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-valid-p
(object)
104 "Return t if OBJECT denotes a live window or internal window.
105 Otherwise, return nil; this includes the case where OBJECT is a
107 (and (windowp object
)
108 (or (window-buffer object
) (window-child object
))
111 (defsubst window-normalize-buffer
(buffer-or-name)
112 "Return buffer specified by BUFFER-OR-NAME.
113 BUFFER-OR-NAME must be either a buffer or a string naming a live
114 buffer and defaults to the current buffer."
116 ((not buffer-or-name
)
118 ((bufferp buffer-or-name
)
119 (if (buffer-live-p buffer-or-name
)
121 (error "Buffer %s is not a live buffer" buffer-or-name
)))
122 ((get-buffer buffer-or-name
))
124 (error "No such buffer %s" buffer-or-name
))))
126 (defsubst window-normalize-frame
(frame)
127 "Return frame specified by FRAME.
128 FRAME must be a live frame and defaults to the selected frame."
130 (if (frame-live-p frame
)
132 (error "%s is not a live frame" frame
))
135 (defsubst window-normalize-window
(window &optional live-only
)
136 "Return window specified by WINDOW.
137 If WINDOW is nil, return `selected-window'.
138 If WINDOW is a live window or internal window, return WINDOW;
139 if LIVE-ONLY is non-nil, return WINDOW for a live window only.
140 Otherwise, signal an error."
144 (if (window-live-p window
)
146 (error "%s is not a live window" window
)))
147 ((if (window-valid-p window
)
149 (error "%s is not a window" window
)))))
151 (defvar ignore-window-parameters nil
152 "If non-nil, standard functions ignore window parameters.
153 The functions currently affected by this are `split-window',
154 `delete-window', `delete-other-windows' and `other-window'.
156 An application may bind this to a non-nil value around calls to
157 these functions to inhibit processing of window parameters.")
159 (defconst window-safe-min-height
1
160 "The absolute minimum number of lines of a window.
161 Anything less might crash Emacs.")
163 (defcustom window-min-height
4
164 "The minimum number of lines of any window.
165 The value has to accommodate a mode- or header-line if present.
166 A value less than `window-safe-min-height' is ignored. The value
167 of this variable is honored when windows are resized or split.
169 Applications should never rebind this variable. To resize a
170 window to a height less than the one specified here, an
171 application should instead call `window-resize' with a non-nil
172 IGNORE argument. In order to have `split-window' make a window
173 shorter, explictly specify the SIZE argument of that function."
178 (defconst window-safe-min-width
2
179 "The absolute minimum number of columns of a window.
180 Anything less might crash Emacs.")
182 (defcustom window-min-width
10
183 "The minimum number of columns of any window.
184 The value has to accommodate margins, fringes, or scrollbars if
185 present. A value less than `window-safe-min-width' is ignored.
186 The value of this variable is honored when windows are resized or
189 Applications should never rebind this variable. To resize a
190 window to a width less than the one specified here, an
191 application should instead call `window-resize' with a non-nil
192 IGNORE argument. In order to have `split-window' make a window
193 narrower, explictly specify the SIZE argument of that function."
198 (defsubst window-combined-p
(&optional window horizontal
)
199 "Return non-nil if WINDOW has siblings in a given direction.
200 If WINDOW is omitted or nil, it defaults to the selected window.
202 HORIZONTAL determines a direction for the window combination.
203 If HORIZONTAL is omitted or nil, return non-nil if WINDOW is part
204 of a vertical window combination.
205 If HORIZONTAL is non-nil, return non-nil if WINDOW is part of a
206 horizontal window combination."
207 (setq window
(window-normalize-window window
))
208 (let ((parent (window-parent window
)))
211 (window-left-child parent
)
212 (window-top-child parent
)))))
214 (defun window-combinations (window &optional horizontal
)
215 "Return largest number of windows vertically arranged within WINDOW.
216 If WINDOW is omitted or nil, it defaults to the selected window.
217 If HORIZONTAL is non-nil, return the largest number of
218 windows horizontally arranged within WINDOW."
219 (setq window
(window-normalize-window window
))
221 ((window-live-p window
)
222 ;; If WINDOW is live, return 1.
225 (window-left-child window
)
226 (window-top-child window
))
227 ;; If WINDOW is iso-combined, return the sum of the values for all
228 ;; child windows of WINDOW.
229 (let ((child (window-child window
))
233 (+ (window-combinations child horizontal
)
235 (setq child
(window-right child
)))
238 ;; If WINDOW is not iso-combined, return the maximum value of any
239 ;; child window of WINDOW.
240 (let ((child (window-child window
))
244 (max (window-combinations child horizontal
)
246 (setq child
(window-right child
)))
249 (defun walk-window-tree-1 (proc walk-window-tree-window any
&optional sub-only
)
250 "Helper function for `walk-window-tree' and `walk-window-subtree'."
251 (let (walk-window-tree-buffer)
252 (while walk-window-tree-window
253 (setq walk-window-tree-buffer
254 (window-buffer walk-window-tree-window
))
255 (when (or walk-window-tree-buffer any
)
256 (funcall proc walk-window-tree-window
))
257 (unless walk-window-tree-buffer
259 proc
(window-left-child walk-window-tree-window
) any
)
261 proc
(window-top-child walk-window-tree-window
) any
))
263 (setq walk-window-tree-window nil
)
264 (setq walk-window-tree-window
265 (window-right walk-window-tree-window
))))))
267 (defun walk-window-tree (proc &optional frame any
)
268 "Run function PROC on each live window of FRAME.
269 PROC must be a function with one argument - a window. FRAME must
270 be a live frame and defaults to the selected one. ANY, if
271 non-nil means to run PROC on all live and internal windows of
274 This function performs a pre-order, depth-first traversal of the
275 window tree. If PROC changes the window tree, the result is
277 (let ((walk-window-tree-frame (window-normalize-frame frame
)))
279 proc
(frame-root-window walk-window-tree-frame
) any
)))
281 (defun walk-window-subtree (proc &optional window any
)
282 "Run function PROC on the subtree of windows rooted at WINDOW.
283 WINDOW defaults to the selected window. PROC must be a function
284 with one argument - a window. By default, run PROC only on live
285 windows of the subtree. If the optional argument ANY is non-nil,
286 run PROC on all live and internal windows of the subtree. If
287 WINDOW is live, run PROC on WINDOW only.
289 This function performs a pre-order, depth-first traversal of the
290 subtree rooted at WINDOW. If PROC changes that tree, the result
292 (setq window
(window-normalize-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-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 windows on
387 FRAME to nil. An atomic window is wrongly configured if it has
388 no child windows or one of its child windows 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-valid-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-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-combined-p sub horizontal
)
559 ;; The minimum size of an iso-combination is the sum of
560 ;; the minimum sizes of its child windows.
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 child windows.
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, recursively, its child
625 windows. The function `window-resizable' looks at other windows
628 DELTA positive means WINDOW shall be enlarged by DELTA lines or
629 columns. If WINDOW cannot be enlarged by DELTA lines or columns
630 return the maximum value in the range 0..DELTA by which WINDOW
633 DELTA negative means WINDOW shall be shrunk by -DELTA lines or
634 columns. If WINDOW cannot be shrunk by -DELTA lines or columns,
635 return the minimum value in the range DELTA..0 by which WINDOW
638 Optional argument IGNORE non-nil means ignore any restrictions
639 imposed by fixed size windows, `window-min-height' or
640 `window-min-width' settings. IGNORE equal `safe' means live
641 windows may get as small as `window-safe-min-height' lines and
642 `window-safe-min-width' columns. IGNORE any window means ignore
643 restrictions for that window only."
644 (setq window
(window-normalize-window window
))
647 (max (- (window-min-size window horizontal ignore
)
648 (window-total-size window horizontal
))
650 ((window-size-ignore window ignore
)
653 (if (window-size-fixed-p window horizontal
)
658 (defsubst window-sizable-p
(window delta
&optional horizontal ignore
)
659 "Return t if WINDOW can be resized by DELTA lines.
660 For the meaning of the arguments of this function see the
661 doc-string of `window-sizable'."
662 (setq window
(window-normalize-window window
))
664 (>= (window-sizable window delta horizontal ignore
) delta
)
665 (<= (window-sizable window delta horizontal ignore
) delta
)))
667 (defun window-size-fixed-1 (window horizontal
)
668 "Internal function for `window-size-fixed-p'."
669 (let ((sub (window-child window
)))
672 ;; WINDOW is an internal window.
673 (if (window-combined-p sub horizontal
)
674 ;; An iso-combination is fixed size if all its child
675 ;; windows are fixed-size.
678 (unless (window-size-fixed-1 sub horizontal
)
679 ;; We found a non-fixed-size child window, so
680 ;; WINDOW's size is not fixed.
682 (setq sub
(window-right sub
)))
683 ;; All child windows are fixed-size, so WINDOW's size is
686 ;; An ortho-combination is fixed-size if at least one of its
687 ;; child windows is fixed-size.
689 (when (window-size-fixed-1 sub horizontal
)
690 ;; We found a fixed-size child window, so WINDOW's size
693 (setq sub
(window-right sub
))))
694 ;; WINDOW is a live window.
695 (with-current-buffer (window-buffer window
)
697 (memq window-size-fixed
'(width t
))
698 (memq window-size-fixed
'(height t
))))))))
700 (defun window-size-fixed-p (&optional window horizontal
)
701 "Return non-nil if WINDOW's height is fixed.
702 WINDOW can be an arbitrary window and defaults to the selected
703 window. Optional argument HORIZONTAL non-nil means return
704 non-nil if WINDOW's width is fixed.
706 If this function returns nil, this does not necessarily mean that
707 WINDOW can be resized in the desired direction. The functions
708 `window-resizable' and `window-resizable-p' will tell that."
710 (window-normalize-window window
) horizontal
))
712 (defun window-min-delta-1 (window delta
&optional horizontal ignore trail noup
)
713 "Internal function for `window-min-delta'."
714 (if (not (window-parent window
))
715 ;; If we can't go up, return zero.
717 ;; Else try to find a non-fixed-size sibling of WINDOW.
718 (let* ((parent (window-parent window
))
719 (sub (window-child parent
)))
721 (if (window-combined-p sub horizontal
)
722 ;; In an iso-combination throw DELTA if we find at least one
723 ;; child window and that window is either not fixed-size or
724 ;; we can ignore fixed-sizeness.
725 (let ((skip (eq trail
'after
)))
729 (setq skip
(eq trail
'before
)))
731 ((and (not (window-size-ignore window ignore
))
732 (window-size-fixed-p sub horizontal
)))
734 ;; We found a non-fixed-size child window.
735 (throw 'done delta
)))
736 (setq sub
(window-right sub
))))
737 ;; In an ortho-combination set DELTA to the minimum value by
738 ;; which other child windows can shrink.
740 (unless (eq sub window
)
743 (- (window-total-size sub horizontal
)
744 (window-min-size sub horizontal ignore
)))))
745 (setq sub
(window-right sub
))))
748 (window-min-delta-1 parent delta horizontal ignore trail
))))))
750 (defun window-min-delta (&optional window horizontal ignore trail noup nodown
)
751 "Return number of lines by which WINDOW can be shrunk.
752 WINDOW can be an arbitrary window and defaults to the selected
753 window. Return zero if WINDOW cannot be shrunk.
755 Optional argument HORIZONTAL non-nil means return number of
756 columns by which WINDOW can be shrunk.
758 Optional argument IGNORE non-nil means ignore any restrictions
759 imposed by fixed size windows, `window-min-height' or
760 `window-min-width' settings. IGNORE a window means ignore
761 restrictions for that window only. IGNORE equal `safe' means
762 live windows may get as small as `window-safe-min-height' lines
763 and `window-safe-min-width' columns.
765 Optional argument TRAIL `before' means only windows to the left
766 of or above WINDOW can be enlarged. Optional argument TRAIL
767 `after' means only windows to the right of or below WINDOW can be
770 Optional argument NOUP non-nil means don't go up in the window
771 tree but try to enlarge windows within WINDOW's combination only.
773 Optional argument NODOWN non-nil means don't check whether WINDOW
774 itself \(and its child windows) can be shrunk; check only whether
775 at least one other windows can be enlarged appropriately."
776 (setq window
(window-normalize-window window
))
777 (let ((size (window-total-size window horizontal
))
778 (minimum (window-min-size window horizontal ignore
)))
781 ;; If NODOWN is t, try to recover the entire size of WINDOW.
782 (window-min-delta-1 window size horizontal ignore trail noup
))
784 ;; If NODOWN is nil and WINDOW's size is already at its minimum,
785 ;; there's nothing to recover.
788 ;; Otherwise, try to recover whatever WINDOW is larger than its
791 window
(- size minimum
) horizontal ignore trail noup
)))))
793 (defun window-max-delta-1 (window delta
&optional horizontal ignore trail noup
)
794 "Internal function of `window-max-delta'."
795 (if (not (window-parent window
))
796 ;; Can't go up. Return DELTA.
798 (let* ((parent (window-parent window
))
799 (sub (window-child parent
)))
801 (if (window-combined-p sub horizontal
)
802 ;; For an iso-combination calculate how much we can get from
803 ;; other child windows.
804 (let ((skip (eq trail
'after
)))
808 (setq skip
(eq trail
'before
)))
813 (- (window-total-size sub horizontal
)
814 (window-min-size sub horizontal ignore
))))))
815 (setq sub
(window-right sub
))))
816 ;; For an ortho-combination throw DELTA when at least one
817 ;; child window is fixed-size.
819 (when (and (not (eq sub window
))
820 (not (window-size-ignore sub ignore
))
821 (window-size-fixed-p sub horizontal
))
822 (throw 'fixed delta
))
823 (setq sub
(window-right sub
))))
825 ;; When NOUP is nil, DELTA is all we can get.
827 ;; Else try with parent of WINDOW, passing the DELTA we
829 (window-max-delta-1 parent delta horizontal ignore trail
))))))
831 (defun window-max-delta (&optional window horizontal ignore trail noup nodown
)
832 "Return maximum number of lines WINDOW by which WINDOW can be enlarged.
833 WINDOW can be an arbitrary window and defaults to the selected
834 window. The return value is zero if WINDOW cannot be enlarged.
836 Optional argument HORIZONTAL non-nil means return maximum number
837 of columns by which WINDOW can be enlarged.
839 Optional argument IGNORE non-nil means ignore any restrictions
840 imposed by fixed size windows, `window-min-height' or
841 `window-min-width' settings. IGNORE a window means ignore
842 restrictions for that window only. IGNORE equal `safe' means
843 live windows may get as small as `window-safe-min-height' lines
844 and `window-safe-min-width' columns.
846 Optional argument TRAIL `before' means only windows to the left
847 of or below WINDOW can be shrunk. Optional argument TRAIL
848 `after' means only windows to the right of or above WINDOW can be
851 Optional argument NOUP non-nil means don't go up in the window
852 tree but try to obtain the entire space from windows within
853 WINDOW's combination.
855 Optional argument NODOWN non-nil means do not check whether
856 WINDOW itself \(and its child windows) can be enlarged; check
857 only whether other windows can be shrunk appropriately."
858 (setq window
(window-normalize-window window
))
859 (if (and (not (window-size-ignore window ignore
))
860 (not nodown
) (window-size-fixed-p window horizontal
))
861 ;; With IGNORE and NOWDON nil return zero if WINDOW has fixed
864 ;; WINDOW has no fixed size.
865 (window-max-delta-1 window
0 horizontal ignore trail noup
)))
867 ;; Make NOUP also inhibit the min-size check.
868 (defun window-resizable (window delta
&optional horizontal ignore trail noup nodown
)
869 "Return DELTA if WINDOW can be resized vertically by DELTA lines.
870 Optional argument HORIZONTAL non-nil means return DELTA if WINDOW
871 can be resized horizontally by DELTA columns. A return value of
872 zero means that WINDOW is not resizable.
874 DELTA positive means WINDOW shall be enlarged by DELTA lines or
875 columns. If WINDOW cannot be enlarged by DELTA lines or columns
876 return the maximum value in the range 0..DELTA by which WINDOW
879 DELTA negative means WINDOW shall be shrunk by -DELTA lines or
880 columns. If WINDOW cannot be shrunk by -DELTA lines or columns,
881 return the minimum value in the range DELTA..0 that can be used
882 for shrinking WINDOW.
884 Optional argument IGNORE non-nil means ignore any restrictions
885 imposed by fixed size windows, `window-min-height' or
886 `window-min-width' settings. IGNORE a window means ignore
887 restrictions for that window only. IGNORE equal `safe' means
888 live windows may get as small as `window-safe-min-height' lines
889 and `window-safe-min-width' columns.
891 Optional argument TRAIL `before' means only windows to the left
892 of or below WINDOW can be shrunk. Optional argument TRAIL
893 `after' means only windows to the right of or above WINDOW can be
896 Optional argument NOUP non-nil means don't go up in the window
897 tree but try to distribute the space among the other windows
898 within WINDOW's combination.
900 Optional argument NODOWN non-nil means don't check whether WINDOW
901 and its child windows can be resized."
902 (setq window
(window-normalize-window window
))
905 (max (- (window-min-delta window horizontal ignore trail noup nodown
))
908 (min (window-max-delta window horizontal ignore trail noup nodown
)
912 (defun window-resizable-p (window delta
&optional horizontal ignore trail noup nodown
)
913 "Return t if WINDOW can be resized vertically by DELTA lines.
914 For the meaning of the arguments of this function see the
915 doc-string of `window-resizable'."
916 (setq window
(window-normalize-window window
))
918 (>= (window-resizable window delta horizontal ignore trail noup nodown
)
920 (<= (window-resizable window delta horizontal ignore trail noup nodown
)
923 (defun window-total-size (&optional window horizontal
)
924 "Return the total height or width of window WINDOW.
925 If WINDOW is omitted or nil, it defaults to the selected window.
927 If HORIZONTAL is omitted or nil, return the total height of
928 WINDOW, in lines, like `window-total-height'. Otherwise return
929 the total width, in columns, like `window-total-width'."
931 (window-total-width window
)
932 (window-total-height 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-window window
))
945 (= (window-total-size window
)
946 (window-total-size (frame-root-window window
))))
948 (defsubst window-full-width-p
(&optional window
)
949 "Return t if WINDOW is as wide as the containing frame.
950 More precisely, return t if and only if the total width of WINDOW
951 equals the total width of the root window of WINDOW's frame.
952 WINDOW can be any window and defaults to the selected one."
953 (setq window
(window-normalize-window window
))
954 (= (window-total-size window t
)
955 (window-total-size (frame-root-window window
) t
)))
957 (defun window-body-size (&optional window horizontal
)
958 "Return the height or width of WINDOW's text area.
959 If WINDOW is omitted or nil, it defaults to the selected window.
960 Signal an error if the window is not live.
962 If HORIZONTAL is omitted or nil, return the height of the text
963 area, like `window-body-height'. Otherwise, return the width of
964 the text area, like `window-body-width'."
966 (window-body-width window
)
967 (window-body-height window
)))
969 ;; Eventually we should make `window-height' obsolete.
970 (defalias 'window-width
'window-body-width
)
972 (defun window-current-scroll-bars (&optional window
)
973 "Return the current scroll bar settings for WINDOW.
974 WINDOW must be a live window and defaults to the selected one.
976 The return value is a cons cell (VERTICAL . HORIZONTAL) where
977 VERTICAL specifies the current location of the vertical scroll
978 bars (`left', `right', or nil), and HORIZONTAL specifies the
979 current location of the horizontal scroll bars (`top', `bottom',
982 Unlike `window-scroll-bars', this function reports the scroll bar
983 type actually used, once frame defaults and `scroll-bar-mode' are
985 (setq window
(window-normalize-window window t
))
986 (let ((vert (nth 2 (window-scroll-bars window
)))
988 (when (or (eq vert t
) (eq hor t
))
989 (let ((fcsb (frame-current-scroll-bars (window-frame window
))))
991 (setq vert
(car fcsb
)))
993 (setq hor
(cdr fcsb
)))))
996 (defun walk-windows (proc &optional minibuf all-frames
)
997 "Cycle through all live windows, calling PROC for each one.
998 PROC must specify a function with a window as its sole argument.
999 The optional arguments MINIBUF and ALL-FRAMES specify the set of
1000 windows to include in the walk.
1002 MINIBUF t means include the minibuffer window even if the
1003 minibuffer is not active. MINIBUF nil or omitted means include
1004 the minibuffer window only if the minibuffer is active. Any
1005 other value means do not include the minibuffer window even if
1006 the minibuffer is active.
1008 ALL-FRAMES nil or omitted means consider all windows on the
1009 selected frame, plus the minibuffer window if specified by the
1010 MINIBUF argument. If the minibuffer counts, consider all windows
1011 on all frames that share that minibuffer too. The following
1012 non-nil values of ALL-FRAMES have special meanings:
1014 - t means consider all windows on all existing frames.
1016 - `visible' means consider all windows on all visible frames on
1017 the current terminal.
1019 - 0 (the number zero) means consider all windows on all visible
1020 and iconified frames on the current terminal.
1022 - A frame means consider all windows on that frame only.
1024 Anything else means consider all windows on the selected frame
1027 This function changes neither the order of recently selected
1028 windows nor the buffer list."
1029 ;; If we start from the minibuffer window, don't fail to come
1031 (when (window-minibuffer-p (selected-window))
1033 ;; Make sure to not mess up the order of recently selected
1034 ;; windows. Use `save-selected-window' and `select-window'
1035 ;; with second argument non-nil for this purpose.
1036 (save-selected-window
1037 (when (framep all-frames
)
1038 (select-window (frame-first-window all-frames
) 'norecord
))
1039 (dolist (walk-windows-window (window-list-1 nil minibuf all-frames
))
1040 (funcall proc walk-windows-window
))))
1042 (defun window-point-1 (&optional window
)
1043 "Return value of WINDOW's point.
1044 WINDOW can be any live window and defaults to the selected one.
1046 This function is like `window-point' with one exception: If
1047 WINDOW is selected, it returns the value of `point' of WINDOW's
1048 buffer regardless of whether that buffer is current or not."
1049 (setq window
(window-normalize-window window t
))
1050 (if (eq window
(selected-window))
1051 (with-current-buffer (window-buffer window
)
1053 (window-point window
)))
1055 (defun set-window-point-1 (window pos
)
1056 "Set value of WINDOW's point to POS.
1057 WINDOW can be any live window and defaults to the selected one.
1059 This function is like `set-window-point' with one exception: If
1060 WINDOW is selected, it moves `point' of WINDOW's buffer to POS
1061 regardless of whether that buffer is current or not."
1062 (setq window
(window-normalize-window window t
))
1063 (if (eq window
(selected-window))
1064 (with-current-buffer (window-buffer window
)
1066 (set-window-point window pos
)))
1068 (defun window-at-side-p (&optional window side
)
1069 "Return t if WINDOW is at SIDE of its containing frame.
1070 WINDOW can be any window and defaults to the selected one. SIDE
1071 can be any of the symbols `left', `top', `right' or `bottom'.
1072 The default value nil is handled like `bottom'."
1073 (setq window
(window-normalize-window window
))
1078 ((eq side
'right
) 2)
1079 ((memq side
'(bottom nil
)) 3))))
1080 (= (nth edge
(window-edges window
))
1081 (nth edge
(window-edges (frame-root-window window
))))))
1083 (defun windows-at-side (&optional frame side
)
1084 "Return list of all windows on SIDE of FRAME.
1085 FRAME must be a live frame and defaults to the selected frame.
1086 SIDE can be any of the symbols `left', `top', `right' or
1087 `bottom'. The default value nil is handled like `bottom'."
1088 (setq frame
(window-normalize-frame frame
))
1092 (when (window-at-side-p window side
)
1093 (setq windows
(cons window windows
))))
1095 (nreverse windows
)))
1097 (defun window-in-direction-2 (window posn
&optional horizontal
)
1098 "Support function for `window-in-direction'."
1100 (let ((top (window-top-line window
)))
1103 (- posn top
(window-total-height window
))))
1104 (let ((left (window-left-column window
)))
1107 (- posn left
(window-total-width window
))))))
1109 (defun window-in-direction (direction &optional window ignore
)
1110 "Return window in DIRECTION as seen from WINDOW.
1111 DIRECTION must be one of `above', `below', `left' or `right'.
1112 WINDOW must be a live window and defaults to the selected one.
1113 IGNORE, when non-nil means a window can be returned even if its
1114 `no-other-window' parameter is non-nil."
1115 (setq window
(window-normalize-window window t
))
1116 (unless (memq direction
'(above below left right
))
1117 (error "Wrong direction %s" direction
))
1118 (let* ((frame (window-frame window
))
1119 (hor (memq direction
'(left right
)))
1121 (window-left-column window
)
1122 (window-top-line window
)))
1123 (last (+ first
(if hor
1124 (window-total-width window
)
1125 (window-total-height window
))))
1126 (posn-cons (nth 6 (posn-at-point (window-point-1 window
) window
)))
1127 ;; The column / row value of `posn-at-point' can be nil for the
1128 ;; mini-window, guard against that.
1130 (+ (or (cdr posn-cons
) 1) (window-top-line window
))
1131 (+ (or (car posn-cons
) 1) (window-left-column window
))))
1134 ((eq direction
'below
) (frame-height frame
))
1135 ((eq direction
'right
) (frame-width frame
))
1137 (best-edge-2 best-edge
)
1138 (best-diff-2 (if hor
(frame-height frame
) (frame-width frame
)))
1139 best best-2 best-diff-2-new
)
1142 (let* ((w-top (window-top-line w
))
1143 (w-left (window-left-column w
)))
1146 ;; Ignore ourselves.
1147 (and (window-parameter w
'no-other-window
)
1148 ;; Ignore W unless IGNORE is non-nil.
1152 ((and (<= w-top posn
)
1153 (< posn
(+ w-top
(window-total-height w
))))
1154 ;; W is to the left or right of WINDOW and covers POSN.
1155 (when (or (and (eq direction
'left
)
1156 (<= w-left first
) (> w-left best-edge
))
1157 (and (eq direction
'right
)
1158 (>= w-left last
) (< w-left best-edge
)))
1159 (setq best-edge w-left
)
1161 ((and (or (and (eq direction
'left
)
1162 (<= (+ w-left
(window-total-width w
)) first
))
1163 (and (eq direction
'right
) (<= last w-left
)))
1164 ;; W is to the left or right of WINDOW but does not
1166 (setq best-diff-2-new
1167 (window-in-direction-2 w posn hor
))
1168 (or (< best-diff-2-new best-diff-2
)
1169 (and (= best-diff-2-new best-diff-2
)
1170 (if (eq direction
'left
)
1171 (> w-left best-edge-2
)
1172 (< w-left best-edge-2
)))))
1173 (setq best-edge-2 w-left
)
1174 (setq best-diff-2 best-diff-2-new
)
1178 ((and (<= w-left posn
)
1179 (< posn
(+ w-left
(window-total-width w
))))
1180 ;; W is above or below WINDOW and covers POSN.
1181 (when (or (and (eq direction
'above
)
1182 (<= w-top first
) (> w-top best-edge
))
1183 (and (eq direction
'below
)
1184 (>= w-top first
) (< w-top best-edge
)))
1185 (setq best-edge w-top
)
1187 ((and (or (and (eq direction
'above
)
1188 (<= (+ w-top
(window-total-height w
)) first
))
1189 (and (eq direction
'below
) (<= last w-top
)))
1190 ;; W is above or below WINDOW but does not cover POSN.
1191 (setq best-diff-2-new
1192 (window-in-direction-2 w posn hor
))
1193 (or (< best-diff-2-new best-diff-2
)
1194 (and (= best-diff-2-new best-diff-2
)
1195 (if (eq direction
'above
)
1196 (> w-top best-edge-2
)
1197 (< w-top best-edge-2
)))))
1198 (setq best-edge-2 w-top
)
1199 (setq best-diff-2 best-diff-2-new
)
1200 (setq best-2 w
)))))))
1201 (window-frame window
))
1204 (defun get-window-with-predicate (predicate &optional minibuf all-frames default
)
1205 "Return a live window satisfying PREDICATE.
1206 More precisely, cycle through all windows calling the function
1207 PREDICATE on each one of them with the window as its sole
1208 argument. Return the first window for which PREDICATE returns
1209 non-nil. Windows are scanned starting with the window following
1210 the selcted window. If no window satisfies PREDICATE, return
1213 MINIBUF t means include the minibuffer window even if the
1214 minibuffer is not active. MINIBUF nil or omitted means include
1215 the minibuffer window only if the minibuffer is active. Any
1216 other value means do not include the minibuffer window even if
1217 the minibuffer is active.
1219 ALL-FRAMES nil or omitted means consider all windows on the selected
1220 frame, plus the minibuffer window if specified by the MINIBUF
1221 argument. If the minibuffer counts, consider all windows on all
1222 frames that share that minibuffer too. The following non-nil
1223 values of ALL-FRAMES have special meanings:
1225 - t means consider all windows on all existing frames.
1227 - `visible' means consider all windows on all visible frames on
1228 the current terminal.
1230 - 0 (the number zero) means consider all windows on all visible
1231 and iconified frames on the current terminal.
1233 - A frame means consider all windows on that frame only.
1235 Anything else means consider all windows on the selected frame
1238 (dolist (window (window-list-1
1239 (next-window nil minibuf all-frames
)
1240 minibuf all-frames
))
1241 (when (funcall predicate window
)
1242 (throw 'found window
)))
1245 (defalias 'some-window
'get-window-with-predicate
)
1247 (defun get-lru-window (&optional all-frames dedicated
)
1248 "Return the least recently used window on frames specified by ALL-FRAMES.
1249 Return a full-width window if possible. A minibuffer window is
1250 never a candidate. A dedicated window is never a candidate
1251 unless DEDICATED is non-nil, so if all windows are dedicated, the
1252 value is nil. Avoid returning the selected window if possible.
1254 The following non-nil values of the optional argument ALL-FRAMES
1255 have special meanings:
1257 - t means consider all windows on all existing frames.
1259 - `visible' means consider all windows on all visible frames on
1260 the current terminal.
1262 - 0 (the number zero) means consider all windows on all visible
1263 and iconified frames on the current terminal.
1265 - A frame means consider all windows on that frame only.
1267 Any other value of ALL-FRAMES means consider all windows on the
1268 selected frame and no others."
1269 (let (best-window best-time second-best-window second-best-time time
)
1270 (dolist (window (window-list-1 nil
'nomini all-frames
))
1271 (when (or dedicated
(not (window-dedicated-p window
)))
1272 (setq time
(window-use-time window
))
1273 (if (or (eq window
(selected-window))
1274 (not (window-full-width-p window
)))
1275 (when (or (not second-best-time
) (< time second-best-time
))
1276 (setq second-best-time time
)
1277 (setq second-best-window window
))
1278 (when (or (not best-time
) (< time best-time
))
1279 (setq best-time time
)
1280 (setq best-window window
)))))
1281 (or best-window second-best-window
)))
1283 (defun get-mru-window (&optional all-frames
)
1284 "Return the most recently used window on frames specified by ALL-FRAMES.
1285 Do not return a minibuffer window.
1287 The following non-nil values of the optional argument ALL-FRAMES
1288 have special meanings:
1290 - t means consider all windows on all existing frames.
1292 - `visible' means consider all windows on all visible frames on
1293 the current terminal.
1295 - 0 (the number zero) means consider all windows on all visible
1296 and iconified frames on the current terminal.
1298 - A frame means consider all windows on that frame only.
1300 Any other value of ALL-FRAMES means consider all windows on the
1301 selected frame and no others."
1302 (let (best-window best-time time
)
1303 (dolist (window (window-list-1 nil
'nomini all-frames
))
1304 (setq time
(window-use-time window
))
1305 (when (or (not best-time
) (> time best-time
))
1306 (setq best-time time
)
1307 (setq best-window window
)))
1310 (defun get-largest-window (&optional all-frames dedicated
)
1311 "Return the largest window on frames specified by ALL-FRAMES.
1312 A minibuffer window is never a candidate. A dedicated window is
1313 never a candidate unless DEDICATED is non-nil, so if all windows
1314 are dedicated, the value is nil.
1316 The following non-nil values of the optional argument ALL-FRAMES
1317 have special meanings:
1319 - t means consider all windows on all existing frames.
1321 - `visible' means consider all windows on all visible frames on
1322 the current terminal.
1324 - 0 (the number zero) means consider all windows on all visible
1325 and iconified frames on the current terminal.
1327 - A frame means consider all windows on that frame only.
1329 Any other value of ALL-FRAMES means consider all windows on the
1330 selected frame and no others."
1333 (dolist (window (window-list-1 nil
'nomini all-frames
))
1334 (when (or dedicated
(not (window-dedicated-p window
)))
1335 (setq size
(* (window-total-size window
)
1336 (window-total-size window t
)))
1337 (when (> size best-size
)
1338 (setq best-size size
)
1339 (setq best-window window
))))
1342 (defun get-buffer-window-list (&optional buffer-or-name minibuf all-frames
)
1343 "Return list of all windows displaying BUFFER-OR-NAME, or nil if none.
1344 BUFFER-OR-NAME may be a buffer or the name of an existing buffer
1345 and defaults to the current buffer. Windows are scanned starting
1346 with the selected window.
1348 MINIBUF t means include the minibuffer window even if the
1349 minibuffer is not active. MINIBUF nil or omitted means include
1350 the minibuffer window only if the minibuffer is active. Any
1351 other value means do not include the minibuffer window even if
1352 the minibuffer is active.
1354 ALL-FRAMES nil or omitted means consider all windows on the
1355 selected frame, plus the minibuffer window if specified by the
1356 MINIBUF argument. If the minibuffer counts, consider all windows
1357 on all frames that share that minibuffer too. The following
1358 non-nil values of ALL-FRAMES have special meanings:
1360 - t means consider all windows on all existing frames.
1362 - `visible' means consider all windows on all visible frames on
1363 the current terminal.
1365 - 0 (the number zero) means consider all windows on all visible
1366 and iconified frames on the current terminal.
1368 - A frame means consider all windows on that frame only.
1370 Anything else means consider all windows on the selected frame
1372 (let ((buffer (window-normalize-buffer buffer-or-name
))
1374 (dolist (window (window-list-1 (selected-window) minibuf all-frames
))
1375 (when (eq (window-buffer window
) buffer
)
1376 (setq windows
(cons window windows
))))
1377 (nreverse windows
)))
1379 (defun minibuffer-window-active-p (window)
1380 "Return t if WINDOW is the currently active minibuffer window."
1381 (eq window
(active-minibuffer-window)))
1383 (defun count-windows (&optional minibuf
)
1384 "Return the number of live windows on the selected frame.
1385 The optional argument MINIBUF specifies whether the minibuffer
1386 window shall be counted. See `walk-windows' for the precise
1387 meaning of this argument."
1388 (length (window-list-1 nil minibuf
)))
1390 ;;; Resizing windows.
1391 (defun window--resize-reset (&optional frame horizontal
)
1392 "Reset resize values for all windows on FRAME.
1393 FRAME defaults to the selected frame.
1395 This function stores the current value of `window-total-size' applied
1396 with argument HORIZONTAL in the new total size of all windows on
1397 FRAME. It also resets the new normal size of each of these
1399 (window--resize-reset-1
1400 (frame-root-window (window-normalize-frame frame
)) horizontal
))
1402 (defun window--resize-reset-1 (window horizontal
)
1403 "Internal function of `window--resize-reset'."
1404 ;; Register old size in the new total size.
1405 (set-window-new-total window
(window-total-size window horizontal
))
1406 ;; Reset new normal size.
1407 (set-window-new-normal window
)
1408 (when (window-child window
)
1409 (window--resize-reset-1 (window-child window
) horizontal
))
1410 (when (window-right window
)
1411 (window--resize-reset-1 (window-right window
) horizontal
)))
1413 ;; The following routine is used to manually resize the minibuffer
1414 ;; window and is currently used, for example, by ispell.el.
1415 (defun window--resize-mini-window (window delta
)
1416 "Resize minibuffer window WINDOW by DELTA lines.
1417 If WINDOW cannot be resized by DELTA lines make it as large \(or
1418 as small) as possible but don't signal an error."
1419 (when (window-minibuffer-p window
)
1420 (let* ((frame (window-frame window
))
1421 (root (frame-root-window frame
))
1422 (height (window-total-size window
))
1424 (- (window-total-size root
)
1425 (window-min-size root
))))
1428 ((<= (+ height delta
) 0)
1429 (setq delta
(- (- height
1))))
1430 ((> delta min-delta
)
1431 (setq delta min-delta
)))
1434 (window--resize-reset frame
)
1435 ;; Ideally we should be able to resize just the last child of root
1436 ;; here. See the comment in `resize-root-window-vertically' for
1437 ;; why we do not do that.
1438 (window--resize-this-window root
(- delta
) nil nil t
)
1439 (set-window-new-total window
(+ height delta
))
1440 ;; The following routine catches the case where we want to resize
1441 ;; a minibuffer-only frame.
1442 (resize-mini-window-internal window
))))
1444 (defun window-resize (window delta
&optional horizontal ignore
)
1445 "Resize WINDOW vertically by DELTA lines.
1446 WINDOW can be an arbitrary window and defaults to the selected
1447 one. An attempt to resize the root window of a frame will raise
1450 DELTA a positive number means WINDOW shall be enlarged by DELTA
1451 lines. DELTA negative means WINDOW shall be shrunk by -DELTA
1454 Optional argument HORIZONTAL non-nil means resize WINDOW
1455 horizontally by DELTA columns. In this case a positive DELTA
1456 means enlarge WINDOW by DELTA columns. DELTA negative means
1457 WINDOW shall be shrunk by -DELTA columns.
1459 Optional argument IGNORE non-nil means ignore any restrictions
1460 imposed by fixed size windows, `window-min-height' or
1461 `window-min-width' settings. IGNORE any window means ignore
1462 restrictions for that window only. IGNORE equal `safe' means
1463 live windows may get as small as `window-safe-min-height' lines
1464 and `window-safe-min-width' columns.
1466 This function resizes other windows proportionally and never
1467 deletes any windows. If you want to move only the low (right)
1468 edge of WINDOW consider using `adjust-window-trailing-edge'
1470 (setq window
(window-normalize-window window
))
1471 (let* ((frame (window-frame window
))
1474 ((eq window
(frame-root-window frame
))
1475 (error "Cannot resize the root window of a frame"))
1476 ((window-minibuffer-p window
)
1477 (window--resize-mini-window window delta
))
1478 ((window-resizable-p window delta horizontal ignore
)
1479 (window--resize-reset frame horizontal
)
1480 (window--resize-this-window window delta horizontal ignore t
)
1481 (if (and (not (window-splits window
))
1482 (window-combined-p window horizontal
)
1483 (setq sibling
(or (window-right window
) (window-left window
)))
1484 (window-sizable-p sibling
(- delta
) horizontal ignore
))
1485 ;; If window-splits returns nil for WINDOW, WINDOW is part of
1486 ;; an iso-combination, and WINDOW's neighboring right or left
1487 ;; sibling can be resized as requested, resize that sibling.
1490 (window-total-size (window-parent window
) horizontal
))))
1491 (window--resize-this-window sibling
(- delta
) horizontal nil t
)
1492 (set-window-new-normal
1493 window
(+ (window-normal-size window horizontal
)
1495 (set-window-new-normal
1496 sibling
(- (window-normal-size sibling horizontal
)
1498 ;; Otherwise, resize all other windows in the same combination.
1499 (window--resize-siblings window delta horizontal ignore
))
1500 (window-resize-apply frame horizontal
))
1502 (error "Cannot resize window %s" window
)))))
1504 (defsubst window--resize-child-windows-skip-p
(window)
1505 "Return non-nil if WINDOW shall be skipped by resizing routines."
1506 (memq (window-new-normal window
) '(ignore stuck skip
)))
1508 (defun window--resize-child-windows-normal (parent horizontal window this-delta
&optional trail other-delta
)
1509 "Recursively set new normal height of child windows of window PARENT.
1510 HORIZONTAL non-nil means set the new normal width of these
1511 windows. WINDOW specifies a child window of PARENT that has been
1512 resized by THIS-DELTA lines \(columns).
1514 Optional argument TRAIL either 'before or 'after means set values
1515 for windows before or after WINDOW only. Optional argument
1516 OTHER-DELTA a number specifies that this many lines \(columns)
1517 have been obtained from \(or returned to) an ancestor window of
1518 PARENT in order to resize WINDOW."
1519 (let* ((delta-normal
1520 (if (and (= (- this-delta
) (window-total-size window horizontal
))
1521 (zerop other-delta
))
1522 ;; When WINDOW gets deleted and we can return its entire
1523 ;; space to its siblings, use WINDOW's normal size as the
1525 (- (window-normal-size window horizontal
))
1526 ;; In any other case calculate the normal delta from the
1527 ;; relation of THIS-DELTA to the total size of PARENT.
1528 (/ (float this-delta
) (window-total-size parent horizontal
))))
1529 (sub (window-child parent
))
1531 (skip (eq trail
'after
)))
1533 ;; Set parent-normal to the sum of the normal sizes of all child
1534 ;; windows of PARENT that shall be resized, excluding only WINDOW
1535 ;; and any windows specified by the optional TRAIL argument.
1539 (setq skip
(eq trail
'before
)))
1543 (+ parent-normal
(window-normal-size sub horizontal
)))))
1544 (setq sub
(window-right sub
)))
1546 ;; Set the new normal size of all child windows of PARENT from what
1547 ;; they should have contributed for recovering THIS-DELTA lines
1549 (setq sub
(window-child parent
))
1550 (setq skip
(eq trail
'after
))
1554 (setq skip
(eq trail
'before
)))
1557 (let ((old-normal (window-normal-size sub horizontal
)))
1558 (set-window-new-normal
1559 sub
(min 1.0 ; Don't get larger than 1.
1561 (* (/ old-normal parent-normal
)
1563 ;; Don't drop below 0.
1565 (setq sub
(window-right sub
)))
1567 (when (numberp other-delta
)
1568 ;; Set the new normal size of windows from what they should have
1569 ;; contributed for recovering OTHER-DELTA lines (columns).
1570 (setq delta-normal
(/ (float (window-total-size parent horizontal
))
1571 (+ (window-total-size parent horizontal
)
1573 (setq sub
(window-child parent
))
1574 (setq skip
(eq trail
'after
))
1578 (setq skip
(eq trail
'before
)))
1581 (set-window-new-normal
1582 sub
(min 1.0 ; Don't get larger than 1.
1583 (max (* (window-new-normal sub
) delta-normal
)
1584 ;; Don't drop below 0.
1586 (setq sub
(window-right sub
))))
1588 ;; Set the new normal size of WINDOW to what is left by the sum of
1589 ;; the normal sizes of its siblings.
1590 (set-window-new-normal
1593 (setq sub
(window-child parent
))
1597 ((not (numberp (window-new-normal sub
)))
1598 (setq sum
(+ sum
(window-normal-size sub horizontal
))))
1600 (setq sum
(+ sum
(window-new-normal sub
)))))
1601 (setq sub
(window-right sub
)))
1602 ;; Don't get larger than 1 or smaller than 0.
1603 (min 1.0 (max (- 1.0 sum
) 0.0))))))
1605 (defun window--resize-child-windows (parent delta
&optional horizontal window ignore trail edge
)
1606 "Resize child windows of window PARENT vertically by DELTA lines.
1607 PARENT must be a vertically combined internal window.
1609 Optional argument HORIZONTAL non-nil means resize child windows of
1610 PARENT horizontally by DELTA columns. In this case PARENT must
1611 be a horizontally combined internal window.
1613 WINDOW, if specified, must denote a child window of PARENT that
1614 is resized by DELTA lines.
1616 Optional argument IGNORE non-nil means ignore any restrictions
1617 imposed by fixed size windows, `window-min-height' or
1618 `window-min-width' settings. IGNORE equal `safe' means live
1619 windows may get as small as `window-safe-min-height' lines and
1620 `window-safe-min-width' columns. IGNORE any window means ignore
1621 restrictions for that window only.
1623 Optional arguments TRAIL and EDGE, when non-nil, restrict the set
1624 of windows that shall be resized. If TRAIL equals `before',
1625 resize only windows on the left or above EDGE. If TRAIL equals
1626 `after', resize only windows on the right or below EDGE. Also,
1627 preferably only resize windows adjacent to EDGE.
1629 Return the symbol `normalized' if new normal sizes have been
1630 already set by this routine."
1631 (let* ((first (window-child parent
))
1633 (parent-total (+ (window-total-size parent horizontal
) delta
))
1634 best-window best-value
)
1636 (if (and edge
(memq trail
'(before after
))
1639 (while (and (window-right sub
)
1640 (or (and (eq trail
'before
)
1641 (not (window--resize-child-windows-skip-p
1642 (window-right sub
))))
1643 (and (eq trail
'after
)
1644 (window--resize-child-windows-skip-p sub
))))
1645 (setq sub
(window-right sub
)))
1648 (if (eq trail
'before
)
1649 (= (+ (window-left-column sub
)
1650 (window-total-size sub t
))
1652 (= (window-left-column sub
) edge
))
1653 (if (eq trail
'before
)
1654 (= (+ (window-top-line sub
)
1655 (window-total-size sub
))
1657 (= (window-top-line sub
) edge
)))
1658 (window-sizable-p sub delta horizontal ignore
))
1659 ;; Resize only windows adjacent to EDGE.
1661 (window--resize-this-window
1662 sub delta horizontal ignore t trail edge
)
1663 (if (and window
(eq (window-parent sub
) parent
))
1665 ;; Assign new normal sizes.
1666 (set-window-new-normal
1667 sub
(/ (float (window-new-total sub
)) parent-total
))
1668 (set-window-new-normal
1669 window
(- (window-normal-size window horizontal
)
1670 (- (window-new-normal sub
)
1671 (window-normal-size sub horizontal
)))))
1672 (window--resize-child-windows-normal
1673 parent horizontal sub
0 trail delta
))
1674 ;; Return 'normalized to notify `window--resize-siblings' that
1675 ;; normal sizes have been already set.
1677 ;; Resize all windows proportionally.
1681 ((or (window--resize-child-windows-skip-p sub
)
1682 ;; Ignore windows to skip and fixed-size child windows -
1683 ;; in the latter case make it a window to skip.
1685 (window-size-fixed-p sub horizontal
)
1686 (set-window-new-normal sub
'ignore
))))
1688 ;; When shrinking store the number of lines/cols we can get
1689 ;; from this window here together with the total/normal size
1691 (set-window-new-normal
1694 ;; We used to call this with NODOWN t, "fixed" 2011-05-11.
1695 (window-min-delta sub horizontal ignore trail t
) ; t)
1696 (- (/ (float (window-total-size sub horizontal
))
1698 (window-normal-size sub horizontal
)))))
1700 ;; When enlarging store the total/normal size factor only
1701 (set-window-new-normal
1703 (- (/ (float (window-total-size sub horizontal
))
1705 (window-normal-size sub horizontal
)))))
1707 (setq sub
(window-right sub
)))
1711 ;; Shrink windows by delta.
1712 (setq best-window t
)
1713 (while (and best-window
(not (zerop delta
)))
1715 (setq best-window nil
)
1716 (setq best-value most-negative-fixnum
)
1718 (when (and (consp (window-new-normal sub
))
1719 (not (zerop (car (window-new-normal sub
))))
1720 (> (cdr (window-new-normal sub
)) best-value
))
1721 (setq best-window sub
)
1722 (setq best-value
(cdr (window-new-normal sub
))))
1724 (setq sub
(window-right sub
)))
1727 (setq delta
(1+ delta
)))
1728 (set-window-new-total best-window -
1 t
)
1729 (set-window-new-normal
1731 (if (= (car (window-new-normal best-window
)) 1)
1732 'skip
; We can't shrink best-window any further.
1733 (cons (1- (car (window-new-normal best-window
)))
1734 (- (/ (float (window-new-total best-window
))
1736 (window-normal-size best-window horizontal
)))))))
1738 ;; Enlarge windows by delta.
1739 (setq best-window t
)
1740 (while (and best-window
(not (zerop delta
)))
1742 (setq best-window nil
)
1743 (setq best-value most-positive-fixnum
)
1745 (when (and (numberp (window-new-normal sub
))
1746 (< (window-new-normal sub
) best-value
))
1747 (setq best-window sub
)
1748 (setq best-value
(window-new-normal sub
)))
1750 (setq sub
(window-right sub
)))
1753 (setq delta
(1- delta
)))
1754 (set-window-new-total best-window
1 t
)
1755 (set-window-new-normal
1757 (- (/ (float (window-new-total best-window
))
1759 (window-normal-size best-window horizontal
))))))
1764 (when (or (consp (window-new-normal sub
))
1765 (numberp (window-new-normal sub
)))
1766 ;; Reset new normal size fields so `window-resize-apply'
1767 ;; won't use them to apply new sizes.
1768 (set-window-new-normal sub
))
1770 (unless (eq (window-new-normal sub
) 'ignore
)
1771 ;; Resize this window's child windows (back-engineering
1772 ;; delta from sub's old and new total sizes).
1773 (let ((delta (- (window-new-total sub
)
1774 (window-total-size sub horizontal
))))
1775 (unless (and (zerop delta
) (not trail
))
1776 ;; For the TRAIL non-nil case we have to resize SUB
1777 ;; recursively even if it's size does not change.
1778 (window--resize-this-window
1779 sub delta horizontal ignore nil trail edge
))))
1780 (setq sub
(window-right sub
)))))))
1782 (defun window--resize-siblings (window delta
&optional horizontal ignore trail edge
)
1783 "Resize other windows when WINDOW is resized vertically by DELTA lines.
1784 Optional argument HORIZONTAL non-nil means resize other windows
1785 when WINDOW is resized horizontally by DELTA columns. WINDOW
1786 itself is not resized by this function.
1788 Optional argument IGNORE non-nil means ignore any restrictions
1789 imposed by fixed size windows, `window-min-height' or
1790 `window-min-width' settings. IGNORE equal `safe' means live
1791 windows may get as small as `window-safe-min-height' lines and
1792 `window-safe-min-width' columns. IGNORE any window means ignore
1793 restrictions for that window only.
1795 Optional arguments TRAIL and EDGE, when non-nil, refine the set
1796 of windows that shall be resized. If TRAIL equals `before',
1797 resize only windows on the left or above EDGE. If TRAIL equals
1798 `after', resize only windows on the right or below EDGE. Also,
1799 preferably only resize windows adjacent to EDGE."
1800 (when (window-parent window
)
1801 (let* ((parent (window-parent window
))
1802 (sub (window-child parent
)))
1803 (if (window-combined-p sub horizontal
)
1804 ;; In an iso-combination try to extract DELTA from WINDOW's
1807 (skip (eq trail
'after
))
1808 this-delta other-delta
)
1809 ;; Decide which windows shall be left alone.
1813 ;; Make sure WINDOW is left alone when
1814 ;; resizing its siblings.
1815 (set-window-new-normal sub
'ignore
)
1816 (setq skip
(eq trail
'before
)))
1818 ;; Make sure this sibling is left alone when
1819 ;; resizing its siblings.
1820 (set-window-new-normal sub
'ignore
))
1821 ((or (window-size-ignore sub ignore
)
1822 (not (window-size-fixed-p sub horizontal
)))
1823 ;; Set this-delta to t to signal that we found a sibling
1824 ;; of WINDOW whose size is not fixed.
1825 (setq this-delta t
)))
1827 (setq sub
(window-right sub
)))
1829 ;; Set this-delta to what we can get from WINDOW's siblings.
1830 (if (= (- delta
) (window-total-size window horizontal
))
1831 ;; A deletion, presumably. We must handle this case
1832 ;; specially since `window-resizable' can't be used.
1834 ;; There's at least one resizable sibling we can
1835 ;; give WINDOW's size to.
1836 (setq this-delta delta
)
1837 ;; No resizable sibling exists.
1838 (setq this-delta
0))
1839 ;; Any other form of resizing.
1841 (window-resizable window delta horizontal ignore trail t
)))
1843 ;; Set other-delta to what we still have to get from
1844 ;; ancestor windows of parent.
1845 (setq other-delta
(- delta this-delta
))
1846 (unless (zerop other-delta
)
1847 ;; Unless we got everything from WINDOW's siblings, PARENT
1848 ;; must be resized by other-delta lines or columns.
1849 (set-window-new-total parent other-delta
'add
))
1851 (if (zerop this-delta
)
1852 ;; We haven't got anything from WINDOW's siblings but we
1853 ;; must update the normal sizes to respect other-delta.
1854 (window--resize-child-windows-normal
1855 parent horizontal window this-delta trail other-delta
)
1856 ;; We did get something from WINDOW's siblings which means
1857 ;; we have to resize their child windows.
1858 (unless (eq (window--resize-child-windows
1859 parent
(- this-delta
) horizontal
1860 window ignore trail edge
)
1861 ;; If `window--resize-child-windows' returns
1862 ;; 'normalized, this means it has set the
1863 ;; normal sizes already.
1865 ;; Set the normal sizes.
1866 (window--resize-child-windows-normal
1867 parent horizontal window this-delta trail other-delta
))
1868 ;; Set DELTA to what we still have to get from ancestor
1870 (setq delta other-delta
)))
1872 ;; In an ortho-combination all siblings of WINDOW must be
1873 ;; resized by DELTA.
1874 (set-window-new-total parent delta
'add
)
1876 (unless (eq sub window
)
1877 (window--resize-this-window sub delta horizontal ignore t
))
1878 (setq sub
(window-right sub
))))
1880 (unless (zerop delta
)
1882 (window--resize-siblings
1883 parent delta horizontal ignore trail edge
)))))
1885 (defun window--resize-this-window (window delta
&optional horizontal ignore add trail edge
)
1886 "Resize WINDOW vertically by DELTA lines.
1887 Optional argument HORIZONTAL non-nil means resize WINDOW
1888 horizontally by DELTA columns.
1890 Optional argument IGNORE non-nil means ignore any restrictions
1891 imposed by fixed size windows, `window-min-height' or
1892 `window-min-width' settings. IGNORE equal `safe' means live
1893 windows may get as small as `window-safe-min-height' lines and
1894 `window-safe-min-width' columns. IGNORE any window means ignore
1895 restrictions for that window only.
1897 Optional argument ADD non-nil means add DELTA to the new total
1900 Optional arguments TRAIL and EDGE, when non-nil, refine the set
1901 of windows that shall be resized. If TRAIL equals `before',
1902 resize only windows on the left or above EDGE. If TRAIL equals
1903 `after', resize only windows on the right or below EDGE. Also,
1904 preferably only resize windows adjacent to EDGE.
1906 This function recursively resizes WINDOW's child windows to fit the
1907 new size. Make sure that WINDOW is `window-resizable' before
1908 calling this function. Note that this function does not resize
1909 siblings of WINDOW or WINDOW's parent window. You have to
1910 eventually call `window-resize-apply' in order to make resizing
1911 actually take effect."
1913 ;; Add DELTA to the new total size of WINDOW.
1914 (set-window-new-total window delta t
))
1916 (let ((sub (window-child window
)))
1919 ((window-combined-p sub horizontal
)
1920 ;; In an iso-combination resize child windows according to their
1922 (window--resize-child-windows
1923 window delta horizontal nil ignore trail edge
))
1924 ;; In an ortho-combination resize each child window by DELTA.
1927 (window--resize-this-window
1928 sub delta horizontal ignore t trail edge
)
1929 (setq sub
(window-right sub
)))))))
1931 (defun window--resize-root-window (window delta horizontal ignore
)
1932 "Resize root window WINDOW vertically by DELTA lines.
1933 HORIZONTAL non-nil means resize root window WINDOW horizontally
1936 IGNORE non-nil means ignore any restrictions imposed by fixed
1937 size windows, `window-min-height' or `window-min-width' settings.
1939 This function is only called by the frame resizing routines. It
1940 resizes windows proportionally and never deletes any windows."
1941 (when (and (windowp window
) (numberp delta
)
1942 (window-sizable-p window delta horizontal ignore
))
1943 (window--resize-reset (window-frame window
) horizontal
)
1944 (window--resize-this-window window delta horizontal ignore t
)))
1946 (defun window--resize-root-window-vertically (window delta
)
1947 "Resize root window WINDOW vertically by DELTA lines.
1948 If DELTA is less than zero and we can't shrink WINDOW by DELTA
1949 lines, shrink it as much as possible. If DELTA is greater than
1950 zero, this function can resize fixed-size windows in order to
1951 recover the necessary lines.
1953 Return the number of lines that were recovered.
1955 This function is only called by the minibuffer window resizing
1956 routines. It resizes windows proportionally and never deletes
1958 (when (numberp delta
)
1962 (setq delta
(window-sizable window delta
)))
1964 (unless (window-sizable window delta
)
1967 (window--resize-reset (window-frame window
))
1968 ;; Ideally, we would resize just the last window in a combination
1969 ;; but that's not feasible for the following reason: If we grow
1970 ;; the minibuffer window and the last window cannot be shrunk any
1971 ;; more, we shrink another window instead. But if we then shrink
1972 ;; the minibuffer window again, the last window might get enlarged
1973 ;; and the state after shrinking is not the state before growing.
1974 ;; So, in practice, we'd need a history variable to record how to
1975 ;; proceed. But I'm not sure how such a variable could work with
1976 ;; repeated minibuffer window growing steps.
1977 (window--resize-this-window window delta nil ignore t
)
1980 (defun adjust-window-trailing-edge (window delta
&optional horizontal
)
1981 "Move WINDOW's bottom edge by DELTA lines.
1982 Optional argument HORIZONTAL non-nil means move WINDOW's right
1983 edge by DELTA columns. WINDOW defaults to the selected window.
1985 If DELTA is greater zero, then move the edge downwards or to the
1986 right. If DELTA is less than zero, move the edge upwards or to
1987 the left. If the edge can't be moved by DELTA lines or columns,
1988 move it as far as possible in the desired direction."
1989 (setq window
(window-normalize-window window
))
1990 (let ((frame (window-frame window
))
1992 left this-delta min-delta max-delta failed
)
1993 ;; Find the edge we want to move.
1994 (while (and (or (not (window-combined-p right horizontal
))
1995 (not (window-right right
)))
1996 (setq right
(window-parent right
))))
1998 ((and (not right
) (not horizontal
) (not resize-mini-windows
)
1999 (eq (window-frame (minibuffer-window frame
)) frame
))
2000 (window--resize-mini-window (minibuffer-window frame
) (- delta
)))
2001 ((or (not (setq left right
)) (not (setq right
(window-right right
))))
2003 (error "No window on the right of this one")
2004 (error "No window below this one")))
2006 ;; Set LEFT to the first resizable window on the left. This step is
2007 ;; needed to handle fixed-size windows.
2008 (while (and left
(window-size-fixed-p left horizontal
))
2010 (or (window-left left
)
2012 (while (and (setq left
(window-parent left
))
2013 (not (window-combined-p left horizontal
))))
2014 (window-left left
)))))
2017 (error "No resizable window on the left of this one")
2018 (error "No resizable window above this one")))
2020 ;; Set RIGHT to the first resizable window on the right. This step
2021 ;; is needed to handle fixed-size windows.
2022 (while (and right
(window-size-fixed-p right horizontal
))
2024 (or (window-right right
)
2026 (while (and (setq right
(window-parent right
))
2027 (not (window-combined-p right horizontal
))))
2028 (window-right right
)))))
2031 (error "No resizable window on the right of this one")
2032 (error "No resizable window below this one")))
2034 ;; LEFT and RIGHT (which might be both internal windows) are now the
2035 ;; two windows we want to resize.
2038 (setq max-delta
(window-max-delta-1 left
0 horizontal nil
'after
))
2039 (setq min-delta
(window-min-delta-1 right
(- delta
) horizontal nil
'before
))
2040 (when (or (< max-delta delta
) (> min-delta
(- delta
)))
2041 ;; We can't get the whole DELTA - move as far as possible.
2042 (setq delta
(min max-delta
(- min-delta
))))
2043 (unless (zerop delta
)
2045 (window--resize-reset frame horizontal
)
2046 ;; Try to enlarge LEFT first.
2047 (setq this-delta
(window-resizable left delta horizontal
))
2048 (unless (zerop this-delta
)
2049 (window--resize-this-window
2050 left this-delta horizontal nil t
'before
2052 (+ (window-left-column left
) (window-total-size left t
))
2053 (+ (window-top-line left
) (window-total-size left
)))))
2054 ;; Shrink windows on right of LEFT.
2055 (window--resize-siblings
2056 left delta horizontal nil
'after
2058 (window-left-column right
)
2059 (window-top-line right
)))))
2061 (setq max-delta
(window-max-delta-1 right
0 horizontal nil
'before
))
2062 (setq min-delta
(window-min-delta-1 left delta horizontal nil
'after
))
2063 (when (or (< max-delta
(- delta
)) (> min-delta delta
))
2064 ;; We can't get the whole DELTA - move as far as possible.
2065 (setq delta
(max (- max-delta
) min-delta
)))
2066 (unless (zerop delta
)
2068 (window--resize-reset frame horizontal
)
2069 ;; Try to enlarge RIGHT.
2070 (setq this-delta
(window-resizable right
(- delta
) horizontal
))
2071 (unless (zerop this-delta
)
2072 (window--resize-this-window
2073 right this-delta horizontal nil t
'after
2075 (window-left-column right
)
2076 (window-top-line right
))))
2077 ;; Shrink windows on left of RIGHT.
2078 (window--resize-siblings
2079 right
(- delta
) horizontal nil
'before
2081 (+ (window-left-column left
) (window-total-size left t
))
2082 (+ (window-top-line left
) (window-total-size left
)))))))
2083 (unless (zerop delta
)
2084 ;; Don't report an error in the standard case.
2085 (unless (window-resize-apply frame horizontal
)
2086 ;; But do report an error if applying the changes fails.
2087 (error "Failed adjusting window %s" window
)))))))
2089 (defun enlarge-window (delta &optional horizontal
)
2090 "Make selected window DELTA lines taller.
2091 Interactively, if no argument is given, make the selected window
2092 one line taller. If optional argument HORIZONTAL is non-nil,
2093 make selected window wider by DELTA columns. If DELTA is
2094 negative, shrink selected window by -DELTA lines or columns.
2099 ((window-size-fixed-p nil horizontal
)
2100 (error "Selected window has fixed size"))
2101 ((window-resizable-p nil delta horizontal
)
2102 (window-resize nil delta horizontal
))
2106 (window-max-delta nil horizontal
)
2107 (- (window-min-delta nil horizontal
)))
2110 (defun shrink-window (delta &optional horizontal
)
2111 "Make selected window DELTA lines smaller.
2112 Interactively, if no argument is given, make the selected window
2113 one line smaller. If optional argument HORIZONTAL is non-nil,
2114 make selected window narrower by DELTA columns. If DELTA is
2115 negative, enlarge selected window by -DELTA lines or columns.
2120 ((window-size-fixed-p nil horizontal
)
2121 (error "Selected window has fixed size"))
2122 ((window-resizable-p nil
(- delta
) horizontal
)
2123 (window-resize nil
(- delta
) horizontal
))
2127 (- (window-min-delta nil horizontal
))
2128 (window-max-delta nil horizontal
))
2131 (defun maximize-window (&optional window
)
2133 Make WINDOW as large as possible without deleting any windows.
2134 WINDOW can be any window and defaults to the selected window."
2136 (setq window
(window-normalize-window window
))
2137 (window-resize window
(window-max-delta window
))
2138 (window-resize window
(window-max-delta window t
) t
))
2140 (defun minimize-window (&optional window
)
2142 Make WINDOW as small as possible without deleting any windows.
2143 WINDOW can be any window and defaults to the selected window."
2145 (setq window
(window-normalize-window window
))
2146 (window-resize window
(- (window-min-delta window
)))
2147 (window-resize window
(- (window-min-delta window t
)) t
))
2149 (defsubst frame-root-window-p
(window)
2150 "Return non-nil if WINDOW is the root window of its frame."
2151 (eq window
(frame-root-window window
)))
2153 (defun window-tree-1 (window &optional next
)
2154 "Return window tree rooted at WINDOW.
2155 Optional argument NEXT non-nil means include windows right
2156 siblings in the return value.
2158 See the documentation of `window-tree' for a description of the
2165 ((window-top-child window
)
2166 (cons t
(cons (window-edges window
)
2167 (window-tree-1 (window-top-child window
) t
))))
2168 ((window-left-child window
)
2169 (cons nil
(cons (window-edges window
)
2170 (window-tree-1 (window-left-child window
) t
))))
2173 (setq window
(when next
(window-next-sibling window
))))
2176 (defun window-tree (&optional frame
)
2177 "Return the window tree of frame FRAME.
2178 FRAME must be a live frame and defaults to the selected frame.
2179 The return value is a list of the form (ROOT MINI), where ROOT
2180 represents the window tree of the frame's root window, and MINI
2181 is the frame's minibuffer window.
2183 If the root window is not split, ROOT is the root window itself.
2184 Otherwise, ROOT is a list (DIR EDGES W1 W2 ...) where DIR is nil
2185 for a horizontal split, and t for a vertical split. EDGES gives
2186 the combined size and position of the child windows in the split,
2187 and the rest of the elements are the child windows in the split.
2188 Each of the child windows may again be a window or a list
2189 representing a window split, and so on. EDGES is a list \(LEFT
2190 TOP RIGHT BOTTOM) as returned by `window-edges'."
2191 (setq frame
(window-normalize-frame frame
))
2192 (window-tree-1 (frame-root-window frame
) t
))
2194 (defun other-window (count &optional all-frames
)
2195 "Select another window in cyclic ordering of windows.
2196 COUNT specifies the number of windows to skip, starting with the
2197 selected window, before making the selection. If COUNT is
2198 positive, skip COUNT windows forwards. If COUNT is negative,
2199 skip -COUNT windows backwards. COUNT zero means do not skip any
2200 window, so select the selected window. In an interactive call,
2201 COUNT is the numeric prefix argument. Return nil.
2203 If the `other-window' parameter of WINDOW is a function and
2204 `ignore-window-parameters' is nil, call that function with the
2205 arguments COUNT and ALL-FRAMES.
2207 This function does not select a window whose `no-other-window'
2208 window parameter is non-nil.
2210 This function uses `next-window' for finding the window to
2211 select. The argument ALL-FRAMES has the same meaning as in
2212 `next-window', but the MINIBUF argument of `next-window' is
2213 always effectively nil."
2215 (let* ((window (selected-window))
2216 (function (and (not ignore-window-parameters
)
2217 (window-parameter window
'other-window
)))
2218 old-window old-count
)
2219 (if (functionp function
)
2220 (funcall function count all-frames
)
2221 ;; `next-window' and `previous-window' may return a window we are
2222 ;; not allowed to select. Hence we need an exit strategy in case
2223 ;; all windows are non-selectable.
2226 (setq window
(next-window window nil all-frames
))
2228 ((eq window old-window
)
2229 (when (= count old-count
)
2230 ;; Keep out of infinite loops. When COUNT has not changed
2231 ;; since we last looked at `window' we're probably in one.
2233 ((window-parameter window
'no-other-window
)
2235 ;; The first non-selectable window `next-window' got us:
2236 ;; Remember it and the current value of COUNT.
2237 (setq old-window window
)
2238 (setq old-count count
)))
2240 (setq count
(1- count
)))))
2242 (setq window
(previous-window window nil all-frames
))
2244 ((eq window old-window
)
2245 (when (= count old-count
)
2246 ;; Keep out of infinite loops. When COUNT has not changed
2247 ;; since we last looked at `window' we're probably in one.
2249 ((window-parameter window
'no-other-window
)
2251 ;; The first non-selectable window `previous-window' got
2252 ;; us: Remember it and the current value of COUNT.
2253 (setq old-window window
)
2254 (setq old-count count
)))
2256 (setq count
(1+ count
)))))
2258 (select-window window
)
2259 ;; Always return nil.
2262 ;; This should probably return non-nil when the selected window is part
2263 ;; of an atomic window whose root is the frame's root window.
2264 (defun one-window-p (&optional nomini all-frames
)
2265 "Return non-nil if the selected window is the only window.
2266 Optional arg NOMINI non-nil means don't count the minibuffer
2267 even if it is active. Otherwise, the minibuffer is counted
2270 Optional argument ALL-FRAMES specifies the set of frames to
2271 consider, see also `next-window'. ALL-FRAMES nil or omitted
2272 means consider windows on the selected frame only, plus the
2273 minibuffer window if specified by the NOMINI argument. If the
2274 minibuffer counts, consider all windows on all frames that share
2275 that minibuffer too. The remaining non-nil values of ALL-FRAMES
2276 with a special meaning are:
2278 - t means consider all windows on all existing frames.
2280 - `visible' means consider all windows on all visible frames on
2281 the current terminal.
2283 - 0 (the number zero) means consider all windows on all visible
2284 and iconified frames on the current terminal.
2286 - A frame means consider all windows on that frame only.
2288 Anything else means consider all windows on the selected frame
2290 (let ((base-window (selected-window)))
2291 (if (and nomini
(eq base-window
(minibuffer-window)))
2292 (setq base-window
(next-window base-window
)))
2294 (next-window base-window
(if nomini
'arg
) all-frames
))))
2296 ;;; Deleting windows.
2297 (defun window-deletable-p (&optional window
)
2298 "Return t if WINDOW can be safely deleted from its frame.
2299 Return `frame' if deleting WINDOW should also delete its
2301 (setq window
(window-normalize-window window
))
2303 (unless ignore-window-parameters
2304 ;; Handle atomicity.
2305 (when (window-parameter window
'window-atom
)
2306 (setq window
(window-atom-root window
))))
2308 (let* ((parent (window-parent window
))
2309 (frame (window-frame window
))
2310 (buffer (window-buffer window
)))
2312 ((frame-root-window-p window
)
2313 ;; WINDOW's frame can be deleted only if there are other frames
2314 ;; on the same terminal.
2315 (unless (eq frame
(next-frame frame
0))
2317 ((or ignore-window-parameters
2318 (not (eq (window-parameter window
'window-side
) 'none
))
2319 (and parent
(eq (window-parameter parent
'window-side
) 'none
)))
2320 ;; WINDOW can be deleted unless it is the main window of its
2324 (defun window--in-subtree-p (window root
)
2325 "Return t if WINDOW is either ROOT or a member of ROOT's subtree."
2326 (or (eq window root
)
2327 (let ((parent (window-parent window
)))
2330 (if (eq parent root
)
2332 (setq parent
(window-parent parent
))))))))
2334 (defun delete-window (&optional window
)
2336 WINDOW can be an arbitrary window and defaults to the selected
2339 If the variable `ignore-window-parameters' is non-nil or the
2340 `delete-window' parameter of WINDOW equals t, do not process any
2341 parameters of WINDOW. Otherwise, if the `delete-window'
2342 parameter of WINDOW specifies a function, call that function with
2343 WINDOW as its sole argument and return the value returned by that
2346 Otherwise, if WINDOW is part of an atomic window, call
2347 `delete-window' with the root of the atomic window as its
2348 argument. If WINDOW is the only window on its frame or the last
2349 non-side window, signal an error."
2351 (setq window
(window-normalize-window window
))
2352 (let* ((frame (window-frame window
))
2353 (function (window-parameter window
'delete-window
))
2354 (parent (window-parent window
))
2356 (window-check frame
)
2358 ;; Handle window parameters.
2360 ;; Ignore window parameters if `ignore-window-parameters' tells
2361 ;; us so or `delete-window' equals t.
2362 ((or ignore-window-parameters
(eq function t
)))
2363 ((functionp function
)
2364 ;; The `delete-window' parameter specifies the function to call.
2365 ;; If that function is `ignore' nothing is done. It's up to the
2366 ;; function called here to avoid infinite recursion.
2367 (throw 'done
(funcall function window
)))
2368 ((and (window-parameter window
'window-atom
)
2369 (setq atom-root
(window-atom-root window
))
2370 (not (eq atom-root window
)))
2371 (throw 'done
(delete-window atom-root
)))
2372 ((and (eq (window-parameter window
'window-side
) 'none
)
2374 (not (eq (window-parameter parent
'window-side
) 'none
))))
2375 (error "Attempt to delete last non-side window"))
2377 (error "Attempt to delete minibuffer or sole ordinary window")))
2379 (let* ((horizontal (window-left-child parent
))
2380 (size (window-total-size window horizontal
))
2382 (window--in-subtree-p (frame-selected-window frame
) window
))
2383 ;; Emacs 23 preferably gives WINDOW's space to its left
2385 (sibling (or (window-left window
) (window-right window
))))
2386 (window--resize-reset frame horizontal
)
2388 ((and (not (window-splits window
))
2389 sibling
(window-sizable-p sibling size
))
2390 ;; Resize WINDOW's sibling.
2391 (window--resize-this-window sibling size horizontal nil t
)
2392 (set-window-new-normal
2393 sibling
(+ (window-normal-size sibling horizontal
)
2394 (window-normal-size window horizontal
))))
2395 ((window-resizable-p window
(- size
) horizontal nil nil nil t
)
2396 ;; Can do without resizing fixed-size windows.
2397 (window--resize-siblings window
(- size
) horizontal
))
2399 ;; Can't do without resizing fixed-size windows.
2400 (window--resize-siblings window
(- size
) horizontal t
)))
2401 ;; Actually delete WINDOW.
2402 (delete-window-internal window
)
2403 (when (and frame-selected
2405 (frame-selected-window frame
) 'no-other-window
))
2406 ;; `delete-window-internal' has selected a window that should
2407 ;; not be selected, fix this here.
2408 (other-window -
1 frame
))
2409 (run-window-configuration-change-hook frame
)
2410 (window-check frame
)
2411 ;; Always return nil.
2414 (defun delete-other-windows (&optional window
)
2415 "Make WINDOW fill its frame.
2416 WINDOW may be any window and defaults to the selected one.
2419 If the variable `ignore-window-parameters' is non-nil or the
2420 `delete-other-windows' parameter of WINDOW equals t, do not
2421 process any parameters of WINDOW. Otherwise, if the
2422 `delete-other-windows' parameter of WINDOW specifies a function,
2423 call that function with WINDOW as its sole argument and return
2424 the value returned by that function.
2426 Otherwise, if WINDOW is part of an atomic window, call this
2427 function with the root of the atomic window as its argument. If
2428 WINDOW is a non-side window, make WINDOW the only non-side window
2429 on the frame. Side windows are not deleted. If WINDOW is a side
2430 window signal an error."
2432 (setq window
(window-normalize-window window
))
2433 (let* ((frame (window-frame window
))
2434 (function (window-parameter window
'delete-other-windows
))
2435 (window-side (window-parameter window
'window-side
))
2436 atom-root side-main
)
2437 (window-check frame
)
2440 ;; Ignore window parameters if `ignore-window-parameters' is t or
2441 ;; `delete-other-windows' is t.
2442 ((or ignore-window-parameters
(eq function t
)))
2443 ((functionp function
)
2444 ;; The `delete-other-windows' parameter specifies the function
2445 ;; to call. If the function is `ignore' no windows are deleted.
2446 ;; It's up to the function called to avoid infinite recursion.
2447 (throw 'done
(funcall function window
)))
2448 ((and (window-parameter window
'window-atom
)
2449 (setq atom-root
(window-atom-root window
))
2450 (not (eq atom-root window
)))
2451 (throw 'done
(delete-other-windows atom-root
)))
2452 ((eq window-side
'none
)
2453 ;; Set side-main to the major non-side window.
2454 (setq side-main
(window-with-parameter 'window-side
'none nil t
)))
2455 ((memq window-side window-sides
)
2456 (error "Cannot make side window the only window")))
2457 ;; If WINDOW is the main non-side window, do nothing.
2458 (unless (eq window side-main
)
2459 (delete-other-windows-internal window side-main
)
2460 (run-window-configuration-change-hook frame
)
2461 (window-check frame
))
2462 ;; Always return nil.
2465 (defun delete-other-windows-vertically (&optional window
)
2466 "Delete the windows in the same column with WINDOW, but not WINDOW itself.
2467 This may be a useful alternative binding for \\[delete-other-windows]
2468 if you often split windows horizontally."
2470 (let* ((window (or window
(selected-window)))
2471 (edges (window-edges window
))
2473 (while (not (eq (setq w
(next-window w
1)) window
))
2474 (let ((e (window-edges w
)))
2475 (when (and (= (car e
) (car edges
))
2476 (= (caddr e
) (caddr edges
)))
2478 (mapc 'delete-window delenda
)))
2480 ;;; Windows and buffers.
2482 ;; `prev-buffers' and `next-buffers' are two reserved window slots used
2483 ;; for (1) determining which buffer to show in the window when its
2484 ;; buffer shall be buried or killed and (2) which buffer to show for
2485 ;; `switch-to-prev-buffer' and `switch-to-next-buffer'.
2487 ;; `prev-buffers' consists of <buffer, window-start, window-point>
2488 ;; triples. The entries on this list are ordered by the time their
2489 ;; buffer has been removed from the window, the most recently removed
2490 ;; buffer's entry being first. The window-start and window-point
2491 ;; components are `window-start' and `window-point' at the time the
2492 ;; buffer was removed from the window which implies that the entry must
2493 ;; be added when `set-window-buffer' removes the buffer from the window.
2495 ;; `next-buffers' is the list of buffers that have been replaced
2496 ;; recently by `switch-to-prev-buffer'. These buffers are the least
2497 ;; preferred candidates of `switch-to-prev-buffer' and the preferred
2498 ;; candidates of `switch-to-next-buffer' to switch to. This list is
2499 ;; reset to nil by any action changing the window's buffer with the
2500 ;; exception of `switch-to-prev-buffer' and `switch-to-next-buffer'.
2501 ;; `switch-to-prev-buffer' pushes the buffer it just replaced on it,
2502 ;; `switch-to-next-buffer' pops the last pushed buffer from it.
2504 ;; Both `prev-buffers' and `next-buffers' may reference killed buffers
2505 ;; if such a buffer was killed while the window was hidden within a
2506 ;; window configuration. Such killed buffers get removed whenever
2507 ;; `switch-to-prev-buffer' or `switch-to-next-buffer' encounter them.
2509 ;; The following function is called by `set-window-buffer' _before_ it
2510 ;; replaces the buffer of the argument window with the new buffer.
2511 (defun record-window-buffer (&optional window
)
2512 "Record WINDOW's buffer.
2513 WINDOW must be a live window and defaults to the selected one."
2514 (let* ((window (window-normalize-window window t
))
2515 (buffer (window-buffer window
))
2516 (entry (assq buffer
(window-prev-buffers window
))))
2517 ;; Reset WINDOW's next buffers. If needed, they are resurrected by
2518 ;; `switch-to-prev-buffer' and `switch-to-next-buffer'.
2519 (set-window-next-buffers window nil
)
2522 ;; Remove all entries for BUFFER from WINDOW's previous buffers.
2523 (set-window-prev-buffers
2524 window
(assq-delete-all buffer
(window-prev-buffers window
))))
2526 ;; Don't record insignificant buffers.
2527 (unless (eq (aref (buffer-name buffer
) 0) ?\s
)
2528 ;; Add an entry for buffer to WINDOW's previous buffers.
2529 (with-current-buffer buffer
2530 (let ((start (window-start window
))
2531 (point (window-point-1 window
)))
2535 ;; We have an entry, update marker positions.
2536 (list (set-marker (nth 1 entry
) start
)
2537 (set-marker (nth 2 entry
) point
))
2538 ;; Make new markers.
2539 (list (copy-marker start
)
2540 (copy-marker point
)))))
2542 (set-window-prev-buffers
2543 window
(cons entry
(window-prev-buffers window
))))))))
2545 (defun unrecord-window-buffer (&optional window buffer
)
2546 "Unrecord BUFFER in WINDOW.
2547 WINDOW must be a live window and defaults to the selected one.
2548 BUFFER must be a live buffer and defaults to the buffer of
2550 (let* ((window (window-normalize-window window t
))
2551 (buffer (or buffer
(window-buffer window
))))
2552 (set-window-prev-buffers
2553 window
(assq-delete-all buffer
(window-prev-buffers window
)))
2554 (set-window-next-buffers
2555 window
(delq buffer
(window-next-buffers window
)))))
2557 (defun set-window-buffer-start-and-point (window buffer
&optional start point
)
2558 "Set WINDOW's buffer to BUFFER.
2559 Optional argument START non-nil means set WINDOW's start position
2560 to START. Optional argument POINT non-nil means set WINDOW's
2561 point to POINT. If WINDOW is selected this also sets BUFFER's
2562 `point' to POINT. If WINDOW is selected and the buffer it showed
2563 before was current this also makes BUFFER the current buffer."
2564 (let ((selected (eq window
(selected-window)))
2565 (current (eq (window-buffer window
) (current-buffer))))
2566 (set-window-buffer window buffer
)
2567 (when (and selected current
)
2568 (set-buffer buffer
))
2570 ;; Don't force window-start here (even if POINT is nil).
2571 (set-window-start window start t
))
2573 (set-window-point-1 window point
))))
2575 (defun switch-to-prev-buffer (&optional window bury-or-kill
)
2576 "In WINDOW switch to previous buffer.
2577 WINDOW must be a live window and defaults to the selected one.
2579 Optional argument BURY-OR-KILL non-nil means the buffer currently
2580 shown in WINDOW is about to be buried or killed and consequently
2581 shall not be switched to in future invocations of this command."
2583 (let* ((window (window-normalize-window window t
))
2584 (old-buffer (window-buffer window
))
2585 ;; Save this since it's destroyed by `set-window-buffer'.
2586 (next-buffers (window-next-buffers window
))
2587 entry new-buffer killed-buffers visible
)
2588 (when (window-dedicated-p window
)
2589 (error "Window %s is dedicated to buffer %s" window old-buffer
))
2592 ;; Scan WINDOW's previous buffers first, skipping entries of next
2594 (dolist (entry (window-prev-buffers window
))
2595 (when (and (setq new-buffer
(car entry
))
2596 (or (buffer-live-p new-buffer
)
2597 (not (setq killed-buffers
2598 (cons new-buffer killed-buffers
))))
2599 (not (eq new-buffer old-buffer
))
2601 (not (memq new-buffer next-buffers
))))
2602 (set-window-buffer-start-and-point
2603 window new-buffer
(nth 1 entry
) (nth 2 entry
))
2605 ;; Scan reverted buffer list of WINDOW's frame next, skipping
2606 ;; entries of next buffers. Note that when we bury or kill a
2607 ;; buffer we don't reverse the global buffer list to avoid showing
2608 ;; a buried buffer instead. Otherwise, we must reverse the global
2609 ;; buffer list in order to make sure that switching to the
2610 ;; previous/next buffer traverse it in opposite directions.
2611 (dolist (buffer (if bury-or-kill
2612 (buffer-list (window-frame window
))
2613 (nreverse (buffer-list (window-frame window
)))))
2614 (when (and (buffer-live-p buffer
)
2615 (not (eq buffer old-buffer
))
2616 (not (eq (aref (buffer-name buffer
) 0) ?\s
))
2617 (or bury-or-kill
(not (memq buffer next-buffers
))))
2618 (if (get-buffer-window buffer
)
2619 ;; Try to avoid showing a buffer visible in some other window.
2620 (setq visible buffer
)
2621 (setq new-buffer buffer
)
2622 (set-window-buffer-start-and-point window new-buffer
)
2624 (unless bury-or-kill
2625 ;; Scan reverted next buffers last (must not use nreverse
2627 (dolist (buffer (reverse next-buffers
))
2628 ;; Actually, buffer _must_ be live here since otherwise it
2629 ;; would have been caught in the scan of previous buffers.
2630 (when (and (or (buffer-live-p buffer
)
2631 (not (setq killed-buffers
2632 (cons buffer killed-buffers
))))
2633 (not (eq buffer old-buffer
))
2634 (setq entry
(assq buffer
(window-prev-buffers window
))))
2635 (setq new-buffer buffer
)
2636 (set-window-buffer-start-and-point
2637 window new-buffer
(nth 1 entry
) (nth 2 entry
))
2640 ;; Show a buffer visible in another window.
2642 (setq new-buffer visible
)
2643 (set-window-buffer-start-and-point window new-buffer
)))
2646 ;; Remove `old-buffer' from WINDOW's previous and (restored list
2647 ;; of) next buffers.
2649 (set-window-prev-buffers
2650 window
(assq-delete-all old-buffer
(window-prev-buffers window
)))
2651 (set-window-next-buffers window
(delq old-buffer next-buffers
)))
2652 ;; Move `old-buffer' to head of WINDOW's restored list of next
2654 (set-window-next-buffers
2655 window
(cons old-buffer
(delq old-buffer next-buffers
))))
2657 ;; Remove killed buffers from WINDOW's previous and next buffers.
2658 (when killed-buffers
2659 (dolist (buffer killed-buffers
)
2660 (set-window-prev-buffers
2661 window
(assq-delete-all buffer
(window-prev-buffers window
)))
2662 (set-window-next-buffers
2663 window
(delq buffer
(window-next-buffers window
)))))
2665 ;; Return new-buffer.
2668 (defun switch-to-next-buffer (&optional window
)
2669 "In WINDOW switch to next buffer.
2670 WINDOW must be a live window and defaults to the selected one."
2672 (let* ((window (window-normalize-window window t
))
2673 (old-buffer (window-buffer window
))
2674 (next-buffers (window-next-buffers window
))
2675 new-buffer entry killed-buffers visible
)
2676 (when (window-dedicated-p window
)
2677 (error "Window %s is dedicated to buffer %s" window old-buffer
))
2680 ;; Scan WINDOW's next buffers first.
2681 (dolist (buffer next-buffers
)
2682 (when (and (or (buffer-live-p buffer
)
2683 (not (setq killed-buffers
2684 (cons buffer killed-buffers
))))
2685 (not (eq buffer old-buffer
))
2686 (setq entry
(assq buffer
(window-prev-buffers window
))))
2687 (setq new-buffer buffer
)
2688 (set-window-buffer-start-and-point
2689 window new-buffer
(nth 1 entry
) (nth 2 entry
))
2691 ;; Scan the buffer list of WINDOW's frame next, skipping previous
2693 (dolist (buffer (buffer-list (window-frame window
)))
2694 (when (and (buffer-live-p buffer
) (not (eq buffer old-buffer
))
2695 (not (eq (aref (buffer-name buffer
) 0) ?\s
))
2696 (not (assq buffer
(window-prev-buffers window
))))
2697 (if (get-buffer-window buffer
)
2698 ;; Try to avoid showing a buffer visible in some other window.
2699 (setq visible buffer
)
2700 (setq new-buffer buffer
)
2701 (set-window-buffer-start-and-point window new-buffer
)
2703 ;; Scan WINDOW's reverted previous buffers last (must not use
2705 (dolist (entry (reverse (window-prev-buffers window
)))
2706 (when (and (setq new-buffer
(car entry
))
2707 (or (buffer-live-p new-buffer
)
2708 (not (setq killed-buffers
2709 (cons new-buffer killed-buffers
))))
2710 (not (eq new-buffer old-buffer
)))
2711 (set-window-buffer-start-and-point
2712 window new-buffer
(nth 1 entry
) (nth 2 entry
))
2715 ;; Show a buffer visible in another window.
2717 (setq new-buffer visible
)
2718 (set-window-buffer-start-and-point window new-buffer
)))
2720 ;; Remove `new-buffer' from and restore WINDOW's next buffers.
2721 (set-window-next-buffers window
(delq new-buffer next-buffers
))
2723 ;; Remove killed buffers from WINDOW's previous and next buffers.
2724 (when killed-buffers
2725 (dolist (buffer killed-buffers
)
2726 (set-window-prev-buffers
2727 window
(assq-delete-all buffer
(window-prev-buffers window
)))
2728 (set-window-next-buffers
2729 window
(delq buffer
(window-next-buffers window
)))))
2731 ;; Return new-buffer.
2734 (defun get-next-valid-buffer (list &optional buffer visible-ok frame
)
2735 "Search LIST for a valid buffer to display in FRAME.
2736 Return nil when all buffers in LIST are undesirable for display,
2737 otherwise return the first suitable buffer in LIST.
2739 Buffers not visible in windows are preferred to visible buffers,
2740 unless VISIBLE-OK is non-nil.
2741 If the optional argument FRAME is nil, it defaults to the selected frame.
2742 If BUFFER is non-nil, ignore occurrences of that buffer in LIST."
2743 ;; This logic is more or less copied from other-buffer.
2744 (setq frame
(or frame
(selected-frame)))
2745 (let ((pred (frame-parameter frame
'buffer-predicate
))
2747 (while (and (not found
) list
)
2748 (setq buf
(car list
))
2749 (if (and (not (eq buffer buf
))
2751 (or (null pred
) (funcall pred buf
))
2752 (not (eq (aref (buffer-name buf
) 0) ?\s
))
2753 (or visible-ok
(null (get-buffer-window buf
'visible
))))
2755 (setq list
(cdr list
))))
2758 (defun last-buffer (&optional buffer visible-ok frame
)
2759 "Return the last buffer in FRAME's buffer list.
2760 If BUFFER is the last buffer, return the preceding buffer
2761 instead. Buffers not visible in windows are preferred to visible
2762 buffers, unless optional argument VISIBLE-OK is non-nil.
2763 Optional third argument FRAME nil or omitted means use the
2764 selected frame's buffer list. If no such buffer exists, return
2765 the buffer `*scratch*', creating it if necessary."
2766 (setq frame
(or frame
(selected-frame)))
2767 (or (get-next-valid-buffer (nreverse (buffer-list frame
))
2768 buffer visible-ok frame
)
2769 (get-buffer "*scratch*")
2770 (let ((scratch (get-buffer-create "*scratch*")))
2771 (set-buffer-major-mode scratch
)
2774 (defcustom frame-auto-hide-function
#'iconify-frame
2775 "Function called to automatically hide frames.
2776 The function is called with one argument - a frame.
2778 Functions affected by this option are those that bury a buffer
2779 shown in a separate frame like `quit-window' and `bury-buffer'."
2780 :type
'(choice (const :tag
"Iconify" iconify-frame
)
2781 (const :tag
"Delete" delete-frame
)
2782 (const :tag
"Do nothing" ignore
)
2788 (defun window--delete (&optional window dedicated-only kill
)
2789 "Delete WINDOW if possible.
2790 WINDOW must be a live window and defaults to the selected one.
2791 Optional argument DEDICATED-ONLY non-nil means to delete WINDOW
2792 only if it's dedicated to its buffer. Optional argument KILL
2793 means the buffer shown in window will be killed. Return non-nil
2794 if WINDOW gets deleted or its frame is auto-hidden."
2795 (setq window
(window-normalize-window window t
))
2796 (unless (and dedicated-only
(not (window-dedicated-p window
)))
2797 (let* ((buffer (window-buffer window
))
2798 (deletable (window-deletable-p window
)))
2800 ((eq deletable
'frame
)
2801 (let ((frame (window-frame window
)))
2804 (delete-frame frame
))
2805 ((functionp frame-auto-hide-function
)
2806 (funcall frame-auto-hide-function frame
))))
2809 (delete-window window
)
2812 (defun bury-buffer (&optional buffer-or-name
)
2813 "Put BUFFER-OR-NAME at the end of the list of all buffers.
2814 There it is the least likely candidate for `other-buffer' to
2815 return; thus, the least likely buffer for \\[switch-to-buffer] to
2818 You can specify a buffer name as BUFFER-OR-NAME, or an actual
2819 buffer object. If BUFFER-OR-NAME is nil or omitted, bury the
2820 current buffer. Also, if BUFFER-OR-NAME is nil or omitted,
2821 remove the current buffer from the selected window if it is
2824 (let* ((buffer (window-normalize-buffer buffer-or-name
)))
2825 ;; If `buffer-or-name' is not on the selected frame we unrecord it
2826 ;; although it's not "here" (call it a feature).
2827 (bury-buffer-internal buffer
)
2828 ;; Handle case where `buffer-or-name' is nil and the current buffer
2829 ;; is shown in the selected window.
2831 ((or buffer-or-name
(not (eq buffer
(window-buffer)))))
2832 ((window--delete nil t
))
2834 ;; Switch to another buffer in window.
2835 (set-window-dedicated-p nil nil
)
2836 (switch-to-prev-buffer nil
'bury
)))
2838 ;; Always return nil.
2841 (defun unbury-buffer ()
2842 "Switch to the last buffer in the buffer list."
2844 (switch-to-buffer (last-buffer)))
2846 (defun next-buffer ()
2847 "In selected window switch to next buffer."
2849 (if (window-minibuffer-p)
2850 (error "Cannot switch buffers in minibuffer window"))
2851 (switch-to-next-buffer))
2853 (defun previous-buffer ()
2854 "In selected window switch to previous buffer."
2856 (if (window-minibuffer-p)
2857 (error "Cannot switch buffers in minibuffer window"))
2858 (switch-to-prev-buffer))
2860 (defun delete-windows-on (&optional buffer-or-name frame
)
2861 "Delete all windows showing BUFFER-OR-NAME.
2862 BUFFER-OR-NAME may be a buffer or the name of an existing buffer
2863 and defaults to the current buffer.
2865 The following non-nil values of the optional argument FRAME
2866 have special meanings:
2868 - t means consider all windows on the selected frame only.
2870 - `visible' means consider all windows on all visible frames on
2871 the current terminal.
2873 - 0 (the number zero) means consider all windows on all visible
2874 and iconified frames on the current terminal.
2876 - A frame means consider all windows on that frame only.
2878 Any other value of FRAME means consider all windows on all
2881 When a window showing BUFFER-OR-NAME is dedicated and the only
2882 window of its frame, that frame is deleted when there are other
2884 (interactive "BDelete windows on (buffer):\nP")
2885 (let ((buffer (window-normalize-buffer buffer-or-name
))
2886 ;; Handle the "inverted" meaning of the FRAME argument wrt other
2887 ;; `window-list-1' based function.
2888 (all-frames (cond ((not frame
) t
) ((eq frame t
) nil
) (t frame
))))
2889 (dolist (window (window-list-1 nil nil all-frames
))
2890 (if (eq (window-buffer window
) buffer
)
2891 (let ((deletable (window-deletable-p window
)))
2893 ((and (eq deletable
'frame
) (window-dedicated-p window
))
2894 ;; Delete frame if and only if window is dedicated.
2895 (delete-frame (window-frame window
)))
2898 (delete-window window
))
2900 ;; In window switch to previous buffer.
2901 (set-window-dedicated-p window nil
)
2902 (switch-to-prev-buffer window
'bury
))))
2903 ;; If a window doesn't show BUFFER, unrecord BUFFER in it.
2904 (unrecord-window-buffer window buffer
)))))
2906 (defun replace-buffer-in-windows (&optional buffer-or-name
)
2907 "Replace BUFFER-OR-NAME with some other buffer in all windows showing it.
2908 BUFFER-OR-NAME may be a buffer or the name of an existing buffer
2909 and defaults to the current buffer.
2911 When a window showing BUFFER-OR-NAME is dedicated, that window is
2912 deleted. If that window is the only window on its frame, the
2913 frame is deleted too when there are other frames left. If there
2914 are no other frames left, some other buffer is displayed in that
2917 This function removes the buffer denoted by BUFFER-OR-NAME from
2918 all window-local buffer lists."
2919 (let ((buffer (window-normalize-buffer buffer-or-name
)))
2920 (dolist (window (window-list-1 nil nil t
))
2921 (if (eq (window-buffer window
) buffer
)
2922 (unless (window--delete window t t
)
2923 ;; Switch to another buffer in window.
2924 (set-window-dedicated-p window nil
)
2925 (switch-to-prev-buffer window
'kill
))
2926 ;; Unrecord BUFFER in WINDOW.
2927 (unrecord-window-buffer window buffer
)))))
2929 (defun quit-window (&optional kill window
)
2930 "Quit WINDOW and bury its buffer.
2931 WINDOW must be a live window and defaults to the selected one.
2932 With prefix argument KILL non-nil, kill the buffer instead of
2935 According to information stored in WINDOW's `quit-restore' window
2936 parameter either \(1) delete WINDOW and its frame, \(2) delete
2937 WINDOW, \(3) restore the buffer previously displayed in WINDOW,
2938 or \(4) make WINDOW display some other buffer than the present
2939 one. If non-nil, reset `quit-restore' parameter to nil."
2941 (setq window
(window-normalize-window window t
))
2942 (let* ((buffer (window-buffer window
))
2943 (quit-restore (window-parameter window
'quit-restore
))
2945 (let* ((prev-buffers (window-prev-buffers window
))
2946 (prev-buffer (caar prev-buffers
)))
2947 (and (or (not (eq prev-buffer buffer
))
2948 (and (cdr prev-buffers
)
2949 (not (eq (setq prev-buffer
(cadr prev-buffers
))
2954 ((and (not prev-buffer
)
2955 (memq (nth 1 quit-restore
) '(window frame
))
2956 (eq (nth 3 quit-restore
) buffer
)
2957 ;; Delete WINDOW if possible.
2958 (window--delete window nil kill
))
2959 ;; If the previously selected window is still alive, select it.
2960 (when (window-live-p (nth 2 quit-restore
))
2961 (select-window (nth 2 quit-restore
))))
2962 ((and (listp (setq quad
(nth 1 quit-restore
)))
2963 (buffer-live-p (car quad
))
2964 (eq (nth 3 quit-restore
) buffer
))
2965 ;; Show another buffer stored in quit-restore parameter.
2966 (setq resize
(with-current-buffer buffer
2967 (and temp-buffer-resize-mode
2968 (/= (nth 3 quad
) (window-total-size window
)))))
2969 (set-window-dedicated-p window nil
)
2971 ;; Try to resize WINDOW to its old height but don't signal an
2974 (window-resize window
(- (nth 3 quad
) (window-total-size window
)))
2976 ;; Restore WINDOW's previous buffer, start and point position.
2977 (set-window-buffer-start-and-point
2978 window
(nth 0 quad
) (nth 1 quad
) (nth 2 quad
))
2979 ;; Unrecord WINDOW's buffer here (Bug#9937) to make sure it's not
2980 ;; re-recorded by `set-window-buffer'.
2981 (unrecord-window-buffer window buffer
)
2982 ;; Reset the quit-restore parameter.
2983 (set-window-parameter window
'quit-restore nil
)
2984 ;; Select old window.
2985 (when (window-live-p (nth 2 quit-restore
))
2986 (select-window (nth 2 quit-restore
))))
2988 ;; Show some other buffer in WINDOW and reset the quit-restore
2990 (set-window-parameter window
'quit-restore nil
)
2991 ;; Make sure that WINDOW is no more dedicated.
2992 (set-window-dedicated-p window nil
)
2993 (switch-to-prev-buffer window
'bury-or-kill
)))
2995 ;; Kill WINDOW's old-buffer if requested
2997 (kill-buffer buffer
)
2998 (bury-buffer-internal buffer
))))
3000 (defun quit-windows-on (&optional buffer-or-name kill frame
)
3001 "Quit all windows showing BUFFER-OR-NAME.
3002 BUFFER-OR-NAME may be a buffer or the name of an existing buffer
3003 and defaults to the current buffer. Optional argument KILL
3004 non-nil means to kill BUFFER-OR-NAME. KILL nil means to bury
3005 BUFFER-OR-NAME. Optional argument FRAME is handled as by
3006 `delete-windows-on'.
3008 This function calls `quit-window' on all candidate windows
3009 showing BUFFER-OR-NAME."
3010 (interactive "BQuit windows on (buffer):\nP")
3011 (let ((buffer (window-normalize-buffer buffer-or-name
))
3012 ;; Handle the "inverted" meaning of the FRAME argument wrt other
3013 ;; `window-list-1' based function.
3014 (all-frames (cond ((not frame
) t
) ((eq frame t
) nil
) (t frame
))))
3015 (dolist (window (window-list-1 nil nil all-frames
))
3016 (if (eq (window-buffer window
) buffer
)
3017 (quit-window kill window
)
3018 ;; If a window doesn't show BUFFER, unrecord BUFFER in it.
3019 (unrecord-window-buffer window buffer
)))))
3021 ;;; Splitting windows.
3022 (defsubst window-split-min-size
(&optional horizontal
)
3023 "Return minimum height of any window when splitting windows.
3024 Optional argument HORIZONTAL non-nil means return minimum width."
3026 (max window-min-width window-safe-min-width
)
3027 (max window-min-height window-safe-min-height
)))
3029 (defun split-window (&optional window size side
)
3030 "Make a new window adjacent to WINDOW.
3031 WINDOW can be any window and defaults to the selected one.
3032 Return the new window which is always a live window.
3034 Optional argument SIZE a positive number means make WINDOW SIZE
3035 lines or columns tall. If SIZE is negative, make the new window
3036 -SIZE lines or columns tall. If and only if SIZE is non-nil, its
3037 absolute value can be less than `window-min-height' or
3038 `window-min-width'; so this command can make a new window as
3039 small as one line or two columns. SIZE defaults to half of
3040 WINDOW's size. Interactively, SIZE is the prefix argument.
3042 Optional third argument SIDE nil (or `below') specifies that the
3043 new window shall be located below WINDOW. SIDE `above' means the
3044 new window shall be located above WINDOW. In both cases SIZE
3045 specifies the new number of lines for WINDOW \(or the new window
3046 if SIZE is negative) including space reserved for the mode and/or
3049 SIDE t (or `right') specifies that the new window shall be
3050 located on the right side of WINDOW. SIDE `left' means the new
3051 window shall be located on the left of WINDOW. In both cases
3052 SIZE specifies the new number of columns for WINDOW \(or the new
3053 window provided SIZE is negative) including space reserved for
3054 fringes and the scrollbar or a divider column. Any other non-nil
3055 value for SIDE is currently handled like t (or `right').
3057 If the variable `ignore-window-parameters' is non-nil or the
3058 `split-window' parameter of WINDOW equals t, do not process any
3059 parameters of WINDOW. Otherwise, if the `split-window' parameter
3060 of WINDOW specifies a function, call that function with all three
3061 arguments and return the value returned by that function.
3063 Otherwise, if WINDOW is part of an atomic window, \"split\" the
3064 root of that atomic window. The new window does not become a
3065 member of that atomic window.
3067 If WINDOW is live, properties of the new window like margins and
3068 scrollbars are inherited from WINDOW. If WINDOW is an internal
3069 window, these properties as well as the buffer displayed in the
3070 new window are inherited from the window selected on WINDOW's
3071 frame. The selected window is not changed by this function."
3073 (setq window
(window-normalize-window window
))
3076 ((memq side
'(below above right left
)) side
)
3078 (horizontal (not (memq side
'(nil below above
))))
3079 (frame (window-frame window
))
3080 (parent (window-parent window
))
3081 (function (window-parameter window
'split-window
))
3082 (window-side (window-parameter window
'window-side
))
3083 ;; Rebind `window-nest' since in some cases we may have to
3084 ;; override its value.
3085 (window-nest window-nest
)
3088 (window-check frame
)
3091 ;; Ignore window parameters if either `ignore-window-parameters'
3092 ;; is t or the `split-window' parameter equals t.
3093 ((or ignore-window-parameters
(eq function t
)))
3094 ((functionp function
)
3095 ;; The `split-window' parameter specifies the function to call.
3096 ;; If that function is `ignore', do nothing.
3097 (throw 'done
(funcall function window size side
)))
3098 ;; If WINDOW is part of an atomic window, split the root window
3099 ;; of that atomic window instead.
3100 ((and (window-parameter window
'window-atom
)
3101 (setq atom-root
(window-atom-root window
))
3102 (not (eq atom-root window
)))
3103 (throw 'done
(split-window atom-root size side
))))
3105 (when (and window-side
3107 (not (window-parameter parent
'window-side
))))
3108 ;; WINDOW is a side root window. To make sure that a new parent
3109 ;; window gets created set `window-nest' to t.
3110 (setq window-nest t
))
3112 (when (and window-splits size
(> size
0))
3113 ;; If `window-splits' is non-nil and SIZE is a non-negative
3114 ;; integer, we cannot reasonably resize other windows. Rather
3115 ;; bind `window-nest' to t to make sure that subsequent window
3116 ;; deletions are handled correctly.
3117 (setq window-nest t
))
3120 ;; `parent-size' is the size of WINDOW's parent, provided
3122 (when parent
(window-total-size parent horizontal
)))
3123 ;; `resize' non-nil means we are supposed to resize other
3124 ;; windows in WINDOW's combination.
3126 (and window-splits
(not window-nest
)
3127 ;; Resize makes sense in iso-combinations only.
3128 (window-combined-p window horizontal
)))
3129 ;; `old-size' is the current size of WINDOW.
3130 (old-size (window-total-size window horizontal
))
3131 ;; `new-size' is the specified or calculated size of the
3136 (max (window-split-min-size horizontal
)
3138 ;; When resizing try to give the new window the
3139 ;; average size of a window in its combination.
3141 (window-min-size parent horizontal
))
3143 (1+ (window-combinations
3144 parent horizontal
))))
3145 ;; Else try to give the new window half the size
3146 ;; of WINDOW (plus an eventual odd line).
3147 (+ (/ old-size
2) (% old-size
2)))))
3149 ;; SIZE non-negative specifies the new size of WINDOW.
3151 ;; Note: Specifying a non-negative SIZE is practically
3152 ;; always done as workaround for making the new window
3153 ;; appear above or on the left of the new window (the
3154 ;; ispell window is a typical example of that). In all
3155 ;; these cases the SIDE argument should be set to 'above
3156 ;; or 'left in order to support the 'resize option.
3157 ;; Here we have to nest the windows instead, see above.
3160 ;; SIZE negative specifies the size of the new window.
3162 new-parent new-normal
)
3169 ;; SIZE unspecified, resizing.
3170 (when (and (not (window-sizable-p parent
(- new-size
) horizontal
))
3171 ;; Try again with minimum split size.
3173 (max new-size
(window-split-min-size horizontal
)))
3174 (not (window-sizable-p parent
(- new-size
) horizontal
)))
3175 (error "Window %s too small for splitting" parent
)))
3176 ((> (+ new-size
(window-min-size window horizontal
)) old-size
)
3177 ;; SIZE unspecified, no resizing.
3178 (error "Window %s too small for splitting" window
))))
3180 (or (>= size old-size
)
3181 (< new-size
(if horizontal
3182 window-safe-min-width
3183 window-safe-min-width
))))
3184 ;; SIZE specified as new size of old window. If the new size
3185 ;; is larger than the old size or the size of the new window
3186 ;; would be less than the safe minimum, signal an error.
3187 (error "Window %s too small for splitting" window
))
3189 ;; SIZE specified, resizing.
3190 (unless (window-sizable-p parent
(- new-size
) horizontal
)
3191 ;; If we cannot resize the parent give up.
3192 (error "Window %s too small for splitting" parent
)))
3194 (if horizontal window-safe-min-width window-safe-min-height
))
3195 (< (- old-size new-size
)
3196 (if horizontal window-safe-min-width window-safe-min-height
)))
3197 ;; SIZE specification violates minimum size restrictions.
3198 (error "Window %s too small for splitting" window
)))
3200 (window--resize-reset frame horizontal
)
3203 ;; Make new-parent non-nil if we need a new parent window;
3204 ;; either because we want to nest or because WINDOW is not
3206 (or window-nest
(not (window-combined-p window horizontal
))))
3208 ;; Make new-normal the normal size of the new window.
3210 (size (/ (float new-size
) (if new-parent old-size parent-size
)))
3212 (resize (/ 1.0 (1+ (window-combinations parent horizontal
))))
3213 (t (/ (window-normal-size window horizontal
) 2.0))))
3216 ;; Try to get space from OLD's siblings. We could go "up" and
3217 ;; try getting additional space from surrounding windows but
3218 ;; we won't be able to return space to those windows when we
3219 ;; delete the one we create here. Hence we do not go up.
3221 (window--resize-child-windows parent
(- new-size
) horizontal
)
3222 (let* ((normal (- 1.0 new-normal
))
3223 (sub (window-child parent
)))
3225 (set-window-new-normal
3226 sub
(* (window-normal-size sub horizontal
) normal
))
3227 (setq sub
(window-right sub
)))))
3228 ;; Get entire space from WINDOW.
3229 (set-window-new-total window
(- old-size new-size
))
3230 (window--resize-this-window window
(- new-size
) horizontal
)
3231 (set-window-new-normal
3232 window
(- (if new-parent
1.0 (window-normal-size window horizontal
))
3235 (let* ((new (split-window-internal window new-size side new-normal
)))
3236 ;; Inherit window-side parameters, if any.
3237 (when (and window-side new-parent
)
3238 (set-window-parameter (window-parent new
) 'window-side window-side
)
3239 (set-window-parameter new
'window-side window-side
))
3241 (run-window-configuration-change-hook frame
)
3242 (window-check frame
)
3243 ;; Always return the new window.
3246 ;; I think this should be the default; I think people will prefer it--rms.
3247 (defcustom split-window-keep-point t
3248 "If non-nil, \\[split-window-below] preserves point in the new window.
3249 If nil, adjust point in the two windows to minimize redisplay.
3250 This option applies only to `split-window-below' and functions
3251 that call it. The low-level `split-window' function always keeps
3252 the original point in both windows."
3256 (defun split-window-below (&optional size
)
3257 "Split the selected window into two windows, one above the other.
3258 The selected window is above. The newly split-off window is
3259 below, and displays the same buffer. Return the new window.
3261 If optional argument SIZE is omitted or nil, both windows get the
3262 same height, or close to it. If SIZE is positive, the upper
3263 \(selected) window gets SIZE lines. If SIZE is negative, the
3264 lower (new) window gets -SIZE lines.
3266 If the variable `split-window-keep-point' is non-nil, both
3267 windows get the same value of point as the selected window.
3268 Otherwise, the window starts are chosen so as to minimize the
3269 amount of redisplay; this is convenient on slow terminals."
3271 (let ((old-window (selected-window))
3273 (size (and size
(prefix-numeric-value size
)))
3274 moved-by-window-height moved new-window bottom
)
3275 (when (and size
(< size
0) (< (- size
) window-min-height
))
3276 ;; `split-window' would not signal an error here.
3277 (error "Size of new window too small"))
3278 (setq new-window
(split-window nil size
))
3279 (unless split-window-keep-point
3280 (with-current-buffer (window-buffer)
3281 (goto-char (window-start))
3282 (setq moved
(vertical-motion (window-height)))
3283 (set-window-start new-window
(point))
3284 (when (> (point) (window-point new-window
))
3285 (set-window-point new-window
(point)))
3286 (when (= moved
(window-height))
3287 (setq moved-by-window-height t
)
3288 (vertical-motion -
1))
3289 (setq bottom
(point)))
3290 (and moved-by-window-height
3292 (set-window-point old-window
(1- bottom
)))
3293 (and moved-by-window-height
3294 (<= (window-start new-window
) old-point
)
3295 (set-window-point new-window old-point
)
3296 (select-window new-window
)))
3297 ;; Always copy quit-restore parameter in interactive use.
3298 (let ((quit-restore (window-parameter old-window
'quit-restore
)))
3300 (set-window-parameter new-window
'quit-restore quit-restore
)))
3303 (defalias 'split-window-vertically
'split-window-below
)
3305 (defun split-window-right (&optional size
)
3306 "Split the selected window into two side-by-side windows.
3307 The selected window is on the left. The newly split-off window
3308 is on the right, and displays the same buffer. Return the new
3311 If optional argument SIZE is omitted or nil, both windows get the
3312 same width, or close to it. If SIZE is positive, the left-hand
3313 \(selected) window gets SIZE columns. If SIZE is negative, the
3314 right-hand (new) window gets -SIZE columns. Here, SIZE includes
3315 the width of the window's scroll bar; if there are no scroll
3316 bars, it includes the width of the divider column to the window's
3319 (let ((old-window (selected-window))
3320 (size (and size
(prefix-numeric-value size
)))
3322 (when (and size
(< size
0) (< (- size
) window-min-width
))
3323 ;; `split-window' would not signal an error here.
3324 (error "Size of new window too small"))
3325 (setq new-window
(split-window nil size t
))
3326 ;; Always copy quit-restore parameter in interactive use.
3327 (let ((quit-restore (window-parameter old-window
'quit-restore
)))
3329 (set-window-parameter new-window
'quit-restore quit-restore
)))
3332 (defalias 'split-window-horizontally
'split-window-right
)
3334 ;;; Balancing windows.
3336 ;; The following routine uses the recycled code from an old version of
3337 ;; `window--resize-child-windows'. It's not very pretty, but coding it the way the
3338 ;; new `window--resize-child-windows' code does would hardly make it any shorter or
3339 ;; more readable (FWIW we'd need three loops - one to calculate the
3340 ;; minimum sizes per window, one to enlarge or shrink windows until the
3341 ;; new parent-size matches, and one where we shrink the largest/enlarge
3342 ;; the smallest window).
3343 (defun balance-windows-2 (window horizontal
)
3344 "Subroutine of `balance-windows-1'.
3345 WINDOW must be a vertical combination (horizontal if HORIZONTAL
3347 (let* ((first (window-child window
))
3349 (number-of-children 0)
3350 (parent-size (window-new-total window
))
3351 (total-sum parent-size
)
3352 found failed size sub-total sub-delta sub-amount rest
)
3354 (setq number-of-children
(1+ number-of-children
))
3355 (when (window-size-fixed-p sub horizontal
)
3357 (- total-sum
(window-total-size sub horizontal
)))
3358 (set-window-new-normal sub
'ignore
))
3359 (setq sub
(window-right sub
)))
3362 (while (and failed
(> number-of-children
0))
3363 (setq size
(/ total-sum number-of-children
))
3366 (while (and sub
(not failed
))
3367 ;; Ignore child windows that should be ignored or are stuck.
3368 (unless (window--resize-child-windows-skip-p sub
)
3370 (setq sub-total
(window-total-size sub horizontal
))
3371 (setq sub-delta
(- size sub-total
))
3373 (window-sizable sub sub-delta horizontal
))
3374 ;; Register the new total size for this child window.
3375 (set-window-new-total sub
(+ sub-total sub-amount
))
3376 (unless (= sub-amount sub-delta
)
3377 (setq total-sum
(- total-sum sub-total sub-amount
))
3378 (setq number-of-children
(1- number-of-children
))
3379 ;; We failed and need a new round.
3381 (set-window-new-normal sub
'skip
)))
3382 (setq sub
(window-right sub
))))
3384 (setq rest
(% total-sum number-of-children
))
3385 ;; Fix rounding by trying to enlarge non-stuck windows by one line
3386 ;; (column) until `rest' is zero.
3388 (while (and sub
(> rest
0))
3389 (unless (window--resize-child-windows-skip-p window
)
3390 (set-window-new-total sub
1 t
)
3391 (setq rest
(1- rest
)))
3392 (setq sub
(window-right sub
)))
3394 ;; Fix rounding by trying to enlarge stuck windows by one line
3395 ;; (column) until `rest' equals zero.
3397 (while (and sub
(> rest
0))
3398 (unless (eq (window-new-normal sub
) 'ignore
)
3399 (set-window-new-total sub
1 t
)
3400 (setq rest
(1- rest
)))
3401 (setq sub
(window-right sub
)))
3405 ;; Record new normal sizes.
3406 (set-window-new-normal
3407 sub
(/ (if (eq (window-new-normal sub
) 'ignore
)
3408 (window-total-size sub horizontal
)
3409 (window-new-total sub
))
3410 (float parent-size
)))
3411 ;; Recursively balance each window's child windows.
3412 (balance-windows-1 sub horizontal
)
3413 (setq sub
(window-right sub
)))))
3415 (defun balance-windows-1 (window &optional horizontal
)
3416 "Subroutine of `balance-windows'."
3417 (if (window-child window
)
3418 (let ((sub (window-child window
)))
3419 (if (window-combined-p sub horizontal
)
3420 (balance-windows-2 window horizontal
)
3421 (let ((size (window-new-total window
)))
3423 (set-window-new-total sub size
)
3424 (balance-windows-1 sub horizontal
)
3425 (setq sub
(window-right sub
))))))))
3427 (defun balance-windows (&optional window-or-frame
)
3428 "Balance the sizes of windows of WINDOW-OR-FRAME.
3429 WINDOW-OR-FRAME is optional and defaults to the selected frame.
3430 If WINDOW-OR-FRAME denotes a frame, balance the sizes of all
3431 windows of that frame. If WINDOW-OR-FRAME denots a window,
3432 recursively balance the sizes of all child windows of that
3437 ((or (not window-or-frame
)
3438 (frame-live-p window-or-frame
))
3439 (frame-root-window window-or-frame
))
3440 ((or (window-live-p window-or-frame
)
3441 (window-child window-or-frame
))
3444 (error "Not a window or frame %s" window-or-frame
))))
3445 (frame (window-frame window
)))
3446 ;; Balance vertically.
3447 (window--resize-reset (window-frame window
))
3448 (balance-windows-1 window
)
3449 (window-resize-apply frame
)
3450 ;; Balance horizontally.
3451 (window--resize-reset (window-frame window
) t
)
3452 (balance-windows-1 window t
)
3453 (window-resize-apply frame t
)))
3455 (defun window-fixed-size-p (&optional window direction
)
3456 "Return t if WINDOW cannot be resized in DIRECTION.
3457 WINDOW defaults to the selected window. DIRECTION can be
3458 nil (i.e. any), `height' or `width'."
3459 (with-current-buffer (window-buffer window
)
3460 (when (and (boundp 'window-size-fixed
) window-size-fixed
)
3462 (member (cons direction window-size-fixed
)
3463 '((height . width
) (width . height
))))))))
3465 ;;; A different solution to balance-windows.
3466 (defvar window-area-factor
1
3467 "Factor by which the window area should be over-estimated.
3468 This is used by `balance-windows-area'.
3469 Changing this globally has no effect.")
3470 (make-variable-buffer-local 'window-area-factor
)
3472 (defun balance-windows-area-adjust (window delta horizontal
)
3473 "Wrapper around `window-resize' with error checking.
3474 Arguments WINDOW, DELTA and HORIZONTAL are passed on to that function."
3475 ;; `window-resize' may fail if delta is too large.
3476 (while (>= (abs delta
) 1)
3479 (window-resize window delta horizontal
)
3482 ;;(message "adjust: %s" (error-message-string err))
3483 (setq delta
(/ delta
2))))))
3485 (defun balance-windows-area ()
3486 "Make all visible windows the same area (approximately).
3487 See also `window-area-factor' to change the relative size of
3490 (let* ((unchanged 0) (carry 0) (round 0)
3491 ;; Remove fixed-size windows.
3492 (wins (delq nil
(mapcar (lambda (win)
3493 (if (not (window-fixed-size-p win
)) win
))
3494 (window-list nil
'nomini
))))
3497 ;; Resizing a window changes the size of surrounding windows in complex
3498 ;; ways, so it's difficult to balance them all. The introduction of
3499 ;; `adjust-window-trailing-edge' made it a bit easier, but it is still
3500 ;; very difficult to do. `balance-window' above takes an off-line
3501 ;; approach: get the whole window tree, then balance it, then try to
3502 ;; adjust the windows so they fit the result.
3503 ;; Here, instead, we take a "local optimization" approach, where we just
3504 ;; go through all the windows several times until nothing needs to be
3505 ;; changed. The main problem with this approach is that it's difficult
3506 ;; to make sure it terminates, so we use some heuristic to try and break
3507 ;; off infinite loops.
3508 ;; After a round without any change, we allow a second, to give a chance
3509 ;; to the carry to propagate a minor imbalance from the end back to
3511 (while (< unchanged
2)
3512 ;; (message "New round")
3513 (setq unchanged
(1+ unchanged
) round
(1+ round
))
3516 (while (progn (setq next
(next-window next
))
3517 (window-fixed-size-p next
)))
3518 ;; (assert (eq next (or (cadr (member win wins)) (car wins))))
3520 (< (car (window-edges win
)) (car (window-edges next
))))
3521 (areadiff (/ (- (* (window-height next
) (window-width next
)
3522 (buffer-local-value 'window-area-factor
3523 (window-buffer next
)))
3524 (* (window-height win
) (window-width win
)
3525 (buffer-local-value 'window-area-factor
3526 (window-buffer win
))))
3527 (max (buffer-local-value 'window-area-factor
3528 (window-buffer win
))
3529 (buffer-local-value 'window-area-factor
3530 (window-buffer next
)))))
3532 (+ (window-height win
) (window-height next
))
3533 (+ (window-width win
) (window-width next
))))
3534 (diff (/ areadiff edgesize
)))
3536 ;; Maybe diff is actually closer to 1 than to 0.
3537 (setq diff
(/ (* 3 areadiff
) (* 2 edgesize
))))
3538 (when (and (zerop diff
) (not (zerop areadiff
)))
3539 (setq diff
(/ (+ areadiff carry
) edgesize
))
3540 ;; Change things smoothly.
3541 (if (or (> diff
1) (< diff -
1)) (setq diff
(/ diff
2))))
3543 ;; Make sure negligible differences don't accumulate to
3544 ;; become significant.
3545 (setq carry
(+ carry areadiff
))
3546 ;; This used `adjust-window-trailing-edge' before and uses
3547 ;; `window-resize' now. Error wrapping is still needed.
3548 (balance-windows-area-adjust win diff horiz
)
3550 (let ((change (cons win
(window-edges win
))))
3551 ;; If the same change has been seen already for this window,
3552 ;; we're most likely in an endless loop, so don't count it as
3554 (unless (member change changelog
)
3555 (push change changelog
)
3556 (setq unchanged
0 carry
0)))))))
3557 ;; We've now basically balanced all the windows.
3558 ;; But there may be some minor off-by-one imbalance left over,
3559 ;; so let's do some fine tuning.
3560 ;; (bw-finetune wins)
3561 ;; (message "Done in %d rounds" round)
3564 ;;; Window states, how to get them and how to put them in a window.
3565 (defsubst window-list-no-nils
(&rest args
)
3566 "Like LIST but do not add nil elements of ARGS."
3567 (delq nil
(apply 'list args
)))
3569 (defvar window-state-ignored-parameters
'(quit-restore)
3570 "List of window parameters ignored by `window-state-get'.")
3572 (defun window-state-get-1 (window &optional markers
)
3573 "Helper function for `window-state-get'."
3576 ((window-top-child window
) 'vc
)
3577 ((window-left-child window
) 'hc
)
3579 (buffer (window-buffer window
))
3580 (selected (eq window
(selected-window)))
3582 (window-list-no-nils
3584 (unless (window-next-sibling window
) (cons 'last t
))
3585 (cons 'total-height
(window-total-size window
))
3586 (cons 'total-width
(window-total-size window t
))
3587 (cons 'normal-height
(window-normal-size window
))
3588 (cons 'normal-width
(window-normal-size window t
))
3589 (cons 'splits
(window-splits window
))
3590 (cons 'nest
(window-nest window
))
3592 (dolist (parameter (window-parameters window
))
3593 (unless (memq (car parameter
)
3594 window-state-ignored-parameters
)
3595 (setq list
(cons parameter list
))))
3596 (unless (window-parameter window
'clone-of
)
3597 ;; Make a clone-of parameter.
3598 (setq list
(cons (cons 'clone-of window
) list
)))
3600 (cons 'parameters list
)))
3602 ;; All buffer related things go in here - make the buffer
3603 ;; current when retrieving `point' and `mark'.
3604 (with-current-buffer (window-buffer window
)
3605 (let ((point (window-point-1 window
))
3606 (start (window-start window
))
3608 (window-list-no-nils
3609 'buffer
(buffer-name buffer
)
3610 (cons 'selected selected
)
3611 (when window-size-fixed
(cons 'size-fixed window-size-fixed
))
3612 (cons 'hscroll
(window-hscroll window
))
3613 (cons 'fringes
(window-fringes window
))
3614 (cons 'margins
(window-margins window
))
3615 (cons 'scroll-bars
(window-scroll-bars window
))
3616 (cons 'vscroll
(window-vscroll window
))
3617 (cons 'dedicated
(window-dedicated-p window
))
3618 (cons 'point
(if markers
(copy-marker point
) point
))
3619 (cons 'start
(if markers
(copy-marker start
) start
))
3621 (cons 'mark
(if markers
(copy-marker mark
) mark
)))))))))
3623 (when (memq type
'(vc hc
))
3625 (setq window
(window-child window
))
3627 (setq list
(cons (window-state-get-1 window markers
) list
))
3628 (setq window
(window-right window
)))
3630 (append head tail
)))
3632 (defun window-state-get (&optional window markers
)
3633 "Return state of WINDOW as a Lisp object.
3634 WINDOW can be any window and defaults to the root window of the
3637 Optional argument MARKERS non-nil means use markers for sampling
3638 positions like `window-point' or `window-start'. MARKERS should
3639 be non-nil only if the value is used for putting the state back
3640 in the same session (note that markers slow down processing).
3642 The return value can be used as argument for `window-state-put'
3643 to put the state recorded here into an arbitrary window. The
3644 value can be also stored on disk and read back in a new session."
3647 (if (window-valid-p window
)
3649 (error "%s is not a live or internal window" window
))
3650 (frame-root-window)))
3651 ;; The return value is a cons whose car specifies some constraints on
3652 ;; the size of WINDOW. The cdr lists the states of the child windows
3655 ;; Frame related things would go into a function, say `frame-state',
3656 ;; calling `window-state-get' to insert the frame's root window.
3657 (window-list-no-nils
3658 (cons 'min-height
(window-min-size window
))
3659 (cons 'min-width
(window-min-size window t
))
3660 (cons 'min-height-ignore
(window-min-size window nil t
))
3661 (cons 'min-width-ignore
(window-min-size window t t
))
3662 (cons 'min-height-safe
(window-min-size window nil
'safe
))
3663 (cons 'min-width-safe
(window-min-size window t
'safe
))
3664 ;; These are probably not needed.
3665 (when (window-size-fixed-p window
) (cons 'fixed-height t
))
3666 (when (window-size-fixed-p window t
) (cons 'fixed-width t
)))
3667 (window-state-get-1 window markers
)))
3669 (defvar window-state-put-list nil
3670 "Helper variable for `window-state-put'.")
3672 (defun window-state-put-1 (state &optional window ignore totals
)
3673 "Helper function for `window-state-put'."
3674 (let ((type (car state
)))
3675 (setq state
(cdr state
))
3678 ;; For a leaf window just add unprocessed entries to
3679 ;; `window-state-put-list'.
3680 (setq window-state-put-list
3681 (cons (cons window state
) window-state-put-list
)))
3682 ((memq type
'(vc hc
))
3683 (let* ((horizontal (eq type
'hc
))
3684 (total (window-total-size window horizontal
))
3687 (dolist (item state
)
3688 ;; Find the next child window. WINDOW always points to the
3689 ;; real window that we want to fill with what we find here.
3690 (when (memq (car item
) '(leaf vc hc
))
3691 (if (assq 'last item
)
3692 ;; The last child window. Below `window-state-put-1'
3693 ;; will put into it whatever ITEM has in store.
3695 ;; Not the last child window, prepare for splitting
3696 ;; WINDOW. SIZE is the new (and final) size of the old
3701 (cdr (assq (if horizontal
'total-width
'total-height
) item
))
3702 ;; Use normalized size and round.
3705 (if horizontal
'normal-width
'normal-height
)
3708 ;; Use safe sizes, we try to resize later.
3709 (setq size
(max size
(if horizontal
3710 window-safe-min-height
3711 window-safe-min-width
)))
3713 (if (window-sizable-p window
(- size
) horizontal
'safe
)
3714 (let* ((window-nest (assq 'nest item
)))
3715 ;; We must inherit the nesting, otherwise we might mess
3716 ;; up handling of atomic and side window.
3717 (setq new
(split-window window size horizontal
)))
3718 ;; Give up if we can't resize window down to safe sizes.
3719 (error "Cannot resize window %s" window
))
3723 ;; When creating the first child window add for parent
3724 ;; unprocessed entries to `window-state-put-list'.
3725 (setq window-state-put-list
3726 (cons (cons (window-parent window
) state
)
3727 window-state-put-list
))))
3729 ;; Now process the current window (either the one we've just
3730 ;; split or the last child of its parent).
3731 (window-state-put-1 item window ignore totals
)
3732 ;; Continue with the last window split off.
3733 (setq window new
))))))))
3735 (defun window-state-put-2 (ignore)
3736 "Helper function for `window-state-put'."
3737 (dolist (item window-state-put-list
)
3738 (let ((window (car item
))
3739 (splits (cdr (assq 'splits item
)))
3740 (nest (cdr (assq 'nest item
)))
3741 (parameters (cdr (assq 'parameters item
)))
3742 (state (cdr (assq 'buffer item
))))
3743 (when splits
(set-window-splits window splits
))
3744 (when nest
(set-window-nest window nest
))
3745 ;; Process parameters.
3747 (dolist (parameter parameters
)
3748 (set-window-parameter window
(car parameter
) (cdr parameter
))))
3749 ;; Process buffer related state.
3751 ;; We don't want to raise an error here so we create a buffer if
3753 (set-window-buffer window
(get-buffer-create (car state
)))
3754 (with-current-buffer (window-buffer window
)
3755 (set-window-hscroll window
(cdr (assq 'hscroll state
)))
3756 (apply 'set-window-fringes
3757 (cons window
(cdr (assq 'fringes state
))))
3758 (let ((margins (cdr (assq 'margins state
))))
3759 (set-window-margins window
(car margins
) (cdr margins
)))
3760 (let ((scroll-bars (cdr (assq 'scroll-bars state
))))
3761 (set-window-scroll-bars
3762 window
(car scroll-bars
) (nth 2 scroll-bars
) (nth 3 scroll-bars
)))
3763 (set-window-vscroll window
(cdr (assq 'vscroll state
)))
3764 ;; Adjust vertically.
3765 (if (memq window-size-fixed
'(t height
))
3766 ;; A fixed height window, try to restore the original size.
3767 (let ((delta (- (cdr (assq 'total-height item
))
3768 (window-total-height window
)))
3770 (when (window-resizable-p window delta
)
3771 (window-resize window delta
)))
3772 ;; Else check whether the window is not high enough.
3773 (let* ((min-size (window-min-size window nil ignore
))
3774 (delta (- min-size
(window-total-size window
))))
3775 (when (and (> delta
0)
3776 (window-resizable-p window delta nil ignore
))
3777 (window-resize window delta nil ignore
))))
3778 ;; Adjust horizontally.
3779 (if (memq window-size-fixed
'(t width
))
3780 ;; A fixed width window, try to restore the original size.
3781 (let ((delta (- (cdr (assq 'total-width item
))
3782 (window-total-width window
)))
3784 (when (window-resizable-p window delta
)
3785 (window-resize window delta
)))
3786 ;; Else check whether the window is not wide enough.
3787 (let* ((min-size (window-min-size window t ignore
))
3788 (delta (- min-size
(window-total-size window t
))))
3789 (when (and (> delta
0)
3790 (window-resizable-p window delta t ignore
))
3791 (window-resize window delta t ignore
))))
3792 ;; Set dedicated status.
3793 (set-window-dedicated-p window
(cdr (assq 'dedicated state
)))
3794 ;; Install positions (maybe we should do this after all windows
3795 ;; have been created and sized).
3797 (set-window-start window
(cdr (assq 'start state
)))
3798 (set-window-point window
(cdr (assq 'point state
)))
3799 ;; I'm not sure whether we should set the mark here, but maybe
3801 (let ((mark (cdr (assq 'mark state
))))
3802 (when mark
(set-mark mark
))))
3803 ;; Select window if it's the selected one.
3804 (when (cdr (assq 'selected state
))
3805 (select-window window
)))))))
3807 (defun window-state-put (state &optional window ignore
)
3808 "Put window state STATE into WINDOW.
3809 STATE should be the state of a window returned by an earlier
3810 invocation of `window-state-get'. Optional argument WINDOW must
3811 specify a live window and defaults to the selected one.
3813 Optional argument IGNORE non-nil means ignore minimum window
3814 sizes and fixed size restrictions. IGNORE equal `safe' means
3815 windows can get as small as `window-safe-min-height' and
3816 `window-safe-min-width'."
3817 (setq window
(window-normalize-window window t
))
3818 (let* ((frame (window-frame window
))
3820 ;; We check here (1) whether the total sizes of root window of
3821 ;; STATE and that of WINDOW are equal so we can avoid
3822 ;; calculating new sizes, and (2) if we do have to resize
3823 ;; whether we can do so without violating size restrictions.
3825 (and (= (window-total-size window
)
3826 (cdr (assq 'total-height state
)))
3827 (= (window-total-size window t
)
3828 (cdr (assq 'total-width state
)))))
3829 (min-height (cdr (assq 'min-height head
)))
3830 (min-width (cdr (assq 'min-width head
)))
3831 window-splits selected
)
3832 (if (and (not totals
)
3833 (or (> min-height
(window-total-size window
))
3834 (> min-width
(window-total-size window t
)))
3836 (and (setq min-height
3837 (cdr (assq 'min-height-ignore head
)))
3839 (cdr (assq 'min-width-ignore head
)))
3840 (or (> min-height
(window-total-size window
))
3841 (> min-width
(window-total-size window t
)))
3842 (or (not (eq ignore
'safe
))
3843 (and (setq min-height
3844 (cdr (assq 'min-height-safe head
)))
3846 (cdr (assq 'min-width-safe head
)))
3848 (window-total-size window
))
3850 (window-total-size window t
))))))))
3851 ;; The check above might not catch all errors due to rounding
3852 ;; issues - so IGNORE equal 'safe might not always produce the
3853 ;; minimum possible state. But such configurations hardly make
3855 (error "Window %s too small to accommodate state" window
)
3856 (setq state
(cdr state
))
3857 (setq window-state-put-list nil
)
3858 ;; Work on the windows of a temporary buffer to make sure that
3859 ;; splitting proceeds regardless of any buffer local values of
3860 ;; `window-size-fixed'. Release that buffer after the buffers of
3861 ;; all live windows have been set by `window-state-put-2'.
3863 (set-window-buffer window
(current-buffer))
3864 (window-state-put-1 state window nil totals
)
3865 (window-state-put-2 ignore
))
3866 (window-check frame
))))
3868 (defun display-buffer-record-window (type window buffer
)
3869 "Record information for window used by `display-buffer'.
3870 TYPE specifies the type of the calling operation and must be one
3871 of the symbols 'reuse \(when WINDOW existed already and was
3872 reused for displaying BUFFER), 'window \(when WINDOW was created
3873 on an already existing frame), or 'frame \(when WINDOW was
3874 created on a new frame). WINDOW is the window used for or created
3875 by the `display-buffer' routines. BUFFER is the buffer that
3878 This function installs or updates the quit-restore parameter of
3879 WINDOW. The quit-restore parameter is a list of four elements:
3880 The first element is one of the symbols 'window, 'frame, 'same or
3881 'other. The second element is either one of the symbols 'window
3882 or 'frame or a list whose elements are the buffer previously
3883 shown in the window, that buffer's window start and window point,
3884 and the window's height. The third element is the window
3885 selected at the time the parameter was created. The fourth
3889 (if (eq (window-buffer window
) buffer
)
3890 ;; WINDOW shows BUFFER already.
3891 (when (consp (window-parameter window
'quit-restore
))
3892 ;; If WINDOW has a quit-restore parameter, reset its car.
3893 (setcar (window-parameter window
'quit-restore
) 'same
))
3894 ;; WINDOW shows another buffer.
3895 (set-window-parameter
3896 window
'quit-restore
3898 ;; A quadruple of WINDOW's buffer, start, point and height.
3899 (list (window-buffer window
) (window-start window
)
3900 (window-point-1 window
) (window-total-size window
))
3901 (selected-window) buffer
))))
3903 ;; WINDOW has been created on an existing frame.
3904 (set-window-parameter
3905 window
'quit-restore
3906 (list 'window
'window
(selected-window) buffer
)))
3908 ;; WINDOW has been created on a new frame.
3909 (set-window-parameter
3910 window
'quit-restore
3911 (list 'frame
'frame
(selected-window) buffer
)))))
3913 (defcustom display-buffer-function nil
3914 "If non-nil, function to call to handle `display-buffer'.
3915 It will receive two args, the buffer and a flag which if non-nil
3916 means that the currently selected window is not acceptable. It
3917 should choose or create a window, display the specified buffer in
3918 it, and return the window.
3920 The specified function should call `display-buffer-record-window'
3921 with corresponding arguments to set up the quit-restore parameter
3922 of the window used."
3925 (function :tag
"function"))
3928 (defcustom pop-up-frame-alist nil
3929 "Alist of parameters for automatically generated new frames.
3930 You can set this in your init file; for example,
3932 (setq pop-up-frame-alist '((width . 80) (height . 20)))
3934 If non-nil, the value you specify here is used by the default
3935 `pop-up-frame-function' for the creation of new frames.
3937 Since `pop-up-frame-function' is used by `display-buffer' for
3938 making new frames, any value specified here by default affects
3939 the automatic generation of new frames via `display-buffer' and
3940 all functions based on it. The behavior of `make-frame' is not
3941 affected by this variable."
3942 :type
'(repeat (cons :format
"%v"
3943 (symbol :tag
"Parameter")
3944 (sexp :tag
"Value")))
3947 (defcustom pop-up-frame-function
3948 (lambda () (make-frame pop-up-frame-alist
))
3949 "Function used by `display-buffer' for creating a new frame.
3950 This function is called with no arguments and should return a new
3951 frame. The default value calls `make-frame' with the argument
3952 `pop-up-frame-alist'."
3956 (defcustom special-display-buffer-names nil
3957 "List of names of buffers that should be displayed specially.
3958 Displaying a buffer with `display-buffer' or `pop-to-buffer', if
3959 its name is in this list, displays the buffer in a way specified
3960 by `special-display-function'. `special-display-popup-frame'
3961 \(the default for `special-display-function') usually displays
3962 the buffer in a separate frame made with the parameters specified
3963 by `special-display-frame-alist'. If `special-display-function'
3964 has been set to some other function, that function is called with
3965 the buffer as first, and nil as second argument.
3967 Alternatively, an element of this list can be specified as
3968 \(BUFFER-NAME FRAME-PARAMETERS), where BUFFER-NAME is a buffer
3969 name and FRAME-PARAMETERS an alist of \(PARAMETER . VALUE) pairs.
3970 `special-display-popup-frame' will interpret such pairs as frame
3971 parameters when it creates a special frame, overriding the
3972 corresponding values from `special-display-frame-alist'.
3974 As a special case, if FRAME-PARAMETERS contains (same-window . t)
3975 `special-display-popup-frame' displays that buffer in the
3976 selected window. If FRAME-PARAMETERS contains (same-frame . t),
3977 it displays that buffer in a window on the selected frame.
3979 If `special-display-function' specifies some other function than
3980 `special-display-popup-frame', that function is called with the
3981 buffer named BUFFER-NAME as first, and FRAME-PARAMETERS as second
3984 Finally, an element of this list can be also specified as
3985 \(BUFFER-NAME FUNCTION OTHER-ARGS). In that case,
3986 `special-display-popup-frame' will call FUNCTION with the buffer
3987 named BUFFER-NAME as first argument, and OTHER-ARGS as the
3990 Any alternative function specified here is responsible for
3991 setting up the quit-restore parameter of the window used.
3993 If this variable appears \"not to work\", because you added a
3994 name to it but the corresponding buffer is displayed in the
3995 selected window, look at the values of `same-window-buffer-names'
3996 and `same-window-regexps'. Those variables take precedence over
3999 See also `special-display-regexps'."
4001 (choice :tag
"Buffer"
4003 (string :format
"%v")
4004 (cons :tag
"With parameters"
4007 (string :format
"%v")
4008 (repeat :tag
"Parameters"
4010 (symbol :tag
"Parameter")
4011 (sexp :tag
"Value"))))
4012 (list :tag
"With function"
4015 (string :format
"%v")
4016 (function :tag
"Function")
4017 (repeat :tag
"Arguments" (sexp)))))
4022 (put 'special-display-buffer-names
'risky-local-variable t
)
4024 (defcustom special-display-regexps nil
4025 "List of regexps saying which buffers should be displayed specially.
4026 Displaying a buffer with `display-buffer' or `pop-to-buffer', if
4027 any regexp in this list matches its name, displays it specially
4028 using `special-display-function'. `special-display-popup-frame'
4029 \(the default for `special-display-function') usually displays
4030 the buffer in a separate frame made with the parameters specified
4031 by `special-display-frame-alist'. If `special-display-function'
4032 has been set to some other function, that function is called with
4033 the buffer as first, and nil as second argument.
4035 Alternatively, an element of this list can be specified as
4036 \(REGEXP FRAME-PARAMETERS), where REGEXP is a regexp as above and
4037 FRAME-PARAMETERS an alist of (PARAMETER . VALUE) pairs.
4038 `special-display-popup-frame' will then interpret these pairs as
4039 frame parameters when creating a special frame for a buffer whose
4040 name matches REGEXP, overriding the corresponding values from
4041 `special-display-frame-alist'.
4043 As a special case, if FRAME-PARAMETERS contains (same-window . t)
4044 `special-display-popup-frame' displays buffers matching REGEXP in
4045 the selected window. \(same-frame . t) in FRAME-PARAMETERS means
4046 to display such buffers in a window on the selected frame.
4048 If `special-display-function' specifies some other function than
4049 `special-display-popup-frame', that function is called with the
4050 buffer whose name matched REGEXP as first, and FRAME-PARAMETERS
4053 Finally, an element of this list can be also specified as
4054 \(REGEXP FUNCTION OTHER-ARGS). `special-display-popup-frame'
4055 will then call FUNCTION with the buffer whose name matched
4056 REGEXP as first, and OTHER-ARGS as second argument.
4058 Any alternative function specified here is responsible for
4059 setting up the quit-restore parameter of the window used.
4061 If this variable appears \"not to work\", because you added a
4062 name to it but the corresponding buffer is displayed in the
4063 selected window, look at the values of `same-window-buffer-names'
4064 and `same-window-regexps'. Those variables take precedence over
4067 See also `special-display-buffer-names'."
4069 (choice :tag
"Buffer"
4071 (regexp :format
"%v")
4072 (cons :tag
"With parameters"
4075 (regexp :format
"%v")
4076 (repeat :tag
"Parameters"
4078 (symbol :tag
"Parameter")
4079 (sexp :tag
"Value"))))
4080 (list :tag
"With function"
4083 (regexp :format
"%v")
4084 (function :tag
"Function")
4085 (repeat :tag
"Arguments" (sexp)))))
4089 (defun special-display-p (buffer-name)
4090 "Return non-nil if a buffer named BUFFER-NAME gets a special frame.
4091 More precisely, return t if `special-display-buffer-names' or
4092 `special-display-regexps' contain a string entry equaling or
4093 matching BUFFER-NAME. If `special-display-buffer-names' or
4094 `special-display-regexps' contain a list entry whose car equals
4095 or matches BUFFER-NAME, the return value is the cdr of that
4099 ((not (stringp buffer-name
)))
4100 ((member buffer-name special-display-buffer-names
)
4102 ((setq tmp
(assoc buffer-name special-display-buffer-names
))
4105 (dolist (regexp special-display-regexps
)
4108 (when (string-match-p regexp buffer-name
)
4110 ((and (consp regexp
) (stringp (car regexp
))
4111 (string-match-p (car regexp
) buffer-name
))
4112 (throw 'found
(cdr regexp
))))))))))
4114 (defcustom special-display-frame-alist
4115 '((height .
14) (width .
80) (unsplittable . t
))
4116 "Alist of parameters for special frames.
4117 Special frames are used for buffers whose names are listed in
4118 `special-display-buffer-names' and for buffers whose names match
4119 one of the regular expressions in `special-display-regexps'.
4121 This variable can be set in your init file, like this:
4123 (setq special-display-frame-alist '((width . 80) (height . 20)))
4125 These supersede the values given in `default-frame-alist'."
4126 :type
'(repeat (cons :format
"%v"
4127 (symbol :tag
"Parameter")
4128 (sexp :tag
"Value")))
4131 (defun special-display-popup-frame (buffer &optional args
)
4132 "Display BUFFER and return the window chosen.
4133 If BUFFER is already displayed in a visible or iconified frame,
4134 raise that frame. Otherwise, display BUFFER in a new frame.
4136 Optional argument ARGS is a list specifying additional
4139 If ARGS is an alist, use it as a list of frame parameters. If
4140 these parameters contain \(same-window . t), display BUFFER in
4141 the selected window. If they contain \(same-frame . t), display
4142 BUFFER in a window of the selected frame.
4144 If ARGS is a list whose car is a symbol, use (car ARGS) as a
4145 function to do the work. Pass it BUFFER as first argument,
4146 and (cdr ARGS) as second."
4147 (if (and args
(symbolp (car args
)))
4148 (apply (car args
) buffer
(cdr args
))
4149 (let ((window (get-buffer-window buffer
0)))
4151 ;; If we have a window already, make it visible.
4153 (let ((frame (window-frame window
)))
4154 (make-frame-visible frame
)
4156 (display-buffer-record-window 'reuse window buffer
)
4158 ;; Reuse the current window if the user requested it.
4159 (when (cdr (assq 'same-window args
))
4161 (progn (switch-to-buffer buffer nil t
) (selected-window))
4163 ;; Stay on the same frame if requested.
4164 (when (or (cdr (assq 'same-frame args
)) (cdr (assq 'same-window args
)))
4165 (let* ((pop-up-windows t
)
4167 special-display-buffer-names special-display-regexps
)
4168 (display-buffer buffer
)))
4169 ;; If no window yet, make one in a new frame.
4171 (with-current-buffer buffer
4172 (make-frame (append args special-display-frame-alist
))))
4173 (window (frame-selected-window frame
)))
4174 (display-buffer-record-window 'frame window buffer
)
4175 (set-window-buffer window buffer
)
4176 ;; Reset list of WINDOW's previous buffers to nil.
4177 (set-window-prev-buffers window nil
)
4178 (set-window-dedicated-p window t
)
4181 (defcustom special-display-function
'special-display-popup-frame
4182 "Function to call for displaying special buffers.
4183 This function is called with two arguments - the buffer and,
4184 optionally, a list - and should return a window displaying that
4185 buffer. The default value usually makes a separate frame for the
4186 buffer using `special-display-frame-alist' to specify the frame
4187 parameters. See the definition of `special-display-popup-frame'
4188 for how to specify such a function.
4190 A buffer is special when its name is either listed in
4191 `special-display-buffer-names' or matches a regexp in
4192 `special-display-regexps'.
4194 The specified function should call `display-buffer-record-window'
4195 with corresponding arguments to set up the quit-restore parameter
4196 of the window used."
4200 (defcustom same-window-buffer-names nil
4201 "List of names of buffers that should appear in the \"same\" window.
4202 `display-buffer' and `pop-to-buffer' show a buffer whose name is
4203 on this list in the selected rather than some other window.
4205 An element of this list can be a cons cell instead of just a
4206 string. In that case, the cell's car must be a string specifying
4207 the buffer name. This is for compatibility with
4208 `special-display-buffer-names'; the cdr of the cons cell is
4211 See also `same-window-regexps'."
4212 :type
'(repeat (string :format
"%v"))
4215 (defcustom same-window-regexps nil
4216 "List of regexps saying which buffers should appear in the \"same\" window.
4217 `display-buffer' and `pop-to-buffer' show a buffer whose name
4218 matches a regexp on this list in the selected rather than some
4221 An element of this list can be a cons cell instead of just a
4222 string. In that case, the cell's car must be a regexp matching
4223 the buffer name. This is for compatibility with
4224 `special-display-regexps'; the cdr of the cons cell is ignored.
4226 See also `same-window-buffer-names'."
4227 :type
'(repeat (regexp :format
"%v"))
4230 (defun same-window-p (buffer-name)
4231 "Return non-nil if a buffer named BUFFER-NAME would be shown in the \"same\" window.
4232 This function returns non-nil if `display-buffer' or
4233 `pop-to-buffer' would show a buffer named BUFFER-NAME in the
4234 selected rather than \(as usual\) some other window. See
4235 `same-window-buffer-names' and `same-window-regexps'."
4237 ((not (stringp buffer-name
)))
4238 ;; The elements of `same-window-buffer-names' can be buffer
4239 ;; names or cons cells whose cars are buffer names.
4240 ((member buffer-name same-window-buffer-names
))
4241 ((assoc buffer-name same-window-buffer-names
))
4243 (dolist (regexp same-window-regexps
)
4244 ;; The elements of `same-window-regexps' can be regexps
4245 ;; or cons cells whose cars are regexps.
4246 (when (or (and (stringp regexp
)
4247 (string-match regexp buffer-name
))
4248 (and (consp regexp
) (stringp (car regexp
))
4249 (string-match-p (car regexp
) buffer-name
)))
4250 (throw 'found t
)))))))
4252 (defcustom pop-up-frames nil
4253 "Whether `display-buffer' should make a separate frame.
4254 If nil, never make a separate frame.
4255 If the value is `graphic-only', make a separate frame
4256 on graphic displays only.
4257 Any other non-nil value means always make a separate frame."
4259 (const :tag
"Never" nil
)
4260 (const :tag
"On graphic displays only" graphic-only
)
4261 (const :tag
"Always" t
))
4264 (defcustom display-buffer-reuse-frames nil
4265 "Non-nil means `display-buffer' should reuse frames.
4266 If the buffer in question is already displayed in a frame, raise
4272 (defcustom pop-up-windows t
4273 "Non-nil means `display-buffer' should make a new window."
4277 (defcustom split-window-preferred-function
'split-window-sensibly
4278 "Function called by `display-buffer' routines to split a window.
4279 This function is called with a window as single argument and is
4280 supposed to split that window and return the new window. If the
4281 window can (or shall) not be split, it is supposed to return nil.
4282 The default is to call the function `split-window-sensibly' which
4283 tries to split the window in a way which seems most suitable.
4284 You can customize the options `split-height-threshold' and/or
4285 `split-width-threshold' in order to have `split-window-sensibly'
4286 prefer either vertical or horizontal splitting.
4288 If you set this to any other function, bear in mind that the
4289 `display-buffer' routines may call this function two times. The
4290 argument of the first call is the largest window on its frame.
4291 If that call fails to return a live window, the function is
4292 called again with the least recently used window as argument. If
4293 that call fails too, `display-buffer' will use an existing window
4294 to display its buffer.
4296 The window selected at the time `display-buffer' was invoked is
4297 still selected when this function is called. Hence you can
4298 compare the window argument with the value of `selected-window'
4299 if you intend to split the selected window instead or if you do
4300 not want to split the selected window."
4305 (defcustom split-height-threshold
80
4306 "Minimum height for splitting windows sensibly.
4307 If this is an integer, `split-window-sensibly' may split a window
4308 vertically only if it has at least this many lines. If this is
4309 nil, `split-window-sensibly' is not allowed to split a window
4310 vertically. If, however, a window is the only window on its
4311 frame, `split-window-sensibly' may split it vertically
4312 disregarding the value of this variable."
4313 :type
'(choice (const nil
) (integer :tag
"lines"))
4317 (defcustom split-width-threshold
160
4318 "Minimum width for splitting windows sensibly.
4319 If this is an integer, `split-window-sensibly' may split a window
4320 horizontally only if it has at least this many columns. If this
4321 is nil, `split-window-sensibly' is not allowed to split a window
4323 :type
'(choice (const nil
) (integer :tag
"columns"))
4327 (defun window-splittable-p (window &optional horizontal
)
4328 "Return non-nil if `split-window-sensibly' may split WINDOW.
4329 Optional argument HORIZONTAL nil or omitted means check whether
4330 `split-window-sensibly' may split WINDOW vertically. HORIZONTAL
4331 non-nil means check whether WINDOW may be split horizontally.
4333 WINDOW may be split vertically when the following conditions
4335 - `window-size-fixed' is either nil or equals `width' for the
4337 - `split-height-threshold' is an integer and WINDOW is at least as
4338 high as `split-height-threshold'.
4339 - When WINDOW is split evenly, the emanating windows are at least
4340 `window-min-height' lines tall and can accommodate at least one
4341 line plus - if WINDOW has one - a mode line.
4343 WINDOW may be split horizontally when the following conditions
4345 - `window-size-fixed' is either nil or equals `height' for the
4347 - `split-width-threshold' is an integer and WINDOW is at least as
4348 wide as `split-width-threshold'.
4349 - When WINDOW is split evenly, the emanating windows are at least
4350 `window-min-width' or two (whichever is larger) columns wide."
4351 (when (window-live-p window
)
4352 (with-current-buffer (window-buffer window
)
4354 ;; A window can be split horizontally when its width is not
4355 ;; fixed, it is at least `split-width-threshold' columns wide
4356 ;; and at least twice as wide as `window-min-width' and 2 (the
4357 ;; latter value is hardcoded).
4358 (and (memq window-size-fixed
'(nil height
))
4359 ;; Testing `window-full-width-p' here hardly makes any
4360 ;; sense nowadays. This can be done more intuitively by
4361 ;; setting up `split-width-threshold' appropriately.
4362 (numberp split-width-threshold
)
4363 (>= (window-width window
)
4364 (max split-width-threshold
4365 (* 2 (max window-min-width
2)))))
4366 ;; A window can be split vertically when its height is not
4367 ;; fixed, it is at least `split-height-threshold' lines high,
4368 ;; and it is at least twice as high as `window-min-height' and 2
4369 ;; if it has a modeline or 1.
4370 (and (memq window-size-fixed
'(nil width
))
4371 (numberp split-height-threshold
)
4372 (>= (window-height window
)
4373 (max split-height-threshold
4374 (* 2 (max window-min-height
4375 (if mode-line-format
2 1))))))))))
4377 (defun split-window-sensibly (window)
4378 "Split WINDOW in a way suitable for `display-buffer'.
4379 If `split-height-threshold' specifies an integer, WINDOW is at
4380 least `split-height-threshold' lines tall and can be split
4381 vertically, split WINDOW into two windows one above the other and
4382 return the lower window. Otherwise, if `split-width-threshold'
4383 specifies an integer, WINDOW is at least `split-width-threshold'
4384 columns wide and can be split horizontally, split WINDOW into two
4385 windows side by side and return the window on the right. If this
4386 can't be done either and WINDOW is the only window on its frame,
4387 try to split WINDOW vertically disregarding any value specified
4388 by `split-height-threshold'. If that succeeds, return the lower
4389 window. Return nil otherwise.
4391 By default `display-buffer' routines call this function to split
4392 the largest or least recently used window. To change the default
4393 customize the option `split-window-preferred-function'.
4395 You can enforce this function to not split WINDOW horizontally,
4396 by setting \(or binding) the variable `split-width-threshold' to
4397 nil. If, in addition, you set `split-height-threshold' to zero,
4398 chances increase that this function does split WINDOW vertically.
4400 In order to not split WINDOW vertically, set \(or bind) the
4401 variable `split-height-threshold' to nil. Additionally, you can
4402 set `split-width-threshold' to zero to make a horizontal split
4403 more likely to occur.
4405 Have a look at the function `window-splittable-p' if you want to
4406 know how `split-window-sensibly' determines whether WINDOW can be
4408 (or (and (window-splittable-p window
)
4409 ;; Split window vertically.
4410 (with-selected-window window
4411 (split-window-below)))
4412 (and (window-splittable-p window t
)
4413 ;; Split window horizontally.
4414 (with-selected-window window
4415 (split-window-right)))
4416 (and (eq window
(frame-root-window (window-frame window
)))
4417 (not (window-minibuffer-p window
))
4418 ;; If WINDOW is the only window on its frame and is not the
4419 ;; minibuffer window, try to split it vertically disregarding
4420 ;; the value of `split-height-threshold'.
4421 (let ((split-height-threshold 0))
4422 (when (window-splittable-p window
)
4423 (with-selected-window window
4424 (split-window-below)))))))
4426 (defun window--try-to-split-window (window)
4427 "Try to split WINDOW.
4428 Return value returned by `split-window-preferred-function' if it
4429 represents a live window, nil otherwise."
4430 (and (window-live-p window
)
4431 (not (frame-parameter (window-frame window
) 'unsplittable
))
4433 ;; Since `split-window-preferred-function' might
4434 ;; throw an error use `condition-case'.
4436 (funcall split-window-preferred-function window
)
4438 (and (window-live-p new-window
) new-window
))))
4440 (defun window--frame-usable-p (frame)
4441 "Return FRAME if it can be used to display a buffer."
4442 (when (frame-live-p frame
)
4443 (let ((window (frame-root-window frame
)))
4444 ;; `frame-root-window' may be an internal window which is considered
4445 ;; "dead" by `window-live-p'. Hence if `window' is not live we
4446 ;; implicitly know that `frame' has a visible window we can use.
4447 (unless (and (window-live-p window
)
4448 (or (window-minibuffer-p window
)
4449 ;; If the window is soft-dedicated, the frame is usable.
4450 ;; Actually, even if the window is really dedicated,
4451 ;; the frame is still usable by splitting it.
4452 ;; At least Emacs-22 allowed it, and it is desirable
4453 ;; when displaying same-frame windows.
4454 nil
; (eq t (window-dedicated-p window))
4458 (defcustom even-window-heights t
4459 "If non-nil `display-buffer' will try to even window heights.
4460 Otherwise `display-buffer' will leave the window configuration
4461 alone. Heights are evened only when `display-buffer' chooses a
4462 window that appears above or below the selected window."
4466 (defun window--even-window-heights (window)
4467 "Even heights of WINDOW and selected window.
4468 Do this only if these windows are vertically adjacent to each
4469 other, `even-window-heights' is non-nil, and the selected window
4470 is higher than WINDOW."
4471 (when (and even-window-heights
4472 (not (eq window
(selected-window)))
4473 ;; Don't resize minibuffer windows.
4474 (not (window-minibuffer-p (selected-window)))
4475 (> (window-height (selected-window)) (window-height window
))
4476 (eq (window-frame window
) (window-frame (selected-window)))
4477 (let ((sel-edges (window-edges (selected-window)))
4478 (win-edges (window-edges window
)))
4479 (and (= (nth 0 sel-edges
) (nth 0 win-edges
))
4480 (= (nth 2 sel-edges
) (nth 2 win-edges
))
4481 (or (= (nth 1 sel-edges
) (nth 3 win-edges
))
4482 (= (nth 3 sel-edges
) (nth 1 win-edges
))))))
4483 (let ((window-min-height 1))
4484 ;; Don't throw an error if we can't even window heights for
4487 (enlarge-window (/ (- (window-height window
) (window-height)) 2))
4490 (defun window--display-buffer-1 (window)
4491 "Raise the frame containing WINDOW.
4492 Do not raise the selected frame. Return WINDOW."
4493 (let* ((frame (window-frame window
))
4494 (visible (frame-visible-p frame
)))
4495 (unless (or (not visible
)
4496 ;; Assume the selected frame is already visible enough.
4497 (eq frame
(selected-frame))
4498 ;; Assume the frame from which we invoked the minibuffer
4500 (and (minibuffer-window-active-p (selected-window))
4501 (eq frame
(window-frame (minibuffer-selected-window)))))
4502 (raise-frame frame
))
4505 (defun window--display-buffer-2 (buffer window
&optional dedicated
)
4506 "Display BUFFER in WINDOW and make its frame visible.
4507 Set `window-dedicated-p' to DEDICATED if non-nil.
4509 (when (and (buffer-live-p buffer
) (window-live-p window
))
4510 (set-window-buffer window buffer
)
4512 (set-window-dedicated-p window dedicated
))
4513 (window--display-buffer-1 window
)))
4515 (defvar display-buffer-mark-dedicated nil
4516 "If non-nil, `display-buffer' marks the windows it creates as dedicated.
4517 The actual non-nil value of this variable will be copied to the
4518 `window-dedicated-p' flag.")
4520 (defun window-normalize-buffer-to-display (buffer-or-name)
4521 "Normalize BUFFER-OR-NAME argument for buffer display functions.
4522 If BUFFER-OR-NAME is nil, return the curent buffer. Else, if a
4523 buffer specified by BUFFER-OR-NAME exists, return that buffer.
4524 If no such buffer exists, create a buffer with the name
4525 BUFFER-OR-NAME and return that buffer."
4527 (or (get-buffer buffer-or-name
)
4528 (let ((buffer (get-buffer-create buffer-or-name
)))
4529 (set-buffer-major-mode buffer
)
4533 (defconst display-buffer--action-function-custom-type
4534 '(choice :tag
"Function"
4535 (const :tag
"--" ignore
) ; default for insertion
4536 (const display-buffer-reuse-window
)
4537 (const display-buffer-use-some-window
)
4538 (const display-buffer-same-window
)
4539 (const display-buffer-pop-up-frame
)
4540 (const display-buffer-use-some-window
)
4541 (function :tag
"Other function"))
4542 "Custom type for `display-buffer' action functions.")
4544 (defconst display-buffer--action-custom-type
4545 `(cons :tag
"Action"
4546 (choice :tag
"Action functions"
4547 ,display-buffer--action-function-custom-type
4549 :tag
"List of functions"
4550 ,display-buffer--action-function-custom-type
))
4551 (alist :tag
"Action arguments"
4553 :value-type
(sexp :tag
"Value")))
4554 "Custom type for `display-buffer' actions.")
4556 (defvar display-buffer-overriding-action
'(nil . nil
)
4557 "Overriding action to perform to display a buffer.
4558 It should be a cons cell (FUNCTION . ALIST), where FUNCTION is a
4559 function or a list of functions. Each function should accept 2
4560 arguments: a buffer to display and an alist similar to ALIST.
4561 See `display-buffer' for details.")
4562 (put 'display-buffer-overriding-action
'risky-local-variable t
)
4564 (defcustom display-buffer-alist nil
4565 "Alist of conditional actions for `display-buffer'.
4566 This is a list of elements (CONDITION . ACTION), where:
4568 CONDITION is either a regexp matching buffer names, or a function
4569 that takes a buffer and returns a boolean.
4571 ACTION is a cons cell (FUNCTION . ALIST), where FUNCTION is a
4572 function or a list of functions. Each such function should
4573 accept 2 arguments: a buffer to display and an alist of the
4574 same form as ALIST. See `display-buffer' for details."
4575 :type
`(alist :key-type
4576 (choice :tag
"Condition"
4578 (function :tag
"Matcher function"))
4579 :value-type
,display-buffer--action-custom-type
)
4584 (defcustom display-buffer-base-action
'(nil . nil
)
4585 "User-specified default action for `display-buffer'.
4586 It should be a cons cell (FUNCTION . ALIST), where FUNCTION is a
4587 function or a list of functions. Each function should accept 2
4588 arguments: a buffer to display and an alist similar to ALIST.
4589 See `display-buffer' for details."
4590 :type display-buffer--action-custom-type
4595 (defconst display-buffer-fallback-action
4596 '((display-buffer--maybe-same-window ;FIXME: why isn't this redundant?
4597 display-buffer-reuse-window
4598 display-buffer--maybe-pop-up-frame-or-window
4599 display-buffer-use-some-window
4600 ;; If all else fails, pop up a new frame.
4601 display-buffer-pop-up-frame
))
4602 "Default fallback action for `display-buffer'.
4603 This is the action used by `display-buffer' if no other actions
4604 specified, e.g. by the user options `display-buffer-alist' or
4605 `display-buffer-base-action'. See `display-buffer'.")
4606 (put 'display-buffer-fallback-action
'risky-local-variable t
)
4608 (defun display-buffer-assq-regexp (buffer-name alist
)
4609 "Retrieve ALIST entry corresponding to BUFFER-NAME."
4611 (dolist (entry alist
)
4612 (let ((key (car entry
))
4613 (value (cdr entry
)))
4614 (when (or (and (stringp key
)
4615 (string-match-p key buffer-name
))
4616 (and (symbolp key
) (functionp key
)
4617 (funcall key buffer-name alist
)))
4618 (throw 'match
(cdr entry
)))))))
4620 (defvar display-buffer--same-window-action
4621 '(display-buffer-same-window
4622 (inhibit-same-window . nil
))
4623 "A `display-buffer' action for displaying in the same window.")
4624 (put 'display-buffer--same-window-action
'risky-local-variable t
)
4626 (defvar display-buffer--other-frame-action
4627 '((display-buffer-reuse-window
4628 display-buffer-pop-up-frame
)
4629 (reusable-frames .
0)
4630 (inhibit-same-window . t
))
4631 "A `display-buffer' action for displaying in another frame.")
4632 (put 'display-buffer--other-frame-action
'risky-local-variable t
)
4634 (defun display-buffer (&optional buffer-or-name action frame
)
4635 "Display BUFFER-OR-NAME in some window, without selecting it.
4636 BUFFER-OR-NAME must be a buffer or the name of an existing
4637 buffer. Return the window chosen for displaying BUFFER-OR-NAME,
4638 or nil if no such window is found.
4640 Optional argument ACTION should have the form (FUNCTION . ALIST).
4641 FUNCTION is either a function or a list of functions. Each such
4642 function is called with 2 arguments: the buffer to display and an
4643 alist. It should either display the buffer and return the
4644 window, or return nil if unable to display the buffer.
4646 The `display-buffer' function builds a function list and an alist
4647 from `display-buffer-overriding-action', `display-buffer-alist',
4648 the ACTION argument, `display-buffer-base-action', and
4649 `display-buffer-fallback-action' (in that order). Then it calls
4650 each function in the combined function list in turn, passing the
4651 buffer as the first argument and the combined alist as the second
4652 argument, until one of the functions returns non-nil.
4654 Available action functions include:
4655 `display-buffer-same-window'
4656 `display-buffer-reuse-window'
4657 `display-buffer-pop-up-frame'
4658 `display-buffer-pop-up-window'
4659 `display-buffer-use-some-window'
4661 Recognized alist entries include:
4663 `inhibit-same-window' -- A non-nil value prevents the same
4664 window from being used for display.
4666 `reusable-frames' -- Value specifies frame(s) to search for a
4667 window that already displays the buffer.
4668 See `display-buffer-reuse-window'.
4670 The ACTION argument to `display-buffer' can also have a non-nil
4671 and non-list value. This means to display the buffer in a window
4672 other than the selected one, even if it is already displayed in
4673 the selected window. If called interactively with a prefix
4674 argument, ACTION is t.
4676 Optional argument FRAME, if non-nil, acts like an additional
4677 ALIST entry (reusable-frames . FRAME), specifying the frame(s) to
4678 search for a window that is already displaying the buffer. See
4679 `display-buffer-reuse-window'."
4680 (interactive (list (read-buffer "Display buffer: " (other-buffer))
4681 (if current-prefix-arg t
)))
4682 (let ((buffer (window-normalize-buffer-to-display buffer-or-name
))
4683 ;; Handle the old form of the first argument.
4684 (inhibit-same-window (and action
(not (listp action
)))))
4685 (unless (listp action
) (setq action nil
))
4686 (if display-buffer-function
4687 ;; If `display-buffer-function' is defined, let it do the job.
4688 (funcall display-buffer-function buffer inhibit-same-window
)
4689 ;; Otherwise, use the defined actions.
4691 (display-buffer-assq-regexp (buffer-name buffer
)
4692 display-buffer-alist
))
4693 (special-action (display-buffer--special-action buffer
))
4694 ;; Extra actions from the arguments to this function:
4696 (cons nil
(append (if inhibit-same-window
4697 '((inhibit-same-window . t
)))
4699 `((reusable-frames .
,frame
))))))
4700 ;; Construct action function list and action alist.
4701 (actions (list display-buffer-overriding-action
4702 user-action special-action action extra-action
4703 display-buffer-base-action
4704 display-buffer-fallback-action
))
4705 (functions (apply 'append
4708 (if (functionp x
) (list x
) x
))
4710 (alist (apply 'append
(mapcar 'cdr actions
)))
4712 (unless (buffer-live-p buffer
)
4713 (error "Invalid buffer"))
4714 (while (and functions
(not window
))
4715 (setq window
(funcall (car functions
) buffer alist
)
4716 functions
(cdr functions
)))
4719 (defun display-buffer-other-frame (buffer)
4720 "Display buffer BUFFER in another frame.
4721 This uses the function `display-buffer' as a subroutine; see
4722 its documentation for additional customization information."
4723 (interactive "BDisplay buffer in other frame: ")
4724 (display-buffer buffer display-buffer--other-frame-action t
))
4726 ;;; `display-buffer' action functions:
4728 (defun display-buffer-same-window (buffer alist
)
4729 "Display BUFFER in the selected window.
4730 This fails if ALIST has a non-nil `inhibit-same-window' entry, or
4731 if the selected window is a minibuffer window or is dedicated to
4732 another buffer; in that case, return nil. Otherwise, return the
4734 (unless (or (cdr (assq 'inhibit-same-window alist
))
4735 (window-minibuffer-p)
4736 (window-dedicated-p))
4737 (display-buffer-record-window 'reuse
(selected-window) buffer
)
4738 (window--display-buffer-2 buffer
(selected-window))))
4740 (defun display-buffer--maybe-same-window (buffer alist
)
4741 "Conditionally display BUFFER in the selected window.
4742 If `same-window-p' returns non-nil for BUFFER's name, call
4743 `display-buffer-same-window' and return its value. Otherwise,
4745 (and (same-window-p (buffer-name buffer
))
4746 (display-buffer-same-window buffer alist
)))
4748 (defun display-buffer-reuse-window (buffer alist
)
4749 "Return a window that is already displaying BUFFER.
4750 Return nil if no usable window is found.
4752 If ALIST has a non-nil `inhibit-same-window' entry, the selected
4753 window is not eligible for reuse.
4755 If ALIST contains a `reusable-frames' entry, its value determines
4756 which frames to search for a reusable window:
4757 nil -- the selected frame (actually the last non-minibuffer frame)
4758 A frame -- just that frame
4759 `visible' -- all visible frames
4760 0 -- all frames on the current terminal
4763 If ALIST contains no `reusable-frames' entry, search just the
4764 selected frame if `display-buffer-reuse-frames' and
4765 `pop-up-frames' are both nil; search all frames on the current
4766 terminal if either of those variables is non-nil."
4767 (let* ((alist-entry (assq 'reusable-frames alist
))
4768 (frames (cond (alist-entry (cdr alist-entry
))
4769 ((if (eq pop-up-frames
'graphic-only
)
4773 (display-buffer-reuse-frames 0)
4774 (t (last-nonminibuffer-frame))))
4775 (window (if (and (eq buffer
(window-buffer))
4776 (not (cdr (assq 'inhibit-same-window alist
))))
4778 (car (delq (selected-window)
4779 (get-buffer-window-list buffer
'nomini
4782 (display-buffer-record-window 'reuse window buffer
)
4783 (window--display-buffer-1 window
))))
4785 (defun display-buffer--special-action (buffer)
4786 "Try to display BUFFER using `special-display-function'.
4787 Call `special-display-p' on BUFFER's name, and if that returns
4788 non-nil, call `special-display-function' on BUFFER."
4789 (and special-display-function
4790 ;; `special-display-p' returns either t or a list of frame
4791 ;; parameters to pass to `special-display-function'.
4792 (let ((pars (special-display-p (buffer-name buffer
))))
4794 (list (list #'display-buffer-reuse-window
4795 `(lambda (buffer _alist
)
4796 (funcall special-display-function
4797 buffer
',(if (listp pars
) pars
)))))))))
4799 (defun display-buffer-pop-up-frame (buffer alist
)
4800 "Display BUFFER in a new frame.
4801 This works by calling `pop-up-frame-function'. If successful,
4802 return the window used; otherwise return nil."
4803 (let ((fun pop-up-frame-function
)
4806 (setq frame
(funcall fun
))
4807 (setq window
(frame-selected-window frame
)))
4808 (display-buffer-record-window 'frame window buffer
)
4809 (window--display-buffer-2 buffer window display-buffer-mark-dedicated
)
4810 ;; Reset list of WINDOW's previous buffers to nil.
4811 (set-window-prev-buffers window nil
)
4814 (defun display-buffer-pop-up-window (buffer alist
)
4815 "Display BUFFER by popping up a new window.
4816 The new window is created on the selected frame, or in
4817 `last-nonminibuffer-frame' if no windows can be created there.
4818 If sucessful, return the new window; otherwise return nil."
4819 (let ((frame (or (window--frame-usable-p (selected-frame))
4820 (window--frame-usable-p (last-nonminibuffer-frame))))
4822 (when (and (or (not (frame-parameter frame
'unsplittable
))
4823 ;; If the selected frame cannot be split, look at
4824 ;; `last-nonminibuffer-frame'.
4825 (and (eq frame
(selected-frame))
4826 (setq frame
(last-nonminibuffer-frame))
4827 (window--frame-usable-p frame
)
4828 (not (frame-parameter frame
'unsplittable
))))
4829 ;; Attempt to split largest or least recently used window.
4830 (setq window
(or (window--try-to-split-window
4831 (get-largest-window frame t
))
4832 (window--try-to-split-window
4833 (get-lru-window frame t
)))))
4834 (display-buffer-record-window 'window window buffer
)
4835 (window--display-buffer-2 buffer window display-buffer-mark-dedicated
)
4836 ;; Reset list of WINDOW's previous buffers to nil.
4837 (set-window-prev-buffers window nil
)
4840 (defun display-buffer--maybe-pop-up-frame-or-window (buffer alist
)
4841 "Try displaying BUFFER based on `pop-up-frames' or `pop-up-windows'.
4843 If `pop-up-frames' is non-nil (and not `graphic-only' on a
4844 text-only terminal), try with `display-buffer-pop-up-frame'.
4846 If that cannot be done, and `pop-up-windows' is non-nil, try
4847 again with `display-buffer-pop-up-window'."
4848 (or (and (if (eq pop-up-frames
'graphic-only
)
4851 (display-buffer-pop-up-frame buffer alist
))
4853 (display-buffer-pop-up-window buffer alist
))))
4855 (defun display-buffer-use-some-window (buffer alist
)
4856 "Display BUFFER in an existing window.
4857 Search for a usable window, set that window to the buffer, and
4858 return the window. If no suitable window is found, return nil."
4859 (let* ((not-this-window (cdr (assq 'inhibit-same-window alist
)))
4860 (window-to-undedicate
4861 ;; When NOT-THIS-WINDOW is non-nil, temporarily dedicate the
4862 ;; selected window to its buffer, to prevent any of the
4863 ;; `get-' routines below from choosing it. (Bug#1415)
4864 (and not-this-window
(not (window-dedicated-p))
4865 (set-window-dedicated-p (selected-window) t
)
4867 (frame (or (window--frame-usable-p (selected-frame))
4868 (window--frame-usable-p (last-nonminibuffer-frame))))
4872 ;; Reuse an existing window.
4873 (or (get-lru-window frame
)
4874 (let ((window (get-buffer-window buffer
'visible
)))
4875 (unless (and not-this-window
4876 (eq window
(selected-window)))
4878 (get-largest-window 'visible
)
4879 (let ((window (get-buffer-window buffer
0)))
4880 (unless (and not-this-window
4881 (eq window
(selected-window)))
4883 (get-largest-window 0)))
4884 (when (window-live-p window-to-undedicate
)
4885 ;; Restore dedicated status of selected window.
4886 (set-window-dedicated-p window-to-undedicate nil
)))
4888 (display-buffer-record-window 'reuse window buffer
)
4889 (window--even-window-heights window
)
4890 (window--display-buffer-2 buffer window
))))
4892 ;;; Display + selection commands:
4894 (defun pop-to-buffer (buffer &optional action norecord
)
4895 "Select buffer BUFFER in some window, preferably a different one.
4896 BUFFER may be a buffer, a string (a buffer name), or nil. If it
4897 is a string not naming an existent buffer, create a buffer with
4898 that name. If BUFFER is nil, choose some other buffer. Return
4901 This uses `display-buffer' as a subroutine. The optional ACTION
4902 argument is passed to `display-buffer' as its ACTION argument.
4903 See `display-buffer' for more information. ACTION is t if called
4904 interactively with a prefix argument, which means to pop to a
4905 window other than the selected one even if the buffer is already
4906 displayed in the selected window.
4908 If the window to show BUFFER is not on the selected
4909 frame, raise that window's frame and give it input focus.
4911 Optional third arg NORECORD non-nil means do not put this buffer
4912 at the front of the list of recently selected ones."
4913 (interactive (list (read-buffer "Pop to buffer: " (other-buffer))
4914 (if current-prefix-arg t
)))
4915 (setq buffer
(window-normalize-buffer-to-switch-to buffer
))
4917 (let* ((old-window (selected-window))
4918 (old-frame (selected-frame))
4919 (window (display-buffer buffer action
))
4920 (frame (window-frame window
)))
4921 ;; If we chose another frame, make sure it gets input focus.
4922 (unless (eq frame old-frame
)
4923 (select-frame-set-input-focus frame norecord
))
4924 ;; Make sure new window is selected (Bug#8615), (Bug#6954).
4925 (select-window window norecord
)
4928 (defun pop-to-buffer-same-window (buffer &optional norecord
)
4929 "Select buffer BUFFER in some window, preferably the same one.
4930 This function behaves much like `switch-to-buffer', except it
4931 displays with `special-display-function' if BUFFER has a match in
4932 `special-display-buffer-names' or `special-display-regexps'.
4934 Unlike `pop-to-buffer', this function prefers using the selected
4935 window over popping up a new window or frame.
4937 BUFFER may be a buffer, a string (a buffer name), or nil. If it
4938 is a string not naming an existent buffer, create a buffer with
4939 that name. If BUFFER is nil, choose some other buffer. Return
4942 NORECORD, if non-nil means do not put this buffer at the front of
4943 the list of recently selected ones."
4944 (pop-to-buffer buffer
4945 '(display-buffer-same-window
4946 (inhibit-same-window . nil
))
4949 (defun read-buffer-to-switch (prompt)
4950 "Read the name of a buffer to switch to, prompting with PROMPT.
4951 Return the neame of the buffer as a string.
4953 This function is intended for the `switch-to-buffer' family of
4954 commands since these need to omit the name of the current buffer
4955 from the list of completions and default values."
4956 (let ((rbts-completion-table (internal-complete-buffer-except)))
4957 (minibuffer-with-setup-hook
4959 (setq minibuffer-completion-table rbts-completion-table
)
4960 ;; Since rbts-completion-table is built dynamically, we
4961 ;; can't just add it to the default value of
4962 ;; icomplete-with-completion-tables, so we add it
4964 (if (and (boundp 'icomplete-with-completion-tables
)
4965 (listp icomplete-with-completion-tables
))
4966 (set (make-local-variable 'icomplete-with-completion-tables
)
4967 (cons rbts-completion-table
4968 icomplete-with-completion-tables
))))
4969 (read-buffer prompt
(other-buffer (current-buffer))
4970 (confirm-nonexistent-file-or-buffer)))))
4972 (defun window-normalize-buffer-to-switch-to (buffer-or-name)
4973 "Normalize BUFFER-OR-NAME argument of buffer switching functions.
4974 If BUFFER-OR-NAME is nil, return the buffer returned by
4975 `other-buffer'. Else, if a buffer specified by BUFFER-OR-NAME
4976 exists, return that buffer. If no such buffer exists, create a
4977 buffer with the name BUFFER-OR-NAME and return that buffer."
4979 (or (get-buffer buffer-or-name
)
4980 (let ((buffer (get-buffer-create buffer-or-name
)))
4981 (set-buffer-major-mode buffer
)
4985 (defun switch-to-buffer (buffer-or-name &optional norecord force-same-window
)
4986 "Switch to buffer BUFFER-OR-NAME in the selected window.
4987 If called interactively, prompt for the buffer name using the
4988 minibuffer. The variable `confirm-nonexistent-file-or-buffer'
4989 determines whether to request confirmation before creating a new
4992 BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or
4993 nil. If BUFFER-OR-NAME is a string that does not identify an
4994 existing buffer, create a buffer with that name. If
4995 BUFFER-OR-NAME is nil, switch to the buffer returned by
4998 Optional argument NORECORD non-nil means do not put the buffer
4999 specified by BUFFER-OR-NAME at the front of the buffer list and
5000 do not make the window displaying it the most recently selected
5003 If FORCE-SAME-WINDOW is non-nil, BUFFER-OR-NAME must be displayed
5004 in the selected window; signal an error if that is
5005 impossible (e.g. if the selected window is minibuffer-only). If
5006 nil, BUFFER-OR-NAME may be displayed in another window.
5008 Return the buffer switched to."
5010 (list (read-buffer-to-switch "Switch to buffer: ") nil
'force-same-window
))
5011 (let ((buffer (window-normalize-buffer-to-switch-to buffer-or-name
)))
5012 (if (null force-same-window
)
5013 (pop-to-buffer buffer display-buffer--same-window-action norecord
)
5015 ;; Don't call set-window-buffer if it's not needed since it
5016 ;; might signal an error (e.g. if the window is dedicated).
5017 ((eq buffer
(window-buffer)))
5018 ((window-minibuffer-p)
5019 (error "Cannot switch buffers in minibuffer window"))
5020 ((eq (window-dedicated-p) t
)
5021 (error "Cannot switch buffers in a dedicated window"))
5022 (t (set-window-buffer nil buffer
)))
5025 (select-window (selected-window)))
5026 (set-buffer buffer
))))
5028 (defun switch-to-buffer-other-window (buffer-or-name &optional norecord
)
5029 "Select the buffer specified by BUFFER-OR-NAME in another window.
5030 BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or
5031 nil. Return the buffer switched to.
5033 If called interactively, prompt for the buffer name using the
5034 minibuffer. The variable `confirm-nonexistent-file-or-buffer'
5035 determines whether to request confirmation before creating a new
5038 If BUFFER-OR-NAME is a string and does not identify an existing
5039 buffer, create a new buffer with that name. If BUFFER-OR-NAME is
5040 nil, switch to the buffer returned by `other-buffer'.
5042 Optional second argument NORECORD non-nil means do not put this
5043 buffer at the front of the list of recently selected ones.
5045 This uses the function `display-buffer' as a subroutine; see its
5046 documentation for additional customization information."
5048 (list (read-buffer-to-switch "Switch to buffer in other window: ")))
5049 (let ((pop-up-windows t
))
5050 (pop-to-buffer buffer-or-name t norecord
)))
5052 (defun switch-to-buffer-other-frame (buffer-or-name &optional norecord
)
5053 "Switch to buffer BUFFER-OR-NAME in another frame.
5054 BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or
5055 nil. Return the buffer switched to.
5057 If called interactively, prompt for the buffer name using the
5058 minibuffer. The variable `confirm-nonexistent-file-or-buffer'
5059 determines whether to request confirmation before creating a new
5062 If BUFFER-OR-NAME is a string and does not identify an existing
5063 buffer, create a new buffer with that name. If BUFFER-OR-NAME is
5064 nil, switch to the buffer returned by `other-buffer'.
5066 Optional second arg NORECORD non-nil means do not put this
5067 buffer at the front of the list of recently selected ones.
5069 This uses the function `display-buffer' as a subroutine; see its
5070 documentation for additional customization information."
5072 (list (read-buffer-to-switch "Switch to buffer in other frame: ")))
5073 (pop-to-buffer buffer-or-name display-buffer--other-frame-action norecord
))
5075 (defun set-window-text-height (window height
)
5076 "Set the height in lines of the text display area of WINDOW to HEIGHT.
5077 WINDOW must be a live window. HEIGHT doesn't include the mode
5078 line or header line, if any, or any partial-height lines in the
5081 Note that the current implementation of this function cannot
5082 always set the height exactly, but attempts to be conservative,
5083 by allocating more lines than are actually needed in the case
5084 where some error may be present."
5085 (setq window
(window-normalize-window window t
))
5086 (let ((delta (- height
(window-text-height window
))))
5087 (unless (zerop delta
)
5088 ;; Setting window-min-height to a value like 1 can lead to very
5089 ;; bizarre displays because it also allows Emacs to make *other*
5090 ;; windows 1-line tall, which means that there's no more space for
5092 (let ((window-min-height (min 2 height
))) ; One text line plus a modeline.
5093 (window-resize window delta
)))))
5095 (defun enlarge-window-horizontally (delta)
5096 "Make selected window DELTA columns wider.
5097 Interactively, if no argument is given, make selected window one
5100 (enlarge-window delta t
))
5102 (defun shrink-window-horizontally (delta)
5103 "Make selected window DELTA columns narrower.
5104 Interactively, if no argument is given, make selected window one
5107 (shrink-window delta t
))
5109 (defun count-screen-lines (&optional beg end count-final-newline window
)
5110 "Return the number of screen lines in the region.
5111 The number of screen lines may be different from the number of actual lines,
5112 due to line breaking, display table, etc.
5114 Optional arguments BEG and END default to `point-min' and `point-max'
5117 If region ends with a newline, ignore it unless optional third argument
5118 COUNT-FINAL-NEWLINE is non-nil.
5120 The optional fourth argument WINDOW specifies the window used for obtaining
5121 parameters such as width, horizontal scrolling, and so on. The default is
5122 to use the selected window's parameters.
5124 Like `vertical-motion', `count-screen-lines' always uses the current buffer,
5125 regardless of which buffer is displayed in WINDOW. This makes possible to use
5126 `count-screen-lines' in any buffer, whether or not it is currently displayed
5129 (setq beg
(point-min)))
5131 (setq end
(point-max)))
5137 (narrow-to-region (min beg end
)
5138 (if (and (not count-final-newline
)
5139 (= ?
\n (char-before (max beg end
))))
5142 (goto-char (point-min))
5143 (1+ (vertical-motion (buffer-size) window
))))))
5145 (defun window-buffer-height (window)
5146 "Return the height (in screen lines) of the buffer that WINDOW is displaying."
5147 (with-current-buffer (window-buffer window
)
5149 (count-screen-lines (point-min) (point-max)
5150 ;; If buffer ends with a newline, ignore it when
5151 ;; counting height unless point is after it.
5155 ;;; Resizing buffers to fit their contents exactly.
5156 (defun fit-window-to-buffer (&optional window max-height min-height override
)
5157 "Adjust height of WINDOW to display its buffer's contents exactly.
5158 WINDOW can be any live window and defaults to the selected one.
5160 Optional argument MAX-HEIGHT specifies the maximum height of
5161 WINDOW and defaults to the height of WINDOW's frame. Optional
5162 argument MIN-HEIGHT specifies the minimum height of WINDOW and
5163 defaults to `window-min-height'. Both, MAX-HEIGHT and MIN-HEIGHT
5164 are specified in lines and include the mode line and header line,
5167 Optional argument OVERRIDE non-nil means override restrictions
5168 imposed by `window-min-height' and `window-min-width' on the size
5171 Return the number of lines by which WINDOW was enlarged or
5172 shrunk. If an error occurs during resizing, return nil but don't
5175 Note that even if this function makes WINDOW large enough to show
5176 _all_ lines of its buffer you might not see the first lines when
5177 WINDOW was scrolled."
5179 ;; Do all the work in WINDOW and its buffer and restore the selected
5180 ;; window and the current buffer when we're done.
5181 (setq window
(window-normalize-window window t
))
5182 ;; Can't resize a full height or fixed-size window.
5183 (unless (or (window-size-fixed-p window
)
5184 (window-full-height-p window
))
5185 ;; `with-selected-window' should orderly restore the current buffer.
5186 (with-selected-window window
5187 ;; We are in WINDOW's buffer now.
5188 (let* (;; Adjust MIN-HEIGHT.
5191 (window-min-size window nil window
)
5192 (max (or min-height window-min-height
)
5193 window-safe-min-height
)))
5195 (window-total-size (frame-root-window window
)))
5196 ;; Adjust MAX-HEIGHT.
5198 (if (or override
(not max-height
))
5200 (min max-height max-window-height
)))
5201 ;; Make `desired-height' the height necessary to show
5202 ;; all of WINDOW's buffer, constrained by MIN-HEIGHT
5207 (+ (count-screen-lines)
5208 ;; For non-minibuffers count the mode line, if any.
5209 (if (and (not (window-minibuffer-p window
))
5213 ;; Count the header line, if any.
5214 (if header-line-format
1 0))
5218 (- desired-height
(window-total-size window
)))
5220 (if (> desired-delta
0)
5222 (window-max-delta window nil window
))
5224 (- (window-min-delta window nil window
))))))
5225 ;; This `condition-case' shouldn't be necessary, but who knows?
5228 ;; Return zero if DELTA became zero in the proces.
5230 ;; Don't try to redisplay with the cursor at the end on its
5231 ;; own line--that would force a scroll and spoil things.
5232 (when (and (eobp) (bolp) (not (bobp)))
5233 ;; It's silly to put `point' at the end of the previous
5234 ;; line and so maybe force horizontal scrolling.
5235 (set-window-point window
(line-beginning-position 0)))
5236 ;; Call `window-resize' with OVERRIDE argument equal WINDOW.
5237 (window-resize window delta nil window
)
5238 ;; Check if the last line is surely fully visible. If
5239 ;; not, enlarge the window.
5240 (let ((end (save-excursion
5241 (goto-char (point-max))
5242 (when (and (bolp) (not (bobp)))
5243 ;; Don't include final newline.
5245 (when truncate-lines
5246 ;; If line-wrapping is turned off, test the
5247 ;; beginning of the last line for
5248 ;; visibility instead of the end, as the
5249 ;; end of the line could be invisible by
5250 ;; virtue of extending past the edge of the
5254 (set-window-vscroll window
0)
5255 ;; This loop might in some rare pathological cases raise
5256 ;; an error - another reason for the `condition-case'.
5257 (while (and (< desired-height max-height
)
5258 (= desired-height
(window-total-size))
5259 (not (pos-visible-in-window-p end
)))
5260 (window-resize window
1 nil window
)
5261 (setq desired-height
(1+ desired-height
)))))
5262 (error (setq delta nil
)))
5265 (defun window-safely-shrinkable-p (&optional window
)
5266 "Return t if WINDOW can be shrunk without shrinking other windows.
5267 WINDOW defaults to the selected window."
5268 (with-selected-window (or window
(selected-window))
5269 (let ((edges (window-edges)))
5270 (or (= (nth 2 edges
) (nth 2 (window-edges (previous-window))))
5271 (= (nth 0 edges
) (nth 0 (window-edges (next-window))))))))
5273 (defun shrink-window-if-larger-than-buffer (&optional window
)
5274 "Shrink height of WINDOW if its buffer doesn't need so many lines.
5275 More precisely, shrink WINDOW vertically to be as small as
5276 possible, while still showing the full contents of its buffer.
5277 WINDOW defaults to the selected window.
5279 Do not shrink WINDOW to less than `window-min-height' lines. Do
5280 nothing if the buffer contains more lines than the present window
5281 height, or if some of the window's contents are scrolled out of
5282 view, or if shrinking this window would also shrink another
5283 window, or if the window is the only window of its frame.
5285 Return non-nil if the window was shrunk, nil otherwise."
5287 (setq window
(window-normalize-window window t
))
5288 ;; Make sure that WINDOW is vertically combined and `point-min' is
5289 ;; visible (for whatever reason that's needed). The remaining issues
5290 ;; should be taken care of by `fit-window-to-buffer'.
5291 (when (and (window-combined-p window
)
5292 (pos-visible-in-window-p (point-min) window
))
5293 (fit-window-to-buffer window
(window-total-size window
))))
5295 (defun kill-buffer-and-window ()
5296 "Kill the current buffer and delete the selected window."
5298 (let ((window-to-delete (selected-window))
5299 (buffer-to-kill (current-buffer))
5300 (delete-window-hook (lambda () (ignore-errors (delete-window)))))
5303 (add-hook 'kill-buffer-hook delete-window-hook t t
)
5304 (if (kill-buffer (current-buffer))
5305 ;; If `delete-window' failed before, we rerun it to regenerate
5306 ;; the error so it can be seen in the echo area.
5307 (when (eq (selected-window) window-to-delete
)
5309 ;; If the buffer is not dead for some reason (probably because
5310 ;; of a `quit' signal), remove the hook again.
5312 (with-current-buffer buffer-to-kill
5313 (remove-hook 'kill-buffer-hook delete-window-hook t
))))))
5316 (defvar recenter-last-op nil
5317 "Indicates the last recenter operation performed.
5318 Possible values: `top', `middle', `bottom', integer or float numbers.")
5320 (defcustom recenter-positions
'(middle top bottom
)
5321 "Cycling order for `recenter-top-bottom'.
5322 A list of elements with possible values `top', `middle', `bottom',
5323 integer or float numbers that define the cycling order for
5324 the command `recenter-top-bottom'.
5326 Top and bottom destinations are `scroll-margin' lines the from true
5327 window top and bottom. Middle redraws the frame and centers point
5328 vertically within the window. Integer number moves current line to
5329 the specified absolute window-line. Float number between 0.0 and 1.0
5330 means the percentage of the screen space from the top. The default
5331 cycling order is middle -> top -> bottom."
5332 :type
'(repeat (choice
5333 (const :tag
"Top" top
)
5334 (const :tag
"Middle" middle
)
5335 (const :tag
"Bottom" bottom
)
5336 (integer :tag
"Line number")
5337 (float :tag
"Percentage")))
5341 (defun recenter-top-bottom (&optional arg
)
5342 "Move current buffer line to the specified window line.
5343 With no prefix argument, successive calls place point according
5344 to the cycling order defined by `recenter-positions'.
5346 A prefix argument is handled like `recenter':
5347 With numeric prefix ARG, move current line to window-line ARG.
5348 With plain `C-u', move current line to window center."
5351 (arg (recenter arg
)) ; Always respect ARG.
5353 (setq recenter-last-op
5354 (if (eq this-command last-command
)
5355 (car (or (cdr (member recenter-last-op recenter-positions
))
5356 recenter-positions
))
5357 (car recenter-positions
)))
5358 (let ((this-scroll-margin
5359 (min (max 0 scroll-margin
)
5360 (truncate (/ (window-body-height) 4.0)))))
5361 (cond ((eq recenter-last-op
'middle
)
5363 ((eq recenter-last-op
'top
)
5364 (recenter this-scroll-margin
))
5365 ((eq recenter-last-op
'bottom
)
5366 (recenter (- -
1 this-scroll-margin
)))
5367 ((integerp recenter-last-op
)
5368 (recenter recenter-last-op
))
5369 ((floatp recenter-last-op
)
5370 (recenter (round (* recenter-last-op
(window-height))))))))))
5372 (define-key global-map
[?\C-l
] 'recenter-top-bottom
)
5374 (defun move-to-window-line-top-bottom (&optional arg
)
5375 "Position point relative to window.
5377 With a prefix argument ARG, acts like `move-to-window-line'.
5379 With no argument, positions point at center of window.
5380 Successive calls position point at positions defined
5381 by `recenter-positions'."
5384 (arg (move-to-window-line arg
)) ; Always respect ARG.
5386 (setq recenter-last-op
5387 (if (eq this-command last-command
)
5388 (car (or (cdr (member recenter-last-op recenter-positions
))
5389 recenter-positions
))
5390 (car recenter-positions
)))
5391 (let ((this-scroll-margin
5392 (min (max 0 scroll-margin
)
5393 (truncate (/ (window-body-height) 4.0)))))
5394 (cond ((eq recenter-last-op
'middle
)
5395 (call-interactively 'move-to-window-line
))
5396 ((eq recenter-last-op
'top
)
5397 (move-to-window-line this-scroll-margin
))
5398 ((eq recenter-last-op
'bottom
)
5399 (move-to-window-line (- -
1 this-scroll-margin
)))
5400 ((integerp recenter-last-op
)
5401 (move-to-window-line recenter-last-op
))
5402 ((floatp recenter-last-op
)
5403 (move-to-window-line (round (* recenter-last-op
(window-height))))))))))
5405 (define-key global-map
[?\M-r
] 'move-to-window-line-top-bottom
)
5407 ;;; Scrolling commands.
5409 ;;; Scrolling commands which do not signal errors at top/bottom
5410 ;;; of buffer at first key-press (instead move to top/bottom
5413 (defcustom scroll-error-top-bottom nil
5414 "Move point to top/bottom of buffer before signalling a scrolling error.
5415 A value of nil means just signal an error if no more scrolling possible.
5416 A value of t means point moves to the beginning or the end of the buffer
5417 \(depending on scrolling direction) when no more scrolling possible.
5418 When point is already on that position, then signal an error."
5423 (defun scroll-up-command (&optional arg
)
5424 "Scroll text of selected window upward ARG lines; or near full screen if no ARG.
5425 If `scroll-error-top-bottom' is non-nil and `scroll-up' cannot
5426 scroll window further, move cursor to the bottom line.
5427 When point is already on that position, then signal an error.
5428 A near full screen is `next-screen-context-lines' less than a full screen.
5429 Negative ARG means scroll downward.
5430 If ARG is the atom `-', scroll downward by nearly full screen."
5433 ((null scroll-error-top-bottom
)
5436 (scroll-down-command nil
))
5437 ((< (prefix-numeric-value arg
) 0)
5438 (scroll-down-command (- (prefix-numeric-value arg
))))
5440 (scroll-up arg
)) ; signal error
5446 ;; When scrolling by ARG lines can't be done,
5447 ;; move by ARG lines instead.
5449 ;; When ARG is nil for full-screen scrolling,
5450 ;; move to the bottom of the buffer.
5451 (goto-char (point-max))))))))
5453 (put 'scroll-up-command
'scroll-command t
)
5455 (defun scroll-down-command (&optional arg
)
5456 "Scroll text of selected window down ARG lines; or near full screen if no ARG.
5457 If `scroll-error-top-bottom' is non-nil and `scroll-down' cannot
5458 scroll window further, move cursor to the top line.
5459 When point is already on that position, then signal an error.
5460 A near full screen is `next-screen-context-lines' less than a full screen.
5461 Negative ARG means scroll upward.
5462 If ARG is the atom `-', scroll upward by nearly full screen."
5465 ((null scroll-error-top-bottom
)
5468 (scroll-up-command nil
))
5469 ((< (prefix-numeric-value arg
) 0)
5470 (scroll-up-command (- (prefix-numeric-value arg
))))
5472 (scroll-down arg
)) ; signal error
5476 (beginning-of-buffer
5478 ;; When scrolling by ARG lines can't be done,
5479 ;; move by ARG lines instead.
5480 (forward-line (- arg
))
5481 ;; When ARG is nil for full-screen scrolling,
5482 ;; move to the top of the buffer.
5483 (goto-char (point-min))))))))
5485 (put 'scroll-down-command
'scroll-command t
)
5487 ;;; Scrolling commands which scroll a line instead of full screen.
5489 (defun scroll-up-line (&optional arg
)
5490 "Scroll text of selected window upward ARG lines; or one line if no ARG.
5491 If ARG is omitted or nil, scroll upward by one line.
5492 This is different from `scroll-up-command' that scrolls a full screen."
5494 (scroll-up (or arg
1)))
5496 (put 'scroll-up-line
'scroll-command t
)
5498 (defun scroll-down-line (&optional arg
)
5499 "Scroll text of selected window down ARG lines; or one line if no ARG.
5500 If ARG is omitted or nil, scroll down by one line.
5501 This is different from `scroll-down-command' that scrolls a full screen."
5503 (scroll-down (or arg
1)))
5505 (put 'scroll-down-line
'scroll-command t
)
5508 (defun scroll-other-window-down (lines)
5509 "Scroll the \"other window\" down.
5510 For more details, see the documentation for `scroll-other-window'."
5512 (scroll-other-window
5513 ;; Just invert the argument's meaning.
5514 ;; We can do that without knowing which window it will be.
5515 (if (eq lines
'-
) nil
5517 (- (prefix-numeric-value lines
))))))
5519 (defun beginning-of-buffer-other-window (arg)
5520 "Move point to the beginning of the buffer in the other window.
5521 Leave mark at previous position.
5522 With arg N, put point N/10 of the way from the true beginning."
5524 (let ((orig-window (selected-window))
5525 (window (other-window-for-scrolling)))
5526 ;; We use unwind-protect rather than save-window-excursion
5527 ;; because the latter would preserve the things we want to change.
5530 (select-window window
)
5531 ;; Set point and mark in that window's buffer.
5533 (beginning-of-buffer arg
))
5534 ;; Set point accordingly.
5536 (select-window orig-window
))))
5538 (defun end-of-buffer-other-window (arg)
5539 "Move point to the end of the buffer in the other window.
5540 Leave mark at previous position.
5541 With arg N, put point N/10 of the way from the true end."
5543 ;; See beginning-of-buffer-other-window for comments.
5544 (let ((orig-window (selected-window))
5545 (window (other-window-for-scrolling)))
5548 (select-window window
)
5550 (end-of-buffer arg
))
5552 (select-window orig-window
))))
5554 (defvar mouse-autoselect-window-timer nil
5555 "Timer used by delayed window autoselection.")
5557 (defvar mouse-autoselect-window-position nil
5558 "Last mouse position recorded by delayed window autoselection.")
5560 (defvar mouse-autoselect-window-window nil
5561 "Last window recorded by delayed window autoselection.")
5563 (defvar mouse-autoselect-window-state nil
5564 "When non-nil, special state of delayed window autoselection.
5565 Possible values are `suspend' \(suspend autoselection after a menu or
5566 scrollbar interaction\) and `select' \(the next invocation of
5567 'handle-select-window' shall select the window immediately\).")
5569 (defun mouse-autoselect-window-cancel (&optional force
)
5570 "Cancel delayed window autoselection.
5571 Optional argument FORCE means cancel unconditionally."
5572 (unless (and (not force
)
5573 ;; Don't cancel for select-window or select-frame events
5574 ;; or when the user drags a scroll bar.
5575 (or (memq this-command
5576 '(handle-select-window handle-switch-frame
))
5577 (and (eq this-command
'scroll-bar-toolkit-scroll
)
5578 (memq (nth 4 (event-end last-input-event
))
5579 '(handle end-scroll
)))))
5580 (setq mouse-autoselect-window-state nil
)
5581 (when (timerp mouse-autoselect-window-timer
)
5582 (cancel-timer mouse-autoselect-window-timer
))
5583 (remove-hook 'pre-command-hook
'mouse-autoselect-window-cancel
)))
5585 (defun mouse-autoselect-window-start (mouse-position &optional window suspend
)
5586 "Start delayed window autoselection.
5587 MOUSE-POSITION is the last position where the mouse was seen as returned
5588 by `mouse-position'. Optional argument WINDOW non-nil denotes the
5589 window where the mouse was seen. Optional argument SUSPEND non-nil
5590 means suspend autoselection."
5591 ;; Record values for MOUSE-POSITION, WINDOW, and SUSPEND.
5592 (setq mouse-autoselect-window-position mouse-position
)
5593 (when window
(setq mouse-autoselect-window-window window
))
5594 (setq mouse-autoselect-window-state
(when suspend
'suspend
))
5595 ;; Install timer which runs `mouse-autoselect-window-select' after
5596 ;; `mouse-autoselect-window' seconds.
5597 (setq mouse-autoselect-window-timer
5599 (abs mouse-autoselect-window
) nil
'mouse-autoselect-window-select
)))
5601 (defun mouse-autoselect-window-select ()
5602 "Select window with delayed window autoselection.
5603 If the mouse position has stabilized in a non-selected window, select
5604 that window. The minibuffer window is selected only if the minibuffer is
5605 active. This function is run by `mouse-autoselect-window-timer'."
5607 (let* ((mouse-position (mouse-position))
5610 (window-at (cadr mouse-position
) (cddr mouse-position
)
5611 (car mouse-position
)))))
5613 ((or (menu-or-popup-active-p)
5615 (not (coordinates-in-window-p (cdr mouse-position
) window
))))
5616 ;; A menu / popup dialog is active or the mouse is on the scroll-bar
5617 ;; of WINDOW, temporarily suspend delayed autoselection.
5618 (mouse-autoselect-window-start mouse-position nil t
))
5619 ((eq mouse-autoselect-window-state
'suspend
)
5620 ;; Delayed autoselection was temporarily suspended, reenable it.
5621 (mouse-autoselect-window-start mouse-position
))
5622 ((and window
(not (eq window
(selected-window)))
5623 (or (not (numberp mouse-autoselect-window
))
5624 (and (> mouse-autoselect-window
0)
5625 ;; If `mouse-autoselect-window' is positive, select
5626 ;; window if the window is the same as before.
5627 (eq window mouse-autoselect-window-window
))
5628 ;; Otherwise select window if the mouse is at the same
5629 ;; position as before. Observe that the first test after
5630 ;; starting autoselection usually fails since the value of
5631 ;; `mouse-autoselect-window-position' recorded there is the
5632 ;; position where the mouse has entered the new window and
5633 ;; not necessarily where the mouse has stopped moving.
5634 (equal mouse-position mouse-autoselect-window-position
))
5635 ;; The minibuffer is a candidate window if it's active.
5636 (or (not (window-minibuffer-p window
))
5637 (eq window
(active-minibuffer-window))))
5638 ;; Mouse position has stabilized in non-selected window: Cancel
5639 ;; delayed autoselection and try to select that window.
5640 (mouse-autoselect-window-cancel t
)
5641 ;; Select window where mouse appears unless the selected window is the
5642 ;; minibuffer. Use `unread-command-events' in order to execute pre-
5643 ;; and post-command hooks and trigger idle timers. To avoid delaying
5644 ;; autoselection again, set `mouse-autoselect-window-state'."
5645 (unless (window-minibuffer-p (selected-window))
5646 (setq mouse-autoselect-window-state
'select
)
5647 (setq unread-command-events
5648 (cons (list 'select-window
(list window
))
5649 unread-command-events
))))
5650 ((or (and window
(eq window
(selected-window)))
5651 (not (numberp mouse-autoselect-window
))
5652 (equal mouse-position mouse-autoselect-window-position
))
5653 ;; Mouse position has either stabilized in the selected window or at
5654 ;; `mouse-autoselect-window-position': Cancel delayed autoselection.
5655 (mouse-autoselect-window-cancel t
))
5657 ;; Mouse position has not stabilized yet, resume delayed
5659 (mouse-autoselect-window-start mouse-position window
))))))
5661 (defun handle-select-window (event)
5662 "Handle select-window events."
5664 (let ((window (posn-window (event-start event
))))
5665 (unless (or (not (window-live-p window
))
5666 ;; Don't switch if we're currently in the minibuffer.
5667 ;; This tries to work around problems where the
5668 ;; minibuffer gets unselected unexpectedly, and where
5669 ;; you then have to move your mouse all the way down to
5670 ;; the minibuffer to select it.
5671 (window-minibuffer-p (selected-window))
5672 ;; Don't switch to minibuffer window unless it's active.
5673 (and (window-minibuffer-p window
)
5674 (not (minibuffer-window-active-p window
)))
5675 ;; Don't switch when autoselection shall be delayed.
5676 (and (numberp mouse-autoselect-window
)
5677 (not (zerop mouse-autoselect-window
))
5678 (not (eq mouse-autoselect-window-state
'select
))
5680 ;; Cancel any delayed autoselection.
5681 (mouse-autoselect-window-cancel t
)
5682 ;; Start delayed autoselection from current mouse
5683 ;; position and window.
5684 (mouse-autoselect-window-start (mouse-position) window
)
5685 ;; Executing a command cancels delayed autoselection.
5687 'pre-command-hook
'mouse-autoselect-window-cancel
))))
5688 (when mouse-autoselect-window
5689 ;; Reset state of delayed autoselection.
5690 (setq mouse-autoselect-window-state nil
)
5691 ;; Run `mouse-leave-buffer-hook' when autoselecting window.
5692 (run-hooks 'mouse-leave-buffer-hook
))
5693 (select-window window
))))
5695 (defun truncated-partial-width-window-p (&optional window
)
5696 "Return non-nil if lines in WINDOW are specifically truncated due to its width.
5697 WINDOW defaults to the selected window.
5698 Return nil if WINDOW is not a partial-width window
5699 (regardless of the value of `truncate-lines').
5700 Otherwise, consult the value of `truncate-partial-width-windows'
5701 for the buffer shown in WINDOW."
5703 (setq window
(selected-window)))
5704 (unless (window-full-width-p window
)
5705 (let ((t-p-w-w (buffer-local-value 'truncate-partial-width-windows
5706 (window-buffer window
))))
5707 (if (integerp t-p-w-w
)
5708 (< (window-width window
) t-p-w-w
)
5711 ;; Some of these are in tutorial--default-keys, so update that if you
5713 (define-key ctl-x-map
"0" 'delete-window
)
5714 (define-key ctl-x-map
"1" 'delete-other-windows
)
5715 (define-key ctl-x-map
"2" 'split-window-below
)
5716 (define-key ctl-x-map
"3" 'split-window-right
)
5717 (define-key ctl-x-map
"o" 'other-window
)
5718 (define-key ctl-x-map
"^" 'enlarge-window
)
5719 (define-key ctl-x-map
"}" 'enlarge-window-horizontally
)
5720 (define-key ctl-x-map
"{" 'shrink-window-horizontally
)
5721 (define-key ctl-x-map
"-" 'shrink-window-if-larger-than-buffer
)
5722 (define-key ctl-x-map
"+" 'balance-windows
)
5723 (define-key ctl-x-4-map
"0" 'kill-buffer-and-window
)
5725 ;;; window.el ends here