1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985,86,87,93,94,95,96,97,1998,2000
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 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
33 #include "dispextern.h"
34 #include "blockinput.h"
35 #include "intervals.h"
39 #endif /* HAVE_X_WINDOWS */
51 #define max(a, b) ((a) < (b) ? (b) : (a))
55 Lisp_Object Qwindowp
, Qwindow_live_p
, Qwindow_configuration_p
;
56 Lisp_Object Qwindow_size_fixed
, Qleft_bitmap_area
, Qright_bitmap_area
;
57 extern Lisp_Object Qheight
, Qwidth
;
59 static struct window
*decode_window
P_ ((Lisp_Object
));
60 static Lisp_Object select_window_1
P_ ((Lisp_Object
, int));
61 static int count_windows
P_ ((struct window
*));
62 static int get_leaf_windows
P_ ((struct window
*, struct window
**, int));
63 static void window_scroll
P_ ((Lisp_Object
, int, int, int));
64 static void window_scroll_pixel_based
P_ ((Lisp_Object
, int, int, int));
65 static void window_scroll_line_based
P_ ((Lisp_Object
, int, int, int));
66 static int window_min_size_1
P_ ((struct window
*, int));
67 static int window_min_size
P_ ((struct window
*, int, int, int *));
68 static void size_window
P_ ((Lisp_Object
, int, int, int));
69 static int freeze_window_start
P_ ((struct window
*, void *));
70 static int window_fixed_size_p
P_ ((struct window
*, int, int));
71 static void enlarge_window
P_ ((Lisp_Object
, int, int));
72 static Lisp_Object window_list
P_ ((void));
73 static int add_window_to_list
P_ ((struct window
*, void *));
74 static int candidate_window_p
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
,
76 static Lisp_Object next_window
P_ ((Lisp_Object
, Lisp_Object
,
78 static void decode_next_window_args
P_ ((Lisp_Object
*, Lisp_Object
*,
80 static int foreach_window_1
P_ ((struct window
*,
81 int (* fn
) (struct window
*, void *),
83 static Lisp_Object window_list_1
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
));
85 /* This is the window in which the terminal's cursor should
86 be left when nothing is being done with it. This must
87 always be a leaf window, and its buffer is selected by
88 the top level editing loop at the end of each command.
90 This value is always the same as
91 FRAME_SELECTED_WINDOW (selected_frame). */
93 Lisp_Object selected_window
;
95 /* A list of all windows for use by next_window and Fwindow_list.
96 Functions creating or deleting windows should invalidate this cache
97 by setting it to nil. */
99 Lisp_Object Vwindow_list
;
101 /* The mini-buffer window of the selected frame.
102 Note that you cannot test for mini-bufferness of an arbitrary window
103 by comparing against this; but you can test for mini-bufferness of
104 the selected window. */
106 Lisp_Object minibuf_window
;
108 /* Non-nil means it is the window for C-M-v to scroll
109 when the mini-buffer is selected. */
111 Lisp_Object Vminibuf_scroll_window
;
113 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
115 Lisp_Object Vother_window_scroll_buffer
;
117 /* Non-nil means it's function to call to display temp buffers. */
119 Lisp_Object Vtemp_buffer_show_function
;
121 /* If a window gets smaller than either of these, it is removed. */
123 int window_min_height
;
124 int window_min_width
;
126 /* Nonzero implies Fdisplay_buffer should create windows. */
130 /* Nonzero implies make new frames for Fdisplay_buffer. */
134 /* Nonzero means reuse existing frames for displaying buffers. */
136 int display_buffer_reuse_frames
;
138 /* Non-nil means use this function instead of default */
140 Lisp_Object Vpop_up_frame_function
;
142 /* Function to call to handle Fdisplay_buffer. */
144 Lisp_Object Vdisplay_buffer_function
;
146 /* Non-nil means that Fdisplay_buffer should even the heights of windows. */
148 Lisp_Object Veven_window_heights
;
150 /* List of buffer *names* for buffers that should have their own frames. */
152 Lisp_Object Vspecial_display_buffer_names
;
154 /* List of regexps for buffer names that should have their own frames. */
156 Lisp_Object Vspecial_display_regexps
;
158 /* Function to pop up a special frame. */
160 Lisp_Object Vspecial_display_function
;
162 /* List of buffer *names* for buffers to appear in selected window. */
164 Lisp_Object Vsame_window_buffer_names
;
166 /* List of regexps for buffer names to appear in selected window. */
168 Lisp_Object Vsame_window_regexps
;
170 /* Hook run at end of temp_output_buffer_show. */
172 Lisp_Object Qtemp_buffer_show_hook
;
174 /* Fdisplay_buffer always splits the largest window
175 if that window is more than this high. */
177 int split_height_threshold
;
179 /* Number of lines of continuity in scrolling by screenfuls. */
181 int next_screen_context_lines
;
183 /* Incremented for each window created. */
185 static int sequence_number
;
187 /* Nonzero after init_window_once has finished. */
189 static int window_initialized
;
191 /* Hook to run when window config changes. */
193 Lisp_Object Qwindow_configuration_change_hook
;
194 Lisp_Object Vwindow_configuration_change_hook
;
196 /* Nonzero means scroll commands try to put point
197 at the same screen height as previously. */
199 Lisp_Object Vscroll_preserve_screen_position
;
201 #if 0 /* This isn't used anywhere. */
202 /* Nonzero means we can split a frame even if it is "unsplittable". */
203 static int inhibit_frame_unsplittable
;
206 #define min(a, b) ((a) < (b) ? (a) : (b))
208 extern int scroll_margin
;
210 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
212 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
213 "Returns t if OBJECT is a window.")
217 return WINDOWP (object
) ? Qt
: Qnil
;
220 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
221 "Returns t if OBJECT is a window which is currently visible.")
225 return (WINDOWP (object
) && ! NILP (XWINDOW (object
)->buffer
) ? Qt
: Qnil
);
232 register struct window
*p
;
233 register struct Lisp_Vector
*vec
;
236 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct window
));
237 for (i
= 0; i
< VECSIZE (struct window
); i
++)
238 vec
->contents
[i
] = Qnil
;
239 vec
->size
= VECSIZE (struct window
);
240 p
= (struct window
*) vec
;
241 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
242 XSETFASTINT (p
->left
, 0);
243 XSETFASTINT (p
->top
, 0);
244 XSETFASTINT (p
->height
, 0);
245 XSETFASTINT (p
->width
, 0);
246 XSETFASTINT (p
->hscroll
, 0);
247 XSETFASTINT (p
->min_hscroll
, 0);
248 p
->orig_top
= p
->orig_height
= Qnil
;
249 p
->start
= Fmake_marker ();
250 p
->pointm
= Fmake_marker ();
251 XSETFASTINT (p
->use_time
, 0);
253 p
->display_table
= Qnil
;
255 p
->pseudo_window_p
= 0;
256 bzero (&p
->cursor
, sizeof (p
->cursor
));
257 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
258 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
259 p
->desired_matrix
= p
->current_matrix
= 0;
260 p
->phys_cursor_type
= -1;
261 p
->must_be_updated_p
= 0;
262 XSETFASTINT (p
->window_end_vpos
, 0);
263 XSETFASTINT (p
->window_end_pos
, 0);
264 p
->window_end_valid
= Qnil
;
267 XSETFASTINT (p
->last_point
, 0);
268 p
->frozen_window_start_p
= 0;
274 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
275 "Return the window that the cursor now appears in and commands apply to.")
278 return selected_window
;
281 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
282 "Return the window used now for minibuffers.\n\
283 If the optional argument FRAME is specified, return the minibuffer window\n\
284 used by that frame.")
289 frame
= selected_frame
;
290 CHECK_LIVE_FRAME (frame
, 0);
291 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
294 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
295 "Returns non-nil if WINDOW is a minibuffer window.")
299 struct window
*w
= decode_window (window
);
300 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
304 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
305 Spos_visible_in_window_p
, 0, 3, 0,
306 "Return t if position POS is currently on the frame in WINDOW.\n\
307 Return nil if that position is scrolled vertically out of view.\n\
308 If a character is only partially visible, nil is returned, unless the\n\
309 optional argument PARTIALLY is non-nil.\n\
310 POS defaults to point in WINDOW; WINDOW defaults to the selected window.")
311 (pos
, window
, partially
)
312 Lisp_Object pos
, window
, partially
;
314 register struct window
*w
;
316 register struct buffer
*buf
;
318 Lisp_Object in_window
;
321 w
= decode_window (window
);
322 buf
= XBUFFER (w
->buffer
);
323 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
327 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
330 else if (w
== XWINDOW (selected_window
))
333 posint
= XMARKER (w
->pointm
)->charpos
;
335 /* If position is above window start, it's not visible. */
336 if (posint
< CHARPOS (top
))
338 else if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
)
339 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (buf
)
340 && posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
))
342 /* If frame is up-to-date, and POSINT is < window end pos, use
343 that info. This doesn't work for POSINT == end pos, because
344 the window end pos is actually the position _after_ the last
345 char in the window. */
346 if (NILP (partially
))
348 pos_visible_p (w
, posint
, &fully_p
, NILP (partially
));
349 in_window
= fully_p
? Qt
: Qnil
;
354 else if (posint
> BUF_ZV (buf
))
356 else if (CHARPOS (top
) < BUF_BEGV (buf
) || CHARPOS (top
) > BUF_ZV (buf
))
357 /* If window start is out of range, do something reasonable. */
361 if (pos_visible_p (w
, posint
, &fully_p
, NILP (partially
)))
362 in_window
= !NILP (partially
) || fully_p
? Qt
: Qnil
;
371 static struct window
*
372 decode_window (window
)
373 register Lisp_Object window
;
376 return XWINDOW (selected_window
);
378 CHECK_LIVE_WINDOW (window
, 0);
379 return XWINDOW (window
);
382 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
383 "Return the buffer that WINDOW is displaying.")
387 return decode_window (window
)->buffer
;
390 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
391 "Return the number of lines in WINDOW (including its mode line).")
395 return decode_window (window
)->height
;
398 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
399 "Return the number of display columns in WINDOW.\n\
400 This is the width that is usable columns available for text in WINDOW.\n\
401 If you want to find out how many columns WINDOW takes up,\n\
402 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))).")
406 return make_number (window_internal_width (decode_window (window
)));
409 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
410 "Return the number of columns by which WINDOW is scrolled from left margin.")
414 return decode_window (window
)->hscroll
;
417 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
418 "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\
419 NCOL should be zero or positive.")
421 Lisp_Object window
, ncol
;
423 struct window
*w
= decode_window (window
);
426 CHECK_NUMBER (ncol
, 1);
427 hscroll
= max (0, XINT (ncol
));
429 /* Prevent redisplay shortcuts when changing the hscroll. */
430 if (XINT (w
->hscroll
) != hscroll
)
431 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
433 w
->hscroll
= w
->min_hscroll
= make_number (hscroll
);
437 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
438 Swindow_redisplay_end_trigger
, 0, 1, 0,
439 "Return WINDOW's redisplay end trigger value.\n\
440 See `set-window-redisplay-end-trigger' for more information.")
444 return decode_window (window
)->redisplay_end_trigger
;
447 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
448 Sset_window_redisplay_end_trigger
, 2, 2, 0,
449 "Set WINDOW's redisplay end trigger value to VALUE.\n\
450 VALUE should be a buffer position (typically a marker) or nil.\n\
451 If it is a buffer position, then if redisplay in WINDOW reaches a position\n\
452 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called\n\
453 with two arguments: WINDOW, and the end trigger value.\n\
454 Afterwards the end-trigger value is reset to nil.")
456 register Lisp_Object window
, value
;
458 register struct window
*w
;
460 w
= decode_window (window
);
461 w
->redisplay_end_trigger
= value
;
465 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
466 "Return a list of the edge coordinates of WINDOW.\n\
467 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\
468 RIGHT is one more than the rightmost column used by WINDOW,\n\
469 and BOTTOM is one more than the bottommost row used by WINDOW\n\
474 register struct window
*w
= decode_window (window
);
476 return Fcons (w
->left
, Fcons (w
->top
,
477 Fcons (make_number (WINDOW_RIGHT_EDGE (w
)),
478 Fcons (make_number (XFASTINT (w
->top
)
479 + XFASTINT (w
->height
)),
483 /* Test if the character at column *X, row *Y is within window W.
484 If it is not, return 0;
485 if it is in the window's text area,
486 set *x and *y to its location relative to the upper left corner
489 if it is on the window's modeline, return 2;
490 if it is on the border between the window and its right sibling,
492 if it is on the window's top line, return 4;
493 if it is in the bitmap area to the left/right of the window,
494 return 5 or 6, and convert *X and *Y to window-relative corrdinates.
496 X and Y are frame relative pixel coordinates. */
499 coordinates_in_window (w
, x
, y
)
500 register struct window
*w
;
503 /* Let's make this a global enum later, instead of using numbers
505 enum {ON_NOTHING
, ON_TEXT
, ON_MODE_LINE
, ON_VERTICAL_BORDER
,
506 ON_HEADER_LINE
, ON_LEFT_FRINGE
, ON_RIGHT_FRINGE
};
508 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
509 int left_x
, right_x
, top_y
, bottom_y
;
510 int flags_area_width
= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
512 int ux
= CANON_X_UNIT (f
), uy
= CANON_Y_UNIT (f
);
513 int x0
= XFASTINT (w
->left
) * ux
;
514 int x1
= x0
+ XFASTINT (w
->width
) * ux
;
516 if (*x
< x0
|| *x
>= x1
)
519 /* In what's below, we subtract 1 when computing right_x because we
520 want the rightmost pixel, which is given by left_pixel+width-1. */
521 if (w
->pseudo_window_p
)
524 right_x
= XFASTINT (w
->width
) * CANON_X_UNIT (f
) - 1;
525 top_y
= WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
);
526 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
530 left_x
= (WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X (w
)
531 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
532 right_x
= WINDOW_DISPLAY_RIGHT_EDGE_PIXEL_X (w
) - 1;
533 top_y
= (WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
)
534 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
535 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
538 /* On the mode line or header line? If it's near the start of
539 the mode or header line of window that's has a horizontal
540 sibling, say it's on the vertical line. That's to be able
541 to resize windows horizontally in case we're using toolkit
544 if (WINDOW_WANTS_MODELINE_P (w
)
545 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
)
548 /* We're somewhere on the mode line. We consider the place
549 between mode lines of horizontally adjacent mode lines
550 as the vertical border. If scroll bars on the left,
551 return the right window. */
554 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
556 if (abs (*x
- x0
) < ux
/ 2)
557 part
= ON_VERTICAL_BORDER
;
559 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < ux
/ 2)
560 part
= ON_VERTICAL_BORDER
;
562 else if (WINDOW_WANTS_HEADER_LINE_P (w
)
563 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
)
566 part
= ON_HEADER_LINE
;
568 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
570 if (abs (*x
- x0
) < ux
/ 2)
571 part
= ON_VERTICAL_BORDER
;
573 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < ux
/ 2)
574 part
= ON_VERTICAL_BORDER
;
576 /* Outside anything interesting? */
581 - FRAME_LEFT_SCROLL_BAR_WIDTH (f
) * ux
)
582 || *x
> right_x
+ flags_area_width
)
586 else if (FRAME_WINDOW_P (f
))
588 if (!w
->pseudo_window_p
589 && !FRAME_HAS_VERTICAL_SCROLL_BARS (f
)
590 && !WINDOW_RIGHTMOST_P (w
)
591 && (abs (*x
- right_x
- flags_area_width
) < ux
/ 2))
593 part
= ON_VERTICAL_BORDER
;
595 else if (*x
< left_x
|| *x
> right_x
)
597 /* Other lines than the mode line don't include flags areas and
598 scroll bars on the left. */
600 /* Convert X and Y to window-relative pixel coordinates. */
603 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
614 /* Need to say "*x > right_x" rather than >=, since on character
615 terminals, the vertical line's x coordinate is right_x. */
616 if (*x
< left_x
|| *x
> right_x
)
618 /* Other lines than the mode line don't include flags areas and
619 scroll bars on the left. */
621 /* Convert X and Y to window-relative pixel coordinates. */
624 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
626 /* Here, too, "*x > right_x" is because of character terminals. */
627 else if (!w
->pseudo_window_p
628 && !WINDOW_RIGHTMOST_P (w
)
629 && *x
> right_x
- ux
)
631 /* On the border on the right side of the window? Assume that
632 this area begins at RIGHT_X minus a canonical char width. */
633 part
= ON_VERTICAL_BORDER
;
637 /* Convert X and Y to window-relative pixel coordinates. */
648 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
649 Scoordinates_in_window_p
, 2, 2, 0,
650 "Return non-nil if COORDINATES are in WINDOW.\n\
651 COORDINATES is a cons of the form (X . Y), X and Y being distances\n\
652 measured in characters from the upper-left corner of the frame.\n\
653 (0 . 0) denotes the character in the upper left corner of the\n\
655 If COORDINATES are in the text portion of WINDOW,\n\
656 the coordinates relative to the window are returned.\n\
657 If they are in the mode line of WINDOW, `mode-line' is returned.\n\
658 If they are in the top mode line of WINDOW, `header-line' is returned.\n\
659 If they are in the bitmap-area to the left of the window,\n\
660 `left-bitmap-area' is returned, if they are in the area on the right of\n\
661 the window, `right-bitmap-area' is returned.\n\
662 If they are on the border between WINDOW and its right sibling,\n\
663 `vertical-line' is returned.")
664 (coordinates
, window
)
665 register Lisp_Object coordinates
, window
;
672 CHECK_LIVE_WINDOW (window
, 0);
673 w
= XWINDOW (window
);
674 f
= XFRAME (w
->frame
);
675 CHECK_CONS (coordinates
, 1);
676 lx
= Fcar (coordinates
);
677 ly
= Fcdr (coordinates
);
678 CHECK_NUMBER_OR_FLOAT (lx
, 1);
679 CHECK_NUMBER_OR_FLOAT (ly
, 1);
680 x
= PIXEL_X_FROM_CANON_X (f
, lx
);
681 y
= PIXEL_Y_FROM_CANON_Y (f
, ly
);
683 switch (coordinates_in_window (w
, &x
, &y
))
685 case 0: /* NOT in window at all. */
688 case 1: /* In text part of window. */
689 /* X and Y are now window relative pixel coordinates.
690 Convert them to canonical char units before returning
692 return Fcons (CANON_X_FROM_PIXEL_X (f
, x
),
693 CANON_Y_FROM_PIXEL_Y (f
, y
));
695 case 2: /* In mode line of window. */
698 case 3: /* On right border of window. */
699 return Qvertical_line
;
705 return Qleft_bitmap_area
;
708 return Qright_bitmap_area
;
716 /* Callback for foreach_window, used in window_from_coordinates.
717 Check if window W contains coordinates specified by USER_DATA which
718 is actually a pointer to a struct check_window_data CW.
720 Check if window W contains coordinates *CW->x and *CW->y. If it
721 does, return W in *CW->window, as Lisp_Object, and return in
722 *CW->part the part of the window under coordinates *X,*Y. Return
723 zero from this function to stop iterating over windows. */
725 struct check_window_data
732 check_window_containing (w
, user_data
)
736 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
739 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
742 *cw
->part
= found
- 1;
743 XSETWINDOW (*cw
->window
, w
);
750 /* Find the window containing frame-relative pixel position X/Y and
751 return it as a Lisp_Object. If X, Y is on the window's modeline,
752 set *PART to 1; if it is on the separating line between the window
753 and its right sibling, set it to 2; otherwise set it to 0. If
754 there is no window under X, Y return nil and leave *PART
755 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
757 This function was previously implemented with a loop cycling over
758 windows with Fnext_window, and starting with the frame's selected
759 window. It turned out that this doesn't work with an
760 implementation of next_window using Vwindow_list, because
761 FRAME_SELECTED_WINDOW (F) is not always contained in the window
762 tree of F when this function is called asynchronously from
763 note_mouse_highlight. The original loop didn't terminate in this
767 window_from_coordinates (f
, x
, y
, part
, tool_bar_p
)
774 struct check_window_data cw
;
777 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
778 foreach_window (f
, check_window_containing
, &cw
);
780 /* If not found above, see if it's in the tool bar window, if a tool
784 && WINDOWP (f
->tool_bar_window
)
785 && XINT (XWINDOW (f
->tool_bar_window
)->height
) > 0
786 && coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
))
789 window
= f
->tool_bar_window
;
795 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
796 "Return window containing coordinates X and Y on FRAME.\n\
797 If omitted, FRAME defaults to the currently selected frame.\n\
798 The top left corner of the frame is considered to be row 0,\n\
801 Lisp_Object x
, y
, frame
;
807 frame
= selected_frame
;
808 CHECK_LIVE_FRAME (frame
, 2);
811 /* Check that arguments are integers or floats. */
812 CHECK_NUMBER_OR_FLOAT (x
, 0);
813 CHECK_NUMBER_OR_FLOAT (y
, 1);
815 return window_from_coordinates (f
,
816 PIXEL_X_FROM_CANON_X (f
, x
),
817 PIXEL_Y_FROM_CANON_Y (f
, y
),
821 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
822 "Return current value of point in WINDOW.\n\
823 For a nonselected window, this is the value point would have\n\
824 if that window were selected.\n\
826 Note that, when WINDOW is the selected window and its buffer\n\
827 is also currently selected, the value returned is the same as (point).\n\
828 It would be more strictly correct to return the `top-level' value\n\
829 of point, outside of any save-excursion forms.\n\
830 But that is hard to define.")
834 register struct window
*w
= decode_window (window
);
836 if (w
== XWINDOW (selected_window
)
837 && current_buffer
== XBUFFER (w
->buffer
))
839 return Fmarker_position (w
->pointm
);
842 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
843 "Return position at which display currently starts in WINDOW.\n\
844 This is updated by redisplay or by calling `set-window-start'.")
848 return Fmarker_position (decode_window (window
)->start
);
851 /* This is text temporarily removed from the doc string below.
853 This function returns nil if the position is not currently known.\n\
854 That happens when redisplay is preempted and doesn't finish.\n\
855 If in that case you want to compute where the end of the window would\n\
856 have been if redisplay had finished, do this:\n\
858 (goto-char (window-start window))\n\
859 (vertical-motion (1- (window-height window)) window)\n\
862 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
863 "Return position at which display currently ends in WINDOW.\n\
864 This is updated by redisplay, when it runs to completion.\n\
865 Simply changing the buffer text or setting `window-start'\n\
866 does not update this value.\n\
867 If UP-TO-DATE is non-nil, compute the up-to-date position\n\
868 if it isn't already recorded.")
870 Lisp_Object window
, update
;
873 struct window
*w
= decode_window (window
);
877 CHECK_BUFFER (buf
, 0);
879 #if 0 /* This change broke some things. We should make it later. */
880 /* If we don't know the end position, return nil.
881 The user can compute it with vertical-motion if he wants to.
882 It would be nicer to do it automatically,
883 but that's so slow that it would probably bother people. */
884 if (NILP (w
->window_end_valid
))
889 && ! (! NILP (w
->window_end_valid
)
890 && XFASTINT (w
->last_modified
) >= MODIFF
))
892 struct text_pos startp
;
895 /* In case W->start is out of the range, use something
896 reasonable. This situation occured when loading a file with
897 `-l' containing a call to `rmail' with subsequent other
898 commands. At the end, W->start happened to be BEG, while
899 rmail had already narrowed the buffer. */
900 if (XMARKER (w
->start
)->charpos
< BEGV
)
901 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
902 else if (XMARKER (w
->start
)->charpos
> ZV
)
903 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
905 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
907 /* Cannot use Fvertical_motion because that function doesn't
908 cope with variable-height lines. */
909 start_display (&it
, w
, startp
);
910 move_it_vertically (&it
, window_box_height (w
));
911 value
= make_number (IT_CHARPOS (it
));
914 XSETINT (value
, BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
919 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
920 "Make point value in WINDOW be at position POS in WINDOW's buffer.")
922 Lisp_Object window
, pos
;
924 register struct window
*w
= decode_window (window
);
926 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
927 if (w
== XWINDOW (selected_window
)
928 && XBUFFER (w
->buffer
) == current_buffer
)
931 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
933 /* We have to make sure that redisplay updates the window to show
934 the new value of point. */
935 if (!EQ (window
, selected_window
))
936 ++windows_or_buffers_changed
;
941 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
942 "Make display in WINDOW start at position POS in WINDOW's buffer.\n\
943 Optional third arg NOFORCE non-nil inhibits next redisplay\n\
944 from overriding motion of point in order to display at this exact start.")
945 (window
, pos
, noforce
)
946 Lisp_Object window
, pos
, noforce
;
948 register struct window
*w
= decode_window (window
);
950 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
951 set_marker_restricted (w
->start
, pos
, w
->buffer
);
952 /* this is not right, but much easier than doing what is right. */
953 w
->start_at_line_beg
= Qnil
;
956 w
->update_mode_line
= Qt
;
957 XSETFASTINT (w
->last_modified
, 0);
958 XSETFASTINT (w
->last_overlay_modified
, 0);
959 if (!EQ (window
, selected_window
))
960 windows_or_buffers_changed
++;
965 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
967 "Return WINDOW's dedicated object, usually t or nil.\n\
968 See also `set-window-dedicated-p'.")
972 return decode_window (window
)->dedicated
;
975 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
976 Sset_window_dedicated_p
, 2, 2, 0,
977 "Control whether WINDOW is dedicated to the buffer it displays.\n\
978 If it is dedicated, Emacs will not automatically change\n\
979 which buffer appears in it.\n\
980 The second argument is the new value for the dedication flag;\n\
983 Lisp_Object window
, arg
;
985 register struct window
*w
= decode_window (window
);
995 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
997 "Return the display-table that WINDOW is using.")
1001 return decode_window (window
)->display_table
;
1004 /* Get the display table for use on window W. This is either W's
1005 display table or W's buffer's display table. Ignore the specified
1006 tables if they are not valid; if no valid table is specified,
1009 struct Lisp_Char_Table
*
1010 window_display_table (w
)
1013 struct Lisp_Char_Table
*dp
= NULL
;
1015 if (DISP_TABLE_P (w
->display_table
))
1016 dp
= XCHAR_TABLE (w
->display_table
);
1017 else if (BUFFERP (w
->buffer
))
1019 struct buffer
*b
= XBUFFER (w
->buffer
);
1021 if (DISP_TABLE_P (b
->display_table
))
1022 dp
= XCHAR_TABLE (b
->display_table
);
1023 else if (DISP_TABLE_P (Vstandard_display_table
))
1024 dp
= XCHAR_TABLE (Vstandard_display_table
);
1030 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1031 "Set WINDOW's display-table to TABLE.")
1033 register Lisp_Object window
, table
;
1035 register struct window
*w
;
1037 w
= decode_window (window
);
1038 w
->display_table
= table
;
1042 /* Record info on buffer window w is displaying
1043 when it is about to cease to display that buffer. */
1046 register struct window
*w
;
1053 if (b
!= XMARKER (w
->pointm
)->buffer
)
1057 if (w
== XWINDOW (selected_window
)
1058 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1059 /* Do this except when the selected window's buffer
1060 is being removed from some other window. */
1062 /* last_window_start records the start position that this buffer
1063 had in the last window to be disconnected from it.
1064 Now that this statement is unconditional,
1065 it is possible for the buffer to be displayed in the
1066 selected window, while last_window_start reflects another
1067 window which was recently showing the same buffer.
1068 Some people might say that might be a good thing. Let's see. */
1069 b
->last_window_start
= marker_position (w
->start
);
1071 /* Point in the selected window's buffer
1072 is actually stored in that buffer, and the window's pointm isn't used.
1073 So don't clobber point in that buffer. */
1074 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1075 /* This line helps to fix Horsley's testbug.el bug. */
1076 && !(WINDOWP (b
->last_selected_window
)
1077 && w
!= XWINDOW (b
->last_selected_window
)
1078 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1079 temp_set_point_both (b
,
1080 clip_to_bounds (BUF_BEGV (b
),
1081 XMARKER (w
->pointm
)->charpos
,
1083 clip_to_bounds (BUF_BEGV_BYTE (b
),
1084 marker_byte_position (w
->pointm
),
1087 if (WINDOWP (b
->last_selected_window
)
1088 && w
== XWINDOW (b
->last_selected_window
))
1089 b
->last_selected_window
= Qnil
;
1092 /* Put replacement into the window structure in place of old. */
1094 replace_window (old
, replacement
)
1095 Lisp_Object old
, replacement
;
1097 register Lisp_Object tem
;
1098 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1100 /* If OLD is its frame's root_window, then replacement is the new
1101 root_window for that frame. */
1103 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1104 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1108 p
->width
= o
->width
;
1109 p
->height
= o
->height
;
1110 p
->desired_matrix
= p
->current_matrix
= 0;
1112 bzero (&p
->cursor
, sizeof (p
->cursor
));
1113 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1114 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1115 p
->phys_cursor_type
= -1;
1116 p
->must_be_updated_p
= 0;
1117 p
->pseudo_window_p
= 0;
1118 XSETFASTINT (p
->window_end_vpos
, 0);
1119 XSETFASTINT (p
->window_end_pos
, 0);
1120 p
->window_end_valid
= Qnil
;
1121 p
->frozen_window_start_p
= 0;
1122 p
->orig_top
= p
->orig_height
= Qnil
;
1124 p
->next
= tem
= o
->next
;
1126 XWINDOW (tem
)->prev
= replacement
;
1128 p
->prev
= tem
= o
->prev
;
1130 XWINDOW (tem
)->next
= replacement
;
1132 p
->parent
= tem
= o
->parent
;
1135 if (EQ (XWINDOW (tem
)->vchild
, old
))
1136 XWINDOW (tem
)->vchild
= replacement
;
1137 if (EQ (XWINDOW (tem
)->hchild
, old
))
1138 XWINDOW (tem
)->hchild
= replacement
;
1141 /*** Here, if replacement is a vertical combination
1142 and so is its new parent, we should make replacement's
1143 children be children of that parent instead. ***/
1146 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1147 "Remove WINDOW from the display. Default is selected window.")
1149 register Lisp_Object window
;
1151 delete_window (window
);
1153 if (! NILP (Vwindow_configuration_change_hook
)
1154 && ! NILP (Vrun_hooks
))
1155 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1161 delete_window (window
)
1162 register Lisp_Object window
;
1164 register Lisp_Object tem
, parent
, sib
;
1165 register struct window
*p
;
1166 register struct window
*par
;
1169 /* Because this function is called by other C code on non-leaf
1170 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1171 so we can't decode_window here. */
1173 window
= selected_window
;
1175 CHECK_WINDOW (window
, 0);
1176 p
= XWINDOW (window
);
1178 /* It's okay to delete an already-deleted window. */
1179 if (NILP (p
->buffer
)
1181 && NILP (p
->vchild
))
1186 error ("Attempt to delete minibuffer or sole ordinary window");
1187 par
= XWINDOW (parent
);
1189 windows_or_buffers_changed
++;
1190 Vwindow_list
= Qnil
;
1191 frame
= XFRAME (WINDOW_FRAME (p
));
1192 FRAME_WINDOW_SIZES_CHANGED (frame
) = 1;
1194 /* Are we trying to delete any frame's selected window? */
1196 Lisp_Object frame
, pwindow
;
1198 /* See if the frame's selected window is either WINDOW
1199 or any subwindow of it, by finding all that window's parents
1200 and comparing each one with WINDOW. */
1201 frame
= WINDOW_FRAME (XWINDOW (window
));
1202 pwindow
= FRAME_SELECTED_WINDOW (XFRAME (frame
));
1204 while (!NILP (pwindow
))
1206 if (EQ (window
, pwindow
))
1208 pwindow
= XWINDOW (pwindow
)->parent
;
1211 if (EQ (window
, pwindow
))
1213 Lisp_Object alternative
;
1214 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
1216 /* If we're about to delete the selected window on the
1217 selected frame, then we should use Fselect_window to select
1218 the new window. On the other hand, if we're about to
1219 delete the selected window on any other frame, we shouldn't do
1220 anything but set the frame's selected_window slot. */
1221 if (EQ (window
, selected_window
))
1222 Fselect_window (alternative
);
1224 FRAME_SELECTED_WINDOW (XFRAME (frame
)) = alternative
;
1229 /* tem is null for dummy parent windows
1230 (which have inferiors but not any contents themselves) */
1234 unchain_marker (p
->pointm
);
1235 unchain_marker (p
->start
);
1238 /* Free window glyph matrices. It is sure that they are allocated
1239 again when ADJUST_GLYPHS is called. Block input so that expose
1240 events and other events that access glyph matrices are not
1241 processed while we are changing them. */
1243 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (frame
)));
1247 XWINDOW (tem
)->prev
= p
->prev
;
1251 XWINDOW (tem
)->next
= p
->next
;
1253 if (EQ (window
, par
->hchild
))
1254 par
->hchild
= p
->next
;
1255 if (EQ (window
, par
->vchild
))
1256 par
->vchild
= p
->next
;
1258 /* Find one of our siblings to give our space to. */
1262 /* If p gives its space to its next sibling, that sibling needs
1263 to have its top/left side pulled back to where p's is.
1264 set_window_{height,width} will re-position the sibling's
1267 XWINDOW (sib
)->top
= p
->top
;
1268 XWINDOW (sib
)->left
= p
->left
;
1271 /* Stretch that sibling. */
1272 if (!NILP (par
->vchild
))
1273 set_window_height (sib
,
1274 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
1276 if (!NILP (par
->hchild
))
1277 set_window_width (sib
,
1278 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
1281 /* If parent now has only one child,
1282 put the child into the parent's place. */
1286 if (NILP (XWINDOW (tem
)->next
))
1287 replace_window (parent
, tem
);
1289 /* Since we may be deleting combination windows, we must make sure that
1290 not only p but all its children have been marked as deleted. */
1291 if (! NILP (p
->hchild
))
1292 delete_all_subwindows (XWINDOW (p
->hchild
));
1293 else if (! NILP (p
->vchild
))
1294 delete_all_subwindows (XWINDOW (p
->vchild
));
1296 /* Mark this window as deleted. */
1297 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1299 /* Adjust glyph matrices. */
1300 adjust_glyphs (frame
);
1306 /***********************************************************************
1308 ***********************************************************************/
1310 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1311 pointer. This is a callback function for foreach_window, used in
1312 function window_list. */
1315 add_window_to_list (w
, user_data
)
1319 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1321 XSETWINDOW (window
, w
);
1322 *list
= Fcons (window
, *list
);
1327 /* Return a list of all windows, for use by next_window. If
1328 Vwindow_list is a list, return that list. Otherwise, build a new
1329 list, cache it in Vwindow_list, and return that. */
1334 if (!CONSP (Vwindow_list
))
1338 Vwindow_list
= Qnil
;
1339 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1341 Lisp_Object args
[2];
1343 /* We are visiting windows in canonical order, and add
1344 new windows at the front of args[1], which means we
1345 have to reverse this list at the end. */
1347 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1348 args
[0] = Vwindow_list
;
1349 args
[1] = Fnreverse (args
[1]);
1350 Vwindow_list
= Fnconc (2, args
);
1354 return Vwindow_list
;
1358 /* Value is non-zero if WINDOW satisfies the constraints given by
1359 OWINDOW, MINIBUF and ALL_FRAMES.
1361 MINIBUF t means WINDOW may be minibuffer windows.
1362 `lambda' means WINDOW may not be a minibuffer window.
1363 a window means a specific minibuffer window
1365 ALL_FRAMES t means search all frames,
1366 nil means search just current frame,
1367 `visible' means search just visible frames,
1368 0 means search visible and iconified frames,
1369 a window means search the frame that window belongs to,
1370 a frame means consider windows on that frame, only. */
1373 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1374 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1376 struct window
*w
= XWINDOW (window
);
1377 struct frame
*f
= XFRAME (w
->frame
);
1378 int candidate_p
= 1;
1380 if (!BUFFERP (w
->buffer
))
1382 else if (MINI_WINDOW_P (w
)
1383 && (EQ (minibuf
, Qlambda
)
1384 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1386 /* If MINIBUF is `lambda' don't consider any mini-windows.
1387 If it is a window, consider only that one. */
1390 else if (EQ (all_frames
, Qt
))
1392 else if (NILP (all_frames
))
1394 xassert (WINDOWP (owindow
));
1395 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1397 else if (EQ (all_frames
, Qvisible
))
1399 FRAME_SAMPLE_VISIBILITY (f
);
1400 candidate_p
= FRAME_VISIBLE_P (f
);
1402 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1404 FRAME_SAMPLE_VISIBILITY (f
);
1405 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1407 else if (WINDOWP (all_frames
))
1408 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1409 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1410 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1411 else if (FRAMEP (all_frames
))
1412 candidate_p
= EQ (all_frames
, w
->frame
);
1418 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1419 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1423 decode_next_window_args (window
, minibuf
, all_frames
)
1424 Lisp_Object
*window
, *minibuf
, *all_frames
;
1427 *window
= selected_window
;
1429 CHECK_LIVE_WINDOW (*window
, 0);
1431 /* MINIBUF nil may or may not include minibuffers. Decide if it
1433 if (NILP (*minibuf
))
1434 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1435 else if (!EQ (*minibuf
, Qt
))
1438 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1439 => count none of them, or a specific minibuffer window (the
1440 active one) to count. */
1442 /* ALL_FRAMES nil doesn't specify which frames to include. */
1443 if (NILP (*all_frames
))
1444 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1445 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1447 else if (EQ (*all_frames
, Qvisible
))
1449 else if (XFASTINT (*all_frames
) == 0)
1451 else if (FRAMEP (*all_frames
))
1453 else if (!EQ (*all_frames
, Qt
))
1456 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1457 search just current frame, `visible' meaning search just visible
1458 frames, 0 meaning search visible and iconified frames, or a
1459 window, meaning search the frame that window belongs to, or a
1460 frame, meaning consider windows on that frame, only. */
1464 /* Return the next or previous window of WINDOW in canonical ordering
1465 of windows. NEXT_P non-zero means return the next window. See the
1466 documentation string of next-window for the meaning of MINIBUF and
1470 next_window (window
, minibuf
, all_frames
, next_p
)
1471 Lisp_Object window
, minibuf
, all_frames
;
1474 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1476 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1477 return the first window on the frame. */
1478 if (FRAMEP (all_frames
)
1479 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1480 return Fframe_first_window (all_frames
);
1486 /* Find WINDOW in the list of all windows. */
1487 list
= Fmemq (window
, window_list ());
1489 /* Scan forward from WINDOW to the end of the window list. */
1491 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1492 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1495 /* Scan from the start of the window list up to WINDOW. */
1497 for (list
= Vwindow_list
;
1498 CONSP (list
) && !EQ (XCAR (list
), window
);
1500 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1504 window
= XCAR (list
);
1508 Lisp_Object candidate
, list
;
1510 /* Scan through the list of windows for candidates. If there are
1511 candidate windows in front of WINDOW, the last one of these
1512 is the one we want. If there are candidates following WINDOW
1513 in the list, again the last one of these is the one we want. */
1515 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1517 if (EQ (XCAR (list
), window
))
1519 if (WINDOWP (candidate
))
1522 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1524 candidate
= XCAR (list
);
1527 if (WINDOWP (candidate
))
1535 /* This comment supplies the doc string for `next-window',
1536 for make-docfile to see. We cannot put this in the real DEFUN
1537 due to limits in the Unix cpp.
1539 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
1540 "Return next window after WINDOW in canonical ordering of windows.\n\
1541 If omitted, WINDOW defaults to the selected window.\n\
1543 Optional second arg MINIBUF t means count the minibuffer window even\n\
1544 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1545 it is active. MINIBUF neither t nor nil means not to count the\n\
1546 minibuffer even if it is active.\n\
1548 Several frames may share a single minibuffer; if the minibuffer\n\
1549 counts, all windows on all frames that share that minibuffer count\n\
1550 too. Therefore, `next-window' can be used to iterate through the\n\
1551 set of windows even when the minibuffer is on another frame. If the\n\
1552 minibuffer does not count, only windows from WINDOW's frame count.\n\
1554 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1555 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1556 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1557 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1558 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1559 Anything else means restrict to WINDOW's frame.\n\
1561 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1562 `next-window' to iterate through the entire cycle of acceptable\n\
1563 windows, eventually ending up back at the window you started with.\n\
1564 `previous-window' traverses the same cycle, in the reverse order.")
1565 (window, minibuf, all_frames) */
1567 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1569 (window
, minibuf
, all_frames
)
1570 Lisp_Object window
, minibuf
, all_frames
;
1572 return next_window (window
, minibuf
, all_frames
, 1);
1576 /* This comment supplies the doc string for `previous-window',
1577 for make-docfile to see. We cannot put this in the real DEFUN
1578 due to limits in the Unix cpp.
1580 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
1581 "Return the window preceding WINDOW in canonical ordering of windows.\n\
1582 If omitted, WINDOW defaults to the selected window.\n\
1584 Optional second arg MINIBUF t means count the minibuffer window even\n\
1585 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1586 it is active. MINIBUF neither t nor nil means not to count the\n\
1587 minibuffer even if it is active.\n\
1589 Several frames may share a single minibuffer; if the minibuffer\n\
1590 counts, all windows on all frames that share that minibuffer count\n\
1591 too. Therefore, `previous-window' can be used to iterate through\n\
1592 the set of windows even when the minibuffer is on another frame. If\n\
1593 the minibuffer does not count, only windows from WINDOW's frame count\n\
1595 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1596 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1597 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1598 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1599 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1600 Anything else means restrict to WINDOW's frame.\n\
1602 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1603 `previous-window' to iterate through the entire cycle of acceptable\n\
1604 windows, eventually ending up back at the window you started with.\n\
1605 `next-window' traverses the same cycle, in the reverse order.")
1606 (window, minibuf, all_frames) */
1609 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1611 (window
, minibuf
, all_frames
)
1612 Lisp_Object window
, minibuf
, all_frames
;
1614 return next_window (window
, minibuf
, all_frames
, 0);
1618 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1619 "Select the ARG'th different window on this frame.\n\
1620 All windows on current frame are arranged in a cyclic order.\n\
1621 This command selects the window ARG steps away in that order.\n\
1622 A negative ARG moves in the opposite order. If the optional second\n\
1623 argument ALL_FRAMES is non-nil, cycle through all frames.")
1625 Lisp_Object arg
, all_frames
;
1630 CHECK_NUMBER (arg
, 0);
1631 window
= selected_window
;
1633 for (i
= XINT (arg
); i
> 0; --i
)
1634 window
= Fnext_window (window
, Qnil
, all_frames
);
1636 window
= Fprevious_window (window
, Qnil
, all_frames
);
1638 Fselect_window (window
);
1643 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1644 "Return a list of windows on FRAME, starting with WINDOW.\n\
1645 FRAME nil or omitted means use the selected frame.\n\
1646 WINDOW nil or omitted means use the selected window.\n\
1647 MINIBUF t means include the minibuffer window, even if it isn't active.\n\
1648 MINIBUF nil or omitted means include the minibuffer window only\n\
1650 MINIBUF neither nil nor t means never include the minibuffer window.")
1651 (frame
, minibuf
, window
)
1652 Lisp_Object frame
, minibuf
, window
;
1656 window
= selected_window
;
1658 frame
= selected_frame
;
1660 if (!EQ (frame
, XWINDOW (window
)->frame
))
1661 error ("Window is on a different frame");
1663 return window_list_1 (window
, minibuf
, frame
);
1667 /* Return a list of windows in canonical ordering. Arguments are like
1668 for `next-window'. */
1671 window_list_1 (window
, minibuf
, all_frames
)
1672 Lisp_Object window
, minibuf
, all_frames
;
1674 Lisp_Object tail
, list
;
1676 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1679 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1680 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1681 list
= Fcons (XCAR (tail
), list
);
1683 return Fnreverse (list
);
1688 /* Look at all windows, performing an operation specified by TYPE
1690 If FRAMES is Qt, look at all frames;
1691 Qnil, look at just the selected frame;
1692 Qvisible, look at visible frames;
1693 a frame, just look at windows on that frame.
1694 If MINI is non-zero, perform the operation on minibuffer windows too.
1700 GET_BUFFER_WINDOW
, /* Arg is buffer */
1701 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1702 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1703 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1705 UNSHOW_BUFFER
, /* Arg is buffer */
1710 window_loop (type
, obj
, mini
, frames
)
1711 enum window_loop type
;
1712 Lisp_Object obj
, frames
;
1715 Lisp_Object window
, windows
, best_window
, frame_arg
;
1717 struct gcpro gcpro1
;
1719 /* If we're only looping through windows on a particular frame,
1720 frame points to that frame. If we're looping through windows
1721 on all frames, frame is 0. */
1722 if (FRAMEP (frames
))
1723 f
= XFRAME (frames
);
1724 else if (NILP (frames
))
1725 f
= SELECTED_FRAME ();
1730 frame_arg
= Qlambda
;
1731 else if (XFASTINT (frames
) == 0)
1733 else if (EQ (frames
, Qvisible
))
1738 /* frame_arg is Qlambda to stick to one frame,
1739 Qvisible to consider all visible frames,
1742 /* Pick a window to start with. */
1746 window
= FRAME_SELECTED_WINDOW (f
);
1748 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1750 /* Figure out the last window we're going to mess with. Since
1751 Fnext_window, given the same options, is guaranteed to go in a
1752 ring, we can just use Fprevious_window to find the last one.
1754 We can't just wait until we hit the first window again, because
1755 it might be deleted. */
1757 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1761 for (; CONSP (windows
); windows
= CDR (windows
))
1765 window
= XCAR (windows
);
1766 w
= XWINDOW (window
);
1768 /* Note that we do not pay attention here to whether the frame
1769 is visible, since Fwindow_list skips non-visible frames if
1770 that is desired, under the control of frame_arg. */
1771 if (!MINI_WINDOW_P (w
)
1772 /* For UNSHOW_BUFFER, we must always consider all windows. */
1773 || type
== UNSHOW_BUFFER
1774 || (mini
&& minibuf_level
> 0))
1777 case GET_BUFFER_WINDOW
:
1778 if (EQ (w
->buffer
, obj
)
1779 /* Don't find any minibuffer window
1780 except the one that is currently in use. */
1781 && (MINI_WINDOW_P (w
)
1782 ? EQ (window
, minibuf_window
)
1790 case GET_LRU_WINDOW
:
1791 /* t as arg means consider only full-width windows */
1792 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
1794 /* Ignore dedicated windows and minibuffers. */
1795 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1797 if (NILP (best_window
)
1798 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1799 > XFASTINT (w
->use_time
)))
1800 best_window
= window
;
1803 case DELETE_OTHER_WINDOWS
:
1804 if (!EQ (window
, obj
))
1805 Fdelete_window (window
);
1808 case DELETE_BUFFER_WINDOWS
:
1809 if (EQ (w
->buffer
, obj
))
1811 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
1813 /* If this window is dedicated, and in a frame of its own,
1815 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1816 && !NILP (w
->dedicated
)
1817 && other_visible_frames (f
))
1819 /* Skip the other windows on this frame.
1820 There might be one, the minibuffer! */
1821 while (CONSP (XCDR (windows
))
1822 && EQ (XWINDOW (XCAR (windows
))->frame
,
1823 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1824 windows
= XCDR (windows
);
1826 /* Now we can safely delete the frame. */
1827 Fdelete_frame (w
->frame
, Qnil
);
1829 else if (NILP (w
->parent
))
1831 /* If we're deleting the buffer displayed in the
1832 only window on the frame, find a new buffer to
1835 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1837 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1838 Fset_window_buffer (window
, buffer
);
1839 if (EQ (window
, selected_window
))
1840 Fset_buffer (w
->buffer
);
1843 Fdelete_window (window
);
1847 case GET_LARGEST_WINDOW
:
1849 /* Ignore dedicated windows and minibuffers. */
1850 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1853 if (NILP (best_window
))
1854 best_window
= window
;
1857 struct window
*b
= XWINDOW (best_window
);
1858 if (XFASTINT (w
->height
) * XFASTINT (w
->width
)
1859 > XFASTINT (b
->height
) * XFASTINT (b
->width
))
1860 best_window
= window
;
1866 if (EQ (w
->buffer
, obj
))
1869 struct frame
*f
= XFRAME (w
->frame
);
1871 /* Find another buffer to show in this window. */
1872 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1874 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1876 /* If this window is dedicated, and in a frame of its own,
1878 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1879 && !NILP (w
->dedicated
)
1880 && other_visible_frames (f
))
1882 /* Skip the other windows on this frame.
1883 There might be one, the minibuffer! */
1884 while (CONSP (XCDR (windows
))
1885 && EQ (XWINDOW (XCAR (windows
))->frame
,
1886 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1887 windows
= XCDR (windows
);
1889 /* Now we can safely delete the frame. */
1890 Fdelete_frame (w
->frame
, Qnil
);
1894 /* Otherwise show a different buffer in the window. */
1895 w
->dedicated
= Qnil
;
1896 Fset_window_buffer (window
, buffer
);
1897 if (EQ (window
, selected_window
))
1898 Fset_buffer (w
->buffer
);
1903 /* Check for a window that has a killed buffer. */
1904 case CHECK_ALL_WINDOWS
:
1905 if (! NILP (w
->buffer
)
1906 && NILP (XBUFFER (w
->buffer
)->name
))
1910 case WINDOW_LOOP_UNUSED
:
1919 /* Used for debugging. Abort if any window has a dead buffer. */
1922 check_all_windows ()
1924 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
1927 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1928 "Return the window least recently selected or used for display.\n\
1929 If optional argument FRAME is `visible', search all visible frames.\n\
1930 If FRAME is 0, search all visible and iconified frames.\n\
1931 If FRAME is t, search all frames.\n\
1932 If FRAME is nil, search only the selected frame.\n\
1933 If FRAME is a frame, search only that frame.")
1937 register Lisp_Object w
;
1938 /* First try for a window that is full-width */
1939 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1940 if (!NILP (w
) && !EQ (w
, selected_window
))
1942 /* If none of them, try the rest */
1943 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1946 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1947 "Return the largest window in area.\n\
1948 If optional argument FRAME is `visible', search all visible frames.\n\
1949 If FRAME is 0, search all visible and iconified frames.\n\
1950 If FRAME is t, search all frames.\n\
1951 If FRAME is nil, search only the selected frame.\n\
1952 If FRAME is a frame, search only that frame.")
1956 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1960 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1961 "Return a window currently displaying BUFFER, or nil if none.\n\
1962 If optional argument FRAME is `visible', search all visible frames.\n\
1963 If optional argument FRAME is 0, search all visible and iconified frames.\n\
1964 If FRAME is t, search all frames.\n\
1965 If FRAME is nil, search only the selected frame.\n\
1966 If FRAME is a frame, search only that frame.")
1968 Lisp_Object buffer
, frame
;
1970 buffer
= Fget_buffer (buffer
);
1971 if (BUFFERP (buffer
))
1972 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1977 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1979 "Make WINDOW (or the selected window) fill its frame.\n\
1980 Only the frame WINDOW is on is affected.\n\
1981 This function tries to reduce display jumps\n\
1982 by keeping the text previously visible in WINDOW\n\
1983 in the same place on the frame. Doing this depends on\n\
1984 the value of (window-start WINDOW), so if calling this function\n\
1985 in a program gives strange scrolling, make sure the window-start\n\
1986 value is reasonable when this function is called.")
1995 window
= selected_window
;
1997 CHECK_LIVE_WINDOW (window
, 0);
1999 w
= XWINDOW (window
);
2001 startpos
= marker_position (w
->start
);
2002 top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2004 if (MINI_WINDOW_P (w
) && top
> 0)
2005 error ("Can't expand minibuffer to full frame");
2007 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2009 /* Try to minimize scrolling, by setting the window start to the point
2010 will cause the text at the old window start to be at the same place
2011 on the frame. But don't try to do this if the window start is
2012 outside the visible portion (as might happen when the display is
2013 not current, due to typeahead). */
2014 if (startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2015 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2017 struct position pos
;
2018 struct buffer
*obuf
= current_buffer
;
2020 Fset_buffer (w
->buffer
);
2021 /* This computation used to temporarily move point, but that can
2022 have unwanted side effects due to text properties. */
2023 pos
= *vmotion (startpos
, -top
, w
);
2025 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2026 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2027 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2029 /* We need to do this, so that the window-scroll-functions
2031 w
->optional_new_start
= Qt
;
2033 set_buffer_internal (obuf
);
2039 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2040 1, 2, "bDelete windows on (buffer): ",
2041 "Delete all windows showing BUFFER.\n\
2042 Optional second argument FRAME controls which frames are affected.\n\
2043 If optional argument FRAME is `visible', search all visible frames.\n\
2044 If FRAME is 0, search all visible and iconified frames.\n\
2045 If FRAME is nil, search all frames.\n\
2046 If FRAME is t, search only the selected frame.\n\
2047 If FRAME is a frame, search only that frame.")
2049 Lisp_Object buffer
, frame
;
2051 /* FRAME uses t and nil to mean the opposite of what window_loop
2055 else if (EQ (frame
, Qt
))
2060 buffer
= Fget_buffer (buffer
);
2061 CHECK_BUFFER (buffer
, 0);
2062 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2068 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2069 Sreplace_buffer_in_windows
,
2070 1, 1, "bReplace buffer in windows: ",
2071 "Replace BUFFER with some other buffer in all windows showing it.")
2077 buffer
= Fget_buffer (buffer
);
2078 CHECK_BUFFER (buffer
, 0);
2079 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2084 /* Replace BUFFER with some other buffer in all windows
2085 of all frames, even those on other keyboards. */
2088 replace_buffer_in_all_windows (buffer
)
2092 Lisp_Object tail
, frame
;
2094 /* A single call to window_loop won't do the job
2095 because it only considers frames on the current keyboard.
2096 So loop manually over frames, and handle each one. */
2097 FOR_EACH_FRAME (tail
, frame
)
2098 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2100 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2104 /* Set the height of WINDOW and all its inferiors. */
2106 /* The smallest acceptable dimensions for a window. Anything smaller
2107 might crash Emacs. */
2109 #define MIN_SAFE_WINDOW_WIDTH (2)
2110 #define MIN_SAFE_WINDOW_HEIGHT (2)
2112 /* Make sure that window_min_height and window_min_width are
2113 not too small; if they are, set them to safe minima. */
2116 check_min_window_sizes ()
2118 /* Smaller values might permit a crash. */
2119 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2120 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2121 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2122 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2125 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2126 minimum allowable size. */
2129 check_frame_size (frame
, rows
, cols
)
2133 /* For height, we have to see:
2134 whether the frame has a minibuffer,
2135 whether it wants a mode line, and
2136 whether it has a menu bar. */
2138 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
2139 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
2140 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
2142 if (FRAME_TOP_MARGIN (frame
) > 0)
2143 min_height
+= FRAME_TOP_MARGIN (frame
);
2145 if (*rows
< min_height
)
2147 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2148 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2152 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2153 check if W's width can be changed, otherwise check W's height.
2154 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2155 siblings, too. If none of the siblings is resizable, WINDOW isn't
2159 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2161 int width_p
, check_siblings_p
;
2166 if (!NILP (w
->hchild
))
2168 c
= XWINDOW (w
->hchild
);
2172 /* A horiz. combination is fixed-width if all of if its
2174 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2175 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2176 fixed_p
= c
== NULL
;
2180 /* A horiz. combination is fixed-height if one of if its
2182 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2183 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2184 fixed_p
= c
!= NULL
;
2187 else if (!NILP (w
->vchild
))
2189 c
= XWINDOW (w
->vchild
);
2193 /* A vert. combination is fixed-width if one of if its
2195 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2196 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2197 fixed_p
= c
!= NULL
;
2201 /* A vert. combination is fixed-height if all of if its
2203 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2204 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2205 fixed_p
= c
== NULL
;
2208 else if (BUFFERP (w
->buffer
))
2210 if (w
->height_fixed_p
&& !width_p
)
2214 struct buffer
*old
= current_buffer
;
2217 current_buffer
= XBUFFER (w
->buffer
);
2218 val
= find_symbol_value (Qwindow_size_fixed
);
2219 current_buffer
= old
;
2222 if (!EQ (val
, Qunbound
))
2224 fixed_p
= !NILP (val
);
2227 && ((EQ (val
, Qheight
) && width_p
)
2228 || (EQ (val
, Qwidth
) && !width_p
)))
2233 /* Can't tell if this one is resizable without looking at
2234 siblings. If all siblings are fixed-size this one is too. */
2235 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2239 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2240 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2244 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2245 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2259 /* Return the minimum size of window W, not taking fixed-width windows
2260 into account. WIDTH_P non-zero means return the minimum width,
2261 otherwise return the minimum height. If W is a combination window,
2262 compute the minimum size from the minimum sizes of W's children. */
2265 window_min_size_1 (w
, width_p
)
2272 if (!NILP (w
->hchild
))
2274 c
= XWINDOW (w
->hchild
);
2279 /* The min width of a horizontal combination is
2280 the sum of the min widths of its children. */
2283 size
+= window_min_size_1 (c
, width_p
);
2284 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2289 /* The min height a horizontal combination equals
2290 the maximum of all min height of its children. */
2293 int min_size
= window_min_size_1 (c
, width_p
);
2294 size
= max (min_size
, size
);
2295 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2299 else if (!NILP (w
->vchild
))
2301 c
= XWINDOW (w
->vchild
);
2306 /* The min width of a vertical combination is
2307 the maximum of the min widths of its children. */
2310 int min_size
= window_min_size_1 (c
, width_p
);
2311 size
= max (min_size
, size
);
2312 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2317 /* The min height of a vertical combination equals
2318 the sum of the min height of its children. */
2321 size
+= window_min_size_1 (c
, width_p
);
2322 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2329 size
= window_min_width
;
2332 if (MINI_WINDOW_P (w
)
2333 || (!WINDOW_WANTS_MODELINE_P (w
)
2334 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2337 size
= window_min_height
;
2345 /* Return the minimum size of window W, taking fixed-size windows into
2346 account. WIDTH_P non-zero means return the minimum width,
2347 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2348 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2349 unless FIXED is null. */
2352 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2354 int width_p
, ignore_fixed_p
, *fixed
;
2361 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2367 size
= width_p
? XFASTINT (w
->width
) : XFASTINT (w
->height
);
2369 size
= window_min_size_1 (w
, width_p
);
2375 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2376 WINDOW's width. Resize WINDOW's children, if any, so that they
2377 keep their proportionate size relative to WINDOW. Propagate
2378 WINDOW's top or left edge position to children. Delete windows
2379 that become too small unless NODELETE_P is non-zero. */
2382 size_window (window
, size
, width_p
, nodelete_p
)
2384 int size
, width_p
, nodelete_p
;
2386 struct window
*w
= XWINDOW (window
);
2388 Lisp_Object child
, *forward
, *sideward
;
2389 int old_size
, min_size
;
2391 check_min_window_sizes ();
2392 size
= max (0, size
);
2394 /* If the window has been "too small" at one point,
2395 don't delete it for being "too small" in the future.
2396 Preserve it as long as that is at all possible. */
2399 old_size
= XINT (w
->width
);
2400 min_size
= window_min_width
;
2404 old_size
= XINT (w
->height
);
2405 min_size
= window_min_height
;
2408 if (old_size
< window_min_width
)
2409 w
->too_small_ok
= Qt
;
2411 /* Maybe delete WINDOW if it's too small. */
2412 if (!nodelete_p
&& !NILP (w
->parent
))
2416 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2417 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2419 min_size
= width_p
? window_min_width
: window_min_height
;
2421 if (size
< min_size
)
2423 delete_window (window
);
2428 /* Set redisplay hints. */
2429 w
->last_modified
= make_number (0);
2430 w
->last_overlay_modified
= make_number (0);
2431 windows_or_buffers_changed
++;
2432 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2436 sideward
= &w
->vchild
;
2437 forward
= &w
->hchild
;
2438 w
->width
= make_number (size
);
2442 sideward
= &w
->hchild
;
2443 forward
= &w
->vchild
;
2444 w
->height
= make_number (size
);
2447 if (!NILP (*sideward
))
2449 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2451 c
= XWINDOW (child
);
2456 size_window (child
, size
, width_p
, nodelete_p
);
2459 else if (!NILP (*forward
))
2461 int fixed_size
, each
, extra
, n
;
2462 int resize_fixed_p
, nfixed
;
2463 int last_pos
, first_pos
, nchildren
, total
;
2465 /* Determine the fixed-size portion of the this window, and the
2466 number of child windows. */
2467 fixed_size
= nchildren
= nfixed
= total
= 0;
2468 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2472 c
= XWINDOW (child
);
2473 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2474 total
+= child_size
;
2476 if (window_fixed_size_p (c
, width_p
, 0))
2478 fixed_size
+= child_size
;
2483 /* If the new size is smaller than fixed_size, or if there
2484 aren't any resizable windows, allow resizing fixed-size
2486 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2488 /* Compute how many lines/columns to add to each child. The
2489 value of extra takes care of rounding errors. */
2490 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2491 each
= (size
- total
) / n
;
2492 extra
= (size
- total
) - n
* each
;
2494 /* Compute new children heights and edge positions. */
2495 first_pos
= width_p
? XINT (w
->left
) : XINT (w
->top
);
2496 last_pos
= first_pos
;
2497 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2499 int new_size
, old_size
;
2501 c
= XWINDOW (child
);
2502 old_size
= width_p
? XFASTINT (c
->width
) : XFASTINT (c
->height
);
2503 new_size
= old_size
;
2505 /* The top or left edge position of this child equals the
2506 bottom or right edge of its predecessor. */
2508 c
->left
= make_number (last_pos
);
2510 c
->top
= make_number (last_pos
);
2512 /* If this child can be resized, do it. */
2513 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2515 new_size
= old_size
+ each
+ extra
;
2519 /* Set new height. Note that size_window also propagates
2520 edge positions to children, so it's not a no-op if we
2521 didn't change the child's size. */
2522 size_window (child
, new_size
, width_p
, 1);
2524 /* Remember the bottom/right edge position of this child; it
2525 will be used to set the top/left edge of the next child. */
2526 last_pos
+= new_size
;
2529 /* We should have covered the parent exactly with child windows. */
2530 xassert (size
== last_pos
- first_pos
);
2532 /* Now delete any children that became too small. */
2534 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2537 c
= XWINDOW (child
);
2538 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2539 size_window (child
, child_size
, width_p
, 0);
2544 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2545 WINDOW's children. NODELETE non-zero means don't delete windows
2546 that become too small in the process. (The caller should check
2547 later and do so if appropriate.) */
2550 set_window_height (window
, height
, nodelete
)
2555 size_window (window
, height
, 0, nodelete
);
2559 /* Set WINDOW's width to WIDTH, and recursively change the width of
2560 WINDOW's children. NODELETE non-zero means don't delete windows
2561 that become too small in the process. (The caller should check
2562 later and do so if appropriate.) */
2565 set_window_width (window
, width
, nodelete
)
2570 size_window (window
, width
, 1, nodelete
);
2574 int window_select_count
;
2577 Fset_window_buffer_unwind (obuf
)
2585 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
2586 means it's allowed to run hooks. See make_frame for a case where
2587 it's not allowed. */
2590 set_window_buffer (window
, buffer
, run_hooks_p
)
2591 Lisp_Object window
, buffer
;
2594 struct window
*w
= XWINDOW (window
);
2595 struct buffer
*b
= XBUFFER (buffer
);
2596 int count
= specpdl_ptr
- specpdl
;
2600 if (EQ (window
, selected_window
))
2601 b
->last_selected_window
= window
;
2603 /* Update time stamps of buffer display. */
2604 if (INTEGERP (b
->display_count
))
2605 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
2606 b
->display_time
= Fcurrent_time ();
2608 XSETFASTINT (w
->window_end_pos
, 0);
2609 XSETFASTINT (w
->window_end_vpos
, 0);
2610 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
2611 w
->window_end_valid
= Qnil
;
2612 XSETFASTINT (w
->hscroll
, 0);
2613 XSETFASTINT (w
->min_hscroll
, 0);
2614 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
2615 set_marker_restricted (w
->start
,
2616 make_number (b
->last_window_start
),
2618 w
->start_at_line_beg
= Qnil
;
2619 w
->force_start
= Qnil
;
2620 XSETFASTINT (w
->last_modified
, 0);
2621 XSETFASTINT (w
->last_overlay_modified
, 0);
2622 windows_or_buffers_changed
++;
2624 /* We must select BUFFER for running the window-scroll-functions.
2625 If WINDOW is selected, switch permanently.
2626 Otherwise, switch but go back to the ambient buffer afterward. */
2627 if (EQ (window
, selected_window
))
2628 Fset_buffer (buffer
);
2629 /* We can't check ! NILP (Vwindow_scroll_functions) here
2630 because that might itself be a local variable. */
2631 else if (window_initialized
)
2633 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
2634 Fset_buffer (buffer
);
2637 /* Set left and right marginal area width from buffer. */
2638 Fset_window_margins (window
, b
->left_margin_width
, b
->right_margin_width
);
2642 if (! NILP (Vwindow_scroll_functions
))
2643 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2644 Fmarker_position (w
->start
));
2646 if (! NILP (Vwindow_configuration_change_hook
)
2647 && ! NILP (Vrun_hooks
))
2648 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2651 unbind_to (count
, Qnil
);
2655 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
2656 "Make WINDOW display BUFFER as its contents.\n\
2657 BUFFER can be a buffer or buffer name.")
2659 register Lisp_Object window
, buffer
;
2661 register Lisp_Object tem
;
2662 register struct window
*w
= decode_window (window
);
2664 XSETWINDOW (window
, w
);
2665 buffer
= Fget_buffer (buffer
);
2666 CHECK_BUFFER (buffer
, 1);
2668 if (NILP (XBUFFER (buffer
)->name
))
2669 error ("Attempt to display deleted buffer");
2673 error ("Window is deleted");
2674 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
2675 is first being set up. */
2677 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
2678 error ("Window is dedicated to `%s'",
2679 XSTRING (XBUFFER (tem
)->name
)->data
);
2684 set_window_buffer (window
, buffer
, 1);
2688 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
2689 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
2690 If WINDOW is not already selected, also make WINDOW's buffer current.\n\
2691 Note that the main editor command loop\n\
2692 selects the buffer of the selected window before each command.")
2694 register Lisp_Object window
;
2696 return select_window_1 (window
, 1);
2699 /* Note that selected_window can be nil
2700 when this is called from Fset_window_configuration. */
2703 select_window_1 (window
, recordflag
)
2704 register Lisp_Object window
;
2707 register struct window
*w
;
2708 register struct window
*ow
;
2711 CHECK_LIVE_WINDOW (window
, 0);
2713 w
= XWINDOW (window
);
2715 if (NILP (w
->buffer
))
2716 error ("Trying to select deleted window or non-leaf window");
2718 XSETFASTINT (w
->use_time
, ++window_select_count
);
2719 if (EQ (window
, selected_window
))
2722 if (!NILP (selected_window
))
2724 ow
= XWINDOW (selected_window
);
2725 if (! NILP (ow
->buffer
))
2726 set_marker_both (ow
->pointm
, ow
->buffer
,
2727 BUF_PT (XBUFFER (ow
->buffer
)),
2728 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
2731 selected_window
= window
;
2732 sf
= SELECTED_FRAME ();
2733 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
2735 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
2736 /* Use this rather than Fhandle_switch_frame
2737 so that FRAME_FOCUS_FRAME is moved appropriately as we
2738 move around in the state where a minibuffer in a separate
2740 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
2743 sf
->selected_window
= window
;
2746 record_buffer (w
->buffer
);
2747 Fset_buffer (w
->buffer
);
2749 XBUFFER (w
->buffer
)->last_selected_window
= window
;
2751 /* Go to the point recorded in the window.
2752 This is important when the buffer is in more
2753 than one window. It also matters when
2754 redisplay_window has altered point after scrolling,
2755 because it makes the change only in the window. */
2757 register int new_point
= marker_position (w
->pointm
);
2758 if (new_point
< BEGV
)
2760 else if (new_point
> ZV
)
2766 windows_or_buffers_changed
++;
2770 /* Deiconify the frame containing the window WINDOW,
2771 unless it is the selected frame;
2774 The reason for the exception for the selected frame
2775 is that it seems better not to change the selected frames visibility
2776 merely because of displaying a different buffer in it.
2777 The deiconification is useful when a buffer gets shown in
2778 another frame that you were not using lately. */
2781 display_buffer_1 (window
)
2784 Lisp_Object frame
= XWINDOW (window
)->frame
;
2785 FRAME_PTR f
= XFRAME (frame
);
2787 FRAME_SAMPLE_VISIBILITY (f
);
2789 if (!EQ (frame
, selected_frame
))
2791 if (FRAME_ICONIFIED_P (f
))
2792 Fmake_frame_visible (frame
);
2793 else if (FRAME_VISIBLE_P (f
))
2794 Fraise_frame (frame
);
2800 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2801 "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\
2802 The value is actually t if the frame should be called with default frame\n\
2803 parameters, and a list of frame parameters if they were specified.\n\
2804 See `special-display-buffer-names', and `special-display-regexps'.")
2806 Lisp_Object buffer_name
;
2810 CHECK_STRING (buffer_name
, 1);
2812 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2816 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2820 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2822 Lisp_Object car
= XCAR (tem
);
2824 && fast_string_match (car
, buffer_name
) >= 0)
2826 else if (CONSP (car
)
2827 && STRINGP (XCAR (car
))
2828 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2834 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2835 "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\
2836 See `same-window-buffer-names' and `same-window-regexps'.")
2838 Lisp_Object buffer_name
;
2842 CHECK_STRING (buffer_name
, 1);
2844 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2848 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2852 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2854 Lisp_Object car
= XCAR (tem
);
2856 && fast_string_match (car
, buffer_name
) >= 0)
2858 else if (CONSP (car
)
2859 && STRINGP (XCAR (car
))
2860 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2866 /* Use B so the default is (other-buffer). */
2867 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
2868 "BDisplay buffer: \nP",
2869 "Make BUFFER appear in some window but don't select it.\n\
2870 BUFFER can be a buffer or a buffer name.\n\
2871 If BUFFER is shown already in some window, just use that one,\n\
2872 unless the window is the selected window and the optional second\n\
2873 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
2874 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
2875 Returns the window displaying BUFFER.\n\
2876 If `display-reuse-frames' is non-nil, and another frame is currently\n\
2877 displaying BUFFER, then simply raise that frame.\n\
2879 The variables `special-display-buffer-names', `special-display-regexps',\n\
2880 `same-window-buffer-names', and `same-window-regexps' customize how certain\n\
2881 buffer names are handled.\n\
2883 If optional argument FRAME is `visible', search all visible frames.\n\
2884 If FRAME is 0, search all visible and iconified frames.\n\
2885 If FRAME is t, search all frames.\n\
2886 If FRAME is a frame, search only that frame.\n\
2887 If FRAME is nil, search only the selected frame\n\
2888 (actually the last nonminibuffer frame),\n\
2889 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,\n\
2890 which means search visible and iconified frames.\n\
2892 If `even-window-heights' is non-nil, window heights will be evened out\n\
2893 if displaying the buffer causes two vertically adjacent windows to be\n\
2895 (buffer
, not_this_window
, frame
)
2896 register Lisp_Object buffer
, not_this_window
, frame
;
2898 register Lisp_Object window
, tem
, swp
;
2902 buffer
= Fget_buffer (buffer
);
2903 CHECK_BUFFER (buffer
, 0);
2905 if (!NILP (Vdisplay_buffer_function
))
2906 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2908 if (NILP (not_this_window
)
2909 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2910 return display_buffer_1 (selected_window
);
2912 /* See if the user has specified this buffer should appear
2913 in the selected window. */
2914 if (NILP (not_this_window
))
2916 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
2917 if (!NILP (swp
) && !no_switch_window (selected_window
))
2919 Fswitch_to_buffer (buffer
, Qnil
);
2920 return display_buffer_1 (selected_window
);
2924 /* If the user wants pop-up-frames or display-reuse-frames, then
2925 look for a window showing BUFFER on any visible or iconified frame.
2926 Otherwise search only the current frame. */
2929 else if (pop_up_frames
2930 || display_buffer_reuse_frames
2931 || last_nonminibuf_frame
== 0)
2932 XSETFASTINT (tem
, 0);
2934 XSETFRAME (tem
, last_nonminibuf_frame
);
2936 window
= Fget_buffer_window (buffer
, tem
);
2938 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2939 return display_buffer_1 (window
);
2941 /* Certain buffer names get special handling. */
2942 if (!NILP (Vspecial_display_function
) && NILP (swp
))
2944 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2946 return call1 (Vspecial_display_function
, buffer
);
2948 return call2 (Vspecial_display_function
, buffer
, tem
);
2951 /* If there are no frames open that have more than a minibuffer,
2952 we need to create a new frame. */
2953 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2955 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2956 Fset_window_buffer (window
, buffer
);
2957 return display_buffer_1 (window
);
2960 f
= SELECTED_FRAME ();
2962 || FRAME_MINIBUF_ONLY_P (f
)
2963 /* If the current frame is a special display frame,
2964 don't try to reuse its windows. */
2965 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
2970 if (FRAME_MINIBUF_ONLY_P (f
))
2971 XSETFRAME (frames
, last_nonminibuf_frame
);
2972 /* Don't try to create a window if would get an error */
2973 if (split_height_threshold
< window_min_height
<< 1)
2974 split_height_threshold
= window_min_height
<< 1;
2976 /* Note that both Fget_largest_window and Fget_lru_window
2977 ignore minibuffers and dedicated windows.
2978 This means they can return nil. */
2980 /* If the frame we would try to split cannot be split,
2981 try other frames. */
2982 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
2984 /* Try visible frames first. */
2985 window
= Fget_largest_window (Qvisible
);
2986 /* If that didn't work, try iconified frames. */
2988 window
= Fget_largest_window (make_number (0));
2990 window
= Fget_largest_window (Qt
);
2993 window
= Fget_largest_window (frames
);
2995 /* If we got a tall enough full-width window that can be split,
2998 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2999 && window_height (window
) >= split_height_threshold
3000 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
3001 window
= Fsplit_window (window
, Qnil
, Qnil
);
3004 Lisp_Object upper
, lower
, other
;
3006 window
= Fget_lru_window (frames
);
3007 /* If the LRU window is selected, and big enough,
3008 and can be split, split it. */
3010 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3011 && (EQ (window
, selected_window
)
3012 || EQ (XWINDOW (window
)->parent
, Qnil
))
3013 && window_height (window
) >= window_min_height
<< 1)
3014 window
= Fsplit_window (window
, Qnil
, Qnil
);
3015 /* If Fget_lru_window returned nil, try other approaches. */
3017 /* Try visible frames first. */
3019 window
= Fget_buffer_window (buffer
, Qvisible
);
3021 window
= Fget_largest_window (Qvisible
);
3022 /* If that didn't work, try iconified frames. */
3024 window
= Fget_buffer_window (buffer
, make_number (0));
3026 window
= Fget_largest_window (make_number (0));
3027 /* Try invisible frames. */
3029 window
= Fget_buffer_window (buffer
, Qt
);
3031 window
= Fget_largest_window (Qt
);
3032 /* As a last resort, make a new frame. */
3034 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3035 /* If window appears above or below another,
3036 even out their heights. */
3037 other
= upper
= lower
= Qnil
;
3038 if (!NILP (XWINDOW (window
)->prev
))
3039 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3040 if (!NILP (XWINDOW (window
)->next
))
3041 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3043 && !NILP (Veven_window_heights
)
3044 /* Check that OTHER and WINDOW are vertically arrayed. */
3045 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
3046 && (XFASTINT (XWINDOW (other
)->height
)
3047 > XFASTINT (XWINDOW (window
)->height
)))
3049 int total
= (XFASTINT (XWINDOW (other
)->height
)
3050 + XFASTINT (XWINDOW (window
)->height
));
3051 enlarge_window (upper
,
3052 total
/ 2 - XFASTINT (XWINDOW (upper
)->height
),
3058 window
= Fget_lru_window (Qnil
);
3060 Fset_window_buffer (window
, buffer
);
3061 return display_buffer_1 (window
);
3065 temp_output_buffer_show (buf
)
3066 register Lisp_Object buf
;
3068 register struct buffer
*old
= current_buffer
;
3069 register Lisp_Object window
;
3070 register struct window
*w
;
3072 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3075 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3079 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3080 set_buffer_internal (old
);
3082 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3083 call1 (Vtemp_buffer_show_function
, buf
);
3086 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3088 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3089 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3090 Vminibuf_scroll_window
= window
;
3091 w
= XWINDOW (window
);
3092 XSETFASTINT (w
->hscroll
, 0);
3093 XSETFASTINT (w
->min_hscroll
, 0);
3094 set_marker_restricted_both (w
->start
, buf
, 1, 1);
3095 set_marker_restricted_both (w
->pointm
, buf
, 1, 1);
3097 /* Run temp-buffer-show-hook, with the chosen window selected
3098 and it sbuffer current. */
3099 if (!NILP (Vrun_hooks
))
3102 tem
= Fboundp (Qtemp_buffer_show_hook
);
3105 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
3108 int count
= specpdl_ptr
- specpdl
;
3109 Lisp_Object prev_window
;
3110 prev_window
= selected_window
;
3112 /* Select the window that was chosen, for running the hook. */
3113 record_unwind_protect (Fselect_window
, prev_window
);
3114 select_window_1 (window
, 0);
3115 Fset_buffer (w
->buffer
);
3116 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3117 select_window_1 (prev_window
, 0);
3118 unbind_to (count
, Qnil
);
3126 make_dummy_parent (window
)
3130 register struct window
*o
, *p
;
3131 register struct Lisp_Vector
*vec
;
3134 o
= XWINDOW (window
);
3135 vec
= allocate_vectorlike ((EMACS_INT
)VECSIZE (struct window
));
3136 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3137 vec
->contents
[i
] = ((struct Lisp_Vector
*)o
)->contents
[i
];
3138 vec
->size
= VECSIZE (struct window
);
3139 p
= (struct window
*)vec
;
3140 XSETWINDOW (new, p
);
3142 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
3144 /* Put new into window structure in place of window */
3145 replace_window (window
, new);
3158 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3159 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
3160 WINDOW defaults to selected one and SIZE to half its size.\n\
3161 If optional third arg HORFLAG is non-nil, split side by side\n\
3162 and put SIZE columns in the first of the pair. In that case,\n\
3163 SIZE includes that window's scroll bar, or the divider column to its right.")
3164 (window
, size
, horflag
)
3165 Lisp_Object window
, size
, horflag
;
3167 register Lisp_Object
new;
3168 register struct window
*o
, *p
;
3170 register int size_int
;
3173 window
= selected_window
;
3175 CHECK_LIVE_WINDOW (window
, 0);
3177 o
= XWINDOW (window
);
3178 fo
= XFRAME (WINDOW_FRAME (o
));
3182 if (!NILP (horflag
))
3183 /* Calculate the size of the left-hand window, by dividing
3184 the usable space in columns by two.
3185 We round up, since the left-hand window may include
3186 a dividing line, while the right-hand may not. */
3187 size_int
= (XFASTINT (o
->width
) + 1) >> 1;
3189 size_int
= XFASTINT (o
->height
) >> 1;
3193 CHECK_NUMBER (size
, 1);
3194 size_int
= XINT (size
);
3197 if (MINI_WINDOW_P (o
))
3198 error ("Attempt to split minibuffer window");
3199 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3200 error ("Attempt to split fixed-size window");
3202 check_min_window_sizes ();
3206 if (size_int
< window_min_height
)
3207 error ("Window height %d too small (after splitting)", size_int
);
3208 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
3209 error ("Window height %d too small (after splitting)",
3210 XFASTINT (o
->height
) - size_int
);
3211 if (NILP (o
->parent
)
3212 || NILP (XWINDOW (o
->parent
)->vchild
))
3214 make_dummy_parent (window
);
3216 XWINDOW (new)->vchild
= window
;
3221 if (size_int
< window_min_width
)
3222 error ("Window width %d too small (after splitting)", size_int
);
3224 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
3225 error ("Window width %d too small (after splitting)",
3226 XFASTINT (o
->width
) - size_int
);
3227 if (NILP (o
->parent
)
3228 || NILP (XWINDOW (o
->parent
)->hchild
))
3230 make_dummy_parent (window
);
3232 XWINDOW (new)->hchild
= window
;
3236 /* Now we know that window's parent is a vertical combination
3237 if we are dividing vertically, or a horizontal combination
3238 if we are making side-by-side windows */
3240 windows_or_buffers_changed
++;
3241 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3242 new = make_window ();
3245 p
->frame
= o
->frame
;
3247 if (!NILP (p
->next
))
3248 XWINDOW (p
->next
)->prev
= new;
3251 p
->parent
= o
->parent
;
3253 p
->window_end_valid
= Qnil
;
3254 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3256 /* Apportion the available frame space among the two new windows */
3258 if (!NILP (horflag
))
3260 p
->height
= o
->height
;
3262 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
3263 XSETFASTINT (o
->width
, size_int
);
3264 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
3269 p
->width
= o
->width
;
3270 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
3271 XSETFASTINT (o
->height
, size_int
);
3272 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
3275 /* Adjust glyph matrices. */
3277 Fset_window_buffer (new, o
->buffer
);
3281 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
3282 "Make current window ARG lines bigger.\n\
3283 From program, optional second arg non-nil means grow sideways ARG columns.")
3285 register Lisp_Object arg
, side
;
3287 CHECK_NUMBER (arg
, 0);
3288 enlarge_window (selected_window
, XINT (arg
), !NILP (side
));
3290 if (! NILP (Vwindow_configuration_change_hook
))
3291 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3296 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
3297 "Make current window ARG lines smaller.\n\
3298 From program, optional second arg non-nil means shrink sideways arg columns.")
3300 register Lisp_Object arg
, side
;
3302 CHECK_NUMBER (arg
, 0);
3303 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
3305 if (! NILP (Vwindow_configuration_change_hook
))
3306 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3312 window_height (window
)
3315 register struct window
*p
= XWINDOW (window
);
3316 return XFASTINT (p
->height
);
3320 window_width (window
)
3323 register struct window
*p
= XWINDOW (window
);
3324 return XFASTINT (p
->width
);
3329 *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top))
3331 #define CURSIZE(w) \
3332 *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height))
3335 /* Enlarge selected_window by DELTA. WIDTHFLAG non-zero means
3336 increase its width. Siblings of the selected window are resized to
3337 fullfil the size request. If they become too small in the process,
3338 they will be deleted. */
3341 enlarge_window (window
, delta
, widthflag
)
3343 int delta
, widthflag
;
3345 Lisp_Object parent
, next
, prev
;
3349 int (*sizefun
) P_ ((Lisp_Object
))
3350 = widthflag
? window_width
: window_height
;
3351 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3352 = (widthflag
? set_window_width
: set_window_height
);
3354 /* Check values of window_min_width and window_min_height for
3356 check_min_window_sizes ();
3358 /* Give up if this window cannot be resized. */
3359 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3360 error ("Window is not resizable");
3362 /* Find the parent of the selected window. */
3365 p
= XWINDOW (window
);
3371 error ("No other window to side of this one");
3376 ? !NILP (XWINDOW (parent
)->hchild
)
3377 : !NILP (XWINDOW (parent
)->vchild
))
3383 sizep
= &CURSIZE (window
);
3386 register int maxdelta
;
3388 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
3389 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
3390 - window_min_size (XWINDOW (p
->next
),
3392 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
3393 - window_min_size (XWINDOW (p
->prev
),
3395 /* This is a frame with only one window, a minibuffer-only
3396 or a minibufferless frame. */
3399 if (delta
> maxdelta
)
3400 /* This case traps trying to make the minibuffer
3401 the full frame, or make the only window aside from the
3402 minibuffer the full frame. */
3406 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
3408 delete_window (window
);
3415 /* Find the total we can get from other siblings. */
3417 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
3418 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
3420 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
3421 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
3424 /* If we can get it all from them, do so. */
3425 if (delta
<= maximum
)
3427 Lisp_Object first_unaffected
;
3428 Lisp_Object first_affected
;
3433 first_affected
= window
;
3434 /* Look at one sibling at a time,
3435 moving away from this window in both directions alternately,
3436 and take as much as we can get without deleting that sibling. */
3437 while (delta
!= 0 && (!NILP (next
) || !NILP (prev
)))
3441 int this_one
= ((*sizefun
) (next
)
3442 - window_min_size (XWINDOW (next
),
3443 widthflag
, 0, &fixed_p
));
3446 if (this_one
> delta
)
3449 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
3450 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3455 next
= XWINDOW (next
)->next
;
3463 int this_one
= ((*sizefun
) (prev
)
3464 - window_min_size (XWINDOW (prev
),
3465 widthflag
, 0, &fixed_p
));
3468 if (this_one
> delta
)
3471 first_affected
= prev
;
3473 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
3474 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3479 prev
= XWINDOW (prev
)->prev
;
3483 xassert (delta
== 0);
3485 /* Now recalculate the edge positions of all the windows affected,
3486 based on the new sizes. */
3487 first_unaffected
= next
;
3488 prev
= first_affected
;
3489 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
3490 prev
= next
, next
= XWINDOW (next
)->next
)
3492 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
3493 /* This does not change size of NEXT,
3494 but it propagates the new top edge to its children */
3495 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
3500 register int delta1
;
3501 register int opht
= (*sizefun
) (parent
);
3503 /* If trying to grow this window to or beyond size of the parent,
3504 make delta1 so big that, on shrinking back down,
3505 all the siblings end up with less than one line and are deleted. */
3506 if (opht
<= XINT (*sizep
) + delta
)
3507 delta1
= opht
* opht
* 2;
3510 /* Otherwise, make delta1 just right so that if we add
3511 delta1 lines to this window and to the parent, and then
3512 shrink the parent back to its original size, the new
3513 proportional size of this window will increase by delta.
3515 The function size_window will compute the new height h'
3516 of the window from delta1 as:
3519 x = delta1 - delta1/n * n for the 1st resizable child
3522 where n is the number of children that can be resized.
3523 We can ignore x by choosing a delta1 that is a multiple of
3524 n. We want the height of this window to come out as
3534 The number of children n rquals the number of resizable
3535 children of this window + 1 because we know window itself
3536 is resizable (otherwise we would have signalled an error. */
3538 struct window
*w
= XWINDOW (window
);
3542 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
3543 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3545 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
3546 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3552 /* Add delta1 lines or columns to this window, and to the parent,
3553 keeping things consistent while not affecting siblings. */
3554 XSETINT (CURSIZE (parent
), opht
+ delta1
);
3555 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
3557 /* Squeeze out delta1 lines or columns from our parent,
3558 shriking this window and siblings proportionately.
3559 This brings parent back to correct size.
3560 Delta1 was calculated so this makes this window the desired size,
3561 taking it all out of the siblings. */
3562 (*setsizefun
) (parent
, opht
, 0);
3565 XSETFASTINT (p
->last_modified
, 0);
3566 XSETFASTINT (p
->last_overlay_modified
, 0);
3568 /* Adjust glyph matrices. */
3569 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
3577 /***********************************************************************
3578 Resizing Mini-Windows
3579 ***********************************************************************/
3581 static void shrink_window_lowest_first
P_ ((struct window
*, int));
3583 enum save_restore_action
3590 static int save_restore_orig_size
P_ ((struct window
*,
3591 enum save_restore_action
));
3593 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
3594 from lowest windows first. */
3597 shrink_window_lowest_first (w
, height
)
3605 xassert (!MINI_WINDOW_P (w
));
3607 /* Set redisplay hints. */
3608 XSETFASTINT (w
->last_modified
, 0);
3609 XSETFASTINT (w
->last_overlay_modified
, 0);
3610 windows_or_buffers_changed
++;
3611 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
3613 old_height
= XFASTINT (w
->height
);
3614 XSETFASTINT (w
->height
, height
);
3616 if (!NILP (w
->hchild
))
3618 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
3620 c
= XWINDOW (child
);
3622 shrink_window_lowest_first (c
, height
);
3625 else if (!NILP (w
->vchild
))
3627 Lisp_Object last_child
;
3628 int delta
= old_height
- height
;
3633 /* Find the last child. We are taking space from lowest windows
3634 first, so we iterate over children from the last child
3636 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
3639 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
3640 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
3644 c
= XWINDOW (child
);
3645 this_one
= XFASTINT (c
->height
) - MIN_SAFE_WINDOW_HEIGHT
;
3647 if (this_one
> delta
)
3650 shrink_window_lowest_first (c
, XFASTINT (c
->height
) - this_one
);
3654 /* Compute new positions. */
3655 last_top
= XINT (w
->top
);
3656 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
3658 c
= XWINDOW (child
);
3659 c
->top
= make_number (last_top
);
3660 shrink_window_lowest_first (c
, XFASTINT (c
->height
));
3661 last_top
+= XFASTINT (c
->height
);
3667 /* Save, restore, or check positions and sizes in the window tree
3668 rooted at W. ACTION says what to do.
3670 If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height
3671 members are valid for all windows in the window tree. Value is
3672 non-zero if they are valid.
3674 If ACTION is SAVE_ORIG_SIZES, save members top and height in
3675 orig_top and orig_height for all windows in the tree.
3677 If ACTION is RESTORE_ORIG_SIZES, restore top and height from
3678 values stored in orig_top and orig_height for all windows. */
3681 save_restore_orig_size (w
, action
)
3683 enum save_restore_action action
;
3689 if (!NILP (w
->hchild
))
3691 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
3694 else if (!NILP (w
->vchild
))
3696 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
3702 case CHECK_ORIG_SIZES
:
3703 if (!INTEGERP (w
->orig_top
) || !INTEGERP (w
->orig_height
))
3707 case SAVE_ORIG_SIZES
:
3708 w
->orig_top
= w
->top
;
3709 w
->orig_height
= w
->height
;
3710 XSETFASTINT (w
->last_modified
, 0);
3711 XSETFASTINT (w
->last_overlay_modified
, 0);
3714 case RESTORE_ORIG_SIZES
:
3715 xassert (INTEGERP (w
->orig_top
) && INTEGERP (w
->orig_height
));
3716 w
->top
= w
->orig_top
;
3717 w
->height
= w
->orig_height
;
3718 w
->orig_height
= w
->orig_top
= Qnil
;
3719 XSETFASTINT (w
->last_modified
, 0);
3720 XSETFASTINT (w
->last_overlay_modified
, 0);
3727 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
3734 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
3735 without deleting other windows. */
3738 grow_mini_window (w
, delta
)
3742 struct frame
*f
= XFRAME (w
->frame
);
3743 struct window
*root
;
3745 xassert (MINI_WINDOW_P (w
));
3746 xassert (delta
>= 0);
3748 /* Check values of window_min_width and window_min_height for
3750 check_min_window_sizes ();
3752 /* Compute how much we can enlarge the mini-window without deleting
3754 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3757 int min_height
= window_min_size (root
, 0, 0, 0);
3758 if (XFASTINT (root
->height
) - delta
< min_height
)
3759 delta
= XFASTINT (root
->height
) - min_height
;
3764 /* Save original window sizes and positions, if not already done. */
3765 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3766 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
3768 /* Shrink other windows. */
3769 shrink_window_lowest_first (root
, XFASTINT (root
->height
) - delta
);
3771 /* Grow the mini-window. */
3772 w
->top
= make_number (XFASTINT (root
->top
) + XFASTINT (root
->height
));
3773 w
->height
= make_number (XFASTINT (w
->height
) + delta
);
3774 XSETFASTINT (w
->last_modified
, 0);
3775 XSETFASTINT (w
->last_overlay_modified
, 0);
3782 /* Shrink mini-window W. If there is recorded info about window sizes
3783 before a call to grow_mini_window, restore recorded window sizes.
3784 Otherwise, if the mini-window is higher than 1 line, resize it to 1
3788 shrink_mini_window (w
)
3791 struct frame
*f
= XFRAME (w
->frame
);
3792 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3794 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3796 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
3798 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3799 windows_or_buffers_changed
= 1;
3801 else if (XFASTINT (w
->height
) > 1)
3804 XSETWINDOW (window
, w
);
3805 enlarge_window (window
, 1 - XFASTINT (w
->height
), 0);
3811 /* Mark window cursors off for all windows in the window tree rooted
3812 at W by setting their phys_cursor_on_p flag to zero. Called from
3813 xterm.c, e.g. when a frame is cleared and thereby all cursors on
3814 the frame are cleared. */
3817 mark_window_cursors_off (w
)
3822 if (!NILP (w
->hchild
))
3823 mark_window_cursors_off (XWINDOW (w
->hchild
));
3824 else if (!NILP (w
->vchild
))
3825 mark_window_cursors_off (XWINDOW (w
->vchild
));
3827 w
->phys_cursor_on_p
= 0;
3829 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3834 /* Return number of lines of text (not counting mode line) in W. */
3837 window_internal_height (w
)
3840 int ht
= XFASTINT (w
->height
);
3842 if (MINI_WINDOW_P (w
))
3845 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
3846 || !NILP (w
->next
) || !NILP (w
->prev
)
3847 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
3854 /* Return the number of columns in W.
3855 Don't count columns occupied by scroll bars or the vertical bar
3856 separating W from the sibling to its right. */
3859 window_internal_width (w
)
3862 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3863 int width
= XINT (w
->width
);
3865 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3866 /* Scroll bars occupy a few columns. */
3867 width
-= FRAME_SCROLL_BAR_COLS (f
);
3868 else if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
3869 /* The column of `|' characters separating side-by-side windows
3870 occupies one column only. */
3873 /* On window-systems, areas to the left and right of the window
3874 are used to display bitmaps there. */
3875 if (FRAME_WINDOW_P (f
))
3876 width
-= FRAME_FLAGS_AREA_COLS (f
);
3882 /************************************************************************
3884 ***********************************************************************/
3886 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
3887 one screen-full, which is defined as the height of the window minus
3888 next_screen_context_lines. If WHOLE is zero, scroll up N lines
3889 instead. Negative values of N mean scroll down. NOERROR non-zero
3890 means don't signal an error if we try to move over BEGV or ZV,
3894 window_scroll (window
, n
, whole
, noerror
)
3900 /* If we must, use the pixel-based version which is much slower than
3901 the line-based one but can handle varying line heights. */
3902 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
3903 window_scroll_pixel_based (window
, n
, whole
, noerror
);
3905 window_scroll_line_based (window
, n
, whole
, noerror
);
3909 /* Implementation of window_scroll that works based on pixel line
3910 heights. See the comment of window_scroll for parameter
3914 window_scroll_pixel_based (window
, n
, whole
, noerror
)
3921 struct window
*w
= XWINDOW (window
);
3922 struct text_pos start
;
3924 int this_scroll_margin
;
3926 /* True if we fiddled the window vscroll field without really scrolling. */
3929 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
3931 /* If PT is not visible in WINDOW, move back one half of
3933 tem
= Fpos_visible_in_window_p (make_number (PT
), window
, Qnil
);
3936 /* Move backward half the height of the window. Performance note:
3937 vmotion used here is about 10% faster, but would give wrong
3938 results for variable height lines. */
3939 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3940 it
.current_y
= it
.last_visible_y
;
3941 move_it_vertically (&it
, -it
.last_visible_y
/ 2);
3943 /* The function move_iterator_vertically may move over more than
3944 the specified y-distance. If it->w is small, e.g. a
3945 mini-buffer window, we may end up in front of the window's
3946 display area. This is the case when Start displaying at the
3947 start of the line containing PT in this case. */
3948 if (it
.current_y
<= 0)
3950 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3951 move_it_vertically (&it
, 0);
3955 start
= it
.current
.pos
;
3958 /* If scroll_preserve_screen_position is non-zero, we try to set
3959 point in the same window line as it is now, so get that line. */
3960 if (!NILP (Vscroll_preserve_screen_position
))
3962 start_display (&it
, w
, start
);
3963 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
3964 preserve_y
= it
.current_y
;
3969 /* Move iterator it from start the specified distance forward or
3970 backward. The result is the new window start. */
3971 start_display (&it
, w
, start
);
3974 int screen_full
= (it
.last_visible_y
3975 - next_screen_context_lines
* CANON_Y_UNIT (it
.f
));
3976 int direction
= n
< 0 ? -1 : 1;
3977 int dy
= direction
* screen_full
;
3979 /* Note that move_it_vertically always moves the iterator to the
3980 start of a line. So, if the last line doesn't have a newline,
3981 we would end up at the start of the line ending at ZV. */
3983 move_it_vertically_backward (&it
, -dy
);
3985 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
3986 MOVE_TO_POS
| MOVE_TO_Y
);
3989 move_it_by_lines (&it
, n
, 1);
3991 /* End if we end up at ZV or BEGV. */
3992 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
3993 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
3995 if (IT_CHARPOS (it
) == ZV
)
3997 if (it
.current_y
+ it
.max_ascent
+ it
.max_descent
3998 > it
.last_visible_y
)
3999 /* The last line was only partially visible, make it fully
4001 w
->vscroll
= (it
.last_visible_y
4002 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4006 Fsignal (Qend_of_buffer
, Qnil
);
4010 if (w
->vscroll
!= 0)
4011 /* The first line was only partially visible, make it fully
4017 Fsignal (Qbeginning_of_buffer
, Qnil
);
4020 /* If control gets here, then we vscrolled. */
4022 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4024 /* Don't try to change the window start below. */
4030 /* Set the window start, and set up the window for redisplay. */
4031 set_marker_restricted (w
->start
, make_number (IT_CHARPOS (it
)),
4033 w
->start_at_line_beg
= Fbolp ();
4034 w
->update_mode_line
= Qt
;
4035 XSETFASTINT (w
->last_modified
, 0);
4036 XSETFASTINT (w
->last_overlay_modified
, 0);
4037 /* Set force_start so that redisplay_window will run the
4038 window-scroll-functions. */
4039 w
->force_start
= Qt
;
4042 it
.current_y
= it
.vpos
= 0;
4044 /* Preserve the screen position if we must. */
4045 if (preserve_y
>= 0)
4047 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4048 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4052 /* Move PT out of scroll margins. */
4053 this_scroll_margin
= max (0, scroll_margin
);
4054 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
4055 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
4059 /* We moved the window start towards ZV, so PT may be now
4060 in the scroll margin at the top. */
4061 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4062 while (it
.current_y
< this_scroll_margin
)
4063 move_it_by_lines (&it
, 1, 1);
4064 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4068 int charpos
, bytepos
;
4070 /* We moved the window start towards BEGV, so PT may be now
4071 in the scroll margin at the bottom. */
4072 move_it_to (&it
, PT
, -1,
4073 it
.last_visible_y
- this_scroll_margin
- 1, -1,
4074 MOVE_TO_POS
| MOVE_TO_Y
);
4076 /* Save our position, in case it's correct. */
4077 charpos
= IT_CHARPOS (it
);
4078 bytepos
= IT_BYTEPOS (it
);
4080 /* See if point is on a partially visible line at the end. */
4081 move_it_by_lines (&it
, 1, 1);
4082 if (it
.current_y
> it
.last_visible_y
)
4083 /* The last line was only partially visible, so back up two
4084 lines to make sure we're on a fully visible line. */
4086 move_it_by_lines (&it
, -2, 0);
4087 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4090 /* No, the position we saved is OK, so use it. */
4091 SET_PT_BOTH (charpos
, bytepos
);
4097 /* Implementation of window_scroll that works based on screen lines.
4098 See the comment of window_scroll for parameter descriptions. */
4101 window_scroll_line_based (window
, n
, whole
, noerror
)
4107 register struct window
*w
= XWINDOW (window
);
4108 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4109 register int pos
, pos_byte
;
4110 register int ht
= window_internal_height (w
);
4111 register Lisp_Object tem
;
4115 struct position posit
;
4118 startpos
= marker_position (w
->start
);
4120 posit
= *compute_motion (startpos
, 0, 0, 0,
4122 window_internal_width (w
), XINT (w
->hscroll
),
4124 original_vpos
= posit
.vpos
;
4126 XSETFASTINT (tem
, PT
);
4127 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4131 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4136 lose
= n
< 0 && PT
== BEGV
;
4137 Fvertical_motion (make_number (n
), window
);
4141 SET_PT_BOTH (opoint
, opoint_byte
);
4148 Fsignal (Qbeginning_of_buffer
, Qnil
);
4153 int this_scroll_margin
= scroll_margin
;
4155 /* Don't use a scroll margin that is negative or too large. */
4156 if (this_scroll_margin
< 0)
4157 this_scroll_margin
= 0;
4159 if (XINT (w
->height
) < 4 * scroll_margin
)
4160 this_scroll_margin
= XINT (w
->height
) / 4;
4162 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4163 w
->start_at_line_beg
= bolp
;
4164 w
->update_mode_line
= Qt
;
4165 XSETFASTINT (w
->last_modified
, 0);
4166 XSETFASTINT (w
->last_overlay_modified
, 0);
4167 /* Set force_start so that redisplay_window will run
4168 the window-scroll-functions. */
4169 w
->force_start
= Qt
;
4171 if (whole
&& !NILP (Vscroll_preserve_screen_position
))
4173 SET_PT_BOTH (pos
, pos_byte
);
4174 Fvertical_motion (make_number (original_vpos
), window
);
4176 /* If we scrolled forward, put point enough lines down
4177 that it is outside the scroll margin. */
4182 if (this_scroll_margin
> 0)
4184 SET_PT_BOTH (pos
, pos_byte
);
4185 Fvertical_motion (make_number (this_scroll_margin
), window
);
4191 if (top_margin
<= opoint
)
4192 SET_PT_BOTH (opoint
, opoint_byte
);
4193 else if (!NILP (Vscroll_preserve_screen_position
))
4195 SET_PT_BOTH (pos
, pos_byte
);
4196 Fvertical_motion (make_number (original_vpos
), window
);
4199 SET_PT (top_margin
);
4205 /* If we scrolled backward, put point near the end of the window
4206 but not within the scroll margin. */
4207 SET_PT_BOTH (pos
, pos_byte
);
4208 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4209 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4212 bottom_margin
= PT
+ 1;
4214 if (bottom_margin
> opoint
)
4215 SET_PT_BOTH (opoint
, opoint_byte
);
4218 if (!NILP (Vscroll_preserve_screen_position
))
4220 SET_PT_BOTH (pos
, pos_byte
);
4221 Fvertical_motion (make_number (original_vpos
), window
);
4224 Fvertical_motion (make_number (-1), window
);
4233 Fsignal (Qend_of_buffer
, Qnil
);
4238 /* Scroll selected_window up or down. If N is nil, scroll a
4239 screen-full which is defined as the height of the window minus
4240 next_screen_context_lines. If N is the symbol `-', scroll.
4241 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
4242 up. This is the guts of Fscroll_up and Fscroll_down. */
4245 scroll_command (n
, direction
)
4249 register int defalt
;
4250 int count
= specpdl_ptr
- specpdl
;
4252 xassert (abs (direction
) == 1);
4254 /* If selected window's buffer isn't current, make it current for
4255 the moment. But don't screw up if window_scroll gets an error. */
4256 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
4258 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4259 Fset_buffer (XWINDOW (selected_window
)->buffer
);
4261 /* Make redisplay consider other windows than just selected_window. */
4262 ++windows_or_buffers_changed
;
4265 defalt
= (window_internal_height (XWINDOW (selected_window
))
4266 - next_screen_context_lines
);
4267 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
4270 window_scroll (selected_window
, defalt
, 1, 0);
4271 else if (EQ (n
, Qminus
))
4272 window_scroll (selected_window
, - defalt
, 1, 0);
4275 n
= Fprefix_numeric_value (n
);
4276 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
4279 unbind_to (count
, Qnil
);
4282 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
4283 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
4284 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4285 Negative ARG means scroll downward.\n\
4286 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4287 When calling from a program, supply as argument a number, nil, or `-'.")
4291 scroll_command (arg
, 1);
4295 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
4296 "Scroll text of current window down ARG lines; or near full screen if no ARG.\n\
4297 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4298 Negative ARG means scroll upward.\n\
4299 If ARG is the atom `-', scroll upward by nearly full screen.\n\
4300 When calling from a program, supply as argument a number, nil, or `-'.")
4304 scroll_command (arg
, -1);
4308 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
4309 "Return the other window for \"other window scroll\" commands.\n\
4310 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4311 specifies the window.\n\
4312 If `other-window-scroll-buffer' is non-nil, a window\n\
4313 showing that buffer is used.")
4318 if (MINI_WINDOW_P (XWINDOW (selected_window
))
4319 && !NILP (Vminibuf_scroll_window
))
4320 window
= Vminibuf_scroll_window
;
4321 /* If buffer is specified, scroll that buffer. */
4322 else if (!NILP (Vother_window_scroll_buffer
))
4324 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
4326 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
4330 /* Nothing specified; look for a neighboring window on the same
4332 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
4334 if (EQ (window
, selected_window
))
4335 /* That didn't get us anywhere; look for a window on another
4338 window
= Fnext_window (window
, Qnil
, Qt
);
4339 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
4340 && ! EQ (window
, selected_window
));
4343 CHECK_LIVE_WINDOW (window
, 0);
4345 if (EQ (window
, selected_window
))
4346 error ("There is no other window");
4351 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
4352 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
4353 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4354 The next window is the one below the current one; or the one at the top\n\
4355 if the current one is at the bottom. Negative ARG means scroll downward.\n\
4356 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4357 When calling from a program, supply as argument a number, nil, or `-'.\n\
4359 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4360 specifies the window to scroll.\n\
4361 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
4362 showing that buffer, popping the buffer up if necessary.")
4364 register Lisp_Object arg
;
4366 register Lisp_Object window
;
4367 register int defalt
;
4368 register struct window
*w
;
4369 register int count
= specpdl_ptr
- specpdl
;
4371 window
= Fother_window_for_scrolling ();
4373 w
= XWINDOW (window
);
4374 defalt
= window_internal_height (w
) - next_screen_context_lines
;
4375 if (defalt
< 1) defalt
= 1;
4377 /* Don't screw up if window_scroll gets an error. */
4378 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4379 ++windows_or_buffers_changed
;
4381 Fset_buffer (w
->buffer
);
4382 SET_PT (marker_position (w
->pointm
));
4385 window_scroll (window
, defalt
, 1, 1);
4386 else if (EQ (arg
, Qminus
))
4387 window_scroll (window
, -defalt
, 1, 1);
4392 CHECK_NUMBER (arg
, 0);
4393 window_scroll (window
, XINT (arg
), 0, 1);
4396 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
4397 unbind_to (count
, Qnil
);
4402 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
4403 "Scroll selected window display ARG columns left.\n\
4404 Default for ARG is window width minus 2.")
4406 register Lisp_Object arg
;
4410 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
4412 arg
= Fprefix_numeric_value (arg
);
4415 Fset_window_hscroll (selected_window
,
4416 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
4420 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
4421 "Scroll selected window display ARG columns right.\n\
4422 Default for ARG is window width minus 2.")
4424 register Lisp_Object arg
;
4427 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
4429 arg
= Fprefix_numeric_value (arg
);
4432 Fset_window_hscroll (selected_window
,
4433 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
4437 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
4438 "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\
4439 The desired position of point is always relative to the current window.\n\
4440 Just C-u as prefix means put point in the center of the window.\n\
4441 If ARG is omitted or nil, erases the entire frame and then\n\
4442 redraws with point in the center of the current window.")
4444 register Lisp_Object arg
;
4446 register struct window
*w
= XWINDOW (selected_window
);
4447 register int ht
= window_internal_height (w
);
4448 struct position pos
;
4449 struct buffer
*buf
= XBUFFER (w
->buffer
);
4450 struct buffer
*obuf
= current_buffer
;
4454 extern int frame_garbaged
;
4457 /* Invalidate pixel data calculated for all compositions. */
4458 for (i
= 0; i
< n_compositions
; i
++)
4459 composition_table
[i
]->font
= NULL
;
4461 Fredraw_frame (w
->frame
);
4462 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
4463 XSETFASTINT (arg
, ht
/ 2);
4465 else if (CONSP (arg
)) /* Just C-u. */
4467 XSETFASTINT (arg
, ht
/ 2);
4471 arg
= Fprefix_numeric_value (arg
);
4472 CHECK_NUMBER (arg
, 0);
4476 XSETINT (arg
, XINT (arg
) + ht
);
4478 set_buffer_internal (buf
);
4479 pos
= *vmotion (PT
, - XINT (arg
), w
);
4481 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
4482 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
4483 || FETCH_BYTE (pos
.bytepos
- 1) == '\n')
4485 w
->force_start
= Qt
;
4486 set_buffer_internal (obuf
);
4492 /* Value is the number of lines actually displayed in window W,
4493 as opposed to its height. */
4496 displayed_window_lines (w
)
4500 struct text_pos start
;
4501 int height
= window_box_height (w
);
4502 struct buffer
*old_buffer
;
4505 if (XBUFFER (w
->buffer
) != current_buffer
)
4507 old_buffer
= current_buffer
;
4508 set_buffer_internal (XBUFFER (w
->buffer
));
4513 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4514 start_display (&it
, w
, start
);
4515 move_it_vertically (&it
, height
);
4518 set_buffer_internal (old_buffer
);
4520 bottom_y
= it
.current_y
+ it
.max_ascent
+ it
.max_descent
;
4522 if (bottom_y
> it
.current_y
&& bottom_y
<= it
.last_visible_y
)
4523 /* Hit a line without a terminating newline. */
4526 /* Add in empty lines at the bottom of the window. */
4527 if (bottom_y
< height
)
4529 struct frame
*f
= XFRAME (w
->frame
);
4530 int rest
= height
- bottom_y
;
4531 int lines
= rest
/ CANON_Y_UNIT (f
);
4539 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
4541 "Return the height in lines of the text display area of WINDOW.\n\
4542 This doesn't include the mode-line (or header-line if any) or any\n\
4543 partial-height lines in the text display area.")
4547 struct window
*w
= decode_window (window
);
4548 int pixel_height
= window_box_height (w
);
4549 int line_height
= pixel_height
/ CANON_Y_UNIT (XFRAME (w
->frame
));
4550 return make_number (line_height
);
4555 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
4557 "Position point relative to window.\n\
4558 With no argument, position point at center of window.\n\
4559 An argument specifies vertical position within the window;\n\
4560 zero means top of window, negative means relative to bottom of window.")
4564 struct window
*w
= XWINDOW (selected_window
);
4568 window
= selected_window
;
4569 start
= marker_position (w
->start
);
4570 if (start
< BEGV
|| start
> ZV
)
4572 int height
= window_internal_height (w
);
4573 Fvertical_motion (make_number (- (height
/ 2)), window
);
4574 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
4575 w
->start_at_line_beg
= Fbolp ();
4576 w
->force_start
= Qt
;
4579 Fgoto_char (w
->start
);
4581 lines
= displayed_window_lines (w
);
4583 XSETFASTINT (arg
, lines
/ 2);
4586 arg
= Fprefix_numeric_value (arg
);
4588 XSETINT (arg
, XINT (arg
) + lines
);
4592 /* Skip past a partially visible first line. */
4593 XSETINT (arg
, XINT (arg
) + 1);
4595 return Fvertical_motion (arg
, window
);
4600 /***********************************************************************
4601 Window Configuration
4602 ***********************************************************************/
4604 struct save_window_data
4606 EMACS_INT size_from_Lisp_Vector_struct
;
4607 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4608 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
4609 Lisp_Object frame_tool_bar_lines
;
4610 Lisp_Object selected_frame
;
4611 Lisp_Object current_window
;
4612 Lisp_Object current_buffer
;
4613 Lisp_Object minibuf_scroll_window
;
4614 Lisp_Object root_window
;
4615 Lisp_Object focus_frame
;
4616 /* Record the values of window-min-width and window-min-height
4617 so that window sizes remain consistent with them. */
4618 Lisp_Object min_width
, min_height
;
4619 /* A vector, each of whose elements is a struct saved_window
4621 Lisp_Object saved_windows
;
4624 /* This is saved as a Lisp_Vector */
4627 /* these first two must agree with struct Lisp_Vector in lisp.h */
4628 EMACS_INT size_from_Lisp_Vector_struct
;
4629 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4632 Lisp_Object buffer
, start
, pointm
, mark
;
4633 Lisp_Object left
, top
, width
, height
, hscroll
, min_hscroll
;
4634 Lisp_Object parent
, prev
;
4635 Lisp_Object start_at_line_beg
;
4636 Lisp_Object display_table
;
4637 Lisp_Object orig_top
, orig_height
;
4640 #define SAVED_WINDOW_VECTOR_SIZE 17 /* Arg to Fmake_vector */
4642 #define SAVED_WINDOW_N(swv,n) \
4643 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
4645 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
4646 "Return t if OBJECT is a window-configuration object.")
4650 if (WINDOW_CONFIGURATIONP (object
))
4655 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
4656 "Return the frame that CONFIG, a window-configuration object, is about.")
4660 register struct save_window_data
*data
;
4661 struct Lisp_Vector
*saved_windows
;
4663 if (! WINDOW_CONFIGURATIONP (config
))
4664 wrong_type_argument (Qwindow_configuration_p
, config
);
4666 data
= (struct save_window_data
*) XVECTOR (config
);
4667 saved_windows
= XVECTOR (data
->saved_windows
);
4668 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4671 DEFUN ("set-window-configuration", Fset_window_configuration
,
4672 Sset_window_configuration
, 1, 1, 0,
4673 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
4674 CONFIGURATION must be a value previously returned\n\
4675 by `current-window-configuration' (which see).\n\
4676 If CONFIGURATION was made from a frame that is now deleted,\n\
4677 only frame-independent values can be restored. In this case,\n\
4678 the return value is nil. Otherwise the value is t.")
4680 Lisp_Object configuration
;
4682 register struct save_window_data
*data
;
4683 struct Lisp_Vector
*saved_windows
;
4684 Lisp_Object new_current_buffer
;
4689 while (!WINDOW_CONFIGURATIONP (configuration
))
4690 wrong_type_argument (Qwindow_configuration_p
, configuration
);
4692 data
= (struct save_window_data
*) XVECTOR (configuration
);
4693 saved_windows
= XVECTOR (data
->saved_windows
);
4695 new_current_buffer
= data
->current_buffer
;
4696 if (NILP (XBUFFER (new_current_buffer
)->name
))
4697 new_current_buffer
= Qnil
;
4700 if (XBUFFER (new_current_buffer
) == current_buffer
)
4704 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4707 /* If f is a dead frame, don't bother rebuilding its window tree.
4708 However, there is other stuff we should still try to do below. */
4709 if (FRAME_LIVE_P (f
))
4711 register struct window
*w
;
4712 register struct saved_window
*p
;
4713 struct window
*root_window
;
4714 struct window
**leaf_windows
;
4718 /* If the frame has been resized since this window configuration was
4719 made, we change the frame to the size specified in the
4720 configuration, restore the configuration, and then resize it
4721 back. We keep track of the prevailing height in these variables. */
4722 int previous_frame_height
= FRAME_HEIGHT (f
);
4723 int previous_frame_width
= FRAME_WIDTH (f
);
4724 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
4725 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
4727 /* The mouse highlighting code could get screwed up
4728 if it runs during this. */
4731 if (XFASTINT (data
->frame_height
) != previous_frame_height
4732 || XFASTINT (data
->frame_width
) != previous_frame_width
)
4733 change_frame_size (f
, XFASTINT (data
->frame_height
),
4734 XFASTINT (data
->frame_width
), 0, 0, 0);
4735 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4736 if (XFASTINT (data
->frame_menu_bar_lines
)
4737 != previous_frame_menu_bar_lines
)
4738 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
4739 #ifdef HAVE_WINDOW_SYSTEM
4740 if (XFASTINT (data
->frame_tool_bar_lines
)
4741 != previous_frame_tool_bar_lines
)
4742 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
4746 /* "Swap out" point from the selected window
4747 into its buffer. We do this now, before
4748 restoring the window contents, and prevent it from
4749 being done later on when we select a new window. */
4750 if (! NILP (XWINDOW (selected_window
)->buffer
))
4752 w
= XWINDOW (selected_window
);
4753 set_marker_both (w
->pointm
,
4755 BUF_PT (XBUFFER (w
->buffer
)),
4756 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4759 windows_or_buffers_changed
++;
4760 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4762 /* Problem: Freeing all matrices and later allocating them again
4763 is a serious redisplay flickering problem. What we would
4764 really like to do is to free only those matrices not reused
4766 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4768 = (struct window
**) alloca (count_windows (root_window
)
4769 * sizeof (struct window
*));
4770 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
4772 /* Temporarily avoid any problems with windows that are smaller
4773 than they are supposed to be. */
4774 window_min_height
= 1;
4775 window_min_width
= 1;
4778 Mark all windows now on frame as "deleted".
4779 Restoring the new configuration "undeletes" any that are in it.
4781 Save their current buffers in their height fields, since we may
4782 need it later, if a buffer saved in the configuration is now
4784 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
4786 for (k
= 0; k
< saved_windows
->size
; k
++)
4788 p
= SAVED_WINDOW_N (saved_windows
, k
);
4789 w
= XWINDOW (p
->window
);
4792 if (!NILP (p
->parent
))
4793 w
->parent
= SAVED_WINDOW_N (saved_windows
,
4794 XFASTINT (p
->parent
))->window
;
4798 if (!NILP (p
->prev
))
4800 w
->prev
= SAVED_WINDOW_N (saved_windows
,
4801 XFASTINT (p
->prev
))->window
;
4802 XWINDOW (w
->prev
)->next
= p
->window
;
4807 if (!NILP (w
->parent
))
4809 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
4811 XWINDOW (w
->parent
)->vchild
= p
->window
;
4812 XWINDOW (w
->parent
)->hchild
= Qnil
;
4816 XWINDOW (w
->parent
)->hchild
= p
->window
;
4817 XWINDOW (w
->parent
)->vchild
= Qnil
;
4822 /* If we squirreled away the buffer in the window's height,
4824 if (BUFFERP (w
->height
))
4825 w
->buffer
= w
->height
;
4828 w
->width
= p
->width
;
4829 w
->height
= p
->height
;
4830 w
->hscroll
= p
->hscroll
;
4831 w
->min_hscroll
= p
->min_hscroll
;
4832 w
->display_table
= p
->display_table
;
4833 w
->orig_top
= p
->orig_top
;
4834 w
->orig_height
= p
->orig_height
;
4835 XSETFASTINT (w
->last_modified
, 0);
4836 XSETFASTINT (w
->last_overlay_modified
, 0);
4838 /* Reinstall the saved buffer and pointers into it. */
4839 if (NILP (p
->buffer
))
4840 w
->buffer
= p
->buffer
;
4843 if (!NILP (XBUFFER (p
->buffer
)->name
))
4844 /* If saved buffer is alive, install it. */
4846 w
->buffer
= p
->buffer
;
4847 w
->start_at_line_beg
= p
->start_at_line_beg
;
4848 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
4849 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
4850 Fset_marker (XBUFFER (w
->buffer
)->mark
,
4851 p
->mark
, w
->buffer
);
4853 /* As documented in Fcurrent_window_configuration, don't
4854 save the location of point in the buffer which was current
4855 when the window configuration was recorded. */
4856 if (!EQ (p
->buffer
, new_current_buffer
)
4857 && XBUFFER (p
->buffer
) == current_buffer
)
4858 Fgoto_char (w
->pointm
);
4860 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
4861 /* Else unless window has a live buffer, get one. */
4863 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
4864 /* This will set the markers to beginning of visible
4866 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
4867 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
4868 w
->start_at_line_beg
= Qt
;
4871 /* Keeping window's old buffer; make sure the markers
4874 /* Set window markers at start of visible range. */
4875 if (XMARKER (w
->start
)->buffer
== 0)
4876 set_marker_restricted (w
->start
, make_number (0),
4878 if (XMARKER (w
->pointm
)->buffer
== 0)
4879 set_marker_restricted_both (w
->pointm
, w
->buffer
,
4880 BUF_PT (XBUFFER (w
->buffer
)),
4881 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4882 w
->start_at_line_beg
= Qt
;
4887 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
4888 /* Prevent "swapping out point" in the old selected window
4889 using the buffer that has been restored into it.
4890 That swapping out has already been done,
4891 near the beginning of this function. */
4892 selected_window
= Qnil
;
4893 Fselect_window (data
->current_window
);
4894 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
4897 if (NILP (data
->focus_frame
)
4898 || (FRAMEP (data
->focus_frame
)
4899 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
4900 Fredirect_frame_focus (frame
, data
->focus_frame
);
4902 #if 0 /* I don't understand why this is needed, and it causes problems
4903 when the frame's old selected window has been deleted. */
4904 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
4905 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
4909 /* Set the screen height to the value it had before this function. */
4910 if (previous_frame_height
!= FRAME_HEIGHT (f
)
4911 || previous_frame_width
!= FRAME_WIDTH (f
))
4912 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
4914 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4915 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
4916 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
4918 #ifdef HAVE_WINDOW_SYSTEM
4919 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
4920 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
4925 /* Now, free glyph matrices in windows that were not reused. */
4926 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
4928 if (NILP (leaf_windows
[i
]->buffer
))
4930 /* Assert it's not reused as a combination. */
4931 xassert (NILP (leaf_windows
[i
]->hchild
)
4932 && NILP (leaf_windows
[i
]->vchild
));
4933 free_window_matrices (leaf_windows
[i
]);
4934 SET_FRAME_GARBAGED (f
);
4936 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
4940 /* If more than one window shows the new and old current buffer,
4941 don't try to preserve point in that buffer. */
4942 if (old_point
> 0 && n
> 1)
4949 /* Fselect_window will have made f the selected frame, so we
4950 reselect the proper frame here. Fhandle_switch_frame will change the
4951 selected window too, but that doesn't make the call to
4952 Fselect_window above totally superfluous; it still sets f's
4954 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
4955 do_switch_frame (data
->selected_frame
, Qnil
, 0);
4957 if (! NILP (Vwindow_configuration_change_hook
)
4958 && ! NILP (Vrun_hooks
))
4959 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4962 if (!NILP (new_current_buffer
))
4964 Fset_buffer (new_current_buffer
);
4966 /* If the buffer that is current now is the same
4967 that was current before setting the window configuration,
4968 don't alter its PT. */
4973 /* Restore the minimum heights recorded in the configuration. */
4974 window_min_height
= XINT (data
->min_height
);
4975 window_min_width
= XINT (data
->min_width
);
4977 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
4979 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
4982 /* Mark all windows now on frame as deleted
4983 by setting their buffers to nil. */
4986 delete_all_subwindows (w
)
4987 register struct window
*w
;
4989 if (!NILP (w
->next
))
4990 delete_all_subwindows (XWINDOW (w
->next
));
4991 if (!NILP (w
->vchild
))
4992 delete_all_subwindows (XWINDOW (w
->vchild
));
4993 if (!NILP (w
->hchild
))
4994 delete_all_subwindows (XWINDOW (w
->hchild
));
4996 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
4998 if (!NILP (w
->buffer
))
5001 /* We set all three of these fields to nil, to make sure that we can
5002 distinguish this dead window from any live window. Live leaf
5003 windows will have buffer set, and combination windows will have
5004 vchild or hchild set. */
5009 Vwindow_list
= Qnil
;
5013 count_windows (window
)
5014 register struct window
*window
;
5016 register int count
= 1;
5017 if (!NILP (window
->next
))
5018 count
+= count_windows (XWINDOW (window
->next
));
5019 if (!NILP (window
->vchild
))
5020 count
+= count_windows (XWINDOW (window
->vchild
));
5021 if (!NILP (window
->hchild
))
5022 count
+= count_windows (XWINDOW (window
->hchild
));
5027 /* Fill vector FLAT with leaf windows under W, starting at index I.
5028 Value is last index + 1. */
5031 get_leaf_windows (w
, flat
, i
)
5033 struct window
**flat
;
5038 if (!NILP (w
->hchild
))
5039 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
5040 else if (!NILP (w
->vchild
))
5041 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
5045 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5052 /* Return a pointer to the glyph W's physical cursor is on. Value is
5053 null if W's current matrix is invalid, so that no meaningfull glyph
5057 get_phys_cursor_glyph (w
)
5060 struct glyph_row
*row
;
5061 struct glyph
*glyph
;
5063 if (w
->phys_cursor
.vpos
>= 0
5064 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
5065 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
5067 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
5068 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
5077 save_window_save (window
, vector
, i
)
5079 struct Lisp_Vector
*vector
;
5082 register struct saved_window
*p
;
5083 register struct window
*w
;
5084 register Lisp_Object tem
;
5086 for (;!NILP (window
); window
= w
->next
)
5088 p
= SAVED_WINDOW_N (vector
, i
);
5089 w
= XWINDOW (window
);
5091 XSETFASTINT (w
->temslot
, i
++);
5093 p
->buffer
= w
->buffer
;
5096 p
->width
= w
->width
;
5097 p
->height
= w
->height
;
5098 p
->hscroll
= w
->hscroll
;
5099 p
->min_hscroll
= w
->min_hscroll
;
5100 p
->display_table
= w
->display_table
;
5101 p
->orig_top
= w
->orig_top
;
5102 p
->orig_height
= w
->orig_height
;
5103 if (!NILP (w
->buffer
))
5105 /* Save w's value of point in the window configuration.
5106 If w is the selected window, then get the value of point
5107 from the buffer; pointm is garbage in the selected window. */
5108 if (EQ (window
, selected_window
))
5110 p
->pointm
= Fmake_marker ();
5111 set_marker_both (p
->pointm
, w
->buffer
,
5112 BUF_PT (XBUFFER (w
->buffer
)),
5113 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5116 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
5118 p
->start
= Fcopy_marker (w
->start
, Qnil
);
5119 p
->start_at_line_beg
= w
->start_at_line_beg
;
5121 tem
= XBUFFER (w
->buffer
)->mark
;
5122 p
->mark
= Fcopy_marker (tem
, Qnil
);
5129 p
->start_at_line_beg
= Qnil
;
5132 if (NILP (w
->parent
))
5135 p
->parent
= XWINDOW (w
->parent
)->temslot
;
5140 p
->prev
= XWINDOW (w
->prev
)->temslot
;
5142 if (!NILP (w
->vchild
))
5143 i
= save_window_save (w
->vchild
, vector
, i
);
5144 if (!NILP (w
->hchild
))
5145 i
= save_window_save (w
->hchild
, vector
, i
);
5151 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
5152 Scurrent_window_configuration
, 0, 1, 0,
5153 "Return an object representing the current window configuration of FRAME.\n\
5154 If FRAME is nil or omitted, use the selected frame.\n\
5155 This describes the number of windows, their sizes and current buffers,\n\
5156 and for each displayed buffer, where display starts, and the positions of\n\
5157 point and mark. An exception is made for point in the current buffer:\n\
5158 its value is -not- saved.\n\
5159 This also records the currently selected frame, and FRAME's focus\n\
5160 redirection (see `redirect-frame-focus').")
5164 register Lisp_Object tem
;
5165 register int n_windows
;
5166 register struct save_window_data
*data
;
5167 register struct Lisp_Vector
*vec
;
5172 frame
= selected_frame
;
5173 CHECK_LIVE_FRAME (frame
, 0);
5176 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5177 vec
= allocate_vectorlike (VECSIZE (struct save_window_data
));
5178 for (i
= 0; i
< VECSIZE (struct save_window_data
); i
++)
5179 vec
->contents
[i
] = Qnil
;
5180 vec
->size
= VECSIZE (struct save_window_data
);
5181 data
= (struct save_window_data
*)vec
;
5183 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
5184 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
5185 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
5186 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
5187 data
->selected_frame
= selected_frame
;
5188 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
5189 XSETBUFFER (data
->current_buffer
, current_buffer
);
5190 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
5191 data
->root_window
= FRAME_ROOT_WINDOW (f
);
5192 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
5193 XSETINT (data
->min_height
, window_min_height
);
5194 XSETINT (data
->min_width
, window_min_width
);
5195 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
5196 data
->saved_windows
= tem
;
5197 for (i
= 0; i
< n_windows
; i
++)
5198 XVECTOR (tem
)->contents
[i
]
5199 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
5200 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
5201 XSETWINDOW_CONFIGURATION (tem
, data
);
5205 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
5207 "Execute body, preserving window sizes and contents.\n\
5208 Restore which buffer appears in which window, where display starts,\n\
5209 and the value of point and mark for each window.\n\
5210 Also restore the choice of selected window.\n\
5211 Also restore which buffer is current.\n\
5212 Does not restore the value of point in current buffer.")
5216 register Lisp_Object val
;
5217 register int count
= specpdl_ptr
- specpdl
;
5219 record_unwind_protect (Fset_window_configuration
,
5220 Fcurrent_window_configuration (Qnil
));
5221 val
= Fprogn (args
);
5222 return unbind_to (count
, val
);
5226 /***********************************************************************
5228 ***********************************************************************/
5230 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
5232 "Set width of marginal areas of window WINDOW.\n\
5233 If window is nil, set margins of the currently selected window.\n\
5234 First parameter LEFT-WIDTH specifies the number of character\n\
5235 cells to reserve for the left marginal area. Second parameter\n\
5236 RIGHT-WIDTH does the same for the right marginal area.\n\
5237 A nil width parameter means no margin.")
5238 (window
, left
, right
)
5239 Lisp_Object window
, left
, right
;
5241 struct window
*w
= decode_window (window
);
5244 CHECK_NUMBER_OR_FLOAT (left
, 1);
5246 CHECK_NUMBER_OR_FLOAT (right
, 2);
5248 /* Check widths < 0 and translate a zero width to nil.
5249 Margins that are too wide have to be checked elsewhere. */
5250 if ((INTEGERP (left
) && XINT (left
) < 0)
5251 || (FLOATP (left
) && XFLOAT_DATA (left
) <= 0))
5252 XSETFASTINT (left
, 0);
5253 if (INTEGERP (left
) && XFASTINT (left
) == 0)
5256 if ((INTEGERP (right
) && XINT (right
) < 0)
5257 || (FLOATP (right
) && XFLOAT_DATA (right
) <= 0))
5258 XSETFASTINT (right
, 0);
5259 if (INTEGERP (right
) && XFASTINT (right
) == 0)
5262 w
->left_margin_width
= left
;
5263 w
->right_margin_width
= right
;
5265 ++windows_or_buffers_changed
;
5266 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
5271 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
5273 "Get width of marginal areas of window WINDOW.\n\
5274 If WINDOW is omitted or nil, use the currently selected window.\n\
5275 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).\n\
5276 If a marginal area does not exist, its width will be returned\n\
5281 struct window
*w
= decode_window (window
);
5282 return Fcons (w
->left_margin_width
, w
->right_margin_width
);
5287 /***********************************************************************
5289 ***********************************************************************/
5291 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 1, 0,
5292 "Return the amount by which WINDOW is scrolled vertically.\n\
5293 Use the selected window if WINDOW is nil or omitted.\n\
5294 Value is a multiple of the canonical character height of WINDOW.")
5303 window
= selected_window
;
5305 CHECK_WINDOW (window
, 0);
5306 w
= XWINDOW (window
);
5307 f
= XFRAME (w
->frame
);
5309 if (FRAME_WINDOW_P (f
))
5310 result
= CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
);
5312 result
= make_number (0);
5317 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
5319 "Set amount by which WINDOW should be scrolled vertically to VSCROLL.\n\
5320 WINDOW nil or omitted means use the selected window. VSCROLL is a\n\
5321 non-negative multiple of the canonical character height of WINDOW.")
5323 Lisp_Object window
, vscroll
;
5329 window
= selected_window
;
5331 CHECK_WINDOW (window
, 0);
5332 CHECK_NUMBER_OR_FLOAT (vscroll
, 1);
5334 w
= XWINDOW (window
);
5335 f
= XFRAME (w
->frame
);
5337 if (FRAME_WINDOW_P (f
))
5339 int old_dy
= w
->vscroll
;
5341 w
->vscroll
= - CANON_Y_UNIT (f
) * XFLOATINT (vscroll
);
5342 w
->vscroll
= min (w
->vscroll
, 0);
5344 /* Adjust glyph matrix of the frame if the virtual display
5345 area becomes larger than before. */
5346 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
5349 /* Prevent redisplay shortcuts. */
5350 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5353 return Fwindow_vscroll (window
);
5357 /* Call FN for all leaf windows on frame F. FN is called with the
5358 first argument being a pointer to the leaf window, and with
5359 additional argument USER_DATA. Stops when FN returns 0. */
5362 foreach_window (f
, fn
, user_data
)
5364 int (* fn
) P_ ((struct window
*, void *));
5367 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
5371 /* Helper function for foreach_window. Call FN for all leaf windows
5372 reachable from W. FN is called with the first argument being a
5373 pointer to the leaf window, and with additional argument USER_DATA.
5374 Stop when FN returns 0. Value is 0 if stopped by FN. */
5377 foreach_window_1 (w
, fn
, user_data
)
5379 int (* fn
) P_ ((struct window
*, void *));
5384 for (cont
= 1; w
&& cont
;)
5386 if (!NILP (w
->hchild
))
5387 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
5388 else if (!NILP (w
->vchild
))
5389 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
5391 cont
= fn (w
, user_data
);
5393 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5400 /* Freeze or unfreeze the window start of W if unless it is a
5401 mini-window or the selected window. FREEZE_P non-null means freeze
5402 the window start. */
5405 freeze_window_start (w
, freeze_p
)
5409 if (w
== XWINDOW (selected_window
)
5410 || MINI_WINDOW_P (w
)
5411 || (MINI_WINDOW_P (XWINDOW (selected_window
))
5412 && ! NILP (Vminibuf_scroll_window
)
5413 && w
== XWINDOW (Vminibuf_scroll_window
)))
5416 w
->frozen_window_start_p
= freeze_p
!= NULL
;
5421 /* Freeze or unfreeze the window starts of all leaf windows on frame
5422 F, except the selected window and a mini-window. FREEZE_P non-zero
5423 means freeze the window start. */
5426 freeze_window_starts (f
, freeze_p
)
5430 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
5434 /***********************************************************************
5436 ***********************************************************************/
5438 /* Return 1 if window configurations C1 and C2
5439 describe the same state of affairs. This is used by Fequal. */
5442 compare_window_configurations (c1
, c2
, ignore_positions
)
5444 int ignore_positions
;
5446 register struct save_window_data
*d1
, *d2
;
5447 struct Lisp_Vector
*sw1
, *sw2
;
5450 if (!WINDOW_CONFIGURATIONP (c1
))
5451 wrong_type_argument (Qwindow_configuration_p
, c1
);
5452 if (!WINDOW_CONFIGURATIONP (c2
))
5453 wrong_type_argument (Qwindow_configuration_p
, c2
);
5455 d1
= (struct save_window_data
*) XVECTOR (c1
);
5456 d2
= (struct save_window_data
*) XVECTOR (c2
);
5457 sw1
= XVECTOR (d1
->saved_windows
);
5458 sw2
= XVECTOR (d2
->saved_windows
);
5460 if (! EQ (d1
->frame_width
, d2
->frame_width
))
5462 if (! EQ (d1
->frame_height
, d2
->frame_height
))
5464 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
5466 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
5468 /* Don't compare the current_window field directly.
5469 Instead see w1_is_current and w2_is_current, below. */
5470 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
5472 if (! ignore_positions
)
5473 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
5475 /* Don't compare the root_window field.
5476 We don't require the two configurations
5477 to use the same window object,
5478 and the two root windows must be equivalent
5479 if everything else compares equal. */
5480 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
5482 if (! EQ (d1
->min_width
, d2
->min_width
))
5484 if (! EQ (d1
->min_height
, d2
->min_height
))
5487 /* Verify that the two confis have the same number of windows. */
5488 if (sw1
->size
!= sw2
->size
)
5491 for (i
= 0; i
< sw1
->size
; i
++)
5493 struct saved_window
*p1
, *p2
;
5494 int w1_is_current
, w2_is_current
;
5496 p1
= SAVED_WINDOW_N (sw1
, i
);
5497 p2
= SAVED_WINDOW_N (sw2
, i
);
5499 /* Verify that the current windows in the two
5500 configurations correspond to each other. */
5501 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
5502 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
5504 if (w1_is_current
!= w2_is_current
)
5507 /* Verify that the corresponding windows do match. */
5508 if (! EQ (p1
->buffer
, p2
->buffer
))
5510 if (! EQ (p1
->left
, p2
->left
))
5512 if (! EQ (p1
->top
, p2
->top
))
5514 if (! EQ (p1
->width
, p2
->width
))
5516 if (! EQ (p1
->height
, p2
->height
))
5518 if (! EQ (p1
->display_table
, p2
->display_table
))
5520 if (! EQ (p1
->parent
, p2
->parent
))
5522 if (! EQ (p1
->prev
, p2
->prev
))
5524 if (! ignore_positions
)
5526 if (! EQ (p1
->hscroll
, p2
->hscroll
))
5528 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
5530 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
5532 if (NILP (Fequal (p1
->start
, p2
->start
)))
5534 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
5536 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
5544 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
5545 Scompare_window_configurations
, 2, 2, 0,
5546 "Compare two window configurations as regards the structure of windows.\n\
5547 This function ignores details such as the values of point and mark\n\
5548 and scrolling positions.")
5552 if (compare_window_configurations (x
, y
, 1))
5560 struct frame
*f
= make_terminal_frame ();
5561 XSETFRAME (selected_frame
, f
);
5562 Vterminal_frame
= selected_frame
;
5563 minibuf_window
= f
->minibuffer_window
;
5564 selected_window
= f
->selected_window
;
5565 last_nonminibuf_frame
= f
;
5567 window_initialized
= 1;
5573 Vwindow_list
= Qnil
;
5579 Qleft_bitmap_area
= intern ("left-bitmap-area");
5580 staticpro (&Qleft_bitmap_area
);
5581 Qright_bitmap_area
= intern ("right-bitmap-area");
5582 staticpro (&Qright_bitmap_area
);
5584 Qwindow_size_fixed
= intern ("window-size-fixed");
5585 staticpro (&Qwindow_size_fixed
);
5587 staticpro (&Qwindow_configuration_change_hook
);
5588 Qwindow_configuration_change_hook
5589 = intern ("window-configuration-change-hook");
5591 Qwindowp
= intern ("windowp");
5592 staticpro (&Qwindowp
);
5594 Qwindow_configuration_p
= intern ("window-configuration-p");
5595 staticpro (&Qwindow_configuration_p
);
5597 Qwindow_live_p
= intern ("window-live-p");
5598 staticpro (&Qwindow_live_p
);
5600 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
5601 staticpro (&Qtemp_buffer_show_hook
);
5603 staticpro (&Vwindow_list
);
5605 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
5606 "Non-nil means call as function to display a help buffer.\n\
5607 The function is called with one argument, the buffer to be displayed.\n\
5608 Used by `with-output-to-temp-buffer'.\n\
5609 If this function is used, then it must do the entire job of showing\n\
5610 the buffer; `temp-buffer-show-hook' is not run unless this function runs it.");
5611 Vtemp_buffer_show_function
= Qnil
;
5613 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
5614 "If non-nil, function to call to handle `display-buffer'.\n\
5615 It will receive two args, the buffer and a flag which if non-nil means\n\
5616 that the currently selected window is not acceptable.\n\
5617 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
5618 work using this function.");
5619 Vdisplay_buffer_function
= Qnil
;
5621 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
5622 "*If non-nil, `display-buffer' should even the window heights.\n\
5623 If nil, `display-buffer' will leave the window configuration alone.");
5624 Veven_window_heights
= Qt
;
5626 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
5627 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
5628 Vminibuf_scroll_window
= Qnil
;
5630 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
5631 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
5632 Vother_window_scroll_buffer
= Qnil
;
5634 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
5635 "*Non-nil means `display-buffer' should make a separate frame.");
5638 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
5639 "*Non-nil means `display-buffer' should reuse frames.\n\
5640 If the buffer in question is already displayed in a frame, raise that frame.");
5641 display_buffer_reuse_frames
= 0;
5643 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
5644 "Function to call to handle automatic new frame creation.\n\
5645 It is called with no arguments and should return a newly created frame.\n\
5647 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
5648 where `pop-up-frame-alist' would hold the default frame parameters.");
5649 Vpop_up_frame_function
= Qnil
;
5651 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
5652 "*List of buffer names that should have their own special frames.\n\
5653 Displaying a buffer whose name is in this list makes a special frame for it\n\
5654 using `special-display-function'. See also `special-display-regexps'.\n\
5656 An element of the list can be a list instead of just a string.\n\
5657 There are two ways to use a list as an element:\n\
5658 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\
5659 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5660 In the latter case, FUNCTION is called with BUFFER as the first argument,\n\
5661 followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\
5662 All this is done by the function found in `special-display-function'.\n\
5664 If this variable appears \"not to work\", because you add a name to it\n\
5665 but that buffer still appears in the selected window, look at the\n\
5666 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5667 Those variables take precedence over this one.");
5668 Vspecial_display_buffer_names
= Qnil
;
5670 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
5671 "*List of regexps saying which buffers should have their own special frames.\n\
5672 If a buffer name matches one of these regexps, it gets its own frame.\n\
5673 Displaying a buffer whose name is in this list makes a special frame for it\n\
5674 using `special-display-function'.\n\
5676 An element of the list can be a list instead of just a string.\n\
5677 There are two ways to use a list as an element:\n\
5678 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\
5679 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5680 In the latter case, FUNCTION is called with the buffer as first argument,\n\
5681 followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\
5682 All this is done by the function found in `special-display-function'.\n\
5684 If this variable appears \"not to work\", because you add a regexp to it\n\
5685 but the matching buffers still appear in the selected window, look at the\n\
5686 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5687 Those variables take precedence over this one.");
5688 Vspecial_display_regexps
= Qnil
;
5690 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
5691 "Function to call to make a new frame for a special buffer.\n\
5692 It is called with two arguments, the buffer and optional buffer specific\n\
5693 data, and should return a window displaying that buffer.\n\
5694 The default value makes a separate frame for the buffer,\n\
5695 using `special-display-frame-alist' to specify the frame parameters.\n\
5697 A buffer is special if its is listed in `special-display-buffer-names'\n\
5698 or matches a regexp in `special-display-regexps'.");
5699 Vspecial_display_function
= Qnil
;
5701 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
5702 "*List of buffer names that should appear in the selected window.\n\
5703 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\
5704 switches to it in the selected window, rather than making it appear\n\
5705 in some other window.\n\
5707 An element of the list can be a cons cell instead of just a string.\n\
5708 Then the car must be a string, which specifies the buffer name.\n\
5709 This is for compatibility with `special-display-buffer-names';\n\
5710 the cdr of the cons cell is ignored.\n\
5712 See also `same-window-regexps'.");
5713 Vsame_window_buffer_names
= Qnil
;
5715 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
5716 "*List of regexps saying which buffers should appear in the selected window.\n\
5717 If a buffer name matches one of these regexps, then displaying it\n\
5718 using `display-buffer' or `pop-to-buffer' switches to it\n\
5719 in the selected window, rather than making it appear in some other window.\n\
5721 An element of the list can be a cons cell instead of just a string.\n\
5722 Then the car must be a string, which specifies the buffer name.\n\
5723 This is for compatibility with `special-display-buffer-names';\n\
5724 the cdr of the cons cell is ignored.\n\
5726 See also `same-window-buffer-names'.");
5727 Vsame_window_regexps
= Qnil
;
5729 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
5730 "*Non-nil means display-buffer should make new windows.");
5733 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
5734 "*Number of lines of continuity when scrolling by screenfuls.");
5735 next_screen_context_lines
= 2;
5737 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
5738 "*display-buffer would prefer to split the largest window if this large.\n\
5739 If there is only one window, it is split regardless of this value.");
5740 split_height_threshold
= 500;
5742 DEFVAR_INT ("window-min-height", &window_min_height
,
5743 "*Delete any window less than this tall (including its mode line).");
5744 window_min_height
= 4;
5746 DEFVAR_INT ("window-min-width", &window_min_width
,
5747 "*Delete any window less than this wide.");
5748 window_min_width
= 10;
5750 DEFVAR_LISP ("scroll-preserve-screen-position",
5751 &Vscroll_preserve_screen_position
,
5752 "*Nonzero means scroll commands move point to keep its screen line unchanged.");
5753 Vscroll_preserve_screen_position
= Qnil
;
5755 DEFVAR_LISP ("window-configuration-change-hook",
5756 &Vwindow_configuration_change_hook
,
5757 "Functions to call when window configuration changes.\n\
5758 The selected frame is the one whose configuration has changed.");
5759 Vwindow_configuration_change_hook
= Qnil
;
5761 defsubr (&Sselected_window
);
5762 defsubr (&Sminibuffer_window
);
5763 defsubr (&Swindow_minibuffer_p
);
5764 defsubr (&Swindowp
);
5765 defsubr (&Swindow_live_p
);
5766 defsubr (&Spos_visible_in_window_p
);
5767 defsubr (&Swindow_buffer
);
5768 defsubr (&Swindow_height
);
5769 defsubr (&Swindow_width
);
5770 defsubr (&Swindow_hscroll
);
5771 defsubr (&Sset_window_hscroll
);
5772 defsubr (&Swindow_redisplay_end_trigger
);
5773 defsubr (&Sset_window_redisplay_end_trigger
);
5774 defsubr (&Swindow_edges
);
5775 defsubr (&Scoordinates_in_window_p
);
5776 defsubr (&Swindow_at
);
5777 defsubr (&Swindow_point
);
5778 defsubr (&Swindow_start
);
5779 defsubr (&Swindow_end
);
5780 defsubr (&Sset_window_point
);
5781 defsubr (&Sset_window_start
);
5782 defsubr (&Swindow_dedicated_p
);
5783 defsubr (&Sset_window_dedicated_p
);
5784 defsubr (&Swindow_display_table
);
5785 defsubr (&Sset_window_display_table
);
5786 defsubr (&Snext_window
);
5787 defsubr (&Sprevious_window
);
5788 defsubr (&Sother_window
);
5789 defsubr (&Sget_lru_window
);
5790 defsubr (&Sget_largest_window
);
5791 defsubr (&Sget_buffer_window
);
5792 defsubr (&Sdelete_other_windows
);
5793 defsubr (&Sdelete_windows_on
);
5794 defsubr (&Sreplace_buffer_in_windows
);
5795 defsubr (&Sdelete_window
);
5796 defsubr (&Sset_window_buffer
);
5797 defsubr (&Sselect_window
);
5798 defsubr (&Sspecial_display_p
);
5799 defsubr (&Ssame_window_p
);
5800 defsubr (&Sdisplay_buffer
);
5801 defsubr (&Ssplit_window
);
5802 defsubr (&Senlarge_window
);
5803 defsubr (&Sshrink_window
);
5804 defsubr (&Sscroll_up
);
5805 defsubr (&Sscroll_down
);
5806 defsubr (&Sscroll_left
);
5807 defsubr (&Sscroll_right
);
5808 defsubr (&Sother_window_for_scrolling
);
5809 defsubr (&Sscroll_other_window
);
5810 defsubr (&Srecenter
);
5811 defsubr (&Swindow_text_height
);
5812 defsubr (&Smove_to_window_line
);
5813 defsubr (&Swindow_configuration_p
);
5814 defsubr (&Swindow_configuration_frame
);
5815 defsubr (&Sset_window_configuration
);
5816 defsubr (&Scurrent_window_configuration
);
5817 defsubr (&Ssave_window_excursion
);
5818 defsubr (&Sset_window_margins
);
5819 defsubr (&Swindow_margins
);
5820 defsubr (&Swindow_vscroll
);
5821 defsubr (&Sset_window_vscroll
);
5822 defsubr (&Scompare_window_configurations
);
5823 defsubr (&Swindow_list
);
5829 initial_define_key (control_x_map
, '1', "delete-other-windows");
5830 initial_define_key (control_x_map
, '2', "split-window");
5831 initial_define_key (control_x_map
, '0', "delete-window");
5832 initial_define_key (control_x_map
, 'o', "other-window");
5833 initial_define_key (control_x_map
, '^', "enlarge-window");
5834 initial_define_key (control_x_map
, '<', "scroll-left");
5835 initial_define_key (control_x_map
, '>', "scroll-right");
5837 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
5838 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
5839 initial_define_key (meta_map
, 'v', "scroll-down");
5841 initial_define_key (global_map
, Ctl('L'), "recenter");
5842 initial_define_key (meta_map
, 'r', "move-to-window-line");