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 p
->orig_top
= p
->orig_height
= Qnil
;
248 p
->start
= Fmake_marker ();
249 p
->pointm
= Fmake_marker ();
250 XSETFASTINT (p
->use_time
, 0);
252 p
->display_table
= Qnil
;
254 p
->pseudo_window_p
= 0;
255 bzero (&p
->cursor
, sizeof (p
->cursor
));
256 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
257 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
258 p
->desired_matrix
= p
->current_matrix
= 0;
259 p
->phys_cursor_type
= -1;
260 p
->must_be_updated_p
= 0;
261 XSETFASTINT (p
->window_end_vpos
, 0);
262 XSETFASTINT (p
->window_end_pos
, 0);
263 p
->window_end_valid
= Qnil
;
266 XSETFASTINT (p
->last_point
, 0);
267 p
->frozen_window_start_p
= 0;
273 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
274 "Return the window that the cursor now appears in and commands apply to.")
277 return selected_window
;
280 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
281 "Return the window used now for minibuffers.\n\
282 If the optional argument FRAME is specified, return the minibuffer window\n\
283 used by that frame.")
288 frame
= selected_frame
;
289 CHECK_LIVE_FRAME (frame
, 0);
290 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
293 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
294 "Returns non-nil if WINDOW is a minibuffer window.")
298 struct window
*w
= decode_window (window
);
299 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
303 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
304 Spos_visible_in_window_p
, 0, 3, 0,
305 "Return t if position POS is currently on the frame in WINDOW.\n\
306 Return nil if that position is scrolled vertically out of view.\n\
307 If a character is only partially visible, nil is returned, unless the\n\
308 optional argument PARTIALLY is non-nil.\n\
309 POS defaults to point in WINDOW; WINDOW defaults to the selected window.")
310 (pos
, window
, partially
)
311 Lisp_Object pos
, window
, partially
;
313 register struct window
*w
;
315 register struct buffer
*buf
;
317 Lisp_Object in_window
;
320 w
= decode_window (window
);
321 buf
= XBUFFER (w
->buffer
);
322 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
326 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
329 else if (w
== XWINDOW (selected_window
))
332 posint
= XMARKER (w
->pointm
)->charpos
;
334 /* If position is above window start, it's not visible. */
335 if (posint
< CHARPOS (top
))
337 else if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
)
338 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (buf
)
339 && posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
))
341 /* If frame is up-to-date, and POSINT is < window end pos, use
342 that info. This doesn't work for POSINT == end pos, because
343 the window end pos is actually the position _after_ the last
344 char in the window. */
345 if (NILP (partially
))
347 pos_visible_p (w
, posint
, &fully_p
, NILP (partially
));
348 in_window
= fully_p
? Qt
: Qnil
;
353 else if (posint
> BUF_ZV (buf
))
355 else if (CHARPOS (top
) < BUF_BEGV (buf
) || CHARPOS (top
) > BUF_ZV (buf
))
356 /* If window start is out of range, do something reasonable. */
360 if (pos_visible_p (w
, posint
, &fully_p
, NILP (partially
)))
361 in_window
= !NILP (partially
) || fully_p
? Qt
: Qnil
;
370 static struct window
*
371 decode_window (window
)
372 register Lisp_Object window
;
375 return XWINDOW (selected_window
);
377 CHECK_LIVE_WINDOW (window
, 0);
378 return XWINDOW (window
);
381 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
382 "Return the buffer that WINDOW is displaying.")
386 return decode_window (window
)->buffer
;
389 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
390 "Return the number of lines in WINDOW (including its mode line).")
394 return decode_window (window
)->height
;
397 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
398 "Return the number of display columns in WINDOW.\n\
399 This is the width that is usable columns available for text in WINDOW.\n\
400 If you want to find out how many columns WINDOW takes up,\n\
401 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))).")
405 return make_number (window_internal_width (decode_window (window
)));
408 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
409 "Return the number of columns by which WINDOW is scrolled from left margin.")
413 return decode_window (window
)->hscroll
;
416 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
417 "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\
418 NCOL should be zero or positive.")
420 register Lisp_Object window
, ncol
;
422 register struct window
*w
;
424 CHECK_NUMBER (ncol
, 1);
425 if (XINT (ncol
) < 0) XSETFASTINT (ncol
, 0);
426 w
= decode_window (window
);
427 if (XINT (w
->hscroll
) != XINT (ncol
))
428 /* Prevent redisplay shortcuts */
429 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
434 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
435 Swindow_redisplay_end_trigger
, 0, 1, 0,
436 "Return WINDOW's redisplay end trigger value.\n\
437 See `set-window-redisplay-end-trigger' for more information.")
441 return decode_window (window
)->redisplay_end_trigger
;
444 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
445 Sset_window_redisplay_end_trigger
, 2, 2, 0,
446 "Set WINDOW's redisplay end trigger value to VALUE.\n\
447 VALUE should be a buffer position (typically a marker) or nil.\n\
448 If it is a buffer position, then if redisplay in WINDOW reaches a position\n\
449 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called\n\
450 with two arguments: WINDOW, and the end trigger value.\n\
451 Afterwards the end-trigger value is reset to nil.")
453 register Lisp_Object window
, value
;
455 register struct window
*w
;
457 w
= decode_window (window
);
458 w
->redisplay_end_trigger
= value
;
462 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
463 "Return a list of the edge coordinates of WINDOW.\n\
464 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\
465 RIGHT is one more than the rightmost column used by WINDOW,\n\
466 and BOTTOM is one more than the bottommost row used by WINDOW\n\
471 register struct window
*w
= decode_window (window
);
473 return Fcons (w
->left
, Fcons (w
->top
,
474 Fcons (make_number (WINDOW_RIGHT_EDGE (w
)),
475 Fcons (make_number (XFASTINT (w
->top
)
476 + XFASTINT (w
->height
)),
480 /* Test if the character at column *X, row *Y is within window W.
481 If it is not, return 0;
482 if it is in the window's text area,
483 set *x and *y to its location relative to the upper left corner
486 if it is on the window's modeline, return 2;
487 if it is on the border between the window and its right sibling,
489 if it is on the window's top line, return 4;
490 if it is in the bitmap area to the left/right of the window,
491 return 5 or 6, and convert *X and *Y to window-relative corrdinates.
493 X and Y are frame relative pixel coordinates. */
496 coordinates_in_window (w
, x
, y
)
497 register struct window
*w
;
500 /* Let's make this a global enum later, instead of using numbers
502 enum {ON_NOTHING
, ON_TEXT
, ON_MODE_LINE
, ON_VERTICAL_BORDER
,
503 ON_HEADER_LINE
, ON_LEFT_FRINGE
, ON_RIGHT_FRINGE
};
505 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
506 int left_x
, right_x
, top_y
, bottom_y
;
507 int flags_area_width
= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
509 int ux
= CANON_X_UNIT (f
), uy
= CANON_Y_UNIT (f
);
510 int x0
= XFASTINT (w
->left
) * ux
;
511 int x1
= x0
+ XFASTINT (w
->width
) * ux
;
513 if (*x
< x0
|| *x
>= x1
)
516 /* In what's below, we subtract 1 when computing right_x because we
517 want the rightmost pixel, which is given by left_pixel+width-1. */
518 if (w
->pseudo_window_p
)
521 right_x
= XFASTINT (w
->width
) * CANON_X_UNIT (f
) - 1;
522 top_y
= WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
);
523 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
527 left_x
= (WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X (w
)
528 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
529 right_x
= WINDOW_DISPLAY_RIGHT_EDGE_PIXEL_X (w
) - 1;
530 top_y
= (WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
)
531 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
532 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
535 /* On the mode line or header line? If it's near the start of
536 the mode or header line of window that's has a horizontal
537 sibling, say it's on the vertical line. That's to be able
538 to resize windows horizontally in case we're using toolkit
541 if (WINDOW_WANTS_MODELINE_P (w
)
542 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
)
545 /* We're somewhere on the mode line. We consider the place
546 between mode lines of horizontally adjacent mode lines
547 as the vertical border. If scroll bars on the left,
548 return the right window. */
551 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
553 if (abs (*x
- x0
) < ux
/ 2)
554 part
= ON_VERTICAL_BORDER
;
556 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < ux
/ 2)
557 part
= ON_VERTICAL_BORDER
;
559 else if (WINDOW_WANTS_HEADER_LINE_P (w
)
560 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
)
563 part
= ON_HEADER_LINE
;
565 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
567 if (abs (*x
- x0
) < ux
/ 2)
568 part
= ON_VERTICAL_BORDER
;
570 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < ux
/ 2)
571 part
= ON_VERTICAL_BORDER
;
573 /* Outside anything interesting? */
578 - FRAME_LEFT_SCROLL_BAR_WIDTH (f
) * ux
)
579 || *x
> right_x
+ flags_area_width
)
583 else if (FRAME_WINDOW_P (f
))
585 if (!w
->pseudo_window_p
586 && !FRAME_HAS_VERTICAL_SCROLL_BARS (f
)
587 && !WINDOW_RIGHTMOST_P (w
)
588 && (abs (*x
- right_x
- flags_area_width
) < ux
/ 2))
590 part
= ON_VERTICAL_BORDER
;
592 else if (*x
< left_x
|| *x
> right_x
)
594 /* Other lines than the mode line don't include flags areas and
595 scroll bars on the left. */
597 /* Convert X and Y to window-relative pixel coordinates. */
600 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
611 /* Need to say "*x > right_x" rather than >=, since on character
612 terminals, the vertical line's x coordinate is right_x. */
613 if (*x
< left_x
|| *x
> right_x
)
615 /* Other lines than the mode line don't include flags areas and
616 scroll bars on the left. */
618 /* Convert X and Y to window-relative pixel coordinates. */
621 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
623 /* Here, too, "*x > right_x" is because of character terminals. */
624 else if (!w
->pseudo_window_p
625 && !WINDOW_RIGHTMOST_P (w
)
626 && *x
> right_x
- ux
)
628 /* On the border on the right side of the window? Assume that
629 this area begins at RIGHT_X minus a canonical char width. */
630 part
= ON_VERTICAL_BORDER
;
634 /* Convert X and Y to window-relative pixel coordinates. */
645 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
646 Scoordinates_in_window_p
, 2, 2, 0,
647 "Return non-nil if COORDINATES are in WINDOW.\n\
648 COORDINATES is a cons of the form (X . Y), X and Y being distances\n\
649 measured in characters from the upper-left corner of the frame.\n\
650 (0 . 0) denotes the character in the upper left corner of the\n\
652 If COORDINATES are in the text portion of WINDOW,\n\
653 the coordinates relative to the window are returned.\n\
654 If they are in the mode line of WINDOW, `mode-line' is returned.\n\
655 If they are in the top mode line of WINDOW, `header-line' is returned.\n\
656 If they are in the bitmap-area to the left of the window,\n\
657 `left-bitmap-area' is returned, if they are in the area on the right of\n\
658 the window, `right-bitmap-area' is returned.\n\
659 If they are on the border between WINDOW and its right sibling,\n\
660 `vertical-line' is returned.")
661 (coordinates
, window
)
662 register Lisp_Object coordinates
, window
;
669 CHECK_LIVE_WINDOW (window
, 0);
670 w
= XWINDOW (window
);
671 f
= XFRAME (w
->frame
);
672 CHECK_CONS (coordinates
, 1);
673 lx
= Fcar (coordinates
);
674 ly
= Fcdr (coordinates
);
675 CHECK_NUMBER_OR_FLOAT (lx
, 1);
676 CHECK_NUMBER_OR_FLOAT (ly
, 1);
677 x
= PIXEL_X_FROM_CANON_X (f
, lx
);
678 y
= PIXEL_Y_FROM_CANON_Y (f
, ly
);
680 switch (coordinates_in_window (w
, &x
, &y
))
682 case 0: /* NOT in window at all. */
685 case 1: /* In text part of window. */
686 /* X and Y are now window relative pixel coordinates.
687 Convert them to canonical char units before returning
689 return Fcons (CANON_X_FROM_PIXEL_X (f
, x
),
690 CANON_Y_FROM_PIXEL_Y (f
, y
));
692 case 2: /* In mode line of window. */
695 case 3: /* On right border of window. */
696 return Qvertical_line
;
702 return Qleft_bitmap_area
;
705 return Qright_bitmap_area
;
713 /* Callback for foreach_window, used in window_from_coordinates.
714 Check if window W contains coordinates specified by USER_DATA which
715 is actually a pointer to a struct check_window_data CW.
717 Check if window W contains coordinates *CW->x and *CW->y. If it
718 does, return W in *CW->window, as Lisp_Object, and return in
719 *CW->part the part of the window under coordinates *X,*Y. Return
720 zero from this function to stop iterating over windows. */
722 struct check_window_data
729 check_window_containing (w
, user_data
)
733 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
736 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
739 *cw
->part
= found
- 1;
740 XSETWINDOW (*cw
->window
, w
);
747 /* Find the window containing frame-relative pixel position X/Y and
748 return it as a Lisp_Object. If X, Y is on the window's modeline,
749 set *PART to 1; if it is on the separating line between the window
750 and its right sibling, set it to 2; otherwise set it to 0. If
751 there is no window under X, Y return nil and leave *PART
752 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
754 This function was previously implemented with a loop cycling over
755 windows with Fnext_window, and starting with the frame's selected
756 window. It turned out that this doesn't work with an
757 implementation of next_window using Vwindow_list, because
758 FRAME_SELECTED_WINDOW (F) is not always contained in the window
759 tree of F when this function is called asynchronously from
760 note_mouse_highlight. The original loop didn't terminate in this
764 window_from_coordinates (f
, x
, y
, part
, tool_bar_p
)
771 struct check_window_data cw
;
774 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
775 foreach_window (f
, check_window_containing
, &cw
);
777 /* If not found above, see if it's in the tool bar window, if a tool
781 && WINDOWP (f
->tool_bar_window
)
782 && XINT (XWINDOW (f
->tool_bar_window
)->height
) > 0
783 && coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
))
786 window
= f
->tool_bar_window
;
792 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
793 "Return window containing coordinates X and Y on FRAME.\n\
794 If omitted, FRAME defaults to the currently selected frame.\n\
795 The top left corner of the frame is considered to be row 0,\n\
798 Lisp_Object x
, y
, frame
;
804 frame
= selected_frame
;
805 CHECK_LIVE_FRAME (frame
, 2);
808 /* Check that arguments are integers or floats. */
809 CHECK_NUMBER_OR_FLOAT (x
, 0);
810 CHECK_NUMBER_OR_FLOAT (y
, 1);
812 return window_from_coordinates (f
,
813 PIXEL_X_FROM_CANON_X (f
, x
),
814 PIXEL_Y_FROM_CANON_Y (f
, y
),
818 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
819 "Return current value of point in WINDOW.\n\
820 For a nonselected window, this is the value point would have\n\
821 if that window were selected.\n\
823 Note that, when WINDOW is the selected window and its buffer\n\
824 is also currently selected, the value returned is the same as (point).\n\
825 It would be more strictly correct to return the `top-level' value\n\
826 of point, outside of any save-excursion forms.\n\
827 But that is hard to define.")
831 register struct window
*w
= decode_window (window
);
833 if (w
== XWINDOW (selected_window
)
834 && current_buffer
== XBUFFER (w
->buffer
))
836 return Fmarker_position (w
->pointm
);
839 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
840 "Return position at which display currently starts in WINDOW.\n\
841 This is updated by redisplay or by calling `set-window-start'.")
845 return Fmarker_position (decode_window (window
)->start
);
848 /* This is text temporarily removed from the doc string below.
850 This function returns nil if the position is not currently known.\n\
851 That happens when redisplay is preempted and doesn't finish.\n\
852 If in that case you want to compute where the end of the window would\n\
853 have been if redisplay had finished, do this:\n\
855 (goto-char (window-start window))\n\
856 (vertical-motion (1- (window-height window)) window)\n\
859 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
860 "Return position at which display currently ends in WINDOW.\n\
861 This is updated by redisplay, when it runs to completion.\n\
862 Simply changing the buffer text or setting `window-start'\n\
863 does not update this value.\n\
864 If UP-TO-DATE is non-nil, compute the up-to-date position\n\
865 if it isn't already recorded.")
867 Lisp_Object window
, update
;
870 struct window
*w
= decode_window (window
);
874 CHECK_BUFFER (buf
, 0);
876 #if 0 /* This change broke some things. We should make it later. */
877 /* If we don't know the end position, return nil.
878 The user can compute it with vertical-motion if he wants to.
879 It would be nicer to do it automatically,
880 but that's so slow that it would probably bother people. */
881 if (NILP (w
->window_end_valid
))
886 && ! (! NILP (w
->window_end_valid
)
887 && XFASTINT (w
->last_modified
) >= MODIFF
))
889 struct text_pos startp
;
892 /* In case W->start is out of the range, use something
893 reasonable. This situation occured when loading a file with
894 `-l' containing a call to `rmail' with subsequent other
895 commands. At the end, W->start happened to be BEG, while
896 rmail had already narrowed the buffer. */
897 if (XMARKER (w
->start
)->charpos
< BEGV
)
898 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
899 else if (XMARKER (w
->start
)->charpos
> ZV
)
900 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
902 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
904 /* Cannot use Fvertical_motion because that function doesn't
905 cope with variable-height lines. */
906 start_display (&it
, w
, startp
);
907 move_it_vertically (&it
, window_box_height (w
));
908 value
= make_number (IT_CHARPOS (it
));
911 XSETINT (value
, BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
916 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
917 "Make point value in WINDOW be at position POS in WINDOW's buffer.")
919 Lisp_Object window
, pos
;
921 register struct window
*w
= decode_window (window
);
923 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
924 if (w
== XWINDOW (selected_window
)
925 && XBUFFER (w
->buffer
) == current_buffer
)
928 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
930 /* We have to make sure that redisplay updates the window to show
931 the new value of point. */
932 if (!EQ (window
, selected_window
))
933 ++windows_or_buffers_changed
;
938 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
939 "Make display in WINDOW start at position POS in WINDOW's buffer.\n\
940 Optional third arg NOFORCE non-nil inhibits next redisplay\n\
941 from overriding motion of point in order to display at this exact start.")
942 (window
, pos
, noforce
)
943 Lisp_Object window
, pos
, noforce
;
945 register struct window
*w
= decode_window (window
);
947 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
948 set_marker_restricted (w
->start
, pos
, w
->buffer
);
949 /* this is not right, but much easier than doing what is right. */
950 w
->start_at_line_beg
= Qnil
;
953 w
->update_mode_line
= Qt
;
954 XSETFASTINT (w
->last_modified
, 0);
955 XSETFASTINT (w
->last_overlay_modified
, 0);
956 if (!EQ (window
, selected_window
))
957 windows_or_buffers_changed
++;
962 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
964 "Return WINDOW's dedicated object, usually t or nil.\n\
965 See also `set-window-dedicated-p'.")
969 return decode_window (window
)->dedicated
;
972 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
973 Sset_window_dedicated_p
, 2, 2, 0,
974 "Control whether WINDOW is dedicated to the buffer it displays.\n\
975 If it is dedicated, Emacs will not automatically change\n\
976 which buffer appears in it.\n\
977 The second argument is the new value for the dedication flag;\n\
980 Lisp_Object window
, arg
;
982 register struct window
*w
= decode_window (window
);
992 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
994 "Return the display-table that WINDOW is using.")
998 return decode_window (window
)->display_table
;
1001 /* Get the display table for use on window W. This is either W's
1002 display table or W's buffer's display table. Ignore the specified
1003 tables if they are not valid; if no valid table is specified,
1006 struct Lisp_Char_Table
*
1007 window_display_table (w
)
1010 struct Lisp_Char_Table
*dp
= NULL
;
1012 if (DISP_TABLE_P (w
->display_table
))
1013 dp
= XCHAR_TABLE (w
->display_table
);
1014 else if (BUFFERP (w
->buffer
))
1016 struct buffer
*b
= XBUFFER (w
->buffer
);
1018 if (DISP_TABLE_P (b
->display_table
))
1019 dp
= XCHAR_TABLE (b
->display_table
);
1020 else if (DISP_TABLE_P (Vstandard_display_table
))
1021 dp
= XCHAR_TABLE (Vstandard_display_table
);
1027 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1028 "Set WINDOW's display-table to TABLE.")
1030 register Lisp_Object window
, table
;
1032 register struct window
*w
;
1034 w
= decode_window (window
);
1035 w
->display_table
= table
;
1039 /* Record info on buffer window w is displaying
1040 when it is about to cease to display that buffer. */
1043 register struct window
*w
;
1050 if (b
!= XMARKER (w
->pointm
)->buffer
)
1054 if (w
== XWINDOW (selected_window
)
1055 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1056 /* Do this except when the selected window's buffer
1057 is being removed from some other window. */
1059 /* last_window_start records the start position that this buffer
1060 had in the last window to be disconnected from it.
1061 Now that this statement is unconditional,
1062 it is possible for the buffer to be displayed in the
1063 selected window, while last_window_start reflects another
1064 window which was recently showing the same buffer.
1065 Some people might say that might be a good thing. Let's see. */
1066 b
->last_window_start
= marker_position (w
->start
);
1068 /* Point in the selected window's buffer
1069 is actually stored in that buffer, and the window's pointm isn't used.
1070 So don't clobber point in that buffer. */
1071 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1072 /* This line helps to fix Horsley's testbug.el bug. */
1073 && !(WINDOWP (b
->last_selected_window
)
1074 && w
!= XWINDOW (b
->last_selected_window
)
1075 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1076 temp_set_point_both (b
,
1077 clip_to_bounds (BUF_BEGV (b
),
1078 XMARKER (w
->pointm
)->charpos
,
1080 clip_to_bounds (BUF_BEGV_BYTE (b
),
1081 marker_byte_position (w
->pointm
),
1084 if (WINDOWP (b
->last_selected_window
)
1085 && w
== XWINDOW (b
->last_selected_window
))
1086 b
->last_selected_window
= Qnil
;
1089 /* Put replacement into the window structure in place of old. */
1091 replace_window (old
, replacement
)
1092 Lisp_Object old
, replacement
;
1094 register Lisp_Object tem
;
1095 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1097 /* If OLD is its frame's root_window, then replacement is the new
1098 root_window for that frame. */
1100 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1101 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1105 p
->width
= o
->width
;
1106 p
->height
= o
->height
;
1107 p
->desired_matrix
= p
->current_matrix
= 0;
1109 bzero (&p
->cursor
, sizeof (p
->cursor
));
1110 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1111 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1112 p
->phys_cursor_type
= -1;
1113 p
->must_be_updated_p
= 0;
1114 p
->pseudo_window_p
= 0;
1115 XSETFASTINT (p
->window_end_vpos
, 0);
1116 XSETFASTINT (p
->window_end_pos
, 0);
1117 p
->window_end_valid
= Qnil
;
1118 p
->frozen_window_start_p
= 0;
1119 p
->orig_top
= p
->orig_height
= Qnil
;
1121 p
->next
= tem
= o
->next
;
1123 XWINDOW (tem
)->prev
= replacement
;
1125 p
->prev
= tem
= o
->prev
;
1127 XWINDOW (tem
)->next
= replacement
;
1129 p
->parent
= tem
= o
->parent
;
1132 if (EQ (XWINDOW (tem
)->vchild
, old
))
1133 XWINDOW (tem
)->vchild
= replacement
;
1134 if (EQ (XWINDOW (tem
)->hchild
, old
))
1135 XWINDOW (tem
)->hchild
= replacement
;
1138 /*** Here, if replacement is a vertical combination
1139 and so is its new parent, we should make replacement's
1140 children be children of that parent instead. ***/
1143 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1144 "Remove WINDOW from the display. Default is selected window.")
1146 register Lisp_Object window
;
1148 delete_window (window
);
1150 if (! NILP (Vwindow_configuration_change_hook
)
1151 && ! NILP (Vrun_hooks
))
1152 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1158 delete_window (window
)
1159 register Lisp_Object window
;
1161 register Lisp_Object tem
, parent
, sib
;
1162 register struct window
*p
;
1163 register struct window
*par
;
1166 /* Because this function is called by other C code on non-leaf
1167 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1168 so we can't decode_window here. */
1170 window
= selected_window
;
1172 CHECK_WINDOW (window
, 0);
1173 p
= XWINDOW (window
);
1175 /* It's okay to delete an already-deleted window. */
1176 if (NILP (p
->buffer
)
1178 && NILP (p
->vchild
))
1183 error ("Attempt to delete minibuffer or sole ordinary window");
1184 par
= XWINDOW (parent
);
1186 windows_or_buffers_changed
++;
1187 Vwindow_list
= Qnil
;
1188 frame
= XFRAME (WINDOW_FRAME (p
));
1189 FRAME_WINDOW_SIZES_CHANGED (frame
) = 1;
1191 /* Are we trying to delete any frame's selected window? */
1193 Lisp_Object frame
, pwindow
;
1195 /* See if the frame's selected window is either WINDOW
1196 or any subwindow of it, by finding all that window's parents
1197 and comparing each one with WINDOW. */
1198 frame
= WINDOW_FRAME (XWINDOW (window
));
1199 pwindow
= FRAME_SELECTED_WINDOW (XFRAME (frame
));
1201 while (!NILP (pwindow
))
1203 if (EQ (window
, pwindow
))
1205 pwindow
= XWINDOW (pwindow
)->parent
;
1208 if (EQ (window
, pwindow
))
1210 Lisp_Object alternative
;
1211 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
1213 /* If we're about to delete the selected window on the
1214 selected frame, then we should use Fselect_window to select
1215 the new window. On the other hand, if we're about to
1216 delete the selected window on any other frame, we shouldn't do
1217 anything but set the frame's selected_window slot. */
1218 if (EQ (window
, selected_window
))
1219 Fselect_window (alternative
);
1221 FRAME_SELECTED_WINDOW (XFRAME (frame
)) = alternative
;
1226 /* tem is null for dummy parent windows
1227 (which have inferiors but not any contents themselves) */
1231 unchain_marker (p
->pointm
);
1232 unchain_marker (p
->start
);
1235 /* Free window glyph matrices. It is sure that they are allocated
1236 again when ADJUST_GLYPHS is called. Block input so that expose
1237 events and other events that access glyph matrices are not
1238 processed while we are changing them. */
1240 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (frame
)));
1244 XWINDOW (tem
)->prev
= p
->prev
;
1248 XWINDOW (tem
)->next
= p
->next
;
1250 if (EQ (window
, par
->hchild
))
1251 par
->hchild
= p
->next
;
1252 if (EQ (window
, par
->vchild
))
1253 par
->vchild
= p
->next
;
1255 /* Find one of our siblings to give our space to. */
1259 /* If p gives its space to its next sibling, that sibling needs
1260 to have its top/left side pulled back to where p's is.
1261 set_window_{height,width} will re-position the sibling's
1264 XWINDOW (sib
)->top
= p
->top
;
1265 XWINDOW (sib
)->left
= p
->left
;
1268 /* Stretch that sibling. */
1269 if (!NILP (par
->vchild
))
1270 set_window_height (sib
,
1271 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
1273 if (!NILP (par
->hchild
))
1274 set_window_width (sib
,
1275 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
1278 /* If parent now has only one child,
1279 put the child into the parent's place. */
1283 if (NILP (XWINDOW (tem
)->next
))
1284 replace_window (parent
, tem
);
1286 /* Since we may be deleting combination windows, we must make sure that
1287 not only p but all its children have been marked as deleted. */
1288 if (! NILP (p
->hchild
))
1289 delete_all_subwindows (XWINDOW (p
->hchild
));
1290 else if (! NILP (p
->vchild
))
1291 delete_all_subwindows (XWINDOW (p
->vchild
));
1293 /* Mark this window as deleted. */
1294 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1296 /* Adjust glyph matrices. */
1297 adjust_glyphs (frame
);
1303 /***********************************************************************
1305 ***********************************************************************/
1307 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1308 pointer. This is a callback function for foreach_window, used in
1309 function window_list. */
1312 add_window_to_list (w
, user_data
)
1316 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1318 XSETWINDOW (window
, w
);
1319 *list
= Fcons (window
, *list
);
1324 /* Return a list of all windows, for use by next_window. If
1325 Vwindow_list is a list, return that list. Otherwise, build a new
1326 list, cache it in Vwindow_list, and return that. */
1331 if (!CONSP (Vwindow_list
))
1335 Vwindow_list
= Qnil
;
1336 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1338 Lisp_Object args
[2];
1340 /* We are visiting windows in canonical order, and add
1341 new windows at the front of args[1], which means we
1342 have to reverse this list at the end. */
1344 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1345 args
[0] = Vwindow_list
;
1346 args
[1] = Fnreverse (args
[1]);
1347 Vwindow_list
= Fnconc (2, args
);
1351 return Vwindow_list
;
1355 /* Value is non-zero if WINDOW satisfies the constraints given by
1356 OWINDOW, MINIBUF and ALL_FRAMES.
1358 MINIBUF t means WINDOW may be minibuffer windows.
1359 `lambda' means WINDOW may not be a minibuffer window.
1360 a window means a specific minibuffer window
1362 ALL_FRAMES t means search all frames,
1363 nil means search just current frame,
1364 `visible' means search just visible frames,
1365 0 means search visible and iconified frames,
1366 a window means search the frame that window belongs to,
1367 a frame means consider windows on that frame, only. */
1370 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1371 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1373 struct window
*w
= XWINDOW (window
);
1374 struct frame
*f
= XFRAME (w
->frame
);
1375 int candidate_p
= 1;
1377 if (!BUFFERP (w
->buffer
))
1379 else if (MINI_WINDOW_P (w
)
1380 && (EQ (minibuf
, Qlambda
)
1381 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1383 /* If MINIBUF is `lambda' don't consider any mini-windows.
1384 If it is a window, consider only that one. */
1387 else if (EQ (all_frames
, Qt
))
1389 else if (NILP (all_frames
))
1391 xassert (WINDOWP (owindow
));
1392 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1394 else if (EQ (all_frames
, Qvisible
))
1396 FRAME_SAMPLE_VISIBILITY (f
);
1397 candidate_p
= FRAME_VISIBLE_P (f
);
1399 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1401 FRAME_SAMPLE_VISIBILITY (f
);
1402 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1404 else if (WINDOWP (all_frames
))
1405 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1406 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1407 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1408 else if (FRAMEP (all_frames
))
1409 candidate_p
= EQ (all_frames
, w
->frame
);
1415 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1416 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1420 decode_next_window_args (window
, minibuf
, all_frames
)
1421 Lisp_Object
*window
, *minibuf
, *all_frames
;
1424 *window
= selected_window
;
1426 CHECK_LIVE_WINDOW (*window
, 0);
1428 /* MINIBUF nil may or may not include minibuffers. Decide if it
1430 if (NILP (*minibuf
))
1431 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1432 else if (!EQ (*minibuf
, Qt
))
1435 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1436 => count none of them, or a specific minibuffer window (the
1437 active one) to count. */
1439 /* ALL_FRAMES nil doesn't specify which frames to include. */
1440 if (NILP (*all_frames
))
1441 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1442 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1444 else if (EQ (*all_frames
, Qvisible
))
1446 else if (XFASTINT (*all_frames
) == 0)
1448 else if (FRAMEP (*all_frames
))
1450 else if (!EQ (*all_frames
, Qt
))
1453 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1454 search just current frame, `visible' meaning search just visible
1455 frames, 0 meaning search visible and iconified frames, or a
1456 window, meaning search the frame that window belongs to, or a
1457 frame, meaning consider windows on that frame, only. */
1461 /* Return the next or previous window of WINDOW in canonical ordering
1462 of windows. NEXT_P non-zero means return the next window. See the
1463 documentation string of next-window for the meaning of MINIBUF and
1467 next_window (window
, minibuf
, all_frames
, next_p
)
1468 Lisp_Object window
, minibuf
, all_frames
;
1471 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1473 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1474 return the first window on the frame. */
1475 if (FRAMEP (all_frames
)
1476 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1477 return Fframe_first_window (all_frames
);
1483 /* Find WINDOW in the list of all windows. */
1484 list
= Fmemq (window
, window_list ());
1486 /* Scan forward from WINDOW to the end of the window list. */
1488 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1489 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1492 /* Scan from the start of the window list up to WINDOW. */
1494 for (list
= Vwindow_list
;
1495 CONSP (list
) && !EQ (XCAR (list
), window
);
1497 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1501 window
= XCAR (list
);
1505 Lisp_Object candidate
, list
;
1507 /* Scan through the list of windows for candidates. If there are
1508 candidate windows in front of WINDOW, the last one of these
1509 is the one we want. If there are candidates following WINDOW
1510 in the list, again the last one of these is the one we want. */
1512 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1514 if (EQ (XCAR (list
), window
))
1516 if (WINDOWP (candidate
))
1519 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1521 candidate
= XCAR (list
);
1524 if (WINDOWP (candidate
))
1532 /* This comment supplies the doc string for `next-window',
1533 for make-docfile to see. We cannot put this in the real DEFUN
1534 due to limits in the Unix cpp.
1536 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
1537 "Return next window after WINDOW in canonical ordering of windows.\n\
1538 If omitted, WINDOW defaults to the selected window.\n\
1540 Optional second arg MINIBUF t means count the minibuffer window even\n\
1541 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1542 it is active. MINIBUF neither t nor nil means not to count the\n\
1543 minibuffer even if it is active.\n\
1545 Several frames may share a single minibuffer; if the minibuffer\n\
1546 counts, all windows on all frames that share that minibuffer count\n\
1547 too. Therefore, `next-window' can be used to iterate through the\n\
1548 set of windows even when the minibuffer is on another frame. If the\n\
1549 minibuffer does not count, only windows from WINDOW's frame count.\n\
1551 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1552 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1553 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1554 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1555 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1556 Anything else means restrict to WINDOW's frame.\n\
1558 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1559 `next-window' to iterate through the entire cycle of acceptable\n\
1560 windows, eventually ending up back at the window you started with.\n\
1561 `previous-window' traverses the same cycle, in the reverse order.")
1562 (window, minibuf, all_frames) */
1564 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1566 (window
, minibuf
, all_frames
)
1567 Lisp_Object window
, minibuf
, all_frames
;
1569 return next_window (window
, minibuf
, all_frames
, 1);
1573 /* This comment supplies the doc string for `previous-window',
1574 for make-docfile to see. We cannot put this in the real DEFUN
1575 due to limits in the Unix cpp.
1577 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
1578 "Return the window preceding WINDOW in canonical ordering of windows.\n\
1579 If omitted, WINDOW defaults to the selected window.\n\
1581 Optional second arg MINIBUF t means count the minibuffer window even\n\
1582 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1583 it is active. MINIBUF neither t nor nil means not to count the\n\
1584 minibuffer even if it is active.\n\
1586 Several frames may share a single minibuffer; if the minibuffer\n\
1587 counts, all windows on all frames that share that minibuffer count\n\
1588 too. Therefore, `previous-window' can be used to iterate through\n\
1589 the set of windows even when the minibuffer is on another frame. If\n\
1590 the minibuffer does not count, only windows from WINDOW's frame count\n\
1592 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1593 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1594 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1595 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1596 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1597 Anything else means restrict to WINDOW's frame.\n\
1599 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1600 `previous-window' to iterate through the entire cycle of acceptable\n\
1601 windows, eventually ending up back at the window you started with.\n\
1602 `next-window' traverses the same cycle, in the reverse order.")
1603 (window, minibuf, all_frames) */
1606 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1608 (window
, minibuf
, all_frames
)
1609 Lisp_Object window
, minibuf
, all_frames
;
1611 return next_window (window
, minibuf
, all_frames
, 0);
1615 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1616 "Select the ARG'th different window on this frame.\n\
1617 All windows on current frame are arranged in a cyclic order.\n\
1618 This command selects the window ARG steps away in that order.\n\
1619 A negative ARG moves in the opposite order. If the optional second\n\
1620 argument ALL_FRAMES is non-nil, cycle through all frames.")
1622 Lisp_Object arg
, all_frames
;
1627 CHECK_NUMBER (arg
, 0);
1628 window
= selected_window
;
1630 for (i
= XINT (arg
); i
> 0; --i
)
1631 window
= Fnext_window (window
, Qnil
, all_frames
);
1633 window
= Fprevious_window (window
, Qnil
, all_frames
);
1635 Fselect_window (window
);
1640 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1641 "Return a list of windows on FRAME, starting with WINDOW.\n\
1642 FRAME nil or omitted means use the selected frame.\n\
1643 WINDOW nil or omitted means use the selected window.\n\
1644 MINIBUF t means include the minibuffer window, even if it isn't active.\n\
1645 MINIBUF nil or omitted means include the minibuffer window only\n\
1647 MINIBUF neither nil nor t means never include the minibuffer window.")
1648 (frame
, minibuf
, window
)
1649 Lisp_Object frame
, minibuf
, window
;
1653 window
= selected_window
;
1655 frame
= selected_frame
;
1657 if (!EQ (frame
, XWINDOW (window
)->frame
))
1658 error ("Window is on a different frame");
1660 return window_list_1 (window
, minibuf
, frame
);
1664 /* Return a list of windows in canonical ordering. Arguments are like
1665 for `next-window'. */
1668 window_list_1 (window
, minibuf
, all_frames
)
1669 Lisp_Object window
, minibuf
, all_frames
;
1671 Lisp_Object tail
, list
;
1673 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1676 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1677 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1678 list
= Fcons (XCAR (tail
), list
);
1680 return Fnreverse (list
);
1685 /* Look at all windows, performing an operation specified by TYPE
1687 If FRAMES is Qt, look at all frames;
1688 Qnil, look at just the selected frame;
1689 Qvisible, look at visible frames;
1690 a frame, just look at windows on that frame.
1691 If MINI is non-zero, perform the operation on minibuffer windows too.
1697 GET_BUFFER_WINDOW
, /* Arg is buffer */
1698 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1699 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1700 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1702 UNSHOW_BUFFER
, /* Arg is buffer */
1707 window_loop (type
, obj
, mini
, frames
)
1708 enum window_loop type
;
1709 Lisp_Object obj
, frames
;
1712 Lisp_Object window
, windows
, best_window
, frame_arg
;
1714 struct gcpro gcpro1
;
1716 /* If we're only looping through windows on a particular frame,
1717 frame points to that frame. If we're looping through windows
1718 on all frames, frame is 0. */
1719 if (FRAMEP (frames
))
1720 f
= XFRAME (frames
);
1721 else if (NILP (frames
))
1722 f
= SELECTED_FRAME ();
1727 frame_arg
= Qlambda
;
1728 else if (XFASTINT (frames
) == 0)
1730 else if (EQ (frames
, Qvisible
))
1735 /* frame_arg is Qlambda to stick to one frame,
1736 Qvisible to consider all visible frames,
1739 /* Pick a window to start with. */
1743 window
= FRAME_SELECTED_WINDOW (f
);
1745 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1747 /* Figure out the last window we're going to mess with. Since
1748 Fnext_window, given the same options, is guaranteed to go in a
1749 ring, we can just use Fprevious_window to find the last one.
1751 We can't just wait until we hit the first window again, because
1752 it might be deleted. */
1754 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1758 for (; CONSP (windows
); windows
= CDR (windows
))
1762 window
= XCAR (windows
);
1763 w
= XWINDOW (window
);
1765 /* Note that we do not pay attention here to whether the frame
1766 is visible, since Fwindow_list skips non-visible frames if
1767 that is desired, under the control of frame_arg. */
1768 if (!MINI_WINDOW_P (w
)
1769 /* For UNSHOW_BUFFER, we must always consider all windows. */
1770 || type
== UNSHOW_BUFFER
1771 || (mini
&& minibuf_level
> 0))
1774 case GET_BUFFER_WINDOW
:
1775 if (EQ (w
->buffer
, obj
)
1776 /* Don't find any minibuffer window
1777 except the one that is currently in use. */
1778 && (MINI_WINDOW_P (w
)
1779 ? EQ (window
, minibuf_window
)
1787 case GET_LRU_WINDOW
:
1788 /* t as arg means consider only full-width windows */
1789 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
1791 /* Ignore dedicated windows and minibuffers. */
1792 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1794 if (NILP (best_window
)
1795 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1796 > XFASTINT (w
->use_time
)))
1797 best_window
= window
;
1800 case DELETE_OTHER_WINDOWS
:
1801 if (!EQ (window
, obj
))
1802 Fdelete_window (window
);
1805 case DELETE_BUFFER_WINDOWS
:
1806 if (EQ (w
->buffer
, obj
))
1808 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
1810 /* If this window is dedicated, and in a frame of its own,
1812 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1813 && !NILP (w
->dedicated
)
1814 && other_visible_frames (f
))
1816 /* Skip the other windows on this frame.
1817 There might be one, the minibuffer! */
1818 while (CONSP (XCDR (windows
))
1819 && EQ (XWINDOW (XCAR (windows
))->frame
,
1820 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1821 windows
= XCDR (windows
);
1823 /* Now we can safely delete the frame. */
1824 Fdelete_frame (w
->frame
, Qnil
);
1826 else if (NILP (w
->parent
))
1828 /* If we're deleting the buffer displayed in the
1829 only window on the frame, find a new buffer to
1832 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1834 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1835 Fset_window_buffer (window
, buffer
);
1836 if (EQ (window
, selected_window
))
1837 Fset_buffer (w
->buffer
);
1840 Fdelete_window (window
);
1844 case GET_LARGEST_WINDOW
:
1846 /* Ignore dedicated windows and minibuffers. */
1847 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1850 if (NILP (best_window
))
1851 best_window
= window
;
1854 struct window
*b
= XWINDOW (best_window
);
1855 if (XFASTINT (w
->height
) * XFASTINT (w
->width
)
1856 > XFASTINT (b
->height
) * XFASTINT (b
->width
))
1857 best_window
= window
;
1863 if (EQ (w
->buffer
, obj
))
1866 struct frame
*f
= XFRAME (w
->frame
);
1868 /* Find another buffer to show in this window. */
1869 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1871 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1873 /* If this window is dedicated, and in a frame of its own,
1875 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1876 && !NILP (w
->dedicated
)
1877 && other_visible_frames (f
))
1879 /* Skip the other windows on this frame.
1880 There might be one, the minibuffer! */
1881 while (CONSP (XCDR (windows
))
1882 && EQ (XWINDOW (XCAR (windows
))->frame
,
1883 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1884 windows
= XCDR (windows
);
1886 /* Now we can safely delete the frame. */
1887 Fdelete_frame (w
->frame
, Qnil
);
1891 /* Otherwise show a different buffer in the window. */
1892 w
->dedicated
= Qnil
;
1893 Fset_window_buffer (window
, buffer
);
1894 if (EQ (window
, selected_window
))
1895 Fset_buffer (w
->buffer
);
1900 /* Check for a window that has a killed buffer. */
1901 case CHECK_ALL_WINDOWS
:
1902 if (! NILP (w
->buffer
)
1903 && NILP (XBUFFER (w
->buffer
)->name
))
1907 case WINDOW_LOOP_UNUSED
:
1916 /* Used for debugging. Abort if any window has a dead buffer. */
1919 check_all_windows ()
1921 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
1924 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1925 "Return the window least recently selected or used for display.\n\
1926 If optional argument FRAME is `visible', search all visible frames.\n\
1927 If FRAME is 0, search all visible and iconified frames.\n\
1928 If FRAME is t, search all frames.\n\
1929 If FRAME is nil, search only the selected frame.\n\
1930 If FRAME is a frame, search only that frame.")
1934 register Lisp_Object w
;
1935 /* First try for a window that is full-width */
1936 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1937 if (!NILP (w
) && !EQ (w
, selected_window
))
1939 /* If none of them, try the rest */
1940 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1943 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1944 "Return the largest window in area.\n\
1945 If optional argument FRAME is `visible', search all visible frames.\n\
1946 If FRAME is 0, search all visible and iconified frames.\n\
1947 If FRAME is t, search all frames.\n\
1948 If FRAME is nil, search only the selected frame.\n\
1949 If FRAME is a frame, search only that frame.")
1953 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1957 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1958 "Return a window currently displaying BUFFER, or nil if none.\n\
1959 If optional argument FRAME is `visible', search all visible frames.\n\
1960 If optional argument FRAME is 0, search all visible and iconified frames.\n\
1961 If FRAME is t, search all frames.\n\
1962 If FRAME is nil, search only the selected frame.\n\
1963 If FRAME is a frame, search only that frame.")
1965 Lisp_Object buffer
, frame
;
1967 buffer
= Fget_buffer (buffer
);
1968 if (BUFFERP (buffer
))
1969 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1974 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1976 "Make WINDOW (or the selected window) fill its frame.\n\
1977 Only the frame WINDOW is on is affected.\n\
1978 This function tries to reduce display jumps\n\
1979 by keeping the text previously visible in WINDOW\n\
1980 in the same place on the frame. Doing this depends on\n\
1981 the value of (window-start WINDOW), so if calling this function\n\
1982 in a program gives strange scrolling, make sure the window-start\n\
1983 value is reasonable when this function is called.")
1992 window
= selected_window
;
1994 CHECK_LIVE_WINDOW (window
, 0);
1996 w
= XWINDOW (window
);
1998 startpos
= marker_position (w
->start
);
1999 top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2001 if (MINI_WINDOW_P (w
) && top
> 0)
2002 error ("Can't expand minibuffer to full frame");
2004 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2006 /* Try to minimize scrolling, by setting the window start to the point
2007 will cause the text at the old window start to be at the same place
2008 on the frame. But don't try to do this if the window start is
2009 outside the visible portion (as might happen when the display is
2010 not current, due to typeahead). */
2011 if (startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2012 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2014 struct position pos
;
2015 struct buffer
*obuf
= current_buffer
;
2017 Fset_buffer (w
->buffer
);
2018 /* This computation used to temporarily move point, but that can
2019 have unwanted side effects due to text properties. */
2020 pos
= *vmotion (startpos
, -top
, w
);
2022 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2023 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2024 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2026 /* We need to do this, so that the window-scroll-functions
2028 w
->optional_new_start
= Qt
;
2030 set_buffer_internal (obuf
);
2036 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2037 1, 2, "bDelete windows on (buffer): ",
2038 "Delete all windows showing BUFFER.\n\
2039 Optional second argument FRAME controls which frames are affected.\n\
2040 If optional argument FRAME is `visible', search all visible frames.\n\
2041 If FRAME is 0, search all visible and iconified frames.\n\
2042 If FRAME is nil, search all frames.\n\
2043 If FRAME is t, search only the selected frame.\n\
2044 If FRAME is a frame, search only that frame.")
2046 Lisp_Object buffer
, frame
;
2048 /* FRAME uses t and nil to mean the opposite of what window_loop
2052 else if (EQ (frame
, Qt
))
2057 buffer
= Fget_buffer (buffer
);
2058 CHECK_BUFFER (buffer
, 0);
2059 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2065 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2066 Sreplace_buffer_in_windows
,
2067 1, 1, "bReplace buffer in windows: ",
2068 "Replace BUFFER with some other buffer in all windows showing it.")
2074 buffer
= Fget_buffer (buffer
);
2075 CHECK_BUFFER (buffer
, 0);
2076 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2081 /* Replace BUFFER with some other buffer in all windows
2082 of all frames, even those on other keyboards. */
2085 replace_buffer_in_all_windows (buffer
)
2089 Lisp_Object tail
, frame
;
2091 /* A single call to window_loop won't do the job
2092 because it only considers frames on the current keyboard.
2093 So loop manually over frames, and handle each one. */
2094 FOR_EACH_FRAME (tail
, frame
)
2095 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2097 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2101 /* Set the height of WINDOW and all its inferiors. */
2103 /* The smallest acceptable dimensions for a window. Anything smaller
2104 might crash Emacs. */
2106 #define MIN_SAFE_WINDOW_WIDTH (2)
2107 #define MIN_SAFE_WINDOW_HEIGHT (2)
2109 /* Make sure that window_min_height and window_min_width are
2110 not too small; if they are, set them to safe minima. */
2113 check_min_window_sizes ()
2115 /* Smaller values might permit a crash. */
2116 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2117 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2118 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2119 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2122 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2123 minimum allowable size. */
2126 check_frame_size (frame
, rows
, cols
)
2130 /* For height, we have to see:
2131 whether the frame has a minibuffer,
2132 whether it wants a mode line, and
2133 whether it has a menu bar. */
2135 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
2136 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
2137 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
2139 if (FRAME_TOP_MARGIN (frame
) > 0)
2140 min_height
+= FRAME_TOP_MARGIN (frame
);
2142 if (*rows
< min_height
)
2144 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2145 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2149 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2150 check if W's width can be changed, otherwise check W's height.
2151 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2152 siblings, too. If none of the siblings is resizable, WINDOW isn't
2156 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2158 int width_p
, check_siblings_p
;
2163 if (!NILP (w
->hchild
))
2165 c
= XWINDOW (w
->hchild
);
2169 /* A horiz. combination is fixed-width if all of if its
2171 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2172 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2173 fixed_p
= c
== NULL
;
2177 /* A horiz. combination is fixed-height if one of if its
2179 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2180 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2181 fixed_p
= c
!= NULL
;
2184 else if (!NILP (w
->vchild
))
2186 c
= XWINDOW (w
->vchild
);
2190 /* A vert. combination is fixed-width if one of if its
2192 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2193 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2194 fixed_p
= c
!= NULL
;
2198 /* A vert. combination is fixed-height if all of if its
2200 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2201 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2202 fixed_p
= c
== NULL
;
2205 else if (BUFFERP (w
->buffer
))
2207 if (w
->height_fixed_p
&& !width_p
)
2211 struct buffer
*old
= current_buffer
;
2214 current_buffer
= XBUFFER (w
->buffer
);
2215 val
= find_symbol_value (Qwindow_size_fixed
);
2216 current_buffer
= old
;
2219 if (!EQ (val
, Qunbound
))
2221 fixed_p
= !NILP (val
);
2224 && ((EQ (val
, Qheight
) && width_p
)
2225 || (EQ (val
, Qwidth
) && !width_p
)))
2230 /* Can't tell if this one is resizable without looking at
2231 siblings. If all siblings are fixed-size this one is too. */
2232 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2236 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2237 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2241 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2242 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2256 /* Return the minimum size of window W, not taking fixed-width windows
2257 into account. WIDTH_P non-zero means return the minimum width,
2258 otherwise return the minimum height. If W is a combination window,
2259 compute the minimum size from the minimum sizes of W's children. */
2262 window_min_size_1 (w
, width_p
)
2269 if (!NILP (w
->hchild
))
2271 c
= XWINDOW (w
->hchild
);
2276 /* The min width of a horizontal combination is
2277 the sum of the min widths of its children. */
2280 size
+= window_min_size_1 (c
, width_p
);
2281 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2286 /* The min height a horizontal combination equals
2287 the maximum of all min height of its children. */
2290 int min_size
= window_min_size_1 (c
, width_p
);
2291 size
= max (min_size
, size
);
2292 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2296 else if (!NILP (w
->vchild
))
2298 c
= XWINDOW (w
->vchild
);
2303 /* The min width of a vertical combination is
2304 the maximum of the min widths of its children. */
2307 int min_size
= window_min_size_1 (c
, width_p
);
2308 size
= max (min_size
, size
);
2309 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2314 /* The min height of a vertical combination equals
2315 the sum of the min height of its children. */
2318 size
+= window_min_size_1 (c
, width_p
);
2319 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2326 size
= window_min_width
;
2329 if (MINI_WINDOW_P (w
)
2330 || (!WINDOW_WANTS_MODELINE_P (w
)
2331 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2334 size
= window_min_height
;
2342 /* Return the minimum size of window W, taking fixed-size windows into
2343 account. WIDTH_P non-zero means return the minimum width,
2344 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2345 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2346 unless FIXED is null. */
2349 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2351 int width_p
, ignore_fixed_p
, *fixed
;
2358 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2364 size
= width_p
? XFASTINT (w
->width
) : XFASTINT (w
->height
);
2366 size
= window_min_size_1 (w
, width_p
);
2372 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2373 WINDOW's width. Resize WINDOW's children, if any, so that they
2374 keep their proportionate size relative to WINDOW. Propagate
2375 WINDOW's top or left edge position to children. Delete windows
2376 that become too small unless NODELETE_P is non-zero. */
2379 size_window (window
, size
, width_p
, nodelete_p
)
2381 int size
, width_p
, nodelete_p
;
2383 struct window
*w
= XWINDOW (window
);
2385 Lisp_Object child
, *forward
, *sideward
;
2386 int old_size
, min_size
;
2388 check_min_window_sizes ();
2389 size
= max (0, size
);
2391 /* If the window has been "too small" at one point,
2392 don't delete it for being "too small" in the future.
2393 Preserve it as long as that is at all possible. */
2396 old_size
= XINT (w
->width
);
2397 min_size
= window_min_width
;
2401 old_size
= XINT (w
->height
);
2402 min_size
= window_min_height
;
2405 if (old_size
< window_min_width
)
2406 w
->too_small_ok
= Qt
;
2408 /* Maybe delete WINDOW if it's too small. */
2409 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 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
2611 set_marker_restricted (w
->start
,
2612 make_number (b
->last_window_start
),
2614 w
->start_at_line_beg
= Qnil
;
2615 w
->force_start
= Qnil
;
2616 XSETFASTINT (w
->last_modified
, 0);
2617 XSETFASTINT (w
->last_overlay_modified
, 0);
2618 windows_or_buffers_changed
++;
2620 /* We must select BUFFER for running the window-scroll-functions.
2621 If WINDOW is selected, switch permanently.
2622 Otherwise, switch but go back to the ambient buffer afterward. */
2623 if (EQ (window
, selected_window
))
2624 Fset_buffer (buffer
);
2625 /* We can't check ! NILP (Vwindow_scroll_functions) here
2626 because that might itself be a local variable. */
2627 else if (window_initialized
)
2629 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
2630 Fset_buffer (buffer
);
2633 /* Set left and right marginal area width from buffer. */
2634 Fset_window_margins (window
, b
->left_margin_width
, b
->right_margin_width
);
2638 if (! NILP (Vwindow_scroll_functions
))
2639 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2640 Fmarker_position (w
->start
));
2642 if (! NILP (Vwindow_configuration_change_hook
)
2643 && ! NILP (Vrun_hooks
))
2644 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2647 unbind_to (count
, Qnil
);
2651 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
2652 "Make WINDOW display BUFFER as its contents.\n\
2653 BUFFER can be a buffer or buffer name.")
2655 register Lisp_Object window
, buffer
;
2657 register Lisp_Object tem
;
2658 register struct window
*w
= decode_window (window
);
2660 XSETWINDOW (window
, w
);
2661 buffer
= Fget_buffer (buffer
);
2662 CHECK_BUFFER (buffer
, 1);
2664 if (NILP (XBUFFER (buffer
)->name
))
2665 error ("Attempt to display deleted buffer");
2669 error ("Window is deleted");
2670 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
2671 is first being set up. */
2673 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
2674 error ("Window is dedicated to `%s'",
2675 XSTRING (XBUFFER (tem
)->name
)->data
);
2680 set_window_buffer (window
, buffer
, 1);
2684 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
2685 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
2686 If WINDOW is not already selected, also make WINDOW's buffer current.\n\
2687 Note that the main editor command loop\n\
2688 selects the buffer of the selected window before each command.")
2690 register Lisp_Object window
;
2692 return select_window_1 (window
, 1);
2695 /* Note that selected_window can be nil
2696 when this is called from Fset_window_configuration. */
2699 select_window_1 (window
, recordflag
)
2700 register Lisp_Object window
;
2703 register struct window
*w
;
2704 register struct window
*ow
;
2707 CHECK_LIVE_WINDOW (window
, 0);
2709 w
= XWINDOW (window
);
2711 if (NILP (w
->buffer
))
2712 error ("Trying to select deleted window or non-leaf window");
2714 XSETFASTINT (w
->use_time
, ++window_select_count
);
2715 if (EQ (window
, selected_window
))
2718 if (!NILP (selected_window
))
2720 ow
= XWINDOW (selected_window
);
2721 if (! NILP (ow
->buffer
))
2722 set_marker_both (ow
->pointm
, ow
->buffer
,
2723 BUF_PT (XBUFFER (ow
->buffer
)),
2724 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
2727 selected_window
= window
;
2728 sf
= SELECTED_FRAME ();
2729 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
2731 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
2732 /* Use this rather than Fhandle_switch_frame
2733 so that FRAME_FOCUS_FRAME is moved appropriately as we
2734 move around in the state where a minibuffer in a separate
2736 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
2739 sf
->selected_window
= window
;
2742 record_buffer (w
->buffer
);
2743 Fset_buffer (w
->buffer
);
2745 XBUFFER (w
->buffer
)->last_selected_window
= window
;
2747 /* Go to the point recorded in the window.
2748 This is important when the buffer is in more
2749 than one window. It also matters when
2750 redisplay_window has altered point after scrolling,
2751 because it makes the change only in the window. */
2753 register int new_point
= marker_position (w
->pointm
);
2754 if (new_point
< BEGV
)
2756 else if (new_point
> ZV
)
2762 windows_or_buffers_changed
++;
2766 /* Deiconify the frame containing the window WINDOW,
2767 unless it is the selected frame;
2770 The reason for the exception for the selected frame
2771 is that it seems better not to change the selected frames visibility
2772 merely because of displaying a different buffer in it.
2773 The deiconification is useful when a buffer gets shown in
2774 another frame that you were not using lately. */
2777 display_buffer_1 (window
)
2780 Lisp_Object frame
= XWINDOW (window
)->frame
;
2781 FRAME_PTR f
= XFRAME (frame
);
2783 FRAME_SAMPLE_VISIBILITY (f
);
2785 if (!EQ (frame
, selected_frame
))
2787 if (FRAME_ICONIFIED_P (f
))
2788 Fmake_frame_visible (frame
);
2789 else if (FRAME_VISIBLE_P (f
))
2790 Fraise_frame (frame
);
2796 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2797 "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\
2798 The value is actually t if the frame should be called with default frame\n\
2799 parameters, and a list of frame parameters if they were specified.\n\
2800 See `special-display-buffer-names', and `special-display-regexps'.")
2802 Lisp_Object buffer_name
;
2806 CHECK_STRING (buffer_name
, 1);
2808 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2812 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2816 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2818 Lisp_Object car
= XCAR (tem
);
2820 && fast_string_match (car
, buffer_name
) >= 0)
2822 else if (CONSP (car
)
2823 && STRINGP (XCAR (car
))
2824 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2830 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2831 "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\
2832 See `same-window-buffer-names' and `same-window-regexps'.")
2834 Lisp_Object buffer_name
;
2838 CHECK_STRING (buffer_name
, 1);
2840 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2844 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2848 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2850 Lisp_Object car
= XCAR (tem
);
2852 && fast_string_match (car
, buffer_name
) >= 0)
2854 else if (CONSP (car
)
2855 && STRINGP (XCAR (car
))
2856 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2862 /* Use B so the default is (other-buffer). */
2863 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
2864 "BDisplay buffer: \nP",
2865 "Make BUFFER appear in some window but don't select it.\n\
2866 BUFFER can be a buffer or a buffer name.\n\
2867 If BUFFER is shown already in some window, just use that one,\n\
2868 unless the window is the selected window and the optional second\n\
2869 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
2870 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
2871 Returns the window displaying BUFFER.\n\
2872 If `display-reuse-frames' is non-nil, and another frame is currently\n\
2873 displaying BUFFER, then simply raise that frame.\n\
2875 The variables `special-display-buffer-names', `special-display-regexps',\n\
2876 `same-window-buffer-names', and `same-window-regexps' customize how certain\n\
2877 buffer names are handled.\n\
2879 If optional argument FRAME is `visible', search all visible frames.\n\
2880 If FRAME is 0, search all visible and iconified frames.\n\
2881 If FRAME is t, search all frames.\n\
2882 If FRAME is a frame, search only that frame.\n\
2883 If FRAME is nil, search only the selected frame\n\
2884 (actually the last nonminibuffer frame),\n\
2885 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,\n\
2886 which means search visible and iconified frames.\n\
2888 If `even-window-heights' is non-nil, window heights will be evened out\n\
2889 if displaying the buffer causes two vertically adjacent windows to be\n\
2891 (buffer
, not_this_window
, frame
)
2892 register Lisp_Object buffer
, not_this_window
, frame
;
2894 register Lisp_Object window
, tem
, swp
;
2898 buffer
= Fget_buffer (buffer
);
2899 CHECK_BUFFER (buffer
, 0);
2901 if (!NILP (Vdisplay_buffer_function
))
2902 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2904 if (NILP (not_this_window
)
2905 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2906 return display_buffer_1 (selected_window
);
2908 /* See if the user has specified this buffer should appear
2909 in the selected window. */
2910 if (NILP (not_this_window
))
2912 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
2913 if (!NILP (swp
) && !no_switch_window (selected_window
))
2915 Fswitch_to_buffer (buffer
, Qnil
);
2916 return display_buffer_1 (selected_window
);
2920 /* If the user wants pop-up-frames or display-reuse-frames, then
2921 look for a window showing BUFFER on any visible or iconified frame.
2922 Otherwise search only the current frame. */
2925 else if (pop_up_frames
2926 || display_buffer_reuse_frames
2927 || last_nonminibuf_frame
== 0)
2928 XSETFASTINT (tem
, 0);
2930 XSETFRAME (tem
, last_nonminibuf_frame
);
2932 window
= Fget_buffer_window (buffer
, tem
);
2934 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2935 return display_buffer_1 (window
);
2937 /* Certain buffer names get special handling. */
2938 if (!NILP (Vspecial_display_function
) && NILP (swp
))
2940 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2942 return call1 (Vspecial_display_function
, buffer
);
2944 return call2 (Vspecial_display_function
, buffer
, tem
);
2947 /* If there are no frames open that have more than a minibuffer,
2948 we need to create a new frame. */
2949 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2951 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2952 Fset_window_buffer (window
, buffer
);
2953 return display_buffer_1 (window
);
2956 f
= SELECTED_FRAME ();
2958 || FRAME_MINIBUF_ONLY_P (f
)
2959 /* If the current frame is a special display frame,
2960 don't try to reuse its windows. */
2961 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
2966 if (FRAME_MINIBUF_ONLY_P (f
))
2967 XSETFRAME (frames
, last_nonminibuf_frame
);
2968 /* Don't try to create a window if would get an error */
2969 if (split_height_threshold
< window_min_height
<< 1)
2970 split_height_threshold
= window_min_height
<< 1;
2972 /* Note that both Fget_largest_window and Fget_lru_window
2973 ignore minibuffers and dedicated windows.
2974 This means they can return nil. */
2976 /* If the frame we would try to split cannot be split,
2977 try other frames. */
2978 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
2980 /* Try visible frames first. */
2981 window
= Fget_largest_window (Qvisible
);
2982 /* If that didn't work, try iconified frames. */
2984 window
= Fget_largest_window (make_number (0));
2986 window
= Fget_largest_window (Qt
);
2989 window
= Fget_largest_window (frames
);
2991 /* If we got a tall enough full-width window that can be split,
2994 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2995 && window_height (window
) >= split_height_threshold
2996 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
2997 window
= Fsplit_window (window
, Qnil
, Qnil
);
3000 Lisp_Object upper
, lower
, other
;
3002 window
= Fget_lru_window (frames
);
3003 /* If the LRU window is selected, and big enough,
3004 and can be split, split it. */
3006 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3007 && (EQ (window
, selected_window
)
3008 || EQ (XWINDOW (window
)->parent
, Qnil
))
3009 && window_height (window
) >= window_min_height
<< 1)
3010 window
= Fsplit_window (window
, Qnil
, Qnil
);
3011 /* If Fget_lru_window returned nil, try other approaches. */
3013 /* Try visible frames first. */
3015 window
= Fget_buffer_window (buffer
, Qvisible
);
3017 window
= Fget_largest_window (Qvisible
);
3018 /* If that didn't work, try iconified frames. */
3020 window
= Fget_buffer_window (buffer
, make_number (0));
3022 window
= Fget_largest_window (make_number (0));
3023 /* Try invisible frames. */
3025 window
= Fget_buffer_window (buffer
, Qt
);
3027 window
= Fget_largest_window (Qt
);
3028 /* As a last resort, make a new frame. */
3030 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3031 /* If window appears above or below another,
3032 even out their heights. */
3033 other
= upper
= lower
= Qnil
;
3034 if (!NILP (XWINDOW (window
)->prev
))
3035 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3036 if (!NILP (XWINDOW (window
)->next
))
3037 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3039 && !NILP (Veven_window_heights
)
3040 /* Check that OTHER and WINDOW are vertically arrayed. */
3041 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
3042 && (XFASTINT (XWINDOW (other
)->height
)
3043 > XFASTINT (XWINDOW (window
)->height
)))
3045 int total
= (XFASTINT (XWINDOW (other
)->height
)
3046 + XFASTINT (XWINDOW (window
)->height
));
3047 enlarge_window (upper
,
3048 total
/ 2 - XFASTINT (XWINDOW (upper
)->height
),
3054 window
= Fget_lru_window (Qnil
);
3056 Fset_window_buffer (window
, buffer
);
3057 return display_buffer_1 (window
);
3061 temp_output_buffer_show (buf
)
3062 register Lisp_Object buf
;
3064 register struct buffer
*old
= current_buffer
;
3065 register Lisp_Object window
;
3066 register struct window
*w
;
3068 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3071 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3075 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3076 set_buffer_internal (old
);
3078 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3079 call1 (Vtemp_buffer_show_function
, buf
);
3082 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3084 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3085 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3086 Vminibuf_scroll_window
= window
;
3087 w
= XWINDOW (window
);
3088 XSETFASTINT (w
->hscroll
, 0);
3089 set_marker_restricted_both (w
->start
, buf
, 1, 1);
3090 set_marker_restricted_both (w
->pointm
, buf
, 1, 1);
3092 /* Run temp-buffer-show-hook, with the chosen window selected
3093 and it sbuffer current. */
3094 if (!NILP (Vrun_hooks
))
3097 tem
= Fboundp (Qtemp_buffer_show_hook
);
3100 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
3103 int count
= specpdl_ptr
- specpdl
;
3104 Lisp_Object prev_window
;
3105 prev_window
= selected_window
;
3107 /* Select the window that was chosen, for running the hook. */
3108 record_unwind_protect (Fselect_window
, prev_window
);
3109 select_window_1 (window
, 0);
3110 Fset_buffer (w
->buffer
);
3111 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3112 select_window_1 (prev_window
, 0);
3113 unbind_to (count
, Qnil
);
3121 make_dummy_parent (window
)
3125 register struct window
*o
, *p
;
3126 register struct Lisp_Vector
*vec
;
3129 o
= XWINDOW (window
);
3130 vec
= allocate_vectorlike ((EMACS_INT
)VECSIZE (struct window
));
3131 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3132 vec
->contents
[i
] = ((struct Lisp_Vector
*)o
)->contents
[i
];
3133 vec
->size
= VECSIZE (struct window
);
3134 p
= (struct window
*)vec
;
3135 XSETWINDOW (new, p
);
3137 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
3139 /* Put new into window structure in place of window */
3140 replace_window (window
, new);
3153 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3154 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
3155 WINDOW defaults to selected one and SIZE to half its size.\n\
3156 If optional third arg HORFLAG is non-nil, split side by side\n\
3157 and put SIZE columns in the first of the pair. In that case,\n\
3158 SIZE includes that window's scroll bar, or the divider column to its right.")
3159 (window
, size
, horflag
)
3160 Lisp_Object window
, size
, horflag
;
3162 register Lisp_Object
new;
3163 register struct window
*o
, *p
;
3165 register int size_int
;
3168 window
= selected_window
;
3170 CHECK_LIVE_WINDOW (window
, 0);
3172 o
= XWINDOW (window
);
3173 fo
= XFRAME (WINDOW_FRAME (o
));
3177 if (!NILP (horflag
))
3178 /* Calculate the size of the left-hand window, by dividing
3179 the usable space in columns by two.
3180 We round up, since the left-hand window may include
3181 a dividing line, while the right-hand may not. */
3182 size_int
= (XFASTINT (o
->width
) + 1) >> 1;
3184 size_int
= XFASTINT (o
->height
) >> 1;
3188 CHECK_NUMBER (size
, 1);
3189 size_int
= XINT (size
);
3192 if (MINI_WINDOW_P (o
))
3193 error ("Attempt to split minibuffer window");
3194 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3195 error ("Attempt to split fixed-size window");
3197 check_min_window_sizes ();
3201 if (size_int
< window_min_height
)
3202 error ("Window height %d too small (after splitting)", size_int
);
3203 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
3204 error ("Window height %d too small (after splitting)",
3205 XFASTINT (o
->height
) - size_int
);
3206 if (NILP (o
->parent
)
3207 || NILP (XWINDOW (o
->parent
)->vchild
))
3209 make_dummy_parent (window
);
3211 XWINDOW (new)->vchild
= window
;
3216 if (size_int
< window_min_width
)
3217 error ("Window width %d too small (after splitting)", size_int
);
3219 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
3220 error ("Window width %d too small (after splitting)",
3221 XFASTINT (o
->width
) - size_int
);
3222 if (NILP (o
->parent
)
3223 || NILP (XWINDOW (o
->parent
)->hchild
))
3225 make_dummy_parent (window
);
3227 XWINDOW (new)->hchild
= window
;
3231 /* Now we know that window's parent is a vertical combination
3232 if we are dividing vertically, or a horizontal combination
3233 if we are making side-by-side windows */
3235 windows_or_buffers_changed
++;
3236 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3237 new = make_window ();
3240 p
->frame
= o
->frame
;
3242 if (!NILP (p
->next
))
3243 XWINDOW (p
->next
)->prev
= new;
3246 p
->parent
= o
->parent
;
3248 p
->window_end_valid
= Qnil
;
3249 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3251 /* Apportion the available frame space among the two new windows */
3253 if (!NILP (horflag
))
3255 p
->height
= o
->height
;
3257 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
3258 XSETFASTINT (o
->width
, size_int
);
3259 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
3264 p
->width
= o
->width
;
3265 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
3266 XSETFASTINT (o
->height
, size_int
);
3267 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
3270 /* Adjust glyph matrices. */
3272 Fset_window_buffer (new, o
->buffer
);
3276 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
3277 "Make current window ARG lines bigger.\n\
3278 From program, optional second arg non-nil means grow sideways ARG columns.")
3280 register Lisp_Object arg
, side
;
3282 CHECK_NUMBER (arg
, 0);
3283 enlarge_window (selected_window
, XINT (arg
), !NILP (side
));
3285 if (! NILP (Vwindow_configuration_change_hook
))
3286 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3291 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
3292 "Make current window ARG lines smaller.\n\
3293 From program, optional second arg non-nil means shrink sideways arg columns.")
3295 register Lisp_Object arg
, side
;
3297 CHECK_NUMBER (arg
, 0);
3298 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
3300 if (! NILP (Vwindow_configuration_change_hook
))
3301 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3307 window_height (window
)
3310 register struct window
*p
= XWINDOW (window
);
3311 return XFASTINT (p
->height
);
3315 window_width (window
)
3318 register struct window
*p
= XWINDOW (window
);
3319 return XFASTINT (p
->width
);
3324 *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top))
3326 #define CURSIZE(w) \
3327 *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height))
3330 /* Enlarge selected_window by DELTA. WIDTHFLAG non-zero means
3331 increase its width. Siblings of the selected window are resized to
3332 fullfil the size request. If they become too small in the process,
3333 they will be deleted. */
3336 enlarge_window (window
, delta
, widthflag
)
3338 int delta
, widthflag
;
3340 Lisp_Object parent
, next
, prev
;
3344 int (*sizefun
) P_ ((Lisp_Object
))
3345 = widthflag
? window_width
: window_height
;
3346 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3347 = (widthflag
? set_window_width
: set_window_height
);
3349 /* Check values of window_min_width and window_min_height for
3351 check_min_window_sizes ();
3353 /* Give up if this window cannot be resized. */
3354 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3355 error ("Window is not resizable");
3357 /* Find the parent of the selected window. */
3360 p
= XWINDOW (window
);
3366 error ("No other window to side of this one");
3371 ? !NILP (XWINDOW (parent
)->hchild
)
3372 : !NILP (XWINDOW (parent
)->vchild
))
3378 sizep
= &CURSIZE (window
);
3381 register int maxdelta
;
3383 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
3384 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
3385 - window_min_size (XWINDOW (p
->next
),
3387 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
3388 - window_min_size (XWINDOW (p
->prev
),
3390 /* This is a frame with only one window, a minibuffer-only
3391 or a minibufferless frame. */
3394 if (delta
> maxdelta
)
3395 /* This case traps trying to make the minibuffer
3396 the full frame, or make the only window aside from the
3397 minibuffer the full frame. */
3401 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
3403 delete_window (window
);
3410 /* Find the total we can get from other siblings. */
3412 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
3413 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
3415 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
3416 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
3419 /* If we can get it all from them, do so. */
3420 if (delta
<= maximum
)
3422 Lisp_Object first_unaffected
;
3423 Lisp_Object first_affected
;
3428 first_affected
= window
;
3429 /* Look at one sibling at a time,
3430 moving away from this window in both directions alternately,
3431 and take as much as we can get without deleting that sibling. */
3432 while (delta
!= 0 && (!NILP (next
) || !NILP (prev
)))
3436 int this_one
= ((*sizefun
) (next
)
3437 - window_min_size (XWINDOW (next
),
3438 widthflag
, 0, &fixed_p
));
3441 if (this_one
> delta
)
3444 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
3445 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3450 next
= XWINDOW (next
)->next
;
3458 int this_one
= ((*sizefun
) (prev
)
3459 - window_min_size (XWINDOW (prev
),
3460 widthflag
, 0, &fixed_p
));
3463 if (this_one
> delta
)
3466 first_affected
= prev
;
3468 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
3469 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3474 prev
= XWINDOW (prev
)->prev
;
3478 xassert (delta
== 0);
3480 /* Now recalculate the edge positions of all the windows affected,
3481 based on the new sizes. */
3482 first_unaffected
= next
;
3483 prev
= first_affected
;
3484 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
3485 prev
= next
, next
= XWINDOW (next
)->next
)
3487 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
3488 /* This does not change size of NEXT,
3489 but it propagates the new top edge to its children */
3490 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
3495 register int delta1
;
3496 register int opht
= (*sizefun
) (parent
);
3498 /* If trying to grow this window to or beyond size of the parent,
3499 make delta1 so big that, on shrinking back down,
3500 all the siblings end up with less than one line and are deleted. */
3501 if (opht
<= XINT (*sizep
) + delta
)
3502 delta1
= opht
* opht
* 2;
3505 /* Otherwise, make delta1 just right so that if we add
3506 delta1 lines to this window and to the parent, and then
3507 shrink the parent back to its original size, the new
3508 proportional size of this window will increase by delta.
3510 The function size_window will compute the new height h'
3511 of the window from delta1 as:
3514 x = delta1 - delta1/n * n for the 1st resizable child
3517 where n is the number of children that can be resized.
3518 We can ignore x by choosing a delta1 that is a multiple of
3519 n. We want the height of this window to come out as
3529 The number of children n rquals the number of resizable
3530 children of this window + 1 because we know window itself
3531 is resizable (otherwise we would have signalled an error. */
3533 struct window
*w
= XWINDOW (window
);
3537 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
3538 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3540 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
3541 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3547 /* Add delta1 lines or columns to this window, and to the parent,
3548 keeping things consistent while not affecting siblings. */
3549 XSETINT (CURSIZE (parent
), opht
+ delta1
);
3550 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
3552 /* Squeeze out delta1 lines or columns from our parent,
3553 shriking this window and siblings proportionately.
3554 This brings parent back to correct size.
3555 Delta1 was calculated so this makes this window the desired size,
3556 taking it all out of the siblings. */
3557 (*setsizefun
) (parent
, opht
, 0);
3560 XSETFASTINT (p
->last_modified
, 0);
3561 XSETFASTINT (p
->last_overlay_modified
, 0);
3563 /* Adjust glyph matrices. */
3564 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
3572 /***********************************************************************
3573 Resizing Mini-Windows
3574 ***********************************************************************/
3576 static void shrink_window_lowest_first
P_ ((struct window
*, int));
3578 enum save_restore_action
3585 static int save_restore_orig_size
P_ ((struct window
*,
3586 enum save_restore_action
));
3588 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
3589 from lowest windows first. */
3592 shrink_window_lowest_first (w
, height
)
3600 xassert (!MINI_WINDOW_P (w
));
3602 /* Set redisplay hints. */
3603 XSETFASTINT (w
->last_modified
, 0);
3604 XSETFASTINT (w
->last_overlay_modified
, 0);
3605 windows_or_buffers_changed
++;
3606 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
3608 old_height
= XFASTINT (w
->height
);
3609 XSETFASTINT (w
->height
, height
);
3611 if (!NILP (w
->hchild
))
3613 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
3615 c
= XWINDOW (child
);
3617 shrink_window_lowest_first (c
, height
);
3620 else if (!NILP (w
->vchild
))
3622 Lisp_Object last_child
;
3623 int delta
= old_height
- height
;
3628 /* Find the last child. We are taking space from lowest windows
3629 first, so we iterate over children from the last child
3631 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
3634 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
3635 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
3639 c
= XWINDOW (child
);
3640 this_one
= XFASTINT (c
->height
) - MIN_SAFE_WINDOW_HEIGHT
;
3642 if (this_one
> delta
)
3645 shrink_window_lowest_first (c
, XFASTINT (c
->height
) - this_one
);
3649 /* Compute new positions. */
3650 last_top
= XINT (w
->top
);
3651 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
3653 c
= XWINDOW (child
);
3654 c
->top
= make_number (last_top
);
3655 shrink_window_lowest_first (c
, XFASTINT (c
->height
));
3656 last_top
+= XFASTINT (c
->height
);
3662 /* Save, restore, or check positions and sizes in the window tree
3663 rooted at W. ACTION says what to do.
3665 If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height
3666 members are valid for all windows in the window tree. Value is
3667 non-zero if they are valid.
3669 If ACTION is SAVE_ORIG_SIZES, save members top and height in
3670 orig_top and orig_height for all windows in the tree.
3672 If ACTION is RESTORE_ORIG_SIZES, restore top and height from
3673 values stored in orig_top and orig_height for all windows. */
3676 save_restore_orig_size (w
, action
)
3678 enum save_restore_action action
;
3684 if (!NILP (w
->hchild
))
3686 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
3689 else if (!NILP (w
->vchild
))
3691 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
3697 case CHECK_ORIG_SIZES
:
3698 if (!INTEGERP (w
->orig_top
) || !INTEGERP (w
->orig_height
))
3702 case SAVE_ORIG_SIZES
:
3703 w
->orig_top
= w
->top
;
3704 w
->orig_height
= w
->height
;
3705 XSETFASTINT (w
->last_modified
, 0);
3706 XSETFASTINT (w
->last_overlay_modified
, 0);
3709 case RESTORE_ORIG_SIZES
:
3710 xassert (INTEGERP (w
->orig_top
) && INTEGERP (w
->orig_height
));
3711 w
->top
= w
->orig_top
;
3712 w
->height
= w
->orig_height
;
3713 w
->orig_height
= w
->orig_top
= Qnil
;
3714 XSETFASTINT (w
->last_modified
, 0);
3715 XSETFASTINT (w
->last_overlay_modified
, 0);
3722 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
3729 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
3730 without deleting other windows. */
3733 grow_mini_window (w
, delta
)
3737 struct frame
*f
= XFRAME (w
->frame
);
3738 struct window
*root
;
3740 xassert (MINI_WINDOW_P (w
));
3741 xassert (delta
>= 0);
3743 /* Check values of window_min_width and window_min_height for
3745 check_min_window_sizes ();
3747 /* Compute how much we can enlarge the mini-window without deleting
3749 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3752 int min_height
= window_min_size (root
, 0, 0, 0);
3753 if (XFASTINT (root
->height
) - delta
< min_height
)
3754 delta
= XFASTINT (root
->height
) - min_height
;
3759 /* Save original window sizes and positions, if not already done. */
3760 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3761 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
3763 /* Shrink other windows. */
3764 shrink_window_lowest_first (root
, XFASTINT (root
->height
) - delta
);
3766 /* Grow the mini-window. */
3767 w
->top
= make_number (XFASTINT (root
->top
) + XFASTINT (root
->height
));
3768 w
->height
= make_number (XFASTINT (w
->height
) + delta
);
3769 XSETFASTINT (w
->last_modified
, 0);
3770 XSETFASTINT (w
->last_overlay_modified
, 0);
3777 /* Shrink mini-window W. If there is recorded info about window sizes
3778 before a call to grow_mini_window, restore recorded window sizes.
3779 Otherwise, if the mini-window is higher than 1 line, resize it to 1
3783 shrink_mini_window (w
)
3786 struct frame
*f
= XFRAME (w
->frame
);
3787 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3789 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3791 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
3793 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3794 windows_or_buffers_changed
= 1;
3796 else if (XFASTINT (w
->height
) > 1)
3799 XSETWINDOW (window
, w
);
3800 enlarge_window (window
, 1 - XFASTINT (w
->height
), 0);
3806 /* Mark window cursors off for all windows in the window tree rooted
3807 at W by setting their phys_cursor_on_p flag to zero. Called from
3808 xterm.c, e.g. when a frame is cleared and thereby all cursors on
3809 the frame are cleared. */
3812 mark_window_cursors_off (w
)
3817 if (!NILP (w
->hchild
))
3818 mark_window_cursors_off (XWINDOW (w
->hchild
));
3819 else if (!NILP (w
->vchild
))
3820 mark_window_cursors_off (XWINDOW (w
->vchild
));
3822 w
->phys_cursor_on_p
= 0;
3824 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3829 /* Return number of lines of text (not counting mode line) in W. */
3832 window_internal_height (w
)
3835 int ht
= XFASTINT (w
->height
);
3837 if (MINI_WINDOW_P (w
))
3840 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
3841 || !NILP (w
->next
) || !NILP (w
->prev
)
3842 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
3849 /* Return the number of columns in W.
3850 Don't count columns occupied by scroll bars or the vertical bar
3851 separating W from the sibling to its right. */
3854 window_internal_width (w
)
3857 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3858 int width
= XINT (w
->width
);
3860 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3861 /* Scroll bars occupy a few columns. */
3862 width
-= FRAME_SCROLL_BAR_COLS (f
);
3863 else if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
3864 /* The column of `|' characters separating side-by-side windows
3865 occupies one column only. */
3868 /* On window-systems, areas to the left and right of the window
3869 are used to display bitmaps there. */
3870 if (FRAME_WINDOW_P (f
))
3871 width
-= FRAME_FLAGS_AREA_COLS (f
);
3877 /************************************************************************
3879 ***********************************************************************/
3881 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
3882 one screen-full, which is defined as the height of the window minus
3883 next_screen_context_lines. If WHOLE is zero, scroll up N lines
3884 instead. Negative values of N mean scroll down. NOERROR non-zero
3885 means don't signal an error if we try to move over BEGV or ZV,
3889 window_scroll (window
, n
, whole
, noerror
)
3895 /* If we must, use the pixel-based version which is much slower than
3896 the line-based one but can handle varying line heights. */
3897 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
3898 window_scroll_pixel_based (window
, n
, whole
, noerror
);
3900 window_scroll_line_based (window
, n
, whole
, noerror
);
3904 /* Implementation of window_scroll that works based on pixel line
3905 heights. See the comment of window_scroll for parameter
3909 window_scroll_pixel_based (window
, n
, whole
, noerror
)
3916 struct window
*w
= XWINDOW (window
);
3917 struct text_pos start
;
3919 int this_scroll_margin
;
3921 /* True if we fiddled the window vscroll field without really scrolling. */
3924 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
3926 /* If PT is not visible in WINDOW, move back one half of
3928 XSETFASTINT (tem
, PT
);
3929 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
3932 /* Move backward half the height of the window. Performance note:
3933 vmotion used here is about 10% faster, but would give wrong
3934 results for variable height lines. */
3935 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3936 it
.current_y
= it
.last_visible_y
;
3937 move_it_vertically (&it
, -it
.last_visible_y
/ 2);
3939 /* The function move_iterator_vertically may move over more than
3940 the specified y-distance. If it->w is small, e.g. a
3941 mini-buffer window, we may end up in front of the window's
3942 display area. This is the case when Start displaying at the
3943 start of the line containing PT in this case. */
3944 if (it
.current_y
<= 0)
3946 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3947 move_it_vertically (&it
, 0);
3951 start
= it
.current
.pos
;
3954 /* If scroll_preserve_screen_position is non-zero, we try to set
3955 point in the same window line as it is now, so get that line. */
3956 if (!NILP (Vscroll_preserve_screen_position
))
3958 start_display (&it
, w
, start
);
3959 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
3960 preserve_y
= it
.current_y
;
3965 /* Move iterator it from start the specified distance forward or
3966 backward. The result is the new window start. */
3967 start_display (&it
, w
, start
);
3970 int screen_full
= (it
.last_visible_y
3971 - next_screen_context_lines
* CANON_Y_UNIT (it
.f
));
3972 int direction
= n
< 0 ? -1 : 1;
3973 move_it_vertically (&it
, direction
* screen_full
);
3976 move_it_by_lines (&it
, n
, 1);
3978 /* End if we end up at ZV or BEGV. */
3979 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
3980 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
3982 if (IT_CHARPOS (it
) == ZV
)
3984 if (it
.current_y
+ it
.max_ascent
+ it
.max_descent
3985 > it
.last_visible_y
)
3986 /* The last line was only partially visible, make it fully
3990 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
;
3994 Fsignal (Qend_of_buffer
, Qnil
);
3998 if (w
->vscroll
!= 0)
3999 /* The first line was only partially visible, make it fully
4005 Fsignal (Qbeginning_of_buffer
, Qnil
);
4008 /* If control gets here, then we vscrolled. */
4010 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4012 /* Don't try to change the window start below. */
4018 /* Set the window start, and set up the window for redisplay. */
4019 set_marker_restricted (w
->start
, make_number (IT_CHARPOS (it
)),
4021 w
->start_at_line_beg
= Fbolp ();
4022 w
->update_mode_line
= Qt
;
4023 XSETFASTINT (w
->last_modified
, 0);
4024 XSETFASTINT (w
->last_overlay_modified
, 0);
4025 /* Set force_start so that redisplay_window will run the
4026 window-scroll-functions. */
4027 w
->force_start
= Qt
;
4030 it
.current_y
= it
.vpos
= 0;
4032 /* Preserve the screen position if we must. */
4033 if (preserve_y
>= 0)
4035 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4036 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4040 /* Move PT out of scroll margins. */
4041 this_scroll_margin
= max (0, scroll_margin
);
4042 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
4043 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
4047 /* We moved the window start towards ZV, so PT may be now
4048 in the scroll margin at the top. */
4049 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4050 while (it
.current_y
< this_scroll_margin
)
4051 move_it_by_lines (&it
, 1, 1);
4052 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4056 int charpos
, bytepos
;
4058 /* We moved the window start towards BEGV, so PT may be now
4059 in the scroll margin at the bottom. */
4060 move_it_to (&it
, PT
, -1,
4061 it
.last_visible_y
- this_scroll_margin
- 1, -1,
4062 MOVE_TO_POS
| MOVE_TO_Y
);
4064 /* Save our position, in case it's correct. */
4065 charpos
= IT_CHARPOS (it
);
4066 bytepos
= IT_BYTEPOS (it
);
4068 /* See if point is on a partially visible line at the end. */
4069 move_it_by_lines (&it
, 1, 1);
4070 if (it
.current_y
> it
.last_visible_y
)
4071 /* The last line was only partially visible, so back up two
4072 lines to make sure we're on a fully visible line. */
4074 move_it_by_lines (&it
, -2, 0);
4075 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4078 /* No, the position we saved is OK, so use it. */
4079 SET_PT_BOTH (charpos
, bytepos
);
4085 /* Implementation of window_scroll that works based on screen lines.
4086 See the comment of window_scroll for parameter descriptions. */
4089 window_scroll_line_based (window
, n
, whole
, noerror
)
4095 register struct window
*w
= XWINDOW (window
);
4096 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4097 register int pos
, pos_byte
;
4098 register int ht
= window_internal_height (w
);
4099 register Lisp_Object tem
;
4103 struct position posit
;
4106 startpos
= marker_position (w
->start
);
4108 posit
= *compute_motion (startpos
, 0, 0, 0,
4110 window_internal_width (w
), XINT (w
->hscroll
),
4112 original_vpos
= posit
.vpos
;
4114 XSETFASTINT (tem
, PT
);
4115 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4119 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4124 lose
= n
< 0 && PT
== BEGV
;
4125 Fvertical_motion (make_number (n
), window
);
4129 SET_PT_BOTH (opoint
, opoint_byte
);
4136 Fsignal (Qbeginning_of_buffer
, Qnil
);
4141 int this_scroll_margin
= scroll_margin
;
4143 /* Don't use a scroll margin that is negative or too large. */
4144 if (this_scroll_margin
< 0)
4145 this_scroll_margin
= 0;
4147 if (XINT (w
->height
) < 4 * scroll_margin
)
4148 this_scroll_margin
= XINT (w
->height
) / 4;
4150 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4151 w
->start_at_line_beg
= bolp
;
4152 w
->update_mode_line
= Qt
;
4153 XSETFASTINT (w
->last_modified
, 0);
4154 XSETFASTINT (w
->last_overlay_modified
, 0);
4155 /* Set force_start so that redisplay_window will run
4156 the window-scroll-functions. */
4157 w
->force_start
= Qt
;
4159 if (whole
&& !NILP (Vscroll_preserve_screen_position
))
4161 SET_PT_BOTH (pos
, pos_byte
);
4162 Fvertical_motion (make_number (original_vpos
), window
);
4164 /* If we scrolled forward, put point enough lines down
4165 that it is outside the scroll margin. */
4170 if (this_scroll_margin
> 0)
4172 SET_PT_BOTH (pos
, pos_byte
);
4173 Fvertical_motion (make_number (this_scroll_margin
), window
);
4179 if (top_margin
<= opoint
)
4180 SET_PT_BOTH (opoint
, opoint_byte
);
4181 else if (!NILP (Vscroll_preserve_screen_position
))
4183 SET_PT_BOTH (pos
, pos_byte
);
4184 Fvertical_motion (make_number (original_vpos
), window
);
4187 SET_PT (top_margin
);
4193 /* If we scrolled backward, put point near the end of the window
4194 but not within the scroll margin. */
4195 SET_PT_BOTH (pos
, pos_byte
);
4196 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4197 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4200 bottom_margin
= PT
+ 1;
4202 if (bottom_margin
> opoint
)
4203 SET_PT_BOTH (opoint
, opoint_byte
);
4206 if (!NILP (Vscroll_preserve_screen_position
))
4208 SET_PT_BOTH (pos
, pos_byte
);
4209 Fvertical_motion (make_number (original_vpos
), window
);
4212 Fvertical_motion (make_number (-1), window
);
4221 Fsignal (Qend_of_buffer
, Qnil
);
4226 /* Scroll selected_window up or down. If N is nil, scroll a
4227 screen-full which is defined as the height of the window minus
4228 next_screen_context_lines. If N is the symbol `-', scroll.
4229 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
4230 up. This is the guts of Fscroll_up and Fscroll_down. */
4233 scroll_command (n
, direction
)
4237 register int defalt
;
4238 int count
= specpdl_ptr
- specpdl
;
4240 xassert (abs (direction
) == 1);
4242 /* If selected window's buffer isn't current, make it current for
4243 the moment. But don't screw up if window_scroll gets an error. */
4244 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
4246 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4247 Fset_buffer (XWINDOW (selected_window
)->buffer
);
4249 /* Make redisplay consider other windows than just selected_window. */
4250 ++windows_or_buffers_changed
;
4253 defalt
= (window_internal_height (XWINDOW (selected_window
))
4254 - next_screen_context_lines
);
4255 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
4258 window_scroll (selected_window
, defalt
, 1, 0);
4259 else if (EQ (n
, Qminus
))
4260 window_scroll (selected_window
, - defalt
, 1, 0);
4263 n
= Fprefix_numeric_value (n
);
4264 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
4267 unbind_to (count
, Qnil
);
4270 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
4271 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
4272 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4273 Negative ARG means scroll downward.\n\
4274 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4275 When calling from a program, supply as argument a number, nil, or `-'.")
4279 scroll_command (arg
, 1);
4283 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
4284 "Scroll text of current window down ARG lines; or near full screen if no ARG.\n\
4285 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4286 Negative ARG means scroll upward.\n\
4287 If ARG is the atom `-', scroll upward by nearly full screen.\n\
4288 When calling from a program, supply as argument a number, nil, or `-'.")
4292 scroll_command (arg
, -1);
4296 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
4297 "Return the other window for \"other window scroll\" commands.\n\
4298 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4299 specifies the window.\n\
4300 If `other-window-scroll-buffer' is non-nil, a window\n\
4301 showing that buffer is used.")
4306 if (MINI_WINDOW_P (XWINDOW (selected_window
))
4307 && !NILP (Vminibuf_scroll_window
))
4308 window
= Vminibuf_scroll_window
;
4309 /* If buffer is specified, scroll that buffer. */
4310 else if (!NILP (Vother_window_scroll_buffer
))
4312 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
4314 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
4318 /* Nothing specified; look for a neighboring window on the same
4320 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
4322 if (EQ (window
, selected_window
))
4323 /* That didn't get us anywhere; look for a window on another
4326 window
= Fnext_window (window
, Qnil
, Qt
);
4327 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
4328 && ! EQ (window
, selected_window
));
4331 CHECK_LIVE_WINDOW (window
, 0);
4333 if (EQ (window
, selected_window
))
4334 error ("There is no other window");
4339 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
4340 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
4341 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4342 The next window is the one below the current one; or the one at the top\n\
4343 if the current one is at the bottom. Negative ARG means scroll downward.\n\
4344 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4345 When calling from a program, supply as argument a number, nil, or `-'.\n\
4347 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4348 specifies the window to scroll.\n\
4349 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
4350 showing that buffer, popping the buffer up if necessary.")
4352 register Lisp_Object arg
;
4354 register Lisp_Object window
;
4355 register int defalt
;
4356 register struct window
*w
;
4357 register int count
= specpdl_ptr
- specpdl
;
4359 window
= Fother_window_for_scrolling ();
4361 w
= XWINDOW (window
);
4362 defalt
= window_internal_height (w
) - next_screen_context_lines
;
4363 if (defalt
< 1) defalt
= 1;
4365 /* Don't screw up if window_scroll gets an error. */
4366 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4367 ++windows_or_buffers_changed
;
4369 Fset_buffer (w
->buffer
);
4370 SET_PT (marker_position (w
->pointm
));
4373 window_scroll (window
, defalt
, 1, 1);
4374 else if (EQ (arg
, Qminus
))
4375 window_scroll (window
, -defalt
, 1, 1);
4380 CHECK_NUMBER (arg
, 0);
4381 window_scroll (window
, XINT (arg
), 0, 1);
4384 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
4385 unbind_to (count
, Qnil
);
4390 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
4391 "Scroll selected window display ARG columns left.\n\
4392 Default for ARG is window width minus 2.")
4394 register Lisp_Object arg
;
4398 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
4400 arg
= Fprefix_numeric_value (arg
);
4403 Fset_window_hscroll (selected_window
,
4404 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
4408 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
4409 "Scroll selected window display ARG columns right.\n\
4410 Default for ARG is window width minus 2.")
4412 register Lisp_Object arg
;
4415 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
4417 arg
= Fprefix_numeric_value (arg
);
4420 Fset_window_hscroll (selected_window
,
4421 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
4425 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
4426 "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\
4427 The desired position of point is always relative to the current window.\n\
4428 Just C-u as prefix means put point in the center of the window.\n\
4429 If ARG is omitted or nil, erases the entire frame and then\n\
4430 redraws with point in the center of the current window.")
4432 register Lisp_Object arg
;
4434 register struct window
*w
= XWINDOW (selected_window
);
4435 register int ht
= window_internal_height (w
);
4436 struct position pos
;
4437 struct buffer
*buf
= XBUFFER (w
->buffer
);
4438 struct buffer
*obuf
= current_buffer
;
4442 extern int frame_garbaged
;
4445 /* Invalidate pixel data calculated for all compositions. */
4446 for (i
= 0; i
< n_compositions
; i
++)
4447 composition_table
[i
]->font
= NULL
;
4449 Fredraw_frame (w
->frame
);
4450 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
4451 XSETFASTINT (arg
, ht
/ 2);
4453 else if (CONSP (arg
)) /* Just C-u. */
4455 XSETFASTINT (arg
, ht
/ 2);
4459 arg
= Fprefix_numeric_value (arg
);
4460 CHECK_NUMBER (arg
, 0);
4464 XSETINT (arg
, XINT (arg
) + ht
);
4466 set_buffer_internal (buf
);
4467 pos
= *vmotion (PT
, - XINT (arg
), w
);
4469 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
4470 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
4471 || FETCH_BYTE (pos
.bytepos
- 1) == '\n')
4473 w
->force_start
= Qt
;
4474 set_buffer_internal (obuf
);
4480 /* Value is the number of lines actually displayed in window W,
4481 as opposed to its height. */
4484 displayed_window_lines (w
)
4488 struct text_pos start
;
4489 int height
= window_box_height (w
);
4490 struct buffer
*old_buffer
;
4493 if (XBUFFER (w
->buffer
) != current_buffer
)
4495 old_buffer
= current_buffer
;
4496 set_buffer_internal (XBUFFER (w
->buffer
));
4501 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4502 start_display (&it
, w
, start
);
4503 move_it_vertically (&it
, height
);
4506 set_buffer_internal (old_buffer
);
4508 bottom_y
= it
.current_y
+ it
.max_ascent
+ it
.max_descent
;
4510 if (bottom_y
> it
.current_y
&& bottom_y
<= it
.last_visible_y
)
4511 /* Hit a line without a terminating newline. */
4514 /* Add in empty lines at the bottom of the window. */
4515 if (bottom_y
< height
)
4517 struct frame
*f
= XFRAME (w
->frame
);
4518 int rest
= height
- bottom_y
;
4519 int lines
= rest
/ CANON_Y_UNIT (f
);
4527 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
4529 "Return the height in lines of the text display area of WINDOW.\n\
4530 This doesn't include the mode-line (or header-line if any) or any\n\
4531 partial-height lines in the text display area.")
4535 struct window
*w
= decode_window (window
);
4536 int pixel_height
= window_box_height (w
);
4537 int line_height
= pixel_height
/ CANON_Y_UNIT (XFRAME (w
->frame
));
4538 return make_number (line_height
);
4543 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
4545 "Position point relative to window.\n\
4546 With no argument, position point at center of window.\n\
4547 An argument specifies vertical position within the window;\n\
4548 zero means top of window, negative means relative to bottom of window.")
4552 struct window
*w
= XWINDOW (selected_window
);
4556 window
= selected_window
;
4557 start
= marker_position (w
->start
);
4558 if (start
< BEGV
|| start
> ZV
)
4560 int height
= window_internal_height (w
);
4561 Fvertical_motion (make_number (- (height
/ 2)), window
);
4562 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
4563 w
->start_at_line_beg
= Fbolp ();
4564 w
->force_start
= Qt
;
4567 Fgoto_char (w
->start
);
4569 lines
= displayed_window_lines (w
);
4571 XSETFASTINT (arg
, lines
/ 2);
4574 arg
= Fprefix_numeric_value (arg
);
4576 XSETINT (arg
, XINT (arg
) + lines
);
4580 /* Skip past a partially visible first line. */
4581 XSETINT (arg
, XINT (arg
) + 1);
4583 return Fvertical_motion (arg
, window
);
4588 /***********************************************************************
4589 Window Configuration
4590 ***********************************************************************/
4592 struct save_window_data
4594 EMACS_INT size_from_Lisp_Vector_struct
;
4595 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4596 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
4597 Lisp_Object frame_tool_bar_lines
;
4598 Lisp_Object selected_frame
;
4599 Lisp_Object current_window
;
4600 Lisp_Object current_buffer
;
4601 Lisp_Object minibuf_scroll_window
;
4602 Lisp_Object root_window
;
4603 Lisp_Object focus_frame
;
4604 /* Record the values of window-min-width and window-min-height
4605 so that window sizes remain consistent with them. */
4606 Lisp_Object min_width
, min_height
;
4607 /* A vector, each of whose elements is a struct saved_window
4609 Lisp_Object saved_windows
;
4612 /* This is saved as a Lisp_Vector */
4615 /* these first two must agree with struct Lisp_Vector in lisp.h */
4616 EMACS_INT size_from_Lisp_Vector_struct
;
4617 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4620 Lisp_Object buffer
, start
, pointm
, mark
;
4621 Lisp_Object left
, top
, width
, height
, hscroll
;
4622 Lisp_Object parent
, prev
;
4623 Lisp_Object start_at_line_beg
;
4624 Lisp_Object display_table
;
4625 Lisp_Object orig_top
, orig_height
;
4627 #define SAVED_WINDOW_VECTOR_SIZE 16 /* Arg to Fmake_vector */
4629 #define SAVED_WINDOW_N(swv,n) \
4630 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
4632 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
4633 "Return t if OBJECT is a window-configuration object.")
4637 if (WINDOW_CONFIGURATIONP (object
))
4642 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
4643 "Return the frame that CONFIG, a window-configuration object, is about.")
4647 register struct save_window_data
*data
;
4648 struct Lisp_Vector
*saved_windows
;
4650 if (! WINDOW_CONFIGURATIONP (config
))
4651 wrong_type_argument (Qwindow_configuration_p
, config
);
4653 data
= (struct save_window_data
*) XVECTOR (config
);
4654 saved_windows
= XVECTOR (data
->saved_windows
);
4655 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4658 DEFUN ("set-window-configuration", Fset_window_configuration
,
4659 Sset_window_configuration
, 1, 1, 0,
4660 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
4661 CONFIGURATION must be a value previously returned\n\
4662 by `current-window-configuration' (which see).\n\
4663 If CONFIGURATION was made from a frame that is now deleted,\n\
4664 only frame-independent values can be restored. In this case,\n\
4665 the return value is nil. Otherwise the value is t.")
4667 Lisp_Object configuration
;
4669 register struct save_window_data
*data
;
4670 struct Lisp_Vector
*saved_windows
;
4671 Lisp_Object new_current_buffer
;
4676 while (!WINDOW_CONFIGURATIONP (configuration
))
4677 wrong_type_argument (Qwindow_configuration_p
, configuration
);
4679 data
= (struct save_window_data
*) XVECTOR (configuration
);
4680 saved_windows
= XVECTOR (data
->saved_windows
);
4682 new_current_buffer
= data
->current_buffer
;
4683 if (NILP (XBUFFER (new_current_buffer
)->name
))
4684 new_current_buffer
= Qnil
;
4687 if (XBUFFER (new_current_buffer
) == current_buffer
)
4691 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4694 /* If f is a dead frame, don't bother rebuilding its window tree.
4695 However, there is other stuff we should still try to do below. */
4696 if (FRAME_LIVE_P (f
))
4698 register struct window
*w
;
4699 register struct saved_window
*p
;
4700 struct window
*root_window
;
4701 struct window
**leaf_windows
;
4705 /* If the frame has been resized since this window configuration was
4706 made, we change the frame to the size specified in the
4707 configuration, restore the configuration, and then resize it
4708 back. We keep track of the prevailing height in these variables. */
4709 int previous_frame_height
= FRAME_HEIGHT (f
);
4710 int previous_frame_width
= FRAME_WIDTH (f
);
4711 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
4712 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
4714 /* The mouse highlighting code could get screwed up
4715 if it runs during this. */
4718 if (XFASTINT (data
->frame_height
) != previous_frame_height
4719 || XFASTINT (data
->frame_width
) != previous_frame_width
)
4720 change_frame_size (f
, XFASTINT (data
->frame_height
),
4721 XFASTINT (data
->frame_width
), 0, 0, 0);
4722 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4723 if (XFASTINT (data
->frame_menu_bar_lines
)
4724 != previous_frame_menu_bar_lines
)
4725 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
4726 #ifdef HAVE_WINDOW_SYSTEM
4727 if (XFASTINT (data
->frame_tool_bar_lines
)
4728 != previous_frame_tool_bar_lines
)
4729 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
4733 /* "Swap out" point from the selected window
4734 into its buffer. We do this now, before
4735 restoring the window contents, and prevent it from
4736 being done later on when we select a new window. */
4737 if (! NILP (XWINDOW (selected_window
)->buffer
))
4739 w
= XWINDOW (selected_window
);
4740 set_marker_both (w
->pointm
,
4742 BUF_PT (XBUFFER (w
->buffer
)),
4743 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4746 windows_or_buffers_changed
++;
4747 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4749 /* Problem: Freeing all matrices and later allocating them again
4750 is a serious redisplay flickering problem. What we would
4751 really like to do is to free only those matrices not reused
4753 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4755 = (struct window
**) alloca (count_windows (root_window
)
4756 * sizeof (struct window
*));
4757 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
4759 /* Temporarily avoid any problems with windows that are smaller
4760 than they are supposed to be. */
4761 window_min_height
= 1;
4762 window_min_width
= 1;
4765 Mark all windows now on frame as "deleted".
4766 Restoring the new configuration "undeletes" any that are in it.
4768 Save their current buffers in their height fields, since we may
4769 need it later, if a buffer saved in the configuration is now
4771 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
4773 for (k
= 0; k
< saved_windows
->size
; k
++)
4775 p
= SAVED_WINDOW_N (saved_windows
, k
);
4776 w
= XWINDOW (p
->window
);
4779 if (!NILP (p
->parent
))
4780 w
->parent
= SAVED_WINDOW_N (saved_windows
,
4781 XFASTINT (p
->parent
))->window
;
4785 if (!NILP (p
->prev
))
4787 w
->prev
= SAVED_WINDOW_N (saved_windows
,
4788 XFASTINT (p
->prev
))->window
;
4789 XWINDOW (w
->prev
)->next
= p
->window
;
4794 if (!NILP (w
->parent
))
4796 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
4798 XWINDOW (w
->parent
)->vchild
= p
->window
;
4799 XWINDOW (w
->parent
)->hchild
= Qnil
;
4803 XWINDOW (w
->parent
)->hchild
= p
->window
;
4804 XWINDOW (w
->parent
)->vchild
= Qnil
;
4809 /* If we squirreled away the buffer in the window's height,
4811 if (BUFFERP (w
->height
))
4812 w
->buffer
= w
->height
;
4815 w
->width
= p
->width
;
4816 w
->height
= p
->height
;
4817 w
->hscroll
= p
->hscroll
;
4818 w
->display_table
= p
->display_table
;
4819 w
->orig_top
= p
->orig_top
;
4820 w
->orig_height
= p
->orig_height
;
4821 XSETFASTINT (w
->last_modified
, 0);
4822 XSETFASTINT (w
->last_overlay_modified
, 0);
4824 /* Reinstall the saved buffer and pointers into it. */
4825 if (NILP (p
->buffer
))
4826 w
->buffer
= p
->buffer
;
4829 if (!NILP (XBUFFER (p
->buffer
)->name
))
4830 /* If saved buffer is alive, install it. */
4832 w
->buffer
= p
->buffer
;
4833 w
->start_at_line_beg
= p
->start_at_line_beg
;
4834 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
4835 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
4836 Fset_marker (XBUFFER (w
->buffer
)->mark
,
4837 p
->mark
, w
->buffer
);
4839 /* As documented in Fcurrent_window_configuration, don't
4840 save the location of point in the buffer which was current
4841 when the window configuration was recorded. */
4842 if (!EQ (p
->buffer
, new_current_buffer
)
4843 && XBUFFER (p
->buffer
) == current_buffer
)
4844 Fgoto_char (w
->pointm
);
4846 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
4847 /* Else unless window has a live buffer, get one. */
4849 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
4850 /* This will set the markers to beginning of visible
4852 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
4853 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
4854 w
->start_at_line_beg
= Qt
;
4857 /* Keeping window's old buffer; make sure the markers
4860 /* Set window markers at start of visible range. */
4861 if (XMARKER (w
->start
)->buffer
== 0)
4862 set_marker_restricted (w
->start
, make_number (0),
4864 if (XMARKER (w
->pointm
)->buffer
== 0)
4865 set_marker_restricted_both (w
->pointm
, w
->buffer
,
4866 BUF_PT (XBUFFER (w
->buffer
)),
4867 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4868 w
->start_at_line_beg
= Qt
;
4873 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
4874 /* Prevent "swapping out point" in the old selected window
4875 using the buffer that has been restored into it.
4876 That swapping out has already been done,
4877 near the beginning of this function. */
4878 selected_window
= Qnil
;
4879 Fselect_window (data
->current_window
);
4880 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
4883 if (NILP (data
->focus_frame
)
4884 || (FRAMEP (data
->focus_frame
)
4885 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
4886 Fredirect_frame_focus (frame
, data
->focus_frame
);
4888 #if 0 /* I don't understand why this is needed, and it causes problems
4889 when the frame's old selected window has been deleted. */
4890 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
4891 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
4895 /* Set the screen height to the value it had before this function. */
4896 if (previous_frame_height
!= FRAME_HEIGHT (f
)
4897 || previous_frame_width
!= FRAME_WIDTH (f
))
4898 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
4900 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4901 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
4902 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
4904 #ifdef HAVE_WINDOW_SYSTEM
4905 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
4906 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
4911 /* Now, free glyph matrices in windows that were not reused. */
4912 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
4914 if (NILP (leaf_windows
[i
]->buffer
))
4916 /* Assert it's not reused as a combination. */
4917 xassert (NILP (leaf_windows
[i
]->hchild
)
4918 && NILP (leaf_windows
[i
]->vchild
));
4919 free_window_matrices (leaf_windows
[i
]);
4920 SET_FRAME_GARBAGED (f
);
4922 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
4926 /* If more than one window shows the new and old current buffer,
4927 don't try to preserve point in that buffer. */
4928 if (old_point
> 0 && n
> 1)
4935 /* Fselect_window will have made f the selected frame, so we
4936 reselect the proper frame here. Fhandle_switch_frame will change the
4937 selected window too, but that doesn't make the call to
4938 Fselect_window above totally superfluous; it still sets f's
4940 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
4941 do_switch_frame (data
->selected_frame
, Qnil
, 0);
4943 if (! NILP (Vwindow_configuration_change_hook
)
4944 && ! NILP (Vrun_hooks
))
4945 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4948 if (!NILP (new_current_buffer
))
4950 Fset_buffer (new_current_buffer
);
4952 /* If the buffer that is current now is the same
4953 that was current before setting the window configuration,
4954 don't alter its PT. */
4959 /* Restore the minimum heights recorded in the configuration. */
4960 window_min_height
= XINT (data
->min_height
);
4961 window_min_width
= XINT (data
->min_width
);
4963 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
4965 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
4968 /* Mark all windows now on frame as deleted
4969 by setting their buffers to nil. */
4972 delete_all_subwindows (w
)
4973 register struct window
*w
;
4975 if (!NILP (w
->next
))
4976 delete_all_subwindows (XWINDOW (w
->next
));
4977 if (!NILP (w
->vchild
))
4978 delete_all_subwindows (XWINDOW (w
->vchild
));
4979 if (!NILP (w
->hchild
))
4980 delete_all_subwindows (XWINDOW (w
->hchild
));
4982 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
4984 if (!NILP (w
->buffer
))
4987 /* We set all three of these fields to nil, to make sure that we can
4988 distinguish this dead window from any live window. Live leaf
4989 windows will have buffer set, and combination windows will have
4990 vchild or hchild set. */
4995 Vwindow_list
= Qnil
;
4999 count_windows (window
)
5000 register struct window
*window
;
5002 register int count
= 1;
5003 if (!NILP (window
->next
))
5004 count
+= count_windows (XWINDOW (window
->next
));
5005 if (!NILP (window
->vchild
))
5006 count
+= count_windows (XWINDOW (window
->vchild
));
5007 if (!NILP (window
->hchild
))
5008 count
+= count_windows (XWINDOW (window
->hchild
));
5013 /* Fill vector FLAT with leaf windows under W, starting at index I.
5014 Value is last index + 1. */
5017 get_leaf_windows (w
, flat
, i
)
5019 struct window
**flat
;
5024 if (!NILP (w
->hchild
))
5025 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
5026 else if (!NILP (w
->vchild
))
5027 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
5031 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5038 /* Return a pointer to the glyph W's physical cursor is on. Value is
5039 null if W's current matrix is invalid, so that no meaningfull glyph
5043 get_phys_cursor_glyph (w
)
5046 struct glyph_row
*row
;
5047 struct glyph
*glyph
;
5049 if (w
->phys_cursor
.vpos
>= 0
5050 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
5051 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
5053 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
5054 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
5063 save_window_save (window
, vector
, i
)
5065 struct Lisp_Vector
*vector
;
5068 register struct saved_window
*p
;
5069 register struct window
*w
;
5070 register Lisp_Object tem
;
5072 for (;!NILP (window
); window
= w
->next
)
5074 p
= SAVED_WINDOW_N (vector
, i
);
5075 w
= XWINDOW (window
);
5077 XSETFASTINT (w
->temslot
, i
++);
5079 p
->buffer
= w
->buffer
;
5082 p
->width
= w
->width
;
5083 p
->height
= w
->height
;
5084 p
->hscroll
= w
->hscroll
;
5085 p
->display_table
= w
->display_table
;
5086 p
->orig_top
= w
->orig_top
;
5087 p
->orig_height
= w
->orig_height
;
5088 if (!NILP (w
->buffer
))
5090 /* Save w's value of point in the window configuration.
5091 If w is the selected window, then get the value of point
5092 from the buffer; pointm is garbage in the selected window. */
5093 if (EQ (window
, selected_window
))
5095 p
->pointm
= Fmake_marker ();
5096 set_marker_both (p
->pointm
, w
->buffer
,
5097 BUF_PT (XBUFFER (w
->buffer
)),
5098 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5101 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
5103 p
->start
= Fcopy_marker (w
->start
, Qnil
);
5104 p
->start_at_line_beg
= w
->start_at_line_beg
;
5106 tem
= XBUFFER (w
->buffer
)->mark
;
5107 p
->mark
= Fcopy_marker (tem
, Qnil
);
5114 p
->start_at_line_beg
= Qnil
;
5117 if (NILP (w
->parent
))
5120 p
->parent
= XWINDOW (w
->parent
)->temslot
;
5125 p
->prev
= XWINDOW (w
->prev
)->temslot
;
5127 if (!NILP (w
->vchild
))
5128 i
= save_window_save (w
->vchild
, vector
, i
);
5129 if (!NILP (w
->hchild
))
5130 i
= save_window_save (w
->hchild
, vector
, i
);
5136 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
5137 Scurrent_window_configuration
, 0, 1, 0,
5138 "Return an object representing the current window configuration of FRAME.\n\
5139 If FRAME is nil or omitted, use the selected frame.\n\
5140 This describes the number of windows, their sizes and current buffers,\n\
5141 and for each displayed buffer, where display starts, and the positions of\n\
5142 point and mark. An exception is made for point in the current buffer:\n\
5143 its value is -not- saved.\n\
5144 This also records the currently selected frame, and FRAME's focus\n\
5145 redirection (see `redirect-frame-focus').")
5149 register Lisp_Object tem
;
5150 register int n_windows
;
5151 register struct save_window_data
*data
;
5152 register struct Lisp_Vector
*vec
;
5157 frame
= selected_frame
;
5158 CHECK_LIVE_FRAME (frame
, 0);
5161 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5162 vec
= allocate_vectorlike (VECSIZE (struct save_window_data
));
5163 for (i
= 0; i
< VECSIZE (struct save_window_data
); i
++)
5164 vec
->contents
[i
] = Qnil
;
5165 vec
->size
= VECSIZE (struct save_window_data
);
5166 data
= (struct save_window_data
*)vec
;
5168 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
5169 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
5170 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
5171 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
5172 data
->selected_frame
= selected_frame
;
5173 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
5174 XSETBUFFER (data
->current_buffer
, current_buffer
);
5175 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
5176 data
->root_window
= FRAME_ROOT_WINDOW (f
);
5177 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
5178 XSETINT (data
->min_height
, window_min_height
);
5179 XSETINT (data
->min_width
, window_min_width
);
5180 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
5181 data
->saved_windows
= tem
;
5182 for (i
= 0; i
< n_windows
; i
++)
5183 XVECTOR (tem
)->contents
[i
]
5184 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
5185 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
5186 XSETWINDOW_CONFIGURATION (tem
, data
);
5190 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
5192 "Execute body, preserving window sizes and contents.\n\
5193 Restore which buffer appears in which window, where display starts,\n\
5194 and the value of point and mark for each window.\n\
5195 Also restore the choice of selected window.\n\
5196 Also restore which buffer is current.\n\
5197 Does not restore the value of point in current buffer.")
5201 register Lisp_Object val
;
5202 register int count
= specpdl_ptr
- specpdl
;
5204 record_unwind_protect (Fset_window_configuration
,
5205 Fcurrent_window_configuration (Qnil
));
5206 val
= Fprogn (args
);
5207 return unbind_to (count
, val
);
5211 /***********************************************************************
5213 ***********************************************************************/
5215 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
5217 "Set width of marginal areas of window WINDOW.\n\
5218 If window is nil, set margins of the currently selected window.\n\
5219 First parameter LEFT-WIDTH specifies the number of character\n\
5220 cells to reserve for the left marginal area. Second parameter\n\
5221 RIGHT-WIDTH does the same for the right marginal area.\n\
5222 A nil width parameter means no margin.")
5223 (window
, left
, right
)
5224 Lisp_Object window
, left
, right
;
5226 struct window
*w
= decode_window (window
);
5229 CHECK_NUMBER_OR_FLOAT (left
, 1);
5231 CHECK_NUMBER_OR_FLOAT (right
, 2);
5233 /* Check widths < 0 and translate a zero width to nil.
5234 Margins that are too wide have to be checked elsewhere. */
5235 if ((INTEGERP (left
) && XINT (left
) < 0)
5236 || (FLOATP (left
) && XFLOAT_DATA (left
) <= 0))
5237 XSETFASTINT (left
, 0);
5238 if (INTEGERP (left
) && XFASTINT (left
) == 0)
5241 if ((INTEGERP (right
) && XINT (right
) < 0)
5242 || (FLOATP (right
) && XFLOAT_DATA (right
) <= 0))
5243 XSETFASTINT (right
, 0);
5244 if (INTEGERP (right
) && XFASTINT (right
) == 0)
5247 w
->left_margin_width
= left
;
5248 w
->right_margin_width
= right
;
5250 ++windows_or_buffers_changed
;
5251 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
5256 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
5258 "Get width of marginal areas of window WINDOW.\n\
5259 If WINDOW is omitted or nil, use the currently selected window.\n\
5260 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).\n\
5261 If a marginal area does not exist, its width will be returned\n\
5266 struct window
*w
= decode_window (window
);
5267 return Fcons (w
->left_margin_width
, w
->right_margin_width
);
5272 /***********************************************************************
5274 ***********************************************************************/
5276 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 1, 0,
5277 "Return the amount by which WINDOW is scrolled vertically.\n\
5278 Use the selected window if WINDOW is nil or omitted.\n\
5279 Value is a multiple of the canonical character height of WINDOW.")
5288 window
= selected_window
;
5290 CHECK_WINDOW (window
, 0);
5291 w
= XWINDOW (window
);
5292 f
= XFRAME (w
->frame
);
5294 if (FRAME_WINDOW_P (f
))
5295 result
= CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
);
5297 result
= make_number (0);
5302 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
5304 "Set amount by which WINDOW should be scrolled vertically to VSCROLL.\n\
5305 WINDOW nil or omitted means use the selected window. VSCROLL is a\n\
5306 non-negative multiple of the canonical character height of WINDOW.")
5308 Lisp_Object window
, vscroll
;
5314 window
= selected_window
;
5316 CHECK_WINDOW (window
, 0);
5317 CHECK_NUMBER_OR_FLOAT (vscroll
, 1);
5319 w
= XWINDOW (window
);
5320 f
= XFRAME (w
->frame
);
5322 if (FRAME_WINDOW_P (f
))
5324 int old_dy
= w
->vscroll
;
5326 w
->vscroll
= - CANON_Y_UNIT (f
) * XFLOATINT (vscroll
);
5327 w
->vscroll
= min (w
->vscroll
, 0);
5329 /* Adjust glyph matrix of the frame if the virtual display
5330 area becomes larger than before. */
5331 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
5334 /* Prevent redisplay shortcuts. */
5335 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5338 return Fwindow_vscroll (window
);
5342 /* Call FN for all leaf windows on frame F. FN is called with the
5343 first argument being a pointer to the leaf window, and with
5344 additional argument USER_DATA. Stops when FN returns 0. */
5347 foreach_window (f
, fn
, user_data
)
5349 int (* fn
) P_ ((struct window
*, void *));
5352 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
5356 /* Helper function for foreach_window. Call FN for all leaf windows
5357 reachable from W. FN is called with the first argument being a
5358 pointer to the leaf window, and with additional argument USER_DATA.
5359 Stop when FN returns 0. Value is 0 if stopped by FN. */
5362 foreach_window_1 (w
, fn
, user_data
)
5364 int (* fn
) P_ ((struct window
*, void *));
5369 for (cont
= 1; w
&& cont
;)
5371 if (!NILP (w
->hchild
))
5372 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
5373 else if (!NILP (w
->vchild
))
5374 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
5376 cont
= fn (w
, user_data
);
5378 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5385 /* Freeze or unfreeze the window start of W if unless it is a
5386 mini-window or the selected window. FREEZE_P non-null means freeze
5387 the window start. */
5390 freeze_window_start (w
, freeze_p
)
5394 if (w
== XWINDOW (selected_window
)
5395 || MINI_WINDOW_P (w
)
5396 || (MINI_WINDOW_P (XWINDOW (selected_window
))
5397 && ! NILP (Vminibuf_scroll_window
)
5398 && w
== XWINDOW (Vminibuf_scroll_window
)))
5401 w
->frozen_window_start_p
= freeze_p
!= NULL
;
5406 /* Freeze or unfreeze the window starts of all leaf windows on frame
5407 F, except the selected window and a mini-window. FREEZE_P non-zero
5408 means freeze the window start. */
5411 freeze_window_starts (f
, freeze_p
)
5415 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
5419 /***********************************************************************
5421 ***********************************************************************/
5423 /* Return 1 if window configurations C1 and C2
5424 describe the same state of affairs. This is used by Fequal. */
5427 compare_window_configurations (c1
, c2
, ignore_positions
)
5429 int ignore_positions
;
5431 register struct save_window_data
*d1
, *d2
;
5432 struct Lisp_Vector
*sw1
, *sw2
;
5435 if (!WINDOW_CONFIGURATIONP (c1
))
5436 wrong_type_argument (Qwindow_configuration_p
, c1
);
5437 if (!WINDOW_CONFIGURATIONP (c2
))
5438 wrong_type_argument (Qwindow_configuration_p
, c2
);
5440 d1
= (struct save_window_data
*) XVECTOR (c1
);
5441 d2
= (struct save_window_data
*) XVECTOR (c2
);
5442 sw1
= XVECTOR (d1
->saved_windows
);
5443 sw2
= XVECTOR (d2
->saved_windows
);
5445 if (! EQ (d1
->frame_width
, d2
->frame_width
))
5447 if (! EQ (d1
->frame_height
, d2
->frame_height
))
5449 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
5451 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
5453 /* Don't compare the current_window field directly.
5454 Instead see w1_is_current and w2_is_current, below. */
5455 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
5457 if (! ignore_positions
)
5458 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
5460 /* Don't compare the root_window field.
5461 We don't require the two configurations
5462 to use the same window object,
5463 and the two root windows must be equivalent
5464 if everything else compares equal. */
5465 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
5467 if (! EQ (d1
->min_width
, d2
->min_width
))
5469 if (! EQ (d1
->min_height
, d2
->min_height
))
5472 /* Verify that the two confis have the same number of windows. */
5473 if (sw1
->size
!= sw2
->size
)
5476 for (i
= 0; i
< sw1
->size
; i
++)
5478 struct saved_window
*p1
, *p2
;
5479 int w1_is_current
, w2_is_current
;
5481 p1
= SAVED_WINDOW_N (sw1
, i
);
5482 p2
= SAVED_WINDOW_N (sw2
, i
);
5484 /* Verify that the current windows in the two
5485 configurations correspond to each other. */
5486 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
5487 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
5489 if (w1_is_current
!= w2_is_current
)
5492 /* Verify that the corresponding windows do match. */
5493 if (! EQ (p1
->buffer
, p2
->buffer
))
5495 if (! EQ (p1
->left
, p2
->left
))
5497 if (! EQ (p1
->top
, p2
->top
))
5499 if (! EQ (p1
->width
, p2
->width
))
5501 if (! EQ (p1
->height
, p2
->height
))
5503 if (! EQ (p1
->display_table
, p2
->display_table
))
5505 if (! EQ (p1
->parent
, p2
->parent
))
5507 if (! EQ (p1
->prev
, p2
->prev
))
5509 if (! ignore_positions
)
5511 if (! EQ (p1
->hscroll
, p2
->hscroll
))
5513 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
5515 if (NILP (Fequal (p1
->start
, p2
->start
)))
5517 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
5519 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
5527 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
5528 Scompare_window_configurations
, 2, 2, 0,
5529 "Compare two window configurations as regards the structure of windows.\n\
5530 This function ignores details such as the values of point and mark\n\
5531 and scrolling positions.")
5535 if (compare_window_configurations (x
, y
, 1))
5543 struct frame
*f
= make_terminal_frame ();
5544 XSETFRAME (selected_frame
, f
);
5545 Vterminal_frame
= selected_frame
;
5546 minibuf_window
= f
->minibuffer_window
;
5547 selected_window
= f
->selected_window
;
5548 last_nonminibuf_frame
= f
;
5550 window_initialized
= 1;
5556 Vwindow_list
= Qnil
;
5562 Qleft_bitmap_area
= intern ("left-bitmap-area");
5563 staticpro (&Qleft_bitmap_area
);
5564 Qright_bitmap_area
= intern ("right-bitmap-area");
5565 staticpro (&Qright_bitmap_area
);
5567 Qwindow_size_fixed
= intern ("window-size-fixed");
5568 staticpro (&Qwindow_size_fixed
);
5570 staticpro (&Qwindow_configuration_change_hook
);
5571 Qwindow_configuration_change_hook
5572 = intern ("window-configuration-change-hook");
5574 Qwindowp
= intern ("windowp");
5575 staticpro (&Qwindowp
);
5577 Qwindow_configuration_p
= intern ("window-configuration-p");
5578 staticpro (&Qwindow_configuration_p
);
5580 Qwindow_live_p
= intern ("window-live-p");
5581 staticpro (&Qwindow_live_p
);
5583 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
5584 staticpro (&Qtemp_buffer_show_hook
);
5586 staticpro (&Vwindow_list
);
5588 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
5589 "Non-nil means call as function to display a help buffer.\n\
5590 The function is called with one argument, the buffer to be displayed.\n\
5591 Used by `with-output-to-temp-buffer'.\n\
5592 If this function is used, then it must do the entire job of showing\n\
5593 the buffer; `temp-buffer-show-hook' is not run unless this function runs it.");
5594 Vtemp_buffer_show_function
= Qnil
;
5596 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
5597 "If non-nil, function to call to handle `display-buffer'.\n\
5598 It will receive two args, the buffer and a flag which if non-nil means\n\
5599 that the currently selected window is not acceptable.\n\
5600 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
5601 work using this function.");
5602 Vdisplay_buffer_function
= Qnil
;
5604 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
5605 "*If non-nil, `display-buffer' should even the window heights.\n\
5606 If nil, `display-buffer' will leave the window configuration alone.");
5607 Veven_window_heights
= Qt
;
5609 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
5610 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
5611 Vminibuf_scroll_window
= Qnil
;
5613 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
5614 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
5615 Vother_window_scroll_buffer
= Qnil
;
5617 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
5618 "*Non-nil means `display-buffer' should make a separate frame.");
5621 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
5622 "*Non-nil means `display-buffer' should reuse frames.\n\
5623 If the buffer in question is already displayed in a frame, raise that frame.");
5624 display_buffer_reuse_frames
= 0;
5626 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
5627 "Function to call to handle automatic new frame creation.\n\
5628 It is called with no arguments and should return a newly created frame.\n\
5630 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
5631 where `pop-up-frame-alist' would hold the default frame parameters.");
5632 Vpop_up_frame_function
= Qnil
;
5634 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
5635 "*List of buffer names that should have their own special frames.\n\
5636 Displaying a buffer whose name is in this list makes a special frame for it\n\
5637 using `special-display-function'. See also `special-display-regexps'.\n\
5639 An element of the list can be a list instead of just a string.\n\
5640 There are two ways to use a list as an element:\n\
5641 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\
5642 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5643 In the latter case, FUNCTION is called with BUFFER as the first argument,\n\
5644 followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\
5645 All this is done by the function found in `special-display-function'.\n\
5647 If this variable appears \"not to work\", because you add a name to it\n\
5648 but that buffer still appears in the selected window, look at the\n\
5649 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5650 Those variables take precedence over this one.");
5651 Vspecial_display_buffer_names
= Qnil
;
5653 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
5654 "*List of regexps saying which buffers should have their own special frames.\n\
5655 If a buffer name matches one of these regexps, it gets its own frame.\n\
5656 Displaying a buffer whose name is in this list makes a special frame for it\n\
5657 using `special-display-function'.\n\
5659 An element of the list can be a list instead of just a string.\n\
5660 There are two ways to use a list as an element:\n\
5661 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\
5662 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5663 In the latter case, FUNCTION is called with the buffer as first argument,\n\
5664 followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\
5665 All this is done by the function found in `special-display-function'.\n\
5667 If this variable appears \"not to work\", because you add a regexp to it\n\
5668 but the matching buffers still appear in the selected window, look at the\n\
5669 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5670 Those variables take precedence over this one.");
5671 Vspecial_display_regexps
= Qnil
;
5673 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
5674 "Function to call to make a new frame for a special buffer.\n\
5675 It is called with two arguments, the buffer and optional buffer specific\n\
5676 data, and should return a window displaying that buffer.\n\
5677 The default value makes a separate frame for the buffer,\n\
5678 using `special-display-frame-alist' to specify the frame parameters.\n\
5680 A buffer is special if its is listed in `special-display-buffer-names'\n\
5681 or matches a regexp in `special-display-regexps'.");
5682 Vspecial_display_function
= Qnil
;
5684 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
5685 "*List of buffer names that should appear in the selected window.\n\
5686 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\
5687 switches to it in the selected window, rather than making it appear\n\
5688 in some other window.\n\
5690 An element of the list can be a cons cell instead of just a string.\n\
5691 Then the car must be a string, which specifies the buffer name.\n\
5692 This is for compatibility with `special-display-buffer-names';\n\
5693 the cdr of the cons cell is ignored.\n\
5695 See also `same-window-regexps'.");
5696 Vsame_window_buffer_names
= Qnil
;
5698 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
5699 "*List of regexps saying which buffers should appear in the selected window.\n\
5700 If a buffer name matches one of these regexps, then displaying it\n\
5701 using `display-buffer' or `pop-to-buffer' switches to it\n\
5702 in the selected window, rather than making it appear in some other window.\n\
5704 An element of the list can be a cons cell instead of just a string.\n\
5705 Then the car must be a string, which specifies the buffer name.\n\
5706 This is for compatibility with `special-display-buffer-names';\n\
5707 the cdr of the cons cell is ignored.\n\
5709 See also `same-window-buffer-names'.");
5710 Vsame_window_regexps
= Qnil
;
5712 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
5713 "*Non-nil means display-buffer should make new windows.");
5716 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
5717 "*Number of lines of continuity when scrolling by screenfuls.");
5718 next_screen_context_lines
= 2;
5720 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
5721 "*display-buffer would prefer to split the largest window if this large.\n\
5722 If there is only one window, it is split regardless of this value.");
5723 split_height_threshold
= 500;
5725 DEFVAR_INT ("window-min-height", &window_min_height
,
5726 "*Delete any window less than this tall (including its mode line).");
5727 window_min_height
= 4;
5729 DEFVAR_INT ("window-min-width", &window_min_width
,
5730 "*Delete any window less than this wide.");
5731 window_min_width
= 10;
5733 DEFVAR_LISP ("scroll-preserve-screen-position",
5734 &Vscroll_preserve_screen_position
,
5735 "*Nonzero means scroll commands move point to keep its screen line unchanged.");
5736 Vscroll_preserve_screen_position
= Qnil
;
5738 DEFVAR_LISP ("window-configuration-change-hook",
5739 &Vwindow_configuration_change_hook
,
5740 "Functions to call when window configuration changes.\n\
5741 The selected frame is the one whose configuration has changed.");
5742 Vwindow_configuration_change_hook
= Qnil
;
5744 defsubr (&Sselected_window
);
5745 defsubr (&Sminibuffer_window
);
5746 defsubr (&Swindow_minibuffer_p
);
5747 defsubr (&Swindowp
);
5748 defsubr (&Swindow_live_p
);
5749 defsubr (&Spos_visible_in_window_p
);
5750 defsubr (&Swindow_buffer
);
5751 defsubr (&Swindow_height
);
5752 defsubr (&Swindow_width
);
5753 defsubr (&Swindow_hscroll
);
5754 defsubr (&Sset_window_hscroll
);
5755 defsubr (&Swindow_redisplay_end_trigger
);
5756 defsubr (&Sset_window_redisplay_end_trigger
);
5757 defsubr (&Swindow_edges
);
5758 defsubr (&Scoordinates_in_window_p
);
5759 defsubr (&Swindow_at
);
5760 defsubr (&Swindow_point
);
5761 defsubr (&Swindow_start
);
5762 defsubr (&Swindow_end
);
5763 defsubr (&Sset_window_point
);
5764 defsubr (&Sset_window_start
);
5765 defsubr (&Swindow_dedicated_p
);
5766 defsubr (&Sset_window_dedicated_p
);
5767 defsubr (&Swindow_display_table
);
5768 defsubr (&Sset_window_display_table
);
5769 defsubr (&Snext_window
);
5770 defsubr (&Sprevious_window
);
5771 defsubr (&Sother_window
);
5772 defsubr (&Sget_lru_window
);
5773 defsubr (&Sget_largest_window
);
5774 defsubr (&Sget_buffer_window
);
5775 defsubr (&Sdelete_other_windows
);
5776 defsubr (&Sdelete_windows_on
);
5777 defsubr (&Sreplace_buffer_in_windows
);
5778 defsubr (&Sdelete_window
);
5779 defsubr (&Sset_window_buffer
);
5780 defsubr (&Sselect_window
);
5781 defsubr (&Sspecial_display_p
);
5782 defsubr (&Ssame_window_p
);
5783 defsubr (&Sdisplay_buffer
);
5784 defsubr (&Ssplit_window
);
5785 defsubr (&Senlarge_window
);
5786 defsubr (&Sshrink_window
);
5787 defsubr (&Sscroll_up
);
5788 defsubr (&Sscroll_down
);
5789 defsubr (&Sscroll_left
);
5790 defsubr (&Sscroll_right
);
5791 defsubr (&Sother_window_for_scrolling
);
5792 defsubr (&Sscroll_other_window
);
5793 defsubr (&Srecenter
);
5794 defsubr (&Swindow_text_height
);
5795 defsubr (&Smove_to_window_line
);
5796 defsubr (&Swindow_configuration_p
);
5797 defsubr (&Swindow_configuration_frame
);
5798 defsubr (&Sset_window_configuration
);
5799 defsubr (&Scurrent_window_configuration
);
5800 defsubr (&Ssave_window_excursion
);
5801 defsubr (&Sset_window_margins
);
5802 defsubr (&Swindow_margins
);
5803 defsubr (&Swindow_vscroll
);
5804 defsubr (&Sset_window_vscroll
);
5805 defsubr (&Scompare_window_configurations
);
5806 defsubr (&Swindow_list
);
5812 initial_define_key (control_x_map
, '1', "delete-other-windows");
5813 initial_define_key (control_x_map
, '2', "split-window");
5814 initial_define_key (control_x_map
, '0', "delete-window");
5815 initial_define_key (control_x_map
, 'o', "other-window");
5816 initial_define_key (control_x_map
, '^', "enlarge-window");
5817 initial_define_key (control_x_map
, '<', "scroll-left");
5818 initial_define_key (control_x_map
, '>', "scroll-right");
5820 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
5821 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
5822 initial_define_key (meta_map
, 'v', "scroll-down");
5824 initial_define_key (global_map
, Ctl('L'), "recenter");
5825 initial_define_key (meta_map
, 'r', "move-to-window-line");