1 ;;; window.el --- GNU Emacs window commands aside from those written in C
3 ;; Copyright (C) 1985, 1989, 1992-1994, 2000-2011
4 ;; Free Software Foundation, Inc.
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software: you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation, either version 3 of the License, or
15 ;; (at your option) any later version.
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
27 ;; Window tree functions.
31 (eval-when-compile (require 'cl
))
33 (defmacro save-selected-window
(&rest body
)
34 "Execute BODY, then select the previously selected window.
35 The value returned is the value of the last form in BODY.
37 This macro saves and restores the selected window, as well as the
38 selected window in each frame. If the previously selected window
39 is no longer live, then whatever window is selected at the end of
40 BODY remains selected. If the previously selected window of some
41 frame is no longer live at the end of BODY, that frame's selected
44 This macro saves and restores the current buffer, since otherwise
45 its normal operation could make a different buffer current. The
46 order of recently selected windows and the buffer list ordering
47 are not altered by this macro (unless they are altered in BODY)."
48 (declare (indent 0) (debug t
))
49 `(let ((save-selected-window-window (selected-window))
50 ;; It is necessary to save all of these, because calling
51 ;; select-window changes frame-selected-window for whatever
52 ;; frame that window is in.
53 (save-selected-window-alist
54 (mapcar (lambda (frame) (cons frame
(frame-selected-window frame
)))
59 (dolist (elt save-selected-window-alist
)
60 (and (frame-live-p (car elt
))
61 (window-live-p (cdr elt
))
62 (set-frame-selected-window (car elt
) (cdr elt
) 'norecord
)))
63 (when (window-live-p save-selected-window-window
)
64 (select-window save-selected-window-window
'norecord
))))))
66 ;; The following two functions are like `window-next-sibling' and
67 ;; `window-prev-sibling' but the WINDOW argument is _not_ optional (so
68 ;; they don't substitute the selected window for nil), and they return
69 ;; nil when WINDOW doesn't have a parent (like a frame's root window or
70 ;; a minibuffer window).
71 (defsubst window-right
(window)
72 "Return WINDOW's right sibling.
73 Return nil if WINDOW is the root window of its frame. WINDOW can
75 (and window
(window-parent window
) (window-next-sibling window
)))
77 (defsubst window-left
(window)
78 "Return WINDOW's left sibling.
79 Return nil if WINDOW is the root window of its frame. WINDOW can
81 (and window
(window-parent window
) (window-prev-sibling window
)))
83 (defsubst window-child
(window)
84 "Return WINDOW's first child window."
85 (or (window-top-child window
) (window-left-child window
)))
87 (defun window-child-count (window)
88 "Return number of WINDOW's child windows."
90 (when (and (windowp window
) (setq window
(window-child window
)))
92 (setq count
(1+ count
))
93 (setq window
(window-next-sibling window
))))
96 (defun window-last-child (window)
97 "Return last child window of WINDOW."
98 (when (and (windowp window
) (setq window
(window-child window
)))
99 (while (window-next-sibling window
)
100 (setq window
(window-next-sibling window
))))
103 (defsubst window-any-p
(object)
104 "Return t if OBJECT denotes a live or internal window."
105 (and (windowp object
)
106 (or (window-buffer object
) (window-child object
))
109 (defsubst window-normalize-buffer
(buffer-or-name)
110 "Return buffer specified by BUFFER-OR-NAME.
111 BUFFER-OR-NAME must be either a buffer or a string naming a live
112 buffer and defaults to the current buffer."
114 ((not buffer-or-name
)
116 ((bufferp buffer-or-name
)
117 (if (buffer-live-p buffer-or-name
)
119 (error "Buffer %s is not a live buffer" buffer-or-name
)))
120 ((get-buffer buffer-or-name
))
122 (error "No such buffer %s" buffer-or-name
))))
124 (defsubst window-normalize-frame
(frame)
125 "Return frame specified by FRAME.
126 FRAME must be a live frame and defaults to the selected frame."
128 (if (frame-live-p frame
)
130 (error "%s is not a live frame" frame
))
133 (defsubst window-normalize-any-window
(window)
134 "Return window specified by WINDOW.
135 WINDOW must be a window that has not been deleted and defaults to
136 the selected window."
138 (if (window-any-p window
)
140 (error "%s is not a window" window
))
143 (defsubst window-normalize-live-window
(window)
144 "Return live window specified by WINDOW.
145 WINDOW must be a live window and defaults to the selected one."
147 (if (and (windowp window
) (window-buffer window
))
149 (error "%s is not a live window" window
))
152 (defvar ignore-window-parameters nil
153 "If non-nil, standard functions ignore window parameters.
154 The functions currently affected by this are `split-window',
155 `delete-window', `delete-other-windows' and `other-window'.
157 An application may bind this to a non-nil value around calls to
158 these functions to inhibit processing of window parameters.")
160 (defconst window-safe-min-height
1
161 "The absolute minimum number of lines of a window.
162 Anything less might crash Emacs.")
164 (defcustom window-min-height
4
165 "The minimum number of lines of any window.
166 The value has to accommodate a mode- or header-line if present.
167 A value less than `window-safe-min-height' is ignored. The value
168 of this variable is honored when windows are resized or split.
170 Applications should never rebind this variable. To resize a
171 window to a height less than the one specified here, an
172 application should instead call `window-resize' with a non-nil
173 IGNORE argument. In order to have `split-window' make a window
174 shorter, explictly specify the SIZE argument of that function."
179 (defconst window-safe-min-width
2
180 "The absolute minimum number of columns of a window.
181 Anything less might crash Emacs.")
183 (defcustom window-min-width
10
184 "The minimum number of columns of any window.
185 The value has to accommodate margins, fringes, or scrollbars if
186 present. A value less than `window-safe-min-width' is ignored.
187 The value of this variable is honored when windows are resized or
190 Applications should never rebind this variable. To resize a
191 window to a width less than the one specified here, an
192 application should instead call `window-resize' with a non-nil
193 IGNORE argument. In order to have `split-window' make a window
194 narrower, explictly specify the SIZE argument of that function."
199 (defun window-iso-combination-p (&optional window horizontal
)
200 "If WINDOW is a vertical combination return WINDOW's first child.
201 WINDOW can be any window and defaults to the selected one.
202 Optional argument HORIZONTAL non-nil means return WINDOW's first
203 child if WINDOW is a horizontal combination."
204 (setq window
(window-normalize-any-window window
))
206 (window-left-child window
)
207 (window-top-child window
)))
209 (defsubst window-iso-combined-p
(&optional window horizontal
)
210 "Return non-nil if and only if WINDOW is vertically combined.
211 WINDOW can be any window and defaults to the selected one.
212 Optional argument HORIZONTAL non-nil means return non-nil if and
213 only if WINDOW is horizontally combined."
214 (setq window
(window-normalize-any-window window
))
215 (let ((parent (window-parent window
)))
216 (and parent
(window-iso-combination-p parent horizontal
))))
218 (defun window-iso-combinations (&optional window horizontal
)
219 "Return largest number of vertically arranged subwindows of WINDOW.
220 WINDOW can be any window and defaults to the selected one.
221 Optional argument HORIZONTAL non-nil means to return the largest
222 number of horizontally arranged subwindows of WINDOW."
223 (setq window
(window-normalize-any-window window
))
225 ((window-live-p window
)
226 ;; If WINDOW is live, return 1.
228 ((window-iso-combination-p window horizontal
)
229 ;; If WINDOW is iso-combined, return the sum of the values for all
230 ;; subwindows of WINDOW.
231 (let ((child (window-child window
))
235 (+ (window-iso-combinations child horizontal
)
237 (setq child
(window-right child
)))
240 ;; If WINDOW is not iso-combined, return the maximum value of any
241 ;; subwindow of WINDOW.
242 (let ((child (window-child window
))
246 (max (window-iso-combinations child horizontal
)
248 (setq child
(window-right child
)))
251 (defun walk-window-tree-1 (proc walk-window-tree-window any
&optional sub-only
)
252 "Helper function for `walk-window-tree' and `walk-window-subtree'."
253 (let (walk-window-tree-buffer)
254 (while walk-window-tree-window
255 (setq walk-window-tree-buffer
256 (window-buffer walk-window-tree-window
))
257 (when (or walk-window-tree-buffer any
)
258 (funcall proc walk-window-tree-window
))
259 (unless walk-window-tree-buffer
261 proc
(window-left-child walk-window-tree-window
) any
)
263 proc
(window-top-child walk-window-tree-window
) any
))
265 (setq walk-window-tree-window nil
)
266 (setq walk-window-tree-window
267 (window-right walk-window-tree-window
))))))
269 (defun walk-window-tree (proc &optional frame any
)
270 "Run function PROC on each live window of FRAME.
271 PROC must be a function with one argument - a window. FRAME must
272 be a live frame and defaults to the selected one. ANY, if
273 non-nil means to run PROC on all live and internal windows of
276 This function performs a pre-order, depth-first traversal of the
277 window tree. If PROC changes the window tree, the result is
279 (let ((walk-window-tree-frame (window-normalize-frame frame
)))
281 proc
(frame-root-window walk-window-tree-frame
) any
)))
283 (defun walk-window-subtree (proc &optional window any
)
284 "Run function PROC on each live subwindow of WINDOW.
285 WINDOW defaults to the selected window. PROC must be a function
286 with one argument - a window. ANY, if non-nil means to run PROC
287 on all live and internal subwindows of WINDOW.
289 This function performs a pre-order, depth-first traversal of the
290 window tree rooted at WINDOW. If PROC changes that window tree,
291 the result is unpredictable."
292 (setq window
(window-normalize-any-window window
))
293 (walk-window-tree-1 proc window any t
))
295 (defun windows-with-parameter (parameter &optional value frame any values
)
296 "Return a list of all windows on FRAME with PARAMETER non-nil.
297 FRAME defaults to the selected frame. Optional argument VALUE
298 non-nil means only return windows whose window-parameter value of
299 PARAMETER equals VALUE \(comparison is done using `equal').
300 Optional argument ANY non-nil means consider internal windows
301 too. Optional argument VALUES non-nil means return a list of cons
302 cells whose car is the value of the parameter and whose cdr is
304 (let (this-value windows
)
307 (when (and (setq this-value
(window-parameter window parameter
))
308 (or (not value
) (or (equal value this-value
))))
311 (cons (cons this-value window
) windows
)
312 (cons window windows
)))))
317 (defun window-with-parameter (parameter &optional value frame any
)
318 "Return first window on FRAME with PARAMETER non-nil.
319 FRAME defaults to the selected frame. Optional argument VALUE
320 non-nil means only return a window whose window-parameter value
321 for PARAMETER equals VALUE \(comparison is done with `equal').
322 Optional argument ANY non-nil means consider internal windows
324 (let (this-value windows
)
328 (when (and (setq this-value
(window-parameter window parameter
))
329 (or (not value
) (equal value this-value
)))
330 (throw 'found window
)))
334 (defun window-atom-root (&optional window
)
335 "Return root of atomic window WINDOW is a part of.
336 WINDOW can be any window and defaults to the selected one.
337 Return nil if WINDOW is not part of a atomic window."
338 (setq window
(window-normalize-any-window window
))
340 (while (and window
(window-parameter window
'window-atom
))
342 (setq window
(window-parent window
)))
345 (defun window-make-atom (window)
346 "Make WINDOW an atomic window.
347 WINDOW must be an internal window. Return WINDOW."
348 (if (not (window-child window
))
349 (error "Window %s is not an internal window" window
)
352 (set-window-parameter window
'window-atom t
))
356 (defun window-atom-check-1 (window)
357 "Subroutine of `window-atom-check'."
359 (if (window-parameter window
'window-atom
)
361 (when (or (catch 'reset
364 (if (window-parameter window
'window-atom
)
365 (setq count
(1+ count
))
368 ;; count >= 1 must hold here. If there's no other
369 ;; window around dissolve this atomic window.
371 ;; Dissolve atomic window.
374 (set-window-parameter window
'window-atom nil
))
377 (unless (window-buffer window
)
378 (window-atom-check-1 (window-left-child window
))
379 (window-atom-check-1 (window-top-child window
))))
380 ;; Check right sibling
381 (window-atom-check-1 (window-right window
))))
383 (defun window-atom-check (&optional frame
)
384 "Check atomicity of all windows on FRAME.
385 FRAME defaults to the selected frame. If an atomic window is
386 wrongly configured, reset the atomicity of all its subwindows to
387 nil. An atomic window is wrongly configured if it has no
388 subwindows or one of its subwindows is not atomic."
389 (window-atom-check-1 (frame-root-window frame
)))
392 (defvar window-sides
'(left top right bottom
)
395 (defcustom window-sides-vertical nil
396 "If non-nil, left and right side windows are full height.
397 Otherwise, top and bottom side windows are full width."
402 (defcustom window-sides-slots
'(nil nil nil nil
)
403 "Maximum number of side window slots.
404 The value is a list of four elements specifying the number of
405 side window slots on \(in this order) the left, top, right and
406 bottom side of each frame. If an element is a number, this means
407 to display at most that many side windows on the corresponding
408 side. If an element is nil, this means there's no bound on the
409 number of slots on that side."
413 :value
(nil nil nil nil
)
416 :help-echo
"Maximum slots of left side window."
418 :format
"%[Left%] %v\n"
419 (const :tag
"Unlimited" :format
"%t" nil
)
420 (integer :tag
"Number" :value
2 :size
5))
423 :help-echo
"Maximum slots of top side window."
425 :format
"%[Top%] %v\n"
426 (const :tag
"Unlimited" :format
"%t" nil
)
427 (integer :tag
"Number" :value
3 :size
5))
430 :help-echo
"Maximum slots of right side window."
432 :format
"%[Right%] %v\n"
433 (const :tag
"Unlimited" :format
"%t" nil
)
434 (integer :tag
"Number" :value
2 :size
5))
437 :help-echo
"Maximum slots of bottom side window."
439 :format
"%[Bottom%] %v\n"
440 (const :tag
"Unlimited" :format
"%t" nil
)
441 (integer :tag
"Number" :value
3 :size
5)))
444 (defun window-side-check (&optional frame
)
445 "Check the window-side parameter of all windows on FRAME.
446 FRAME defaults to the selected frame. If the configuration is
447 invalid, reset all window-side parameters to nil.
449 A valid configuration has to preserve the following invariant:
451 - If a window has a non-nil window-side parameter, it must have a
452 parent window and the parent window's window-side parameter
453 must be either nil or the same as for window.
455 - If windows with non-nil window-side parameters exist, there
456 must be at most one window of each side and non-side with a
457 parent whose window-side parameter is nil and there must be no
458 leaf window whose window-side parameter is nil."
459 (let (normal none left top right bottom
460 side parent parent-side code
)
461 (when (or (catch 'reset
464 (setq side
(window-parameter window
'window-side
))
465 (setq parent
(window-parent window
))
467 (and parent
(window-parameter parent
'window-side
)))
468 ;; The following `cond' seems a bit tedious, but I'd
469 ;; rather stick to using just the stack.
472 (when (not (eq parent-side side
))
473 ;; A parent whose window-side is non-nil must
474 ;; have a child with the same window-side.
476 ;; Now check that there's more than one main window
477 ;; for any of none, left, top, right and bottom.
498 ((window-buffer window
)
499 ;; A leaf window without window-side parameter,
500 ;; record its existence.
504 ;; At least one non-side window exists, so there must
505 ;; be at least one side-window and no normal window.
506 (or (not (or left top right bottom
)) normal
)
507 ;; No non-side window exists, so there must be no side
509 (or left top right bottom
)))
512 (set-window-parameter window
'window-side nil
))
515 (defun window-check (&optional frame
)
516 "Check atomic and side windows on FRAME.
517 FRAME defaults to the selected frame."
518 (window-side-check frame
)
519 (window-atom-check frame
))
522 (defvar window-size-fixed nil
523 "Non-nil in a buffer means windows displaying the buffer are fixed-size.
524 If the value is `height', then only the window's height is fixed.
525 If the value is `width', then only the window's width is fixed.
526 Any other non-nil value fixes both the width and the height.
528 Emacs won't change the size of any window displaying that buffer,
529 unless it has no other choice \(like when deleting a neighboring
531 (make-variable-buffer-local 'window-size-fixed
)
533 (defsubst window-size-ignore
(window ignore
)
534 "Return non-nil if IGNORE says to ignore size restrictions for WINDOW."
535 (if (window-any-p ignore
) (eq window ignore
) ignore
))
537 (defun window-min-size (&optional window horizontal ignore
)
538 "Return the minimum number of lines of WINDOW.
539 WINDOW can be an arbitrary window and defaults to the selected
540 one. Optional argument HORIZONTAL non-nil means return the
541 minimum number of columns of WINDOW.
543 Optional argument IGNORE non-nil means ignore any restrictions
544 imposed by fixed size windows, `window-min-height' or
545 `window-min-width' settings. IGNORE equal `safe' means live
546 windows may get as small as `window-safe-min-height' lines and
547 `window-safe-min-width' columns. IGNORE a window means ignore
548 restrictions for that window only."
550 (window-normalize-any-window window
) horizontal ignore
))
552 (defun window-min-size-1 (window horizontal ignore
)
553 "Internal function of `window-min-size'."
554 (let ((sub (window-child window
)))
557 ;; WINDOW is an internal window.
558 (if (window-iso-combined-p sub horizontal
)
559 ;; The minimum size of an iso-combination is the sum of
560 ;; the minimum sizes of its subwindows.
563 (window-min-size-1 sub horizontal ignore
)))
564 (setq sub
(window-right sub
)))
565 ;; The minimum size of an ortho-combination is the maximum of
566 ;; the minimum sizes of its subwindows.
568 (setq value
(max value
569 (window-min-size-1 sub horizontal ignore
)))
570 (setq sub
(window-right sub
))))
572 (with-current-buffer (window-buffer window
)
574 ((and (not (window-size-ignore window ignore
))
575 (window-size-fixed-p window horizontal
))
576 ;; The minimum size of a fixed size window is its size.
577 (window-total-size window horizontal
))
578 ((or (eq ignore
'safe
) (eq ignore window
))
579 ;; If IGNORE equals `safe' or WINDOW return the safe values.
580 (if horizontal window-safe-min-width window-safe-min-height
))
582 ;; For the minimum width of a window take fringes and
583 ;; scroll-bars into account. This is questionable and should
584 ;; be removed as soon as we are able to split (and resize)
585 ;; windows such that the new (or resized) windows can get a
586 ;; size less than the user-specified `window-min-height' and
587 ;; `window-min-width'.
588 (let ((frame (window-frame window
))
589 (fringes (window-fringes window
))
590 (scroll-bars (window-scroll-bars window
)))
592 (+ window-safe-min-width
593 (ceiling (car fringes
) (frame-char-width frame
))
594 (ceiling (cadr fringes
) (frame-char-width frame
))
596 ((memq (nth 2 scroll-bars
) '(left right
))
598 ((memq (frame-parameter frame
'vertical-scroll-bars
)
600 (ceiling (or (frame-parameter frame
'scroll-bar-width
) 14)
603 (if (and (not (window-size-ignore window ignore
))
604 (numberp window-min-width
))
608 ;; For the minimum height of a window take any mode- or
609 ;; header-line into account.
610 (max (+ window-safe-min-height
611 (if header-line-format
1 0)
612 (if mode-line-format
1 0))
613 (if (and (not (window-size-ignore window ignore
))
614 (numberp window-min-height
))
618 (defun window-sizable (window delta
&optional horizontal ignore
)
619 "Return DELTA if DELTA lines can be added to WINDOW.
620 Optional argument HORIZONTAL non-nil means return DELTA if DELTA
621 columns can be added to WINDOW. A return value of zero means
622 that no lines (or columns) can be added to WINDOW.
624 This function looks only at WINDOW and its subwindows. The
625 function `window-resizable' looks at other windows as well.
627 DELTA positive means WINDOW shall be enlarged by DELTA lines or
628 columns. If WINDOW cannot be enlarged by DELTA lines or columns
629 return the maximum value in the range 0..DELTA by which WINDOW
632 DELTA negative means WINDOW shall be shrunk by -DELTA lines or
633 columns. If WINDOW cannot be shrunk by -DELTA lines or columns,
634 return the minimum value in the range DELTA..0 by which WINDOW
637 Optional argument IGNORE non-nil means ignore any restrictions
638 imposed by fixed size windows, `window-min-height' or
639 `window-min-width' settings. IGNORE equal `safe' means live
640 windows may get as small as `window-safe-min-height' lines and
641 `window-safe-min-width' columns. IGNORE any window means ignore
642 restrictions for that window only."
643 (setq window
(window-normalize-any-window window
))
646 (max (- (window-min-size window horizontal ignore
)
647 (window-total-size window horizontal
))
649 ((window-size-ignore window ignore
)
652 (if (window-size-fixed-p window horizontal
)
657 (defsubst window-sizable-p
(window delta
&optional horizontal ignore
)
658 "Return t if WINDOW can be resized by DELTA lines.
659 For the meaning of the arguments of this function see the
660 doc-string of `window-sizable'."
661 (setq window
(window-normalize-any-window window
))
663 (>= (window-sizable window delta horizontal ignore
) delta
)
664 (<= (window-sizable window delta horizontal ignore
) delta
)))
666 (defun window-size-fixed-1 (window horizontal
)
667 "Internal function for `window-size-fixed-p'."
668 (let ((sub (window-child window
)))
671 ;; WINDOW is an internal window.
672 (if (window-iso-combined-p sub horizontal
)
673 ;; An iso-combination is fixed size if all its subwindows
677 (unless (window-size-fixed-1 sub horizontal
)
678 ;; We found a non-fixed-size subwindow, so WINDOW's
679 ;; size is not fixed.
681 (setq sub
(window-right sub
)))
682 ;; All subwindows are fixed-size, so WINDOW's size is
685 ;; An ortho-combination is fixed-size if at least one of its
686 ;; subwindows is fixed-size.
688 (when (window-size-fixed-1 sub horizontal
)
689 ;; We found a fixed-size subwindow, so WINDOW's size is
692 (setq sub
(window-right sub
))))
693 ;; WINDOW is a live window.
694 (with-current-buffer (window-buffer window
)
696 (memq window-size-fixed
'(width t
))
697 (memq window-size-fixed
'(height t
))))))))
699 (defun window-size-fixed-p (&optional window horizontal
)
700 "Return non-nil if WINDOW's height is fixed.
701 WINDOW can be an arbitrary window and defaults to the selected
702 window. Optional argument HORIZONTAL non-nil means return
703 non-nil if WINDOW's width is fixed.
705 If this function returns nil, this does not necessarily mean that
706 WINDOW can be resized in the desired direction. The functions
707 `window-resizable' and `window-resizable-p' will tell that."
709 (window-normalize-any-window window
) horizontal
))
711 (defun window-min-delta-1 (window delta
&optional horizontal ignore trail noup
)
712 "Internal function for `window-min-delta'."
713 (if (not (window-parent window
))
714 ;; If we can't go up, return zero.
716 ;; Else try to find a non-fixed-size sibling of WINDOW.
717 (let* ((parent (window-parent window
))
718 (sub (window-child parent
)))
720 (if (window-iso-combined-p sub horizontal
)
721 ;; In an iso-combination throw DELTA if we find at least one
722 ;; subwindow and that subwindow is either not of fixed-size
723 ;; or we can ignore fixed-sizeness.
724 (let ((skip (eq trail
'after
)))
728 (setq skip
(eq trail
'before
)))
730 ((and (not (window-size-ignore window ignore
))
731 (window-size-fixed-p sub horizontal
)))
733 ;; We found a non-fixed-size subwindow.
734 (throw 'done delta
)))
735 (setq sub
(window-right sub
))))
736 ;; In an ortho-combination set DELTA to the minimum value by
737 ;; which other subwindows can shrink.
739 (unless (eq sub window
)
742 (- (window-total-size sub horizontal
)
743 (window-min-size sub horizontal ignore
)))))
744 (setq sub
(window-right sub
))))
747 (window-min-delta-1 parent delta horizontal ignore trail
))))))
749 (defun window-min-delta (&optional window horizontal ignore trail noup nodown
)
750 "Return number of lines by which WINDOW can be shrunk.
751 WINDOW can be an arbitrary window and defaults to the selected
752 window. Return zero if WINDOW cannot be shrunk.
754 Optional argument HORIZONTAL non-nil means return number of
755 columns by which WINDOW can be shrunk.
757 Optional argument IGNORE non-nil means ignore any restrictions
758 imposed by fixed size windows, `window-min-height' or
759 `window-min-width' settings. IGNORE a window means ignore
760 restrictions for that window only. IGNORE equal `safe' means
761 live windows may get as small as `window-safe-min-height' lines
762 and `window-safe-min-width' columns.
764 Optional argument TRAIL `before' means only windows to the left
765 of or above WINDOW can be enlarged. Optional argument TRAIL
766 `after' means only windows to the right of or below WINDOW can be
769 Optional argument NOUP non-nil means don't go up in the window
770 tree but try to enlarge windows within WINDOW's combination only.
772 Optional argument NODOWN non-nil means don't check whether WINDOW
773 itself \(and its subwindows) can be shrunk; check only whether at
774 least one other windows can be enlarged appropriately."
775 (setq window
(window-normalize-any-window window
))
776 (let ((size (window-total-size window horizontal
))
777 (minimum (window-min-size window horizontal ignore
)))
780 ;; If NODOWN is t, try to recover the entire size of WINDOW.
781 (window-min-delta-1 window size horizontal ignore trail noup
))
783 ;; If NODOWN is nil and WINDOW's size is already at its minimum,
784 ;; there's nothing to recover.
787 ;; Otherwise, try to recover whatever WINDOW is larger than its
790 window
(- size minimum
) horizontal ignore trail noup
)))))
792 (defun window-max-delta-1 (window delta
&optional horizontal ignore trail noup
)
793 "Internal function of `window-max-delta'."
794 (if (not (window-parent window
))
795 ;; Can't go up. Return DELTA.
797 (let* ((parent (window-parent window
))
798 (sub (window-child parent
)))
800 (if (window-iso-combined-p sub horizontal
)
801 ;; For an iso-combination calculate how much we can get from
803 (let ((skip (eq trail
'after
)))
807 (setq skip
(eq trail
'before
)))
812 (- (window-total-size sub horizontal
)
813 (window-min-size sub horizontal ignore
))))))
814 (setq sub
(window-right sub
))))
815 ;; For an ortho-combination throw DELTA when at least one
816 ;; subwindow is fixed-size.
818 (when (and (not (eq sub window
))
819 (not (window-size-ignore sub ignore
))
820 (window-size-fixed-p sub horizontal
))
821 (throw 'fixed delta
))
822 (setq sub
(window-right sub
))))
824 ;; When NOUP is nil, DELTA is all we can get.
826 ;; Else try with parent of WINDOW, passing the DELTA we
828 (window-max-delta-1 parent delta horizontal ignore trail
))))))
830 (defun window-max-delta (&optional window horizontal ignore trail noup nodown
)
831 "Return maximum number of lines WINDOW by which WINDOW can be enlarged.
832 WINDOW can be an arbitrary window and defaults to the selected
833 window. The return value is zero if WINDOW cannot be enlarged.
835 Optional argument HORIZONTAL non-nil means return maximum number
836 of columns by which WINDOW can be enlarged.
838 Optional argument IGNORE non-nil means ignore any restrictions
839 imposed by fixed size windows, `window-min-height' or
840 `window-min-width' settings. IGNORE a window means ignore
841 restrictions for that window only. IGNORE equal `safe' means
842 live windows may get as small as `window-safe-min-height' lines
843 and `window-safe-min-width' columns.
845 Optional argument TRAIL `before' means only windows to the left
846 of or below WINDOW can be shrunk. Optional argument TRAIL
847 `after' means only windows to the right of or above WINDOW can be
850 Optional argument NOUP non-nil means don't go up in the window
851 tree but try to obtain the entire space from windows within
852 WINDOW's combination.
854 Optional argument NODOWN non-nil means do not check whether
855 WINDOW itself \(and its subwindows) can be enlarged; check only
856 whether other windows can be shrunk appropriately."
857 (setq window
(window-normalize-any-window window
))
858 (if (and (not (window-size-ignore window ignore
))
859 (not nodown
) (window-size-fixed-p window horizontal
))
860 ;; With IGNORE and NOWDON nil return zero if WINDOW has fixed
863 ;; WINDOW has no fixed size.
864 (window-max-delta-1 window
0 horizontal ignore trail noup
)))
866 ;; Make NOUP also inhibit the min-size check.
867 (defun window-resizable (window delta
&optional horizontal ignore trail noup nodown
)
868 "Return DELTA if WINDOW can be resized vertically by DELTA lines.
869 Optional argument HORIZONTAL non-nil means return DELTA if WINDOW
870 can be resized horizontally by DELTA columns. A return value of
871 zero means that WINDOW is not resizable.
873 DELTA positive means WINDOW shall be enlarged by DELTA lines or
874 columns. If WINDOW cannot be enlarged by DELTA lines or columns
875 return the maximum value in the range 0..DELTA by which WINDOW
878 DELTA negative means WINDOW shall be shrunk by -DELTA lines or
879 columns. If WINDOW cannot be shrunk by -DELTA lines or columns,
880 return the minimum value in the range DELTA..0 that can be used
881 for shrinking WINDOW.
883 Optional argument IGNORE non-nil means ignore any restrictions
884 imposed by fixed size windows, `window-min-height' or
885 `window-min-width' settings. IGNORE a window means ignore
886 restrictions for that window only. IGNORE equal `safe' means
887 live windows may get as small as `window-safe-min-height' lines
888 and `window-safe-min-width' columns.
890 Optional argument TRAIL `before' means only windows to the left
891 of or below WINDOW can be shrunk. Optional argument TRAIL
892 `after' means only windows to the right of or above WINDOW can be
895 Optional argument NOUP non-nil means don't go up in the window
896 tree but try to distribute the space among the other windows
897 within WINDOW's combination.
899 Optional argument NODOWN non-nil means don't check whether WINDOW
900 and its subwindows can be resized."
901 (setq window
(window-normalize-any-window window
))
904 (max (- (window-min-delta window horizontal ignore trail noup nodown
))
907 (min (window-max-delta window horizontal ignore trail noup nodown
)
911 (defun window-resizable-p (window delta
&optional horizontal ignore trail noup nodown
)
912 "Return t if WINDOW can be resized vertically by DELTA lines.
913 For the meaning of the arguments of this function see the
914 doc-string of `window-resizable'."
915 (setq window
(window-normalize-any-window window
))
917 (>= (window-resizable window delta horizontal ignore trail noup nodown
)
919 (<= (window-resizable window delta horizontal ignore trail noup nodown
)
922 (defsubst window-total-height
(&optional window
)
923 "Return the total number of lines of WINDOW.
924 WINDOW can be any window and defaults to the selected one. The
925 return value includes WINDOW's mode line and header line, if any.
926 If WINDOW is internal the return value is the sum of the total
927 number of lines of WINDOW's child windows if these are vertically
928 combined and the height of WINDOW's first child otherwise.
930 Note: This function does not take into account the value of
931 `line-spacing' when calculating the number of lines in WINDOW."
932 (window-total-size window
))
934 ;; Eventually we should make `window-height' obsolete.
935 (defalias 'window-height
'window-total-height
)
937 ;; See discussion in bug#4543.
938 (defsubst window-full-height-p
(&optional window
)
939 "Return t if WINDOW is as high as the containing frame.
940 More precisely, return t if and only if the total height of
941 WINDOW equals the total height of the root window of WINDOW's
942 frame. WINDOW can be any window and defaults to the selected
944 (setq window
(window-normalize-any-window window
))
945 (= (window-total-size window
)
946 (window-total-size (frame-root-window window
))))
948 (defsubst window-total-width
(&optional window
)
949 "Return the total number of columns of WINDOW.
950 WINDOW can be any window and defaults to the selected one. The
951 return value includes any vertical dividers or scrollbars of
952 WINDOW. If WINDOW is internal, the return value is the sum of
953 the total number of columns of WINDOW's child windows if these
954 are horizontally combined and the width of WINDOW's first child
956 (window-total-size window t
))
958 (defsubst window-full-width-p
(&optional window
)
959 "Return t if WINDOW is as wide as the containing frame.
960 More precisely, return t if and only if the total width of WINDOW
961 equals the total width of the root window of WINDOW's frame.
962 WINDOW can be any window and defaults to the selected one."
963 (setq window
(window-normalize-any-window window
))
964 (= (window-total-size window t
)
965 (window-total-size (frame-root-window window
) t
)))
967 (defsubst window-body-height
(&optional window
)
968 "Return the number of lines of WINDOW's body.
969 WINDOW must be a live window and defaults to the selected one.
971 The return value does not include WINDOW's mode line and header
972 line, if any. If a line at the bottom of the window is only
973 partially visible, that line is included in the return value. If
974 you do not want to include a partially visible bottom line in the
975 return value, use `window-text-height' instead."
976 (window-body-size window
))
978 (defsubst window-body-width
(&optional window
)
979 "Return the number of columns of WINDOW's body.
980 WINDOW must be a live window and defaults to the selected one.
982 The return value does not include any vertical dividers or scroll
983 bars owned by WINDOW. On a window-system the return value does
984 not include the number of columns used for WINDOW's fringes or
985 display margins either."
986 (window-body-size window t
))
988 ;; Eventually we should make `window-height' obsolete.
989 (defalias 'window-width
'window-body-width
)
991 (defun window-current-scroll-bars (&optional window
)
992 "Return the current scroll bar settings for WINDOW.
993 WINDOW must be a live window and defaults to the selected one.
995 The return value is a cons cell (VERTICAL . HORIZONTAL) where
996 VERTICAL specifies the current location of the vertical scroll
997 bars (`left', `right', or nil), and HORIZONTAL specifies the
998 current location of the horizontal scroll bars (`top', `bottom',
1001 Unlike `window-scroll-bars', this function reports the scroll bar
1002 type actually used, once frame defaults and `scroll-bar-mode' are
1003 taken into account."
1004 (setq window
(window-normalize-live-window window
))
1005 (let ((vert (nth 2 (window-scroll-bars window
)))
1007 (when (or (eq vert t
) (eq hor t
))
1008 (let ((fcsb (frame-current-scroll-bars (window-frame window
))))
1010 (setq vert
(car fcsb
)))
1012 (setq hor
(cdr fcsb
)))))
1015 (defun walk-windows (proc &optional minibuf all-frames
)
1016 "Cycle through all live windows, calling PROC for each one.
1017 PROC must specify a function with a window as its sole argument.
1018 The optional arguments MINIBUF and ALL-FRAMES specify the set of
1019 windows to include in the walk.
1021 MINIBUF t means include the minibuffer window even if the
1022 minibuffer is not active. MINIBUF nil or omitted means include
1023 the minibuffer window only if the minibuffer is active. Any
1024 other value means do not include the minibuffer window even if
1025 the minibuffer is active.
1027 ALL-FRAMES nil or omitted means consider all windows on the
1028 selected frame, plus the minibuffer window if specified by the
1029 MINIBUF argument. If the minibuffer counts, consider all windows
1030 on all frames that share that minibuffer too. The following
1031 non-nil values of ALL-FRAMES have special meanings:
1033 - t means consider all windows on all existing frames.
1035 - `visible' means consider all windows on all visible frames on
1036 the current terminal.
1038 - 0 (the number zero) means consider all windows on all visible
1039 and iconified frames on the current terminal.
1041 - A frame means consider all windows on that frame only.
1043 Anything else means consider all windows on the selected frame
1046 This function changes neither the order of recently selected
1047 windows nor the buffer list."
1048 ;; If we start from the minibuffer window, don't fail to come
1050 (when (window-minibuffer-p (selected-window))
1052 ;; Make sure to not mess up the order of recently selected
1053 ;; windows. Use `save-selected-window' and `select-window'
1054 ;; with second argument non-nil for this purpose.
1055 (save-selected-window
1056 (when (framep all-frames
)
1057 (select-window (frame-first-window all-frames
) 'norecord
))
1058 (dolist (walk-windows-window (window-list-1 nil minibuf all-frames
))
1059 (funcall proc walk-windows-window
))))
1061 (defun window-point-1 (&optional window
)
1062 "Return value of WINDOW's point.
1063 WINDOW can be any live window and defaults to the selected one.
1065 This function is like `window-point' with one exception: If
1066 WINDOW is selected, it returns the value of `point' of WINDOW's
1067 buffer regardless of whether that buffer is current or not."
1068 (setq window
(window-normalize-live-window window
))
1069 (if (eq window
(selected-window))
1070 (with-current-buffer (window-buffer window
)
1072 (window-point window
)))
1074 (defun set-window-point-1 (window pos
)
1075 "Set value of WINDOW's point to POS.
1076 WINDOW can be any live window and defaults to the selected one.
1078 This function is like `set-window-point' with one exception: If
1079 WINDOW is selected, it moves `point' of WINDOW's buffer to POS
1080 regardless of whether that buffer is current or not."
1081 (setq window
(window-normalize-live-window window
))
1082 (if (eq window
(selected-window))
1083 (with-current-buffer (window-buffer window
)
1085 (set-window-point window pos
)))
1087 (defun window-in-direction-2 (window posn
&optional horizontal
)
1088 "Support function for `window-in-direction'."
1090 (let ((top (window-top-line window
)))
1093 (- posn top
(window-total-height window
))))
1094 (let ((left (window-left-column window
)))
1097 (- posn left
(window-total-width window
))))))
1099 (defun window-in-direction (direction &optional window ignore
)
1100 "Return window in DIRECTION as seen from WINDOW.
1101 DIRECTION must be one of `above', `below', `left' or `right'.
1102 WINDOW must be a live window and defaults to the selected one.
1103 IGNORE, when non-nil means a window can be returned even if its
1104 `no-other-window' parameter is non-nil."
1105 (setq window
(window-normalize-live-window window
))
1106 (unless (memq direction
'(above below left right
))
1107 (error "Wrong direction %s" direction
))
1108 (let* ((frame (window-frame window
))
1109 (hor (memq direction
'(left right
)))
1111 (window-left-column window
)
1112 (window-top-line window
)))
1113 (last (+ first
(if hor
1114 (window-total-width window
)
1115 (window-total-height window
))))
1116 (posn-cons (nth 6 (posn-at-point (window-point-1 window
) window
)))
1117 ;; The column / row value of `posn-at-point' can be nil for the
1118 ;; mini-window, guard against that.
1120 (+ (or (cdr posn-cons
) 1) (window-top-line window
))
1121 (+ (or (car posn-cons
) 1) (window-left-column window
))))
1124 ((eq direction
'below
) (frame-height frame
))
1125 ((eq direction
'right
) (frame-width frame
))
1127 (best-edge-2 best-edge
)
1128 (best-diff-2 (if hor
(frame-height frame
) (frame-width frame
)))
1129 best best-2 best-diff-2-new
)
1132 (let* ((w-top (window-top-line w
))
1133 (w-left (window-left-column w
)))
1136 ;; Ignore ourselves.
1137 (and (window-parameter w
'no-other-window
)
1138 ;; Ignore W unless IGNORE is non-nil.
1142 ((and (<= w-top posn
)
1143 (< posn
(+ w-top
(window-total-height w
))))
1144 ;; W is to the left or right of WINDOW and covers POSN.
1145 (when (or (and (eq direction
'left
)
1146 (<= w-left first
) (> w-left best-edge
))
1147 (and (eq direction
'right
)
1148 (>= w-left last
) (< w-left best-edge
)))
1149 (setq best-edge w-left
)
1151 ((and (or (and (eq direction
'left
)
1152 (<= (+ w-left
(window-total-width w
)) first
))
1153 (and (eq direction
'right
) (<= last w-left
)))
1154 ;; W is to the left or right of WINDOW but does not
1156 (setq best-diff-2-new
1157 (window-in-direction-2 w posn hor
))
1158 (or (< best-diff-2-new best-diff-2
)
1159 (and (= best-diff-2-new best-diff-2
)
1160 (if (eq direction
'left
)
1161 (> w-left best-edge-2
)
1162 (< w-left best-edge-2
)))))
1163 (setq best-edge-2 w-left
)
1164 (setq best-diff-2 best-diff-2-new
)
1168 ((and (<= w-left posn
)
1169 (< posn
(+ w-left
(window-total-width w
))))
1170 ;; W is above or below WINDOW and covers POSN.
1171 (when (or (and (eq direction
'above
)
1172 (<= w-top first
) (> w-top best-edge
))
1173 (and (eq direction
'below
)
1174 (>= w-top first
) (< w-top best-edge
)))
1175 (setq best-edge w-top
)
1177 ((and (or (and (eq direction
'above
)
1178 (<= (+ w-top
(window-total-height w
)) first
))
1179 (and (eq direction
'below
) (<= last w-top
)))
1180 ;; W is above or below WINDOW but does not cover POSN.
1181 (setq best-diff-2-new
1182 (window-in-direction-2 w posn hor
))
1183 (or (< best-diff-2-new best-diff-2
)
1184 (and (= best-diff-2-new best-diff-2
)
1185 (if (eq direction
'above
)
1186 (> w-top best-edge-2
)
1187 (< w-top best-edge-2
)))))
1188 (setq best-edge-2 w-top
)
1189 (setq best-diff-2 best-diff-2-new
)
1190 (setq best-2 w
)))))))
1191 (window-frame window
))
1194 (defun get-window-with-predicate (predicate &optional minibuf all-frames default
)
1195 "Return a live window satisfying PREDICATE.
1196 More precisely, cycle through all windows calling the function
1197 PREDICATE on each one of them with the window as its sole
1198 argument. Return the first window for which PREDICATE returns
1199 non-nil. Windows are scanned starting with the window following
1200 the selcted window. If no window satisfies PREDICATE, return
1203 MINIBUF t means include the minibuffer window even if the
1204 minibuffer is not active. MINIBUF nil or omitted means include
1205 the minibuffer window only if the minibuffer is active. Any
1206 other value means do not include the minibuffer window even if
1207 the minibuffer is active.
1209 ALL-FRAMES nil or omitted means consider all windows on the selected
1210 frame, plus the minibuffer window if specified by the MINIBUF
1211 argument. If the minibuffer counts, consider all windows on all
1212 frames that share that minibuffer too. The following non-nil
1213 values of ALL-FRAMES have special meanings:
1215 - t means consider all windows on all existing frames.
1217 - `visible' means consider all windows on all visible frames on
1218 the current terminal.
1220 - 0 (the number zero) means consider all windows on all visible
1221 and iconified frames on the current terminal.
1223 - A frame means consider all windows on that frame only.
1225 Anything else means consider all windows on the selected frame
1228 (dolist (window (window-list-1
1229 (next-window nil minibuf all-frames
)
1230 minibuf all-frames
))
1231 (when (funcall predicate window
)
1232 (throw 'found window
)))
1235 (defalias 'some-window
'get-window-with-predicate
)
1237 (defun get-lru-window (&optional all-frames dedicated
)
1238 "Return the least recently used window on frames specified by ALL-FRAMES.
1239 Return a full-width window if possible. A minibuffer window is
1240 never a candidate. A dedicated window is never a candidate
1241 unless DEDICATED is non-nil, so if all windows are dedicated, the
1242 value is nil. Avoid returning the selected window if possible.
1244 The following non-nil values of the optional argument ALL-FRAMES
1245 have special meanings:
1247 - t means consider all windows on all existing frames.
1249 - `visible' means consider all windows on all visible frames on
1250 the current terminal.
1252 - 0 (the number zero) means consider all windows on all visible
1253 and iconified frames on the current terminal.
1255 - A frame means consider all windows on that frame only.
1257 Any other value of ALL-FRAMES means consider all windows on the
1258 selected frame and no others."
1259 (let (best-window best-time second-best-window second-best-time time
)
1260 (dolist (window (window-list-1 nil
'nomini all-frames
))
1261 (when (or dedicated
(not (window-dedicated-p window
)))
1262 (setq time
(window-use-time window
))
1263 (if (or (eq window
(selected-window))
1264 (not (window-full-width-p window
)))
1265 (when (or (not second-best-time
) (< time second-best-time
))
1266 (setq second-best-time time
)
1267 (setq second-best-window window
))
1268 (when (or (not best-time
) (< time best-time
))
1269 (setq best-time time
)
1270 (setq best-window window
)))))
1271 (or best-window second-best-window
)))
1273 (defun get-mru-window (&optional all-frames
)
1274 "Return the most recently used window on frames specified by ALL-FRAMES.
1275 Do not return a minibuffer window.
1277 The following non-nil values of the optional argument ALL-FRAMES
1278 have special meanings:
1280 - t means consider all windows on all existing frames.
1282 - `visible' means consider all windows on all visible frames on
1283 the current terminal.
1285 - 0 (the number zero) means consider all windows on all visible
1286 and iconified frames on the current terminal.
1288 - A frame means consider all windows on that frame only.
1290 Any other value of ALL-FRAMES means consider all windows on the
1291 selected frame and no others."
1292 (let (best-window best-time time
)
1293 (dolist (window (window-list-1 nil
'nomini all-frames
))
1294 (setq time
(window-use-time window
))
1295 (when (or (not best-time
) (> time best-time
))
1296 (setq best-time time
)
1297 (setq best-window window
)))
1300 (defun get-largest-window (&optional all-frames dedicated
)
1301 "Return the largest window on frames specified by ALL-FRAMES.
1302 A minibuffer window is never a candidate. A dedicated window is
1303 never a candidate unless DEDICATED is non-nil, so if all windows
1304 are dedicated, the value is nil.
1306 The following non-nil values of the optional argument ALL-FRAMES
1307 have special meanings:
1309 - t means consider all windows on all existing frames.
1311 - `visible' means consider all windows on all visible frames on
1312 the current terminal.
1314 - 0 (the number zero) means consider all windows on all visible
1315 and iconified frames on the current terminal.
1317 - A frame means consider all windows on that frame only.
1319 Any other value of ALL-FRAMES means consider all windows on the
1320 selected frame and no others."
1323 (dolist (window (window-list-1 nil
'nomini all-frames
))
1324 (when (or dedicated
(not (window-dedicated-p window
)))
1325 (setq size
(* (window-total-size window
)
1326 (window-total-size window t
)))
1327 (when (> size best-size
)
1328 (setq best-size size
)
1329 (setq best-window window
))))
1332 (defun get-buffer-window-list (&optional buffer-or-name minibuf all-frames
)
1333 "Return list of all windows displaying BUFFER-OR-NAME, or nil if none.
1334 BUFFER-OR-NAME may be a buffer or the name of an existing buffer
1335 and defaults to the current buffer. Windows are scanned starting
1336 with the selected window.
1338 MINIBUF t means include the minibuffer window even if the
1339 minibuffer is not active. MINIBUF nil or omitted means include
1340 the minibuffer window only if the minibuffer is active. Any
1341 other value means do not include the minibuffer window even if
1342 the minibuffer is active.
1344 ALL-FRAMES nil or omitted means consider all windows on the
1345 selected frame, plus the minibuffer window if specified by the
1346 MINIBUF argument. If the minibuffer counts, consider all windows
1347 on all frames that share that minibuffer too. The following
1348 non-nil values of ALL-FRAMES have special meanings:
1350 - t means consider all windows on all existing frames.
1352 - `visible' means consider all windows on all visible frames on
1353 the current terminal.
1355 - 0 (the number zero) means consider all windows on all visible
1356 and iconified frames on the current terminal.
1358 - A frame means consider all windows on that frame only.
1360 Anything else means consider all windows on the selected frame
1362 (let ((buffer (window-normalize-buffer buffer-or-name
))
1364 (dolist (window (window-list-1 (selected-window) minibuf all-frames
))
1365 (when (eq (window-buffer window
) buffer
)
1366 (setq windows
(cons window windows
))))
1367 (nreverse windows
)))
1369 (defun minibuffer-window-active-p (window)
1370 "Return t if WINDOW is the currently active minibuffer window."
1371 (eq window
(active-minibuffer-window)))
1373 (defun count-windows (&optional minibuf
)
1374 "Return the number of live windows on the selected frame.
1375 The optional argument MINIBUF specifies whether the minibuffer
1376 window shall be counted. See `walk-windows' for the precise
1377 meaning of this argument."
1378 (length (window-list-1 nil minibuf
)))
1380 ;;; Resizing windows.
1381 (defun window--resize-reset (&optional frame horizontal
)
1382 "Reset resize values for all windows on FRAME.
1383 FRAME defaults to the selected frame.
1385 This function stores the current value of `window-total-size' applied
1386 with argument HORIZONTAL in the new total size of all windows on
1387 FRAME. It also resets the new normal size of each of these
1389 (window--resize-reset-1
1390 (frame-root-window (window-normalize-frame frame
)) horizontal
))
1392 (defun window--resize-reset-1 (window horizontal
)
1393 "Internal function of `window--resize-reset'."
1394 ;; Register old size in the new total size.
1395 (set-window-new-total window
(window-total-size window horizontal
))
1396 ;; Reset new normal size.
1397 (set-window-new-normal window
)
1398 (when (window-child window
)
1399 (window--resize-reset-1 (window-child window
) horizontal
))
1400 (when (window-right window
)
1401 (window--resize-reset-1 (window-right window
) horizontal
)))
1403 ;; The following routine is used to manually resize the minibuffer
1404 ;; window and is currently used, for example, by ispell.el.
1405 (defun window--resize-mini-window (window delta
)
1406 "Resize minibuffer window WINDOW by DELTA lines.
1407 If WINDOW cannot be resized by DELTA lines make it as large \(or
1408 as small) as possible but don't signal an error."
1409 (when (window-minibuffer-p window
)
1410 (let* ((frame (window-frame window
))
1411 (root (frame-root-window frame
))
1412 (height (window-total-size window
))
1414 (- (window-total-size root
)
1415 (window-min-size root
))))
1418 ((<= (+ height delta
) 0)
1419 (setq delta
(- (- height
1))))
1420 ((> delta min-delta
)
1421 (setq delta min-delta
)))
1424 (window--resize-reset frame
)
1425 ;; Ideally we should be able to resize just the last subwindow of
1426 ;; root here. See the comment in `resize-root-window-vertically'
1427 ;; for why we do not do that.
1428 (window--resize-this-window root
(- delta
) nil nil t
)
1429 (set-window-new-total window
(+ height delta
))
1430 ;; The following routine catches the case where we want to resize
1431 ;; a minibuffer-only frame.
1432 (resize-mini-window-internal window
))))
1434 (defun window-resize (window delta
&optional horizontal ignore
)
1435 "Resize WINDOW vertically by DELTA lines.
1436 WINDOW can be an arbitrary window and defaults to the selected
1437 one. An attempt to resize the root window of a frame will raise
1440 DELTA a positive number means WINDOW shall be enlarged by DELTA
1441 lines. DELTA negative means WINDOW shall be shrunk by -DELTA
1444 Optional argument HORIZONTAL non-nil means resize WINDOW
1445 horizontally by DELTA columns. In this case a positive DELTA
1446 means enlarge WINDOW by DELTA columns. DELTA negative means
1447 WINDOW shall be shrunk by -DELTA columns.
1449 Optional argument IGNORE non-nil means ignore any restrictions
1450 imposed by fixed size windows, `window-min-height' or
1451 `window-min-width' settings. IGNORE any window means ignore
1452 restrictions for that window only. IGNORE equal `safe' means
1453 live windows may get as small as `window-safe-min-height' lines
1454 and `window-safe-min-width' columns.
1456 This function resizes other windows proportionally and never
1457 deletes any windows. If you want to move only the low (right)
1458 edge of WINDOW consider using `adjust-window-trailing-edge'
1460 (setq window
(window-normalize-any-window window
))
1461 (let* ((frame (window-frame window
))
1464 ((eq window
(frame-root-window frame
))
1465 (error "Cannot resize the root window of a frame"))
1466 ((window-minibuffer-p window
)
1467 (window--resize-mini-window window delta
))
1468 ((window-resizable-p window delta horizontal ignore
)
1469 (window--resize-reset frame horizontal
)
1470 (window--resize-this-window window delta horizontal ignore t
)
1471 (if (and (not (window-splits window
))
1472 (window-iso-combined-p window horizontal
)
1473 (setq sibling
(or (window-right window
) (window-left window
)))
1474 (window-sizable-p sibling
(- delta
) horizontal ignore
))
1475 ;; If window-splits returns nil for WINDOW, WINDOW is part of
1476 ;; an iso-combination, and WINDOW's neighboring right or left
1477 ;; sibling can be resized as requested, resize that sibling.
1480 (window-total-size (window-parent window
) horizontal
))))
1481 (window--resize-this-window sibling
(- delta
) horizontal nil t
)
1482 (set-window-new-normal
1483 window
(+ (window-normal-size window horizontal
)
1485 (set-window-new-normal
1486 sibling
(- (window-normal-size sibling horizontal
)
1488 ;; Otherwise, resize all other windows in the same combination.
1489 (window--resize-siblings window delta horizontal ignore
))
1490 (window-resize-apply frame horizontal
))
1492 (error "Cannot resize window %s" window
)))))
1494 (defsubst window--resize-subwindows-skip-p
(window)
1495 "Return non-nil if WINDOW shall be skipped by resizing routines."
1496 (memq (window-new-normal window
) '(ignore stuck skip
)))
1498 (defun window--resize-subwindows-normal (parent horizontal window this-delta
&optional trail other-delta
)
1499 "Set the new normal height of subwindows of window PARENT.
1500 HORIZONTAL non-nil means set the new normal width of these
1501 windows. WINDOW specifies a subwindow of PARENT that has been
1502 resized by THIS-DELTA lines \(columns).
1504 Optional argument TRAIL either 'before or 'after means set values
1505 for windows before or after WINDOW only. Optional argument
1506 OTHER-DELTA a number specifies that this many lines \(columns)
1507 have been obtained from \(or returned to) an ancestor window of
1508 PARENT in order to resize WINDOW."
1509 (let* ((delta-normal
1510 (if (and (= (- this-delta
) (window-total-size window horizontal
))
1511 (zerop other-delta
))
1512 ;; When WINDOW gets deleted and we can return its entire
1513 ;; space to its siblings, use WINDOW's normal size as the
1515 (- (window-normal-size window horizontal
))
1516 ;; In any other case calculate the normal delta from the
1517 ;; relation of THIS-DELTA to the total size of PARENT.
1518 (/ (float this-delta
) (window-total-size parent horizontal
))))
1519 (sub (window-child parent
))
1521 (skip (eq trail
'after
)))
1523 ;; Set parent-normal to the sum of the normal sizes of all
1524 ;; subwindows of PARENT that shall be resized, excluding only WINDOW
1525 ;; and any windows specified by the optional TRAIL argument.
1529 (setq skip
(eq trail
'before
)))
1533 (+ parent-normal
(window-normal-size sub horizontal
)))))
1534 (setq sub
(window-right sub
)))
1536 ;; Set the new normal size of all subwindows of PARENT from what
1537 ;; they should have contributed for recovering THIS-DELTA lines
1539 (setq sub
(window-child parent
))
1540 (setq skip
(eq trail
'after
))
1544 (setq skip
(eq trail
'before
)))
1547 (let ((old-normal (window-normal-size sub horizontal
)))
1548 (set-window-new-normal
1549 sub
(min 1.0 ; Don't get larger than 1.
1551 (* (/ old-normal parent-normal
)
1553 ;; Don't drop below 0.
1555 (setq sub
(window-right sub
)))
1557 (when (numberp other-delta
)
1558 ;; Set the new normal size of windows from what they should have
1559 ;; contributed for recovering OTHER-DELTA lines (columns).
1560 (setq delta-normal
(/ (float (window-total-size parent horizontal
))
1561 (+ (window-total-size parent horizontal
)
1563 (setq sub
(window-child parent
))
1564 (setq skip
(eq trail
'after
))
1568 (setq skip
(eq trail
'before
)))
1571 (set-window-new-normal
1572 sub
(min 1.0 ; Don't get larger than 1.
1573 (max (* (window-new-normal sub
) delta-normal
)
1574 ;; Don't drop below 0.
1576 (setq sub
(window-right sub
))))
1578 ;; Set the new normal size of WINDOW to what is left by the sum of
1579 ;; the normal sizes of its siblings.
1580 (set-window-new-normal
1583 (setq sub
(window-child parent
))
1587 ((not (numberp (window-new-normal sub
)))
1588 (setq sum
(+ sum
(window-normal-size sub horizontal
))))
1590 (setq sum
(+ sum
(window-new-normal sub
)))))
1591 (setq sub
(window-right sub
)))
1592 ;; Don't get larger than 1 or smaller than 0.
1593 (min 1.0 (max (- 1.0 sum
) 0.0))))))
1595 (defun window--resize-subwindows (parent delta
&optional horizontal window ignore trail edge
)
1596 "Resize subwindows of window PARENT vertically by DELTA lines.
1597 PARENT must be a vertically combined internal window.
1599 Optional argument HORIZONTAL non-nil means resize subwindows of
1600 PARENT horizontally by DELTA columns. In this case PARENT must
1601 be a horizontally combined internal window.
1603 WINDOW, if specified, must denote a child window of PARENT that
1604 is resized by DELTA lines.
1606 Optional argument IGNORE non-nil means ignore any restrictions
1607 imposed by fixed size windows, `window-min-height' or
1608 `window-min-width' settings. IGNORE equal `safe' means live
1609 windows may get as small as `window-safe-min-height' lines and
1610 `window-safe-min-width' columns. IGNORE any window means ignore
1611 restrictions for that window only.
1613 Optional arguments TRAIL and EDGE, when non-nil, restrict the set
1614 of windows that shall be resized. If TRAIL equals `before',
1615 resize only windows on the left or above EDGE. If TRAIL equals
1616 `after', resize only windows on the right or below EDGE. Also,
1617 preferably only resize windows adjacent to EDGE.
1619 Return the symbol `normalized' if new normal sizes have been
1620 already set by this routine."
1621 (let* ((first (window-child parent
))
1623 (parent-total (+ (window-total-size parent horizontal
) delta
))
1624 best-window best-value
)
1626 (if (and edge
(memq trail
'(before after
))
1629 (while (and (window-right sub
)
1630 (or (and (eq trail
'before
)
1631 (not (window--resize-subwindows-skip-p
1632 (window-right sub
))))
1633 (and (eq trail
'after
)
1634 (window--resize-subwindows-skip-p sub
))))
1635 (setq sub
(window-right sub
)))
1638 (if (eq trail
'before
)
1639 (= (+ (window-left-column sub
)
1640 (window-total-size sub t
))
1642 (= (window-left-column sub
) edge
))
1643 (if (eq trail
'before
)
1644 (= (+ (window-top-line sub
)
1645 (window-total-size sub
))
1647 (= (window-top-line sub
) edge
)))
1648 (window-sizable-p sub delta horizontal ignore
))
1649 ;; Resize only windows adjacent to EDGE.
1651 (window--resize-this-window
1652 sub delta horizontal ignore t trail edge
)
1653 (if (and window
(eq (window-parent sub
) parent
))
1655 ;; Assign new normal sizes.
1656 (set-window-new-normal
1657 sub
(/ (float (window-new-total sub
)) parent-total
))
1658 (set-window-new-normal
1659 window
(- (window-normal-size window horizontal
)
1660 (- (window-new-normal sub
)
1661 (window-normal-size sub horizontal
)))))
1662 (window--resize-subwindows-normal
1663 parent horizontal sub
0 trail delta
))
1664 ;; Return 'normalized to notify `window--resize-siblings' that
1665 ;; normal sizes have been already set.
1667 ;; Resize all windows proportionally.
1671 ((or (window--resize-subwindows-skip-p sub
)
1672 ;; Ignore windows to skip and fixed-size subwindows - in
1673 ;; the latter case make it a window to skip.
1675 (window-size-fixed-p sub horizontal
)
1676 (set-window-new-normal sub
'ignore
))))
1678 ;; When shrinking store the number of lines/cols we can get
1679 ;; from this window here together with the total/normal size
1681 (set-window-new-normal
1684 ;; We used to call this with NODOWN t, "fixed" 2011-05-11.
1685 (window-min-delta sub horizontal ignore trail t
) ; t)
1686 (- (/ (float (window-total-size sub horizontal
))
1688 (window-normal-size sub horizontal
)))))
1690 ;; When enlarging store the total/normal size factor only
1691 (set-window-new-normal
1693 (- (/ (float (window-total-size sub horizontal
))
1695 (window-normal-size sub horizontal
)))))
1697 (setq sub
(window-right sub
)))
1701 ;; Shrink windows by delta.
1702 (setq best-window t
)
1703 (while (and best-window
(not (zerop delta
)))
1705 (setq best-window nil
)
1706 (setq best-value most-negative-fixnum
)
1708 (when (and (consp (window-new-normal sub
))
1709 (not (zerop (car (window-new-normal sub
))))
1710 (> (cdr (window-new-normal sub
)) best-value
))
1711 (setq best-window sub
)
1712 (setq best-value
(cdr (window-new-normal sub
))))
1714 (setq sub
(window-right sub
)))
1717 (setq delta
(1+ delta
)))
1718 (set-window-new-total best-window -
1 t
)
1719 (set-window-new-normal
1721 (if (= (car (window-new-normal best-window
)) 1)
1722 'skip
; We can't shrink best-window any further.
1723 (cons (1- (car (window-new-normal best-window
)))
1724 (- (/ (float (window-new-total best-window
))
1726 (window-normal-size best-window horizontal
)))))))
1728 ;; Enlarge windows by delta.
1729 (setq best-window t
)
1730 (while (and best-window
(not (zerop delta
)))
1732 (setq best-window nil
)
1733 (setq best-value most-positive-fixnum
)
1735 (when (and (numberp (window-new-normal sub
))
1736 (< (window-new-normal sub
) best-value
))
1737 (setq best-window sub
)
1738 (setq best-value
(window-new-normal sub
)))
1740 (setq sub
(window-right sub
)))
1743 (setq delta
(1- delta
)))
1744 (set-window-new-total best-window
1 t
)
1745 (set-window-new-normal
1747 (- (/ (float (window-new-total best-window
))
1749 (window-normal-size best-window horizontal
))))))
1754 (when (or (consp (window-new-normal sub
))
1755 (numberp (window-new-normal sub
)))
1756 ;; Reset new normal size fields so `window-resize-apply'
1757 ;; won't use them to apply new sizes.
1758 (set-window-new-normal sub
))
1760 (unless (eq (window-new-normal sub
) 'ignore
)
1761 ;; Resize this subwindow's subwindows (back-engineering
1762 ;; delta from sub's old and new total sizes).
1763 (let ((delta (- (window-new-total sub
)
1764 (window-total-size sub horizontal
))))
1765 (unless (and (zerop delta
) (not trail
))
1766 ;; For the TRAIL non-nil case we have to resize SUB
1767 ;; recursively even if it's size does not change.
1768 (window--resize-this-window
1769 sub delta horizontal ignore nil trail edge
))))
1770 (setq sub
(window-right sub
)))))))
1772 (defun window--resize-siblings (window delta
&optional horizontal ignore trail edge
)
1773 "Resize other windows when WINDOW is resized vertically by DELTA lines.
1774 Optional argument HORIZONTAL non-nil means resize other windows
1775 when WINDOW is resized horizontally by DELTA columns. WINDOW
1776 itself is not resized by this function.
1778 Optional argument IGNORE non-nil means ignore any restrictions
1779 imposed by fixed size windows, `window-min-height' or
1780 `window-min-width' settings. IGNORE equal `safe' means live
1781 windows may get as small as `window-safe-min-height' lines and
1782 `window-safe-min-width' columns. IGNORE any window means ignore
1783 restrictions for that window only.
1785 Optional arguments TRAIL and EDGE, when non-nil, refine the set
1786 of windows that shall be resized. If TRAIL equals `before',
1787 resize only windows on the left or above EDGE. If TRAIL equals
1788 `after', resize only windows on the right or below EDGE. Also,
1789 preferably only resize windows adjacent to EDGE."
1790 (when (window-parent window
)
1791 (let* ((parent (window-parent window
))
1792 (sub (window-child parent
)))
1793 (if (window-iso-combined-p sub horizontal
)
1794 ;; In an iso-combination try to extract DELTA from WINDOW's
1797 (skip (eq trail
'after
))
1798 this-delta other-delta
)
1799 ;; Decide which windows shall be left alone.
1803 ;; Make sure WINDOW is left alone when
1804 ;; resizing its siblings.
1805 (set-window-new-normal sub
'ignore
)
1806 (setq skip
(eq trail
'before
)))
1808 ;; Make sure this sibling is left alone when
1809 ;; resizing its siblings.
1810 (set-window-new-normal sub
'ignore
))
1811 ((or (window-size-ignore sub ignore
)
1812 (not (window-size-fixed-p sub horizontal
)))
1813 ;; Set this-delta to t to signal that we found a sibling
1814 ;; of WINDOW whose size is not fixed.
1815 (setq this-delta t
)))
1817 (setq sub
(window-right sub
)))
1819 ;; Set this-delta to what we can get from WINDOW's siblings.
1820 (if (= (- delta
) (window-total-size window horizontal
))
1821 ;; A deletion, presumably. We must handle this case
1822 ;; specially since `window-resizable' can't be used.
1824 ;; There's at least one resizable sibling we can
1825 ;; give WINDOW's size to.
1826 (setq this-delta delta
)
1827 ;; No resizable sibling exists.
1828 (setq this-delta
0))
1829 ;; Any other form of resizing.
1831 (window-resizable window delta horizontal ignore trail t
)))
1833 ;; Set other-delta to what we still have to get from
1834 ;; ancestor windows of parent.
1835 (setq other-delta
(- delta this-delta
))
1836 (unless (zerop other-delta
)
1837 ;; Unless we got everything from WINDOW's siblings, PARENT
1838 ;; must be resized by other-delta lines or columns.
1839 (set-window-new-total parent other-delta
'add
))
1841 (if (zerop this-delta
)
1842 ;; We haven't got anything from WINDOW's siblings but we
1843 ;; must update the normal sizes to respect other-delta.
1844 (window--resize-subwindows-normal
1845 parent horizontal window this-delta trail other-delta
)
1846 ;; We did get something from WINDOW's siblings which means
1847 ;; we have to resize their subwindows.
1848 (unless (eq (window--resize-subwindows
1849 parent
(- this-delta
) horizontal
1850 window ignore trail edge
)
1851 ;; If `window--resize-subwindows' returns
1852 ;; 'normalized, this means it has set the
1853 ;; normal sizes already.
1855 ;; Set the normal sizes.
1856 (window--resize-subwindows-normal
1857 parent horizontal window this-delta trail other-delta
))
1858 ;; Set DELTA to what we still have to get from ancestor
1860 (setq delta other-delta
)))
1862 ;; In an ortho-combination all siblings of WINDOW must be
1863 ;; resized by DELTA.
1864 (set-window-new-total parent delta
'add
)
1866 (unless (eq sub window
)
1867 (window--resize-this-window sub delta horizontal ignore t
))
1868 (setq sub
(window-right sub
))))
1870 (unless (zerop delta
)
1872 (window--resize-siblings
1873 parent delta horizontal ignore trail edge
)))))
1875 (defun window--resize-this-window (window delta
&optional horizontal ignore add trail edge
)
1876 "Resize WINDOW vertically by DELTA lines.
1877 Optional argument HORIZONTAL non-nil means resize WINDOW
1878 horizontally by DELTA columns.
1880 Optional argument IGNORE non-nil means ignore any restrictions
1881 imposed by fixed size windows, `window-min-height' or
1882 `window-min-width' settings. IGNORE equal `safe' means live
1883 windows may get as small as `window-safe-min-height' lines and
1884 `window-safe-min-width' columns. IGNORE any window means ignore
1885 restrictions for that window only.
1887 Optional argument ADD non-nil means add DELTA to the new total
1890 Optional arguments TRAIL and EDGE, when non-nil, refine the set
1891 of windows that shall be resized. If TRAIL equals `before',
1892 resize only windows on the left or above EDGE. If TRAIL equals
1893 `after', resize only windows on the right or below EDGE. Also,
1894 preferably only resize windows adjacent to EDGE.
1896 This function recursively resizes WINDOW's subwindows to fit the
1897 new size. Make sure that WINDOW is `window-resizable' before
1898 calling this function. Note that this function does not resize
1899 siblings of WINDOW or WINDOW's parent window. You have to
1900 eventually call `window-resize-apply' in order to make resizing
1901 actually take effect."
1903 ;; Add DELTA to the new total size of WINDOW.
1904 (set-window-new-total window delta t
))
1906 (let ((sub (window-child window
)))
1909 ((window-iso-combined-p sub horizontal
)
1910 ;; In an iso-combination resize subwindows according to their
1912 (window--resize-subwindows
1913 window delta horizontal nil ignore trail edge
))
1914 ;; In an ortho-combination resize each subwindow by DELTA.
1917 (window--resize-this-window
1918 sub delta horizontal ignore t trail edge
)
1919 (setq sub
(window-right sub
)))))))
1921 (defun window--resize-root-window (window delta horizontal ignore
)
1922 "Resize root window WINDOW vertically by DELTA lines.
1923 HORIZONTAL non-nil means resize root window WINDOW horizontally
1926 IGNORE non-nil means ignore any restrictions imposed by fixed
1927 size windows, `window-min-height' or `window-min-width' settings.
1929 This function is only called by the frame resizing routines. It
1930 resizes windows proportionally and never deletes any windows."
1931 (when (and (windowp window
) (numberp delta
)
1932 (window-sizable-p window delta horizontal ignore
))
1933 (window--resize-reset (window-frame window
) horizontal
)
1934 (window--resize-this-window window delta horizontal ignore t
)))
1936 (defun window--resize-root-window-vertically (window delta
)
1937 "Resize root window WINDOW vertically by DELTA lines.
1938 If DELTA is less than zero and we can't shrink WINDOW by DELTA
1939 lines, shrink it as much as possible. If DELTA is greater than
1940 zero, this function can resize fixed-size subwindows in order to
1941 recover the necessary lines.
1943 Return the number of lines that were recovered.
1945 This function is only called by the minibuffer window resizing
1946 routines. It resizes windows proportionally and never deletes
1948 (when (numberp delta
)
1952 (setq delta
(window-sizable window delta
)))
1954 (unless (window-sizable window delta
)
1957 (window--resize-reset (window-frame window
))
1958 ;; Ideally, we would resize just the last window in a combination
1959 ;; but that's not feasible for the following reason: If we grow
1960 ;; the minibuffer window and the last window cannot be shrunk any
1961 ;; more, we shrink another window instead. But if we then shrink
1962 ;; the minibuffer window again, the last window might get enlarged
1963 ;; and the state after shrinking is not the state before growing.
1964 ;; So, in practice, we'd need a history variable to record how to
1965 ;; proceed. But I'm not sure how such a variable could work with
1966 ;; repeated minibuffer window growing steps.
1967 (window--resize-this-window window delta nil ignore t
)
1970 (defun adjust-window-trailing-edge (window delta
&optional horizontal
)
1971 "Move WINDOW's bottom edge by DELTA lines.
1972 Optional argument HORIZONTAL non-nil means move WINDOW's right
1973 edge by DELTA columns. WINDOW defaults to the selected window.
1975 If DELTA is greater zero, then move the edge downwards or to the
1976 right. If DELTA is less than zero, move the edge upwards or to
1977 the left. If the edge can't be moved by DELTA lines or columns,
1978 move it as far as possible in the desired direction."
1979 (setq window
(window-normalize-any-window window
))
1980 (let ((frame (window-frame window
))
1982 left this-delta min-delta max-delta failed
)
1983 ;; Find the edge we want to move.
1984 (while (and (or (not (window-iso-combined-p right horizontal
))
1985 (not (window-right right
)))
1986 (setq right
(window-parent right
))))
1988 ((and (not right
) (not horizontal
) (not resize-mini-windows
)
1989 (eq (window-frame (minibuffer-window frame
)) frame
))
1990 (window--resize-mini-window (minibuffer-window frame
) (- delta
)))
1991 ((or (not (setq left right
)) (not (setq right
(window-right right
))))
1993 (error "No window on the right of this one")
1994 (error "No window below this one")))
1996 ;; Set LEFT to the first resizable window on the left. This step is
1997 ;; needed to handle fixed-size windows.
1998 (while (and left
(window-size-fixed-p left horizontal
))
2000 (or (window-left left
)
2002 (while (and (setq left
(window-parent left
))
2003 (not (window-iso-combined-p left horizontal
))))
2004 (window-left left
)))))
2007 (error "No resizable window on the left of this one")
2008 (error "No resizable window above this one")))
2010 ;; Set RIGHT to the first resizable window on the right. This step
2011 ;; is needed to handle fixed-size windows.
2012 (while (and right
(window-size-fixed-p right horizontal
))
2014 (or (window-right right
)
2016 (while (and (setq right
(window-parent right
))
2017 (not (window-iso-combined-p right horizontal
))))
2018 (window-right right
)))))
2021 (error "No resizable window on the right of this one")
2022 (error "No resizable window below this one")))
2024 ;; LEFT and RIGHT (which might be both internal windows) are now the
2025 ;; two windows we want to resize.
2028 (setq max-delta
(window-max-delta-1 left
0 horizontal nil
'after
))
2029 (setq min-delta
(window-min-delta-1 right
(- delta
) horizontal nil
'before
))
2030 (when (or (< max-delta delta
) (> min-delta
(- delta
)))
2031 ;; We can't get the whole DELTA - move as far as possible.
2032 (setq delta
(min max-delta
(- min-delta
))))
2033 (unless (zerop delta
)
2035 (window--resize-reset frame horizontal
)
2036 ;; Try to enlarge LEFT first.
2037 (setq this-delta
(window-resizable left delta horizontal
))
2038 (unless (zerop this-delta
)
2039 (window--resize-this-window
2040 left this-delta horizontal nil t
'before
2042 (+ (window-left-column left
) (window-total-size left t
))
2043 (+ (window-top-line left
) (window-total-size left
)))))
2044 ;; Shrink windows on right of LEFT.
2045 (window--resize-siblings
2046 left delta horizontal nil
'after
2048 (window-left-column right
)
2049 (window-top-line right
)))))
2051 (setq max-delta
(window-max-delta-1 right
0 horizontal nil
'before
))
2052 (setq min-delta
(window-min-delta-1 left delta horizontal nil
'after
))
2053 (when (or (< max-delta
(- delta
)) (> min-delta delta
))
2054 ;; We can't get the whole DELTA - move as far as possible.
2055 (setq delta
(max (- max-delta
) min-delta
)))
2056 (unless (zerop delta
)
2058 (window--resize-reset frame horizontal
)
2059 ;; Try to enlarge RIGHT.
2060 (setq this-delta
(window-resizable right
(- delta
) horizontal
))
2061 (unless (zerop this-delta
)
2062 (window--resize-this-window
2063 right this-delta horizontal nil t
'after
2065 (window-left-column right
)
2066 (window-top-line right
))))
2067 ;; Shrink windows on left of RIGHT.
2068 (window--resize-siblings
2069 right
(- delta
) horizontal nil
'before
2071 (+ (window-left-column left
) (window-total-size left t
))
2072 (+ (window-top-line left
) (window-total-size left
)))))))
2073 (unless (zerop delta
)
2074 ;; Don't report an error in the standard case.
2075 (unless (window-resize-apply frame horizontal
)
2076 ;; But do report an error if applying the changes fails.
2077 (error "Failed adjusting window %s" window
)))))))
2079 (defun enlarge-window (delta &optional horizontal
)
2080 "Make selected window DELTA lines taller.
2081 Interactively, if no argument is given, make the selected window
2082 one line taller. If optional argument HORIZONTAL is non-nil,
2083 make selected window wider by DELTA columns. If DELTA is
2084 negative, shrink selected window by -DELTA lines or columns.
2089 ((window-size-fixed-p nil horizontal
)
2090 (error "Selected window has fixed size"))
2091 ((window-resizable-p nil delta horizontal
)
2092 (window-resize nil delta horizontal
))
2096 (window-max-delta nil horizontal
)
2097 (- (window-min-delta nil horizontal
)))
2100 (defun shrink-window (delta &optional horizontal
)
2101 "Make selected window DELTA lines smaller.
2102 Interactively, if no argument is given, make the selected window
2103 one line smaller. If optional argument HORIZONTAL is non-nil,
2104 make selected window narrower by DELTA columns. If DELTA is
2105 negative, enlarge selected window by -DELTA lines or columns.
2110 ((window-size-fixed-p nil horizontal
)
2111 (error "Selected window has fixed size"))
2112 ((window-resizable-p nil
(- delta
) horizontal
)
2113 (window-resize nil
(- delta
) horizontal
))
2117 (- (window-min-delta nil horizontal
))
2118 (window-max-delta nil horizontal
))
2121 (defun maximize-window (&optional window
)
2123 Make WINDOW as large as possible without deleting any windows.
2124 WINDOW can be any window and defaults to the selected window."
2126 (setq window
(window-normalize-any-window window
))
2127 (window-resize window
(window-max-delta window
))
2128 (window-resize window
(window-max-delta window t
) t
))
2130 (defun minimize-window (&optional window
)
2132 Make WINDOW as small as possible without deleting any windows.
2133 WINDOW can be any window and defaults to the selected window."
2135 (setq window
(window-normalize-any-window window
))
2136 (window-resize window
(- (window-min-delta window
)))
2137 (window-resize window
(- (window-min-delta window t
)) t
))
2139 (defsubst frame-root-window-p
(window)
2140 "Return non-nil if WINDOW is the root window of its frame."
2141 (eq window
(frame-root-window window
)))
2143 (defun window-tree-1 (window &optional next
)
2144 "Return window tree rooted at WINDOW.
2145 Optional argument NEXT non-nil means include windows right
2146 siblings in the return value.
2148 See the documentation of `window-tree' for a description of the
2155 ((window-top-child window
)
2156 (cons t
(cons (window-edges window
)
2157 (window-tree-1 (window-top-child window
) t
))))
2158 ((window-left-child window
)
2159 (cons nil
(cons (window-edges window
)
2160 (window-tree-1 (window-left-child window
) t
))))
2163 (setq window
(when next
(window-next-sibling window
))))
2166 (defun window-tree (&optional frame
)
2167 "Return the window tree of frame FRAME.
2168 FRAME must be a live frame and defaults to the selected frame.
2169 The return value is a list of the form (ROOT MINI), where ROOT
2170 represents the window tree of the frame's root window, and MINI
2171 is the frame's minibuffer window.
2173 If the root window is not split, ROOT is the root window itself.
2174 Otherwise, ROOT is a list (DIR EDGES W1 W2 ...) where DIR is nil
2175 for a horizontal split, and t for a vertical split. EDGES gives
2176 the combined size and position of the subwindows in the split,
2177 and the rest of the elements are the subwindows in the split.
2178 Each of the subwindows may again be a window or a list
2179 representing a window split, and so on. EDGES is a list \(LEFT
2180 TOP RIGHT BOTTOM) as returned by `window-edges'."
2181 (setq frame
(window-normalize-frame frame
))
2182 (window-tree-1 (frame-root-window frame
) t
))
2184 (defun other-window (count &optional all-frames
)
2185 "Select another window in cyclic ordering of windows.
2186 COUNT specifies the number of windows to skip, starting with the
2187 selected window, before making the selection. If COUNT is
2188 positive, skip COUNT windows forwards. If COUNT is negative,
2189 skip -COUNT windows backwards. COUNT zero means do not skip any
2190 window, so select the selected window. In an interactive call,
2191 COUNT is the numeric prefix argument. Return nil.
2193 If the `other-window' parameter of WINDOW is a function and
2194 `ignore-window-parameters' is nil, call that function with the
2195 arguments COUNT and ALL-FRAMES.
2197 This function does not select a window whose `no-other-window'
2198 window parameter is non-nil.
2200 This function uses `next-window' for finding the window to
2201 select. The argument ALL-FRAMES has the same meaning as in
2202 `next-window', but the MINIBUF argument of `next-window' is
2203 always effectively nil."
2205 (let* ((window (selected-window))
2206 (function (and (not ignore-window-parameters
)
2207 (window-parameter window
'other-window
)))
2208 old-window old-count
)
2209 (if (functionp function
)
2210 (funcall function count all-frames
)
2211 ;; `next-window' and `previous-window' may return a window we are
2212 ;; not allowed to select. Hence we need an exit strategy in case
2213 ;; all windows are non-selectable.
2216 (setq window
(next-window window nil all-frames
))
2218 ((eq window old-window
)
2219 (when (= count old-count
)
2220 ;; Keep out of infinite loops. When COUNT has not changed
2221 ;; since we last looked at `window' we're probably in one.
2223 ((window-parameter window
'no-other-window
)
2225 ;; The first non-selectable window `next-window' got us:
2226 ;; Remember it and the current value of COUNT.
2227 (setq old-window window
)
2228 (setq old-count count
)))
2230 (setq count
(1- count
)))))
2232 (setq window
(previous-window window nil all-frames
))
2234 ((eq window old-window
)
2235 (when (= count old-count
)
2236 ;; Keep out of infinite loops. When COUNT has not changed
2237 ;; since we last looked at `window' we're probably in one.
2239 ((window-parameter window
'no-other-window
)
2241 ;; The first non-selectable window `previous-window' got
2242 ;; us: Remember it and the current value of COUNT.
2243 (setq old-window window
)
2244 (setq old-count count
)))
2246 (setq count
(1+ count
)))))
2248 (select-window window
)
2249 ;; Always return nil.
2252 ;; This should probably return non-nil when the selected window is part
2253 ;; of an atomic window whose root is the frame's root window.
2254 (defun one-window-p (&optional nomini all-frames
)
2255 "Return non-nil if the selected window is the only window.
2256 Optional arg NOMINI non-nil means don't count the minibuffer
2257 even if it is active. Otherwise, the minibuffer is counted
2260 Optional argument ALL-FRAMES specifies the set of frames to
2261 consider, see also `next-window'. ALL-FRAMES nil or omitted
2262 means consider windows on the selected frame only, plus the
2263 minibuffer window if specified by the NOMINI argument. If the
2264 minibuffer counts, consider all windows on all frames that share
2265 that minibuffer too. The remaining non-nil values of ALL-FRAMES
2266 with a special meaning are:
2268 - t means consider all windows on all existing frames.
2270 - `visible' means consider all windows on all visible frames on
2271 the current terminal.
2273 - 0 (the number zero) means consider all windows on all visible
2274 and iconified frames on the current terminal.
2276 - A frame means consider all windows on that frame only.
2278 Anything else means consider all windows on the selected frame
2280 (let ((base-window (selected-window)))
2281 (if (and nomini
(eq base-window
(minibuffer-window)))
2282 (setq base-window
(next-window base-window
)))
2284 (next-window base-window
(if nomini
'arg
) all-frames
))))
2286 ;;; Deleting windows.
2287 (defun window-deletable-p (&optional window
)
2288 "Return t if WINDOW can be safely deleted from its frame.
2289 Return `frame' if deleting WINDOW should also delete its
2291 (setq window
(window-normalize-any-window window
))
2293 (unless ignore-window-parameters
2294 ;; Handle atomicity.
2295 (when (window-parameter window
'window-atom
)
2296 (setq window
(window-atom-root window
))))
2298 (let* ((parent (window-parent window
))
2299 (frame (window-frame window
))
2300 (buffer (window-buffer window
)))
2302 ((frame-root-window-p window
)
2303 ;; WINDOW's frame can be deleted only if there are other frames
2304 ;; on the same terminal.
2305 (unless (eq frame
(next-frame frame
0))
2307 ((or ignore-window-parameters
2308 (not (eq (window-parameter window
'window-side
) 'none
))
2309 (and parent
(eq (window-parameter parent
'window-side
) 'none
)))
2310 ;; WINDOW can be deleted unless it is the main window of its
2314 (defun window-or-subwindow-p (subwindow window
)
2315 "Return t if SUBWINDOW is either WINDOW or a subwindow of WINDOW."
2316 (or (eq subwindow window
)
2317 (let ((parent (window-parent subwindow
)))
2320 (if (eq parent window
)
2322 (setq parent
(window-parent parent
))))))))
2324 (defun delete-window (&optional window
)
2326 WINDOW can be an arbitrary window and defaults to the selected
2329 If the variable `ignore-window-parameters' is non-nil or the
2330 `delete-window' parameter of WINDOW equals t, do not process any
2331 parameters of WINDOW. Otherwise, if the `delete-window'
2332 parameter of WINDOW specifies a function, call that function with
2333 WINDOW as its sole argument and return the value returned by that
2336 Otherwise, if WINDOW is part of an atomic window, call
2337 `delete-window' with the root of the atomic window as its
2338 argument. If WINDOW is the only window on its frame or the last
2339 non-side window, signal an error."
2341 (setq window
(window-normalize-any-window window
))
2342 (let* ((frame (window-frame window
))
2343 (function (window-parameter window
'delete-window
))
2344 (parent (window-parent window
))
2346 (window-check frame
)
2348 ;; Handle window parameters.
2350 ;; Ignore window parameters if `ignore-window-parameters' tells
2351 ;; us so or `delete-window' equals t.
2352 ((or ignore-window-parameters
(eq function t
)))
2353 ((functionp function
)
2354 ;; The `delete-window' parameter specifies the function to call.
2355 ;; If that function is `ignore' nothing is done. It's up to the
2356 ;; function called here to avoid infinite recursion.
2357 (throw 'done
(funcall function window
)))
2358 ((and (window-parameter window
'window-atom
)
2359 (setq atom-root
(window-atom-root window
))
2360 (not (eq atom-root window
)))
2361 (throw 'done
(delete-window atom-root
)))
2362 ((and (eq (window-parameter window
'window-side
) 'none
)
2364 (not (eq (window-parameter parent
'window-side
) 'none
))))
2365 (error "Attempt to delete last non-side window"))
2367 (error "Attempt to delete minibuffer or sole ordinary window")))
2369 (let* ((horizontal (window-left-child parent
))
2370 (size (window-total-size window horizontal
))
2372 (window-or-subwindow-p (frame-selected-window frame
) window
))
2373 ;; Emacs 23 preferably gives WINDOW's space to its left
2375 (sibling (or (window-left window
) (window-right window
))))
2376 (window--resize-reset frame horizontal
)
2378 ((and (not (window-splits window
))
2379 sibling
(window-sizable-p sibling size
))
2380 ;; Resize WINDOW's sibling.
2381 (window--resize-this-window sibling size horizontal nil t
)
2382 (set-window-new-normal
2383 sibling
(+ (window-normal-size sibling horizontal
)
2384 (window-normal-size window horizontal
))))
2385 ((window-resizable-p window
(- size
) horizontal nil nil nil t
)
2386 ;; Can do without resizing fixed-size windows.
2387 (window--resize-siblings window
(- size
) horizontal
))
2389 ;; Can't do without resizing fixed-size windows.
2390 (window--resize-siblings window
(- size
) horizontal t
)))
2391 ;; Actually delete WINDOW.
2392 (delete-window-internal window
)
2393 (when (and frame-selected
2395 (frame-selected-window frame
) 'no-other-window
))
2396 ;; `delete-window-internal' has selected a window that should
2397 ;; not be selected, fix this here.
2398 (other-window -
1 frame
))
2399 (run-window-configuration-change-hook frame
)
2400 (window-check frame
)
2401 ;; Always return nil.
2404 (defun delete-other-windows (&optional window
)
2405 "Make WINDOW fill its frame.
2406 WINDOW may be any window and defaults to the selected one.
2409 If the variable `ignore-window-parameters' is non-nil or the
2410 `delete-other-windows' parameter of WINDOW equals t, do not
2411 process any parameters of WINDOW. Otherwise, if the
2412 `delete-other-windows' parameter of WINDOW specifies a function,
2413 call that function with WINDOW as its sole argument and return
2414 the value returned by that function.
2416 Otherwise, if WINDOW is part of an atomic window, call this
2417 function with the root of the atomic window as its argument. If
2418 WINDOW is a non-side window, make WINDOW the only non-side window
2419 on the frame. Side windows are not deleted. If WINDOW is a side
2420 window signal an error."
2422 (setq window
(window-normalize-any-window window
))
2423 (let* ((frame (window-frame window
))
2424 (function (window-parameter window
'delete-other-windows
))
2425 (window-side (window-parameter window
'window-side
))
2426 atom-root side-main
)
2427 (window-check frame
)
2430 ;; Ignore window parameters if `ignore-window-parameters' is t or
2431 ;; `delete-other-windows' is t.
2432 ((or ignore-window-parameters
(eq function t
)))
2433 ((functionp function
)
2434 ;; The `delete-other-windows' parameter specifies the function
2435 ;; to call. If the function is `ignore' no windows are deleted.
2436 ;; It's up to the function called to avoid infinite recursion.
2437 (throw 'done
(funcall function window
)))
2438 ((and (window-parameter window
'window-atom
)
2439 (setq atom-root
(window-atom-root window
))
2440 (not (eq atom-root window
)))
2441 (throw 'done
(delete-other-windows atom-root
)))
2442 ((eq window-side
'none
)
2443 ;; Set side-main to the major non-side window.
2444 (setq side-main
(window-with-parameter 'window-side
'none nil t
)))
2445 ((memq window-side window-sides
)
2446 (error "Cannot make side window the only window")))
2447 ;; If WINDOW is the main non-side window, do nothing.
2448 (unless (eq window side-main
)
2449 (delete-other-windows-internal window side-main
)
2450 (run-window-configuration-change-hook frame
)
2451 (window-check frame
))
2452 ;; Always return nil.
2455 (defun delete-other-windows-vertically (&optional window
)
2456 "Delete the windows in the same column with WINDOW, but not WINDOW itself.
2457 This may be a useful alternative binding for \\[delete-other-windows]
2458 if you often split windows horizontally."
2460 (let* ((window (or window
(selected-window)))
2461 (edges (window-edges window
))
2463 (while (not (eq (setq w
(next-window w
1)) window
))
2464 (let ((e (window-edges w
)))
2465 (when (and (= (car e
) (car edges
))
2466 (= (caddr e
) (caddr edges
)))
2468 (mapc 'delete-window delenda
)))
2470 ;;; Windows and buffers.
2472 ;; `prev-buffers' and `next-buffers' are two reserved window slots used
2473 ;; for (1) determining which buffer to show in the window when its
2474 ;; buffer shall be buried or killed and (2) which buffer to show for
2475 ;; `switch-to-prev-buffer' and `switch-to-next-buffer'.
2477 ;; `prev-buffers' consists of <buffer, window-start, window-point>
2478 ;; triples. The entries on this list are ordered by the time their
2479 ;; buffer has been removed from the window, the most recently removed
2480 ;; buffer's entry being first. The window-start and window-point
2481 ;; components are `window-start' and `window-point' at the time the
2482 ;; buffer was removed from the window which implies that the entry must
2483 ;; be added when `set-window-buffer' removes the buffer from the window.
2485 ;; `next-buffers' is the list of buffers that have been replaced
2486 ;; recently by `switch-to-prev-buffer'. These buffers are the least
2487 ;; preferred candidates of `switch-to-prev-buffer' and the preferred
2488 ;; candidates of `switch-to-next-buffer' to switch to. This list is
2489 ;; reset to nil by any action changing the window's buffer with the
2490 ;; exception of `switch-to-prev-buffer' and `switch-to-next-buffer'.
2491 ;; `switch-to-prev-buffer' pushes the buffer it just replaced on it,
2492 ;; `switch-to-next-buffer' pops the last pushed buffer from it.
2494 ;; Both `prev-buffers' and `next-buffers' may reference killed buffers
2495 ;; if such a buffer was killed while the window was hidden within a
2496 ;; window configuration. Such killed buffers get removed whenever
2497 ;; `switch-to-prev-buffer' or `switch-to-next-buffer' encounter them.
2499 ;; The following function is called by `set-window-buffer' _before_ it
2500 ;; replaces the buffer of the argument window with the new buffer.
2501 (defun record-window-buffer (&optional window
)
2502 "Record WINDOW's buffer.
2503 WINDOW must be a live window and defaults to the selected one."
2504 (let* ((window (window-normalize-live-window window
))
2505 (buffer (window-buffer window
))
2506 (entry (assq buffer
(window-prev-buffers window
))))
2507 ;; Reset WINDOW's next buffers. If needed, they are resurrected by
2508 ;; `switch-to-prev-buffer' and `switch-to-next-buffer'.
2509 (set-window-next-buffers window nil
)
2512 ;; Remove all entries for BUFFER from WINDOW's previous buffers.
2513 (set-window-prev-buffers
2514 window
(assq-delete-all buffer
(window-prev-buffers window
))))
2516 ;; Don't record insignificant buffers.
2517 (unless (eq (aref (buffer-name buffer
) 0) ?\s
)
2518 ;; Add an entry for buffer to WINDOW's previous buffers.
2519 (with-current-buffer buffer
2520 (let ((start (window-start window
))
2521 (point (window-point-1 window
)))
2525 ;; We have an entry, update marker positions.
2526 (list (set-marker (nth 1 entry
) start
)
2527 (set-marker (nth 2 entry
) point
))
2528 ;; Make new markers.
2529 (list (copy-marker start
)
2530 (copy-marker point
)))))
2532 (set-window-prev-buffers
2533 window
(cons entry
(window-prev-buffers window
))))))))
2535 (defun unrecord-window-buffer (&optional window buffer
)
2536 "Unrecord BUFFER in WINDOW.
2537 WINDOW must be a live window and defaults to the selected one.
2538 BUFFER must be a live buffer and defaults to the buffer of
2540 (let* ((window (window-normalize-live-window window
))
2541 (buffer (or buffer
(window-buffer window
))))
2542 (set-window-prev-buffers
2543 window
(assq-delete-all buffer
(window-prev-buffers window
)))
2544 (set-window-next-buffers
2545 window
(delq buffer
(window-next-buffers window
)))))
2547 (defun set-window-buffer-start-and-point (window buffer
&optional start point
)
2548 "Set WINDOW's buffer to BUFFER.
2549 Optional argument START non-nil means set WINDOW's start position
2550 to START. Optional argument POINT non-nil means set WINDOW's
2551 point to POINT. If WINDOW is selected this also sets BUFFER's
2552 `point' to POINT. If WINDOW is selected and the buffer it showed
2553 before was current this also makes BUFFER the current buffer."
2554 (let ((selected (eq window
(selected-window)))
2555 (current (eq (window-buffer window
) (current-buffer))))
2556 (set-window-buffer window buffer
)
2557 (when (and selected current
)
2558 (set-buffer buffer
))
2560 ;; Don't force window-start here (even if POINT is nil).
2561 (set-window-start window start t
))
2563 (set-window-point-1 window point
))))
2565 (defun switch-to-prev-buffer (&optional window bury-or-kill
)
2566 "In WINDOW switch to previous buffer.
2567 WINDOW must be a live window and defaults to the selected one.
2569 Optional argument BURY-OR-KILL non-nil means the buffer currently
2570 shown in WINDOW is about to be buried or killed and consequently
2571 shall not be switched to in future invocations of this command."
2573 (let* ((window (window-normalize-live-window window
))
2574 (old-buffer (window-buffer window
))
2575 ;; Save this since it's destroyed by `set-window-buffer'.
2576 (next-buffers (window-next-buffers window
))
2577 entry new-buffer killed-buffers visible
)
2578 (when (window-dedicated-p window
)
2579 (error "Window %s is dedicated to buffer %s" window old-buffer
))
2582 ;; Scan WINDOW's previous buffers first, skipping entries of next
2584 (dolist (entry (window-prev-buffers window
))
2585 (when (and (setq new-buffer
(car entry
))
2586 (or (buffer-live-p new-buffer
)
2587 (not (setq killed-buffers
2588 (cons new-buffer killed-buffers
))))
2589 (not (eq new-buffer old-buffer
))
2591 (not (memq new-buffer next-buffers
))))
2592 (set-window-buffer-start-and-point
2593 window new-buffer
(nth 1 entry
) (nth 2 entry
))
2595 ;; Scan reverted buffer list of WINDOW's frame next, skipping
2596 ;; entries of next buffers. Note that when we bury or kill a
2597 ;; buffer we don't reverse the global buffer list to avoid showing
2598 ;; a buried buffer instead. Otherwise, we must reverse the global
2599 ;; buffer list in order to make sure that switching to the
2600 ;; previous/next buffer traverse it in opposite directions.
2601 (dolist (buffer (if bury-or-kill
2602 (buffer-list (window-frame window
))
2603 (nreverse (buffer-list (window-frame window
)))))
2604 (when (and (buffer-live-p buffer
)
2605 (not (eq buffer old-buffer
))
2606 (not (eq (aref (buffer-name buffer
) 0) ?\s
))
2607 (or bury-or-kill
(not (memq buffer next-buffers
))))
2608 (if (get-buffer-window buffer
)
2609 ;; Try to avoid showing a buffer visible in some other window.
2610 (setq visible buffer
)
2611 (setq new-buffer buffer
)
2612 (set-window-buffer-start-and-point window new-buffer
)
2614 (unless bury-or-kill
2615 ;; Scan reverted next buffers last (must not use nreverse
2617 (dolist (buffer (reverse next-buffers
))
2618 ;; Actually, buffer _must_ be live here since otherwise it
2619 ;; would have been caught in the scan of previous buffers.
2620 (when (and (or (buffer-live-p buffer
)
2621 (not (setq killed-buffers
2622 (cons buffer killed-buffers
))))
2623 (not (eq buffer old-buffer
))
2624 (setq entry
(assq buffer
(window-prev-buffers window
))))
2625 (setq new-buffer buffer
)
2626 (set-window-buffer-start-and-point
2627 window new-buffer
(nth 1 entry
) (nth 2 entry
))
2630 ;; Show a buffer visible in another window.
2632 (setq new-buffer visible
)
2633 (set-window-buffer-start-and-point window new-buffer
)))
2636 ;; Remove `old-buffer' from WINDOW's previous and (restored list
2637 ;; of) next buffers.
2639 (set-window-prev-buffers
2640 window
(assq-delete-all old-buffer
(window-prev-buffers window
)))
2641 (set-window-next-buffers window
(delq old-buffer next-buffers
)))
2642 ;; Move `old-buffer' to head of WINDOW's restored list of next
2644 (set-window-next-buffers
2645 window
(cons old-buffer
(delq old-buffer next-buffers
))))
2647 ;; Remove killed buffers from WINDOW's previous and next buffers.
2648 (when killed-buffers
2649 (dolist (buffer killed-buffers
)
2650 (set-window-prev-buffers
2651 window
(assq-delete-all buffer
(window-prev-buffers window
)))
2652 (set-window-next-buffers
2653 window
(delq buffer
(window-next-buffers window
)))))
2655 ;; Return new-buffer.
2658 (defun switch-to-next-buffer (&optional window
)
2659 "In WINDOW switch to next buffer.
2660 WINDOW must be a live window and defaults to the selected one."
2662 (let* ((window (window-normalize-live-window window
))
2663 (old-buffer (window-buffer window
))
2664 (next-buffers (window-next-buffers window
))
2665 new-buffer entry killed-buffers visible
)
2666 (when (window-dedicated-p window
)
2667 (error "Window %s is dedicated to buffer %s" window old-buffer
))
2670 ;; Scan WINDOW's next buffers first.
2671 (dolist (buffer next-buffers
)
2672 (when (and (or (buffer-live-p buffer
)
2673 (not (setq killed-buffers
2674 (cons buffer killed-buffers
))))
2675 (not (eq buffer old-buffer
))
2676 (setq entry
(assq buffer
(window-prev-buffers window
))))
2677 (setq new-buffer buffer
)
2678 (set-window-buffer-start-and-point
2679 window new-buffer
(nth 1 entry
) (nth 2 entry
))
2681 ;; Scan the buffer list of WINDOW's frame next, skipping previous
2683 (dolist (buffer (buffer-list (window-frame window
)))
2684 (when (and (buffer-live-p buffer
) (not (eq buffer old-buffer
))
2685 (not (eq (aref (buffer-name buffer
) 0) ?\s
))
2686 (not (assq buffer
(window-prev-buffers window
))))
2687 (if (get-buffer-window buffer
)
2688 ;; Try to avoid showing a buffer visible in some other window.
2689 (setq visible buffer
)
2690 (setq new-buffer buffer
)
2691 (set-window-buffer-start-and-point window new-buffer
)
2693 ;; Scan WINDOW's reverted previous buffers last (must not use
2695 (dolist (entry (reverse (window-prev-buffers window
)))
2696 (when (and (setq new-buffer
(car entry
))
2697 (or (buffer-live-p new-buffer
)
2698 (not (setq killed-buffers
2699 (cons new-buffer killed-buffers
))))
2700 (not (eq new-buffer old-buffer
)))
2701 (set-window-buffer-start-and-point
2702 window new-buffer
(nth 1 entry
) (nth 2 entry
))
2705 ;; Show a buffer visible in another window.
2707 (setq new-buffer visible
)
2708 (set-window-buffer-start-and-point window new-buffer
)))
2710 ;; Remove `new-buffer' from and restore WINDOW's next buffers.
2711 (set-window-next-buffers window
(delq new-buffer next-buffers
))
2713 ;; Remove killed buffers from WINDOW's previous and next buffers.
2714 (when killed-buffers
2715 (dolist (buffer killed-buffers
)
2716 (set-window-prev-buffers
2717 window
(assq-delete-all buffer
(window-prev-buffers window
)))
2718 (set-window-next-buffers
2719 window
(delq buffer
(window-next-buffers window
)))))
2721 ;; Return new-buffer.
2724 (defun get-next-valid-buffer (list &optional buffer visible-ok frame
)
2725 "Search LIST for a valid buffer to display in FRAME.
2726 Return nil when all buffers in LIST are undesirable for display,
2727 otherwise return the first suitable buffer in LIST.
2729 Buffers not visible in windows are preferred to visible buffers,
2730 unless VISIBLE-OK is non-nil.
2731 If the optional argument FRAME is nil, it defaults to the selected frame.
2732 If BUFFER is non-nil, ignore occurrences of that buffer in LIST."
2733 ;; This logic is more or less copied from other-buffer.
2734 (setq frame
(or frame
(selected-frame)))
2735 (let ((pred (frame-parameter frame
'buffer-predicate
))
2737 (while (and (not found
) list
)
2738 (setq buf
(car list
))
2739 (if (and (not (eq buffer buf
))
2741 (or (null pred
) (funcall pred buf
))
2742 (not (eq (aref (buffer-name buf
) 0) ?\s
))
2743 (or visible-ok
(null (get-buffer-window buf
'visible
))))
2745 (setq list
(cdr list
))))
2748 (defun last-buffer (&optional buffer visible-ok frame
)
2749 "Return the last buffer in FRAME's buffer list.
2750 If BUFFER is the last buffer, return the preceding buffer
2751 instead. Buffers not visible in windows are preferred to visible
2752 buffers, unless optional argument VISIBLE-OK is non-nil.
2753 Optional third argument FRAME nil or omitted means use the
2754 selected frame's buffer list. If no such buffer exists, return
2755 the buffer `*scratch*', creating it if necessary."
2756 (setq frame
(or frame
(selected-frame)))
2757 (or (get-next-valid-buffer (nreverse (buffer-list frame
))
2758 buffer visible-ok frame
)
2759 (get-buffer "*scratch*")
2760 (let ((scratch (get-buffer-create "*scratch*")))
2761 (set-buffer-major-mode scratch
)
2764 (defcustom frame-auto-hide-function
#'iconify-frame
2765 "Function called to automatically hide frames.
2766 The function is called with one argument - a frame.
2768 Functions affected by this option are those that bury a buffer
2769 shown in a separate frame like `quit-window' and `bury-buffer'."
2770 :type
'(choice (const :tag
"Iconify" iconify-frame
)
2771 (const :tag
"Delete" delete-frame
)
2772 (const :tag
"Do nothing" ignore
)
2777 (defun window--delete (&optional window dedicated-only kill
)
2778 "Delete WINDOW if possible.
2779 WINDOW must be a live window and defaults to the selected one.
2780 Optional argument DEDICATED-ONLY non-nil means to delete WINDOW
2781 only if it's dedicated to its buffer. Optional argument KILL
2782 means the buffer shown in window will be killed. Return non-nil
2783 if WINDOW gets deleted."
2784 (setq window
(window-normalize-live-window window
))
2785 (unless (and dedicated-only
(not (window-dedicated-p window
)))
2786 (let* ((buffer (window-buffer window
))
2787 (deletable (window-deletable-p window
)))
2789 ((eq deletable
'frame
)
2790 (let ((frame (window-frame window
)))
2791 (when (functionp frame-auto-hide-function
)
2792 (funcall frame-auto-hide-function frame
)))
2795 (delete-window window
)
2798 (defun bury-buffer (&optional buffer-or-name
)
2799 "Put BUFFER-OR-NAME at the end of the list of all buffers.
2800 There it is the least likely candidate for `other-buffer' to
2801 return; thus, the least likely buffer for \\[switch-to-buffer] to
2804 You can specify a buffer name as BUFFER-OR-NAME, or an actual
2805 buffer object. If BUFFER-OR-NAME is nil or omitted, bury the
2806 current buffer. Also, if BUFFER-OR-NAME is nil or omitted,
2807 remove the current buffer from the selected window if it is
2810 (let* ((buffer (window-normalize-buffer buffer-or-name
)))
2811 ;; If `buffer-or-name' is not on the selected frame we unrecord it
2812 ;; although it's not "here" (call it a feature).
2813 (bury-buffer-internal buffer
)
2814 ;; Handle case where `buffer-or-name' is nil and the current buffer
2815 ;; is shown in the selected window.
2817 ((or buffer-or-name
(not (eq buffer
(window-buffer)))))
2818 ((window--delete nil t
))
2820 ;; Switch to another buffer in window.
2821 (set-window-dedicated-p nil nil
)
2822 (switch-to-prev-buffer nil
'kill
)))
2824 ;; Always return nil.
2827 (defun unbury-buffer ()
2828 "Switch to the last buffer in the buffer list."
2830 (switch-to-buffer (last-buffer)))
2832 (defun next-buffer ()
2833 "In selected window switch to next buffer."
2835 (if (window-minibuffer-p)
2836 (error "Cannot switch buffers in minibuffer window"))
2837 (switch-to-next-buffer))
2839 (defun previous-buffer ()
2840 "In selected window switch to previous buffer."
2842 (if (window-minibuffer-p)
2843 (error "Cannot switch buffers in minibuffer window"))
2844 (switch-to-prev-buffer))
2846 (defun delete-windows-on (&optional buffer-or-name frame
)
2847 "Delete all windows showing BUFFER-OR-NAME.
2848 BUFFER-OR-NAME may be a buffer or the name of an existing buffer
2849 and defaults to the current buffer.
2851 The following non-nil values of the optional argument FRAME
2852 have special meanings:
2854 - t means consider all windows on the selected frame only.
2856 - `visible' means consider all windows on all visible frames on
2857 the current terminal.
2859 - 0 (the number zero) means consider all windows on all visible
2860 and iconified frames on the current terminal.
2862 - A frame means consider all windows on that frame only.
2864 Any other value of FRAME means consider all windows on all
2867 When a window showing BUFFER-OR-NAME is dedicated and the only
2868 window of its frame, that frame is deleted when there are other
2870 (interactive "BDelete windows on (buffer):\nP")
2871 (let ((buffer (window-normalize-buffer buffer-or-name
))
2872 ;; Handle the "inverted" meaning of the FRAME argument wrt other
2873 ;; `window-list-1' based function.
2874 (all-frames (cond ((not frame
) t
) ((eq frame t
) nil
) (t frame
))))
2875 (dolist (window (window-list-1 nil nil all-frames
))
2876 (if (eq (window-buffer window
) buffer
)
2877 (let ((deletable (window-deletable-p window
)))
2879 ((and (eq deletable
'frame
) (window-dedicated-p window
))
2880 ;; Delete frame if and only if window is dedicated.
2881 (delete-frame (window-frame window
)))
2884 (delete-window window
))
2886 ;; In window switch to previous buffer.
2887 (set-window-dedicated-p window nil
)
2888 (switch-to-prev-buffer window
'bury
))))
2889 ;; If a window doesn't show BUFFER, unrecord BUFFER in it.
2890 (unrecord-window-buffer window buffer
)))))
2892 (defun replace-buffer-in-windows (&optional buffer-or-name
)
2893 "Replace BUFFER-OR-NAME with some other buffer in all windows showing it.
2894 BUFFER-OR-NAME may be a buffer or the name of an existing buffer
2895 and defaults to the current buffer.
2897 When a window showing BUFFER-OR-NAME is dedicated, that window is
2898 deleted. If that window is the only window on its frame, the
2899 frame is deleted too when there are other frames left. If there
2900 are no other frames left, some other buffer is displayed in that
2903 This function removes the buffer denoted by BUFFER-OR-NAME from
2904 all window-local buffer lists."
2905 (let ((buffer (window-normalize-buffer buffer-or-name
)))
2906 (dolist (window (window-list-1 nil nil t
))
2907 (if (eq (window-buffer window
) buffer
)
2908 (unless (window--delete window t t
)
2909 ;; Switch to another buffer in window.
2910 (set-window-dedicated-p window nil
)
2911 (switch-to-prev-buffer window
'kill
))
2912 ;; Unrecord BUFFER in WINDOW.
2913 (unrecord-window-buffer window buffer
)))))
2915 (defun quit-window (&optional kill window
)
2916 "Quit WINDOW and bury its buffer.
2917 WINDOW must be a live window and defaults to the selected one.
2918 With prefix argument KILL non-nil, kill the buffer instead of
2921 According to information stored in WINDOW's `quit-restore' window
2922 parameter either \(1) delete WINDOW and its frame, \(2) delete
2923 WINDOW, \(3) restore the buffer previously displayed in WINDOW,
2924 or \(4) make WINDOW display some other buffer than the present
2925 one. If non-nil, reset `quit-restore' parameter to nil."
2927 (setq window
(window-normalize-live-window window
))
2928 (let* ((buffer (window-buffer window
))
2929 (quit-restore (window-parameter window
'quit-restore
))
2931 (let* ((prev-buffers (window-prev-buffers window
))
2932 (prev-buffer (caar prev-buffers
)))
2933 (and (or (not (eq prev-buffer buffer
))
2934 (and (cdr prev-buffers
)
2935 (not (eq (setq prev-buffer
(cadr prev-buffers
))
2940 ((and (not prev-buffer
)
2941 (memq (nth 1 quit-restore
) '(window frame
))
2942 (eq (nth 3 quit-restore
) buffer
)
2943 ;; Delete WINDOW if possible.
2944 (window--delete window nil kill
))
2945 ;; If the previously selected window is still alive, select it.
2946 (when (window-live-p (nth 2 quit-restore
))
2947 (select-window (nth 2 quit-restore
))))
2948 ((and (listp (setq quad
(nth 1 quit-restore
)))
2949 (buffer-live-p (car quad
))
2950 (eq (nth 3 quit-restore
) buffer
))
2951 ;; Show another buffer stored in quit-restore parameter.
2952 (setq resize
(with-current-buffer buffer
2953 (and temp-buffer-resize-mode
2954 (/= (nth 3 quad
) (window-total-size window
)))))
2955 (unrecord-window-buffer window buffer
)
2956 (set-window-dedicated-p window nil
)
2958 ;; Try to resize WINDOW to its old height but don't signal an
2961 (window-resize window
(- (nth 3 quad
) (window-total-size window
)))
2963 ;; Restore WINDOW's previous buffer, window start and point.
2964 (set-window-buffer-start-and-point
2965 window
(nth 0 quad
) (nth 1 quad
) (nth 2 quad
))
2966 ;; Reset the quit-restore parameter.
2967 (set-window-parameter window
'quit-restore nil
)
2968 ;; Select old window.
2969 (when (window-live-p (nth 2 quit-restore
))
2970 (select-window (nth 2 quit-restore
))))
2972 ;; Show some other buffer in WINDOW and reset the quit-restore
2974 (set-window-parameter window
'quit-restore nil
)
2975 ;; Make sure that WINDOW is no more dedicated.
2976 (set-window-dedicated-p window nil
)
2977 (switch-to-prev-buffer window
'bury-or-kill
)))
2979 ;; Kill WINDOW's old-buffer if requested
2981 (kill-buffer buffer
)
2982 (bury-buffer-internal buffer
))))
2984 ;;; Splitting windows.
2985 (defsubst window-split-min-size
(&optional horizontal
)
2986 "Return minimum height of any window when splitting windows.
2987 Optional argument HORIZONTAL non-nil means return minimum width."
2989 (max window-min-width window-safe-min-width
)
2990 (max window-min-height window-safe-min-height
)))
2992 (defun split-window (&optional window size side
)
2993 "Make a new window adjacent to WINDOW.
2994 WINDOW can be any window and defaults to the selected one.
2995 Return the new window which is always a live window.
2997 Optional argument SIZE a positive number means make WINDOW SIZE
2998 lines or columns tall. If SIZE is negative, make the new window
2999 -SIZE lines or columns tall. If and only if SIZE is non-nil, its
3000 absolute value can be less than `window-min-height' or
3001 `window-min-width'; so this command can make a new window as
3002 small as one line or two columns. SIZE defaults to half of
3003 WINDOW's size. Interactively, SIZE is the prefix argument.
3005 Optional third argument SIDE nil (or `below') specifies that the
3006 new window shall be located below WINDOW. SIDE `above' means the
3007 new window shall be located above WINDOW. In both cases SIZE
3008 specifies the new number of lines for WINDOW \(or the new window
3009 if SIZE is negative) including space reserved for the mode and/or
3012 SIDE t (or `right') specifies that the new window shall be
3013 located on the right side of WINDOW. SIDE `left' means the new
3014 window shall be located on the left of WINDOW. In both cases
3015 SIZE specifies the new number of columns for WINDOW \(or the new
3016 window provided SIZE is negative) including space reserved for
3017 fringes and the scrollbar or a divider column. Any other non-nil
3018 value for SIDE is currently handled like t (or `right').
3020 If the variable `ignore-window-parameters' is non-nil or the
3021 `split-window' parameter of WINDOW equals t, do not process any
3022 parameters of WINDOW. Otherwise, if the `split-window' parameter
3023 of WINDOW specifies a function, call that function with all three
3024 arguments and return the value returned by that function.
3026 Otherwise, if WINDOW is part of an atomic window, \"split\" the
3027 root of that atomic window. The new window does not become a
3028 member of that atomic window.
3030 If WINDOW is live, properties of the new window like margins and
3031 scrollbars are inherited from WINDOW. If WINDOW is an internal
3032 window, these properties as well as the buffer displayed in the
3033 new window are inherited from the window selected on WINDOW's
3034 frame. The selected window is not changed by this function."
3036 (setq window
(window-normalize-any-window window
))
3039 ((memq side
'(below above right left
)) side
)
3041 (horizontal (not (memq side
'(nil below above
))))
3042 (frame (window-frame window
))
3043 (parent (window-parent window
))
3044 (function (window-parameter window
'split-window
))
3045 (window-side (window-parameter window
'window-side
))
3046 ;; Rebind `window-nest' since in some cases we may have to
3047 ;; override its value.
3048 (window-nest window-nest
)
3051 (window-check frame
)
3054 ;; Ignore window parameters if either `ignore-window-parameters'
3055 ;; is t or the `split-window' parameter equals t.
3056 ((or ignore-window-parameters
(eq function t
)))
3057 ((functionp function
)
3058 ;; The `split-window' parameter specifies the function to call.
3059 ;; If that function is `ignore', do nothing.
3060 (throw 'done
(funcall function window size side
)))
3061 ;; If WINDOW is a subwindow of an atomic window, split the root
3062 ;; window of that atomic window instead.
3063 ((and (window-parameter window
'window-atom
)
3064 (setq atom-root
(window-atom-root window
))
3065 (not (eq atom-root window
)))
3066 (throw 'done
(split-window atom-root size side
))))
3068 (when (and window-side
3070 (not (window-parameter parent
'window-side
))))
3071 ;; WINDOW is a side root window. To make sure that a new parent
3072 ;; window gets created set `window-nest' to t.
3073 (setq window-nest t
))
3075 (when (and window-splits size
(> size
0))
3076 ;; If `window-splits' is non-nil and SIZE is a non-negative
3077 ;; integer, we cannot reasonably resize other windows. Rather
3078 ;; bind `window-nest' to t to make sure that subsequent window
3079 ;; deletions are handled correctly.
3080 (setq window-nest t
))
3083 ;; `parent-size' is the size of WINDOW's parent, provided
3085 (when parent
(window-total-size parent horizontal
)))
3086 ;; `resize' non-nil means we are supposed to resize other
3087 ;; windows in WINDOW's combination.
3089 (and window-splits
(not window-nest
)
3090 ;; Resize makes sense in iso-combinations only.
3091 (window-iso-combined-p window horizontal
)))
3092 ;; `old-size' is the current size of WINDOW.
3093 (old-size (window-total-size window horizontal
))
3094 ;; `new-size' is the specified or calculated size of the
3099 (max (window-split-min-size horizontal
)
3101 ;; When resizing try to give the new window the
3102 ;; average size of a window in its combination.
3104 (window-min-size parent horizontal
))
3106 (1+ (window-iso-combinations
3107 parent horizontal
))))
3108 ;; Else try to give the new window half the size
3109 ;; of WINDOW (plus an eventual odd line).
3110 (+ (/ old-size
2) (% old-size
2)))))
3112 ;; SIZE non-negative specifies the new size of WINDOW.
3114 ;; Note: Specifying a non-negative SIZE is practically
3115 ;; always done as workaround for making the new window
3116 ;; appear above or on the left of the new window (the
3117 ;; ispell window is a typical example of that). In all
3118 ;; these cases the SIDE argument should be set to 'above
3119 ;; or 'left in order to support the 'resize option.
3120 ;; Here we have to nest the windows instead, see above.
3123 ;; SIZE negative specifies the size of the new window.
3125 new-parent new-normal
)
3132 ;; SIZE unspecified, resizing.
3133 (when (and (not (window-sizable-p parent
(- new-size
) horizontal
))
3134 ;; Try again with minimum split size.
3136 (max new-size
(window-split-min-size horizontal
)))
3137 (not (window-sizable-p parent
(- new-size
) horizontal
)))
3138 (error "Window %s too small for splitting" parent
)))
3139 ((> (+ new-size
(window-min-size window horizontal
)) old-size
)
3140 ;; SIZE unspecified, no resizing.
3141 (error "Window %s too small for splitting" window
))))
3143 (or (>= size old-size
)
3144 (< new-size
(if horizontal
3145 window-safe-min-width
3146 window-safe-min-width
))))
3147 ;; SIZE specified as new size of old window. If the new size
3148 ;; is larger than the old size or the size of the new window
3149 ;; would be less than the safe minimum, signal an error.
3150 (error "Window %s too small for splitting" window
))
3152 ;; SIZE specified, resizing.
3153 (unless (window-sizable-p parent
(- new-size
) horizontal
)
3154 ;; If we cannot resize the parent give up.
3155 (error "Window %s too small for splitting" parent
)))
3157 (if horizontal window-safe-min-width window-safe-min-height
))
3158 (< (- old-size new-size
)
3159 (if horizontal window-safe-min-width window-safe-min-height
)))
3160 ;; SIZE specification violates minimum size restrictions.
3161 (error "Window %s too small for splitting" window
)))
3163 (window--resize-reset frame horizontal
)
3166 ;; Make new-parent non-nil if we need a new parent window;
3167 ;; either because we want to nest or because WINDOW is not
3169 (or window-nest
(not (window-iso-combined-p window horizontal
))))
3171 ;; Make new-normal the normal size of the new window.
3173 (size (/ (float new-size
) (if new-parent old-size parent-size
)))
3175 (resize (/ 1.0 (1+ (window-iso-combinations parent horizontal
))))
3176 (t (/ (window-normal-size window horizontal
) 2.0))))
3179 ;; Try to get space from OLD's siblings. We could go "up" and
3180 ;; try getting additional space from surrounding windows but
3181 ;; we won't be able to return space to those windows when we
3182 ;; delete the one we create here. Hence we do not go up.
3184 (window--resize-subwindows parent
(- new-size
) horizontal
)
3185 (let* ((normal (- 1.0 new-normal
))
3186 (sub (window-child parent
)))
3188 (set-window-new-normal
3189 sub
(* (window-normal-size sub horizontal
) normal
))
3190 (setq sub
(window-right sub
)))))
3191 ;; Get entire space from WINDOW.
3192 (set-window-new-total window
(- old-size new-size
))
3193 (window--resize-this-window window
(- new-size
) horizontal
)
3194 (set-window-new-normal
3195 window
(- (if new-parent
1.0 (window-normal-size window horizontal
))
3198 (let* ((new (split-window-internal window new-size side new-normal
)))
3199 ;; Inherit window-side parameters, if any.
3200 (when (and window-side new-parent
)
3201 (set-window-parameter (window-parent new
) 'window-side window-side
)
3202 (set-window-parameter new
'window-side window-side
))
3204 (run-window-configuration-change-hook frame
)
3205 (window-check frame
)
3206 ;; Always return the new window.
3209 ;; I think this should be the default; I think people will prefer it--rms.
3210 (defcustom split-window-keep-point t
3211 "If non-nil, \\[split-window-above-each-other] keeps the original point \
3213 This is often more convenient for editing.
3214 If nil, adjust point in each of the two windows to minimize redisplay.
3215 This is convenient on slow terminals, but point can move strangely.
3217 This option applies only to `split-window-above-each-other' and
3218 functions that call it. `split-window' always keeps the original
3219 point in both children."
3223 (defun split-window-above-each-other (&optional size
)
3224 "Split selected window into two windows, one above the other.
3225 The upper window gets SIZE lines and the lower one gets the rest.
3226 SIZE negative means the lower window gets -SIZE lines and the
3227 upper one the rest. With no argument, split windows equally or
3228 close to it. Both windows display the same buffer, now current.
3230 If the variable `split-window-keep-point' is non-nil, both new
3231 windows will get the same value of point as the selected window.
3232 This is often more convenient for editing. The upper window is
3233 the selected window.
3235 Otherwise, we choose window starts so as to minimize the amount of
3236 redisplay; this is convenient on slow terminals. The new selected
3237 window is the one that the current value of point appears in. The
3238 value of point can change if the text around point is hidden by the
3241 Regardless of the value of `split-window-keep-point', the upper
3242 window is the original one and the return value is the new, lower
3245 (let ((old-window (selected-window))
3247 (size (and size
(prefix-numeric-value size
)))
3248 moved-by-window-height moved new-window bottom
)
3249 (when (and size
(< size
0) (< (- size
) window-min-height
))
3250 ;; `split-window' would not signal an error here.
3251 (error "Size of new window too small"))
3252 (setq new-window
(split-window nil size
))
3253 (unless split-window-keep-point
3254 (with-current-buffer (window-buffer)
3255 (goto-char (window-start))
3256 (setq moved
(vertical-motion (window-height)))
3257 (set-window-start new-window
(point))
3258 (when (> (point) (window-point new-window
))
3259 (set-window-point new-window
(point)))
3260 (when (= moved
(window-height))
3261 (setq moved-by-window-height t
)
3262 (vertical-motion -
1))
3263 (setq bottom
(point)))
3264 (and moved-by-window-height
3266 (set-window-point old-window
(1- bottom
)))
3267 (and moved-by-window-height
3268 (<= (window-start new-window
) old-point
)
3269 (set-window-point new-window old-point
)
3270 (select-window new-window
)))
3271 ;; Always copy quit-restore parameter in interactive use.
3272 (let ((quit-restore (window-parameter old-window
'quit-restore
)))
3274 (set-window-parameter new-window
'quit-restore quit-restore
)))
3277 (defalias 'split-window-vertically
'split-window-above-each-other
)
3279 (defun split-window-side-by-side (&optional size
)
3280 "Split selected window into two windows side by side.
3281 The selected window becomes the left one and gets SIZE columns.
3282 SIZE negative means the right window gets -SIZE columns.
3284 SIZE includes the width of the window's scroll bar; if there are
3285 no scroll bars, it includes the width of the divider column to
3286 the window's right, if any. SIZE omitted or nil means split
3289 The selected window remains selected. Return the new window."
3291 (let ((old-window (selected-window))
3292 (size (and size
(prefix-numeric-value size
)))
3294 (when (and size
(< size
0) (< (- size
) window-min-width
))
3295 ;; `split-window' would not signal an error here.
3296 (error "Size of new window too small"))
3297 (setq new-window
(split-window nil size t
))
3298 ;; Always copy quit-restore parameter in interactive use.
3299 (let ((quit-restore (window-parameter old-window
'quit-restore
)))
3301 (set-window-parameter new-window
'quit-restore quit-restore
)))
3304 (defalias 'split-window-horizontally
'split-window-side-by-side
)
3306 ;;; Balancing windows.
3308 ;; The following routine uses the recycled code from an old version of
3309 ;; `window--resize-subwindows'. It's not very pretty, but coding it the way the
3310 ;; new `window--resize-subwindows' code does would hardly make it any shorter or
3311 ;; more readable (FWIW we'd need three loops - one to calculate the
3312 ;; minimum sizes per window, one to enlarge or shrink windows until the
3313 ;; new parent-size matches, and one where we shrink the largest/enlarge
3314 ;; the smallest window).
3315 (defun balance-windows-2 (window horizontal
)
3316 "Subroutine of `balance-windows-1'.
3317 WINDOW must be an iso-combination."
3318 (let* ((first (window-child window
))
3320 (number-of-children 0)
3321 (parent-size (window-new-total window
))
3322 (total-sum parent-size
)
3323 found failed size sub-total sub-delta sub-amount rest
)
3325 (setq number-of-children
(1+ number-of-children
))
3326 (when (window-size-fixed-p sub horizontal
)
3328 (- total-sum
(window-total-size sub horizontal
)))
3329 (set-window-new-normal sub
'ignore
))
3330 (setq sub
(window-right sub
)))
3333 (while (and failed
(> number-of-children
0))
3334 (setq size
(/ total-sum number-of-children
))
3337 (while (and sub
(not failed
))
3338 ;; Ignore subwindows that should be ignored or are stuck.
3339 (unless (window--resize-subwindows-skip-p sub
)
3341 (setq sub-total
(window-total-size sub horizontal
))
3342 (setq sub-delta
(- size sub-total
))
3344 (window-sizable sub sub-delta horizontal
))
3345 ;; Register the new total size for this subwindow.
3346 (set-window-new-total sub
(+ sub-total sub-amount
))
3347 (unless (= sub-amount sub-delta
)
3348 (setq total-sum
(- total-sum sub-total sub-amount
))
3349 (setq number-of-children
(1- number-of-children
))
3350 ;; We failed and need a new round.
3352 (set-window-new-normal sub
'skip
)))
3353 (setq sub
(window-right sub
))))
3355 (setq rest
(% total-sum number-of-children
))
3356 ;; Fix rounding by trying to enlarge non-stuck windows by one line
3357 ;; (column) until `rest' is zero.
3359 (while (and sub
(> rest
0))
3360 (unless (window--resize-subwindows-skip-p window
)
3361 (set-window-new-total sub
1 t
)
3362 (setq rest
(1- rest
)))
3363 (setq sub
(window-right sub
)))
3365 ;; Fix rounding by trying to enlarge stuck windows by one line
3366 ;; (column) until `rest' equals zero.
3368 (while (and sub
(> rest
0))
3369 (unless (eq (window-new-normal sub
) 'ignore
)
3370 (set-window-new-total sub
1 t
)
3371 (setq rest
(1- rest
)))
3372 (setq sub
(window-right sub
)))
3376 ;; Record new normal sizes.
3377 (set-window-new-normal
3378 sub
(/ (if (eq (window-new-normal sub
) 'ignore
)
3379 (window-total-size sub horizontal
)
3380 (window-new-total sub
))
3381 (float parent-size
)))
3382 ;; Recursively balance each subwindow's subwindows.
3383 (balance-windows-1 sub horizontal
)
3384 (setq sub
(window-right sub
)))))
3386 (defun balance-windows-1 (window &optional horizontal
)
3387 "Subroutine of `balance-windows'."
3388 (if (window-child window
)
3389 (let ((sub (window-child window
)))
3390 (if (window-iso-combined-p sub horizontal
)
3391 (balance-windows-2 window horizontal
)
3392 (let ((size (window-new-total window
)))
3394 (set-window-new-total sub size
)
3395 (balance-windows-1 sub horizontal
)
3396 (setq sub
(window-right sub
))))))))
3398 (defun balance-windows (&optional window-or-frame
)
3399 "Balance the sizes of subwindows of WINDOW-OR-FRAME.
3400 WINDOW-OR-FRAME is optional and defaults to the selected frame.
3401 If WINDOW-OR-FRAME denotes a frame, balance the sizes of all
3402 subwindows of that frame's root window. If WINDOW-OR-FRAME
3403 denots a window, balance the sizes of all subwindows of that
3408 ((or (not window-or-frame
)
3409 (frame-live-p window-or-frame
))
3410 (frame-root-window window-or-frame
))
3411 ((or (window-live-p window-or-frame
)
3412 (window-child window-or-frame
))
3415 (error "Not a window or frame %s" window-or-frame
))))
3416 (frame (window-frame window
)))
3417 ;; Balance vertically.
3418 (window--resize-reset (window-frame window
))
3419 (balance-windows-1 window
)
3420 (window-resize-apply frame
)
3421 ;; Balance horizontally.
3422 (window--resize-reset (window-frame window
) t
)
3423 (balance-windows-1 window t
)
3424 (window-resize-apply frame t
)))
3426 (defun window-fixed-size-p (&optional window direction
)
3427 "Return t if WINDOW cannot be resized in DIRECTION.
3428 WINDOW defaults to the selected window. DIRECTION can be
3429 nil (i.e. any), `height' or `width'."
3430 (with-current-buffer (window-buffer window
)
3431 (when (and (boundp 'window-size-fixed
) window-size-fixed
)
3433 (member (cons direction window-size-fixed
)
3434 '((height . width
) (width . height
))))))))
3436 ;;; A different solution to balance-windows.
3437 (defvar window-area-factor
1
3438 "Factor by which the window area should be over-estimated.
3439 This is used by `balance-windows-area'.
3440 Changing this globally has no effect.")
3441 (make-variable-buffer-local 'window-area-factor
)
3443 (defun balance-windows-area-adjust (window delta horizontal
)
3444 "Wrapper around `window-resize' with error checking.
3445 Arguments WINDOW, DELTA and HORIZONTAL are passed on to that function."
3446 ;; `window-resize' may fail if delta is too large.
3447 (while (>= (abs delta
) 1)
3450 (window-resize window delta horizontal
)
3453 ;;(message "adjust: %s" (error-message-string err))
3454 (setq delta
(/ delta
2))))))
3456 (defun balance-windows-area ()
3457 "Make all visible windows the same area (approximately).
3458 See also `window-area-factor' to change the relative size of
3461 (let* ((unchanged 0) (carry 0) (round 0)
3462 ;; Remove fixed-size windows.
3463 (wins (delq nil
(mapcar (lambda (win)
3464 (if (not (window-fixed-size-p win
)) win
))
3465 (window-list nil
'nomini
))))
3468 ;; Resizing a window changes the size of surrounding windows in complex
3469 ;; ways, so it's difficult to balance them all. The introduction of
3470 ;; `adjust-window-trailing-edge' made it a bit easier, but it is still
3471 ;; very difficult to do. `balance-window' above takes an off-line
3472 ;; approach: get the whole window tree, then balance it, then try to
3473 ;; adjust the windows so they fit the result.
3474 ;; Here, instead, we take a "local optimization" approach, where we just
3475 ;; go through all the windows several times until nothing needs to be
3476 ;; changed. The main problem with this approach is that it's difficult
3477 ;; to make sure it terminates, so we use some heuristic to try and break
3478 ;; off infinite loops.
3479 ;; After a round without any change, we allow a second, to give a chance
3480 ;; to the carry to propagate a minor imbalance from the end back to
3482 (while (< unchanged
2)
3483 ;; (message "New round")
3484 (setq unchanged
(1+ unchanged
) round
(1+ round
))
3487 (while (progn (setq next
(next-window next
))
3488 (window-fixed-size-p next
)))
3489 ;; (assert (eq next (or (cadr (member win wins)) (car wins))))
3491 (< (car (window-edges win
)) (car (window-edges next
))))
3492 (areadiff (/ (- (* (window-height next
) (window-width next
)
3493 (buffer-local-value 'window-area-factor
3494 (window-buffer next
)))
3495 (* (window-height win
) (window-width win
)
3496 (buffer-local-value 'window-area-factor
3497 (window-buffer win
))))
3498 (max (buffer-local-value 'window-area-factor
3499 (window-buffer win
))
3500 (buffer-local-value 'window-area-factor
3501 (window-buffer next
)))))
3503 (+ (window-height win
) (window-height next
))
3504 (+ (window-width win
) (window-width next
))))
3505 (diff (/ areadiff edgesize
)))
3507 ;; Maybe diff is actually closer to 1 than to 0.
3508 (setq diff
(/ (* 3 areadiff
) (* 2 edgesize
))))
3509 (when (and (zerop diff
) (not (zerop areadiff
)))
3510 (setq diff
(/ (+ areadiff carry
) edgesize
))
3511 ;; Change things smoothly.
3512 (if (or (> diff
1) (< diff -
1)) (setq diff
(/ diff
2))))
3514 ;; Make sure negligible differences don't accumulate to
3515 ;; become significant.
3516 (setq carry
(+ carry areadiff
))
3517 ;; This used `adjust-window-trailing-edge' before and uses
3518 ;; `window-resize' now. Error wrapping is still needed.
3519 (balance-windows-area-adjust win diff horiz
)
3521 (let ((change (cons win
(window-edges win
))))
3522 ;; If the same change has been seen already for this window,
3523 ;; we're most likely in an endless loop, so don't count it as
3525 (unless (member change changelog
)
3526 (push change changelog
)
3527 (setq unchanged
0 carry
0)))))))
3528 ;; We've now basically balanced all the windows.
3529 ;; But there may be some minor off-by-one imbalance left over,
3530 ;; so let's do some fine tuning.
3531 ;; (bw-finetune wins)
3532 ;; (message "Done in %d rounds" round)
3535 ;;; Window states, how to get them and how to put them in a window.
3536 (defsubst window-list-no-nils
(&rest args
)
3537 "Like LIST but do not add nil elements of ARGS."
3538 (delq nil
(apply 'list args
)))
3540 (defvar window-state-ignored-parameters
'(quit-restore)
3541 "List of window parameters ignored by `window-state-get'.")
3543 (defun window-state-get-1 (window &optional markers
)
3544 "Helper function for `window-state-get'."
3547 ((window-top-child window
) 'vc
)
3548 ((window-left-child window
) 'hc
)
3550 (buffer (window-buffer window
))
3551 (selected (eq window
(selected-window)))
3553 (window-list-no-nils
3555 (unless (window-next-sibling window
) (cons 'last t
))
3556 (cons 'total-height
(window-total-size window
))
3557 (cons 'total-width
(window-total-size window t
))
3558 (cons 'normal-height
(window-normal-size window
))
3559 (cons 'normal-width
(window-normal-size window t
))
3560 (cons 'splits
(window-splits window
))
3561 (cons 'nest
(window-nest window
))
3563 (dolist (parameter (window-parameters window
))
3564 (unless (memq (car parameter
)
3565 window-state-ignored-parameters
)
3566 (setq list
(cons parameter list
))))
3567 (unless (window-parameter window
'clone-of
)
3568 ;; Make a clone-of parameter.
3569 (setq list
(cons (cons 'clone-of window
) list
)))
3571 (cons 'parameters list
)))
3573 ;; All buffer related things go in here - make the buffer
3574 ;; current when retrieving `point' and `mark'.
3575 (with-current-buffer (window-buffer window
)
3576 (let ((point (window-point-1 window
))
3577 (start (window-start window
))
3579 (window-list-no-nils
3580 'buffer
(buffer-name buffer
)
3581 (cons 'selected selected
)
3582 (when window-size-fixed
(cons 'size-fixed window-size-fixed
))
3583 (cons 'hscroll
(window-hscroll window
))
3584 (cons 'fringes
(window-fringes window
))
3585 (cons 'margins
(window-margins window
))
3586 (cons 'scroll-bars
(window-scroll-bars window
))
3587 (cons 'vscroll
(window-vscroll window
))
3588 (cons 'dedicated
(window-dedicated-p window
))
3589 (cons 'point
(if markers
(copy-marker point
) point
))
3590 (cons 'start
(if markers
(copy-marker start
) start
))
3592 (cons 'mark
(if markers
(copy-marker mark
) mark
)))))))))
3594 (when (memq type
'(vc hc
))
3596 (setq window
(window-child window
))
3598 (setq list
(cons (window-state-get-1 window markers
) list
))
3599 (setq window
(window-right window
)))
3601 (append head tail
)))
3603 (defun window-state-get (&optional window markers
)
3604 "Return state of WINDOW as a Lisp object.
3605 WINDOW can be any window and defaults to the root window of the
3608 Optional argument MARKERS non-nil means use markers for sampling
3609 positions like `window-point' or `window-start'. MARKERS should
3610 be non-nil only if the value is used for putting the state back
3611 in the same session (note that markers slow down processing).
3613 The return value can be used as argument for `window-state-put'
3614 to put the state recorded here into an arbitrary window. The
3615 value can be also stored on disk and read back in a new session."
3618 (if (window-any-p window
)
3620 (error "%s is not a live or internal window" window
))
3621 (frame-root-window)))
3622 ;; The return value is a cons whose car specifies some constraints on
3623 ;; the size of WINDOW. The cdr lists the states of the subwindows of
3626 ;; Frame related things would go into a function, say `frame-state',
3627 ;; calling `window-state-get' to insert the frame's root window.
3628 (window-list-no-nils
3629 (cons 'min-height
(window-min-size window
))
3630 (cons 'min-width
(window-min-size window t
))
3631 (cons 'min-height-ignore
(window-min-size window nil t
))
3632 (cons 'min-width-ignore
(window-min-size window t t
))
3633 (cons 'min-height-safe
(window-min-size window nil
'safe
))
3634 (cons 'min-width-safe
(window-min-size window t
'safe
))
3635 ;; These are probably not needed.
3636 (when (window-size-fixed-p window
) (cons 'fixed-height t
))
3637 (when (window-size-fixed-p window t
) (cons 'fixed-width t
)))
3638 (window-state-get-1 window markers
)))
3640 (defvar window-state-put-list nil
3641 "Helper variable for `window-state-put'.")
3643 (defun window-state-put-1 (state &optional window ignore totals
)
3644 "Helper function for `window-state-put'."
3645 (let ((type (car state
)))
3646 (setq state
(cdr state
))
3649 ;; For a leaf window just add unprocessed entries to
3650 ;; `window-state-put-list'.
3651 (setq window-state-put-list
3652 (cons (cons window state
) window-state-put-list
)))
3653 ((memq type
'(vc hc
))
3654 (let* ((horizontal (eq type
'hc
))
3655 (total (window-total-size window horizontal
))
3658 (dolist (item state
)
3659 ;; Find the next child window. WINDOW always points to the
3660 ;; real window that we want to fill with what we find here.
3661 (when (memq (car item
) '(leaf vc hc
))
3662 (if (assq 'last item
)
3663 ;; The last child window. Below `window-state-put-1'
3664 ;; will put into it whatever ITEM has in store.
3666 ;; Not the last child window, prepare for splitting
3667 ;; WINDOW. SIZE is the new (and final) size of the old
3672 (cdr (assq (if horizontal
'total-width
'total-height
) item
))
3673 ;; Use normalized size and round.
3676 (if horizontal
'normal-width
'normal-height
)
3679 ;; Use safe sizes, we try to resize later.
3680 (setq size
(max size
(if horizontal
3681 window-safe-min-height
3682 window-safe-min-width
)))
3684 (if (window-sizable-p window
(- size
) horizontal
'safe
)
3685 (let* ((window-nest (assq 'nest item
)))
3686 ;; We must inherit the nesting, otherwise we might mess
3687 ;; up handling of atomic and side window.
3688 (setq new
(split-window window size horizontal
)))
3689 ;; Give up if we can't resize window down to safe sizes.
3690 (error "Cannot resize window %s" window
))
3694 ;; When creating the first child window add for parent
3695 ;; unprocessed entries to `window-state-put-list'.
3696 (setq window-state-put-list
3697 (cons (cons (window-parent window
) state
)
3698 window-state-put-list
))))
3700 ;; Now process the current window (either the one we've just
3701 ;; split or the last child of its parent).
3702 (window-state-put-1 item window ignore totals
)
3703 ;; Continue with the last window split off.
3704 (setq window new
))))))))
3706 (defun window-state-put-2 (ignore)
3707 "Helper function for `window-state-put'."
3708 (dolist (item window-state-put-list
)
3709 (let ((window (car item
))
3710 (splits (cdr (assq 'splits item
)))
3711 (nest (cdr (assq 'nest item
)))
3712 (parameters (cdr (assq 'parameters item
)))
3713 (state (cdr (assq 'buffer item
))))
3714 (when splits
(set-window-splits window splits
))
3715 (when nest
(set-window-nest window nest
))
3716 ;; Process parameters.
3718 (dolist (parameter parameters
)
3719 (set-window-parameter window
(car parameter
) (cdr parameter
))))
3720 ;; Process buffer related state.
3722 ;; We don't want to raise an error here so we create a buffer if
3724 (set-window-buffer window
(get-buffer-create (car state
)))
3725 (with-current-buffer (window-buffer window
)
3726 (set-window-hscroll window
(cdr (assq 'hscroll state
)))
3727 (apply 'set-window-fringes
3728 (cons window
(cdr (assq 'fringes state
))))
3729 (let ((margins (cdr (assq 'margins state
))))
3730 (set-window-margins window
(car margins
) (cdr margins
)))
3731 (let ((scroll-bars (cdr (assq 'scroll-bars state
))))
3732 (set-window-scroll-bars
3733 window
(car scroll-bars
) (nth 2 scroll-bars
) (nth 3 scroll-bars
)))
3734 (set-window-vscroll window
(cdr (assq 'vscroll state
)))
3735 ;; Adjust vertically.
3736 (if (memq window-size-fixed
'(t height
))
3737 ;; A fixed height window, try to restore the original size.
3738 (let ((delta (- (cdr (assq 'total-height item
))
3739 (window-total-height window
)))
3741 (when (window-resizable-p window delta
)
3742 (window-resize window delta
)))
3743 ;; Else check whether the window is not high enough.
3744 (let* ((min-size (window-min-size window nil ignore
))
3745 (delta (- min-size
(window-total-size window
))))
3746 (when (and (> delta
0)
3747 (window-resizable-p window delta nil ignore
))
3748 (window-resize window delta nil ignore
))))
3749 ;; Adjust horizontally.
3750 (if (memq window-size-fixed
'(t width
))
3751 ;; A fixed width window, try to restore the original size.
3752 (let ((delta (- (cdr (assq 'total-width item
))
3753 (window-total-width window
)))
3755 (when (window-resizable-p window delta
)
3756 (window-resize window delta
)))
3757 ;; Else check whether the window is not wide enough.
3758 (let* ((min-size (window-min-size window t ignore
))
3759 (delta (- min-size
(window-total-size window t
))))
3760 (when (and (> delta
0)
3761 (window-resizable-p window delta t ignore
))
3762 (window-resize window delta t ignore
))))
3763 ;; Set dedicated status.
3764 (set-window-dedicated-p window
(cdr (assq 'dedicated state
)))
3765 ;; Install positions (maybe we should do this after all windows
3766 ;; have been created and sized).
3768 (set-window-start window
(cdr (assq 'start state
)))
3769 (set-window-point window
(cdr (assq 'point state
)))
3770 ;; I'm not sure whether we should set the mark here, but maybe
3772 (let ((mark (cdr (assq 'mark state
))))
3773 (when mark
(set-mark mark
))))
3774 ;; Select window if it's the selected one.
3775 (when (cdr (assq 'selected state
))
3776 (select-window window
)))))))
3778 (defun window-state-put (state &optional window ignore
)
3779 "Put window state STATE into WINDOW.
3780 STATE should be the state of a window returned by an earlier
3781 invocation of `window-state-get'. Optional argument WINDOW must
3782 specify a live window and defaults to the selected one.
3784 Optional argument IGNORE non-nil means ignore minimum window
3785 sizes and fixed size restrictions. IGNORE equal `safe' means
3786 subwindows can get as small as `window-safe-min-height' and
3787 `window-safe-min-width'."
3788 (setq window
(window-normalize-live-window window
))
3789 (let* ((frame (window-frame window
))
3791 ;; We check here (1) whether the total sizes of root window of
3792 ;; STATE and that of WINDOW are equal so we can avoid
3793 ;; calculating new sizes, and (2) if we do have to resize
3794 ;; whether we can do so without violating size restrictions.
3796 (and (= (window-total-size window
)
3797 (cdr (assq 'total-height state
)))
3798 (= (window-total-size window t
)
3799 (cdr (assq 'total-width state
)))))
3800 (min-height (cdr (assq 'min-height head
)))
3801 (min-width (cdr (assq 'min-width head
)))
3802 window-splits selected
)
3803 (if (and (not totals
)
3804 (or (> min-height
(window-total-size window
))
3805 (> min-width
(window-total-size window t
)))
3807 (and (setq min-height
3808 (cdr (assq 'min-height-ignore head
)))
3810 (cdr (assq 'min-width-ignore head
)))
3811 (or (> min-height
(window-total-size window
))
3812 (> min-width
(window-total-size window t
)))
3813 (or (not (eq ignore
'safe
))
3814 (and (setq min-height
3815 (cdr (assq 'min-height-safe head
)))
3817 (cdr (assq 'min-width-safe head
)))
3819 (window-total-size window
))
3821 (window-total-size window t
))))))))
3822 ;; The check above might not catch all errors due to rounding
3823 ;; issues - so IGNORE equal 'safe might not always produce the
3824 ;; minimum possible state. But such configurations hardly make
3826 (error "Window %s too small to accommodate state" window
)
3827 (setq state
(cdr state
))
3828 (setq window-state-put-list nil
)
3829 ;; Work on the windows of a temporary buffer to make sure that
3830 ;; splitting proceeds regardless of any buffer local values of
3831 ;; `window-size-fixed'. Release that buffer after the buffers of
3832 ;; all live windows have been set by `window-state-put-2'.
3834 (set-window-buffer window
(current-buffer))
3835 (window-state-put-1 state window nil totals
)
3836 (window-state-put-2 ignore
))
3837 (window-check frame
))))
3839 (defun display-buffer-record-window (type window buffer
)
3840 "Record information for window used by `display-buffer'.
3841 TYPE specifies the type of the calling operation and must be one
3842 of the symbols 'reuse \(when WINDOW existed already and was
3843 reused for displaying BUFFER), 'window \(when WINDOW was created
3844 on an already existing frame), or 'frame \(when WINDOW was
3845 created on a new frame). WINDOW is the window used for or created
3846 by the `display-buffer' routines. BUFFER is the buffer that
3849 This function installs or updates the quit-restore parameter of
3850 WINDOW. The quit-restore parameter is a list of four elements:
3851 The first element is one of the symbols 'window, 'frame, 'same or
3852 'other. The second element is either one of the symbols 'window
3853 or 'frame or a list whose elements are the buffer previously
3854 shown in the window, that buffer's window start and window point,
3855 and the window's height. The third element is the window
3856 selected at the time the parameter was created. The fourth
3860 (if (eq (window-buffer window
) buffer
)
3861 ;; WINDOW shows BUFFER already.
3862 (when (consp (window-parameter window
'quit-restore
))
3863 ;; If WINDOW has a quit-restore parameter, reset its car.
3864 (setcar (window-parameter window
'quit-restore
) 'same
))
3865 ;; WINDOW shows another buffer.
3866 (set-window-parameter
3867 window
'quit-restore
3869 ;; A quadruple of WINDOW's buffer, start, point and height.
3870 (list (window-buffer window
) (window-start window
)
3871 (window-point-1 window
) (window-total-size window
))
3872 (selected-window) buffer
))))
3874 ;; WINDOW has been created on an existing frame.
3875 (set-window-parameter
3876 window
'quit-restore
3877 (list 'window
'window
(selected-window) buffer
)))
3879 ;; WINDOW has been created on a new frame.
3880 (set-window-parameter
3881 window
'quit-restore
3882 (list 'frame
'frame
(selected-window) buffer
)))))
3884 (defcustom display-buffer-function nil
3885 "If non-nil, function to call to handle `display-buffer'.
3886 It will receive two args, the buffer and a flag which if non-nil
3887 means that the currently selected window is not acceptable. It
3888 should choose or create a window, display the specified buffer in
3889 it, and return the window.
3891 The function specified here is responsible for setting the
3892 quit-restore and help-setup parameters of the window used."
3895 (function :tag
"function"))
3898 (defcustom pop-up-frame-alist nil
3899 "Alist of parameters for automatically generated new frames.
3900 You can set this in your init file; for example,
3902 (setq pop-up-frame-alist '((width . 80) (height . 20)))
3904 If non-nil, the value you specify here is used by the default
3905 `pop-up-frame-function' for the creation of new frames.
3907 Since `pop-up-frame-function' is used by `display-buffer' for
3908 making new frames, any value specified here by default affects
3909 the automatic generation of new frames via `display-buffer' and
3910 all functions based on it. The behavior of `make-frame' is not
3911 affected by this variable."
3912 :type
'(repeat (cons :format
"%v"
3913 (symbol :tag
"Parameter")
3914 (sexp :tag
"Value")))
3917 (defcustom pop-up-frame-function
3918 (lambda () (make-frame pop-up-frame-alist
))
3919 "Function used by `display-buffer' for creating a new frame.
3920 This function is called with no arguments and should return a new
3921 frame. The default value calls `make-frame' with the argument
3922 `pop-up-frame-alist'."
3926 (defcustom special-display-buffer-names nil
3927 "List of names of buffers that should be displayed specially.
3928 Displaying a buffer with `display-buffer' or `pop-to-buffer', if
3929 its name is in this list, displays the buffer in a way specified
3930 by `special-display-function'. `special-display-popup-frame'
3931 \(the default for `special-display-function') usually displays
3932 the buffer in a separate frame made with the parameters specified
3933 by `special-display-frame-alist'. If `special-display-function'
3934 has been set to some other function, that function is called with
3935 the buffer as first, and nil as second argument.
3937 Alternatively, an element of this list can be specified as
3938 \(BUFFER-NAME FRAME-PARAMETERS), where BUFFER-NAME is a buffer
3939 name and FRAME-PARAMETERS an alist of \(PARAMETER . VALUE) pairs.
3940 `special-display-popup-frame' will interpret such pairs as frame
3941 parameters when it creates a special frame, overriding the
3942 corresponding values from `special-display-frame-alist'.
3944 As a special case, if FRAME-PARAMETERS contains (same-window . t)
3945 `special-display-popup-frame' displays that buffer in the
3946 selected window. If FRAME-PARAMETERS contains (same-frame . t),
3947 it displays that buffer in a window on the selected frame.
3949 If `special-display-function' specifies some other function than
3950 `special-display-popup-frame', that function is called with the
3951 buffer named BUFFER-NAME as first, and FRAME-PARAMETERS as second
3954 Finally, an element of this list can be also specified as
3955 \(BUFFER-NAME FUNCTION OTHER-ARGS). In that case,
3956 `special-display-popup-frame' will call FUNCTION with the buffer
3957 named BUFFER-NAME as first argument, and OTHER-ARGS as the
3958 second. If `special-display-function' specifies some other
3959 function, that function is called with the buffer named
3960 BUFFER-NAME as first, and the element's cdr as second argument.
3961 In any case, that function is responsible for setting the value
3962 The function specified here is responsible for setting the
3963 quit-restore and help-setup parameters of the window used.
3965 If this variable appears \"not to work\", because you added a
3966 name to it but the corresponding buffer is displayed in the
3967 selected window, look at the values of `same-window-buffer-names'
3968 and `same-window-regexps'. Those variables take precedence over
3971 See also `special-display-regexps'."
3973 (choice :tag
"Buffer"
3975 (string :format
"%v")
3976 (cons :tag
"With parameters"
3979 (string :format
"%v")
3980 (repeat :tag
"Parameters"
3982 (symbol :tag
"Parameter")
3983 (sexp :tag
"Value"))))
3984 (list :tag
"With function"
3987 (string :format
"%v")
3988 (function :tag
"Function")
3989 (repeat :tag
"Arguments" (sexp)))))
3994 (put 'special-display-buffer-names
'risky-local-variable t
)
3996 (defcustom special-display-regexps nil
3997 "List of regexps saying which buffers should be displayed specially.
3998 Displaying a buffer with `display-buffer' or `pop-to-buffer', if
3999 any regexp in this list matches its name, displays it specially
4000 using `special-display-function'. `special-display-popup-frame'
4001 \(the default for `special-display-function') usually displays
4002 the buffer in a separate frame made with the parameters specified
4003 by `special-display-frame-alist'. If `special-display-function'
4004 has been set to some other function, that function is called with
4005 the buffer as first, and nil as second argument.
4007 Alternatively, an element of this list can be specified as
4008 \(REGEXP FRAME-PARAMETERS), where REGEXP is a regexp as above and
4009 FRAME-PARAMETERS an alist of (PARAMETER . VALUE) pairs.
4010 `special-display-popup-frame' will then interpret these pairs as
4011 frame parameters when creating a special frame for a buffer whose
4012 name matches REGEXP, overriding the corresponding values from
4013 `special-display-frame-alist'.
4015 As a special case, if FRAME-PARAMETERS contains (same-window . t)
4016 `special-display-popup-frame' displays buffers matching REGEXP in
4017 the selected window. \(same-frame . t) in FRAME-PARAMETERS means
4018 to display such buffers in a window on the selected frame.
4020 If `special-display-function' specifies some other function than
4021 `special-display-popup-frame', that function is called with the
4022 buffer whose name matched REGEXP as first, and FRAME-PARAMETERS
4025 Finally, an element of this list can be also specified as
4026 \(REGEXP FUNCTION OTHER-ARGS). `special-display-popup-frame'
4027 will then call FUNCTION with the buffer whose name matched
4028 REGEXP as first, and OTHER-ARGS as second argument. If
4029 `special-display-function' specifies some other function, that
4030 function is called with the buffer whose name matched REGEXP
4031 as first, and the element's cdr as second argument.
4033 If this variable appears \"not to work\", because you added a
4034 name to it but the corresponding buffer is displayed in the
4035 selected window, look at the values of `same-window-buffer-names'
4036 and `same-window-regexps'. Those variables take precedence over
4039 See also `special-display-buffer-names'."
4041 (choice :tag
"Buffer"
4043 (regexp :format
"%v")
4044 (cons :tag
"With parameters"
4047 (regexp :format
"%v")
4048 (repeat :tag
"Parameters"
4050 (symbol :tag
"Parameter")
4051 (sexp :tag
"Value"))))
4052 (list :tag
"With function"
4055 (regexp :format
"%v")
4056 (function :tag
"Function")
4057 (repeat :tag
"Arguments" (sexp)))))
4061 (defun special-display-p (buffer-name)
4062 "Return non-nil if a buffer named BUFFER-NAME gets a special frame.
4063 More precisely, return t if `special-display-buffer-names' or
4064 `special-display-regexps' contain a string entry equaling or
4065 matching BUFFER-NAME. If `special-display-buffer-names' or
4066 `special-display-regexps' contain a list entry whose car equals
4067 or matches BUFFER-NAME, the return value is the cdr of that
4071 ((not (stringp buffer-name
)))
4072 ((member buffer-name special-display-buffer-names
)
4074 ((setq tmp
(assoc buffer-name special-display-buffer-names
))
4077 (dolist (regexp special-display-regexps
)
4080 (when (string-match-p regexp buffer-name
)
4082 ((and (consp regexp
) (stringp (car regexp
))
4083 (string-match-p (car regexp
) buffer-name
))
4084 (throw 'found
(cdr regexp
))))))))))
4086 (defcustom special-display-frame-alist
4087 '((height .
14) (width .
80) (unsplittable . t
))
4088 "Alist of parameters for special frames.
4089 Special frames are used for buffers whose names are listed in
4090 `special-display-buffer-names' and for buffers whose names match
4091 one of the regular expressions in `special-display-regexps'.
4093 This variable can be set in your init file, like this:
4095 (setq special-display-frame-alist '((width . 80) (height . 20)))
4097 These supersede the values given in `default-frame-alist'."
4098 :type
'(repeat (cons :format
"%v"
4099 (symbol :tag
"Parameter")
4100 (sexp :tag
"Value")))
4103 (defun special-display-popup-frame (buffer &optional args
)
4104 "Display BUFFER and return the window chosen.
4105 If BUFFER is already displayed in a visible or iconified frame,
4106 raise that frame. Otherwise, display BUFFER in a new frame.
4108 Optional argument ARGS is a list specifying additional
4111 If ARGS is an alist, use it as a list of frame parameters. If
4112 these parameters contain \(same-window . t), display BUFFER in
4113 the selected window. If they contain \(same-frame . t), display
4114 BUFFER in a window of the selected frame.
4116 If ARGS is a list whose car is a symbol, use (car ARGS) as a
4117 function to do the work. Pass it BUFFER as first argument,
4118 and (cdr ARGS) as second."
4119 (if (and args
(symbolp (car args
)))
4120 (apply (car args
) buffer
(cdr args
))
4121 (let ((window (get-buffer-window buffer
0)))
4123 ;; If we have a window already, make it visible.
4125 (let ((frame (window-frame window
)))
4126 (make-frame-visible frame
)
4128 (display-buffer-record-window 'reuse window buffer
)
4130 ;; Reuse the current window if the user requested it.
4131 (when (cdr (assq 'same-window args
))
4133 (progn (switch-to-buffer buffer nil t
) (selected-window))
4135 ;; Stay on the same frame if requested.
4136 (when (or (cdr (assq 'same-frame args
)) (cdr (assq 'same-window args
)))
4137 (let* ((pop-up-windows t
)
4139 special-display-buffer-names special-display-regexps
)
4140 (display-buffer buffer
)))
4141 ;; If no window yet, make one in a new frame.
4143 (with-current-buffer buffer
4144 (make-frame (append args special-display-frame-alist
))))
4145 (window (frame-selected-window frame
)))
4146 (display-buffer-record-window 'frame window buffer
)
4147 (set-window-buffer window buffer
)
4148 ;; Reset list of WINDOW's previous buffers to nil.
4149 (set-window-prev-buffers window nil
)
4150 (set-window-dedicated-p window t
)
4153 (defcustom special-display-function
'special-display-popup-frame
4154 "Function to call for displaying special buffers.
4155 This function is called with two arguments - the buffer and,
4156 optionally, a list - and should return a window displaying that
4157 buffer. The default value usually makes a separate frame for the
4158 buffer using `special-display-frame-alist' to specify the frame
4159 parameters. See the definition of `special-display-popup-frame'
4160 for how to specify such a function.
4162 A buffer is special when its name is either listed in
4163 `special-display-buffer-names' or matches a regexp in
4164 `special-display-regexps'.
4166 The function specified here is responsible for setting the
4167 quit-restore and help-setup parameters of the window used."
4171 (defcustom same-window-buffer-names nil
4172 "List of names of buffers that should appear in the \"same\" window.
4173 `display-buffer' and `pop-to-buffer' show a buffer whose name is
4174 on this list in the selected rather than some other window.
4176 An element of this list can be a cons cell instead of just a
4177 string. In that case, the cell's car must be a string specifying
4178 the buffer name. This is for compatibility with
4179 `special-display-buffer-names'; the cdr of the cons cell is
4182 See also `same-window-regexps'."
4183 :type
'(repeat (string :format
"%v"))
4186 (defcustom same-window-regexps nil
4187 "List of regexps saying which buffers should appear in the \"same\" window.
4188 `display-buffer' and `pop-to-buffer' show a buffer whose name
4189 matches a regexp on this list in the selected rather than some
4192 An element of this list can be a cons cell instead of just a
4193 string. In that case, the cell's car must be a regexp matching
4194 the buffer name. This is for compatibility with
4195 `special-display-regexps'; the cdr of the cons cell is ignored.
4197 See also `same-window-buffer-names'."
4198 :type
'(repeat (regexp :format
"%v"))
4201 (defun same-window-p (buffer-name)
4202 "Return non-nil if a buffer named BUFFER-NAME would be shown in the \"same\" window.
4203 This function returns non-nil if `display-buffer' or
4204 `pop-to-buffer' would show a buffer named BUFFER-NAME in the
4205 selected rather than \(as usual\) some other window. See
4206 `same-window-buffer-names' and `same-window-regexps'."
4208 ((not (stringp buffer-name
)))
4209 ;; The elements of `same-window-buffer-names' can be buffer
4210 ;; names or cons cells whose cars are buffer names.
4211 ((member buffer-name same-window-buffer-names
))
4212 ((assoc buffer-name same-window-buffer-names
))
4214 (dolist (regexp same-window-regexps
)
4215 ;; The elements of `same-window-regexps' can be regexps
4216 ;; or cons cells whose cars are regexps.
4217 (when (or (and (stringp regexp
)
4218 (string-match regexp buffer-name
))
4219 (and (consp regexp
) (stringp (car regexp
))
4220 (string-match-p (car regexp
) buffer-name
)))
4221 (throw 'found t
)))))))
4223 (defcustom pop-up-frames nil
4224 "Whether `display-buffer' should make a separate frame.
4225 If nil, never make a separate frame.
4226 If the value is `graphic-only', make a separate frame
4227 on graphic displays only.
4228 Any other non-nil value means always make a separate frame."
4230 (const :tag
"Never" nil
)
4231 (const :tag
"On graphic displays only" graphic-only
)
4232 (const :tag
"Always" t
))
4235 (defcustom display-buffer-reuse-frames nil
4236 "Non-nil means `display-buffer' should reuse frames.
4237 If the buffer in question is already displayed in a frame, raise
4243 (defcustom pop-up-windows t
4244 "Non-nil means `display-buffer' should make a new window."
4248 (defcustom split-window-preferred-function
'split-window-sensibly
4249 "Function called by `display-buffer' routines to split a window.
4250 This function is called with a window as single argument and is
4251 supposed to split that window and return the new window. If the
4252 window can (or shall) not be split, it is supposed to return nil.
4253 The default is to call the function `split-window-sensibly' which
4254 tries to split the window in a way which seems most suitable.
4255 You can customize the options `split-height-threshold' and/or
4256 `split-width-threshold' in order to have `split-window-sensibly'
4257 prefer either vertical or horizontal splitting.
4259 If you set this to any other function, bear in mind that the
4260 `display-buffer' routines may call this function two times. The
4261 argument of the first call is the largest window on its frame.
4262 If that call fails to return a live window, the function is
4263 called again with the least recently used window as argument. If
4264 that call fails too, `display-buffer' will use an existing window
4265 to display its buffer.
4267 The window selected at the time `display-buffer' was invoked is
4268 still selected when this function is called. Hence you can
4269 compare the window argument with the value of `selected-window'
4270 if you intend to split the selected window instead or if you do
4271 not want to split the selected window."
4276 (defcustom split-height-threshold
80
4277 "Minimum height for splitting windows sensibly.
4278 If this is an integer, `split-window-sensibly' may split a window
4279 vertically only if it has at least this many lines. If this is
4280 nil, `split-window-sensibly' is not allowed to split a window
4281 vertically. If, however, a window is the only window on its
4282 frame, `split-window-sensibly' may split it vertically
4283 disregarding the value of this variable."
4284 :type
'(choice (const nil
) (integer :tag
"lines"))
4288 (defcustom split-width-threshold
160
4289 "Minimum width for splitting windows sensibly.
4290 If this is an integer, `split-window-sensibly' may split a window
4291 horizontally only if it has at least this many columns. If this
4292 is nil, `split-window-sensibly' is not allowed to split a window
4294 :type
'(choice (const nil
) (integer :tag
"columns"))
4298 (defun window-splittable-p (window &optional horizontal
)
4299 "Return non-nil if `split-window-sensibly' may split WINDOW.
4300 Optional argument HORIZONTAL nil or omitted means check whether
4301 `split-window-sensibly' may split WINDOW vertically. HORIZONTAL
4302 non-nil means check whether WINDOW may be split horizontally.
4304 WINDOW may be split vertically when the following conditions
4306 - `window-size-fixed' is either nil or equals `width' for the
4308 - `split-height-threshold' is an integer and WINDOW is at least as
4309 high as `split-height-threshold'.
4310 - When WINDOW is split evenly, the emanating windows are at least
4311 `window-min-height' lines tall and can accommodate at least one
4312 line plus - if WINDOW has one - a mode line.
4314 WINDOW may be split horizontally when the following conditions
4316 - `window-size-fixed' is either nil or equals `height' for the
4318 - `split-width-threshold' is an integer and WINDOW is at least as
4319 wide as `split-width-threshold'.
4320 - When WINDOW is split evenly, the emanating windows are at least
4321 `window-min-width' or two (whichever is larger) columns wide."
4322 (when (window-live-p window
)
4323 (with-current-buffer (window-buffer window
)
4325 ;; A window can be split horizontally when its width is not
4326 ;; fixed, it is at least `split-width-threshold' columns wide
4327 ;; and at least twice as wide as `window-min-width' and 2 (the
4328 ;; latter value is hardcoded).
4329 (and (memq window-size-fixed
'(nil height
))
4330 ;; Testing `window-full-width-p' here hardly makes any
4331 ;; sense nowadays. This can be done more intuitively by
4332 ;; setting up `split-width-threshold' appropriately.
4333 (numberp split-width-threshold
)
4334 (>= (window-width window
)
4335 (max split-width-threshold
4336 (* 2 (max window-min-width
2)))))
4337 ;; A window can be split vertically when its height is not
4338 ;; fixed, it is at least `split-height-threshold' lines high,
4339 ;; and it is at least twice as high as `window-min-height' and 2
4340 ;; if it has a modeline or 1.
4341 (and (memq window-size-fixed
'(nil width
))
4342 (numberp split-height-threshold
)
4343 (>= (window-height window
)
4344 (max split-height-threshold
4345 (* 2 (max window-min-height
4346 (if mode-line-format
2 1))))))))))
4348 (defun split-window-sensibly (window)
4349 "Split WINDOW in a way suitable for `display-buffer'.
4350 If `split-height-threshold' specifies an integer, WINDOW is at
4351 least `split-height-threshold' lines tall and can be split
4352 vertically, split WINDOW into two windows one above the other and
4353 return the lower window. Otherwise, if `split-width-threshold'
4354 specifies an integer, WINDOW is at least `split-width-threshold'
4355 columns wide and can be split horizontally, split WINDOW into two
4356 windows side by side and return the window on the right. If this
4357 can't be done either and WINDOW is the only window on its frame,
4358 try to split WINDOW vertically disregarding any value specified
4359 by `split-height-threshold'. If that succeeds, return the lower
4360 window. Return nil otherwise.
4362 By default `display-buffer' routines call this function to split
4363 the largest or least recently used window. To change the default
4364 customize the option `split-window-preferred-function'.
4366 You can enforce this function to not split WINDOW horizontally,
4367 by setting \(or binding) the variable `split-width-threshold' to
4368 nil. If, in addition, you set `split-height-threshold' to zero,
4369 chances increase that this function does split WINDOW vertically.
4371 In order to not split WINDOW vertically, set \(or bind) the
4372 variable `split-height-threshold' to nil. Additionally, you can
4373 set `split-width-threshold' to zero to make a horizontal split
4374 more likely to occur.
4376 Have a look at the function `window-splittable-p' if you want to
4377 know how `split-window-sensibly' determines whether WINDOW can be
4379 (or (and (window-splittable-p window
)
4380 ;; Split window vertically.
4381 (with-selected-window window
4382 (split-window-vertically)))
4383 (and (window-splittable-p window t
)
4384 ;; Split window horizontally.
4385 (with-selected-window window
4386 (split-window-horizontally)))
4387 (and (eq window
(frame-root-window (window-frame window
)))
4388 (not (window-minibuffer-p window
))
4389 ;; If WINDOW is the only window on its frame and is not the
4390 ;; minibuffer window, try to split it vertically disregarding
4391 ;; the value of `split-height-threshold'.
4392 (let ((split-height-threshold 0))
4393 (when (window-splittable-p window
)
4394 (with-selected-window window
4395 (split-window-vertically)))))))
4397 (defun window--try-to-split-window (window)
4398 "Try to split WINDOW.
4399 Return value returned by `split-window-preferred-function' if it
4400 represents a live window, nil otherwise."
4401 (and (window-live-p window
)
4402 (not (frame-parameter (window-frame window
) 'unsplittable
))
4404 ;; Since `split-window-preferred-function' might
4405 ;; throw an error use `condition-case'.
4407 (funcall split-window-preferred-function window
)
4409 (and (window-live-p new-window
) new-window
))))
4411 (defun window--frame-usable-p (frame)
4412 "Return FRAME if it can be used to display a buffer."
4413 (when (frame-live-p frame
)
4414 (let ((window (frame-root-window frame
)))
4415 ;; `frame-root-window' may be an internal window which is considered
4416 ;; "dead" by `window-live-p'. Hence if `window' is not live we
4417 ;; implicitly know that `frame' has a visible window we can use.
4418 (unless (and (window-live-p window
)
4419 (or (window-minibuffer-p window
)
4420 ;; If the window is soft-dedicated, the frame is usable.
4421 ;; Actually, even if the window is really dedicated,
4422 ;; the frame is still usable by splitting it.
4423 ;; At least Emacs-22 allowed it, and it is desirable
4424 ;; when displaying same-frame windows.
4425 nil
; (eq t (window-dedicated-p window))
4429 (defcustom even-window-heights t
4430 "If non-nil `display-buffer' will try to even window heights.
4431 Otherwise `display-buffer' will leave the window configuration
4432 alone. Heights are evened only when `display-buffer' chooses a
4433 window that appears above or below the selected window."
4437 (defun window--even-window-heights (window)
4438 "Even heights of WINDOW and selected window.
4439 Do this only if these windows are vertically adjacent to each
4440 other, `even-window-heights' is non-nil, and the selected window
4441 is higher than WINDOW."
4442 (when (and even-window-heights
4443 (not (eq window
(selected-window)))
4444 ;; Don't resize minibuffer windows.
4445 (not (window-minibuffer-p (selected-window)))
4446 (> (window-height (selected-window)) (window-height window
))
4447 (eq (window-frame window
) (window-frame (selected-window)))
4448 (let ((sel-edges (window-edges (selected-window)))
4449 (win-edges (window-edges window
)))
4450 (and (= (nth 0 sel-edges
) (nth 0 win-edges
))
4451 (= (nth 2 sel-edges
) (nth 2 win-edges
))
4452 (or (= (nth 1 sel-edges
) (nth 3 win-edges
))
4453 (= (nth 3 sel-edges
) (nth 1 win-edges
))))))
4454 (let ((window-min-height 1))
4455 ;; Don't throw an error if we can't even window heights for
4458 (enlarge-window (/ (- (window-height window
) (window-height)) 2))
4461 (defun window--display-buffer-1 (window)
4462 "Raise the frame containing WINDOW.
4463 Do not raise the selected frame. Return WINDOW."
4464 (let* ((frame (window-frame window
))
4465 (visible (frame-visible-p frame
)))
4466 (unless (or (not visible
)
4467 ;; Assume the selected frame is already visible enough.
4468 (eq frame
(selected-frame))
4469 ;; Assume the frame from which we invoked the minibuffer
4471 (and (minibuffer-window-active-p (selected-window))
4472 (eq frame
(window-frame (minibuffer-selected-window)))))
4473 (raise-frame frame
))
4476 (defun window--display-buffer-2 (buffer window
&optional dedicated
)
4477 "Display BUFFER in WINDOW and make its frame visible.
4478 Set `window-dedicated-p' to DEDICATED if non-nil.
4480 (when (and (buffer-live-p buffer
) (window-live-p window
))
4481 (set-window-buffer window buffer
)
4483 (set-window-dedicated-p window dedicated
))
4484 (window--display-buffer-1 window
)))
4486 (defvar display-buffer-mark-dedicated nil
4487 "If non-nil, `display-buffer' marks the windows it creates as dedicated.
4488 The actual non-nil value of this variable will be copied to the
4489 `window-dedicated-p' flag.")
4491 (defun window-normalize-buffer-to-display (buffer-or-name)
4492 "Normalize BUFFER-OR-NAME argument for buffer display functions.
4493 If BUFFER-OR-NAME is nil, return the curent buffer. Else, if a
4494 buffer specified by BUFFER-OR-NAME exists, return that buffer.
4495 If no such buffer exists, create a buffer with the name
4496 BUFFER-OR-NAME and return that buffer."
4498 (or (get-buffer buffer-or-name
)
4499 (let ((buffer (get-buffer-create buffer-or-name
)))
4500 (set-buffer-major-mode buffer
)
4504 (defconst display-buffer--action-function-custom-type
4505 '(choice :tag
"Function"
4506 (const :tag
"--" ignore
) ; default for insertion
4507 (const display-buffer-reuse-window
)
4508 (const display-buffer-use-some-window
)
4509 (const display-buffer-same-window
)
4510 (const display-buffer-pop-up-frame
)
4511 (const display-buffer-use-some-window
)
4512 (function :tag
"Other function"))
4513 "Custom type for `display-buffer' action functions.")
4515 (defconst display-buffer--action-custom-type
4516 `(cons :tag
"Action"
4517 (choice :tag
"Action functions"
4518 ,display-buffer--action-function-custom-type
4520 :tag
"List of functions"
4521 ,display-buffer--action-function-custom-type
))
4522 (alist :tag
"Action arguments"
4524 :value-type
(sexp :tag
"Value")))
4525 "Custom type for `display-buffer' actions.")
4527 (defvar display-buffer-overriding-action
'(nil . nil
)
4528 "Overriding action to perform to display a buffer.
4529 It should be a cons cell (FUNCTION . ALIST), where FUNCTION is a
4530 function or a list of functions. Each function should accept 2
4531 arguments: a buffer to display and an alist similar to ALIST.
4532 See `display-buffer' for details.")
4533 (put 'display-buffer-overriding-action
'risky-local-variable t
)
4535 (defcustom display-buffer-alist nil
4536 "Alist of conditional actions for `display-buffer'.
4537 This is a list of elements (CONDITION . ACTION), where:
4539 CONDITION is either a regexp matching buffer names, or a function
4540 that takes a buffer and returns a boolean.
4542 ACTION is a cons cell (FUNCTION . ALIST), where FUNCTION is a
4543 function or a list of functions. Each such function should
4544 accept 2 arguments: a buffer to display and an alist of the
4545 same form as ALIST. See `display-buffer' for details."
4546 :type
`(alist :key-type
4547 (choice :tag
"Condition"
4549 (function :tag
"Matcher function"))
4550 :value-type
,display-buffer--action-custom-type
)
4555 (defcustom display-buffer-base-action
'(nil . nil
)
4556 "User-specified default action for `display-buffer'.
4557 It should be a cons cell (FUNCTION . ALIST), where FUNCTION is a
4558 function or a list of functions. Each function should accept 2
4559 arguments: a buffer to display and an alist similar to ALIST.
4560 See `display-buffer' for details."
4561 :type display-buffer--action-custom-type
4566 (defconst display-buffer-fallback-action
4567 '((display-buffer--maybe-same-window
4568 display-buffer-reuse-window
4569 display-buffer--special
4570 display-buffer--maybe-pop-up-frame-or-window
4571 display-buffer-use-some-window
4572 ;; If all else fails, pop up a new frame.
4573 display-buffer-pop-up-frame
))
4574 "Default fallback action for `display-buffer'.
4575 This is the action used by `display-buffer' if no other actions
4576 specified, e.g. by the user options `display-buffer-alist' or
4577 `display-buffer-base-action'. See `display-buffer'.")
4578 (put 'display-buffer-fallback-action
'risky-local-variable t
)
4580 (defun display-buffer-assq-regexp (buffer-name alist
)
4581 "Retrieve ALIST entry corresponding to BUFFER-NAME."
4583 (dolist (entry alist
)
4584 (let ((key (car entry
))
4585 (value (cdr entry
)))
4586 (when (or (and (stringp key
)
4587 (string-match-p key buffer-name
))
4588 (and (symbolp key
) (functionp key
)
4589 (funcall key buffer-name alist
)))
4590 (throw 'match
(cdr entry
)))))))
4592 (defvar display-buffer--same-window-action
4593 '(display-buffer-same-window
4594 (inhibit-same-window . nil
))
4595 "A `display-buffer' action for displaying in the same window.")
4596 (put 'display-buffer--same-window-action
'risky-local-variable t
)
4598 (defvar display-buffer--other-frame-action
4599 '((display-buffer-reuse-window
4600 display-buffer--special
4601 display-buffer-pop-up-frame
)
4602 (reusable-frames .
0)
4603 (inhibit-same-window . t
))
4604 "A `display-buffer' action for displaying in another frame.")
4605 (put 'display-buffer--other-frame-action
'risky-local-variable t
)
4607 (defun display-buffer (&optional buffer-or-name action frame
)
4608 "Display BUFFER-OR-NAME in some window, without selecting it.
4609 BUFFER-OR-NAME must be a buffer or the name of an existing
4610 buffer. Return the window chosen for displaying BUFFER-OR-NAME,
4611 or nil if no such window is found.
4613 Optional argument ACTION should have the form (FUNCTION . ALIST).
4614 FUNCTION is either a function or a list of functions. Each such
4615 function is called with 2 arguments: the buffer to display and an
4616 alist. It should either display the buffer and return the
4617 window, or return nil if unable to display the buffer.
4619 The `display-buffer' function builds a function list and an alist
4620 from `display-buffer-overriding-action', `display-buffer-alist',
4621 the ACTION argument, `display-buffer-base-action', and
4622 `display-buffer-fallback-action' (in that order). Then it calls
4623 each function in the combined function list in turn, passing the
4624 buffer as the first argument and the combined alist as the second
4625 argument, until one of the functions returns non-nil.
4627 Available action functions include:
4628 `display-buffer-same-window'
4629 `display-buffer-reuse-window'
4630 `display-buffer-pop-up-frame'
4631 `display-buffer-pop-up-window'
4632 `display-buffer-use-some-window'
4634 Recognized alist entries include:
4636 `inhibit-same-window' -- A non-nil value prevents the same
4637 window from being used for display.
4639 `reusable-frames' -- Value specifies frame(s) to search for a
4640 window that already displays the buffer.
4641 See `display-buffer-reuse-window'.
4643 The ACTION argument to `display-buffer' can also have a non-nil
4644 and non-list value. This means to display the buffer in a window
4645 other than the selected one, even if it is already displayed in
4646 the selected window. If called interactively with a prefix
4647 argument, ACTION is t.
4649 Optional argument FRAME, if non-nil, acts like an additional
4650 ALIST entry (reusable-frames . FRAME), specifying the frame(s) to
4651 search for a window that is already displaying the buffer. See
4652 `display-buffer-reuse-window'."
4653 (interactive (list (read-buffer "Display buffer: " (other-buffer))
4654 (if current-prefix-arg t
)))
4655 (let ((buffer (window-normalize-buffer-to-display buffer-or-name
))
4656 ;; Handle the old form of the first argument.
4657 (inhibit-same-window (and action
(not (listp action
)))))
4658 (unless (listp action
) (setq action nil
))
4659 (if display-buffer-function
4660 ;; If `display-buffer-function' is defined, let it do the job.
4661 (funcall display-buffer-function buffer inhibit-same-window
)
4662 ;; Otherwise, use the defined actions.
4664 (display-buffer-assq-regexp (buffer-name buffer
)
4665 display-buffer-alist
))
4666 ;; Extra actions from the arguments to this function:
4668 (cons nil
(append (if inhibit-same-window
4669 '((inhibit-same-window . t
)))
4671 `((reusable-frames .
,frame
))))))
4672 ;; Construct action function list and action alist.
4673 (actions (list display-buffer-overriding-action
4674 user-action action extra-action
4675 display-buffer-base-action
4676 display-buffer-fallback-action
))
4677 (functions (apply 'append
4680 (if (functionp x
) (list x
) x
))
4682 (alist (apply 'append
(mapcar 'cdr actions
)))
4684 (unless (buffer-live-p buffer
)
4685 (error "Invalid buffer"))
4686 (while (and functions
(not window
))
4687 (setq window
(funcall (car functions
) buffer alist
)
4688 functions
(cdr functions
)))
4691 (defun display-buffer-other-frame (buffer)
4692 "Display buffer BUFFER in another frame.
4693 This uses the function `display-buffer' as a subroutine; see
4694 its documentation for additional customization information."
4695 (interactive "BDisplay buffer in other frame: ")
4696 (display-buffer buffer display-buffer--other-frame-action t
))
4698 ;;; `display-buffer' action functions:
4700 (defun display-buffer-same-window (buffer alist
)
4701 "Display BUFFER in the selected window.
4702 This fails if ALIST has a non-nil `inhibit-same-window' entry, or
4703 if the selected window is a minibuffer window or is dedicated to
4704 another buffer; in that case, return nil. Otherwise, return the
4706 (unless (or (cdr (assq 'inhibit-same-window alist
))
4707 (window-minibuffer-p)
4708 (window-dedicated-p))
4709 (display-buffer-record-window 'reuse
(selected-window) buffer
)
4710 (window--display-buffer-2 buffer
(selected-window))))
4712 (defun display-buffer--maybe-same-window (buffer alist
)
4713 "Conditionally display BUFFER in the selected window.
4714 If `same-window-p' returns non-nil for BUFFER's name, call
4715 `display-buffer-same-window' and return its value. Otherwise,
4717 (and (same-window-p (buffer-name buffer
))
4718 (display-buffer-same-window buffer alist
)))
4720 (defun display-buffer-reuse-window (buffer alist
)
4721 "Return a window that is already displaying BUFFER.
4722 Return nil if no usable window is found.
4724 If ALIST has a non-nil `inhibit-same-window' entry, the selected
4725 window is not eligible for reuse.
4727 If ALIST contains a `reusable-frames' entry, its value determines
4728 which frames to search for a reusable window:
4729 nil -- the selected frame (actually the last non-minibuffer frame)
4730 A frame -- just that frame
4731 `visible' -- all visible frames
4732 0 -- all frames on the current terminal
4735 If ALIST contains no `reusable-frames' entry, search just the
4736 selected frame if `display-buffer-reuse-frames' and
4737 `pop-up-frames' are both nil; search all frames on the current
4738 terminal if either of those variables is non-nil."
4739 (let* ((alist-entry (assq 'reusable-frames alist
))
4740 (frames (cond (alist-entry (cdr alist-entry
))
4741 ((if (eq pop-up-frames
'graphic-only
)
4745 (display-buffer-reuse-frames 0)
4746 (t (last-nonminibuffer-frame))))
4747 (window (if (and (eq buffer
(window-buffer))
4748 (not (cdr (assq 'inhibit-same-window alist
))))
4750 (car (delq (selected-window)
4751 (get-buffer-window-list buffer
'nomini
4754 (display-buffer-record-window 'reuse window buffer
)
4755 (window--display-buffer-1 window
))))
4757 (defun display-buffer--special (buffer alist
)
4758 "Try to display BUFFER using `special-display-function'.
4759 Call `special-display-p' on BUFFER's name, and if that returns
4760 non-nil, call `special-display-function' on BUFFER."
4761 (and special-display-function
4762 ;; `special-display-p' returns either t or a list of frame
4763 ;; parameters to pass to `special-display-function'.
4764 (let ((pars (special-display-p (buffer-name buffer
))))
4766 (funcall special-display-function
4767 buffer
(if (listp pars
) pars
))))))
4769 (defun display-buffer-pop-up-frame (buffer alist
)
4770 "Display BUFFER in a new frame.
4771 This works by calling `pop-up-frame-function'. If successful,
4772 return the window used; otherwise return nil."
4773 (let ((fun pop-up-frame-function
)
4776 (setq frame
(funcall fun
))
4777 (setq window
(frame-selected-window frame
)))
4778 (display-buffer-record-window 'frame window buffer
)
4779 (window--display-buffer-2 buffer window display-buffer-mark-dedicated
)
4780 ;; Reset list of WINDOW's previous buffers to nil.
4781 (set-window-prev-buffers window nil
)
4784 (defun display-buffer-pop-up-window (buffer alist
)
4785 "Display BUFFER by popping up a new window.
4786 The new window is created on the selected frame, or in
4787 `last-nonminibuffer-frame' if no windows can be created there.
4788 If sucessful, return the new window; otherwise return nil."
4789 (let ((frame (or (window--frame-usable-p (selected-frame))
4790 (window--frame-usable-p (last-nonminibuffer-frame))))
4792 (when (and (or (not (frame-parameter frame
'unsplittable
))
4793 ;; If the selected frame cannot be split, look at
4794 ;; `last-nonminibuffer-frame'.
4795 (and (eq frame
(selected-frame))
4796 (setq frame
(last-nonminibuffer-frame))
4797 (window--frame-usable-p frame
)
4798 (not (frame-parameter frame
'unsplittable
))))
4799 ;; Attempt to split largest or least recently used window.
4800 (setq window
(or (window--try-to-split-window
4801 (get-largest-window frame t
))
4802 (window--try-to-split-window
4803 (get-lru-window frame t
)))))
4804 (display-buffer-record-window 'window window buffer
)
4805 (window--display-buffer-2 buffer window display-buffer-mark-dedicated
)
4806 ;; Reset list of WINDOW's previous buffers to nil.
4807 (set-window-prev-buffers window nil
)
4810 (defun display-buffer--maybe-pop-up-frame-or-window (buffer alist
)
4811 "Try displaying BUFFER based on `pop-up-frames' or `pop-up-windows'.
4813 If `pop-up-frames' is non-nil (and not `graphic-only' on a
4814 text-only terminal), try with `display-buffer-pop-up-frame'.
4816 If that cannot be done, and `pop-up-windows' is non-nil, try
4817 again with `display-buffer-pop-up-window'."
4818 (or (and (if (eq pop-up-frames
'graphic-only
)
4821 (display-buffer-pop-up-frame buffer alist
))
4823 (display-buffer-pop-up-window buffer alist
))))
4825 (defun display-buffer-use-some-window (buffer alist
)
4826 "Display BUFFER in an existing window.
4827 Search for a usable window, set that window to the buffer, and
4828 return the window. If no suitable window is found, return nil."
4829 (let* ((not-this-window (cdr (assq 'inhibit-same-window alist
)))
4830 (window-to-undedicate
4831 ;; When NOT-THIS-WINDOW is non-nil, temporarily dedicate the
4832 ;; selected window to its buffer, to prevent any of the
4833 ;; `get-' routines below from choosing it. (Bug#1415)
4834 (and not-this-window
(not (window-dedicated-p))
4835 (set-window-dedicated-p (selected-window) t
)
4837 (frame (or (window--frame-usable-p (selected-frame))
4838 (window--frame-usable-p (last-nonminibuffer-frame))))
4842 ;; Reuse an existing window.
4843 (or (get-lru-window frame
)
4844 (let ((window (get-buffer-window buffer
'visible
)))
4845 (unless (and not-this-window
4846 (eq window
(selected-window)))
4848 (get-largest-window 'visible
)
4849 (let ((window (get-buffer-window buffer
0)))
4850 (unless (and not-this-window
4851 (eq window
(selected-window)))
4853 (get-largest-window 0)))
4854 (when (window-live-p window-to-undedicate
)
4855 ;; Restore dedicated status of selected window.
4856 (set-window-dedicated-p window-to-undedicate nil
)))
4858 (display-buffer-record-window 'reuse window buffer
)
4859 (window--even-window-heights window
)
4860 (window--display-buffer-2 buffer window
))))
4862 ;;; Display + selection commands:
4864 (defun pop-to-buffer (buffer &optional action norecord
)
4865 "Select buffer BUFFER in some window, preferably a different one.
4866 BUFFER may be a buffer, a string (a buffer name), or nil. If it
4867 is a string not naming an existent buffer, create a buffer with
4868 that name. If BUFFER is nil, choose some other buffer. Return
4871 This uses `display-buffer' as a subroutine. The optional ACTION
4872 argument is passed to `display-buffer' as its ACTION argument.
4873 See `display-buffer' for more information. ACTION is t if called
4874 interactively with a prefix argument, which means to pop to a
4875 window other than the selected one even if the buffer is already
4876 displayed in the selected window.
4878 If the window to show BUFFER is not on the selected
4879 frame, raise that window's frame and give it input focus.
4881 Optional third arg NORECORD non-nil means do not put this buffer
4882 at the front of the list of recently selected ones."
4883 (interactive (list (read-buffer "Pop to buffer: " (other-buffer))
4884 (if current-prefix-arg t
)))
4885 (setq buffer
(window-normalize-buffer-to-switch-to buffer
))
4887 (let* ((old-window (selected-window))
4888 (old-frame (selected-frame))
4889 (window (display-buffer buffer action
))
4890 (frame (window-frame window
)))
4891 ;; If we chose another frame, make sure it gets input focus.
4892 (unless (eq frame old-frame
)
4893 (select-frame-set-input-focus frame norecord
))
4894 ;; Make sure new window is selected (Bug#8615), (Bug#6954).
4895 (select-window window norecord
)
4898 (defun pop-to-buffer-same-window (buffer &optional norecord
)
4899 "Select buffer BUFFER in some window, preferably the same one.
4900 This function behaves much like `switch-to-buffer', except it
4901 displays with `special-display-function' if BUFFER has a match in
4902 `special-display-buffer-names' or `special-display-regexps'.
4904 Unlike `pop-to-buffer', this function prefers using the selected
4905 window over popping up a new window or frame.
4907 BUFFER may be a buffer, a string (a buffer name), or nil. If it
4908 is a string not naming an existent buffer, create a buffer with
4909 that name. If BUFFER is nil, choose some other buffer. Return
4912 NORECORD, if non-nil means do not put this buffer at the front of
4913 the list of recently selected ones."
4914 (pop-to-buffer buffer
4915 '((display-buffer--special
4916 display-buffer-same-window
)
4917 (inhibit-same-window . nil
))
4920 (defun read-buffer-to-switch (prompt)
4921 "Read the name of a buffer to switch to, prompting with PROMPT.
4922 Return the neame of the buffer as a string.
4924 This function is intended for the `switch-to-buffer' family of
4925 commands since these need to omit the name of the current buffer
4926 from the list of completions and default values."
4927 (let ((rbts-completion-table (internal-complete-buffer-except)))
4928 (minibuffer-with-setup-hook
4930 (setq minibuffer-completion-table rbts-completion-table
)
4931 ;; Since rbts-completion-table is built dynamically, we
4932 ;; can't just add it to the default value of
4933 ;; icomplete-with-completion-tables, so we add it
4935 (if (and (boundp 'icomplete-with-completion-tables
)
4936 (listp icomplete-with-completion-tables
))
4937 (set (make-local-variable 'icomplete-with-completion-tables
)
4938 (cons rbts-completion-table
4939 icomplete-with-completion-tables
))))
4940 (read-buffer prompt
(other-buffer (current-buffer))
4941 (confirm-nonexistent-file-or-buffer)))))
4943 (defun window-normalize-buffer-to-switch-to (buffer-or-name)
4944 "Normalize BUFFER-OR-NAME argument of buffer switching functions.
4945 If BUFFER-OR-NAME is nil, return the buffer returned by
4946 `other-buffer'. Else, if a buffer specified by BUFFER-OR-NAME
4947 exists, return that buffer. If no such buffer exists, create a
4948 buffer with the name BUFFER-OR-NAME and return that buffer."
4950 (or (get-buffer buffer-or-name
)
4951 (let ((buffer (get-buffer-create buffer-or-name
)))
4952 (set-buffer-major-mode buffer
)
4956 (defun switch-to-buffer (buffer-or-name &optional norecord force-same-window
)
4957 "Switch to buffer BUFFER-OR-NAME in the selected window.
4958 If called interactively, prompt for the buffer name using the
4959 minibuffer. The variable `confirm-nonexistent-file-or-buffer'
4960 determines whether to request confirmation before creating a new
4963 BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or
4964 nil. If BUFFER-OR-NAME is a string that does not identify an
4965 existing buffer, create a buffer with that name. If
4966 BUFFER-OR-NAME is nil, switch to the buffer returned by
4969 Optional argument NORECORD non-nil means do not put the buffer
4970 specified by BUFFER-OR-NAME at the front of the buffer list and
4971 do not make the window displaying it the most recently selected
4974 If FORCE-SAME-WINDOW is non-nil, BUFFER-OR-NAME must be displayed
4975 in the selected window; signal an error if that is
4976 impossible (e.g. if the selected window is minibuffer-only). If
4977 non-nil, BUFFER-OR-NAME may be displayed in another window.
4979 Return the buffer switched to."
4981 (list (read-buffer-to-switch "Switch to buffer: ") nil nil
))
4982 (let ((buffer (window-normalize-buffer-to-switch-to buffer-or-name
)))
4983 (if (null force-same-window
)
4984 (pop-to-buffer buffer display-buffer--same-window-action norecord
)
4986 ;; Don't call set-window-buffer if it's not needed since it
4987 ;; might signal an error (e.g. if the window is dedicated).
4988 ((eq buffer
(window-buffer)))
4989 ((window-minibuffer-p)
4990 (error "Cannot switch buffers in minibuffer window"))
4991 ((eq (window-dedicated-p) t
)
4992 (error "Cannot switch buffers in a dedicated window"))
4993 (t (set-window-buffer nil buffer
)))
4996 (select-window (selected-window)))
4997 (set-buffer buffer
))))
4999 (defun switch-to-buffer-other-window (buffer-or-name &optional norecord
)
5000 "Select the buffer specified by BUFFER-OR-NAME in another window.
5001 BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or
5002 nil. Return the buffer switched to.
5004 If called interactively, prompt for the buffer name using the
5005 minibuffer. The variable `confirm-nonexistent-file-or-buffer'
5006 determines whether to request confirmation before creating a new
5009 If BUFFER-OR-NAME is a string and does not identify an existing
5010 buffer, create a new buffer with that name. If BUFFER-OR-NAME is
5011 nil, switch to the buffer returned by `other-buffer'.
5013 Optional second argument NORECORD non-nil means do not put this
5014 buffer at the front of the list of recently selected ones.
5016 This uses the function `display-buffer' as a subroutine; see its
5017 documentation for additional customization information."
5019 (list (read-buffer-to-switch "Switch to buffer in other window: ")))
5020 (let ((pop-up-windows t
))
5021 (pop-to-buffer buffer-or-name t norecord
)))
5023 (defun switch-to-buffer-other-frame (buffer-or-name &optional norecord
)
5024 "Switch to buffer BUFFER-OR-NAME in another frame.
5025 BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or
5026 nil. Return the buffer switched to.
5028 If called interactively, prompt for the buffer name using the
5029 minibuffer. The variable `confirm-nonexistent-file-or-buffer'
5030 determines whether to request confirmation before creating a new
5033 If BUFFER-OR-NAME is a string and does not identify an existing
5034 buffer, create a new buffer with that name. If BUFFER-OR-NAME is
5035 nil, switch to the buffer returned by `other-buffer'.
5037 Optional second arg NORECORD non-nil means do not put this
5038 buffer at the front of the list of recently selected ones.
5040 This uses the function `display-buffer' as a subroutine; see its
5041 documentation for additional customization information."
5043 (list (read-buffer-to-switch "Switch to buffer in other frame: ")))
5044 (pop-to-buffer buffer-or-name display-buffer--other-frame-action norecord
))
5046 (defun set-window-text-height (window height
)
5047 "Set the height in lines of the text display area of WINDOW to HEIGHT.
5048 WINDOW must be a live window. HEIGHT doesn't include the mode
5049 line or header line, if any, or any partial-height lines in the
5052 Note that the current implementation of this function cannot
5053 always set the height exactly, but attempts to be conservative,
5054 by allocating more lines than are actually needed in the case
5055 where some error may be present."
5056 (setq window
(window-normalize-live-window window
))
5057 (let ((delta (- height
(window-text-height window
))))
5058 (unless (zerop delta
)
5059 ;; Setting window-min-height to a value like 1 can lead to very
5060 ;; bizarre displays because it also allows Emacs to make *other*
5061 ;; windows 1-line tall, which means that there's no more space for
5063 (let ((window-min-height (min 2 height
))) ; One text line plus a modeline.
5064 (window-resize window delta
)))))
5066 (defun enlarge-window-horizontally (delta)
5067 "Make selected window DELTA columns wider.
5068 Interactively, if no argument is given, make selected window one
5071 (enlarge-window delta t
))
5073 (defun shrink-window-horizontally (delta)
5074 "Make selected window DELTA columns narrower.
5075 Interactively, if no argument is given, make selected window one
5078 (shrink-window delta t
))
5080 (defun count-screen-lines (&optional beg end count-final-newline window
)
5081 "Return the number of screen lines in the region.
5082 The number of screen lines may be different from the number of actual lines,
5083 due to line breaking, display table, etc.
5085 Optional arguments BEG and END default to `point-min' and `point-max'
5088 If region ends with a newline, ignore it unless optional third argument
5089 COUNT-FINAL-NEWLINE is non-nil.
5091 The optional fourth argument WINDOW specifies the window used for obtaining
5092 parameters such as width, horizontal scrolling, and so on. The default is
5093 to use the selected window's parameters.
5095 Like `vertical-motion', `count-screen-lines' always uses the current buffer,
5096 regardless of which buffer is displayed in WINDOW. This makes possible to use
5097 `count-screen-lines' in any buffer, whether or not it is currently displayed
5100 (setq beg
(point-min)))
5102 (setq end
(point-max)))
5108 (narrow-to-region (min beg end
)
5109 (if (and (not count-final-newline
)
5110 (= ?
\n (char-before (max beg end
))))
5113 (goto-char (point-min))
5114 (1+ (vertical-motion (buffer-size) window
))))))
5116 (defun window-buffer-height (window)
5117 "Return the height (in screen lines) of the buffer that WINDOW is displaying."
5118 (with-current-buffer (window-buffer window
)
5120 (count-screen-lines (point-min) (point-max)
5121 ;; If buffer ends with a newline, ignore it when
5122 ;; counting height unless point is after it.
5126 ;;; Resizing buffers to fit their contents exactly.
5127 (defun fit-window-to-buffer (&optional window max-height min-height override
)
5128 "Adjust height of WINDOW to display its buffer's contents exactly.
5129 WINDOW can be any live window and defaults to the selected one.
5131 Optional argument MAX-HEIGHT specifies the maximum height of
5132 WINDOW and defaults to the height of WINDOW's frame. Optional
5133 argument MIN-HEIGHT specifies the minimum height of WINDOW and
5134 defaults to `window-min-height'. Both, MAX-HEIGHT and MIN-HEIGHT
5135 are specified in lines and include the mode line and header line,
5138 Optional argument OVERRIDE non-nil means override restrictions
5139 imposed by `window-min-height' and `window-min-width' on the size
5142 Return the number of lines by which WINDOW was enlarged or
5143 shrunk. If an error occurs during resizing, return nil but don't
5146 Note that even if this function makes WINDOW large enough to show
5147 _all_ lines of its buffer you might not see the first lines when
5148 WINDOW was scrolled."
5150 ;; Do all the work in WINDOW and its buffer and restore the selected
5151 ;; window and the current buffer when we're done.
5152 (setq window
(window-normalize-live-window window
))
5153 ;; Can't resize a full height or fixed-size window.
5154 (unless (or (window-size-fixed-p window
)
5155 (window-full-height-p window
))
5156 ;; `with-selected-window' should orderly restore the current buffer.
5157 (with-selected-window window
5158 ;; We are in WINDOW's buffer now.
5159 (let* (;; Adjust MIN-HEIGHT.
5162 (window-min-size window nil window
)
5163 (max (or min-height window-min-height
)
5164 window-safe-min-height
)))
5166 (window-total-size (frame-root-window window
)))
5167 ;; Adjust MAX-HEIGHT.
5169 (if (or override
(not max-height
))
5171 (min max-height max-window-height
)))
5172 ;; Make `desired-height' the height necessary to show
5173 ;; all of WINDOW's buffer, constrained by MIN-HEIGHT
5178 (+ (count-screen-lines)
5179 ;; For non-minibuffers count the mode line, if any.
5180 (if (and (not (window-minibuffer-p window
))
5184 ;; Count the header line, if any.
5185 (if header-line-format
1 0))
5189 (- desired-height
(window-total-size window
)))
5191 (if (> desired-delta
0)
5193 (window-max-delta window nil window
))
5195 (- (window-min-delta window nil window
))))))
5196 ;; This `condition-case' shouldn't be necessary, but who knows?
5199 ;; Return zero if DELTA became zero in the proces.
5201 ;; Don't try to redisplay with the cursor at the end on its
5202 ;; own line--that would force a scroll and spoil things.
5203 (when (and (eobp) (bolp) (not (bobp)))
5204 ;; It's silly to put `point' at the end of the previous
5205 ;; line and so maybe force horizontal scrolling.
5206 (set-window-point window
(line-beginning-position 0)))
5207 ;; Call `window-resize' with OVERRIDE argument equal WINDOW.
5208 (window-resize window delta nil window
)
5209 ;; Check if the last line is surely fully visible. If
5210 ;; not, enlarge the window.
5211 (let ((end (save-excursion
5212 (goto-char (point-max))
5213 (when (and (bolp) (not (bobp)))
5214 ;; Don't include final newline.
5216 (when truncate-lines
5217 ;; If line-wrapping is turned off, test the
5218 ;; beginning of the last line for
5219 ;; visibility instead of the end, as the
5220 ;; end of the line could be invisible by
5221 ;; virtue of extending past the edge of the
5225 (set-window-vscroll window
0)
5226 ;; This loop might in some rare pathological cases raise
5227 ;; an error - another reason for the `condition-case'.
5228 (while (and (< desired-height max-height
)
5229 (= desired-height
(window-total-size))
5230 (not (pos-visible-in-window-p end
)))
5231 (window-resize window
1 nil window
)
5232 (setq desired-height
(1+ desired-height
)))))
5233 (error (setq delta nil
)))
5236 (defun window-safely-shrinkable-p (&optional window
)
5237 "Return t if WINDOW can be shrunk without shrinking other windows.
5238 WINDOW defaults to the selected window."
5239 (with-selected-window (or window
(selected-window))
5240 (let ((edges (window-edges)))
5241 ;; The following doesn't satisfy the doc-string's claim when
5242 ;; window and previous-/next-window are not part of the same
5243 ;; combination but still share a common edge. Using
5244 ;; `window-iso-combined-p' instead should handle that.
5245 (or (= (nth 2 edges
) (nth 2 (window-edges (previous-window))))
5246 (= (nth 0 edges
) (nth 0 (window-edges (next-window))))))))
5248 ;; 'window-safely-shrinkable-p "use `window-iso-combined-p' instead." "24.1")
5250 (defun shrink-window-if-larger-than-buffer (&optional window
)
5251 "Shrink height of WINDOW if its buffer doesn't need so many lines.
5252 More precisely, shrink WINDOW vertically to be as small as
5253 possible, while still showing the full contents of its buffer.
5254 WINDOW defaults to the selected window.
5256 Do not shrink WINDOW to less than `window-min-height' lines. Do
5257 nothing if the buffer contains more lines than the present window
5258 height, or if some of the window's contents are scrolled out of
5259 view, or if shrinking this window would also shrink another
5260 window, or if the window is the only window of its frame.
5262 Return non-nil if the window was shrunk, nil otherwise."
5264 (setq window
(window-normalize-live-window window
))
5265 ;; Make sure that WINDOW is vertically combined and `point-min' is
5266 ;; visible (for whatever reason that's needed). The remaining issues
5267 ;; should be taken care of by `fit-window-to-buffer'.
5268 (when (and (window-iso-combined-p window
)
5269 (pos-visible-in-window-p (point-min) window
))
5270 (fit-window-to-buffer window
(window-total-size window
))))
5272 (defun kill-buffer-and-window ()
5273 "Kill the current buffer and delete the selected window."
5275 (let ((window-to-delete (selected-window))
5276 (buffer-to-kill (current-buffer))
5277 (delete-window-hook (lambda () (ignore-errors (delete-window)))))
5280 (add-hook 'kill-buffer-hook delete-window-hook t t
)
5281 (if (kill-buffer (current-buffer))
5282 ;; If `delete-window' failed before, we rerun it to regenerate
5283 ;; the error so it can be seen in the echo area.
5284 (when (eq (selected-window) window-to-delete
)
5286 ;; If the buffer is not dead for some reason (probably because
5287 ;; of a `quit' signal), remove the hook again.
5289 (with-current-buffer buffer-to-kill
5290 (remove-hook 'kill-buffer-hook delete-window-hook t
))))))
5293 (defvar recenter-last-op nil
5294 "Indicates the last recenter operation performed.
5295 Possible values: `top', `middle', `bottom', integer or float numbers.")
5297 (defcustom recenter-positions
'(middle top bottom
)
5298 "Cycling order for `recenter-top-bottom'.
5299 A list of elements with possible values `top', `middle', `bottom',
5300 integer or float numbers that define the cycling order for
5301 the command `recenter-top-bottom'.
5303 Top and bottom destinations are `scroll-margin' lines the from true
5304 window top and bottom. Middle redraws the frame and centers point
5305 vertically within the window. Integer number moves current line to
5306 the specified absolute window-line. Float number between 0.0 and 1.0
5307 means the percentage of the screen space from the top. The default
5308 cycling order is middle -> top -> bottom."
5309 :type
'(repeat (choice
5310 (const :tag
"Top" top
)
5311 (const :tag
"Middle" middle
)
5312 (const :tag
"Bottom" bottom
)
5313 (integer :tag
"Line number")
5314 (float :tag
"Percentage")))
5318 (defun recenter-top-bottom (&optional arg
)
5319 "Move current buffer line to the specified window line.
5320 With no prefix argument, successive calls place point according
5321 to the cycling order defined by `recenter-positions'.
5323 A prefix argument is handled like `recenter':
5324 With numeric prefix ARG, move current line to window-line ARG.
5325 With plain `C-u', move current line to window center."
5328 (arg (recenter arg
)) ; Always respect ARG.
5330 (setq recenter-last-op
5331 (if (eq this-command last-command
)
5332 (car (or (cdr (member recenter-last-op recenter-positions
))
5333 recenter-positions
))
5334 (car recenter-positions
)))
5335 (let ((this-scroll-margin
5336 (min (max 0 scroll-margin
)
5337 (truncate (/ (window-body-height) 4.0)))))
5338 (cond ((eq recenter-last-op
'middle
)
5340 ((eq recenter-last-op
'top
)
5341 (recenter this-scroll-margin
))
5342 ((eq recenter-last-op
'bottom
)
5343 (recenter (- -
1 this-scroll-margin
)))
5344 ((integerp recenter-last-op
)
5345 (recenter recenter-last-op
))
5346 ((floatp recenter-last-op
)
5347 (recenter (round (* recenter-last-op
(window-height))))))))))
5349 (define-key global-map
[?\C-l
] 'recenter-top-bottom
)
5351 (defun move-to-window-line-top-bottom (&optional arg
)
5352 "Position point relative to window.
5354 With a prefix argument ARG, acts like `move-to-window-line'.
5356 With no argument, positions point at center of window.
5357 Successive calls position point at positions defined
5358 by `recenter-positions'."
5361 (arg (move-to-window-line arg
)) ; Always respect ARG.
5363 (setq recenter-last-op
5364 (if (eq this-command last-command
)
5365 (car (or (cdr (member recenter-last-op recenter-positions
))
5366 recenter-positions
))
5367 (car recenter-positions
)))
5368 (let ((this-scroll-margin
5369 (min (max 0 scroll-margin
)
5370 (truncate (/ (window-body-height) 4.0)))))
5371 (cond ((eq recenter-last-op
'middle
)
5372 (call-interactively 'move-to-window-line
))
5373 ((eq recenter-last-op
'top
)
5374 (move-to-window-line this-scroll-margin
))
5375 ((eq recenter-last-op
'bottom
)
5376 (move-to-window-line (- -
1 this-scroll-margin
)))
5377 ((integerp recenter-last-op
)
5378 (move-to-window-line recenter-last-op
))
5379 ((floatp recenter-last-op
)
5380 (move-to-window-line (round (* recenter-last-op
(window-height))))))))))
5382 (define-key global-map
[?\M-r
] 'move-to-window-line-top-bottom
)
5384 ;;; Scrolling commands.
5386 ;;; Scrolling commands which does not signal errors at top/bottom
5387 ;;; of buffer at first key-press (instead moves to top/bottom
5390 (defcustom scroll-error-top-bottom nil
5391 "Move point to top/bottom of buffer before signalling a scrolling error.
5392 A value of nil means just signal an error if no more scrolling possible.
5393 A value of t means point moves to the beginning or the end of the buffer
5394 \(depending on scrolling direction) when no more scrolling possible.
5395 When point is already on that position, then signal an error."
5400 (defun scroll-up-command (&optional arg
)
5401 "Scroll text of selected window upward ARG lines; or near full screen if no ARG.
5402 If `scroll-error-top-bottom' is non-nil and `scroll-up' cannot
5403 scroll window further, move cursor to the bottom line.
5404 When point is already on that position, then signal an error.
5405 A near full screen is `next-screen-context-lines' less than a full screen.
5406 Negative ARG means scroll downward.
5407 If ARG is the atom `-', scroll downward by nearly full screen."
5410 ((null scroll-error-top-bottom
)
5413 (scroll-down-command nil
))
5414 ((< (prefix-numeric-value arg
) 0)
5415 (scroll-down-command (- (prefix-numeric-value arg
))))
5417 (scroll-up arg
)) ; signal error
5423 ;; When scrolling by ARG lines can't be done,
5424 ;; move by ARG lines instead.
5426 ;; When ARG is nil for full-screen scrolling,
5427 ;; move to the bottom of the buffer.
5428 (goto-char (point-max))))))))
5430 (put 'scroll-up-command
'scroll-command t
)
5432 (defun scroll-down-command (&optional arg
)
5433 "Scroll text of selected window down ARG lines; or near full screen if no ARG.
5434 If `scroll-error-top-bottom' is non-nil and `scroll-down' cannot
5435 scroll window further, move cursor to the top line.
5436 When point is already on that position, then signal an error.
5437 A near full screen is `next-screen-context-lines' less than a full screen.
5438 Negative ARG means scroll upward.
5439 If ARG is the atom `-', scroll upward by nearly full screen."
5442 ((null scroll-error-top-bottom
)
5445 (scroll-up-command nil
))
5446 ((< (prefix-numeric-value arg
) 0)
5447 (scroll-up-command (- (prefix-numeric-value arg
))))
5449 (scroll-down arg
)) ; signal error
5453 (beginning-of-buffer
5455 ;; When scrolling by ARG lines can't be done,
5456 ;; move by ARG lines instead.
5457 (forward-line (- arg
))
5458 ;; When ARG is nil for full-screen scrolling,
5459 ;; move to the top of the buffer.
5460 (goto-char (point-min))))))))
5462 (put 'scroll-down-command
'scroll-command t
)
5464 ;;; Scrolling commands which scroll a line instead of full screen.
5466 (defun scroll-up-line (&optional arg
)
5467 "Scroll text of selected window upward ARG lines; or one line if no ARG.
5468 If ARG is omitted or nil, scroll upward by one line.
5469 This is different from `scroll-up-command' that scrolls a full screen."
5471 (scroll-up (or arg
1)))
5473 (put 'scroll-up-line
'scroll-command t
)
5475 (defun scroll-down-line (&optional arg
)
5476 "Scroll text of selected window down ARG lines; or one line if no ARG.
5477 If ARG is omitted or nil, scroll down by one line.
5478 This is different from `scroll-down-command' that scrolls a full screen."
5480 (scroll-down (or arg
1)))
5482 (put 'scroll-down-line
'scroll-command t
)
5485 (defun scroll-other-window-down (lines)
5486 "Scroll the \"other window\" down.
5487 For more details, see the documentation for `scroll-other-window'."
5489 (scroll-other-window
5490 ;; Just invert the argument's meaning.
5491 ;; We can do that without knowing which window it will be.
5492 (if (eq lines
'-
) nil
5494 (- (prefix-numeric-value lines
))))))
5496 (defun beginning-of-buffer-other-window (arg)
5497 "Move point to the beginning of the buffer in the other window.
5498 Leave mark at previous position.
5499 With arg N, put point N/10 of the way from the true beginning."
5501 (let ((orig-window (selected-window))
5502 (window (other-window-for-scrolling)))
5503 ;; We use unwind-protect rather than save-window-excursion
5504 ;; because the latter would preserve the things we want to change.
5507 (select-window window
)
5508 ;; Set point and mark in that window's buffer.
5510 (beginning-of-buffer arg
))
5511 ;; Set point accordingly.
5513 (select-window orig-window
))))
5515 (defun end-of-buffer-other-window (arg)
5516 "Move point to the end of the buffer in the other window.
5517 Leave mark at previous position.
5518 With arg N, put point N/10 of the way from the true end."
5520 ;; See beginning-of-buffer-other-window for comments.
5521 (let ((orig-window (selected-window))
5522 (window (other-window-for-scrolling)))
5525 (select-window window
)
5527 (end-of-buffer arg
))
5529 (select-window orig-window
))))
5531 (defvar mouse-autoselect-window-timer nil
5532 "Timer used by delayed window autoselection.")
5534 (defvar mouse-autoselect-window-position nil
5535 "Last mouse position recorded by delayed window autoselection.")
5537 (defvar mouse-autoselect-window-window nil
5538 "Last window recorded by delayed window autoselection.")
5540 (defvar mouse-autoselect-window-state nil
5541 "When non-nil, special state of delayed window autoselection.
5542 Possible values are `suspend' \(suspend autoselection after a menu or
5543 scrollbar interaction\) and `select' \(the next invocation of
5544 'handle-select-window' shall select the window immediately\).")
5546 (defun mouse-autoselect-window-cancel (&optional force
)
5547 "Cancel delayed window autoselection.
5548 Optional argument FORCE means cancel unconditionally."
5549 (unless (and (not force
)
5550 ;; Don't cancel for select-window or select-frame events
5551 ;; or when the user drags a scroll bar.
5552 (or (memq this-command
5553 '(handle-select-window handle-switch-frame
))
5554 (and (eq this-command
'scroll-bar-toolkit-scroll
)
5555 (memq (nth 4 (event-end last-input-event
))
5556 '(handle end-scroll
)))))
5557 (setq mouse-autoselect-window-state nil
)
5558 (when (timerp mouse-autoselect-window-timer
)
5559 (cancel-timer mouse-autoselect-window-timer
))
5560 (remove-hook 'pre-command-hook
'mouse-autoselect-window-cancel
)))
5562 (defun mouse-autoselect-window-start (mouse-position &optional window suspend
)
5563 "Start delayed window autoselection.
5564 MOUSE-POSITION is the last position where the mouse was seen as returned
5565 by `mouse-position'. Optional argument WINDOW non-nil denotes the
5566 window where the mouse was seen. Optional argument SUSPEND non-nil
5567 means suspend autoselection."
5568 ;; Record values for MOUSE-POSITION, WINDOW, and SUSPEND.
5569 (setq mouse-autoselect-window-position mouse-position
)
5570 (when window
(setq mouse-autoselect-window-window window
))
5571 (setq mouse-autoselect-window-state
(when suspend
'suspend
))
5572 ;; Install timer which runs `mouse-autoselect-window-select' after
5573 ;; `mouse-autoselect-window' seconds.
5574 (setq mouse-autoselect-window-timer
5576 (abs mouse-autoselect-window
) nil
'mouse-autoselect-window-select
)))
5578 (defun mouse-autoselect-window-select ()
5579 "Select window with delayed window autoselection.
5580 If the mouse position has stabilized in a non-selected window, select
5581 that window. The minibuffer window is selected only if the minibuffer is
5582 active. This function is run by `mouse-autoselect-window-timer'."
5584 (let* ((mouse-position (mouse-position))
5587 (window-at (cadr mouse-position
) (cddr mouse-position
)
5588 (car mouse-position
)))))
5590 ((or (menu-or-popup-active-p)
5592 (not (coordinates-in-window-p (cdr mouse-position
) window
))))
5593 ;; A menu / popup dialog is active or the mouse is on the scroll-bar
5594 ;; of WINDOW, temporarily suspend delayed autoselection.
5595 (mouse-autoselect-window-start mouse-position nil t
))
5596 ((eq mouse-autoselect-window-state
'suspend
)
5597 ;; Delayed autoselection was temporarily suspended, reenable it.
5598 (mouse-autoselect-window-start mouse-position
))
5599 ((and window
(not (eq window
(selected-window)))
5600 (or (not (numberp mouse-autoselect-window
))
5601 (and (> mouse-autoselect-window
0)
5602 ;; If `mouse-autoselect-window' is positive, select
5603 ;; window if the window is the same as before.
5604 (eq window mouse-autoselect-window-window
))
5605 ;; Otherwise select window if the mouse is at the same
5606 ;; position as before. Observe that the first test after
5607 ;; starting autoselection usually fails since the value of
5608 ;; `mouse-autoselect-window-position' recorded there is the
5609 ;; position where the mouse has entered the new window and
5610 ;; not necessarily where the mouse has stopped moving.
5611 (equal mouse-position mouse-autoselect-window-position
))
5612 ;; The minibuffer is a candidate window if it's active.
5613 (or (not (window-minibuffer-p window
))
5614 (eq window
(active-minibuffer-window))))
5615 ;; Mouse position has stabilized in non-selected window: Cancel
5616 ;; delayed autoselection and try to select that window.
5617 (mouse-autoselect-window-cancel t
)
5618 ;; Select window where mouse appears unless the selected window is the
5619 ;; minibuffer. Use `unread-command-events' in order to execute pre-
5620 ;; and post-command hooks and trigger idle timers. To avoid delaying
5621 ;; autoselection again, set `mouse-autoselect-window-state'."
5622 (unless (window-minibuffer-p (selected-window))
5623 (setq mouse-autoselect-window-state
'select
)
5624 (setq unread-command-events
5625 (cons (list 'select-window
(list window
))
5626 unread-command-events
))))
5627 ((or (and window
(eq window
(selected-window)))
5628 (not (numberp mouse-autoselect-window
))
5629 (equal mouse-position mouse-autoselect-window-position
))
5630 ;; Mouse position has either stabilized in the selected window or at
5631 ;; `mouse-autoselect-window-position': Cancel delayed autoselection.
5632 (mouse-autoselect-window-cancel t
))
5634 ;; Mouse position has not stabilized yet, resume delayed
5636 (mouse-autoselect-window-start mouse-position window
))))))
5638 (defun handle-select-window (event)
5639 "Handle select-window events."
5641 (let ((window (posn-window (event-start event
))))
5642 (unless (or (not (window-live-p window
))
5643 ;; Don't switch if we're currently in the minibuffer.
5644 ;; This tries to work around problems where the
5645 ;; minibuffer gets unselected unexpectedly, and where
5646 ;; you then have to move your mouse all the way down to
5647 ;; the minibuffer to select it.
5648 (window-minibuffer-p (selected-window))
5649 ;; Don't switch to minibuffer window unless it's active.
5650 (and (window-minibuffer-p window
)
5651 (not (minibuffer-window-active-p window
)))
5652 ;; Don't switch when autoselection shall be delayed.
5653 (and (numberp mouse-autoselect-window
)
5654 (not (zerop mouse-autoselect-window
))
5655 (not (eq mouse-autoselect-window-state
'select
))
5657 ;; Cancel any delayed autoselection.
5658 (mouse-autoselect-window-cancel t
)
5659 ;; Start delayed autoselection from current mouse
5660 ;; position and window.
5661 (mouse-autoselect-window-start (mouse-position) window
)
5662 ;; Executing a command cancels delayed autoselection.
5664 'pre-command-hook
'mouse-autoselect-window-cancel
))))
5665 (when mouse-autoselect-window
5666 ;; Reset state of delayed autoselection.
5667 (setq mouse-autoselect-window-state nil
)
5668 ;; Run `mouse-leave-buffer-hook' when autoselecting window.
5669 (run-hooks 'mouse-leave-buffer-hook
))
5670 (select-window window
))))
5672 (defun truncated-partial-width-window-p (&optional window
)
5673 "Return non-nil if lines in WINDOW are specifically truncated due to its width.
5674 WINDOW defaults to the selected window.
5675 Return nil if WINDOW is not a partial-width window
5676 (regardless of the value of `truncate-lines').
5677 Otherwise, consult the value of `truncate-partial-width-windows'
5678 for the buffer shown in WINDOW."
5680 (setq window
(selected-window)))
5681 (unless (window-full-width-p window
)
5682 (let ((t-p-w-w (buffer-local-value 'truncate-partial-width-windows
5683 (window-buffer window
))))
5684 (if (integerp t-p-w-w
)
5685 (< (window-width window
) t-p-w-w
)
5688 ;; Some of these are in tutorial--default-keys, so update that if you
5690 (define-key ctl-x-map
"0" 'delete-window
)
5691 (define-key ctl-x-map
"1" 'delete-other-windows
)
5692 (define-key ctl-x-map
"2" 'split-window-above-each-other
)
5693 (define-key ctl-x-map
"3" 'split-window-side-by-side
)
5694 (define-key ctl-x-map
"o" 'other-window
)
5695 (define-key ctl-x-map
"^" 'enlarge-window
)
5696 (define-key ctl-x-map
"}" 'enlarge-window-horizontally
)
5697 (define-key ctl-x-map
"{" 'shrink-window-horizontally
)
5698 (define-key ctl-x-map
"-" 'shrink-window-if-larger-than-buffer
)
5699 (define-key ctl-x-map
"+" 'balance-windows
)
5700 (define-key ctl-x-4-map
"0" 'kill-buffer-and-window
)
5702 ;;; window.el ends here