1 /* Window creation, deletion and examination for GNU Emacs.
2 Does not include redisplay.
3 Copyright (C) 1985,86,87,93,94,95,96,97,1998,2000
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
33 #include "dispextern.h"
34 #include "blockinput.h"
35 #include "intervals.h"
39 #endif /* HAVE_X_WINDOWS */
51 #define max(a, b) ((a) < (b) ? (b) : (a))
55 Lisp_Object Qwindowp
, Qwindow_live_p
, Qwindow_configuration_p
;
56 Lisp_Object Qwindow_size_fixed
, Qleft_bitmap_area
, Qright_bitmap_area
;
57 extern Lisp_Object Qheight
, Qwidth
;
59 static struct window
*decode_window
P_ ((Lisp_Object
));
60 static Lisp_Object select_window_1
P_ ((Lisp_Object
, int));
61 static int count_windows
P_ ((struct window
*));
62 static int get_leaf_windows
P_ ((struct window
*, struct window
**, int));
63 static void window_scroll
P_ ((Lisp_Object
, int, int, int));
64 static void window_scroll_pixel_based
P_ ((Lisp_Object
, int, int, int));
65 static void window_scroll_line_based
P_ ((Lisp_Object
, int, int, int));
66 static int window_min_size_1
P_ ((struct window
*, int));
67 static int window_min_size
P_ ((struct window
*, int, int, int *));
68 static void size_window
P_ ((Lisp_Object
, int, int, int));
69 static int freeze_window_start
P_ ((struct window
*, void *));
70 static int window_fixed_size_p
P_ ((struct window
*, int, int));
71 static void enlarge_window
P_ ((Lisp_Object
, int, int));
72 static Lisp_Object window_list
P_ ((void));
73 static int add_window_to_list
P_ ((struct window
*, void *));
74 static int candidate_window_p
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
,
76 static Lisp_Object next_window
P_ ((Lisp_Object
, Lisp_Object
,
78 static void decode_next_window_args
P_ ((Lisp_Object
*, Lisp_Object
*,
80 static int foreach_window_1
P_ ((struct window
*,
81 int (* fn
) (struct window
*, void *),
83 static Lisp_Object window_list_1
P_ ((Lisp_Object
, Lisp_Object
, Lisp_Object
));
85 /* This is the window in which the terminal's cursor should
86 be left when nothing is being done with it. This must
87 always be a leaf window, and its buffer is selected by
88 the top level editing loop at the end of each command.
90 This value is always the same as
91 FRAME_SELECTED_WINDOW (selected_frame). */
93 Lisp_Object selected_window
;
95 /* A list of all windows for use by next_window and Fwindow_list.
96 Functions creating or deleting windows should invalidate this cache
97 by setting it to nil. */
99 Lisp_Object Vwindow_list
;
101 /* The mini-buffer window of the selected frame.
102 Note that you cannot test for mini-bufferness of an arbitrary window
103 by comparing against this; but you can test for mini-bufferness of
104 the selected window. */
106 Lisp_Object minibuf_window
;
108 /* Non-nil means it is the window for C-M-v to scroll
109 when the mini-buffer is selected. */
111 Lisp_Object Vminibuf_scroll_window
;
113 /* Non-nil means this is the buffer whose window C-M-v should scroll. */
115 Lisp_Object Vother_window_scroll_buffer
;
117 /* Non-nil means it's function to call to display temp buffers. */
119 Lisp_Object Vtemp_buffer_show_function
;
121 /* If a window gets smaller than either of these, it is removed. */
123 int window_min_height
;
124 int window_min_width
;
126 /* Nonzero implies Fdisplay_buffer should create windows. */
130 /* Nonzero implies make new frames for Fdisplay_buffer. */
134 /* Nonzero means reuse existing frames for displaying buffers. */
136 int display_buffer_reuse_frames
;
138 /* Non-nil means use this function instead of default */
140 Lisp_Object Vpop_up_frame_function
;
142 /* Function to call to handle Fdisplay_buffer. */
144 Lisp_Object Vdisplay_buffer_function
;
146 /* Non-nil means that Fdisplay_buffer should even the heights of windows. */
148 Lisp_Object Veven_window_heights
;
150 /* List of buffer *names* for buffers that should have their own frames. */
152 Lisp_Object Vspecial_display_buffer_names
;
154 /* List of regexps for buffer names that should have their own frames. */
156 Lisp_Object Vspecial_display_regexps
;
158 /* Function to pop up a special frame. */
160 Lisp_Object Vspecial_display_function
;
162 /* List of buffer *names* for buffers to appear in selected window. */
164 Lisp_Object Vsame_window_buffer_names
;
166 /* List of regexps for buffer names to appear in selected window. */
168 Lisp_Object Vsame_window_regexps
;
170 /* Hook run at end of temp_output_buffer_show. */
172 Lisp_Object Qtemp_buffer_show_hook
;
174 /* Fdisplay_buffer always splits the largest window
175 if that window is more than this high. */
177 int split_height_threshold
;
179 /* Number of lines of continuity in scrolling by screenfuls. */
181 int next_screen_context_lines
;
183 /* Incremented for each window created. */
185 static int sequence_number
;
187 /* Nonzero after init_window_once has finished. */
189 static int window_initialized
;
191 /* Hook to run when window config changes. */
193 Lisp_Object Qwindow_configuration_change_hook
;
194 Lisp_Object Vwindow_configuration_change_hook
;
196 /* Nonzero means scroll commands try to put point
197 at the same screen height as previously. */
199 Lisp_Object Vscroll_preserve_screen_position
;
201 #if 0 /* This isn't used anywhere. */
202 /* Nonzero means we can split a frame even if it is "unsplittable". */
203 static int inhibit_frame_unsplittable
;
206 #define min(a, b) ((a) < (b) ? (a) : (b))
208 extern int scroll_margin
;
210 extern Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
212 DEFUN ("windowp", Fwindowp
, Swindowp
, 1, 1, 0,
213 "Returns t if OBJECT is a window.")
217 return WINDOWP (object
) ? Qt
: Qnil
;
220 DEFUN ("window-live-p", Fwindow_live_p
, Swindow_live_p
, 1, 1, 0,
221 "Returns t if OBJECT is a window which is currently visible.")
225 return (WINDOWP (object
) && ! NILP (XWINDOW (object
)->buffer
) ? Qt
: Qnil
);
232 register struct window
*p
;
233 register struct Lisp_Vector
*vec
;
236 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct window
));
237 for (i
= 0; i
< VECSIZE (struct window
); i
++)
238 vec
->contents
[i
] = Qnil
;
239 vec
->size
= VECSIZE (struct window
);
240 p
= (struct window
*) vec
;
241 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
242 XSETFASTINT (p
->left
, 0);
243 XSETFASTINT (p
->top
, 0);
244 XSETFASTINT (p
->height
, 0);
245 XSETFASTINT (p
->width
, 0);
246 XSETFASTINT (p
->hscroll
, 0);
247 p
->orig_top
= p
->orig_height
= Qnil
;
248 p
->start
= Fmake_marker ();
249 p
->pointm
= Fmake_marker ();
250 XSETFASTINT (p
->use_time
, 0);
252 p
->display_table
= Qnil
;
254 p
->pseudo_window_p
= 0;
255 bzero (&p
->cursor
, sizeof (p
->cursor
));
256 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
257 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
258 p
->desired_matrix
= p
->current_matrix
= 0;
259 p
->phys_cursor_type
= -1;
260 p
->must_be_updated_p
= 0;
261 XSETFASTINT (p
->window_end_vpos
, 0);
262 XSETFASTINT (p
->window_end_pos
, 0);
263 p
->window_end_valid
= Qnil
;
266 XSETFASTINT (p
->last_point
, 0);
267 p
->frozen_window_start_p
= 0;
273 DEFUN ("selected-window", Fselected_window
, Sselected_window
, 0, 0, 0,
274 "Return the window that the cursor now appears in and commands apply to.")
277 return selected_window
;
280 DEFUN ("minibuffer-window", Fminibuffer_window
, Sminibuffer_window
, 0, 1, 0,
281 "Return the window used now for minibuffers.\n\
282 If the optional argument FRAME is specified, return the minibuffer window\n\
283 used by that frame.")
288 frame
= selected_frame
;
289 CHECK_LIVE_FRAME (frame
, 0);
290 return FRAME_MINIBUF_WINDOW (XFRAME (frame
));
293 DEFUN ("window-minibuffer-p", Fwindow_minibuffer_p
, Swindow_minibuffer_p
, 0, 1, 0,
294 "Returns non-nil if WINDOW is a minibuffer window.")
298 struct window
*w
= decode_window (window
);
299 return MINI_WINDOW_P (w
) ? Qt
: Qnil
;
303 DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p
,
304 Spos_visible_in_window_p
, 0, 3, 0,
305 "Return t if position POS is currently on the frame in WINDOW.\n\
306 Return nil if that position is scrolled vertically out of view.\n\
307 If a character is only partially visible, nil is returned, unless the\n\
308 optional argument PARTIALLY is non-nil.\n\
309 POS defaults to point in WINDOW; WINDOW defaults to the selected window.")
310 (pos
, window
, partially
)
311 Lisp_Object pos
, window
, partially
;
313 register struct window
*w
;
315 register struct buffer
*buf
;
317 Lisp_Object in_window
;
320 w
= decode_window (window
);
321 buf
= XBUFFER (w
->buffer
);
322 SET_TEXT_POS_FROM_MARKER (top
, w
->start
);
326 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
329 else if (w
== XWINDOW (selected_window
))
332 posint
= XMARKER (w
->pointm
)->charpos
;
334 /* If position is above window start, it's not visible. */
335 if (posint
< CHARPOS (top
))
337 else if (XFASTINT (w
->last_modified
) >= BUF_MODIFF (buf
)
338 && XFASTINT (w
->last_overlay_modified
) >= BUF_OVERLAY_MODIFF (buf
)
339 && posint
< BUF_Z (buf
) - XFASTINT (w
->window_end_pos
))
341 /* If frame is up-to-date, and POSINT is < window end pos, use
342 that info. This doesn't work for POSINT == end pos, because
343 the window end pos is actually the position _after_ the last
344 char in the window. */
345 if (NILP (partially
))
347 pos_visible_p (w
, posint
, &fully_p
, NILP (partially
));
348 in_window
= fully_p
? Qt
: Qnil
;
353 else if (posint
> BUF_ZV (buf
))
355 else if (CHARPOS (top
) < BUF_BEGV (buf
) || CHARPOS (top
) > BUF_ZV (buf
))
356 /* If window start is out of range, do something reasonable. */
360 if (pos_visible_p (w
, posint
, &fully_p
, NILP (partially
)))
361 in_window
= !NILP (partially
) || fully_p
? Qt
: Qnil
;
370 static struct window
*
371 decode_window (window
)
372 register Lisp_Object window
;
375 return XWINDOW (selected_window
);
377 CHECK_LIVE_WINDOW (window
, 0);
378 return XWINDOW (window
);
381 DEFUN ("window-buffer", Fwindow_buffer
, Swindow_buffer
, 0, 1, 0,
382 "Return the buffer that WINDOW is displaying.")
386 return decode_window (window
)->buffer
;
389 DEFUN ("window-height", Fwindow_height
, Swindow_height
, 0, 1, 0,
390 "Return the number of lines in WINDOW (including its mode line).")
394 return decode_window (window
)->height
;
397 DEFUN ("window-width", Fwindow_width
, Swindow_width
, 0, 1, 0,
398 "Return the number of display columns in WINDOW.\n\
399 This is the width that is usable columns available for text in WINDOW.\n\
400 If you want to find out how many columns WINDOW takes up,\n\
401 use (let ((edges (window-edges))) (- (nth 2 edges) (nth 0 edges))).")
405 return make_number (window_internal_width (decode_window (window
)));
408 DEFUN ("window-hscroll", Fwindow_hscroll
, Swindow_hscroll
, 0, 1, 0,
409 "Return the number of columns by which WINDOW is scrolled from left margin.")
413 return decode_window (window
)->hscroll
;
416 DEFUN ("set-window-hscroll", Fset_window_hscroll
, Sset_window_hscroll
, 2, 2, 0,
417 "Set number of columns WINDOW is scrolled from left margin to NCOL.\n\
418 NCOL should be zero or positive.")
420 register Lisp_Object window
, ncol
;
422 register struct window
*w
;
424 CHECK_NUMBER (ncol
, 1);
425 if (XINT (ncol
) < 0) XSETFASTINT (ncol
, 0);
426 w
= decode_window (window
);
427 if (XINT (w
->hscroll
) != XINT (ncol
))
428 /* Prevent redisplay shortcuts */
429 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
434 DEFUN ("window-redisplay-end-trigger", Fwindow_redisplay_end_trigger
,
435 Swindow_redisplay_end_trigger
, 0, 1, 0,
436 "Return WINDOW's redisplay end trigger value.\n\
437 See `set-window-redisplay-end-trigger' for more information.")
441 return decode_window (window
)->redisplay_end_trigger
;
444 DEFUN ("set-window-redisplay-end-trigger", Fset_window_redisplay_end_trigger
,
445 Sset_window_redisplay_end_trigger
, 2, 2, 0,
446 "Set WINDOW's redisplay end trigger value to VALUE.\n\
447 VALUE should be a buffer position (typically a marker) or nil.\n\
448 If it is a buffer position, then if redisplay in WINDOW reaches a position\n\
449 beyond VALUE, the functions in `redisplay-end-trigger-functions' are called\n\
450 with two arguments: WINDOW, and the end trigger value.\n\
451 Afterwards the end-trigger value is reset to nil.")
453 register Lisp_Object window
, value
;
455 register struct window
*w
;
457 w
= decode_window (window
);
458 w
->redisplay_end_trigger
= value
;
462 DEFUN ("window-edges", Fwindow_edges
, Swindow_edges
, 0, 1, 0,
463 "Return a list of the edge coordinates of WINDOW.\n\
464 \(LEFT TOP RIGHT BOTTOM), all relative to 0, 0 at top left corner of frame.\n\
465 RIGHT is one more than the rightmost column used by WINDOW,\n\
466 and BOTTOM is one more than the bottommost row used by WINDOW\n\
471 register struct window
*w
= decode_window (window
);
473 return Fcons (w
->left
, Fcons (w
->top
,
474 Fcons (make_number (WINDOW_RIGHT_EDGE (w
)),
475 Fcons (make_number (XFASTINT (w
->top
)
476 + XFASTINT (w
->height
)),
480 /* Test if the character at column *X, row *Y is within window W.
481 If it is not, return 0;
482 if it is in the window's text area,
483 set *x and *y to its location relative to the upper left corner
486 if it is on the window's modeline, return 2;
487 if it is on the border between the window and its right sibling,
489 if it is on the window's top line, return 4;
490 if it is in the bitmap area to the left/right of the window,
491 return 5 or 6, and convert *X and *Y to window-relative corrdinates.
493 X and Y are frame relative pixel coordinates. */
496 coordinates_in_window (w
, x
, y
)
497 register struct window
*w
;
500 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
501 int left_x
, right_x
, top_y
, bottom_y
;
502 int flags_area_width
= FRAME_LEFT_FLAGS_AREA_WIDTH (f
);
504 /* Let's make this a global enum later, instead of using numbers
506 enum {ON_NOTHING
, ON_TEXT
, ON_MODE_LINE
, ON_VERTICAL_BORDER
,
507 ON_HEADER_LINE
, ON_LEFT_FRINGE
, ON_RIGHT_FRINGE
};
509 /* In what's below, we subtract 1 when computing right_x because we
510 want the rightmost pixel, which is given by left_pixel+width-1. */
511 if (w
->pseudo_window_p
)
514 right_x
= XFASTINT (w
->width
) * CANON_Y_UNIT (f
) - 1;
515 top_y
= WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
);
516 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
520 left_x
= (WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X (w
)
521 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
522 right_x
= WINDOW_DISPLAY_RIGHT_EDGE_PIXEL_X (w
) - 1;
523 top_y
= (WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w
)
524 - FRAME_INTERNAL_BORDER_WIDTH_SAFE (f
));
525 bottom_y
= WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w
);
528 /* On the mode line or header line? If it's near the start of
529 the mode or header line of window that's has a horizontal
530 sibling, say it's on the vertical line. That's to be able
531 to resize windows horizontally in case we're using toolkit
534 if (WINDOW_WANTS_MODELINE_P (w
)
536 && *y
>= bottom_y
- CURRENT_MODE_LINE_HEIGHT (w
))
538 if (!WINDOW_RIGHTMOST_P (w
)
539 && (abs (*x
- ((XFASTINT (w
->left
) + XFASTINT (w
->width
))
541 < CANON_X_UNIT (f
) / 2))
542 return ON_VERTICAL_BORDER
;
546 if (WINDOW_WANTS_HEADER_LINE_P (w
)
548 && *y
< top_y
+ CURRENT_HEADER_LINE_HEIGHT (w
))
550 if (!WINDOW_RIGHTMOST_P (w
)
551 && (abs (*x
- ((XFASTINT (w
->left
) + XFASTINT (w
->width
))
553 < CANON_X_UNIT (f
) / 2))
554 return ON_VERTICAL_BORDER
;
555 return ON_HEADER_LINE
;
558 /* Completely outside anything interesting? */
563 - (FRAME_LEFT_SCROLL_BAR_WIDTH (f
)
565 || *x
> right_x
+ flags_area_width
)
568 if (FRAME_WINDOW_P (f
))
570 if (!w
->pseudo_window_p
571 && !FRAME_HAS_VERTICAL_SCROLL_BARS (f
)
572 && !WINDOW_RIGHTMOST_P (w
)
573 && (abs (*x
- right_x
- flags_area_width
) < CANON_X_UNIT (f
) / 2))
574 return ON_VERTICAL_BORDER
;
576 if (*x
< left_x
|| *x
> right_x
)
578 /* Other lines than the mode line don't include flags areas and
579 scroll bars on the left. */
581 /* Convert X and Y to window-relative pixel coordinates. */
584 return *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
589 /* Need to say "*x > right_x" rather than >=, since on character
590 terminals, the vertical line's x coordinate is right_x. */
591 if (*x
< left_x
|| *x
> right_x
)
593 /* Other lines than the mode line don't include flags areas and
594 scroll bars on the left. */
596 /* Convert X and Y to window-relative pixel coordinates. */
599 return *x
< left_x
? ON_LEFT_FRINGE
: ON_RIGHT_FRINGE
;
602 /* Here, too, "*x > right_x" is because of character terminals. */
603 if (!w
->pseudo_window_p
604 && !WINDOW_RIGHTMOST_P (w
)
605 && *x
> right_x
- CANON_X_UNIT (f
))
606 /* On the border on the right side of the window? Assume that
607 this area begins at RIGHT_X minus a canonical char width. */
608 return ON_VERTICAL_BORDER
;
611 /* Convert X and Y to window-relative pixel coordinates. */
617 DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p
,
618 Scoordinates_in_window_p
, 2, 2, 0,
619 "Return non-nil if COORDINATES are in WINDOW.\n\
620 COORDINATES is a cons of the form (X . Y), X and Y being distances\n\
621 measured in characters from the upper-left corner of the frame.\n\
622 (0 . 0) denotes the character in the upper left corner of the\n\
624 If COORDINATES are in the text portion of WINDOW,\n\
625 the coordinates relative to the window are returned.\n\
626 If they are in the mode line of WINDOW, `mode-line' is returned.\n\
627 If they are in the top mode line of WINDOW, `header-line' is returned.\n\
628 If they are in the bitmap-area to the left of the window,\n\
629 `left-bitmap-area' is returned, if they are in the area on the right of\n\
630 the window, `right-bitmap-area' is returned.\n\
631 If they are on the border between WINDOW and its right sibling,\n\
632 `vertical-line' is returned.")
633 (coordinates
, window
)
634 register Lisp_Object coordinates
, window
;
641 CHECK_LIVE_WINDOW (window
, 0);
642 w
= XWINDOW (window
);
643 f
= XFRAME (w
->frame
);
644 CHECK_CONS (coordinates
, 1);
645 lx
= Fcar (coordinates
);
646 ly
= Fcdr (coordinates
);
647 CHECK_NUMBER_OR_FLOAT (lx
, 1);
648 CHECK_NUMBER_OR_FLOAT (ly
, 1);
649 x
= PIXEL_X_FROM_CANON_X (f
, lx
);
650 y
= PIXEL_Y_FROM_CANON_Y (f
, ly
);
652 switch (coordinates_in_window (w
, &x
, &y
))
654 case 0: /* NOT in window at all. */
657 case 1: /* In text part of window. */
658 /* X and Y are now window relative pixel coordinates.
659 Convert them to canonical char units before returning
661 return Fcons (CANON_X_FROM_PIXEL_X (f
, x
),
662 CANON_Y_FROM_PIXEL_Y (f
, y
));
664 case 2: /* In mode line of window. */
667 case 3: /* On right border of window. */
668 return Qvertical_line
;
674 return Qleft_bitmap_area
;
677 return Qright_bitmap_area
;
685 /* Callback for foreach_window, used in window_from_coordinates.
686 Check if window W contains coordinates specified by USER_DATA which
687 is actually a pointer to a struct check_window_data CW.
689 Check if window W contains coordinates *CW->x and *CW->y. If it
690 does, return W in *CW->window, as Lisp_Object, and return in
691 *CW->part the part of the window under coordinates *X,*Y. Return
692 zero from this function to stop iterating over windows. */
694 struct check_window_data
701 check_window_containing (w
, user_data
)
705 struct check_window_data
*cw
= (struct check_window_data
*) user_data
;
708 found
= coordinates_in_window (w
, cw
->x
, cw
->y
);
711 *cw
->part
= found
- 1;
712 XSETWINDOW (*cw
->window
, w
);
719 /* Find the window containing frame-relative pixel position X/Y and
720 return it as a Lisp_Object. If X, Y is on the window's modeline,
721 set *PART to 1; if it is on the separating line between the window
722 and its right sibling, set it to 2; otherwise set it to 0. If
723 there is no window under X, Y return nil and leave *PART
724 unmodified. TOOL_BAR_P non-zero means detect tool-bar windows.
726 This function was previously implemented with a loop cycling over
727 windows with Fnext_window, and starting with the frame's selected
728 window. It turned out that this doesn't work with an
729 implementation of next_window using Vwindow_list, because
730 FRAME_SELECTED_WINDOW (F) is not always contained in the window
731 tree of F when this function is called asynchronously from
732 note_mouse_highlight. The original loop didn't terminate in this
736 window_from_coordinates (f
, x
, y
, part
, tool_bar_p
)
743 struct check_window_data cw
;
746 cw
.window
= &window
, cw
.x
= &x
, cw
.y
= &y
; cw
.part
= part
;
747 foreach_window (f
, check_window_containing
, &cw
);
749 /* If not found above, see if it's in the tool bar window, if a tool
753 && WINDOWP (f
->tool_bar_window
)
754 && XINT (XWINDOW (f
->tool_bar_window
)->height
) > 0
755 && coordinates_in_window (XWINDOW (f
->tool_bar_window
), &x
, &y
))
758 window
= f
->tool_bar_window
;
764 DEFUN ("window-at", Fwindow_at
, Swindow_at
, 2, 3, 0,
765 "Return window containing coordinates X and Y on FRAME.\n\
766 If omitted, FRAME defaults to the currently selected frame.\n\
767 The top left corner of the frame is considered to be row 0,\n\
770 Lisp_Object x
, y
, frame
;
776 frame
= selected_frame
;
777 CHECK_LIVE_FRAME (frame
, 2);
780 /* Check that arguments are integers or floats. */
781 CHECK_NUMBER_OR_FLOAT (x
, 0);
782 CHECK_NUMBER_OR_FLOAT (y
, 1);
784 return window_from_coordinates (f
,
785 PIXEL_X_FROM_CANON_X (f
, x
),
786 PIXEL_Y_FROM_CANON_Y (f
, y
),
790 DEFUN ("window-point", Fwindow_point
, Swindow_point
, 0, 1, 0,
791 "Return current value of point in WINDOW.\n\
792 For a nonselected window, this is the value point would have\n\
793 if that window were selected.\n\
795 Note that, when WINDOW is the selected window and its buffer\n\
796 is also currently selected, the value returned is the same as (point).\n\
797 It would be more strictly correct to return the `top-level' value\n\
798 of point, outside of any save-excursion forms.\n\
799 But that is hard to define.")
803 register struct window
*w
= decode_window (window
);
805 if (w
== XWINDOW (selected_window
)
806 && current_buffer
== XBUFFER (w
->buffer
))
808 return Fmarker_position (w
->pointm
);
811 DEFUN ("window-start", Fwindow_start
, Swindow_start
, 0, 1, 0,
812 "Return position at which display currently starts in WINDOW.\n\
813 This is updated by redisplay or by calling `set-window-start'.")
817 return Fmarker_position (decode_window (window
)->start
);
820 /* This is text temporarily removed from the doc string below.
822 This function returns nil if the position is not currently known.\n\
823 That happens when redisplay is preempted and doesn't finish.\n\
824 If in that case you want to compute where the end of the window would\n\
825 have been if redisplay had finished, do this:\n\
827 (goto-char (window-start window))\n\
828 (vertical-motion (1- (window-height window)) window)\n\
831 DEFUN ("window-end", Fwindow_end
, Swindow_end
, 0, 2, 0,
832 "Return position at which display currently ends in WINDOW.\n\
833 This is updated by redisplay, when it runs to completion.\n\
834 Simply changing the buffer text or setting `window-start'\n\
835 does not update this value.\n\
836 If UP-TO-DATE is non-nil, compute the up-to-date position\n\
837 if it isn't already recorded.")
839 Lisp_Object window
, update
;
842 struct window
*w
= decode_window (window
);
846 CHECK_BUFFER (buf
, 0);
848 #if 0 /* This change broke some things. We should make it later. */
849 /* If we don't know the end position, return nil.
850 The user can compute it with vertical-motion if he wants to.
851 It would be nicer to do it automatically,
852 but that's so slow that it would probably bother people. */
853 if (NILP (w
->window_end_valid
))
858 && ! (! NILP (w
->window_end_valid
)
859 && XFASTINT (w
->last_modified
) >= MODIFF
))
861 struct text_pos startp
;
864 /* In case W->start is out of the range, use something
865 reasonable. This situation occured when loading a file with
866 `-l' containing a call to `rmail' with subsequent other
867 commands. At the end, W->start happened to be BEG, while
868 rmail had already narrowed the buffer. */
869 if (XMARKER (w
->start
)->charpos
< BEGV
)
870 SET_TEXT_POS (startp
, BEGV
, BEGV_BYTE
);
871 else if (XMARKER (w
->start
)->charpos
> ZV
)
872 SET_TEXT_POS (startp
, ZV
, ZV_BYTE
);
874 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
876 /* Cannot use Fvertical_motion because that function doesn't
877 cope with variable-height lines. */
878 start_display (&it
, w
, startp
);
879 move_it_vertically (&it
, window_box_height (w
));
880 value
= make_number (IT_CHARPOS (it
));
883 XSETINT (value
, BUF_Z (XBUFFER (buf
)) - XFASTINT (w
->window_end_pos
));
888 DEFUN ("set-window-point", Fset_window_point
, Sset_window_point
, 2, 2, 0,
889 "Make point value in WINDOW be at position POS in WINDOW's buffer.")
891 Lisp_Object window
, pos
;
893 register struct window
*w
= decode_window (window
);
895 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
896 if (w
== XWINDOW (selected_window
)
897 && XBUFFER (w
->buffer
) == current_buffer
)
900 set_marker_restricted (w
->pointm
, pos
, w
->buffer
);
905 DEFUN ("set-window-start", Fset_window_start
, Sset_window_start
, 2, 3, 0,
906 "Make display in WINDOW start at position POS in WINDOW's buffer.\n\
907 Optional third arg NOFORCE non-nil inhibits next redisplay\n\
908 from overriding motion of point in order to display at this exact start.")
909 (window
, pos
, noforce
)
910 Lisp_Object window
, pos
, noforce
;
912 register struct window
*w
= decode_window (window
);
914 CHECK_NUMBER_COERCE_MARKER (pos
, 1);
915 set_marker_restricted (w
->start
, pos
, w
->buffer
);
916 /* this is not right, but much easier than doing what is right. */
917 w
->start_at_line_beg
= Qnil
;
920 w
->update_mode_line
= Qt
;
921 XSETFASTINT (w
->last_modified
, 0);
922 XSETFASTINT (w
->last_overlay_modified
, 0);
923 if (!EQ (window
, selected_window
))
924 windows_or_buffers_changed
++;
929 DEFUN ("window-dedicated-p", Fwindow_dedicated_p
, Swindow_dedicated_p
,
931 "Return WINDOW's dedicated object, usually t or nil.\n\
932 See also `set-window-dedicated-p'.")
936 return decode_window (window
)->dedicated
;
939 DEFUN ("set-window-dedicated-p", Fset_window_dedicated_p
,
940 Sset_window_dedicated_p
, 2, 2, 0,
941 "Control whether WINDOW is dedicated to the buffer it displays.\n\
942 If it is dedicated, Emacs will not automatically change\n\
943 which buffer appears in it.\n\
944 The second argument is the new value for the dedication flag;\n\
947 Lisp_Object window
, arg
;
949 register struct window
*w
= decode_window (window
);
959 DEFUN ("window-display-table", Fwindow_display_table
, Swindow_display_table
,
961 "Return the display-table that WINDOW is using.")
965 return decode_window (window
)->display_table
;
968 /* Get the display table for use on window W. This is either W's
969 display table or W's buffer's display table. Ignore the specified
970 tables if they are not valid; if no valid table is specified,
973 struct Lisp_Char_Table
*
974 window_display_table (w
)
977 struct Lisp_Char_Table
*dp
= NULL
;
979 if (DISP_TABLE_P (w
->display_table
))
980 dp
= XCHAR_TABLE (w
->display_table
);
981 else if (BUFFERP (w
->buffer
))
983 struct buffer
*b
= XBUFFER (w
->buffer
);
985 if (DISP_TABLE_P (b
->display_table
))
986 dp
= XCHAR_TABLE (b
->display_table
);
987 else if (DISP_TABLE_P (Vstandard_display_table
))
988 dp
= XCHAR_TABLE (Vstandard_display_table
);
994 DEFUN ("set-window-display-table", Fset_window_display_table
, Sset_window_display_table
, 2, 2, 0,
995 "Set WINDOW's display-table to TABLE.")
997 register Lisp_Object window
, table
;
999 register struct window
*w
;
1001 w
= decode_window (window
);
1002 w
->display_table
= table
;
1006 /* Record info on buffer window w is displaying
1007 when it is about to cease to display that buffer. */
1010 register struct window
*w
;
1017 if (b
!= XMARKER (w
->pointm
)->buffer
)
1021 if (w
== XWINDOW (selected_window
)
1022 || ! EQ (buf
, XWINDOW (selected_window
)->buffer
))
1023 /* Do this except when the selected window's buffer
1024 is being removed from some other window. */
1026 /* last_window_start records the start position that this buffer
1027 had in the last window to be disconnected from it.
1028 Now that this statement is unconditional,
1029 it is possible for the buffer to be displayed in the
1030 selected window, while last_window_start reflects another
1031 window which was recently showing the same buffer.
1032 Some people might say that might be a good thing. Let's see. */
1033 b
->last_window_start
= marker_position (w
->start
);
1035 /* Point in the selected window's buffer
1036 is actually stored in that buffer, and the window's pointm isn't used.
1037 So don't clobber point in that buffer. */
1038 if (! EQ (buf
, XWINDOW (selected_window
)->buffer
)
1039 /* This line helps to fix Horsley's testbug.el bug. */
1040 && !(WINDOWP (b
->last_selected_window
)
1041 && w
!= XWINDOW (b
->last_selected_window
)
1042 && EQ (buf
, XWINDOW (b
->last_selected_window
)->buffer
)))
1043 temp_set_point_both (b
,
1044 clip_to_bounds (BUF_BEGV (b
),
1045 XMARKER (w
->pointm
)->charpos
,
1047 clip_to_bounds (BUF_BEGV_BYTE (b
),
1048 marker_byte_position (w
->pointm
),
1051 if (WINDOWP (b
->last_selected_window
)
1052 && w
== XWINDOW (b
->last_selected_window
))
1053 b
->last_selected_window
= Qnil
;
1056 /* Put replacement into the window structure in place of old. */
1058 replace_window (old
, replacement
)
1059 Lisp_Object old
, replacement
;
1061 register Lisp_Object tem
;
1062 register struct window
*o
= XWINDOW (old
), *p
= XWINDOW (replacement
);
1064 /* If OLD is its frame's root_window, then replacement is the new
1065 root_window for that frame. */
1067 if (EQ (old
, FRAME_ROOT_WINDOW (XFRAME (o
->frame
))))
1068 FRAME_ROOT_WINDOW (XFRAME (o
->frame
)) = replacement
;
1072 p
->width
= o
->width
;
1073 p
->height
= o
->height
;
1074 p
->desired_matrix
= p
->current_matrix
= 0;
1076 bzero (&p
->cursor
, sizeof (p
->cursor
));
1077 bzero (&p
->last_cursor
, sizeof (p
->last_cursor
));
1078 bzero (&p
->phys_cursor
, sizeof (p
->phys_cursor
));
1079 p
->phys_cursor_type
= -1;
1080 p
->must_be_updated_p
= 0;
1081 p
->pseudo_window_p
= 0;
1082 XSETFASTINT (p
->window_end_vpos
, 0);
1083 XSETFASTINT (p
->window_end_pos
, 0);
1084 p
->window_end_valid
= Qnil
;
1085 p
->frozen_window_start_p
= 0;
1086 p
->orig_top
= p
->orig_height
= Qnil
;
1088 p
->next
= tem
= o
->next
;
1090 XWINDOW (tem
)->prev
= replacement
;
1092 p
->prev
= tem
= o
->prev
;
1094 XWINDOW (tem
)->next
= replacement
;
1096 p
->parent
= tem
= o
->parent
;
1099 if (EQ (XWINDOW (tem
)->vchild
, old
))
1100 XWINDOW (tem
)->vchild
= replacement
;
1101 if (EQ (XWINDOW (tem
)->hchild
, old
))
1102 XWINDOW (tem
)->hchild
= replacement
;
1105 /*** Here, if replacement is a vertical combination
1106 and so is its new parent, we should make replacement's
1107 children be children of that parent instead. ***/
1110 DEFUN ("delete-window", Fdelete_window
, Sdelete_window
, 0, 1, "",
1111 "Remove WINDOW from the display. Default is selected window.")
1113 register Lisp_Object window
;
1115 delete_window (window
);
1117 if (! NILP (Vwindow_configuration_change_hook
)
1118 && ! NILP (Vrun_hooks
))
1119 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
1125 delete_window (window
)
1126 register Lisp_Object window
;
1128 register Lisp_Object tem
, parent
, sib
;
1129 register struct window
*p
;
1130 register struct window
*par
;
1133 /* Because this function is called by other C code on non-leaf
1134 windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
1135 so we can't decode_window here. */
1137 window
= selected_window
;
1139 CHECK_WINDOW (window
, 0);
1140 p
= XWINDOW (window
);
1142 /* It's okay to delete an already-deleted window. */
1143 if (NILP (p
->buffer
)
1145 && NILP (p
->vchild
))
1150 error ("Attempt to delete minibuffer or sole ordinary window");
1151 par
= XWINDOW (parent
);
1153 windows_or_buffers_changed
++;
1154 Vwindow_list
= Qnil
;
1155 frame
= XFRAME (WINDOW_FRAME (p
));
1156 FRAME_WINDOW_SIZES_CHANGED (frame
) = 1;
1158 /* Are we trying to delete any frame's selected window? */
1160 Lisp_Object frame
, pwindow
;
1162 /* See if the frame's selected window is either WINDOW
1163 or any subwindow of it, by finding all that window's parents
1164 and comparing each one with WINDOW. */
1165 frame
= WINDOW_FRAME (XWINDOW (window
));
1166 pwindow
= FRAME_SELECTED_WINDOW (XFRAME (frame
));
1168 while (!NILP (pwindow
))
1170 if (EQ (window
, pwindow
))
1172 pwindow
= XWINDOW (pwindow
)->parent
;
1175 if (EQ (window
, pwindow
))
1177 Lisp_Object alternative
;
1178 alternative
= Fnext_window (window
, Qlambda
, Qnil
);
1180 /* If we're about to delete the selected window on the
1181 selected frame, then we should use Fselect_window to select
1182 the new window. On the other hand, if we're about to
1183 delete the selected window on any other frame, we shouldn't do
1184 anything but set the frame's selected_window slot. */
1185 if (EQ (window
, selected_window
))
1186 Fselect_window (alternative
);
1188 FRAME_SELECTED_WINDOW (XFRAME (frame
)) = alternative
;
1193 /* tem is null for dummy parent windows
1194 (which have inferiors but not any contents themselves) */
1198 unchain_marker (p
->pointm
);
1199 unchain_marker (p
->start
);
1202 /* Free window glyph matrices. It is sure that they are allocated
1203 again when ADJUST_GLYPHS is called. Block input so that expose
1204 events and other events that access glyph matrices are not
1205 processed while we are changing them. */
1207 free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (frame
)));
1211 XWINDOW (tem
)->prev
= p
->prev
;
1215 XWINDOW (tem
)->next
= p
->next
;
1217 if (EQ (window
, par
->hchild
))
1218 par
->hchild
= p
->next
;
1219 if (EQ (window
, par
->vchild
))
1220 par
->vchild
= p
->next
;
1222 /* Find one of our siblings to give our space to. */
1226 /* If p gives its space to its next sibling, that sibling needs
1227 to have its top/left side pulled back to where p's is.
1228 set_window_{height,width} will re-position the sibling's
1231 XWINDOW (sib
)->top
= p
->top
;
1232 XWINDOW (sib
)->left
= p
->left
;
1235 /* Stretch that sibling. */
1236 if (!NILP (par
->vchild
))
1237 set_window_height (sib
,
1238 XFASTINT (XWINDOW (sib
)->height
) + XFASTINT (p
->height
),
1240 if (!NILP (par
->hchild
))
1241 set_window_width (sib
,
1242 XFASTINT (XWINDOW (sib
)->width
) + XFASTINT (p
->width
),
1245 /* If parent now has only one child,
1246 put the child into the parent's place. */
1250 if (NILP (XWINDOW (tem
)->next
))
1251 replace_window (parent
, tem
);
1253 /* Since we may be deleting combination windows, we must make sure that
1254 not only p but all its children have been marked as deleted. */
1255 if (! NILP (p
->hchild
))
1256 delete_all_subwindows (XWINDOW (p
->hchild
));
1257 else if (! NILP (p
->vchild
))
1258 delete_all_subwindows (XWINDOW (p
->vchild
));
1260 /* Mark this window as deleted. */
1261 p
->buffer
= p
->hchild
= p
->vchild
= Qnil
;
1263 /* Adjust glyph matrices. */
1264 adjust_glyphs (frame
);
1270 /***********************************************************************
1272 ***********************************************************************/
1274 /* Add window W to *USER_DATA. USER_DATA is actually a Lisp_Object
1275 pointer. This is a callback function for foreach_window, used in
1276 function window_list. */
1279 add_window_to_list (w
, user_data
)
1283 Lisp_Object
*list
= (Lisp_Object
*) user_data
;
1285 XSETWINDOW (window
, w
);
1286 *list
= Fcons (window
, *list
);
1291 /* Return a list of all windows, for use by next_window. If
1292 Vwindow_list is a list, return that list. Otherwise, build a new
1293 list, cache it in Vwindow_list, and return that. */
1298 if (!CONSP (Vwindow_list
))
1302 Vwindow_list
= Qnil
;
1303 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCDR (tail
))
1305 Lisp_Object args
[2];
1307 /* We are visiting windows in canonical order, and add
1308 new windows at the front of args[1], which means we
1309 have to reverse this list at the end. */
1311 foreach_window (XFRAME (XCAR (tail
)), add_window_to_list
, &args
[1]);
1312 args
[0] = Vwindow_list
;
1313 args
[1] = Fnreverse (args
[1]);
1314 Vwindow_list
= Fnconc (2, args
);
1318 return Vwindow_list
;
1322 /* Value is non-zero if WINDOW satisfies the constraints given by
1323 OWINDOW, MINIBUF and ALL_FRAMES.
1325 MINIBUF t means WINDOW may be minibuffer windows.
1326 `lambda' means WINDOW may not be a minibuffer window.
1327 a window means a specific minibuffer window
1329 ALL_FRAMES t means search all frames,
1330 nil means search just current frame,
1331 `visible' means search just visible frames,
1332 0 means search visible and iconified frames,
1333 a window means search the frame that window belongs to,
1334 a frame means consider windows on that frame, only. */
1337 candidate_window_p (window
, owindow
, minibuf
, all_frames
)
1338 Lisp_Object window
, owindow
, minibuf
, all_frames
;
1340 struct window
*w
= XWINDOW (window
);
1341 struct frame
*f
= XFRAME (w
->frame
);
1342 int candidate_p
= 1;
1344 if (!BUFFERP (w
->buffer
))
1346 else if (MINI_WINDOW_P (w
)
1347 && (EQ (minibuf
, Qlambda
)
1348 || (WINDOWP (minibuf
) && !EQ (minibuf
, window
))))
1350 /* If MINIBUF is `lambda' don't consider any mini-windows.
1351 If it is a window, consider only that one. */
1354 else if (EQ (all_frames
, Qt
))
1356 else if (NILP (all_frames
))
1358 xassert (WINDOWP (owindow
));
1359 candidate_p
= EQ (w
->frame
, XWINDOW (owindow
)->frame
);
1361 else if (EQ (all_frames
, Qvisible
))
1363 FRAME_SAMPLE_VISIBILITY (f
);
1364 candidate_p
= FRAME_VISIBLE_P (f
);
1366 else if (INTEGERP (all_frames
) && XINT (all_frames
) == 0)
1368 FRAME_SAMPLE_VISIBILITY (f
);
1369 candidate_p
= FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
);
1371 else if (WINDOWP (all_frames
))
1372 candidate_p
= (EQ (FRAME_MINIBUF_WINDOW (f
), all_frames
)
1373 || EQ (XWINDOW (all_frames
)->frame
, w
->frame
)
1374 || EQ (XWINDOW (all_frames
)->frame
, FRAME_FOCUS_FRAME (f
)));
1375 else if (FRAMEP (all_frames
))
1376 candidate_p
= EQ (all_frames
, w
->frame
);
1382 /* Decode arguments as allowed by Fnext_window, Fprevious_window, and
1383 Fwindow_list. See there for the meaning of WINDOW, MINIBUF, and
1387 decode_next_window_args (window
, minibuf
, all_frames
)
1388 Lisp_Object
*window
, *minibuf
, *all_frames
;
1391 *window
= selected_window
;
1393 CHECK_LIVE_WINDOW (*window
, 0);
1395 /* MINIBUF nil may or may not include minibuffers. Decide if it
1397 if (NILP (*minibuf
))
1398 *minibuf
= minibuf_level
? minibuf_window
: Qlambda
;
1399 else if (!EQ (*minibuf
, Qt
))
1402 /* Now *MINIBUF can be t => count all minibuffer windows, `lambda'
1403 => count none of them, or a specific minibuffer window (the
1404 active one) to count. */
1406 /* ALL_FRAMES nil doesn't specify which frames to include. */
1407 if (NILP (*all_frames
))
1408 *all_frames
= (!EQ (*minibuf
, Qlambda
)
1409 ? FRAME_MINIBUF_WINDOW (XFRAME (XWINDOW (*window
)->frame
))
1411 else if (EQ (*all_frames
, Qvisible
))
1413 else if (XFASTINT (*all_frames
) == 0)
1415 else if (FRAMEP (*all_frames
))
1417 else if (!EQ (*all_frames
, Qt
))
1420 /* Now *ALL_FRAMES is t meaning search all frames, nil meaning
1421 search just current frame, `visible' meaning search just visible
1422 frames, 0 meaning search visible and iconified frames, or a
1423 window, meaning search the frame that window belongs to, or a
1424 frame, meaning consider windows on that frame, only. */
1428 /* Return the next or previous window of WINDOW in canonical ordering
1429 of windows. NEXT_P non-zero means return the next window. See the
1430 documentation string of next-window for the meaning of MINIBUF and
1434 next_window (window
, minibuf
, all_frames
, next_p
)
1435 Lisp_Object window
, minibuf
, all_frames
;
1438 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1440 /* If ALL_FRAMES is a frame, and WINDOW isn't on that frame, just
1441 return the first window on the frame. */
1442 if (FRAMEP (all_frames
)
1443 && !EQ (all_frames
, XWINDOW (window
)->frame
))
1444 return Fframe_first_window (all_frames
);
1450 /* Find WINDOW in the list of all windows. */
1451 list
= Fmemq (window
, window_list ());
1453 /* Scan forward from WINDOW to the end of the window list. */
1455 for (list
= XCDR (list
); CONSP (list
); list
= XCDR (list
))
1456 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1459 /* Scan from the start of the window list up to WINDOW. */
1461 for (list
= Vwindow_list
;
1462 CONSP (list
) && !EQ (XCAR (list
), window
);
1464 if (candidate_window_p (XCAR (list
), window
, minibuf
, all_frames
))
1468 window
= XCAR (list
);
1472 Lisp_Object candidate
, list
;
1474 /* Scan through the list of windows for candidates. If there are
1475 candidate windows in front of WINDOW, the last one of these
1476 is the one we want. If there are candidates following WINDOW
1477 in the list, again the last one of these is the one we want. */
1479 for (list
= window_list (); CONSP (list
); list
= XCDR (list
))
1481 if (EQ (XCAR (list
), window
))
1483 if (WINDOWP (candidate
))
1486 else if (candidate_window_p (XCAR (list
), window
, minibuf
,
1488 candidate
= XCAR (list
);
1491 if (WINDOWP (candidate
))
1499 /* This comment supplies the doc string for `next-window',
1500 for make-docfile to see. We cannot put this in the real DEFUN
1501 due to limits in the Unix cpp.
1503 DEFUN ("next-window", Ffoo, Sfoo, 0, 3, 0,
1504 "Return next window after WINDOW in canonical ordering of windows.\n\
1505 If omitted, WINDOW defaults to the selected window.\n\
1507 Optional second arg MINIBUF t means count the minibuffer window even\n\
1508 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1509 it is active. MINIBUF neither t nor nil means not to count the\n\
1510 minibuffer even if it is active.\n\
1512 Several frames may share a single minibuffer; if the minibuffer\n\
1513 counts, all windows on all frames that share that minibuffer count\n\
1514 too. Therefore, `next-window' can be used to iterate through the\n\
1515 set of windows even when the minibuffer is on another frame. If the\n\
1516 minibuffer does not count, only windows from WINDOW's frame count.\n\
1518 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1519 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1520 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1521 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1522 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1523 Anything else means restrict to WINDOW's frame.\n\
1525 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1526 `next-window' to iterate through the entire cycle of acceptable\n\
1527 windows, eventually ending up back at the window you started with.\n\
1528 `previous-window' traverses the same cycle, in the reverse order.")
1529 (window, minibuf, all_frames) */
1531 DEFUN ("next-window", Fnext_window
, Snext_window
, 0, 3, 0,
1533 (window
, minibuf
, all_frames
)
1534 Lisp_Object window
, minibuf
, all_frames
;
1536 return next_window (window
, minibuf
, all_frames
, 1);
1540 /* This comment supplies the doc string for `previous-window',
1541 for make-docfile to see. We cannot put this in the real DEFUN
1542 due to limits in the Unix cpp.
1544 DEFUN ("previous-window", Ffoo, Sfoo, 0, 3, 0,
1545 "Return the window preceding WINDOW in canonical ordering of windows.\n\
1546 If omitted, WINDOW defaults to the selected window.\n\
1548 Optional second arg MINIBUF t means count the minibuffer window even\n\
1549 if not active. MINIBUF nil or omitted means count the minibuffer iff\n\
1550 it is active. MINIBUF neither t nor nil means not to count the\n\
1551 minibuffer even if it is active.\n\
1553 Several frames may share a single minibuffer; if the minibuffer\n\
1554 counts, all windows on all frames that share that minibuffer count\n\
1555 too. Therefore, `previous-window' can be used to iterate through\n\
1556 the set of windows even when the minibuffer is on another frame. If\n\
1557 the minibuffer does not count, only windows from WINDOW's frame count\n\
1559 Optional third arg ALL-FRAMES t means include windows on all frames.\n\
1560 ALL-FRAMES nil or omitted means cycle within the frames as specified\n\
1561 above. ALL-FRAMES = `visible' means include windows on all visible frames.\n\
1562 ALL-FRAMES = 0 means include windows on all visible and iconified frames.\n\
1563 If ALL-FRAMES is a frame, restrict search to windows on that frame.\n\
1564 Anything else means restrict to WINDOW's frame.\n\
1566 If you use consistent values for MINIBUF and ALL-FRAMES, you can use\n\
1567 `previous-window' to iterate through the entire cycle of acceptable\n\
1568 windows, eventually ending up back at the window you started with.\n\
1569 `next-window' traverses the same cycle, in the reverse order.")
1570 (window, minibuf, all_frames) */
1573 DEFUN ("previous-window", Fprevious_window
, Sprevious_window
, 0, 3, 0,
1575 (window
, minibuf
, all_frames
)
1576 Lisp_Object window
, minibuf
, all_frames
;
1578 return next_window (window
, minibuf
, all_frames
, 0);
1582 DEFUN ("other-window", Fother_window
, Sother_window
, 1, 2, "p",
1583 "Select the ARG'th different window on this frame.\n\
1584 All windows on current frame are arranged in a cyclic order.\n\
1585 This command selects the window ARG steps away in that order.\n\
1586 A negative ARG moves in the opposite order. If the optional second\n\
1587 argument ALL_FRAMES is non-nil, cycle through all frames.")
1589 Lisp_Object arg
, all_frames
;
1594 CHECK_NUMBER (arg
, 0);
1595 window
= selected_window
;
1597 for (i
= XINT (arg
); i
> 0; --i
)
1598 window
= Fnext_window (window
, Qnil
, all_frames
);
1600 window
= Fprevious_window (window
, Qnil
, all_frames
);
1602 Fselect_window (window
);
1607 DEFUN ("window-list", Fwindow_list
, Swindow_list
, 0, 3, 0,
1608 "Return a list of windows on FRAME, starting with WINDOW.\n\
1609 FRAME nil or omitted means use the selected frame.\n\
1610 WINDOW nil or omitted means use the selected window.\n\
1611 MINIBUF t means include the minibuffer window, even if it isn't active.\n\
1612 MINIBUF nil or omitted means include the minibuffer window only\n\
1614 MINIBUF neither nil nor t means never include the minibuffer window.")
1615 (frame
, minibuf
, window
)
1616 Lisp_Object frame
, minibuf
, window
;
1621 window
= selected_window
;
1623 frame
= selected_frame
;
1625 if (!EQ (frame
, XWINDOW (window
)->frame
))
1626 error ("Window is on a different frame");
1628 return window_list_1 (window
, minibuf
, frame
);
1632 /* Return a list of windows in canonical ordering. Arguments are like
1633 for `next-window'. */
1636 window_list_1 (window
, minibuf
, all_frames
)
1637 Lisp_Object window
, minibuf
, all_frames
;
1639 Lisp_Object tail
, list
;
1641 decode_next_window_args (&window
, &minibuf
, &all_frames
);
1644 for (tail
= window_list (); CONSP (tail
); tail
= XCDR (tail
))
1645 if (candidate_window_p (XCAR (tail
), window
, minibuf
, all_frames
))
1646 list
= Fcons (XCAR (tail
), list
);
1648 return Fnreverse (list
);
1653 /* Look at all windows, performing an operation specified by TYPE
1655 If FRAMES is Qt, look at all frames;
1656 Qnil, look at just the selected frame;
1657 Qvisible, look at visible frames;
1658 a frame, just look at windows on that frame.
1659 If MINI is non-zero, perform the operation on minibuffer windows too.
1665 GET_BUFFER_WINDOW
, /* Arg is buffer */
1666 GET_LRU_WINDOW
, /* Arg is t for full-width windows only */
1667 DELETE_OTHER_WINDOWS
, /* Arg is window not to delete */
1668 DELETE_BUFFER_WINDOWS
, /* Arg is buffer */
1670 UNSHOW_BUFFER
, /* Arg is buffer */
1675 window_loop (type
, obj
, mini
, frames
)
1676 enum window_loop type
;
1677 Lisp_Object obj
, frames
;
1680 Lisp_Object window
, windows
, best_window
, frame_arg
;
1682 struct gcpro gcpro1
;
1684 /* If we're only looping through windows on a particular frame,
1685 frame points to that frame. If we're looping through windows
1686 on all frames, frame is 0. */
1687 if (FRAMEP (frames
))
1688 f
= XFRAME (frames
);
1689 else if (NILP (frames
))
1690 f
= SELECTED_FRAME ();
1695 frame_arg
= Qlambda
;
1696 else if (XFASTINT (frames
) == 0)
1698 else if (EQ (frames
, Qvisible
))
1703 /* frame_arg is Qlambda to stick to one frame,
1704 Qvisible to consider all visible frames,
1707 /* Pick a window to start with. */
1711 window
= FRAME_SELECTED_WINDOW (f
);
1713 window
= FRAME_SELECTED_WINDOW (SELECTED_FRAME ());
1715 /* Figure out the last window we're going to mess with. Since
1716 Fnext_window, given the same options, is guaranteed to go in a
1717 ring, we can just use Fprevious_window to find the last one.
1719 We can't just wait until we hit the first window again, because
1720 it might be deleted. */
1722 windows
= window_list_1 (window
, mini
? Qt
: Qnil
, frame_arg
);
1726 for (; CONSP (windows
); windows
= CDR (windows
))
1730 window
= XCAR (windows
);
1731 w
= XWINDOW (window
);
1733 /* Note that we do not pay attention here to whether the frame
1734 is visible, since Fwindow_list skips non-visible frames if
1735 that is desired, under the control of frame_arg. */
1736 if (!MINI_WINDOW_P (w
)
1737 /* For UNSHOW_BUFFER, we must always consider all windows. */
1738 || type
== UNSHOW_BUFFER
1739 || (mini
&& minibuf_level
> 0))
1742 case GET_BUFFER_WINDOW
:
1743 if (EQ (w
->buffer
, obj
)
1744 /* Don't find any minibuffer window
1745 except the one that is currently in use. */
1746 && (MINI_WINDOW_P (w
)
1747 ? EQ (window
, minibuf_window
)
1755 case GET_LRU_WINDOW
:
1756 /* t as arg means consider only full-width windows */
1757 if (!NILP (obj
) && !WINDOW_FULL_WIDTH_P (w
))
1759 /* Ignore dedicated windows and minibuffers. */
1760 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1762 if (NILP (best_window
)
1763 || (XFASTINT (XWINDOW (best_window
)->use_time
)
1764 > XFASTINT (w
->use_time
)))
1765 best_window
= window
;
1768 case DELETE_OTHER_WINDOWS
:
1769 if (!EQ (window
, obj
))
1770 Fdelete_window (window
);
1773 case DELETE_BUFFER_WINDOWS
:
1774 if (EQ (w
->buffer
, obj
))
1776 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
1778 /* If this window is dedicated, and in a frame of its own,
1780 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1781 && !NILP (w
->dedicated
)
1782 && other_visible_frames (f
))
1784 /* Skip the other windows on this frame.
1785 There might be one, the minibuffer! */
1786 while (CONSP (XCDR (windows
))
1787 && EQ (XWINDOW (XCAR (windows
))->frame
,
1788 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1789 windows
= XCDR (windows
);
1791 /* Now we can safely delete the frame. */
1792 Fdelete_frame (w
->frame
, Qnil
);
1794 else if (NILP (w
->parent
))
1796 /* If we're deleting the buffer displayed in the
1797 only window on the frame, find a new buffer to
1800 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1802 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1803 Fset_window_buffer (window
, buffer
);
1804 if (EQ (window
, selected_window
))
1805 Fset_buffer (w
->buffer
);
1808 Fdelete_window (window
);
1812 case GET_LARGEST_WINDOW
:
1814 /* Ignore dedicated windows and minibuffers. */
1815 if (MINI_WINDOW_P (w
) || !NILP (w
->dedicated
))
1818 if (NILP (best_window
))
1819 best_window
= window
;
1822 struct window
*b
= XWINDOW (best_window
);
1823 if (XFASTINT (w
->height
) * XFASTINT (w
->width
)
1824 > XFASTINT (b
->height
) * XFASTINT (b
->width
))
1825 best_window
= window
;
1831 if (EQ (w
->buffer
, obj
))
1834 struct frame
*f
= XFRAME (w
->frame
);
1836 /* Find another buffer to show in this window. */
1837 buffer
= Fother_buffer (obj
, Qnil
, w
->frame
);
1839 buffer
= Fget_buffer_create (build_string ("*scratch*"));
1841 /* If this window is dedicated, and in a frame of its own,
1843 if (EQ (window
, FRAME_ROOT_WINDOW (f
))
1844 && !NILP (w
->dedicated
)
1845 && other_visible_frames (f
))
1847 /* Skip the other windows on this frame.
1848 There might be one, the minibuffer! */
1849 while (CONSP (XCDR (windows
))
1850 && EQ (XWINDOW (XCAR (windows
))->frame
,
1851 XWINDOW (XCAR (XCDR (windows
)))->frame
))
1852 windows
= XCDR (windows
);
1854 /* Now we can safely delete the frame. */
1855 Fdelete_frame (w
->frame
, Qnil
);
1859 /* Otherwise show a different buffer in the window. */
1860 w
->dedicated
= Qnil
;
1861 Fset_window_buffer (window
, buffer
);
1862 if (EQ (window
, selected_window
))
1863 Fset_buffer (w
->buffer
);
1868 /* Check for a window that has a killed buffer. */
1869 case CHECK_ALL_WINDOWS
:
1870 if (! NILP (w
->buffer
)
1871 && NILP (XBUFFER (w
->buffer
)->name
))
1875 case WINDOW_LOOP_UNUSED
:
1884 /* Used for debugging. Abort if any window has a dead buffer. */
1887 check_all_windows ()
1889 window_loop (CHECK_ALL_WINDOWS
, Qnil
, 1, Qt
);
1892 DEFUN ("get-lru-window", Fget_lru_window
, Sget_lru_window
, 0, 1, 0,
1893 "Return the window least recently selected or used for display.\n\
1894 If optional argument FRAME is `visible', search all visible frames.\n\
1895 If FRAME is 0, search all visible and iconified frames.\n\
1896 If FRAME is t, search all frames.\n\
1897 If FRAME is nil, search only the selected frame.\n\
1898 If FRAME is a frame, search only that frame.")
1902 register Lisp_Object w
;
1903 /* First try for a window that is full-width */
1904 w
= window_loop (GET_LRU_WINDOW
, Qt
, 0, frame
);
1905 if (!NILP (w
) && !EQ (w
, selected_window
))
1907 /* If none of them, try the rest */
1908 return window_loop (GET_LRU_WINDOW
, Qnil
, 0, frame
);
1911 DEFUN ("get-largest-window", Fget_largest_window
, Sget_largest_window
, 0, 1, 0,
1912 "Return the largest window in area.\n\
1913 If optional argument FRAME is `visible', search all visible frames.\n\
1914 If FRAME is 0, search all visible and iconified frames.\n\
1915 If FRAME is t, search all frames.\n\
1916 If FRAME is nil, search only the selected frame.\n\
1917 If FRAME is a frame, search only that frame.")
1921 return window_loop (GET_LARGEST_WINDOW
, Qnil
, 0,
1925 DEFUN ("get-buffer-window", Fget_buffer_window
, Sget_buffer_window
, 1, 2, 0,
1926 "Return a window currently displaying BUFFER, or nil if none.\n\
1927 If optional argument FRAME is `visible', search all visible frames.\n\
1928 If optional argument FRAME is 0, search all visible and iconified frames.\n\
1929 If FRAME is t, search all frames.\n\
1930 If FRAME is nil, search only the selected frame.\n\
1931 If FRAME is a frame, search only that frame.")
1933 Lisp_Object buffer
, frame
;
1935 buffer
= Fget_buffer (buffer
);
1936 if (BUFFERP (buffer
))
1937 return window_loop (GET_BUFFER_WINDOW
, buffer
, 1, frame
);
1942 DEFUN ("delete-other-windows", Fdelete_other_windows
, Sdelete_other_windows
,
1944 "Make WINDOW (or the selected window) fill its frame.\n\
1945 Only the frame WINDOW is on is affected.\n\
1946 This function tries to reduce display jumps\n\
1947 by keeping the text previously visible in WINDOW\n\
1948 in the same place on the frame. Doing this depends on\n\
1949 the value of (window-start WINDOW), so if calling this function\n\
1950 in a program gives strange scrolling, make sure the window-start\n\
1951 value is reasonable when this function is called.")
1960 window
= selected_window
;
1962 CHECK_LIVE_WINDOW (window
, 0);
1964 w
= XWINDOW (window
);
1966 startpos
= marker_position (w
->start
);
1967 top
= XFASTINT (w
->top
) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w
)));
1969 if (MINI_WINDOW_P (w
) && top
> 0)
1970 error ("Can't expand minibuffer to full frame");
1972 window_loop (DELETE_OTHER_WINDOWS
, window
, 0, WINDOW_FRAME (w
));
1974 /* Try to minimize scrolling, by setting the window start to the point
1975 will cause the text at the old window start to be at the same place
1976 on the frame. But don't try to do this if the window start is
1977 outside the visible portion (as might happen when the display is
1978 not current, due to typeahead). */
1979 if (startpos
>= BUF_BEGV (XBUFFER (w
->buffer
))
1980 && startpos
<= BUF_ZV (XBUFFER (w
->buffer
)))
1982 struct position pos
;
1983 struct buffer
*obuf
= current_buffer
;
1985 Fset_buffer (w
->buffer
);
1986 /* This computation used to temporarily move point, but that can
1987 have unwanted side effects due to text properties. */
1988 pos
= *vmotion (startpos
, -top
, w
);
1990 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
1991 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
1992 || FETCH_BYTE (pos
.bytepos
- 1) == '\n') ? Qt
1994 /* We need to do this, so that the window-scroll-functions
1996 w
->optional_new_start
= Qt
;
1998 set_buffer_internal (obuf
);
2004 DEFUN ("delete-windows-on", Fdelete_windows_on
, Sdelete_windows_on
,
2005 1, 2, "bDelete windows on (buffer): ",
2006 "Delete all windows showing BUFFER.\n\
2007 Optional second argument FRAME controls which frames are affected.\n\
2008 If optional argument FRAME is `visible', search all visible frames.\n\
2009 If FRAME is 0, search all visible and iconified frames.\n\
2010 If FRAME is nil, search all frames.\n\
2011 If FRAME is t, search only the selected frame.\n\
2012 If FRAME is a frame, search only that frame.")
2014 Lisp_Object buffer
, frame
;
2016 /* FRAME uses t and nil to mean the opposite of what window_loop
2020 else if (EQ (frame
, Qt
))
2025 buffer
= Fget_buffer (buffer
);
2026 CHECK_BUFFER (buffer
, 0);
2027 window_loop (DELETE_BUFFER_WINDOWS
, buffer
, 0, frame
);
2033 DEFUN ("replace-buffer-in-windows", Freplace_buffer_in_windows
,
2034 Sreplace_buffer_in_windows
,
2035 1, 1, "bReplace buffer in windows: ",
2036 "Replace BUFFER with some other buffer in all windows showing it.")
2042 buffer
= Fget_buffer (buffer
);
2043 CHECK_BUFFER (buffer
, 0);
2044 window_loop (UNSHOW_BUFFER
, buffer
, 0, Qt
);
2049 /* Replace BUFFER with some other buffer in all windows
2050 of all frames, even those on other keyboards. */
2053 replace_buffer_in_all_windows (buffer
)
2057 Lisp_Object tail
, frame
;
2059 /* A single call to window_loop won't do the job
2060 because it only considers frames on the current keyboard.
2061 So loop manually over frames, and handle each one. */
2062 FOR_EACH_FRAME (tail
, frame
)
2063 window_loop (UNSHOW_BUFFER
, buffer
, 1, frame
);
2065 window_loop (UNSHOW_BUFFER
, buffer
, 1, Qt
);
2069 /* Set the height of WINDOW and all its inferiors. */
2071 /* The smallest acceptable dimensions for a window. Anything smaller
2072 might crash Emacs. */
2074 #define MIN_SAFE_WINDOW_WIDTH (2)
2075 #define MIN_SAFE_WINDOW_HEIGHT (2)
2077 /* Make sure that window_min_height and window_min_width are
2078 not too small; if they are, set them to safe minima. */
2081 check_min_window_sizes ()
2083 /* Smaller values might permit a crash. */
2084 if (window_min_width
< MIN_SAFE_WINDOW_WIDTH
)
2085 window_min_width
= MIN_SAFE_WINDOW_WIDTH
;
2086 if (window_min_height
< MIN_SAFE_WINDOW_HEIGHT
)
2087 window_min_height
= MIN_SAFE_WINDOW_HEIGHT
;
2090 /* If *ROWS or *COLS are too small a size for FRAME, set them to the
2091 minimum allowable size. */
2094 check_frame_size (frame
, rows
, cols
)
2098 /* For height, we have to see:
2099 whether the frame has a minibuffer,
2100 whether it wants a mode line, and
2101 whether it has a menu bar. */
2103 (FRAME_MINIBUF_ONLY_P (frame
) ? MIN_SAFE_WINDOW_HEIGHT
- 1
2104 : (! FRAME_HAS_MINIBUF_P (frame
)) ? MIN_SAFE_WINDOW_HEIGHT
2105 : 2 * MIN_SAFE_WINDOW_HEIGHT
- 1);
2107 if (FRAME_TOP_MARGIN (frame
) > 0)
2108 min_height
+= FRAME_TOP_MARGIN (frame
);
2110 if (*rows
< min_height
)
2112 if (*cols
< MIN_SAFE_WINDOW_WIDTH
)
2113 *cols
= MIN_SAFE_WINDOW_WIDTH
;
2117 /* Value is non-zero if window W is fixed-size. WIDTH_P non-zero means
2118 check if W's width can be changed, otherwise check W's height.
2119 CHECK_SIBLINGS_P non-zero means check resizablity of WINDOW's
2120 siblings, too. If none of the siblings is resizable, WINDOW isn't
2124 window_fixed_size_p (w
, width_p
, check_siblings_p
)
2126 int width_p
, check_siblings_p
;
2131 if (!NILP (w
->hchild
))
2133 c
= XWINDOW (w
->hchild
);
2137 /* A horiz. combination is fixed-width if all of if its
2139 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2140 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2141 fixed_p
= c
== NULL
;
2145 /* A horiz. combination is fixed-height if one of if its
2147 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2148 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2149 fixed_p
= c
!= NULL
;
2152 else if (!NILP (w
->vchild
))
2154 c
= XWINDOW (w
->vchild
);
2158 /* A vert. combination is fixed-width if one of if its
2160 while (c
&& !window_fixed_size_p (c
, width_p
, 0))
2161 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2162 fixed_p
= c
!= NULL
;
2166 /* A vert. combination is fixed-height if all of if its
2168 while (c
&& window_fixed_size_p (c
, width_p
, 0))
2169 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2170 fixed_p
= c
== NULL
;
2173 else if (BUFFERP (w
->buffer
))
2175 if (w
->height_fixed_p
&& !width_p
)
2179 struct buffer
*old
= current_buffer
;
2182 current_buffer
= XBUFFER (w
->buffer
);
2183 val
= find_symbol_value (Qwindow_size_fixed
);
2184 current_buffer
= old
;
2187 if (!EQ (val
, Qunbound
))
2189 fixed_p
= !NILP (val
);
2192 && ((EQ (val
, Qheight
) && width_p
)
2193 || (EQ (val
, Qwidth
) && !width_p
)))
2198 /* Can't tell if this one is resizable without looking at
2199 siblings. If all siblings are fixed-size this one is too. */
2200 if (!fixed_p
&& check_siblings_p
&& WINDOWP (w
->parent
))
2204 for (child
= w
->prev
; !NILP (child
); child
= XWINDOW (child
)->prev
)
2205 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2209 for (child
= w
->next
; !NILP (child
); child
= XWINDOW (child
)->next
)
2210 if (!window_fixed_size_p (XWINDOW (child
), width_p
, 0))
2224 /* Return the minimum size of window W, not taking fixed-width windows
2225 into account. WIDTH_P non-zero means return the minimum width,
2226 otherwise return the minimum height. If W is a combination window,
2227 compute the minimum size from the minimum sizes of W's children. */
2230 window_min_size_1 (w
, width_p
)
2237 if (!NILP (w
->hchild
))
2239 c
= XWINDOW (w
->hchild
);
2244 /* The min width of a horizontal combination is
2245 the sum of the min widths of its children. */
2248 size
+= window_min_size_1 (c
, width_p
);
2249 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2254 /* The min height a horizontal combination equals
2255 the maximum of all min height of its children. */
2258 int min_size
= window_min_size_1 (c
, width_p
);
2259 size
= max (min_size
, size
);
2260 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2264 else if (!NILP (w
->vchild
))
2266 c
= XWINDOW (w
->vchild
);
2271 /* The min width of a vertical combination is
2272 the maximum of the min widths of its children. */
2275 int min_size
= window_min_size_1 (c
, width_p
);
2276 size
= max (min_size
, size
);
2277 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2282 /* The min height of a vertical combination equals
2283 the sum of the min height of its children. */
2286 size
+= window_min_size_1 (c
, width_p
);
2287 c
= WINDOWP (c
->next
) ? XWINDOW (c
->next
) : NULL
;
2294 size
= window_min_width
;
2297 if (MINI_WINDOW_P (w
)
2298 || (!WINDOW_WANTS_MODELINE_P (w
)
2299 && !WINDOW_WANTS_HEADER_LINE_P (w
)))
2302 size
= window_min_height
;
2310 /* Return the minimum size of window W, taking fixed-size windows into
2311 account. WIDTH_P non-zero means return the minimum width,
2312 otherwise return the minimum height. IGNORE_FIXED_P non-zero means
2313 ignore if W is fixed-size. Set *FIXED to 1 if W is fixed-size
2314 unless FIXED is null. */
2317 window_min_size (w
, width_p
, ignore_fixed_p
, fixed
)
2319 int width_p
, ignore_fixed_p
, *fixed
;
2326 fixed_p
= window_fixed_size_p (w
, width_p
, 1);
2332 size
= width_p
? XFASTINT (w
->width
) : XFASTINT (w
->height
);
2334 size
= window_min_size_1 (w
, width_p
);
2340 /* Set WINDOW's height or width to SIZE. WIDTH_P non-zero means set
2341 WINDOW's width. Resize WINDOW's children, if any, so that they
2342 keep their proportionate size relative to WINDOW. Propagate
2343 WINDOW's top or left edge position to children. Delete windows
2344 that become too small unless NODELETE_P is non-zero. */
2347 size_window (window
, size
, width_p
, nodelete_p
)
2349 int size
, width_p
, nodelete_p
;
2351 struct window
*w
= XWINDOW (window
);
2353 Lisp_Object child
, *forward
, *sideward
;
2354 int old_size
, min_size
;
2356 check_min_window_sizes ();
2357 size
= max (0, size
);
2359 /* If the window has been "too small" at one point,
2360 don't delete it for being "too small" in the future.
2361 Preserve it as long as that is at all possible. */
2364 old_size
= XINT (w
->width
);
2365 min_size
= window_min_width
;
2369 old_size
= XINT (w
->height
);
2370 min_size
= window_min_height
;
2373 if (old_size
< window_min_width
)
2374 w
->too_small_ok
= Qt
;
2376 /* Maybe delete WINDOW if it's too small. */
2377 if (!nodelete_p
&& !NILP (w
->parent
))
2381 if (!MINI_WINDOW_P (w
) && !NILP (w
->too_small_ok
))
2382 min_size
= width_p
? MIN_SAFE_WINDOW_WIDTH
: MIN_SAFE_WINDOW_HEIGHT
;
2384 min_size
= width_p
? window_min_width
: window_min_height
;
2386 if (size
< min_size
)
2388 delete_window (window
);
2393 /* Set redisplay hints. */
2394 w
->last_modified
= make_number (0);
2395 w
->last_overlay_modified
= make_number (0);
2396 windows_or_buffers_changed
++;
2397 FRAME_WINDOW_SIZES_CHANGED (XFRAME (w
->frame
)) = 1;
2401 sideward
= &w
->vchild
;
2402 forward
= &w
->hchild
;
2403 w
->width
= make_number (size
);
2407 sideward
= &w
->hchild
;
2408 forward
= &w
->vchild
;
2409 w
->height
= make_number (size
);
2412 if (!NILP (*sideward
))
2414 for (child
= *sideward
; !NILP (child
); child
= c
->next
)
2416 c
= XWINDOW (child
);
2421 size_window (child
, size
, width_p
, nodelete_p
);
2424 else if (!NILP (*forward
))
2426 int fixed_size
, each
, extra
, n
;
2427 int resize_fixed_p
, nfixed
;
2428 int last_pos
, first_pos
, nchildren
, total
;
2430 /* Determine the fixed-size portion of the this window, and the
2431 number of child windows. */
2432 fixed_size
= nchildren
= nfixed
= total
= 0;
2433 for (child
= *forward
; !NILP (child
); child
= c
->next
, ++nchildren
)
2437 c
= XWINDOW (child
);
2438 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2439 total
+= child_size
;
2441 if (window_fixed_size_p (c
, width_p
, 0))
2443 fixed_size
+= child_size
;
2448 /* If the new size is smaller than fixed_size, or if there
2449 aren't any resizable windows, allow resizing fixed-size
2451 resize_fixed_p
= nfixed
== nchildren
|| size
< fixed_size
;
2453 /* Compute how many lines/columns to add to each child. The
2454 value of extra takes care of rounding errors. */
2455 n
= resize_fixed_p
? nchildren
: nchildren
- nfixed
;
2456 each
= (size
- total
) / n
;
2457 extra
= (size
- total
) - n
* each
;
2459 /* Compute new children heights and edge positions. */
2460 first_pos
= width_p
? XINT (w
->left
) : XINT (w
->top
);
2461 last_pos
= first_pos
;
2462 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2464 int new_size
, old_size
;
2466 c
= XWINDOW (child
);
2467 old_size
= width_p
? XFASTINT (c
->width
) : XFASTINT (c
->height
);
2468 new_size
= old_size
;
2470 /* The top or left edge position of this child equals the
2471 bottom or right edge of its predecessor. */
2473 c
->left
= make_number (last_pos
);
2475 c
->top
= make_number (last_pos
);
2477 /* If this child can be resized, do it. */
2478 if (resize_fixed_p
|| !window_fixed_size_p (c
, width_p
, 0))
2480 new_size
= old_size
+ each
+ extra
;
2484 /* Set new height. Note that size_window also propagates
2485 edge positions to children, so it's not a no-op if we
2486 didn't change the child's size. */
2487 size_window (child
, new_size
, width_p
, 1);
2489 /* Remember the bottom/right edge position of this child; it
2490 will be used to set the top/left edge of the next child. */
2491 last_pos
+= new_size
;
2494 /* We should have covered the parent exactly with child windows. */
2495 xassert (size
== last_pos
- first_pos
);
2497 /* Now delete any children that became too small. */
2499 for (child
= *forward
; !NILP (child
); child
= c
->next
)
2502 c
= XWINDOW (child
);
2503 child_size
= width_p
? XINT (c
->width
) : XINT (c
->height
);
2504 size_window (child
, child_size
, width_p
, 0);
2509 /* Set WINDOW's height to HEIGHT, and recursively change the height of
2510 WINDOW's children. NODELETE non-zero means don't delete windows
2511 that become too small in the process. (The caller should check
2512 later and do so if appropriate.) */
2515 set_window_height (window
, height
, nodelete
)
2520 size_window (window
, height
, 0, nodelete
);
2524 /* Set WINDOW's width to WIDTH, and recursively change the width of
2525 WINDOW's children. NODELETE non-zero means don't delete windows
2526 that become too small in the process. (The caller should check
2527 later and do so if appropriate.) */
2530 set_window_width (window
, width
, nodelete
)
2535 size_window (window
, width
, 1, nodelete
);
2539 int window_select_count
;
2542 Fset_window_buffer_unwind (obuf
)
2550 /* Make WINDOW display BUFFER as its contents. RUN_HOOKS_P non-zero
2551 means it's allowed to run hooks. See make_frame for a case where
2552 it's not allowed. */
2555 set_window_buffer (window
, buffer
, run_hooks_p
)
2556 Lisp_Object window
, buffer
;
2559 struct window
*w
= XWINDOW (window
);
2560 struct buffer
*b
= XBUFFER (buffer
);
2561 int count
= specpdl_ptr
- specpdl
;
2565 if (EQ (window
, selected_window
))
2566 b
->last_selected_window
= window
;
2568 /* Update time stamps of buffer display. */
2569 if (INTEGERP (b
->display_count
))
2570 XSETINT (b
->display_count
, XINT (b
->display_count
) + 1);
2571 b
->display_time
= Fcurrent_time ();
2573 XSETFASTINT (w
->window_end_pos
, 0);
2574 XSETFASTINT (w
->window_end_vpos
, 0);
2575 bzero (&w
->last_cursor
, sizeof w
->last_cursor
);
2576 w
->window_end_valid
= Qnil
;
2577 XSETFASTINT (w
->hscroll
, 0);
2578 set_marker_both (w
->pointm
, buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
2579 set_marker_restricted (w
->start
,
2580 make_number (b
->last_window_start
),
2582 w
->start_at_line_beg
= Qnil
;
2583 w
->force_start
= Qnil
;
2584 XSETFASTINT (w
->last_modified
, 0);
2585 XSETFASTINT (w
->last_overlay_modified
, 0);
2586 windows_or_buffers_changed
++;
2588 /* We must select BUFFER for running the window-scroll-functions.
2589 If WINDOW is selected, switch permanently.
2590 Otherwise, switch but go back to the ambient buffer afterward. */
2591 if (EQ (window
, selected_window
))
2592 Fset_buffer (buffer
);
2593 /* We can't check ! NILP (Vwindow_scroll_functions) here
2594 because that might itself be a local variable. */
2595 else if (window_initialized
)
2597 record_unwind_protect (Fset_window_buffer_unwind
, Fcurrent_buffer ());
2598 Fset_buffer (buffer
);
2601 /* Set left and right marginal area width from buffer. */
2602 Fset_window_margins (window
, b
->left_margin_width
, b
->right_margin_width
);
2606 if (! NILP (Vwindow_scroll_functions
))
2607 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2608 Fmarker_position (w
->start
));
2610 if (! NILP (Vwindow_configuration_change_hook
)
2611 && ! NILP (Vrun_hooks
))
2612 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
2615 unbind_to (count
, Qnil
);
2619 DEFUN ("set-window-buffer", Fset_window_buffer
, Sset_window_buffer
, 2, 2, 0,
2620 "Make WINDOW display BUFFER as its contents.\n\
2621 BUFFER can be a buffer or buffer name.")
2623 register Lisp_Object window
, buffer
;
2625 register Lisp_Object tem
;
2626 register struct window
*w
= decode_window (window
);
2628 XSETWINDOW (window
, w
);
2629 buffer
= Fget_buffer (buffer
);
2630 CHECK_BUFFER (buffer
, 1);
2632 if (NILP (XBUFFER (buffer
)->name
))
2633 error ("Attempt to display deleted buffer");
2637 error ("Window is deleted");
2638 else if (! EQ (tem
, Qt
)) /* w->buffer is t when the window
2639 is first being set up. */
2641 if (!NILP (w
->dedicated
) && !EQ (tem
, buffer
))
2642 error ("Window is dedicated to `%s'",
2643 XSTRING (XBUFFER (tem
)->name
)->data
);
2648 set_window_buffer (window
, buffer
, 1);
2652 DEFUN ("select-window", Fselect_window
, Sselect_window
, 1, 1, 0,
2653 "Select WINDOW. Most editing will apply to WINDOW's buffer.\n\
2654 If WINDOW is not already selected, also make WINDOW's buffer current.\n\
2655 Note that the main editor command loop\n\
2656 selects the buffer of the selected window before each command.")
2658 register Lisp_Object window
;
2660 return select_window_1 (window
, 1);
2663 /* Note that selected_window can be nil
2664 when this is called from Fset_window_configuration. */
2667 select_window_1 (window
, recordflag
)
2668 register Lisp_Object window
;
2671 register struct window
*w
;
2672 register struct window
*ow
;
2675 CHECK_LIVE_WINDOW (window
, 0);
2677 w
= XWINDOW (window
);
2679 if (NILP (w
->buffer
))
2680 error ("Trying to select deleted window or non-leaf window");
2682 XSETFASTINT (w
->use_time
, ++window_select_count
);
2683 if (EQ (window
, selected_window
))
2686 if (!NILP (selected_window
))
2688 ow
= XWINDOW (selected_window
);
2689 if (! NILP (ow
->buffer
))
2690 set_marker_both (ow
->pointm
, ow
->buffer
,
2691 BUF_PT (XBUFFER (ow
->buffer
)),
2692 BUF_PT_BYTE (XBUFFER (ow
->buffer
)));
2695 selected_window
= window
;
2696 sf
= SELECTED_FRAME ();
2697 if (XFRAME (WINDOW_FRAME (w
)) != sf
)
2699 XFRAME (WINDOW_FRAME (w
))->selected_window
= window
;
2700 /* Use this rather than Fhandle_switch_frame
2701 so that FRAME_FOCUS_FRAME is moved appropriately as we
2702 move around in the state where a minibuffer in a separate
2704 Fselect_frame (WINDOW_FRAME (w
), Qnil
);
2707 sf
->selected_window
= window
;
2710 record_buffer (w
->buffer
);
2711 Fset_buffer (w
->buffer
);
2713 XBUFFER (w
->buffer
)->last_selected_window
= window
;
2715 /* Go to the point recorded in the window.
2716 This is important when the buffer is in more
2717 than one window. It also matters when
2718 redisplay_window has altered point after scrolling,
2719 because it makes the change only in the window. */
2721 register int new_point
= marker_position (w
->pointm
);
2722 if (new_point
< BEGV
)
2724 else if (new_point
> ZV
)
2730 windows_or_buffers_changed
++;
2734 /* Deiconify the frame containing the window WINDOW,
2735 unless it is the selected frame;
2738 The reason for the exception for the selected frame
2739 is that it seems better not to change the selected frames visibility
2740 merely because of displaying a different buffer in it.
2741 The deiconification is useful when a buffer gets shown in
2742 another frame that you were not using lately. */
2745 display_buffer_1 (window
)
2748 Lisp_Object frame
= XWINDOW (window
)->frame
;
2749 FRAME_PTR f
= XFRAME (frame
);
2751 FRAME_SAMPLE_VISIBILITY (f
);
2753 if (!EQ (frame
, selected_frame
))
2755 if (FRAME_ICONIFIED_P (f
))
2756 Fmake_frame_visible (frame
);
2757 else if (FRAME_VISIBLE_P (f
))
2758 Fraise_frame (frame
);
2764 DEFUN ("special-display-p", Fspecial_display_p
, Sspecial_display_p
, 1, 1, 0,
2765 "Returns non-nil if a buffer named BUFFER-NAME would be created specially.\n\
2766 The value is actually t if the frame should be called with default frame\n\
2767 parameters, and a list of frame parameters if they were specified.\n\
2768 See `special-display-buffer-names', and `special-display-regexps'.")
2770 Lisp_Object buffer_name
;
2774 CHECK_STRING (buffer_name
, 1);
2776 tem
= Fmember (buffer_name
, Vspecial_display_buffer_names
);
2780 tem
= Fassoc (buffer_name
, Vspecial_display_buffer_names
);
2784 for (tem
= Vspecial_display_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2786 Lisp_Object car
= XCAR (tem
);
2788 && fast_string_match (car
, buffer_name
) >= 0)
2790 else if (CONSP (car
)
2791 && STRINGP (XCAR (car
))
2792 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2798 DEFUN ("same-window-p", Fsame_window_p
, Ssame_window_p
, 1, 1, 0,
2799 "Returns non-nil if a new buffer named BUFFER-NAME would use the same window.\n\
2800 See `same-window-buffer-names' and `same-window-regexps'.")
2802 Lisp_Object buffer_name
;
2806 CHECK_STRING (buffer_name
, 1);
2808 tem
= Fmember (buffer_name
, Vsame_window_buffer_names
);
2812 tem
= Fassoc (buffer_name
, Vsame_window_buffer_names
);
2816 for (tem
= Vsame_window_regexps
; CONSP (tem
); tem
= XCDR (tem
))
2818 Lisp_Object car
= XCAR (tem
);
2820 && fast_string_match (car
, buffer_name
) >= 0)
2822 else if (CONSP (car
)
2823 && STRINGP (XCAR (car
))
2824 && fast_string_match (XCAR (car
), buffer_name
) >= 0)
2830 /* Use B so the default is (other-buffer). */
2831 DEFUN ("display-buffer", Fdisplay_buffer
, Sdisplay_buffer
, 1, 3,
2832 "BDisplay buffer: \nP",
2833 "Make BUFFER appear in some window but don't select it.\n\
2834 BUFFER can be a buffer or a buffer name.\n\
2835 If BUFFER is shown already in some window, just use that one,\n\
2836 unless the window is the selected window and the optional second\n\
2837 argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
2838 If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
2839 Returns the window displaying BUFFER.\n\
2840 If `display-reuse-frames' is non-nil, and another frame is currently\n\
2841 displaying BUFFER, then simply raise that frame.\n\
2843 The variables `special-display-buffer-names', `special-display-regexps',\n\
2844 `same-window-buffer-names', and `same-window-regexps' customize how certain\n\
2845 buffer names are handled.\n\
2847 If optional argument FRAME is `visible', search all visible frames.\n\
2848 If FRAME is 0, search all visible and iconified frames.\n\
2849 If FRAME is t, search all frames.\n\
2850 If FRAME is a frame, search only that frame.\n\
2851 If FRAME is nil, search only the selected frame\n\
2852 (actually the last nonminibuffer frame),\n\
2853 unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,\n\
2854 which means search visible and iconified frames.\n\
2856 If `even-window-heights' is non-nil, window heights will be evened out\n\
2857 if displaying the buffer causes two vertically\ adjacent windows to be\n\
2859 (buffer
, not_this_window
, frame
)
2860 register Lisp_Object buffer
, not_this_window
, frame
;
2862 register Lisp_Object window
, tem
, swp
;
2866 buffer
= Fget_buffer (buffer
);
2867 CHECK_BUFFER (buffer
, 0);
2869 if (!NILP (Vdisplay_buffer_function
))
2870 return call2 (Vdisplay_buffer_function
, buffer
, not_this_window
);
2872 if (NILP (not_this_window
)
2873 && XBUFFER (XWINDOW (selected_window
)->buffer
) == XBUFFER (buffer
))
2874 return display_buffer_1 (selected_window
);
2876 /* See if the user has specified this buffer should appear
2877 in the selected window. */
2878 if (NILP (not_this_window
))
2880 swp
= Fsame_window_p (XBUFFER (buffer
)->name
);
2881 if (!NILP (swp
) && !no_switch_window (selected_window
))
2883 Fswitch_to_buffer (buffer
, Qnil
);
2884 return display_buffer_1 (selected_window
);
2888 /* If the user wants pop-up-frames or display-reuse-frames, then
2889 look for a window showing BUFFER on any visible or iconified frame.
2890 Otherwise search only the current frame. */
2893 else if (pop_up_frames
2894 || display_buffer_reuse_frames
2895 || last_nonminibuf_frame
== 0)
2896 XSETFASTINT (tem
, 0);
2898 XSETFRAME (tem
, last_nonminibuf_frame
);
2900 window
= Fget_buffer_window (buffer
, tem
);
2902 && (NILP (not_this_window
) || !EQ (window
, selected_window
)))
2903 return display_buffer_1 (window
);
2905 /* Certain buffer names get special handling. */
2906 if (!NILP (Vspecial_display_function
) && NILP (swp
))
2908 tem
= Fspecial_display_p (XBUFFER (buffer
)->name
);
2910 return call1 (Vspecial_display_function
, buffer
);
2912 return call2 (Vspecial_display_function
, buffer
, tem
);
2915 /* If there are no frames open that have more than a minibuffer,
2916 we need to create a new frame. */
2917 if (pop_up_frames
|| last_nonminibuf_frame
== 0)
2919 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2920 Fset_window_buffer (window
, buffer
);
2921 return display_buffer_1 (window
);
2924 f
= SELECTED_FRAME ();
2926 || FRAME_MINIBUF_ONLY_P (f
)
2927 /* If the current frame is a special display frame,
2928 don't try to reuse its windows. */
2929 || !NILP (XWINDOW (FRAME_ROOT_WINDOW (f
))->dedicated
))
2934 if (FRAME_MINIBUF_ONLY_P (f
))
2935 XSETFRAME (frames
, last_nonminibuf_frame
);
2936 /* Don't try to create a window if would get an error */
2937 if (split_height_threshold
< window_min_height
<< 1)
2938 split_height_threshold
= window_min_height
<< 1;
2940 /* Note that both Fget_largest_window and Fget_lru_window
2941 ignore minibuffers and dedicated windows.
2942 This means they can return nil. */
2944 /* If the frame we would try to split cannot be split,
2945 try other frames. */
2946 if (FRAME_NO_SPLIT_P (NILP (frames
) ? f
: last_nonminibuf_frame
))
2948 /* Try visible frames first. */
2949 window
= Fget_largest_window (Qvisible
);
2950 /* If that didn't work, try iconified frames. */
2952 window
= Fget_largest_window (make_number (0));
2954 window
= Fget_largest_window (Qt
);
2957 window
= Fget_largest_window (frames
);
2959 /* If we got a tall enough full-width window that can be split,
2962 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2963 && window_height (window
) >= split_height_threshold
2964 && WINDOW_FULL_WIDTH_P (XWINDOW (window
)))
2965 window
= Fsplit_window (window
, Qnil
, Qnil
);
2968 Lisp_Object upper
, lower
, other
;
2970 window
= Fget_lru_window (frames
);
2971 /* If the LRU window is selected, and big enough,
2972 and can be split, split it. */
2974 && ! FRAME_NO_SPLIT_P (XFRAME (XWINDOW (window
)->frame
))
2975 && (EQ (window
, selected_window
)
2976 || EQ (XWINDOW (window
)->parent
, Qnil
))
2977 && window_height (window
) >= window_min_height
<< 1)
2978 window
= Fsplit_window (window
, Qnil
, Qnil
);
2979 /* If Fget_lru_window returned nil, try other approaches. */
2981 /* Try visible frames first. */
2983 window
= Fget_buffer_window (buffer
, Qvisible
);
2985 window
= Fget_largest_window (Qvisible
);
2986 /* If that didn't work, try iconified frames. */
2988 window
= Fget_buffer_window (buffer
, make_number (0));
2990 window
= Fget_largest_window (make_number (0));
2991 /* Try invisible frames. */
2993 window
= Fget_buffer_window (buffer
, Qt
);
2995 window
= Fget_largest_window (Qt
);
2996 /* As a last resort, make a new frame. */
2998 window
= Fframe_selected_window (call0 (Vpop_up_frame_function
));
2999 /* If window appears above or below another,
3000 even out their heights. */
3001 other
= upper
= lower
= Qnil
;
3002 if (!NILP (XWINDOW (window
)->prev
))
3003 other
= upper
= XWINDOW (window
)->prev
, lower
= window
;
3004 if (!NILP (XWINDOW (window
)->next
))
3005 other
= lower
= XWINDOW (window
)->next
, upper
= window
;
3007 && !NILP (Veven_window_heights
)
3008 /* Check that OTHER and WINDOW are vertically arrayed. */
3009 && !EQ (XWINDOW (other
)->top
, XWINDOW (window
)->top
)
3010 && (XFASTINT (XWINDOW (other
)->height
)
3011 > XFASTINT (XWINDOW (window
)->height
)))
3013 int total
= (XFASTINT (XWINDOW (other
)->height
)
3014 + XFASTINT (XWINDOW (window
)->height
));
3015 enlarge_window (upper
,
3016 total
/ 2 - XFASTINT (XWINDOW (upper
)->height
),
3022 window
= Fget_lru_window (Qnil
);
3024 Fset_window_buffer (window
, buffer
);
3025 return display_buffer_1 (window
);
3029 temp_output_buffer_show (buf
)
3030 register Lisp_Object buf
;
3032 register struct buffer
*old
= current_buffer
;
3033 register Lisp_Object window
;
3034 register struct window
*w
;
3036 XBUFFER (buf
)->directory
= current_buffer
->directory
;
3039 BUF_SAVE_MODIFF (XBUFFER (buf
)) = MODIFF
;
3043 XBUFFER (buf
)->prevent_redisplay_optimizations_p
= 1;
3044 set_buffer_internal (old
);
3046 if (!EQ (Vtemp_buffer_show_function
, Qnil
))
3047 call1 (Vtemp_buffer_show_function
, buf
);
3050 window
= Fdisplay_buffer (buf
, Qnil
, Qnil
);
3052 if (!EQ (XWINDOW (window
)->frame
, selected_frame
))
3053 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (window
)));
3054 Vminibuf_scroll_window
= window
;
3055 w
= XWINDOW (window
);
3056 XSETFASTINT (w
->hscroll
, 0);
3057 set_marker_restricted_both (w
->start
, buf
, 1, 1);
3058 set_marker_restricted_both (w
->pointm
, buf
, 1, 1);
3060 /* Run temp-buffer-show-hook, with the chosen window selected
3061 and it sbuffer current. */
3062 if (!NILP (Vrun_hooks
))
3065 tem
= Fboundp (Qtemp_buffer_show_hook
);
3068 tem
= Fsymbol_value (Qtemp_buffer_show_hook
);
3071 int count
= specpdl_ptr
- specpdl
;
3072 Lisp_Object prev_window
;
3073 prev_window
= selected_window
;
3075 /* Select the window that was chosen, for running the hook. */
3076 record_unwind_protect (Fselect_window
, prev_window
);
3077 select_window_1 (window
, 0);
3078 Fset_buffer (w
->buffer
);
3079 call1 (Vrun_hooks
, Qtemp_buffer_show_hook
);
3080 select_window_1 (prev_window
, 0);
3081 unbind_to (count
, Qnil
);
3089 make_dummy_parent (window
)
3093 register struct window
*o
, *p
;
3094 register struct Lisp_Vector
*vec
;
3097 o
= XWINDOW (window
);
3098 vec
= allocate_vectorlike ((EMACS_INT
)VECSIZE (struct window
));
3099 for (i
= 0; i
< VECSIZE (struct window
); ++i
)
3100 vec
->contents
[i
] = ((struct Lisp_Vector
*)o
)->contents
[i
];
3101 vec
->size
= VECSIZE (struct window
);
3102 p
= (struct window
*)vec
;
3103 XSETWINDOW (new, p
);
3105 XSETFASTINT (p
->sequence_number
, ++sequence_number
);
3107 /* Put new into window structure in place of window */
3108 replace_window (window
, new);
3121 DEFUN ("split-window", Fsplit_window
, Ssplit_window
, 0, 3, "",
3122 "Split WINDOW, putting SIZE lines in the first of the pair.\n\
3123 WINDOW defaults to selected one and SIZE to half its size.\n\
3124 If optional third arg HORFLAG is non-nil, split side by side\n\
3125 and put SIZE columns in the first of the pair. In that case,\n\
3126 SIZE includes that window's scroll bar, or the divider column to its right.")
3127 (window
, size
, horflag
)
3128 Lisp_Object window
, size
, horflag
;
3130 register Lisp_Object
new;
3131 register struct window
*o
, *p
;
3133 register int size_int
;
3136 window
= selected_window
;
3138 CHECK_LIVE_WINDOW (window
, 0);
3140 o
= XWINDOW (window
);
3141 fo
= XFRAME (WINDOW_FRAME (o
));
3145 if (!NILP (horflag
))
3146 /* Calculate the size of the left-hand window, by dividing
3147 the usable space in columns by two.
3148 We round up, since the left-hand window may include
3149 a dividing line, while the right-hand may not. */
3150 size_int
= (XFASTINT (o
->width
) + 1) >> 1;
3152 size_int
= XFASTINT (o
->height
) >> 1;
3156 CHECK_NUMBER (size
, 1);
3157 size_int
= XINT (size
);
3160 if (MINI_WINDOW_P (o
))
3161 error ("Attempt to split minibuffer window");
3162 else if (window_fixed_size_p (o
, !NILP (horflag
), 0))
3163 error ("Attempt to split fixed-size window");
3165 check_min_window_sizes ();
3169 if (size_int
< window_min_height
)
3170 error ("Window height %d too small (after splitting)", size_int
);
3171 if (size_int
+ window_min_height
> XFASTINT (o
->height
))
3172 error ("Window height %d too small (after splitting)",
3173 XFASTINT (o
->height
) - size_int
);
3174 if (NILP (o
->parent
)
3175 || NILP (XWINDOW (o
->parent
)->vchild
))
3177 make_dummy_parent (window
);
3179 XWINDOW (new)->vchild
= window
;
3184 if (size_int
< window_min_width
)
3185 error ("Window width %d too small (after splitting)", size_int
);
3187 if (size_int
+ window_min_width
> XFASTINT (o
->width
))
3188 error ("Window width %d too small (after splitting)",
3189 XFASTINT (o
->width
) - size_int
);
3190 if (NILP (o
->parent
)
3191 || NILP (XWINDOW (o
->parent
)->hchild
))
3193 make_dummy_parent (window
);
3195 XWINDOW (new)->hchild
= window
;
3199 /* Now we know that window's parent is a vertical combination
3200 if we are dividing vertically, or a horizontal combination
3201 if we are making side-by-side windows */
3203 windows_or_buffers_changed
++;
3204 FRAME_WINDOW_SIZES_CHANGED (fo
) = 1;
3205 new = make_window ();
3208 p
->frame
= o
->frame
;
3210 if (!NILP (p
->next
))
3211 XWINDOW (p
->next
)->prev
= new;
3214 p
->parent
= o
->parent
;
3216 p
->window_end_valid
= Qnil
;
3217 bzero (&p
->last_cursor
, sizeof p
->last_cursor
);
3219 /* Apportion the available frame space among the two new windows */
3221 if (!NILP (horflag
))
3223 p
->height
= o
->height
;
3225 XSETFASTINT (p
->width
, XFASTINT (o
->width
) - size_int
);
3226 XSETFASTINT (o
->width
, size_int
);
3227 XSETFASTINT (p
->left
, XFASTINT (o
->left
) + size_int
);
3232 p
->width
= o
->width
;
3233 XSETFASTINT (p
->height
, XFASTINT (o
->height
) - size_int
);
3234 XSETFASTINT (o
->height
, size_int
);
3235 XSETFASTINT (p
->top
, XFASTINT (o
->top
) + size_int
);
3238 /* Adjust glyph matrices. */
3240 Fset_window_buffer (new, o
->buffer
);
3244 DEFUN ("enlarge-window", Fenlarge_window
, Senlarge_window
, 1, 2, "p",
3245 "Make current window ARG lines bigger.\n\
3246 From program, optional second arg non-nil means grow sideways ARG columns.")
3248 register Lisp_Object arg
, side
;
3250 CHECK_NUMBER (arg
, 0);
3251 enlarge_window (selected_window
, XINT (arg
), !NILP (side
));
3253 if (! NILP (Vwindow_configuration_change_hook
))
3254 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3259 DEFUN ("shrink-window", Fshrink_window
, Sshrink_window
, 1, 2, "p",
3260 "Make current window ARG lines smaller.\n\
3261 From program, optional second arg non-nil means shrink sideways arg columns.")
3263 register Lisp_Object arg
, side
;
3265 CHECK_NUMBER (arg
, 0);
3266 enlarge_window (selected_window
, -XINT (arg
), !NILP (side
));
3268 if (! NILP (Vwindow_configuration_change_hook
))
3269 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
3275 window_height (window
)
3278 register struct window
*p
= XWINDOW (window
);
3279 return XFASTINT (p
->height
);
3283 window_width (window
)
3286 register struct window
*p
= XWINDOW (window
);
3287 return XFASTINT (p
->width
);
3292 *(widthflag ? &(XWINDOW (w)->left) : &(XWINDOW (w)->top))
3294 #define CURSIZE(w) \
3295 *(widthflag ? &(XWINDOW (w)->width) : &(XWINDOW (w)->height))
3298 /* Enlarge selected_window by DELTA. WIDTHFLAG non-zero means
3299 increase its width. Siblings of the selected window are resized to
3300 fullfil the size request. If they become too small in the process,
3301 they will be deleted. */
3304 enlarge_window (window
, delta
, widthflag
)
3306 int delta
, widthflag
;
3308 Lisp_Object parent
, next
, prev
;
3312 int (*sizefun
) P_ ((Lisp_Object
))
3313 = widthflag
? window_width
: window_height
;
3314 void (*setsizefun
) P_ ((Lisp_Object
, int, int))
3315 = (widthflag
? set_window_width
: set_window_height
);
3317 /* Check values of window_min_width and window_min_height for
3319 check_min_window_sizes ();
3321 /* Give up if this window cannot be resized. */
3322 if (window_fixed_size_p (XWINDOW (window
), widthflag
, 1))
3323 error ("Window is not resizable");
3325 /* Find the parent of the selected window. */
3328 p
= XWINDOW (window
);
3334 error ("No other window to side of this one");
3339 ? !NILP (XWINDOW (parent
)->hchild
)
3340 : !NILP (XWINDOW (parent
)->vchild
))
3346 sizep
= &CURSIZE (window
);
3349 register int maxdelta
;
3351 maxdelta
= (!NILP (parent
) ? (*sizefun
) (parent
) - XINT (*sizep
)
3352 : !NILP (p
->next
) ? ((*sizefun
) (p
->next
)
3353 - window_min_size (XWINDOW (p
->next
),
3355 : !NILP (p
->prev
) ? ((*sizefun
) (p
->prev
)
3356 - window_min_size (XWINDOW (p
->prev
),
3358 /* This is a frame with only one window, a minibuffer-only
3359 or a minibufferless frame. */
3362 if (delta
> maxdelta
)
3363 /* This case traps trying to make the minibuffer
3364 the full frame, or make the only window aside from the
3365 minibuffer the full frame. */
3369 if (XINT (*sizep
) + delta
< window_min_size (XWINDOW (window
), widthflag
, 0, 0))
3371 delete_window (window
);
3378 /* Find the total we can get from other siblings. */
3380 for (next
= p
->next
; ! NILP (next
); next
= XWINDOW (next
)->next
)
3381 maximum
+= (*sizefun
) (next
) - window_min_size (XWINDOW (next
),
3383 for (prev
= p
->prev
; ! NILP (prev
); prev
= XWINDOW (prev
)->prev
)
3384 maximum
+= (*sizefun
) (prev
) - window_min_size (XWINDOW (prev
),
3387 /* If we can get it all from them, do so. */
3388 if (delta
<= maximum
)
3390 Lisp_Object first_unaffected
;
3391 Lisp_Object first_affected
;
3396 first_affected
= window
;
3397 /* Look at one sibling at a time,
3398 moving away from this window in both directions alternately,
3399 and take as much as we can get without deleting that sibling. */
3400 while (delta
!= 0 && (!NILP (next
) || !NILP (prev
)))
3404 int this_one
= ((*sizefun
) (next
)
3405 - window_min_size (XWINDOW (next
),
3406 widthflag
, 0, &fixed_p
));
3409 if (this_one
> delta
)
3412 (*setsizefun
) (next
, (*sizefun
) (next
) - this_one
, 0);
3413 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3418 next
= XWINDOW (next
)->next
;
3426 int this_one
= ((*sizefun
) (prev
)
3427 - window_min_size (XWINDOW (prev
),
3428 widthflag
, 0, &fixed_p
));
3431 if (this_one
> delta
)
3434 first_affected
= prev
;
3436 (*setsizefun
) (prev
, (*sizefun
) (prev
) - this_one
, 0);
3437 (*setsizefun
) (window
, XINT (*sizep
) + this_one
, 0);
3442 prev
= XWINDOW (prev
)->prev
;
3446 xassert (delta
== 0);
3448 /* Now recalculate the edge positions of all the windows affected,
3449 based on the new sizes. */
3450 first_unaffected
= next
;
3451 prev
= first_affected
;
3452 for (next
= XWINDOW (prev
)->next
; ! EQ (next
, first_unaffected
);
3453 prev
= next
, next
= XWINDOW (next
)->next
)
3455 XSETINT (CURBEG (next
), XINT (CURBEG (prev
)) + (*sizefun
) (prev
));
3456 /* This does not change size of NEXT,
3457 but it propagates the new top edge to its children */
3458 (*setsizefun
) (next
, (*sizefun
) (next
), 0);
3463 register int delta1
;
3464 register int opht
= (*sizefun
) (parent
);
3466 /* If trying to grow this window to or beyond size of the parent,
3467 make delta1 so big that, on shrinking back down,
3468 all the siblings end up with less than one line and are deleted. */
3469 if (opht
<= XINT (*sizep
) + delta
)
3470 delta1
= opht
* opht
* 2;
3473 /* Otherwise, make delta1 just right so that if we add
3474 delta1 lines to this window and to the parent, and then
3475 shrink the parent back to its original size, the new
3476 proportional size of this window will increase by delta.
3478 The function size_window will compute the new height h'
3479 of the window from delta1 as:
3482 x = delta1 - delta1/n * n for the 1st resizable child
3485 where n is the number of children that can be resized.
3486 We can ignore x by choosing a delta1 that is a multiple of
3487 n. We want the height of this window to come out as
3497 The number of children n rquals the number of resizable
3498 children of this window + 1 because we know window itself
3499 is resizable (otherwise we would have signalled an error. */
3501 struct window
*w
= XWINDOW (window
);
3505 for (s
= w
->next
; !NILP (s
); s
= XWINDOW (s
)->next
)
3506 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3508 for (s
= w
->prev
; !NILP (s
); s
= XWINDOW (s
)->prev
)
3509 if (!window_fixed_size_p (XWINDOW (s
), widthflag
, 0))
3515 /* Add delta1 lines or columns to this window, and to the parent,
3516 keeping things consistent while not affecting siblings. */
3517 XSETINT (CURSIZE (parent
), opht
+ delta1
);
3518 (*setsizefun
) (window
, XINT (*sizep
) + delta1
, 0);
3520 /* Squeeze out delta1 lines or columns from our parent,
3521 shriking this window and siblings proportionately.
3522 This brings parent back to correct size.
3523 Delta1 was calculated so this makes this window the desired size,
3524 taking it all out of the siblings. */
3525 (*setsizefun
) (parent
, opht
, 0);
3528 XSETFASTINT (p
->last_modified
, 0);
3529 XSETFASTINT (p
->last_overlay_modified
, 0);
3531 /* Adjust glyph matrices. */
3532 adjust_glyphs (XFRAME (WINDOW_FRAME (XWINDOW (window
))));
3540 /***********************************************************************
3541 Resizing Mini-Windows
3542 ***********************************************************************/
3544 static void shrink_window_lowest_first
P_ ((struct window
*, int));
3546 enum save_restore_action
3553 static int save_restore_orig_size
P_ ((struct window
*,
3554 enum save_restore_action
));
3556 /* Shrink windows rooted in window W to HEIGHT. Take the space needed
3557 from lowest windows first. */
3560 shrink_window_lowest_first (w
, height
)
3568 xassert (!MINI_WINDOW_P (w
));
3570 /* Set redisplay hints. */
3571 XSETFASTINT (w
->last_modified
, 0);
3572 XSETFASTINT (w
->last_overlay_modified
, 0);
3573 windows_or_buffers_changed
++;
3574 FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w
))) = 1;
3576 old_height
= XFASTINT (w
->height
);
3577 XSETFASTINT (w
->height
, height
);
3579 if (!NILP (w
->hchild
))
3581 for (child
= w
->hchild
; !NILP (child
); child
= c
->next
)
3583 c
= XWINDOW (child
);
3585 shrink_window_lowest_first (c
, height
);
3588 else if (!NILP (w
->vchild
))
3590 Lisp_Object last_child
;
3591 int delta
= old_height
- height
;
3596 /* Find the last child. We are taking space from lowest windows
3597 first, so we iterate over children from the last child
3599 for (child
= w
->vchild
; !NILP (child
); child
= XWINDOW (child
)->next
)
3602 /* Assign new heights. We leave only MIN_SAFE_WINDOW_HEIGHT. */
3603 for (child
= last_child
; delta
&& !NILP (child
); child
= c
->prev
)
3607 c
= XWINDOW (child
);
3608 this_one
= XFASTINT (c
->height
) - MIN_SAFE_WINDOW_HEIGHT
;
3610 if (this_one
> delta
)
3613 shrink_window_lowest_first (c
, XFASTINT (c
->height
) - this_one
);
3617 /* Compute new positions. */
3618 last_top
= XINT (w
->top
);
3619 for (child
= w
->vchild
; !NILP (child
); child
= c
->next
)
3621 c
= XWINDOW (child
);
3622 c
->top
= make_number (last_top
);
3623 shrink_window_lowest_first (c
, XFASTINT (c
->height
));
3624 last_top
+= XFASTINT (c
->height
);
3630 /* Save, restore, or check positions and sizes in the window tree
3631 rooted at W. ACTION says what to do.
3633 If ACTION is CHECK_ORIG_SIZES, check if orig_top and orig_height
3634 members are valid for all windows in the window tree. Value is
3635 non-zero if they are valid.
3637 If ACTION is SAVE_ORIG_SIZES, save members top and height in
3638 orig_top and orig_height for all windows in the tree.
3640 If ACTION is RESTORE_ORIG_SIZES, restore top and height from
3641 values stored in orig_top and orig_height for all windows. */
3644 save_restore_orig_size (w
, action
)
3646 enum save_restore_action action
;
3652 if (!NILP (w
->hchild
))
3654 if (!save_restore_orig_size (XWINDOW (w
->hchild
), action
))
3657 else if (!NILP (w
->vchild
))
3659 if (!save_restore_orig_size (XWINDOW (w
->vchild
), action
))
3665 case CHECK_ORIG_SIZES
:
3666 if (!INTEGERP (w
->orig_top
) || !INTEGERP (w
->orig_height
))
3670 case SAVE_ORIG_SIZES
:
3671 w
->orig_top
= w
->top
;
3672 w
->orig_height
= w
->height
;
3673 XSETFASTINT (w
->last_modified
, 0);
3674 XSETFASTINT (w
->last_overlay_modified
, 0);
3677 case RESTORE_ORIG_SIZES
:
3678 xassert (INTEGERP (w
->orig_top
) && INTEGERP (w
->orig_height
));
3679 w
->top
= w
->orig_top
;
3680 w
->height
= w
->orig_height
;
3681 w
->orig_height
= w
->orig_top
= Qnil
;
3682 XSETFASTINT (w
->last_modified
, 0);
3683 XSETFASTINT (w
->last_overlay_modified
, 0);
3690 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
3697 /* Grow mini-window W by DELTA lines, DELTA >= 0, or as much as we can
3698 without deleting other windows. */
3701 grow_mini_window (w
, delta
)
3705 struct frame
*f
= XFRAME (w
->frame
);
3706 struct window
*root
;
3708 xassert (MINI_WINDOW_P (w
));
3709 xassert (delta
>= 0);
3711 /* Check values of window_min_width and window_min_height for
3713 check_min_window_sizes ();
3715 /* Compute how much we can enlarge the mini-window without deleting
3717 root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3720 int min_height
= window_min_size (root
, 0, 0, 0);
3721 if (XFASTINT (root
->height
) - delta
< min_height
)
3722 delta
= XFASTINT (root
->height
) - min_height
;
3727 /* Save original window sizes and positions, if not already done. */
3728 if (!save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3729 save_restore_orig_size (root
, SAVE_ORIG_SIZES
);
3731 /* Shrink other windows. */
3732 shrink_window_lowest_first (root
, XFASTINT (root
->height
) - delta
);
3734 /* Grow the mini-window. */
3735 w
->top
= make_number (XFASTINT (root
->top
) + XFASTINT (root
->height
));
3736 w
->height
= make_number (XFASTINT (w
->height
) + delta
);
3737 XSETFASTINT (w
->last_modified
, 0);
3738 XSETFASTINT (w
->last_overlay_modified
, 0);
3745 /* Shrink mini-window W. If there is recorded info about window sizes
3746 before a call to grow_mini_window, restore recorded window sizes.
3747 Otherwise, if the mini-window is higher than 1 line, resize it to 1
3751 shrink_mini_window (w
)
3754 struct frame
*f
= XFRAME (w
->frame
);
3755 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3757 if (save_restore_orig_size (root
, CHECK_ORIG_SIZES
))
3759 save_restore_orig_size (root
, RESTORE_ORIG_SIZES
);
3761 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
3762 windows_or_buffers_changed
= 1;
3764 else if (XFASTINT (w
->height
) > 1)
3767 XSETWINDOW (window
, w
);
3768 enlarge_window (window
, 1 - XFASTINT (w
->height
), 0);
3774 /* Mark window cursors off for all windows in the window tree rooted
3775 at W by setting their phys_cursor_on_p flag to zero. Called from
3776 xterm.c, e.g. when a frame is cleared and thereby all cursors on
3777 the frame are cleared. */
3780 mark_window_cursors_off (w
)
3785 if (!NILP (w
->hchild
))
3786 mark_window_cursors_off (XWINDOW (w
->hchild
));
3787 else if (!NILP (w
->vchild
))
3788 mark_window_cursors_off (XWINDOW (w
->vchild
));
3790 w
->phys_cursor_on_p
= 0;
3792 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3797 /* Return number of lines of text (not counting mode line) in W. */
3800 window_internal_height (w
)
3803 int ht
= XFASTINT (w
->height
);
3805 if (MINI_WINDOW_P (w
))
3808 if (!NILP (w
->parent
) || !NILP (w
->vchild
) || !NILP (w
->hchild
)
3809 || !NILP (w
->next
) || !NILP (w
->prev
)
3810 || FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (w
))))
3817 /* Return the number of columns in W.
3818 Don't count columns occupied by scroll bars or the vertical bar
3819 separating W from the sibling to its right. */
3822 window_internal_width (w
)
3825 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3826 int width
= XINT (w
->width
);
3828 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3829 /* Scroll bars occupy a few columns. */
3830 width
-= FRAME_SCROLL_BAR_COLS (f
);
3831 else if (!WINDOW_RIGHTMOST_P (w
) && !WINDOW_FULL_WIDTH_P (w
))
3832 /* The column of `|' characters separating side-by-side windows
3833 occupies one column only. */
3836 /* On window-systems, areas to the left and right of the window
3837 are used to display bitmaps there. */
3838 if (FRAME_WINDOW_P (f
))
3839 width
-= FRAME_FLAGS_AREA_COLS (f
);
3845 /************************************************************************
3847 ***********************************************************************/
3849 /* Scroll contents of window WINDOW up. If WHOLE is non-zero, scroll
3850 one screen-full, which is defined as the height of the window minus
3851 next_screen_context_lines. If WHOLE is zero, scroll up N lines
3852 instead. Negative values of N mean scroll down. NOERROR non-zero
3853 means don't signal an error if we try to move over BEGV or ZV,
3857 window_scroll (window
, n
, whole
, noerror
)
3863 /* If we must, use the pixel-based version which is much slower than
3864 the line-based one but can handle varying line heights. */
3865 if (FRAME_WINDOW_P (XFRAME (XWINDOW (window
)->frame
)))
3866 window_scroll_pixel_based (window
, n
, whole
, noerror
);
3868 window_scroll_line_based (window
, n
, whole
, noerror
);
3872 /* Implementation of window_scroll that works based on pixel line
3873 heights. See the comment of window_scroll for parameter
3877 window_scroll_pixel_based (window
, n
, whole
, noerror
)
3884 struct window
*w
= XWINDOW (window
);
3885 struct text_pos start
;
3887 int this_scroll_margin
;
3889 /* True if we fiddled the window vscroll field without really scrolling. */
3892 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
3894 /* If PT is not visible in WINDOW, move back one half of
3896 XSETFASTINT (tem
, PT
);
3897 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
3900 /* Move backward half the height of the window. Performance note:
3901 vmotion used here is about 10% faster, but would give wrong
3902 results for variable height lines. */
3903 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3904 it
.current_y
= it
.last_visible_y
;
3905 move_it_vertically (&it
, -it
.last_visible_y
/ 2);
3907 /* The function move_iterator_vertically may move over more than
3908 the specified y-distance. If it->w is small, e.g. a
3909 mini-buffer window, we may end up in front of the window's
3910 display area. This is the case when Start displaying at the
3911 start of the line containing PT in this case. */
3912 if (it
.current_y
<= 0)
3914 init_iterator (&it
, w
, PT
, PT_BYTE
, NULL
, DEFAULT_FACE_ID
);
3915 move_it_vertically (&it
, 0);
3919 start
= it
.current
.pos
;
3922 /* If scroll_preserve_screen_position is non-zero, we try to set
3923 point in the same window line as it is now, so get that line. */
3924 if (!NILP (Vscroll_preserve_screen_position
))
3926 start_display (&it
, w
, start
);
3927 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
3928 preserve_y
= it
.current_y
;
3933 /* Move iterator it from start the specified distance forward or
3934 backward. The result is the new window start. */
3935 start_display (&it
, w
, start
);
3938 int screen_full
= (it
.last_visible_y
3939 - next_screen_context_lines
* CANON_Y_UNIT (it
.f
));
3940 int direction
= n
< 0 ? -1 : 1;
3941 move_it_vertically (&it
, direction
* screen_full
);
3944 move_it_by_lines (&it
, n
, 1);
3946 /* End if we end up at ZV or BEGV. */
3947 if ((n
> 0 && IT_CHARPOS (it
) == ZV
)
3948 || (n
< 0 && IT_CHARPOS (it
) == CHARPOS (start
)))
3950 if (IT_CHARPOS (it
) == ZV
)
3952 if (it
.current_y
+ it
.max_ascent
+ it
.max_descent
3953 > it
.last_visible_y
)
3954 /* The last line was only partially visible, make it fully
3958 - it
.current_y
+ it
.max_ascent
+ it
.max_descent
;
3962 Fsignal (Qend_of_buffer
, Qnil
);
3966 if (w
->vscroll
!= 0)
3967 /* The first line was only partially visible, make it fully
3973 Fsignal (Qbeginning_of_buffer
, Qnil
);
3976 /* If control gets here, then we vscrolled. */
3978 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
3980 /* Don't try to change the window start below. */
3986 /* Set the window start, and set up the window for redisplay. */
3987 set_marker_restricted (w
->start
, make_number (IT_CHARPOS (it
)),
3989 w
->start_at_line_beg
= Fbolp ();
3990 w
->update_mode_line
= Qt
;
3991 XSETFASTINT (w
->last_modified
, 0);
3992 XSETFASTINT (w
->last_overlay_modified
, 0);
3993 /* Set force_start so that redisplay_window will run the
3994 window-scroll-functions. */
3995 w
->force_start
= Qt
;
3998 it
.current_y
= it
.vpos
= 0;
4000 /* Preserve the screen position if we must. */
4001 if (preserve_y
>= 0)
4003 move_it_to (&it
, -1, -1, preserve_y
, -1, MOVE_TO_Y
);
4004 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4008 /* Move PT out of scroll margins. */
4009 this_scroll_margin
= max (0, scroll_margin
);
4010 this_scroll_margin
= min (this_scroll_margin
, XFASTINT (w
->height
) / 4);
4011 this_scroll_margin
*= CANON_Y_UNIT (it
.f
);
4015 /* We moved the window start towards ZV, so PT may be now
4016 in the scroll margin at the top. */
4017 move_it_to (&it
, PT
, -1, -1, -1, MOVE_TO_POS
);
4018 while (it
.current_y
< this_scroll_margin
)
4019 move_it_by_lines (&it
, 1, 1);
4020 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4024 int charpos
, bytepos
;
4026 /* We moved the window start towards BEGV, so PT may be now
4027 in the scroll margin at the bottom. */
4028 move_it_to (&it
, PT
, -1,
4029 it
.last_visible_y
- this_scroll_margin
- 1, -1,
4030 MOVE_TO_POS
| MOVE_TO_Y
);
4032 /* Save our position, in case it's correct. */
4033 charpos
= IT_CHARPOS (it
);
4034 bytepos
= IT_BYTEPOS (it
);
4036 /* See if point is on a partially visible line at the end. */
4037 move_it_by_lines (&it
, 1, 1);
4038 if (it
.current_y
> it
.last_visible_y
)
4039 /* The last line was only partially visible, so back up two
4040 lines to make sure we're on a fully visible line. */
4042 move_it_by_lines (&it
, -2, 0);
4043 SET_PT_BOTH (IT_CHARPOS (it
), IT_BYTEPOS (it
));
4046 /* No, the position we saved is OK, so use it. */
4047 SET_PT_BOTH (charpos
, bytepos
);
4053 /* Implementation of window_scroll that works based on screen lines.
4054 See the comment of window_scroll for parameter descriptions. */
4057 window_scroll_line_based (window
, n
, whole
, noerror
)
4063 register struct window
*w
= XWINDOW (window
);
4064 register int opoint
= PT
, opoint_byte
= PT_BYTE
;
4065 register int pos
, pos_byte
;
4066 register int ht
= window_internal_height (w
);
4067 register Lisp_Object tem
;
4071 struct position posit
;
4074 startpos
= marker_position (w
->start
);
4076 posit
= *compute_motion (startpos
, 0, 0, 0,
4078 window_internal_width (w
), XINT (w
->hscroll
),
4080 original_vpos
= posit
.vpos
;
4082 XSETFASTINT (tem
, PT
);
4083 tem
= Fpos_visible_in_window_p (tem
, window
, Qnil
);
4087 Fvertical_motion (make_number (- (ht
/ 2)), window
);
4092 lose
= n
< 0 && PT
== BEGV
;
4093 Fvertical_motion (make_number (n
), window
);
4097 SET_PT_BOTH (opoint
, opoint_byte
);
4104 Fsignal (Qbeginning_of_buffer
, Qnil
);
4109 int this_scroll_margin
= scroll_margin
;
4111 /* Don't use a scroll margin that is negative or too large. */
4112 if (this_scroll_margin
< 0)
4113 this_scroll_margin
= 0;
4115 if (XINT (w
->height
) < 4 * scroll_margin
)
4116 this_scroll_margin
= XINT (w
->height
) / 4;
4118 set_marker_restricted_both (w
->start
, w
->buffer
, pos
, pos_byte
);
4119 w
->start_at_line_beg
= bolp
;
4120 w
->update_mode_line
= Qt
;
4121 XSETFASTINT (w
->last_modified
, 0);
4122 XSETFASTINT (w
->last_overlay_modified
, 0);
4123 /* Set force_start so that redisplay_window will run
4124 the window-scroll-functions. */
4125 w
->force_start
= Qt
;
4127 if (whole
&& !NILP (Vscroll_preserve_screen_position
))
4129 SET_PT_BOTH (pos
, pos_byte
);
4130 Fvertical_motion (make_number (original_vpos
), window
);
4132 /* If we scrolled forward, put point enough lines down
4133 that it is outside the scroll margin. */
4138 if (this_scroll_margin
> 0)
4140 SET_PT_BOTH (pos
, pos_byte
);
4141 Fvertical_motion (make_number (this_scroll_margin
), window
);
4147 if (top_margin
<= opoint
)
4148 SET_PT_BOTH (opoint
, opoint_byte
);
4149 else if (!NILP (Vscroll_preserve_screen_position
))
4151 SET_PT_BOTH (pos
, pos_byte
);
4152 Fvertical_motion (make_number (original_vpos
), window
);
4155 SET_PT (top_margin
);
4161 /* If we scrolled backward, put point near the end of the window
4162 but not within the scroll margin. */
4163 SET_PT_BOTH (pos
, pos_byte
);
4164 tem
= Fvertical_motion (make_number (ht
- this_scroll_margin
), window
);
4165 if (XFASTINT (tem
) == ht
- this_scroll_margin
)
4168 bottom_margin
= PT
+ 1;
4170 if (bottom_margin
> opoint
)
4171 SET_PT_BOTH (opoint
, opoint_byte
);
4174 if (!NILP (Vscroll_preserve_screen_position
))
4176 SET_PT_BOTH (pos
, pos_byte
);
4177 Fvertical_motion (make_number (original_vpos
), window
);
4180 Fvertical_motion (make_number (-1), window
);
4189 Fsignal (Qend_of_buffer
, Qnil
);
4194 /* Scroll selected_window up or down. If N is nil, scroll a
4195 screen-full which is defined as the height of the window minus
4196 next_screen_context_lines. If N is the symbol `-', scroll.
4197 DIRECTION may be 1 meaning to scroll down, or -1 meaning to scroll
4198 up. This is the guts of Fscroll_up and Fscroll_down. */
4201 scroll_command (n
, direction
)
4205 register int defalt
;
4206 int count
= specpdl_ptr
- specpdl
;
4208 xassert (abs (direction
) == 1);
4210 /* If selected window's buffer isn't current, make it current for
4211 the moment. But don't screw up if window_scroll gets an error. */
4212 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
4214 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4215 Fset_buffer (XWINDOW (selected_window
)->buffer
);
4217 /* Make redisplay consider other windows than just selected_window. */
4218 ++windows_or_buffers_changed
;
4221 defalt
= (window_internal_height (XWINDOW (selected_window
))
4222 - next_screen_context_lines
);
4223 defalt
= direction
* (defalt
< 1 ? 1 : defalt
);
4226 window_scroll (selected_window
, defalt
, 1, 0);
4227 else if (EQ (n
, Qminus
))
4228 window_scroll (selected_window
, - defalt
, 1, 0);
4231 n
= Fprefix_numeric_value (n
);
4232 window_scroll (selected_window
, XINT (n
) * direction
, 0, 0);
4235 unbind_to (count
, Qnil
);
4238 DEFUN ("scroll-up", Fscroll_up
, Sscroll_up
, 0, 1, "P",
4239 "Scroll text of current window upward ARG lines; or near full screen if no ARG.\n\
4240 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4241 Negative ARG means scroll downward.\n\
4242 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4243 When calling from a program, supply as argument a number, nil, or `-'.")
4247 scroll_command (arg
, 1);
4251 DEFUN ("scroll-down", Fscroll_down
, Sscroll_down
, 0, 1, "P",
4252 "Scroll text of current window down ARG lines; or near full screen if no ARG.\n\
4253 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4254 Negative ARG means scroll upward.\n\
4255 If ARG is the atom `-', scroll upward by nearly full screen.\n\
4256 When calling from a program, supply as argument a number, nil, or `-'.")
4260 scroll_command (arg
, -1);
4264 DEFUN ("other-window-for-scrolling", Fother_window_for_scrolling
, Sother_window_for_scrolling
, 0, 0, 0,
4265 "Return the other window for \"other window scroll\" commands.\n\
4266 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4267 specifies the window.\n\
4268 If `other-window-scroll-buffer' is non-nil, a window\n\
4269 showing that buffer is used.")
4274 if (MINI_WINDOW_P (XWINDOW (selected_window
))
4275 && !NILP (Vminibuf_scroll_window
))
4276 window
= Vminibuf_scroll_window
;
4277 /* If buffer is specified, scroll that buffer. */
4278 else if (!NILP (Vother_window_scroll_buffer
))
4280 window
= Fget_buffer_window (Vother_window_scroll_buffer
, Qnil
);
4282 window
= Fdisplay_buffer (Vother_window_scroll_buffer
, Qt
, Qnil
);
4286 /* Nothing specified; look for a neighboring window on the same
4288 window
= Fnext_window (selected_window
, Qnil
, Qnil
);
4290 if (EQ (window
, selected_window
))
4291 /* That didn't get us anywhere; look for a window on another
4294 window
= Fnext_window (window
, Qnil
, Qt
);
4295 while (! FRAME_VISIBLE_P (XFRAME (WINDOW_FRAME (XWINDOW (window
))))
4296 && ! EQ (window
, selected_window
));
4299 CHECK_LIVE_WINDOW (window
, 0);
4301 if (EQ (window
, selected_window
))
4302 error ("There is no other window");
4307 DEFUN ("scroll-other-window", Fscroll_other_window
, Sscroll_other_window
, 0, 1, "P",
4308 "Scroll next window upward ARG lines; or near full screen if no ARG.\n\
4309 A near full screen is `next-screen-context-lines' less than a full screen.\n\
4310 The next window is the one below the current one; or the one at the top\n\
4311 if the current one is at the bottom. Negative ARG means scroll downward.\n\
4312 If ARG is the atom `-', scroll downward by nearly full screen.\n\
4313 When calling from a program, supply as argument a number, nil, or `-'.\n\
4315 If in the minibuffer, `minibuffer-scroll-window' if non-nil\n\
4316 specifies the window to scroll.\n\
4317 If `other-window-scroll-buffer' is non-nil, scroll the window\n\
4318 showing that buffer, popping the buffer up if necessary.")
4320 register Lisp_Object arg
;
4322 register Lisp_Object window
;
4323 register int defalt
;
4324 register struct window
*w
;
4325 register int count
= specpdl_ptr
- specpdl
;
4327 window
= Fother_window_for_scrolling ();
4329 w
= XWINDOW (window
);
4330 defalt
= window_internal_height (w
) - next_screen_context_lines
;
4331 if (defalt
< 1) defalt
= 1;
4333 /* Don't screw up if window_scroll gets an error. */
4334 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
4335 ++windows_or_buffers_changed
;
4337 Fset_buffer (w
->buffer
);
4338 SET_PT (marker_position (w
->pointm
));
4341 window_scroll (window
, defalt
, 1, 1);
4342 else if (EQ (arg
, Qminus
))
4343 window_scroll (window
, -defalt
, 1, 1);
4348 CHECK_NUMBER (arg
, 0);
4349 window_scroll (window
, XINT (arg
), 0, 1);
4352 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
4353 unbind_to (count
, Qnil
);
4358 DEFUN ("scroll-left", Fscroll_left
, Sscroll_left
, 0, 1, "P",
4359 "Scroll selected window display ARG columns left.\n\
4360 Default for ARG is window width minus 2.")
4362 register Lisp_Object arg
;
4366 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
4368 arg
= Fprefix_numeric_value (arg
);
4371 Fset_window_hscroll (selected_window
,
4372 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
4376 DEFUN ("scroll-right", Fscroll_right
, Sscroll_right
, 0, 1, "P",
4377 "Scroll selected window display ARG columns right.\n\
4378 Default for ARG is window width minus 2.")
4380 register Lisp_Object arg
;
4383 XSETFASTINT (arg
, window_internal_width (XWINDOW (selected_window
)) - 2);
4385 arg
= Fprefix_numeric_value (arg
);
4388 Fset_window_hscroll (selected_window
,
4389 make_number (XINT (XWINDOW (selected_window
)->hscroll
)
4393 DEFUN ("recenter", Frecenter
, Srecenter
, 0, 1, "P",
4394 "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\
4395 The desired position of point is always relative to the current window.\n\
4396 Just C-u as prefix means put point in the center of the window.\n\
4397 If ARG is omitted or nil, erases the entire frame and then\n\
4398 redraws with point in the center of the current window.")
4400 register Lisp_Object arg
;
4402 register struct window
*w
= XWINDOW (selected_window
);
4403 register int ht
= window_internal_height (w
);
4404 struct position pos
;
4405 struct buffer
*buf
= XBUFFER (w
->buffer
);
4406 struct buffer
*obuf
= current_buffer
;
4410 extern int frame_garbaged
;
4413 /* Invalidate pixel data calculated for all compositions. */
4414 for (i
= 0; i
< n_compositions
; i
++)
4415 composition_table
[i
]->font
= NULL
;
4417 Fredraw_frame (w
->frame
);
4418 SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w
)));
4419 XSETFASTINT (arg
, ht
/ 2);
4421 else if (CONSP (arg
)) /* Just C-u. */
4423 XSETFASTINT (arg
, ht
/ 2);
4427 arg
= Fprefix_numeric_value (arg
);
4428 CHECK_NUMBER (arg
, 0);
4432 XSETINT (arg
, XINT (arg
) + ht
);
4434 set_buffer_internal (buf
);
4435 pos
= *vmotion (PT
, - XINT (arg
), w
);
4437 set_marker_both (w
->start
, w
->buffer
, pos
.bufpos
, pos
.bytepos
);
4438 w
->start_at_line_beg
= ((pos
.bytepos
== BEGV_BYTE
4439 || FETCH_BYTE (pos
.bytepos
- 1) == '\n')
4441 w
->force_start
= Qt
;
4442 set_buffer_internal (obuf
);
4448 /* Value is the number of lines actually displayed in window W,
4449 as opposed to its height. */
4452 displayed_window_lines (w
)
4456 struct text_pos start
;
4457 int height
= window_box_height (w
);
4458 struct buffer
*old_buffer
;
4461 if (XBUFFER (w
->buffer
) != current_buffer
)
4463 old_buffer
= current_buffer
;
4464 set_buffer_internal (XBUFFER (w
->buffer
));
4469 SET_TEXT_POS_FROM_MARKER (start
, w
->start
);
4470 start_display (&it
, w
, start
);
4471 move_it_vertically (&it
, height
);
4474 set_buffer_internal (old_buffer
);
4476 /* Add in empty lines at the bottom of the window. */
4477 bottom_y
= it
.current_y
+ it
.max_ascent
+ it
.max_descent
;
4478 if (bottom_y
< height
)
4480 struct frame
*f
= XFRAME (w
->frame
);
4481 int rest
= height
- bottom_y
;
4482 int lines
= (rest
+ CANON_Y_UNIT (f
) - 1) / CANON_Y_UNIT (f
);
4486 else if (it
.current_y
< height
&& bottom_y
> height
)
4487 /* Partially visible line at the bottom. */
4496 DEFUN ("move-to-window-line", Fmove_to_window_line
, Smove_to_window_line
,
4498 "Position point relative to window.\n\
4499 With no argument, position point at center of window.\n\
4500 An argument specifies vertical position within the window;\n\
4501 zero means top of window, negative means relative to bottom of window.")
4505 struct window
*w
= XWINDOW (selected_window
);
4509 window
= selected_window
;
4510 start
= marker_position (w
->start
);
4511 if (start
< BEGV
|| start
> ZV
)
4513 int height
= window_internal_height (w
);
4514 Fvertical_motion (make_number (- (height
/ 2)), window
);
4515 set_marker_both (w
->start
, w
->buffer
, PT
, PT_BYTE
);
4516 w
->start_at_line_beg
= Fbolp ();
4517 w
->force_start
= Qt
;
4520 Fgoto_char (w
->start
);
4522 lines
= displayed_window_lines (w
);
4524 XSETFASTINT (arg
, lines
/ 2);
4527 arg
= Fprefix_numeric_value (arg
);
4529 XSETINT (arg
, XINT (arg
) + lines
);
4532 return Fvertical_motion (arg
, window
);
4537 /***********************************************************************
4538 Window Configuration
4539 ***********************************************************************/
4541 struct save_window_data
4543 EMACS_INT size_from_Lisp_Vector_struct
;
4544 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4545 Lisp_Object frame_width
, frame_height
, frame_menu_bar_lines
;
4546 Lisp_Object frame_tool_bar_lines
;
4547 Lisp_Object selected_frame
;
4548 Lisp_Object current_window
;
4549 Lisp_Object current_buffer
;
4550 Lisp_Object minibuf_scroll_window
;
4551 Lisp_Object root_window
;
4552 Lisp_Object focus_frame
;
4553 /* Record the values of window-min-width and window-min-height
4554 so that window sizes remain consistent with them. */
4555 Lisp_Object min_width
, min_height
;
4556 /* A vector, each of whose elements is a struct saved_window
4558 Lisp_Object saved_windows
;
4561 /* This is saved as a Lisp_Vector */
4564 /* these first two must agree with struct Lisp_Vector in lisp.h */
4565 EMACS_INT size_from_Lisp_Vector_struct
;
4566 struct Lisp_Vector
*next_from_Lisp_Vector_struct
;
4569 Lisp_Object buffer
, start
, pointm
, mark
;
4570 Lisp_Object left
, top
, width
, height
, hscroll
;
4571 Lisp_Object parent
, prev
;
4572 Lisp_Object start_at_line_beg
;
4573 Lisp_Object display_table
;
4574 Lisp_Object orig_top
, orig_height
;
4576 #define SAVED_WINDOW_VECTOR_SIZE 16 /* Arg to Fmake_vector */
4578 #define SAVED_WINDOW_N(swv,n) \
4579 ((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
4581 DEFUN ("window-configuration-p", Fwindow_configuration_p
, Swindow_configuration_p
, 1, 1, 0,
4582 "Return t if OBJECT is a window-configuration object.")
4586 if (WINDOW_CONFIGURATIONP (object
))
4591 DEFUN ("window-configuration-frame", Fwindow_configuration_frame
, Swindow_configuration_frame
, 1, 1, 0,
4592 "Return the frame that CONFIG, a window-configuration object, is about.")
4596 register struct save_window_data
*data
;
4597 struct Lisp_Vector
*saved_windows
;
4599 if (! WINDOW_CONFIGURATIONP (config
))
4600 wrong_type_argument (Qwindow_configuration_p
, config
);
4602 data
= (struct save_window_data
*) XVECTOR (config
);
4603 saved_windows
= XVECTOR (data
->saved_windows
);
4604 return XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4607 DEFUN ("set-window-configuration", Fset_window_configuration
,
4608 Sset_window_configuration
, 1, 1, 0,
4609 "Set the configuration of windows and buffers as specified by CONFIGURATION.\n\
4610 CONFIGURATION must be a value previously returned\n\
4611 by `current-window-configuration' (which see).\n\
4612 If CONFIGURATION was made from a frame that is now deleted,\n\
4613 only frame-independent values can be restored. In this case,\n\
4614 the return value is nil. Otherwise the value is t.")
4616 Lisp_Object configuration
;
4618 register struct save_window_data
*data
;
4619 struct Lisp_Vector
*saved_windows
;
4620 Lisp_Object new_current_buffer
;
4625 while (!WINDOW_CONFIGURATIONP (configuration
))
4626 wrong_type_argument (Qwindow_configuration_p
, configuration
);
4628 data
= (struct save_window_data
*) XVECTOR (configuration
);
4629 saved_windows
= XVECTOR (data
->saved_windows
);
4631 new_current_buffer
= data
->current_buffer
;
4632 if (NILP (XBUFFER (new_current_buffer
)->name
))
4633 new_current_buffer
= Qnil
;
4636 if (XBUFFER (new_current_buffer
) == current_buffer
)
4640 frame
= XWINDOW (SAVED_WINDOW_N (saved_windows
, 0)->window
)->frame
;
4643 /* If f is a dead frame, don't bother rebuilding its window tree.
4644 However, there is other stuff we should still try to do below. */
4645 if (FRAME_LIVE_P (f
))
4647 register struct window
*w
;
4648 register struct saved_window
*p
;
4649 struct window
*root_window
;
4650 struct window
**leaf_windows
;
4654 /* If the frame has been resized since this window configuration was
4655 made, we change the frame to the size specified in the
4656 configuration, restore the configuration, and then resize it
4657 back. We keep track of the prevailing height in these variables. */
4658 int previous_frame_height
= FRAME_HEIGHT (f
);
4659 int previous_frame_width
= FRAME_WIDTH (f
);
4660 int previous_frame_menu_bar_lines
= FRAME_MENU_BAR_LINES (f
);
4661 int previous_frame_tool_bar_lines
= FRAME_TOOL_BAR_LINES (f
);
4663 /* The mouse highlighting code could get screwed up
4664 if it runs during this. */
4667 if (XFASTINT (data
->frame_height
) != previous_frame_height
4668 || XFASTINT (data
->frame_width
) != previous_frame_width
)
4669 change_frame_size (f
, XFASTINT (data
->frame_height
),
4670 XFASTINT (data
->frame_width
), 0, 0, 0);
4671 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4672 if (XFASTINT (data
->frame_menu_bar_lines
)
4673 != previous_frame_menu_bar_lines
)
4674 x_set_menu_bar_lines (f
, data
->frame_menu_bar_lines
, make_number (0));
4675 #ifdef HAVE_WINDOW_SYSTEM
4676 if (XFASTINT (data
->frame_tool_bar_lines
)
4677 != previous_frame_tool_bar_lines
)
4678 x_set_tool_bar_lines (f
, data
->frame_tool_bar_lines
, make_number (0));
4682 /* "Swap out" point from the selected window
4683 into its buffer. We do this now, before
4684 restoring the window contents, and prevent it from
4685 being done later on when we select a new window. */
4686 if (! NILP (XWINDOW (selected_window
)->buffer
))
4688 w
= XWINDOW (selected_window
);
4689 set_marker_both (w
->pointm
,
4691 BUF_PT (XBUFFER (w
->buffer
)),
4692 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4695 windows_or_buffers_changed
++;
4696 FRAME_WINDOW_SIZES_CHANGED (f
) = 1;
4698 /* Problem: Freeing all matrices and later allocating them again
4699 is a serious redisplay flickering problem. What we would
4700 really like to do is to free only those matrices not reused
4702 root_window
= XWINDOW (FRAME_ROOT_WINDOW (f
));
4704 = (struct window
**) alloca (count_windows (root_window
)
4705 * sizeof (struct window
*));
4706 n_leaf_windows
= get_leaf_windows (root_window
, leaf_windows
, 0);
4708 /* Temporarily avoid any problems with windows that are smaller
4709 than they are supposed to be. */
4710 window_min_height
= 1;
4711 window_min_width
= 1;
4714 Mark all windows now on frame as "deleted".
4715 Restoring the new configuration "undeletes" any that are in it.
4717 Save their current buffers in their height fields, since we may
4718 need it later, if a buffer saved in the configuration is now
4720 delete_all_subwindows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
4722 for (k
= 0; k
< saved_windows
->size
; k
++)
4724 p
= SAVED_WINDOW_N (saved_windows
, k
);
4725 w
= XWINDOW (p
->window
);
4728 if (!NILP (p
->parent
))
4729 w
->parent
= SAVED_WINDOW_N (saved_windows
,
4730 XFASTINT (p
->parent
))->window
;
4734 if (!NILP (p
->prev
))
4736 w
->prev
= SAVED_WINDOW_N (saved_windows
,
4737 XFASTINT (p
->prev
))->window
;
4738 XWINDOW (w
->prev
)->next
= p
->window
;
4743 if (!NILP (w
->parent
))
4745 if (EQ (p
->width
, XWINDOW (w
->parent
)->width
))
4747 XWINDOW (w
->parent
)->vchild
= p
->window
;
4748 XWINDOW (w
->parent
)->hchild
= Qnil
;
4752 XWINDOW (w
->parent
)->hchild
= p
->window
;
4753 XWINDOW (w
->parent
)->vchild
= Qnil
;
4758 /* If we squirreled away the buffer in the window's height,
4760 if (BUFFERP (w
->height
))
4761 w
->buffer
= w
->height
;
4764 w
->width
= p
->width
;
4765 w
->height
= p
->height
;
4766 w
->hscroll
= p
->hscroll
;
4767 w
->display_table
= p
->display_table
;
4768 w
->orig_top
= p
->orig_top
;
4769 w
->orig_height
= p
->orig_height
;
4770 XSETFASTINT (w
->last_modified
, 0);
4771 XSETFASTINT (w
->last_overlay_modified
, 0);
4773 /* Reinstall the saved buffer and pointers into it. */
4774 if (NILP (p
->buffer
))
4775 w
->buffer
= p
->buffer
;
4778 if (!NILP (XBUFFER (p
->buffer
)->name
))
4779 /* If saved buffer is alive, install it. */
4781 w
->buffer
= p
->buffer
;
4782 w
->start_at_line_beg
= p
->start_at_line_beg
;
4783 set_marker_restricted (w
->start
, p
->start
, w
->buffer
);
4784 set_marker_restricted (w
->pointm
, p
->pointm
, w
->buffer
);
4785 Fset_marker (XBUFFER (w
->buffer
)->mark
,
4786 p
->mark
, w
->buffer
);
4788 /* As documented in Fcurrent_window_configuration, don't
4789 save the location of point in the buffer which was current
4790 when the window configuration was recorded. */
4791 if (!EQ (p
->buffer
, new_current_buffer
)
4792 && XBUFFER (p
->buffer
) == current_buffer
)
4793 Fgoto_char (w
->pointm
);
4795 else if (NILP (w
->buffer
) || NILP (XBUFFER (w
->buffer
)->name
))
4796 /* Else unless window has a live buffer, get one. */
4798 w
->buffer
= Fcdr (Fcar (Vbuffer_alist
));
4799 /* This will set the markers to beginning of visible
4801 set_marker_restricted (w
->start
, make_number (0), w
->buffer
);
4802 set_marker_restricted (w
->pointm
, make_number (0),w
->buffer
);
4803 w
->start_at_line_beg
= Qt
;
4806 /* Keeping window's old buffer; make sure the markers
4809 /* Set window markers at start of visible range. */
4810 if (XMARKER (w
->start
)->buffer
== 0)
4811 set_marker_restricted (w
->start
, make_number (0),
4813 if (XMARKER (w
->pointm
)->buffer
== 0)
4814 set_marker_restricted_both (w
->pointm
, w
->buffer
,
4815 BUF_PT (XBUFFER (w
->buffer
)),
4816 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
4817 w
->start_at_line_beg
= Qt
;
4822 FRAME_ROOT_WINDOW (f
) = data
->root_window
;
4823 /* Prevent "swapping out point" in the old selected window
4824 using the buffer that has been restored into it.
4825 That swapping out has already been done,
4826 near the beginning of this function. */
4827 selected_window
= Qnil
;
4828 Fselect_window (data
->current_window
);
4829 XBUFFER (XWINDOW (selected_window
)->buffer
)->last_selected_window
4832 if (NILP (data
->focus_frame
)
4833 || (FRAMEP (data
->focus_frame
)
4834 && FRAME_LIVE_P (XFRAME (data
->focus_frame
))))
4835 Fredirect_frame_focus (frame
, data
->focus_frame
);
4837 #if 0 /* I don't understand why this is needed, and it causes problems
4838 when the frame's old selected window has been deleted. */
4839 if (f
!= selected_frame
&& FRAME_WINDOW_P (f
))
4840 do_switch_frame (WINDOW_FRAME (XWINDOW (data
->root_window
)),
4844 /* Set the screen height to the value it had before this function. */
4845 if (previous_frame_height
!= FRAME_HEIGHT (f
)
4846 || previous_frame_width
!= FRAME_WIDTH (f
))
4847 change_frame_size (f
, previous_frame_height
, previous_frame_width
,
4849 #if defined (HAVE_WINDOW_SYSTEM) || defined (MSDOS)
4850 if (previous_frame_menu_bar_lines
!= FRAME_MENU_BAR_LINES (f
))
4851 x_set_menu_bar_lines (f
, make_number (previous_frame_menu_bar_lines
),
4853 #ifdef HAVE_WINDOW_SYSTEM
4854 if (previous_frame_tool_bar_lines
!= FRAME_TOOL_BAR_LINES (f
))
4855 x_set_tool_bar_lines (f
, make_number (previous_frame_tool_bar_lines
),
4860 /* Now, free glyph matrices in windows that were not reused. */
4861 for (i
= n
= 0; i
< n_leaf_windows
; ++i
)
4863 if (NILP (leaf_windows
[i
]->buffer
))
4865 /* Assert it's not reused as a combination. */
4866 xassert (NILP (leaf_windows
[i
]->hchild
)
4867 && NILP (leaf_windows
[i
]->vchild
));
4868 free_window_matrices (leaf_windows
[i
]);
4869 SET_FRAME_GARBAGED (f
);
4871 else if (EQ (leaf_windows
[i
]->buffer
, new_current_buffer
))
4875 /* If more than one window shows the new and old current buffer,
4876 don't try to preserve point in that buffer. */
4877 if (old_point
> 0 && n
> 1)
4884 /* Fselect_window will have made f the selected frame, so we
4885 reselect the proper frame here. Fhandle_switch_frame will change the
4886 selected window too, but that doesn't make the call to
4887 Fselect_window above totally superfluous; it still sets f's
4889 if (FRAME_LIVE_P (XFRAME (data
->selected_frame
)))
4890 do_switch_frame (data
->selected_frame
, Qnil
, 0);
4892 if (! NILP (Vwindow_configuration_change_hook
)
4893 && ! NILP (Vrun_hooks
))
4894 call1 (Vrun_hooks
, Qwindow_configuration_change_hook
);
4897 if (!NILP (new_current_buffer
))
4899 Fset_buffer (new_current_buffer
);
4901 /* If the buffer that is current now is the same
4902 that was current before setting the window configuration,
4903 don't alter its PT. */
4908 /* Restore the minimum heights recorded in the configuration. */
4909 window_min_height
= XINT (data
->min_height
);
4910 window_min_width
= XINT (data
->min_width
);
4912 Vminibuf_scroll_window
= data
->minibuf_scroll_window
;
4914 return (FRAME_LIVE_P (f
) ? Qt
: Qnil
);
4917 /* Mark all windows now on frame as deleted
4918 by setting their buffers to nil. */
4921 delete_all_subwindows (w
)
4922 register struct window
*w
;
4924 if (!NILP (w
->next
))
4925 delete_all_subwindows (XWINDOW (w
->next
));
4926 if (!NILP (w
->vchild
))
4927 delete_all_subwindows (XWINDOW (w
->vchild
));
4928 if (!NILP (w
->hchild
))
4929 delete_all_subwindows (XWINDOW (w
->hchild
));
4931 w
->height
= w
->buffer
; /* See Fset_window_configuration for excuse. */
4933 if (!NILP (w
->buffer
))
4936 /* We set all three of these fields to nil, to make sure that we can
4937 distinguish this dead window from any live window. Live leaf
4938 windows will have buffer set, and combination windows will have
4939 vchild or hchild set. */
4944 Vwindow_list
= Qnil
;
4948 count_windows (window
)
4949 register struct window
*window
;
4951 register int count
= 1;
4952 if (!NILP (window
->next
))
4953 count
+= count_windows (XWINDOW (window
->next
));
4954 if (!NILP (window
->vchild
))
4955 count
+= count_windows (XWINDOW (window
->vchild
));
4956 if (!NILP (window
->hchild
))
4957 count
+= count_windows (XWINDOW (window
->hchild
));
4962 /* Fill vector FLAT with leaf windows under W, starting at index I.
4963 Value is last index + 1. */
4966 get_leaf_windows (w
, flat
, i
)
4968 struct window
**flat
;
4973 if (!NILP (w
->hchild
))
4974 i
= get_leaf_windows (XWINDOW (w
->hchild
), flat
, i
);
4975 else if (!NILP (w
->vchild
))
4976 i
= get_leaf_windows (XWINDOW (w
->vchild
), flat
, i
);
4980 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4987 /* Return a pointer to the glyph W's physical cursor is on. Value is
4988 null if W's current matrix is invalid, so that no meaningfull glyph
4992 get_phys_cursor_glyph (w
)
4995 struct glyph_row
*row
;
4996 struct glyph
*glyph
;
4998 if (w
->phys_cursor
.vpos
>= 0
4999 && w
->phys_cursor
.vpos
< w
->current_matrix
->nrows
5000 && (row
= MATRIX_ROW (w
->current_matrix
, w
->phys_cursor
.vpos
),
5002 && row
->used
[TEXT_AREA
] > w
->phys_cursor
.hpos
)
5003 glyph
= row
->glyphs
[TEXT_AREA
] + w
->phys_cursor
.hpos
;
5012 save_window_save (window
, vector
, i
)
5014 struct Lisp_Vector
*vector
;
5017 register struct saved_window
*p
;
5018 register struct window
*w
;
5019 register Lisp_Object tem
;
5021 for (;!NILP (window
); window
= w
->next
)
5023 p
= SAVED_WINDOW_N (vector
, i
);
5024 w
= XWINDOW (window
);
5026 XSETFASTINT (w
->temslot
, i
++);
5028 p
->buffer
= w
->buffer
;
5031 p
->width
= w
->width
;
5032 p
->height
= w
->height
;
5033 p
->hscroll
= w
->hscroll
;
5034 p
->display_table
= w
->display_table
;
5035 p
->orig_top
= w
->orig_top
;
5036 p
->orig_height
= w
->orig_height
;
5037 if (!NILP (w
->buffer
))
5039 /* Save w's value of point in the window configuration.
5040 If w is the selected window, then get the value of point
5041 from the buffer; pointm is garbage in the selected window. */
5042 if (EQ (window
, selected_window
))
5044 p
->pointm
= Fmake_marker ();
5045 set_marker_both (p
->pointm
, w
->buffer
,
5046 BUF_PT (XBUFFER (w
->buffer
)),
5047 BUF_PT_BYTE (XBUFFER (w
->buffer
)));
5050 p
->pointm
= Fcopy_marker (w
->pointm
, Qnil
);
5052 p
->start
= Fcopy_marker (w
->start
, Qnil
);
5053 p
->start_at_line_beg
= w
->start_at_line_beg
;
5055 tem
= XBUFFER (w
->buffer
)->mark
;
5056 p
->mark
= Fcopy_marker (tem
, Qnil
);
5063 p
->start_at_line_beg
= Qnil
;
5066 if (NILP (w
->parent
))
5069 p
->parent
= XWINDOW (w
->parent
)->temslot
;
5074 p
->prev
= XWINDOW (w
->prev
)->temslot
;
5076 if (!NILP (w
->vchild
))
5077 i
= save_window_save (w
->vchild
, vector
, i
);
5078 if (!NILP (w
->hchild
))
5079 i
= save_window_save (w
->hchild
, vector
, i
);
5085 DEFUN ("current-window-configuration", Fcurrent_window_configuration
,
5086 Scurrent_window_configuration
, 0, 1, 0,
5087 "Return an object representing the current window configuration of FRAME.\n\
5088 If FRAME is nil or omitted, use the selected frame.\n\
5089 This describes the number of windows, their sizes and current buffers,\n\
5090 and for each displayed buffer, where display starts, and the positions of\n\
5091 point and mark. An exception is made for point in the current buffer:\n\
5092 its value is -not- saved.\n\
5093 This also records the currently selected frame, and FRAME's focus\n\
5094 redirection (see `redirect-frame-focus').")
5098 register Lisp_Object tem
;
5099 register int n_windows
;
5100 register struct save_window_data
*data
;
5101 register struct Lisp_Vector
*vec
;
5106 frame
= selected_frame
;
5107 CHECK_LIVE_FRAME (frame
, 0);
5110 n_windows
= count_windows (XWINDOW (FRAME_ROOT_WINDOW (f
)));
5111 vec
= allocate_vectorlike (VECSIZE (struct save_window_data
));
5112 for (i
= 0; i
< VECSIZE (struct save_window_data
); i
++)
5113 vec
->contents
[i
] = Qnil
;
5114 vec
->size
= VECSIZE (struct save_window_data
);
5115 data
= (struct save_window_data
*)vec
;
5117 XSETFASTINT (data
->frame_width
, FRAME_WIDTH (f
));
5118 XSETFASTINT (data
->frame_height
, FRAME_HEIGHT (f
));
5119 XSETFASTINT (data
->frame_menu_bar_lines
, FRAME_MENU_BAR_LINES (f
));
5120 XSETFASTINT (data
->frame_tool_bar_lines
, FRAME_TOOL_BAR_LINES (f
));
5121 data
->selected_frame
= selected_frame
;
5122 data
->current_window
= FRAME_SELECTED_WINDOW (f
);
5123 XSETBUFFER (data
->current_buffer
, current_buffer
);
5124 data
->minibuf_scroll_window
= Vminibuf_scroll_window
;
5125 data
->root_window
= FRAME_ROOT_WINDOW (f
);
5126 data
->focus_frame
= FRAME_FOCUS_FRAME (f
);
5127 XSETINT (data
->min_height
, window_min_height
);
5128 XSETINT (data
->min_width
, window_min_width
);
5129 tem
= Fmake_vector (make_number (n_windows
), Qnil
);
5130 data
->saved_windows
= tem
;
5131 for (i
= 0; i
< n_windows
; i
++)
5132 XVECTOR (tem
)->contents
[i
]
5133 = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE
), Qnil
);
5134 save_window_save (FRAME_ROOT_WINDOW (f
), XVECTOR (tem
), 0);
5135 XSETWINDOW_CONFIGURATION (tem
, data
);
5139 DEFUN ("save-window-excursion", Fsave_window_excursion
, Ssave_window_excursion
,
5141 "Execute body, preserving window sizes and contents.\n\
5142 Restore which buffer appears in which window, where display starts,\n\
5143 and the value of point and mark for each window.\n\
5144 Also restore the choice of selected window.\n\
5145 Also restore which buffer is current.\n\
5146 Does not restore the value of point in current buffer.")
5150 register Lisp_Object val
;
5151 register int count
= specpdl_ptr
- specpdl
;
5153 record_unwind_protect (Fset_window_configuration
,
5154 Fcurrent_window_configuration (Qnil
));
5155 val
= Fprogn (args
);
5156 return unbind_to (count
, val
);
5160 /***********************************************************************
5162 ***********************************************************************/
5164 DEFUN ("set-window-margins", Fset_window_margins
, Sset_window_margins
,
5166 "Set width of marginal areas of window WINDOW.\n\
5167 If window is nil, set margins of the currently selected window.\n\
5168 First parameter LEFT-WIDTH specifies the number of character\n\
5169 cells to reserve for the left marginal area. Second parameter\n\
5170 RIGHT-WIDTH does the same for the right marginal area.\n\
5171 A nil width parameter means no margin.")
5172 (window
, left
, right
)
5173 Lisp_Object window
, left
, right
;
5175 struct window
*w
= decode_window (window
);
5178 CHECK_NUMBER_OR_FLOAT (left
, 1);
5180 CHECK_NUMBER_OR_FLOAT (right
, 2);
5182 /* Check widths < 0 and translate a zero width to nil.
5183 Margins that are too wide have to be checked elsewhere. */
5184 if ((INTEGERP (left
) && XINT (left
) < 0)
5185 || (FLOATP (left
) && XFLOAT_DATA (left
) <= 0))
5186 XSETFASTINT (left
, 0);
5187 if (INTEGERP (left
) && XFASTINT (left
) == 0)
5190 if ((INTEGERP (right
) && XINT (right
) < 0)
5191 || (FLOATP (right
) && XFLOAT_DATA (right
) <= 0))
5192 XSETFASTINT (right
, 0);
5193 if (INTEGERP (right
) && XFASTINT (right
) == 0)
5196 w
->left_margin_width
= left
;
5197 w
->right_margin_width
= right
;
5199 ++windows_or_buffers_changed
;
5200 adjust_glyphs (XFRAME (WINDOW_FRAME (w
)));
5205 DEFUN ("window-margins", Fwindow_margins
, Swindow_margins
,
5207 "Get width of marginal areas of window WINDOW.\n\
5208 If WINDOW is omitted or nil, use the currently selected window.\n\
5209 Value is a cons of the form (LEFT-WIDTH . RIGHT-WIDTH).\n\
5210 If a marginal area does not exist, its width will be returned\n\
5215 struct window
*w
= decode_window (window
);
5216 return Fcons (w
->left_margin_width
, w
->right_margin_width
);
5221 /***********************************************************************
5223 ***********************************************************************/
5225 DEFUN ("window-vscroll", Fwindow_vscroll
, Swindow_vscroll
, 0, 1, 0,
5226 "Return the amount by which WINDOW is scrolled vertically.\n\
5227 Use the selected window if WINDOW is nil or omitted.\n\
5228 Value is a multiple of the canonical character height of WINDOW.")
5237 window
= selected_window
;
5239 CHECK_WINDOW (window
, 0);
5240 w
= XWINDOW (window
);
5241 f
= XFRAME (w
->frame
);
5243 if (FRAME_WINDOW_P (f
))
5244 result
= CANON_Y_FROM_PIXEL_Y (f
, -w
->vscroll
);
5246 result
= make_number (0);
5251 DEFUN ("set-window-vscroll", Fset_window_vscroll
, Sset_window_vscroll
,
5253 "Set amount by which WINDOW should be scrolled vertically to VSCROLL.\n\
5254 WINDOW nil or omitted means use the selected window. VSCROLL is a\n\
5255 non-negative multiple of the canonical character height of WINDOW.")
5257 Lisp_Object window
, vscroll
;
5263 window
= selected_window
;
5265 CHECK_WINDOW (window
, 0);
5266 CHECK_NUMBER_OR_FLOAT (vscroll
, 1);
5268 w
= XWINDOW (window
);
5269 f
= XFRAME (w
->frame
);
5271 if (FRAME_WINDOW_P (f
))
5273 int old_dy
= w
->vscroll
;
5275 w
->vscroll
= - CANON_Y_UNIT (f
) * XFLOATINT (vscroll
);
5276 w
->vscroll
= min (w
->vscroll
, 0);
5278 /* Adjust glyph matrix of the frame if the virtual display
5279 area becomes larger than before. */
5280 if (w
->vscroll
< 0 && w
->vscroll
< old_dy
)
5283 /* Prevent redisplay shortcuts. */
5284 XBUFFER (w
->buffer
)->prevent_redisplay_optimizations_p
= 1;
5287 return Fwindow_vscroll (window
);
5291 /* Call FN for all leaf windows on frame F. FN is called with the
5292 first argument being a pointer to the leaf window, and with
5293 additional argument USER_DATA. Stops when FN returns 0. */
5296 foreach_window (f
, fn
, user_data
)
5298 int (* fn
) P_ ((struct window
*, void *));
5301 foreach_window_1 (XWINDOW (FRAME_ROOT_WINDOW (f
)), fn
, user_data
);
5305 /* Helper function for foreach_window. Call FN for all leaf windows
5306 reachable from W. FN is called with the first argument being a
5307 pointer to the leaf window, and with additional argument USER_DATA.
5308 Stop when FN returns 0. Value is 0 if stopped by FN. */
5311 foreach_window_1 (w
, fn
, user_data
)
5313 int (* fn
) P_ ((struct window
*, void *));
5318 for (cont
= 1; w
&& cont
;)
5320 if (!NILP (w
->hchild
))
5321 cont
= foreach_window_1 (XWINDOW (w
->hchild
), fn
, user_data
);
5322 else if (!NILP (w
->vchild
))
5323 cont
= foreach_window_1 (XWINDOW (w
->vchild
), fn
, user_data
);
5325 cont
= fn (w
, user_data
);
5327 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
5334 /* Freeze or unfreeze the window start of W if unless it is a
5335 mini-window or the selected window. FREEZE_P non-null means freeze
5336 the window start. */
5339 freeze_window_start (w
, freeze_p
)
5343 if (w
== XWINDOW (selected_window
)
5344 || MINI_WINDOW_P (w
)
5345 || (MINI_WINDOW_P (XWINDOW (selected_window
))
5346 && ! NILP (Vminibuf_scroll_window
)
5347 && w
== XWINDOW (Vminibuf_scroll_window
)))
5350 w
->frozen_window_start_p
= freeze_p
!= NULL
;
5355 /* Freeze or unfreeze the window starts of all leaf windows on frame
5356 F, except the selected window and a mini-window. FREEZE_P non-zero
5357 means freeze the window start. */
5360 freeze_window_starts (f
, freeze_p
)
5364 foreach_window (f
, freeze_window_start
, (void *) (freeze_p
? f
: 0));
5368 /***********************************************************************
5370 ***********************************************************************/
5372 /* Return 1 if window configurations C1 and C2
5373 describe the same state of affairs. This is used by Fequal. */
5376 compare_window_configurations (c1
, c2
, ignore_positions
)
5378 int ignore_positions
;
5380 register struct save_window_data
*d1
, *d2
;
5381 struct Lisp_Vector
*sw1
, *sw2
;
5384 if (!WINDOW_CONFIGURATIONP (c1
))
5385 wrong_type_argument (Qwindow_configuration_p
, c1
);
5386 if (!WINDOW_CONFIGURATIONP (c2
))
5387 wrong_type_argument (Qwindow_configuration_p
, c2
);
5389 d1
= (struct save_window_data
*) XVECTOR (c1
);
5390 d2
= (struct save_window_data
*) XVECTOR (c2
);
5391 sw1
= XVECTOR (d1
->saved_windows
);
5392 sw2
= XVECTOR (d2
->saved_windows
);
5394 if (! EQ (d1
->frame_width
, d2
->frame_width
))
5396 if (! EQ (d1
->frame_height
, d2
->frame_height
))
5398 if (! EQ (d1
->frame_menu_bar_lines
, d2
->frame_menu_bar_lines
))
5400 if (! EQ (d1
->selected_frame
, d2
->selected_frame
))
5402 /* Don't compare the current_window field directly.
5403 Instead see w1_is_current and w2_is_current, below. */
5404 if (! EQ (d1
->current_buffer
, d2
->current_buffer
))
5406 if (! ignore_positions
)
5407 if (! EQ (d1
->minibuf_scroll_window
, d2
->minibuf_scroll_window
))
5409 /* Don't compare the root_window field.
5410 We don't require the two configurations
5411 to use the same window object,
5412 and the two root windows must be equivalent
5413 if everything else compares equal. */
5414 if (! EQ (d1
->focus_frame
, d2
->focus_frame
))
5416 if (! EQ (d1
->min_width
, d2
->min_width
))
5418 if (! EQ (d1
->min_height
, d2
->min_height
))
5421 /* Verify that the two confis have the same number of windows. */
5422 if (sw1
->size
!= sw2
->size
)
5425 for (i
= 0; i
< sw1
->size
; i
++)
5427 struct saved_window
*p1
, *p2
;
5428 int w1_is_current
, w2_is_current
;
5430 p1
= SAVED_WINDOW_N (sw1
, i
);
5431 p2
= SAVED_WINDOW_N (sw2
, i
);
5433 /* Verify that the current windows in the two
5434 configurations correspond to each other. */
5435 w1_is_current
= EQ (d1
->current_window
, p1
->window
);
5436 w2_is_current
= EQ (d2
->current_window
, p2
->window
);
5438 if (w1_is_current
!= w2_is_current
)
5441 /* Verify that the corresponding windows do match. */
5442 if (! EQ (p1
->buffer
, p2
->buffer
))
5444 if (! EQ (p1
->left
, p2
->left
))
5446 if (! EQ (p1
->top
, p2
->top
))
5448 if (! EQ (p1
->width
, p2
->width
))
5450 if (! EQ (p1
->height
, p2
->height
))
5452 if (! EQ (p1
->display_table
, p2
->display_table
))
5454 if (! EQ (p1
->parent
, p2
->parent
))
5456 if (! EQ (p1
->prev
, p2
->prev
))
5458 if (! ignore_positions
)
5460 if (! EQ (p1
->hscroll
, p2
->hscroll
))
5462 if (! EQ (p1
->start_at_line_beg
, p2
->start_at_line_beg
))
5464 if (NILP (Fequal (p1
->start
, p2
->start
)))
5466 if (NILP (Fequal (p1
->pointm
, p2
->pointm
)))
5468 if (NILP (Fequal (p1
->mark
, p2
->mark
)))
5476 DEFUN ("compare-window-configurations", Fcompare_window_configurations
,
5477 Scompare_window_configurations
, 2, 2, 0,
5478 "Compare two window configurations as regards the structure of windows.\n\
5479 This function ignores details such as the values of point and mark\n\
5480 and scrolling positions.")
5484 if (compare_window_configurations (x
, y
, 1))
5492 struct frame
*f
= make_terminal_frame ();
5493 XSETFRAME (selected_frame
, f
);
5494 Vterminal_frame
= selected_frame
;
5495 minibuf_window
= f
->minibuffer_window
;
5496 selected_window
= f
->selected_window
;
5497 last_nonminibuf_frame
= f
;
5499 window_initialized
= 1;
5505 Vwindow_list
= Qnil
;
5511 Qleft_bitmap_area
= intern ("left-bitmap-area");
5512 staticpro (&Qleft_bitmap_area
);
5513 Qright_bitmap_area
= intern ("right-bitmap-area");
5514 staticpro (&Qright_bitmap_area
);
5516 Qwindow_size_fixed
= intern ("window-size-fixed");
5517 staticpro (&Qwindow_size_fixed
);
5519 staticpro (&Qwindow_configuration_change_hook
);
5520 Qwindow_configuration_change_hook
5521 = intern ("window-configuration-change-hook");
5523 Qwindowp
= intern ("windowp");
5524 staticpro (&Qwindowp
);
5526 Qwindow_configuration_p
= intern ("window-configuration-p");
5527 staticpro (&Qwindow_configuration_p
);
5529 Qwindow_live_p
= intern ("window-live-p");
5530 staticpro (&Qwindow_live_p
);
5532 Qtemp_buffer_show_hook
= intern ("temp-buffer-show-hook");
5533 staticpro (&Qtemp_buffer_show_hook
);
5535 staticpro (&Vwindow_list
);
5537 DEFVAR_LISP ("temp-buffer-show-function", &Vtemp_buffer_show_function
,
5538 "Non-nil means call as function to display a help buffer.\n\
5539 The function is called with one argument, the buffer to be displayed.\n\
5540 Used by `with-output-to-temp-buffer'.\n\
5541 If this function is used, then it must do the entire job of showing\n\
5542 the buffer; `temp-buffer-show-hook' is not run unless this function runs it.");
5543 Vtemp_buffer_show_function
= Qnil
;
5545 DEFVAR_LISP ("display-buffer-function", &Vdisplay_buffer_function
,
5546 "If non-nil, function to call to handle `display-buffer'.\n\
5547 It will receive two args, the buffer and a flag which if non-nil means\n\
5548 that the currently selected window is not acceptable.\n\
5549 Commands such as `switch-to-buffer-other-window' and `find-file-other-window'\n\
5550 work using this function.");
5551 Vdisplay_buffer_function
= Qnil
;
5553 DEFVAR_LISP ("even-window-heights", &Veven_window_heights
,
5554 "*If non-nil, `display-buffer' should even the window heights.\n\
5555 If nil, `display-buffer' will leave the window configuration alone.");
5556 Veven_window_heights
= Qt
;
5558 DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window
,
5559 "Non-nil means it is the window that C-M-v in minibuffer should scroll.");
5560 Vminibuf_scroll_window
= Qnil
;
5562 DEFVAR_LISP ("other-window-scroll-buffer", &Vother_window_scroll_buffer
,
5563 "If non-nil, this is a buffer and \\[scroll-other-window] should scroll its window.");
5564 Vother_window_scroll_buffer
= Qnil
;
5566 DEFVAR_BOOL ("pop-up-frames", &pop_up_frames
,
5567 "*Non-nil means `display-buffer' should make a separate frame.");
5570 DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames
,
5571 "*Non-nil means `display-buffer' should reuse frames.\n\
5572 If the buffer in question is already displayed in a frame, raise that frame.");
5573 display_buffer_reuse_frames
= 0;
5575 DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function
,
5576 "Function to call to handle automatic new frame creation.\n\
5577 It is called with no arguments and should return a newly created frame.\n\
5579 A typical value might be `(lambda () (new-frame pop-up-frame-alist))'\n\
5580 where `pop-up-frame-alist' would hold the default frame parameters.");
5581 Vpop_up_frame_function
= Qnil
;
5583 DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names
,
5584 "*List of buffer names that should have their own special frames.\n\
5585 Displaying a buffer whose name is in this list makes a special frame for it\n\
5586 using `special-display-function'. See also `special-display-regexps'.\n\
5588 An element of the list can be a list instead of just a string.\n\
5589 There are two ways to use a list as an element:\n\
5590 (BUFFER FRAME-PARAMETERS...) (BUFFER FUNCTION OTHER-ARGS...)\n\
5591 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5592 In the latter case, FUNCTION is called with BUFFER as the first argument,\n\
5593 followed by OTHER-ARGS--it can display BUFFER in any way it likes.\n\
5594 All this is done by the function found in `special-display-function'.\n\
5596 If this variable appears \"not to work\", because you add a name to it\n\
5597 but that buffer still appears in the selected window, look at the\n\
5598 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5599 Those variables take precedence over this one.");
5600 Vspecial_display_buffer_names
= Qnil
;
5602 DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps
,
5603 "*List of regexps saying which buffers should have their own special frames.\n\
5604 If a buffer name matches one of these regexps, it gets its own frame.\n\
5605 Displaying a buffer whose name is in this list makes a special frame for it\n\
5606 using `special-display-function'.\n\
5608 An element of the list can be a list instead of just a string.\n\
5609 There are two ways to use a list as an element:\n\
5610 (REGEXP FRAME-PARAMETERS...) (REGEXP FUNCTION OTHER-ARGS...)\n\
5611 In the first case, FRAME-PARAMETERS are used to create the frame.\n\
5612 In the latter case, FUNCTION is called with the buffer as first argument,\n\
5613 followed by OTHER-ARGS--it can display the buffer in any way it likes.\n\
5614 All this is done by the function found in `special-display-function'.\n\
5616 If this variable appears \"not to work\", because you add a regexp to it\n\
5617 but the matching buffers still appear in the selected window, look at the\n\
5618 values of `same-window-buffer-names' and `same-window-regexps'.\n\
5619 Those variables take precedence over this one.");
5620 Vspecial_display_regexps
= Qnil
;
5622 DEFVAR_LISP ("special-display-function", &Vspecial_display_function
,
5623 "Function to call to make a new frame for a special buffer.\n\
5624 It is called with two arguments, the buffer and optional buffer specific\n\
5625 data, and should return a window displaying that buffer.\n\
5626 The default value makes a separate frame for the buffer,\n\
5627 using `special-display-frame-alist' to specify the frame parameters.\n\
5629 A buffer is special if its is listed in `special-display-buffer-names'\n\
5630 or matches a regexp in `special-display-regexps'.");
5631 Vspecial_display_function
= Qnil
;
5633 DEFVAR_LISP ("same-window-buffer-names", &Vsame_window_buffer_names
,
5634 "*List of buffer names that should appear in the selected window.\n\
5635 Displaying one of these buffers using `display-buffer' or `pop-to-buffer'\n\
5636 switches to it in the selected window, rather than making it appear\n\
5637 in some other window.\n\
5639 An element of the list can be a cons cell instead of just a string.\n\
5640 Then the car must be a string, which specifies the buffer name.\n\
5641 This is for compatibility with `special-display-buffer-names';\n\
5642 the cdr of the cons cell is ignored.\n\
5644 See also `same-window-regexps'.");
5645 Vsame_window_buffer_names
= Qnil
;
5647 DEFVAR_LISP ("same-window-regexps", &Vsame_window_regexps
,
5648 "*List of regexps saying which buffers should appear in the selected window.\n\
5649 If a buffer name matches one of these regexps, then displaying it\n\
5650 using `display-buffer' or `pop-to-buffer' switches to it\n\
5651 in the selected window, rather than making it appear in some other window.\n\
5653 An element of the list can be a cons cell instead of just a string.\n\
5654 Then the car must be a string, which specifies the buffer name.\n\
5655 This is for compatibility with `special-display-buffer-names';\n\
5656 the cdr of the cons cell is ignored.\n\
5658 See also `same-window-buffer-names'.");
5659 Vsame_window_regexps
= Qnil
;
5661 DEFVAR_BOOL ("pop-up-windows", &pop_up_windows
,
5662 "*Non-nil means display-buffer should make new windows.");
5665 DEFVAR_INT ("next-screen-context-lines", &next_screen_context_lines
,
5666 "*Number of lines of continuity when scrolling by screenfuls.");
5667 next_screen_context_lines
= 2;
5669 DEFVAR_INT ("split-height-threshold", &split_height_threshold
,
5670 "*display-buffer would prefer to split the largest window if this large.\n\
5671 If there is only one window, it is split regardless of this value.");
5672 split_height_threshold
= 500;
5674 DEFVAR_INT ("window-min-height", &window_min_height
,
5675 "*Delete any window less than this tall (including its mode line).");
5676 window_min_height
= 4;
5678 DEFVAR_INT ("window-min-width", &window_min_width
,
5679 "*Delete any window less than this wide.");
5680 window_min_width
= 10;
5682 DEFVAR_LISP ("scroll-preserve-screen-position",
5683 &Vscroll_preserve_screen_position
,
5684 "*Nonzero means scroll commands move point to keep its screen line unchanged.");
5685 Vscroll_preserve_screen_position
= Qnil
;
5687 DEFVAR_LISP ("window-configuration-change-hook",
5688 &Vwindow_configuration_change_hook
,
5689 "Functions to call when window configuration changes.\n\
5690 The selected frame is the one whose configuration has changed.");
5691 Vwindow_configuration_change_hook
= Qnil
;
5693 defsubr (&Sselected_window
);
5694 defsubr (&Sminibuffer_window
);
5695 defsubr (&Swindow_minibuffer_p
);
5696 defsubr (&Swindowp
);
5697 defsubr (&Swindow_live_p
);
5698 defsubr (&Spos_visible_in_window_p
);
5699 defsubr (&Swindow_buffer
);
5700 defsubr (&Swindow_height
);
5701 defsubr (&Swindow_width
);
5702 defsubr (&Swindow_hscroll
);
5703 defsubr (&Sset_window_hscroll
);
5704 defsubr (&Swindow_redisplay_end_trigger
);
5705 defsubr (&Sset_window_redisplay_end_trigger
);
5706 defsubr (&Swindow_edges
);
5707 defsubr (&Scoordinates_in_window_p
);
5708 defsubr (&Swindow_at
);
5709 defsubr (&Swindow_point
);
5710 defsubr (&Swindow_start
);
5711 defsubr (&Swindow_end
);
5712 defsubr (&Sset_window_point
);
5713 defsubr (&Sset_window_start
);
5714 defsubr (&Swindow_dedicated_p
);
5715 defsubr (&Sset_window_dedicated_p
);
5716 defsubr (&Swindow_display_table
);
5717 defsubr (&Sset_window_display_table
);
5718 defsubr (&Snext_window
);
5719 defsubr (&Sprevious_window
);
5720 defsubr (&Sother_window
);
5721 defsubr (&Sget_lru_window
);
5722 defsubr (&Sget_largest_window
);
5723 defsubr (&Sget_buffer_window
);
5724 defsubr (&Sdelete_other_windows
);
5725 defsubr (&Sdelete_windows_on
);
5726 defsubr (&Sreplace_buffer_in_windows
);
5727 defsubr (&Sdelete_window
);
5728 defsubr (&Sset_window_buffer
);
5729 defsubr (&Sselect_window
);
5730 defsubr (&Sspecial_display_p
);
5731 defsubr (&Ssame_window_p
);
5732 defsubr (&Sdisplay_buffer
);
5733 defsubr (&Ssplit_window
);
5734 defsubr (&Senlarge_window
);
5735 defsubr (&Sshrink_window
);
5736 defsubr (&Sscroll_up
);
5737 defsubr (&Sscroll_down
);
5738 defsubr (&Sscroll_left
);
5739 defsubr (&Sscroll_right
);
5740 defsubr (&Sother_window_for_scrolling
);
5741 defsubr (&Sscroll_other_window
);
5742 defsubr (&Srecenter
);
5743 defsubr (&Smove_to_window_line
);
5744 defsubr (&Swindow_configuration_p
);
5745 defsubr (&Swindow_configuration_frame
);
5746 defsubr (&Sset_window_configuration
);
5747 defsubr (&Scurrent_window_configuration
);
5748 defsubr (&Ssave_window_excursion
);
5749 defsubr (&Sset_window_margins
);
5750 defsubr (&Swindow_margins
);
5751 defsubr (&Swindow_vscroll
);
5752 defsubr (&Sset_window_vscroll
);
5753 defsubr (&Scompare_window_configurations
);
5754 defsubr (&Swindow_list
);
5760 initial_define_key (control_x_map
, '1', "delete-other-windows");
5761 initial_define_key (control_x_map
, '2', "split-window");
5762 initial_define_key (control_x_map
, '0', "delete-window");
5763 initial_define_key (control_x_map
, 'o', "other-window");
5764 initial_define_key (control_x_map
, '^', "enlarge-window");
5765 initial_define_key (control_x_map
, '<', "scroll-left");
5766 initial_define_key (control_x_map
, '>', "scroll-right");
5768 initial_define_key (global_map
, Ctl ('V'), "scroll-up");
5769 initial_define_key (meta_map
, Ctl ('V'), "scroll-other-window");
5770 initial_define_key (meta_map
, 'v', "scroll-down");
5772 initial_define_key (global_map
, Ctl('L'), "recenter");
5773 initial_define_key (meta_map
, 'r', "move-to-window-line");