroll_bars
,
6926 doc
: /* Get width and type of scroll bars of window WINDOW.
6927 If WINDOW is omitted or nil, use the currently selected window.
6928 Value is a list of the form (WIDTH COLS VERTICAL-TYPE HORIZONTAL-TYPE).
6929 If WIDTH is nil or TYPE is t, the window is using the frame's corresponding
6934 struct window
*w
= decode_window (window
);
6935 return Fcons (make_number ((WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6936 ? WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6937 : WINDOW_SCROLL_BAR_AREA_WIDTH (w
))),
6938 Fcons (make_number (WINDOW_SCROLL_BAR_COLS (w
)),
6939 Fcons (w
->vertical_scroll_bar_type
,
6940 Fcons (Qnil
, Qnil
))));
6945 /***********************************************************************
6947 ***********************************************************************/
6949 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 2, 0,
6950 doc
: /* Return the amount by which WINDOW is scrolled vertically.
6951 Use the selected window if WINDOW is nil or omitted.
6952 Normally, value is a multiple of the canonical character height of WINDOW;
6953 optional second arg PIXELS-P means value is measured in pixels. */)
6955 Lisp_Object window
, pixels_p
;
6962 window
= selected_window
;
6964 CHECK_WINDOW (window
);
6965 w
= XWINDOW (window
);
6966 f
= XFRAME (w
->frame
);
6968 if (FRAME_WINDOW_P (f
))
6969 result
= (NILP (pixels_p
)
6970 ? FRAME_CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
)
6971 : make_number (-w
->vscroll
));
6973 result
= make_number (0);
6978 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
6980 doc
: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL.
6981 WINDOW nil means use the selected window. Normally, VSCROLL is a
6982 non-negative multiple of the canonical character height of WINDOW;
6983 optional third arg PIXELS-P non-nil means that VSCROLL is in pixels.
6984 If PIXELS-P is nil, VSCROLL may have to be rounded so that it
6985 corresponds to an integral number of pixels. The return value is the
6986 result of this rounding.
6987 If PIXELS-P is non-nil, the return value is VSCROLL. */)
6988 (window
, vscroll
, pixels_p
)
6989 Lisp_Object window
, vscroll
, pixels_p
;
6995 window
= selected_window
;
6997 CHECK_WINDOW (window
);
6998 CHECK_NUMBER_OR_FLOAT (vscroll
);
7000 w
= XWINDOW (window
);
7001 f
= XFRAME (w
->frame
);
7003 if (FRAME_WINDOW_P (f
))
7005 int old_dy
= w
->vscroll
;
7007 w
->vscroll
= - (NILP (pixels_p
)
7008 ? FRAME_LINE_HEIGHT (f
) * XFLOATINT (vscroll
)
7009 : XFLOATINT (vscroll
));
7010 w
->vscroll
= min (w
->vscroll
, 0);
7012 if (w
->vscroll
!= old_dy
)
7014 /* Adjust glyph matrix of the frame if the virtual display
7015 area becomes larger than before. */
7016 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
7019 /* Prevent redisplay shortcuts. */
7020 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
7024 return Fwindow_vscroll (window
, pixels_p
);
7028 /* Call FN for all leaf windows on frame F. FN is called with the
7029 first argument being a pointer to the leaf window, and with
7030 additional argument USER_DATA. Stops when FN returns 0. */
7033 foreach_window (f
, fn
, user_data
)
7035 int (* fn
) P_ ((struct window
*, void *));
7038 /* Fdelete_frame may set FRAME_ROOT_WINDOW (f) to Qnil. */
7039 if (WINDOWP (FRAME_ROOT_WINDOW (f
)))
7040 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
7044 /* Helper function for foreach_window. Call FN for all leaf windows
7045 reachable from W. FN is called with the first argument being a
7046 pointer to the leaf window, and with additional argument USER_DATA.
7047 Stop when FN returns 0. Value is 0 if stopped by FN. */
7050 foreach_window_1 (w
, fn
, user_data
)
7052 int (* fn
) P_ ((struct window
*, void *));
7057 for (cont
= 1; w
&& cont
;)
7059 if (!NILP (w
->hchild
))
7060 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
7061 else if (!NILP (w
->vchild
))
7062 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
7064 cont
= fn (w
, user_data
);
7066 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
7073 /* Freeze or unfreeze the window start of W unless it is a
7074 mini-window or the selected window. FREEZE_P non-null means freeze
7075 the window start. */
7078 freeze_window_start (w
, freeze_p
)
7082 if (w
== XWINDOW (selected_window
)
7083 || MINI_WINDOW_P (w
)
7084 || (MINI_WINDOW_P (XWINDOW (selected_window
))
7085 && ! NILP (Vminibuf_scroll_window
)
7086 && w
== XWINDOW (Vminibuf_scroll_window
)))
7089 w
->frozen_window_start_p
= freeze_p
!= NULL
;
7094 /* Freeze or unfreeze the window starts of all leaf windows on frame
7095 F, except the selected window and a mini-window. FREEZE_P non-zero
7096 means freeze the window start. */
7099 freeze_window_starts (f
, freeze_p
)
7103 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
7107 /***********************************************************************
7109 ***********************************************************************/
7111 /* Return 1 if window configurations C1 and C2
7112 describe the same state of affairs. This is used by Fequal. */
7115 compare_window_configurations (c1
, c2
, ignore_positions
)
7117 int ignore_positions
;
7119 register struct save_window_data
*d1
, *d2
;
7120 struct Lisp_Vector
*sw1
, *sw2
;
7123 CHECK_WINDOW_CONFIGURATION (c1
);
7124 CHECK_WINDOW_CONFIGURATION (c2
);
7126 d1
= (struct save_window_data
*) XVECTOR (c1
);
7127 d2
= (struct save_window_data
*) XVECTOR (c2
);
7128 sw1
= XVECTOR (d1
->saved_windows
);
7129 sw2
= XVECTOR (d2
->saved_windows
);
7131 if (! EQ (d1
->frame_cols
, d2
->frame_cols
))
7133 if (! EQ (d1
->frame_lines
, d2
->frame_lines
))
7135 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
7137 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
7139 /* Don't compare the current_window field directly.
7140 Instead see w1_is_current and w2_is_current, below. */
7141 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
7143 if (! ignore_positions
)
7145 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
7147 if (! EQ (d1
->minibuf_selected_window
, d2
->minibuf_selected_window
))
7150 /* Don't compare the root_window field.
7151 We don't require the two configurations
7152 to use the same window object,
7153 and the two root windows must be equivalent
7154 if everything else compares equal. */
7155 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
7157 if (! EQ (d1
->min_width
, d2
->min_width
))
7159 if (! EQ (d1
->min_height
, d2
->min_height
))
7162 /* Verify that the two confis have the same number of windows. */
7163 if (sw1
->size
!= sw2
->size
)
7166 for (i
= 0; i
< sw1
->size
; i
++)
7168 struct saved_window
*p1
, *p2
;
7169 int w1_is_current
, w2_is_current
;
7171 p1
= SAVED_WINDOW_N (sw1
, i
);
7172 p2
= SAVED_WINDOW_N (sw2
, i
);
7174 /* Verify that the current windows in the two
7175 configurations correspond to each other. */
7176 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
7177 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
7179 if (w1_is_current
!= w2_is_current
)
7182 /* Verify that the corresponding windows do match. */
7183 if (! EQ (p1
->buffer
, p2
->buffer
))
7185 if (! EQ (p1
->left_col
, p2
->left_col
))
7187 if (! EQ (p1
->top_line
, p2
->top_line
))
7189 if (! EQ (p1
->total_cols
, p2
->total_cols
))
7191 if (! EQ (p1
->total_lines
, p2
->total_lines
))
7193 if (! EQ (p1
->display_table
, p2
->display_table
))
7195 if (! EQ (p1
->parent
, p2
->parent
))
7197 if (! EQ (p1
->prev
, p2
->prev
))
7199 if (! ignore_positions
)
7201 if (! EQ (p1
->hscroll
, p2
->hscroll
))
7203 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
7205 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
7207 if (NILP (Fequal (p1
->start
, p2
->start
)))
7209 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
7211 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
7214 if (! EQ (p1
->left_margin_cols
, p2
->left_margin_cols
))
7216 if (! EQ (p1
->right_margin_cols
, p2
->right_margin_cols
))
7218 if (! EQ (p1
->left_fringe_width
, p2
->left_fringe_width
))
7220 if (! EQ (p1
->right_fringe_width
, p2
->right_fringe_width
))
7222 if (! EQ (p1
->fringes_outside_margins
, p2
->fringes_outside_margins
))
7224 if (! EQ (p1
->scroll_bar_width
, p2
->scroll_bar_width
))
7226 if (! EQ (p1
->vertical_scroll_bar_type
, p2
->vertical_scroll_bar_type
))
7233 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
7234 Scompare_window_configurations
, 2, 2, 0,
7235 doc
: /* Compare two window configurations as regards the structure of windows.
7236 This function ignores details such as the values of point and mark
7237 and scrolling positions. */)
7241 if (compare_window_configurations (x
, y
, 1))
7249 struct frame
*f
= make_initial_frame ();
7250 XSETFRAME (selected_frame
, f
);
7251 Vterminal_frame
= selected_frame
;
7252 minibuf_window
= f
->minibuffer_window
;
7253 selected_window
= f
->selected_window
;
7254 last_nonminibuf_frame
= f
;
7256 window_initialized
= 1;
7262 Vwindow_list
= Qnil
;
7268 Qscroll_up
= intern ("scroll-up");
7269 staticpro (&Qscroll_up
);
7271 Qscroll_down
= intern ("scroll-down");
7272 staticpro (&Qscroll_down
);
7274 Qwindow_size_fixed
= intern ("window-size-fixed");
7275 staticpro (&Qwindow_size_fixed
);
7276 Fset (Qwindow_size_fixed
, Qnil
);
7278 staticpro (&Qwindow_configuration_change_hook
);
7279 Qwindow_configuration_change_hook
7280 = intern ("window-configuration-change-hook");
7282 Qwindowp
= intern ("windowp");
7283 staticpro (&Qwindowp
);
7285 Qwindow_configuration_p
= intern ("window-configuration-p");
7286 staticpro (&Qwindow_configuration_p
);
7288 Qwindow_live_p
= intern ("window-live-p");
7289 staticpro (&Qwindow_live_p
);
7291 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
7292 staticpro (&Qtemp_buffer_show_hook
);
7294 staticpro (&Vwindow_list
);
7296 minibuf_selected_window
= Qnil
;
7297 staticpro (&minibuf_selected_window
);
7299 window_scroll_pixel_based_preserve_y
= -1;
7301 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
7302 doc
: /* Non-nil means call as function to display a help buffer.
7303 The function is called with one argument, the buffer to be displayed.
7304 Used by `with-output-to-temp-buffer'.
7305 If this function is used, then it must do the entire job of showing
7306 the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */);
7307 Vtemp_buffer_show_function
= Qnil
;
7309 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
7310 doc
: /* If non-nil, function to call to handle `display-buffer'.
7311 It will receive two args, the buffer and a flag which if non-nil means
7312 that the currently selected window is not acceptable.
7313 It should choose or create a window, display the specified buffer in it,
7314 and return the window.
7315 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'
7316 work using this function. */);
7317 Vdisplay_buffer_function
= Qnil
;
7319 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
7320 doc
: /* *If non-nil, `display-buffer' should even the window heights.
7321 If nil, `display-buffer' will leave the window configuration alone. */);
7322 Veven_window_heights
= Qt
;
7324 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
7325 doc
: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */);
7326 Vminibuf_scroll_window
= Qnil
;
7328 DEFVAR_BOOL ("mode-line-in-non-selected-windows", &mode_line_in_non_selected_windows
,
7329 doc
: /* Non-nil means to use `mode-line-inactive' face in non-selected windows.
7330 If the minibuffer is active, the `minibuffer-scroll-window' mode line
7331 is displayed in the `mode-line' face. */);
7332 mode_line_in_non_selected_windows
= 1;
7334 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
7335 doc
: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */);
7336 Vother_window_scroll_buffer
= Qnil
;
7338 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
7339 doc
: /* *Non-nil means `display-buffer' should make a separate frame. */);
7342 DEFVAR_BOOL ("auto-window-vscroll", &auto_window_vscroll_p
,
7343 doc
: /* *Non-nil means to automatically adjust `window-vscroll' to view tall lines. */);
7344 auto_window_vscroll_p
= 1;
7346 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
7347 doc
: /* *Non-nil means `display-buffer' should reuse frames.
7348 If the buffer in question is already displayed in a frame, raise that frame. */);
7349 display_buffer_reuse_frames
= 0;
7351 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
7352 doc
: /* Function to call to handle automatic new frame creation.
7353 It is called with no arguments and should return a newly created frame.
7355 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'
7356 where `pop-up-frame-alist' would hold the default frame parameters. */);
7357 Vpop_up_frame_function
= Qnil
;
7359 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
7360 doc
: /* *List of buffer names that should have their own special frames.
7361 Displaying a buffer with `display-buffer' or `pop-to-buffer',
7362 if its name is in this list, makes a special frame for it
7363 using `special-display-function'. See also `special-display-regexps'.
7365 An element of the list can be a list instead of just a string.
7366 There are two ways to use a list as an element:
7367 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)
7368 In the first case, the FRAME-PARAMETERS are pairs of the form
7369 \(PARAMETER . VALUE); these parameter values are used to create the frame.
7370 In the second case, FUNCTION is called with BUFFER as the first argument,
7371 followed by the OTHER-ARGS--it can display BUFFER in any way it likes.
7372 All this is done by the function found in `special-display-function'.
7374 If the specified frame parameters include (same-buffer . t), the
7375 buffer is displayed in the currently selected window. Otherwise, if
7376 they include (same-frame . t), the buffer is displayed in a new window
7377 in the currently selected frame.
7379 If this variable appears \"not to work\", because you add a name to it
7380 but that buffer still appears in the selected window, look at the
7381 values of `same-window-buffer-names' and `same-window-regexps'.
7382 Those variables take precedence over this one. */);
7383 Vspecial_display_buffer_names
= Qnil
;
7385 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
7386 doc
: /* *List of regexps saying which buffers should have their own special frames.
7387 When displaying a buffer with `display-buffer' or `pop-to-buffer',
7388 if any regexp in this list matches the buffer name, it makes a
7389 special frame for the buffer by calling `special-display-function'.
7391 An element of the list can be a list instead of just a string.
7392 There are two ways to use a list as an element:
7393 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)
7394 In the first case, the FRAME-PARAMETERS are pairs of the form
7395 \(PARAMETER . VALUE); these parameter values are used to create the frame.
7396 In the second case, FUNCTION is called with BUFFER as the first argument,
7397 followed by the OTHER-ARGS--it can display the buffer in any way it likes.
7398 All this is done by the function found in `special-display-function'.
7400 If the specified frame parameters include (same-buffer . t), the
7401 buffer is displayed in the currently selected window. Otherwise, if
7402 they include (same-frame . t), the buffer is displayed in a new window
7403 in the currently selected frame.
7405 If this variable appears \"not to work\", because you add a regexp to it
7406 but the matching buffers still appear in the selected window, look at the
7407 values of `same-window-buffer-names' and `same-window-regexps'.
7408 Those variables take precedence over this one. */);
7409 Vspecial_display_regexps
= Qnil
;
7411 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
7412 doc
: /* Function to call to make a new frame for a special buffer.
7413 It is called with two arguments, the buffer and optional buffer specific
7414 data, and should return a window displaying that buffer.
7415 The default value normally makes a separate frame for the buffer,
7416 using `special-display-frame-alist' to specify the frame parameters.
7417 But if the buffer specific data includes (same-buffer . t) then the
7418 buffer is displayed in the current selected window.
7419 Otherwise if it includes (same-frame . t) then the buffer is displayed in
7420 a new window in the currently selected frame.
7422 A buffer is special if it is listed in `special-display-buffer-names'
7423 or matches a regexp in `special-display-regexps'. */);
7424 Vspecial_display_function
= Qnil
;
7426 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
7427 doc
: /* *List of buffer names that should appear in the selected window.
7428 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'
7429 switches to it in the selected window, rather than making it appear
7430 in some other window.
7432 An element of the list can be a cons cell instead of just a string.
7433 Then the car must be a string, which specifies the buffer name.
7434 This is for compatibility with `special-display-buffer-names';
7435 the cdr of the cons cell is ignored.
7437 See also `same-window-regexps'. */);
7438 Vsame_window_buffer_names
= Qnil
;
7440 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
7441 doc
: /* *List of regexps saying which buffers should appear in the selected window.
7442 If a buffer name matches one of these regexps, then displaying it
7443 using `display-buffer' or `pop-to-buffer' switches to it
7444 in the selected window, rather than making it appear in some other window.
7446 An element of the list can be a cons cell instead of just a string.
7447 Then the car must be a string, which specifies the buffer name.
7448 This is for compatibility with `special-display-buffer-names';
7449 the cdr of the cons cell is ignored.
7451 See also `same-window-buffer-names'. */);
7452 Vsame_window_regexps
= Qnil
;
7454 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
7455 doc
: /* *Non-nil means display-buffer should make new windows. */);
7458 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
7459 doc
: /* *Number of lines of continuity when scrolling by screenfuls. */);
7460 next_screen_context_lines
= 2;
7462 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
7463 doc
: /* *A window must be at least this tall to be eligible for splitting
7464 by `display-buffer'. The value is in line units.
7465 If there is only one window, it is split regardless of this value. */);
7466 split_height_threshold
= 500;
7468 DEFVAR_INT ("window-min-height", &window_min_height
,
7469 doc
: /* *Delete any window less than this tall (including its mode line).
7470 The value is in line units. */);
7471 window_min_height
= 4;
7473 DEFVAR_INT ("window-min-width", &window_min_width
,
7474 doc
: /* *Delete any window less than this wide (measured in characters). */);
7475 window_min_width
= 10;
7477 DEFVAR_LISP ("scroll-preserve-screen-position",
7478 &Vscroll_preserve_screen_position
,
7479 doc
: /* *Controls if scroll commands move point to keep its screen line unchanged.
7480 A value of nil means point does not keep its screen position except
7481 at the scroll margin or window boundary respectively.
7482 A value of t means point keeps its screen position if the scroll
7483 command moved it vertically out of the window, e.g. when scrolling
7485 Any other value means point always keeps its screen position. */);
7486 Vscroll_preserve_screen_position
= Qnil
;
7488 DEFVAR_LISP ("window-configuration-change-hook",
7489 &Vwindow_configuration_change_hook
,
7490 doc
: /* Functions to call when window configuration changes.
7491 The selected frame is the one whose configuration has changed. */);
7492 Vwindow_configuration_change_hook
= Qnil
;
7494 defsubr (&Sselected_window
);
7495 defsubr (&Sminibuffer_window
);
7496 defsubr (&Swindow_minibuffer_p
);
7497 defsubr (&Swindowp
);
7498 defsubr (&Swindow_live_p
);
7499 defsubr (&Spos_visible_in_window_p
);
7500 defsubr (&Swindow_line_height
);
7501 defsubr (&Swindow_buffer
);
7502 defsubr (&Swindow_height
);
7503 defsubr (&Swindow_width
);
7504 defsubr (&Swindow_hscroll
);
7505 defsubr (&Sset_window_hscroll
);
7506 defsubr (&Swindow_redisplay_end_trigger
);
7507 defsubr (&Sset_window_redisplay_end_trigger
);
7508 defsubr (&Swindow_edges
);
7509 defsubr (&Swindow_pixel_edges
);
7510 defsubr (&Swindow_inside_edges
);
7511 defsubr (&Swindow_inside_pixel_edges
);
7512 defsubr (&Scoordinates_in_window_p
);
7513 defsubr (&Swindow_at
);
7514 defsubr (&Swindow_point
);
7515 defsubr (&Swindow_start
);
7516 defsubr (&Swindow_end
);
7517 defsubr (&Sset_window_point
);
7518 defsubr (&Sset_window_start
);
7519 defsubr (&Swindow_dedicated_p
);
7520 defsubr (&Sset_window_dedicated_p
);
7521 defsubr (&Swindow_display_table
);
7522 defsubr (&Sset_window_display_table
);
7523 defsubr (&Snext_window
);
7524 defsubr (&Sprevious_window
);
7525 defsubr (&Sother_window
);
7526 defsubr (&Sget_lru_window
);
7527 defsubr (&Sget_largest_window
);
7528 defsubr (&Sget_buffer_window
);
7529 defsubr (&Sdelete_other_windows
);
7530 defsubr (&Sdelete_windows_on
);
7531 defsubr (&Sreplace_buffer_in_windows
);
7532 defsubr (&Sdelete_window
);
7533 defsubr (&Sset_window_buffer
);
7534 defsubr (&Sselect_window
);
7535 defsubr (&Sspecial_display_p
);
7536 defsubr (&Ssame_window_p
);
7537 defsubr (&Sdisplay_buffer
);
7538 defsubr (&Sforce_window_update
);
7539 defsubr (&Ssplit_window
);
7540 defsubr (&Senlarge_window
);
7541 defsubr (&Sshrink_window
);
7542 defsubr (&Sadjust_window_trailing_edge
);
7543 defsubr (&Sscroll_up
);
7544 defsubr (&Sscroll_down
);
7545 defsubr (&Sscroll_left
);
7546 defsubr (&Sscroll_right
);
7547 defsubr (&Sother_window_for_scrolling
);
7548 defsubr (&Sscroll_other_window
);
7549 defsubr (&Sminibuffer_selected_window
);
7550 defsubr (&Srecenter
);
7551 defsubr (&Swindow_text_height
);
7552 defsubr (&Smove_to_window_line
);
7553 defsubr (&Swindow_configuration_p
);
7554 defsubr (&Swindow_configuration_frame
);
7555 defsubr (&Sset_window_configuration
);
7556 defsubr (&Scurrent_window_configuration
);
7557 defsubr (&Ssave_window_excursion
);
7558 defsubr (&Swindow_tree
);
7559 defsubr (&Sset_window_margins
);
7560 defsubr (&Swindow_margins
);
7561 defsubr (&Sset_window_fringes
);
7562 defsubr (&Swindow_fringes
);
7563 defsubr (&Sset_window_scroll_bars
);
7564 defsubr (&Swindow_scroll_bars
);
7565 defsubr (&Swindow_vscroll
);
7566 defsubr (&Sset_window_vscroll
);
7567 defsubr (&Scompare_window_configurations
);
7568 defsubr (&Swindow_list
);
7574 initial_define_key (control_x_map
, '1', "delete-other-windows");
7575 initial_define_key (control_x_map
, '2', "split-window");
7576 initial_define_key (control_x_map
, '0', "delete-window");
7577 initial_define_key (control_x_map
, 'o', "other-window");
7578 initial_define_key (control_x_map
, '^', "enlarge-window");
7579 initial_define_key (control_x_map
, '<', "scroll-left");
7580 initial_define_key (control_x_map
, '>', "scroll-right");
7582 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
7583 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
7584 initial_define_key (meta_map
, 'v', "scroll-down");
7586 initial_define_key (global_map
, Ctl('L'), "recenter");
7587 initial_define_key (meta_map
, 'r', "move-to-window-line");
7590 /* arch-tag: 90a9c576-0590-48f1-a5f1-6c96a0452d9f
7591 (do not change this comment) */