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 UPDATE 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 f
= XFRAME (WINDOW_FRAME (p
));
1192 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1194 /* Are we trying to delete any frame's selected window? */
1196 Lisp_Object 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 pwindow
= FRAME_SELECTED_WINDOW (f
);
1203 while (!NILP (pwindow
))
1205 if (EQ (window
, pwindow
))
1207 pwindow
= XWINDOW (pwindow
)->parent
;
1210 if (EQ (window
, pwindow
))
1212 Lisp_Object alternative
;
1213 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
1215 /* If we're about to delete the selected window on the
1216 selected frame, then we should use Fselect_window to select
1217 the new window. On the other hand, if we're about to
1218 delete the selected window on any other frame, we shouldn't do
1219 anything but set the frame's selected_window slot. */
1220 if (EQ (window
, selected_window
))
1221 Fselect_window (alternative
);
1223 FRAME_SELECTED_WINDOW (f
) = alternative
;
1228 /* tem is null for dummy parent windows
1229 (which have inferiors but not any contents themselves) */
1233 unchain_marker (p
->pointm
);
1234 unchain_marker (p
->start
);
1237 /* Free window glyph matrices. It is sure that they are allocated
1238 again when ADJUST_GLYPHS is called. Block input so that expose
1239 events and other events that access glyph matrices are not
1240 processed while we are changing them. */
1242 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1246 XWINDOW (tem
)->prev
= p
->prev
;
1250 XWINDOW (tem
)->next
= p
->next
;
1252 if (EQ (window
, par
->hchild
))
1253 par
->hchild
= p
->next
;
1254 if (EQ (window
, par
->vchild
))
1255 par
->vchild
= p
->next
;
1257 /* Find one of our siblings to give our space to. */
1261 /* If p gives its space to its next sibling, that sibling needs
1262 to have its top/left side pulled back to where p's is.
1263 set_window_{height,width} will re-position the sibling's
1266 XWINDOW (sib
)->top
= p
->top
;
1267 XWINDOW (sib
)->left
= p
->left
;
1270 /* Stretch that sibling. */
1271 if (!NILP (par
->vchild
))
1272 set_window_height (sib
,
1273 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
1275 if (!NILP (par
->hchild
))
1276 set_window_width (sib
,
1277 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
1280 /* If parent now has only one child,
1281 put the child into the parent's place. */
1285 if (NILP (XWINDOW (tem
)->next
))
1286 replace_window (parent
, tem
);
1288 /* Since we may be deleting combination windows, we must make sure that
1289 not only p but all its children have been marked as deleted. */
1290 if (! NILP (p
->hchild
))
1291 delete_all_subwindows (XWINDOW (p
->hchild
));
1292 else if (! NILP (p
->vchild
))
1293 delete_all_subwindows (XWINDOW (p
->vchild
));
1295 /* Mark this window as deleted. */
1296 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1298 /* Adjust glyph matrices. */
1305 /***********************************************************************
1307 ***********************************************************************/
1309 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1310 pointer. This is a callback function for foreach_window, used in
1311 function window_list. */
1314 add_window_to_list (w
, user_data
)
1318 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1320 XSETWINDOW (window
, w
);
1321 *list
= Fcons (window
, *list
);
1326 /* Return a list of all windows, for use by next_window. If
1327 Vwindow_list is a list, return that list. Otherwise, build a new
1328 list, cache it in Vwindow_list, and return that. */
1333 if (!CONSP (Vwindow_list
))
1337 Vwindow_list
= Qnil
;
1338 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1340 Lisp_Object args
[2];
1342 /* We are visiting windows in canonical order, and add
1343 new windows at the front of args[1], which means we
1344 have to reverse this list at the end. */
1346 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1347 args
[0] = Vwindow_list
;
1348 args
[1] = Fnreverse (args
[1]);
1349 Vwindow_list
= Fnconc (2, args
);
1353 return Vwindow_list
;
1357 /* Value is non-zero if WINDOW satisfies the constraints given by
1358 OWINDOW, MINIBUF and ALL_FRAMES.
1360 MINIBUF t means WINDOW may be minibuffer windows.
1361 `lambda' means WINDOW may not be a minibuffer window.
1362 a window means a specific minibuffer window
1364 ALL_FRAMES t means search all frames,
1365 nil means search just current frame,
1366 `visible' means search just visible frames,
1367 0 means search visible and iconified frames,
1368 a window means search the frame that window belongs to,
1369 a frame means consider windows on that frame, only. */
1372 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1373 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1375 struct window
*w
= XWINDOW (window
);
1376 struct frame
*f
= XFRAME (w
->frame
);
1377 int candidate_p
= 1;
1379 if (!BUFFERP (w
->buffer
))
1381 else if (MINI_WINDOW_P (w
)
1382 && (EQ (minibuf
, Qlambda
)
1383 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1385 /* If MINIBUF is `lambda' don't consider any mini-windows.
1386 If it is a window, consider only that one. */
1389 else if (EQ (all_frames
, Qt
))
1391 else if (NILP (all_frames
))
1393 xassert (WINDOWP (owindow
));
1394 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1396 else if (EQ (all_frames
, Qvisible
))
1398 FRAME_SAMPLE_VISIBILITY (f
);
1399 candidate_p
= FRAME_VISIBLE_P (f
);
1401 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1403 FRAME_SAMPLE_VISIBILITY (f
);
1404 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1406 else if (WINDOWP (all_frames
))
1407 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1408 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1409 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1410 else if (FRAMEP (all_frames
))
1411 candidate_p
= EQ (all_frames
, w
->frame
);
1417 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1418 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1422 decode_next_window_args (window
, minibuf
, all_frames
)
1423 Lisp_Object
*window
, *minibuf
, *all_frames
;
1426 *window
= selected_window
;
1428 CHECK_LIVE_WINDOW (*window
, 0);
1430 /* MINIBUF nil may or may not include minibuffers. Decide if it
1432 if (NILP (*minibuf
))
1433 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1434 else if (!EQ (*minibuf
, Qt
))
1437 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1438 => count none of them, or a specific minibuffer window (the
1439 active one) to count. */
1441 /* ALL_FRAMES nil doesn't specify which frames to include. */
1442 if (NILP (*all_frames
))
1443 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1444 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1446 else if (EQ (*all_frames
, Qvisible
))
1448 else if (XFASTINT (*all_frames
) == 0)
1450 else if (FRAMEP (*all_frames
))
1452 else if (!EQ (*all_frames
, Qt
))
1455 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1456 search just current frame, `visible' meaning search just visible
1457 frames, 0 meaning search visible and iconified frames, or a
1458 window, meaning search the frame that window belongs to, or a
1459 frame, meaning consider windows on that frame, only. */
1463 /* Return the next or previous window of WINDOW in canonical ordering
1464 of windows. NEXT_P non-zero means return the next window. See the
1465 documentation string of next-window for the meaning of MINIBUF and
1469 next_window (window
, minibuf
, all_frames
, next_p
)
1470 Lisp_Object window
, minibuf
, all_frames
;
1473 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1475 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1476 return the first window on the frame. */
1477 if (FRAMEP (all_frames
)
1478 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1479 return Fframe_first_window (all_frames
);
1485 /* Find WINDOW in the list of all windows. */
1486 list
= Fmemq (window
, window_list ());
1488 /* Scan forward from WINDOW to the end of the window list. */
1490 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1491 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1494 /* Scan from the start of the window list up to WINDOW. */
1496 for (list
= Vwindow_list
;
1497 CONSP (list
) && !EQ (XCAR (list
), window
);
1499 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1503 window
= XCAR (list
);
1507 Lisp_Object candidate
, list
;
1509 /* Scan through the list of windows for candidates. If there are
1510 candidate windows in front of WINDOW, the last one of these
1511 is the one we want. If there are candidates following WINDOW
1512 in the list, again the last one of these is the one we want. */
1514 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1516 if (EQ (XCAR (list
), window
))
1518 if (WINDOWP (candidate
))
1521 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1523 candidate
= XCAR (list
);
1526 if (WINDOWP (candidate
))
1534 /* This comment supplies the doc string for `next-window',
1535 for make-docfile to see. We cannot put this in the real DEFUN
1536 due to limits in the Unix cpp.
1538 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
1539 "Return next window after WINDOW in canonical ordering of windows.\n\
1540 If omitted, WINDOW defaults to the selected window.\n\
1542 Optional second arg MINIBUF t means count the minibuffer window even\n\
1543 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1544 it is active. MINIBUF neither t nor nil means not to count the\n\
1545 minibuffer even if it is active.\n\
1547 Several frames may share a single minibuffer; if the minibuffer\n\
1548 counts, all windows on all frames that share that minibuffer count\n\
1549 too. Therefore, `next-window' can be used to iterate through the\n\
1550 set of windows even when the minibuffer is on another frame. If the\n\
1551 minibuffer does not count, only windows from WINDOW's frame count.\n\
1553 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1554 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1555 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1556 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1557 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1558 Anything else means restrict to WINDOW's frame.\n\
1560 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1561 `next-window' to iterate through the entire cycle of acceptable\n\
1562 windows, eventually ending up back at the window you started with.\n\
1563 `previous-window' traverses the same cycle, in the reverse order.")
1564 (window, minibuf, all_frames) */
1566 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1568 (window
, minibuf
, all_frames
)
1569 Lisp_Object window
, minibuf
, all_frames
;
1571 return next_window (window
, minibuf
, all_frames
, 1);
1575 /* This comment supplies the doc string for `previous-window',
1576 for make-docfile to see. We cannot put this in the real DEFUN
1577 due to limits in the Unix cpp.
1579 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
1580 "Return the window preceding WINDOW in canonical ordering of windows.\n\
1581 If omitted, WINDOW defaults to the selected window.\n\
1583 Optional second arg MINIBUF t means count the minibuffer window even\n\
1584 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1585 it is active. MINIBUF neither t nor nil means not to count the\n\
1586 minibuffer even if it is active.\n\
1588 Several frames may share a single minibuffer; if the minibuffer\n\
1589 counts, all windows on all frames that share that minibuffer count\n\
1590 too. Therefore, `previous-window' can be used to iterate through\n\
1591 the set of windows even when the minibuffer is on another frame. If\n\
1592 the minibuffer does not count, only windows from WINDOW's frame count\n\
1594 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1595 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1596 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1597 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1598 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1599 Anything else means restrict to WINDOW's frame.\n\
1601 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1602 `previous-window' to iterate through the entire cycle of acceptable\n\
1603 windows, eventually ending up back at the window you started with.\n\
1604 `next-window' traverses the same cycle, in the reverse order.")
1605 (window, minibuf, all_frames) */
1608 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1610 (window
, minibuf
, all_frames
)
1611 Lisp_Object window
, minibuf
, all_frames
;
1613 return next_window (window
, minibuf
, all_frames
, 0);
1617 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1618 "Select the ARG'th different window on this frame.\n\
1619 All windows on current frame are arranged in a cyclic order.\n\
1620 This command selects the window ARG steps away in that order.\n\
1621 A negative ARG moves in the opposite order. If the optional second\n\
1622 argument ALL_FRAMES is non-nil, cycle through all frames.")
1624 Lisp_Object arg
, all_frames
;
1629 CHECK_NUMBER (arg
, 0);
1630 window
= selected_window
;
1632 for (i
= XINT (arg
); i
> 0; --i
)
1633 window
= Fnext_window (window
, Qnil
, all_frames
);
1635 window
= Fprevious_window (window
, Qnil
, all_frames
);
1637 Fselect_window (window
);
1642 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1643 "Return a list of windows on FRAME, starting with WINDOW.\n\
1644 FRAME nil or omitted means use the selected frame.\n\
1645 WINDOW nil or omitted means use the selected window.\n\
1646 MINIBUF t means include the minibuffer window, even if it isn't active.\n\
1647 MINIBUF nil or omitted means include the minibuffer window only\n\
1649 MINIBUF neither nil nor t means never include the minibuffer window.")
1650 (frame
, minibuf
, window
)
1651 Lisp_Object frame
, minibuf
, window
;
1655 window
= selected_window
;
1657 frame
= selected_frame
;
1659 if (!EQ (frame
, XWINDOW (window
)->frame
))
1660 error ("Window is on a different frame");
1662 return window_list_1 (window
, minibuf
, frame
);
1666 /* Return a list of windows in canonical ordering. Arguments are like
1667 for `next-window'. */
1670 window_list_1 (window
, minibuf
, all_frames
)
1671 Lisp_Object window
, minibuf
, all_frames
;
1673 Lisp_Object tail
, list
;
1675 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1678 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1679 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1680 list
= Fcons (XCAR (tail
), list
);
1682 return Fnreverse (list
);
1687 /* Look at all windows, performing an operation specified by TYPE
1689 If FRAMES is Qt, look at all frames;
1690 Qnil, look at just the selected frame;
1691 Qvisible, look at visible frames;
1692 a frame, just look at windows on that frame.
1693 If MINI is non-zero, perform the operation on minibuffer windows too.
1699 GET_BUFFER_WINDOW
, /* Arg is buffer */
1700 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1701 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1702 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1704 UNSHOW_BUFFER
, /* Arg is buffer */
1709 window_loop (type
, obj
, mini
, frames
)
1710 enum window_loop type
;
1711 Lisp_Object obj
, frames
;
1714 Lisp_Object window
, windows
, best_window
, frame_arg
;
1716 struct gcpro gcpro1
;
1718 /* If we're only looping through windows on a particular frame,
1719 frame points to that frame. If we're looping through windows
1720 on all frames, frame is 0. */
1721 if (FRAMEP (frames
))
1722 f
= XFRAME (frames
);
1723 else if (NILP (frames
))
1724 f
= SELECTED_FRAME ();
1729 frame_arg
= Qlambda
;
1730 else if (XFASTINT (frames
) == 0)
1732 else if (EQ (frames
, Qvisible
))
1737 /* frame_arg is Qlambda to stick to one frame,
1738 Qvisible to consider all visible frames,
1741 /* Pick a window to start with. */
1745 window
= FRAME_SELECTED_WINDOW (f
);
1747 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1749 /* Figure out the last window we're going to mess with. Since
1750 Fnext_window, given the same options, is guaranteed to go in a
1751 ring, we can just use Fprevious_window to find the last one.
1753 We can't just wait until we hit the first window again, because
1754 it might be deleted. */
1756 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1760 for (; CONSP (windows
); windows
= CDR (windows
))
1764 window
= XCAR (windows
);
1765 w
= XWINDOW (window
);
1767 /* Note that we do not pay attention here to whether the frame
1768 is visible, since Fwindow_list skips non-visible frames if
1769 that is desired, under the control of frame_arg. */
1770 if (!MINI_WINDOW_P (w
)
1771 /* For UNSHOW_BUFFER, we must always consider all windows. */
1772 || type
== UNSHOW_BUFFER
1773 || (mini
&& minibuf_level
> 0))
1776 case GET_BUFFER_WINDOW
:
1777 if (EQ (w
->buffer
, obj
)
1778 /* Don't find any minibuffer window
1779 except the one that is currently in use. */
1780 && (MINI_WINDOW_P (w
)
1781 ? EQ (window
, minibuf_window
)
1789 case GET_LRU_WINDOW
:
1790 /* t as arg means consider only full-width windows */
1791 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
1793 /* Ignore dedicated windows and minibuffers. */
1794 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1796 if (NILP (best_window
)
1797 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1798 > XFASTINT (w
->use_time
)))
1799 best_window
= window
;
1802 case DELETE_OTHER_WINDOWS
:
1803 if (!EQ (window
, obj
))
1804 Fdelete_window (window
);
1807 case DELETE_BUFFER_WINDOWS
:
1808 if (EQ (w
->buffer
, obj
))
1810 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
1812 /* If this window is dedicated, and in a frame of its own,
1814 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1815 && !NILP (w
->dedicated
)
1816 && other_visible_frames (f
))
1818 /* Skip the other windows on this frame.
1819 There might be one, the minibuffer! */
1820 while (CONSP (XCDR (windows
))
1821 && EQ (XWINDOW (XCAR (windows
))->frame
,
1822 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1823 windows
= XCDR (windows
);
1825 /* Now we can safely delete the frame. */
1826 Fdelete_frame (w
->frame
, Qnil
);
1828 else if (NILP (w
->parent
))
1830 /* If we're deleting the buffer displayed in the
1831 only window on the frame, find a new buffer to
1834 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1836 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1837 Fset_window_buffer (window
, buffer
);
1838 if (EQ (window
, selected_window
))
1839 Fset_buffer (w
->buffer
);
1842 Fdelete_window (window
);
1846 case GET_LARGEST_WINDOW
:
1848 /* Ignore dedicated windows and minibuffers. */
1849 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1852 if (NILP (best_window
))
1853 best_window
= window
;
1856 struct window
*b
= XWINDOW (best_window
);
1857 if (XFASTINT (w
->height
) * XFASTINT (w
->width
)
1858 > XFASTINT (b
->height
) * XFASTINT (b
->width
))
1859 best_window
= window
;
1865 if (EQ (w
->buffer
, obj
))
1868 struct frame
*f
= XFRAME (w
->frame
);
1870 /* Find another buffer to show in this window. */
1871 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1873 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1875 /* If this window is dedicated, and in a frame of its own,
1877 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1878 && !NILP (w
->dedicated
)
1879 && other_visible_frames (f
))
1881 /* Skip the other windows on this frame.
1882 There might be one, the minibuffer! */
1883 while (CONSP (XCDR (windows
))
1884 && EQ (XWINDOW (XCAR (windows
))->frame
,
1885 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1886 windows
= XCDR (windows
);
1888 /* Now we can safely delete the frame. */
1889 Fdelete_frame (w
->frame
, Qnil
);
1893 /* Otherwise show a different buffer in the window. */
1894 w
->dedicated
= Qnil
;
1895 Fset_window_buffer (window
, buffer
);
1896 if (EQ (window
, selected_window
))
1897 Fset_buffer (w
->buffer
);
1902 /* Check for a window that has a killed buffer. */
1903 case CHECK_ALL_WINDOWS
:
1904 if (! NILP (w
->buffer
)
1905 && NILP (XBUFFER (w
->buffer
)->name
))
1909 case WINDOW_LOOP_UNUSED
:
1918 /* Used for debugging. Abort if any window has a dead buffer. */
1921 check_all_windows ()
1923 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
1926 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1927 "Return the window least recently selected or used for display.\n\
1928 If optional argument FRAME is `visible', search all visible frames.\n\
1929 If FRAME is 0, search all visible and iconified frames.\n\
1930 If FRAME is t, search all frames.\n\
1931 If FRAME is nil, search only the selected frame.\n\
1932 If FRAME is a frame, search only that frame.")
1936 register Lisp_Object w
;
1937 /* First try for a window that is full-width */
1938 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1939 if (!NILP (w
) && !EQ (w
, selected_window
))
1941 /* If none of them, try the rest */
1942 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1945 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1946 "Return the largest window in area.\n\
1947 If optional argument FRAME is `visible', search all visible frames.\n\
1948 If FRAME is 0, search all visible and iconified frames.\n\
1949 If FRAME is t, search all frames.\n\
1950 If FRAME is nil, search only the selected frame.\n\
1951 If FRAME is a frame, search only that frame.")
1955 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1959 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1960 "Return a window currently displaying BUFFER, or nil if none.\n\
1961 If optional argument FRAME is `visible', search all visible frames.\n\
1962 If optional argument FRAME is 0, search all visible and iconified frames.\n\
1963 If FRAME is t, search all frames.\n\
1964 If FRAME is nil, search only the selected frame.\n\
1965 If FRAME is a frame, search only that frame.")
1967 Lisp_Object buffer
, frame
;
1969 buffer
= Fget_buffer (buffer
);
1970 if (BUFFERP (buffer
))
1971 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1976 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1978 "Make WINDOW (or the selected window) fill its frame.\n\
1979 Only the frame WINDOW is on is affected.\n\
1980 This function tries to reduce display jumps\n\
1981 by keeping the text previously visible in WINDOW\n\
1982 in the same place on the frame. Doing this depends on\n\
1983 the value of (window-start WINDOW), so if calling this function\n\
1984 in a program gives strange scrolling, make sure the window-start\n\
1985 value is reasonable when this function is called.")
1994 window
= selected_window
;
1996 CHECK_LIVE_WINDOW (window
, 0);
1998 w
= XWINDOW (window
);
2000 startpos
= marker_position (w
->start
);
2001 top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2003 if (MINI_WINDOW_P (w
) && top
> 0)
2004 error ("Can't expand minibuffer to full frame");
2006 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2008 /* Try to minimize scrolling, by setting the window start to the point
2009 will cause the text at the old window start to be at the same place
2010 on the frame. But don't try to do this if the window start is
2011 outside the visible portion (as might happen when the display is
2012 not current, due to typeahead). */
2013 if (startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2014 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2016 struct position pos
;
2017 struct buffer
*obuf
= current_buffer
;
2019 Fset_buffer (w
->buffer
);
2020 /* This computation used to temporarily move point, but that can
2021 have unwanted side effects due to text properties. */
2022 pos
= *vmotion (startpos
, -top
, w
);
2024 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2025 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2026 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2028 /* We need to do this, so that the window-scroll-functions
2030 w
->optional_new_start
= Qt
;
2032 set_buffer_internal (obuf
);
2038 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2039 1, 2, "bDelete windows on (buffer): ",
2040 "Delete all windows showing BUFFER.\n\
2041 Optional second argument FRAME controls which frames are affected.\n\
2042 If optional argument FRAME is `visible', search all visible frames.\n\
2043 If FRAME is 0, search all visible and iconified frames.\n\
2044 If FRAME is nil, search all frames.\n\
2045 If FRAME is t, search only the selected frame.\n\
2046 If FRAME is a frame, search only that frame.")
2048 Lisp_Object buffer
, frame
;
2050 /* FRAME uses t and nil to mean the opposite of what window_loop
2054 else if (EQ (frame
, Qt
))
2059 buffer
= Fget_buffer (buffer
);
2060 CHECK_BUFFER (buffer
, 0);
2061 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2067 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2068 Sreplace_buffer_in_windows
,
2069 1, 1, "bReplace buffer in windows: ",
2070 "Replace BUFFER with some other buffer in all windows showing it.")
2076 buffer
= Fget_buffer (buffer
);
2077 CHECK_BUFFER (buffer
, 0);
2078 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2083 /* Replace BUFFER with some other buffer in all windows
2084 of all frames, even those on other keyboards. */
2087 replace_buffer_in_all_windows (buffer
)
2091 Lisp_Object tail
, frame
;
2093 /* A single call to window_loop won't do the job
2094 because it only considers frames on the current keyboard.
2095 So loop manually over frames, and handle each one. */
2096 FOR_EACH_FRAME (tail
, frame
)
2097 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2099 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2103 /* Set the height of WINDOW and all its inferiors. */
2105 /* The smallest acceptable dimensions for a window. Anything smaller
2106 might crash Emacs. */
2108 #define MIN_SAFE_WINDOW_WIDTH (2)
2109 #define MIN_SAFE_WINDOW_HEIGHT (2)
2111 /* Make sure that window_min_height and window_min_width are
2112 not too small; if they are, set them to safe minima. */
2115 check_min_window_sizes ()
2117 /* Smaller values might permit a crash. */
2118 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2119 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2120 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2121 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2124 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2125 minimum allowable size. */
2128 check_frame_size (frame
, rows
, cols
)
2132 /* For height, we have to see:
2133 whether the frame has a minibuffer,
2134 whether it wants a mode line, and
2135 whether it has a menu bar. */
2137 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
2138 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
2139 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
2141 if (FRAME_TOP_MARGIN (frame
) > 0)
2142 min_height
+= FRAME_TOP_MARGIN (frame
);
2144 if (*rows
< min_height
)
2146 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2147 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2151 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2152 check if W's width can be changed, otherwise check W's height.
2153 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2154 siblings, too. If none of the siblings is resizable, WINDOW isn't
2158 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2160 int width_p
, check_siblings_p
;
2165 if (!NILP (w
->hchild
))
2167 c
= XWINDOW (w
->hchild
);
2171 /* A horiz. combination is fixed-width if all of if its
2173 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2174 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2175 fixed_p
= c
== NULL
;
2179 /* A horiz. combination is fixed-height if one of if its
2181 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2182 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2183 fixed_p
= c
!= NULL
;
2186 else if (!NILP (w
->vchild
))
2188 c
= XWINDOW (w
->vchild
);
2192 /* A vert. combination is fixed-width if one of if its
2194 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2195 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2196 fixed_p
= c
!= NULL
;
2200 /* A vert. combination is fixed-height if all of if its
2202 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2203 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2204 fixed_p
= c
== NULL
;
2207 else if (BUFFERP (w
->buffer
))
2209 if (w
->height_fixed_p
&& !width_p
)
2213 struct buffer
*old
= current_buffer
;
2216 current_buffer
= XBUFFER (w
->buffer
);
2217 val
= find_symbol_value (Qwindow_size_fixed
);
2218 current_buffer
= old
;
2221 if (!EQ (val
, Qunbound
))
2223 fixed_p
= !NILP (val
);
2226 && ((EQ (val
, Qheight
) && width_p
)
2227 || (EQ (val
, Qwidth
) && !width_p
)))
2232 /* Can't tell if this one is resizable without looking at
2233 siblings. If all siblings are fixed-size this one is too. */
2234 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2238 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2239 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2243 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2244 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2258 /* Return the minimum size of window W, not taking fixed-width windows
2259 into account. WIDTH_P non-zero means return the minimum width,
2260 otherwise return the minimum height. If W is a combination window,
2261 compute the minimum size from the minimum sizes of W's children. */
2264 window_min_size_1 (w
, width_p
)
2271 if (!NILP (w
->hchild
))
2273 c
= XWINDOW (w
->hchild
);
2278 /* The min width of a horizontal combination is
2279 the sum of the min widths of its children. */
2282 size
+= window_min_size_1 (c
, width_p
);
2283 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2288 /* The min height a horizontal combination equals
2289 the maximum of all min height of its children. */
2292 int min_size
= window_min_size_1 (c
, width_p
);
2293 size
= max (min_size
, size
);
2294 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2298 else if (!NILP (w
->vchild
))
2300 c
= XWINDOW (w
->vchild
);
2305 /* The min width of a vertical combination is
2306 the maximum of the min widths of its children. */
2309 int min_size
= window_min_size_1 (c
, width_p
);
2310 size
= max (min_size
, size
);
2311 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2316 /* The min height of a vertical combination equals
2317 the sum of the min height of its children. */
2320 size
+= window_min_size_1 (c
, width_p
);
2321 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2328 size
= window_min_width
;
2331 if (MINI_WINDOW_P (w
)
2332 || (!WINDOW_WANTS_MODELINE_P (w
)
2333 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2336 size
= window_min_height
;
2344 /* Return the minimum size of window W, taking fixed-size windows into
2345 account. WIDTH_P non-zero means return the minimum width,
2346 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2347 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2348 unless FIXED is null. */
2351 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2353 int width_p
, ignore_fixed_p
, *fixed
;
2360 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2366 size
= width_p
? XFASTINT (w
->width
) : XFASTINT (w
->height
);
2368 size
= window_min_size_1 (w
, width_p
);
2374 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2375 WINDOW's width. Resize WINDOW's children, if any, so that they
2376 keep their proportionate size relative to WINDOW. Propagate
2377 WINDOW's top or left edge position to children. Delete windows
2378 that become too small unless NODELETE_P is non-zero. */
2381 size_window (window
, size
, width_p
, nodelete_p
)
2383 int size
, width_p
, nodelete_p
;
2385 struct window
*w
= XWINDOW (window
);
2387 Lisp_Object child
, *forward
, *sideward
;
2388 int old_size
, min_size
;
2390 check_min_window_sizes ();
2391 size
= max (0, size
);
2393 /* If the window has been "too small" at one point,
2394 don't delete it for being "too small" in the future.
2395 Preserve it as long as that is at all possible. */
2398 old_size
= XINT (w
->width
);
2399 min_size
= window_min_width
;
2403 old_size
= XINT (w
->height
);
2404 min_size
= window_min_height
;
2407 if (old_size
< min_size
)
2408 w
->too_small_ok
= Qt
;
2410 /* Maybe delete WINDOW if it's too small. */
2411 if (!nodelete_p
&& !NILP (w
->parent
))
2413 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2414 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2416 min_size
= width_p
? window_min_width
: window_min_height
;
2418 if (size
< min_size
)
2420 delete_window (window
);
2425 /* Set redisplay hints. */
2426 w
->last_modified
= make_number (0);
2427 w
->last_overlay_modified
= make_number (0);
2428 windows_or_buffers_changed
++;
2429 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2433 sideward
= &w
->vchild
;
2434 forward
= &w
->hchild
;
2435 w
->width
= make_number (size
);
2439 sideward
= &w
->hchild
;
2440 forward
= &w
->vchild
;
2441 w
->height
= make_number (size
);
2444 if (!NILP (*sideward
))
2446 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2448 c
= XWINDOW (child
);
2453 size_window (child
, size
, width_p
, nodelete_p
);
2456 else if (!NILP (*forward
))
2458 int fixed_size
, each
, extra
, n
;
2459 int resize_fixed_p
, nfixed
;
2460 int last_pos
, first_pos
, nchildren
, total
;
2462 /* Determine the fixed-size portion of the this window, and the
2463 number of child windows. */
2464 fixed_size
= nchildren
= nfixed
= total
= 0;
2465 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2469 c
= XWINDOW (child
);
2470 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2471 total
+= child_size
;
2473 if (window_fixed_size_p (c
, width_p
, 0))
2475 fixed_size
+= child_size
;
2480 /* If the new size is smaller than fixed_size, or if there
2481 aren't any resizable windows, allow resizing fixed-size
2483 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2485 /* Compute how many lines/columns to add to each child. The
2486 value of extra takes care of rounding errors. */
2487 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2488 each
= (size
- total
) / n
;
2489 extra
= (size
- total
) - n
* each
;
2491 /* Compute new children heights and edge positions. */
2492 first_pos
= width_p
? XINT (w
->left
) : XINT (w
->top
);
2493 last_pos
= first_pos
;
2494 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2496 int new_size
, old_size
;
2498 c
= XWINDOW (child
);
2499 old_size
= width_p
? XFASTINT (c
->width
) : XFASTINT (c
->height
);
2500 new_size
= old_size
;
2502 /* The top or left edge position of this child equals the
2503 bottom or right edge of its predecessor. */
2505 c
->left
= make_number (last_pos
);
2507 c
->top
= make_number (last_pos
);
2509 /* If this child can be resized, do it. */
2510 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2512 new_size
= old_size
+ each
+ extra
;
2516 /* Set new height. Note that size_window also propagates
2517 edge positions to children, so it's not a no-op if we
2518 didn't change the child's size. */
2519 size_window (child
, new_size
, width_p
, 1);
2521 /* Remember the bottom/right edge position of this child; it
2522 will be used to set the top/left edge of the next child. */
2523 last_pos
+= new_size
;
2526 /* We should have covered the parent exactly with child windows. */
2527 xassert (size
== last_pos
- first_pos
);
2529 /* Now delete any children that became too small. */
2531 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2534 c
= XWINDOW (child
);
2535 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2536 size_window (child
, child_size
, width_p
, 0);
2541 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2542 WINDOW's children. NODELETE non-zero means don't delete windows
2543 that become too small in the process. (The caller should check
2544 later and do so if appropriate.) */
2547 set_window_height (window
, height
, nodelete
)
2552 size_window (window
, height
, 0, nodelete
);
2556 /* Set WINDOW's width to WIDTH, and recursively change the width of
2557 WINDOW's children. NODELETE non-zero means don't delete windows
2558 that become too small in the process. (The caller should check
2559 later and do so if appropriate.) */
2562 set_window_width (window
, width
, nodelete
)
2567 size_window (window
, width
, 1, nodelete
);
2571 int window_select_count
;
2574 Fset_window_buffer_unwind (obuf
)
2582 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
2583 means it's allowed to run hooks. See make_frame for a case where
2584 it's not allowed. */
2587 set_window_buffer (window
, buffer
, run_hooks_p
)
2588 Lisp_Object window
, buffer
;
2591 struct window
*w
= XWINDOW (window
);
2592 struct buffer
*b
= XBUFFER (buffer
);
2593 int count
= specpdl_ptr
- specpdl
;
2597 if (EQ (window
, selected_window
))
2598 b
->last_selected_window
= window
;
2600 /* Update time stamps of buffer display. */
2601 if (INTEGERP (b
->display_count
))
2602 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
2603 b
->display_time
= Fcurrent_time ();
2605 XSETFASTINT (w
->window_end_pos
, 0);
2606 XSETFASTINT (w
->window_end_vpos
, 0);
2607 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
2608 w
->window_end_valid
= Qnil
;
2609 XSETFASTINT (w
->hscroll
, 0);
2610 XSETFASTINT (w
->min_hscroll
, 0);
2611 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
2612 set_marker_restricted (w
->start
,
2613 make_number (b
->last_window_start
),
2615 w
->start_at_line_beg
= Qnil
;
2616 w
->force_start
= Qnil
;
2617 XSETFASTINT (w
->last_modified
, 0);
2618 XSETFASTINT (w
->last_overlay_modified
, 0);
2619 windows_or_buffers_changed
++;
2621 /* We must select BUFFER for running the window-scroll-functions.
2622 If WINDOW is selected, switch permanently.
2623 Otherwise, switch but go back to the ambient buffer afterward. */
2624 if (EQ (window
, selected_window
))
2625 Fset_buffer (buffer
);
2626 /* We can't check ! NILP (Vwindow_scroll_functions) here
2627 because that might itself be a local variable. */
2628 else if (window_initialized
)
2630 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
2631 Fset_buffer (buffer
);
2634 /* Set left and right marginal area width from buffer. */
2635 Fset_window_margins (window
, b
->left_margin_width
, b
->right_margin_width
);
2639 if (! NILP (Vwindow_scroll_functions
))
2640 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2641 Fmarker_position (w
->start
));
2643 if (! NILP (Vwindow_configuration_change_hook
)
2644 && ! NILP (Vrun_hooks
))
2645 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2648 unbind_to (count
, Qnil
);
2652 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
2653 "Make WINDOW display BUFFER as its contents.\n\
2654 BUFFER can be a buffer or buffer name.")
2656 register Lisp_Object window
, buffer
;
2658 register Lisp_Object tem
;
2659 register struct window
*w
= decode_window (window
);
2661 XSETWINDOW (window
, w
);
2662 buffer
= Fget_buffer (buffer
);
2663 CHECK_BUFFER (buffer
, 1);
2665 if (NILP (XBUFFER (buffer
)->name
))
2666 error ("Attempt to display deleted buffer");
2670 error ("Window is deleted");
2671 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
2672 is first being set up. */
2674 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
2675 error ("Window is dedicated to `%s'",
2676 XSTRING (XBUFFER (tem
)->name
)->data
);
2681 set_window_buffer (window
, buffer
, 1);
2685 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
2686 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
2687 If WINDOW is not already selected, also make WINDOW's buffer current.\n\
2688 Note that the main editor command loop\n\
2689 selects the buffer of the selected window before each command.")
2691 register Lisp_Object window
;
2693 return select_window_1 (window
, 1);
2696 /* Note that selected_window can be nil
2697 when this is called from Fset_window_configuration. */
2700 select_window_1 (window
, recordflag
)
2701 register Lisp_Object window
;
2704 register struct window
*w
;
2705 register struct window
*ow
;
2708 CHECK_LIVE_WINDOW (window
, 0);
2710 w
= XWINDOW (window
);
2712 if (NILP (w
->buffer
))
2713 error ("Trying to select deleted window or non-leaf window");
2715 XSETFASTINT (w
->use_time
, ++window_select_count
);
2716 if (EQ (window
, selected_window
))
2719 if (!NILP (selected_window
))
2721 ow
= XWINDOW (selected_window
);
2722 if (! NILP (ow
->buffer
))
2723 set_marker_both (ow
->pointm
, ow
->buffer
,
2724 BUF_PT (XBUFFER (ow
->buffer
)),
2725 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
2728 selected_window
= window
;
2729 sf
= SELECTED_FRAME ();
2730 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
2732 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
2733 /* Use this rather than Fhandle_switch_frame
2734 so that FRAME_FOCUS_FRAME is moved appropriately as we
2735 move around in the state where a minibuffer in a separate
2737 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
2740 sf
->selected_window
= window
;
2743 record_buffer (w
->buffer
);
2744 Fset_buffer (w
->buffer
);
2746 XBUFFER (w
->buffer
)->last_selected_window
= window
;
2748 /* Go to the point recorded in the window.
2749 This is important when the buffer is in more
2750 than one window. It also matters when
2751 redisplay_window has altered point after scrolling,
2752 because it makes the change only in the window. */
2754 register int new_point
= marker_position (w
->pointm
);
2755 if (new_point
< BEGV
)
2757 else if (new_point
> ZV
)
2763 windows_or_buffers_changed
++;
2767 /* Deiconify the frame containing the window WINDOW,
2768 unless it is the selected frame;
2771 The reason for the exception for the selected frame
2772 is that it seems better not to change the selected frames visibility
2773 merely because of displaying a different buffer in it.
2774 The deiconification is useful when a buffer gets shown in
2775 another frame that you were not using lately. */
2778 display_buffer_1 (window
)
2781 Lisp_Object frame
= XWINDOW (window
)->frame
;
2782 FRAME_PTR f
= XFRAME (frame
);
2784 FRAME_SAMPLE_VISIBILITY (f
);
2786 if (!EQ (frame
, selected_frame
))
2788 if (FRAME_ICONIFIED_P (f
))
2789 Fmake_frame_visible (frame
);
2790 else if (FRAME_VISIBLE_P (f
))
2791 Fraise_frame (frame
);
2797 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2798 "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\
2799 The value is actually t if the frame should be called with default frame\n\
2800 parameters, and a list of frame parameters if they were specified.\n\
2801 See `special-display-buffer-names', and `special-display-regexps'.")
2803 Lisp_Object buffer_name
;
2807 CHECK_STRING (buffer_name
, 1);
2809 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2813 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2817 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2819 Lisp_Object car
= XCAR (tem
);
2821 && fast_string_match (car
, buffer_name
) >= 0)
2823 else if (CONSP (car
)
2824 && STRINGP (XCAR (car
))
2825 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2831 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2832 "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\
2833 See `same-window-buffer-names' and `same-window-regexps'.")
2835 Lisp_Object buffer_name
;
2839 CHECK_STRING (buffer_name
, 1);
2841 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2845 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2849 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2851 Lisp_Object car
= XCAR (tem
);
2853 && fast_string_match (car
, buffer_name
) >= 0)
2855 else if (CONSP (car
)
2856 && STRINGP (XCAR (car
))
2857 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2863 /* Use B so the default is (other-buffer). */
2864 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
2865 "BDisplay buffer: \nP",
2866 "Make BUFFER appear in some window but don't select it.\n\
2867 BUFFER can be a buffer or a buffer name.\n\
2868 If BUFFER is shown already in some window, just use that one,\n\
2869 unless the window is the selected window and the optional second\n\
2870 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
2871 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
2872 Returns the window displaying BUFFER.\n\
2873 If `display-reuse-frames' is non-nil, and another frame is currently\n\
2874 displaying BUFFER, then simply raise that frame.\n\
2876 The variables `special-display-buffer-names', `special-display-regexps',\n\
2877 `same-window-buffer-names', and `same-window-regexps' customize how certain\n\
2878 buffer names are handled.\n\
2880 If optional argument FRAME is `visible', search all visible frames.\n\
2881 If FRAME is 0, search all visible and iconified frames.\n\
2882 If FRAME is t, search all frames.\n\
2883 If FRAME is a frame, search only that frame.\n\
2884 If FRAME is nil, search only the selected frame\n\
2885 (actually the last nonminibuffer frame),\n\
2886 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,\n\
2887 which means search visible and iconified frames.\n\
2889 If `even-window-heights' is non-nil, window heights will be evened out\n\
2890 if displaying the buffer causes two vertically adjacent windows to be\n\
2892 (buffer
, not_this_window
, frame
)
2893 register Lisp_Object buffer
, not_this_window
, frame
;
2895 register Lisp_Object window
, tem
, swp
;
2899 buffer
= Fget_buffer (buffer
);
2900 CHECK_BUFFER (buffer
, 0);
2902 if (!NILP (Vdisplay_buffer_function
))
2903 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2905 if (NILP (not_this_window
)
2906 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2907 return display_buffer_1 (selected_window
);
2909 /* See if the user has specified this buffer should appear
2910 in the selected window. */
2911 if (NILP (not_this_window
))
2913 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
2914 if (!NILP (swp
) && !no_switch_window (selected_window
))
2916 Fswitch_to_buffer (buffer
, Qnil
);
2917 return display_buffer_1 (selected_window
);
2921 /* If the user wants pop-up-frames or display-reuse-frames, then
2922 look for a window showing BUFFER on any visible or iconified frame.
2923 Otherwise search only the current frame. */
2926 else if (pop_up_frames
2927 || display_buffer_reuse_frames
2928 || last_nonminibuf_frame
== 0)
2929 XSETFASTINT (tem
, 0);
2931 XSETFRAME (tem
, last_nonminibuf_frame
);
2933 window
= Fget_buffer_window (buffer
, tem
);
2935 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2936 return display_buffer_1 (window
);
2938 /* Certain buffer names get special handling. */
2939 if (!NILP (Vspecial_display_function
) && NILP (swp
))
2941 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2943 return call1 (Vspecial_display_function
, buffer
);
2945 return call2 (Vspecial_display_function
, buffer
, tem
);
2948 /* If there are no frames open that have more than a minibuffer,
2949 we need to create a new frame. */
2950 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2952 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2953 Fset_window_buffer (window
, buffer
);
2954 return display_buffer_1 (window
);
2957 f
= SELECTED_FRAME ();
2959 || FRAME_MINIBUF_ONLY_P (f
)
2960 /* If the current frame is a special display frame,
2961 don't try to reuse its windows. */
2962 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
2967 if (FRAME_MINIBUF_ONLY_P (f
))
2968 XSETFRAME (frames
, last_nonminibuf_frame
);
2969 /* Don't try to create a window if would get an error */
2970 if (split_height_threshold
< window_min_height
<< 1)
2971 split_height_threshold
= window_min_height
<< 1;
2973 /* Note that both Fget_largest_window and Fget_lru_window
2974 ignore minibuffers and dedicated windows.
2975 This means they can return nil. */
2977 /* If the frame we would try to split cannot be split,
2978 try other frames. */
2979 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
2981 /* Try visible frames first. */
2982 window
= Fget_largest_window (Qvisible
);
2983 /* If that didn't work, try iconified frames. */
2985 window
= Fget_largest_window (make_number (0));
2987 window
= Fget_largest_window (Qt
);
2990 window
= Fget_largest_window (frames
);
2992 /* If we got a tall enough full-width window that can be split,
2995 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2996 && window_height (window
) >= split_height_threshold
2997 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
2998 window
= Fsplit_window (window
, Qnil
, Qnil
);
3001 Lisp_Object upper
, lower
, other
;
3003 window
= Fget_lru_window (frames
);
3004 /* If the LRU window is selected, and big enough,
3005 and can be split, split it. */
3007 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3008 && (EQ (window
, selected_window
)
3009 || EQ (XWINDOW (window
)->parent
, Qnil
))
3010 && window_height (window
) >= window_min_height
<< 1)
3011 window
= Fsplit_window (window
, Qnil
, Qnil
);
3012 /* If Fget_lru_window returned nil, try other approaches. */
3014 /* Try visible frames first. */
3016 window
= Fget_buffer_window (buffer
, Qvisible
);
3018 window
= Fget_largest_window (Qvisible
);
3019 /* If that didn't work, try iconified frames. */
3021 window
= Fget_buffer_window (buffer
, make_number (0));
3023 window
= Fget_largest_window (make_number (0));
3024 /* Try invisible frames. */
3026 window
= Fget_buffer_window (buffer
, Qt
);
3028 window
= Fget_largest_window (Qt
);
3029 /* As a last resort, make a new frame. */
3031 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3032 /* If window appears above or below another,
3033 even out their heights. */
3034 other
= upper
= lower
= Qnil
;
3035 if (!NILP (XWINDOW (window
)->prev
))
3036 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3037 if (!NILP (XWINDOW (window
)->next
))
3038 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3040 && !NILP (Veven_window_heights
)
3041 /* Check that OTHER and WINDOW are vertically arrayed. */
3042 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
3043 && (XFASTINT (XWINDOW (other
)->height
)
3044 > XFASTINT (XWINDOW (window
)->height
)))
3046 int total
= (XFASTINT (XWINDOW (other
)->height
)
3047 + XFASTINT (XWINDOW (window
)->height
));
3048 enlarge_window (upper
,
3049 total
/ 2 - XFASTINT (XWINDOW (upper
)->height
),
3055 window
= Fget_lru_window (Qnil
);
3057 Fset_window_buffer (window
, buffer
);
3058 return display_buffer_1 (window
);
3062 temp_output_buffer_show (buf
)
3063 register Lisp_Object buf
;
3065 register struct buffer
*old
= current_buffer
;
3066 register Lisp_Object window
;
3067 register struct window
*w
;
3069 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3072 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3076 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3077 set_buffer_internal (old
);
3079 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3080 call1 (Vtemp_buffer_show_function
, buf
);
3083 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3085 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3086 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3087 Vminibuf_scroll_window
= window
;
3088 w
= XWINDOW (window
);
3089 XSETFASTINT (w
->hscroll
, 0);
3090 XSETFASTINT (w
->min_hscroll
, 0);
3091 set_marker_restricted_both (w
->start
, buf
, 1, 1);
3092 set_marker_restricted_both (w
->pointm
, buf
, 1, 1);
3094 /* Run temp-buffer-show-hook, with the chosen window selected
3095 and it sbuffer current. */
3096 if (!NILP (Vrun_hooks
))
3099 tem
= Fboundp (Qtemp_buffer_show_hook
);
3102 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
3105 int count
= specpdl_ptr
- specpdl
;
3106 Lisp_Object prev_window
;
3107 prev_window
= selected_window
;
3109 /* Select the window that was chosen, for running the hook. */
3110 record_unwind_protect (Fselect_window
, prev_window
);
3111 select_window_1 (window
, 0);
3112 Fset_buffer (w
->buffer
);
3113 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3114 select_window_1 (prev_window
, 0);
3115 unbind_to (count
, Qnil
);
3123 make_dummy_parent (window
)
3127 register struct window
*o
, *p
;
3128 register struct Lisp_Vector
*vec
;
3131 o
= XWINDOW (window
);
3132 vec
= allocate_vectorlike ((EMACS_INT
)VECSIZE (struct window
));
3133 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3134 vec
->contents
[i
] = ((struct Lisp_Vector
*)o
)->contents
[i
];
3135 vec
->size
= VECSIZE (struct window
);
3136 p
= (struct window
*)vec
;
3137 XSETWINDOW (new, p
);
3139 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
3141 /* Put new into window structure in place of window */
3142 replace_window (window
, new);
3155 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3156 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
3157 WINDOW defaults to selected one and SIZE to half its size.\n\
3158 If optional third arg HORFLAG is non-nil, split side by side\n\
3159 and put SIZE columns in the first of the pair. In that case,\n\
3160 SIZE includes that window's scroll bar, or the divider column to its right.")
3161 (window
, size
, horflag
)
3162 Lisp_Object window
, size
, horflag
;
3164 register Lisp_Object
new;
3165 register struct window
*o
, *p
;
3167 register int size_int
;
3170 window
= selected_window
;
3172 CHECK_LIVE_WINDOW (window
, 0);
3174 o
= XWINDOW (window
);
3175 fo
= XFRAME (WINDOW_FRAME (o
));
3179 if (!NILP (horflag
))
3180 /* Calculate the size of the left-hand window, by dividing
3181 the usable space in columns by two.
3182 We round up, since the left-hand window may include
3183 a dividing line, while the right-hand may not. */
3184 size_int
= (XFASTINT (o
->width
) + 1) >> 1;
3186 size_int
= XFASTINT (o
->height
) >> 1;
3190 CHECK_NUMBER (size
, 1);
3191 size_int
= XINT (size
);
3194 if (MINI_WINDOW_P (o
))
3195 error ("Attempt to split minibuffer window");
3196 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3197 error ("Attempt to split fixed-size window");
3199 check_min_window_sizes ();
3203 if (size_int
< window_min_height
)
3204 error ("Window height %d too small (after splitting)", size_int
);
3205 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
3206 error ("Window height %d too small (after splitting)",
3207 XFASTINT (o
->height
) - size_int
);
3208 if (NILP (o
->parent
)
3209 || NILP (XWINDOW (o
->parent
)->vchild
))
3211 make_dummy_parent (window
);
3213 XWINDOW (new)->vchild
= window
;
3218 if (size_int
< window_min_width
)
3219 error ("Window width %d too small (after splitting)", size_int
);
3221 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
3222 error ("Window width %d too small (after splitting)",
3223 XFASTINT (o
->width
) - size_int
);
3224 if (NILP (o
->parent
)
3225 || NILP (XWINDOW (o
->parent
)->hchild
))
3227 make_dummy_parent (window
);
3229 XWINDOW (new)->hchild
= window
;
3233 /* Now we know that window's parent is a vertical combination
3234 if we are dividing vertically, or a horizontal combination
3235 if we are making side-by-side windows */
3237 windows_or_buffers_changed
++;
3238 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3239 new = make_window ();
3242 p
->frame
= o
->frame
;
3244 if (!NILP (p
->next
))
3245 XWINDOW (p
->next
)->prev
= new;
3248 p
->parent
= o
->parent
;
3250 p
->window_end_valid
= Qnil
;
3251 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3253 /* Apportion the available frame space among the two new windows */
3255 if (!NILP (horflag
))
3257 p
->height
= o
->height
;
3259 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
3260 XSETFASTINT (o
->width
, size_int
);
3261 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
3266 p
->width
= o
->width
;
3267 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
3268 XSETFASTINT (o
->height
, size_int
);
3269 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
3272 /* Adjust glyph matrices. */
3274 Fset_window_buffer (new, o
->buffer
);
3278 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
3279 "Make current window ARG lines bigger.\n\
3280 From program, optional second arg non-nil means grow sideways ARG columns.")
3282 register Lisp_Object arg
, side
;
3284 CHECK_NUMBER (arg
, 0);
3285 enlarge_window (selected_window
, XINT (arg
), !NILP (side
));
3287 if (! NILP (Vwindow_configuration_change_hook
))
3288 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3293 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
3294 "Make current window ARG lines smaller.\n\
3295 From program, optional second arg non-nil means shrink sideways arg columns.")
3297 register Lisp_Object arg
, side
;
3299 CHECK_NUMBER (arg
, 0);
3300 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
3302 if (! NILP (Vwindow_configuration_change_hook
))
3303 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3309 window_height (window
)
3312 register struct window
*p
= XWINDOW (window
);
3313 return XFASTINT (p
->height
);
3317 window_width (window
)
3320 register struct window
*p
= XWINDOW (window
);
3321 return XFASTINT (p
->width
);
3326 *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top))
3328 #define CURSIZE(w) \
3329 *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height))
3332 /* Enlarge selected_window by DELTA. WIDTHFLAG non-zero means
3333 increase its width. Siblings of the selected window are resized to
3334 fullfil the size request. If they become too small in the process,
3335 they will be deleted. */
3338 enlarge_window (window
, delta
, widthflag
)
3340 int delta
, widthflag
;
3342 Lisp_Object parent
, next
, prev
;
3346 int (*sizefun
) P_ ((Lisp_Object
))
3347 = widthflag
? window_width
: window_height
;
3348 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3349 = (widthflag
? set_window_width
: set_window_height
);
3351 /* Check values of window_min_width and window_min_height for
3353 check_min_window_sizes ();
3355 /* Give up if this window cannot be resized. */
3356 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3357 error ("Window is not resizable");
3359 /* Find the parent of the selected window. */
3362 p
= XWINDOW (window
);
3368 error ("No other window to side of this one");
3373 ? !NILP (XWINDOW (parent
)->hchild
)
3374 : !NILP (XWINDOW (parent
)->vchild
))
3380 sizep
= &CURSIZE (window
);
3383 register int maxdelta
;
3385 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
3386 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
3387 - window_min_size (XWINDOW (p
->next
),
3389 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
3390 - window_min_size (XWINDOW (p
->prev
),
3392 /* This is a frame with only one window, a minibuffer-only
3393 or a minibufferless frame. */
3396 if (delta
> maxdelta
)
3397 /* This case traps trying to make the minibuffer
3398 the full frame, or make the only window aside from the
3399 minibuffer the full frame. */
3403 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
3405 delete_window (window
);
3412 /* Find the total we can get from other siblings. */
3414 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
3415 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
3417 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
3418 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
3421 /* If we can get it all from them, do so. */
3422 if (delta
<= maximum
)
3424 Lisp_Object first_unaffected
;
3425 Lisp_Object first_affected
;
3430 first_affected
= window
;
3431 /* Look at one sibling at a time,
3432 moving away from this window in both directions alternately,
3433 and take as much as we can get without deleting that sibling. */
3434 while (delta
!= 0 && (!NILP (next
) || !NILP (prev
)))
3438 int this_one
= ((*sizefun
) (next
)
3439 - window_min_size (XWINDOW (next
),
3440 widthflag
, 0, &fixed_p
));
3443 if (this_one
> delta
)
3446 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
3447 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3452 next
= XWINDOW (next
)->next
;
3460 int this_one
= ((*sizefun
) (prev
)
3461 - window_min_size (XWINDOW (prev
),
3462 widthflag
, 0, &fixed_p
));
3465 if (this_one
> delta
)
3468 first_affected
= prev
;
3470 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
3471 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3476 prev
= XWINDOW (prev
)->prev
;
3480 xassert (delta
== 0);
3482 /* Now recalculate the edge positions of all the windows affected,
3483 based on the new sizes. */
3484 first_unaffected
= next
;
3485 prev
= first_affected
;
3486 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
3487 prev
= next
, next
= XWINDOW (next
)->next
)
3489 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
3490 /* This does not change size of NEXT,
3491 but it propagates the new top edge to its children */
3492 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
3497 register int delta1
;
3498 register int opht
= (*sizefun
) (parent
);
3500 /* If trying to grow this window to or beyond size of the parent,
3501 make delta1 so big that, on shrinking back down,
3502 all the siblings end up with less than one line and are deleted. */
3503 if (opht
<= XINT (*sizep
) + delta
)
3504 delta1
= opht
* opht
* 2;
3507 /* Otherwise, make delta1 just right so that if we add
3508 delta1 lines to this window and to the parent, and then
3509 shrink the parent back to its original size, the new
3510 proportional size of this window will increase by delta.
3512 The function size_window will compute the new height h'
3513 of the window from delta1 as:
3516 x = delta1 - delta1/n * n for the 1st resizable child
3519 where n is the number of children that can be resized.
3520 We can ignore x by choosing a delta1 that is a multiple of
3521 n. We want the height of this window to come out as
3531 The number of children n rquals the number of resizable
3532 children of this window + 1 because we know window itself
3533 is resizable (otherwise we would have signalled an error. */
3535 struct window
*w
= XWINDOW (window
);
3539 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
3540 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3542 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
3543 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3549 /* Add delta1 lines or columns to this window, and to the parent,
3550 keeping things consistent while not affecting siblings. */
3551 XSETINT (CURSIZE (parent
), opht
+ delta1
);
3552 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
3554 /* Squeeze out delta1 lines or columns from our parent,
3555 shriking this window and siblings proportionately.
3556 This brings parent back to correct size.
3557 Delta1 was calculated so this makes this window the desired size,
3558 taking it all out of the siblings. */
3559 (*setsizefun
) (parent
, opht
, 0);
3562 XSETFASTINT (p
->last_modified
, 0);
3563 XSETFASTINT (p
->last_overlay_modified
, 0);
3565 /* Adjust glyph matrices. */
3566 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
3574 /***********************************************************************
3575 Resizing Mini-Windows
3576 ***********************************************************************/
3578 static void shrink_window_lowest_first
P_ ((struct window
*, int));
3580 enum save_restore_action
3587 static int save_restore_orig_size
P_ ((struct window
*,
3588 enum save_restore_action
));
3590 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
3591 from lowest windows first. */
3594 shrink_window_lowest_first (w
, height
)
3602 xassert (!MINI_WINDOW_P (w
));
3604 /* Set redisplay hints. */
3605 XSETFASTINT (w
->last_modified
, 0);
3606 XSETFASTINT (w
->last_overlay_modified
, 0);
3607 windows_or_buffers_changed
++;
3608 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
3610 old_height
= XFASTINT (w
->height
);
3611 XSETFASTINT (w
->height
, height
);
3613 if (!NILP (w
->hchild
))
3615 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
3617 c
= XWINDOW (child
);
3619 shrink_window_lowest_first (c
, height
);
3622 else if (!NILP (w
->vchild
))
3624 Lisp_Object last_child
;
3625 int delta
= old_height
- height
;
3630 /* Find the last child. We are taking space from lowest windows
3631 first, so we iterate over children from the last child
3633 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
3636 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
3637 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
3641 c
= XWINDOW (child
);
3642 this_one
= XFASTINT (c
->height
) - MIN_SAFE_WINDOW_HEIGHT
;
3644 if (this_one
> delta
)
3647 shrink_window_lowest_first (c
, XFASTINT (c
->height
) - this_one
);
3651 /* Compute new positions. */
3652 last_top
= XINT (w
->top
);
3653 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
3655 c
= XWINDOW (child
);
3656 c
->top
= make_number (last_top
);
3657 shrink_window_lowest_first (c
, XFASTINT (c
->height
));
3658 last_top
+= XFASTINT (c
->height
);
3664 /* Save, restore, or check positions and sizes in the window tree
3665 rooted at W. ACTION says what to do.
3667 If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height
3668 members are valid for all windows in the window tree. Value is
3669 non-zero if they are valid.
3671 If ACTION is SAVE_ORIG_SIZES, save members top and height in
3672 orig_top and orig_height for all windows in the tree.
3674 If ACTION is RESTORE_ORIG_SIZES, restore top and height from
3675 values stored in orig_top and orig_height for all windows. */
3678 save_restore_orig_size (w
, action
)
3680 enum save_restore_action action
;
3686 if (!NILP (w
->hchild
))
3688 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
3691 else if (!NILP (w
->vchild
))
3693 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
3699 case CHECK_ORIG_SIZES
:
3700 if (!INTEGERP (w
->orig_top
) || !INTEGERP (w
->orig_height
))
3704 case SAVE_ORIG_SIZES
:
3705 w
->orig_top
= w
->top
;
3706 w
->orig_height
= w
->height
;
3707 XSETFASTINT (w
->last_modified
, 0);
3708 XSETFASTINT (w
->last_overlay_modified
, 0);
3711 case RESTORE_ORIG_SIZES
:
3712 xassert (INTEGERP (w
->orig_top
) && INTEGERP (w
->orig_height
));
3713 w
->top
= w
->orig_top
;
3714 w
->height
= w
->orig_height
;
3715 w
->orig_height
= w
->orig_top
= Qnil
;
3716 XSETFASTINT (w
->last_modified
, 0);
3717 XSETFASTINT (w
->last_overlay_modified
, 0);
3724 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
3731 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
3732 without deleting other windows. */
3735 grow_mini_window (w
, delta
)
3739 struct frame
*f
= XFRAME (w
->frame
);
3740 struct window
*root
;
3742 xassert (MINI_WINDOW_P (w
));
3743 xassert (delta
>= 0);
3745 /* Check values of window_min_width and window_min_height for
3747 check_min_window_sizes ();
3749 /* Compute how much we can enlarge the mini-window without deleting
3751 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3754 int min_height
= window_min_size (root
, 0, 0, 0);
3755 if (XFASTINT (root
->height
) - delta
< min_height
)
3756 delta
= XFASTINT (root
->height
) - min_height
;
3761 /* Save original window sizes and positions, if not already done. */
3762 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3763 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
3765 /* Shrink other windows. */
3766 shrink_window_lowest_first (root
, XFASTINT (root
->height
) - delta
);
3768 /* Grow the mini-window. */
3769 w
->top
= make_number (XFASTINT (root
->top
) + XFASTINT (root
->height
));
3770 w
->height
= make_number (XFASTINT (w
->height
) + delta
);
3771 XSETFASTINT (w
->last_modified
, 0);
3772 XSETFASTINT (w
->last_overlay_modified
, 0);
3779 /* Shrink mini-window W. If there is recorded info about window sizes
3780 before a call to grow_mini_window, restore recorded window sizes.
3781 Otherwise, if the mini-window is higher than 1 line, resize it to 1
3785 shrink_mini_window (w
)
3788 struct frame
*f
= XFRAME (w
->frame
);
3789 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3791 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3793 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
3795 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3796 windows_or_buffers_changed
= 1;
3798 else if (XFASTINT (w
->height
) > 1)
3801 XSETWINDOW (window
, w
);
3802 enlarge_window (window
, 1 - XFASTINT (w
->height
), 0);
3808 /* Mark window cursors off for all windows in the window tree rooted
3809 at W by setting their phys_cursor_on_p flag to zero. Called from
3810 xterm.c, e.g. when a frame is cleared and thereby all cursors on
3811 the frame are cleared. */
3814 mark_window_cursors_off (w
)
3819 if (!NILP (w
->hchild
))
3820 mark_window_cursors_off (XWINDOW (w
->hchild
));
3821 else if (!NILP (w
->vchild
))
3822 mark_window_cursors_off (XWINDOW (w
->vchild
));
3824 w
->phys_cursor_on_p
= 0;
3826 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3831 /* Return number of lines of text (not counting mode line) in W. */
3834 window_internal_height (w
)
3837 int ht
= XFASTINT (w
->height
);
3839 if (MINI_WINDOW_P (w
))
3842 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
3843 || !NILP (w
->next
) || !NILP (w
->prev
)
3844 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
3851 /* Return the number of columns in W.
3852 Don't count columns occupied by scroll bars or the vertical bar
3853 separating W from the sibling to its right. */
3856 window_internal_width (w
)
3859 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3860 int width
= XINT (w
->width
);
3862 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3863 /* Scroll bars occupy a few columns. */
3864 width
-= FRAME_SCROLL_BAR_COLS (f
);
3865 else if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
3866 /* The column of `|' characters separating side-by-side windows
3867 occupies one column only. */
3870 /* On window-systems, areas to the left and right of the window
3871 are used to display bitmaps there. */
3872 if (FRAME_WINDOW_P (f
))
3873 width
-= FRAME_FLAGS_AREA_COLS (f
);
3879 /************************************************************************
3881 ***********************************************************************/
3883 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
3884 one screen-full, which is defined as the height of the window minus
3885 next_screen_context_lines. If WHOLE is zero, scroll up N lines
3886 instead. Negative values of N mean scroll down. NOERROR non-zero
3887 means don't signal an error if we try to move over BEGV or ZV,
3891 window_scroll (window
, n
, whole
, noerror
)
3897 /* If we must, use the pixel-based version which is much slower than
3898 the line-based one but can handle varying line heights. */
3899 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
3900 window_scroll_pixel_based (window
, n
, whole
, noerror
);
3902 window_scroll_line_based (window
, n
, whole
, noerror
);
3906 /* Implementation of window_scroll that works based on pixel line
3907 heights. See the comment of window_scroll for parameter
3911 window_scroll_pixel_based (window
, n
, whole
, noerror
)
3918 struct window
*w
= XWINDOW (window
);
3919 struct text_pos start
;
3921 int this_scroll_margin
;
3923 /* True if we fiddled the window vscroll field without really scrolling. */
3926 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
3928 /* If PT is not visible in WINDOW, move back one half of
3930 tem
= Fpos_visible_in_window_p (make_number (PT
), window
, Qnil
);
3933 /* Move backward half the height of the window. Performance note:
3934 vmotion used here is about 10% faster, but would give wrong
3935 results for variable height lines. */
3936 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3937 it
.current_y
= it
.last_visible_y
;
3938 move_it_vertically (&it
, -it
.last_visible_y
/ 2);
3940 /* The function move_iterator_vertically may move over more than
3941 the specified y-distance. If it->w is small, e.g. a
3942 mini-buffer window, we may end up in front of the window's
3943 display area. This is the case when Start displaying at the
3944 start of the line containing PT in this case. */
3945 if (it
.current_y
<= 0)
3947 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3948 move_it_vertically (&it
, 0);
3952 start
= it
.current
.pos
;
3955 /* If scroll_preserve_screen_position is non-zero, we try to set
3956 point in the same window line as it is now, so get that line. */
3957 if (!NILP (Vscroll_preserve_screen_position
))
3959 start_display (&it
, w
, start
);
3960 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
3961 preserve_y
= it
.current_y
;
3966 /* Move iterator it from start the specified distance forward or
3967 backward. The result is the new window start. */
3968 start_display (&it
, w
, start
);
3971 int screen_full
= (it
.last_visible_y
3972 - next_screen_context_lines
* CANON_Y_UNIT (it
.f
));
3973 int direction
= n
< 0 ? -1 : 1;
3974 int dy
= direction
* screen_full
;
3976 /* Note that move_it_vertically always moves the iterator to the
3977 start of a line. So, if the last line doesn't have a newline,
3978 we would end up at the start of the line ending at ZV. */
3980 move_it_vertically_backward (&it
, -dy
);
3982 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
3983 MOVE_TO_POS
| MOVE_TO_Y
);
3986 move_it_by_lines (&it
, n
, 1);
3988 /* End if we end up at ZV or BEGV. */
3989 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
3990 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
3992 if (IT_CHARPOS (it
) == ZV
)
3994 if (it
.current_y
+ it
.max_ascent
+ it
.max_descent
3995 > it
.last_visible_y
)
3996 /* The last line was only partially visible, make it fully
3998 w
->vscroll
= (it
.last_visible_y
3999 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4003 Fsignal (Qend_of_buffer
, Qnil
);
4007 if (w
->vscroll
!= 0)
4008 /* The first line was only partially visible, make it fully
4014 Fsignal (Qbeginning_of_buffer
, Qnil
);
4017 /* If control gets here, then we vscrolled. */
4019 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4021 /* Don't try to change the window start below. */
4027 /* Set the window start, and set up the window for redisplay. */
4028 set_marker_restricted (w
->start
, make_number (IT_CHARPOS (it
)),
4030 w
->start_at_line_beg
= Fbolp ();
4031 w
->update_mode_line
= Qt
;
4032 XSETFASTINT (w
->last_modified
, 0);
4033 XSETFASTINT (w
->last_overlay_modified
, 0);
4034 /* Set force_start so that redisplay_window will run the
4035 window-scroll-functions. */
4036 w
->force_start
= Qt
;
4039 it
.current_y
= it
.vpos
= 0;
4041 /* Preserve the screen position if we must. */
4042 if (preserve_y
>= 0)
4044 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4045 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4049 /* Move PT out of scroll margins. */
4050 this_scroll_margin
= max (0, scroll_margin
);
4051 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
4052 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
4056 /* We moved the window start towards ZV, so PT may be now
4057 in the scroll margin at the top. */
4058 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4059 while (it
.current_y
< this_scroll_margin
)
4060 move_it_by_lines (&it
, 1, 1);
4061 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4065 int charpos
, bytepos
;
4067 /* We moved the window start towards BEGV, so PT may be now
4068 in the scroll margin at the bottom. */
4069 move_it_to (&it
, PT
, -1,
4070 it
.last_visible_y
- this_scroll_margin
- 1, -1,
4071 MOVE_TO_POS
| MOVE_TO_Y
);
4073 /* Save our position, in case it's correct. */
4074 charpos
= IT_CHARPOS (it
);
4075 bytepos
= IT_BYTEPOS (it
);
4077 /* See if point is on a partially visible line at the end. */
4078 move_it_by_lines (&it
, 1, 1);
4079 if (it
.current_y
> it
.last_visible_y
)
4080 /* The last line was only partially visible, so back up two
4081 lines to make sure we're on a fully visible line. */
4083 move_it_by_lines (&it
, -2, 0);
4084 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4087 /* No, the position we saved is OK, so use it. */
4088 SET_PT_BOTH (charpos
, bytepos
);
4094 /* Implementation of window_scroll that works based on screen lines.
4095 See the comment of window_scroll for parameter descriptions. */
4098 window_scroll_line_based (window
, n
, whole
, noerror
)
4104 register struct window
*w
= XWINDOW (window
);
4105 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4106 register int pos
, pos_byte
;
4107 register int ht
= window_internal_height (w
);
4108 register Lisp_Object tem
;
4112 struct position posit
;
4115 startpos
= marker_position (w
->start
);
4117 posit
= *compute_motion (startpos
, 0, 0, 0,
4119 window_internal_width (w
), XINT (w
->hscroll
),
4121 original_vpos
= posit
.vpos
;
4123 XSETFASTINT (tem
, PT
);
4124 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4128 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4133 lose
= n
< 0 && PT
== BEGV
;
4134 Fvertical_motion (make_number (n
), window
);
4138 SET_PT_BOTH (opoint
, opoint_byte
);
4145 Fsignal (Qbeginning_of_buffer
, Qnil
);
4150 int this_scroll_margin
= scroll_margin
;
4152 /* Don't use a scroll margin that is negative or too large. */
4153 if (this_scroll_margin
< 0)
4154 this_scroll_margin
= 0;
4156 if (XINT (w
->height
) < 4 * scroll_margin
)
4157 this_scroll_margin
= XINT (w
->height
) / 4;
4159 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4160 w
->start_at_line_beg
= bolp
;
4161 w
->update_mode_line
= Qt
;
4162 XSETFASTINT (w
->last_modified
, 0);
4163 XSETFASTINT (w
->last_overlay_modified
, 0);
4164 /* Set force_start so that redisplay_window will run
4165 the window-scroll-functions. */
4166 w
->force_start
= Qt
;
4168 if (whole
&& !NILP (Vscroll_preserve_screen_position
))
4170 SET_PT_BOTH (pos
, pos_byte
);
4171 Fvertical_motion (make_number (original_vpos
), window
);
4173 /* If we scrolled forward, put point enough lines down
4174 that it is outside the scroll margin. */
4179 if (this_scroll_margin
> 0)
4181 SET_PT_BOTH (pos
, pos_byte
);
4182 Fvertical_motion (make_number (this_scroll_margin
), window
);
4188 if (top_margin
<= opoint
)
4189 SET_PT_BOTH (opoint
, opoint_byte
);
4190 else if (!NILP (Vscroll_preserve_screen_position
))
4192 SET_PT_BOTH (pos
, pos_byte
);
4193 Fvertical_motion (make_number (original_vpos
), window
);
4196 SET_PT (top_margin
);
4202 /* If we scrolled backward, put point near the end of the window
4203 but not within the scroll margin. */
4204 SET_PT_BOTH (pos
, pos_byte
);
4205 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4206 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4209 bottom_margin
= PT
+ 1;
4211 if (bottom_margin
> opoint
)
4212 SET_PT_BOTH (opoint
, opoint_byte
);
4215 if (!NILP (Vscroll_preserve_screen_position
))
4217 SET_PT_BOTH (pos
, pos_byte
);
4218 Fvertical_motion (make_number (original_vpos
), window
);
4221 Fvertical_motion (make_number (-1), window
);
4230 Fsignal (Qend_of_buffer
, Qnil
);
4235 /* Scroll selected_window up or down. If N is nil, scroll a
4236 screen-full which is defined as the height of the window minus
4237 next_screen_context_lines. If N is the symbol `-', scroll.
4238 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
4239 up. This is the guts of Fscroll_up and Fscroll_down. */
4242 scroll_command (n
, direction
)
4246 register int defalt
;
4247 int count
= specpdl_ptr
- specpdl
;
4249 xassert (abs (direction
) == 1);
4251 /* If selected window's buffer isn't current, make it current for
4252 the moment. But don't screw up if window_scroll gets an error. */
4253 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
4255 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4256 Fset_buffer (XWINDOW (selected_window
)->buffer
);
4258 /* Make redisplay consider other windows than just selected_window. */
4259 ++windows_or_buffers_changed
;
4262 defalt
= (window_internal_height (XWINDOW (selected_window
))
4263 - next_screen_context_lines
);
4264 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
4267 window_scroll (selected_window
, defalt
, 1, 0);
4268 else if (EQ (n
, Qminus
))
4269 window_scroll (selected_window
, - defalt
, 1, 0);
4272 n
= Fprefix_numeric_value (n
);
4273 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
4276 unbind_to (count
, Qnil
);
4279 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
4280 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
4281 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4282 Negative ARG means scroll downward.\n\
4283 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4284 When calling from a program, supply as argument a number, nil, or `-'.")
4288 scroll_command (arg
, 1);
4292 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
4293 "Scroll text of current window down ARG lines; or near full screen if no ARG.\n\
4294 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4295 Negative ARG means scroll upward.\n\
4296 If ARG is the atom `-', scroll upward by nearly full screen.\n\
4297 When calling from a program, supply as argument a number, nil, or `-'.")
4301 scroll_command (arg
, -1);
4305 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
4306 "Return the other window for \"other window scroll\" commands.\n\
4307 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4308 specifies the window.\n\
4309 If `other-window-scroll-buffer' is non-nil, a window\n\
4310 showing that buffer is used.")
4315 if (MINI_WINDOW_P (XWINDOW (selected_window
))
4316 && !NILP (Vminibuf_scroll_window
))
4317 window
= Vminibuf_scroll_window
;
4318 /* If buffer is specified, scroll that buffer. */
4319 else if (!NILP (Vother_window_scroll_buffer
))
4321 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
4323 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
4327 /* Nothing specified; look for a neighboring window on the same
4329 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
4331 if (EQ (window
, selected_window
))
4332 /* That didn't get us anywhere; look for a window on another
4335 window
= Fnext_window (window
, Qnil
, Qt
);
4336 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
4337 && ! EQ (window
, selected_window
));
4340 CHECK_LIVE_WINDOW (window
, 0);
4342 if (EQ (window
, selected_window
))
4343 error ("There is no other window");
4348 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
4349 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
4350 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4351 The next window is the one below the current one; or the one at the top\n\
4352 if the current one is at the bottom. Negative ARG means scroll downward.\n\
4353 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4354 When calling from a program, supply as argument a number, nil, or `-'.\n\
4356 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4357 specifies the window to scroll.\n\
4358 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
4359 showing that buffer, popping the buffer up if necessary.")
4361 register Lisp_Object arg
;
4363 register Lisp_Object window
;
4364 register int defalt
;
4365 register struct window
*w
;
4366 register int count
= specpdl_ptr
- specpdl
;
4368 window
= Fother_window_for_scrolling ();
4370 w
= XWINDOW (window
);
4371 defalt
= window_internal_height (w
) - next_screen_context_lines
;
4372 if (defalt
< 1) defalt
= 1;
4374 /* Don't screw up if window_scroll gets an error. */
4375 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4376 ++windows_or_buffers_changed
;
4378 Fset_buffer (w
->buffer
);
4379 SET_PT (marker_position (w
->pointm
));
4382 window_scroll (window
, defalt
, 1, 1);
4383 else if (EQ (arg
, Qminus
))
4384 window_scroll (window
, -defalt
, 1, 1);
4389 CHECK_NUMBER (arg
, 0);
4390 window_scroll (window
, XINT (arg
), 0, 1);
4393 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
4394 unbind_to (count
, Qnil
);
4399 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
4400 "Scroll selected window display ARG columns left.\n\
4401 Default for ARG is window width minus 2.")
4403 register Lisp_Object arg
;
4407 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
4409 arg
= Fprefix_numeric_value (arg
);
4412 Fset_window_hscroll (selected_window
,
4413 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
4417 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
4418 "Scroll selected window display ARG columns right.\n\
4419 Default for ARG is window width minus 2.")
4421 register Lisp_Object arg
;
4424 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
4426 arg
= Fprefix_numeric_value (arg
);
4429 Fset_window_hscroll (selected_window
,
4430 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
4434 /* Value is the number of lines actually displayed in window W,
4435 as opposed to its height. */
4438 displayed_window_lines (w
)
4442 struct text_pos start
;
4443 int height
= window_box_height (w
);
4444 struct buffer
*old_buffer
;
4447 if (XBUFFER (w
->buffer
) != current_buffer
)
4449 old_buffer
= current_buffer
;
4450 set_buffer_internal (XBUFFER (w
->buffer
));
4455 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4456 start_display (&it
, w
, start
);
4457 move_it_vertically (&it
, height
);
4460 set_buffer_internal (old_buffer
);
4462 bottom_y
= it
.current_y
+ it
.max_ascent
+ it
.max_descent
;
4464 if (bottom_y
> it
.current_y
&& bottom_y
<= it
.last_visible_y
)
4465 /* Hit a line without a terminating newline. */
4468 /* Add in empty lines at the bottom of the window. */
4469 if (bottom_y
< height
)
4471 struct frame
*f
= XFRAME (w
->frame
);
4472 int rest
= height
- bottom_y
;
4473 int lines
= rest
/ CANON_Y_UNIT (f
);
4481 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
4482 "Center point in window and redisplay frame.\n\
4483 With prefix argument ARG, recenter putting point on screen line ARG\n\
4484 relative to the current window. If ARG is negative, it counts up from the\n\
4485 bottom of the window. (ARG should be less than the height of the window.)\n\
4487 If ARG is omitted or nil, erase the entire frame and then\n\
4488 redraw with point in the center of the current window.\n\
4489 Just C-u as prefix means put point in the center of the window\n\
4490 and redisplay normally--don't erase and redraw the frame.")
4492 register Lisp_Object arg
;
4494 struct window
*w
= XWINDOW (selected_window
);
4495 struct buffer
*buf
= XBUFFER (w
->buffer
);
4496 struct buffer
*obuf
= current_buffer
;
4498 int charpos
, bytepos
;
4504 /* Invalidate pixel data calculated for all compositions. */
4505 for (i
= 0; i
< n_compositions
; i
++)
4506 composition_table
[i
]->font
= NULL
;
4508 Fredraw_frame (w
->frame
);
4509 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
4512 else if (CONSP (arg
)) /* Just C-u. */
4516 arg
= Fprefix_numeric_value (arg
);
4517 CHECK_NUMBER (arg
, 0);
4520 set_buffer_internal (buf
);
4522 /* Handle centering on a gfaphical frame specially. Such frames can
4523 have variable-height lines and centering point on the basis of
4524 line counts would lead to strange effects. */
4525 if (center_p
&& FRAME_WINDOW_P (XFRAME (w
->frame
)))
4530 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
4531 start_display (&it
, w
, pt
);
4532 move_it_vertically (&it
, - it
.last_visible_y
/ 2);
4533 charpos
= IT_CHARPOS (it
);
4534 bytepos
= IT_BYTEPOS (it
);
4538 struct position pos
;
4542 int ht
= displayed_window_lines (w
);
4543 arg
= make_number (ht
/ 2);
4545 else if (XINT (arg
) < 0)
4547 int ht
= displayed_window_lines (w
);
4548 XSETINT (arg
, XINT (arg
) + ht
);
4551 pos
= *vmotion (PT
, - XINT (arg
), w
);
4552 charpos
= pos
.bufpos
;
4553 bytepos
= pos
.bytepos
;
4556 /* Set the new window start. */
4557 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
4558 w
->force_start
= Qt
;
4559 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
4560 w
->start_at_line_beg
= Qt
;
4562 w
->start_at_line_beg
= Qnil
;
4564 set_buffer_internal (obuf
);
4569 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
4571 "Return the height in lines of the text display area of WINDOW.\n\
4572 This doesn't include the mode-line (or header-line if any) or any\n\
4573 partial-height lines in the text display area.")
4577 struct window
*w
= decode_window (window
);
4578 int pixel_height
= window_box_height (w
);
4579 int line_height
= pixel_height
/ CANON_Y_UNIT (XFRAME (w
->frame
));
4580 return make_number (line_height
);
4585 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
4587 "Position point relative to window.\n\
4588 With no argument, position point at center of window.\n\
4589 An argument specifies vertical position within the window;\n\
4590 zero means top of window, negative means relative to bottom of window.")
4594 struct window
*w
= XWINDOW (selected_window
);
4598 window
= selected_window
;
4599 start
= marker_position (w
->start
);
4600 if (start
< BEGV
|| start
> ZV
)
4602 int height
= window_internal_height (w
);
4603 Fvertical_motion (make_number (- (height
/ 2)), window
);
4604 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
4605 w
->start_at_line_beg
= Fbolp ();
4606 w
->force_start
= Qt
;
4609 Fgoto_char (w
->start
);
4611 lines
= displayed_window_lines (w
);
4613 XSETFASTINT (arg
, lines
/ 2);
4616 arg
= Fprefix_numeric_value (arg
);
4618 XSETINT (arg
, XINT (arg
) + lines
);
4622 /* Skip past a partially visible first line. */
4623 XSETINT (arg
, XINT (arg
) + 1);
4625 return Fvertical_motion (arg
, window
);
4630 /***********************************************************************
4631 Window Configuration
4632 ***********************************************************************/
4634 struct save_window_data
4636 EMACS_INT size_from_Lisp_Vector_struct
;
4637 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4638 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
4639 Lisp_Object frame_tool_bar_lines
;
4640 Lisp_Object selected_frame
;
4641 Lisp_Object current_window
;
4642 Lisp_Object current_buffer
;
4643 Lisp_Object minibuf_scroll_window
;
4644 Lisp_Object root_window
;
4645 Lisp_Object focus_frame
;
4646 /* Record the values of window-min-width and window-min-height
4647 so that window sizes remain consistent with them. */
4648 Lisp_Object min_width
, min_height
;
4649 /* A vector, each of whose elements is a struct saved_window
4651 Lisp_Object saved_windows
;
4654 /* This is saved as a Lisp_Vector */
4657 /* these first two must agree with struct Lisp_Vector in lisp.h */
4658 EMACS_INT size_from_Lisp_Vector_struct
;
4659 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4662 Lisp_Object buffer
, start
, pointm
, mark
;
4663 Lisp_Object left
, top
, width
, height
, hscroll
, min_hscroll
;
4664 Lisp_Object parent
, prev
;
4665 Lisp_Object start_at_line_beg
;
4666 Lisp_Object display_table
;
4667 Lisp_Object orig_top
, orig_height
;
4670 #define SAVED_WINDOW_VECTOR_SIZE 17 /* Arg to Fmake_vector */
4672 #define SAVED_WINDOW_N(swv,n) \
4673 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
4675 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
4676 "Return t if OBJECT is a window-configuration object.")
4680 if (WINDOW_CONFIGURATIONP (object
))
4685 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
4686 "Return the frame that CONFIG, a window-configuration object, is about.")
4690 register struct save_window_data
*data
;
4691 struct Lisp_Vector
*saved_windows
;
4693 if (! WINDOW_CONFIGURATIONP (config
))
4694 wrong_type_argument (Qwindow_configuration_p
, config
);
4696 data
= (struct save_window_data
*) XVECTOR (config
);
4697 saved_windows
= XVECTOR (data
->saved_windows
);
4698 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4701 DEFUN ("set-window-configuration", Fset_window_configuration
,
4702 Sset_window_configuration
, 1, 1, 0,
4703 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
4704 CONFIGURATION must be a value previously returned\n\
4705 by `current-window-configuration' (which see).\n\
4706 If CONFIGURATION was made from a frame that is now deleted,\n\
4707 only frame-independent values can be restored. In this case,\n\
4708 the return value is nil. Otherwise the value is t.")
4710 Lisp_Object configuration
;
4712 register struct save_window_data
*data
;
4713 struct Lisp_Vector
*saved_windows
;
4714 Lisp_Object new_current_buffer
;
4719 while (!WINDOW_CONFIGURATIONP (configuration
))
4720 wrong_type_argument (Qwindow_configuration_p
, configuration
);
4722 data
= (struct save_window_data
*) XVECTOR (configuration
);
4723 saved_windows
= XVECTOR (data
->saved_windows
);
4725 new_current_buffer
= data
->current_buffer
;
4726 if (NILP (XBUFFER (new_current_buffer
)->name
))
4727 new_current_buffer
= Qnil
;
4730 if (XBUFFER (new_current_buffer
) == current_buffer
)
4734 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4737 /* If f is a dead frame, don't bother rebuilding its window tree.
4738 However, there is other stuff we should still try to do below. */
4739 if (FRAME_LIVE_P (f
))
4741 register struct window
*w
;
4742 register struct saved_window
*p
;
4743 struct window
*root_window
;
4744 struct window
**leaf_windows
;
4748 /* If the frame has been resized since this window configuration was
4749 made, we change the frame to the size specified in the
4750 configuration, restore the configuration, and then resize it
4751 back. We keep track of the prevailing height in these variables. */
4752 int previous_frame_height
= FRAME_HEIGHT (f
);
4753 int previous_frame_width
= FRAME_WIDTH (f
);
4754 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
4755 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
4757 /* The mouse highlighting code could get screwed up
4758 if it runs during this. */
4761 if (XFASTINT (data
->frame_height
) != previous_frame_height
4762 || XFASTINT (data
->frame_width
) != previous_frame_width
)
4763 change_frame_size (f
, XFASTINT (data
->frame_height
),
4764 XFASTINT (data
->frame_width
), 0, 0, 0);
4765 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4766 if (XFASTINT (data
->frame_menu_bar_lines
)
4767 != previous_frame_menu_bar_lines
)
4768 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
4769 #ifdef HAVE_WINDOW_SYSTEM
4770 if (XFASTINT (data
->frame_tool_bar_lines
)
4771 != previous_frame_tool_bar_lines
)
4772 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
4776 /* "Swap out" point from the selected window
4777 into its buffer. We do this now, before
4778 restoring the window contents, and prevent it from
4779 being done later on when we select a new window. */
4780 if (! NILP (XWINDOW (selected_window
)->buffer
))
4782 w
= XWINDOW (selected_window
);
4783 set_marker_both (w
->pointm
,
4785 BUF_PT (XBUFFER (w
->buffer
)),
4786 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4789 windows_or_buffers_changed
++;
4790 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4792 /* Problem: Freeing all matrices and later allocating them again
4793 is a serious redisplay flickering problem. What we would
4794 really like to do is to free only those matrices not reused
4796 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4798 = (struct window
**) alloca (count_windows (root_window
)
4799 * sizeof (struct window
*));
4800 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
4802 /* Temporarily avoid any problems with windows that are smaller
4803 than they are supposed to be. */
4804 window_min_height
= 1;
4805 window_min_width
= 1;
4808 Mark all windows now on frame as "deleted".
4809 Restoring the new configuration "undeletes" any that are in it.
4811 Save their current buffers in their height fields, since we may
4812 need it later, if a buffer saved in the configuration is now
4814 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
4816 for (k
= 0; k
< saved_windows
->size
; k
++)
4818 p
= SAVED_WINDOW_N (saved_windows
, k
);
4819 w
= XWINDOW (p
->window
);
4822 if (!NILP (p
->parent
))
4823 w
->parent
= SAVED_WINDOW_N (saved_windows
,
4824 XFASTINT (p
->parent
))->window
;
4828 if (!NILP (p
->prev
))
4830 w
->prev
= SAVED_WINDOW_N (saved_windows
,
4831 XFASTINT (p
->prev
))->window
;
4832 XWINDOW (w
->prev
)->next
= p
->window
;
4837 if (!NILP (w
->parent
))
4839 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
4841 XWINDOW (w
->parent
)->vchild
= p
->window
;
4842 XWINDOW (w
->parent
)->hchild
= Qnil
;
4846 XWINDOW (w
->parent
)->hchild
= p
->window
;
4847 XWINDOW (w
->parent
)->vchild
= Qnil
;
4852 /* If we squirreled away the buffer in the window's height,
4854 if (BUFFERP (w
->height
))
4855 w
->buffer
= w
->height
;
4858 w
->width
= p
->width
;
4859 w
->height
= p
->height
;
4860 w
->hscroll
= p
->hscroll
;
4861 w
->min_hscroll
= p
->min_hscroll
;
4862 w
->display_table
= p
->display_table
;
4863 w
->orig_top
= p
->orig_top
;
4864 w
->orig_height
= p
->orig_height
;
4865 XSETFASTINT (w
->last_modified
, 0);
4866 XSETFASTINT (w
->last_overlay_modified
, 0);
4868 /* Reinstall the saved buffer and pointers into it. */
4869 if (NILP (p
->buffer
))
4870 w
->buffer
= p
->buffer
;
4873 if (!NILP (XBUFFER (p
->buffer
)->name
))
4874 /* If saved buffer is alive, install it. */
4876 w
->buffer
= p
->buffer
;
4877 w
->start_at_line_beg
= p
->start_at_line_beg
;
4878 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
4879 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
4880 Fset_marker (XBUFFER (w
->buffer
)->mark
,
4881 p
->mark
, w
->buffer
);
4883 /* As documented in Fcurrent_window_configuration, don't
4884 save the location of point in the buffer which was current
4885 when the window configuration was recorded. */
4886 if (!EQ (p
->buffer
, new_current_buffer
)
4887 && XBUFFER (p
->buffer
) == current_buffer
)
4888 Fgoto_char (w
->pointm
);
4890 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
4891 /* Else unless window has a live buffer, get one. */
4893 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
4894 /* This will set the markers to beginning of visible
4896 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
4897 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
4898 w
->start_at_line_beg
= Qt
;
4901 /* Keeping window's old buffer; make sure the markers
4904 /* Set window markers at start of visible range. */
4905 if (XMARKER (w
->start
)->buffer
== 0)
4906 set_marker_restricted (w
->start
, make_number (0),
4908 if (XMARKER (w
->pointm
)->buffer
== 0)
4909 set_marker_restricted_both (w
->pointm
, w
->buffer
,
4910 BUF_PT (XBUFFER (w
->buffer
)),
4911 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4912 w
->start_at_line_beg
= Qt
;
4917 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
4918 /* Prevent "swapping out point" in the old selected window
4919 using the buffer that has been restored into it.
4920 That swapping out has already been done,
4921 near the beginning of this function. */
4922 selected_window
= Qnil
;
4923 Fselect_window (data
->current_window
);
4924 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
4927 if (NILP (data
->focus_frame
)
4928 || (FRAMEP (data
->focus_frame
)
4929 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
4930 Fredirect_frame_focus (frame
, data
->focus_frame
);
4932 #if 0 /* I don't understand why this is needed, and it causes problems
4933 when the frame's old selected window has been deleted. */
4934 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
4935 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
4939 /* Set the screen height to the value it had before this function. */
4940 if (previous_frame_height
!= FRAME_HEIGHT (f
)
4941 || previous_frame_width
!= FRAME_WIDTH (f
))
4942 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
4944 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4945 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
4946 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
4948 #ifdef HAVE_WINDOW_SYSTEM
4949 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
4950 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
4955 /* Now, free glyph matrices in windows that were not reused. */
4956 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
4958 if (NILP (leaf_windows
[i
]->buffer
))
4960 /* Assert it's not reused as a combination. */
4961 xassert (NILP (leaf_windows
[i
]->hchild
)
4962 && NILP (leaf_windows
[i
]->vchild
));
4963 free_window_matrices (leaf_windows
[i
]);
4965 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
4969 /* If more than one window shows the new and old current buffer,
4970 don't try to preserve point in that buffer. */
4971 if (old_point
> 0 && n
> 1)
4978 /* Fselect_window will have made f the selected frame, so we
4979 reselect the proper frame here. Fhandle_switch_frame will change the
4980 selected window too, but that doesn't make the call to
4981 Fselect_window above totally superfluous; it still sets f's
4983 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
4984 do_switch_frame (data
->selected_frame
, Qnil
, 0);
4986 if (! NILP (Vwindow_configuration_change_hook
)
4987 && ! NILP (Vrun_hooks
))
4988 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4991 if (!NILP (new_current_buffer
))
4993 Fset_buffer (new_current_buffer
);
4995 /* If the buffer that is current now is the same
4996 that was current before setting the window configuration,
4997 don't alter its PT. */
5002 /* Restore the minimum heights recorded in the configuration. */
5003 window_min_height
= XINT (data
->min_height
);
5004 window_min_width
= XINT (data
->min_width
);
5006 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
5008 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
5011 /* Mark all windows now on frame as deleted
5012 by setting their buffers to nil. */
5015 delete_all_subwindows (w
)
5016 register struct window
*w
;
5018 if (!NILP (w
->next
))
5019 delete_all_subwindows (XWINDOW (w
->next
));
5020 if (!NILP (w
->vchild
))
5021 delete_all_subwindows (XWINDOW (w
->vchild
));
5022 if (!NILP (w
->hchild
))
5023 delete_all_subwindows (XWINDOW (w
->hchild
));
5025 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
5027 if (!NILP (w
->buffer
))
5030 /* We set all three of these fields to nil, to make sure that we can
5031 distinguish this dead window from any live window. Live leaf
5032 windows will have buffer set, and combination windows will have
5033 vchild or hchild set. */
5038 Vwindow_list
= Qnil
;
5042 count_windows (window
)
5043 register struct window
*window
;
5045 register int count
= 1;
5046 if (!NILP (window
->next
))
5047 count
+= count_windows (XWINDOW (window
->next
));
5048 if (!NILP (window
->vchild
))
5049 count
+= count_windows (XWINDOW (window
->vchild
));
5050 if (!NILP (window
->hchild
))
5051 count
+= count_windows (XWINDOW (window
->hchild
));
5056 /* Fill vector FLAT with leaf windows under W, starting at index I.
5057 Value is last index + 1. */
5060 get_leaf_windows (w
, flat
, i
)
5062 struct window
**flat
;
5067 if (!NILP (w
->hchild
))
5068 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
5069 else if (!NILP (w
->vchild
))
5070 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
5074 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5081 /* Return a pointer to the glyph W's physical cursor is on. Value is
5082 null if W's current matrix is invalid, so that no meaningfull glyph
5086 get_phys_cursor_glyph (w
)
5089 struct glyph_row
*row
;
5090 struct glyph
*glyph
;
5092 if (w
->phys_cursor
.vpos
>= 0
5093 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
5094 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
5096 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
5097 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
5106 save_window_save (window
, vector
, i
)
5108 struct Lisp_Vector
*vector
;
5111 register struct saved_window
*p
;
5112 register struct window
*w
;
5113 register Lisp_Object tem
;
5115 for (;!NILP (window
); window
= w
->next
)
5117 p
= SAVED_WINDOW_N (vector
, i
);
5118 w
= XWINDOW (window
);
5120 XSETFASTINT (w
->temslot
, i
++);
5122 p
->buffer
= w
->buffer
;
5125 p
->width
= w
->width
;
5126 p
->height
= w
->height
;
5127 p
->hscroll
= w
->hscroll
;
5128 p
->min_hscroll
= w
->min_hscroll
;
5129 p
->display_table
= w
->display_table
;
5130 p
->orig_top
= w
->orig_top
;
5131 p
->orig_height
= w
->orig_height
;
5132 if (!NILP (w
->buffer
))
5134 /* Save w's value of point in the window configuration.
5135 If w is the selected window, then get the value of point
5136 from the buffer; pointm is garbage in the selected window. */
5137 if (EQ (window
, selected_window
))
5139 p
->pointm
= Fmake_marker ();
5140 set_marker_both (p
->pointm
, w
->buffer
,
5141 BUF_PT (XBUFFER (w
->buffer
)),
5142 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5145 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
5147 p
->start
= Fcopy_marker (w
->start
, Qnil
);
5148 p
->start_at_line_beg
= w
->start_at_line_beg
;
5150 tem
= XBUFFER (w
->buffer
)->mark
;
5151 p
->mark
= Fcopy_marker (tem
, Qnil
);
5158 p
->start_at_line_beg
= Qnil
;
5161 if (NILP (w
->parent
))
5164 p
->parent
= XWINDOW (w
->parent
)->temslot
;
5169 p
->prev
= XWINDOW (w
->prev
)->temslot
;
5171 if (!NILP (w
->vchild
))
5172 i
= save_window_save (w
->vchild
, vector
, i
);
5173 if (!NILP (w
->hchild
))
5174 i
= save_window_save (w
->hchild
, vector
, i
);
5180 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
5181 Scurrent_window_configuration
, 0, 1, 0,
5182 "Return an object representing the current window configuration of FRAME.\n\
5183 If FRAME is nil or omitted, use the selected frame.\n\
5184 This describes the number of windows, their sizes and current buffers,\n\
5185 and for each displayed buffer, where display starts, and the positions of\n\
5186 point and mark. An exception is made for point in the current buffer:\n\
5187 its value is -not- saved.\n\
5188 This also records the currently selected frame, and FRAME's focus\n\
5189 redirection (see `redirect-frame-focus').")
5193 register Lisp_Object tem
;
5194 register int n_windows
;
5195 register struct save_window_data
*data
;
5196 register struct Lisp_Vector
*vec
;
5201 frame
= selected_frame
;
5202 CHECK_LIVE_FRAME (frame
, 0);
5205 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5206 vec
= allocate_vectorlike (VECSIZE (struct save_window_data
));
5207 for (i
= 0; i
< VECSIZE (struct save_window_data
); i
++)
5208 vec
->contents
[i
] = Qnil
;
5209 vec
->size
= VECSIZE (struct save_window_data
);
5210 data
= (struct save_window_data
*)vec
;
5212 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
5213 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
5214 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
5215 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
5216 data
->selected_frame
= selected_frame
;
5217 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
5218 XSETBUFFER (data
->current_buffer
, current_buffer
);
5219 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
5220 data
->root_window
= FRAME_ROOT_WINDOW (f
);
5221 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
5222 XSETINT (data
->min_height
, window_min_height
);
5223 XSETINT (data
->min_width
, window_min_width
);
5224 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
5225 data
->saved_windows
= tem
;
5226 for (i
= 0; i
< n_windows
; i
++)
5227 XVECTOR (tem
)->contents
[i
]
5228 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
5229 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
5230 XSETWINDOW_CONFIGURATION (tem
, data
);
5234 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
5236 "Execute body, preserving window sizes and contents.\n\
5237 Restore which buffer appears in which window, where display starts,\n\
5238 and the value of point and mark for each window.\n\
5239 Also restore the choice of selected window.\n\
5240 Also restore which buffer is current.\n\
5241 Does not restore the value of point in current buffer.")
5245 register Lisp_Object val
;
5246 register int count
= specpdl_ptr
- specpdl
;
5248 record_unwind_protect (Fset_window_configuration
,
5249 Fcurrent_window_configuration (Qnil
));
5250 val
= Fprogn (args
);
5251 return unbind_to (count
, val
);
5255 /***********************************************************************
5257 ***********************************************************************/
5259 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
5261 "Set width of marginal areas of window WINDOW.\n\
5262 If window is nil, set margins of the currently selected window.\n\
5263 First parameter LEFT-WIDTH specifies the number of character\n\
5264 cells to reserve for the left marginal area. Second parameter\n\
5265 RIGHT-WIDTH does the same for the right marginal area.\n\
5266 A nil width parameter means no margin.")
5267 (window
, left
, right
)
5268 Lisp_Object window
, left
, right
;
5270 struct window
*w
= decode_window (window
);
5273 CHECK_NUMBER_OR_FLOAT (left
, 1);
5275 CHECK_NUMBER_OR_FLOAT (right
, 2);
5277 /* Check widths < 0 and translate a zero width to nil.
5278 Margins that are too wide have to be checked elsewhere. */
5279 if ((INTEGERP (left
) && XINT (left
) < 0)
5280 || (FLOATP (left
) && XFLOAT_DATA (left
) <= 0))
5281 XSETFASTINT (left
, 0);
5282 if (INTEGERP (left
) && XFASTINT (left
) == 0)
5285 if ((INTEGERP (right
) && XINT (right
) < 0)
5286 || (FLOATP (right
) && XFLOAT_DATA (right
) <= 0))
5287 XSETFASTINT (right
, 0);
5288 if (INTEGERP (right
) && XFASTINT (right
) == 0)
5291 w
->left_margin_width
= left
;
5292 w
->right_margin_width
= right
;
5294 ++windows_or_buffers_changed
;
5295 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
5300 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
5302 "Get width of marginal areas of window WINDOW.\n\
5303 If WINDOW is omitted or nil, use the currently selected window.\n\
5304 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).\n\
5305 If a marginal area does not exist, its width will be returned\n\
5310 struct window
*w
= decode_window (window
);
5311 return Fcons (w
->left_margin_width
, w
->right_margin_width
);
5316 /***********************************************************************
5318 ***********************************************************************/
5320 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 1, 0,
5321 "Return the amount by which WINDOW is scrolled vertically.\n\
5322 Use the selected window if WINDOW is nil or omitted.\n\
5323 Value is a multiple of the canonical character height of WINDOW.")
5332 window
= selected_window
;
5334 CHECK_WINDOW (window
, 0);
5335 w
= XWINDOW (window
);
5336 f
= XFRAME (w
->frame
);
5338 if (FRAME_WINDOW_P (f
))
5339 result
= CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
);
5341 result
= make_number (0);
5346 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
5348 "Set amount by which WINDOW should be scrolled vertically to VSCROLL.\n\
5349 WINDOW nil or omitted means use the selected window. VSCROLL is a\n\
5350 non-negative multiple of the canonical character height of WINDOW.")
5352 Lisp_Object window
, vscroll
;
5358 window
= selected_window
;
5360 CHECK_WINDOW (window
, 0);
5361 CHECK_NUMBER_OR_FLOAT (vscroll
, 1);
5363 w
= XWINDOW (window
);
5364 f
= XFRAME (w
->frame
);
5366 if (FRAME_WINDOW_P (f
))
5368 int old_dy
= w
->vscroll
;
5370 w
->vscroll
= - CANON_Y_UNIT (f
) * XFLOATINT (vscroll
);
5371 w
->vscroll
= min (w
->vscroll
, 0);
5373 /* Adjust glyph matrix of the frame if the virtual display
5374 area becomes larger than before. */
5375 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
5378 /* Prevent redisplay shortcuts. */
5379 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5382 return Fwindow_vscroll (window
);
5386 /* Call FN for all leaf windows on frame F. FN is called with the
5387 first argument being a pointer to the leaf window, and with
5388 additional argument USER_DATA. Stops when FN returns 0. */
5391 foreach_window (f
, fn
, user_data
)
5393 int (* fn
) P_ ((struct window
*, void *));
5396 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
5400 /* Helper function for foreach_window. Call FN for all leaf windows
5401 reachable from W. FN is called with the first argument being a
5402 pointer to the leaf window, and with additional argument USER_DATA.
5403 Stop when FN returns 0. Value is 0 if stopped by FN. */
5406 foreach_window_1 (w
, fn
, user_data
)
5408 int (* fn
) P_ ((struct window
*, void *));
5413 for (cont
= 1; w
&& cont
;)
5415 if (!NILP (w
->hchild
))
5416 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
5417 else if (!NILP (w
->vchild
))
5418 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
5420 cont
= fn (w
, user_data
);
5422 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5429 /* Freeze or unfreeze the window start of W if unless it is a
5430 mini-window or the selected window. FREEZE_P non-null means freeze
5431 the window start. */
5434 freeze_window_start (w
, freeze_p
)
5438 if (w
== XWINDOW (selected_window
)
5439 || MINI_WINDOW_P (w
)
5440 || (MINI_WINDOW_P (XWINDOW (selected_window
))
5441 && ! NILP (Vminibuf_scroll_window
)
5442 && w
== XWINDOW (Vminibuf_scroll_window
)))
5445 w
->frozen_window_start_p
= freeze_p
!= NULL
;
5450 /* Freeze or unfreeze the window starts of all leaf windows on frame
5451 F, except the selected window and a mini-window. FREEZE_P non-zero
5452 means freeze the window start. */
5455 freeze_window_starts (f
, freeze_p
)
5459 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
5463 /***********************************************************************
5465 ***********************************************************************/
5467 /* Return 1 if window configurations C1 and C2
5468 describe the same state of affairs. This is used by Fequal. */
5471 compare_window_configurations (c1
, c2
, ignore_positions
)
5473 int ignore_positions
;
5475 register struct save_window_data
*d1
, *d2
;
5476 struct Lisp_Vector
*sw1
, *sw2
;
5479 if (!WINDOW_CONFIGURATIONP (c1
))
5480 wrong_type_argument (Qwindow_configuration_p
, c1
);
5481 if (!WINDOW_CONFIGURATIONP (c2
))
5482 wrong_type_argument (Qwindow_configuration_p
, c2
);
5484 d1
= (struct save_window_data
*) XVECTOR (c1
);
5485 d2
= (struct save_window_data
*) XVECTOR (c2
);
5486 sw1
= XVECTOR (d1
->saved_windows
);
5487 sw2
= XVECTOR (d2
->saved_windows
);
5489 if (! EQ (d1
->frame_width
, d2
->frame_width
))
5491 if (! EQ (d1
->frame_height
, d2
->frame_height
))
5493 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
5495 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
5497 /* Don't compare the current_window field directly.
5498 Instead see w1_is_current and w2_is_current, below. */
5499 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
5501 if (! ignore_positions
)
5502 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
5504 /* Don't compare the root_window field.
5505 We don't require the two configurations
5506 to use the same window object,
5507 and the two root windows must be equivalent
5508 if everything else compares equal. */
5509 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
5511 if (! EQ (d1
->min_width
, d2
->min_width
))
5513 if (! EQ (d1
->min_height
, d2
->min_height
))
5516 /* Verify that the two confis have the same number of windows. */
5517 if (sw1
->size
!= sw2
->size
)
5520 for (i
= 0; i
< sw1
->size
; i
++)
5522 struct saved_window
*p1
, *p2
;
5523 int w1_is_current
, w2_is_current
;
5525 p1
= SAVED_WINDOW_N (sw1
, i
);
5526 p2
= SAVED_WINDOW_N (sw2
, i
);
5528 /* Verify that the current windows in the two
5529 configurations correspond to each other. */
5530 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
5531 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
5533 if (w1_is_current
!= w2_is_current
)
5536 /* Verify that the corresponding windows do match. */
5537 if (! EQ (p1
->buffer
, p2
->buffer
))
5539 if (! EQ (p1
->left
, p2
->left
))
5541 if (! EQ (p1
->top
, p2
->top
))
5543 if (! EQ (p1
->width
, p2
->width
))
5545 if (! EQ (p1
->height
, p2
->height
))
5547 if (! EQ (p1
->display_table
, p2
->display_table
))
5549 if (! EQ (p1
->parent
, p2
->parent
))
5551 if (! EQ (p1
->prev
, p2
->prev
))
5553 if (! ignore_positions
)
5555 if (! EQ (p1
->hscroll
, p2
->hscroll
))
5557 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
5559 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
5561 if (NILP (Fequal (p1
->start
, p2
->start
)))
5563 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
5565 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
5573 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
5574 Scompare_window_configurations
, 2, 2, 0,
5575 "Compare two window configurations as regards the structure of windows.\n\
5576 This function ignores details such as the values of point and mark\n\
5577 and scrolling positions.")
5581 if (compare_window_configurations (x
, y
, 1))
5589 struct frame
*f
= make_terminal_frame ();
5590 XSETFRAME (selected_frame
, f
);
5591 Vterminal_frame
= selected_frame
;
5592 minibuf_window
= f
->minibuffer_window
;
5593 selected_window
= f
->selected_window
;
5594 last_nonminibuf_frame
= f
;
5596 window_initialized
= 1;
5602 Vwindow_list
= Qnil
;
5608 Qleft_bitmap_area
= intern ("left-bitmap-area");
5609 staticpro (&Qleft_bitmap_area
);
5610 Qright_bitmap_area
= intern ("right-bitmap-area");
5611 staticpro (&Qright_bitmap_area
);
5613 Qwindow_size_fixed
= intern ("window-size-fixed");
5614 staticpro (&Qwindow_size_fixed
);
5616 staticpro (&Qwindow_configuration_change_hook
);
5617 Qwindow_configuration_change_hook
5618 = intern ("window-configuration-change-hook");
5620 Qwindowp
= intern ("windowp");
5621 staticpro (&Qwindowp
);
5623 Qwindow_configuration_p
= intern ("window-configuration-p");
5624 staticpro (&Qwindow_configuration_p
);
5626 Qwindow_live_p
= intern ("window-live-p");
5627 staticpro (&Qwindow_live_p
);
5629 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
5630 staticpro (&Qtemp_buffer_show_hook
);
5632 staticpro (&Vwindow_list
);
5634 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
5635 "Non-nil means call as function to display a help buffer.\n\
5636 The function is called with one argument, the buffer to be displayed.\n\
5637 Used by `with-output-to-temp-buffer'.\n\
5638 If this function is used, then it must do the entire job of showing\n\
5639 the buffer; `temp-buffer-show-hook' is not run unless this function runs it.");
5640 Vtemp_buffer_show_function
= Qnil
;
5642 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
5643 "If non-nil, function to call to handle `display-buffer'.\n\
5644 It will receive two args, the buffer and a flag which if non-nil means\n\
5645 that the currently selected window is not acceptable.\n\
5646 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
5647 work using this function.");
5648 Vdisplay_buffer_function
= Qnil
;
5650 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
5651 "*If non-nil, `display-buffer' should even the window heights.\n\
5652 If nil, `display-buffer' will leave the window configuration alone.");
5653 Veven_window_heights
= Qt
;
5655 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
5656 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
5657 Vminibuf_scroll_window
= Qnil
;
5659 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
5660 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
5661 Vother_window_scroll_buffer
= Qnil
;
5663 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
5664 "*Non-nil means `display-buffer' should make a separate frame.");
5667 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
5668 "*Non-nil means `display-buffer' should reuse frames.\n\
5669 If the buffer in question is already displayed in a frame, raise that frame.");
5670 display_buffer_reuse_frames
= 0;
5672 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
5673 "Function to call to handle automatic new frame creation.\n\
5674 It is called with no arguments and should return a newly created frame.\n\
5676 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
5677 where `pop-up-frame-alist' would hold the default frame parameters.");
5678 Vpop_up_frame_function
= Qnil
;
5680 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
5681 "*List of buffer names that should have their own special frames.\n\
5682 Displaying a buffer whose name is in this list makes a special frame for it\n\
5683 using `special-display-function'. See also `special-display-regexps'.\n\
5685 An element of the list can be a list instead of just a string.\n\
5686 There are two ways to use a list as an element:\n\
5687 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\
5688 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5689 In the latter case, FUNCTION is called with BUFFER as the first argument,\n\
5690 followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\
5691 All this is done by the function found in `special-display-function'.\n\
5693 If this variable appears \"not to work\", because you add a name to it\n\
5694 but that buffer still appears in the selected window, look at the\n\
5695 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5696 Those variables take precedence over this one.");
5697 Vspecial_display_buffer_names
= Qnil
;
5699 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
5700 "*List of regexps saying which buffers should have their own special frames.\n\
5701 If a buffer name matches one of these regexps, it gets its own frame.\n\
5702 Displaying a buffer whose name is in this list makes a special frame for it\n\
5703 using `special-display-function'.\n\
5705 An element of the list can be a list instead of just a string.\n\
5706 There are two ways to use a list as an element:\n\
5707 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\
5708 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5709 In the latter case, FUNCTION is called with the buffer as first argument,\n\
5710 followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\
5711 All this is done by the function found in `special-display-function'.\n\
5713 If this variable appears \"not to work\", because you add a regexp to it\n\
5714 but the matching buffers still appear in the selected window, look at the\n\
5715 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5716 Those variables take precedence over this one.");
5717 Vspecial_display_regexps
= Qnil
;
5719 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
5720 "Function to call to make a new frame for a special buffer.\n\
5721 It is called with two arguments, the buffer and optional buffer specific\n\
5722 data, and should return a window displaying that buffer.\n\
5723 The default value makes a separate frame for the buffer,\n\
5724 using `special-display-frame-alist' to specify the frame parameters.\n\
5726 A buffer is special if its is listed in `special-display-buffer-names'\n\
5727 or matches a regexp in `special-display-regexps'.");
5728 Vspecial_display_function
= Qnil
;
5730 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
5731 "*List of buffer names that should appear in the selected window.\n\
5732 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\
5733 switches to it in the selected window, rather than making it appear\n\
5734 in some other window.\n\
5736 An element of the list can be a cons cell instead of just a string.\n\
5737 Then the car must be a string, which specifies the buffer name.\n\
5738 This is for compatibility with `special-display-buffer-names';\n\
5739 the cdr of the cons cell is ignored.\n\
5741 See also `same-window-regexps'.");
5742 Vsame_window_buffer_names
= Qnil
;
5744 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
5745 "*List of regexps saying which buffers should appear in the selected window.\n\
5746 If a buffer name matches one of these regexps, then displaying it\n\
5747 using `display-buffer' or `pop-to-buffer' switches to it\n\
5748 in the selected window, rather than making it appear in some other window.\n\
5750 An element of the list can be a cons cell instead of just a string.\n\
5751 Then the car must be a string, which specifies the buffer name.\n\
5752 This is for compatibility with `special-display-buffer-names';\n\
5753 the cdr of the cons cell is ignored.\n\
5755 See also `same-window-buffer-names'.");
5756 Vsame_window_regexps
= Qnil
;
5758 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
5759 "*Non-nil means display-buffer should make new windows.");
5762 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
5763 "*Number of lines of continuity when scrolling by screenfuls.");
5764 next_screen_context_lines
= 2;
5766 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
5767 "*display-buffer would prefer to split the largest window if this large.\n\
5768 If there is only one window, it is split regardless of this value.");
5769 split_height_threshold
= 500;
5771 DEFVAR_INT ("window-min-height", &window_min_height
,
5772 "*Delete any window less than this tall (including its mode line).");
5773 window_min_height
= 4;
5775 DEFVAR_INT ("window-min-width", &window_min_width
,
5776 "*Delete any window less than this wide.");
5777 window_min_width
= 10;
5779 DEFVAR_LISP ("scroll-preserve-screen-position",
5780 &Vscroll_preserve_screen_position
,
5781 "*Nonzero means scroll commands move point to keep its screen line unchanged.");
5782 Vscroll_preserve_screen_position
= Qnil
;
5784 DEFVAR_LISP ("window-configuration-change-hook",
5785 &Vwindow_configuration_change_hook
,
5786 "Functions to call when window configuration changes.\n\
5787 The selected frame is the one whose configuration has changed.");
5788 Vwindow_configuration_change_hook
= Qnil
;
5790 defsubr (&Sselected_window
);
5791 defsubr (&Sminibuffer_window
);
5792 defsubr (&Swindow_minibuffer_p
);
5793 defsubr (&Swindowp
);
5794 defsubr (&Swindow_live_p
);
5795 defsubr (&Spos_visible_in_window_p
);
5796 defsubr (&Swindow_buffer
);
5797 defsubr (&Swindow_height
);
5798 defsubr (&Swindow_width
);
5799 defsubr (&Swindow_hscroll
);
5800 defsubr (&Sset_window_hscroll
);
5801 defsubr (&Swindow_redisplay_end_trigger
);
5802 defsubr (&Sset_window_redisplay_end_trigger
);
5803 defsubr (&Swindow_edges
);
5804 defsubr (&Scoordinates_in_window_p
);
5805 defsubr (&Swindow_at
);
5806 defsubr (&Swindow_point
);
5807 defsubr (&Swindow_start
);
5808 defsubr (&Swindow_end
);
5809 defsubr (&Sset_window_point
);
5810 defsubr (&Sset_window_start
);
5811 defsubr (&Swindow_dedicated_p
);
5812 defsubr (&Sset_window_dedicated_p
);
5813 defsubr (&Swindow_display_table
);
5814 defsubr (&Sset_window_display_table
);
5815 defsubr (&Snext_window
);
5816 defsubr (&Sprevious_window
);
5817 defsubr (&Sother_window
);
5818 defsubr (&Sget_lru_window
);
5819 defsubr (&Sget_largest_window
);
5820 defsubr (&Sget_buffer_window
);
5821 defsubr (&Sdelete_other_windows
);
5822 defsubr (&Sdelete_windows_on
);
5823 defsubr (&Sreplace_buffer_in_windows
);
5824 defsubr (&Sdelete_window
);
5825 defsubr (&Sset_window_buffer
);
5826 defsubr (&Sselect_window
);
5827 defsubr (&Sspecial_display_p
);
5828 defsubr (&Ssame_window_p
);
5829 defsubr (&Sdisplay_buffer
);
5830 defsubr (&Ssplit_window
);
5831 defsubr (&Senlarge_window
);
5832 defsubr (&Sshrink_window
);
5833 defsubr (&Sscroll_up
);
5834 defsubr (&Sscroll_down
);
5835 defsubr (&Sscroll_left
);
5836 defsubr (&Sscroll_right
);
5837 defsubr (&Sother_window_for_scrolling
);
5838 defsubr (&Sscroll_other_window
);
5839 defsubr (&Srecenter
);
5840 defsubr (&Swindow_text_height
);
5841 defsubr (&Smove_to_window_line
);
5842 defsubr (&Swindow_configuration_p
);
5843 defsubr (&Swindow_configuration_frame
);
5844 defsubr (&Sset_window_configuration
);
5845 defsubr (&Scurrent_window_configuration
);
5846 defsubr (&Ssave_window_excursion
);
5847 defsubr (&Sset_window_margins
);
5848 defsubr (&Swindow_margins
);
5849 defsubr (&Swindow_vscroll
);
5850 defsubr (&Sset_window_vscroll
);
5851 defsubr (&Scompare_window_configurations
);
5852 defsubr (&Swindow_list
);
5858 initial_define_key (control_x_map
, '1', "delete-other-windows");
5859 initial_define_key (control_x_map
, '2', "split-window");
5860 initial_define_key (control_x_map
, '0', "delete-window");
5861 initial_define_key (control_x_map
, 'o', "other-window");
5862 initial_define_key (control_x_map
, '^', "enlarge-window");
5863 initial_define_key (control_x_map
, '<', "scroll-left");
5864 initial_define_key (control_x_map
, '>', "scroll-right");
5866 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
5867 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
5868 initial_define_key (meta_map
, 'v', "scroll-down");
5870 initial_define_key (global_map
, Ctl('L'), "recenter");
5871 initial_define_key (meta_map
, 'r', "move-to-window-line");