1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985-1987, 1993-1998, 2000-2011
4 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 3 of the License, or
11 (at your option) any later version.
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. If not, see <http://www.gnu.org/licenses/>. */
35 #include "dispextern.h"
36 #include "blockinput.h"
37 #include "intervals.h"
38 #include "termhooks.h" /* For FRAME_TERMINAL. */
42 #endif /* HAVE_X_WINDOWS */
53 Lisp_Object Qwindowp
, Qwindow_live_p
;
54 static Lisp_Object Qwindow_configuration_p
;
55 static Lisp_Object Qdisplay_buffer
;
56 static Lisp_Object Qscroll_up
, Qscroll_down
, Qscroll_command
;
57 static Lisp_Object Qwindow_size_fixed
;
59 static int displayed_window_lines (struct window
*);
60 static struct window
*decode_window (Lisp_Object
);
61 static int count_windows (struct window
*);
62 static int get_leaf_windows (struct window
*, struct window
**, int);
63 static void window_scroll (Lisp_Object
, int, int, int);
64 static void window_scroll_pixel_based (Lisp_Object
, int, int, int);
65 static void window_scroll_line_based (Lisp_Object
, int, int, int);
66 static int window_min_size_1 (struct window
*, int, int);
67 static int window_min_size_2 (struct window
*, int, int);
68 static int window_min_size (struct window
*, int, int, int, int *);
69 static void size_window (Lisp_Object
, int, int, int, int, int);
70 static int freeze_window_start (struct window
*, void *);
71 static int window_fixed_size_p (struct window
*, int, int);
72 static void enlarge_window (Lisp_Object
, int, int);
73 static Lisp_Object
window_list (void);
74 static int add_window_to_list (struct window
*, void *);
75 static int candidate_window_p (Lisp_Object
, Lisp_Object
, Lisp_Object
,
77 static Lisp_Object
next_window (Lisp_Object
, Lisp_Object
,
79 static void decode_next_window_args (Lisp_Object
*, Lisp_Object
*,
81 static void foreach_window (struct frame
*,
82 int (* fn
) (struct window
*, void *),
84 static int foreach_window_1 (struct window
*,
85 int (* fn
) (struct window
*, void *),
87 static Lisp_Object
window_list_1 (Lisp_Object
, Lisp_Object
, Lisp_Object
);
88 static Lisp_Object
select_window (Lisp_Object
, Lisp_Object
, int);
90 /* This is the window in which the terminal's cursor should
91 be left when nothing is being done with it. This must
92 always be a leaf window, and its buffer is selected by
93 the top level editing loop at the end of each command.
95 This value is always the same as
96 FRAME_SELECTED_WINDOW (selected_frame). */
98 Lisp_Object selected_window
;
100 /* A list of all windows for use by next_window and Fwindow_list.
101 Functions creating or deleting windows should invalidate this cache
102 by setting it to nil. */
104 Lisp_Object Vwindow_list
;
106 /* The mini-buffer window of the selected frame.
107 Note that you cannot test for mini-bufferness of an arbitrary window
108 by comparing against this; but you can test for mini-bufferness of
109 the selected window. */
111 Lisp_Object minibuf_window
;
113 /* Non-nil means it is the window whose mode line should be
114 shown as the selected window when the minibuffer is selected. */
116 Lisp_Object minibuf_selected_window
;
118 /* Hook run at end of temp_output_buffer_show. */
120 static Lisp_Object Qtemp_buffer_show_hook
;
122 /* Incremented for each window created. */
124 static int sequence_number
;
126 /* Nonzero after init_window_once has finished. */
128 static int window_initialized
;
130 /* Hook to run when window config changes. */
132 static Lisp_Object Qwindow_configuration_change_hook
;
133 /* Incremented by 1 whenever a window is deleted. */
135 static int window_deletion_count
;
137 /* Used by the function window_scroll_pixel_based */
139 static int window_scroll_pixel_based_preserve_x
;
140 static int window_scroll_pixel_based_preserve_y
;
142 /* Same for window_scroll_line_based. */
144 static int window_scroll_preserve_hpos
;
145 static int window_scroll_preserve_vpos
;
147 #if 0 /* This isn't used anywhere. */
148 /* Nonzero means we can split a frame even if it is "unsplittable". */
149 static int inhibit_frame_unsplittable
;
153 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
154 doc
: /* Return t if OBJECT is a window. */)
157 return WINDOWP (object
) ? Qt
: Qnil
;
160 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
161 doc
: /* Return t if OBJECT is a window which is currently visible. */)
164 return WINDOW_LIVE_P (object
) ? Qt
: Qnil
;
171 register struct window
*p
;
173 p
= allocate_window ();
175 XSETFASTINT (p
->sequence_number
, sequence_number
);
176 XSETFASTINT (p
->left_col
, 0);
177 XSETFASTINT (p
->top_line
, 0);
178 XSETFASTINT (p
->total_lines
, 0);
179 XSETFASTINT (p
->total_cols
, 0);
180 XSETFASTINT (p
->hscroll
, 0);
181 XSETFASTINT (p
->min_hscroll
, 0);
182 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
183 p
->start
= Fmake_marker ();
184 p
->pointm
= Fmake_marker ();
185 XSETFASTINT (p
->use_time
, 0);
187 p
->display_table
= Qnil
;
189 p
->window_parameters
= Qnil
;
190 p
->pseudo_window_p
= 0;
191 memset (&p
->cursor
, 0, sizeof (p
->cursor
));
192 memset (&p
->last_cursor
, 0, sizeof (p
->last_cursor
));
193 memset (&p
->phys_cursor
, 0, sizeof (p
->phys_cursor
));
194 p
->desired_matrix
= p
->current_matrix
= 0;
195 p
->nrows_scale_factor
= p
->ncols_scale_factor
= 1;
196 p
->phys_cursor_type
= -1;
197 p
->phys_cursor_width
= -1;
198 p
->must_be_updated_p
= 0;
199 XSETFASTINT (p
->window_end_vpos
, 0);
200 XSETFASTINT (p
->window_end_pos
, 0);
201 p
->window_end_valid
= Qnil
;
204 XSETFASTINT (p
->last_point
, 0);
205 p
->frozen_window_start_p
= 0;
206 p
->last_cursor_off_p
= p
->cursor_off_p
= 0;
207 p
->left_margin_cols
= Qnil
;
208 p
->right_margin_cols
= Qnil
;
209 p
->left_fringe_width
= Qnil
;
210 p
->right_fringe_width
= Qnil
;
211 p
->fringes_outside_margins
= Qnil
;
212 p
->scroll_bar_width
= Qnil
;
213 p
->vertical_scroll_bar_type
= Qt
;
214 p
->resize_proportionally
= Qnil
;
220 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
221 doc
: /* Return the window that the cursor now appears in and commands apply to. */)
224 return selected_window
;
227 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
228 doc
: /* Return the window used now for minibuffers.
229 If the optional argument FRAME is specified, return the minibuffer window
230 used by that frame. */)
234 frame
= selected_frame
;
235 CHECK_LIVE_FRAME (frame
);
236 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
239 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
,
240 Swindow_minibuffer_p
, 0, 1, 0,
241 doc
: /* Return non-nil if WINDOW is a minibuffer window.
242 WINDOW defaults to the selected window. */)
245 struct window
*w
= decode_window (window
);
246 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
250 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
251 Spos_visible_in_window_p
, 0, 3, 0,
252 doc
: /* Return non-nil if position POS is currently on the frame in WINDOW.
253 Return nil if that position is scrolled vertically out of view.
254 If a character is only partially visible, nil is returned, unless the
255 optional argument PARTIALLY is non-nil.
256 If POS is only out of view because of horizontal scrolling, return non-nil.
257 If POS is t, it specifies the position of the last visible glyph in WINDOW.
258 POS defaults to point in WINDOW; WINDOW defaults to the selected window.
260 If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil,
261 return value is a list of 2 or 6 elements (X Y [RTOP RBOT ROWH VPOS]),
262 where X and Y are the pixel coordinates relative to the top left corner
263 of the window. The remaining elements are omitted if the character after
264 POS is fully visible; otherwise, RTOP and RBOT are the number of pixels
265 off-window at the top and bottom of the row, ROWH is the height of the
266 display row, and VPOS is the row number (0-based) containing POS. */)
267 (Lisp_Object pos
, Lisp_Object window
, Lisp_Object partially
)
269 register struct window
*w
;
270 register EMACS_INT posint
;
271 register struct buffer
*buf
;
273 Lisp_Object in_window
= Qnil
;
274 int rtop
, rbot
, rowh
, vpos
, fully_p
= 1;
277 w
= decode_window (window
);
278 buf
= XBUFFER (w
->buffer
);
279 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
283 else if (!NILP (pos
))
285 CHECK_NUMBER_COERCE_MARKER (pos
);
288 else if (w
== XWINDOW (selected_window
))
291 posint
= XMARKER (w
->pointm
)->charpos
;
293 /* If position is above window start or outside buffer boundaries,
294 or if window start is out of range, position is not visible. */
296 || (posint
>= CHARPOS (top
) && posint
<= BUF_ZV (buf
)))
297 && CHARPOS (top
) >= BUF_BEGV (buf
)
298 && CHARPOS (top
) <= BUF_ZV (buf
)
299 && pos_visible_p (w
, posint
, &x
, &y
, &rtop
, &rbot
, &rowh
, &vpos
)
300 && (fully_p
= !rtop
&& !rbot
, (!NILP (partially
) || fully_p
)))
303 if (!NILP (in_window
) && !NILP (partially
))
305 Lisp_Object part
= Qnil
;
307 part
= list4 (make_number (rtop
), make_number (rbot
),
308 make_number (rowh
), make_number (vpos
));
309 in_window
= Fcons (make_number (x
),
310 Fcons (make_number (y
), part
));
316 DEFUN ("window-line-height", Fwindow_line_height
,
317 Swindow_line_height
, 0, 2, 0,
318 doc
: /* Return height in pixels of text line LINE in window WINDOW.
319 If WINDOW is nil or omitted, use selected window.
321 Return height of current line if LINE is omitted or nil. Return height of
322 header or mode line if LINE is `header-line' and `mode-line'.
323 Otherwise, LINE is a text line number starting from 0. A negative number
324 counts from the end of the window.
326 Value is a list (HEIGHT VPOS YPOS OFFBOT), where HEIGHT is the height
327 in pixels of the visible part of the line, VPOS and YPOS are the
328 vertical position in lines and pixels of the line, relative to the top
329 of the first text line, and OFFBOT is the number of off-window pixels at
330 the bottom of the text line. If there are off-window pixels at the top
331 of the (first) text line, YPOS is negative.
333 Return nil if window display is not up-to-date. In that case, use
334 `pos-visible-in-window-p' to obtain the information. */)
335 (Lisp_Object line
, Lisp_Object window
)
337 register struct window
*w
;
338 register struct buffer
*b
;
339 struct glyph_row
*row
, *end_row
;
340 int max_y
, crop
, i
, n
;
342 w
= decode_window (window
);
345 || w
->pseudo_window_p
)
348 CHECK_BUFFER (w
->buffer
);
349 b
= XBUFFER (w
->buffer
);
351 /* Fail if current matrix is not up-to-date. */
352 if (NILP (w
->window_end_valid
)
353 || current_buffer
->clip_changed
354 || current_buffer
->prevent_redisplay_optimizations_p
355 || XFASTINT (w
->last_modified
) < BUF_MODIFF (b
)
356 || XFASTINT (w
->last_overlay_modified
) < BUF_OVERLAY_MODIFF (b
))
362 if (i
< 0 || i
>= w
->current_matrix
->nrows
363 || (row
= MATRIX_ROW (w
->current_matrix
, i
), !row
->enabled_p
))
365 max_y
= window_text_bottom_y (w
);
369 if (EQ (line
, Qheader_line
))
371 if (!WINDOW_WANTS_HEADER_LINE_P (w
))
373 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
376 return list4 (make_number (row
->height
),
377 make_number (0), make_number (0),
381 if (EQ (line
, Qmode_line
))
383 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
386 return list4 (make_number (row
->height
),
387 make_number (0), /* not accurate */
388 make_number (WINDOW_HEADER_LINE_HEIGHT (w
)
389 + window_text_bottom_y (w
)),
396 row
= MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
397 end_row
= MATRIX_BOTTOM_TEXT_ROW (w
->current_matrix
, w
);
398 max_y
= window_text_bottom_y (w
);
401 while ((n
< 0 || i
< n
)
402 && row
<= end_row
&& row
->enabled_p
403 && row
->y
+ row
->height
< max_y
)
406 if (row
> end_row
|| !row
->enabled_p
)
418 crop
= max (0, (row
->y
+ row
->height
) - max_y
);
419 return list4 (make_number (row
->height
+ min (0, row
->y
) - crop
),
421 make_number (row
->y
),
427 static struct window
*
428 decode_window (register Lisp_Object window
)
431 return XWINDOW (selected_window
);
433 CHECK_LIVE_WINDOW (window
);
434 return XWINDOW (window
);
437 static struct window
*
438 decode_any_window (register Lisp_Object window
)
441 return XWINDOW (selected_window
);
443 CHECK_WINDOW (window
);
444 return XWINDOW (window
);
447 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
448 doc
: /* Return the buffer that WINDOW is displaying.
449 WINDOW defaults to the selected window. */)
452 return decode_window (window
)->buffer
;
455 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
456 doc
: /* Return the number of lines in WINDOW.
457 WINDOW defaults to the selected window.
459 The return value includes WINDOW's mode line and header line, if any.
461 Note: The function does not take into account the value of `line-spacing'
462 when calculating the number of lines in WINDOW. */)
465 return decode_any_window (window
)->total_lines
;
468 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
469 doc
: /* Return the number of display columns in WINDOW.
470 WINDOW defaults to the selected window.
472 Note: The return value is the number of columns available for text in
473 WINDOW. If you want to find out how many columns WINDOW takes up, use
474 (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))). */)
477 return make_number (window_box_text_cols (decode_any_window (window
)));
480 DEFUN ("window-full-width-p", Fwindow_full_width_p
, Swindow_full_width_p
, 0, 1, 0,
481 doc
: /* Return t if WINDOW is as wide as its frame.
482 WINDOW defaults to the selected window. */)
485 return WINDOW_FULL_WIDTH_P (decode_any_window (window
)) ? Qt
: Qnil
;
488 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
489 doc
: /* Return the number of columns by which WINDOW is scrolled from left margin.
490 WINDOW defaults to the selected window. */)
493 return decode_window (window
)->hscroll
;
496 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
497 doc
: /* Set number of columns WINDOW is scrolled from left margin to NCOL.
498 Return NCOL. NCOL should be zero or positive.
500 Note that if `automatic-hscrolling' is non-nil, you cannot scroll the
501 window so that the location of point moves off-window. */)
502 (Lisp_Object window
, Lisp_Object ncol
)
504 struct window
*w
= decode_window (window
);
508 hscroll
= max (0, XINT (ncol
));
510 /* Prevent redisplay shortcuts when changing the hscroll. */
511 if (XINT (w
->hscroll
) != hscroll
)
512 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
514 w
->hscroll
= make_number (hscroll
);
518 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
519 Swindow_redisplay_end_trigger
, 0, 1, 0,
520 doc
: /* Return WINDOW's redisplay end trigger value.
521 WINDOW defaults to the selected window.
522 See `set-window-redisplay-end-trigger' for more information. */)
525 return decode_window (window
)->redisplay_end_trigger
;
528 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
529 Sset_window_redisplay_end_trigger
, 2, 2, 0,
530 doc
: /* Set WINDOW's redisplay end trigger value to VALUE.
531 VALUE should be a buffer position (typically a marker) or nil.
532 If it is a buffer position, then if redisplay in WINDOW reaches a position
533 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called
534 with two arguments: WINDOW, and the end trigger value.
535 Afterwards the end-trigger value is reset to nil. */)
536 (register Lisp_Object window
, Lisp_Object value
)
538 register struct window
*w
;
540 w
= decode_window (window
);
541 w
->redisplay_end_trigger
= value
;
545 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
546 doc
: /* Return a list of the edge coordinates of WINDOW.
547 The list has the form (LEFT TOP RIGHT BOTTOM).
548 TOP and BOTTOM count by lines, and LEFT and RIGHT count by columns,
549 all relative to 0, 0 at top left corner of frame.
551 RIGHT is one more than the rightmost column occupied by WINDOW.
552 BOTTOM is one more than the bottommost row occupied by WINDOW.
553 The edges include the space used by WINDOW's scroll bar, display
554 margins, fringes, header line, and/or mode line. For the edges of
555 just the text area, use `window-inside-edges'. */)
558 register struct window
*w
= decode_any_window (window
);
560 return Fcons (make_number (WINDOW_LEFT_EDGE_COL (w
)),
561 Fcons (make_number (WINDOW_TOP_EDGE_LINE (w
)),
562 Fcons (make_number (WINDOW_RIGHT_EDGE_COL (w
)),
563 Fcons (make_number (WINDOW_BOTTOM_EDGE_LINE (w
)),
567 DEFUN ("window-pixel-edges", Fwindow_pixel_edges
, Swindow_pixel_edges
, 0, 1, 0,
568 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
569 The list has the form (LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at
570 the top left corner of the frame.
572 RIGHT is one more than the rightmost x position occupied by WINDOW.
573 BOTTOM is one more than the bottommost y position occupied by WINDOW.
574 The pixel edges include the space used by WINDOW's scroll bar, display
575 margins, fringes, header line, and/or mode line. For the pixel edges
576 of just the text area, use `window-inside-pixel-edges'. */)
579 register struct window
*w
= decode_any_window (window
);
581 return Fcons (make_number (WINDOW_LEFT_EDGE_X (w
)),
582 Fcons (make_number (WINDOW_TOP_EDGE_Y (w
)),
583 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w
)),
584 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w
)),
589 calc_absolute_offset(struct window
*w
, int *add_x
, int *add_y
)
591 struct frame
*f
= XFRAME (w
->frame
);
593 #ifdef FRAME_MENUBAR_HEIGHT
594 *add_y
+= FRAME_MENUBAR_HEIGHT (f
);
596 #ifdef FRAME_TOOLBAR_TOP_HEIGHT
597 *add_y
+= FRAME_TOOLBAR_TOP_HEIGHT (f
);
598 #elif FRAME_TOOLBAR_HEIGHT
599 *add_y
+= FRAME_TOOLBAR_HEIGHT (f
);
601 #ifdef FRAME_NS_TITLEBAR_HEIGHT
602 *add_y
+= FRAME_NS_TITLEBAR_HEIGHT (f
);
604 *add_x
= f
->left_pos
;
605 #ifdef FRAME_TOOLBAR_LEFT_WIDTH
606 *add_x
+= FRAME_TOOLBAR_LEFT_WIDTH (f
);
610 DEFUN ("window-absolute-pixel-edges", Fwindow_absolute_pixel_edges
,
611 Swindow_absolute_pixel_edges
, 0, 1, 0,
612 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
613 The list has the form (LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at
614 the top left corner of the display.
616 RIGHT is one more than the rightmost x position occupied by WINDOW.
617 BOTTOM is one more than the bottommost y position occupied by WINDOW.
618 The pixel edges include the space used by WINDOW's scroll bar, display
619 margins, fringes, header line, and/or mode line. For the pixel edges
620 of just the text area, use `window-inside-absolute-pixel-edges'. */)
623 register struct window
*w
= decode_any_window (window
);
625 calc_absolute_offset (w
, &add_x
, &add_y
);
627 return Fcons (make_number (WINDOW_LEFT_EDGE_X (w
) + add_x
),
628 Fcons (make_number (WINDOW_TOP_EDGE_Y (w
) + add_y
),
629 Fcons (make_number (WINDOW_RIGHT_EDGE_X (w
) + add_x
),
630 Fcons (make_number (WINDOW_BOTTOM_EDGE_Y (w
) + add_y
),
634 DEFUN ("window-inside-edges", Fwindow_inside_edges
, Swindow_inside_edges
, 0, 1, 0,
635 doc
: /* Return a list of the edge coordinates of WINDOW.
636 The list has the form (LEFT TOP RIGHT BOTTOM).
637 TOP and BOTTOM count by lines, and LEFT and RIGHT count by columns,
638 all relative to 0, 0 at top left corner of frame.
640 RIGHT is one more than the rightmost column of WINDOW's text area.
641 BOTTOM is one more than the bottommost row of WINDOW's text area.
642 The inside edges do not include the space used by the WINDOW's scroll
643 bar, display margins, fringes, header line, and/or mode line. */)
646 register struct window
*w
= decode_any_window (window
);
648 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_COL (w
)
649 + WINDOW_LEFT_MARGIN_COLS (w
)
650 + WINDOW_LEFT_FRINGE_COLS (w
)),
651 make_number (WINDOW_TOP_EDGE_LINE (w
)
652 + WINDOW_HEADER_LINE_LINES (w
)),
653 make_number (WINDOW_BOX_RIGHT_EDGE_COL (w
)
654 - WINDOW_RIGHT_MARGIN_COLS (w
)
655 - WINDOW_RIGHT_FRINGE_COLS (w
)),
656 make_number (WINDOW_BOTTOM_EDGE_LINE (w
)
657 - WINDOW_MODE_LINE_LINES (w
)));
660 DEFUN ("window-inside-pixel-edges", Fwindow_inside_pixel_edges
, Swindow_inside_pixel_edges
, 0, 1, 0,
661 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
662 The list has the form (LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at
663 the top left corner of the frame.
665 RIGHT is one more than the rightmost x position of WINDOW's text area.
666 BOTTOM is one more than the bottommost y position of WINDOW's text area.
667 The inside edges do not include the space used by WINDOW's scroll bar,
668 display margins, fringes, header line, and/or mode line. */)
671 register struct window
*w
= decode_any_window (window
);
673 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w
)
674 + WINDOW_LEFT_MARGIN_WIDTH (w
)
675 + WINDOW_LEFT_FRINGE_WIDTH (w
)),
676 make_number (WINDOW_TOP_EDGE_Y (w
)
677 + WINDOW_HEADER_LINE_HEIGHT (w
)),
678 make_number (WINDOW_BOX_RIGHT_EDGE_X (w
)
679 - WINDOW_RIGHT_MARGIN_WIDTH (w
)
680 - WINDOW_RIGHT_FRINGE_WIDTH (w
)),
681 make_number (WINDOW_BOTTOM_EDGE_Y (w
)
682 - WINDOW_MODE_LINE_HEIGHT (w
)));
685 DEFUN ("window-inside-absolute-pixel-edges",
686 Fwindow_inside_absolute_pixel_edges
,
687 Swindow_inside_absolute_pixel_edges
, 0, 1, 0,
688 doc
: /* Return a list of the edge pixel coordinates of WINDOW.
689 The list has the form (LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at
690 the top left corner of the display.
692 RIGHT is one more than the rightmost x position of WINDOW's text area.
693 BOTTOM is one more than the bottommost y position of WINDOW's text area.
694 The inside edges do not include the space used by WINDOW's scroll bar,
695 display margins, fringes, header line, and/or mode line. */)
698 register struct window
*w
= decode_any_window (window
);
700 calc_absolute_offset (w
, &add_x
, &add_y
);
702 return list4 (make_number (WINDOW_BOX_LEFT_EDGE_X (w
)
703 + WINDOW_LEFT_MARGIN_WIDTH (w
)
704 + WINDOW_LEFT_FRINGE_WIDTH (w
) + add_x
),
705 make_number (WINDOW_TOP_EDGE_Y (w
)
706 + WINDOW_HEADER_LINE_HEIGHT (w
) + add_y
),
707 make_number (WINDOW_BOX_RIGHT_EDGE_X (w
)
708 - WINDOW_RIGHT_MARGIN_WIDTH (w
)
709 - WINDOW_RIGHT_FRINGE_WIDTH (w
) + add_x
),
710 make_number (WINDOW_BOTTOM_EDGE_Y (w
)
711 - WINDOW_MODE_LINE_HEIGHT (w
) + add_y
));
714 /* Test if the character at column X, row Y is within window W.
715 If it is not, return ON_NOTHING;
716 if it is in the window's text area, return ON_TEXT;
717 if it is on the window's modeline, return ON_MODE_LINE;
718 if it is on the border between the window and its right sibling,
719 return ON_VERTICAL_BORDER.
720 if it is on a scroll bar, 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;
724 if it is in the marginal area to the left/right of the window,
725 return ON_LEFT_MARGIN or ON_RIGHT_MARGIN.
727 X and Y are frame relative pixel coordinates. */
729 static enum window_part
730 coordinates_in_window (register struct window
*w
, int x
, int y
)
732 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
734 enum window_part part
;
735 int ux
= FRAME_COLUMN_WIDTH (f
);
736 int x0
= WINDOW_LEFT_EDGE_X (w
);
737 int x1
= WINDOW_RIGHT_EDGE_X (w
);
738 /* The width of the area where the vertical line can be dragged.
739 (Between mode lines for instance. */
740 int grabbable_width
= ux
;
741 int lmargin_width
, rmargin_width
, text_left
, text_right
;
742 int top_y
= WINDOW_TOP_EDGE_Y (w
);
743 int bottom_y
= WINDOW_BOTTOM_EDGE_Y (w
);
745 /* Outside any interesting row? */
746 if (y
< top_y
|| y
>= bottom_y
)
749 /* In what's below, we subtract 1 when computing right_x because we
750 want the rightmost pixel, which is given by left_pixel+width-1. */
751 if (w
->pseudo_window_p
)
754 right_x
= WINDOW_TOTAL_WIDTH (w
) - 1;
758 left_x
= WINDOW_BOX_LEFT_EDGE_X (w
);
759 right_x
= WINDOW_BOX_RIGHT_EDGE_X (w
) - 1;
762 /* On the mode line or header line? If it's near the start of
763 the mode or header line of window that's has a horizontal
764 sibling, say it's on the vertical line. That's to be able
765 to resize windows horizontally in case we're using toolkit
768 if (WINDOW_WANTS_MODELINE_P (w
)
769 && y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
))
773 header_vertical_border_check
:
774 /* We're somewhere on the mode line. We consider the place
775 between mode lines of horizontally adjacent mode lines
776 as the vertical border. If scroll bars on the left,
777 return the right window. */
778 if ((WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w
)
779 || WINDOW_RIGHTMOST_P (w
))
780 && !WINDOW_LEFTMOST_P (w
)
781 && eabs (x
- x0
) < grabbable_width
)
782 return ON_VERTICAL_BORDER
;
784 /* Make sure we're not at the rightmost position of a
785 mode-/header-line and there's yet another window on the
787 else if ((WINDOW_RIGHTMOST_P (w
) || x
< x1
)
788 && eabs (x
- x1
) < grabbable_width
)
789 return ON_VERTICAL_BORDER
;
791 if (x
< x0
|| x
>= x1
)
797 if (WINDOW_WANTS_HEADER_LINE_P (w
)
798 && y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
))
800 part
= ON_HEADER_LINE
;
801 goto header_vertical_border_check
;
804 if (x
< x0
|| x
>= x1
) return ON_NOTHING
;
806 /* Outside any interesting column? */
807 if (x
< left_x
|| x
> right_x
)
808 return ON_SCROLL_BAR
;
810 lmargin_width
= window_box_width (w
, LEFT_MARGIN_AREA
);
811 rmargin_width
= window_box_width (w
, RIGHT_MARGIN_AREA
);
813 text_left
= window_box_left (w
, TEXT_AREA
);
814 text_right
= text_left
+ window_box_width (w
, TEXT_AREA
);
816 if (FRAME_WINDOW_P (f
))
818 if (!w
->pseudo_window_p
819 && !WINDOW_HAS_VERTICAL_SCROLL_BAR (w
)
820 && !WINDOW_RIGHTMOST_P (w
)
821 && (eabs (x
- right_x
) < grabbable_width
))
822 return ON_VERTICAL_BORDER
;
824 /* Need to say "x > right_x" rather than >=, since on character
825 terminals, the vertical line's x coordinate is right_x. */
826 else if (!w
->pseudo_window_p
827 && !WINDOW_RIGHTMOST_P (w
)
829 return ON_VERTICAL_BORDER
;
833 if (lmargin_width
> 0
834 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
835 ? (x
>= left_x
+ WINDOW_LEFT_FRINGE_WIDTH (w
))
836 : (x
< left_x
+ lmargin_width
)))
837 return ON_LEFT_MARGIN
;
839 return ON_LEFT_FRINGE
;
844 if (rmargin_width
> 0
845 && (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
846 ? (x
< right_x
- WINDOW_RIGHT_FRINGE_WIDTH (w
))
847 : (x
>= right_x
- rmargin_width
)))
848 return ON_RIGHT_MARGIN
;
850 return ON_RIGHT_FRINGE
;
853 /* Everything special ruled out - must be on text area */
857 /* Take X is the frame-relative pixel x-coordinate, and return the
858 x-coordinate relative to part PART of window W. */
860 window_relative_x_coord (struct window
*w
, enum window_part part
, int x
)
862 int left_x
= (w
->pseudo_window_p
) ? 0 : WINDOW_BOX_LEFT_EDGE_X (w
);
867 return x
- window_box_left (w
, TEXT_AREA
);
872 case ON_RIGHT_FRINGE
:
873 return x
- left_x
- WINDOW_LEFT_FRINGE_WIDTH (w
);
877 - ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
878 ? WINDOW_LEFT_FRINGE_WIDTH (w
) : 0));
880 case ON_RIGHT_MARGIN
:
882 - ((w
->pseudo_window_p
)
883 ? WINDOW_TOTAL_WIDTH (w
)
884 : WINDOW_BOX_RIGHT_EDGE_X (w
))
885 + window_box_width (w
, RIGHT_MARGIN_AREA
)
886 + ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
))
887 ? WINDOW_RIGHT_FRINGE_WIDTH (w
) : 0));
890 /* ON_SCROLL_BAR, ON_NOTHING, and ON_VERTICAL_BORDER: */
895 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
896 Scoordinates_in_window_p
, 2, 2, 0,
897 doc
: /* Return non-nil if COORDINATES are in WINDOW.
898 COORDINATES is a cons of the form (X . Y), X and Y being distances
899 measured in characters from the upper-left corner of the frame.
900 \(0 . 0) denotes the character in the upper left corner of the
902 If COORDINATES are in the text portion of WINDOW,
903 the coordinates relative to the window are returned.
904 If they are in the mode line of WINDOW, `mode-line' is returned.
905 If they are in the top mode line of WINDOW, `header-line' is returned.
906 If they are in the left fringe of WINDOW, `left-fringe' is returned.
907 If they are in the right fringe of WINDOW, `right-fringe' is returned.
908 If they are on the border between WINDOW and its right sibling,
909 `vertical-line' is returned.
910 If they are in the windows's left or right marginal areas, `left-margin'\n\
911 or `right-margin' is returned. */)
912 (register Lisp_Object coordinates
, Lisp_Object window
)
919 CHECK_WINDOW (window
);
920 w
= XWINDOW (window
);
921 f
= XFRAME (w
->frame
);
922 CHECK_CONS (coordinates
);
923 lx
= Fcar (coordinates
);
924 ly
= Fcdr (coordinates
);
925 CHECK_NUMBER_OR_FLOAT (lx
);
926 CHECK_NUMBER_OR_FLOAT (ly
);
927 x
= FRAME_PIXEL_X_FROM_CANON_X (f
, lx
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
928 y
= FRAME_PIXEL_Y_FROM_CANON_Y (f
, ly
) + FRAME_INTERNAL_BORDER_WIDTH (f
);
930 switch (coordinates_in_window (w
, x
, y
))
936 /* Convert X and Y to window relative pixel coordinates, and
937 return the canonical char units. */
938 x
-= window_box_left (w
, TEXT_AREA
);
939 y
-= WINDOW_TOP_EDGE_Y (w
);
940 return Fcons (FRAME_CANON_X_FROM_PIXEL_X (f
, x
),
941 FRAME_CANON_Y_FROM_PIXEL_Y (f
, y
));
946 case ON_VERTICAL_BORDER
:
947 return Qvertical_line
;
955 case ON_RIGHT_FRINGE
:
956 return Qright_fringe
;
961 case ON_RIGHT_MARGIN
:
962 return Qright_margin
;
965 /* Historically we are supposed to return nil in this case. */
974 /* Callback for foreach_window, used in window_from_coordinates.
975 Check if window W contains coordinates specified by USER_DATA which
976 is actually a pointer to a struct check_window_data CW.
978 Check if window W contains coordinates *CW->x and *CW->y. If it
979 does, return W in *CW->window, as Lisp_Object, and return in
980 *CW->part the part of the window under coordinates *X,*Y. Return
981 zero from this function to stop iterating over windows. */
983 struct check_window_data
987 enum window_part
*part
;
991 check_window_containing (struct window
*w
, void *user_data
)
993 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
994 enum window_part found
;
997 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
998 if (found
!= ON_NOTHING
)
1001 XSETWINDOW (*cw
->window
, w
);
1009 /* Find the window containing frame-relative pixel position X/Y and
1010 return it as a Lisp_Object.
1012 If X, Y is on one of the window's special `window_part' elements,
1013 set *PART to the id of that element.
1015 If there is no window under X, Y return nil and leave *PART
1016 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
1018 This function was previously implemented with a loop cycling over
1019 windows with Fnext_window, and starting with the frame's selected
1020 window. It turned out that this doesn't work with an
1021 implementation of next_window using Vwindow_list, because
1022 FRAME_SELECTED_WINDOW (F) is not always contained in the window
1023 tree of F when this function is called asynchronously from
1024 note_mouse_highlight. The original loop didn't terminate in this
1028 window_from_coordinates (struct frame
*f
, int x
, int y
,
1029 enum window_part
*part
, int tool_bar_p
)
1032 struct check_window_data cw
;
1033 enum window_part dummy
;
1039 cw
.window
= &window
, cw
.x
= x
, cw
.y
= y
; cw
.part
= part
;
1040 foreach_window (f
, check_window_containing
, &cw
);
1042 /* If not found above, see if it's in the tool bar window, if a tool
1046 && WINDOWP (f
->tool_bar_window
)
1047 && WINDOW_TOTAL_LINES (XWINDOW (f
->tool_bar_window
)) > 0
1048 && (coordinates_in_window (XWINDOW (f
->tool_bar_window
), x
, y
)
1052 window
= f
->tool_bar_window
;
1058 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
1059 doc
: /* Return window containing coordinates X and Y on FRAME.
1060 If omitted, FRAME defaults to the currently selected frame.
1061 The top left corner of the frame is considered to be row 0,
1063 (Lisp_Object x
, Lisp_Object y
, Lisp_Object frame
)
1068 frame
= selected_frame
;
1069 CHECK_LIVE_FRAME (frame
);
1072 /* Check that arguments are integers or floats. */
1073 CHECK_NUMBER_OR_FLOAT (x
);
1074 CHECK_NUMBER_OR_FLOAT (y
);
1076 return window_from_coordinates (f
,
1077 (FRAME_PIXEL_X_FROM_CANON_X (f
, x
)
1078 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
1079 (FRAME_PIXEL_Y_FROM_CANON_Y (f
, y
)
1080 + FRAME_INTERNAL_BORDER_WIDTH (f
)),
1084 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
1085 doc
: /* Return current value of point in WINDOW.
1086 WINDOW defaults to the selected window.
1088 For a nonselected window, this is the value point would have
1089 if that window were selected.
1091 Note that, when WINDOW is the selected window and its buffer
1092 is also currently selected, the value returned is the same as (point).
1093 It would be more strictly correct to return the `top-level' value
1094 of point, outside of any save-excursion forms.
1095 But that is hard to define. */)
1096 (Lisp_Object window
)
1098 register struct window
*w
= decode_window (window
);
1100 if (w
== XWINDOW (selected_window
)
1101 && current_buffer
== XBUFFER (w
->buffer
))
1103 return Fmarker_position (w
->pointm
);
1106 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
1107 doc
: /* Return position at which display currently starts in WINDOW.
1108 WINDOW defaults to the selected window.
1109 This is updated by redisplay or by calling `set-window-start'. */)
1110 (Lisp_Object window
)
1112 return Fmarker_position (decode_window (window
)->start
);
1115 /* This is text temporarily removed from the doc string below.
1117 This function returns nil if the position is not currently known.
1118 That happens when redisplay is preempted and doesn't finish.
1119 If in that case you want to compute where the end of the window would
1120 have been if redisplay had finished, do this:
1122 (goto-char (window-start window))
1123 (vertical-motion (1- (window-height window)) window)
1126 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
1127 doc
: /* Return position at which display currently ends in WINDOW.
1128 WINDOW defaults to the selected window.
1129 This is updated by redisplay, when it runs to completion.
1130 Simply changing the buffer text or setting `window-start'
1131 does not update this value.
1132 Return nil if there is no recorded value. \(This can happen if the
1133 last redisplay of WINDOW was preempted, and did not finish.)
1134 If UPDATE is non-nil, compute the up-to-date position
1135 if it isn't already recorded. */)
1136 (Lisp_Object window
, Lisp_Object update
)
1139 struct window
*w
= decode_window (window
);
1147 #if 0 /* This change broke some things. We should make it later. */
1148 /* If we don't know the end position, return nil.
1149 The user can compute it with vertical-motion if he wants to.
1150 It would be nicer to do it automatically,
1151 but that's so slow that it would probably bother people. */
1152 if (NILP (w
->window_end_valid
))
1157 && ! (! NILP (w
->window_end_valid
)
1158 && XFASTINT (w
->last_modified
) >= BUF_MODIFF (b
)
1159 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (b
))
1162 struct text_pos startp
;
1164 struct buffer
*old_buffer
= NULL
;
1165 void *itdata
= NULL
;
1167 /* Cannot use Fvertical_motion because that function doesn't
1168 cope with variable-height lines. */
1169 if (b
!= current_buffer
)
1171 old_buffer
= current_buffer
;
1172 set_buffer_internal (b
);
1175 /* In case W->start is out of the range, use something
1176 reasonable. This situation occurred when loading a file with
1177 `-l' containing a call to `rmail' with subsequent other
1178 commands. At the end, W->start happened to be BEG, while
1179 rmail had already narrowed the buffer. */
1180 if (XMARKER (w
->start
)->charpos
< BEGV
)
1181 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
1182 else if (XMARKER (w
->start
)->charpos
> ZV
)
1183 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
1185 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
1187 itdata
= bidi_shelve_cache ();
1188 start_display (&it
, w
, startp
);
1189 move_it_vertically (&it
, window_box_height (w
));
1190 if (it
.current_y
< it
.last_visible_y
)
1191 move_it_past_eol (&it
);
1192 value
= make_number (IT_CHARPOS (it
));
1193 bidi_unshelve_cache (itdata
, 0);
1196 set_buffer_internal (old_buffer
);
1199 XSETINT (value
, BUF_Z (b
) - XFASTINT (w
->window_end_pos
));
1204 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
1205 doc
: /* Make point value in WINDOW be at position POS in WINDOW's buffer.
1207 (Lisp_Object window
, Lisp_Object pos
)
1209 register struct window
*w
= decode_window (window
);
1211 CHECK_NUMBER_COERCE_MARKER (pos
);
1212 if (w
== XWINDOW (selected_window
)
1213 && XBUFFER (w
->buffer
) == current_buffer
)
1216 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
1218 /* We have to make sure that redisplay updates the window to show
1219 the new value of point. */
1220 if (!EQ (window
, selected_window
))
1221 ++windows_or_buffers_changed
;
1226 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
1227 doc
: /* Make display in WINDOW start at position POS in WINDOW's buffer.
1228 WINDOW defaults to the selected window. Return POS.
1229 Optional third arg NOFORCE non-nil inhibits next redisplay from
1230 overriding motion of point in order to display at this exact start. */)
1231 (Lisp_Object window
, Lisp_Object pos
, Lisp_Object noforce
)
1233 register struct window
*w
= decode_window (window
);
1235 CHECK_NUMBER_COERCE_MARKER (pos
);
1236 set_marker_restricted (w
->start
, pos
, w
->buffer
);
1237 /* this is not right, but much easier than doing what is right. */
1238 w
->start_at_line_beg
= Qnil
;
1240 w
->force_start
= Qt
;
1241 w
->update_mode_line
= Qt
;
1242 XSETFASTINT (w
->last_modified
, 0);
1243 XSETFASTINT (w
->last_overlay_modified
, 0);
1244 if (!EQ (window
, selected_window
))
1245 windows_or_buffers_changed
++;
1251 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
1253 doc
: /* Return non-nil when WINDOW is dedicated to its buffer.
1254 More precisely, return the value assigned by the last call of
1255 `set-window-dedicated-p' for WINDOW. Return nil if that function was
1256 never called with WINDOW as its argument, or the value set by that
1257 function was internally reset since its last call. WINDOW defaults to
1258 the selected window.
1260 When a window is dedicated to its buffer, `display-buffer' will refrain
1261 from displaying another buffer in it. `get-lru-window' and
1262 `get-largest-window' treat dedicated windows specially.
1263 `delete-windows-on', `replace-buffer-in-windows', `quit-window' and
1264 `kill-buffer' can delete a dedicated window and the containing frame.
1266 Functions like `set-window-buffer' may change the buffer displayed by a
1267 window, unless that window is "strongly" dedicated to its buffer, that
1268 is the value returned by `window-dedicated-p' is t. */)
1269 (Lisp_Object window
)
1271 return decode_window (window
)->dedicated
;
1274 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
1275 Sset_window_dedicated_p
, 2, 2, 0,
1276 doc
: /* Mark WINDOW as dedicated according to FLAG.
1277 WINDOW defaults to the selected window. FLAG non-nil means mark WINDOW
1278 as dedicated to its buffer. FLAG nil means mark WINDOW as non-dedicated.
1281 When a window is dedicated to its buffer, `display-buffer' will refrain
1282 from displaying another buffer in it. `get-lru-window' and
1283 `get-largest-window' treat dedicated windows specially.
1284 `delete-windows-on', `replace-buffer-in-windows', `quit-window' and
1285 `kill-buffer' can delete a dedicated window and the containing
1288 As a special case, if FLAG is t, mark WINDOW as "strongly" dedicated to
1289 its buffer. Functions like `set-window-buffer' may change the buffer
1290 displayed by a window, unless that window is strongly dedicated to its
1291 buffer. If and when `set-window-buffer' displays another buffer in a
1292 window, it also makes sure that the window is not marked as dedicated. */)
1293 (Lisp_Object window
, Lisp_Object flag
)
1295 register struct window
*w
= decode_window (window
);
1297 w
->dedicated
= flag
;
1298 return w
->dedicated
;
1302 DEFUN ("window-parameters", Fwindow_parameters
, Swindow_parameters
,
1304 doc
: /* Return the parameters of WINDOW and their values.
1305 WINDOW defaults to the selected window. The return value is a list of
1306 elements of the form (PARAMETER . VALUE). */)
1307 (Lisp_Object window
)
1309 return Fcopy_alist (decode_window (window
)->window_parameters
);
1312 DEFUN ("window-parameter", Fwindow_parameter
, Swindow_parameter
,
1314 doc
: /* Return WINDOW's value for PARAMETER.
1315 WINDOW defaults to the selected window. */)
1316 (Lisp_Object window
, Lisp_Object parameter
)
1320 result
= Fassq (parameter
, decode_window (window
)->window_parameters
);
1321 return CDR_SAFE (result
);
1324 DEFUN ("set-window-parameter", Fset_window_parameter
,
1325 Sset_window_parameter
, 3, 3, 0,
1326 doc
: /* Set WINDOW's value of PARAMETER to VALUE.
1327 WINDOW defaults to the selected window. Return VALUE. */)
1328 (Lisp_Object window
, Lisp_Object parameter
, Lisp_Object value
)
1330 register struct window
*w
= decode_window (window
);
1331 Lisp_Object old_alist_elt
;
1333 old_alist_elt
= Fassq (parameter
, w
->window_parameters
);
1334 if (NILP (old_alist_elt
))
1335 w
->window_parameters
= Fcons (Fcons (parameter
, value
), w
->window_parameters
);
1337 Fsetcdr (old_alist_elt
, value
);
1342 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1344 doc
: /* Return the display-table that WINDOW is using.
1345 WINDOW defaults to the selected window. */)
1346 (Lisp_Object window
)
1348 return decode_window (window
)->display_table
;
1351 /* Get the display table for use on window W. This is either W's
1352 display table or W's buffer's display table. Ignore the specified
1353 tables if they are not valid; if no valid table is specified,
1356 struct Lisp_Char_Table
*
1357 window_display_table (struct window
*w
)
1359 struct Lisp_Char_Table
*dp
= NULL
;
1361 if (DISP_TABLE_P (w
->display_table
))
1362 dp
= XCHAR_TABLE (w
->display_table
);
1363 else if (BUFFERP (w
->buffer
))
1365 struct buffer
*b
= XBUFFER (w
->buffer
);
1367 if (DISP_TABLE_P (BVAR (b
, display_table
)))
1368 dp
= XCHAR_TABLE (BVAR (b
, display_table
));
1369 else if (DISP_TABLE_P (Vstandard_display_table
))
1370 dp
= XCHAR_TABLE (Vstandard_display_table
);
1376 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1377 doc
: /* Set WINDOW's display-table to TABLE. */)
1378 (register Lisp_Object window
, Lisp_Object table
)
1380 register struct window
*w
;
1382 w
= decode_window (window
);
1383 w
->display_table
= table
;
1387 static void delete_window (Lisp_Object
);
1389 /* Record info on buffer window w is displaying
1390 when it is about to cease to display that buffer. */
1392 unshow_buffer (register struct window
*w
)
1399 if (b
!= XMARKER (w
->pointm
)->buffer
)
1403 if (w
== XWINDOW (selected_window
)
1404 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1405 /* Do this except when the selected window's buffer
1406 is being removed from some other window. */
1408 /* last_window_start records the start position that this buffer
1409 had in the last window to be disconnected from it.
1410 Now that this statement is unconditional,
1411 it is possible for the buffer to be displayed in the
1412 selected window, while last_window_start reflects another
1413 window which was recently showing the same buffer.
1414 Some people might say that might be a good thing. Let's see. */
1415 b
->last_window_start
= marker_position (w
->start
);
1417 /* Point in the selected window's buffer
1418 is actually stored in that buffer, and the window's pointm isn't used.
1419 So don't clobber point in that buffer. */
1420 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1421 /* This line helps to fix Horsley's testbug.el bug. */
1422 && !(WINDOWP (BVAR (b
, last_selected_window
))
1423 && w
!= XWINDOW (BVAR (b
, last_selected_window
))
1424 && EQ (buf
, XWINDOW (BVAR (b
, last_selected_window
))->buffer
)))
1425 temp_set_point_both (b
,
1426 clip_to_bounds (BUF_BEGV (b
),
1427 XMARKER (w
->pointm
)->charpos
,
1429 clip_to_bounds (BUF_BEGV_BYTE (b
),
1430 marker_byte_position (w
->pointm
),
1433 if (WINDOWP (BVAR (b
, last_selected_window
))
1434 && w
== XWINDOW (BVAR (b
, last_selected_window
)))
1435 BVAR (b
, last_selected_window
) = Qnil
;
1438 /* Put replacement into the window structure in place of old. */
1440 replace_window (Lisp_Object old
, Lisp_Object replacement
)
1442 register Lisp_Object tem
;
1443 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1445 /* If OLD is its frame's root_window, then replacement is the new
1446 root_window for that frame. */
1448 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1449 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1451 p
->left_col
= o
->left_col
;
1452 p
->top_line
= o
->top_line
;
1453 p
->total_cols
= o
->total_cols
;
1454 p
->total_lines
= o
->total_lines
;
1455 p
->desired_matrix
= p
->current_matrix
= 0;
1457 memset (&p
->cursor
, 0, sizeof (p
->cursor
));
1458 memset (&p
->last_cursor
, 0, sizeof (p
->last_cursor
));
1459 memset (&p
->phys_cursor
, 0, sizeof (p
->phys_cursor
));
1460 p
->phys_cursor_type
= -1;
1461 p
->phys_cursor_width
= -1;
1462 p
->must_be_updated_p
= 0;
1463 p
->pseudo_window_p
= 0;
1464 XSETFASTINT (p
->window_end_vpos
, 0);
1465 XSETFASTINT (p
->window_end_pos
, 0);
1466 p
->window_end_valid
= Qnil
;
1467 p
->frozen_window_start_p
= 0;
1468 p
->orig_top_line
= p
->orig_total_lines
= Qnil
;
1470 p
->next
= tem
= o
->next
;
1472 XWINDOW (tem
)->prev
= replacement
;
1474 p
->prev
= tem
= o
->prev
;
1476 XWINDOW (tem
)->next
= replacement
;
1478 p
->parent
= tem
= o
->parent
;
1481 if (EQ (XWINDOW (tem
)->vchild
, old
))
1482 XWINDOW (tem
)->vchild
= replacement
;
1483 if (EQ (XWINDOW (tem
)->hchild
, old
))
1484 XWINDOW (tem
)->hchild
= replacement
;
1487 /*** Here, if replacement is a vertical combination
1488 and so is its new parent, we should make replacement's
1489 children be children of that parent instead. ***/
1492 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1493 doc
: /* Remove WINDOW from its frame.
1494 WINDOW defaults to the selected window. Return nil.
1495 Signal an error when WINDOW is the only window on its frame. */)
1496 (register Lisp_Object window
)
1500 window
= selected_window
;
1502 CHECK_LIVE_WINDOW (window
);
1504 f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1505 delete_window (window
);
1507 run_window_configuration_change_hook (f
);
1513 delete_window (register Lisp_Object window
)
1515 register Lisp_Object tem
, parent
, sib
;
1516 register struct window
*p
;
1517 register struct window
*par
;
1520 /* Because this function is called by other C code on non-leaf
1521 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1522 so we can't decode_window here. */
1523 CHECK_WINDOW (window
);
1524 p
= XWINDOW (window
);
1526 /* It's a no-op to delete an already-deleted window. */
1527 if (NILP (p
->buffer
)
1529 && NILP (p
->vchild
))
1534 error ("Attempt to delete minibuffer or sole ordinary window");
1535 par
= XWINDOW (parent
);
1537 windows_or_buffers_changed
++;
1538 Vwindow_list
= Qnil
;
1539 f
= XFRAME (WINDOW_FRAME (p
));
1540 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1542 /* Are we trying to delete any frame's selected window? */
1544 Lisp_Object swindow
, pwindow
;
1546 /* See if the frame's selected window is either WINDOW
1547 or any subwindow of it, by finding all that window's parents
1548 and comparing each one with WINDOW. */
1549 swindow
= FRAME_SELECTED_WINDOW (f
);
1554 while (!NILP (pwindow
))
1556 if (EQ (window
, pwindow
))
1558 pwindow
= XWINDOW (pwindow
)->parent
;
1561 /* If the window being deleted is not a parent of SWINDOW,
1562 then SWINDOW is ok as the new selected window. */
1563 if (!EQ (window
, pwindow
))
1565 /* Otherwise, try another window for SWINDOW. */
1566 swindow
= Fnext_window (swindow
, Qlambda
, Qnil
);
1568 /* If we get back to the frame's selected window,
1569 it means there was no acceptable alternative,
1570 so we cannot delete. */
1571 if (EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1572 error ("Cannot delete window");
1575 /* If we need to change SWINDOW, do it. */
1576 if (! EQ (swindow
, FRAME_SELECTED_WINDOW (f
)))
1578 /* If we're about to delete the selected window on the
1579 selected frame, then we should use Fselect_window to select
1580 the new window. On the other hand, if we're about to
1581 delete the selected window on any other frame, we shouldn't do
1582 anything but set the frame's selected_window slot. */
1583 if (EQ (FRAME_SELECTED_WINDOW (f
), selected_window
))
1584 Fselect_window (swindow
, Qnil
);
1586 FRAME_SELECTED_WINDOW (f
) = swindow
;
1590 /* Now we know we can delete this one. */
1591 window_deletion_count
++;
1594 /* tem is null for dummy parent windows
1595 (which have inferiors but not any contents themselves) */
1599 unchain_marker (XMARKER (p
->pointm
));
1600 unchain_marker (XMARKER (p
->start
));
1603 /* Free window glyph matrices. It is sure that they are allocated
1604 again when ADJUST_GLYPHS is called. Block input so that expose
1605 events and other events that access glyph matrices are not
1606 processed while we are changing them. */
1608 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1612 XWINDOW (tem
)->prev
= p
->prev
;
1616 XWINDOW (tem
)->next
= p
->next
;
1618 if (EQ (window
, par
->hchild
))
1619 par
->hchild
= p
->next
;
1620 if (EQ (window
, par
->vchild
))
1621 par
->vchild
= p
->next
;
1623 /* Find one of our siblings to give our space to. */
1627 /* If p gives its space to its next sibling, that sibling needs
1628 to have its top/left side pulled back to where p's is.
1629 set_window_{height,width} will re-position the sibling's
1632 XWINDOW (sib
)->top_line
= p
->top_line
;
1633 XWINDOW (sib
)->left_col
= p
->left_col
;
1636 /* Stretch that sibling. */
1637 if (!NILP (par
->vchild
))
1638 set_window_height (sib
,
1639 XFASTINT (XWINDOW (sib
)->total_lines
) + XFASTINT (p
->total_lines
),
1641 if (!NILP (par
->hchild
))
1642 set_window_width (sib
,
1643 XFASTINT (XWINDOW (sib
)->total_cols
) + XFASTINT (p
->total_cols
),
1646 /* If parent now has only one child,
1647 put the child into the parent's place. */
1651 if (NILP (XWINDOW (tem
)->next
)) {
1652 replace_window (parent
, tem
);
1653 par
= XWINDOW (tem
);
1656 /* Since we may be deleting combination windows, we must make sure that
1657 not only p but all its children have been marked as deleted. */
1658 if (! NILP (p
->hchild
))
1659 delete_all_subwindows (XWINDOW (p
->hchild
));
1660 else if (! NILP (p
->vchild
))
1661 delete_all_subwindows (XWINDOW (p
->vchild
));
1663 /* Mark this window as deleted. */
1664 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1666 if (! NILP (par
->parent
))
1667 par
= XWINDOW (par
->parent
);
1669 /* Check if we have a v/hchild with a v/hchild. In that case remove
1672 if (! NILP (par
->vchild
) && ! NILP (XWINDOW (par
->vchild
)->vchild
))
1674 p
= XWINDOW (par
->vchild
);
1675 par
->vchild
= p
->vchild
;
1678 else if (! NILP (par
->hchild
) && ! NILP (XWINDOW (par
->hchild
)->hchild
))
1680 p
= XWINDOW (par
->hchild
);
1681 par
->hchild
= p
->hchild
;
1689 while (! NILP (tem
)) {
1690 XWINDOW (tem
)->parent
= p
->parent
;
1691 if (NILP (XWINDOW (tem
)->next
))
1693 tem
= XWINDOW (tem
)->next
;
1696 /* The next of the v/hchild we are removing is now the next of the
1697 last child for the v/hchild:
1698 Before v/hchild -> v/hchild -> next1 -> next2
1701 After: v/hchild -> next1 -> next2 -> next3
1703 XWINDOW (tem
)->next
= p
->next
;
1704 if (! NILP (p
->next
))
1705 XWINDOW (p
->next
)->prev
= tem
;
1707 p
->next
= p
->prev
= p
->vchild
= p
->hchild
= p
->buffer
= Qnil
;
1711 /* Adjust glyph matrices. */
1718 /***********************************************************************
1720 ***********************************************************************/
1722 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1723 pointer. This is a callback function for foreach_window, used in
1724 function window_list. */
1727 add_window_to_list (struct window
*w
, void *user_data
)
1729 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1731 XSETWINDOW (window
, w
);
1732 *list
= Fcons (window
, *list
);
1737 /* Return a list of all windows, for use by next_window. If
1738 Vwindow_list is a list, return that list. Otherwise, build a new
1739 list, cache it in Vwindow_list, and return that. */
1744 if (!CONSP (Vwindow_list
))
1748 Vwindow_list
= Qnil
;
1749 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1751 Lisp_Object args
[2];
1753 /* We are visiting windows in canonical order, and add
1754 new windows at the front of args[1], which means we
1755 have to reverse this list at the end. */
1757 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1758 args
[0] = Vwindow_list
;
1759 args
[1] = Fnreverse (args
[1]);
1760 Vwindow_list
= Fnconc (2, args
);
1764 return Vwindow_list
;
1768 /* Value is non-zero if WINDOW satisfies the constraints given by
1769 OWINDOW, MINIBUF and ALL_FRAMES.
1771 MINIBUF t means WINDOW may be minibuffer windows.
1772 `lambda' means WINDOW may not be a minibuffer window.
1773 a window means a specific minibuffer window
1775 ALL_FRAMES t means search all frames,
1776 nil means search just current frame,
1777 `visible' means search just visible frames on the
1779 0 means search visible and iconified frames on the
1781 a window means search the frame that window belongs to,
1782 a frame means consider windows on that frame, only. */
1785 candidate_window_p (Lisp_Object window
, Lisp_Object owindow
, Lisp_Object minibuf
, Lisp_Object all_frames
)
1787 struct window
*w
= XWINDOW (window
);
1788 struct frame
*f
= XFRAME (w
->frame
);
1789 int candidate_p
= 1;
1791 if (!BUFFERP (w
->buffer
))
1793 else if (MINI_WINDOW_P (w
)
1794 && (EQ (minibuf
, Qlambda
)
1795 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1797 /* If MINIBUF is `lambda' don't consider any mini-windows.
1798 If it is a window, consider only that one. */
1801 else if (EQ (all_frames
, Qt
))
1803 else if (NILP (all_frames
))
1805 xassert (WINDOWP (owindow
));
1806 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1808 else if (EQ (all_frames
, Qvisible
))
1810 FRAME_SAMPLE_VISIBILITY (f
);
1811 candidate_p
= FRAME_VISIBLE_P (f
)
1812 && (FRAME_TERMINAL (XFRAME (w
->frame
))
1813 == FRAME_TERMINAL (XFRAME (selected_frame
)));
1816 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1818 FRAME_SAMPLE_VISIBILITY (f
);
1819 candidate_p
= (FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
)
1820 #ifdef HAVE_X_WINDOWS
1821 /* Yuck!! If we've just created the frame and the
1822 window-manager requested the user to place it
1823 manually, the window may still not be considered
1824 `visible'. I'd argue it should be at least
1825 something like `iconified', but don't know how to do
1827 || (FRAME_X_P (f
) && f
->output_data
.x
->asked_for_visible
1828 && !f
->output_data
.x
->has_been_visible
)
1831 && (FRAME_TERMINAL (XFRAME (w
->frame
))
1832 == FRAME_TERMINAL (XFRAME (selected_frame
)));
1834 else if (WINDOWP (all_frames
))
1835 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1836 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1837 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1838 else if (FRAMEP (all_frames
))
1839 candidate_p
= EQ (all_frames
, w
->frame
);
1845 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1846 Fwindow_list. See candidate_window_p for the meaning of WINDOW,
1847 MINIBUF, and ALL_FRAMES. */
1850 decode_next_window_args (Lisp_Object
*window
, Lisp_Object
*minibuf
, Lisp_Object
*all_frames
)
1853 *window
= selected_window
;
1855 CHECK_LIVE_WINDOW (*window
);
1857 /* MINIBUF nil may or may not include minibuffers. Decide if it
1859 if (NILP (*minibuf
))
1860 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1861 else if (!EQ (*minibuf
, Qt
))
1864 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1865 => count none of them, or a specific minibuffer window (the
1866 active one) to count. */
1868 /* ALL_FRAMES nil doesn't specify which frames to include. */
1869 if (NILP (*all_frames
))
1870 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1871 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1873 else if (EQ (*all_frames
, Qvisible
))
1875 else if (EQ (*all_frames
, make_number (0)))
1877 else if (FRAMEP (*all_frames
))
1879 else if (!EQ (*all_frames
, Qt
))
1884 /* Return the next or previous window of WINDOW in cyclic ordering
1885 of windows. NEXT_P non-zero means return the next window. See the
1886 documentation string of next-window for the meaning of MINIBUF and
1890 next_window (Lisp_Object window
, Lisp_Object minibuf
, Lisp_Object all_frames
, int next_p
)
1892 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1894 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1895 return the first window on the frame. */
1896 if (FRAMEP (all_frames
)
1897 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1898 return Fframe_first_window (all_frames
);
1904 /* Find WINDOW in the list of all windows. */
1905 list
= Fmemq (window
, window_list ());
1907 /* Scan forward from WINDOW to the end of the window list. */
1909 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1910 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1913 /* Scan from the start of the window list up to WINDOW. */
1915 for (list
= Vwindow_list
;
1916 CONSP (list
) && !EQ (XCAR (list
), window
);
1918 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1922 window
= XCAR (list
);
1926 Lisp_Object candidate
, list
;
1928 /* Scan through the list of windows for candidates. If there are
1929 candidate windows in front of WINDOW, the last one of these
1930 is the one we want. If there are candidates following WINDOW
1931 in the list, again the last one of these is the one we want. */
1933 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1935 if (EQ (XCAR (list
), window
))
1937 if (WINDOWP (candidate
))
1940 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1942 candidate
= XCAR (list
);
1945 if (WINDOWP (candidate
))
1953 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1954 doc
: /* Return window following WINDOW in cyclic ordering of windows.
1955 WINDOW defaults to the selected window. The optional arguments
1956 MINIBUF and ALL-FRAMES specify the set of windows to consider.
1958 MINIBUF t means consider the minibuffer window even if the
1959 minibuffer is not active. MINIBUF nil or omitted means consider
1960 the minibuffer window only if the minibuffer is active. Any
1961 other value means do not consider the minibuffer window even if
1962 the minibuffer is active.
1964 Several frames may share a single minibuffer; if the minibuffer
1965 is active, all windows on all frames that share that minibuffer
1966 are considered too. Therefore, if you are using a separate
1967 minibuffer frame and the minibuffer is active and MINIBUF says it
1968 counts, `next-window' considers the windows in the frame from
1969 which you entered the minibuffer, as well as the minibuffer
1972 ALL-FRAMES nil or omitted means consider all windows on WINDOW's
1973 frame, plus the minibuffer window if specified by the MINIBUF
1974 argument, see above. If the minibuffer counts, consider all
1975 windows on all frames that share that minibuffer too.
1976 ALL-FRAMES t means consider all windows on all existing frames.
1977 ALL-FRAMES `visible' means consider all windows on all visible
1978 frames on the current terminal.
1979 ALL-FRAMES 0 means consider all windows on all visible and
1980 iconified frames on the current terminal.
1981 ALL-FRAMES a frame means consider all windows on that frame only.
1982 Anything else means consider all windows on WINDOW's frame and no
1985 If you use consistent values for MINIBUF and ALL-FRAMES, you can use
1986 `next-window' to iterate through the entire cycle of acceptable
1987 windows, eventually ending up back at the window you started with.
1988 `previous-window' traverses the same cycle, in the reverse order. */)
1989 (Lisp_Object window
, Lisp_Object minibuf
, Lisp_Object all_frames
)
1991 return next_window (window
, minibuf
, all_frames
, 1);
1995 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1996 doc
: /* Return window preceding WINDOW in cyclic ordering of windows.
1997 WINDOW defaults to the selected window. The optional arguments
1998 MINIBUF and ALL-FRAMES specify the set of windows to consider.
1999 For the precise meaning of these arguments see `next-window'.
2001 If you use consistent values for MINIBUF and ALL-FRAMES, you can
2002 use `previous-window' to iterate through the entire cycle of
2003 acceptable windows, eventually ending up back at the window you
2004 started with. `next-window' traverses the same cycle, in the
2006 (Lisp_Object window
, Lisp_Object minibuf
, Lisp_Object all_frames
)
2008 return next_window (window
, minibuf
, all_frames
, 0);
2012 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
2013 doc
: /* Select another window in cyclic ordering of windows.
2014 COUNT specifies the number of windows to skip, starting with the
2015 selected window, before making the selection. If COUNT is
2016 positive, skip COUNT windows forwards. If COUNT is negative,
2017 skip -COUNT windows backwards. COUNT zero means do not skip any
2018 window, so select the selected window. In an interactive call,
2019 COUNT is the numeric prefix argument. Return nil.
2021 This function uses `next-window' for finding the window to select.
2022 The argument ALL-FRAMES has the same meaning as in `next-window',
2023 but the MINIBUF argument of `next-window' is always effectively
2025 (Lisp_Object count
, Lisp_Object all_frames
)
2030 CHECK_NUMBER (count
);
2031 window
= selected_window
;
2033 for (i
= XINT (count
); i
> 0; --i
)
2034 window
= Fnext_window (window
, Qnil
, all_frames
);
2036 window
= Fprevious_window (window
, Qnil
, all_frames
);
2038 Fselect_window (window
, Qnil
);
2043 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
2044 doc
: /* Return a list of windows on FRAME, starting with WINDOW.
2045 FRAME nil or omitted means use the selected frame.
2046 WINDOW nil or omitted means use the selected window.
2047 MINIBUF t means include the minibuffer window, even if it isn't active.
2048 MINIBUF nil or omitted means include the minibuffer window only
2050 MINIBUF neither nil nor t means never include the minibuffer window. */)
2051 (Lisp_Object frame
, Lisp_Object minibuf
, Lisp_Object window
)
2054 window
= FRAMEP (frame
) ? XFRAME (frame
)->selected_window
: selected_window
;
2055 CHECK_WINDOW (window
);
2057 frame
= selected_frame
;
2059 if (!EQ (frame
, XWINDOW (window
)->frame
))
2060 error ("Window is on a different frame");
2062 return window_list_1 (window
, minibuf
, frame
);
2066 /* Return a list of windows in cyclic ordering. Arguments are like
2067 for `next-window'. */
2070 window_list_1 (Lisp_Object window
, Lisp_Object minibuf
, Lisp_Object all_frames
)
2072 Lisp_Object tail
, list
, rest
;
2074 decode_next_window_args (&window
, &minibuf
, &all_frames
);
2077 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
2078 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
2079 list
= Fcons (XCAR (tail
), list
);
2081 /* Rotate the list to start with WINDOW. */
2082 list
= Fnreverse (list
);
2083 rest
= Fmemq (window
, list
);
2084 if (!NILP (rest
) && !EQ (rest
, list
))
2086 for (tail
= list
; !EQ (XCDR (tail
), rest
); tail
= XCDR (tail
))
2088 XSETCDR (tail
, Qnil
);
2089 list
= nconc2 (rest
, list
);
2096 /* Look at all windows, performing an operation specified by TYPE
2098 If FRAMES is Qt, look at all frames;
2099 Qnil, look at just the selected frame;
2100 Qvisible, look at visible frames;
2101 a frame, just look at windows on that frame.
2102 If MINI is non-zero, perform the operation on minibuffer windows too. */
2107 GET_BUFFER_WINDOW
, /* Arg is buffer */
2108 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
2109 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
2110 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
2112 UNSHOW_BUFFER
, /* Arg is buffer */
2113 REDISPLAY_BUFFER_WINDOWS
, /* Arg is buffer */
2118 window_loop (enum window_loop type
, Lisp_Object obj
, int mini
, Lisp_Object frames
)
2120 Lisp_Object window
, windows
, best_window
, frame_arg
;
2122 struct gcpro gcpro1
;
2124 /* If we're only looping through windows on a particular frame,
2125 frame points to that frame. If we're looping through windows
2126 on all frames, frame is 0. */
2127 if (FRAMEP (frames
))
2128 f
= XFRAME (frames
);
2129 else if (NILP (frames
))
2130 f
= SELECTED_FRAME ();
2135 frame_arg
= Qlambda
;
2136 else if (EQ (frames
, make_number (0)))
2138 else if (EQ (frames
, Qvisible
))
2143 /* frame_arg is Qlambda to stick to one frame,
2144 Qvisible to consider all visible frames,
2147 /* Pick a window to start with. */
2151 window
= FRAME_SELECTED_WINDOW (f
);
2153 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
2155 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
2159 for (; CONSP (windows
); windows
= XCDR (windows
))
2163 window
= XCAR (windows
);
2164 w
= XWINDOW (window
);
2166 /* Note that we do not pay attention here to whether the frame
2167 is visible, since Fwindow_list skips non-visible frames if
2168 that is desired, under the control of frame_arg. */
2169 if (!MINI_WINDOW_P (w
)
2170 /* For UNSHOW_BUFFER, we must always consider all windows. */
2171 || type
== UNSHOW_BUFFER
2172 || (mini
&& minibuf_level
> 0))
2175 case GET_BUFFER_WINDOW
:
2176 if (EQ (w
->buffer
, obj
)
2177 /* Don't find any minibuffer window
2178 except the one that is currently in use. */
2179 && (MINI_WINDOW_P (w
)
2180 ? EQ (window
, minibuf_window
)
2183 if (NILP (best_window
))
2184 best_window
= window
;
2185 else if (EQ (window
, selected_window
))
2186 /* Prefer to return selected-window. */
2187 RETURN_UNGCPRO (window
);
2188 else if (EQ (Fwindow_frame (window
), selected_frame
))
2189 /* Prefer windows on the current frame. */
2190 best_window
= window
;
2194 case GET_LRU_WINDOW
:
2195 /* `obj' is an integer encoding a bitvector.
2196 `obj & 1' means consider only full-width windows.
2197 `obj & 2' means consider also dedicated windows. */
2198 if (((XINT (obj
) & 1) && !WINDOW_FULL_WIDTH_P (w
))
2199 || (!(XINT (obj
) & 2) && !NILP (w
->dedicated
))
2200 /* Minibuffer windows are always ignored. */
2201 || MINI_WINDOW_P (w
))
2203 if (NILP (best_window
)
2204 || (XFASTINT (XWINDOW (best_window
)->use_time
)
2205 > XFASTINT (w
->use_time
)))
2206 best_window
= window
;
2209 case DELETE_OTHER_WINDOWS
:
2210 if (!EQ (window
, obj
))
2211 Fdelete_window (window
);
2214 case DELETE_BUFFER_WINDOWS
:
2215 if (EQ (w
->buffer
, obj
))
2217 struct frame
*fr
= XFRAME (WINDOW_FRAME (w
));
2219 /* If this window is dedicated, and in a frame of its own,
2221 if (EQ (window
, FRAME_ROOT_WINDOW (fr
))
2222 && !NILP (w
->dedicated
)
2223 && other_visible_frames (fr
))
2225 /* Skip the other windows on this frame.
2226 There might be one, the minibuffer! */
2227 while (CONSP (XCDR (windows
))
2228 && EQ (XWINDOW (XCAR (windows
))->frame
,
2229 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2230 windows
= XCDR (windows
);
2232 /* Now we can safely delete the frame. */
2233 delete_frame (w
->frame
, Qnil
);
2235 else if (NILP (w
->parent
))
2237 /* If we're deleting the buffer displayed in the
2238 only window on the frame, find a new buffer to
2241 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2242 /* Reset dedicated state of window. */
2243 w
->dedicated
= Qnil
;
2244 Fset_window_buffer (window
, buffer
, Qnil
);
2245 if (EQ (window
, selected_window
))
2246 Fset_buffer (w
->buffer
);
2249 Fdelete_window (window
);
2253 case GET_LARGEST_WINDOW
:
2254 { /* nil `obj' means to ignore dedicated windows. */
2255 /* Ignore dedicated windows and minibuffers. */
2256 if (MINI_WINDOW_P (w
) || (NILP (obj
) && !NILP (w
->dedicated
)))
2259 if (NILP (best_window
))
2260 best_window
= window
;
2263 struct window
*b
= XWINDOW (best_window
);
2264 if (XFASTINT (w
->total_lines
) * XFASTINT (w
->total_cols
)
2265 > XFASTINT (b
->total_lines
) * XFASTINT (b
->total_cols
))
2266 best_window
= window
;
2272 if (EQ (w
->buffer
, obj
))
2275 struct frame
*fr
= XFRAME (w
->frame
);
2277 /* Find another buffer to show in this window. */
2278 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
2280 /* If this window is dedicated, and in a frame of its own,
2282 if (EQ (window
, FRAME_ROOT_WINDOW (fr
))
2283 && !NILP (w
->dedicated
)
2284 && other_visible_frames (fr
))
2286 /* Skip the other windows on this frame.
2287 There might be one, the minibuffer! */
2288 while (CONSP (XCDR (windows
))
2289 && EQ (XWINDOW (XCAR (windows
))->frame
,
2290 XWINDOW (XCAR (XCDR (windows
)))->frame
))
2291 windows
= XCDR (windows
);
2293 /* Now we can safely delete the frame. */
2294 delete_frame (w
->frame
, Qnil
);
2296 else if (!NILP (w
->dedicated
) && !NILP (w
->parent
))
2298 Lisp_Object window_to_delete
;
2299 XSETWINDOW (window_to_delete
, w
);
2300 /* If this window is dedicated and not the only window
2301 in its frame, then kill it. */
2302 Fdelete_window (window_to_delete
);
2306 /* Otherwise show a different buffer in the window. */
2307 w
->dedicated
= Qnil
;
2308 Fset_window_buffer (window
, buffer
, Qnil
);
2309 if (EQ (window
, selected_window
))
2310 Fset_buffer (w
->buffer
);
2315 case REDISPLAY_BUFFER_WINDOWS
:
2316 if (EQ (w
->buffer
, obj
))
2318 mark_window_display_accurate (window
, 0);
2319 w
->update_mode_line
= Qt
;
2320 XBUFFER (obj
)->prevent_redisplay_optimizations_p
= 1;
2321 ++update_mode_lines
;
2322 best_window
= window
;
2326 /* Check for a window that has a killed buffer. */
2327 case CHECK_ALL_WINDOWS
:
2328 if (! NILP (w
->buffer
)
2329 && NILP (BVAR (XBUFFER (w
->buffer
), name
)))
2333 case WINDOW_LOOP_UNUSED
:
2342 /* Used for debugging. Abort if any window has a dead buffer. */
2344 extern void check_all_windows (void) EXTERNALLY_VISIBLE
;
2346 check_all_windows (void)
2348 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
2351 DEFUN ("window-use-time", Fwindow_use_time
, Swindow_use_time
, 0, 1, 0,
2352 doc
: /* Return WINDOW's use time.
2353 WINDOW defaults to the selected window. The window with the highest use
2354 time is the most recently selected one. The window with the lowest use
2355 time is the least recently selected one. */)
2356 (Lisp_Object window
)
2358 return decode_window (window
)->use_time
;
2361 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 2, 0,
2362 doc
: /* Return the window least recently selected or used for display.
2363 \(LRU means Least Recently Used.)
2365 Return a full-width window if possible.
2366 A minibuffer window is never a candidate.
2367 A dedicated window is never a candidate, unless DEDICATED is non-nil,
2368 so if all windows are dedicated, the value is nil.
2369 If optional argument FRAME is `visible', search all visible frames.
2370 If FRAME is 0, search all visible and iconified frames.
2371 If FRAME is t, search all frames.
2372 If FRAME is nil, search only the selected frame.
2373 If FRAME is a frame, search only that frame. */)
2374 (Lisp_Object frame
, Lisp_Object dedicated
)
2376 register Lisp_Object w
;
2377 /* First try for a window that is full-width */
2378 w
= window_loop (GET_LRU_WINDOW
,
2379 NILP (dedicated
) ? make_number (1) : make_number (3),
2381 if (!NILP (w
) && !EQ (w
, selected_window
))
2383 /* If none of them, try the rest */
2384 return window_loop (GET_LRU_WINDOW
,
2385 NILP (dedicated
) ? make_number (0) : make_number (2),
2389 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 2, 0,
2390 doc
: /* Return the largest window in area.
2391 A minibuffer window is never a candidate.
2392 A dedicated window is never a candidate unless DEDICATED is non-nil,
2393 so if all windows are dedicated, the value is nil.
2394 If optional argument FRAME is `visible', search all visible frames.
2395 If FRAME is 0, search all visible and iconified frames.
2396 If FRAME is t, search all frames.
2397 If FRAME is nil, search only the selected frame.
2398 If FRAME is a frame, search only that frame. */)
2399 (Lisp_Object frame
, Lisp_Object dedicated
)
2401 return window_loop (GET_LARGEST_WINDOW
, dedicated
, 0,
2405 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 0, 2, 0,
2406 doc
: /* Return a window currently displaying BUFFER-OR-NAME, or nil if none.
2407 BUFFER-OR-NAME may be a buffer or a buffer name and defaults to the
2409 If optional argument FRAME is `visible', search all visible frames.
2410 If optional argument FRAME is 0, search all visible and iconified frames.
2411 If FRAME is t, search all frames.
2412 If FRAME is nil, search only the selected frame.
2413 If FRAME is a frame, search only that frame. */)
2414 (Lisp_Object buffer_or_name
, Lisp_Object frame
)
2418 if (NILP (buffer_or_name
))
2419 buffer
= Fcurrent_buffer ();
2421 buffer
= Fget_buffer (buffer_or_name
);
2423 if (BUFFERP (buffer
))
2424 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
2429 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
2431 doc
: /* Make WINDOW (or the selected window) fill its frame.
2432 Only the frame WINDOW is on is affected.
2433 This function tries to reduce display jumps by keeping the text
2434 previously visible in WINDOW in the same place on the frame. Doing this
2435 depends on the value of (window-start WINDOW), so if calling this
2436 function in a program gives strange scrolling, make sure the
2437 window-start value is reasonable when this function is called. */)
2438 (Lisp_Object window
)
2445 window
= selected_window
;
2447 CHECK_LIVE_WINDOW (window
);
2448 w
= XWINDOW (window
);
2450 startpos
= marker_position (w
->start
);
2451 top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2453 if (MINI_WINDOW_P (w
) && top
> 0)
2454 error ("Can't expand minibuffer to full frame");
2456 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2458 /* Try to minimize scrolling, by setting the window start to the point
2459 will cause the text at the old window start to be at the same place
2460 on the frame. But don't try to do this if the window start is
2461 outside the visible portion (as might happen when the display is
2462 not current, due to typeahead). */
2463 new_top
= WINDOW_TOP_EDGE_LINE (w
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2465 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2466 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2468 struct position pos
;
2469 struct buffer
*obuf
= current_buffer
;
2471 Fset_buffer (w
->buffer
);
2472 /* This computation used to temporarily move point, but that can
2473 have unwanted side effects due to text properties. */
2474 pos
= *vmotion (startpos
, -top
, w
);
2476 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2477 w
->window_end_valid
= Qnil
;
2478 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2479 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2481 /* We need to do this, so that the window-scroll-functions
2483 w
->optional_new_start
= Qt
;
2485 set_buffer_internal (obuf
);
2491 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2492 0, 2, "bDelete windows on (buffer): ",
2493 doc
: /* Delete all windows showing BUFFER-OR-NAME.
2494 BUFFER-OR-NAME may be a buffer or the name of an existing buffer and
2495 defaults to the current buffer.
2497 Optional second argument FRAME controls which frames are affected.
2498 If optional argument FRAME is `visible', search all visible frames.
2499 If FRAME is 0, search all visible and iconified frames.
2500 If FRAME is nil, search all frames.
2501 If FRAME is t, search only the selected frame.
2502 If FRAME is a frame, search only that frame.
2503 When a window showing BUFFER-OR-NAME is dedicated and the only window of
2504 its frame, that frame is deleted when there are other frames left. */)
2505 (Lisp_Object buffer_or_name
, Lisp_Object frame
)
2509 /* FRAME uses t and nil to mean the opposite of what window_loop
2513 else if (EQ (frame
, Qt
))
2516 if (NILP (buffer_or_name
))
2517 buffer
= Fcurrent_buffer ();
2520 buffer
= Fget_buffer (buffer_or_name
);
2521 CHECK_BUFFER (buffer
);
2524 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2529 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2530 Sreplace_buffer_in_windows
,
2531 0, 1, "bReplace buffer in windows: ",
2532 doc
: /* Replace BUFFER-OR-NAME with some other buffer in all windows showing it.
2533 BUFFER-OR-NAME may be a buffer or the name of an existing buffer and
2534 defaults to the current buffer.
2536 When a window showing BUFFER-OR-NAME is dedicated that window is
2537 deleted. If that window is the only window on its frame, that frame is
2538 deleted too when there are other frames left. If there are no other
2539 frames left, some other buffer is displayed in that window. */)
2540 (Lisp_Object buffer_or_name
)
2544 if (NILP (buffer_or_name
))
2545 buffer
= Fcurrent_buffer ();
2548 buffer
= Fget_buffer (buffer_or_name
);
2549 CHECK_BUFFER (buffer
);
2552 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2557 /* Replace BUFFER with some other buffer in all windows
2558 of all frames, even those on other keyboards. */
2561 replace_buffer_in_all_windows (Lisp_Object buffer
)
2563 Lisp_Object tail
, frame
;
2565 /* A single call to window_loop won't do the job
2566 because it only considers frames on the current keyboard.
2567 So loop manually over frames, and handle each one. */
2568 FOR_EACH_FRAME (tail
, frame
)
2569 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2572 /* Set the height of WINDOW and all its inferiors. */
2574 /* The smallest acceptable dimensions for a window. Anything smaller
2575 might crash Emacs. */
2577 #define MIN_SAFE_WINDOW_WIDTH (2)
2578 #define MIN_SAFE_WINDOW_HEIGHT (1)
2580 /* For wp non-zero the total number of columns of window w. Otherwise
2581 the total number of lines of w. */
2583 #define WINDOW_TOTAL_SIZE(w, wp) \
2584 (wp ? WINDOW_TOTAL_COLS (w) : WINDOW_TOTAL_LINES (w))
2586 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2587 minimum allowable size. */
2590 check_frame_size (FRAME_PTR frame
, int *rows
, int *cols
)
2592 /* For height, we have to see:
2593 how many windows the frame has at minimum (one or two),
2594 and whether it has a menu bar or other special stuff at the top. */
2596 = ((FRAME_MINIBUF_ONLY_P (frame
) || ! FRAME_HAS_MINIBUF_P (frame
))
2597 ? MIN_SAFE_WINDOW_HEIGHT
2598 : 2 * MIN_SAFE_WINDOW_HEIGHT
);
2600 if (FRAME_TOP_MARGIN (frame
) > 0)
2601 min_height
+= FRAME_TOP_MARGIN (frame
);
2603 if (*rows
< min_height
)
2605 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2606 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2609 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2610 check if W's width can be changed, otherwise check W's height.
2611 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2612 siblings, too. If none of the siblings is resizable, WINDOW isn't
2616 window_fixed_size_p (struct window
*w
, int width_p
, int check_siblings_p
)
2621 if (!NILP (w
->hchild
))
2623 c
= XWINDOW (w
->hchild
);
2627 /* A horizontal combination is fixed-width if all of if its
2629 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2630 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2631 fixed_p
= c
== NULL
;
2635 /* A horizontal combination is fixed-height if one of if its
2637 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2638 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2639 fixed_p
= c
!= NULL
;
2642 else if (!NILP (w
->vchild
))
2644 c
= XWINDOW (w
->vchild
);
2648 /* A vertical combination is fixed-width if one of if its
2650 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2651 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2652 fixed_p
= c
!= NULL
;
2656 /* A vertical combination is fixed-height if all of if its
2658 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2659 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2660 fixed_p
= c
== NULL
;
2663 else if (BUFFERP (w
->buffer
))
2665 struct buffer
*old
= current_buffer
;
2668 current_buffer
= XBUFFER (w
->buffer
);
2669 val
= find_symbol_value (Qwindow_size_fixed
);
2670 current_buffer
= old
;
2673 if (!EQ (val
, Qunbound
))
2675 fixed_p
= !NILP (val
);
2678 && ((EQ (val
, Qheight
) && width_p
)
2679 || (EQ (val
, Qwidth
) && !width_p
)))
2683 /* Can't tell if this one is resizable without looking at
2684 siblings. If all siblings are fixed-size this one is too. */
2685 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2689 for (child
= w
->prev
; WINDOWP (child
); child
= XWINDOW (child
)->prev
)
2690 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2694 for (child
= w
->next
; WINDOWP (child
); child
= XWINDOW (child
)->next
)
2695 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2708 /* Return minimum size of leaf window W. WIDTH_P non-zero means return
2709 the minimum width of W, WIDTH_P zero means return the minimum height
2710 of W. SAFE_P non-zero means ignore window-min-height|width but just
2711 return values that won't crash Emacs and don't hide components like
2712 fringes, scrollbars, or modelines. If WIDTH_P is zero and W is the
2713 minibuffer window, always return 1. */
2716 window_min_size_2 (struct window
*w
, int width_p
, int safe_p
)
2718 /* We should consider buffer-local values of window_min_height and
2719 window_min_width here. */
2722 int safe_size
= (MIN_SAFE_WINDOW_WIDTH
2723 + WINDOW_FRINGE_COLS (w
)
2724 + WINDOW_SCROLL_BAR_COLS (w
));
2726 return safe_p
? safe_size
: max (window_min_width
, safe_size
);
2728 else if (MINI_WINDOW_P (w
))
2732 int safe_size
= (MIN_SAFE_WINDOW_HEIGHT
2733 + ((BUFFERP (w
->buffer
)
2734 && !NILP (BVAR (XBUFFER (w
->buffer
), mode_line_format
)))
2737 return safe_p
? safe_size
: max (window_min_height
, safe_size
);
2741 /* Return minimum size of window W, not taking fixed-width windows into
2742 account. WIDTH_P non-zero means return the minimum width, otherwise
2743 return the minimum height. SAFE_P non-zero means ignore
2744 window-min-height|width but just return values that won't crash Emacs
2745 and don't hide components like fringes, scrollbars, or modelines. If
2746 W is a combination window, compute the minimum size from the minimum
2747 sizes of W's children. */
2750 window_min_size_1 (struct window
*w
, int width_p
, int safe_p
)
2755 if (!NILP (w
->hchild
))
2757 /* W is a horizontal combination. */
2758 c
= XWINDOW (w
->hchild
);
2763 /* The minimum width of a horizontal combination is the sum of
2764 the minimum widths of its children. */
2767 size
+= window_min_size_1 (c
, 1, safe_p
);
2768 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2773 /* The minimum height of a horizontal combination is the
2774 maximum of the minimum heights of its children. */
2777 size
= max (window_min_size_1 (c
, 0, safe_p
), size
);
2778 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2782 else if (!NILP (w
->vchild
))
2784 /* W is a vertical combination. */
2785 c
= XWINDOW (w
->vchild
);
2790 /* The minimum width of a vertical combination is the maximum
2791 of the minimum widths of its children. */
2794 size
= max (window_min_size_1 (c
, 1, safe_p
), size
);
2795 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2800 /* The minimum height of a vertical combination is the sum of
2801 the minimum height of its children. */
2804 size
+= window_min_size_1 (c
, 0, safe_p
);
2805 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2810 /* W is a leaf window. */
2811 size
= window_min_size_2 (w
, width_p
, safe_p
);
2816 /* Return the minimum size of window W, taking fixed-size windows into
2817 account. WIDTH_P non-zero means return the minimum width, otherwise
2818 return the minimum height. SAFE_P non-zero means ignore
2819 window-min-height|width but just return values that won't crash Emacs
2820 and don't hide components like fringes, scrollbars, or modelines.
2821 IGNORE_FIXED_P non-zero means ignore if W is fixed-size. Set *FIXED
2822 to 1 if W is fixed-size unless FIXED is null. */
2825 window_min_size (struct window
*w
, int width_p
, int safe_p
, int ignore_fixed_p
, int *fixed
)
2832 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2838 size
= WINDOW_TOTAL_SIZE (w
, width_p
);
2840 size
= window_min_size_1 (w
, width_p
, safe_p
);
2846 /* Adjust the margins of window W if text area is too small.
2847 Return 1 if window width is ok after adjustment; 0 if window
2848 is still too narrow. */
2851 adjust_window_margins (struct window
*w
)
2853 int box_cols
= (WINDOW_TOTAL_COLS (w
)
2854 - WINDOW_FRINGE_COLS (w
)
2855 - WINDOW_SCROLL_BAR_COLS (w
));
2856 int margin_cols
= (WINDOW_LEFT_MARGIN_COLS (w
)
2857 + WINDOW_RIGHT_MARGIN_COLS (w
));
2859 if (box_cols
- margin_cols
>= MIN_SAFE_WINDOW_WIDTH
)
2862 if (margin_cols
< 0 || box_cols
< MIN_SAFE_WINDOW_WIDTH
)
2865 /* Window's text area is too narrow, but reducing the window
2866 margins will fix that. */
2867 margin_cols
= box_cols
- MIN_SAFE_WINDOW_WIDTH
;
2868 if (WINDOW_RIGHT_MARGIN_COLS (w
) > 0)
2870 if (WINDOW_LEFT_MARGIN_COLS (w
) > 0)
2871 w
->left_margin_cols
= w
->right_margin_cols
2872 = make_number (margin_cols
/2);
2874 w
->right_margin_cols
= make_number (margin_cols
);
2877 w
->left_margin_cols
= make_number (margin_cols
);
2881 /* Calculate new sizes for windows in the list FORWARD when their
2882 compound size goes from TOTAL to SIZE. TOTAL must be greater than
2883 SIZE. The number of windows in FORWARD is NCHILDREN, and the number
2884 that can shrink is SHRINKABLE. Fixed-size windows may be shrunk if
2885 and only if RESIZE_FIXED_P is non-zero. WIDTH_P non-zero means
2886 shrink columns, otherwise shrink lines.
2888 SAFE_P zero means windows may be sized down to window-min-height
2889 lines (window-min-window columns for WIDTH_P non-zero). SAFE_P
2890 non-zero means windows may be sized down to their minimum safe sizes
2891 taking into account the space needed to display modelines, fringes,
2894 This function returns an allocated array of new sizes that the caller
2895 must free. A size -1 means the window is fixed and RESIZE_FIXED_P is
2896 zero. A size zero means the window shall be deleted. Array index 0
2897 refers to the first window in FORWARD, 1 to the second, and so on.
2899 This function resizes windows proportionally to their size. It also
2900 tries to preserve smaller windows by resizing larger windows before
2901 resizing any window to zero. If resize_proportionally is non-nil for
2902 a specific window, it will attempt to strictly resize that window
2903 proportionally, even at the expense of deleting smaller windows. */
2905 shrink_windows (int total
, int size
, int nchildren
, int shrinkable
,
2906 int resize_fixed_p
, Lisp_Object forward
, int width_p
, int safe_p
)
2908 int available_resize
= 0;
2909 int *new_sizes
, *min_sizes
;
2912 int smallest
= total
;
2913 int total_removed
= 0;
2914 int total_shrink
= total
- size
;
2917 new_sizes
= xmalloc (sizeof (*new_sizes
) * nchildren
);
2918 min_sizes
= xmalloc (sizeof (*min_sizes
) * nchildren
);
2920 for (i
= 0, child
= forward
; !NILP (child
); child
= c
->next
, ++i
)
2924 c
= XWINDOW (child
);
2925 child_size
= WINDOW_TOTAL_SIZE (c
, width_p
);
2927 if (!resize_fixed_p
&& window_fixed_size_p (c
, width_p
, 0))
2931 new_sizes
[i
] = child_size
;
2932 min_sizes
[i
] = window_min_size_1 (c
, width_p
, safe_p
);
2933 if (child_size
> min_sizes
[i
]
2934 && NILP (c
->resize_proportionally
))
2935 available_resize
+= child_size
- min_sizes
[i
];
2938 /* We might need to shrink some windows to zero. Find the smallest
2939 windows and set them to 0 until we can fulfil the new size. */
2941 while (shrinkable
> 1 && size
+ available_resize
< total
)
2943 for (i
= 0; i
< nchildren
; ++i
)
2944 if (new_sizes
[i
] > 0 && smallest
> new_sizes
[i
])
2945 smallest
= new_sizes
[i
];
2947 for (i
= 0; i
< nchildren
; ++i
)
2948 if (new_sizes
[i
] == smallest
)
2950 /* Resize this window down to zero. */
2952 if (smallest
> min_sizes
[i
])
2953 available_resize
-= smallest
- min_sizes
[i
];
2954 available_resize
+= smallest
;
2956 total_removed
+= smallest
;
2958 /* We don't know what the smallest is now. */
2961 /* Out of for, just remove one window at the time and
2962 check again if we have enough space. */
2967 /* Now, calculate the new sizes. Try to shrink each window
2968 proportional to its size. */
2969 for (i
= 0; i
< nchildren
; ++i
)
2971 if (new_sizes
[i
] > min_sizes
[i
])
2973 int to_shrink
= total_shrink
* new_sizes
[i
] / total
;
2975 if (new_sizes
[i
] - to_shrink
< min_sizes
[i
])
2976 to_shrink
= new_sizes
[i
] - min_sizes
[i
];
2977 new_sizes
[i
] -= to_shrink
;
2978 total_removed
+= to_shrink
;
2982 /* Any reminder due to rounding, we just subtract from windows
2983 that are left and still can be shrunk. */
2984 while (total_shrink
> total_removed
)
2986 int nonzero_sizes
= 0;
2988 for (i
= 0; i
< nchildren
; ++i
)
2989 if (new_sizes
[i
] > 0)
2992 for (i
= 0; i
< nchildren
; ++i
)
2993 if (new_sizes
[i
] > min_sizes
[i
])
2998 /* Out of for, just shrink one window at the time and
2999 check again if we have enough space. */
3003 /* Special case, only one window left. */
3004 if (nonzero_sizes
== 1)
3008 /* Any surplus due to rounding, we add to windows that are left. */
3009 while (total_shrink
< total_removed
)
3011 for (i
= 0; i
< nchildren
; ++i
)
3013 if (new_sizes
[i
] != 0 && total_shrink
< total_removed
)
3027 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
3028 WINDOW's width. Resize WINDOW's children, if any, so that they keep
3029 their proportionate size relative to WINDOW.
3031 If FIRST_ONLY is 1, change only the first of WINDOW's children when
3032 they are in series. If LAST_ONLY is 1, change only the last of
3033 WINDOW's children when they are in series.
3035 Propagate WINDOW's top or left edge position to children. Delete
3036 windows that become too small unless NODELETE_P is 1. When
3037 NODELETE_P equals 2 do not honor settings for window-min-height and
3038 window-min-width when resizing windows but use safe defaults instead.
3039 This should give better behavior when resizing frames. */
3042 size_window (Lisp_Object window
, int size
, int width_p
, int nodelete_p
, int first_only
, int last_only
)
3044 struct window
*w
= XWINDOW (window
);
3046 Lisp_Object child
, *forward
, *sideward
;
3047 int old_size
= WINDOW_TOTAL_SIZE (w
, width_p
);
3049 size
= max (0, size
);
3051 /* Delete WINDOW if it's too small. */
3052 if (nodelete_p
!= 1 && !NILP (w
->parent
)
3053 && size
< window_min_size_1 (w
, width_p
, nodelete_p
== 2))
3055 delete_window (window
);
3059 /* Set redisplay hints. */
3060 w
->last_modified
= make_number (0);
3061 w
->last_overlay_modified
= make_number (0);
3062 windows_or_buffers_changed
++;
3063 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
3067 sideward
= &w
->vchild
;
3068 forward
= &w
->hchild
;
3069 w
->total_cols
= make_number (size
);
3070 adjust_window_margins (w
);
3074 sideward
= &w
->hchild
;
3075 forward
= &w
->vchild
;
3076 w
->total_lines
= make_number (size
);
3077 w
->orig_total_lines
= Qnil
;
3080 if (!NILP (*sideward
))
3082 /* We have a chain of parallel siblings whose size should all change. */
3083 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
3085 c
= XWINDOW (child
);
3087 c
->left_col
= w
->left_col
;
3089 c
->top_line
= w
->top_line
;
3090 size_window (child
, size
, width_p
, nodelete_p
,
3091 first_only
, last_only
);
3094 else if (!NILP (*forward
) && last_only
)
3096 /* Change the last in a series of siblings. */
3097 Lisp_Object last_child
;
3100 for (child
= *forward
; !NILP (child
); child
= c
->next
)
3102 c
= XWINDOW (child
);
3106 child_size
= WINDOW_TOTAL_SIZE (c
, width_p
);
3107 size_window (last_child
, size
- old_size
+ child_size
,
3108 width_p
, nodelete_p
, first_only
, last_only
);
3110 else if (!NILP (*forward
) && first_only
)
3112 /* Change the first in a series of siblings. */
3116 c
= XWINDOW (child
);
3119 c
->left_col
= w
->left_col
;
3121 c
->top_line
= w
->top_line
;
3123 child_size
= WINDOW_TOTAL_SIZE (c
, width_p
);
3124 size_window (child
, size
- old_size
+ child_size
,
3125 width_p
, nodelete_p
, first_only
, last_only
);
3127 else if (!NILP (*forward
))
3129 int fixed_size
, each
IF_LINT (= 0), extra
IF_LINT (= 0), n
;
3130 int resize_fixed_p
, nfixed
;
3131 int last_pos
, first_pos
, nchildren
, total
;
3132 int *new_sizes
= NULL
;
3134 /* Determine the fixed-size portion of this window, and the
3135 number of child windows. */
3136 fixed_size
= nchildren
= nfixed
= total
= 0;
3137 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
3141 c
= XWINDOW (child
);
3142 child_size
= WINDOW_TOTAL_SIZE (c
, width_p
);
3143 total
+= child_size
;
3145 if (window_fixed_size_p (c
, width_p
, 0))
3147 fixed_size
+= child_size
;
3152 /* If the new size is smaller than fixed_size, or if there
3153 aren't any resizable windows, allow resizing fixed-size
3155 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
3157 /* Compute how many lines/columns to add/remove to each child. The
3158 value of extra takes care of rounding errors. */
3159 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
3160 if (size
< total
&& n
> 1)
3161 new_sizes
= shrink_windows (total
, size
, nchildren
, n
,
3162 resize_fixed_p
, *forward
, width_p
,
3166 each
= (size
- total
) / n
;
3167 extra
= (size
- total
) - n
* each
;
3170 /* Compute new children heights and edge positions. */
3171 first_pos
= width_p
? XINT (w
->left_col
) : XINT (w
->top_line
);
3172 last_pos
= first_pos
;
3173 for (n
= 0, child
= *forward
; !NILP (child
); child
= c
->next
, ++n
)
3175 int new_child_size
, old_child_size
;
3177 c
= XWINDOW (child
);
3178 old_child_size
= WINDOW_TOTAL_SIZE (c
, width_p
);
3179 new_child_size
= old_child_size
;
3181 /* The top or left edge position of this child equals the
3182 bottom or right edge of its predecessor. */
3184 c
->left_col
= make_number (last_pos
);
3186 c
->top_line
= make_number (last_pos
);
3188 /* If this child can be resized, do it. */
3189 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
3192 new_sizes
? new_sizes
[n
] : old_child_size
+ each
+ extra
;
3196 /* Set new size. Note that size_window also propagates
3197 edge positions to children, so it's not a no-op if we
3198 didn't change the child's size. */
3199 size_window (child
, new_child_size
, width_p
, 1,
3200 first_only
, last_only
);
3202 /* Remember the bottom/right edge position of this child; it
3203 will be used to set the top/left edge of the next child. */
3204 last_pos
+= new_child_size
;
3209 /* We should have covered the parent exactly with child windows. */
3210 xassert (size
== last_pos
- first_pos
);
3212 /* Now delete any children that became too small. */
3213 if (nodelete_p
!= 1)
3214 for (child
= *forward
; !NILP (child
); child
= c
->next
)
3218 c
= XWINDOW (child
);
3219 child_size
= WINDOW_TOTAL_SIZE (c
, width_p
);
3220 size_window (child
, child_size
, width_p
, nodelete_p
,
3221 first_only
, last_only
);
3226 /* Set WINDOW's height to HEIGHT, and recursively change the height of
3227 WINDOW's children. NODELETE zero means windows that have become
3228 smaller than window-min-height in the process may be deleted.
3229 NODELETE 1 means never delete windows that become too small in the
3230 process. (The caller should check later and do so if appropriate.)
3231 NODELETE 2 means delete only windows that have become too small to be
3232 displayed correctly. */
3235 set_window_height (Lisp_Object window
, int height
, int nodelete
)
3237 size_window (window
, height
, 0, nodelete
, 0, 0);
3240 /* Set WINDOW's width to WIDTH, and recursively change the width of
3241 WINDOW's children. NODELETE zero means windows that have become
3242 smaller than window-min-width in the process may be deleted.
3243 NODELETE 1 means never delete windows that become too small in the
3244 process. (The caller should check later and do so if appropriate.)
3245 NODELETE 2 means delete only windows that have become too small to be
3246 displayed correctly. */
3249 set_window_width (Lisp_Object window
, int width
, int nodelete
)
3251 size_window (window
, width
, 1, nodelete
, 0, 0);
3254 /* Change window heights in windows rooted in WINDOW by N lines. */
3257 change_window_heights (Lisp_Object window
, int n
)
3259 struct window
*w
= XWINDOW (window
);
3261 XSETFASTINT (w
->top_line
, XFASTINT (w
->top_line
) + n
);
3262 XSETFASTINT (w
->total_lines
, XFASTINT (w
->total_lines
) - n
);
3264 if (INTEGERP (w
->orig_top_line
))
3265 XSETFASTINT (w
->orig_top_line
, XFASTINT (w
->orig_top_line
) + n
);
3266 if (INTEGERP (w
->orig_total_lines
))
3267 XSETFASTINT (w
->orig_total_lines
, XFASTINT (w
->orig_total_lines
) - n
);
3269 /* Handle just the top child in a vertical split. */
3270 if (!NILP (w
->vchild
))
3271 change_window_heights (w
->vchild
, n
);
3273 /* Adjust all children in a horizontal split. */
3274 for (window
= w
->hchild
; !NILP (window
); window
= w
->next
)
3276 w
= XWINDOW (window
);
3277 change_window_heights (window
, n
);
3282 int window_select_count
;
3284 static Lisp_Object
Fset_window_margins (Lisp_Object
, Lisp_Object
, Lisp_Object
);
3285 static Lisp_Object
Fset_window_fringes (Lisp_Object
, Lisp_Object
, Lisp_Object
,
3287 static Lisp_Object
Fset_window_scroll_bars (Lisp_Object
, Lisp_Object
,
3288 Lisp_Object
, Lisp_Object
);
3289 static Lisp_Object
Fset_window_vscroll (Lisp_Object
, Lisp_Object
, Lisp_Object
);
3292 run_funs (Lisp_Object funs
)
3294 for (; CONSP (funs
); funs
= XCDR (funs
))
3295 if (!EQ (XCAR (funs
), Qt
))
3296 call0 (XCAR (funs
));
3299 static Lisp_Object
select_window_norecord (Lisp_Object window
);
3300 static Lisp_Object
select_frame_norecord (Lisp_Object frame
);
3303 run_window_configuration_change_hook (struct frame
*f
)
3305 int count
= SPECPDL_INDEX ();
3306 Lisp_Object frame
, global_wcch
3307 = Fdefault_value (Qwindow_configuration_change_hook
);
3308 XSETFRAME (frame
, f
);
3310 if (NILP (Vrun_hooks
))
3313 if (SELECTED_FRAME () != f
)
3315 record_unwind_protect (select_frame_norecord
, Fselected_frame ());
3316 Fselect_frame (frame
, Qt
);
3319 /* Use the right buffer. Matters when running the local hooks. */
3320 if (current_buffer
!= XBUFFER (Fwindow_buffer (Qnil
)))
3322 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
3323 Fset_buffer (Fwindow_buffer (Qnil
));
3326 /* Look for buffer-local values. */
3328 Lisp_Object windows
= Fwindow_list (frame
, Qlambda
, Qnil
);
3329 for (; CONSP (windows
); windows
= XCDR (windows
))
3331 Lisp_Object window
= XCAR (windows
);
3332 Lisp_Object buffer
= Fwindow_buffer (window
);
3333 if (!NILP (Flocal_variable_p (Qwindow_configuration_change_hook
,
3336 int count1
= SPECPDL_INDEX ();
3337 record_unwind_protect (select_window_norecord
, Fselected_window ());
3338 select_window_norecord (window
);
3339 run_funs (Fbuffer_local_value (Qwindow_configuration_change_hook
,
3341 unbind_to (count1
, Qnil
);
3346 run_funs (global_wcch
);
3347 unbind_to (count
, Qnil
);
3350 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
3351 means it's allowed to run hooks. See make_frame for a case where
3352 it's not allowed. KEEP_MARGINS_P non-zero means that the current
3353 margins, fringes, and scroll-bar settings of the window are not
3354 reset from the buffer's local settings. */
3357 set_window_buffer (Lisp_Object window
, Lisp_Object buffer
, int run_hooks_p
, int keep_margins_p
)
3359 struct window
*w
= XWINDOW (window
);
3360 struct buffer
*b
= XBUFFER (buffer
);
3361 int count
= SPECPDL_INDEX ();
3362 int samebuf
= EQ (buffer
, w
->buffer
);
3366 if (EQ (window
, selected_window
))
3367 BVAR (b
, last_selected_window
) = window
;
3369 /* Let redisplay errors through. */
3370 b
->display_error_modiff
= 0;
3372 /* Update time stamps of buffer display. */
3373 if (INTEGERP (BVAR (b
, display_count
)))
3374 XSETINT (BVAR (b
, display_count
), XINT (BVAR (b
, display_count
)) + 1);
3375 BVAR (b
, display_time
) = Fcurrent_time ();
3377 XSETFASTINT (w
->window_end_pos
, 0);
3378 XSETFASTINT (w
->window_end_vpos
, 0);
3379 memset (&w
->last_cursor
, 0, sizeof w
->last_cursor
);
3380 w
->window_end_valid
= Qnil
;
3381 if (!(keep_margins_p
&& samebuf
))
3382 { /* If we're not actually changing the buffer, don't reset hscroll and
3383 vscroll. This case happens for example when called from
3384 change_frame_size_1, where we use a dummy call to
3385 Fset_window_buffer on the frame's selected window (and no other)
3386 just in order to run window-configuration-change-hook.
3387 Resetting hscroll and vscroll here is problematic for things like
3388 image-mode and doc-view-mode since it resets the image's position
3389 whenever we resize the frame. */
3390 w
->hscroll
= w
->min_hscroll
= make_number (0);
3392 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
3393 set_marker_restricted (w
->start
,
3394 make_number (b
->last_window_start
),
3396 w
->start_at_line_beg
= Qnil
;
3397 w
->force_start
= Qnil
;
3398 XSETFASTINT (w
->last_modified
, 0);
3399 XSETFASTINT (w
->last_overlay_modified
, 0);
3401 /* Maybe we could move this into the `if' but it's not obviously safe and
3402 I doubt it's worth the trouble. */
3403 windows_or_buffers_changed
++;
3405 /* We must select BUFFER for running the window-scroll-functions. */
3406 /* We can't check ! NILP (Vwindow_scroll_functions) here
3407 because that might itself be a local variable. */
3408 if (window_initialized
)
3410 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
3411 Fset_buffer (buffer
);
3414 XMARKER (w
->pointm
)->insertion_type
= !NILP (Vwindow_point_insertion_type
);
3416 if (!keep_margins_p
)
3418 /* Set left and right marginal area width etc. from buffer. */
3420 /* This may call adjust_window_margins three times, so
3421 temporarily disable window margins. */
3422 Lisp_Object save_left
= w
->left_margin_cols
;
3423 Lisp_Object save_right
= w
->right_margin_cols
;
3425 w
->left_margin_cols
= w
->right_margin_cols
= Qnil
;
3427 Fset_window_fringes (window
,
3428 BVAR (b
, left_fringe_width
), BVAR (b
, right_fringe_width
),
3429 BVAR (b
, fringes_outside_margins
));
3431 Fset_window_scroll_bars (window
,
3432 BVAR (b
, scroll_bar_width
),
3433 BVAR (b
, vertical_scroll_bar_type
), Qnil
);
3435 w
->left_margin_cols
= save_left
;
3436 w
->right_margin_cols
= save_right
;
3438 Fset_window_margins (window
,
3439 BVAR (b
, left_margin_cols
), BVAR (b
, right_margin_cols
));
3444 if (! NILP (Vwindow_scroll_functions
))
3445 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
3446 Fmarker_position (w
->start
));
3447 run_window_configuration_change_hook (XFRAME (WINDOW_FRAME (w
)));
3450 unbind_to (count
, Qnil
);
3454 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 3, 0,
3455 doc
: /* Make WINDOW display BUFFER-OR-NAME as its contents.
3456 WINDOW defaults to the selected window. BUFFER-OR-NAME must be a buffer
3457 or the name of an existing buffer. Optional third argument KEEP-MARGINS
3458 non-nil means that WINDOW's current display margins, fringe widths, and
3459 scroll bar settings are preserved; the default is to reset these from
3460 the local settings for BUFFER-OR-NAME or the frame defaults. Return nil.
3462 This function throws an error when WINDOW is strongly dedicated to its
3463 buffer (that is `window-dedicated-p' returns t for WINDOW) and does not
3464 already display BUFFER-OR-NAME.
3466 This function runs `window-scroll-functions' before running
3467 `window-configuration-change-hook'. */)
3468 (register Lisp_Object window
, Lisp_Object buffer_or_name
, Lisp_Object keep_margins
)
3470 register Lisp_Object tem
, buffer
;
3471 register struct window
*w
= decode_window (window
);
3473 XSETWINDOW (window
, w
);
3474 buffer
= Fget_buffer (buffer_or_name
);
3475 CHECK_BUFFER (buffer
);
3476 if (NILP (BVAR (XBUFFER (buffer
), name
)))
3477 error ("Attempt to display deleted buffer");
3481 error ("Window is deleted");
3482 else if (!EQ (tem
, Qt
))
3483 /* w->buffer is t when the window is first being set up. */
3485 if (EQ (tem
, buffer
))
3487 else if (EQ (w
->dedicated
, Qt
))
3488 error ("Window is dedicated to `%s'", SDATA (BVAR (XBUFFER (tem
), name
)));
3490 w
->dedicated
= Qnil
;
3495 set_window_buffer (window
, buffer
, 1, !NILP (keep_margins
));
3499 /* If select_window is called with inhibit_point_swap non-zero it will
3500 not store point of the old selected window's buffer back into that
3501 window's pointm slot. This is needed by Fset_window_configuration to
3502 avoid that the display routine is called with selected_window set to
3503 Qnil causing a subsequent crash. */
3506 select_window (Lisp_Object window
, Lisp_Object norecord
, int inhibit_point_swap
)
3508 register struct window
*w
;
3509 register struct window
*ow
;
3512 CHECK_LIVE_WINDOW (window
);
3514 w
= XWINDOW (window
);
3515 w
->frozen_window_start_p
= 0;
3517 if (NILP (norecord
))
3519 ++window_select_count
;
3520 XSETFASTINT (w
->use_time
, window_select_count
);
3521 record_buffer (w
->buffer
);
3524 if (EQ (window
, selected_window
) && !inhibit_point_swap
)
3527 sf
= SELECTED_FRAME ();
3528 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
3530 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
3531 /* Use this rather than Fhandle_switch_frame
3532 so that FRAME_FOCUS_FRAME is moved appropriately as we
3533 move around in the state where a minibuffer in a separate
3535 Fselect_frame (WINDOW_FRAME (w
), norecord
);
3536 /* Fselect_frame called us back so we've done all the work already. */
3537 eassert (EQ (window
, selected_window
));
3541 sf
->selected_window
= window
;
3543 /* Store the current buffer's actual point into the
3544 old selected window. It belongs to that window,
3545 and when the window is not selected, must be in the window. */
3546 if (!inhibit_point_swap
)
3548 ow
= XWINDOW (selected_window
);
3549 if (! NILP (ow
->buffer
))
3550 set_marker_both (ow
->pointm
, ow
->buffer
,
3551 BUF_PT (XBUFFER (ow
->buffer
)),
3552 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
3555 selected_window
= window
;
3557 Fset_buffer (w
->buffer
);
3559 BVAR (XBUFFER (w
->buffer
), last_selected_window
) = window
;
3561 /* Go to the point recorded in the window.
3562 This is important when the buffer is in more
3563 than one window. It also matters when
3564 redisplay_window has altered point after scrolling,
3565 because it makes the change only in the window. */
3567 register EMACS_INT new_point
= marker_position (w
->pointm
);
3568 if (new_point
< BEGV
)
3570 else if (new_point
> ZV
)
3576 windows_or_buffers_changed
++;
3581 /* Note that selected_window can be nil when this is called from
3582 Fset_window_configuration. */
3584 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 2, 0,
3585 doc
: /* Select WINDOW. Most editing will apply to WINDOW's buffer.
3586 If WINDOW is not already selected, make WINDOW's buffer current
3587 and make WINDOW the frame's selected window. Return WINDOW.
3588 Optional second arg NORECORD non-nil means do not put this buffer
3589 at the front of the list of recently selected ones and do not
3590 make this window the most recently selected one.
3592 Note that the main editor command loop selects the buffer of the
3593 selected window before each command. */)
3594 (register Lisp_Object window
, Lisp_Object norecord
)
3596 return select_window (window
, norecord
, 0);
3600 select_window_norecord (Lisp_Object window
)
3602 return WINDOW_LIVE_P (window
)
3603 ? Fselect_window (window
, Qt
) : selected_window
;
3607 select_frame_norecord (Lisp_Object frame
)
3609 return FRAME_LIVE_P (XFRAME (frame
))
3610 ? Fselect_frame (frame
, Qt
) : selected_frame
;
3614 display_buffer (Lisp_Object buffer
, Lisp_Object not_this_window_p
, Lisp_Object override_frame
)
3616 return call3 (Qdisplay_buffer
, buffer
, not_this_window_p
, override_frame
);
3619 DEFUN ("force-window-update", Fforce_window_update
, Sforce_window_update
,
3621 doc
: /* Force all windows to be updated on next redisplay.
3622 If optional arg OBJECT is a window, force redisplay of that window only.
3623 If OBJECT is a buffer or buffer name, force redisplay of all windows
3624 displaying that buffer. */)
3625 (Lisp_Object object
)
3629 windows_or_buffers_changed
++;
3630 update_mode_lines
++;
3634 if (WINDOWP (object
))
3636 struct window
*w
= XWINDOW (object
);
3637 mark_window_display_accurate (object
, 0);
3638 w
->update_mode_line
= Qt
;
3639 if (BUFFERP (w
->buffer
))
3640 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
3641 ++update_mode_lines
;
3645 if (STRINGP (object
))
3646 object
= Fget_buffer (object
);
3647 if (BUFFERP (object
) && !NILP (BVAR (XBUFFER (object
), name
)))
3649 /* Walk all windows looking for buffer, and force update
3650 of each of those windows. */
3652 object
= window_loop (REDISPLAY_BUFFER_WINDOWS
, object
, 0, Qvisible
);
3653 return NILP (object
) ? Qnil
: Qt
;
3656 /* If nothing suitable was found, just return.
3657 We could signal an error, but this feature will typically be used
3658 asynchronously in timers or process sentinels, so we don't. */
3664 temp_output_buffer_show (register Lisp_Object buf
)
3666 register struct buffer
*old
= current_buffer
;
3667 register Lisp_Object window
;
3668 register struct window
*w
;
3670 BVAR (XBUFFER (buf
), directory
) = BVAR (current_buffer
, directory
);
3673 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3677 set_buffer_internal (old
);
3679 if (!NILP (Vtemp_buffer_show_function
))
3680 call1 (Vtemp_buffer_show_function
, buf
);
3683 window
= display_buffer (buf
, Qnil
, Qnil
);
3685 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3686 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3687 Vminibuf_scroll_window
= window
;
3688 w
= XWINDOW (window
);
3689 XSETFASTINT (w
->hscroll
, 0);
3690 XSETFASTINT (w
->min_hscroll
, 0);
3691 set_marker_restricted_both (w
->start
, buf
, BEG
, BEG
);
3692 set_marker_restricted_both (w
->pointm
, buf
, BEG
, BEG
);
3694 /* Run temp-buffer-show-hook, with the chosen window selected
3695 and its buffer current. */
3697 int count
= SPECPDL_INDEX ();
3698 Lisp_Object prev_window
, prev_buffer
;
3699 prev_window
= selected_window
;
3700 XSETBUFFER (prev_buffer
, old
);
3702 /* Select the window that was chosen, for running the hook.
3703 Note: Both Fselect_window and select_window_norecord may
3704 set-buffer to the buffer displayed in the window,
3705 so we need to save the current buffer. --stef */
3706 record_unwind_protect (Fset_buffer
, prev_buffer
);
3707 record_unwind_protect (select_window_norecord
, prev_window
);
3708 Fselect_window (window
, Qt
);
3709 Fset_buffer (w
->buffer
);
3710 Frun_hooks (1, &Qtemp_buffer_show_hook
);
3711 unbind_to (count
, Qnil
);
3716 DEFUN ("internal-temp-output-buffer-show",
3717 Ftemp_output_buffer_show
, Stemp_output_buffer_show
,
3719 doc
: /* Internal function for `with-output-to-temp-buffer''. */)
3722 temp_output_buffer_show (buf
);
3727 make_dummy_parent (Lisp_Object window
)
3730 register struct window
*o
, *p
;
3733 o
= XWINDOW (window
);
3734 p
= allocate_window ();
3735 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3736 ((struct Lisp_Vector
*) p
)->contents
[i
]
3737 = ((struct Lisp_Vector
*)o
)->contents
[i
];
3738 XSETWINDOW (new, p
);
3741 XSETFASTINT (p
->sequence_number
, sequence_number
);
3743 /* Put new into window structure in place of window */
3744 replace_window (window
, new);
3757 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3758 doc
: /* Split WINDOW, putting SIZE lines in the first of the pair.
3759 WINDOW defaults to selected one and SIZE to half its size.
3760 If optional third arg HORIZONTAL is non-nil, split side by side and put
3761 SIZE columns in the first of the pair. In that case, SIZE includes that
3762 window's scroll bar, or the divider column to its right.
3763 Interactively, all arguments are nil.
3764 Returns the newly created window (which is the lower or rightmost one).
3765 The upper or leftmost window is the original one, and remains selected
3766 if it was selected before.
3768 See Info node `(elisp)Splitting Windows' for more details and examples. */)
3769 (Lisp_Object window
, Lisp_Object size
, Lisp_Object horizontal
)
3771 register Lisp_Object
new;
3772 register struct window
*o
, *p
;
3774 register int size_int
;
3777 window
= selected_window
;
3779 CHECK_LIVE_WINDOW (window
);
3781 o
= XWINDOW (window
);
3782 fo
= XFRAME (WINDOW_FRAME (o
));
3786 if (!NILP (horizontal
))
3787 /* Calculate the size of the left-hand window, by dividing
3788 the usable space in columns by two.
3789 We round up, since the left-hand window may include
3790 a dividing line, while the right-hand may not. */
3791 size_int
= (XFASTINT (o
->total_cols
) + 1) >> 1;
3793 size_int
= XFASTINT (o
->total_lines
) >> 1;
3797 CHECK_NUMBER (size
);
3798 size_int
= XINT (size
);
3801 if (MINI_WINDOW_P (o
))
3802 error ("Attempt to split minibuffer window");
3803 else if (window_fixed_size_p (o
, !NILP (horizontal
), 0))
3804 error ("Attempt to split fixed-size window");
3806 if (NILP (horizontal
))
3808 int window_safe_height
= window_min_size_2 (o
, 0, 0);
3810 if (size_int
< window_safe_height
)
3811 error ("Window height %d too small (after splitting)", size_int
);
3812 if (size_int
+ window_safe_height
> XFASTINT (o
->total_lines
))
3813 error ("Window height %d too small (after splitting)",
3814 (int) (XFASTINT (o
->total_lines
) - size_int
));
3815 if (NILP (o
->parent
)
3816 || NILP (XWINDOW (o
->parent
)->vchild
))
3818 make_dummy_parent (window
);
3820 XWINDOW (new)->vchild
= window
;
3825 int window_safe_width
= window_min_size_2 (o
, 1, 0);
3827 if (size_int
< window_safe_width
)
3828 error ("Window width %d too small (after splitting)", size_int
);
3829 if (size_int
+ window_safe_width
> XFASTINT (o
->total_cols
))
3830 error ("Window width %d too small (after splitting)",
3831 (int) (XFASTINT (o
->total_cols
) - size_int
));
3832 if (NILP (o
->parent
)
3833 || NILP (XWINDOW (o
->parent
)->hchild
))
3835 make_dummy_parent (window
);
3837 XWINDOW (new)->hchild
= window
;
3841 /* Now we know that window's parent is a vertical combination
3842 if we are dividing vertically, or a horizontal combination
3843 if we are making side-by-side windows */
3845 windows_or_buffers_changed
++;
3846 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3847 new = make_window ();
3850 p
->frame
= o
->frame
;
3852 if (!NILP (p
->next
))
3853 XWINDOW (p
->next
)->prev
= new;
3856 p
->parent
= o
->parent
;
3858 p
->window_end_valid
= Qnil
;
3859 memset (&p
->last_cursor
, 0, sizeof p
->last_cursor
);
3861 /* Duplicate special geometry settings. */
3863 p
->left_margin_cols
= o
->left_margin_cols
;
3864 p
->right_margin_cols
= o
->right_margin_cols
;
3865 p
->left_fringe_width
= o
->left_fringe_width
;
3866 p
->right_fringe_width
= o
->right_fringe_width
;
3867 p
->fringes_outside_margins
= o
->fringes_outside_margins
;
3868 p
->scroll_bar_width
= o
->scroll_bar_width
;
3869 p
->vertical_scroll_bar_type
= o
->vertical_scroll_bar_type
;
3871 /* Apportion the available frame space among the two new windows */
3873 if (!NILP (horizontal
))
3875 p
->total_lines
= o
->total_lines
;
3876 p
->top_line
= o
->top_line
;
3877 XSETFASTINT (p
->total_cols
, XFASTINT (o
->total_cols
) - size_int
);
3878 XSETFASTINT (o
->total_cols
, size_int
);
3879 XSETFASTINT (p
->left_col
, XFASTINT (o
->left_col
) + size_int
);
3880 adjust_window_margins (p
);
3881 adjust_window_margins (o
);
3885 p
->left_col
= o
->left_col
;
3886 p
->total_cols
= o
->total_cols
;
3887 XSETFASTINT (p
->total_lines
, XFASTINT (o
->total_lines
) - size_int
);
3888 XSETFASTINT (o
->total_lines
, size_int
);
3889 XSETFASTINT (p
->top_line
, XFASTINT (o
->top_line
) + size_int
);
3892 /* Adjust glyph matrices. */
3895 Fset_window_buffer (new, o
->buffer
, Qt
);
3899 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
3900 doc
: /* Make selected window SIZE lines taller.
3901 Interactively, if no argument is given, make the selected window one
3902 line taller. If optional argument HORIZONTAL is non-nil, make selected
3903 window wider by SIZE columns. If SIZE is negative, shrink the window by
3904 -SIZE lines or columns. Return nil.
3906 This function can delete windows if they get too small. The size of
3907 fixed size windows is not altered by this function. */)
3908 (Lisp_Object size
, Lisp_Object horizontal
)
3910 CHECK_NUMBER (size
);
3911 enlarge_window (selected_window
, XINT (size
), !NILP (horizontal
));
3913 run_window_configuration_change_hook (SELECTED_FRAME ());
3918 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
3919 doc
: /* Make selected window SIZE lines smaller.
3920 Interactively, if no argument is given, make the selected window one
3921 line smaller. If optional argument HORIZONTAL is non-nil, make the
3922 window narrower by SIZE columns. If SIZE is negative, enlarge selected
3923 window by -SIZE lines or columns. Return nil.
3925 This function can delete windows if they get too small. The size of
3926 fixed size windows is not altered by this function. */)
3927 (Lisp_Object size
, Lisp_Object horizontal
)
3929 CHECK_NUMBER (size
);
3930 enlarge_window (selected_window
, -XINT (size
), !NILP (horizontal
));
3932 run_window_configuration_change_hook (SELECTED_FRAME ());
3938 window_height (Lisp_Object window
)
3940 register struct window
*p
= XWINDOW (window
);
3941 return WINDOW_TOTAL_LINES (p
);
3945 window_width (Lisp_Object window
)
3947 register struct window
*p
= XWINDOW (window
);
3948 return WINDOW_TOTAL_COLS (p
);
3953 *(horiz_flag ? &(XWINDOW (w)->left_col) : &(XWINDOW (w)->top_line))
3955 #define CURSIZE(w) \
3956 *(horiz_flag ? &(XWINDOW (w)->total_cols) : &(XWINDOW (w)->total_lines))
3959 /* Enlarge WINDOW by DELTA. HORIZ_FLAG nonzero means enlarge it
3960 horizontally; zero means do it vertically.
3962 Siblings of the selected window are resized to fulfill the size
3963 request. If they become too small in the process, they may be
3967 enlarge_window (Lisp_Object window
, int delta
, int horiz_flag
)
3969 Lisp_Object parent
, next
, prev
;
3973 int (*sizefun
) (Lisp_Object
)
3974 = horiz_flag
? window_width
: window_height
;
3975 void (*setsizefun
) (Lisp_Object
, int, int)
3976 = (horiz_flag
? set_window_width
: set_window_height
);
3978 /* Give up if this window cannot be resized. */
3979 if (window_fixed_size_p (XWINDOW (window
), horiz_flag
, 1))
3980 error ("Window is not resizable");
3982 /* Find the parent of the selected window. */
3985 p
= XWINDOW (window
);
3991 error ("No other window to side of this one");
3996 ? !NILP (XWINDOW (parent
)->hchild
)
3997 : !NILP (XWINDOW (parent
)->vchild
))
4003 sizep
= &CURSIZE (window
);
4006 register int maxdelta
;
4008 /* Compute the maximum size increment this window can have. */
4010 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
4011 /* This is a main window followed by a minibuffer. */
4012 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
4013 - window_min_size (XWINDOW (p
->next
),
4014 horiz_flag
, 0, 0, 0))
4015 /* This is a minibuffer following a main window. */
4016 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
4017 - window_min_size (XWINDOW (p
->prev
),
4018 horiz_flag
, 0, 0, 0))
4019 /* This is a frame with only one window, a minibuffer-only
4020 or a minibufferless frame. */
4023 if (delta
> maxdelta
)
4024 /* This case traps trying to make the minibuffer
4025 the full frame, or make the only window aside from the
4026 minibuffer the full frame. */
4030 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
),
4031 horiz_flag
, 0, 0, 0))
4033 delete_window (window
);
4040 /* Find the total we can get from other siblings without deleting them. */
4042 for (next
= p
->next
; WINDOWP (next
); next
= XWINDOW (next
)->next
)
4043 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
4044 horiz_flag
, 0, 0, 0);
4045 for (prev
= p
->prev
; WINDOWP (prev
); prev
= XWINDOW (prev
)->prev
)
4046 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
4047 horiz_flag
, 0, 0, 0);
4049 /* If we can get it all from them without deleting them, do so. */
4050 if (delta
<= maximum
)
4052 Lisp_Object first_unaffected
;
4053 Lisp_Object first_affected
;
4058 first_affected
= window
;
4059 /* Look at one sibling at a time,
4060 moving away from this window in both directions alternately,
4061 and take as much as we can get without deleting that sibling. */
4063 && (!NILP (next
) || !NILP (prev
)))
4067 int this_one
= ((*sizefun
) (next
)
4068 - window_min_size (XWINDOW (next
), horiz_flag
,
4072 if (this_one
> delta
)
4075 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
4076 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4081 next
= XWINDOW (next
)->next
;
4089 int this_one
= ((*sizefun
) (prev
)
4090 - window_min_size (XWINDOW (prev
), horiz_flag
,
4094 if (this_one
> delta
)
4097 first_affected
= prev
;
4099 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
4100 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
4105 prev
= XWINDOW (prev
)->prev
;
4109 xassert (delta
== 0);
4111 /* Now recalculate the edge positions of all the windows affected,
4112 based on the new sizes. */
4113 first_unaffected
= next
;
4114 prev
= first_affected
;
4115 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
4116 prev
= next
, next
= XWINDOW (next
)->next
)
4118 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
4119 /* This does not change size of NEXT,
4120 but it propagates the new top edge to its children */
4121 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
4126 register int delta1
;
4127 register int opht
= (*sizefun
) (parent
);
4129 if (opht
<= XINT (*sizep
) + delta
)
4131 /* If trying to grow this window to or beyond size of the parent,
4132 just delete all the sibling windows. */
4133 Lisp_Object start
, tem
;
4135 start
= XWINDOW (parent
)->vchild
;
4137 start
= XWINDOW (parent
)->hchild
;
4139 /* Delete any siblings that come after WINDOW. */
4140 tem
= XWINDOW (window
)->next
;
4141 while (! NILP (tem
))
4143 Lisp_Object next1
= XWINDOW (tem
)->next
;
4144 delete_window (tem
);
4148 /* Delete any siblings that come after WINDOW.
4149 Note that if START is not WINDOW, then WINDOW still
4150 has siblings, so WINDOW has not yet replaced its parent. */
4152 while (! EQ (tem
, window
))
4154 Lisp_Object next1
= XWINDOW (tem
)->next
;
4155 delete_window (tem
);
4161 /* Otherwise, make delta1 just right so that if we add
4162 delta1 lines to this window and to the parent, and then
4163 shrink the parent back to its original size, the new
4164 proportional size of this window will increase by delta.
4166 The function size_window will compute the new height h'
4167 of the window from delta1 as:
4170 x = delta1 - delta1/n * n for the 1st resizable child
4173 where n is the number of children that can be resized.
4174 We can ignore x by choosing a delta1 that is a multiple of
4175 n. We want the height of this window to come out as
4185 The number of children n equals the number of resizable
4186 children of this window + 1 because we know window itself
4187 is resizable (otherwise we would have signaled an error).
4189 This reasoning is not correct when other windows become too
4190 small and shrink_windows refuses to delete them. Below we
4191 use resize_proportionally to work around this problem. */
4193 struct window
*w
= XWINDOW (window
);
4197 for (s
= w
->next
; WINDOWP (s
); s
= XWINDOW (s
)->next
)
4198 if (!window_fixed_size_p (XWINDOW (s
), horiz_flag
, 0))
4200 for (s
= w
->prev
; WINDOWP (s
); s
= XWINDOW (s
)->prev
)
4201 if (!window_fixed_size_p (XWINDOW (s
), horiz_flag
, 0))
4206 /* Add delta1 lines or columns to this window, and to the parent,
4207 keeping things consistent while not affecting siblings. */
4208 XSETINT (CURSIZE (parent
), opht
+ delta1
);
4209 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
4211 /* Squeeze out delta1 lines or columns from our parent,
4212 shrinking this window and siblings proportionately. This
4213 brings parent back to correct size. Delta1 was calculated
4214 so this makes this window the desired size, taking it all
4215 out of the siblings.
4217 Temporarily set resize_proportionally to Qt to assure that,
4218 if necessary, shrink_windows deletes smaller windows rather
4219 than shrink this window. */
4220 w
->resize_proportionally
= Qt
;
4221 (*setsizefun
) (parent
, opht
, 0);
4222 w
->resize_proportionally
= Qnil
;
4226 XSETFASTINT (p
->last_modified
, 0);
4227 XSETFASTINT (p
->last_overlay_modified
, 0);
4229 /* Adjust glyph matrices. */
4230 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4234 /* Adjust the size of WINDOW by DELTA, moving only its trailing edge.
4235 HORIZ_FLAG nonzero means adjust the width, moving the right edge.
4236 zero means adjust the height, moving the bottom edge.
4238 Following siblings of the selected window are resized to fulfill
4239 the size request. If they become too small in the process, they
4240 are not deleted; instead, we signal an error. */
4243 adjust_window_trailing_edge (Lisp_Object window
, int delta
, int horiz_flag
)
4245 Lisp_Object parent
, child
;
4247 Lisp_Object old_config
= Fcurrent_window_configuration (Qnil
);
4248 int delcount
= window_deletion_count
;
4250 CHECK_WINDOW (window
);
4252 /* Give up if this window cannot be resized. */
4253 if (window_fixed_size_p (XWINDOW (window
), horiz_flag
, 1))
4254 error ("Window is not resizable");
4258 Lisp_Object first_parallel
= Qnil
;
4262 /* This happens if WINDOW on the previous iteration was
4263 at top level of the window tree. */
4264 Fset_window_configuration (old_config
);
4265 error ("Specified window edge is fixed");
4268 p
= XWINDOW (window
);
4271 /* See if this level has windows in parallel in the specified
4272 direction. If so, set FIRST_PARALLEL to the first one. */
4275 if (! NILP (parent
) && !NILP (XWINDOW (parent
)->vchild
))
4276 first_parallel
= XWINDOW (parent
)->vchild
;
4277 else if (NILP (parent
) && !NILP (p
->next
))
4279 /* Handle the vertical chain of main window and minibuffer
4280 which has no parent. */
4281 first_parallel
= window
;
4282 while (! NILP (XWINDOW (first_parallel
)->prev
))
4283 first_parallel
= XWINDOW (first_parallel
)->prev
;
4288 if (! NILP (parent
) && !NILP (XWINDOW (parent
)->hchild
))
4289 first_parallel
= XWINDOW (parent
)->hchild
;
4292 /* If this level's succession is in the desired dimension,
4293 and this window is the last one, and there is no higher level,
4294 its trailing edge is fixed. */
4295 if (NILP (XWINDOW (window
)->next
) && NILP (first_parallel
)
4298 Fset_window_configuration (old_config
);
4299 error ("Specified window edge is fixed");
4302 /* Don't make this window too small. */
4303 if (XINT (CURSIZE (window
)) + delta
4304 < window_min_size_2 (XWINDOW (window
), horiz_flag
, 0))
4306 Fset_window_configuration (old_config
);
4307 error ("Cannot adjust window size as specified");
4310 /* Clear out some redisplay caches. */
4311 XSETFASTINT (p
->last_modified
, 0);
4312 XSETFASTINT (p
->last_overlay_modified
, 0);
4314 /* Adjust this window's edge. */
4315 XSETINT (CURSIZE (window
),
4316 XINT (CURSIZE (window
)) + delta
);
4318 /* If this window has following siblings in the desired dimension,
4319 make them smaller, and exit the loop.
4321 (If we reach the top of the tree and can never do this,
4322 we will fail and report an error, above.) */
4323 if (NILP (first_parallel
))
4325 if (!NILP (p
->next
))
4327 /* This may happen for the minibuffer. In that case
4328 the window_deletion_count check below does not work. */
4329 if (XINT (CURSIZE (p
->next
)) - delta
<= 0)
4331 Fset_window_configuration (old_config
);
4332 error ("Cannot adjust window size as specified");
4335 XSETINT (CURBEG (p
->next
),
4336 XINT (CURBEG (p
->next
)) + delta
);
4337 size_window (p
->next
, XINT (CURSIZE (p
->next
)) - delta
,
4338 horiz_flag
, 0, 1, 0);
4343 /* Here we have a chain of parallel siblings, in the other dimension.
4344 Change the size of the other siblings. */
4345 for (child
= first_parallel
;
4347 child
= XWINDOW (child
)->next
)
4348 if (! EQ (child
, window
))
4349 size_window (child
, XINT (CURSIZE (child
)) + delta
,
4350 horiz_flag
, 0, 0, 1);
4355 /* If we made a window so small it got deleted,
4356 we failed. Report failure. */
4357 if (delcount
!= window_deletion_count
)
4359 Fset_window_configuration (old_config
);
4360 error ("Cannot adjust window size as specified");
4363 /* Adjust glyph matrices. */
4364 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4370 DEFUN ("adjust-window-trailing-edge", Fadjust_window_trailing_edge
,
4371 Sadjust_window_trailing_edge
, 3, 3, 0,
4372 doc
: /* Adjust the bottom or right edge of WINDOW by DELTA.
4373 If HORIZONTAL is non-nil, that means adjust the width, moving the right edge.
4374 Otherwise, adjust the height, moving the bottom edge.
4376 Following siblings of the selected window are resized to fulfill
4377 the size request. If they become too small in the process, they
4378 are not deleted; instead, we signal an error. */)
4379 (Lisp_Object window
, Lisp_Object delta
, Lisp_Object horizontal
)
4381 CHECK_NUMBER (delta
);
4383 window
= selected_window
;
4384 adjust_window_trailing_edge (window
, XINT (delta
), !NILP (horizontal
));
4386 run_window_configuration_change_hook
4387 (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
4394 /***********************************************************************
4395 Resizing Mini-Windows
4396 ***********************************************************************/
4398 static void shrink_window_lowest_first (struct window
*, int);
4400 enum save_restore_action
4407 static int save_restore_orig_size (struct window
*,
4408 enum save_restore_action
);
4410 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
4411 from lowest windows first. */
4414 shrink_window_lowest_first (struct window
*w
, int height
)
4420 xassert (!MINI_WINDOW_P (w
));
4422 /* Set redisplay hints. */
4423 XSETFASTINT (w
->last_modified
, 0);
4424 XSETFASTINT (w
->last_overlay_modified
, 0);
4425 windows_or_buffers_changed
++;
4426 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
4428 old_height
= XFASTINT (w
->total_lines
);
4429 XSETFASTINT (w
->total_lines
, height
);
4431 if (!NILP (w
->hchild
))
4433 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
4435 c
= XWINDOW (child
);
4436 c
->top_line
= w
->top_line
;
4437 shrink_window_lowest_first (c
, height
);
4440 else if (!NILP (w
->vchild
))
4442 Lisp_Object last_child
;
4443 int delta
= old_height
- height
;
4448 /* Find the last child. We are taking space from lowest windows
4449 first, so we iterate over children from the last child
4451 for (child
= w
->vchild
; WINDOWP (child
); child
= XWINDOW (child
)->next
)
4454 /* Size children down to their safe heights. */
4455 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
4459 c
= XWINDOW (child
);
4460 this_one
= XFASTINT (c
->total_lines
) - window_min_size_1 (c
, 0, 1);
4462 if (this_one
> delta
)
4465 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
) - this_one
);
4469 /* Compute new positions. */
4470 last_top
= XINT (w
->top_line
);
4471 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
4473 c
= XWINDOW (child
);
4474 c
->top_line
= make_number (last_top
);
4475 shrink_window_lowest_first (c
, XFASTINT (c
->total_lines
));
4476 last_top
+= XFASTINT (c
->total_lines
);
4482 /* Save, restore, or check positions and sizes in the window tree
4483 rooted at W. ACTION says what to do.
4485 If ACTION is CHECK_ORIG_SIZES, check if orig_top_line and
4486 orig_total_lines members are valid for all windows in the window
4487 tree. Value is non-zero if they are valid.
4489 If ACTION is SAVE_ORIG_SIZES, save members top and height in
4490 orig_top_line and orig_total_lines for all windows in the tree.
4492 If ACTION is RESTORE_ORIG_SIZES, restore top and height from values
4493 stored in orig_top_line and orig_total_lines for all windows. */
4496 save_restore_orig_size (struct window
*w
, enum save_restore_action action
)
4502 if (!NILP (w
->hchild
))
4504 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
4507 else if (!NILP (w
->vchild
))
4509 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
4515 case CHECK_ORIG_SIZES
:
4516 if (!INTEGERP (w
->orig_top_line
) || !INTEGERP (w
->orig_total_lines
))
4520 case SAVE_ORIG_SIZES
:
4521 w
->orig_top_line
= w
->top_line
;
4522 w
->orig_total_lines
= w
->total_lines
;
4523 XSETFASTINT (w
->last_modified
, 0);
4524 XSETFASTINT (w
->last_overlay_modified
, 0);
4527 case RESTORE_ORIG_SIZES
:
4528 xassert (INTEGERP (w
->orig_top_line
) && INTEGERP (w
->orig_total_lines
));
4529 w
->top_line
= w
->orig_top_line
;
4530 w
->total_lines
= w
->orig_total_lines
;
4531 w
->orig_total_lines
= w
->orig_top_line
= Qnil
;
4532 XSETFASTINT (w
->last_modified
, 0);
4533 XSETFASTINT (w
->last_overlay_modified
, 0);
4540 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
4547 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
4548 without deleting other windows. */
4551 grow_mini_window (struct window
*w
, int delta
)
4553 struct frame
*f
= XFRAME (w
->frame
);
4554 struct window
*root
;
4556 xassert (MINI_WINDOW_P (w
));
4557 /* Commenting out the following assertion goes against the stated interface
4558 of the function, but it currently does not seem to do anything useful.
4559 See discussion of this issue in the thread for bug#4534.
4560 xassert (delta >= 0); */
4562 /* Compute how much we can enlarge the mini-window without deleting
4564 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4567 int min_height
= window_min_size (root
, 0, 0, 0, 0);
4568 if (XFASTINT (root
->total_lines
) - delta
< min_height
)
4569 /* Note that the root window may already be smaller than
4571 delta
= max (0, XFASTINT (root
->total_lines
) - min_height
);
4576 /* Save original window sizes and positions, if not already done. */
4577 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4578 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
4580 /* Shrink other windows. */
4581 shrink_window_lowest_first (root
, XFASTINT (root
->total_lines
) - delta
);
4583 /* Grow the mini-window. */
4584 w
->top_line
= make_number (XFASTINT (root
->top_line
) + XFASTINT (root
->total_lines
));
4585 w
->total_lines
= make_number (XFASTINT (w
->total_lines
) + delta
);
4586 XSETFASTINT (w
->last_modified
, 0);
4587 XSETFASTINT (w
->last_overlay_modified
, 0);
4594 /* Shrink mini-window W. If there is recorded info about window sizes
4595 before a call to grow_mini_window, restore recorded window sizes.
4596 Otherwise, if the mini-window is higher than 1 line, resize it to 1
4600 shrink_mini_window (struct window
*w
)
4602 struct frame
*f
= XFRAME (w
->frame
);
4603 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4605 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
4607 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
4609 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4610 windows_or_buffers_changed
= 1;
4612 else if (XFASTINT (w
->total_lines
) > 1)
4614 /* Distribute the additional lines of the mini-window
4615 among the other windows. */
4617 XSETWINDOW (window
, w
);
4618 enlarge_window (window
, 1 - XFASTINT (w
->total_lines
), 0);
4624 /* Mark window cursors off for all windows in the window tree rooted
4625 at W by setting their phys_cursor_on_p flag to zero. Called from
4626 xterm.c, e.g. when a frame is cleared and thereby all cursors on
4627 the frame are cleared. */
4630 mark_window_cursors_off (struct window
*w
)
4634 if (!NILP (w
->hchild
))
4635 mark_window_cursors_off (XWINDOW (w
->hchild
));
4636 else if (!NILP (w
->vchild
))
4637 mark_window_cursors_off (XWINDOW (w
->vchild
));
4639 w
->phys_cursor_on_p
= 0;
4641 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4646 /* Return number of lines of text (not counting mode lines) in W. */
4649 window_internal_height (struct window
*w
)
4651 int ht
= XFASTINT (w
->total_lines
);
4653 if (!MINI_WINDOW_P (w
))
4655 if (!NILP (w
->parent
)
4656 || !NILP (w
->vchild
)
4657 || !NILP (w
->hchild
)
4660 || WINDOW_WANTS_MODELINE_P (w
))
4663 if (WINDOW_WANTS_HEADER_LINE_P (w
))
4671 /* Return the number of columns in W.
4672 Don't count columns occupied by scroll bars or the vertical bar
4673 separating W from the sibling to its right. */
4676 window_box_text_cols (struct window
*w
)
4678 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4679 int width
= XINT (w
->total_cols
);
4681 if (WINDOW_HAS_VERTICAL_SCROLL_BAR (w
))
4682 /* Scroll bars occupy a few columns. */
4683 width
-= WINDOW_CONFIG_SCROLL_BAR_COLS (w
);
4684 else if (!FRAME_WINDOW_P (f
)
4685 && !WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
4686 /* The column of `|' characters separating side-by-side windows
4687 occupies one column only. */
4690 if (FRAME_WINDOW_P (f
))
4691 /* On window-systems, fringes and display margins cannot be
4692 used for normal text. */
4693 width
-= (WINDOW_FRINGE_COLS (w
)
4694 + WINDOW_LEFT_MARGIN_COLS (w
)
4695 + WINDOW_RIGHT_MARGIN_COLS (w
));
4701 /************************************************************************
4703 ***********************************************************************/
4705 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
4706 N screen-fulls, which is defined as the height of the window minus
4707 next_screen_context_lines. If WHOLE is zero, scroll up N lines
4708 instead. Negative values of N mean scroll down. NOERROR non-zero
4709 means don't signal an error if we try to move over BEGV or ZV,
4713 window_scroll (Lisp_Object window
, int n
, int whole
, int noerror
)
4717 /* If we must, use the pixel-based version which is much slower than
4718 the line-based one but can handle varying line heights. */
4719 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
4720 window_scroll_pixel_based (window
, n
, whole
, noerror
);
4722 window_scroll_line_based (window
, n
, whole
, noerror
);
4728 /* Implementation of window_scroll that works based on pixel line
4729 heights. See the comment of window_scroll for parameter
4733 window_scroll_pixel_based (Lisp_Object window
, int n
, int whole
, int noerror
)
4736 struct window
*w
= XWINDOW (window
);
4737 struct text_pos start
;
4738 int this_scroll_margin
;
4739 /* True if we fiddled the window vscroll field without really scrolling. */
4741 int x
, y
, rtop
, rbot
, rowh
, vpos
;
4742 void *itdata
= NULL
;
4744 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4746 /* If PT is not visible in WINDOW, move back one half of
4747 the screen. Allow PT to be partially visible, otherwise
4748 something like (scroll-down 1) with PT in the line before
4749 the partially visible one would recenter. */
4751 if (!pos_visible_p (w
, PT
, &x
, &y
, &rtop
, &rbot
, &rowh
, &vpos
))
4753 itdata
= bidi_shelve_cache ();
4754 /* Move backward half the height of the window. Performance note:
4755 vmotion used here is about 10% faster, but would give wrong
4756 results for variable height lines. */
4757 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4758 it
.current_y
= it
.last_visible_y
;
4759 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
4761 /* The function move_iterator_vertically may move over more than
4762 the specified y-distance. If it->w is small, e.g. a
4763 mini-buffer window, we may end up in front of the window's
4764 display area. This is the case when Start displaying at the
4765 start of the line containing PT in this case. */
4766 if (it
.current_y
<= 0)
4768 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
4769 move_it_vertically_backward (&it
, 0);
4773 start
= it
.current
.pos
;
4774 bidi_unshelve_cache (itdata
, 0);
4776 else if (auto_window_vscroll_p
)
4778 if (rtop
|| rbot
) /* partially visible */
4781 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4783 dy
= max ((window_box_height (w
)
4784 - next_screen_context_lines
* dy
),
4790 /* Only vscroll backwards if already vscrolled forwards. */
4791 if (w
->vscroll
< 0 && rtop
> 0)
4793 px
= max (0, -w
->vscroll
- min (rtop
, -dy
));
4794 Fset_window_vscroll (window
, make_number (px
), Qt
);
4800 /* Do vscroll if already vscrolled or only display line. */
4801 if (rbot
> 0 && (w
->vscroll
< 0 || vpos
== 0))
4803 px
= max (0, -w
->vscroll
+ min (rbot
, dy
));
4804 Fset_window_vscroll (window
, make_number (px
), Qt
);
4808 /* Maybe modify window start instead of scrolling. */
4809 if (rbot
> 0 || w
->vscroll
< 0)
4813 Fset_window_vscroll (window
, make_number (0), Qt
);
4814 /* If there are other text lines above the current row,
4815 move window start to current row. Else to next row. */
4817 spos
= XINT (Fline_beginning_position (Qnil
));
4819 spos
= min (XINT (Fline_end_position (Qnil
)) + 1, ZV
);
4820 set_marker_restricted (w
->start
, make_number (spos
),
4822 w
->start_at_line_beg
= Qt
;
4823 w
->update_mode_line
= Qt
;
4824 XSETFASTINT (w
->last_modified
, 0);
4825 XSETFASTINT (w
->last_overlay_modified
, 0);
4826 /* Set force_start so that redisplay_window will run the
4827 window-scroll-functions. */
4828 w
->force_start
= Qt
;
4833 /* Cancel previous vscroll. */
4834 Fset_window_vscroll (window
, make_number (0), Qt
);
4837 itdata
= bidi_shelve_cache ();
4838 /* If scroll_preserve_screen_position is non-nil, we try to set
4839 point in the same window line as it is now, so get that line. */
4840 if (!NILP (Vscroll_preserve_screen_position
))
4842 /* We preserve the goal pixel coordinate across consecutive
4843 calls to scroll-up, scroll-down and other commands that
4844 have the `scroll-command' property. This avoids the
4845 possibility of point becoming "stuck" on a tall line when
4846 scrolling by one line. */
4847 if (window_scroll_pixel_based_preserve_y
< 0
4848 || !SYMBOLP (KVAR (current_kboard
, Vlast_command
))
4849 || NILP (Fget (KVAR (current_kboard
, Vlast_command
), Qscroll_command
)))
4851 start_display (&it
, w
, start
);
4852 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4853 window_scroll_pixel_based_preserve_y
= it
.current_y
;
4854 window_scroll_pixel_based_preserve_x
= it
.current_x
;
4858 window_scroll_pixel_based_preserve_y
4859 = window_scroll_pixel_based_preserve_x
= -1;
4861 /* Move iterator it from start the specified distance forward or
4862 backward. The result is the new window start. */
4863 start_display (&it
, w
, start
);
4866 EMACS_INT start_pos
= IT_CHARPOS (it
);
4867 int dy
= WINDOW_FRAME_LINE_HEIGHT (w
);
4868 dy
= max ((window_box_height (w
)
4869 - next_screen_context_lines
* dy
),
4872 /* Note that move_it_vertically always moves the iterator to the
4873 start of a line. So, if the last line doesn't have a newline,
4874 we would end up at the start of the line ending at ZV. */
4877 move_it_vertically_backward (&it
, -dy
);
4878 /* Ensure we actually do move, e.g. in case we are currently
4879 looking at an image that is taller that the window height. */
4880 while (start_pos
== IT_CHARPOS (it
)
4881 && start_pos
> BEGV
)
4882 move_it_by_lines (&it
, -1);
4886 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
4887 MOVE_TO_POS
| MOVE_TO_Y
);
4888 /* Ensure we actually do move, e.g. in case we are currently
4889 looking at an image that is taller that the window height. */
4890 while (start_pos
== IT_CHARPOS (it
)
4892 move_it_by_lines (&it
, 1);
4896 move_it_by_lines (&it
, n
);
4898 /* We failed if we find ZV is already on the screen (scrolling up,
4899 means there's nothing past the end), or if we can't start any
4900 earlier (scrolling down, means there's nothing past the top). */
4901 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
4902 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
4904 if (IT_CHARPOS (it
) == ZV
)
4906 if (it
.current_y
< it
.last_visible_y
4907 && (it
.current_y
+ it
.max_ascent
+ it
.max_descent
4908 > it
.last_visible_y
))
4910 /* The last line was only partially visible, make it fully
4912 w
->vscroll
= (it
.last_visible_y
4913 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4914 adjust_glyphs (it
.f
);
4918 bidi_unshelve_cache (itdata
, 0);
4921 else if (n
< 0) /* could happen with empty buffers */
4922 xsignal0 (Qbeginning_of_buffer
);
4924 xsignal0 (Qend_of_buffer
);
4929 if (w
->vscroll
!= 0)
4930 /* The first line was only partially visible, make it fully
4935 bidi_unshelve_cache (itdata
, 0);
4939 xsignal0 (Qbeginning_of_buffer
);
4943 /* If control gets here, then we vscrolled. */
4945 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4947 /* Don't try to change the window start below. */
4953 EMACS_INT pos
= IT_CHARPOS (it
);
4956 /* If in the middle of a multi-glyph character move forward to
4957 the next character. */
4958 if (in_display_vector_p (&it
))
4961 move_it_to (&it
, pos
, -1, -1, -1, MOVE_TO_POS
);
4964 /* Set the window start, and set up the window for redisplay. */
4965 set_marker_restricted (w
->start
, make_number (pos
),
4967 bytepos
= XMARKER (w
->start
)->bytepos
;
4968 w
->start_at_line_beg
= ((pos
== BEGV
|| FETCH_BYTE (bytepos
- 1) == '\n')
4970 w
->update_mode_line
= Qt
;
4971 XSETFASTINT (w
->last_modified
, 0);
4972 XSETFASTINT (w
->last_overlay_modified
, 0);
4973 /* Set force_start so that redisplay_window will run the
4974 window-scroll-functions. */
4975 w
->force_start
= Qt
;
4978 /* The rest of this function uses current_y in a nonstandard way,
4979 not including the height of the header line if any. */
4980 it
.current_y
= it
.vpos
= 0;
4982 /* Move PT out of scroll margins.
4983 This code wants current_y to be zero at the window start position
4984 even if there is a header line. */
4985 this_scroll_margin
= max (0, scroll_margin
);
4986 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->total_lines
) / 4);
4987 this_scroll_margin
*= FRAME_LINE_HEIGHT (it
.f
);
4991 /* We moved the window start towards ZV, so PT may be now
4992 in the scroll margin at the top. */
4993 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4994 if (IT_CHARPOS (it
) == PT
&& it
.current_y
>= this_scroll_margin
4995 && (NILP (Vscroll_preserve_screen_position
)
4996 || EQ (Vscroll_preserve_screen_position
, Qt
)))
4997 /* We found PT at a legitimate height. Leave it alone. */
4999 else if (window_scroll_pixel_based_preserve_y
>= 0)
5001 /* If we have a header line, take account of it.
5002 This is necessary because we set it.current_y to 0, above. */
5003 move_it_to (&it
, -1,
5004 window_scroll_pixel_based_preserve_x
,
5005 window_scroll_pixel_based_preserve_y
5006 - (WINDOW_WANTS_HEADER_LINE_P (w
) ? 1 : 0 ),
5007 -1, MOVE_TO_Y
| MOVE_TO_X
);
5008 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5012 while (it
.current_y
< this_scroll_margin
)
5014 int prev
= it
.current_y
;
5015 move_it_by_lines (&it
, 1);
5016 if (prev
== it
.current_y
)
5019 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5024 EMACS_INT charpos
, bytepos
;
5027 /* Save our position, for the
5028 window_scroll_pixel_based_preserve_y case. */
5029 charpos
= IT_CHARPOS (it
);
5030 bytepos
= IT_BYTEPOS (it
);
5032 /* We moved the window start towards BEGV, so PT may be now
5033 in the scroll margin at the bottom. */
5034 move_it_to (&it
, PT
, -1,
5035 (it
.last_visible_y
- CURRENT_HEADER_LINE_HEIGHT (w
)
5036 - this_scroll_margin
- 1),
5038 MOVE_TO_POS
| MOVE_TO_Y
);
5040 /* Save our position, in case it's correct. */
5041 charpos
= IT_CHARPOS (it
);
5042 bytepos
= IT_BYTEPOS (it
);
5044 /* See if point is on a partially visible line at the end. */
5045 if (it
.what
== IT_EOB
)
5046 partial_p
= it
.current_y
+ it
.ascent
+ it
.descent
> it
.last_visible_y
;
5049 move_it_by_lines (&it
, 1);
5050 partial_p
= it
.current_y
> it
.last_visible_y
;
5053 if (charpos
== PT
&& !partial_p
5054 && (NILP (Vscroll_preserve_screen_position
)
5055 || EQ (Vscroll_preserve_screen_position
, Qt
)))
5056 /* We found PT before we found the display margin, so PT is ok. */
5058 else if (window_scroll_pixel_based_preserve_y
>= 0)
5060 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5061 start_display (&it
, w
, start
);
5062 /* It would be wrong to subtract CURRENT_HEADER_LINE_HEIGHT
5063 here because we called start_display again and did not
5064 alter it.current_y this time. */
5065 move_it_to (&it
, -1, window_scroll_pixel_based_preserve_x
,
5066 window_scroll_pixel_based_preserve_y
, -1,
5067 MOVE_TO_Y
| MOVE_TO_X
);
5068 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5073 /* The last line was only partially visible, so back up two
5074 lines to make sure we're on a fully visible line. */
5076 move_it_by_lines (&it
, -2);
5077 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
5080 /* No, the position we saved is OK, so use it. */
5081 SET_PT_BOTH (charpos
, bytepos
);
5084 bidi_unshelve_cache (itdata
, 0);
5088 /* Implementation of window_scroll that works based on screen lines.
5089 See the comment of window_scroll for parameter descriptions. */
5092 window_scroll_line_based (Lisp_Object window
, int n
, int whole
, int noerror
)
5094 register struct window
*w
= XWINDOW (window
);
5095 /* Fvertical_motion enters redisplay, which can trigger
5096 fontification, which in turn can modify buffer text (e.g., if the
5097 fontification functions replace escape sequences with faces, as
5098 in `grep-mode-font-lock-keywords'). So we use a marker to record
5099 the old point position, to prevent crashes in SET_PT_BOTH. */
5100 Lisp_Object opoint_marker
= Fpoint_marker ();
5101 register EMACS_INT pos
, pos_byte
;
5102 register int ht
= window_internal_height (w
);
5103 register Lisp_Object tem
;
5107 Lisp_Object original_pos
= Qnil
;
5109 /* If scrolling screen-fulls, compute the number of lines to
5110 scroll from the window's height. */
5112 n
*= max (1, ht
- next_screen_context_lines
);
5114 startpos
= marker_position (w
->start
);
5116 if (!NILP (Vscroll_preserve_screen_position
))
5118 if (window_scroll_preserve_vpos
<= 0
5119 || !SYMBOLP (KVAR (current_kboard
, Vlast_command
))
5120 || NILP (Fget (KVAR (current_kboard
, Vlast_command
), Qscroll_command
)))
5122 struct position posit
5123 = *compute_motion (startpos
, 0, 0, 0,
5125 -1, XINT (w
->hscroll
),
5127 window_scroll_preserve_vpos
= posit
.vpos
;
5128 window_scroll_preserve_hpos
= posit
.hpos
+ XINT (w
->hscroll
);
5131 original_pos
= Fcons (make_number (window_scroll_preserve_hpos
),
5132 make_number (window_scroll_preserve_vpos
));
5135 XSETFASTINT (tem
, PT
);
5136 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
5140 Fvertical_motion (make_number (- (ht
/ 2)), window
);
5145 lose
= n
< 0 && PT
== BEGV
;
5146 Fvertical_motion (make_number (n
), window
);
5150 SET_PT_BOTH (marker_position (opoint_marker
),
5151 marker_byte_position (opoint_marker
));
5158 xsignal0 (Qbeginning_of_buffer
);
5163 int this_scroll_margin
= scroll_margin
;
5165 /* Don't use a scroll margin that is negative or too large. */
5166 if (this_scroll_margin
< 0)
5167 this_scroll_margin
= 0;
5169 if (XINT (w
->total_lines
) < 4 * scroll_margin
)
5170 this_scroll_margin
= XINT (w
->total_lines
) / 4;
5172 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
5173 w
->start_at_line_beg
= bolp
;
5174 w
->update_mode_line
= Qt
;
5175 XSETFASTINT (w
->last_modified
, 0);
5176 XSETFASTINT (w
->last_overlay_modified
, 0);
5177 /* Set force_start so that redisplay_window will run
5178 the window-scroll-functions. */
5179 w
->force_start
= Qt
;
5181 if (!NILP (Vscroll_preserve_screen_position
)
5182 && (whole
|| !EQ (Vscroll_preserve_screen_position
, Qt
)))
5184 SET_PT_BOTH (pos
, pos_byte
);
5185 Fvertical_motion (original_pos
, window
);
5187 /* If we scrolled forward, put point enough lines down
5188 that it is outside the scroll margin. */
5193 if (this_scroll_margin
> 0)
5195 SET_PT_BOTH (pos
, pos_byte
);
5196 Fvertical_motion (make_number (this_scroll_margin
), window
);
5202 if (top_margin
<= marker_position (opoint_marker
))
5203 SET_PT_BOTH (marker_position (opoint_marker
),
5204 marker_byte_position (opoint_marker
));
5205 else if (!NILP (Vscroll_preserve_screen_position
))
5207 SET_PT_BOTH (pos
, pos_byte
);
5208 Fvertical_motion (original_pos
, window
);
5211 SET_PT (top_margin
);
5217 /* If we scrolled backward, put point near the end of the window
5218 but not within the scroll margin. */
5219 SET_PT_BOTH (pos
, pos_byte
);
5220 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
5221 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
5224 bottom_margin
= PT
+ 1;
5226 if (bottom_margin
> marker_position (opoint_marker
))
5227 SET_PT_BOTH (marker_position (opoint_marker
),
5228 marker_byte_position (opoint_marker
));
5231 if (!NILP (Vscroll_preserve_screen_position
))
5233 SET_PT_BOTH (pos
, pos_byte
);
5234 Fvertical_motion (original_pos
, window
);
5237 Fvertical_motion (make_number (-1), window
);
5246 xsignal0 (Qend_of_buffer
);
5251 /* Scroll selected_window up or down. If N is nil, scroll a
5252 screen-full which is defined as the height of the window minus
5253 next_screen_context_lines. If N is the symbol `-', scroll.
5254 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
5255 up. This is the guts of Fscroll_up and Fscroll_down. */
5258 scroll_command (Lisp_Object n
, int direction
)
5260 int count
= SPECPDL_INDEX ();
5262 xassert (eabs (direction
) == 1);
5264 /* If selected window's buffer isn't current, make it current for
5265 the moment. But don't screw up if window_scroll gets an error. */
5266 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
5268 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5269 Fset_buffer (XWINDOW (selected_window
)->buffer
);
5271 /* Make redisplay consider other windows than just selected_window. */
5272 ++windows_or_buffers_changed
;
5276 window_scroll (selected_window
, direction
, 1, 0);
5277 else if (EQ (n
, Qminus
))
5278 window_scroll (selected_window
, -direction
, 1, 0);
5281 n
= Fprefix_numeric_value (n
);
5282 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
5285 unbind_to (count
, Qnil
);
5288 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "^P",
5289 doc
: /* Scroll text of selected window upward ARG lines.
5290 If ARG is omitted or nil, scroll upward by a near full screen.
5291 A near full screen is `next-screen-context-lines' less than a full screen.
5292 Negative ARG means scroll downward.
5293 If ARG is the atom `-', scroll downward by nearly full screen.
5294 When calling from a program, supply as argument a number, nil, or `-'. */)
5297 scroll_command (arg
, 1);
5301 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "^P",
5302 doc
: /* Scroll text of selected window down ARG lines.
5303 If ARG is omitted or nil, scroll down by a near full screen.
5304 A near full screen is `next-screen-context-lines' less than a full screen.
5305 Negative ARG means scroll upward.
5306 If ARG is the atom `-', scroll upward by nearly full screen.
5307 When calling from a program, supply as argument a number, nil, or `-'. */)
5310 scroll_command (arg
, -1);
5314 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
5315 doc
: /* Return the other window for \"other window scroll\" commands.
5316 If `other-window-scroll-buffer' is non-nil, a window
5317 showing that buffer is used.
5318 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5319 specifies the window. This takes precedence over
5320 `other-window-scroll-buffer'. */)
5325 if (MINI_WINDOW_P (XWINDOW (selected_window
))
5326 && !NILP (Vminibuf_scroll_window
))
5327 window
= Vminibuf_scroll_window
;
5328 /* If buffer is specified, scroll that buffer. */
5329 else if (!NILP (Vother_window_scroll_buffer
))
5331 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
5333 window
= display_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
5337 /* Nothing specified; look for a neighboring window on the same
5339 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
5341 if (EQ (window
, selected_window
))
5342 /* That didn't get us anywhere; look for a window on another
5345 window
= Fnext_window (window
, Qnil
, Qt
);
5346 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
5347 && ! EQ (window
, selected_window
));
5350 CHECK_LIVE_WINDOW (window
);
5352 if (EQ (window
, selected_window
))
5353 error ("There is no other window");
5358 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
5359 doc
: /* Scroll next window upward ARG lines; or near full screen if no ARG.
5360 A near full screen is `next-screen-context-lines' less than a full screen.
5361 The next window is the one below the current one; or the one at the top
5362 if the current one is at the bottom. Negative ARG means scroll downward.
5363 If ARG is the atom `-', scroll downward by nearly full screen.
5364 When calling from a program, supply as argument a number, nil, or `-'.
5366 If `other-window-scroll-buffer' is non-nil, scroll the window
5367 showing that buffer, popping the buffer up if necessary.
5368 If in the minibuffer, `minibuffer-scroll-window' if non-nil
5369 specifies the window to scroll. This takes precedence over
5370 `other-window-scroll-buffer'. */)
5375 int count
= SPECPDL_INDEX ();
5377 window
= Fother_window_for_scrolling ();
5378 w
= XWINDOW (window
);
5380 /* Don't screw up if window_scroll gets an error. */
5381 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
5382 ++windows_or_buffers_changed
;
5384 Fset_buffer (w
->buffer
);
5385 SET_PT (marker_position (w
->pointm
));
5388 window_scroll (window
, 1, 1, 1);
5389 else if (EQ (arg
, Qminus
))
5390 window_scroll (window
, -1, 1, 1);
5396 window_scroll (window
, XINT (arg
), 0, 1);
5399 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
5400 unbind_to (count
, Qnil
);
5405 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 2, "^P\np",
5406 doc
: /* Scroll selected window display ARG columns left.
5407 Default for ARG is window width minus 2.
5408 Value is the total amount of leftward horizontal scrolling in
5409 effect after the change.
5410 If SET-MINIMUM is non-nil, the new scroll amount becomes the
5411 lower bound for automatic scrolling, i.e. automatic scrolling
5412 will not scroll a window to a column less than the value returned
5413 by this function. This happens in an interactive call. */)
5414 (register Lisp_Object arg
, Lisp_Object set_minimum
)
5418 struct window
*w
= XWINDOW (selected_window
);
5421 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5423 arg
= Fprefix_numeric_value (arg
);
5425 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
5426 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5428 if (!NILP (set_minimum
))
5429 w
->min_hscroll
= w
->hscroll
;
5434 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 2, "^P\np",
5435 doc
: /* Scroll selected window display ARG columns right.
5436 Default for ARG is window width minus 2.
5437 Value is the total amount of leftward horizontal scrolling in
5438 effect after the change.
5439 If SET-MINIMUM is non-nil, the new scroll amount becomes the
5440 lower bound for automatic scrolling, i.e. automatic scrolling
5441 will not scroll a window to a column less than the value returned
5442 by this function. This happens in an interactive call. */)
5443 (register Lisp_Object arg
, Lisp_Object set_minimum
)
5447 struct window
*w
= XWINDOW (selected_window
);
5450 XSETFASTINT (arg
, window_box_text_cols (w
) - 2);
5452 arg
= Fprefix_numeric_value (arg
);
5454 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
5455 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
5457 if (!NILP (set_minimum
))
5458 w
->min_hscroll
= w
->hscroll
;
5463 DEFUN ("minibuffer-selected-window", Fminibuffer_selected_window
, Sminibuffer_selected_window
, 0, 0, 0,
5464 doc
: /* Return the window which was selected when entering the minibuffer.
5465 Returns nil, if selected window is not a minibuffer window. */)
5468 if (minibuf_level
> 0
5469 && MINI_WINDOW_P (XWINDOW (selected_window
))
5470 && WINDOW_LIVE_P (minibuf_selected_window
))
5471 return minibuf_selected_window
;
5476 /* Value is the number of lines actually displayed in window W,
5477 as opposed to its height. */
5480 displayed_window_lines (struct window
*w
)
5483 struct text_pos start
;
5484 int height
= window_box_height (w
);
5485 struct buffer
*old_buffer
;
5487 void *itdata
= NULL
;
5489 if (XBUFFER (w
->buffer
) != current_buffer
)
5491 old_buffer
= current_buffer
;
5492 set_buffer_internal (XBUFFER (w
->buffer
));
5497 /* In case W->start is out of the accessible range, do something
5498 reasonable. This happens in Info mode when Info-scroll-down
5499 calls (recenter -1) while W->start is 1. */
5500 if (XMARKER (w
->start
)->charpos
< BEGV
)
5501 SET_TEXT_POS (start
, BEGV
, BEGV_BYTE
);
5502 else if (XMARKER (w
->start
)->charpos
> ZV
)
5503 SET_TEXT_POS (start
, ZV
, ZV_BYTE
);
5505 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
5507 itdata
= bidi_shelve_cache ();
5508 start_display (&it
, w
, start
);
5509 move_it_vertically (&it
, height
);
5510 bottom_y
= line_bottom_y (&it
);
5511 bidi_unshelve_cache (itdata
, 0);
5513 /* rms: On a non-window display,
5514 the value of it.vpos at the bottom of the screen
5515 seems to be 1 larger than window_box_height (w).
5516 This kludge fixes a bug whereby (move-to-window-line -1)
5517 when ZV is on the last screen line
5518 moves to the previous screen line instead of the last one. */
5519 if (! FRAME_WINDOW_P (XFRAME (w
->frame
)))
5522 /* Add in empty lines at the bottom of the window. */
5523 if (bottom_y
< height
)
5525 int uy
= FRAME_LINE_HEIGHT (it
.f
);
5526 it
.vpos
+= (height
- bottom_y
+ uy
- 1) / uy
;
5530 set_buffer_internal (old_buffer
);
5536 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
5537 doc
: /* Center point in selected window and maybe redisplay frame.
5538 With prefix argument ARG, recenter putting point on screen line ARG
5539 relative to the selected window. If ARG is negative, it counts up from the
5540 bottom of the window. (ARG should be less than the height of the window.)
5542 If ARG is omitted or nil, then recenter with point on the middle line of
5543 the selected window; if the variable `recenter-redisplay' is non-nil,
5544 also erase the entire frame and redraw it (when `auto-resize-tool-bars'
5545 is set to `grow-only', this resets the tool-bar's height to the minimum
5546 height needed); if `recenter-redisplay' has the special value `tty',
5547 then only tty frame are redrawn.
5549 Just C-u as prefix means put point in the center of the window
5550 and redisplay normally--don't erase and redraw the frame. */)
5551 (register Lisp_Object arg
)
5553 struct window
*w
= XWINDOW (selected_window
);
5554 struct buffer
*buf
= XBUFFER (w
->buffer
);
5555 struct buffer
*obuf
= current_buffer
;
5557 EMACS_INT charpos
, bytepos
;
5558 int iarg
IF_LINT (= 0);
5559 int this_scroll_margin
;
5561 /* If redisplay is suppressed due to an error, try again. */
5562 obuf
->display_error_modiff
= 0;
5566 if (!NILP (Vrecenter_redisplay
)
5567 && (!EQ (Vrecenter_redisplay
, Qtty
)
5568 || !NILP (Ftty_type (selected_frame
))))
5572 /* Invalidate pixel data calculated for all compositions. */
5573 for (i
= 0; i
< n_compositions
; i
++)
5574 composition_table
[i
]->font
= NULL
;
5576 WINDOW_XFRAME (w
)->minimize_tool_bar_window_p
= 1;
5578 Fredraw_frame (WINDOW_FRAME (w
));
5579 SET_FRAME_GARBAGED (WINDOW_XFRAME (w
));
5584 else if (CONSP (arg
)) /* Just C-u. */
5588 arg
= Fprefix_numeric_value (arg
);
5593 set_buffer_internal (buf
);
5595 /* Do this after making BUF current
5596 in case scroll_margin is buffer-local. */
5597 this_scroll_margin
= max (0, scroll_margin
);
5598 this_scroll_margin
= min (this_scroll_margin
,
5599 XFASTINT (w
->total_lines
) / 4);
5601 /* Handle centering on a graphical frame specially. Such frames can
5602 have variable-height lines and centering point on the basis of
5603 line counts would lead to strange effects. */
5604 if (FRAME_WINDOW_P (XFRAME (w
->frame
)))
5610 void *itdata
= bidi_shelve_cache ();
5612 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5613 start_display (&it
, w
, pt
);
5614 move_it_vertically_backward (&it
, window_box_height (w
) / 2);
5615 charpos
= IT_CHARPOS (it
);
5616 bytepos
= IT_BYTEPOS (it
);
5617 bidi_unshelve_cache (itdata
, 0);
5624 int extra_line_spacing
;
5625 int h
= window_box_height (w
);
5626 void *itdata
= bidi_shelve_cache ();
5628 iarg
= - max (-iarg
, this_scroll_margin
);
5630 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
5631 start_display (&it
, w
, pt
);
5633 /* Be sure we have the exact height of the full line containing PT. */
5634 move_it_by_lines (&it
, 0);
5636 /* The amount of pixels we have to move back is the window
5637 height minus what's displayed in the line containing PT,
5638 and the lines below. */
5641 move_it_by_lines (&it
, nlines
);
5643 if (it
.vpos
== nlines
)
5647 /* Last line has no newline */
5648 h
-= line_bottom_y (&it
);
5652 /* Don't reserve space for extra line spacing of last line. */
5653 extra_line_spacing
= it
.max_extra_line_spacing
;
5655 /* If we can't move down NLINES lines because we hit
5656 the end of the buffer, count in some empty lines. */
5657 if (it
.vpos
< nlines
)
5660 extra_line_spacing
= it
.extra_line_spacing
;
5661 h
-= nlines
* (FRAME_LINE_HEIGHT (it
.f
) + extra_line_spacing
);
5665 bidi_unshelve_cache (itdata
, 0);
5669 /* Now find the new top line (starting position) of the window. */
5670 start_display (&it
, w
, pt
);
5672 move_it_vertically_backward (&it
, h
);
5674 /* If extra line spacing is present, we may move too far
5675 back. This causes the last line to be only partially
5676 visible (which triggers redisplay to recenter that line
5677 in the middle), so move forward.
5678 But ignore extra line spacing on last line, as it is not
5679 considered to be part of the visible height of the line.
5681 h
+= extra_line_spacing
;
5682 while (-it
.current_y
> h
)
5683 move_it_by_lines (&it
, 1);
5685 charpos
= IT_CHARPOS (it
);
5686 bytepos
= IT_BYTEPOS (it
);
5688 bidi_unshelve_cache (itdata
, 0);
5692 struct position pos
;
5694 iarg
= max (iarg
, this_scroll_margin
);
5696 pos
= *vmotion (PT
, -iarg
, w
);
5697 charpos
= pos
.bufpos
;
5698 bytepos
= pos
.bytepos
;
5703 struct position pos
;
5704 int ht
= window_internal_height (w
);
5711 /* Don't let it get into the margin at either top or bottom. */
5712 iarg
= max (iarg
, this_scroll_margin
);
5713 iarg
= min (iarg
, ht
- this_scroll_margin
- 1);
5715 pos
= *vmotion (PT
, - iarg
, w
);
5716 charpos
= pos
.bufpos
;
5717 bytepos
= pos
.bytepos
;
5720 /* Set the new window start. */
5721 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
5722 w
->window_end_valid
= Qnil
;
5724 w
->optional_new_start
= Qt
;
5726 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
5727 w
->start_at_line_beg
= Qt
;
5729 w
->start_at_line_beg
= Qnil
;
5731 set_buffer_internal (obuf
);
5736 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
5738 doc
: /* Return the height in lines of the text display area of WINDOW.
5739 WINDOW defaults to the selected window.
5741 The return value does not include the mode line, any header line, nor
5742 any partial-height lines in the text display area. */)
5743 (Lisp_Object window
)
5745 struct window
*w
= decode_window (window
);
5746 int pixel_height
= window_box_height (w
);
5747 int line_height
= pixel_height
/ FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
5748 return make_number (line_height
);
5753 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
5755 doc
: /* Position point relative to window.
5756 With no argument, position point at center of window.
5757 An argument specifies vertical position within the window;
5758 zero means top of window, negative means relative to bottom of window. */)
5761 struct window
*w
= XWINDOW (selected_window
);
5765 int this_scroll_margin
;
5768 if (!(BUFFERP (w
->buffer
)
5769 && XBUFFER (w
->buffer
) == current_buffer
))
5770 /* This test is needed to make sure PT/PT_BYTE make sense in w->buffer
5771 when passed below to set_marker_both. */
5772 error ("move-to-window-line called from unrelated buffer");
5774 window
= selected_window
;
5775 start
= marker_position (w
->start
);
5776 if (start
< BEGV
|| start
> ZV
)
5778 int height
= window_internal_height (w
);
5779 Fvertical_motion (make_number (- (height
/ 2)), window
);
5780 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
5781 w
->start_at_line_beg
= Fbolp ();
5782 w
->force_start
= Qt
;
5785 Fgoto_char (w
->start
);
5787 lines
= displayed_window_lines (w
);
5790 this_scroll_margin
= max (0, scroll_margin
);
5791 this_scroll_margin
= min (this_scroll_margin
, lines
/ 4);
5795 XSETFASTINT (arg
, lines
/ 2);
5798 int iarg
= XINT (Fprefix_numeric_value (arg
));
5801 iarg
= iarg
+ lines
;
5803 #if 0 /* This code would prevent move-to-window-line from moving point
5804 to a place inside the scroll margins (which would cause the
5805 next redisplay to scroll). I wrote this code, but then concluded
5806 it is probably better not to install it. However, it is here
5807 inside #if 0 so as not to lose it. -- rms. */
5809 /* Don't let it get into the margin at either top or bottom. */
5810 iarg
= max (iarg
, this_scroll_margin
);
5811 iarg
= min (iarg
, lines
- this_scroll_margin
- 1);
5814 arg
= make_number (iarg
);
5817 /* Skip past a partially visible first line. */
5819 XSETINT (arg
, XINT (arg
) + 1);
5821 return Fvertical_motion (arg
, window
);
5826 /***********************************************************************
5827 Window Configuration
5828 ***********************************************************************/
5830 struct save_window_data
5832 struct vectorlike_header header
;
5833 Lisp_Object selected_frame
;
5834 Lisp_Object current_window
;
5835 Lisp_Object current_buffer
;
5836 Lisp_Object minibuf_scroll_window
;
5837 Lisp_Object minibuf_selected_window
;
5838 Lisp_Object root_window
;
5839 Lisp_Object focus_frame
;
5840 /* A vector, each of whose elements is a struct saved_window
5842 Lisp_Object saved_windows
;
5844 /* All fields above are traced by the GC.
5845 From `fame-cols' down, the fields are ignored by the GC. */
5847 int frame_cols
, frame_lines
, frame_menu_bar_lines
;
5848 int frame_tool_bar_lines
;
5851 /* This is saved as a Lisp_Vector */
5854 struct vectorlike_header header
;
5856 Lisp_Object buffer
, start
, pointm
, mark
;
5857 Lisp_Object left_col
, top_line
, total_cols
, total_lines
;
5858 Lisp_Object hscroll
, min_hscroll
;
5859 Lisp_Object parent
, prev
;
5860 Lisp_Object start_at_line_beg
;
5861 Lisp_Object display_table
;
5862 Lisp_Object orig_top_line
, orig_total_lines
;
5863 Lisp_Object left_margin_cols
, right_margin_cols
;
5864 Lisp_Object left_fringe_width
, right_fringe_width
, fringes_outside_margins
;
5865 Lisp_Object scroll_bar_width
, vertical_scroll_bar_type
;
5866 Lisp_Object dedicated
, resize_proportionally
;
5869 #define SAVED_WINDOW_N(swv,n) \
5870 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
5872 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
5873 doc
: /* Return t if OBJECT is a window-configuration object. */)
5874 (Lisp_Object object
)
5876 return WINDOW_CONFIGURATIONP (object
) ? Qt
: Qnil
;
5879 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
5880 doc
: /* Return the frame that CONFIG, a window-configuration object, is about. */)
5881 (Lisp_Object config
)
5883 register struct save_window_data
*data
;
5884 struct Lisp_Vector
*saved_windows
;
5886 CHECK_WINDOW_CONFIGURATION (config
);
5888 data
= (struct save_window_data
*) XVECTOR (config
);
5889 saved_windows
= XVECTOR (data
->saved_windows
);
5890 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5893 DEFUN ("set-window-configuration", Fset_window_configuration
,
5894 Sset_window_configuration
, 1, 1, 0,
5895 doc
: /* Set the configuration of windows and buffers as specified by CONFIGURATION.
5896 CONFIGURATION must be a value previously returned
5897 by `current-window-configuration' (which see).
5898 If CONFIGURATION was made from a frame that is now deleted,
5899 only frame-independent values can be restored. In this case,
5900 the return value is nil. Otherwise the value is t. */)
5901 (Lisp_Object configuration
)
5903 register struct save_window_data
*data
;
5904 struct Lisp_Vector
*saved_windows
;
5905 Lisp_Object new_current_buffer
;
5908 EMACS_INT old_point
= -1;
5910 CHECK_WINDOW_CONFIGURATION (configuration
);
5912 data
= (struct save_window_data
*) XVECTOR (configuration
);
5913 saved_windows
= XVECTOR (data
->saved_windows
);
5915 new_current_buffer
= data
->current_buffer
;
5916 if (NILP (BVAR (XBUFFER (new_current_buffer
), name
)))
5917 new_current_buffer
= Qnil
;
5920 if (XBUFFER (new_current_buffer
) == current_buffer
)
5921 /* The code further down "preserves point" by saving here PT in
5922 old_point and then setting it later back into PT. When the
5923 current-selected-window and the final-selected-window both show
5924 the current buffer, this suffers from the problem that the
5925 current PT is the window-point of the current-selected-window,
5926 while the final PT is the point of the final-selected-window, so
5927 this copy from one PT to the other would end up moving the
5928 window-point of the final-selected-window to the window-point of
5929 the current-selected-window. So we have to be careful which
5930 point of the current-buffer we copy into old_point. */
5931 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
5932 && WINDOWP (selected_window
)
5933 && EQ (XWINDOW (selected_window
)->buffer
, new_current_buffer
)
5934 && !EQ (selected_window
, data
->current_window
))
5935 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
5939 /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of
5940 point in new_current_buffer as of the last time this buffer was
5941 used. This can be non-deterministic since it can be changed by
5942 things like jit-lock by mere temporary selection of some random
5943 window that happens to show this buffer.
5944 So if possible we want this arbitrary choice of "which point" to
5945 be the one from the to-be-selected-window so as to prevent this
5946 window's cursor from being copied from another window. */
5947 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
)
5948 /* If current_window = selected_window, its point is in BUF_PT. */
5949 && !EQ (selected_window
, data
->current_window
))
5950 old_point
= XMARKER (XWINDOW (data
->current_window
)->pointm
)->charpos
;
5952 old_point
= BUF_PT (XBUFFER (new_current_buffer
));
5955 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
5958 /* If f is a dead frame, don't bother rebuilding its window tree.
5959 However, there is other stuff we should still try to do below. */
5960 if (FRAME_LIVE_P (f
))
5962 register struct window
*w
;
5963 register struct saved_window
*p
;
5964 struct window
*root_window
;
5965 struct window
**leaf_windows
;
5969 /* If the frame has been resized since this window configuration was
5970 made, we change the frame to the size specified in the
5971 configuration, restore the configuration, and then resize it
5972 back. We keep track of the prevailing height in these variables. */
5973 int previous_frame_lines
= FRAME_LINES (f
);
5974 int previous_frame_cols
= FRAME_COLS (f
);
5975 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
5976 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
5978 /* The mouse highlighting code could get screwed up
5979 if it runs during this. */
5982 if (data
->frame_lines
!= previous_frame_lines
5983 || data
->frame_cols
!= previous_frame_cols
)
5984 change_frame_size (f
, data
->frame_lines
,
5985 data
->frame_cols
, 0, 0, 0);
5986 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
5987 if (data
->frame_menu_bar_lines
5988 != previous_frame_menu_bar_lines
)
5989 x_set_menu_bar_lines (f
, make_number (data
->frame_menu_bar_lines
),
5991 #ifdef HAVE_WINDOW_SYSTEM
5992 if (data
->frame_tool_bar_lines
5993 != previous_frame_tool_bar_lines
)
5994 x_set_tool_bar_lines (f
, make_number (data
->frame_tool_bar_lines
),
5999 /* "Swap out" point from the selected window's buffer
6000 into the window itself. (Normally the pointm of the selected
6001 window holds garbage.) We do this now, before
6002 restoring the window contents, and prevent it from
6003 being done later on when we select a new window. */
6004 if (! NILP (XWINDOW (selected_window
)->buffer
))
6006 w
= XWINDOW (selected_window
);
6007 set_marker_both (w
->pointm
,
6009 BUF_PT (XBUFFER (w
->buffer
)),
6010 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6013 windows_or_buffers_changed
++;
6014 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
6016 /* Problem: Freeing all matrices and later allocating them again
6017 is a serious redisplay flickering problem. What we would
6018 really like to do is to free only those matrices not reused
6020 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
6022 = (struct window
**) alloca (count_windows (root_window
)
6023 * sizeof (struct window
*));
6024 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
6027 Mark all windows now on frame as "deleted".
6028 Restoring the new configuration "undeletes" any that are in it.
6030 Save their current buffers in their height fields, since we may
6031 need it later, if a buffer saved in the configuration is now
6033 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6035 for (k
= 0; k
< saved_windows
->header
.size
; k
++)
6037 p
= SAVED_WINDOW_N (saved_windows
, k
);
6038 w
= XWINDOW (p
->window
);
6041 if (!NILP (p
->parent
))
6042 w
->parent
= SAVED_WINDOW_N (saved_windows
,
6043 XFASTINT (p
->parent
))->window
;
6047 if (!NILP (p
->prev
))
6049 w
->prev
= SAVED_WINDOW_N (saved_windows
,
6050 XFASTINT (p
->prev
))->window
;
6051 XWINDOW (w
->prev
)->next
= p
->window
;
6056 if (!NILP (w
->parent
))
6058 if (EQ (p
->total_cols
, XWINDOW (w
->parent
)->total_cols
))
6060 XWINDOW (w
->parent
)->vchild
= p
->window
;
6061 XWINDOW (w
->parent
)->hchild
= Qnil
;
6065 XWINDOW (w
->parent
)->hchild
= p
->window
;
6066 XWINDOW (w
->parent
)->vchild
= Qnil
;
6071 /* If we squirreled away the buffer in the window's height,
6073 if (BUFFERP (w
->total_lines
))
6074 w
->buffer
= w
->total_lines
;
6075 w
->left_col
= p
->left_col
;
6076 w
->top_line
= p
->top_line
;
6077 w
->total_cols
= p
->total_cols
;
6078 w
->total_lines
= p
->total_lines
;
6079 w
->hscroll
= p
->hscroll
;
6080 w
->min_hscroll
= p
->min_hscroll
;
6081 w
->display_table
= p
->display_table
;
6082 w
->orig_top_line
= p
->orig_top_line
;
6083 w
->orig_total_lines
= p
->orig_total_lines
;
6084 w
->left_margin_cols
= p
->left_margin_cols
;
6085 w
->right_margin_cols
= p
->right_margin_cols
;
6086 w
->left_fringe_width
= p
->left_fringe_width
;
6087 w
->right_fringe_width
= p
->right_fringe_width
;
6088 w
->fringes_outside_margins
= p
->fringes_outside_margins
;
6089 w
->scroll_bar_width
= p
->scroll_bar_width
;
6090 w
->vertical_scroll_bar_type
= p
->vertical_scroll_bar_type
;
6091 w
->dedicated
= p
->dedicated
;
6092 w
->resize_proportionally
= p
->resize_proportionally
;
6093 XSETFASTINT (w
->last_modified
, 0);
6094 XSETFASTINT (w
->last_overlay_modified
, 0);
6096 /* Reinstall the saved buffer and pointers into it. */
6097 if (NILP (p
->buffer
))
6098 w
->buffer
= p
->buffer
;
6101 if (!NILP (BVAR (XBUFFER (p
->buffer
), name
)))
6102 /* If saved buffer is alive, install it. */
6104 w
->buffer
= p
->buffer
;
6105 w
->start_at_line_beg
= p
->start_at_line_beg
;
6106 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
6107 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
6108 Fset_marker (BVAR (XBUFFER (w
->buffer
), mark
),
6109 p
->mark
, w
->buffer
);
6111 /* As documented in Fcurrent_window_configuration, don't
6112 restore the location of point in the buffer which was
6113 current when the window configuration was recorded. */
6114 if (!EQ (p
->buffer
, new_current_buffer
)
6115 && XBUFFER (p
->buffer
) == current_buffer
)
6116 Fgoto_char (w
->pointm
);
6118 else if (NILP (w
->buffer
) || NILP (BVAR (XBUFFER (w
->buffer
), name
)))
6119 /* Else unless window has a live buffer, get one. */
6121 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
6122 /* This will set the markers to beginning of visible
6124 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
6125 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
6126 w
->start_at_line_beg
= Qt
;
6129 /* Keeping window's old buffer; make sure the markers
6132 /* Set window markers at start of visible range. */
6133 if (XMARKER (w
->start
)->buffer
== 0)
6134 set_marker_restricted (w
->start
, make_number (0),
6136 if (XMARKER (w
->pointm
)->buffer
== 0)
6137 set_marker_restricted_both (w
->pointm
, w
->buffer
,
6138 BUF_PT (XBUFFER (w
->buffer
)),
6139 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6140 w
->start_at_line_beg
= Qt
;
6145 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
6147 /* Arrange *not* to restore point in the buffer that was
6148 current when the window configuration was saved. */
6149 if (EQ (XWINDOW (data
->current_window
)->buffer
, new_current_buffer
))
6150 set_marker_restricted (XWINDOW (data
->current_window
)->pointm
,
6151 make_number (old_point
),
6152 XWINDOW (data
->current_window
)->buffer
);
6154 /* In the following call to `select-window, prevent "swapping
6155 out point" in the old selected window using the buffer that
6156 has been restored into it. We already swapped out that point
6157 from that window's old buffer. */
6158 select_window (data
->current_window
, Qnil
, 1);
6159 BVAR (XBUFFER (XWINDOW (selected_window
)->buffer
), last_selected_window
)
6162 if (NILP (data
->focus_frame
)
6163 || (FRAMEP (data
->focus_frame
)
6164 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
6165 Fredirect_frame_focus (frame
, data
->focus_frame
);
6167 /* Set the screen height to the value it had before this function. */
6168 if (previous_frame_lines
!= FRAME_LINES (f
)
6169 || previous_frame_cols
!= FRAME_COLS (f
))
6170 change_frame_size (f
, previous_frame_lines
, previous_frame_cols
,
6172 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
6173 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
6174 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
6176 #ifdef HAVE_WINDOW_SYSTEM
6177 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
6178 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
6183 /* Now, free glyph matrices in windows that were not reused. */
6184 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
6186 if (NILP (leaf_windows
[i
]->buffer
))
6188 /* Assert it's not reused as a combination. */
6189 xassert (NILP (leaf_windows
[i
]->hchild
)
6190 && NILP (leaf_windows
[i
]->vchild
));
6191 free_window_matrices (leaf_windows
[i
]);
6193 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
6201 /* Fselect_window will have made f the selected frame, so we
6202 reselect the proper frame here. Fhandle_switch_frame will change the
6203 selected window too, but that doesn't make the call to
6204 Fselect_window above totally superfluous; it still sets f's
6206 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
6207 do_switch_frame (data
->selected_frame
, 0, 0, Qnil
);
6209 run_window_configuration_change_hook (f
);
6212 if (!NILP (new_current_buffer
))
6213 Fset_buffer (new_current_buffer
);
6215 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
6216 minibuf_selected_window
= data
->minibuf_selected_window
;
6218 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
6221 /* Mark all windows now on frame as deleted
6222 by setting their buffers to nil. */
6225 delete_all_subwindows (register struct window
*w
)
6227 if (!NILP (w
->next
))
6228 delete_all_subwindows (XWINDOW (w
->next
));
6229 if (!NILP (w
->vchild
))
6230 delete_all_subwindows (XWINDOW (w
->vchild
));
6231 if (!NILP (w
->hchild
))
6232 delete_all_subwindows (XWINDOW (w
->hchild
));
6234 w
->total_lines
= w
->buffer
; /* See Fset_window_configuration for excuse. */
6236 if (!NILP (w
->buffer
))
6239 /* We set all three of these fields to nil, to make sure that we can
6240 distinguish this dead window from any live window. Live leaf
6241 windows will have buffer set, and combination windows will have
6242 vchild or hchild set. */
6247 Vwindow_list
= Qnil
;
6251 count_windows (register struct window
*window
)
6253 register int count
= 1;
6254 if (!NILP (window
->next
))
6255 count
+= count_windows (XWINDOW (window
->next
));
6256 if (!NILP (window
->vchild
))
6257 count
+= count_windows (XWINDOW (window
->vchild
));
6258 if (!NILP (window
->hchild
))
6259 count
+= count_windows (XWINDOW (window
->hchild
));
6264 /* Fill vector FLAT with leaf windows under W, starting at index I.
6265 Value is last index + 1. */
6268 get_leaf_windows (struct window
*w
, struct window
**flat
, int i
)
6272 if (!NILP (w
->hchild
))
6273 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
6274 else if (!NILP (w
->vchild
))
6275 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
6279 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6286 /* Return a pointer to the glyph W's physical cursor is on. Value is
6287 null if W's current matrix is invalid, so that no meaningfull glyph
6291 get_phys_cursor_glyph (struct window
*w
)
6293 struct glyph_row
*row
;
6294 struct glyph
*glyph
;
6296 if (w
->phys_cursor
.vpos
>= 0
6297 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
6298 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
6300 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
6301 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
6310 save_window_save (Lisp_Object window
, struct Lisp_Vector
*vector
, int i
)
6312 register struct saved_window
*p
;
6313 register struct window
*w
;
6314 register Lisp_Object tem
;
6316 for (;!NILP (window
); window
= w
->next
)
6318 p
= SAVED_WINDOW_N (vector
, i
);
6319 w
= XWINDOW (window
);
6321 XSETFASTINT (w
->temslot
, i
); i
++;
6323 p
->buffer
= w
->buffer
;
6324 p
->left_col
= w
->left_col
;
6325 p
->top_line
= w
->top_line
;
6326 p
->total_cols
= w
->total_cols
;
6327 p
->total_lines
= w
->total_lines
;
6328 p
->hscroll
= w
->hscroll
;
6329 p
->min_hscroll
= w
->min_hscroll
;
6330 p
->display_table
= w
->display_table
;
6331 p
->orig_top_line
= w
->orig_top_line
;
6332 p
->orig_total_lines
= w
->orig_total_lines
;
6333 p
->left_margin_cols
= w
->left_margin_cols
;
6334 p
->right_margin_cols
= w
->right_margin_cols
;
6335 p
->left_fringe_width
= w
->left_fringe_width
;
6336 p
->right_fringe_width
= w
->right_fringe_width
;
6337 p
->fringes_outside_margins
= w
->fringes_outside_margins
;
6338 p
->scroll_bar_width
= w
->scroll_bar_width
;
6339 p
->vertical_scroll_bar_type
= w
->vertical_scroll_bar_type
;
6340 p
->dedicated
= w
->dedicated
;
6341 p
->resize_proportionally
= w
->resize_proportionally
;
6342 if (!NILP (w
->buffer
))
6344 /* Save w's value of point in the window configuration.
6345 If w is the selected window, then get the value of point
6346 from the buffer; pointm is garbage in the selected window. */
6347 if (EQ (window
, selected_window
))
6349 p
->pointm
= Fmake_marker ();
6350 set_marker_both (p
->pointm
, w
->buffer
,
6351 BUF_PT (XBUFFER (w
->buffer
)),
6352 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
6355 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
6357 p
->start
= Fcopy_marker (w
->start
, Qnil
);
6358 p
->start_at_line_beg
= w
->start_at_line_beg
;
6360 tem
= BVAR (XBUFFER (w
->buffer
), mark
);
6361 p
->mark
= Fcopy_marker (tem
, Qnil
);
6368 p
->start_at_line_beg
= Qnil
;
6371 if (NILP (w
->parent
))
6374 p
->parent
= XWINDOW (w
->parent
)->temslot
;
6379 p
->prev
= XWINDOW (w
->prev
)->temslot
;
6381 if (!NILP (w
->vchild
))
6382 i
= save_window_save (w
->vchild
, vector
, i
);
6383 if (!NILP (w
->hchild
))
6384 i
= save_window_save (w
->hchild
, vector
, i
);
6390 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
6391 Scurrent_window_configuration
, 0, 1, 0,
6392 doc
: /* Return an object representing the current window configuration of FRAME.
6393 If FRAME is nil or omitted, use the selected frame.
6394 This describes the number of windows, their sizes and current buffers,
6395 and for each displayed buffer, where display starts, and the positions of
6396 point and mark. An exception is made for point in the current buffer:
6397 its value is -not- saved.
6398 This also records the currently selected frame, and FRAME's focus
6399 redirection (see `redirect-frame-focus'). */)
6402 register Lisp_Object tem
;
6403 register int n_windows
;
6404 register struct save_window_data
*data
;
6409 frame
= selected_frame
;
6410 CHECK_LIVE_FRAME (frame
);
6413 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6414 data
= ALLOCATE_PSEUDOVECTOR (struct save_window_data
, frame_cols
,
6415 PVEC_WINDOW_CONFIGURATION
);
6417 data
->frame_cols
= FRAME_COLS (f
);
6418 data
->frame_lines
= FRAME_LINES (f
);
6419 data
->frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
6420 data
->frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
6421 data
->selected_frame
= selected_frame
;
6422 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
6423 XSETBUFFER (data
->current_buffer
, current_buffer
);
6424 data
->minibuf_scroll_window
= minibuf_level
> 0 ? Vminibuf_scroll_window
: Qnil
;
6425 data
->minibuf_selected_window
= minibuf_level
> 0 ? minibuf_selected_window
: Qnil
;
6426 data
->root_window
= FRAME_ROOT_WINDOW (f
);
6427 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
6428 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
6429 data
->saved_windows
= tem
;
6430 for (i
= 0; i
< n_windows
; i
++)
6431 XVECTOR (tem
)->contents
[i
]
6432 = Fmake_vector (make_number (VECSIZE (struct saved_window
)), Qnil
);
6433 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
6434 XSETWINDOW_CONFIGURATION (tem
, data
);
6439 /***********************************************************************
6441 ***********************************************************************/
6444 window_tree (struct window
*w
)
6446 Lisp_Object tail
= Qnil
;
6447 Lisp_Object result
= Qnil
;
6454 if (!NILP (w
->hchild
))
6455 wn
= Fcons (Qnil
, Fcons (Fwindow_edges (wn
),
6456 window_tree (XWINDOW (w
->hchild
))));
6457 else if (!NILP (w
->vchild
))
6458 wn
= Fcons (Qt
, Fcons (Fwindow_edges (wn
),
6459 window_tree (XWINDOW (w
->vchild
))));
6463 result
= tail
= Fcons (wn
, Qnil
);
6467 XSETCDR (tail
, Fcons (wn
, Qnil
));
6471 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6479 DEFUN ("window-tree", Fwindow_tree
, Swindow_tree
,
6481 doc
: /* Return the window tree for frame FRAME.
6483 The return value is a list of the form (ROOT MINI), where ROOT
6484 represents the window tree of the frame's root window, and MINI
6485 is the frame's minibuffer window.
6487 If the root window is not split, ROOT is the root window itself.
6488 Otherwise, ROOT is a list (DIR EDGES W1 W2 ...) where DIR is nil for a
6489 horizontal split, and t for a vertical split, EDGES gives the combined
6490 size and position of the subwindows in the split, and the rest of the
6491 elements are the subwindows in the split. Each of the subwindows may
6492 again be a window or a list representing a window split, and so on.
6493 EDGES is a list \(LEFT TOP RIGHT BOTTOM) as returned by `window-edges'.
6495 If FRAME is nil or omitted, return information on the currently
6502 frame
= selected_frame
;
6504 CHECK_FRAME (frame
);
6507 if (!FRAME_LIVE_P (f
))
6510 return window_tree (XWINDOW (FRAME_ROOT_WINDOW (f
)));
6514 /***********************************************************************
6516 ***********************************************************************/
6518 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
6520 doc
: /* Set width of marginal areas of window WINDOW.
6521 If WINDOW is nil, set margins of the currently selected window.
6522 Second arg LEFT-WIDTH specifies the number of character cells to
6523 reserve for the left marginal area. Optional third arg RIGHT-WIDTH
6524 does the same for the right marginal area. A nil width parameter
6525 means no margin. */)
6526 (Lisp_Object window
, Lisp_Object left_width
, Lisp_Object right_width
)
6528 struct window
*w
= decode_window (window
);
6530 /* Translate negative or zero widths to nil.
6531 Margins that are too wide have to be checked elsewhere. */
6533 if (!NILP (left_width
))
6535 CHECK_NUMBER (left_width
);
6536 if (XINT (left_width
) <= 0)
6540 if (!NILP (right_width
))
6542 CHECK_NUMBER (right_width
);
6543 if (XINT (right_width
) <= 0)
6547 if (!EQ (w
->left_margin_cols
, left_width
)
6548 || !EQ (w
->right_margin_cols
, right_width
))
6550 w
->left_margin_cols
= left_width
;
6551 w
->right_margin_cols
= right_width
;
6553 adjust_window_margins (w
);
6555 ++windows_or_buffers_changed
;
6556 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6563 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
6565 doc
: /* Get width of marginal areas of window WINDOW.
6566 If WINDOW is omitted or nil, use the currently selected window.
6567 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).
6568 If a marginal area does not exist, its width will be returned
6570 (Lisp_Object window
)
6572 struct window
*w
= decode_window (window
);
6573 return Fcons (w
->left_margin_cols
, w
->right_margin_cols
);
6578 /***********************************************************************
6580 ***********************************************************************/
6582 DEFUN ("set-window-fringes", Fset_window_fringes
, Sset_window_fringes
,
6584 doc
: /* Set the fringe widths of window WINDOW.
6585 If WINDOW is nil, set the fringe widths of the currently selected
6587 Second arg LEFT-WIDTH specifies the number of pixels to reserve for
6588 the left fringe. Optional third arg RIGHT-WIDTH specifies the right
6589 fringe width. If a fringe width arg is nil, that means to use the
6590 frame's default fringe width. Default fringe widths can be set with
6591 the command `set-fringe-style'.
6592 If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes
6593 outside of the display margins. By default, fringes are drawn between
6594 display marginal areas and the text area. */)
6595 (Lisp_Object window
, Lisp_Object left_width
, Lisp_Object right_width
, Lisp_Object outside_margins
)
6597 struct window
*w
= decode_window (window
);
6599 if (!NILP (left_width
))
6600 CHECK_NATNUM (left_width
);
6601 if (!NILP (right_width
))
6602 CHECK_NATNUM (right_width
);
6604 /* Do nothing on a tty. */
6605 if (FRAME_WINDOW_P (WINDOW_XFRAME (w
))
6606 && (!EQ (w
->left_fringe_width
, left_width
)
6607 || !EQ (w
->right_fringe_width
, right_width
)
6608 || !EQ (w
->fringes_outside_margins
, outside_margins
)))
6610 w
->left_fringe_width
= left_width
;
6611 w
->right_fringe_width
= right_width
;
6612 w
->fringes_outside_margins
= outside_margins
;
6614 adjust_window_margins (w
);
6616 clear_glyph_matrix (w
->current_matrix
);
6617 w
->window_end_valid
= Qnil
;
6619 ++windows_or_buffers_changed
;
6620 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6627 DEFUN ("window-fringes", Fwindow_fringes
, Swindow_fringes
,
6629 doc
: /* Get width of fringes of window WINDOW.
6630 If WINDOW is omitted or nil, use the currently selected window.
6631 Value is a list of the form (LEFT-WIDTH RIGHT-WIDTH OUTSIDE-MARGINS). */)
6632 (Lisp_Object window
)
6634 struct window
*w
= decode_window (window
);
6636 return Fcons (make_number (WINDOW_LEFT_FRINGE_WIDTH (w
)),
6637 Fcons (make_number (WINDOW_RIGHT_FRINGE_WIDTH (w
)),
6638 Fcons ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6639 ? Qt
: Qnil
), Qnil
)));
6644 /***********************************************************************
6646 ***********************************************************************/
6648 DEFUN ("set-window-scroll-bars", Fset_window_scroll_bars
,
6649 Sset_window_scroll_bars
, 2, 4, 0,
6650 doc
: /* Set width and type of scroll bars of window WINDOW.
6651 If window is nil, set scroll bars of the currently selected window.
6652 Second parameter WIDTH specifies the pixel width for the scroll bar;
6653 this is automatically adjusted to a multiple of the frame column width.
6654 Third parameter VERTICAL-TYPE specifies the type of the vertical scroll
6655 bar: left, right, or nil.
6656 If WIDTH is nil, use the frame's scroll-bar width.
6657 If VERTICAL-TYPE is t, use the frame's scroll-bar type.
6658 Fourth parameter HORIZONTAL-TYPE is currently unused. */)
6659 (Lisp_Object window
, Lisp_Object width
, Lisp_Object vertical_type
, Lisp_Object horizontal_type
)
6661 struct window
*w
= decode_window (window
);
6665 CHECK_NATNUM (width
);
6667 if (XINT (width
) == 0)
6668 vertical_type
= Qnil
;
6671 if (!(NILP (vertical_type
)
6672 || EQ (vertical_type
, Qleft
)
6673 || EQ (vertical_type
, Qright
)
6674 || EQ (vertical_type
, Qt
)))
6675 error ("Invalid type of vertical scroll bar");
6677 if (!EQ (w
->scroll_bar_width
, width
)
6678 || !EQ (w
->vertical_scroll_bar_type
, vertical_type
))
6680 w
->scroll_bar_width
= width
;
6681 w
->vertical_scroll_bar_type
= vertical_type
;
6683 adjust_window_margins (w
);
6685 clear_glyph_matrix (w
->current_matrix
);
6686 w
->window_end_valid
= Qnil
;
6688 ++windows_or_buffers_changed
;
6689 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
6696 DEFUN ("window-scroll-bars", Fwindow_scroll_bars
, Swindow_scroll_bars
,
6698 doc
: /* Get width and type of scroll bars of window WINDOW.
6699 If WINDOW is omitted or nil, use the currently selected window.
6700 Value is a list of the form (WIDTH COLS VERTICAL-TYPE HORIZONTAL-TYPE).
6701 If WIDTH is nil or TYPE is t, the window is using the frame's corresponding
6703 (Lisp_Object window
)
6705 struct window
*w
= decode_window (window
);
6706 return Fcons (make_number ((WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6707 ? WINDOW_CONFIG_SCROLL_BAR_WIDTH (w
)
6708 : WINDOW_SCROLL_BAR_AREA_WIDTH (w
))),
6709 Fcons (make_number (WINDOW_SCROLL_BAR_COLS (w
)),
6710 Fcons (w
->vertical_scroll_bar_type
,
6711 Fcons (Qnil
, Qnil
))));
6716 /***********************************************************************
6718 ***********************************************************************/
6720 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 2, 0,
6721 doc
: /* Return the amount by which WINDOW is scrolled vertically.
6722 Use the selected window if WINDOW is nil or omitted.
6723 Normally, value is a multiple of the canonical character height of WINDOW;
6724 optional second arg PIXELS-P means value is measured in pixels. */)
6725 (Lisp_Object window
, Lisp_Object pixels_p
)
6732 window
= selected_window
;
6734 CHECK_WINDOW (window
);
6735 w
= XWINDOW (window
);
6736 f
= XFRAME (w
->frame
);
6738 if (FRAME_WINDOW_P (f
))
6739 result
= (NILP (pixels_p
)
6740 ? FRAME_CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
)
6741 : make_number (-w
->vscroll
));
6743 result
= make_number (0);
6748 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
6750 doc
: /* Set amount by which WINDOW should be scrolled vertically to VSCROLL.
6751 WINDOW nil means use the selected window. Normally, VSCROLL is a
6752 non-negative multiple of the canonical character height of WINDOW;
6753 optional third arg PIXELS-P non-nil means that VSCROLL is in pixels.
6754 If PIXELS-P is nil, VSCROLL may have to be rounded so that it
6755 corresponds to an integral number of pixels. The return value is the
6756 result of this rounding.
6757 If PIXELS-P is non-nil, the return value is VSCROLL. */)
6758 (Lisp_Object window
, Lisp_Object vscroll
, Lisp_Object pixels_p
)
6764 window
= selected_window
;
6766 CHECK_WINDOW (window
);
6767 CHECK_NUMBER_OR_FLOAT (vscroll
);
6769 w
= XWINDOW (window
);
6770 f
= XFRAME (w
->frame
);
6772 if (FRAME_WINDOW_P (f
))
6774 int old_dy
= w
->vscroll
;
6776 w
->vscroll
= - (NILP (pixels_p
)
6777 ? FRAME_LINE_HEIGHT (f
) * XFLOATINT (vscroll
)
6778 : XFLOATINT (vscroll
));
6779 w
->vscroll
= min (w
->vscroll
, 0);
6781 if (w
->vscroll
!= old_dy
)
6783 /* Adjust glyph matrix of the frame if the virtual display
6784 area becomes larger than before. */
6785 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
6788 /* Prevent redisplay shortcuts. */
6789 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
6793 return Fwindow_vscroll (window
, pixels_p
);
6797 /* Call FN for all leaf windows on frame F. FN is called with the
6798 first argument being a pointer to the leaf window, and with
6799 additional argument USER_DATA. Stops when FN returns 0. */
6802 foreach_window (struct frame
*f
, int (*fn
) (struct window
*, void *),
6805 /* delete_frame may set FRAME_ROOT_WINDOW (f) to Qnil. */
6806 if (WINDOWP (FRAME_ROOT_WINDOW (f
)))
6807 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
6811 /* Helper function for foreach_window. Call FN for all leaf windows
6812 reachable from W. FN is called with the first argument being a
6813 pointer to the leaf window, and with additional argument USER_DATA.
6814 Stop when FN returns 0. Value is 0 if stopped by FN. */
6817 foreach_window_1 (struct window
*w
, int (*fn
) (struct window
*, void *), void *user_data
)
6821 for (cont
= 1; w
&& cont
;)
6823 if (!NILP (w
->hchild
))
6824 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
6825 else if (!NILP (w
->vchild
))
6826 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
6828 cont
= fn (w
, user_data
);
6830 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
6837 /* Freeze or unfreeze the window start of W unless it is a
6838 mini-window or the selected window. FREEZE_P non-null means freeze
6839 the window start. */
6842 freeze_window_start (struct window
*w
, void *freeze_p
)
6844 if (MINI_WINDOW_P (w
)
6845 || (WINDOWP (selected_window
) /* Can be nil in corner cases. */
6846 && (w
== XWINDOW (selected_window
)
6847 || (MINI_WINDOW_P (XWINDOW (selected_window
))
6848 && ! NILP (Vminibuf_scroll_window
)
6849 && w
== XWINDOW (Vminibuf_scroll_window
)))))
6852 w
->frozen_window_start_p
= freeze_p
!= NULL
;
6857 /* Freeze or unfreeze the window starts of all leaf windows on frame
6858 F, except the selected window and a mini-window. FREEZE_P non-zero
6859 means freeze the window start. */
6862 freeze_window_starts (struct frame
*f
, int freeze_p
)
6864 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
6868 /***********************************************************************
6870 ***********************************************************************/
6872 /* Return 1 if window configurations C1 and C2
6873 describe the same state of affairs. This is used by Fequal. */
6876 compare_window_configurations (Lisp_Object c1
, Lisp_Object c2
, int ignore_positions
)
6878 register struct save_window_data
*d1
, *d2
;
6879 struct Lisp_Vector
*sw1
, *sw2
;
6882 CHECK_WINDOW_CONFIGURATION (c1
);
6883 CHECK_WINDOW_CONFIGURATION (c2
);
6885 d1
= (struct save_window_data
*) XVECTOR (c1
);
6886 d2
= (struct save_window_data
*) XVECTOR (c2
);
6887 sw1
= XVECTOR (d1
->saved_windows
);
6888 sw2
= XVECTOR (d2
->saved_windows
);
6890 if (d1
->frame_cols
!= d2
->frame_cols
)
6892 if (d1
->frame_lines
!= d2
->frame_lines
)
6894 if (d1
->frame_menu_bar_lines
!= d2
->frame_menu_bar_lines
)
6896 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
6898 /* Don't compare the current_window field directly.
6899 Instead see w1_is_current and w2_is_current, below. */
6900 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
6902 if (! ignore_positions
)
6904 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
6906 if (! EQ (d1
->minibuf_selected_window
, d2
->minibuf_selected_window
))
6909 /* Don't compare the root_window field.
6910 We don't require the two configurations
6911 to use the same window object,
6912 and the two root windows must be equivalent
6913 if everything else compares equal. */
6914 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
6917 /* Verify that the two confis have the same number of windows. */
6918 if (sw1
->header
.size
!= sw2
->header
.size
)
6921 for (i
= 0; i
< sw1
->header
.size
; i
++)
6923 struct saved_window
*p1
, *p2
;
6924 int w1_is_current
, w2_is_current
;
6926 p1
= SAVED_WINDOW_N (sw1
, i
);
6927 p2
= SAVED_WINDOW_N (sw2
, i
);
6929 /* Verify that the current windows in the two
6930 configurations correspond to each other. */
6931 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
6932 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
6934 if (w1_is_current
!= w2_is_current
)
6937 /* Verify that the corresponding windows do match. */
6938 if (! EQ (p1
->buffer
, p2
->buffer
))
6940 if (! EQ (p1
->left_col
, p2
->left_col
))
6942 if (! EQ (p1
->top_line
, p2
->top_line
))
6944 if (! EQ (p1
->total_cols
, p2
->total_cols
))
6946 if (! EQ (p1
->total_lines
, p2
->total_lines
))
6948 if (! EQ (p1
->display_table
, p2
->display_table
))
6950 if (! EQ (p1
->parent
, p2
->parent
))
6952 if (! EQ (p1
->prev
, p2
->prev
))
6954 if (! ignore_positions
)
6956 if (! EQ (p1
->hscroll
, p2
->hscroll
))
6958 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
6960 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
6962 if (NILP (Fequal (p1
->start
, p2
->start
)))
6964 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
6966 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
6969 if (! EQ (p1
->left_margin_cols
, p2
->left_margin_cols
))
6971 if (! EQ (p1
->right_margin_cols
, p2
->right_margin_cols
))
6973 if (! EQ (p1
->left_fringe_width
, p2
->left_fringe_width
))
6975 if (! EQ (p1
->right_fringe_width
, p2
->right_fringe_width
))
6977 if (! EQ (p1
->fringes_outside_margins
, p2
->fringes_outside_margins
))
6979 if (! EQ (p1
->scroll_bar_width
, p2
->scroll_bar_width
))
6981 if (! EQ (p1
->vertical_scroll_bar_type
, p2
->vertical_scroll_bar_type
))
6988 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
6989 Scompare_window_configurations
, 2, 2, 0,
6990 doc
: /* Compare two window configurations as regards the structure of windows.
6991 This function ignores details such as the values of point and mark
6992 and scrolling positions. */)
6993 (Lisp_Object x
, Lisp_Object y
)
6995 if (compare_window_configurations (x
, y
, 1))
7001 init_window_once (void)
7003 struct frame
*f
= make_initial_frame ();
7004 XSETFRAME (selected_frame
, f
);
7005 Vterminal_frame
= selected_frame
;
7006 minibuf_window
= f
->minibuffer_window
;
7007 selected_window
= f
->selected_window
;
7008 last_nonminibuf_frame
= f
;
7010 window_initialized
= 1;
7016 Vwindow_list
= Qnil
;
7020 syms_of_window (void)
7022 Qscroll_up
= intern_c_string ("scroll-up");
7023 staticpro (&Qscroll_up
);
7025 Qscroll_down
= intern_c_string ("scroll-down");
7026 staticpro (&Qscroll_down
);
7028 Qscroll_command
= intern_c_string ("scroll-command");
7029 staticpro (&Qscroll_command
);
7031 Fput (Qscroll_up
, Qscroll_command
, Qt
);
7032 Fput (Qscroll_down
, Qscroll_command
, Qt
);
7034 Qwindow_size_fixed
= intern_c_string ("window-size-fixed");
7035 staticpro (&Qwindow_size_fixed
);
7036 Fset (Qwindow_size_fixed
, Qnil
);
7038 staticpro (&Qwindow_configuration_change_hook
);
7039 Qwindow_configuration_change_hook
7040 = intern_c_string ("window-configuration-change-hook");
7042 Qwindowp
= intern_c_string ("windowp");
7043 staticpro (&Qwindowp
);
7045 Qwindow_configuration_p
= intern_c_string ("window-configuration-p");
7046 staticpro (&Qwindow_configuration_p
);
7048 Qwindow_live_p
= intern_c_string ("window-live-p");
7049 staticpro (&Qwindow_live_p
);
7051 Qdisplay_buffer
= intern_c_string ("display-buffer");
7052 staticpro (&Qdisplay_buffer
);
7054 Qtemp_buffer_show_hook
= intern_c_string ("temp-buffer-show-hook");
7055 staticpro (&Qtemp_buffer_show_hook
);
7057 staticpro (&Vwindow_list
);
7059 minibuf_selected_window
= Qnil
;
7060 staticpro (&minibuf_selected_window
);
7062 window_scroll_pixel_based_preserve_x
= -1;
7063 window_scroll_pixel_based_preserve_y
= -1;
7064 window_scroll_preserve_hpos
= -1;
7065 window_scroll_preserve_vpos
= -1;
7067 DEFVAR_LISP ("temp-buffer-show-function", Vtemp_buffer_show_function
,
7068 doc
: /* Non-nil means call as function to display a help buffer.
7069 The function is called with one argument, the buffer to be displayed.
7070 Used by `with-output-to-temp-buffer'.
7071 If this function is used, then it must do the entire job of showing
7072 the buffer; `temp-buffer-show-hook' is not run unless this function runs it. */);
7073 Vtemp_buffer_show_function
= Qnil
;
7075 DEFVAR_LISP ("minibuffer-scroll-window", Vminibuf_scroll_window
,
7076 doc
: /* Non-nil means it is the window that C-M-v in minibuffer should scroll. */);
7077 Vminibuf_scroll_window
= Qnil
;
7079 DEFVAR_BOOL ("mode-line-in-non-selected-windows", mode_line_in_non_selected_windows
,
7080 doc
: /* Non-nil means to use `mode-line-inactive' face in non-selected windows.
7081 If the minibuffer is active, the `minibuffer-scroll-window' mode line
7082 is displayed in the `mode-line' face. */);
7083 mode_line_in_non_selected_windows
= 1;
7085 DEFVAR_LISP ("other-window-scroll-buffer", Vother_window_scroll_buffer
,
7086 doc
: /* If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window. */);
7087 Vother_window_scroll_buffer
= Qnil
;
7089 DEFVAR_BOOL ("auto-window-vscroll", auto_window_vscroll_p
,
7090 doc
: /* *Non-nil means to automatically adjust `window-vscroll' to view tall lines. */);
7091 auto_window_vscroll_p
= 1;
7093 DEFVAR_INT ("next-screen-context-lines", next_screen_context_lines
,
7094 doc
: /* *Number of lines of continuity when scrolling by screenfuls. */);
7095 next_screen_context_lines
= 2;
7097 DEFVAR_INT ("window-min-height", window_min_height
,
7098 doc
: /* Allow deleting windows less than this tall.
7099 The value is measured in line units. If a window wants a modeline it
7100 is counted as one line.
7102 Emacs honors settings of this variable when enlarging or shrinking
7103 windows vertically. A value less than 1 is invalid. */);
7104 window_min_height
= 4;
7106 DEFVAR_INT ("window-min-width", window_min_width
,
7107 doc
: /* Allow deleting windows less than this wide.
7108 The value is measured in characters and includes any fringes or
7111 Emacs honors settings of this variable when enlarging or shrinking
7112 windows horizontally. A value less than 2 is invalid. */);
7113 window_min_width
= 10;
7115 DEFVAR_LISP ("scroll-preserve-screen-position",
7116 Vscroll_preserve_screen_position
,
7117 doc
: /* *Controls if scroll commands move point to keep its screen position unchanged.
7118 A value of nil means point does not keep its screen position except
7119 at the scroll margin or window boundary respectively.
7120 A value of t means point keeps its screen position if the scroll
7121 command moved it vertically out of the window, e.g. when scrolling
7123 Any other value means point always keeps its screen position.
7124 Scroll commands should have the `scroll-command' property
7125 on their symbols to be controlled by this variable. */);
7126 Vscroll_preserve_screen_position
= Qnil
;
7128 DEFVAR_LISP ("window-point-insertion-type", Vwindow_point_insertion_type
,
7129 doc
: /* Type of marker to use for `window-point'. */);
7130 Vwindow_point_insertion_type
= Qnil
;
7132 DEFVAR_LISP ("window-configuration-change-hook",
7133 Vwindow_configuration_change_hook
,
7134 doc
: /* Functions to call when window configuration changes.
7135 The buffer-local part is run once per window, with the relevant window
7136 selected; while the global part is run only once for the modified frame,
7137 with the relevant frame selected. */);
7138 Vwindow_configuration_change_hook
= Qnil
;
7140 DEFVAR_LISP ("recenter-redisplay", Vrecenter_redisplay
,
7141 doc
: /* If non-nil, then the `recenter' command with a nil argument
7142 will redraw the entire frame; the special value `tty' causes the
7143 frame to be redrawn only if it is a tty frame. */);
7144 Vrecenter_redisplay
= Qtty
;
7147 defsubr (&Sselected_window
);
7148 defsubr (&Sminibuffer_window
);
7149 defsubr (&Swindow_minibuffer_p
);
7150 defsubr (&Swindowp
);
7151 defsubr (&Swindow_live_p
);
7152 defsubr (&Spos_visible_in_window_p
);
7153 defsubr (&Swindow_line_height
);
7154 defsubr (&Swindow_buffer
);
7155 defsubr (&Swindow_height
);
7156 defsubr (&Swindow_width
);
7157 defsubr (&Swindow_full_width_p
);
7158 defsubr (&Swindow_hscroll
);
7159 defsubr (&Sset_window_hscroll
);
7160 defsubr (&Swindow_redisplay_end_trigger
);
7161 defsubr (&Sset_window_redisplay_end_trigger
);
7162 defsubr (&Swindow_edges
);
7163 defsubr (&Swindow_pixel_edges
);
7164 defsubr (&Swindow_absolute_pixel_edges
);
7165 defsubr (&Swindow_inside_edges
);
7166 defsubr (&Swindow_inside_pixel_edges
);
7167 defsubr (&Swindow_inside_absolute_pixel_edges
);
7168 defsubr (&Scoordinates_in_window_p
);
7169 defsubr (&Swindow_at
);
7170 defsubr (&Swindow_point
);
7171 defsubr (&Swindow_start
);
7172 defsubr (&Swindow_end
);
7173 defsubr (&Sset_window_point
);
7174 defsubr (&Sset_window_start
);
7175 defsubr (&Swindow_dedicated_p
);
7176 defsubr (&Sset_window_dedicated_p
);
7177 defsubr (&Swindow_display_table
);
7178 defsubr (&Sset_window_display_table
);
7179 defsubr (&Snext_window
);
7180 defsubr (&Sprevious_window
);
7181 defsubr (&Sother_window
);
7182 defsubr (&Sget_lru_window
);
7183 defsubr (&Swindow_use_time
);
7184 defsubr (&Sget_largest_window
);
7185 defsubr (&Sget_buffer_window
);
7186 defsubr (&Sdelete_other_windows
);
7187 defsubr (&Sdelete_windows_on
);
7188 defsubr (&Sreplace_buffer_in_windows
);
7189 defsubr (&Sdelete_window
);
7190 defsubr (&Sset_window_buffer
);
7191 defsubr (&Sselect_window
);
7192 defsubr (&Sforce_window_update
);
7193 defsubr (&Stemp_output_buffer_show
);
7194 defsubr (&Ssplit_window
);
7195 defsubr (&Senlarge_window
);
7196 defsubr (&Sshrink_window
);
7197 defsubr (&Sadjust_window_trailing_edge
);
7198 defsubr (&Sscroll_up
);
7199 defsubr (&Sscroll_down
);
7200 defsubr (&Sscroll_left
);
7201 defsubr (&Sscroll_right
);
7202 defsubr (&Sother_window_for_scrolling
);
7203 defsubr (&Sscroll_other_window
);
7204 defsubr (&Sminibuffer_selected_window
);
7205 defsubr (&Srecenter
);
7206 defsubr (&Swindow_text_height
);
7207 defsubr (&Smove_to_window_line
);
7208 defsubr (&Swindow_configuration_p
);
7209 defsubr (&Swindow_configuration_frame
);
7210 defsubr (&Sset_window_configuration
);
7211 defsubr (&Scurrent_window_configuration
);
7212 defsubr (&Swindow_tree
);
7213 defsubr (&Sset_window_margins
);
7214 defsubr (&Swindow_margins
);
7215 defsubr (&Sset_window_fringes
);
7216 defsubr (&Swindow_fringes
);
7217 defsubr (&Sset_window_scroll_bars
);
7218 defsubr (&Swindow_scroll_bars
);
7219 defsubr (&Swindow_vscroll
);
7220 defsubr (&Sset_window_vscroll
);
7221 defsubr (&Scompare_window_configurations
);
7222 defsubr (&Swindow_list
);
7223 defsubr (&Swindow_parameters
);
7224 defsubr (&Swindow_parameter
);
7225 defsubr (&Sset_window_parameter
);
7230 keys_of_window (void)
7232 initial_define_key (control_x_map
, '1', "delete-other-windows");
7233 initial_define_key (control_x_map
, '2', "split-window");
7234 initial_define_key (control_x_map
, '0', "delete-window");
7235 initial_define_key (control_x_map
, 'o', "other-window");
7236 initial_define_key (control_x_map
, '^', "enlarge-window");
7237 initial_define_key (control_x_map
, '<', "scroll-left");
7238 initial_define_key (control_x_map
, '>', "scroll-right");
7240 initial_define_key (global_map
, Ctl ('V'), "scroll-up-command");
7241 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
7242 initial_define_key (meta_map
, 'v', "scroll-down-command");