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1 | ;;; window.el --- GNU Emacs window commands aside from those written in C |
2 | ||
3 | ;; Copyright (C) 1985, 1989, 1992, 1993, 1994, 2000, 2001, 2002, | |
114f9c96 | 4 | ;; 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
3689984f | 5 | ;; Free Software Foundation, Inc. |
3c448ab6 MR |
6 | |
7 | ;; Maintainer: FSF | |
8 | ;; Keywords: internal | |
bd78fa1d | 9 | ;; Package: emacs |
3c448ab6 MR |
10 | |
11 | ;; This file is part of GNU Emacs. | |
12 | ||
13 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
14 | ;; it under the terms of the GNU General Public License as published by | |
15 | ;; the Free Software Foundation, either version 3 of the License, or | |
16 | ;; (at your option) any later version. | |
17 | ||
18 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
19 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | ;; GNU General Public License for more details. | |
22 | ||
23 | ;; You should have received a copy of the GNU General Public License | |
24 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
25 | ||
26 | ;;; Commentary: | |
27 | ||
28 | ;; Window tree functions. | |
29 | ||
30 | ;;; Code: | |
31 | ||
32 | (eval-when-compile (require 'cl)) | |
33 | ||
34 | (defvar window-size-fixed nil | |
35 | "*Non-nil in a buffer means windows displaying the buffer are fixed-size. | |
36 | If the value is `height', then only the window's height is fixed. | |
37 | If the value is `width', then only the window's width is fixed. | |
38 | Any other non-nil value fixes both the width and the height. | |
39 | Emacs won't change the size of any window displaying that buffer, | |
40 | unless you explicitly change the size, or Emacs has no other choice.") | |
41 | (make-variable-buffer-local 'window-size-fixed) | |
42 | ||
43 | (defmacro save-selected-window (&rest body) | |
44 | "Execute BODY, then select the previously selected window. | |
45 | The value returned is the value of the last form in BODY. | |
46 | ||
47 | This macro saves and restores the selected window, as well as the | |
48 | selected window in each frame. If the previously selected window | |
49 | is no longer live, then whatever window is selected at the end of | |
50 | BODY remains selected. If the previously selected window of some | |
51 | frame is no longer live at the end of BODY, that frame's selected | |
52 | window is left alone. | |
53 | ||
54 | This macro saves and restores the current buffer, since otherwise | |
55 | its normal operation could make a different buffer current. The | |
56 | order of recently selected windows and the buffer list ordering | |
57 | are not altered by this macro (unless they are altered in BODY)." | |
58 | `(let ((save-selected-window-window (selected-window)) | |
59 | ;; It is necessary to save all of these, because calling | |
60 | ;; select-window changes frame-selected-window for whatever | |
61 | ;; frame that window is in. | |
62 | (save-selected-window-alist | |
63 | (mapcar (lambda (frame) (cons frame (frame-selected-window frame))) | |
64 | (frame-list)))) | |
65 | (save-current-buffer | |
66 | (unwind-protect | |
67 | (progn ,@body) | |
68 | (dolist (elt save-selected-window-alist) | |
69 | (and (frame-live-p (car elt)) | |
70 | (window-live-p (cdr elt)) | |
71 | (set-frame-selected-window (car elt) (cdr elt) 'norecord))) | |
72 | (when (window-live-p save-selected-window-window) | |
73 | (select-window save-selected-window-window 'norecord)))))) | |
74 | ||
75 | (defun window-body-height (&optional window) | |
76 | "Return number of lines in WINDOW available for actual buffer text. | |
77 | WINDOW defaults to the selected window. | |
78 | ||
79 | The return value does not include the mode line or the header | |
80 | line, if any. If a line at the bottom of the window is only | |
d1f18ec0 JB |
81 | partially visible, that line is included in the return value. |
82 | If you do not want to include a partially visible bottom line | |
83 | in the return value, use `window-text-height' instead." | |
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84 | (or window (setq window (selected-window))) |
85 | (if (window-minibuffer-p window) | |
86 | (window-height window) | |
87 | (with-current-buffer (window-buffer window) | |
88 | (max 1 (- (window-height window) | |
89 | (if mode-line-format 1 0) | |
90 | (if header-line-format 1 0)))))) | |
91 | ||
ccafbf06 | 92 | ;; See discussion in bug#4543. |
02c6f098 | 93 | (defun window-full-height-p (&optional window) |
ccafbf06 GM |
94 | "Return non-nil if WINDOW is not the result of a vertical split. |
95 | WINDOW defaults to the selected window. (This function is not | |
96 | appropriate for minibuffers.)" | |
02c6f098 GM |
97 | (unless window |
98 | (setq window (selected-window))) | |
99 | (= (window-height window) | |
100 | (window-height (frame-root-window (window-frame window))))) | |
101 | ||
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102 | (defun one-window-p (&optional nomini all-frames) |
103 | "Return non-nil if the selected window is the only window. | |
104 | Optional arg NOMINI non-nil means don't count the minibuffer | |
105 | even if it is active. Otherwise, the minibuffer is counted | |
106 | when it is active. | |
107 | ||
108 | The optional arg ALL-FRAMES t means count windows on all frames. | |
109 | If it is `visible', count windows on all visible frames. | |
110 | ALL-FRAMES nil or omitted means count only the selected frame, | |
111 | plus the minibuffer it uses (which may be on another frame). | |
112 | ALL-FRAMES 0 means count all windows in all visible or iconified frames. | |
113 | If ALL-FRAMES is anything else, count only the selected frame." | |
114 | (let ((base-window (selected-window))) | |
115 | (if (and nomini (eq base-window (minibuffer-window))) | |
116 | (setq base-window (next-window base-window))) | |
117 | (eq base-window | |
118 | (next-window base-window (if nomini 'arg) all-frames)))) | |
119 | ||
120 | (defun window-current-scroll-bars (&optional window) | |
121 | "Return the current scroll bar settings for WINDOW. | |
122 | WINDOW defaults to the selected window. | |
123 | ||
124 | The return value is a cons cell (VERTICAL . HORIZONTAL) where | |
125 | VERTICAL specifies the current location of the vertical scroll | |
126 | bars (`left', `right', or nil), and HORIZONTAL specifies the | |
127 | current location of the horizontal scroll bars (`top', `bottom', | |
128 | or nil). | |
129 | ||
130 | Unlike `window-scroll-bars', this function reports the scroll bar | |
131 | type actually used, once frame defaults and `scroll-bar-mode' are | |
132 | taken into account." | |
133 | (let ((vert (nth 2 (window-scroll-bars window))) | |
134 | (hor nil)) | |
135 | (when (or (eq vert t) (eq hor t)) | |
136 | (let ((fcsb (frame-current-scroll-bars | |
137 | (window-frame (or window (selected-window)))))) | |
138 | (if (eq vert t) | |
139 | (setq vert (car fcsb))) | |
140 | (if (eq hor t) | |
141 | (setq hor (cdr fcsb))))) | |
142 | (cons vert hor))) | |
143 | ||
144 | (defun walk-windows (proc &optional minibuf all-frames) | |
145 | "Cycle through all windows, calling PROC for each one. | |
146 | PROC must specify a function with a window as its sole argument. | |
147 | The optional arguments MINIBUF and ALL-FRAMES specify the set of | |
148 | windows to include in the walk, see also `next-window'. | |
149 | ||
150 | MINIBUF t means include the minibuffer window even if the | |
151 | minibuffer is not active. MINIBUF nil or omitted means include | |
152 | the minibuffer window only if the minibuffer is active. Any | |
153 | other value means do not include the minibuffer window even if | |
154 | the minibuffer is active. | |
155 | ||
156 | Several frames may share a single minibuffer; if the minibuffer | |
157 | is active, all windows on all frames that share that minibuffer | |
158 | are included too. Therefore, if you are using a separate | |
159 | minibuffer frame and the minibuffer is active and MINIBUF says it | |
160 | counts, `walk-windows' includes the windows in the frame from | |
161 | which you entered the minibuffer, as well as the minibuffer | |
162 | window. | |
163 | ||
164 | ALL-FRAMES nil or omitted means cycle through all windows on | |
165 | WINDOW's frame, plus the minibuffer window if specified by the | |
166 | MINIBUF argument, see above. If the minibuffer counts, cycle | |
167 | through all windows on all frames that share that minibuffer | |
168 | too. | |
169 | ALL-FRAMES t means cycle through all windows on all existing | |
170 | frames. | |
171 | ALL-FRAMES `visible' means cycle through all windows on all | |
172 | visible frames. | |
173 | ALL-FRAMES 0 means cycle through all windows on all visible and | |
174 | iconified frames. | |
175 | ALL-FRAMES a frame means cycle through all windows on that frame | |
176 | only. | |
177 | Anything else means cycle through all windows on WINDOW's frame | |
178 | and no others. | |
179 | ||
180 | This function changes neither the order of recently selected | |
181 | windows nor the buffer list." | |
182 | ;; If we start from the minibuffer window, don't fail to come | |
183 | ;; back to it. | |
184 | (when (window-minibuffer-p (selected-window)) | |
185 | (setq minibuf t)) | |
186 | ;; Make sure to not mess up the order of recently selected | |
187 | ;; windows. Use `save-selected-window' and `select-window' | |
188 | ;; with second argument non-nil for this purpose. | |
189 | (save-selected-window | |
190 | (when (framep all-frames) | |
191 | (select-window (frame-first-window all-frames) 'norecord)) | |
192 | (let* (walk-windows-already-seen | |
193 | (walk-windows-current (selected-window))) | |
194 | (while (progn | |
195 | (setq walk-windows-current | |
196 | (next-window walk-windows-current minibuf all-frames)) | |
197 | (not (memq walk-windows-current walk-windows-already-seen))) | |
198 | (setq walk-windows-already-seen | |
199 | (cons walk-windows-current walk-windows-already-seen)) | |
200 | (funcall proc walk-windows-current))))) | |
201 | ||
202 | (defun get-window-with-predicate (predicate &optional minibuf | |
203 | all-frames default) | |
204 | "Return a window satisfying PREDICATE. | |
205 | More precisely, cycle through all windows using `walk-windows', | |
206 | calling the function PREDICATE on each one of them with the | |
207 | window as its sole argument. Return the first window for which | |
208 | PREDICATE returns non-nil. If no window satisfies PREDICATE, | |
209 | return DEFAULT. | |
210 | ||
211 | The optional arguments MINIBUF and ALL-FRAMES specify the set of | |
212 | windows to include. See `walk-windows' for the meaning of these | |
213 | arguments." | |
214 | (catch 'found | |
215 | (walk-windows #'(lambda (window) | |
216 | (when (funcall predicate window) | |
217 | (throw 'found window))) | |
218 | minibuf all-frames) | |
219 | default)) | |
220 | ||
221 | (defalias 'some-window 'get-window-with-predicate) | |
222 | ||
223 | ;; This should probably be written in C (i.e., without using `walk-windows'). | |
224 | (defun get-buffer-window-list (&optional buffer-or-name minibuf all-frames) | |
225 | "Return list of all windows displaying BUFFER-OR-NAME, or nil if none. | |
226 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer | |
227 | and defaults to the current buffer. | |
228 | ||
229 | The optional arguments MINIBUF and ALL-FRAMES specify the set of | |
230 | windows to consider. See `walk-windows' for the precise meaning | |
231 | of these arguments." | |
232 | (let ((buffer (cond | |
233 | ((not buffer-or-name) (current-buffer)) | |
234 | ((bufferp buffer-or-name) buffer-or-name) | |
235 | (t (get-buffer buffer-or-name)))) | |
236 | windows) | |
237 | (walk-windows (function (lambda (window) | |
238 | (if (eq (window-buffer window) buffer) | |
239 | (setq windows (cons window windows))))) | |
240 | minibuf all-frames) | |
241 | windows)) | |
242 | ||
243 | (defun minibuffer-window-active-p (window) | |
244 | "Return t if WINDOW is the currently active minibuffer window." | |
245 | (eq window (active-minibuffer-window))) | |
246 | \f | |
247 | (defun count-windows (&optional minibuf) | |
248 | "Return the number of visible windows. | |
249 | The optional argument MINIBUF specifies whether the minibuffer | |
250 | window shall be counted. See `walk-windows' for the precise | |
251 | meaning of this argument." | |
252 | (let ((count 0)) | |
253 | (walk-windows (lambda (w) (setq count (+ count 1))) | |
254 | minibuf) | |
255 | count)) | |
256 | \f | |
257 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
258 | ;;; `balance-windows' subroutines using `window-tree' | |
259 | ||
260 | ;;; Translate from internal window tree format | |
261 | ||
262 | (defun bw-get-tree (&optional window-or-frame) | |
263 | "Get a window split tree in our format. | |
264 | ||
265 | WINDOW-OR-FRAME must be nil, a frame, or a window. If it is nil, | |
266 | then the whole window split tree for `selected-frame' is returned. | |
267 | If it is a frame, then this is used instead. If it is a window, | |
268 | then the smallest tree containing that window is returned." | |
269 | (when window-or-frame | |
270 | (unless (or (framep window-or-frame) | |
271 | (windowp window-or-frame)) | |
272 | (error "Not a frame or window: %s" window-or-frame))) | |
273 | (let ((subtree (bw-find-tree-sub window-or-frame))) | |
274 | (when subtree | |
275 | (if (integerp subtree) | |
276 | nil | |
277 | (bw-get-tree-1 subtree))))) | |
278 | ||
279 | (defun bw-get-tree-1 (split) | |
280 | (if (windowp split) | |
281 | split | |
282 | (let ((dir (car split)) | |
283 | (edges (car (cdr split))) | |
284 | (childs (cdr (cdr split)))) | |
285 | (list | |
286 | (cons 'dir (if dir 'ver 'hor)) | |
287 | (cons 'b (nth 3 edges)) | |
288 | (cons 'r (nth 2 edges)) | |
289 | (cons 't (nth 1 edges)) | |
290 | (cons 'l (nth 0 edges)) | |
291 | (cons 'childs (mapcar #'bw-get-tree-1 childs)))))) | |
292 | ||
293 | (defun bw-find-tree-sub (window-or-frame &optional get-parent) | |
294 | (let* ((window (when (windowp window-or-frame) window-or-frame)) | |
295 | (frame (when (windowp window) (window-frame window))) | |
296 | (wt (car (window-tree frame)))) | |
297 | (when (< 1 (length (window-list frame 0))) | |
298 | (if window | |
299 | (bw-find-tree-sub-1 wt window get-parent) | |
300 | wt)))) | |
301 | ||
302 | (defun bw-find-tree-sub-1 (tree win &optional get-parent) | |
303 | (unless (windowp win) (error "Not a window: %s" win)) | |
304 | (if (memq win tree) | |
305 | (if get-parent | |
306 | get-parent | |
307 | tree) | |
308 | (let ((childs (cdr (cdr tree))) | |
309 | child | |
310 | subtree) | |
311 | (while (and childs (not subtree)) | |
312 | (setq child (car childs)) | |
313 | (setq childs (cdr childs)) | |
314 | (when (and child (listp child)) | |
315 | (setq subtree (bw-find-tree-sub-1 child win get-parent)))) | |
316 | (if (integerp subtree) | |
317 | (progn | |
318 | (if (= 1 subtree) | |
319 | tree | |
320 | (1- subtree))) | |
321 | subtree | |
322 | )))) | |
323 | ||
324 | ;;; Window or object edges | |
325 | ||
326 | (defun bw-l (obj) | |
327 | "Left edge of OBJ." | |
328 | (if (windowp obj) (nth 0 (window-edges obj)) (cdr (assq 'l obj)))) | |
329 | (defun bw-t (obj) | |
330 | "Top edge of OBJ." | |
331 | (if (windowp obj) (nth 1 (window-edges obj)) (cdr (assq 't obj)))) | |
332 | (defun bw-r (obj) | |
333 | "Right edge of OBJ." | |
334 | (if (windowp obj) (nth 2 (window-edges obj)) (cdr (assq 'r obj)))) | |
335 | (defun bw-b (obj) | |
336 | "Bottom edge of OBJ." | |
337 | (if (windowp obj) (nth 3 (window-edges obj)) (cdr (assq 'b obj)))) | |
338 | ||
339 | ;;; Split directions | |
340 | ||
341 | (defun bw-dir (obj) | |
342 | "Return window split tree direction if OBJ. | |
343 | If OBJ is a window return 'both. If it is a window split tree | |
344 | then return its direction." | |
345 | (if (symbolp obj) | |
346 | obj | |
347 | (if (windowp obj) | |
348 | 'both | |
349 | (let ((dir (cdr (assq 'dir obj)))) | |
350 | (unless (memq dir '(hor ver both)) | |
351 | (error "Can't find dir in %s" obj)) | |
352 | dir)))) | |
353 | ||
354 | (defun bw-eqdir (obj1 obj2) | |
355 | "Return t if window split tree directions are equal. | |
356 | OBJ1 and OBJ2 should be either windows or window split trees in | |
357 | our format. The directions returned by `bw-dir' are compared and | |
358 | t is returned if they are `eq' or one of them is 'both." | |
359 | (let ((dir1 (bw-dir obj1)) | |
360 | (dir2 (bw-dir obj2))) | |
361 | (or (eq dir1 dir2) | |
362 | (eq dir1 'both) | |
363 | (eq dir2 'both)))) | |
364 | ||
365 | ;;; Building split tree | |
366 | ||
367 | (defun bw-refresh-edges (obj) | |
368 | "Refresh the edge information of OBJ and return OBJ." | |
369 | (unless (windowp obj) | |
370 | (let ((childs (cdr (assq 'childs obj))) | |
371 | (ol 1000) | |
372 | (ot 1000) | |
373 | (or -1) | |
374 | (ob -1)) | |
375 | (dolist (o childs) | |
376 | (when (> ol (bw-l o)) (setq ol (bw-l o))) | |
377 | (when (> ot (bw-t o)) (setq ot (bw-t o))) | |
378 | (when (< or (bw-r o)) (setq or (bw-r o))) | |
379 | (when (< ob (bw-b o)) (setq ob (bw-b o)))) | |
380 | (setq obj (delq 'l obj)) | |
381 | (setq obj (delq 't obj)) | |
382 | (setq obj (delq 'r obj)) | |
383 | (setq obj (delq 'b obj)) | |
384 | (add-to-list 'obj (cons 'l ol)) | |
385 | (add-to-list 'obj (cons 't ot)) | |
386 | (add-to-list 'obj (cons 'r or)) | |
387 | (add-to-list 'obj (cons 'b ob)) | |
388 | )) | |
389 | obj) | |
390 | ||
391 | ;;; Balance windows | |
392 | ||
393 | (defun balance-windows (&optional window-or-frame) | |
394 | "Make windows the same heights or widths in window split subtrees. | |
395 | ||
396 | When called non-interactively WINDOW-OR-FRAME may be either a | |
397 | window or a frame. It then balances the windows on the implied | |
398 | frame. If the parameter is a window only the corresponding window | |
399 | subtree is balanced." | |
400 | (interactive) | |
401 | (let ( | |
402 | (wt (bw-get-tree window-or-frame)) | |
403 | (w) | |
404 | (h) | |
405 | (tried-sizes) | |
406 | (last-sizes) | |
407 | (windows (window-list nil 0))) | |
408 | (when wt | |
409 | (while (not (member last-sizes tried-sizes)) | |
410 | (when last-sizes (setq tried-sizes (cons last-sizes tried-sizes))) | |
411 | (setq last-sizes (mapcar (lambda (w) | |
412 | (window-edges w)) | |
413 | windows)) | |
414 | (when (eq 'hor (bw-dir wt)) | |
415 | (setq w (- (bw-r wt) (bw-l wt)))) | |
416 | (when (eq 'ver (bw-dir wt)) | |
417 | (setq h (- (bw-b wt) (bw-t wt)))) | |
418 | (bw-balance-sub wt w h))))) | |
419 | ||
420 | (defun bw-adjust-window (window delta horizontal) | |
421 | "Wrapper around `adjust-window-trailing-edge' with error checking. | |
422 | Arguments WINDOW, DELTA and HORIZONTAL are passed on to that function." | |
423 | ;; `adjust-window-trailing-edge' may fail if delta is too large. | |
424 | (while (>= (abs delta) 1) | |
425 | (condition-case err | |
426 | (progn | |
427 | (adjust-window-trailing-edge window delta horizontal) | |
428 | (setq delta 0)) | |
429 | (error | |
430 | ;;(message "adjust: %s" (error-message-string err)) | |
431 | (setq delta (/ delta 2)))))) | |
432 | ||
433 | (defun bw-balance-sub (wt w h) | |
434 | (setq wt (bw-refresh-edges wt)) | |
435 | (unless w (setq w (- (bw-r wt) (bw-l wt)))) | |
436 | (unless h (setq h (- (bw-b wt) (bw-t wt)))) | |
437 | (if (windowp wt) | |
438 | (progn | |
439 | (when w | |
440 | (let ((dw (- w (- (bw-r wt) (bw-l wt))))) | |
441 | (when (/= 0 dw) | |
442 | (bw-adjust-window wt dw t)))) | |
443 | (when h | |
444 | (let ((dh (- h (- (bw-b wt) (bw-t wt))))) | |
445 | (when (/= 0 dh) | |
446 | (bw-adjust-window wt dh nil))))) | |
447 | (let* ((childs (cdr (assq 'childs wt))) | |
448 | (cw (when w (/ w (if (bw-eqdir 'hor wt) (length childs) 1)))) | |
449 | (ch (when h (/ h (if (bw-eqdir 'ver wt) (length childs) 1))))) | |
450 | (dolist (c childs) | |
451 | (bw-balance-sub c cw ch))))) | |
452 | ||
453 | (defun window-fixed-size-p (&optional window direction) | |
454 | "Return t if WINDOW cannot be resized in DIRECTION. | |
455 | WINDOW defaults to the selected window. DIRECTION can be | |
456 | nil (i.e. any), `height' or `width'." | |
457 | (with-current-buffer (window-buffer window) | |
458 | (when (and (boundp 'window-size-fixed) window-size-fixed) | |
459 | (not (and direction | |
460 | (member (cons direction window-size-fixed) | |
461 | '((height . width) (width . height)))))))) | |
462 | ||
463 | ;;; A different solution to balance-windows. | |
464 | ||
465 | (defvar window-area-factor 1 | |
466 | "Factor by which the window area should be over-estimated. | |
467 | This is used by `balance-windows-area'. | |
468 | Changing this globally has no effect.") | |
469 | (make-variable-buffer-local 'window-area-factor) | |
470 | ||
471 | (defun balance-windows-area () | |
472 | "Make all visible windows the same area (approximately). | |
473 | See also `window-area-factor' to change the relative size of | |
474 | specific buffers." | |
475 | (interactive) | |
476 | (let* ((unchanged 0) (carry 0) (round 0) | |
477 | ;; Remove fixed-size windows. | |
478 | (wins (delq nil (mapcar (lambda (win) | |
479 | (if (not (window-fixed-size-p win)) win)) | |
480 | (window-list nil 'nomini)))) | |
481 | (changelog nil) | |
482 | next) | |
483 | ;; Resizing a window changes the size of surrounding windows in complex | |
484 | ;; ways, so it's difficult to balance them all. The introduction of | |
485 | ;; `adjust-window-trailing-edge' made it a bit easier, but it is still | |
486 | ;; very difficult to do. `balance-window' above takes an off-line | |
487 | ;; approach: get the whole window tree, then balance it, then try to | |
488 | ;; adjust the windows so they fit the result. | |
489 | ;; Here, instead, we take a "local optimization" approach, where we just | |
490 | ;; go through all the windows several times until nothing needs to be | |
491 | ;; changed. The main problem with this approach is that it's difficult | |
492 | ;; to make sure it terminates, so we use some heuristic to try and break | |
493 | ;; off infinite loops. | |
494 | ;; After a round without any change, we allow a second, to give a chance | |
495 | ;; to the carry to propagate a minor imbalance from the end back to | |
496 | ;; the beginning. | |
497 | (while (< unchanged 2) | |
498 | ;; (message "New round") | |
499 | (setq unchanged (1+ unchanged) round (1+ round)) | |
500 | (dolist (win wins) | |
501 | (setq next win) | |
502 | (while (progn (setq next (next-window next)) | |
503 | (window-fixed-size-p next))) | |
504 | ;; (assert (eq next (or (cadr (member win wins)) (car wins)))) | |
505 | (let* ((horiz | |
506 | (< (car (window-edges win)) (car (window-edges next)))) | |
507 | (areadiff (/ (- (* (window-height next) (window-width next) | |
508 | (buffer-local-value 'window-area-factor | |
509 | (window-buffer next))) | |
510 | (* (window-height win) (window-width win) | |
511 | (buffer-local-value 'window-area-factor | |
512 | (window-buffer win)))) | |
513 | (max (buffer-local-value 'window-area-factor | |
514 | (window-buffer win)) | |
515 | (buffer-local-value 'window-area-factor | |
516 | (window-buffer next))))) | |
517 | (edgesize (if horiz | |
518 | (+ (window-height win) (window-height next)) | |
519 | (+ (window-width win) (window-width next)))) | |
520 | (diff (/ areadiff edgesize))) | |
521 | (when (zerop diff) | |
522 | ;; Maybe diff is actually closer to 1 than to 0. | |
523 | (setq diff (/ (* 3 areadiff) (* 2 edgesize)))) | |
524 | (when (and (zerop diff) (not (zerop areadiff))) | |
525 | (setq diff (/ (+ areadiff carry) edgesize)) | |
526 | ;; Change things smoothly. | |
527 | (if (or (> diff 1) (< diff -1)) (setq diff (/ diff 2)))) | |
528 | (if (zerop diff) | |
529 | ;; Make sure negligible differences don't accumulate to | |
530 | ;; become significant. | |
531 | (setq carry (+ carry areadiff)) | |
532 | (bw-adjust-window win diff horiz) | |
533 | ;; (sit-for 0.5) | |
534 | (let ((change (cons win (window-edges win)))) | |
535 | ;; If the same change has been seen already for this window, | |
536 | ;; we're most likely in an endless loop, so don't count it as | |
537 | ;; a change. | |
538 | (unless (member change changelog) | |
539 | (push change changelog) | |
540 | (setq unchanged 0 carry 0))))))) | |
541 | ;; We've now basically balanced all the windows. | |
542 | ;; But there may be some minor off-by-one imbalance left over, | |
543 | ;; so let's do some fine tuning. | |
544 | ;; (bw-finetune wins) | |
545 | ;; (message "Done in %d rounds" round) | |
546 | )) | |
547 | ||
548 | \f | |
549 | (defcustom display-buffer-function nil | |
550 | "If non-nil, function to call to handle `display-buffer'. | |
551 | It will receive two args, the buffer and a flag which if non-nil | |
552 | means that the currently selected window is not acceptable. It | |
553 | should choose or create a window, display the specified buffer in | |
554 | it, and return the window. | |
555 | ||
556 | Commands such as `switch-to-buffer-other-window' and | |
557 | `find-file-other-window' work using this function." | |
558 | :type '(choice | |
559 | (const nil) | |
560 | (function :tag "function")) | |
561 | :group 'windows) | |
562 | ||
56f31926 MR |
563 | (defcustom special-display-buffer-names nil |
564 | "List of names of buffers that should be displayed specially. | |
565 | Displaying a buffer with `display-buffer' or `pop-to-buffer', if | |
566 | its name is in this list, displays the buffer in a way specified | |
567 | by `special-display-function'. `special-display-popup-frame' | |
568 | \(the default for `special-display-function') usually displays | |
569 | the buffer in a separate frame made with the parameters specified | |
570 | by `special-display-frame-alist'. If `special-display-function' | |
571 | has been set to some other function, that function is called with | |
572 | the buffer as first, and nil as second argument. | |
573 | ||
574 | Alternatively, an element of this list can be specified as | |
575 | \(BUFFER-NAME FRAME-PARAMETERS), where BUFFER-NAME is a buffer | |
576 | name and FRAME-PARAMETERS an alist of \(PARAMETER . VALUE) pairs. | |
577 | `special-display-popup-frame' will interpret such pairs as frame | |
578 | parameters when it creates a special frame, overriding the | |
579 | corresponding values from `special-display-frame-alist'. | |
580 | ||
581 | As a special case, if FRAME-PARAMETERS contains (same-window . t) | |
582 | `special-display-popup-frame' displays that buffer in the | |
583 | selected window. If FRAME-PARAMETERS contains (same-frame . t), | |
584 | it displays that buffer in a window on the selected frame. | |
585 | ||
586 | If `special-display-function' specifies some other function than | |
587 | `special-display-popup-frame', that function is called with the | |
588 | buffer named BUFFER-NAME as first, and FRAME-PARAMETERS as second | |
589 | argument. | |
590 | ||
591 | Finally, an element of this list can be also specified as | |
592 | \(BUFFER-NAME FUNCTION OTHER-ARGS). In that case, | |
593 | `special-display-popup-frame' will call FUNCTION with the buffer | |
594 | named BUFFER-NAME as first argument, and OTHER-ARGS as the | |
595 | second. If `special-display-function' specifies some other | |
596 | function, that function is called with the buffer named | |
597 | BUFFER-NAME as first, and the element's cdr as second argument. | |
598 | ||
599 | If this variable appears \"not to work\", because you added a | |
600 | name to it but the corresponding buffer is displayed in the | |
601 | selected window, look at the values of `same-window-buffer-names' | |
602 | and `same-window-regexps'. Those variables take precedence over | |
603 | this one. | |
604 | ||
605 | See also `special-display-regexps'." | |
606 | :type '(repeat | |
607 | (choice :tag "Buffer" | |
608 | :value "" | |
609 | (string :format "%v") | |
610 | (cons :tag "With parameters" | |
611 | :format "%v" | |
612 | :value ("" . nil) | |
613 | (string :format "%v") | |
614 | (repeat :tag "Parameters" | |
615 | (cons :format "%v" | |
616 | (symbol :tag "Parameter") | |
617 | (sexp :tag "Value")))) | |
618 | (list :tag "With function" | |
619 | :format "%v" | |
620 | :value ("" . nil) | |
621 | (string :format "%v") | |
622 | (function :tag "Function") | |
623 | (repeat :tag "Arguments" (sexp))))) | |
624 | :group 'windows | |
625 | :group 'frames) | |
626 | ||
ac549fa5 GM |
627 | ;;;###autoload |
628 | (put 'special-display-buffer-names 'risky-local-variable t) | |
629 | ||
56f31926 MR |
630 | (defcustom special-display-regexps nil |
631 | "List of regexps saying which buffers should be displayed specially. | |
632 | Displaying a buffer with `display-buffer' or `pop-to-buffer', if | |
633 | any regexp in this list matches its name, displays it specially | |
634 | using `special-display-function'. `special-display-popup-frame' | |
635 | \(the default for `special-display-function') usually displays | |
636 | the buffer in a separate frame made with the parameters specified | |
637 | by `special-display-frame-alist'. If `special-display-function' | |
638 | has been set to some other function, that function is called with | |
639 | the buffer as first, and nil as second argument. | |
640 | ||
641 | Alternatively, an element of this list can be specified as | |
642 | \(REGEXP FRAME-PARAMETERS), where REGEXP is a regexp as above and | |
643 | FRAME-PARAMETERS an alist of (PARAMETER . VALUE) pairs. | |
644 | `special-display-popup-frame' will then interpret these pairs as | |
645 | frame parameters when creating a special frame for a buffer whose | |
646 | name matches REGEXP, overriding the corresponding values from | |
647 | `special-display-frame-alist'. | |
648 | ||
649 | As a special case, if FRAME-PARAMETERS contains (same-window . t) | |
650 | `special-display-popup-frame' displays buffers matching REGEXP in | |
651 | the selected window. \(same-frame . t) in FRAME-PARAMETERS means | |
652 | to display such buffers in a window on the selected frame. | |
653 | ||
654 | If `special-display-function' specifies some other function than | |
655 | `special-display-popup-frame', that function is called with the | |
656 | buffer whose name matched REGEXP as first, and FRAME-PARAMETERS | |
657 | as second argument. | |
658 | ||
659 | Finally, an element of this list can be also specified as | |
660 | \(REGEXP FUNCTION OTHER-ARGS). `special-display-popup-frame' | |
661 | will then call FUNCTION with the buffer whose name matched | |
662 | REGEXP as first, and OTHER-ARGS as second argument. If | |
663 | `special-display-function' specifies some other function, that | |
664 | function is called with the buffer whose name matched REGEXP | |
665 | as first, and the element's cdr as second argument. | |
666 | ||
667 | If this variable appears \"not to work\", because you added a | |
668 | name to it but the corresponding buffer is displayed in the | |
669 | selected window, look at the values of `same-window-buffer-names' | |
670 | and `same-window-regexps'. Those variables take precedence over | |
671 | this one. | |
672 | ||
673 | See also `special-display-buffer-names'." | |
674 | :type '(repeat | |
675 | (choice :tag "Buffer" | |
676 | :value "" | |
677 | (regexp :format "%v") | |
678 | (cons :tag "With parameters" | |
679 | :format "%v" | |
680 | :value ("" . nil) | |
681 | (regexp :format "%v") | |
682 | (repeat :tag "Parameters" | |
683 | (cons :format "%v" | |
684 | (symbol :tag "Parameter") | |
685 | (sexp :tag "Value")))) | |
686 | (list :tag "With function" | |
687 | :format "%v" | |
688 | :value ("" . nil) | |
689 | (regexp :format "%v") | |
690 | (function :tag "Function") | |
691 | (repeat :tag "Arguments" (sexp))))) | |
692 | :group 'windows | |
693 | :group 'frames) | |
694 | ||
3c448ab6 MR |
695 | (defun special-display-p (buffer-name) |
696 | "Return non-nil if a buffer named BUFFER-NAME gets a special frame. | |
56f31926 MR |
697 | More precisely, return t if `special-display-buffer-names' or |
698 | `special-display-regexps' contain a string entry equaling or | |
699 | matching BUFFER-NAME. If `special-display-buffer-names' or | |
700 | `special-display-regexps' contain a list entry whose car equals | |
701 | or matches BUFFER-NAME, the return value is the cdr of that | |
702 | entry." | |
98722073 MR |
703 | (let (tmp) |
704 | (cond | |
705 | ((not (stringp buffer-name))) | |
706 | ((member buffer-name special-display-buffer-names) | |
707 | t) | |
708 | ((setq tmp (assoc buffer-name special-display-buffer-names)) | |
709 | (cdr tmp)) | |
710 | ((catch 'found | |
711 | (dolist (regexp special-display-regexps) | |
712 | (cond | |
713 | ((stringp regexp) | |
714 | (when (string-match-p regexp buffer-name) | |
715 | (throw 'found t))) | |
716 | ((and (consp regexp) (stringp (car regexp)) | |
717 | (string-match-p (car regexp) buffer-name)) | |
718 | (throw 'found (cdr regexp)))))))))) | |
3c448ab6 MR |
719 | |
720 | (defcustom special-display-function 'special-display-popup-frame | |
56f31926 MR |
721 | "Function to call for displaying special buffers. |
722 | This function is called with two arguments - the buffer and, | |
723 | optionally, a list - and should return a window displaying that | |
724 | buffer. The default value usually makes a separate frame for the | |
725 | buffer using `special-display-frame-alist' to specify the frame | |
726 | parameters. See the definition of `special-display-popup-frame' | |
727 | for how to specify such a function. | |
728 | ||
729 | A buffer is special when its name is either listed in | |
3c448ab6 MR |
730 | `special-display-buffer-names' or matches a regexp in |
731 | `special-display-regexps'." | |
732 | :type 'function | |
733 | :group 'frames) | |
734 | ||
3c448ab6 MR |
735 | (defcustom same-window-buffer-names nil |
736 | "List of names of buffers that should appear in the \"same\" window. | |
737 | `display-buffer' and `pop-to-buffer' show a buffer whose name is | |
738 | on this list in the selected rather than some other window. | |
739 | ||
740 | An element of this list can be a cons cell instead of just a | |
56f31926 MR |
741 | string. In that case, the cell's car must be a string specifying |
742 | the buffer name. This is for compatibility with | |
3c448ab6 MR |
743 | `special-display-buffer-names'; the cdr of the cons cell is |
744 | ignored. | |
745 | ||
746 | See also `same-window-regexps'." | |
747 | :type '(repeat (string :format "%v")) | |
748 | :group 'windows) | |
749 | ||
750 | (defcustom same-window-regexps nil | |
751 | "List of regexps saying which buffers should appear in the \"same\" window. | |
752 | `display-buffer' and `pop-to-buffer' show a buffer whose name | |
753 | matches a regexp on this list in the selected rather than some | |
754 | other window. | |
755 | ||
756 | An element of this list can be a cons cell instead of just a | |
56f31926 | 757 | string. In that case, the cell's car must be a regexp matching |
3c448ab6 | 758 | the buffer name. This is for compatibility with |
56f31926 | 759 | `special-display-regexps'; the cdr of the cons cell is ignored. |
3c448ab6 MR |
760 | |
761 | See also `same-window-buffer-names'." | |
762 | :type '(repeat (regexp :format "%v")) | |
763 | :group 'windows) | |
764 | ||
56f31926 MR |
765 | (defun same-window-p (buffer-name) |
766 | "Return non-nil if a buffer named BUFFER-NAME would be shown in the \"same\" window. | |
767 | This function returns non-nil if `display-buffer' or | |
768 | `pop-to-buffer' would show a buffer named BUFFER-NAME in the | |
769 | selected rather than \(as usual\) some other window. See | |
770 | `same-window-buffer-names' and `same-window-regexps'." | |
771 | (cond | |
772 | ((not (stringp buffer-name))) | |
773 | ;; The elements of `same-window-buffer-names' can be buffer | |
774 | ;; names or cons cells whose cars are buffer names. | |
775 | ((member buffer-name same-window-buffer-names)) | |
776 | ((assoc buffer-name same-window-buffer-names)) | |
777 | ((catch 'found | |
778 | (dolist (regexp same-window-regexps) | |
779 | ;; The elements of `same-window-regexps' can be regexps | |
780 | ;; or cons cells whose cars are regexps. | |
781 | (when (or (and (stringp regexp) | |
782 | (string-match regexp buffer-name)) | |
783 | (and (consp regexp) (stringp (car regexp)) | |
784 | (string-match-p (car regexp) buffer-name))) | |
785 | (throw 'found t))))))) | |
786 | ||
3c448ab6 MR |
787 | (defcustom pop-up-frames nil |
788 | "Whether `display-buffer' should make a separate frame. | |
d1f18ec0 | 789 | If nil, never make a separate frame. |
3c448ab6 MR |
790 | If the value is `graphic-only', make a separate frame |
791 | on graphic displays only. | |
792 | Any other non-nil value means always make a separate frame." | |
793 | :type '(choice | |
794 | (const :tag "Never" nil) | |
795 | (const :tag "On graphic displays only" graphic-only) | |
796 | (const :tag "Always" t)) | |
797 | :group 'windows) | |
798 | ||
799 | (defcustom display-buffer-reuse-frames nil | |
800 | "Non-nil means `display-buffer' should reuse frames. | |
801 | If the buffer in question is already displayed in a frame, raise | |
802 | that frame." | |
803 | :type 'boolean | |
804 | :version "21.1" | |
805 | :group 'windows) | |
806 | ||
807 | (defcustom pop-up-windows t | |
808 | "Non-nil means `display-buffer' should make a new window." | |
809 | :type 'boolean | |
810 | :group 'windows) | |
811 | ||
8b10a2d1 MR |
812 | (defcustom split-window-preferred-function 'split-window-sensibly |
813 | "Function called by `display-buffer' routines to split a window. | |
814 | This function is called with a window as single argument and is | |
815 | supposed to split that window and return the new window. If the | |
816 | window can (or shall) not be split, it is supposed to return nil. | |
817 | The default is to call the function `split-window-sensibly' which | |
818 | tries to split the window in a way which seems most suitable. | |
819 | You can customize the options `split-height-threshold' and/or | |
820 | `split-width-threshold' in order to have `split-window-sensibly' | |
821 | prefer either vertical or horizontal splitting. | |
822 | ||
823 | If you set this to any other function, bear in mind that the | |
824 | `display-buffer' routines may call this function two times. The | |
825 | argument of the first call is the largest window on its frame. | |
826 | If that call fails to return a live window, the function is | |
827 | called again with the least recently used window as argument. If | |
828 | that call fails too, `display-buffer' will use an existing window | |
829 | to display its buffer. | |
830 | ||
831 | The window selected at the time `display-buffer' was invoked is | |
832 | still selected when this function is called. Hence you can | |
833 | compare the window argument with the value of `selected-window' | |
834 | if you intend to split the selected window instead or if you do | |
835 | not want to split the selected window." | |
836 | :type 'function | |
3c448ab6 MR |
837 | :version "23.1" |
838 | :group 'windows) | |
839 | ||
8b10a2d1 MR |
840 | (defcustom split-height-threshold 80 |
841 | "Minimum height for splitting windows sensibly. | |
842 | If this is an integer, `split-window-sensibly' may split a window | |
843 | vertically only if it has at least this many lines. If this is | |
844 | nil, `split-window-sensibly' is not allowed to split a window | |
845 | vertically. If, however, a window is the only window on its | |
846 | frame, `split-window-sensibly' may split it vertically | |
847 | disregarding the value of this variable." | |
848 | :type '(choice (const nil) (integer :tag "lines")) | |
3c448ab6 MR |
849 | :version "23.1" |
850 | :group 'windows) | |
851 | ||
8b10a2d1 MR |
852 | (defcustom split-width-threshold 160 |
853 | "Minimum width for splitting windows sensibly. | |
854 | If this is an integer, `split-window-sensibly' may split a window | |
855 | horizontally only if it has at least this many columns. If this | |
856 | is nil, `split-window-sensibly' is not allowed to split a window | |
857 | horizontally." | |
858 | :type '(choice (const nil) (integer :tag "columns")) | |
3c448ab6 MR |
859 | :version "23.1" |
860 | :group 'windows) | |
861 | ||
8b10a2d1 MR |
862 | (defun window-splittable-p (window &optional horizontal) |
863 | "Return non-nil if `split-window-sensibly' may split WINDOW. | |
864 | Optional argument HORIZONTAL nil or omitted means check whether | |
865 | `split-window-sensibly' may split WINDOW vertically. HORIZONTAL | |
866 | non-nil means check whether WINDOW may be split horizontally. | |
3c448ab6 | 867 | |
8b10a2d1 | 868 | WINDOW may be split vertically when the following conditions |
3c448ab6 | 869 | hold: |
3c448ab6 MR |
870 | - `window-size-fixed' is either nil or equals `width' for the |
871 | buffer of WINDOW. | |
8b10a2d1 | 872 | - `split-height-threshold' is an integer and WINDOW is at least as |
3c448ab6 | 873 | high as `split-height-threshold'. |
3c448ab6 MR |
874 | - When WINDOW is split evenly, the emanating windows are at least |
875 | `window-min-height' lines tall and can accommodate at least one | |
876 | line plus - if WINDOW has one - a mode line. | |
877 | ||
8b10a2d1 | 878 | WINDOW may be split horizontally when the following conditions |
3c448ab6 | 879 | hold: |
3c448ab6 MR |
880 | - `window-size-fixed' is either nil or equals `height' for the |
881 | buffer of WINDOW. | |
8b10a2d1 | 882 | - `split-width-threshold' is an integer and WINDOW is at least as |
3c448ab6 | 883 | wide as `split-width-threshold'. |
3c448ab6 MR |
884 | - When WINDOW is split evenly, the emanating windows are at least |
885 | `window-min-width' or two (whichever is larger) columns wide." | |
886 | (when (window-live-p window) | |
887 | (with-current-buffer (window-buffer window) | |
888 | (if horizontal | |
889 | ;; A window can be split horizontally when its width is not | |
890 | ;; fixed, it is at least `split-width-threshold' columns wide | |
891 | ;; and at least twice as wide as `window-min-width' and 2 (the | |
892 | ;; latter value is hardcoded). | |
893 | (and (memq window-size-fixed '(nil height)) | |
894 | ;; Testing `window-full-width-p' here hardly makes any | |
895 | ;; sense nowadays. This can be done more intuitively by | |
896 | ;; setting up `split-width-threshold' appropriately. | |
897 | (numberp split-width-threshold) | |
898 | (>= (window-width window) | |
899 | (max split-width-threshold | |
900 | (* 2 (max window-min-width 2))))) | |
901 | ;; A window can be split vertically when its height is not | |
902 | ;; fixed, it is at least `split-height-threshold' lines high, | |
903 | ;; and it is at least twice as high as `window-min-height' and 2 | |
904 | ;; if it has a modeline or 1. | |
905 | (and (memq window-size-fixed '(nil width)) | |
906 | (numberp split-height-threshold) | |
907 | (>= (window-height window) | |
908 | (max split-height-threshold | |
909 | (* 2 (max window-min-height | |
910 | (if mode-line-format 2 1)))))))))) | |
911 | ||
8b10a2d1 MR |
912 | (defun split-window-sensibly (window) |
913 | "Split WINDOW in a way suitable for `display-buffer'. | |
914 | If `split-height-threshold' specifies an integer, WINDOW is at | |
915 | least `split-height-threshold' lines tall and can be split | |
916 | vertically, split WINDOW into two windows one above the other and | |
917 | return the lower window. Otherwise, if `split-width-threshold' | |
918 | specifies an integer, WINDOW is at least `split-width-threshold' | |
919 | columns wide and can be split horizontally, split WINDOW into two | |
920 | windows side by side and return the window on the right. If this | |
921 | can't be done either and WINDOW is the only window on its frame, | |
922 | try to split WINDOW vertically disregarding any value specified | |
923 | by `split-height-threshold'. If that succeeds, return the lower | |
924 | window. Return nil otherwise. | |
925 | ||
926 | By default `display-buffer' routines call this function to split | |
927 | the largest or least recently used window. To change the default | |
928 | customize the option `split-window-preferred-function'. | |
929 | ||
930 | You can enforce this function to not split WINDOW horizontally, | |
931 | by setting \(or binding) the variable `split-width-threshold' to | |
932 | nil. If, in addition, you set `split-height-threshold' to zero, | |
933 | chances increase that this function does split WINDOW vertically. | |
934 | ||
935 | In order to not split WINDOW vertically, set \(or bind) the | |
936 | variable `split-height-threshold' to nil. Additionally, you can | |
937 | set `split-width-threshold' to zero to make a horizontal split | |
938 | more likely to occur. | |
939 | ||
940 | Have a look at the function `window-splittable-p' if you want to | |
941 | know how `split-window-sensibly' determines whether WINDOW can be | |
942 | split." | |
943 | (or (and (window-splittable-p window) | |
944 | ;; Split window vertically. | |
945 | (with-selected-window window | |
946 | (split-window-vertically))) | |
947 | (and (window-splittable-p window t) | |
948 | ;; Split window horizontally. | |
949 | (with-selected-window window | |
950 | (split-window-horizontally))) | |
951 | (and (eq window (frame-root-window (window-frame window))) | |
952 | (not (window-minibuffer-p window)) | |
953 | ;; If WINDOW is the only window on its frame and is not the | |
954 | ;; minibuffer window, try to split it vertically disregarding | |
955 | ;; the value of `split-height-threshold'. | |
956 | (let ((split-height-threshold 0)) | |
957 | (when (window-splittable-p window) | |
958 | (with-selected-window window | |
959 | (split-window-vertically))))))) | |
960 | ||
3c448ab6 | 961 | (defun window--try-to-split-window (window) |
8b10a2d1 MR |
962 | "Try to split WINDOW. |
963 | Return value returned by `split-window-preferred-function' if it | |
964 | represents a live window, nil otherwise." | |
965 | (and (window-live-p window) | |
966 | (not (frame-parameter (window-frame window) 'unsplittable)) | |
967 | (let ((new-window | |
968 | ;; Since `split-window-preferred-function' might | |
969 | ;; throw an error use `condition-case'. | |
970 | (condition-case nil | |
971 | (funcall split-window-preferred-function window) | |
972 | (error nil)))) | |
973 | (and (window-live-p new-window) new-window)))) | |
3c448ab6 MR |
974 | |
975 | (defun window--frame-usable-p (frame) | |
976 | "Return FRAME if it can be used to display a buffer." | |
977 | (when (frame-live-p frame) | |
978 | (let ((window (frame-root-window frame))) | |
979 | ;; `frame-root-window' may be an internal window which is considered | |
980 | ;; "dead" by `window-live-p'. Hence if `window' is not live we | |
981 | ;; implicitly know that `frame' has a visible window we can use. | |
4afba819 SM |
982 | (unless (and (window-live-p window) |
983 | (or (window-minibuffer-p window) | |
984 | ;; If the window is soft-dedicated, the frame is usable. | |
064e57de SM |
985 | ;; Actually, even if the window is really dedicated, |
986 | ;; the frame is still usable by splitting it. | |
987 | ;; At least Emacs-22 allowed it, and it is desirable | |
988 | ;; when displaying same-frame windows. | |
989 | nil ; (eq t (window-dedicated-p window)) | |
990 | )) | |
3c448ab6 MR |
991 | frame)))) |
992 | ||
993 | (defcustom even-window-heights t | |
994 | "If non-nil `display-buffer' will try to even window heights. | |
995 | Otherwise `display-buffer' will leave the window configuration | |
996 | alone. Heights are evened only when `display-buffer' chooses a | |
997 | window that appears above or below the selected window." | |
998 | :type 'boolean | |
999 | :group 'windows) | |
1000 | ||
1001 | (defun window--even-window-heights (window) | |
1002 | "Even heights of WINDOW and selected window. | |
1003 | Do this only if these windows are vertically adjacent to each | |
1004 | other, `even-window-heights' is non-nil, and the selected window | |
1005 | is higher than WINDOW." | |
1006 | (when (and even-window-heights | |
1007 | (not (eq window (selected-window))) | |
1008 | ;; Don't resize minibuffer windows. | |
1009 | (not (window-minibuffer-p (selected-window))) | |
d1f18ec0 | 1010 | (> (window-height (selected-window)) (window-height window)) |
3c448ab6 MR |
1011 | (eq (window-frame window) (window-frame (selected-window))) |
1012 | (let ((sel-edges (window-edges (selected-window))) | |
1013 | (win-edges (window-edges window))) | |
1014 | (and (= (nth 0 sel-edges) (nth 0 win-edges)) | |
1015 | (= (nth 2 sel-edges) (nth 2 win-edges)) | |
1016 | (or (= (nth 1 sel-edges) (nth 3 win-edges)) | |
1017 | (= (nth 3 sel-edges) (nth 1 win-edges)))))) | |
1018 | (let ((window-min-height 1)) | |
1019 | ;; Don't throw an error if we can't even window heights for | |
1020 | ;; whatever reason. | |
1021 | (condition-case nil | |
1022 | (enlarge-window (/ (- (window-height window) (window-height)) 2)) | |
1023 | (error nil))))) | |
1024 | ||
1025 | (defun window--display-buffer-1 (window) | |
1026 | "Raise the frame containing WINDOW. | |
1027 | Do not raise the selected frame. Return WINDOW." | |
1028 | (let* ((frame (window-frame window)) | |
1029 | (visible (frame-visible-p frame))) | |
1030 | (unless (or (not visible) | |
1031 | ;; Assume the selected frame is already visible enough. | |
1032 | (eq frame (selected-frame)) | |
1033 | ;; Assume the frame from which we invoked the minibuffer | |
1034 | ;; is visible. | |
1035 | (and (minibuffer-window-active-p (selected-window)) | |
1036 | (eq frame (window-frame (minibuffer-selected-window))))) | |
1037 | (raise-frame frame)) | |
1038 | window)) | |
1039 | ||
04ae543a | 1040 | (defun window--display-buffer-2 (buffer window &optional dedicated) |
3c448ab6 | 1041 | "Display BUFFER in WINDOW and make its frame visible. |
04ae543a | 1042 | Set `window-dedicated-p' to DEDICATED if non-nil. |
3c448ab6 MR |
1043 | Return WINDOW." |
1044 | (when (and (buffer-live-p buffer) (window-live-p window)) | |
1045 | (set-window-buffer window buffer) | |
04ae543a | 1046 | (when dedicated |
782d6e30 | 1047 | (set-window-dedicated-p window dedicated)) |
3c448ab6 MR |
1048 | (window--display-buffer-1 window))) |
1049 | ||
d2c9fc42 SM |
1050 | (defvar display-buffer-mark-dedicated nil |
1051 | "If non-nil, `display-buffer' marks the windows it creates as dedicated. | |
1052 | The actual non-nil value of this variable will be copied to the | |
1053 | `window-dedicated-p' flag.") | |
1054 | ||
3c448ab6 MR |
1055 | (defun display-buffer (buffer-or-name &optional not-this-window frame) |
1056 | "Make buffer BUFFER-OR-NAME appear in some window but don't select it. | |
1057 | BUFFER-OR-NAME must be a buffer or the name of an existing | |
1058 | buffer. Return the window chosen to display BUFFER-OR-NAME or | |
1059 | nil if no such window is found. | |
1060 | ||
1061 | Optional argument NOT-THIS-WINDOW non-nil means display the | |
1062 | buffer in a window other than the selected one, even if it is | |
1063 | already displayed in the selected window. | |
1064 | ||
1065 | Optional argument FRAME specifies which frames to investigate | |
1066 | when the specified buffer is already displayed. If the buffer is | |
1067 | already displayed in some window on one of these frames simply | |
1068 | return that window. Possible values of FRAME are: | |
1069 | ||
1070 | `visible' - consider windows on all visible frames. | |
1071 | ||
1072 | 0 - consider windows on all visible or iconified frames. | |
1073 | ||
1074 | t - consider windows on all frames. | |
1075 | ||
1076 | A specific frame - consider windows on that frame only. | |
1077 | ||
1078 | nil - consider windows on the selected frame \(actually the | |
1079 | last non-minibuffer frame\) only. If, however, either | |
1080 | `display-buffer-reuse-frames' or `pop-up-frames' is non-nil | |
1081 | \(non-nil and not graphic-only on a text-only terminal), | |
1082 | consider all visible or iconified frames." | |
1083 | (interactive "BDisplay buffer:\nP") | |
1084 | (let* ((can-use-selected-window | |
1085 | ;; The selected window is usable unless either NOT-THIS-WINDOW | |
1086 | ;; is non-nil, it is dedicated to its buffer, or it is the | |
1087 | ;; `minibuffer-window'. | |
1088 | (not (or not-this-window | |
1089 | (window-dedicated-p (selected-window)) | |
1090 | (window-minibuffer-p)))) | |
1091 | (buffer (if (bufferp buffer-or-name) | |
1092 | buffer-or-name | |
1093 | (get-buffer buffer-or-name))) | |
1094 | (name-of-buffer (buffer-name buffer)) | |
1095 | ;; On text-only terminals do not pop up a new frame when | |
1096 | ;; `pop-up-frames' equals graphic-only. | |
1097 | (use-pop-up-frames (if (eq pop-up-frames 'graphic-only) | |
1098 | (display-graphic-p) | |
1099 | pop-up-frames)) | |
1100 | ;; `frame-to-use' is the frame where to show `buffer' - either | |
1101 | ;; the selected frame or the last nonminibuffer frame. | |
1102 | (frame-to-use | |
1103 | (or (window--frame-usable-p (selected-frame)) | |
1104 | (window--frame-usable-p (last-nonminibuffer-frame)))) | |
1105 | ;; `window-to-use' is the window we use for showing `buffer'. | |
1106 | window-to-use) | |
1107 | (cond | |
1108 | ((not (buffer-live-p buffer)) | |
1109 | (error "No such buffer %s" buffer)) | |
1110 | (display-buffer-function | |
1111 | ;; Let `display-buffer-function' do the job. | |
1112 | (funcall display-buffer-function buffer not-this-window)) | |
1113 | ((and (not not-this-window) | |
1114 | (eq (window-buffer (selected-window)) buffer)) | |
1115 | ;; The selected window already displays BUFFER and | |
1116 | ;; `not-this-window' is nil, so use it. | |
1117 | (window--display-buffer-1 (selected-window))) | |
1118 | ((and can-use-selected-window (same-window-p name-of-buffer)) | |
1119 | ;; If the buffer's name tells us to use the selected window do so. | |
1120 | (window--display-buffer-2 buffer (selected-window))) | |
1121 | ((let ((frames (or frame | |
1122 | (and (or use-pop-up-frames | |
1123 | display-buffer-reuse-frames | |
1124 | (not (last-nonminibuffer-frame))) | |
1125 | 0) | |
1126 | (last-nonminibuffer-frame)))) | |
e331bbf3 MR |
1127 | (setq window-to-use |
1128 | (catch 'found | |
29c45500 MR |
1129 | ;; Search frames for a window displaying BUFFER. Return |
1130 | ;; the selected window only if we are allowed to do so. | |
1131 | (dolist (window (get-buffer-window-list buffer 'nomini frames)) | |
e331bbf3 MR |
1132 | (when (or can-use-selected-window |
1133 | (not (eq (selected-window) window))) | |
1134 | (throw 'found window)))))) | |
1135 | ;; The buffer is already displayed in some window; use that. | |
3c448ab6 MR |
1136 | (window--display-buffer-1 window-to-use)) |
1137 | ((and special-display-function | |
1138 | ;; `special-display-p' returns either t or a list of frame | |
1139 | ;; parameters to pass to `special-display-function'. | |
1140 | (let ((pars (special-display-p name-of-buffer))) | |
1141 | (when pars | |
1142 | (funcall special-display-function | |
1143 | buffer (if (listp pars) pars)))))) | |
1144 | ((or use-pop-up-frames (not frame-to-use)) | |
1145 | ;; We want or need a new frame. | |
d2c9fc42 | 1146 | (let ((win (frame-selected-window (funcall pop-up-frame-function)))) |
04ae543a | 1147 | (window--display-buffer-2 buffer win display-buffer-mark-dedicated))) |
3c448ab6 MR |
1148 | ((and pop-up-windows |
1149 | ;; Make a new window. | |
1150 | (or (not (frame-parameter frame-to-use 'unsplittable)) | |
1151 | ;; If the selected frame cannot be split look at | |
1152 | ;; `last-nonminibuffer-frame'. | |
1153 | (and (eq frame-to-use (selected-frame)) | |
1154 | (setq frame-to-use (last-nonminibuffer-frame)) | |
1155 | (window--frame-usable-p frame-to-use) | |
1156 | (not (frame-parameter frame-to-use 'unsplittable)))) | |
1157 | ;; Attempt to split largest or least recently used window. | |
1158 | (setq window-to-use | |
1159 | (or (window--try-to-split-window | |
1160 | (get-largest-window frame-to-use t)) | |
1161 | (window--try-to-split-window | |
d2c9fc42 | 1162 | (get-lru-window frame-to-use t))))) |
04ae543a SM |
1163 | (window--display-buffer-2 buffer window-to-use |
1164 | display-buffer-mark-dedicated)) | |
a9d451f0 MR |
1165 | ((let ((window-to-undedicate |
1166 | ;; When NOT-THIS-WINDOW is non-nil, temporarily dedicate | |
1167 | ;; the selected window to its buffer, to avoid that some of | |
1168 | ;; the `get-' routines below choose it. (Bug#1415) | |
1169 | (and not-this-window (not (window-dedicated-p)) | |
1170 | (set-window-dedicated-p (selected-window) t) | |
1171 | (selected-window)))) | |
1172 | (unwind-protect | |
1173 | (setq window-to-use | |
1174 | ;; Reuse an existing window. | |
1175 | (or (get-lru-window frame-to-use) | |
1176 | (let ((window (get-buffer-window buffer 'visible))) | |
1177 | (unless (and not-this-window | |
1178 | (eq window (selected-window))) | |
1179 | window)) | |
1180 | (get-largest-window 'visible) | |
1181 | (let ((window (get-buffer-window buffer 0))) | |
1182 | (unless (and not-this-window | |
1183 | (eq window (selected-window))) | |
1184 | window)) | |
1185 | (get-largest-window 0) | |
1186 | (frame-selected-window (funcall pop-up-frame-function)))) | |
1187 | (when (window-live-p window-to-undedicate) | |
1188 | ;; Restore dedicated status of selected window. | |
1189 | (set-window-dedicated-p window-to-undedicate nil)))) | |
3c448ab6 MR |
1190 | (window--even-window-heights window-to-use) |
1191 | (window--display-buffer-2 buffer window-to-use))))) | |
1192 | ||
1193 | (defun pop-to-buffer (buffer-or-name &optional other-window norecord) | |
1194 | "Select buffer BUFFER-OR-NAME in some window, preferably a different one. | |
1195 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
1196 | nil. If BUFFER-OR-NAME is a string not naming an existent | |
1197 | buffer, create a buffer with that name. If BUFFER-OR-NAME is | |
1198 | nil, choose some other buffer. | |
1199 | ||
1200 | If `pop-up-windows' is non-nil, windows can be split to display | |
1201 | the buffer. If optional second arg OTHER-WINDOW is non-nil, | |
1202 | insist on finding another window even if the specified buffer is | |
1203 | already visible in the selected window, and ignore | |
1204 | `same-window-regexps' and `same-window-buffer-names'. | |
1205 | ||
1206 | If the window to show BUFFER-OR-NAME is not on the selected | |
1207 | frame, raise that window's frame and give it input focus. | |
1208 | ||
1209 | This function returns the buffer it switched to. This uses the | |
1210 | function `display-buffer' as a subroutine; see the documentation | |
1211 | of `display-buffer' for additional customization information. | |
1212 | ||
1213 | Optional third arg NORECORD non-nil means do not put this buffer | |
1214 | at the front of the list of recently selected ones." | |
1215 | (let ((buffer | |
1216 | ;; FIXME: This behavior is carried over from the previous C version | |
1217 | ;; of pop-to-buffer, but really we should use just | |
1218 | ;; `get-buffer' here. | |
1219 | (if (null buffer-or-name) (other-buffer (current-buffer)) | |
1220 | (or (get-buffer buffer-or-name) | |
1221 | (let ((buf (get-buffer-create buffer-or-name))) | |
1222 | (set-buffer-major-mode buf) | |
1223 | buf)))) | |
3c448ab6 MR |
1224 | (old-frame (selected-frame)) |
1225 | new-window new-frame) | |
1226 | (set-buffer buffer) | |
1227 | (setq new-window (display-buffer buffer other-window)) | |
13b5221f MR |
1228 | (select-window new-window norecord) |
1229 | (setq new-frame (window-frame new-window)) | |
1230 | (unless (eq new-frame old-frame) | |
1231 | ;; `display-buffer' has chosen another frame, make sure it gets | |
1232 | ;; input focus and is risen. | |
1233 | (select-frame-set-input-focus new-frame)) | |
3c448ab6 MR |
1234 | buffer)) |
1235 | ||
1236 | ;; I think this should be the default; I think people will prefer it--rms. | |
1237 | (defcustom split-window-keep-point t | |
1238 | "If non-nil, \\[split-window-vertically] keeps the original point \ | |
1239 | in both children. | |
1240 | This is often more convenient for editing. | |
1241 | If nil, adjust point in each of the two windows to minimize redisplay. | |
1242 | This is convenient on slow terminals, but point can move strangely. | |
1243 | ||
1244 | This option applies only to `split-window-vertically' and | |
1245 | functions that call it. `split-window' always keeps the original | |
1246 | point in both children." | |
1247 | :type 'boolean | |
1248 | :group 'windows) | |
1249 | ||
1250 | (defun split-window-vertically (&optional size) | |
1251 | "Split selected window into two windows, one above the other. | |
1252 | The upper window gets SIZE lines and the lower one gets the rest. | |
1253 | SIZE negative means the lower window gets -SIZE lines and the | |
1254 | upper one the rest. With no argument, split windows equally or | |
1255 | close to it. Both windows display the same buffer, now current. | |
1256 | ||
1257 | If the variable `split-window-keep-point' is non-nil, both new | |
1258 | windows will get the same value of point as the selected window. | |
1259 | This is often more convenient for editing. The upper window is | |
1260 | the selected window. | |
1261 | ||
1262 | Otherwise, we choose window starts so as to minimize the amount of | |
1263 | redisplay; this is convenient on slow terminals. The new selected | |
1264 | window is the one that the current value of point appears in. The | |
1265 | value of point can change if the text around point is hidden by the | |
1266 | new mode line. | |
1267 | ||
1268 | Regardless of the value of `split-window-keep-point', the upper | |
1269 | window is the original one and the return value is the new, lower | |
1270 | window." | |
1271 | (interactive "P") | |
1272 | (let ((old-window (selected-window)) | |
1273 | (old-point (point)) | |
1274 | (size (and size (prefix-numeric-value size))) | |
1275 | moved-by-window-height moved new-window bottom) | |
1276 | (and size (< size 0) | |
1277 | ;; Handle negative SIZE value. | |
1278 | (setq size (+ (window-height) size))) | |
1279 | (setq new-window (split-window nil size)) | |
1280 | (unless split-window-keep-point | |
7fdbcd83 | 1281 | (with-current-buffer (window-buffer) |
3c448ab6 MR |
1282 | (goto-char (window-start)) |
1283 | (setq moved (vertical-motion (window-height))) | |
1284 | (set-window-start new-window (point)) | |
1285 | (when (> (point) (window-point new-window)) | |
1286 | (set-window-point new-window (point))) | |
1287 | (when (= moved (window-height)) | |
1288 | (setq moved-by-window-height t) | |
1289 | (vertical-motion -1)) | |
1290 | (setq bottom (point))) | |
1291 | (and moved-by-window-height | |
1292 | (<= bottom (point)) | |
1293 | (set-window-point old-window (1- bottom))) | |
1294 | (and moved-by-window-height | |
1295 | (<= (window-start new-window) old-point) | |
1296 | (set-window-point new-window old-point) | |
1297 | (select-window new-window))) | |
1298 | (split-window-save-restore-data new-window old-window))) | |
1299 | ||
1300 | ;; This is to avoid compiler warnings. | |
1301 | (defvar view-return-to-alist) | |
1302 | ||
1303 | (defun split-window-save-restore-data (new-window old-window) | |
1304 | (with-current-buffer (window-buffer) | |
1305 | (when view-mode | |
1306 | (let ((old-info (assq old-window view-return-to-alist))) | |
1307 | (when old-info | |
1308 | (push (cons new-window (cons (car (cdr old-info)) t)) | |
1309 | view-return-to-alist)))) | |
1310 | new-window)) | |
1311 | ||
1312 | (defun split-window-horizontally (&optional size) | |
1313 | "Split selected window into two windows side by side. | |
1314 | The selected window becomes the left one and gets SIZE columns. | |
1315 | SIZE negative means the right window gets -SIZE lines. | |
1316 | ||
1317 | SIZE includes the width of the window's scroll bar; if there are | |
1318 | no scroll bars, it includes the width of the divider column to | |
1319 | the window's right, if any. SIZE omitted or nil means split | |
1320 | window equally. | |
1321 | ||
1322 | The selected window remains selected. Return the new window." | |
1323 | (interactive "P") | |
1324 | (let ((old-window (selected-window)) | |
1325 | (size (and size (prefix-numeric-value size)))) | |
1326 | (and size (< size 0) | |
1327 | ;; Handle negative SIZE value. | |
1328 | (setq size (+ (window-width) size))) | |
1329 | (split-window-save-restore-data (split-window nil size t) old-window))) | |
1330 | ||
1331 | \f | |
1332 | (defun set-window-text-height (window height) | |
9992ea0c | 1333 | "Set the height in lines of the text display area of WINDOW to HEIGHT. |
3c448ab6 MR |
1334 | HEIGHT doesn't include the mode line or header line, if any, or |
1335 | any partial-height lines in the text display area. | |
1336 | ||
1337 | Note that the current implementation of this function cannot | |
1338 | always set the height exactly, but attempts to be conservative, | |
1339 | by allocating more lines than are actually needed in the case | |
1340 | where some error may be present." | |
1341 | (let ((delta (- height (window-text-height window)))) | |
1342 | (unless (zerop delta) | |
1343 | ;; Setting window-min-height to a value like 1 can lead to very | |
1344 | ;; bizarre displays because it also allows Emacs to make *other* | |
1345 | ;; windows 1-line tall, which means that there's no more space for | |
1346 | ;; the modeline. | |
1347 | (let ((window-min-height (min 2 height))) ; One text line plus a modeline. | |
1348 | (if (and window (not (eq window (selected-window)))) | |
1349 | (save-selected-window | |
1350 | (select-window window 'norecord) | |
1351 | (enlarge-window delta)) | |
1352 | (enlarge-window delta)))))) | |
1353 | ||
1354 | \f | |
1355 | (defun enlarge-window-horizontally (columns) | |
1356 | "Make selected window COLUMNS wider. | |
1357 | Interactively, if no argument is given, make selected window one | |
1358 | column wider." | |
1359 | (interactive "p") | |
1360 | (enlarge-window columns t)) | |
1361 | ||
1362 | (defun shrink-window-horizontally (columns) | |
1363 | "Make selected window COLUMNS narrower. | |
1364 | Interactively, if no argument is given, make selected window one | |
1365 | column narrower." | |
1366 | (interactive "p") | |
1367 | (shrink-window columns t)) | |
1368 | ||
1369 | (defun window-buffer-height (window) | |
1370 | "Return the height (in screen lines) of the buffer that WINDOW is displaying." | |
1371 | (with-current-buffer (window-buffer window) | |
1372 | (max 1 | |
1373 | (count-screen-lines (point-min) (point-max) | |
1374 | ;; If buffer ends with a newline, ignore it when | |
1375 | ;; counting height unless point is after it. | |
1376 | (eobp) | |
1377 | window)))) | |
1378 | ||
1379 | (defun count-screen-lines (&optional beg end count-final-newline window) | |
1380 | "Return the number of screen lines in the region. | |
1381 | The number of screen lines may be different from the number of actual lines, | |
1382 | due to line breaking, display table, etc. | |
1383 | ||
1384 | Optional arguments BEG and END default to `point-min' and `point-max' | |
1385 | respectively. | |
1386 | ||
1387 | If region ends with a newline, ignore it unless optional third argument | |
1388 | COUNT-FINAL-NEWLINE is non-nil. | |
1389 | ||
1390 | The optional fourth argument WINDOW specifies the window used for obtaining | |
1391 | parameters such as width, horizontal scrolling, and so on. The default is | |
1392 | to use the selected window's parameters. | |
1393 | ||
1394 | Like `vertical-motion', `count-screen-lines' always uses the current buffer, | |
1395 | regardless of which buffer is displayed in WINDOW. This makes possible to use | |
1396 | `count-screen-lines' in any buffer, whether or not it is currently displayed | |
1397 | in some window." | |
1398 | (unless beg | |
1399 | (setq beg (point-min))) | |
1400 | (unless end | |
1401 | (setq end (point-max))) | |
1402 | (if (= beg end) | |
1403 | 0 | |
1404 | (save-excursion | |
1405 | (save-restriction | |
1406 | (widen) | |
1407 | (narrow-to-region (min beg end) | |
1408 | (if (and (not count-final-newline) | |
1409 | (= ?\n (char-before (max beg end)))) | |
1410 | (1- (max beg end)) | |
1411 | (max beg end))) | |
1412 | (goto-char (point-min)) | |
1413 | (1+ (vertical-motion (buffer-size) window)))))) | |
1414 | ||
1415 | (defun fit-window-to-buffer (&optional window max-height min-height) | |
1416 | "Adjust height of WINDOW to display its buffer's contents exactly. | |
9adf1f06 | 1417 | WINDOW defaults to the selected window. |
3c448ab6 | 1418 | Optional argument MAX-HEIGHT specifies the maximum height of the |
f7baca20 MR |
1419 | window and defaults to the maximum permissible height of a window |
1420 | on WINDOW's frame. | |
3c448ab6 MR |
1421 | Optional argument MIN-HEIGHT specifies the minimum height of the |
1422 | window and defaults to `window-min-height'. | |
1423 | Both, MAX-HEIGHT and MIN-HEIGHT are specified in lines and | |
1424 | include the mode line and header line, if any. | |
3c448ab6 | 1425 | |
9adf1f06 MR |
1426 | Return non-nil if height was orderly adjusted, nil otherwise. |
1427 | ||
f7baca20 MR |
1428 | Caution: This function can delete WINDOW and/or other windows |
1429 | when their height shrinks to less than MIN-HEIGHT." | |
1430 | (interactive) | |
1431 | ;; Do all the work in WINDOW and its buffer and restore the selected | |
1432 | ;; window and the current buffer when we're done. | |
9adf1f06 MR |
1433 | (let ((old-buffer (current-buffer)) |
1434 | value) | |
f7baca20 MR |
1435 | (with-selected-window (or window (setq window (selected-window))) |
1436 | (set-buffer (window-buffer)) | |
1437 | ;; Use `condition-case' to handle any fixed-size windows and other | |
1438 | ;; pitfalls nearby. | |
1439 | (condition-case nil | |
1440 | (let* (;; MIN-HEIGHT must not be less than 1 and defaults to | |
1441 | ;; `window-min-height'. | |
1442 | (min-height (max (or min-height window-min-height) 1)) | |
1443 | (max-window-height | |
1444 | ;; Maximum height of any window on this frame. | |
1445 | (min (window-height (frame-root-window)) (frame-height))) | |
1446 | ;; MAX-HEIGHT must not be larger than max-window-height and | |
1447 | ;; defaults to max-window-height. | |
1448 | (max-height | |
1449 | (min (or max-height max-window-height) max-window-height)) | |
1450 | (desired-height | |
1451 | ;; The height necessary to show all of WINDOW's buffer, | |
1452 | ;; constrained by MIN-HEIGHT and MAX-HEIGHT. | |
1453 | (max | |
1454 | (min | |
1455 | ;; For an empty buffer `count-screen-lines' returns zero. | |
1456 | ;; Even in that case we need one line for the cursor. | |
1457 | (+ (max (count-screen-lines) 1) | |
1458 | ;; For non-minibuffers count the mode line, if any. | |
1459 | (if (and (not (window-minibuffer-p)) mode-line-format) | |
1460 | 1 0) | |
1461 | ;; Count the header line, if any. | |
1462 | (if header-line-format 1 0)) | |
1463 | max-height) | |
1464 | min-height)) | |
1465 | (delta | |
1466 | ;; How much the window height has to change. | |
1467 | (if (= (window-height) (window-height (frame-root-window))) | |
1468 | ;; Don't try to resize a full-height window. | |
1469 | 0 | |
1470 | (- desired-height (window-height)))) | |
1471 | ;; Do something reasonable so `enlarge-window' can make | |
1472 | ;; windows as small as MIN-HEIGHT. | |
1473 | (window-min-height (min min-height window-min-height))) | |
1474 | ;; Don't try to redisplay with the cursor at the end on its | |
1475 | ;; own line--that would force a scroll and spoil things. | |
1476 | (when (and (eobp) (bolp) (not (bobp))) | |
1477 | (set-window-point window (1- (window-point)))) | |
1478 | ;; Adjust WINDOW's height to the nominally correct one | |
1479 | ;; (which may actually be slightly off because of variable | |
1480 | ;; height text, etc). | |
1481 | (unless (zerop delta) | |
1482 | (enlarge-window delta)) | |
1483 | ;; `enlarge-window' might have deleted WINDOW, so make sure | |
1484 | ;; WINDOW's still alive for the remainder of this. | |
1485 | ;; Note: Deleting WINDOW is clearly counter-intuitive in | |
1486 | ;; this context, but we can't do much about it given the | |
1487 | ;; current semantics of `enlarge-window'. | |
1488 | (when (window-live-p window) | |
1489 | ;; Check if the last line is surely fully visible. If | |
1490 | ;; not, enlarge the window. | |
1491 | (let ((end (save-excursion | |
1492 | (goto-char (point-max)) | |
1493 | (when (and (bolp) (not (bobp))) | |
1494 | ;; Don't include final newline. | |
1495 | (backward-char 1)) | |
1496 | (when truncate-lines | |
1497 | ;; If line-wrapping is turned off, test the | |
1498 | ;; beginning of the last line for | |
1499 | ;; visibility instead of the end, as the | |
1500 | ;; end of the line could be invisible by | |
1501 | ;; virtue of extending past the edge of the | |
1502 | ;; window. | |
1503 | (forward-line 0)) | |
1504 | (point)))) | |
1505 | (set-window-vscroll window 0) | |
1506 | (while (and (< desired-height max-height) | |
1507 | (= desired-height (window-height)) | |
1508 | (not (pos-visible-in-window-p end))) | |
1509 | (enlarge-window 1) | |
9adf1f06 MR |
1510 | (setq desired-height (1+ desired-height)))) |
1511 | ;; Return non-nil only if nothing "bad" happened. | |
1512 | (setq value t))) | |
f7baca20 MR |
1513 | (error nil))) |
1514 | (when (buffer-live-p old-buffer) | |
9adf1f06 MR |
1515 | (set-buffer old-buffer)) |
1516 | value)) | |
3c448ab6 MR |
1517 | |
1518 | (defun window-safely-shrinkable-p (&optional window) | |
1519 | "Return t if WINDOW can be shrunk without shrinking other windows. | |
1520 | WINDOW defaults to the selected window." | |
1521 | (with-selected-window (or window (selected-window)) | |
1522 | (let ((edges (window-edges))) | |
1523 | (or (= (nth 2 edges) (nth 2 (window-edges (previous-window)))) | |
1524 | (= (nth 0 edges) (nth 0 (window-edges (next-window)))))))) | |
1525 | ||
1526 | (defun shrink-window-if-larger-than-buffer (&optional window) | |
1527 | "Shrink height of WINDOW if its buffer doesn't need so many lines. | |
1528 | More precisely, shrink WINDOW vertically to be as small as | |
1529 | possible, while still showing the full contents of its buffer. | |
1530 | WINDOW defaults to the selected window. | |
1531 | ||
1532 | Do not shrink to less than `window-min-height' lines. Do nothing | |
1533 | if the buffer contains more lines than the present window height, | |
1534 | or if some of the window's contents are scrolled out of view, or | |
1535 | if shrinking this window would also shrink another window, or if | |
1536 | the window is the only window of its frame. | |
1537 | ||
1538 | Return non-nil if the window was shrunk, nil otherwise." | |
1539 | (interactive) | |
1540 | (when (null window) | |
1541 | (setq window (selected-window))) | |
1542 | (let* ((frame (window-frame window)) | |
1543 | (mini (frame-parameter frame 'minibuffer)) | |
1544 | (edges (window-edges window))) | |
1545 | (if (and (not (eq window (frame-root-window frame))) | |
1546 | (window-safely-shrinkable-p window) | |
1547 | (pos-visible-in-window-p (point-min) window) | |
1548 | (not (eq mini 'only)) | |
1549 | (or (not mini) | |
1550 | (let ((mini-window (minibuffer-window frame))) | |
1551 | (or (null mini-window) | |
1552 | (not (eq frame (window-frame mini-window))) | |
1553 | (< (nth 3 edges) | |
1554 | (nth 1 (window-edges mini-window))) | |
1555 | (> (nth 1 edges) | |
1556 | (frame-parameter frame 'menu-bar-lines)))))) | |
1557 | (fit-window-to-buffer window (window-height window))))) | |
1558 | ||
1559 | (defun kill-buffer-and-window () | |
1560 | "Kill the current buffer and delete the selected window." | |
1561 | (interactive) | |
1562 | (let ((window-to-delete (selected-window)) | |
1563 | (buffer-to-kill (current-buffer)) | |
1564 | (delete-window-hook (lambda () | |
1565 | (condition-case nil | |
1566 | (delete-window) | |
1567 | (error nil))))) | |
1568 | (unwind-protect | |
1569 | (progn | |
1570 | (add-hook 'kill-buffer-hook delete-window-hook t t) | |
1571 | (if (kill-buffer (current-buffer)) | |
1572 | ;; If `delete-window' failed before, we rerun it to regenerate | |
1573 | ;; the error so it can be seen in the echo area. | |
1574 | (when (eq (selected-window) window-to-delete) | |
1575 | (delete-window)))) | |
1576 | ;; If the buffer is not dead for some reason (probably because | |
1577 | ;; of a `quit' signal), remove the hook again. | |
1578 | (condition-case nil | |
1579 | (with-current-buffer buffer-to-kill | |
1580 | (remove-hook 'kill-buffer-hook delete-window-hook t)) | |
1581 | (error nil))))) | |
1582 | ||
1583 | (defun quit-window (&optional kill window) | |
1584 | "Quit WINDOW and bury its buffer. | |
1585 | With a prefix argument, kill the buffer instead. WINDOW defaults | |
1586 | to the selected window. | |
1587 | ||
1588 | If WINDOW is non-nil, dedicated, or a minibuffer window, delete | |
1589 | it and, if it's alone on its frame, its frame too. Otherwise, or | |
1590 | if deleting WINDOW fails in any of the preceding cases, display | |
1591 | another buffer in WINDOW using `switch-to-buffer'. | |
1592 | ||
1593 | Optional argument KILL non-nil means kill WINDOW's buffer. | |
1594 | Otherwise, bury WINDOW's buffer, see `bury-buffer'." | |
1595 | (interactive "P") | |
1596 | (let ((buffer (window-buffer window))) | |
1597 | (if (or window | |
1598 | (window-minibuffer-p window) | |
1599 | (window-dedicated-p window)) | |
1600 | ;; WINDOW is either non-nil, a minibuffer window, or dedicated; | |
1601 | ;; try to delete it. | |
a0c859f0 MR |
1602 | (let* ((window (or window (selected-window))) |
1603 | (frame (window-frame window))) | |
3c448ab6 MR |
1604 | (if (eq window (frame-root-window frame)) |
1605 | ;; WINDOW is alone on its frame. `delete-windows-on' | |
1606 | ;; knows how to handle that case. | |
1607 | (delete-windows-on buffer frame) | |
1608 | ;; There are other windows on its frame, delete WINDOW. | |
1609 | (delete-window window))) | |
1610 | ;; Otherwise, switch to another buffer in the selected window. | |
1611 | (switch-to-buffer nil)) | |
1612 | ||
1613 | ;; Deal with the buffer. | |
1614 | (if kill | |
1615 | (kill-buffer buffer) | |
1616 | (bury-buffer buffer)))) | |
1617 | ||
74f806a1 | 1618 | \f |
3c448ab6 MR |
1619 | (defvar recenter-last-op nil |
1620 | "Indicates the last recenter operation performed. | |
0116abbd JL |
1621 | Possible values: `top', `middle', `bottom', integer or float numbers.") |
1622 | ||
1623 | (defcustom recenter-positions '(middle top bottom) | |
1624 | "Cycling order for `recenter-top-bottom'. | |
1625 | A list of elements with possible values `top', `middle', `bottom', | |
1626 | integer or float numbers that define the cycling order for | |
1627 | the command `recenter-top-bottom'. | |
1628 | ||
1629 | Top and bottom destinations are `scroll-margin' lines the from true | |
1630 | window top and bottom. Middle redraws the frame and centers point | |
1631 | vertically within the window. Integer number moves current line to | |
1632 | the specified absolute window-line. Float number between 0.0 and 1.0 | |
1633 | means the percentage of the screen space from the top. The default | |
1634 | cycling order is middle -> top -> bottom." | |
1635 | :type '(repeat (choice | |
1636 | (const :tag "Top" top) | |
1637 | (const :tag "Middle" middle) | |
1638 | (const :tag "Bottom" bottom) | |
1639 | (integer :tag "Line number") | |
1640 | (float :tag "Percentage"))) | |
1641 | :version "23.2" | |
1642 | :group 'windows) | |
3c448ab6 MR |
1643 | |
1644 | (defun recenter-top-bottom (&optional arg) | |
0116abbd JL |
1645 | "Move current buffer line to the specified window line. |
1646 | With no prefix argument, successive calls place point according | |
1647 | to the cycling order defined by `recenter-positions'. | |
3c448ab6 MR |
1648 | |
1649 | A prefix argument is handled like `recenter': | |
1650 | With numeric prefix ARG, move current line to window-line ARG. | |
0116abbd | 1651 | With plain `C-u', move current line to window center." |
3c448ab6 MR |
1652 | (interactive "P") |
1653 | (cond | |
0116abbd | 1654 | (arg (recenter arg)) ; Always respect ARG. |
3c448ab6 | 1655 | (t |
0116abbd JL |
1656 | (setq recenter-last-op |
1657 | (if (eq this-command last-command) | |
1658 | (car (or (cdr (member recenter-last-op recenter-positions)) | |
1659 | recenter-positions)) | |
1660 | (car recenter-positions))) | |
3c448ab6 MR |
1661 | (let ((this-scroll-margin |
1662 | (min (max 0 scroll-margin) | |
1663 | (truncate (/ (window-body-height) 4.0))))) | |
1664 | (cond ((eq recenter-last-op 'middle) | |
0116abbd | 1665 | (recenter)) |
3c448ab6 | 1666 | ((eq recenter-last-op 'top) |
0116abbd JL |
1667 | (recenter this-scroll-margin)) |
1668 | ((eq recenter-last-op 'bottom) | |
1669 | (recenter (- -1 this-scroll-margin))) | |
1670 | ((integerp recenter-last-op) | |
1671 | (recenter recenter-last-op)) | |
1672 | ((floatp recenter-last-op) | |
1673 | (recenter (round (* recenter-last-op (window-height)))))))))) | |
3c448ab6 MR |
1674 | |
1675 | (define-key global-map [?\C-l] 'recenter-top-bottom) | |
216349f8 | 1676 | |
216349f8 SM |
1677 | (defun move-to-window-line-top-bottom (&optional arg) |
1678 | "Position point relative to window. | |
1679 | ||
0f202d5d | 1680 | With a prefix argument ARG, acts like `move-to-window-line'. |
216349f8 SM |
1681 | |
1682 | With no argument, positions point at center of window. | |
0116abbd JL |
1683 | Successive calls position point at positions defined |
1684 | by `recenter-positions'." | |
216349f8 SM |
1685 | (interactive "P") |
1686 | (cond | |
0116abbd | 1687 | (arg (move-to-window-line arg)) ; Always respect ARG. |
216349f8 | 1688 | (t |
0116abbd JL |
1689 | (setq recenter-last-op |
1690 | (if (eq this-command last-command) | |
1691 | (car (or (cdr (member recenter-last-op recenter-positions)) | |
1692 | recenter-positions)) | |
1693 | (car recenter-positions))) | |
216349f8 SM |
1694 | (let ((this-scroll-margin |
1695 | (min (max 0 scroll-margin) | |
1696 | (truncate (/ (window-body-height) 4.0))))) | |
0f202d5d | 1697 | (cond ((eq recenter-last-op 'middle) |
0116abbd | 1698 | (call-interactively 'move-to-window-line)) |
0f202d5d | 1699 | ((eq recenter-last-op 'top) |
0116abbd JL |
1700 | (move-to-window-line this-scroll-margin)) |
1701 | ((eq recenter-last-op 'bottom) | |
1702 | (move-to-window-line (- -1 this-scroll-margin))) | |
1703 | ((integerp recenter-last-op) | |
1704 | (move-to-window-line recenter-last-op)) | |
1705 | ((floatp recenter-last-op) | |
1706 | (move-to-window-line (round (* recenter-last-op (window-height)))))))))) | |
216349f8 SM |
1707 | |
1708 | (define-key global-map [?\M-r] 'move-to-window-line-top-bottom) | |
1709 | ||
3c448ab6 | 1710 | \f |
74f806a1 JL |
1711 | ;;; Scrolling commands. |
1712 | ||
1713 | ;;; Scrolling commands which does not signal errors at top/bottom | |
1714 | ;;; of buffer at first key-press (instead moves to top/bottom | |
1715 | ;;; of buffer). | |
1716 | ||
1717 | (defcustom scroll-error-top-bottom nil | |
1718 | "Move point to top/bottom of buffer before signalling a scrolling error. | |
1719 | A value of nil means just signal an error if no more scrolling possible. | |
1720 | A value of t means point moves to the beginning or the end of the buffer | |
1721 | \(depending on scrolling direction) when no more scrolling possible. | |
1722 | When point is already on that position, then signal an error." | |
1723 | :type 'boolean | |
1724 | :group 'scrolling | |
1725 | :version "24.1") | |
1726 | ||
1727 | (defun scroll-up-command (&optional arg) | |
1728 | "Scroll text of selected window upward ARG lines; or near full screen if no ARG. | |
1729 | If `scroll-error-top-bottom' is non-nil and `scroll-up' cannot | |
1730 | scroll window further, move cursor to the bottom line. | |
1731 | When point is already on that position, then signal an error. | |
1732 | A near full screen is `next-screen-context-lines' less than a full screen. | |
1733 | Negative ARG means scroll downward. | |
1734 | If ARG is the atom `-', scroll downward by nearly full screen." | |
1735 | (interactive "^P") | |
1736 | (cond | |
1737 | ((null scroll-error-top-bottom) | |
1738 | (scroll-up arg)) | |
1739 | ((eq arg '-) | |
1740 | (scroll-down-command nil)) | |
1741 | ((< (prefix-numeric-value arg) 0) | |
1742 | (scroll-down-command (- (prefix-numeric-value arg)))) | |
1743 | ((eobp) | |
1744 | (scroll-up arg)) ; signal error | |
1745 | (t | |
1746 | (condition-case nil | |
1747 | (scroll-up arg) | |
1748 | (end-of-buffer | |
1749 | (if arg | |
1750 | ;; When scrolling by ARG lines can't be done, | |
1751 | ;; move by ARG lines instead. | |
1752 | (forward-line arg) | |
1753 | ;; When ARG is nil for full-screen scrolling, | |
1754 | ;; move to the bottom of the buffer. | |
1755 | (goto-char (point-max)))))))) | |
1756 | ||
1757 | (put 'scroll-up-command 'scroll-command t) | |
1758 | ||
1759 | (defun scroll-down-command (&optional arg) | |
1760 | "Scroll text of selected window down ARG lines; or near full screen if no ARG. | |
1761 | If `scroll-error-top-bottom' is non-nil and `scroll-down' cannot | |
1762 | scroll window further, move cursor to the top line. | |
1763 | When point is already on that position, then signal an error. | |
1764 | A near full screen is `next-screen-context-lines' less than a full screen. | |
1765 | Negative ARG means scroll upward. | |
1766 | If ARG is the atom `-', scroll upward by nearly full screen." | |
1767 | (interactive "^P") | |
1768 | (cond | |
1769 | ((null scroll-error-top-bottom) | |
1770 | (scroll-down arg)) | |
1771 | ((eq arg '-) | |
1772 | (scroll-up-command nil)) | |
1773 | ((< (prefix-numeric-value arg) 0) | |
1774 | (scroll-up-command (- (prefix-numeric-value arg)))) | |
1775 | ((bobp) | |
1776 | (scroll-down arg)) ; signal error | |
1777 | (t | |
1778 | (condition-case nil | |
1779 | (scroll-down arg) | |
1780 | (beginning-of-buffer | |
1781 | (if arg | |
1782 | ;; When scrolling by ARG lines can't be done, | |
1783 | ;; move by ARG lines instead. | |
1784 | (forward-line (- arg)) | |
1785 | ;; When ARG is nil for full-screen scrolling, | |
1786 | ;; move to the top of the buffer. | |
1787 | (goto-char (point-min)))))))) | |
1788 | ||
1789 | (put 'scroll-down-command 'scroll-command t) | |
1790 | ||
1791 | ;;; Scrolling commands which scroll a line instead of full screen. | |
1792 | ||
1793 | (defun scroll-up-line (&optional arg) | |
1794 | "Scroll text of selected window upward ARG lines; or one line if no ARG. | |
1795 | If ARG is omitted or nil, scroll upward by one line. | |
1796 | This is different from `scroll-up-command' that scrolls a full screen." | |
1797 | (interactive "p") | |
1798 | (scroll-up (or arg 1))) | |
1799 | ||
1800 | (put 'scroll-up-line 'scroll-command t) | |
1801 | ||
1802 | (defun scroll-down-line (&optional arg) | |
1803 | "Scroll text of selected window down ARG lines; or one line if no ARG. | |
1804 | If ARG is omitted or nil, scroll down by one line. | |
1805 | This is different from `scroll-down-command' that scrolls a full screen." | |
1806 | (interactive "p") | |
1807 | (scroll-down (or arg 1))) | |
1808 | ||
1809 | (put 'scroll-down-line 'scroll-command t) | |
1810 | ||
1811 | \f | |
1812 | (defun scroll-other-window-down (lines) | |
1813 | "Scroll the \"other window\" down. | |
1814 | For more details, see the documentation for `scroll-other-window'." | |
1815 | (interactive "P") | |
1816 | (scroll-other-window | |
1817 | ;; Just invert the argument's meaning. | |
1818 | ;; We can do that without knowing which window it will be. | |
1819 | (if (eq lines '-) nil | |
1820 | (if (null lines) '- | |
1821 | (- (prefix-numeric-value lines)))))) | |
1822 | ||
1823 | (defun beginning-of-buffer-other-window (arg) | |
1824 | "Move point to the beginning of the buffer in the other window. | |
1825 | Leave mark at previous position. | |
1826 | With arg N, put point N/10 of the way from the true beginning." | |
1827 | (interactive "P") | |
1828 | (let ((orig-window (selected-window)) | |
1829 | (window (other-window-for-scrolling))) | |
1830 | ;; We use unwind-protect rather than save-window-excursion | |
1831 | ;; because the latter would preserve the things we want to change. | |
1832 | (unwind-protect | |
1833 | (progn | |
1834 | (select-window window) | |
1835 | ;; Set point and mark in that window's buffer. | |
1836 | (with-no-warnings | |
1837 | (beginning-of-buffer arg)) | |
1838 | ;; Set point accordingly. | |
1839 | (recenter '(t))) | |
1840 | (select-window orig-window)))) | |
1841 | ||
1842 | (defun end-of-buffer-other-window (arg) | |
1843 | "Move point to the end of the buffer in the other window. | |
1844 | Leave mark at previous position. | |
1845 | With arg N, put point N/10 of the way from the true end." | |
1846 | (interactive "P") | |
1847 | ;; See beginning-of-buffer-other-window for comments. | |
1848 | (let ((orig-window (selected-window)) | |
1849 | (window (other-window-for-scrolling))) | |
1850 | (unwind-protect | |
1851 | (progn | |
1852 | (select-window window) | |
1853 | (with-no-warnings | |
1854 | (end-of-buffer arg)) | |
1855 | (recenter '(t))) | |
1856 | (select-window orig-window)))) | |
1857 | ||
1858 | \f | |
3c448ab6 MR |
1859 | (defvar mouse-autoselect-window-timer nil |
1860 | "Timer used by delayed window autoselection.") | |
1861 | ||
1862 | (defvar mouse-autoselect-window-position nil | |
1863 | "Last mouse position recorded by delayed window autoselection.") | |
1864 | ||
1865 | (defvar mouse-autoselect-window-window nil | |
1866 | "Last window recorded by delayed window autoselection.") | |
1867 | ||
1868 | (defvar mouse-autoselect-window-state nil | |
1869 | "When non-nil, special state of delayed window autoselection. | |
1870 | Possible values are `suspend' \(suspend autoselection after a menu or | |
1871 | scrollbar interaction\) and `select' \(the next invocation of | |
1872 | 'handle-select-window' shall select the window immediately\).") | |
1873 | ||
1874 | (defun mouse-autoselect-window-cancel (&optional force) | |
1875 | "Cancel delayed window autoselection. | |
1876 | Optional argument FORCE means cancel unconditionally." | |
1877 | (unless (and (not force) | |
1878 | ;; Don't cancel for select-window or select-frame events | |
1879 | ;; or when the user drags a scroll bar. | |
1880 | (or (memq this-command | |
1881 | '(handle-select-window handle-switch-frame)) | |
1882 | (and (eq this-command 'scroll-bar-toolkit-scroll) | |
1883 | (memq (nth 4 (event-end last-input-event)) | |
1884 | '(handle end-scroll))))) | |
1885 | (setq mouse-autoselect-window-state nil) | |
1886 | (when (timerp mouse-autoselect-window-timer) | |
1887 | (cancel-timer mouse-autoselect-window-timer)) | |
1888 | (remove-hook 'pre-command-hook 'mouse-autoselect-window-cancel))) | |
1889 | ||
1890 | (defun mouse-autoselect-window-start (mouse-position &optional window suspend) | |
1891 | "Start delayed window autoselection. | |
1892 | MOUSE-POSITION is the last position where the mouse was seen as returned | |
1893 | by `mouse-position'. Optional argument WINDOW non-nil denotes the | |
1894 | window where the mouse was seen. Optional argument SUSPEND non-nil | |
1895 | means suspend autoselection." | |
1896 | ;; Record values for MOUSE-POSITION, WINDOW, and SUSPEND. | |
1897 | (setq mouse-autoselect-window-position mouse-position) | |
1898 | (when window (setq mouse-autoselect-window-window window)) | |
1899 | (setq mouse-autoselect-window-state (when suspend 'suspend)) | |
1900 | ;; Install timer which runs `mouse-autoselect-window-select' after | |
1901 | ;; `mouse-autoselect-window' seconds. | |
1902 | (setq mouse-autoselect-window-timer | |
1903 | (run-at-time | |
1904 | (abs mouse-autoselect-window) nil 'mouse-autoselect-window-select))) | |
1905 | ||
1906 | (defun mouse-autoselect-window-select () | |
1907 | "Select window with delayed window autoselection. | |
1908 | If the mouse position has stabilized in a non-selected window, select | |
1909 | that window. The minibuffer window is selected only if the minibuffer is | |
1910 | active. This function is run by `mouse-autoselect-window-timer'." | |
1911 | (condition-case nil | |
1912 | (let* ((mouse-position (mouse-position)) | |
1913 | (window | |
1914 | (condition-case nil | |
1915 | (window-at (cadr mouse-position) (cddr mouse-position) | |
1916 | (car mouse-position)) | |
1917 | (error nil)))) | |
1918 | (cond | |
1919 | ((or (menu-or-popup-active-p) | |
1920 | (and window | |
1921 | (not (coordinates-in-window-p (cdr mouse-position) window)))) | |
1922 | ;; A menu / popup dialog is active or the mouse is on the scroll-bar | |
1923 | ;; of WINDOW, temporarily suspend delayed autoselection. | |
1924 | (mouse-autoselect-window-start mouse-position nil t)) | |
1925 | ((eq mouse-autoselect-window-state 'suspend) | |
1926 | ;; Delayed autoselection was temporarily suspended, reenable it. | |
1927 | (mouse-autoselect-window-start mouse-position)) | |
1928 | ((and window (not (eq window (selected-window))) | |
1929 | (or (not (numberp mouse-autoselect-window)) | |
1930 | (and (> mouse-autoselect-window 0) | |
1931 | ;; If `mouse-autoselect-window' is positive, select | |
1932 | ;; window if the window is the same as before. | |
1933 | (eq window mouse-autoselect-window-window)) | |
1934 | ;; Otherwise select window if the mouse is at the same | |
1935 | ;; position as before. Observe that the first test after | |
1936 | ;; starting autoselection usually fails since the value of | |
1937 | ;; `mouse-autoselect-window-position' recorded there is the | |
1938 | ;; position where the mouse has entered the new window and | |
1939 | ;; not necessarily where the mouse has stopped moving. | |
1940 | (equal mouse-position mouse-autoselect-window-position)) | |
1941 | ;; The minibuffer is a candidate window if it's active. | |
1942 | (or (not (window-minibuffer-p window)) | |
1943 | (eq window (active-minibuffer-window)))) | |
1944 | ;; Mouse position has stabilized in non-selected window: Cancel | |
1945 | ;; delayed autoselection and try to select that window. | |
1946 | (mouse-autoselect-window-cancel t) | |
1947 | ;; Select window where mouse appears unless the selected window is the | |
1948 | ;; minibuffer. Use `unread-command-events' in order to execute pre- | |
1949 | ;; and post-command hooks and trigger idle timers. To avoid delaying | |
1950 | ;; autoselection again, set `mouse-autoselect-window-state'." | |
1951 | (unless (window-minibuffer-p (selected-window)) | |
1952 | (setq mouse-autoselect-window-state 'select) | |
1953 | (setq unread-command-events | |
1954 | (cons (list 'select-window (list window)) | |
1955 | unread-command-events)))) | |
1956 | ((or (and window (eq window (selected-window))) | |
1957 | (not (numberp mouse-autoselect-window)) | |
1958 | (equal mouse-position mouse-autoselect-window-position)) | |
1959 | ;; Mouse position has either stabilized in the selected window or at | |
1960 | ;; `mouse-autoselect-window-position': Cancel delayed autoselection. | |
1961 | (mouse-autoselect-window-cancel t)) | |
1962 | (t | |
1963 | ;; Mouse position has not stabilized yet, resume delayed | |
1964 | ;; autoselection. | |
1965 | (mouse-autoselect-window-start mouse-position window)))) | |
1966 | (error nil))) | |
1967 | ||
1968 | (defun handle-select-window (event) | |
1969 | "Handle select-window events." | |
1970 | (interactive "e") | |
1971 | (let ((window (posn-window (event-start event)))) | |
1972 | (unless (or (not (window-live-p window)) | |
1973 | ;; Don't switch if we're currently in the minibuffer. | |
1974 | ;; This tries to work around problems where the | |
1975 | ;; minibuffer gets unselected unexpectedly, and where | |
1976 | ;; you then have to move your mouse all the way down to | |
1977 | ;; the minibuffer to select it. | |
1978 | (window-minibuffer-p (selected-window)) | |
1979 | ;; Don't switch to minibuffer window unless it's active. | |
1980 | (and (window-minibuffer-p window) | |
1981 | (not (minibuffer-window-active-p window))) | |
1982 | ;; Don't switch when autoselection shall be delayed. | |
1983 | (and (numberp mouse-autoselect-window) | |
1984 | (not (zerop mouse-autoselect-window)) | |
1985 | (not (eq mouse-autoselect-window-state 'select)) | |
1986 | (progn | |
1987 | ;; Cancel any delayed autoselection. | |
1988 | (mouse-autoselect-window-cancel t) | |
1989 | ;; Start delayed autoselection from current mouse | |
1990 | ;; position and window. | |
1991 | (mouse-autoselect-window-start (mouse-position) window) | |
1992 | ;; Executing a command cancels delayed autoselection. | |
1993 | (add-hook | |
1994 | 'pre-command-hook 'mouse-autoselect-window-cancel)))) | |
1995 | (when mouse-autoselect-window | |
1996 | ;; Reset state of delayed autoselection. | |
1997 | (setq mouse-autoselect-window-state nil) | |
1998 | ;; Run `mouse-leave-buffer-hook' when autoselecting window. | |
1999 | (run-hooks 'mouse-leave-buffer-hook)) | |
2000 | (select-window window)))) | |
2001 | ||
2002 | (defun delete-other-windows-vertically (&optional window) | |
2003 | "Delete the windows in the same column with WINDOW, but not WINDOW itself. | |
2004 | This may be a useful alternative binding for \\[delete-other-windows] | |
2005 | if you often split windows horizontally." | |
2006 | (interactive) | |
2007 | (let* ((window (or window (selected-window))) | |
2008 | (edges (window-edges window)) | |
2009 | (w window) delenda) | |
2010 | (while (not (eq (setq w (next-window w 1)) window)) | |
2011 | (let ((e (window-edges w))) | |
2012 | (when (and (= (car e) (car edges)) | |
2013 | (= (caddr e) (caddr edges))) | |
2014 | (push w delenda)))) | |
2015 | (mapc 'delete-window delenda))) | |
2016 | ||
2017 | (defun truncated-partial-width-window-p (&optional window) | |
2018 | "Return non-nil if lines in WINDOW are specifically truncated due to its width. | |
2019 | WINDOW defaults to the selected window. | |
2020 | Return nil if WINDOW is not a partial-width window | |
2021 | (regardless of the value of `truncate-lines'). | |
2022 | Otherwise, consult the value of `truncate-partial-width-windows' | |
2023 | for the buffer shown in WINDOW." | |
2024 | (unless window | |
2025 | (setq window (selected-window))) | |
2026 | (unless (window-full-width-p window) | |
2027 | (let ((t-p-w-w (buffer-local-value 'truncate-partial-width-windows | |
2028 | (window-buffer window)))) | |
2029 | (if (integerp t-p-w-w) | |
2030 | (< (window-width window) t-p-w-w) | |
2031 | t-p-w-w)))) | |
2032 | ||
2033 | (define-key ctl-x-map "2" 'split-window-vertically) | |
2034 | (define-key ctl-x-map "3" 'split-window-horizontally) | |
2035 | (define-key ctl-x-map "}" 'enlarge-window-horizontally) | |
2036 | (define-key ctl-x-map "{" 'shrink-window-horizontally) | |
2037 | (define-key ctl-x-map "-" 'shrink-window-if-larger-than-buffer) | |
2038 | (define-key ctl-x-map "+" 'balance-windows) | |
2039 | (define-key ctl-x-4-map "0" 'kill-buffer-and-window) | |
2040 | ||
2041 | ;; arch-tag: b508dfcc-c353-4c37-89fa-e773fe10cea9 | |
2042 | ;;; window.el ends here |