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, 2001
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 /* The value of `window-size-fixed'. */
87 int window_size_fixed
;
89 /* This is the window in which the terminal's cursor should
90 be left when nothing is being done with it. This must
91 always be a leaf window, and its buffer is selected by
92 the top level editing loop at the end of each command.
94 This value is always the same as
95 FRAME_SELECTED_WINDOW (selected_frame). */
97 Lisp_Object selected_window
;
99 /* A list of all windows for use by next_window and Fwindow_list.
100 Functions creating or deleting windows should invalidate this cache
101 by setting it to nil. */
103 Lisp_Object Vwindow_list
;
105 /* The mini-buffer window of the selected frame.
106 Note that you cannot test for mini-bufferness of an arbitrary window
107 by comparing against this; but you can test for mini-bufferness of
108 the selected window. */
110 Lisp_Object minibuf_window
;
112 /* Non-nil means it is the window for C-M-v to scroll
113 when the mini-buffer is selected. */
115 Lisp_Object Vminibuf_scroll_window
;
117 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
119 Lisp_Object Vother_window_scroll_buffer
;
121 /* Non-nil means it's function to call to display temp buffers. */
123 Lisp_Object Vtemp_buffer_show_function
;
125 /* If a window gets smaller than either of these, it is removed. */
127 int window_min_height
;
128 int window_min_width
;
130 /* Nonzero implies Fdisplay_buffer should create windows. */
134 /* Nonzero implies make new frames for Fdisplay_buffer. */
138 /* Nonzero means reuse existing frames for displaying buffers. */
140 int display_buffer_reuse_frames
;
142 /* Non-nil means use this function instead of default */
144 Lisp_Object Vpop_up_frame_function
;
146 /* Function to call to handle Fdisplay_buffer. */
148 Lisp_Object Vdisplay_buffer_function
;
150 /* Non-nil means that Fdisplay_buffer should even the heights of windows. */
152 Lisp_Object Veven_window_heights
;
154 /* List of buffer *names* for buffers that should have their own frames. */
156 Lisp_Object Vspecial_display_buffer_names
;
158 /* List of regexps for buffer names that should have their own frames. */
160 Lisp_Object Vspecial_display_regexps
;
162 /* Function to pop up a special frame. */
164 Lisp_Object Vspecial_display_function
;
166 /* List of buffer *names* for buffers to appear in selected window. */
168 Lisp_Object Vsame_window_buffer_names
;
170 /* List of regexps for buffer names to appear in selected window. */
172 Lisp_Object Vsame_window_regexps
;
174 /* Hook run at end of temp_output_buffer_show. */
176 Lisp_Object Qtemp_buffer_show_hook
;
178 /* Fdisplay_buffer always splits the largest window
179 if that window is more than this high. */
181 int split_height_threshold
;
183 /* Number of lines of continuity in scrolling by screenfuls. */
185 int next_screen_context_lines
;
187 /* Incremented for each window created. */
189 static int sequence_number
;
191 /* Nonzero after init_window_once has finished. */
193 static int window_initialized
;
195 /* Hook to run when window config changes. */
197 Lisp_Object Qwindow_configuration_change_hook
;
198 Lisp_Object Vwindow_configuration_change_hook
;
200 /* Nonzero means scroll commands try to put point
201 at the same screen height as previously. */
203 Lisp_Object Vscroll_preserve_screen_position
;
205 #if 0 /* This isn't used anywhere. */
206 /* Nonzero means we can split a frame even if it is "unsplittable". */
207 static int inhibit_frame_unsplittable
;
210 #define min(a, b) ((a) < (b) ? (a) : (b))
212 extern int scroll_margin
;
214 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
216 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
217 "Returns t if OBJECT is a window.")
221 return WINDOWP (object
) ? Qt
: Qnil
;
224 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
225 "Returns t if OBJECT is a window which is currently visible.")
229 return WINDOW_LIVE_P (object
) ? Qt
: Qnil
;
236 register struct window
*p
;
237 register struct Lisp_Vector
*vec
;
240 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct window
));
241 for (i
= 0; i
< VECSIZE (struct window
); i
++)
242 vec
->contents
[i
] = Qnil
;
243 vec
->size
= VECSIZE (struct window
);
244 p
= (struct window
*) vec
;
245 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
246 XSETFASTINT (p
->left
, 0);
247 XSETFASTINT (p
->top
, 0);
248 XSETFASTINT (p
->height
, 0);
249 XSETFASTINT (p
->width
, 0);
250 XSETFASTINT (p
->hscroll
, 0);
251 XSETFASTINT (p
->min_hscroll
, 0);
252 p
->orig_top
= p
->orig_height
= Qnil
;
253 p
->start
= Fmake_marker ();
254 p
->pointm
= Fmake_marker ();
255 XSETFASTINT (p
->use_time
, 0);
257 p
->display_table
= Qnil
;
259 p
->pseudo_window_p
= 0;
260 bzero (&p
->cursor
, sizeof (p
->cursor
));
261 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
262 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
263 p
->desired_matrix
= p
->current_matrix
= 0;
264 p
->phys_cursor_type
= -1;
265 p
->must_be_updated_p
= 0;
266 XSETFASTINT (p
->window_end_vpos
, 0);
267 XSETFASTINT (p
->window_end_pos
, 0);
268 p
->window_end_valid
= Qnil
;
271 XSETFASTINT (p
->last_point
, 0);
272 p
->frozen_window_start_p
= 0;
278 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
279 "Return the window that the cursor now appears in and commands apply to.")
282 return selected_window
;
285 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
286 "Return the window used now for minibuffers.\n\
287 If the optional argument FRAME is specified, return the minibuffer window\n\
288 used by that frame.")
293 frame
= selected_frame
;
294 CHECK_LIVE_FRAME (frame
, 0);
295 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
298 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
299 "Returns non-nil if WINDOW is a minibuffer window.")
303 struct window
*w
= decode_window (window
);
304 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
308 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
309 Spos_visible_in_window_p
, 0, 3, 0,
310 "Return t if position POS is currently on the frame in WINDOW.\n\
311 Return nil if that position is scrolled vertically out of view.\n\
312 If a character is only partially visible, nil is returned, unless the\n\
313 optional argument PARTIALLY is non-nil.\n\
314 POS defaults to point in WINDOW; WINDOW defaults to the selected window.")
315 (pos
, window
, partially
)
316 Lisp_Object pos
, window
, partially
;
318 register struct window
*w
;
320 register struct buffer
*buf
;
322 Lisp_Object in_window
;
325 w
= decode_window (window
);
326 buf
= XBUFFER (w
->buffer
);
327 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
331 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
334 else if (w
== XWINDOW (selected_window
))
337 posint
= XMARKER (w
->pointm
)->charpos
;
339 /* If position is above window start, it's not visible. */
340 if (posint
< CHARPOS (top
))
342 else if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
)
343 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (buf
)
344 && posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
))
346 /* If frame is up-to-date, and POSINT is < window end pos, use
347 that info. This doesn't work for POSINT == end pos, because
348 the window end pos is actually the position _after_ the last
349 char in the window. */
350 if (NILP (partially
))
352 pos_visible_p (w
, posint
, &fully_p
, NILP (partially
));
353 in_window
= fully_p
? Qt
: Qnil
;
358 else if (posint
> BUF_ZV (buf
))
360 else if (CHARPOS (top
) < BUF_BEGV (buf
) || CHARPOS (top
) > BUF_ZV (buf
))
361 /* If window start is out of range, do something reasonable. */
365 if (pos_visible_p (w
, posint
, &fully_p
, NILP (partially
)))
366 in_window
= !NILP (partially
) || fully_p
? Qt
: Qnil
;
375 static struct window
*
376 decode_window (window
)
377 register Lisp_Object window
;
380 return XWINDOW (selected_window
);
382 CHECK_LIVE_WINDOW (window
, 0);
383 return XWINDOW (window
);
386 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
387 "Return the buffer that WINDOW is displaying.")
391 return decode_window (window
)->buffer
;
394 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
395 "Return the number of lines in WINDOW (including its mode line).")
399 return decode_window (window
)->height
;
402 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
403 "Return the number of display columns in WINDOW.\n\
404 This is the width that is usable columns available for text in WINDOW.\n\
405 If you want to find out how many columns WINDOW takes up,\n\
406 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))).")
410 return make_number (window_internal_width (decode_window (window
)));
413 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
414 "Return the number of columns by which WINDOW is scrolled from left margin.")
418 return decode_window (window
)->hscroll
;
421 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
422 "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\
423 NCOL should be zero or positive.")
425 Lisp_Object window
, ncol
;
427 struct window
*w
= decode_window (window
);
430 CHECK_NUMBER (ncol
, 1);
431 hscroll
= max (0, XINT (ncol
));
433 /* Prevent redisplay shortcuts when changing the hscroll. */
434 if (XINT (w
->hscroll
) != hscroll
)
435 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
437 w
->hscroll
= make_number (hscroll
);
441 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
442 Swindow_redisplay_end_trigger
, 0, 1, 0,
443 "Return WINDOW's redisplay end trigger value.\n\
444 See `set-window-redisplay-end-trigger' for more information.")
448 return decode_window (window
)->redisplay_end_trigger
;
451 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
452 Sset_window_redisplay_end_trigger
, 2, 2, 0,
453 "Set WINDOW's redisplay end trigger value to VALUE.\n\
454 VALUE should be a buffer position (typically a marker) or nil.\n\
455 If it is a buffer position, then if redisplay in WINDOW reaches a position\n\
456 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called\n\
457 with two arguments: WINDOW, and the end trigger value.\n\
458 Afterwards the end-trigger value is reset to nil.")
460 register Lisp_Object window
, value
;
462 register struct window
*w
;
464 w
= decode_window (window
);
465 w
->redisplay_end_trigger
= value
;
469 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
470 "Return a list of the edge coordinates of WINDOW.\n\
471 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\
472 RIGHT is one more than the rightmost column used by WINDOW,\n\
473 and BOTTOM is one more than the bottommost row used by WINDOW\n\
478 register struct window
*w
= decode_window (window
);
480 return Fcons (w
->left
, Fcons (w
->top
,
481 Fcons (make_number (WINDOW_RIGHT_EDGE (w
)),
482 Fcons (make_number (XFASTINT (w
->top
)
483 + XFASTINT (w
->height
)),
487 /* Test if the character at column *X, row *Y is within window W.
488 If it is not, return 0;
489 if it is in the window's text area,
490 set *x and *y to its location relative to the upper left corner
493 if it is on the window's modeline, return 2;
494 if it is on the border between the window and its right sibling,
496 if it is on the window's top line, return 4;
497 if it is in the bitmap area to the left/right of the window,
498 return 5 or 6, and convert *X and *Y to window-relative corrdinates.
500 X and Y are frame relative pixel coordinates. */
503 coordinates_in_window (w
, x
, y
)
504 register struct window
*w
;
507 /* Let's make this a global enum later, instead of using numbers
509 enum {ON_NOTHING
, ON_TEXT
, ON_MODE_LINE
, ON_VERTICAL_BORDER
,
510 ON_HEADER_LINE
, ON_LEFT_FRINGE
, ON_RIGHT_FRINGE
};
512 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
513 int left_x
, right_x
, top_y
, bottom_y
;
514 int flags_area_width
= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
516 int ux
= CANON_X_UNIT (f
), uy
= CANON_Y_UNIT (f
);
517 int x0
= XFASTINT (w
->left
) * ux
;
518 int x1
= x0
+ XFASTINT (w
->width
) * ux
;
520 if (*x
< x0
|| *x
>= x1
)
523 /* In what's below, we subtract 1 when computing right_x because we
524 want the rightmost pixel, which is given by left_pixel+width-1. */
525 if (w
->pseudo_window_p
)
528 right_x
= XFASTINT (w
->width
) * CANON_X_UNIT (f
) - 1;
529 top_y
= WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
);
530 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
534 left_x
= (WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X (w
)
535 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
536 right_x
= WINDOW_DISPLAY_RIGHT_EDGE_PIXEL_X (w
) - 1;
537 top_y
= (WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
)
538 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
539 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
542 /* On the mode line or header line? If it's near the start of
543 the mode or header line of window that's has a horizontal
544 sibling, say it's on the vertical line. That's to be able
545 to resize windows horizontally in case we're using toolkit
548 if (WINDOW_WANTS_MODELINE_P (w
)
549 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
)
552 /* We're somewhere on the mode line. We consider the place
553 between mode lines of horizontally adjacent mode lines
554 as the vertical border. If scroll bars on the left,
555 return the right window. */
558 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
560 if (abs (*x
- x0
) < ux
/ 2)
561 part
= ON_VERTICAL_BORDER
;
563 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < ux
/ 2)
564 part
= ON_VERTICAL_BORDER
;
566 else if (WINDOW_WANTS_HEADER_LINE_P (w
)
567 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
)
570 part
= ON_HEADER_LINE
;
572 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f
))
574 if (abs (*x
- x0
) < ux
/ 2)
575 part
= ON_VERTICAL_BORDER
;
577 else if (!WINDOW_RIGHTMOST_P (w
) && abs (*x
- x1
) < ux
/ 2)
578 part
= ON_VERTICAL_BORDER
;
580 /* Outside anything interesting? */
585 - FRAME_LEFT_SCROLL_BAR_WIDTH (f
) * ux
)
586 || *x
> right_x
+ flags_area_width
)
590 else if (FRAME_WINDOW_P (f
))
592 if (!w
->pseudo_window_p
593 && !FRAME_HAS_VERTICAL_SCROLL_BARS (f
)
594 && !WINDOW_RIGHTMOST_P (w
)
595 && (abs (*x
- right_x
- flags_area_width
) < ux
/ 2))
597 part
= ON_VERTICAL_BORDER
;
599 else if (*x
< left_x
|| *x
> right_x
)
601 /* Other lines than the mode line don't include flags areas and
602 scroll bars on the left. */
604 /* Convert X and Y to window-relative pixel coordinates. */
607 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
618 /* Need to say "*x > right_x" rather than >=, since on character
619 terminals, the vertical line's x coordinate is right_x. */
620 if (*x
< left_x
|| *x
> right_x
)
622 /* Other lines than the mode line don't include flags areas and
623 scroll bars on the left. */
625 /* Convert X and Y to window-relative pixel coordinates. */
628 part
= *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
630 /* Here, too, "*x > right_x" is because of character terminals. */
631 else if (!w
->pseudo_window_p
632 && !WINDOW_RIGHTMOST_P (w
)
633 && *x
> right_x
- ux
)
635 /* On the border on the right side of the window? Assume that
636 this area begins at RIGHT_X minus a canonical char width. */
637 part
= ON_VERTICAL_BORDER
;
641 /* Convert X and Y to window-relative pixel coordinates. */
652 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
653 Scoordinates_in_window_p
, 2, 2, 0,
654 "Return non-nil if COORDINATES are in WINDOW.\n\
655 COORDINATES is a cons of the form (X . Y), X and Y being distances\n\
656 measured in characters from the upper-left corner of the frame.\n\
657 (0 . 0) denotes the character in the upper left corner of the\n\
659 If COORDINATES are in the text portion of WINDOW,\n\
660 the coordinates relative to the window are returned.\n\
661 If they are in the mode line of WINDOW, `mode-line' is returned.\n\
662 If they are in the top mode line of WINDOW, `header-line' is returned.\n\
663 If they are in the bitmap-area to the left of the window,\n\
664 `left-bitmap-area' is returned, if they are in the area on the right of\n\
665 the window, `right-bitmap-area' is returned.\n\
666 If they are on the border between WINDOW and its right sibling,\n\
667 `vertical-line' is returned.")
668 (coordinates
, window
)
669 register Lisp_Object coordinates
, window
;
676 CHECK_LIVE_WINDOW (window
, 0);
677 w
= XWINDOW (window
);
678 f
= XFRAME (w
->frame
);
679 CHECK_CONS (coordinates
, 1);
680 lx
= Fcar (coordinates
);
681 ly
= Fcdr (coordinates
);
682 CHECK_NUMBER_OR_FLOAT (lx
, 1);
683 CHECK_NUMBER_OR_FLOAT (ly
, 1);
684 x
= PIXEL_X_FROM_CANON_X (f
, lx
);
685 y
= PIXEL_Y_FROM_CANON_Y (f
, ly
);
687 switch (coordinates_in_window (w
, &x
, &y
))
689 case 0: /* NOT in window at all. */
692 case 1: /* In text part of window. */
693 /* X and Y are now window relative pixel coordinates.
694 Convert them to canonical char units before returning
696 return Fcons (CANON_X_FROM_PIXEL_X (f
, x
),
697 CANON_Y_FROM_PIXEL_Y (f
, y
));
699 case 2: /* In mode line of window. */
702 case 3: /* On right border of window. */
703 return Qvertical_line
;
709 return Qleft_bitmap_area
;
712 return Qright_bitmap_area
;
720 /* Callback for foreach_window, used in window_from_coordinates.
721 Check if window W contains coordinates specified by USER_DATA which
722 is actually a pointer to a struct check_window_data CW.
724 Check if window W contains coordinates *CW->x and *CW->y. If it
725 does, return W in *CW->window, as Lisp_Object, and return in
726 *CW->part the part of the window under coordinates *X,*Y. Return
727 zero from this function to stop iterating over windows. */
729 struct check_window_data
736 check_window_containing (w
, user_data
)
740 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
743 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
746 *cw
->part
= found
- 1;
747 XSETWINDOW (*cw
->window
, w
);
754 /* Find the window containing frame-relative pixel position X/Y and
755 return it as a Lisp_Object. If X, Y is on the window's modeline,
756 set *PART to 1; if it is on the separating line between the window
757 and its right sibling, set it to 2; otherwise set it to 0. If
758 there is no window under X, Y return nil and leave *PART
759 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
761 This function was previously implemented with a loop cycling over
762 windows with Fnext_window, and starting with the frame's selected
763 window. It turned out that this doesn't work with an
764 implementation of next_window using Vwindow_list, because
765 FRAME_SELECTED_WINDOW (F) is not always contained in the window
766 tree of F when this function is called asynchronously from
767 note_mouse_highlight. The original loop didn't terminate in this
771 window_from_coordinates (f
, x
, y
, part
, tool_bar_p
)
778 struct check_window_data cw
;
781 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
782 foreach_window (f
, check_window_containing
, &cw
);
784 /* If not found above, see if it's in the tool bar window, if a tool
788 && WINDOWP (f
->tool_bar_window
)
789 && XINT (XWINDOW (f
->tool_bar_window
)->height
) > 0
790 && coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
))
793 window
= f
->tool_bar_window
;
799 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
800 "Return window containing coordinates X and Y on FRAME.\n\
801 If omitted, FRAME defaults to the currently selected frame.\n\
802 The top left corner of the frame is considered to be row 0,\n\
805 Lisp_Object x
, y
, frame
;
811 frame
= selected_frame
;
812 CHECK_LIVE_FRAME (frame
, 2);
815 /* Check that arguments are integers or floats. */
816 CHECK_NUMBER_OR_FLOAT (x
, 0);
817 CHECK_NUMBER_OR_FLOAT (y
, 1);
819 return window_from_coordinates (f
,
820 PIXEL_X_FROM_CANON_X (f
, x
),
821 PIXEL_Y_FROM_CANON_Y (f
, y
),
825 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
826 "Return current value of point in WINDOW.\n\
827 For a nonselected window, this is the value point would have\n\
828 if that window were selected.\n\
830 Note that, when WINDOW is the selected window and its buffer\n\
831 is also currently selected, the value returned is the same as (point).\n\
832 It would be more strictly correct to return the `top-level' value\n\
833 of point, outside of any save-excursion forms.\n\
834 But that is hard to define.")
838 register struct window
*w
= decode_window (window
);
840 if (w
== XWINDOW (selected_window
)
841 && current_buffer
== XBUFFER (w
->buffer
))
843 return Fmarker_position (w
->pointm
);
846 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
847 "Return position at which display currently starts in WINDOW.\n\
848 This is updated by redisplay or by calling `set-window-start'.")
852 return Fmarker_position (decode_window (window
)->start
);
855 /* This is text temporarily removed from the doc string below.
857 This function returns nil if the position is not currently known.\n\
858 That happens when redisplay is preempted and doesn't finish.\n\
859 If in that case you want to compute where the end of the window would\n\
860 have been if redisplay had finished, do this:\n\
862 (goto-char (window-start window))\n\
863 (vertical-motion (1- (window-height window)) window)\n\
866 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
867 "Return position at which display currently ends in WINDOW.\n\
868 This is updated by redisplay, when it runs to completion.\n\
869 Simply changing the buffer text or setting `window-start'\n\
870 does not update this value.\n\
871 If UPDATE is non-nil, compute the up-to-date position\n\
872 if it isn't already recorded.")
874 Lisp_Object window
, update
;
877 struct window
*w
= decode_window (window
);
881 CHECK_BUFFER (buf
, 0);
883 #if 0 /* This change broke some things. We should make it later. */
884 /* If we don't know the end position, return nil.
885 The user can compute it with vertical-motion if he wants to.
886 It would be nicer to do it automatically,
887 but that's so slow that it would probably bother people. */
888 if (NILP (w
->window_end_valid
))
893 && ! (! NILP (w
->window_end_valid
)
894 && XFASTINT (w
->last_modified
) >= MODIFF
))
896 struct text_pos startp
;
899 /* In case W->start is out of the range, use something
900 reasonable. This situation occured when loading a file with
901 `-l' containing a call to `rmail' with subsequent other
902 commands. At the end, W->start happened to be BEG, while
903 rmail had already narrowed the buffer. */
904 if (XMARKER (w
->start
)->charpos
< BEGV
)
905 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
906 else if (XMARKER (w
->start
)->charpos
> ZV
)
907 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
909 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
911 /* Cannot use Fvertical_motion because that function doesn't
912 cope with variable-height lines. */
913 start_display (&it
, w
, startp
);
914 move_it_vertically (&it
, window_box_height (w
));
915 move_it_past_eol (&it
);
916 value
= make_number (IT_CHARPOS (it
));
919 XSETINT (value
, BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
924 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
925 "Make point value in WINDOW be at position POS in WINDOW's buffer.")
927 Lisp_Object window
, pos
;
929 register struct window
*w
= decode_window (window
);
931 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
932 if (w
== XWINDOW (selected_window
)
933 && XBUFFER (w
->buffer
) == current_buffer
)
936 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
938 /* We have to make sure that redisplay updates the window to show
939 the new value of point. */
940 if (!EQ (window
, selected_window
))
941 ++windows_or_buffers_changed
;
946 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
947 "Make display in WINDOW start at position POS in WINDOW's buffer.\n\
948 Optional third arg NOFORCE non-nil inhibits next redisplay\n\
949 from overriding motion of point in order to display at this exact start.")
950 (window
, pos
, noforce
)
951 Lisp_Object window
, pos
, noforce
;
953 register struct window
*w
= decode_window (window
);
955 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
956 set_marker_restricted (w
->start
, pos
, w
->buffer
);
957 /* this is not right, but much easier than doing what is right. */
958 w
->start_at_line_beg
= Qnil
;
961 w
->update_mode_line
= Qt
;
962 XSETFASTINT (w
->last_modified
, 0);
963 XSETFASTINT (w
->last_overlay_modified
, 0);
964 if (!EQ (window
, selected_window
))
965 windows_or_buffers_changed
++;
970 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
972 "Return WINDOW's dedicated object, usually t or nil.\n\
973 See also `set-window-dedicated-p'.")
977 return decode_window (window
)->dedicated
;
980 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
981 Sset_window_dedicated_p
, 2, 2, 0,
982 "Control whether WINDOW is dedicated to the buffer it displays.\n\
983 If it is dedicated, Emacs will not automatically change\n\
984 which buffer appears in it.\n\
985 The second argument is the new value for the dedication flag;\n\
988 Lisp_Object window
, arg
;
990 register struct window
*w
= decode_window (window
);
1000 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
1002 "Return the display-table that WINDOW is using.")
1006 return decode_window (window
)->display_table
;
1009 /* Get the display table for use on window W. This is either W's
1010 display table or W's buffer's display table. Ignore the specified
1011 tables if they are not valid; if no valid table is specified,
1014 struct Lisp_Char_Table
*
1015 window_display_table (w
)
1018 struct Lisp_Char_Table
*dp
= NULL
;
1020 if (DISP_TABLE_P (w
->display_table
))
1021 dp
= XCHAR_TABLE (w
->display_table
);
1022 else if (BUFFERP (w
->buffer
))
1024 struct buffer
*b
= XBUFFER (w
->buffer
);
1026 if (DISP_TABLE_P (b
->display_table
))
1027 dp
= XCHAR_TABLE (b
->display_table
);
1028 else if (DISP_TABLE_P (Vstandard_display_table
))
1029 dp
= XCHAR_TABLE (Vstandard_display_table
);
1035 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
1036 "Set WINDOW's display-table to TABLE.")
1038 register Lisp_Object window
, table
;
1040 register struct window
*w
;
1042 w
= decode_window (window
);
1043 w
->display_table
= table
;
1047 /* Record info on buffer window w is displaying
1048 when it is about to cease to display that buffer. */
1051 register struct window
*w
;
1058 if (b
!= XMARKER (w
->pointm
)->buffer
)
1062 if (w
== XWINDOW (selected_window
)
1063 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1064 /* Do this except when the selected window's buffer
1065 is being removed from some other window. */
1067 /* last_window_start records the start position that this buffer
1068 had in the last window to be disconnected from it.
1069 Now that this statement is unconditional,
1070 it is possible for the buffer to be displayed in the
1071 selected window, while last_window_start reflects another
1072 window which was recently showing the same buffer.
1073 Some people might say that might be a good thing. Let's see. */
1074 b
->last_window_start
= marker_position (w
->start
);
1076 /* Point in the selected window's buffer
1077 is actually stored in that buffer, and the window's pointm isn't used.
1078 So don't clobber point in that buffer. */
1079 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1080 /* This line helps to fix Horsley's testbug.el bug. */
1081 && !(WINDOWP (b
->last_selected_window
)
1082 && w
!= XWINDOW (b
->last_selected_window
)
1083 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1084 temp_set_point_both (b
,
1085 clip_to_bounds (BUF_BEGV (b
),
1086 XMARKER (w
->pointm
)->charpos
,
1088 clip_to_bounds (BUF_BEGV_BYTE (b
),
1089 marker_byte_position (w
->pointm
),
1092 if (WINDOWP (b
->last_selected_window
)
1093 && w
== XWINDOW (b
->last_selected_window
))
1094 b
->last_selected_window
= Qnil
;
1097 /* Put replacement into the window structure in place of old. */
1099 replace_window (old
, replacement
)
1100 Lisp_Object old
, replacement
;
1102 register Lisp_Object tem
;
1103 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1105 /* If OLD is its frame's root_window, then replacement is the new
1106 root_window for that frame. */
1108 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1109 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1113 p
->width
= o
->width
;
1114 p
->height
= o
->height
;
1115 p
->desired_matrix
= p
->current_matrix
= 0;
1117 bzero (&p
->cursor
, sizeof (p
->cursor
));
1118 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1119 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1120 p
->phys_cursor_type
= -1;
1121 p
->must_be_updated_p
= 0;
1122 p
->pseudo_window_p
= 0;
1123 XSETFASTINT (p
->window_end_vpos
, 0);
1124 XSETFASTINT (p
->window_end_pos
, 0);
1125 p
->window_end_valid
= Qnil
;
1126 p
->frozen_window_start_p
= 0;
1127 p
->orig_top
= p
->orig_height
= Qnil
;
1129 p
->next
= tem
= o
->next
;
1131 XWINDOW (tem
)->prev
= replacement
;
1133 p
->prev
= tem
= o
->prev
;
1135 XWINDOW (tem
)->next
= replacement
;
1137 p
->parent
= tem
= o
->parent
;
1140 if (EQ (XWINDOW (tem
)->vchild
, old
))
1141 XWINDOW (tem
)->vchild
= replacement
;
1142 if (EQ (XWINDOW (tem
)->hchild
, old
))
1143 XWINDOW (tem
)->hchild
= replacement
;
1146 /*** Here, if replacement is a vertical combination
1147 and so is its new parent, we should make replacement's
1148 children be children of that parent instead. ***/
1151 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1152 "Remove WINDOW from the display. Default is selected window.")
1154 register Lisp_Object window
;
1156 delete_window (window
);
1158 if (! NILP (Vwindow_configuration_change_hook
)
1159 && ! NILP (Vrun_hooks
))
1160 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1166 delete_window (window
)
1167 register Lisp_Object window
;
1169 register Lisp_Object tem
, parent
, sib
;
1170 register struct window
*p
;
1171 register struct window
*par
;
1174 /* Because this function is called by other C code on non-leaf
1175 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1176 so we can't decode_window here. */
1178 window
= selected_window
;
1180 CHECK_WINDOW (window
, 0);
1181 p
= XWINDOW (window
);
1183 /* It's okay to delete an already-deleted window. */
1184 if (NILP (p
->buffer
)
1186 && NILP (p
->vchild
))
1191 error ("Attempt to delete minibuffer or sole ordinary window");
1192 par
= XWINDOW (parent
);
1194 windows_or_buffers_changed
++;
1195 Vwindow_list
= Qnil
;
1196 f
= XFRAME (WINDOW_FRAME (p
));
1197 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
1199 /* Are we trying to delete any frame's selected window? */
1201 Lisp_Object pwindow
;
1203 /* See if the frame's selected window is either WINDOW
1204 or any subwindow of it, by finding all that window's parents
1205 and comparing each one with WINDOW. */
1206 pwindow
= FRAME_SELECTED_WINDOW (f
);
1208 while (!NILP (pwindow
))
1210 if (EQ (window
, pwindow
))
1212 pwindow
= XWINDOW (pwindow
)->parent
;
1215 if (EQ (window
, pwindow
))
1217 Lisp_Object alternative
;
1218 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
1220 /* If we're about to delete the selected window on the
1221 selected frame, then we should use Fselect_window to select
1222 the new window. On the other hand, if we're about to
1223 delete the selected window on any other frame, we shouldn't do
1224 anything but set the frame's selected_window slot. */
1225 if (EQ (window
, selected_window
))
1226 Fselect_window (alternative
);
1228 FRAME_SELECTED_WINDOW (f
) = alternative
;
1233 /* tem is null for dummy parent windows
1234 (which have inferiors but not any contents themselves) */
1238 unchain_marker (p
->pointm
);
1239 unchain_marker (p
->start
);
1242 /* Free window glyph matrices. It is sure that they are allocated
1243 again when ADJUST_GLYPHS is called. Block input so that expose
1244 events and other events that access glyph matrices are not
1245 processed while we are changing them. */
1247 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)));
1251 XWINDOW (tem
)->prev
= p
->prev
;
1255 XWINDOW (tem
)->next
= p
->next
;
1257 if (EQ (window
, par
->hchild
))
1258 par
->hchild
= p
->next
;
1259 if (EQ (window
, par
->vchild
))
1260 par
->vchild
= p
->next
;
1262 /* Find one of our siblings to give our space to. */
1266 /* If p gives its space to its next sibling, that sibling needs
1267 to have its top/left side pulled back to where p's is.
1268 set_window_{height,width} will re-position the sibling's
1271 XWINDOW (sib
)->top
= p
->top
;
1272 XWINDOW (sib
)->left
= p
->left
;
1275 /* Stretch that sibling. */
1276 if (!NILP (par
->vchild
))
1277 set_window_height (sib
,
1278 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
1280 if (!NILP (par
->hchild
))
1281 set_window_width (sib
,
1282 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
1285 /* If parent now has only one child,
1286 put the child into the parent's place. */
1290 if (NILP (XWINDOW (tem
)->next
))
1291 replace_window (parent
, tem
);
1293 /* Since we may be deleting combination windows, we must make sure that
1294 not only p but all its children have been marked as deleted. */
1295 if (! NILP (p
->hchild
))
1296 delete_all_subwindows (XWINDOW (p
->hchild
));
1297 else if (! NILP (p
->vchild
))
1298 delete_all_subwindows (XWINDOW (p
->vchild
));
1300 /* Mark this window as deleted. */
1301 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1303 /* Adjust glyph matrices. */
1310 /***********************************************************************
1312 ***********************************************************************/
1314 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1315 pointer. This is a callback function for foreach_window, used in
1316 function window_list. */
1319 add_window_to_list (w
, user_data
)
1323 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1325 XSETWINDOW (window
, w
);
1326 *list
= Fcons (window
, *list
);
1331 /* Return a list of all windows, for use by next_window. If
1332 Vwindow_list is a list, return that list. Otherwise, build a new
1333 list, cache it in Vwindow_list, and return that. */
1338 if (!CONSP (Vwindow_list
))
1342 Vwindow_list
= Qnil
;
1343 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1345 Lisp_Object args
[2];
1347 /* We are visiting windows in canonical order, and add
1348 new windows at the front of args[1], which means we
1349 have to reverse this list at the end. */
1351 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1352 args
[0] = Vwindow_list
;
1353 args
[1] = Fnreverse (args
[1]);
1354 Vwindow_list
= Fnconc (2, args
);
1358 return Vwindow_list
;
1362 /* Value is non-zero if WINDOW satisfies the constraints given by
1363 OWINDOW, MINIBUF and ALL_FRAMES.
1365 MINIBUF t means WINDOW may be minibuffer windows.
1366 `lambda' means WINDOW may not be a minibuffer window.
1367 a window means a specific minibuffer window
1369 ALL_FRAMES t means search all frames,
1370 nil means search just current frame,
1371 `visible' means search just visible frames,
1372 0 means search visible and iconified frames,
1373 a window means search the frame that window belongs to,
1374 a frame means consider windows on that frame, only. */
1377 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1378 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1380 struct window
*w
= XWINDOW (window
);
1381 struct frame
*f
= XFRAME (w
->frame
);
1382 int candidate_p
= 1;
1384 if (!BUFFERP (w
->buffer
))
1386 else if (MINI_WINDOW_P (w
)
1387 && (EQ (minibuf
, Qlambda
)
1388 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1390 /* If MINIBUF is `lambda' don't consider any mini-windows.
1391 If it is a window, consider only that one. */
1394 else if (EQ (all_frames
, Qt
))
1396 else if (NILP (all_frames
))
1398 xassert (WINDOWP (owindow
));
1399 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1401 else if (EQ (all_frames
, Qvisible
))
1403 FRAME_SAMPLE_VISIBILITY (f
);
1404 candidate_p
= FRAME_VISIBLE_P (f
);
1406 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1408 FRAME_SAMPLE_VISIBILITY (f
);
1409 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1411 else if (WINDOWP (all_frames
))
1412 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1413 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1414 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1415 else if (FRAMEP (all_frames
))
1416 candidate_p
= EQ (all_frames
, w
->frame
);
1422 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1423 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1427 decode_next_window_args (window
, minibuf
, all_frames
)
1428 Lisp_Object
*window
, *minibuf
, *all_frames
;
1431 *window
= selected_window
;
1433 CHECK_LIVE_WINDOW (*window
, 0);
1435 /* MINIBUF nil may or may not include minibuffers. Decide if it
1437 if (NILP (*minibuf
))
1438 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1439 else if (!EQ (*minibuf
, Qt
))
1442 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1443 => count none of them, or a specific minibuffer window (the
1444 active one) to count. */
1446 /* ALL_FRAMES nil doesn't specify which frames to include. */
1447 if (NILP (*all_frames
))
1448 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1449 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1451 else if (EQ (*all_frames
, Qvisible
))
1453 else if (XFASTINT (*all_frames
) == 0)
1455 else if (FRAMEP (*all_frames
))
1457 else if (!EQ (*all_frames
, Qt
))
1460 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1461 search just current frame, `visible' meaning search just visible
1462 frames, 0 meaning search visible and iconified frames, or a
1463 window, meaning search the frame that window belongs to, or a
1464 frame, meaning consider windows on that frame, only. */
1468 /* Return the next or previous window of WINDOW in canonical ordering
1469 of windows. NEXT_P non-zero means return the next window. See the
1470 documentation string of next-window for the meaning of MINIBUF and
1474 next_window (window
, minibuf
, all_frames
, next_p
)
1475 Lisp_Object window
, minibuf
, all_frames
;
1478 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1480 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1481 return the first window on the frame. */
1482 if (FRAMEP (all_frames
)
1483 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1484 return Fframe_first_window (all_frames
);
1490 /* Find WINDOW in the list of all windows. */
1491 list
= Fmemq (window
, window_list ());
1493 /* Scan forward from WINDOW to the end of the window list. */
1495 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1496 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1499 /* Scan from the start of the window list up to WINDOW. */
1501 for (list
= Vwindow_list
;
1502 CONSP (list
) && !EQ (XCAR (list
), window
);
1504 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1508 window
= XCAR (list
);
1512 Lisp_Object candidate
, list
;
1514 /* Scan through the list of windows for candidates. If there are
1515 candidate windows in front of WINDOW, the last one of these
1516 is the one we want. If there are candidates following WINDOW
1517 in the list, again the last one of these is the one we want. */
1519 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1521 if (EQ (XCAR (list
), window
))
1523 if (WINDOWP (candidate
))
1526 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1528 candidate
= XCAR (list
);
1531 if (WINDOWP (candidate
))
1539 /* This comment supplies the doc string for `next-window',
1540 for make-docfile to see. We cannot put this in the real DEFUN
1541 due to limits in the Unix cpp.
1543 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
1544 "Return next window after WINDOW in canonical ordering of windows.\n\
1545 If omitted, WINDOW defaults to the selected window.\n\
1547 Optional second arg MINIBUF t means count the minibuffer window even\n\
1548 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1549 it is active. MINIBUF neither t nor nil means not to count the\n\
1550 minibuffer even if it is active.\n\
1552 Several frames may share a single minibuffer; if the minibuffer\n\
1553 counts, all windows on all frames that share that minibuffer count\n\
1554 too. Therefore, `next-window' can be used to iterate through the\n\
1555 set of windows even when the minibuffer is on another frame. If the\n\
1556 minibuffer does not count, only windows from WINDOW's frame count.\n\
1558 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1559 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1560 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1561 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1562 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1563 Anything else means restrict to WINDOW's frame.\n\
1565 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1566 `next-window' to iterate through the entire cycle of acceptable\n\
1567 windows, eventually ending up back at the window you started with.\n\
1568 `previous-window' traverses the same cycle, in the reverse order.")
1569 (window, minibuf, all_frames) */
1571 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1573 (window
, minibuf
, all_frames
)
1574 Lisp_Object window
, minibuf
, all_frames
;
1576 return next_window (window
, minibuf
, all_frames
, 1);
1580 /* This comment supplies the doc string for `previous-window',
1581 for make-docfile to see. We cannot put this in the real DEFUN
1582 due to limits in the Unix cpp.
1584 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
1585 "Return the window preceding WINDOW in canonical ordering of windows.\n\
1586 If omitted, WINDOW defaults to the selected window.\n\
1588 Optional second arg MINIBUF t means count the minibuffer window even\n\
1589 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1590 it is active. MINIBUF neither t nor nil means not to count the\n\
1591 minibuffer even if it is active.\n\
1593 Several frames may share a single minibuffer; if the minibuffer\n\
1594 counts, all windows on all frames that share that minibuffer count\n\
1595 too. Therefore, `previous-window' can be used to iterate through\n\
1596 the set of windows even when the minibuffer is on another frame. If\n\
1597 the minibuffer does not count, only windows from WINDOW's frame count\n\
1599 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1600 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1601 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1602 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1603 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1604 Anything else means restrict to WINDOW's frame.\n\
1606 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1607 `previous-window' to iterate through the entire cycle of acceptable\n\
1608 windows, eventually ending up back at the window you started with.\n\
1609 `next-window' traverses the same cycle, in the reverse order.")
1610 (window, minibuf, all_frames) */
1613 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1615 (window
, minibuf
, all_frames
)
1616 Lisp_Object window
, minibuf
, all_frames
;
1618 return next_window (window
, minibuf
, all_frames
, 0);
1622 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1623 "Select the ARG'th different window on this frame.\n\
1624 All windows on current frame are arranged in a cyclic order.\n\
1625 This command selects the window ARG steps away in that order.\n\
1626 A negative ARG moves in the opposite order. If the optional second\n\
1627 argument ALL_FRAMES is non-nil, cycle through all frames.")
1629 Lisp_Object arg
, all_frames
;
1634 CHECK_NUMBER (arg
, 0);
1635 window
= selected_window
;
1637 for (i
= XINT (arg
); i
> 0; --i
)
1638 window
= Fnext_window (window
, Qnil
, all_frames
);
1640 window
= Fprevious_window (window
, Qnil
, all_frames
);
1642 Fselect_window (window
);
1647 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1648 "Return a list of windows on FRAME, starting with WINDOW.\n\
1649 FRAME nil or omitted means use the selected frame.\n\
1650 WINDOW nil or omitted means use the selected window.\n\
1651 MINIBUF t means include the minibuffer window, even if it isn't active.\n\
1652 MINIBUF nil or omitted means include the minibuffer window only\n\
1654 MINIBUF neither nil nor t means never include the minibuffer window.")
1655 (frame
, minibuf
, window
)
1656 Lisp_Object frame
, minibuf
, window
;
1660 window
= selected_window
;
1662 frame
= selected_frame
;
1664 if (!EQ (frame
, XWINDOW (window
)->frame
))
1665 error ("Window is on a different frame");
1667 return window_list_1 (window
, minibuf
, frame
);
1671 /* Return a list of windows in canonical ordering. Arguments are like
1672 for `next-window'. */
1675 window_list_1 (window
, minibuf
, all_frames
)
1676 Lisp_Object window
, minibuf
, all_frames
;
1678 Lisp_Object tail
, list
;
1680 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1683 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1684 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1685 list
= Fcons (XCAR (tail
), list
);
1687 return Fnreverse (list
);
1692 /* Look at all windows, performing an operation specified by TYPE
1694 If FRAMES is Qt, look at all frames;
1695 Qnil, look at just the selected frame;
1696 Qvisible, look at visible frames;
1697 a frame, just look at windows on that frame.
1698 If MINI is non-zero, perform the operation on minibuffer windows too. */
1703 GET_BUFFER_WINDOW
, /* Arg is buffer */
1704 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1705 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1706 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1708 UNSHOW_BUFFER
, /* Arg is buffer */
1713 window_loop (type
, obj
, mini
, frames
)
1714 enum window_loop type
;
1715 Lisp_Object obj
, frames
;
1718 Lisp_Object window
, windows
, best_window
, frame_arg
;
1720 struct gcpro gcpro1
;
1722 /* If we're only looping through windows on a particular frame,
1723 frame points to that frame. If we're looping through windows
1724 on all frames, frame is 0. */
1725 if (FRAMEP (frames
))
1726 f
= XFRAME (frames
);
1727 else if (NILP (frames
))
1728 f
= SELECTED_FRAME ();
1733 frame_arg
= Qlambda
;
1734 else if (XFASTINT (frames
) == 0)
1736 else if (EQ (frames
, Qvisible
))
1741 /* frame_arg is Qlambda to stick to one frame,
1742 Qvisible to consider all visible frames,
1745 /* Pick a window to start with. */
1749 window
= FRAME_SELECTED_WINDOW (f
);
1751 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1753 /* Figure out the last window we're going to mess with. Since
1754 Fnext_window, given the same options, is guaranteed to go in a
1755 ring, we can just use Fprevious_window to find the last one.
1757 We can't just wait until we hit the first window again, because
1758 it might be deleted. */
1760 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1764 for (; CONSP (windows
); windows
= CDR (windows
))
1768 window
= XCAR (windows
);
1769 w
= XWINDOW (window
);
1771 /* Note that we do not pay attention here to whether the frame
1772 is visible, since Fwindow_list skips non-visible frames if
1773 that is desired, under the control of frame_arg. */
1774 if (!MINI_WINDOW_P (w
)
1775 /* For UNSHOW_BUFFER, we must always consider all windows. */
1776 || type
== UNSHOW_BUFFER
1777 || (mini
&& minibuf_level
> 0))
1780 case GET_BUFFER_WINDOW
:
1781 if (EQ (w
->buffer
, obj
)
1782 /* Don't find any minibuffer window
1783 except the one that is currently in use. */
1784 && (MINI_WINDOW_P (w
)
1785 ? EQ (window
, minibuf_window
)
1793 case GET_LRU_WINDOW
:
1794 /* t as arg means consider only full-width windows */
1795 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
1797 /* Ignore dedicated windows and minibuffers. */
1798 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1800 if (NILP (best_window
)
1801 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1802 > XFASTINT (w
->use_time
)))
1803 best_window
= window
;
1806 case DELETE_OTHER_WINDOWS
:
1807 if (!EQ (window
, obj
))
1808 Fdelete_window (window
);
1811 case DELETE_BUFFER_WINDOWS
:
1812 if (EQ (w
->buffer
, obj
))
1814 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
1816 /* If this window is dedicated, and in a frame of its own,
1818 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1819 && !NILP (w
->dedicated
)
1820 && other_visible_frames (f
))
1822 /* Skip the other windows on this frame.
1823 There might be one, the minibuffer! */
1824 while (CONSP (XCDR (windows
))
1825 && EQ (XWINDOW (XCAR (windows
))->frame
,
1826 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1827 windows
= XCDR (windows
);
1829 /* Now we can safely delete the frame. */
1830 Fdelete_frame (w
->frame
, Qnil
);
1832 else if (NILP (w
->parent
))
1834 /* If we're deleting the buffer displayed in the
1835 only window on the frame, find a new buffer to
1838 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1840 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1841 Fset_window_buffer (window
, buffer
);
1842 if (EQ (window
, selected_window
))
1843 Fset_buffer (w
->buffer
);
1846 Fdelete_window (window
);
1850 case GET_LARGEST_WINDOW
:
1852 /* Ignore dedicated windows and minibuffers. */
1853 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1856 if (NILP (best_window
))
1857 best_window
= window
;
1860 struct window
*b
= XWINDOW (best_window
);
1861 if (XFASTINT (w
->height
) * XFASTINT (w
->width
)
1862 > XFASTINT (b
->height
) * XFASTINT (b
->width
))
1863 best_window
= window
;
1869 if (EQ (w
->buffer
, obj
))
1872 struct frame
*f
= XFRAME (w
->frame
);
1874 /* Find another buffer to show in this window. */
1875 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1877 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1879 /* If this window is dedicated, and in a frame of its own,
1881 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1882 && !NILP (w
->dedicated
)
1883 && other_visible_frames (f
))
1885 /* Skip the other windows on this frame.
1886 There might be one, the minibuffer! */
1887 while (CONSP (XCDR (windows
))
1888 && EQ (XWINDOW (XCAR (windows
))->frame
,
1889 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1890 windows
= XCDR (windows
);
1892 /* Now we can safely delete the frame. */
1893 Fdelete_frame (w
->frame
, Qnil
);
1897 /* Otherwise show a different buffer in the window. */
1898 w
->dedicated
= Qnil
;
1899 Fset_window_buffer (window
, buffer
);
1900 if (EQ (window
, selected_window
))
1901 Fset_buffer (w
->buffer
);
1906 /* Check for a window that has a killed buffer. */
1907 case CHECK_ALL_WINDOWS
:
1908 if (! NILP (w
->buffer
)
1909 && NILP (XBUFFER (w
->buffer
)->name
))
1913 case WINDOW_LOOP_UNUSED
:
1922 /* Used for debugging. Abort if any window has a dead buffer. */
1925 check_all_windows ()
1927 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
1930 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1931 "Return the window least recently selected or used for display.\n\
1932 If optional argument FRAME is `visible', search all visible frames.\n\
1933 If FRAME is 0, search all visible and iconified frames.\n\
1934 If FRAME is t, search all frames.\n\
1935 If FRAME is nil, search only the selected frame.\n\
1936 If FRAME is a frame, search only that frame.")
1940 register Lisp_Object w
;
1941 /* First try for a window that is full-width */
1942 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1943 if (!NILP (w
) && !EQ (w
, selected_window
))
1945 /* If none of them, try the rest */
1946 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1949 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1950 "Return the largest window in area.\n\
1951 If optional argument FRAME is `visible', search all visible frames.\n\
1952 If FRAME is 0, search all visible and iconified frames.\n\
1953 If FRAME is t, search all frames.\n\
1954 If FRAME is nil, search only the selected frame.\n\
1955 If FRAME is a frame, search only that frame.")
1959 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1963 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1964 "Return a window currently displaying BUFFER, or nil if none.\n\
1965 If optional argument FRAME is `visible', search all visible frames.\n\
1966 If optional argument FRAME is 0, search all visible and iconified frames.\n\
1967 If FRAME is t, search all frames.\n\
1968 If FRAME is nil, search only the selected frame.\n\
1969 If FRAME is a frame, search only that frame.")
1971 Lisp_Object buffer
, frame
;
1973 buffer
= Fget_buffer (buffer
);
1974 if (BUFFERP (buffer
))
1975 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1980 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1982 "Make WINDOW (or the selected window) fill its frame.\n\
1983 Only the frame WINDOW is on is affected.\n\
1984 This function tries to reduce display jumps\n\
1985 by keeping the text previously visible in WINDOW\n\
1986 in the same place on the frame. Doing this depends on\n\
1987 the value of (window-start WINDOW), so if calling this function\n\
1988 in a program gives strange scrolling, make sure the window-start\n\
1989 value is reasonable when this function is called.")
1998 window
= selected_window
;
2000 CHECK_LIVE_WINDOW (window
, 0);
2001 w
= XWINDOW (window
);
2003 startpos
= marker_position (w
->start
);
2004 top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2006 if (MINI_WINDOW_P (w
) && top
> 0)
2007 error ("Can't expand minibuffer to full frame");
2009 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
2011 /* Try to minimize scrolling, by setting the window start to the point
2012 will cause the text at the old window start to be at the same place
2013 on the frame. But don't try to do this if the window start is
2014 outside the visible portion (as might happen when the display is
2015 not current, due to typeahead). */
2016 new_top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
2018 && startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
2019 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
2021 struct position pos
;
2022 struct buffer
*obuf
= current_buffer
;
2024 Fset_buffer (w
->buffer
);
2025 /* This computation used to temporarily move point, but that can
2026 have unwanted side effects due to text properties. */
2027 pos
= *vmotion (startpos
, -top
, w
);
2029 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
2030 w
->window_end_valid
= Qnil
;
2031 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
2032 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
2034 /* We need to do this, so that the window-scroll-functions
2036 w
->optional_new_start
= Qt
;
2038 set_buffer_internal (obuf
);
2044 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2045 1, 2, "bDelete windows on (buffer): ",
2046 "Delete all windows showing BUFFER.\n\
2047 Optional second argument FRAME controls which frames are affected.\n\
2048 If optional argument FRAME is `visible', search all visible frames.\n\
2049 If FRAME is 0, search all visible and iconified frames.\n\
2050 If FRAME is nil, search all frames.\n\
2051 If FRAME is t, search only the selected frame.\n\
2052 If FRAME is a frame, search only that frame.")
2054 Lisp_Object buffer
, frame
;
2056 /* FRAME uses t and nil to mean the opposite of what window_loop
2060 else if (EQ (frame
, Qt
))
2065 buffer
= Fget_buffer (buffer
);
2066 CHECK_BUFFER (buffer
, 0);
2067 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2073 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2074 Sreplace_buffer_in_windows
,
2075 1, 1, "bReplace buffer in windows: ",
2076 "Replace BUFFER with some other buffer in all windows showing it.")
2082 buffer
= Fget_buffer (buffer
);
2083 CHECK_BUFFER (buffer
, 0);
2084 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2089 /* Replace BUFFER with some other buffer in all windows
2090 of all frames, even those on other keyboards. */
2093 replace_buffer_in_all_windows (buffer
)
2097 Lisp_Object tail
, frame
;
2099 /* A single call to window_loop won't do the job
2100 because it only considers frames on the current keyboard.
2101 So loop manually over frames, and handle each one. */
2102 FOR_EACH_FRAME (tail
, frame
)
2103 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2105 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2109 /* Set the height of WINDOW and all its inferiors. */
2111 /* The smallest acceptable dimensions for a window. Anything smaller
2112 might crash Emacs. */
2114 #define MIN_SAFE_WINDOW_WIDTH (2)
2115 #define MIN_SAFE_WINDOW_HEIGHT (2)
2117 /* Make sure that window_min_height and window_min_width are
2118 not too small; if they are, set them to safe minima. */
2121 check_min_window_sizes ()
2123 /* Smaller values might permit a crash. */
2124 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2125 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2126 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2127 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2130 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2131 minimum allowable size. */
2134 check_frame_size (frame
, rows
, cols
)
2138 /* For height, we have to see:
2139 whether the frame has a minibuffer,
2140 whether it wants a mode line, and
2141 whether it has a menu bar. */
2143 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
2144 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
2145 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
2147 if (FRAME_TOP_MARGIN (frame
) > 0)
2148 min_height
+= FRAME_TOP_MARGIN (frame
);
2150 if (*rows
< min_height
)
2152 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2153 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2157 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2158 check if W's width can be changed, otherwise check W's height.
2159 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2160 siblings, too. If none of the siblings is resizable, WINDOW isn't
2164 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2166 int width_p
, check_siblings_p
;
2171 if (!NILP (w
->hchild
))
2173 c
= XWINDOW (w
->hchild
);
2177 /* A horiz. combination is fixed-width if all 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
;
2185 /* A horiz. combination is fixed-height if one of if its
2187 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2188 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2189 fixed_p
= c
!= NULL
;
2192 else if (!NILP (w
->vchild
))
2194 c
= XWINDOW (w
->vchild
);
2198 /* A vert. combination is fixed-width if one 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
;
2206 /* A vert. combination is fixed-height if all of if its
2208 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2209 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2210 fixed_p
= c
== NULL
;
2213 else if (BUFFERP (w
->buffer
))
2215 if (w
->height_fixed_p
&& !width_p
)
2219 struct buffer
*old
= current_buffer
;
2222 current_buffer
= XBUFFER (w
->buffer
);
2223 val
= find_symbol_value (Qwindow_size_fixed
);
2224 current_buffer
= old
;
2227 if (!EQ (val
, Qunbound
))
2229 fixed_p
= !NILP (val
);
2232 && ((EQ (val
, Qheight
) && width_p
)
2233 || (EQ (val
, Qwidth
) && !width_p
)))
2238 /* Can't tell if this one is resizable without looking at
2239 siblings. If all siblings are fixed-size this one is too. */
2240 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2244 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2245 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2249 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2250 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2264 /* Return the minimum size of window W, not taking fixed-width windows
2265 into account. WIDTH_P non-zero means return the minimum width,
2266 otherwise return the minimum height. If W is a combination window,
2267 compute the minimum size from the minimum sizes of W's children. */
2270 window_min_size_1 (w
, width_p
)
2277 if (!NILP (w
->hchild
))
2279 c
= XWINDOW (w
->hchild
);
2284 /* The min width of a horizontal combination is
2285 the sum of the min widths of its children. */
2288 size
+= window_min_size_1 (c
, width_p
);
2289 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2294 /* The min height a horizontal combination equals
2295 the maximum of all min height of its children. */
2298 int min_size
= window_min_size_1 (c
, width_p
);
2299 size
= max (min_size
, size
);
2300 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2304 else if (!NILP (w
->vchild
))
2306 c
= XWINDOW (w
->vchild
);
2311 /* The min width of a vertical combination is
2312 the maximum of the min widths of its children. */
2315 int min_size
= window_min_size_1 (c
, width_p
);
2316 size
= max (min_size
, size
);
2317 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2322 /* The min height of a vertical combination equals
2323 the sum of the min height of its children. */
2326 size
+= window_min_size_1 (c
, width_p
);
2327 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2334 size
= window_min_width
;
2337 if (MINI_WINDOW_P (w
)
2338 || (!WINDOW_WANTS_MODELINE_P (w
)
2339 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2342 size
= window_min_height
;
2350 /* Return the minimum size of window W, taking fixed-size windows into
2351 account. WIDTH_P non-zero means return the minimum width,
2352 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2353 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2354 unless FIXED is null. */
2357 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2359 int width_p
, ignore_fixed_p
, *fixed
;
2366 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2372 size
= width_p
? XFASTINT (w
->width
) : XFASTINT (w
->height
);
2374 size
= window_min_size_1 (w
, width_p
);
2380 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2381 WINDOW's width. Resize WINDOW's children, if any, so that they
2382 keep their proportionate size relative to WINDOW. Propagate
2383 WINDOW's top or left edge position to children. Delete windows
2384 that become too small unless NODELETE_P is non-zero. */
2387 size_window (window
, size
, width_p
, nodelete_p
)
2389 int size
, width_p
, nodelete_p
;
2391 struct window
*w
= XWINDOW (window
);
2393 Lisp_Object child
, *forward
, *sideward
;
2394 int old_size
, min_size
;
2396 check_min_window_sizes ();
2397 size
= max (0, size
);
2399 /* If the window has been "too small" at one point,
2400 don't delete it for being "too small" in the future.
2401 Preserve it as long as that is at all possible. */
2404 old_size
= XINT (w
->width
);
2405 min_size
= window_min_width
;
2409 old_size
= XINT (w
->height
);
2410 min_size
= window_min_height
;
2413 if (old_size
< min_size
)
2414 w
->too_small_ok
= Qt
;
2416 /* Maybe delete WINDOW if it's too small. */
2417 if (!nodelete_p
&& !NILP (w
->parent
))
2419 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2420 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2422 min_size
= width_p
? window_min_width
: window_min_height
;
2424 if (size
< min_size
)
2426 delete_window (window
);
2431 /* Set redisplay hints. */
2432 w
->last_modified
= make_number (0);
2433 w
->last_overlay_modified
= make_number (0);
2434 windows_or_buffers_changed
++;
2435 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2439 sideward
= &w
->vchild
;
2440 forward
= &w
->hchild
;
2441 w
->width
= make_number (size
);
2445 sideward
= &w
->hchild
;
2446 forward
= &w
->vchild
;
2447 w
->height
= make_number (size
);
2450 if (!NILP (*sideward
))
2452 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2454 c
= XWINDOW (child
);
2459 size_window (child
, size
, width_p
, nodelete_p
);
2462 else if (!NILP (*forward
))
2464 int fixed_size
, each
, extra
, n
;
2465 int resize_fixed_p
, nfixed
;
2466 int last_pos
, first_pos
, nchildren
, total
;
2468 /* Determine the fixed-size portion of the this window, and the
2469 number of child windows. */
2470 fixed_size
= nchildren
= nfixed
= total
= 0;
2471 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2475 c
= XWINDOW (child
);
2476 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2477 total
+= child_size
;
2479 if (window_fixed_size_p (c
, width_p
, 0))
2481 fixed_size
+= child_size
;
2486 /* If the new size is smaller than fixed_size, or if there
2487 aren't any resizable windows, allow resizing fixed-size
2489 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2491 /* Compute how many lines/columns to add to each child. The
2492 value of extra takes care of rounding errors. */
2493 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2494 each
= (size
- total
) / n
;
2495 extra
= (size
- total
) - n
* each
;
2497 /* Compute new children heights and edge positions. */
2498 first_pos
= width_p
? XINT (w
->left
) : XINT (w
->top
);
2499 last_pos
= first_pos
;
2500 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2502 int new_size
, old_size
;
2504 c
= XWINDOW (child
);
2505 old_size
= width_p
? XFASTINT (c
->width
) : XFASTINT (c
->height
);
2506 new_size
= old_size
;
2508 /* The top or left edge position of this child equals the
2509 bottom or right edge of its predecessor. */
2511 c
->left
= make_number (last_pos
);
2513 c
->top
= make_number (last_pos
);
2515 /* If this child can be resized, do it. */
2516 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2518 new_size
= old_size
+ each
+ extra
;
2522 /* Set new height. Note that size_window also propagates
2523 edge positions to children, so it's not a no-op if we
2524 didn't change the child's size. */
2525 size_window (child
, new_size
, width_p
, 1);
2527 /* Remember the bottom/right edge position of this child; it
2528 will be used to set the top/left edge of the next child. */
2529 last_pos
+= new_size
;
2532 /* We should have covered the parent exactly with child windows. */
2533 xassert (size
== last_pos
- first_pos
);
2535 /* Now delete any children that became too small. */
2537 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2540 c
= XWINDOW (child
);
2541 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2542 size_window (child
, child_size
, width_p
, 0);
2547 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2548 WINDOW's children. NODELETE non-zero means don't delete windows
2549 that become too small in the process. (The caller should check
2550 later and do so if appropriate.) */
2553 set_window_height (window
, height
, nodelete
)
2558 size_window (window
, height
, 0, nodelete
);
2562 /* Set WINDOW's width to WIDTH, and recursively change the width of
2563 WINDOW's children. NODELETE non-zero means don't delete windows
2564 that become too small in the process. (The caller should check
2565 later and do so if appropriate.) */
2568 set_window_width (window
, width
, nodelete
)
2573 size_window (window
, width
, 1, nodelete
);
2577 int window_select_count
;
2580 Fset_window_buffer_unwind (obuf
)
2588 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
2589 means it's allowed to run hooks. See make_frame for a case where
2590 it's not allowed. */
2593 set_window_buffer (window
, buffer
, run_hooks_p
)
2594 Lisp_Object window
, buffer
;
2597 struct window
*w
= XWINDOW (window
);
2598 struct buffer
*b
= XBUFFER (buffer
);
2599 int count
= specpdl_ptr
- specpdl
;
2603 if (EQ (window
, selected_window
))
2604 b
->last_selected_window
= window
;
2606 /* Update time stamps of buffer display. */
2607 if (INTEGERP (b
->display_count
))
2608 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
2609 b
->display_time
= Fcurrent_time ();
2611 XSETFASTINT (w
->window_end_pos
, 0);
2612 XSETFASTINT (w
->window_end_vpos
, 0);
2613 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
2614 w
->window_end_valid
= Qnil
;
2615 XSETFASTINT (w
->hscroll
, 0);
2616 XSETFASTINT (w
->min_hscroll
, 0);
2617 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
2618 set_marker_restricted (w
->start
,
2619 make_number (b
->last_window_start
),
2621 w
->start_at_line_beg
= Qnil
;
2622 w
->force_start
= Qnil
;
2623 XSETFASTINT (w
->last_modified
, 0);
2624 XSETFASTINT (w
->last_overlay_modified
, 0);
2625 windows_or_buffers_changed
++;
2627 /* We must select BUFFER for running the window-scroll-functions.
2628 If WINDOW is selected, switch permanently.
2629 Otherwise, switch but go back to the ambient buffer afterward. */
2630 if (EQ (window
, selected_window
))
2631 Fset_buffer (buffer
);
2632 /* We can't check ! NILP (Vwindow_scroll_functions) here
2633 because that might itself be a local variable. */
2634 else if (window_initialized
)
2636 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
2637 Fset_buffer (buffer
);
2640 /* Set left and right marginal area width from buffer. */
2641 Fset_window_margins (window
, b
->left_margin_width
, b
->right_margin_width
);
2645 if (! NILP (Vwindow_scroll_functions
))
2646 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2647 Fmarker_position (w
->start
));
2649 if (! NILP (Vwindow_configuration_change_hook
)
2650 && ! NILP (Vrun_hooks
))
2651 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2654 unbind_to (count
, Qnil
);
2658 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
2659 "Make WINDOW display BUFFER as its contents.\n\
2660 BUFFER can be a buffer or buffer name.")
2662 register Lisp_Object window
, buffer
;
2664 register Lisp_Object tem
;
2665 register struct window
*w
= decode_window (window
);
2667 XSETWINDOW (window
, w
);
2668 buffer
= Fget_buffer (buffer
);
2669 CHECK_BUFFER (buffer
, 1);
2671 if (NILP (XBUFFER (buffer
)->name
))
2672 error ("Attempt to display deleted buffer");
2676 error ("Window is deleted");
2677 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
2678 is first being set up. */
2680 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
2681 error ("Window is dedicated to `%s'",
2682 XSTRING (XBUFFER (tem
)->name
)->data
);
2687 set_window_buffer (window
, buffer
, 1);
2691 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
2692 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
2693 If WINDOW is not already selected, also make WINDOW's buffer current.\n\
2694 Note that the main editor command loop\n\
2695 selects the buffer of the selected window before each command.")
2697 register Lisp_Object window
;
2699 return select_window_1 (window
, 1);
2702 /* Note that selected_window can be nil
2703 when this is called from Fset_window_configuration. */
2706 select_window_1 (window
, recordflag
)
2707 register Lisp_Object window
;
2710 register struct window
*w
;
2711 register struct window
*ow
;
2714 CHECK_LIVE_WINDOW (window
, 0);
2716 w
= XWINDOW (window
);
2718 if (NILP (w
->buffer
))
2719 error ("Trying to select deleted window or non-leaf window");
2721 XSETFASTINT (w
->use_time
, ++window_select_count
);
2722 if (EQ (window
, selected_window
))
2725 if (!NILP (selected_window
))
2727 ow
= XWINDOW (selected_window
);
2728 if (! NILP (ow
->buffer
))
2729 set_marker_both (ow
->pointm
, ow
->buffer
,
2730 BUF_PT (XBUFFER (ow
->buffer
)),
2731 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
2734 selected_window
= window
;
2735 sf
= SELECTED_FRAME ();
2736 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
2738 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
2739 /* Use this rather than Fhandle_switch_frame
2740 so that FRAME_FOCUS_FRAME is moved appropriately as we
2741 move around in the state where a minibuffer in a separate
2743 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
2746 sf
->selected_window
= window
;
2749 record_buffer (w
->buffer
);
2750 Fset_buffer (w
->buffer
);
2752 XBUFFER (w
->buffer
)->last_selected_window
= window
;
2754 /* Go to the point recorded in the window.
2755 This is important when the buffer is in more
2756 than one window. It also matters when
2757 redisplay_window has altered point after scrolling,
2758 because it makes the change only in the window. */
2760 register int new_point
= marker_position (w
->pointm
);
2761 if (new_point
< BEGV
)
2763 else if (new_point
> ZV
)
2769 windows_or_buffers_changed
++;
2773 /* Deiconify the frame containing the window WINDOW,
2774 unless it is the selected frame;
2777 The reason for the exception for the selected frame
2778 is that it seems better not to change the selected frames visibility
2779 merely because of displaying a different buffer in it.
2780 The deiconification is useful when a buffer gets shown in
2781 another frame that you were not using lately. */
2784 display_buffer_1 (window
)
2787 Lisp_Object frame
= XWINDOW (window
)->frame
;
2788 FRAME_PTR f
= XFRAME (frame
);
2790 FRAME_SAMPLE_VISIBILITY (f
);
2792 if (!EQ (frame
, selected_frame
))
2794 if (FRAME_ICONIFIED_P (f
))
2795 Fmake_frame_visible (frame
);
2796 else if (FRAME_VISIBLE_P (f
))
2797 Fraise_frame (frame
);
2803 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2804 "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\
2805 The value is actually t if the frame should be called with default frame\n\
2806 parameters, and a list of frame parameters if they were specified.\n\
2807 See `special-display-buffer-names', and `special-display-regexps'.")
2809 Lisp_Object buffer_name
;
2813 CHECK_STRING (buffer_name
, 1);
2815 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2819 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2823 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2825 Lisp_Object car
= XCAR (tem
);
2827 && fast_string_match (car
, buffer_name
) >= 0)
2829 else if (CONSP (car
)
2830 && STRINGP (XCAR (car
))
2831 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2837 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2838 "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\
2839 See `same-window-buffer-names' and `same-window-regexps'.")
2841 Lisp_Object buffer_name
;
2845 CHECK_STRING (buffer_name
, 1);
2847 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2851 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2855 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2857 Lisp_Object car
= XCAR (tem
);
2859 && fast_string_match (car
, buffer_name
) >= 0)
2861 else if (CONSP (car
)
2862 && STRINGP (XCAR (car
))
2863 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2869 /* Use B so the default is (other-buffer). */
2870 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
2871 "BDisplay buffer: \nP",
2872 "Make BUFFER appear in some window but don't select it.\n\
2873 BUFFER can be a buffer or a buffer name.\n\
2874 If BUFFER is shown already in some window, just use that one,\n\
2875 unless the window is the selected window and the optional second\n\
2876 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
2877 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
2878 Returns the window displaying BUFFER.\n\
2879 If `display-reuse-frames' is non-nil, and another frame is currently\n\
2880 displaying BUFFER, then simply raise that frame.\n\
2882 The variables `special-display-buffer-names', `special-display-regexps',\n\
2883 `same-window-buffer-names', and `same-window-regexps' customize how certain\n\
2884 buffer names are handled.\n\
2886 If optional argument FRAME is `visible', search all visible frames.\n\
2887 If FRAME is 0, search all visible and iconified frames.\n\
2888 If FRAME is t, search all frames.\n\
2889 If FRAME is a frame, search only that frame.\n\
2890 If FRAME is nil, search only the selected frame\n\
2891 (actually the last nonminibuffer frame),\n\
2892 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,\n\
2893 which means search visible and iconified frames.\n\
2895 If `even-window-heights' is non-nil, window heights will be evened out\n\
2896 if displaying the buffer causes two vertically adjacent windows to be\n\
2898 (buffer
, not_this_window
, frame
)
2899 register Lisp_Object buffer
, not_this_window
, frame
;
2901 register Lisp_Object window
, tem
, swp
;
2905 buffer
= Fget_buffer (buffer
);
2906 CHECK_BUFFER (buffer
, 0);
2908 if (!NILP (Vdisplay_buffer_function
))
2909 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2911 if (NILP (not_this_window
)
2912 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2913 return display_buffer_1 (selected_window
);
2915 /* See if the user has specified this buffer should appear
2916 in the selected window. */
2917 if (NILP (not_this_window
))
2919 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
2920 if (!NILP (swp
) && !no_switch_window (selected_window
))
2922 Fswitch_to_buffer (buffer
, Qnil
);
2923 return display_buffer_1 (selected_window
);
2927 /* If the user wants pop-up-frames or display-reuse-frames, then
2928 look for a window showing BUFFER on any visible or iconified frame.
2929 Otherwise search only the current frame. */
2932 else if (pop_up_frames
2933 || display_buffer_reuse_frames
2934 || last_nonminibuf_frame
== 0)
2935 XSETFASTINT (tem
, 0);
2937 XSETFRAME (tem
, last_nonminibuf_frame
);
2939 window
= Fget_buffer_window (buffer
, tem
);
2941 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2942 return display_buffer_1 (window
);
2944 /* Certain buffer names get special handling. */
2945 if (!NILP (Vspecial_display_function
) && NILP (swp
))
2947 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2949 return call1 (Vspecial_display_function
, buffer
);
2951 return call2 (Vspecial_display_function
, buffer
, tem
);
2954 /* If there are no frames open that have more than a minibuffer,
2955 we need to create a new frame. */
2956 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2958 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2959 Fset_window_buffer (window
, buffer
);
2960 return display_buffer_1 (window
);
2963 f
= SELECTED_FRAME ();
2965 || FRAME_MINIBUF_ONLY_P (f
)
2966 /* If the current frame is a special display frame,
2967 don't try to reuse its windows. */
2968 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
2973 if (FRAME_MINIBUF_ONLY_P (f
))
2974 XSETFRAME (frames
, last_nonminibuf_frame
);
2975 /* Don't try to create a window if would get an error */
2976 if (split_height_threshold
< window_min_height
<< 1)
2977 split_height_threshold
= window_min_height
<< 1;
2979 /* Note that both Fget_largest_window and Fget_lru_window
2980 ignore minibuffers and dedicated windows.
2981 This means they can return nil. */
2983 /* If the frame we would try to split cannot be split,
2984 try other frames. */
2985 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
2987 /* Try visible frames first. */
2988 window
= Fget_largest_window (Qvisible
);
2989 /* If that didn't work, try iconified frames. */
2991 window
= Fget_largest_window (make_number (0));
2993 window
= Fget_largest_window (Qt
);
2996 window
= Fget_largest_window (frames
);
2998 /* If we got a tall enough full-width window that can be split,
3001 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3002 && window_height (window
) >= split_height_threshold
3003 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
3004 window
= Fsplit_window (window
, Qnil
, Qnil
);
3007 Lisp_Object upper
, lower
, other
;
3009 window
= Fget_lru_window (frames
);
3010 /* If the LRU window is selected, and big enough,
3011 and can be split, split it. */
3013 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
3014 && (EQ (window
, selected_window
)
3015 || EQ (XWINDOW (window
)->parent
, Qnil
))
3016 && window_height (window
) >= window_min_height
<< 1)
3017 window
= Fsplit_window (window
, Qnil
, Qnil
);
3018 /* If Fget_lru_window returned nil, try other approaches. */
3020 /* Try visible frames first. */
3022 window
= Fget_buffer_window (buffer
, Qvisible
);
3024 window
= Fget_largest_window (Qvisible
);
3025 /* If that didn't work, try iconified frames. */
3027 window
= Fget_buffer_window (buffer
, make_number (0));
3029 window
= Fget_largest_window (make_number (0));
3030 /* Try invisible frames. */
3032 window
= Fget_buffer_window (buffer
, Qt
);
3034 window
= Fget_largest_window (Qt
);
3035 /* As a last resort, make a new frame. */
3037 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
3038 /* If window appears above or below another,
3039 even out their heights. */
3040 other
= upper
= lower
= Qnil
;
3041 if (!NILP (XWINDOW (window
)->prev
))
3042 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3043 if (!NILP (XWINDOW (window
)->next
))
3044 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3046 && !NILP (Veven_window_heights
)
3047 /* Check that OTHER and WINDOW are vertically arrayed. */
3048 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
3049 && (XFASTINT (XWINDOW (other
)->height
)
3050 > XFASTINT (XWINDOW (window
)->height
)))
3052 int total
= (XFASTINT (XWINDOW (other
)->height
)
3053 + XFASTINT (XWINDOW (window
)->height
));
3054 enlarge_window (upper
,
3055 total
/ 2 - XFASTINT (XWINDOW (upper
)->height
),
3061 window
= Fget_lru_window (Qnil
);
3063 Fset_window_buffer (window
, buffer
);
3064 return display_buffer_1 (window
);
3068 temp_output_buffer_show (buf
)
3069 register Lisp_Object buf
;
3071 register struct buffer
*old
= current_buffer
;
3072 register Lisp_Object window
;
3073 register struct window
*w
;
3075 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3078 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3082 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3083 set_buffer_internal (old
);
3085 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3086 call1 (Vtemp_buffer_show_function
, buf
);
3089 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3091 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3092 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3093 Vminibuf_scroll_window
= window
;
3094 w
= XWINDOW (window
);
3095 XSETFASTINT (w
->hscroll
, 0);
3096 XSETFASTINT (w
->min_hscroll
, 0);
3097 set_marker_restricted_both (w
->start
, buf
, 1, 1);
3098 set_marker_restricted_both (w
->pointm
, buf
, 1, 1);
3100 /* Run temp-buffer-show-hook, with the chosen window selected
3101 and it sbuffer current. */
3102 if (!NILP (Vrun_hooks
))
3105 tem
= Fboundp (Qtemp_buffer_show_hook
);
3108 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
3111 int count
= specpdl_ptr
- specpdl
;
3112 Lisp_Object prev_window
;
3113 prev_window
= selected_window
;
3115 /* Select the window that was chosen, for running the hook. */
3116 record_unwind_protect (Fselect_window
, prev_window
);
3117 select_window_1 (window
, 0);
3118 Fset_buffer (w
->buffer
);
3119 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3120 select_window_1 (prev_window
, 0);
3121 unbind_to (count
, Qnil
);
3129 make_dummy_parent (window
)
3133 register struct window
*o
, *p
;
3134 register struct Lisp_Vector
*vec
;
3137 o
= XWINDOW (window
);
3138 vec
= allocate_vectorlike ((EMACS_INT
)VECSIZE (struct window
));
3139 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3140 vec
->contents
[i
] = ((struct Lisp_Vector
*)o
)->contents
[i
];
3141 vec
->size
= VECSIZE (struct window
);
3142 p
= (struct window
*)vec
;
3143 XSETWINDOW (new, p
);
3145 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
3147 /* Put new into window structure in place of window */
3148 replace_window (window
, new);
3161 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3162 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
3163 WINDOW defaults to selected one and SIZE to half its size.\n\
3164 If optional third arg HORFLAG is non-nil, split side by side\n\
3165 and put SIZE columns in the first of the pair. In that case,\n\
3166 SIZE includes that window's scroll bar, or the divider column to its right.")
3167 (window
, size
, horflag
)
3168 Lisp_Object window
, size
, horflag
;
3170 register Lisp_Object
new;
3171 register struct window
*o
, *p
;
3173 register int size_int
;
3176 window
= selected_window
;
3178 CHECK_LIVE_WINDOW (window
, 0);
3180 o
= XWINDOW (window
);
3181 fo
= XFRAME (WINDOW_FRAME (o
));
3185 if (!NILP (horflag
))
3186 /* Calculate the size of the left-hand window, by dividing
3187 the usable space in columns by two.
3188 We round up, since the left-hand window may include
3189 a dividing line, while the right-hand may not. */
3190 size_int
= (XFASTINT (o
->width
) + 1) >> 1;
3192 size_int
= XFASTINT (o
->height
) >> 1;
3196 CHECK_NUMBER (size
, 1);
3197 size_int
= XINT (size
);
3200 if (MINI_WINDOW_P (o
))
3201 error ("Attempt to split minibuffer window");
3202 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3203 error ("Attempt to split fixed-size window");
3205 check_min_window_sizes ();
3209 if (size_int
< window_min_height
)
3210 error ("Window height %d too small (after splitting)", size_int
);
3211 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
3212 error ("Window height %d too small (after splitting)",
3213 XFASTINT (o
->height
) - size_int
);
3214 if (NILP (o
->parent
)
3215 || NILP (XWINDOW (o
->parent
)->vchild
))
3217 make_dummy_parent (window
);
3219 XWINDOW (new)->vchild
= window
;
3224 if (size_int
< window_min_width
)
3225 error ("Window width %d too small (after splitting)", size_int
);
3227 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
3228 error ("Window width %d too small (after splitting)",
3229 XFASTINT (o
->width
) - size_int
);
3230 if (NILP (o
->parent
)
3231 || NILP (XWINDOW (o
->parent
)->hchild
))
3233 make_dummy_parent (window
);
3235 XWINDOW (new)->hchild
= window
;
3239 /* Now we know that window's parent is a vertical combination
3240 if we are dividing vertically, or a horizontal combination
3241 if we are making side-by-side windows */
3243 windows_or_buffers_changed
++;
3244 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3245 new = make_window ();
3248 p
->frame
= o
->frame
;
3250 if (!NILP (p
->next
))
3251 XWINDOW (p
->next
)->prev
= new;
3254 p
->parent
= o
->parent
;
3256 p
->window_end_valid
= Qnil
;
3257 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3259 /* Apportion the available frame space among the two new windows */
3261 if (!NILP (horflag
))
3263 p
->height
= o
->height
;
3265 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
3266 XSETFASTINT (o
->width
, size_int
);
3267 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
3272 p
->width
= o
->width
;
3273 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
3274 XSETFASTINT (o
->height
, size_int
);
3275 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
3278 /* Adjust glyph matrices. */
3280 Fset_window_buffer (new, o
->buffer
);
3284 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
3285 "Make current window ARG lines bigger.\n\
3286 From program, optional second arg non-nil means grow sideways ARG columns.")
3288 register Lisp_Object arg
, side
;
3290 CHECK_NUMBER (arg
, 0);
3291 enlarge_window (selected_window
, XINT (arg
), !NILP (side
));
3293 if (! NILP (Vwindow_configuration_change_hook
))
3294 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3299 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
3300 "Make current window ARG lines smaller.\n\
3301 From program, optional second arg non-nil means shrink sideways arg columns.")
3303 register Lisp_Object arg
, side
;
3305 CHECK_NUMBER (arg
, 0);
3306 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
3308 if (! NILP (Vwindow_configuration_change_hook
))
3309 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3315 window_height (window
)
3318 register struct window
*p
= XWINDOW (window
);
3319 return XFASTINT (p
->height
);
3323 window_width (window
)
3326 register struct window
*p
= XWINDOW (window
);
3327 return XFASTINT (p
->width
);
3332 *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top))
3334 #define CURSIZE(w) \
3335 *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height))
3338 /* Enlarge selected_window by DELTA. WIDTHFLAG non-zero means
3339 increase its width. Siblings of the selected window are resized to
3340 fullfil the size request. If they become too small in the process,
3341 they will be deleted. */
3344 enlarge_window (window
, delta
, widthflag
)
3346 int delta
, widthflag
;
3348 Lisp_Object parent
, next
, prev
;
3352 int (*sizefun
) P_ ((Lisp_Object
))
3353 = widthflag
? window_width
: window_height
;
3354 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3355 = (widthflag
? set_window_width
: set_window_height
);
3357 /* Check values of window_min_width and window_min_height for
3359 check_min_window_sizes ();
3361 /* Give up if this window cannot be resized. */
3362 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3363 error ("Window is not resizable");
3365 /* Find the parent of the selected window. */
3368 p
= XWINDOW (window
);
3374 error ("No other window to side of this one");
3379 ? !NILP (XWINDOW (parent
)->hchild
)
3380 : !NILP (XWINDOW (parent
)->vchild
))
3386 sizep
= &CURSIZE (window
);
3389 register int maxdelta
;
3391 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
3392 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
3393 - window_min_size (XWINDOW (p
->next
),
3395 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
3396 - window_min_size (XWINDOW (p
->prev
),
3398 /* This is a frame with only one window, a minibuffer-only
3399 or a minibufferless frame. */
3402 if (delta
> maxdelta
)
3403 /* This case traps trying to make the minibuffer
3404 the full frame, or make the only window aside from the
3405 minibuffer the full frame. */
3409 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
3411 delete_window (window
);
3418 /* Find the total we can get from other siblings. */
3420 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
3421 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
3423 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
3424 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
3427 /* If we can get it all from them, do so. */
3428 if (delta
<= maximum
)
3430 Lisp_Object first_unaffected
;
3431 Lisp_Object first_affected
;
3436 first_affected
= window
;
3437 /* Look at one sibling at a time,
3438 moving away from this window in both directions alternately,
3439 and take as much as we can get without deleting that sibling. */
3440 while (delta
!= 0 && (!NILP (next
) || !NILP (prev
)))
3444 int this_one
= ((*sizefun
) (next
)
3445 - window_min_size (XWINDOW (next
),
3446 widthflag
, 0, &fixed_p
));
3449 if (this_one
> delta
)
3452 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
3453 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3458 next
= XWINDOW (next
)->next
;
3466 int this_one
= ((*sizefun
) (prev
)
3467 - window_min_size (XWINDOW (prev
),
3468 widthflag
, 0, &fixed_p
));
3471 if (this_one
> delta
)
3474 first_affected
= prev
;
3476 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
3477 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3482 prev
= XWINDOW (prev
)->prev
;
3486 xassert (delta
== 0);
3488 /* Now recalculate the edge positions of all the windows affected,
3489 based on the new sizes. */
3490 first_unaffected
= next
;
3491 prev
= first_affected
;
3492 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
3493 prev
= next
, next
= XWINDOW (next
)->next
)
3495 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
3496 /* This does not change size of NEXT,
3497 but it propagates the new top edge to its children */
3498 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
3503 register int delta1
;
3504 register int opht
= (*sizefun
) (parent
);
3506 /* If trying to grow this window to or beyond size of the parent,
3507 make delta1 so big that, on shrinking back down,
3508 all the siblings end up with less than one line and are deleted. */
3509 if (opht
<= XINT (*sizep
) + delta
)
3510 delta1
= opht
* opht
* 2;
3513 /* Otherwise, make delta1 just right so that if we add
3514 delta1 lines to this window and to the parent, and then
3515 shrink the parent back to its original size, the new
3516 proportional size of this window will increase by delta.
3518 The function size_window will compute the new height h'
3519 of the window from delta1 as:
3522 x = delta1 - delta1/n * n for the 1st resizable child
3525 where n is the number of children that can be resized.
3526 We can ignore x by choosing a delta1 that is a multiple of
3527 n. We want the height of this window to come out as
3537 The number of children n rquals the number of resizable
3538 children of this window + 1 because we know window itself
3539 is resizable (otherwise we would have signalled an error. */
3541 struct window
*w
= XWINDOW (window
);
3545 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
3546 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3548 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
3549 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3555 /* Add delta1 lines or columns to this window, and to the parent,
3556 keeping things consistent while not affecting siblings. */
3557 XSETINT (CURSIZE (parent
), opht
+ delta1
);
3558 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
3560 /* Squeeze out delta1 lines or columns from our parent,
3561 shriking this window and siblings proportionately.
3562 This brings parent back to correct size.
3563 Delta1 was calculated so this makes this window the desired size,
3564 taking it all out of the siblings. */
3565 (*setsizefun
) (parent
, opht
, 0);
3568 XSETFASTINT (p
->last_modified
, 0);
3569 XSETFASTINT (p
->last_overlay_modified
, 0);
3571 /* Adjust glyph matrices. */
3572 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
3580 /***********************************************************************
3581 Resizing Mini-Windows
3582 ***********************************************************************/
3584 static void shrink_window_lowest_first
P_ ((struct window
*, int));
3586 enum save_restore_action
3593 static int save_restore_orig_size
P_ ((struct window
*,
3594 enum save_restore_action
));
3596 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
3597 from lowest windows first. */
3600 shrink_window_lowest_first (w
, height
)
3608 xassert (!MINI_WINDOW_P (w
));
3610 /* Set redisplay hints. */
3611 XSETFASTINT (w
->last_modified
, 0);
3612 XSETFASTINT (w
->last_overlay_modified
, 0);
3613 windows_or_buffers_changed
++;
3614 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
3616 old_height
= XFASTINT (w
->height
);
3617 XSETFASTINT (w
->height
, height
);
3619 if (!NILP (w
->hchild
))
3621 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
3623 c
= XWINDOW (child
);
3625 shrink_window_lowest_first (c
, height
);
3628 else if (!NILP (w
->vchild
))
3630 Lisp_Object last_child
;
3631 int delta
= old_height
- height
;
3636 /* Find the last child. We are taking space from lowest windows
3637 first, so we iterate over children from the last child
3639 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
3642 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
3643 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
3647 c
= XWINDOW (child
);
3648 this_one
= XFASTINT (c
->height
) - MIN_SAFE_WINDOW_HEIGHT
;
3650 if (this_one
> delta
)
3653 shrink_window_lowest_first (c
, XFASTINT (c
->height
) - this_one
);
3657 /* Compute new positions. */
3658 last_top
= XINT (w
->top
);
3659 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
3661 c
= XWINDOW (child
);
3662 c
->top
= make_number (last_top
);
3663 shrink_window_lowest_first (c
, XFASTINT (c
->height
));
3664 last_top
+= XFASTINT (c
->height
);
3670 /* Save, restore, or check positions and sizes in the window tree
3671 rooted at W. ACTION says what to do.
3673 If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height
3674 members are valid for all windows in the window tree. Value is
3675 non-zero if they are valid.
3677 If ACTION is SAVE_ORIG_SIZES, save members top and height in
3678 orig_top and orig_height for all windows in the tree.
3680 If ACTION is RESTORE_ORIG_SIZES, restore top and height from
3681 values stored in orig_top and orig_height for all windows. */
3684 save_restore_orig_size (w
, action
)
3686 enum save_restore_action action
;
3692 if (!NILP (w
->hchild
))
3694 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
3697 else if (!NILP (w
->vchild
))
3699 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
3705 case CHECK_ORIG_SIZES
:
3706 if (!INTEGERP (w
->orig_top
) || !INTEGERP (w
->orig_height
))
3710 case SAVE_ORIG_SIZES
:
3711 w
->orig_top
= w
->top
;
3712 w
->orig_height
= w
->height
;
3713 XSETFASTINT (w
->last_modified
, 0);
3714 XSETFASTINT (w
->last_overlay_modified
, 0);
3717 case RESTORE_ORIG_SIZES
:
3718 xassert (INTEGERP (w
->orig_top
) && INTEGERP (w
->orig_height
));
3719 w
->top
= w
->orig_top
;
3720 w
->height
= w
->orig_height
;
3721 w
->orig_height
= w
->orig_top
= Qnil
;
3722 XSETFASTINT (w
->last_modified
, 0);
3723 XSETFASTINT (w
->last_overlay_modified
, 0);
3730 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
3737 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
3738 without deleting other windows. */
3741 grow_mini_window (w
, delta
)
3745 struct frame
*f
= XFRAME (w
->frame
);
3746 struct window
*root
;
3748 xassert (MINI_WINDOW_P (w
));
3749 xassert (delta
>= 0);
3751 /* Check values of window_min_width and window_min_height for
3753 check_min_window_sizes ();
3755 /* Compute how much we can enlarge the mini-window without deleting
3757 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3760 int min_height
= window_min_size (root
, 0, 0, 0);
3761 if (XFASTINT (root
->height
) - delta
< min_height
)
3762 delta
= XFASTINT (root
->height
) - min_height
;
3767 /* Save original window sizes and positions, if not already done. */
3768 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3769 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
3771 /* Shrink other windows. */
3772 shrink_window_lowest_first (root
, XFASTINT (root
->height
) - delta
);
3774 /* Grow the mini-window. */
3775 w
->top
= make_number (XFASTINT (root
->top
) + XFASTINT (root
->height
));
3776 w
->height
= make_number (XFASTINT (w
->height
) + delta
);
3777 XSETFASTINT (w
->last_modified
, 0);
3778 XSETFASTINT (w
->last_overlay_modified
, 0);
3785 /* Shrink mini-window W. If there is recorded info about window sizes
3786 before a call to grow_mini_window, restore recorded window sizes.
3787 Otherwise, if the mini-window is higher than 1 line, resize it to 1
3791 shrink_mini_window (w
)
3794 struct frame
*f
= XFRAME (w
->frame
);
3795 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3797 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3799 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
3801 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3802 windows_or_buffers_changed
= 1;
3804 else if (XFASTINT (w
->height
) > 1)
3807 XSETWINDOW (window
, w
);
3808 enlarge_window (window
, 1 - XFASTINT (w
->height
), 0);
3814 /* Mark window cursors off for all windows in the window tree rooted
3815 at W by setting their phys_cursor_on_p flag to zero. Called from
3816 xterm.c, e.g. when a frame is cleared and thereby all cursors on
3817 the frame are cleared. */
3820 mark_window_cursors_off (w
)
3825 if (!NILP (w
->hchild
))
3826 mark_window_cursors_off (XWINDOW (w
->hchild
));
3827 else if (!NILP (w
->vchild
))
3828 mark_window_cursors_off (XWINDOW (w
->vchild
));
3830 w
->phys_cursor_on_p
= 0;
3832 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3837 /* Return number of lines of text (not counting mode line) in W. */
3840 window_internal_height (w
)
3843 int ht
= XFASTINT (w
->height
);
3845 if (MINI_WINDOW_P (w
))
3848 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
3849 || !NILP (w
->next
) || !NILP (w
->prev
)
3850 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
3857 /* Return the number of columns in W.
3858 Don't count columns occupied by scroll bars or the vertical bar
3859 separating W from the sibling to its right. */
3862 window_internal_width (w
)
3865 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3866 int width
= XINT (w
->width
);
3868 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3869 /* Scroll bars occupy a few columns. */
3870 width
-= FRAME_SCROLL_BAR_COLS (f
);
3871 else if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
3872 /* The column of `|' characters separating side-by-side windows
3873 occupies one column only. */
3876 /* On window-systems, areas to the left and right of the window
3877 are used to display bitmaps there. */
3878 if (FRAME_WINDOW_P (f
))
3879 width
-= FRAME_FLAGS_AREA_COLS (f
);
3885 /************************************************************************
3887 ***********************************************************************/
3889 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
3890 one screen-full, which is defined as the height of the window minus
3891 next_screen_context_lines. If WHOLE is zero, scroll up N lines
3892 instead. Negative values of N mean scroll down. NOERROR non-zero
3893 means don't signal an error if we try to move over BEGV or ZV,
3897 window_scroll (window
, n
, whole
, noerror
)
3903 /* If we must, use the pixel-based version which is much slower than
3904 the line-based one but can handle varying line heights. */
3905 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
3906 window_scroll_pixel_based (window
, n
, whole
, noerror
);
3908 window_scroll_line_based (window
, n
, whole
, noerror
);
3912 /* Implementation of window_scroll that works based on pixel line
3913 heights. See the comment of window_scroll for parameter
3917 window_scroll_pixel_based (window
, n
, whole
, noerror
)
3924 struct window
*w
= XWINDOW (window
);
3925 struct text_pos start
;
3927 int this_scroll_margin
;
3929 /* True if we fiddled the window vscroll field without really scrolling. */
3932 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
3934 /* If PT is not visible in WINDOW, move back one half of
3936 tem
= Fpos_visible_in_window_p (make_number (PT
), window
, Qnil
);
3939 /* Move backward half the height of the window. Performance note:
3940 vmotion used here is about 10% faster, but would give wrong
3941 results for variable height lines. */
3942 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3943 it
.current_y
= it
.last_visible_y
;
3944 move_it_vertically (&it
, -it
.last_visible_y
/ 2);
3946 /* The function move_iterator_vertically may move over more than
3947 the specified y-distance. If it->w is small, e.g. a
3948 mini-buffer window, we may end up in front of the window's
3949 display area. This is the case when Start displaying at the
3950 start of the line containing PT in this case. */
3951 if (it
.current_y
<= 0)
3953 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3954 move_it_vertically (&it
, 0);
3958 start
= it
.current
.pos
;
3961 /* If scroll_preserve_screen_position is non-zero, we try to set
3962 point in the same window line as it is now, so get that line. */
3963 if (!NILP (Vscroll_preserve_screen_position
))
3965 start_display (&it
, w
, start
);
3966 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
3967 preserve_y
= it
.current_y
;
3972 /* Move iterator it from start the specified distance forward or
3973 backward. The result is the new window start. */
3974 start_display (&it
, w
, start
);
3977 int screen_full
= (it
.last_visible_y
3978 - next_screen_context_lines
* CANON_Y_UNIT (it
.f
));
3979 int direction
= n
< 0 ? -1 : 1;
3980 int dy
= direction
* screen_full
;
3982 /* Note that move_it_vertically always moves the iterator to the
3983 start of a line. So, if the last line doesn't have a newline,
3984 we would end up at the start of the line ending at ZV. */
3986 move_it_vertically_backward (&it
, -dy
);
3988 move_it_to (&it
, ZV
, -1, it
.current_y
+ dy
, -1,
3989 MOVE_TO_POS
| MOVE_TO_Y
);
3992 move_it_by_lines (&it
, n
, 1);
3994 /* End if we end up at ZV or BEGV. */
3995 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
3996 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
3998 if (IT_CHARPOS (it
) == ZV
)
4000 if (it
.current_y
+ it
.max_ascent
+ it
.max_descent
4001 > it
.last_visible_y
)
4003 /* The last line was only partially visible, make it fully
4005 w
->vscroll
= (it
.last_visible_y
4006 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
);
4007 adjust_glyphs (it
.f
);
4012 Fsignal (Qend_of_buffer
, Qnil
);
4016 if (w
->vscroll
!= 0)
4017 /* The first line was only partially visible, make it fully
4023 Fsignal (Qbeginning_of_buffer
, Qnil
);
4026 /* If control gets here, then we vscrolled. */
4028 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
4030 /* Don't try to change the window start below. */
4036 /* Set the window start, and set up the window for redisplay. */
4037 set_marker_restricted (w
->start
, make_number (IT_CHARPOS (it
)),
4039 w
->start_at_line_beg
= Fbolp ();
4040 w
->update_mode_line
= Qt
;
4041 XSETFASTINT (w
->last_modified
, 0);
4042 XSETFASTINT (w
->last_overlay_modified
, 0);
4043 /* Set force_start so that redisplay_window will run the
4044 window-scroll-functions. */
4045 w
->force_start
= Qt
;
4048 it
.current_y
= it
.vpos
= 0;
4050 /* Preserve the screen position if we must. */
4051 if (preserve_y
>= 0)
4053 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4054 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4058 /* Move PT out of scroll margins. */
4059 this_scroll_margin
= max (0, scroll_margin
);
4060 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
4061 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
4065 /* We moved the window start towards ZV, so PT may be now
4066 in the scroll margin at the top. */
4067 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4068 while (it
.current_y
< this_scroll_margin
)
4069 move_it_by_lines (&it
, 1, 1);
4070 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4074 int charpos
, bytepos
;
4076 /* We moved the window start towards BEGV, so PT may be now
4077 in the scroll margin at the bottom. */
4078 move_it_to (&it
, PT
, -1,
4079 it
.last_visible_y
- this_scroll_margin
- 1, -1,
4080 MOVE_TO_POS
| MOVE_TO_Y
);
4082 /* Save our position, in case it's correct. */
4083 charpos
= IT_CHARPOS (it
);
4084 bytepos
= IT_BYTEPOS (it
);
4086 /* See if point is on a partially visible line at the end. */
4087 move_it_by_lines (&it
, 1, 1);
4088 if (it
.current_y
> it
.last_visible_y
)
4089 /* The last line was only partially visible, so back up two
4090 lines to make sure we're on a fully visible line. */
4092 move_it_by_lines (&it
, -2, 0);
4093 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4096 /* No, the position we saved is OK, so use it. */
4097 SET_PT_BOTH (charpos
, bytepos
);
4103 /* Implementation of window_scroll that works based on screen lines.
4104 See the comment of window_scroll for parameter descriptions. */
4107 window_scroll_line_based (window
, n
, whole
, noerror
)
4113 register struct window
*w
= XWINDOW (window
);
4114 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4115 register int pos
, pos_byte
;
4116 register int ht
= window_internal_height (w
);
4117 register Lisp_Object tem
;
4121 struct position posit
;
4124 startpos
= marker_position (w
->start
);
4126 posit
= *compute_motion (startpos
, 0, 0, 0,
4128 window_internal_width (w
), XINT (w
->hscroll
),
4130 original_vpos
= posit
.vpos
;
4132 XSETFASTINT (tem
, PT
);
4133 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4137 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4142 lose
= n
< 0 && PT
== BEGV
;
4143 Fvertical_motion (make_number (n
), window
);
4147 SET_PT_BOTH (opoint
, opoint_byte
);
4154 Fsignal (Qbeginning_of_buffer
, Qnil
);
4159 int this_scroll_margin
= scroll_margin
;
4161 /* Don't use a scroll margin that is negative or too large. */
4162 if (this_scroll_margin
< 0)
4163 this_scroll_margin
= 0;
4165 if (XINT (w
->height
) < 4 * scroll_margin
)
4166 this_scroll_margin
= XINT (w
->height
) / 4;
4168 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4169 w
->start_at_line_beg
= bolp
;
4170 w
->update_mode_line
= Qt
;
4171 XSETFASTINT (w
->last_modified
, 0);
4172 XSETFASTINT (w
->last_overlay_modified
, 0);
4173 /* Set force_start so that redisplay_window will run
4174 the window-scroll-functions. */
4175 w
->force_start
= Qt
;
4177 if (whole
&& !NILP (Vscroll_preserve_screen_position
))
4179 SET_PT_BOTH (pos
, pos_byte
);
4180 Fvertical_motion (make_number (original_vpos
), window
);
4182 /* If we scrolled forward, put point enough lines down
4183 that it is outside the scroll margin. */
4188 if (this_scroll_margin
> 0)
4190 SET_PT_BOTH (pos
, pos_byte
);
4191 Fvertical_motion (make_number (this_scroll_margin
), window
);
4197 if (top_margin
<= opoint
)
4198 SET_PT_BOTH (opoint
, opoint_byte
);
4199 else if (!NILP (Vscroll_preserve_screen_position
))
4201 SET_PT_BOTH (pos
, pos_byte
);
4202 Fvertical_motion (make_number (original_vpos
), window
);
4205 SET_PT (top_margin
);
4211 /* If we scrolled backward, put point near the end of the window
4212 but not within the scroll margin. */
4213 SET_PT_BOTH (pos
, pos_byte
);
4214 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4215 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4218 bottom_margin
= PT
+ 1;
4220 if (bottom_margin
> opoint
)
4221 SET_PT_BOTH (opoint
, opoint_byte
);
4224 if (!NILP (Vscroll_preserve_screen_position
))
4226 SET_PT_BOTH (pos
, pos_byte
);
4227 Fvertical_motion (make_number (original_vpos
), window
);
4230 Fvertical_motion (make_number (-1), window
);
4239 Fsignal (Qend_of_buffer
, Qnil
);
4244 /* Scroll selected_window up or down. If N is nil, scroll a
4245 screen-full which is defined as the height of the window minus
4246 next_screen_context_lines. If N is the symbol `-', scroll.
4247 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
4248 up. This is the guts of Fscroll_up and Fscroll_down. */
4251 scroll_command (n
, direction
)
4255 register int defalt
;
4256 int count
= specpdl_ptr
- specpdl
;
4258 xassert (abs (direction
) == 1);
4260 /* If selected window's buffer isn't current, make it current for
4261 the moment. But don't screw up if window_scroll gets an error. */
4262 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
4264 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4265 Fset_buffer (XWINDOW (selected_window
)->buffer
);
4267 /* Make redisplay consider other windows than just selected_window. */
4268 ++windows_or_buffers_changed
;
4271 defalt
= (window_internal_height (XWINDOW (selected_window
))
4272 - next_screen_context_lines
);
4273 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
4276 window_scroll (selected_window
, defalt
, 1, 0);
4277 else if (EQ (n
, Qminus
))
4278 window_scroll (selected_window
, - defalt
, 1, 0);
4281 n
= Fprefix_numeric_value (n
);
4282 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
4285 unbind_to (count
, Qnil
);
4288 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
4289 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
4290 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4291 Negative ARG means scroll downward.\n\
4292 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4293 When calling from a program, supply as argument a number, nil, or `-'.")
4297 scroll_command (arg
, 1);
4301 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
4302 "Scroll text of current window down ARG lines; or near full screen if no ARG.\n\
4303 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4304 Negative ARG means scroll upward.\n\
4305 If ARG is the atom `-', scroll upward by nearly full screen.\n\
4306 When calling from a program, supply as argument a number, nil, or `-'.")
4310 scroll_command (arg
, -1);
4314 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
4315 "Return the other window for \"other window scroll\" commands.\n\
4316 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4317 specifies the window.\n\
4318 If `other-window-scroll-buffer' is non-nil, a window\n\
4319 showing that buffer is used.")
4324 if (MINI_WINDOW_P (XWINDOW (selected_window
))
4325 && !NILP (Vminibuf_scroll_window
))
4326 window
= Vminibuf_scroll_window
;
4327 /* If buffer is specified, scroll that buffer. */
4328 else if (!NILP (Vother_window_scroll_buffer
))
4330 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
4332 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
4336 /* Nothing specified; look for a neighboring window on the same
4338 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
4340 if (EQ (window
, selected_window
))
4341 /* That didn't get us anywhere; look for a window on another
4344 window
= Fnext_window (window
, Qnil
, Qt
);
4345 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
4346 && ! EQ (window
, selected_window
));
4349 CHECK_LIVE_WINDOW (window
, 0);
4351 if (EQ (window
, selected_window
))
4352 error ("There is no other window");
4357 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
4358 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
4359 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4360 The next window is the one below the current one; or the one at the top\n\
4361 if the current one is at the bottom. Negative ARG means scroll downward.\n\
4362 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4363 When calling from a program, supply as argument a number, nil, or `-'.\n\
4365 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4366 specifies the window to scroll.\n\
4367 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
4368 showing that buffer, popping the buffer up if necessary.")
4370 register Lisp_Object arg
;
4372 register Lisp_Object window
;
4373 register int defalt
;
4374 register struct window
*w
;
4375 register int count
= specpdl_ptr
- specpdl
;
4377 window
= Fother_window_for_scrolling ();
4379 w
= XWINDOW (window
);
4380 defalt
= window_internal_height (w
) - next_screen_context_lines
;
4381 if (defalt
< 1) defalt
= 1;
4383 /* Don't screw up if window_scroll gets an error. */
4384 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4385 ++windows_or_buffers_changed
;
4387 Fset_buffer (w
->buffer
);
4388 SET_PT (marker_position (w
->pointm
));
4391 window_scroll (window
, defalt
, 1, 1);
4392 else if (EQ (arg
, Qminus
))
4393 window_scroll (window
, -defalt
, 1, 1);
4398 CHECK_NUMBER (arg
, 0);
4399 window_scroll (window
, XINT (arg
), 0, 1);
4402 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
4403 unbind_to (count
, Qnil
);
4408 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
4409 "Scroll selected window display ARG columns left.\n\
4410 Default for ARG is window width minus 2.")
4412 register Lisp_Object arg
;
4416 struct window
*w
= XWINDOW (selected_window
);
4419 XSETFASTINT (arg
, window_internal_width (w
) - 2);
4421 arg
= Fprefix_numeric_value (arg
);
4423 hscroll
= XINT (w
->hscroll
) + XINT (arg
);
4424 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4426 if (!NILP (Finteractive_p ()))
4427 w
->min_hscroll
= w
->hscroll
;
4432 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
4433 "Scroll selected window display ARG columns right.\n\
4434 Default for ARG is window width minus 2.")
4436 register Lisp_Object arg
;
4440 struct window
*w
= XWINDOW (selected_window
);
4443 XSETFASTINT (arg
, window_internal_width (w
) - 2);
4445 arg
= Fprefix_numeric_value (arg
);
4447 hscroll
= XINT (w
->hscroll
) - XINT (arg
);
4448 result
= Fset_window_hscroll (selected_window
, make_number (hscroll
));
4450 if (!NILP (Finteractive_p ()))
4451 w
->min_hscroll
= w
->hscroll
;
4456 /* Value is the number of lines actually displayed in window W,
4457 as opposed to its height. */
4460 displayed_window_lines (w
)
4464 struct text_pos start
;
4465 int height
= window_box_height (w
);
4466 struct buffer
*old_buffer
;
4469 if (XBUFFER (w
->buffer
) != current_buffer
)
4471 old_buffer
= current_buffer
;
4472 set_buffer_internal (XBUFFER (w
->buffer
));
4477 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4478 start_display (&it
, w
, start
);
4479 move_it_vertically (&it
, height
);
4482 set_buffer_internal (old_buffer
);
4484 bottom_y
= it
.current_y
+ it
.max_ascent
+ it
.max_descent
;
4486 if (bottom_y
> it
.current_y
&& bottom_y
<= it
.last_visible_y
)
4487 /* Hit a line without a terminating newline. */
4490 /* Add in empty lines at the bottom of the window. */
4491 if (bottom_y
< height
)
4493 struct frame
*f
= XFRAME (w
->frame
);
4494 int rest
= height
- bottom_y
;
4495 int lines
= rest
/ CANON_Y_UNIT (f
);
4503 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
4504 "Center point in window and redisplay frame.\n\
4505 With prefix argument ARG, recenter putting point on screen line ARG\n\
4506 relative to the current window. If ARG is negative, it counts up from the\n\
4507 bottom of the window. (ARG should be less than the height of the window.)\n\
4509 If ARG is omitted or nil, erase the entire frame and then\n\
4510 redraw with point in the center of the current window.\n\
4511 Just C-u as prefix means put point in the center of the window\n\
4512 and redisplay normally--don't erase and redraw the frame.")
4514 register Lisp_Object arg
;
4516 struct window
*w
= XWINDOW (selected_window
);
4517 struct buffer
*buf
= XBUFFER (w
->buffer
);
4518 struct buffer
*obuf
= current_buffer
;
4520 int charpos
, bytepos
;
4526 /* Invalidate pixel data calculated for all compositions. */
4527 for (i
= 0; i
< n_compositions
; i
++)
4528 composition_table
[i
]->font
= NULL
;
4530 Fredraw_frame (w
->frame
);
4531 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
4534 else if (CONSP (arg
)) /* Just C-u. */
4538 arg
= Fprefix_numeric_value (arg
);
4539 CHECK_NUMBER (arg
, 0);
4542 set_buffer_internal (buf
);
4544 /* Handle centering on a gfaphical frame specially. Such frames can
4545 have variable-height lines and centering point on the basis of
4546 line counts would lead to strange effects. */
4547 if (center_p
&& FRAME_WINDOW_P (XFRAME (w
->frame
)))
4552 SET_TEXT_POS (pt
, PT
, PT_BYTE
);
4553 start_display (&it
, w
, pt
);
4554 move_it_vertically (&it
, - it
.last_visible_y
/ 2);
4555 charpos
= IT_CHARPOS (it
);
4556 bytepos
= IT_BYTEPOS (it
);
4560 struct position pos
;
4564 int ht
= displayed_window_lines (w
);
4565 arg
= make_number (ht
/ 2);
4567 else if (XINT (arg
) < 0)
4569 int ht
= displayed_window_lines (w
);
4570 XSETINT (arg
, XINT (arg
) + ht
);
4573 pos
= *vmotion (PT
, - XINT (arg
), w
);
4574 charpos
= pos
.bufpos
;
4575 bytepos
= pos
.bytepos
;
4578 /* Set the new window start. */
4579 set_marker_both (w
->start
, w
->buffer
, charpos
, bytepos
);
4580 w
->window_end_valid
= Qnil
;
4581 w
->force_start
= Qt
;
4582 if (bytepos
== BEGV_BYTE
|| FETCH_BYTE (bytepos
- 1) == '\n')
4583 w
->start_at_line_beg
= Qt
;
4585 w
->start_at_line_beg
= Qnil
;
4587 set_buffer_internal (obuf
);
4592 DEFUN ("window-text-height", Fwindow_text_height
, Swindow_text_height
,
4594 "Return the height in lines of the text display area of WINDOW.\n\
4595 This doesn't include the mode-line (or header-line if any) or any\n\
4596 partial-height lines in the text display area.")
4600 struct window
*w
= decode_window (window
);
4601 int pixel_height
= window_box_height (w
);
4602 int line_height
= pixel_height
/ CANON_Y_UNIT (XFRAME (w
->frame
));
4603 return make_number (line_height
);
4608 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
4610 "Position point relative to window.\n\
4611 With no argument, position point at center of window.\n\
4612 An argument specifies vertical position within the window;\n\
4613 zero means top of window, negative means relative to bottom of window.")
4617 struct window
*w
= XWINDOW (selected_window
);
4621 window
= selected_window
;
4622 start
= marker_position (w
->start
);
4623 if (start
< BEGV
|| start
> ZV
)
4625 int height
= window_internal_height (w
);
4626 Fvertical_motion (make_number (- (height
/ 2)), window
);
4627 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
4628 w
->start_at_line_beg
= Fbolp ();
4629 w
->force_start
= Qt
;
4632 Fgoto_char (w
->start
);
4634 lines
= displayed_window_lines (w
);
4636 XSETFASTINT (arg
, lines
/ 2);
4639 arg
= Fprefix_numeric_value (arg
);
4641 XSETINT (arg
, XINT (arg
) + lines
);
4645 /* Skip past a partially visible first line. */
4646 XSETINT (arg
, XINT (arg
) + 1);
4648 return Fvertical_motion (arg
, window
);
4653 /***********************************************************************
4654 Window Configuration
4655 ***********************************************************************/
4657 struct save_window_data
4659 EMACS_INT size_from_Lisp_Vector_struct
;
4660 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4661 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
4662 Lisp_Object frame_tool_bar_lines
;
4663 Lisp_Object selected_frame
;
4664 Lisp_Object current_window
;
4665 Lisp_Object current_buffer
;
4666 Lisp_Object minibuf_scroll_window
;
4667 Lisp_Object root_window
;
4668 Lisp_Object focus_frame
;
4669 /* Record the values of window-min-width and window-min-height
4670 so that window sizes remain consistent with them. */
4671 Lisp_Object min_width
, min_height
;
4672 /* A vector, each of whose elements is a struct saved_window
4674 Lisp_Object saved_windows
;
4677 /* This is saved as a Lisp_Vector */
4680 /* these first two must agree with struct Lisp_Vector in lisp.h */
4681 EMACS_INT size_from_Lisp_Vector_struct
;
4682 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4685 Lisp_Object buffer
, start
, pointm
, mark
;
4686 Lisp_Object left
, top
, width
, height
, hscroll
, min_hscroll
;
4687 Lisp_Object parent
, prev
;
4688 Lisp_Object start_at_line_beg
;
4689 Lisp_Object display_table
;
4690 Lisp_Object orig_top
, orig_height
;
4693 #define SAVED_WINDOW_VECTOR_SIZE 17 /* Arg to Fmake_vector */
4695 #define SAVED_WINDOW_N(swv,n) \
4696 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
4698 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
4699 "Return t if OBJECT is a window-configuration object.")
4703 if (WINDOW_CONFIGURATIONP (object
))
4708 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
4709 "Return the frame that CONFIG, a window-configuration object, is about.")
4713 register struct save_window_data
*data
;
4714 struct Lisp_Vector
*saved_windows
;
4716 if (! WINDOW_CONFIGURATIONP (config
))
4717 wrong_type_argument (Qwindow_configuration_p
, config
);
4719 data
= (struct save_window_data
*) XVECTOR (config
);
4720 saved_windows
= XVECTOR (data
->saved_windows
);
4721 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4724 DEFUN ("set-window-configuration", Fset_window_configuration
,
4725 Sset_window_configuration
, 1, 1, 0,
4726 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
4727 CONFIGURATION must be a value previously returned\n\
4728 by `current-window-configuration' (which see).\n\
4729 If CONFIGURATION was made from a frame that is now deleted,\n\
4730 only frame-independent values can be restored. In this case,\n\
4731 the return value is nil. Otherwise the value is t.")
4733 Lisp_Object configuration
;
4735 register struct save_window_data
*data
;
4736 struct Lisp_Vector
*saved_windows
;
4737 Lisp_Object new_current_buffer
;
4742 while (!WINDOW_CONFIGURATIONP (configuration
))
4743 wrong_type_argument (Qwindow_configuration_p
, configuration
);
4745 data
= (struct save_window_data
*) XVECTOR (configuration
);
4746 saved_windows
= XVECTOR (data
->saved_windows
);
4748 new_current_buffer
= data
->current_buffer
;
4749 if (NILP (XBUFFER (new_current_buffer
)->name
))
4750 new_current_buffer
= Qnil
;
4753 if (XBUFFER (new_current_buffer
) == current_buffer
)
4757 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4760 /* If f is a dead frame, don't bother rebuilding its window tree.
4761 However, there is other stuff we should still try to do below. */
4762 if (FRAME_LIVE_P (f
))
4764 register struct window
*w
;
4765 register struct saved_window
*p
;
4766 struct window
*root_window
;
4767 struct window
**leaf_windows
;
4771 /* If the frame has been resized since this window configuration was
4772 made, we change the frame to the size specified in the
4773 configuration, restore the configuration, and then resize it
4774 back. We keep track of the prevailing height in these variables. */
4775 int previous_frame_height
= FRAME_HEIGHT (f
);
4776 int previous_frame_width
= FRAME_WIDTH (f
);
4777 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
4778 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
4780 /* The mouse highlighting code could get screwed up
4781 if it runs during this. */
4784 if (XFASTINT (data
->frame_height
) != previous_frame_height
4785 || XFASTINT (data
->frame_width
) != previous_frame_width
)
4786 change_frame_size (f
, XFASTINT (data
->frame_height
),
4787 XFASTINT (data
->frame_width
), 0, 0, 0);
4788 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4789 if (XFASTINT (data
->frame_menu_bar_lines
)
4790 != previous_frame_menu_bar_lines
)
4791 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
4792 #ifdef HAVE_WINDOW_SYSTEM
4793 if (XFASTINT (data
->frame_tool_bar_lines
)
4794 != previous_frame_tool_bar_lines
)
4795 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
4799 /* "Swap out" point from the selected window
4800 into its buffer. We do this now, before
4801 restoring the window contents, and prevent it from
4802 being done later on when we select a new window. */
4803 if (! NILP (XWINDOW (selected_window
)->buffer
))
4805 w
= XWINDOW (selected_window
);
4806 set_marker_both (w
->pointm
,
4808 BUF_PT (XBUFFER (w
->buffer
)),
4809 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4812 windows_or_buffers_changed
++;
4813 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4815 /* Problem: Freeing all matrices and later allocating them again
4816 is a serious redisplay flickering problem. What we would
4817 really like to do is to free only those matrices not reused
4819 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4821 = (struct window
**) alloca (count_windows (root_window
)
4822 * sizeof (struct window
*));
4823 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
4825 /* Temporarily avoid any problems with windows that are smaller
4826 than they are supposed to be. */
4827 window_min_height
= 1;
4828 window_min_width
= 1;
4831 Mark all windows now on frame as "deleted".
4832 Restoring the new configuration "undeletes" any that are in it.
4834 Save their current buffers in their height fields, since we may
4835 need it later, if a buffer saved in the configuration is now
4837 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
4839 for (k
= 0; k
< saved_windows
->size
; k
++)
4841 p
= SAVED_WINDOW_N (saved_windows
, k
);
4842 w
= XWINDOW (p
->window
);
4845 if (!NILP (p
->parent
))
4846 w
->parent
= SAVED_WINDOW_N (saved_windows
,
4847 XFASTINT (p
->parent
))->window
;
4851 if (!NILP (p
->prev
))
4853 w
->prev
= SAVED_WINDOW_N (saved_windows
,
4854 XFASTINT (p
->prev
))->window
;
4855 XWINDOW (w
->prev
)->next
= p
->window
;
4860 if (!NILP (w
->parent
))
4862 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
4864 XWINDOW (w
->parent
)->vchild
= p
->window
;
4865 XWINDOW (w
->parent
)->hchild
= Qnil
;
4869 XWINDOW (w
->parent
)->hchild
= p
->window
;
4870 XWINDOW (w
->parent
)->vchild
= Qnil
;
4875 /* If we squirreled away the buffer in the window's height,
4877 if (BUFFERP (w
->height
))
4878 w
->buffer
= w
->height
;
4881 w
->width
= p
->width
;
4882 w
->height
= p
->height
;
4883 w
->hscroll
= p
->hscroll
;
4884 w
->min_hscroll
= p
->min_hscroll
;
4885 w
->display_table
= p
->display_table
;
4886 w
->orig_top
= p
->orig_top
;
4887 w
->orig_height
= p
->orig_height
;
4888 XSETFASTINT (w
->last_modified
, 0);
4889 XSETFASTINT (w
->last_overlay_modified
, 0);
4891 /* Reinstall the saved buffer and pointers into it. */
4892 if (NILP (p
->buffer
))
4893 w
->buffer
= p
->buffer
;
4896 if (!NILP (XBUFFER (p
->buffer
)->name
))
4897 /* If saved buffer is alive, install it. */
4899 w
->buffer
= p
->buffer
;
4900 w
->start_at_line_beg
= p
->start_at_line_beg
;
4901 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
4902 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
4903 Fset_marker (XBUFFER (w
->buffer
)->mark
,
4904 p
->mark
, w
->buffer
);
4906 /* As documented in Fcurrent_window_configuration, don't
4907 save the location of point in the buffer which was current
4908 when the window configuration was recorded. */
4909 if (!EQ (p
->buffer
, new_current_buffer
)
4910 && XBUFFER (p
->buffer
) == current_buffer
)
4911 Fgoto_char (w
->pointm
);
4913 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
4914 /* Else unless window has a live buffer, get one. */
4916 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
4917 /* This will set the markers to beginning of visible
4919 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
4920 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
4921 w
->start_at_line_beg
= Qt
;
4924 /* Keeping window's old buffer; make sure the markers
4927 /* Set window markers at start of visible range. */
4928 if (XMARKER (w
->start
)->buffer
== 0)
4929 set_marker_restricted (w
->start
, make_number (0),
4931 if (XMARKER (w
->pointm
)->buffer
== 0)
4932 set_marker_restricted_both (w
->pointm
, w
->buffer
,
4933 BUF_PT (XBUFFER (w
->buffer
)),
4934 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4935 w
->start_at_line_beg
= Qt
;
4940 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
4941 /* Prevent "swapping out point" in the old selected window
4942 using the buffer that has been restored into it.
4943 That swapping out has already been done,
4944 near the beginning of this function. */
4945 selected_window
= Qnil
;
4946 Fselect_window (data
->current_window
);
4947 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
4950 if (NILP (data
->focus_frame
)
4951 || (FRAMEP (data
->focus_frame
)
4952 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
4953 Fredirect_frame_focus (frame
, data
->focus_frame
);
4955 #if 0 /* I don't understand why this is needed, and it causes problems
4956 when the frame's old selected window has been deleted. */
4957 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
4958 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
4962 /* Set the screen height to the value it had before this function. */
4963 if (previous_frame_height
!= FRAME_HEIGHT (f
)
4964 || previous_frame_width
!= FRAME_WIDTH (f
))
4965 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
4967 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4968 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
4969 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
4971 #ifdef HAVE_WINDOW_SYSTEM
4972 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
4973 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
4978 /* Now, free glyph matrices in windows that were not reused. */
4979 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
4981 if (NILP (leaf_windows
[i
]->buffer
))
4983 /* Assert it's not reused as a combination. */
4984 xassert (NILP (leaf_windows
[i
]->hchild
)
4985 && NILP (leaf_windows
[i
]->vchild
));
4986 free_window_matrices (leaf_windows
[i
]);
4988 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
4992 /* If more than one window shows the new and old current buffer,
4993 don't try to preserve point in that buffer. */
4994 if (old_point
> 0 && n
> 1)
5001 /* Fselect_window will have made f the selected frame, so we
5002 reselect the proper frame here. Fhandle_switch_frame will change the
5003 selected window too, but that doesn't make the call to
5004 Fselect_window above totally superfluous; it still sets f's
5006 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
5007 do_switch_frame (data
->selected_frame
, Qnil
, 0);
5009 if (! NILP (Vwindow_configuration_change_hook
)
5010 && ! NILP (Vrun_hooks
))
5011 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
5014 if (!NILP (new_current_buffer
))
5016 Fset_buffer (new_current_buffer
);
5018 /* If the buffer that is current now is the same
5019 that was current before setting the window configuration,
5020 don't alter its PT. */
5025 /* Restore the minimum heights recorded in the configuration. */
5026 window_min_height
= XINT (data
->min_height
);
5027 window_min_width
= XINT (data
->min_width
);
5029 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
5031 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
5034 /* Mark all windows now on frame as deleted
5035 by setting their buffers to nil. */
5038 delete_all_subwindows (w
)
5039 register struct window
*w
;
5041 if (!NILP (w
->next
))
5042 delete_all_subwindows (XWINDOW (w
->next
));
5043 if (!NILP (w
->vchild
))
5044 delete_all_subwindows (XWINDOW (w
->vchild
));
5045 if (!NILP (w
->hchild
))
5046 delete_all_subwindows (XWINDOW (w
->hchild
));
5048 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
5050 if (!NILP (w
->buffer
))
5053 /* We set all three of these fields to nil, to make sure that we can
5054 distinguish this dead window from any live window. Live leaf
5055 windows will have buffer set, and combination windows will have
5056 vchild or hchild set. */
5061 Vwindow_list
= Qnil
;
5065 count_windows (window
)
5066 register struct window
*window
;
5068 register int count
= 1;
5069 if (!NILP (window
->next
))
5070 count
+= count_windows (XWINDOW (window
->next
));
5071 if (!NILP (window
->vchild
))
5072 count
+= count_windows (XWINDOW (window
->vchild
));
5073 if (!NILP (window
->hchild
))
5074 count
+= count_windows (XWINDOW (window
->hchild
));
5079 /* Fill vector FLAT with leaf windows under W, starting at index I.
5080 Value is last index + 1. */
5083 get_leaf_windows (w
, flat
, i
)
5085 struct window
**flat
;
5090 if (!NILP (w
->hchild
))
5091 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
5092 else if (!NILP (w
->vchild
))
5093 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
5097 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5104 /* Return a pointer to the glyph W's physical cursor is on. Value is
5105 null if W's current matrix is invalid, so that no meaningfull glyph
5109 get_phys_cursor_glyph (w
)
5112 struct glyph_row
*row
;
5113 struct glyph
*glyph
;
5115 if (w
->phys_cursor
.vpos
>= 0
5116 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
5117 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
5119 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
5120 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
5129 save_window_save (window
, vector
, i
)
5131 struct Lisp_Vector
*vector
;
5134 register struct saved_window
*p
;
5135 register struct window
*w
;
5136 register Lisp_Object tem
;
5138 for (;!NILP (window
); window
= w
->next
)
5140 p
= SAVED_WINDOW_N (vector
, i
);
5141 w
= XWINDOW (window
);
5143 XSETFASTINT (w
->temslot
, i
++);
5145 p
->buffer
= w
->buffer
;
5148 p
->width
= w
->width
;
5149 p
->height
= w
->height
;
5150 p
->hscroll
= w
->hscroll
;
5151 p
->min_hscroll
= w
->min_hscroll
;
5152 p
->display_table
= w
->display_table
;
5153 p
->orig_top
= w
->orig_top
;
5154 p
->orig_height
= w
->orig_height
;
5155 if (!NILP (w
->buffer
))
5157 /* Save w's value of point in the window configuration.
5158 If w is the selected window, then get the value of point
5159 from the buffer; pointm is garbage in the selected window. */
5160 if (EQ (window
, selected_window
))
5162 p
->pointm
= Fmake_marker ();
5163 set_marker_both (p
->pointm
, w
->buffer
,
5164 BUF_PT (XBUFFER (w
->buffer
)),
5165 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5168 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
5170 p
->start
= Fcopy_marker (w
->start
, Qnil
);
5171 p
->start_at_line_beg
= w
->start_at_line_beg
;
5173 tem
= XBUFFER (w
->buffer
)->mark
;
5174 p
->mark
= Fcopy_marker (tem
, Qnil
);
5181 p
->start_at_line_beg
= Qnil
;
5184 if (NILP (w
->parent
))
5187 p
->parent
= XWINDOW (w
->parent
)->temslot
;
5192 p
->prev
= XWINDOW (w
->prev
)->temslot
;
5194 if (!NILP (w
->vchild
))
5195 i
= save_window_save (w
->vchild
, vector
, i
);
5196 if (!NILP (w
->hchild
))
5197 i
= save_window_save (w
->hchild
, vector
, i
);
5203 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
5204 Scurrent_window_configuration
, 0, 1, 0,
5205 "Return an object representing the current window configuration of FRAME.\n\
5206 If FRAME is nil or omitted, use the selected frame.\n\
5207 This describes the number of windows, their sizes and current buffers,\n\
5208 and for each displayed buffer, where display starts, and the positions of\n\
5209 point and mark. An exception is made for point in the current buffer:\n\
5210 its value is -not- saved.\n\
5211 This also records the currently selected frame, and FRAME's focus\n\
5212 redirection (see `redirect-frame-focus').")
5216 register Lisp_Object tem
;
5217 register int n_windows
;
5218 register struct save_window_data
*data
;
5219 register struct Lisp_Vector
*vec
;
5224 frame
= selected_frame
;
5225 CHECK_LIVE_FRAME (frame
, 0);
5228 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5229 vec
= allocate_vectorlike (VECSIZE (struct save_window_data
));
5230 for (i
= 0; i
< VECSIZE (struct save_window_data
); i
++)
5231 vec
->contents
[i
] = Qnil
;
5232 vec
->size
= VECSIZE (struct save_window_data
);
5233 data
= (struct save_window_data
*)vec
;
5235 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
5236 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
5237 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
5238 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
5239 data
->selected_frame
= selected_frame
;
5240 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
5241 XSETBUFFER (data
->current_buffer
, current_buffer
);
5242 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
5243 data
->root_window
= FRAME_ROOT_WINDOW (f
);
5244 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
5245 XSETINT (data
->min_height
, window_min_height
);
5246 XSETINT (data
->min_width
, window_min_width
);
5247 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
5248 data
->saved_windows
= tem
;
5249 for (i
= 0; i
< n_windows
; i
++)
5250 XVECTOR (tem
)->contents
[i
]
5251 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
5252 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
5253 XSETWINDOW_CONFIGURATION (tem
, data
);
5257 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
5259 "Execute body, preserving window sizes and contents.\n\
5260 Restore which buffer appears in which window, where display starts,\n\
5261 and the value of point and mark for each window.\n\
5262 Also restore the choice of selected window.\n\
5263 Also restore which buffer is current.\n\
5264 Does not restore the value of point in current buffer.")
5268 register Lisp_Object val
;
5269 register int count
= specpdl_ptr
- specpdl
;
5271 record_unwind_protect (Fset_window_configuration
,
5272 Fcurrent_window_configuration (Qnil
));
5273 val
= Fprogn (args
);
5274 return unbind_to (count
, val
);
5278 /***********************************************************************
5280 ***********************************************************************/
5282 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
5284 "Set width of marginal areas of window WINDOW.\n\
5285 If window is nil, set margins of the currently selected window.\n\
5286 First parameter LEFT-WIDTH specifies the number of character\n\
5287 cells to reserve for the left marginal area. Second parameter\n\
5288 RIGHT-WIDTH does the same for the right marginal area.\n\
5289 A nil width parameter means no margin.")
5290 (window
, left
, right
)
5291 Lisp_Object window
, left
, right
;
5293 struct window
*w
= decode_window (window
);
5296 CHECK_NUMBER_OR_FLOAT (left
, 1);
5298 CHECK_NUMBER_OR_FLOAT (right
, 2);
5300 /* Check widths < 0 and translate a zero width to nil.
5301 Margins that are too wide have to be checked elsewhere. */
5302 if ((INTEGERP (left
) && XINT (left
) < 0)
5303 || (FLOATP (left
) && XFLOAT_DATA (left
) <= 0))
5304 XSETFASTINT (left
, 0);
5305 if (INTEGERP (left
) && XFASTINT (left
) == 0)
5308 if ((INTEGERP (right
) && XINT (right
) < 0)
5309 || (FLOATP (right
) && XFLOAT_DATA (right
) <= 0))
5310 XSETFASTINT (right
, 0);
5311 if (INTEGERP (right
) && XFASTINT (right
) == 0)
5314 w
->left_margin_width
= left
;
5315 w
->right_margin_width
= right
;
5317 ++windows_or_buffers_changed
;
5318 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
5323 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
5325 "Get width of marginal areas of window WINDOW.\n\
5326 If WINDOW is omitted or nil, use the currently selected window.\n\
5327 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).\n\
5328 If a marginal area does not exist, its width will be returned\n\
5333 struct window
*w
= decode_window (window
);
5334 return Fcons (w
->left_margin_width
, w
->right_margin_width
);
5339 /***********************************************************************
5341 ***********************************************************************/
5343 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 1, 0,
5344 "Return the amount by which WINDOW is scrolled vertically.\n\
5345 Use the selected window if WINDOW is nil or omitted.\n\
5346 Value is a multiple of the canonical character height of WINDOW.")
5355 window
= selected_window
;
5357 CHECK_WINDOW (window
, 0);
5358 w
= XWINDOW (window
);
5359 f
= XFRAME (w
->frame
);
5361 if (FRAME_WINDOW_P (f
))
5362 result
= CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
);
5364 result
= make_number (0);
5369 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
5371 "Set amount by which WINDOW should be scrolled vertically to VSCROLL.\n\
5372 WINDOW nil or omitted means use the selected window. VSCROLL is a\n\
5373 non-negative multiple of the canonical character height of WINDOW.")
5375 Lisp_Object window
, vscroll
;
5381 window
= selected_window
;
5383 CHECK_WINDOW (window
, 0);
5384 CHECK_NUMBER_OR_FLOAT (vscroll
, 1);
5386 w
= XWINDOW (window
);
5387 f
= XFRAME (w
->frame
);
5389 if (FRAME_WINDOW_P (f
))
5391 int old_dy
= w
->vscroll
;
5393 w
->vscroll
= - CANON_Y_UNIT (f
) * XFLOATINT (vscroll
);
5394 w
->vscroll
= min (w
->vscroll
, 0);
5396 /* Adjust glyph matrix of the frame if the virtual display
5397 area becomes larger than before. */
5398 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
5401 /* Prevent redisplay shortcuts. */
5402 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5405 return Fwindow_vscroll (window
);
5409 /* Call FN for all leaf windows on frame F. FN is called with the
5410 first argument being a pointer to the leaf window, and with
5411 additional argument USER_DATA. Stops when FN returns 0. */
5414 foreach_window (f
, fn
, user_data
)
5416 int (* fn
) P_ ((struct window
*, void *));
5419 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
5423 /* Helper function for foreach_window. Call FN for all leaf windows
5424 reachable from W. FN is called with the first argument being a
5425 pointer to the leaf window, and with additional argument USER_DATA.
5426 Stop when FN returns 0. Value is 0 if stopped by FN. */
5429 foreach_window_1 (w
, fn
, user_data
)
5431 int (* fn
) P_ ((struct window
*, void *));
5436 for (cont
= 1; w
&& cont
;)
5438 if (!NILP (w
->hchild
))
5439 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
5440 else if (!NILP (w
->vchild
))
5441 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
5443 cont
= fn (w
, user_data
);
5445 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5452 /* Freeze or unfreeze the window start of W if unless it is a
5453 mini-window or the selected window. FREEZE_P non-null means freeze
5454 the window start. */
5457 freeze_window_start (w
, freeze_p
)
5461 if (w
== XWINDOW (selected_window
)
5462 || MINI_WINDOW_P (w
)
5463 || (MINI_WINDOW_P (XWINDOW (selected_window
))
5464 && ! NILP (Vminibuf_scroll_window
)
5465 && w
== XWINDOW (Vminibuf_scroll_window
)))
5468 w
->frozen_window_start_p
= freeze_p
!= NULL
;
5473 /* Freeze or unfreeze the window starts of all leaf windows on frame
5474 F, except the selected window and a mini-window. FREEZE_P non-zero
5475 means freeze the window start. */
5478 freeze_window_starts (f
, freeze_p
)
5482 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
5486 /***********************************************************************
5488 ***********************************************************************/
5490 /* Return 1 if window configurations C1 and C2
5491 describe the same state of affairs. This is used by Fequal. */
5494 compare_window_configurations (c1
, c2
, ignore_positions
)
5496 int ignore_positions
;
5498 register struct save_window_data
*d1
, *d2
;
5499 struct Lisp_Vector
*sw1
, *sw2
;
5502 if (!WINDOW_CONFIGURATIONP (c1
))
5503 wrong_type_argument (Qwindow_configuration_p
, c1
);
5504 if (!WINDOW_CONFIGURATIONP (c2
))
5505 wrong_type_argument (Qwindow_configuration_p
, c2
);
5507 d1
= (struct save_window_data
*) XVECTOR (c1
);
5508 d2
= (struct save_window_data
*) XVECTOR (c2
);
5509 sw1
= XVECTOR (d1
->saved_windows
);
5510 sw2
= XVECTOR (d2
->saved_windows
);
5512 if (! EQ (d1
->frame_width
, d2
->frame_width
))
5514 if (! EQ (d1
->frame_height
, d2
->frame_height
))
5516 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
5518 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
5520 /* Don't compare the current_window field directly.
5521 Instead see w1_is_current and w2_is_current, below. */
5522 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
5524 if (! ignore_positions
)
5525 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
5527 /* Don't compare the root_window field.
5528 We don't require the two configurations
5529 to use the same window object,
5530 and the two root windows must be equivalent
5531 if everything else compares equal. */
5532 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
5534 if (! EQ (d1
->min_width
, d2
->min_width
))
5536 if (! EQ (d1
->min_height
, d2
->min_height
))
5539 /* Verify that the two confis have the same number of windows. */
5540 if (sw1
->size
!= sw2
->size
)
5543 for (i
= 0; i
< sw1
->size
; i
++)
5545 struct saved_window
*p1
, *p2
;
5546 int w1_is_current
, w2_is_current
;
5548 p1
= SAVED_WINDOW_N (sw1
, i
);
5549 p2
= SAVED_WINDOW_N (sw2
, i
);
5551 /* Verify that the current windows in the two
5552 configurations correspond to each other. */
5553 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
5554 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
5556 if (w1_is_current
!= w2_is_current
)
5559 /* Verify that the corresponding windows do match. */
5560 if (! EQ (p1
->buffer
, p2
->buffer
))
5562 if (! EQ (p1
->left
, p2
->left
))
5564 if (! EQ (p1
->top
, p2
->top
))
5566 if (! EQ (p1
->width
, p2
->width
))
5568 if (! EQ (p1
->height
, p2
->height
))
5570 if (! EQ (p1
->display_table
, p2
->display_table
))
5572 if (! EQ (p1
->parent
, p2
->parent
))
5574 if (! EQ (p1
->prev
, p2
->prev
))
5576 if (! ignore_positions
)
5578 if (! EQ (p1
->hscroll
, p2
->hscroll
))
5580 if (!EQ (p1
->min_hscroll
, p2
->min_hscroll
))
5582 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
5584 if (NILP (Fequal (p1
->start
, p2
->start
)))
5586 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
5588 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
5596 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
5597 Scompare_window_configurations
, 2, 2, 0,
5598 "Compare two window configurations as regards the structure of windows.\n\
5599 This function ignores details such as the values of point and mark\n\
5600 and scrolling positions.")
5604 if (compare_window_configurations (x
, y
, 1))
5612 struct frame
*f
= make_terminal_frame ();
5613 XSETFRAME (selected_frame
, f
);
5614 Vterminal_frame
= selected_frame
;
5615 minibuf_window
= f
->minibuffer_window
;
5616 selected_window
= f
->selected_window
;
5617 last_nonminibuf_frame
= f
;
5619 window_initialized
= 1;
5625 Vwindow_list
= Qnil
;
5631 Qleft_bitmap_area
= intern ("left-bitmap-area");
5632 staticpro (&Qleft_bitmap_area
);
5633 Qright_bitmap_area
= intern ("right-bitmap-area");
5634 staticpro (&Qright_bitmap_area
);
5636 Qwindow_size_fixed
= intern ("window-size-fixed");
5637 staticpro (&Qwindow_size_fixed
);
5639 staticpro (&Qwindow_configuration_change_hook
);
5640 Qwindow_configuration_change_hook
5641 = intern ("window-configuration-change-hook");
5643 Qwindowp
= intern ("windowp");
5644 staticpro (&Qwindowp
);
5646 Qwindow_configuration_p
= intern ("window-configuration-p");
5647 staticpro (&Qwindow_configuration_p
);
5649 Qwindow_live_p
= intern ("window-live-p");
5650 staticpro (&Qwindow_live_p
);
5652 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
5653 staticpro (&Qtemp_buffer_show_hook
);
5655 staticpro (&Vwindow_list
);
5657 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
5658 "Non-nil means call as function to display a help buffer.\n\
5659 The function is called with one argument, the buffer to be displayed.\n\
5660 Used by `with-output-to-temp-buffer'.\n\
5661 If this function is used, then it must do the entire job of showing\n\
5662 the buffer; `temp-buffer-show-hook' is not run unless this function runs it.");
5663 Vtemp_buffer_show_function
= Qnil
;
5665 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
5666 "If non-nil, function to call to handle `display-buffer'.\n\
5667 It will receive two args, the buffer and a flag which if non-nil means\n\
5668 that the currently selected window is not acceptable.\n\
5669 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
5670 work using this function.");
5671 Vdisplay_buffer_function
= Qnil
;
5673 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
5674 "*If non-nil, `display-buffer' should even the window heights.\n\
5675 If nil, `display-buffer' will leave the window configuration alone.");
5676 Veven_window_heights
= Qt
;
5678 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
5679 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
5680 Vminibuf_scroll_window
= Qnil
;
5682 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
5683 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
5684 Vother_window_scroll_buffer
= Qnil
;
5686 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
5687 "*Non-nil means `display-buffer' should make a separate frame.");
5690 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
5691 "*Non-nil means `display-buffer' should reuse frames.\n\
5692 If the buffer in question is already displayed in a frame, raise that frame.");
5693 display_buffer_reuse_frames
= 0;
5695 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
5696 "Function to call to handle automatic new frame creation.\n\
5697 It is called with no arguments and should return a newly created frame.\n\
5699 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
5700 where `pop-up-frame-alist' would hold the default frame parameters.");
5701 Vpop_up_frame_function
= Qnil
;
5703 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
5704 "*List of buffer names that should have their own special frames.\n\
5705 Displaying a buffer whose name is in this list makes a special frame for it\n\
5706 using `special-display-function'. See also `special-display-regexps'.\n\
5708 An element of the list can be a list instead of just a string.\n\
5709 There are two ways to use a list as an element:\n\
5710 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\
5711 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5712 In the latter case, FUNCTION is called with BUFFER as the first argument,\n\
5713 followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\
5714 All this is done by the function found in `special-display-function'.\n\
5716 If this variable appears \"not to work\", because you add a name to it\n\
5717 but that buffer still appears in the selected window, look at the\n\
5718 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5719 Those variables take precedence over this one.");
5720 Vspecial_display_buffer_names
= Qnil
;
5722 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
5723 "*List of regexps saying which buffers should have their own special frames.\n\
5724 If a buffer name matches one of these regexps, it gets its own frame.\n\
5725 Displaying a buffer whose name is in this list makes a special frame for it\n\
5726 using `special-display-function'.\n\
5728 An element of the list can be a list instead of just a string.\n\
5729 There are two ways to use a list as an element:\n\
5730 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\
5731 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5732 In the latter case, FUNCTION is called with the buffer as first argument,\n\
5733 followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\
5734 All this is done by the function found in `special-display-function'.\n\
5736 If this variable appears \"not to work\", because you add a regexp to it\n\
5737 but the matching buffers still appear in the selected window, look at the\n\
5738 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5739 Those variables take precedence over this one.");
5740 Vspecial_display_regexps
= Qnil
;
5742 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
5743 "Function to call to make a new frame for a special buffer.\n\
5744 It is called with two arguments, the buffer and optional buffer specific\n\
5745 data, and should return a window displaying that buffer.\n\
5746 The default value makes a separate frame for the buffer,\n\
5747 using `special-display-frame-alist' to specify the frame parameters.\n\
5749 A buffer is special if its is listed in `special-display-buffer-names'\n\
5750 or matches a regexp in `special-display-regexps'.");
5751 Vspecial_display_function
= Qnil
;
5753 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
5754 "*List of buffer names that should appear in the selected window.\n\
5755 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\
5756 switches to it in the selected window, rather than making it appear\n\
5757 in some other window.\n\
5759 An element of the list can be a cons cell instead of just a string.\n\
5760 Then the car must be a string, which specifies the buffer name.\n\
5761 This is for compatibility with `special-display-buffer-names';\n\
5762 the cdr of the cons cell is ignored.\n\
5764 See also `same-window-regexps'.");
5765 Vsame_window_buffer_names
= Qnil
;
5767 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
5768 "*List of regexps saying which buffers should appear in the selected window.\n\
5769 If a buffer name matches one of these regexps, then displaying it\n\
5770 using `display-buffer' or `pop-to-buffer' switches to it\n\
5771 in the selected window, rather than making it appear in some other window.\n\
5773 An element of the list can be a cons cell instead of just a string.\n\
5774 Then the car must be a string, which specifies the buffer name.\n\
5775 This is for compatibility with `special-display-buffer-names';\n\
5776 the cdr of the cons cell is ignored.\n\
5778 See also `same-window-buffer-names'.");
5779 Vsame_window_regexps
= Qnil
;
5781 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
5782 "*Non-nil means display-buffer should make new windows.");
5785 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
5786 "*Number of lines of continuity when scrolling by screenfuls.");
5787 next_screen_context_lines
= 2;
5789 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
5790 "*display-buffer would prefer to split the largest window if this large.\n\
5791 If there is only one window, it is split regardless of this value.");
5792 split_height_threshold
= 500;
5794 DEFVAR_INT ("window-min-height", &window_min_height
,
5795 "*Delete any window less than this tall (including its mode line).");
5796 window_min_height
= 4;
5798 DEFVAR_INT ("window-min-width", &window_min_width
,
5799 "*Delete any window less than this wide.");
5800 window_min_width
= 10;
5802 DEFVAR_LISP ("scroll-preserve-screen-position",
5803 &Vscroll_preserve_screen_position
,
5804 "*Non-nil means scroll commands move point to keep its screen line unchanged.");
5805 Vscroll_preserve_screen_position
= Qnil
;
5807 DEFVAR_LISP ("window-configuration-change-hook",
5808 &Vwindow_configuration_change_hook
,
5809 "Functions to call when window configuration changes.\n\
5810 The selected frame is the one whose configuration has changed.");
5811 Vwindow_configuration_change_hook
= Qnil
;
5813 DEFVAR_BOOL ("window-size-fixed", &window_size_fixed
,
5814 "Non-nil in a buffer means windows displaying the buffer are fixed-size.\n\
5815 Emacs won't change the size of any window displaying that buffer,\n\
5816 unless you explicitly change the size, or Emacs has no other choice.\n\
5817 This variable automatically becomes buffer-local when set.");
5818 Fmake_variable_buffer_local (Qwindow_size_fixed
);
5819 window_size_fixed
= 0;
5821 defsubr (&Sselected_window
);
5822 defsubr (&Sminibuffer_window
);
5823 defsubr (&Swindow_minibuffer_p
);
5824 defsubr (&Swindowp
);
5825 defsubr (&Swindow_live_p
);
5826 defsubr (&Spos_visible_in_window_p
);
5827 defsubr (&Swindow_buffer
);
5828 defsubr (&Swindow_height
);
5829 defsubr (&Swindow_width
);
5830 defsubr (&Swindow_hscroll
);
5831 defsubr (&Sset_window_hscroll
);
5832 defsubr (&Swindow_redisplay_end_trigger
);
5833 defsubr (&Sset_window_redisplay_end_trigger
);
5834 defsubr (&Swindow_edges
);
5835 defsubr (&Scoordinates_in_window_p
);
5836 defsubr (&Swindow_at
);
5837 defsubr (&Swindow_point
);
5838 defsubr (&Swindow_start
);
5839 defsubr (&Swindow_end
);
5840 defsubr (&Sset_window_point
);
5841 defsubr (&Sset_window_start
);
5842 defsubr (&Swindow_dedicated_p
);
5843 defsubr (&Sset_window_dedicated_p
);
5844 defsubr (&Swindow_display_table
);
5845 defsubr (&Sset_window_display_table
);
5846 defsubr (&Snext_window
);
5847 defsubr (&Sprevious_window
);
5848 defsubr (&Sother_window
);
5849 defsubr (&Sget_lru_window
);
5850 defsubr (&Sget_largest_window
);
5851 defsubr (&Sget_buffer_window
);
5852 defsubr (&Sdelete_other_windows
);
5853 defsubr (&Sdelete_windows_on
);
5854 defsubr (&Sreplace_buffer_in_windows
);
5855 defsubr (&Sdelete_window
);
5856 defsubr (&Sset_window_buffer
);
5857 defsubr (&Sselect_window
);
5858 defsubr (&Sspecial_display_p
);
5859 defsubr (&Ssame_window_p
);
5860 defsubr (&Sdisplay_buffer
);
5861 defsubr (&Ssplit_window
);
5862 defsubr (&Senlarge_window
);
5863 defsubr (&Sshrink_window
);
5864 defsubr (&Sscroll_up
);
5865 defsubr (&Sscroll_down
);
5866 defsubr (&Sscroll_left
);
5867 defsubr (&Sscroll_right
);
5868 defsubr (&Sother_window_for_scrolling
);
5869 defsubr (&Sscroll_other_window
);
5870 defsubr (&Srecenter
);
5871 defsubr (&Swindow_text_height
);
5872 defsubr (&Smove_to_window_line
);
5873 defsubr (&Swindow_configuration_p
);
5874 defsubr (&Swindow_configuration_frame
);
5875 defsubr (&Sset_window_configuration
);
5876 defsubr (&Scurrent_window_configuration
);
5877 defsubr (&Ssave_window_excursion
);
5878 defsubr (&Sset_window_margins
);
5879 defsubr (&Swindow_margins
);
5880 defsubr (&Swindow_vscroll
);
5881 defsubr (&Sset_window_vscroll
);
5882 defsubr (&Scompare_window_configurations
);
5883 defsubr (&Swindow_list
);
5889 initial_define_key (control_x_map
, '1', "delete-other-windows");
5890 initial_define_key (control_x_map
, '2', "split-window");
5891 initial_define_key (control_x_map
, '0', "delete-window");
5892 initial_define_key (control_x_map
, 'o', "other-window");
5893 initial_define_key (control_x_map
, '^', "enlarge-window");
5894 initial_define_key (control_x_map
, '<', "scroll-left");
5895 initial_define_key (control_x_map
, '>', "scroll-right");
5897 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
5898 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
5899 initial_define_key (meta_map
, 'v', "scroll-down");
5901 initial_define_key (global_map
, Ctl('L'), "recenter");
5902 initial_define_key (meta_map
, 'r', "move-to-window-line");