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1 | ;;; window.el --- GNU Emacs window commands aside from those written in C |
2 | ||
73b0cd50 | 3 | ;; Copyright (C) 1985, 1989, 1992-1994, 2000-2011 |
3689984f | 4 | ;; Free Software Foundation, Inc. |
3c448ab6 MR |
5 | |
6 | ;; Maintainer: FSF | |
7 | ;; Keywords: internal | |
bd78fa1d | 8 | ;; Package: emacs |
3c448ab6 MR |
9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
12 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
14 | ;; the Free Software Foundation, either version 3 of the License, or | |
15 | ;; (at your option) any later version. | |
16 | ||
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
24 | ||
25 | ;;; Commentary: | |
26 | ||
27 | ;; Window tree functions. | |
28 | ||
29 | ;;; Code: | |
30 | ||
31 | (eval-when-compile (require 'cl)) | |
32 | ||
3c448ab6 MR |
33 | (defmacro save-selected-window (&rest body) |
34 | "Execute BODY, then select the previously selected window. | |
35 | The value returned is the value of the last form in BODY. | |
36 | ||
37 | This macro saves and restores the selected window, as well as the | |
38 | selected window in each frame. If the previously selected window | |
39 | is no longer live, then whatever window is selected at the end of | |
40 | BODY remains selected. If the previously selected window of some | |
41 | frame is no longer live at the end of BODY, that frame's selected | |
42 | window is left alone. | |
43 | ||
44 | This macro saves and restores the current buffer, since otherwise | |
45 | its normal operation could make a different buffer current. The | |
46 | order of recently selected windows and the buffer list ordering | |
47 | are not altered by this macro (unless they are altered in BODY)." | |
f291fe60 | 48 | (declare (indent 0) (debug t)) |
3c448ab6 MR |
49 | `(let ((save-selected-window-window (selected-window)) |
50 | ;; It is necessary to save all of these, because calling | |
51 | ;; select-window changes frame-selected-window for whatever | |
52 | ;; frame that window is in. | |
53 | (save-selected-window-alist | |
54 | (mapcar (lambda (frame) (cons frame (frame-selected-window frame))) | |
55 | (frame-list)))) | |
56 | (save-current-buffer | |
57 | (unwind-protect | |
58 | (progn ,@body) | |
59 | (dolist (elt save-selected-window-alist) | |
60 | (and (frame-live-p (car elt)) | |
61 | (window-live-p (cdr elt)) | |
62 | (set-frame-selected-window (car elt) (cdr elt) 'norecord))) | |
63 | (when (window-live-p save-selected-window-window) | |
64 | (select-window save-selected-window-window 'norecord)))))) | |
65 | ||
85cc1f11 MR |
66 | ;; The following two functions are like `window-next' and `window-prev' |
67 | ;; but the WINDOW argument is _not_ optional (so they don't substitute | |
68 | ;; the selected window for nil), and they return nil when WINDOW doesn't | |
69 | ;; have a parent (like a frame's root window or a minibuffer window). | |
70 | (defsubst window-right (window) | |
71 | "Return WINDOW's right sibling. | |
72 | Return nil if WINDOW is the root window of its frame. WINDOW can | |
73 | be any window." | |
74 | (and window (window-parent window) (window-next window))) | |
75 | ||
76 | (defsubst window-left (window) | |
77 | "Return WINDOW's left sibling. | |
78 | Return nil if WINDOW is the root window of its frame. WINDOW can | |
79 | be any window." | |
80 | (and window (window-parent window) (window-prev window))) | |
81 | ||
82 | (defsubst window-child (window) | |
83 | "Return WINDOW's first child window." | |
84 | (or (window-vchild window) (window-hchild window))) | |
85 | ||
86 | (defun window-child-count (window) | |
87 | "Return number of WINDOW's child windows." | |
88 | (let ((count 0)) | |
89 | (when (and (windowp window) (setq window (window-child window))) | |
90 | (while window | |
91 | (setq count (1+ count)) | |
92 | (setq window (window-next window)))) | |
93 | count)) | |
94 | ||
95 | (defun window-last-child (window) | |
96 | "Return last child window of WINDOW." | |
97 | (when (and (windowp window) (setq window (window-child window))) | |
98 | (while (window-next window) | |
99 | (setq window (window-next window)))) | |
100 | window) | |
101 | ||
102 | (defsubst window-any-p (object) | |
103 | "Return t if OBJECT denotes a live or internal window." | |
104 | (and (windowp object) | |
105 | (or (window-buffer object) (window-child object)) | |
106 | t)) | |
107 | ||
108 | ;; The following four functions should probably go to subr.el. | |
109 | (defsubst normalize-live-buffer (buffer-or-name) | |
110 | "Return buffer specified by BUFFER-OR-NAME. | |
111 | BUFFER-OR-NAME must be either a buffer or a string naming a live | |
112 | buffer and defaults to the current buffer." | |
113 | (cond | |
114 | ((not buffer-or-name) | |
115 | (current-buffer)) | |
116 | ((bufferp buffer-or-name) | |
117 | (if (buffer-live-p buffer-or-name) | |
118 | buffer-or-name | |
119 | (error "Buffer %s is not a live buffer" buffer-or-name))) | |
120 | ((get-buffer buffer-or-name)) | |
121 | (t | |
122 | (error "No such buffer %s" buffer-or-name)))) | |
123 | ||
124 | (defsubst normalize-live-frame (frame) | |
125 | "Return frame specified by FRAME. | |
126 | FRAME must be a live frame and defaults to the selected frame." | |
127 | (if frame | |
128 | (if (frame-live-p frame) | |
129 | frame | |
130 | (error "%s is not a live frame" frame)) | |
131 | (selected-frame))) | |
132 | ||
133 | (defsubst normalize-any-window (window) | |
134 | "Return window specified by WINDOW. | |
135 | WINDOW must be a window that has not been deleted and defaults to | |
136 | the selected window." | |
137 | (if window | |
138 | (if (window-any-p window) | |
139 | window | |
140 | (error "%s is not a window" window)) | |
141 | (selected-window))) | |
142 | ||
143 | (defsubst normalize-live-window (window) | |
144 | "Return live window specified by WINDOW. | |
145 | WINDOW must be a live window and defaults to the selected one." | |
146 | (if window | |
147 | (if (and (windowp window) (window-buffer window)) | |
148 | window | |
149 | (error "%s is not a live window" window)) | |
150 | (selected-window))) | |
151 | ||
152 | (defvar ignore-window-parameters nil | |
153 | "If non-nil, standard functions ignore window parameters. | |
154 | The functions currently affected by this are `split-window', | |
155 | `delete-window', `delete-other-windows' and `other-window'. | |
156 | ||
157 | An application may bind this to a non-nil value around calls to | |
158 | these functions to inhibit processing of window parameters.") | |
159 | ||
a1511caf MR |
160 | (defconst window-safe-min-height 1 |
161 | "The absolut minimum number of lines of a window. | |
162 | Anything less might crash Emacs.") | |
163 | ||
562dd5e9 MR |
164 | (defcustom window-min-height 4 |
165 | "The minimum number of lines of any window. | |
166 | The value has to accomodate a mode- or header-line if present. A | |
167 | value less than `window-safe-min-height' is ignored. The value | |
168 | of this variable is honored when windows are resized or split. | |
169 | ||
170 | Applications should never rebind this variable. To resize a | |
171 | window to a height less than the one specified here, an | |
172 | application should instead call `resize-window' with a non-nil | |
173 | IGNORE argument. In order to have `split-window' make a window | |
174 | shorter, explictly specify the SIZE argument of that function." | |
175 | :type 'integer | |
176 | :version "24.1" | |
177 | :group 'windows) | |
178 | ||
a1511caf MR |
179 | (defconst window-safe-min-width 2 |
180 | "The absolut minimum number of columns of a window. | |
181 | Anything less might crash Emacs.") | |
182 | ||
562dd5e9 MR |
183 | (defcustom window-min-width 10 |
184 | "The minimum number of columns of any window. | |
185 | The value has to accomodate margins, fringes, or scrollbars if | |
186 | present. A value less than `window-safe-min-width' is ignored. | |
187 | The value of this variable is honored when windows are resized or | |
188 | split. | |
189 | ||
190 | Applications should never rebind this variable. To resize a | |
191 | window to a width less than the one specified here, an | |
192 | application should instead call `resize-window' with a non-nil | |
193 | IGNORE argument. In order to have `split-window' make a window | |
194 | narrower, explictly specify the SIZE argument of that function." | |
195 | :type 'integer | |
196 | :version "24.1" | |
197 | :group 'windows) | |
198 | ||
85cc1f11 MR |
199 | (defun window-iso-combination-p (&optional window horizontal) |
200 | "If WINDOW is a vertical combination return WINDOW's first child. | |
201 | WINDOW can be any window and defaults to the selected one. | |
202 | Optional argument HORIZONTAL non-nil means return WINDOW's first | |
203 | child if WINDOW is a horizontal combination." | |
204 | (setq window (normalize-any-window window)) | |
205 | (if horizontal | |
206 | (window-hchild window) | |
207 | (window-vchild window))) | |
208 | ||
209 | (defsubst window-iso-combined-p (&optional window horizontal) | |
210 | "Return non-nil if and only if WINDOW is vertically combined. | |
211 | WINDOW can be any window and defaults to the selected one. | |
212 | Optional argument HORIZONTAL non-nil means return non-nil if and | |
213 | only if WINDOW is horizontally combined." | |
214 | (setq window (normalize-any-window window)) | |
215 | (let ((parent (window-parent window))) | |
216 | (and parent (window-iso-combination-p parent horizontal)))) | |
217 | ||
218 | (defun window-iso-combinations (&optional window horizontal) | |
219 | "Return largest number of vertically arranged subwindows of WINDOW. | |
220 | WINDOW can be any window and defaults to the selected one. | |
221 | Optional argument HORIZONTAL non-nil means to return the largest | |
222 | number of horizontally arranged subwindows of WINDOW." | |
223 | (setq window (normalize-any-window window)) | |
224 | (cond | |
225 | ((window-live-p window) | |
226 | ;; If WINDOW is live, return 1. | |
227 | 1) | |
228 | ((window-iso-combination-p window horizontal) | |
229 | ;; If WINDOW is iso-combined, return the sum of the values for all | |
230 | ;; subwindows of WINDOW. | |
231 | (let ((child (window-child window)) | |
232 | (count 0)) | |
233 | (while child | |
234 | (setq count | |
235 | (+ (window-iso-combinations child horizontal) | |
236 | count)) | |
237 | (setq child (window-right child))) | |
238 | count)) | |
239 | (t | |
240 | ;; If WINDOW is not iso-combined, return the maximum value of any | |
241 | ;; subwindow of WINDOW. | |
242 | (let ((child (window-child window)) | |
243 | (count 1)) | |
244 | (while child | |
245 | (setq count | |
246 | (max (window-iso-combinations child horizontal) | |
247 | count)) | |
248 | (setq child (window-right child))) | |
249 | count)))) | |
250 | ||
251 | (defun walk-window-tree-1 (proc walk-window-tree-window any &optional sub-only) | |
252 | "Helper function for `walk-window-tree' and `walk-window-subtree'." | |
253 | (let (walk-window-tree-buffer) | |
254 | (while walk-window-tree-window | |
255 | (setq walk-window-tree-buffer | |
256 | (window-buffer walk-window-tree-window)) | |
257 | (when (or walk-window-tree-buffer any) | |
258 | (funcall proc walk-window-tree-window)) | |
259 | (unless walk-window-tree-buffer | |
260 | (walk-window-tree-1 | |
261 | proc (window-hchild walk-window-tree-window) any) | |
262 | (walk-window-tree-1 | |
263 | proc (window-vchild walk-window-tree-window) any)) | |
264 | (if sub-only | |
265 | (setq walk-window-tree-window nil) | |
266 | (setq walk-window-tree-window | |
267 | (window-right walk-window-tree-window)))))) | |
268 | ||
269 | (defun walk-window-tree (proc &optional frame any) | |
270 | "Run function PROC on each live window of FRAME. | |
271 | PROC must be a function with one argument - a window. FRAME must | |
272 | be a live frame and defaults to the selected one. ANY, if | |
273 | non-nil means to run PROC on all live and internal windows of | |
274 | FRAME. | |
275 | ||
276 | This function performs a pre-order, depth-first traversal of the | |
277 | window tree. If PROC changes the window tree, the result is | |
278 | unpredictable." | |
279 | (let ((walk-window-tree-frame (normalize-live-frame frame))) | |
280 | (walk-window-tree-1 | |
281 | proc (frame-root-window walk-window-tree-frame) any))) | |
282 | ||
283 | (defun walk-window-subtree (proc &optional window any) | |
284 | "Run function PROC on each live subwindow of WINDOW. | |
285 | WINDOW defaults to the selected window. PROC must be a function | |
286 | with one argument - a window. ANY, if non-nil means to run PROC | |
287 | on all live and internal subwindows of WINDOW. | |
288 | ||
289 | This function performs a pre-order, depth-first traversal of the | |
290 | window tree rooted at WINDOW. If PROC changes that window tree, | |
291 | the result is unpredictable." | |
292 | (setq window (normalize-any-window window)) | |
293 | (walk-window-tree-1 proc window any t)) | |
294 | ||
295 | (defun windows-with-parameter (parameter &optional value frame any values) | |
296 | "Return a list of all windows on FRAME with PARAMETER non-nil. | |
297 | FRAME defaults to the selected frame. Optional argument VALUE | |
298 | non-nil means only return windows whose window-parameter value of | |
299 | PARAMETER equals VALUE \(comparison is done using `equal'). | |
300 | Optional argument ANY non-nil means consider internal windows | |
301 | too. Optional argument VALUES non-nil means return a list of cons | |
302 | cells whose car is the value of the parameter and whose cdr is | |
303 | the window." | |
304 | (let (this-value windows) | |
305 | (walk-window-tree | |
306 | (lambda (window) | |
307 | (when (and (setq this-value (window-parameter window parameter)) | |
308 | (or (not value) (or (equal value this-value)))) | |
309 | (setq windows | |
310 | (if values | |
311 | (cons (cons this-value window) windows) | |
312 | (cons window windows))))) | |
313 | frame any) | |
314 | ||
315 | (nreverse windows))) | |
316 | ||
317 | (defun window-with-parameter (parameter &optional value frame any) | |
318 | "Return first window on FRAME with PARAMETER non-nil. | |
319 | FRAME defaults to the selected frame. Optional argument VALUE | |
320 | non-nil means only return a window whose window-parameter value | |
321 | for PARAMETER equals VALUE \(comparison is done with `equal'). | |
322 | Optional argument ANY non-nil means consider internal windows | |
323 | too." | |
324 | (let (this-value windows) | |
325 | (catch 'found | |
326 | (walk-window-tree | |
327 | (lambda (window) | |
328 | (when (and (setq this-value (window-parameter window parameter)) | |
329 | (or (not value) (equal value this-value))) | |
330 | (throw 'found window))) | |
331 | frame any)))) | |
332 | ||
333 | ;;; Atomic windows. | |
334 | (defun window-atom-root (&optional window) | |
335 | "Return root of atomic window WINDOW is a part of. | |
336 | WINDOW can be any window and defaults to the selected one. | |
337 | Return nil if WINDOW is not part of a atomic window." | |
338 | (setq window (normalize-any-window window)) | |
339 | (let (root) | |
340 | (while (and window (window-parameter window 'window-atom)) | |
341 | (setq root window) | |
342 | (setq window (window-parent window))) | |
343 | root)) | |
344 | ||
345 | (defun make-window-atom (window) | |
346 | "Make WINDOW an atomic window. | |
347 | WINDOW must be an internal window. Return WINDOW." | |
348 | (if (not (window-child window)) | |
349 | (error "Window %s is not an internal window" window) | |
350 | (walk-window-subtree | |
351 | (lambda (window) | |
352 | (set-window-parameter window 'window-atom t)) | |
353 | window t) | |
354 | window)) | |
355 | ||
356 | (defun window-atom-check-1 (window) | |
357 | "Subroutine of `window-atom-check'." | |
358 | (when window | |
359 | (if (window-parameter window 'window-atom) | |
360 | (let ((count 0)) | |
361 | (when (or (catch 'reset | |
362 | (walk-window-subtree | |
363 | (lambda (window) | |
364 | (if (window-parameter window 'window-atom) | |
365 | (setq count (1+ count)) | |
366 | (throw 'reset t))) | |
367 | window t)) | |
368 | ;; count >= 1 must hold here. If there's no other | |
369 | ;; window around dissolve this atomic window. | |
370 | (= count 1)) | |
371 | ;; Dissolve atomic window. | |
372 | (walk-window-subtree | |
373 | (lambda (window) | |
374 | (set-window-parameter window 'window-atom nil)) | |
375 | window t))) | |
376 | ;; Check children. | |
377 | (unless (window-buffer window) | |
378 | (window-atom-check-1 (window-hchild window)) | |
379 | (window-atom-check-1 (window-vchild window)))) | |
380 | ;; Check right sibling | |
381 | (window-atom-check-1 (window-right window)))) | |
382 | ||
383 | (defun window-atom-check (&optional frame) | |
384 | "Check atomicity of all windows on FRAME. | |
385 | FRAME defaults to the selected frame. If an atomic window is | |
386 | wrongly configured, reset the atomicity of all its subwindows to | |
387 | nil. An atomic window is wrongly configured if it has no | |
388 | subwindows or one of its subwindows is not atomic." | |
389 | (window-atom-check-1 (frame-root-window frame))) | |
390 | ||
391 | ;; Side windows. | |
392 | (defvar window-sides '(left top right bottom) | |
393 | "Window sides.") | |
394 | ||
395 | (defcustom window-sides-vertical nil | |
396 | "If non-nil, left and right side windows are full height. | |
397 | Otherwise, top and bottom side windows are full width." | |
398 | :type 'boolean | |
399 | :group 'windows | |
400 | :version "24.1") | |
401 | ||
402 | (defcustom window-sides-slots '(nil nil nil nil) | |
403 | "Maximum number of side window slots. | |
404 | The value is a list of four elements specifying the number of | |
405 | side window slots on \(in this order) the left, top, right and | |
406 | bottom side of each frame. If an element is a number, this means | |
407 | to display at most that many side windows on the corresponding | |
408 | side. If an element is nil, this means there's no bound on the | |
409 | number of slots on that side." | |
410 | :risky t | |
411 | :type | |
412 | '(list | |
413 | :value (nil nil nil nil) | |
414 | (choice | |
415 | :tag "Left" | |
416 | :help-echo "Maximum slots of left side window." | |
417 | :value nil | |
418 | :format "%[Left%] %v\n" | |
419 | (const :tag "Unlimited" :format "%t" nil) | |
420 | (integer :tag "Number" :value 2 :size 5)) | |
421 | (choice | |
422 | :tag "Top" | |
423 | :help-echo "Maximum slots of top side window." | |
424 | :value nil | |
425 | :format "%[Top%] %v\n" | |
426 | (const :tag "Unlimited" :format "%t" nil) | |
427 | (integer :tag "Number" :value 3 :size 5)) | |
428 | (choice | |
429 | :tag "Right" | |
430 | :help-echo "Maximum slots of right side window." | |
431 | :value nil | |
432 | :format "%[Right%] %v\n" | |
433 | (const :tag "Unlimited" :format "%t" nil) | |
434 | (integer :tag "Number" :value 2 :size 5)) | |
435 | (choice | |
436 | :tag "Bottom" | |
437 | :help-echo "Maximum slots of bottom side window." | |
438 | :value nil | |
439 | :format "%[Bottom%] %v\n" | |
440 | (const :tag "Unlimited" :format "%t" nil) | |
441 | (integer :tag "Number" :value 3 :size 5))) | |
442 | :group 'windows) | |
443 | ||
444 | (defun window-side-check (&optional frame) | |
445 | "Check the window-side parameter of all windows on FRAME. | |
446 | FRAME defaults to the selected frame. If the configuration is | |
447 | invalid, reset all window-side parameters to nil. | |
448 | ||
449 | A valid configuration has to preserve the following invariant: | |
450 | ||
451 | - If a window has a non-nil window-side parameter, it must have a | |
452 | parent window and the parent window's window-side parameter | |
453 | must be either nil or the same as for window. | |
454 | ||
455 | - If windows with non-nil window-side parameters exist, there | |
456 | must be at most one window of each side and non-side with a | |
457 | parent whose window-side parameter is nil and there must be no | |
458 | leaf window whose window-side parameter is nil." | |
459 | (let (normal none left top right bottom | |
460 | side parent parent-side code) | |
461 | (when (or (catch 'reset | |
462 | (walk-window-tree | |
463 | (lambda (window) | |
464 | (setq side (window-parameter window 'window-side)) | |
465 | (setq parent (window-parent window)) | |
466 | (setq parent-side | |
467 | (and parent (window-parameter parent 'window-side))) | |
468 | ;; The following `cond' seems a bit tedious, but I'd | |
469 | ;; rather stick to using just the stack. | |
470 | (cond | |
471 | (parent-side | |
472 | (when (not (eq parent-side side)) | |
473 | ;; A parent whose window-side is non-nil must | |
474 | ;; have a child with the same window-side. | |
475 | (throw 'reset t))) | |
476 | ;; Now check that there's more than one main window | |
477 | ;; for any of none, left, top, right and bottom. | |
478 | ((eq side 'none) | |
479 | (if none | |
480 | (throw 'reset t) | |
481 | (setq none t))) | |
482 | ((eq side 'left) | |
483 | (if left | |
484 | (throw 'reset t) | |
485 | (setq left t))) | |
486 | ((eq side 'top) | |
487 | (if top | |
488 | (throw 'reset t) | |
489 | (setq top t))) | |
490 | ((eq side 'right) | |
491 | (if right | |
492 | (throw 'reset t) | |
493 | (setq right t))) | |
494 | ((eq side 'bottom) | |
495 | (if bottom | |
496 | (throw 'reset t) | |
497 | (setq bottom t))) | |
498 | ((window-buffer window) | |
499 | ;; A leaf window without window-side parameter, | |
500 | ;; record its existence. | |
501 | (setq normal t)))) | |
502 | frame t)) | |
503 | (if none | |
504 | ;; At least one non-side window exists, so there must | |
505 | ;; be at least one side-window and no normal window. | |
506 | (or (not (or left top right bottom)) normal) | |
507 | ;; No non-side window exists, so there must be no side | |
508 | ;; window either. | |
509 | (or left top right bottom))) | |
510 | (walk-window-tree | |
511 | (lambda (window) | |
512 | (set-window-parameter window 'window-side nil)) | |
513 | frame t)))) | |
514 | ||
515 | (defun window-check (&optional frame) | |
516 | "Check atomic and side windows on FRAME. | |
517 | FRAME defaults to the selected frame." | |
518 | (window-side-check frame) | |
519 | (window-atom-check frame)) | |
520 | ||
521 | ;;; Window sizes. | |
522 | (defvar window-size-fixed nil | |
523 | "Non-nil in a buffer means windows displaying the buffer are fixed-size. | |
524 | If the value is `height', then only the window's height is fixed. | |
525 | If the value is `width', then only the window's width is fixed. | |
526 | Any other non-nil value fixes both the width and the height. | |
527 | ||
528 | Emacs won't change the size of any window displaying that buffer, | |
529 | unless it has no other choice \(like when deleting a neighboring | |
530 | window).") | |
531 | (make-variable-buffer-local 'window-size-fixed) | |
532 | ||
a1511caf MR |
533 | (defsubst window-size-ignore (window ignore) |
534 | "Return non-nil if IGNORE says to ignore size restrictions for WINDOW." | |
535 | (if (window-any-p ignore) (eq window ignore) ignore)) | |
536 | ||
537 | (defun window-min-size (&optional window horizontal ignore) | |
538 | "Return the minimum number of lines of WINDOW. | |
539 | WINDOW can be an arbitrary window and defaults to the selected | |
540 | one. Optional argument HORIZONTAL non-nil means return the | |
541 | minimum number of columns of WINDOW. | |
542 | ||
543 | Optional argument IGNORE non-nil means ignore any restrictions | |
544 | imposed by fixed size windows, `window-min-height' or | |
545 | `window-min-width' settings. IGNORE equal `safe' means live | |
546 | windows may get as small as `window-safe-min-height' lines and | |
547 | `window-safe-min-width' columns. IGNORE a window means ignore | |
548 | restrictions for that window only." | |
549 | (window-min-size-1 | |
550 | (normalize-any-window window) horizontal ignore)) | |
551 | ||
552 | (defun window-min-size-1 (window horizontal ignore) | |
553 | "Internal function of `window-min-size'." | |
554 | (let ((sub (window-child window))) | |
555 | (if sub | |
556 | (let ((value 0)) | |
557 | ;; WINDOW is an internal window. | |
558 | (if (window-iso-combined-p sub horizontal) | |
559 | ;; The minimum size of an iso-combination is the sum of | |
560 | ;; the minimum sizes of its subwindows. | |
561 | (while sub | |
562 | (setq value (+ value | |
563 | (window-min-size-1 sub horizontal ignore))) | |
564 | (setq sub (window-right sub))) | |
565 | ;; The minimum size of an ortho-combination is the maximum of | |
566 | ;; the minimum sizes of its subwindows. | |
567 | (while sub | |
568 | (setq value (max value | |
569 | (window-min-size-1 sub horizontal ignore))) | |
570 | (setq sub (window-right sub)))) | |
571 | value) | |
572 | (with-current-buffer (window-buffer window) | |
573 | (cond | |
574 | ((and (not (window-size-ignore window ignore)) | |
575 | (window-size-fixed-p window horizontal)) | |
576 | ;; The minimum size of a fixed size window is its size. | |
577 | (window-total-size window horizontal)) | |
578 | ((or (eq ignore 'safe) (eq ignore window)) | |
579 | ;; If IGNORE equals `safe' or WINDOW return the safe values. | |
580 | (if horizontal window-safe-min-width window-safe-min-height)) | |
581 | (horizontal | |
582 | ;; For the minimum width of a window take fringes and | |
583 | ;; scroll-bars into account. This is questionable and should | |
584 | ;; be removed as soon as we are able to split (and resize) | |
585 | ;; windows such that the new (or resized) windows can get a | |
586 | ;; size less than the user-specified `window-min-height' and | |
587 | ;; `window-min-width'. | |
588 | (let ((frame (window-frame window)) | |
589 | (fringes (window-fringes window)) | |
590 | (scroll-bars (window-scroll-bars window))) | |
591 | (max | |
592 | (+ window-safe-min-width | |
593 | (ceiling (car fringes) (frame-char-width frame)) | |
594 | (ceiling (cadr fringes) (frame-char-width frame)) | |
595 | (cond | |
596 | ((memq (nth 2 scroll-bars) '(left right)) | |
597 | (nth 1 scroll-bars)) | |
598 | ((memq (frame-parameter frame 'vertical-scroll-bars) | |
599 | '(left right)) | |
600 | (ceiling (or (frame-parameter frame 'scroll-bar-width) 14) | |
601 | (frame-char-width))) | |
602 | (t 0))) | |
603 | (if (and (not (window-size-ignore window ignore)) | |
604 | (numberp window-min-width)) | |
605 | window-min-width | |
606 | 0)))) | |
607 | (t | |
608 | ;; For the minimum height of a window take any mode- or | |
609 | ;; header-line into account. | |
610 | (max (+ window-safe-min-height | |
611 | (if header-line-format 1 0) | |
612 | (if mode-line-format 1 0)) | |
613 | (if (and (not (window-size-ignore window ignore)) | |
614 | (numberp window-min-height)) | |
615 | window-min-height | |
616 | 0)))))))) | |
617 | ||
618 | (defun window-sizable (window delta &optional horizontal ignore) | |
619 | "Return DELTA if DELTA lines can be added to WINDOW. | |
620 | Optional argument HORIZONTAL non-nil means return DELTA if DELTA | |
621 | columns can be added to WINDOW. A return value of zero means | |
622 | that no lines (or columns) can be added to WINDOW. | |
623 | ||
624 | This function looks only at WINDOW and its subwindows. The | |
625 | function `window-resizable' looks at other windows as well. | |
626 | ||
627 | DELTA positive means WINDOW shall be enlarged by DELTA lines or | |
628 | columns. If WINDOW cannot be enlarged by DELTA lines or columns | |
629 | return the maximum value in the range 0..DELTA by which WINDOW | |
630 | can be enlarged. | |
631 | ||
632 | DELTA negative means WINDOW shall be shrunk by -DELTA lines or | |
633 | columns. If WINDOW cannot be shrunk by -DELTA lines or columns, | |
634 | return the minimum value in the range DELTA..0 by which WINDOW | |
635 | can be shrunk. | |
636 | ||
637 | Optional argument IGNORE non-nil means ignore any restrictions | |
638 | imposed by fixed size windows, `window-min-height' or | |
639 | `window-min-width' settings. IGNORE equal `safe' means live | |
640 | windows may get as small as `window-safe-min-height' lines and | |
641 | `window-safe-min-width' columns. IGNORE any window means ignore | |
642 | restrictions for that window only." | |
643 | (setq window (normalize-any-window window)) | |
644 | (cond | |
645 | ((< delta 0) | |
646 | (max (- (window-min-size window horizontal ignore) | |
647 | (window-total-size window horizontal)) | |
648 | delta)) | |
649 | ((window-size-ignore window ignore) | |
650 | delta) | |
651 | ((> delta 0) | |
652 | (if (window-size-fixed-p window horizontal) | |
653 | 0 | |
654 | delta)) | |
655 | (t 0))) | |
656 | ||
657 | (defsubst window-sizable-p (window delta &optional horizontal ignore) | |
658 | "Return t if WINDOW can be resized by DELTA lines. | |
659 | For the meaning of the arguments of this function see the | |
660 | doc-string of `window-sizable'." | |
661 | (setq window (normalize-any-window window)) | |
662 | (if (> delta 0) | |
663 | (>= (window-sizable window delta horizontal ignore) delta) | |
664 | (<= (window-sizable window delta horizontal ignore) delta))) | |
665 | ||
666 | (defun window-size-fixed-1 (window horizontal) | |
667 | "Internal function for `window-size-fixed-p'." | |
668 | (let ((sub (window-child window))) | |
669 | (catch 'fixed | |
670 | (if sub | |
671 | ;; WINDOW is an internal window. | |
672 | (if (window-iso-combined-p sub horizontal) | |
673 | ;; An iso-combination is fixed size if all its subwindows | |
674 | ;; are fixed-size. | |
675 | (progn | |
676 | (while sub | |
677 | (unless (window-size-fixed-1 sub horizontal) | |
678 | ;; We found a non-fixed-size subwindow, so WINDOW's | |
679 | ;; size is not fixed. | |
680 | (throw 'fixed nil)) | |
681 | (setq sub (window-right sub))) | |
682 | ;; All subwindows are fixed-size, so WINDOW's size is | |
683 | ;; fixed. | |
684 | (throw 'fixed t)) | |
685 | ;; An ortho-combination is fixed-size if at least one of its | |
686 | ;; subwindows is fixed-size. | |
687 | (while sub | |
688 | (when (window-size-fixed-1 sub horizontal) | |
689 | ;; We found a fixed-size subwindow, so WINDOW's size is | |
690 | ;; fixed. | |
691 | (throw 'fixed t)) | |
692 | (setq sub (window-right sub)))) | |
693 | ;; WINDOW is a live window. | |
694 | (with-current-buffer (window-buffer window) | |
695 | (if horizontal | |
696 | (memq window-size-fixed '(width t)) | |
697 | (memq window-size-fixed '(height t)))))))) | |
698 | ||
699 | (defun window-size-fixed-p (&optional window horizontal) | |
700 | "Return non-nil if WINDOW's height is fixed. | |
701 | WINDOW can be an arbitrary window and defaults to the selected | |
702 | window. Optional argument HORIZONTAL non-nil means return | |
703 | non-nil if WINDOW's width is fixed. | |
704 | ||
705 | If this function returns nil, this does not necessarily mean that | |
706 | WINDOW can be resized in the desired direction. The functions | |
707 | `window-resizable' and `window-resizable-p' will tell that." | |
708 | (window-size-fixed-1 | |
709 | (normalize-any-window window) horizontal)) | |
710 | ||
711 | (defun window-min-delta-1 (window delta &optional horizontal ignore trail noup) | |
712 | "Internal function for `window-min-delta'." | |
713 | (if (not (window-parent window)) | |
714 | ;; If we can't go up, return zero. | |
715 | 0 | |
716 | ;; Else try to find a non-fixed-size sibling of WINDOW. | |
717 | (let* ((parent (window-parent window)) | |
718 | (sub (window-child parent))) | |
719 | (catch 'done | |
720 | (if (window-iso-combined-p sub horizontal) | |
721 | ;; In an iso-combination throw DELTA if we find at least one | |
722 | ;; subwindow and that subwindow is either not of fixed-size | |
723 | ;; or we can ignore fixed-sizeness. | |
724 | (let ((skip (eq trail 'after))) | |
725 | (while sub | |
726 | (cond | |
727 | ((eq sub window) | |
728 | (setq skip (eq trail 'before))) | |
729 | (skip) | |
730 | ((and (not (window-size-ignore window ignore)) | |
731 | (window-size-fixed-p sub horizontal))) | |
732 | (t | |
733 | ;; We found a non-fixed-size subwindow. | |
734 | (throw 'done delta))) | |
735 | (setq sub (window-right sub)))) | |
736 | ;; In an ortho-combination set DELTA to the minimum value by | |
737 | ;; which other subwindows can shrink. | |
738 | (while sub | |
739 | (unless (eq sub window) | |
740 | (setq delta | |
741 | (min delta | |
742 | (- (window-total-size sub horizontal) | |
743 | (window-min-size sub horizontal ignore))))) | |
744 | (setq sub (window-right sub)))) | |
745 | (if noup | |
746 | delta | |
747 | (window-min-delta-1 parent delta horizontal ignore trail)))))) | |
748 | ||
749 | (defun window-min-delta (&optional window horizontal ignore trail noup nodown) | |
750 | "Return number of lines by which WINDOW can be shrunk. | |
751 | WINDOW can be an arbitrary window and defaults to the selected | |
752 | window. Return zero if WINDOW cannot be shrunk. | |
753 | ||
754 | Optional argument HORIZONTAL non-nil means return number of | |
755 | columns by which WINDOW can be shrunk. | |
756 | ||
757 | Optional argument IGNORE non-nil means ignore any restrictions | |
758 | imposed by fixed size windows, `window-min-height' or | |
759 | `window-min-width' settings. IGNORE a window means ignore | |
760 | restrictions for that window only. IGNORE equal `safe' means | |
761 | live windows may get as small as `window-safe-min-height' lines | |
762 | and `window-safe-min-width' columns. | |
763 | ||
764 | Optional argument TRAIL `before' means only windows to the left | |
765 | of or above WINDOW can be enlarged. Optional argument TRAIL | |
766 | `after' means only windows to the right of or below WINDOW can be | |
767 | enlarged. | |
768 | ||
769 | Optional argument NOUP non-nil means don't go up in the window | |
770 | tree but try to enlarge windows within WINDOW's combination only. | |
771 | ||
772 | Optional argument NODOWN non-nil means don't check whether WINDOW | |
773 | itself \(and its subwindows) can be shrunk; check only whether at | |
774 | least one other windows can be enlarged appropriately." | |
775 | (setq window (normalize-any-window window)) | |
776 | (let ((size (window-total-size window horizontal)) | |
777 | (minimum (window-min-size window horizontal ignore))) | |
778 | (cond | |
779 | (nodown | |
780 | ;; If NODOWN is t, try to recover the entire size of WINDOW. | |
781 | (window-min-delta-1 window size horizontal ignore trail noup)) | |
782 | ((= size minimum) | |
783 | ;; If NODOWN is nil and WINDOW's size is already at its minimum, | |
784 | ;; there's nothing to recover. | |
785 | 0) | |
786 | (t | |
787 | ;; Otherwise, try to recover whatever WINDOW is larger than its | |
788 | ;; minimum size. | |
789 | (window-min-delta-1 | |
790 | window (- size minimum) horizontal ignore trail noup))))) | |
791 | ||
792 | (defun window-max-delta-1 (window delta &optional horizontal ignore trail noup) | |
793 | "Internal function of `window-max-delta'." | |
794 | (if (not (window-parent window)) | |
795 | ;; Can't go up. Return DELTA. | |
796 | delta | |
797 | (let* ((parent (window-parent window)) | |
798 | (sub (window-child parent))) | |
799 | (catch 'fixed | |
800 | (if (window-iso-combined-p sub horizontal) | |
801 | ;; For an iso-combination calculate how much we can get from | |
802 | ;; other subwindows. | |
803 | (let ((skip (eq trail 'after))) | |
804 | (while sub | |
805 | (cond | |
806 | ((eq sub window) | |
807 | (setq skip (eq trail 'before))) | |
808 | (skip) | |
809 | (t | |
810 | (setq delta | |
811 | (+ delta | |
812 | (- (window-total-size sub horizontal) | |
813 | (window-min-size sub horizontal ignore)))))) | |
814 | (setq sub (window-right sub)))) | |
815 | ;; For an ortho-combination throw DELTA when at least one | |
816 | ;; subwindow is fixed-size. | |
817 | (while sub | |
818 | (when (and (not (eq sub window)) | |
819 | (not (window-size-ignore sub ignore)) | |
820 | (window-size-fixed-p sub horizontal)) | |
821 | (throw 'fixed delta)) | |
822 | (setq sub (window-right sub)))) | |
823 | (if noup | |
824 | ;; When NOUP is nil, DELTA is all we can get. | |
825 | delta | |
826 | ;; Else try with parent of WINDOW, passing the DELTA we | |
827 | ;; recovered so far. | |
828 | (window-max-delta-1 parent delta horizontal ignore trail)))))) | |
829 | ||
830 | (defun window-max-delta (&optional window horizontal ignore trail noup nodown) | |
831 | "Return maximum number of lines WINDOW by which WINDOW can be enlarged. | |
832 | WINDOW can be an arbitrary window and defaults to the selected | |
833 | window. The return value is zero if WINDOW cannot be enlarged. | |
834 | ||
835 | Optional argument HORIZONTAL non-nil means return maximum number | |
836 | of columns by which WINDOW can be enlarged. | |
837 | ||
838 | Optional argument IGNORE non-nil means ignore any restrictions | |
839 | imposed by fixed size windows, `window-min-height' or | |
840 | `window-min-width' settings. IGNORE a window means ignore | |
841 | restrictions for that window only. IGNORE equal `safe' means | |
842 | live windows may get as small as `window-safe-min-height' lines | |
843 | and `window-safe-min-width' columns. | |
844 | ||
845 | Optional argument TRAIL `before' means only windows to the left | |
846 | of or below WINDOW can be shrunk. Optional argument TRAIL | |
847 | `after' means only windows to the right of or above WINDOW can be | |
848 | shrunk. | |
849 | ||
850 | Optional argument NOUP non-nil means don't go up in the window | |
851 | tree but try to obtain the entire space from windows within | |
852 | WINDOW's combination. | |
853 | ||
854 | Optional argument NODOWN non-nil means do not check whether | |
855 | WINDOW itself \(and its subwindows) can be enlarged; check only | |
856 | whether other windows can be shrunk appropriately." | |
857 | (setq window (normalize-any-window window)) | |
858 | (if (and (not (window-size-ignore window ignore)) | |
859 | (not nodown) (window-size-fixed-p window horizontal)) | |
860 | ;; With IGNORE and NOWDON nil return zero if WINDOW has fixed | |
861 | ;; size. | |
862 | 0 | |
863 | ;; WINDOW has no fixed size. | |
864 | (window-max-delta-1 window 0 horizontal ignore trail noup))) | |
865 | ||
866 | ;; Make NOUP also inhibit the min-size check. | |
867 | (defun window-resizable (window delta &optional horizontal ignore trail noup nodown) | |
868 | "Return DELTA if WINDOW can be resized vertically by DELTA lines. | |
869 | Optional argument HORIZONTAL non-nil means return DELTA if WINDOW | |
870 | can be resized horizontally by DELTA columns. A return value of | |
871 | zero means that WINDOW is not resizable. | |
872 | ||
873 | DELTA positive means WINDOW shall be enlarged by DELTA lines or | |
874 | columns. If WINDOW cannot be enlarged by DELTA lines or columns | |
875 | return the maximum value in the range 0..DELTA by which WINDOW | |
876 | can be enlarged. | |
877 | ||
878 | DELTA negative means WINDOW shall be shrunk by -DELTA lines or | |
879 | columns. If WINDOW cannot be shrunk by -DELTA lines or columns, | |
880 | return the minimum value in the range DELTA..0 that can be used | |
881 | for shrinking WINDOW. | |
882 | ||
883 | Optional argument IGNORE non-nil means ignore any restrictions | |
884 | imposed by fixed size windows, `window-min-height' or | |
885 | `window-min-width' settings. IGNORE a window means ignore | |
886 | restrictions for that window only. IGNORE equal `safe' means | |
887 | live windows may get as small as `window-safe-min-height' lines | |
888 | and `window-safe-min-width' columns. | |
889 | ||
890 | Optional argument TRAIL `before' means only windows to the left | |
891 | of or below WINDOW can be shrunk. Optional argument TRAIL | |
892 | `after' means only windows to the right of or above WINDOW can be | |
893 | shrunk. | |
894 | ||
895 | Optional argument NOUP non-nil means don't go up in the window | |
896 | tree but try to distribute the space among the other windows | |
897 | within WINDOW's combination. | |
898 | ||
899 | Optional argument NODOWN non-nil means don't check whether WINDOW | |
900 | and its subwindows can be resized." | |
901 | (setq window (normalize-any-window window)) | |
902 | (cond | |
903 | ((< delta 0) | |
904 | (max (- (window-min-delta window horizontal ignore trail noup nodown)) | |
905 | delta)) | |
906 | ((> delta 0) | |
907 | (min (window-max-delta window horizontal ignore trail noup nodown) | |
908 | delta)) | |
909 | (t 0))) | |
910 | ||
911 | (defun window-resizable-p (window delta &optional horizontal ignore trail noup nodown) | |
912 | "Return t if WINDOW can be resized vertically by DELTA lines. | |
913 | For the meaning of the arguments of this function see the | |
914 | doc-string of `window-resizable'." | |
915 | (setq window (normalize-any-window window)) | |
916 | (if (> delta 0) | |
917 | (>= (window-resizable window delta horizontal ignore trail noup nodown) | |
918 | delta) | |
919 | (<= (window-resizable window delta horizontal ignore trail noup nodown) | |
920 | delta))) | |
921 | ||
922 | (defsubst window-total-height (&optional window) | |
923 | "Return the total number of lines of WINDOW. | |
924 | WINDOW can be any window and defaults to the selected one. The | |
925 | return value includes WINDOW's mode line and header line, if any. | |
926 | If WINDOW is internal the return value is the sum of the total | |
927 | number of lines of WINDOW's child windows if these are vertically | |
928 | combined and the height of WINDOW's first child otherwise. | |
929 | ||
930 | Note: This function does not take into account the value of | |
931 | `line-spacing' when calculating the number of lines in WINDOW." | |
932 | (window-total-size window)) | |
3c448ab6 | 933 | |
f3d1777e MR |
934 | ;; Eventually we should make `window-height' obsolete. |
935 | (defalias 'window-height 'window-total-height) | |
936 | ||
ccafbf06 | 937 | ;; See discussion in bug#4543. |
a1511caf MR |
938 | (defsubst window-full-height-p (&optional window) |
939 | "Return t if WINDOW is as high as the containing frame. | |
940 | More precisely, return t if and only if the total height of | |
941 | WINDOW equals the total height of the root window of WINDOW's | |
942 | frame. WINDOW can be any window and defaults to the selected | |
943 | one." | |
944 | (setq window (normalize-any-window window)) | |
945 | (= (window-total-size window) | |
946 | (window-total-size (frame-root-window window)))) | |
947 | ||
948 | (defsubst window-total-width (&optional window) | |
949 | "Return the total number of columns of WINDOW. | |
950 | WINDOW can be any window and defaults to the selected one. The | |
951 | return value includes any vertical dividers or scrollbars of | |
952 | WINDOW. If WINDOW is internal, the return value is the sum of | |
953 | the total number of columns of WINDOW's child windows if these | |
954 | are horizontally combined and the width of WINDOW's first child | |
955 | otherwise." | |
956 | (window-total-size window t)) | |
957 | ||
958 | (defsubst window-full-width-p (&optional window) | |
959 | "Return t if WINDOW is as wide as the containing frame. | |
960 | More precisely, return t if and only if the total width of WINDOW | |
961 | equals the total width of the root window of WINDOW's frame. | |
962 | WINDOW can be any window and defaults to the selected one." | |
963 | (setq window (normalize-any-window window)) | |
964 | (= (window-total-size window t) | |
965 | (window-total-size (frame-root-window window) t))) | |
966 | ||
967 | (defsubst window-body-height (&optional window) | |
968 | "Return the number of lines of WINDOW's body. | |
969 | WINDOW must be a live window and defaults to the selected one. | |
970 | ||
971 | The return value does not include WINDOW's mode line and header | |
972 | line, if any. If a line at the bottom of the window is only | |
973 | partially visible, that line is included in the return value. If | |
974 | you do not want to include a partially visible bottom line in the | |
975 | return value, use `window-text-height' instead." | |
976 | (window-body-size window)) | |
977 | ||
978 | (defsubst window-body-width (&optional window) | |
979 | "Return the number of columns of WINDOW's body. | |
980 | WINDOW must be a live window and defaults to the selected one. | |
981 | ||
982 | The return value does not include any vertical dividers or scroll | |
983 | bars owned by WINDOW. On a window-system the return value does | |
984 | not include the number of columns used for WINDOW's fringes or | |
985 | display margins either." | |
986 | (window-body-size window t)) | |
02c6f098 | 987 | |
f3d1777e MR |
988 | ;; Eventually we should make `window-height' obsolete. |
989 | (defalias 'window-width 'window-body-width) | |
990 | ||
3c448ab6 MR |
991 | (defun window-current-scroll-bars (&optional window) |
992 | "Return the current scroll bar settings for WINDOW. | |
387522b2 | 993 | WINDOW must be a live window and defaults to the selected one. |
3c448ab6 MR |
994 | |
995 | The return value is a cons cell (VERTICAL . HORIZONTAL) where | |
996 | VERTICAL specifies the current location of the vertical scroll | |
997 | bars (`left', `right', or nil), and HORIZONTAL specifies the | |
998 | current location of the horizontal scroll bars (`top', `bottom', | |
999 | or nil). | |
1000 | ||
1001 | Unlike `window-scroll-bars', this function reports the scroll bar | |
1002 | type actually used, once frame defaults and `scroll-bar-mode' are | |
1003 | taken into account." | |
387522b2 | 1004 | (setq window (normalize-live-window window)) |
3c448ab6 MR |
1005 | (let ((vert (nth 2 (window-scroll-bars window))) |
1006 | (hor nil)) | |
1007 | (when (or (eq vert t) (eq hor t)) | |
387522b2 | 1008 | (let ((fcsb (frame-current-scroll-bars (window-frame window)))) |
3c448ab6 MR |
1009 | (if (eq vert t) |
1010 | (setq vert (car fcsb))) | |
1011 | (if (eq hor t) | |
1012 | (setq hor (cdr fcsb))))) | |
1013 | (cons vert hor))) | |
1014 | ||
1015 | (defun walk-windows (proc &optional minibuf all-frames) | |
387522b2 | 1016 | "Cycle through all live windows, calling PROC for each one. |
3c448ab6 MR |
1017 | PROC must specify a function with a window as its sole argument. |
1018 | The optional arguments MINIBUF and ALL-FRAMES specify the set of | |
387522b2 | 1019 | windows to include in the walk. |
3c448ab6 MR |
1020 | |
1021 | MINIBUF t means include the minibuffer window even if the | |
1022 | minibuffer is not active. MINIBUF nil or omitted means include | |
1023 | the minibuffer window only if the minibuffer is active. Any | |
1024 | other value means do not include the minibuffer window even if | |
1025 | the minibuffer is active. | |
1026 | ||
387522b2 MR |
1027 | ALL-FRAMES nil or omitted means consider all windows on the |
1028 | selected frame, plus the minibuffer window if specified by the | |
1029 | MINIBUF argument. If the minibuffer counts, consider all windows | |
1030 | on all frames that share that minibuffer too. The following | |
1031 | non-nil values of ALL-FRAMES have special meanings: | |
1032 | ||
1033 | - t means consider all windows on all existing frames. | |
1034 | ||
1035 | - `visible' means consider all windows on all visible frames on | |
1036 | the current terminal. | |
1037 | ||
1038 | - 0 (the number zero) means consider all windows on all visible | |
1039 | and iconified frames on the current terminal. | |
1040 | ||
1041 | - A frame means consider all windows on that frame only. | |
1042 | ||
1043 | Anything else means consider all windows on the selected frame | |
1044 | and no others. | |
3c448ab6 MR |
1045 | |
1046 | This function changes neither the order of recently selected | |
1047 | windows nor the buffer list." | |
1048 | ;; If we start from the minibuffer window, don't fail to come | |
1049 | ;; back to it. | |
1050 | (when (window-minibuffer-p (selected-window)) | |
1051 | (setq minibuf t)) | |
1052 | ;; Make sure to not mess up the order of recently selected | |
1053 | ;; windows. Use `save-selected-window' and `select-window' | |
1054 | ;; with second argument non-nil for this purpose. | |
1055 | (save-selected-window | |
1056 | (when (framep all-frames) | |
1057 | (select-window (frame-first-window all-frames) 'norecord)) | |
387522b2 MR |
1058 | (dolist (walk-windows-window (window-list-1 nil minibuf all-frames)) |
1059 | (funcall proc walk-windows-window)))) | |
1060 | ||
1061 | (defun window-in-direction-2 (window posn &optional horizontal) | |
1062 | "Support function for `window-in-direction'." | |
1063 | (if horizontal | |
1064 | (let ((top (window-top-line window))) | |
1065 | (if (> top posn) | |
1066 | (- top posn) | |
1067 | (- posn top (window-total-height window)))) | |
1068 | (let ((left (window-left-column window))) | |
1069 | (if (> left posn) | |
1070 | (- left posn) | |
1071 | (- posn left (window-total-width window)))))) | |
1072 | ||
1073 | (defun window-in-direction (direction &optional window ignore) | |
1074 | "Return window in DIRECTION as seen from WINDOW. | |
1075 | DIRECTION must be one of `above', `below', `left' or `right'. | |
1076 | WINDOW must be a live window and defaults to the selected one. | |
1077 | IGNORE, when non-nil means a window can be returned even if its | |
1078 | `no-other-window' parameter is non-nil." | |
1079 | (setq window (normalize-live-window window)) | |
1080 | (unless (memq direction '(above below left right)) | |
1081 | (error "Wrong direction %s" direction)) | |
1082 | (let* ((frame (window-frame window)) | |
1083 | (hor (memq direction '(left right))) | |
1084 | (first (if hor | |
1085 | (window-left-column window) | |
1086 | (window-top-line window))) | |
1087 | (last (+ first (if hor | |
1088 | (window-total-width window) | |
1089 | (window-total-height window)))) | |
1090 | (posn-cons (nth 6 (posn-at-point (window-point window) window))) | |
1091 | ;; The column / row value of `posn-at-point' can be nil for the | |
1092 | ;; mini-window, guard against that. | |
1093 | (posn (if hor | |
1094 | (+ (or (cdr posn-cons) 1) (window-top-line window)) | |
1095 | (+ (or (car posn-cons) 1) (window-left-column window)))) | |
1096 | (best-edge | |
1097 | (cond | |
1098 | ((eq direction 'below) (frame-height frame)) | |
1099 | ((eq direction 'right) (frame-width frame)) | |
1100 | (t -1))) | |
1101 | (best-edge-2 best-edge) | |
1102 | (best-diff-2 (if hor (frame-height frame) (frame-width frame))) | |
1103 | best best-2 best-diff-2-new) | |
1104 | (walk-window-tree | |
1105 | (lambda (w) | |
1106 | (let* ((w-top (window-top-line w)) | |
1107 | (w-left (window-left-column w))) | |
1108 | (cond | |
1109 | ((or (eq window w) | |
1110 | ;; Ignore ourselves. | |
1111 | (and (window-parameter w 'no-other-window) | |
1112 | ;; Ignore W unless IGNORE is non-nil. | |
1113 | (not ignore)))) | |
1114 | (hor | |
1115 | (cond | |
1116 | ((and (<= w-top posn) | |
1117 | (< posn (+ w-top (window-total-height w)))) | |
1118 | ;; W is to the left or right of WINDOW and covers POSN. | |
1119 | (when (or (and (eq direction 'left) | |
1120 | (<= w-left first) (> w-left best-edge)) | |
1121 | (and (eq direction 'right) | |
1122 | (>= w-left last) (< w-left best-edge))) | |
1123 | (setq best-edge w-left) | |
1124 | (setq best w))) | |
1125 | ((and (or (and (eq direction 'left) | |
1126 | (<= (+ w-left (window-total-width w)) first)) | |
1127 | (and (eq direction 'right) (<= last w-left))) | |
1128 | ;; W is to the left or right of WINDOW but does not | |
1129 | ;; cover POSN. | |
1130 | (setq best-diff-2-new | |
1131 | (window-in-direction-2 w posn hor)) | |
1132 | (or (< best-diff-2-new best-diff-2) | |
1133 | (and (= best-diff-2-new best-diff-2) | |
1134 | (if (eq direction 'left) | |
1135 | (> w-left best-edge-2) | |
1136 | (< w-left best-edge-2))))) | |
1137 | (setq best-edge-2 w-left) | |
1138 | (setq best-diff-2 best-diff-2-new) | |
1139 | (setq best-2 w)))) | |
1140 | (t | |
1141 | (cond | |
1142 | ((and (<= w-left posn) | |
1143 | (< posn (+ w-left (window-total-width w)))) | |
1144 | ;; W is above or below WINDOW and covers POSN. | |
1145 | (when (or (and (eq direction 'above) | |
1146 | (<= w-top first) (> w-top best-edge)) | |
1147 | (and (eq direction 'below) | |
1148 | (>= w-top first) (< w-top best-edge))) | |
1149 | (setq best-edge w-top) | |
1150 | (setq best w))) | |
1151 | ((and (or (and (eq direction 'above) | |
1152 | (<= (+ w-top (window-total-height w)) first)) | |
1153 | (and (eq direction 'below) (<= last w-top))) | |
1154 | ;; W is above or below WINDOW but does not cover POSN. | |
1155 | (setq best-diff-2-new | |
1156 | (window-in-direction-2 w posn hor)) | |
1157 | (or (< best-diff-2-new best-diff-2) | |
1158 | (and (= best-diff-2-new best-diff-2) | |
1159 | (if (eq direction 'above) | |
1160 | (> w-top best-edge-2) | |
1161 | (< w-top best-edge-2))))) | |
1162 | (setq best-edge-2 w-top) | |
1163 | (setq best-diff-2 best-diff-2-new) | |
1164 | (setq best-2 w))))))) | |
1165 | (window-frame window)) | |
1166 | (or best best-2))) | |
3c448ab6 MR |
1167 | |
1168 | (defun get-window-with-predicate (predicate &optional minibuf | |
1169 | all-frames default) | |
387522b2 MR |
1170 | "Return a live window satisfying PREDICATE. |
1171 | More precisely, cycle through all windows calling the function | |
1172 | PREDICATE on each one of them with the window as its sole | |
1173 | argument. Return the first window for which PREDICATE returns | |
1174 | non-nil. If no window satisfies PREDICATE, return DEFAULT. | |
1175 | ||
1176 | ALL-FRAMES nil or omitted means consider all windows on the selected | |
1177 | frame, plus the minibuffer window if specified by the MINIBUF | |
1178 | argument. If the minibuffer counts, consider all windows on all | |
1179 | frames that share that minibuffer too. The following non-nil | |
1180 | values of ALL-FRAMES have special meanings: | |
3c448ab6 | 1181 | |
387522b2 MR |
1182 | - t means consider all windows on all existing frames. |
1183 | ||
1184 | - `visible' means consider all windows on all visible frames on | |
1185 | the current terminal. | |
1186 | ||
1187 | - 0 (the number zero) means consider all windows on all visible | |
1188 | and iconified frames on the current terminal. | |
1189 | ||
1190 | - A frame means consider all windows on that frame only. | |
1191 | ||
1192 | Anything else means consider all windows on the selected frame | |
1193 | and no others." | |
3c448ab6 | 1194 | (catch 'found |
387522b2 MR |
1195 | (dolist (window (window-list-1 nil minibuf all-frames)) |
1196 | (when (funcall predicate window) | |
1197 | (throw 'found window))) | |
3c448ab6 MR |
1198 | default)) |
1199 | ||
1200 | (defalias 'some-window 'get-window-with-predicate) | |
1201 | ||
190b47e6 MR |
1202 | (defun get-lru-window (&optional all-frames dedicated) |
1203 | "Return the least recently used window on frames specified by ALL-FRAMES. | |
1204 | Return a full-width window if possible. A minibuffer window is | |
1205 | never a candidate. A dedicated window is never a candidate | |
1206 | unless DEDICATED is non-nil, so if all windows are dedicated, the | |
1207 | value is nil. Avoid returning the selected window if possible. | |
1208 | ||
1209 | The following non-nil values of the optional argument ALL-FRAMES | |
1210 | have special meanings: | |
1211 | ||
1212 | - t means consider all windows on all existing frames. | |
1213 | ||
1214 | - `visible' means consider all windows on all visible frames on | |
1215 | the current terminal. | |
1216 | ||
1217 | - 0 (the number zero) means consider all windows on all visible | |
1218 | and iconified frames on the current terminal. | |
1219 | ||
1220 | - A frame means consider all windows on that frame only. | |
1221 | ||
1222 | Any other value of ALL-FRAMES means consider all windows on the | |
1223 | selected frame and no others." | |
1224 | (let (best-window best-time second-best-window second-best-time time) | |
1225 | (dolist (window (window-list-1 nil nil all-frames)) | |
1226 | (when (or dedicated (not (window-dedicated-p window))) | |
1227 | (setq time (window-use-time window)) | |
1228 | (if (or (eq window (selected-window)) | |
1229 | (not (window-full-width-p window))) | |
1230 | (when (or (not second-best-time) (< time second-best-time)) | |
1231 | (setq second-best-time time) | |
1232 | (setq second-best-window window)) | |
1233 | (when (or (not best-time) (< time best-time)) | |
1234 | (setq best-time time) | |
1235 | (setq best-window window))))) | |
1236 | (or best-window second-best-window))) | |
1237 | ||
387522b2 MR |
1238 | (defun get-mru-window (&optional all-frames) |
1239 | "Return the most recently used window on frames specified by ALL-FRAMES. | |
1240 | Do not return a minibuffer window. | |
1241 | ||
1242 | The following non-nil values of the optional argument ALL-FRAMES | |
1243 | have special meanings: | |
1244 | ||
1245 | - t means consider all windows on all existing frames. | |
1246 | ||
1247 | - `visible' means consider all windows on all visible frames on | |
1248 | the current terminal. | |
1249 | ||
1250 | - 0 (the number zero) means consider all windows on all visible | |
1251 | and iconified frames on the current terminal. | |
1252 | ||
1253 | - A frame means consider all windows on that frame only. | |
1254 | ||
1255 | Any other value of ALL-FRAMES means consider all windows on the | |
1256 | selected frame and no others." | |
1257 | (let (best-window best-time time) | |
1258 | (dolist (window (window-list-1 nil nil all-frames)) | |
1259 | (setq time (window-use-time window)) | |
1260 | (when (or (not best-time) (> time best-time)) | |
1261 | (setq best-time time) | |
1262 | (setq best-window window))) | |
1263 | best-window)) | |
1264 | ||
190b47e6 MR |
1265 | (defun get-largest-window (&optional all-frames dedicated) |
1266 | "Return the largest window on frames specified by ALL-FRAMES. | |
1267 | A minibuffer window is never a candidate. A dedicated window is | |
1268 | never a candidate unless DEDICATED is non-nil, so if all windows | |
1269 | are dedicated, the value is nil. | |
1270 | ||
1271 | The following non-nil values of the optional argument ALL-FRAMES | |
1272 | have special meanings: | |
1273 | ||
1274 | - t means consider all windows on all existing frames. | |
1275 | ||
1276 | - `visible' means consider all windows on all visible frames on | |
1277 | the current terminal. | |
1278 | ||
1279 | - 0 (the number zero) means consider all windows on all visible | |
1280 | and iconified frames on the current terminal. | |
1281 | ||
1282 | - A frame means consider all windows on that frame only. | |
1283 | ||
1284 | Any other value of ALL-FRAMES means consider all windows on the | |
1285 | selected frame and no others." | |
1286 | (let ((best-size 0) | |
1287 | best-window size) | |
1288 | (dolist (window (window-list-1 nil nil all-frames)) | |
1289 | (when (or dedicated (not (window-dedicated-p window))) | |
1290 | (setq size (* (window-total-size window) | |
1291 | (window-total-size window t))) | |
1292 | (when (> size best-size) | |
1293 | (setq best-size size) | |
1294 | (setq best-window window)))) | |
1295 | best-window)) | |
1296 | ||
3c448ab6 MR |
1297 | (defun get-buffer-window-list (&optional buffer-or-name minibuf all-frames) |
1298 | "Return list of all windows displaying BUFFER-OR-NAME, or nil if none. | |
1299 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer | |
1300 | and defaults to the current buffer. | |
1301 | ||
190b47e6 MR |
1302 | Any windows showing BUFFER-OR-NAME on the selected frame are listed |
1303 | first. | |
1304 | ||
1305 | MINIBUF t means include the minibuffer window even if the | |
1306 | minibuffer is not active. MINIBUF nil or omitted means include | |
1307 | the minibuffer window only if the minibuffer is active. Any | |
1308 | other value means do not include the minibuffer window even if | |
1309 | the minibuffer is active. | |
1310 | ||
1311 | ALL-FRAMES nil or omitted means consider all windows on the | |
1312 | selected frame, plus the minibuffer window if specified by the | |
1313 | MINIBUF argument. If the minibuffer counts, consider all windows | |
1314 | on all frames that share that minibuffer too. The following | |
1315 | non-nil values of ALL-FRAMES have special meanings: | |
1316 | ||
1317 | - t means consider all windows on all existing frames. | |
1318 | ||
1319 | - `visible' means consider all windows on all visible frames on | |
1320 | the current terminal. | |
1321 | ||
1322 | - 0 (the number zero) means consider all windows on all visible | |
1323 | and iconified frames on the current terminal. | |
1324 | ||
1325 | - A frame means consider all windows on that frame only. | |
1326 | ||
1327 | Anything else means consider all windows on the selected frame | |
1328 | and no others." | |
1329 | (let ((buffer (normalize-live-buffer buffer-or-name)) | |
3c448ab6 | 1330 | windows) |
190b47e6 MR |
1331 | (dolist (window (window-list-1 (frame-first-window) minibuf all-frames)) |
1332 | (when (eq (window-buffer window) buffer) | |
1333 | (setq windows (cons window windows)))) | |
1334 | (nreverse windows))) | |
3c448ab6 MR |
1335 | |
1336 | (defun minibuffer-window-active-p (window) | |
1337 | "Return t if WINDOW is the currently active minibuffer window." | |
1338 | (eq window (active-minibuffer-window))) | |
387522b2 | 1339 | |
3c448ab6 | 1340 | (defun count-windows (&optional minibuf) |
387522b2 | 1341 | "Return the number of live windows on the selected frame. |
3c448ab6 MR |
1342 | The optional argument MINIBUF specifies whether the minibuffer |
1343 | window shall be counted. See `walk-windows' for the precise | |
1344 | meaning of this argument." | |
387522b2 | 1345 | (length (window-list-1 nil minibuf))) |
9aab8e0d MR |
1346 | \f |
1347 | ;;; Resizing windows. | |
1348 | (defun resize-window-reset (&optional frame horizontal) | |
1349 | "Reset resize values for all windows on FRAME. | |
1350 | FRAME defaults to the selected frame. | |
1351 | ||
1352 | This function stores the current value of `window-total-size' applied | |
1353 | with argument HORIZONTAL in the new total size of all windows on | |
1354 | FRAME. It also resets the new normal size of each of these | |
1355 | windows." | |
1356 | (resize-window-reset-1 | |
1357 | (frame-root-window (normalize-live-frame frame)) horizontal)) | |
1358 | ||
1359 | (defun resize-window-reset-1 (window horizontal) | |
1360 | "Internal function of `resize-window-reset'." | |
1361 | ;; Register old size in the new total size. | |
1362 | (set-window-new-total window (window-total-size window horizontal)) | |
1363 | ;; Reset new normal size. | |
1364 | (set-window-new-normal window) | |
1365 | (when (window-child window) | |
1366 | (resize-window-reset-1 (window-child window) horizontal)) | |
1367 | (when (window-right window) | |
1368 | (resize-window-reset-1 (window-right window) horizontal))) | |
1369 | ||
562dd5e9 MR |
1370 | ;; The following routine is used to manually resize the minibuffer |
1371 | ;; window and is currently used, for example, by ispell.el. | |
1372 | (defun resize-mini-window (window delta) | |
1373 | "Resize minibuffer window WINDOW by DELTA lines. | |
1374 | If WINDOW cannot be resized by DELTA lines make it as large \(or | |
1375 | as small) as possible but don't signal an error." | |
1376 | (when (window-minibuffer-p window) | |
1377 | (let* ((frame (window-frame window)) | |
1378 | (root (frame-root-window frame)) | |
1379 | (height (window-total-size window)) | |
1380 | (min-delta | |
1381 | (- (window-total-size root) | |
1382 | (window-min-size root)))) | |
1383 | ;; Sanitize DELTA. | |
1384 | (cond | |
1385 | ((<= (+ height delta) 0) | |
1386 | (setq delta (- (- height 1)))) | |
1387 | ((> delta min-delta) | |
1388 | (setq delta min-delta))) | |
1389 | ||
1390 | ;; Resize now. | |
1391 | (resize-window-reset frame) | |
1392 | ;; Ideally we should be able to resize just the last subwindow of | |
1393 | ;; root here. See the comment in `resize-root-window-vertically' | |
1394 | ;; for why we do not do that. | |
1395 | (resize-this-window root (- delta) nil nil t) | |
1396 | (set-window-new-total window (+ height delta)) | |
1397 | ;; The following routine catches the case where we want to resize | |
1398 | ;; a minibuffer-only frame. | |
1399 | (resize-mini-window-internal window)))) | |
1400 | ||
1401 | (defun resize-window (window delta &optional horizontal ignore) | |
1402 | "Resize WINDOW vertically by DELTA lines. | |
1403 | WINDOW can be an arbitrary window and defaults to the selected | |
1404 | one. An attempt to resize the root window of a frame will raise | |
1405 | an error though. | |
1406 | ||
1407 | DELTA a positive number means WINDOW shall be enlarged by DELTA | |
1408 | lines. DELTA negative means WINDOW shall be shrunk by -DELTA | |
1409 | lines. | |
1410 | ||
1411 | Optional argument HORIZONTAL non-nil means resize WINDOW | |
1412 | horizontally by DELTA columns. In this case a positive DELTA | |
1413 | means enlarge WINDOW by DELTA columns. DELTA negative means | |
1414 | WINDOW shall be shrunk by -DELTA columns. | |
1415 | ||
1416 | Optional argument IGNORE non-nil means ignore any restrictions | |
1417 | imposed by fixed size windows, `window-min-height' or | |
1418 | `window-min-width' settings. IGNORE any window means ignore | |
1419 | restrictions for that window only. IGNORE equal `safe' means | |
1420 | live windows may get as small as `window-safe-min-height' lines | |
1421 | and `window-safe-min-width' columns. | |
1422 | ||
1423 | This function resizes other windows proportionally and never | |
1424 | deletes any windows. If you want to move only the low (right) | |
1425 | edge of WINDOW consider using `adjust-window-trailing-edge' | |
1426 | instead." | |
1427 | (setq window (normalize-any-window window)) | |
1428 | (let* ((frame (window-frame window)) | |
1429 | sibling) | |
1430 | (cond | |
1431 | ((eq window (frame-root-window frame)) | |
1432 | (error "Cannot resize the root window of a frame")) | |
1433 | ((window-minibuffer-p window) | |
1434 | (resize-mini-window window delta)) | |
1435 | ((window-resizable-p window delta horizontal ignore) | |
1436 | (resize-window-reset frame horizontal) | |
1437 | (resize-this-window window delta horizontal ignore t) | |
1438 | (if (and (not (window-splits window)) | |
1439 | (window-iso-combined-p window horizontal) | |
1440 | (setq sibling (or (window-right window) (window-left window))) | |
1441 | (window-sizable-p sibling (- delta) horizontal ignore)) | |
1442 | ;; If window-splits returns nil for WINDOW, WINDOW is part of | |
1443 | ;; an iso-combination, and WINDOW's neighboring right or left | |
1444 | ;; sibling can be resized as requested, resize that sibling. | |
1445 | (let ((normal-delta | |
1446 | (/ (float delta) | |
1447 | (window-total-size (window-parent window) horizontal)))) | |
1448 | (resize-this-window sibling (- delta) horizontal nil t) | |
1449 | (set-window-new-normal | |
1450 | window (+ (window-normal-size window horizontal) | |
1451 | normal-delta)) | |
1452 | (set-window-new-normal | |
1453 | sibling (- (window-normal-size sibling horizontal) | |
1454 | normal-delta))) | |
1455 | ;; Otherwise, resize all other windows in the same combination. | |
1456 | (resize-other-windows window delta horizontal ignore)) | |
1457 | (resize-window-apply frame horizontal)) | |
1458 | (t | |
1459 | (error "Cannot resize window %s" window))))) | |
1460 | ||
9aab8e0d MR |
1461 | (defsubst resize-subwindows-skip-p (window) |
1462 | "Return non-nil if WINDOW shall be skipped by resizing routines." | |
1463 | (memq (window-new-normal window) '(ignore stuck skip))) | |
1464 | ||
1465 | (defun resize-subwindows-normal (parent horizontal window this-delta &optional trail other-delta) | |
1466 | "Set the new normal height of subwindows of window PARENT. | |
1467 | HORIZONTAL non-nil means set the new normal width of these | |
1468 | windows. WINDOW specifies a subwindow of PARENT that has been | |
1469 | resized by THIS-DELTA lines \(columns). | |
1470 | ||
1471 | Optional argument TRAIL either 'before or 'after means set values | |
1472 | for windows before or after WINDOW only. Optional argument | |
1473 | OTHER-DELTA a number specifies that this many lines \(columns) | |
1474 | have been obtained from \(or returned to) an ancestor window of | |
1475 | PARENT in order to resize WINDOW." | |
1476 | (let* ((delta-normal | |
1477 | (if (and (= (- this-delta) (window-total-size window horizontal)) | |
1478 | (zerop other-delta)) | |
1479 | ;; When WINDOW gets deleted and we can return its entire | |
1480 | ;; space to its siblings, use WINDOW's normal size as the | |
1481 | ;; normal delta. | |
1482 | (- (window-normal-size window horizontal)) | |
1483 | ;; In any other case calculate the normal delta from the | |
1484 | ;; relation of THIS-DELTA to the total size of PARENT. | |
1485 | (/ (float this-delta) (window-total-size parent horizontal)))) | |
1486 | (sub (window-child parent)) | |
1487 | (parent-normal 0.0) | |
1488 | (skip (eq trail 'after))) | |
1489 | ||
1490 | ;; Set parent-normal to the sum of the normal sizes of all | |
1491 | ;; subwindows of PARENT that shall be resized, excluding only WINDOW | |
1492 | ;; and any windows specified by the optional TRAIL argument. | |
1493 | (while sub | |
1494 | (cond | |
1495 | ((eq sub window) | |
1496 | (setq skip (eq trail 'before))) | |
1497 | (skip) | |
1498 | (t | |
1499 | (setq parent-normal | |
1500 | (+ parent-normal (window-normal-size sub horizontal))))) | |
1501 | (setq sub (window-right sub))) | |
1502 | ||
1503 | ;; Set the new normal size of all subwindows of PARENT from what | |
1504 | ;; they should have contributed for recovering THIS-DELTA lines | |
1505 | ;; (columns). | |
1506 | (setq sub (window-child parent)) | |
1507 | (setq skip (eq trail 'after)) | |
1508 | (while sub | |
1509 | (cond | |
1510 | ((eq sub window) | |
1511 | (setq skip (eq trail 'before))) | |
1512 | (skip) | |
1513 | (t | |
1514 | (let ((old-normal (window-normal-size sub horizontal))) | |
1515 | (set-window-new-normal | |
1516 | sub (min 1.0 ; Don't get larger than 1. | |
1517 | (max (- old-normal | |
1518 | (* (/ old-normal parent-normal) | |
1519 | delta-normal)) | |
1520 | ;; Don't drop below 0. | |
1521 | 0.0)))))) | |
1522 | (setq sub (window-right sub))) | |
1523 | ||
1524 | (when (numberp other-delta) | |
1525 | ;; Set the new normal size of windows from what they should have | |
1526 | ;; contributed for recovering OTHER-DELTA lines (columns). | |
1527 | (setq delta-normal (/ (float (window-total-size parent horizontal)) | |
1528 | (+ (window-total-size parent horizontal) | |
1529 | other-delta))) | |
1530 | (setq sub (window-child parent)) | |
1531 | (setq skip (eq trail 'after)) | |
1532 | (while sub | |
1533 | (cond | |
1534 | ((eq sub window) | |
1535 | (setq skip (eq trail 'before))) | |
1536 | (skip) | |
1537 | (t | |
1538 | (set-window-new-normal | |
1539 | sub (min 1.0 ; Don't get larger than 1. | |
1540 | (max (* (window-new-normal sub) delta-normal) | |
1541 | ;; Don't drop below 0. | |
1542 | 0.0))))) | |
1543 | (setq sub (window-right sub)))) | |
1544 | ||
1545 | ;; Set the new normal size of WINDOW to what is left by the sum of | |
1546 | ;; the normal sizes of its siblings. | |
1547 | (set-window-new-normal | |
1548 | window | |
1549 | (let ((sum 0)) | |
1550 | (setq sub (window-child parent)) | |
1551 | (while sub | |
1552 | (cond | |
1553 | ((eq sub window)) | |
1554 | ((not (numberp (window-new-normal sub))) | |
1555 | (setq sum (+ sum (window-normal-size sub horizontal)))) | |
1556 | (t | |
1557 | (setq sum (+ sum (window-new-normal sub))))) | |
1558 | (setq sub (window-right sub))) | |
1559 | ;; Don't get larger than 1 or smaller than 0. | |
1560 | (min 1.0 (max (- 1.0 sum) 0.0)))))) | |
1561 | ||
1562 | (defun resize-subwindows (parent delta &optional horizontal window ignore trail edge) | |
1563 | "Resize subwindows of window PARENT vertically by DELTA lines. | |
1564 | PARENT must be a vertically combined internal window. | |
1565 | ||
1566 | Optional argument HORIZONTAL non-nil means resize subwindows of | |
1567 | PARENT horizontally by DELTA columns. In this case PARENT must | |
1568 | be a horizontally combined internal window. | |
1569 | ||
1570 | WINDOW, if specified, must denote a child window of PARENT that | |
1571 | is resized by DELTA lines. | |
1572 | ||
1573 | Optional argument IGNORE non-nil means ignore any restrictions | |
1574 | imposed by fixed size windows, `window-min-height' or | |
1575 | `window-min-width' settings. IGNORE equal `safe' means live | |
1576 | windows may get as small as `window-safe-min-height' lines and | |
1577 | `window-safe-min-width' columns. IGNORE any window means ignore | |
1578 | restrictions for that window only. | |
1579 | ||
1580 | Optional arguments TRAIL and EDGE, when non-nil, restrict the set | |
1581 | of windows that shall be resized. If TRAIL equals `before', | |
1582 | resize only windows on the left or above EDGE. If TRAIL equals | |
1583 | `after', resize only windows on the right or below EDGE. Also, | |
1584 | preferably only resize windows adjacent to EDGE. | |
1585 | ||
1586 | Return the symbol `normalized' if new normal sizes have been | |
1587 | already set by this routine." | |
1588 | (let* ((first (window-child parent)) | |
1589 | (sub first) | |
1590 | (parent-total (+ (window-total-size parent horizontal) delta)) | |
1591 | best-window best-value) | |
1592 | ||
1593 | (if (and edge (memq trail '(before after)) | |
1594 | (progn | |
1595 | (setq sub first) | |
1596 | (while (and (window-right sub) | |
1597 | (or (and (eq trail 'before) | |
1598 | (not (resize-subwindows-skip-p | |
1599 | (window-right sub)))) | |
1600 | (and (eq trail 'after) | |
1601 | (resize-subwindows-skip-p sub)))) | |
1602 | (setq sub (window-right sub))) | |
1603 | sub) | |
1604 | (if horizontal | |
1605 | (if (eq trail 'before) | |
1606 | (= (+ (window-left-column sub) | |
1607 | (window-total-size sub t)) | |
1608 | edge) | |
1609 | (= (window-left-column sub) edge)) | |
1610 | (if (eq trail 'before) | |
1611 | (= (+ (window-top-line sub) | |
1612 | (window-total-size sub)) | |
1613 | edge) | |
1614 | (= (window-top-line sub) edge))) | |
1615 | (window-sizable-p sub delta horizontal ignore)) | |
1616 | ;; Resize only windows adjacent to EDGE. | |
1617 | (progn | |
1618 | (resize-this-window sub delta horizontal ignore t trail edge) | |
1619 | (if (and window (eq (window-parent sub) parent)) | |
1620 | (progn | |
1621 | ;; Assign new normal sizes. | |
1622 | (set-window-new-normal | |
1623 | sub (/ (float (window-new-total sub)) parent-total)) | |
1624 | (set-window-new-normal | |
1625 | window (- (window-normal-size window horizontal) | |
1626 | (- (window-new-normal sub) | |
1627 | (window-normal-size sub horizontal))))) | |
1628 | (resize-subwindows-normal parent horizontal sub 0 trail delta)) | |
1629 | ;; Return 'normalized to notify `resize-other-windows' that | |
1630 | ;; normal sizes have been already set. | |
1631 | 'normalized) | |
1632 | ;; Resize all windows proportionally. | |
1633 | (setq sub first) | |
1634 | (while sub | |
1635 | (cond | |
1636 | ((or (resize-subwindows-skip-p sub) | |
1637 | ;; Ignore windows to skip and fixed-size subwindows - in | |
1638 | ;; the latter case make it a window to skip. | |
1639 | (and (not ignore) | |
1640 | (window-size-fixed-p sub horizontal) | |
1641 | (set-window-new-normal sub 'ignore)))) | |
1642 | ((< delta 0) | |
1643 | ;; When shrinking store the number of lines/cols we can get | |
1644 | ;; from this window here together with the total/normal size | |
1645 | ;; factor. | |
1646 | (set-window-new-normal | |
1647 | sub | |
1648 | (cons | |
1649 | ;; We used to call this with NODOWN t, "fixed" 2011-05-11. | |
1650 | (window-min-delta sub horizontal ignore trail t) ; t) | |
1651 | (- (/ (float (window-total-size sub horizontal)) | |
1652 | parent-total) | |
1653 | (window-normal-size sub horizontal))))) | |
1654 | ((> delta 0) | |
1655 | ;; When enlarging store the total/normal size factor only | |
1656 | (set-window-new-normal | |
1657 | sub | |
1658 | (- (/ (float (window-total-size sub horizontal)) | |
1659 | parent-total) | |
1660 | (window-normal-size sub horizontal))))) | |
1661 | ||
1662 | (setq sub (window-right sub))) | |
1663 | ||
1664 | (cond | |
1665 | ((< delta 0) | |
1666 | ;; Shrink windows by delta. | |
1667 | (setq best-window t) | |
1668 | (while (and best-window (not (zerop delta))) | |
1669 | (setq sub first) | |
1670 | (setq best-window nil) | |
1671 | (setq best-value most-negative-fixnum) | |
1672 | (while sub | |
1673 | (when (and (consp (window-new-normal sub)) | |
1674 | (not (zerop (car (window-new-normal sub)))) | |
1675 | (> (cdr (window-new-normal sub)) best-value)) | |
1676 | (setq best-window sub) | |
1677 | (setq best-value (cdr (window-new-normal sub)))) | |
1678 | ||
1679 | (setq sub (window-right sub))) | |
1680 | ||
1681 | (when best-window | |
1682 | (setq delta (1+ delta))) | |
1683 | (set-window-new-total best-window -1 t) | |
1684 | (set-window-new-normal | |
1685 | best-window | |
1686 | (if (= (car (window-new-normal best-window)) 1) | |
1687 | 'skip ; We can't shrink best-window any further. | |
1688 | (cons (1- (car (window-new-normal best-window))) | |
1689 | (- (/ (float (window-new-total best-window)) | |
1690 | parent-total) | |
1691 | (window-normal-size best-window horizontal))))))) | |
1692 | ((> delta 0) | |
1693 | ;; Enlarge windows by delta. | |
1694 | (setq best-window t) | |
1695 | (while (and best-window (not (zerop delta))) | |
1696 | (setq sub first) | |
1697 | (setq best-window nil) | |
1698 | (setq best-value most-positive-fixnum) | |
1699 | (while sub | |
1700 | (when (and (numberp (window-new-normal sub)) | |
1701 | (< (window-new-normal sub) best-value)) | |
1702 | (setq best-window sub) | |
1703 | (setq best-value (window-new-normal sub))) | |
1704 | ||
1705 | (setq sub (window-right sub))) | |
1706 | ||
1707 | (when best-window | |
1708 | (setq delta (1- delta))) | |
1709 | (set-window-new-total best-window 1 t) | |
1710 | (set-window-new-normal | |
1711 | best-window | |
1712 | (- (/ (float (window-new-total best-window)) | |
1713 | parent-total) | |
1714 | (window-normal-size best-window horizontal)))))) | |
1715 | ||
1716 | (when best-window | |
1717 | (setq sub first) | |
1718 | (while sub | |
1719 | (when (or (consp (window-new-normal sub)) | |
1720 | (numberp (window-new-normal sub))) | |
1721 | ;; Reset new normal size fields so `resize-window-apply' | |
1722 | ;; won't use them to apply new sizes. | |
1723 | (set-window-new-normal sub)) | |
1724 | ||
1725 | (unless (eq (window-new-normal sub) 'ignore) | |
1726 | ;; Resize this subwindow's subwindows (back-engineering | |
1727 | ;; delta from sub's old and new total sizes). | |
1728 | (let ((delta (- (window-new-total sub) | |
1729 | (window-total-size sub horizontal)))) | |
1730 | (unless (and (zerop delta) (not trail)) | |
1731 | ;; For the TRAIL non-nil case we have to resize SUB | |
1732 | ;; recursively even if it's size does not change. | |
1733 | (resize-this-window | |
1734 | sub delta horizontal ignore nil trail edge)))) | |
1735 | (setq sub (window-right sub))))))) | |
1736 | ||
1737 | (defun resize-other-windows (window delta &optional horizontal ignore trail edge) | |
1738 | "Resize other windows when WINDOW is resized vertically by DELTA lines. | |
1739 | Optional argument HORIZONTAL non-nil means resize other windows | |
1740 | when WINDOW is resized horizontally by DELTA columns. WINDOW | |
1741 | itself is not resized by this function. | |
1742 | ||
1743 | Optional argument IGNORE non-nil means ignore any restrictions | |
1744 | imposed by fixed size windows, `window-min-height' or | |
1745 | `window-min-width' settings. IGNORE equal `safe' means live | |
1746 | windows may get as small as `window-safe-min-height' lines and | |
1747 | `window-safe-min-width' columns. IGNORE any window means ignore | |
1748 | restrictions for that window only. | |
1749 | ||
1750 | Optional arguments TRAIL and EDGE, when non-nil, refine the set | |
1751 | of windows that shall be resized. If TRAIL equals `before', | |
1752 | resize only windows on the left or above EDGE. If TRAIL equals | |
1753 | `after', resize only windows on the right or below EDGE. Also, | |
1754 | preferably only resize windows adjacent to EDGE." | |
1755 | (when (window-parent window) | |
1756 | (let* ((parent (window-parent window)) | |
1757 | (sub (window-child parent))) | |
1758 | (if (window-iso-combined-p sub horizontal) | |
1759 | ;; In an iso-combination try to extract DELTA from WINDOW's | |
1760 | ;; siblings. | |
1761 | (let ((first sub) | |
1762 | (skip (eq trail 'after)) | |
1763 | this-delta other-delta) | |
1764 | ;; Decide which windows shall be left alone. | |
1765 | (while sub | |
1766 | (cond | |
1767 | ((eq sub window) | |
1768 | ;; Make sure WINDOW is left alone when | |
1769 | ;; resizing its siblings. | |
1770 | (set-window-new-normal sub 'ignore) | |
1771 | (setq skip (eq trail 'before))) | |
1772 | (skip | |
1773 | ;; Make sure this sibling is left alone when | |
1774 | ;; resizing its siblings. | |
1775 | (set-window-new-normal sub 'ignore)) | |
1776 | ((or (window-size-ignore sub ignore) | |
1777 | (not (window-size-fixed-p sub horizontal))) | |
1778 | ;; Set this-delta to t to signal that we found a sibling | |
1779 | ;; of WINDOW whose size is not fixed. | |
1780 | (setq this-delta t))) | |
1781 | ||
1782 | (setq sub (window-right sub))) | |
1783 | ||
1784 | ;; Set this-delta to what we can get from WINDOW's siblings. | |
1785 | (if (= (- delta) (window-total-size window horizontal)) | |
1786 | ;; A deletion, presumably. We must handle this case | |
1787 | ;; specially since `window-resizable' can't be used. | |
1788 | (if this-delta | |
1789 | ;; There's at least one resizable sibling we can | |
1790 | ;; give WINDOW's size to. | |
1791 | (setq this-delta delta) | |
1792 | ;; No resizable sibling exists. | |
1793 | (setq this-delta 0)) | |
1794 | ;; Any other form of resizing. | |
1795 | (setq this-delta | |
1796 | (window-resizable window delta horizontal ignore trail t))) | |
1797 | ||
1798 | ;; Set other-delta to what we still have to get from | |
1799 | ;; ancestor windows of parent. | |
1800 | (setq other-delta (- delta this-delta)) | |
1801 | (unless (zerop other-delta) | |
1802 | ;; Unless we got everything from WINDOW's siblings, PARENT | |
1803 | ;; must be resized by other-delta lines or columns. | |
1804 | (set-window-new-total parent other-delta 'add)) | |
1805 | ||
1806 | (if (zerop this-delta) | |
1807 | ;; We haven't got anything from WINDOW's siblings but we | |
1808 | ;; must update the normal sizes to respect other-delta. | |
1809 | (resize-subwindows-normal | |
1810 | parent horizontal window this-delta trail other-delta) | |
1811 | ;; We did get something from WINDOW's siblings which means | |
1812 | ;; we have to resize their subwindows. | |
1813 | (unless (eq (resize-subwindows parent (- this-delta) horizontal | |
1814 | window ignore trail edge) | |
1815 | ;; `resize-subwindows' returning 'normalized, | |
1816 | ;; means it has set the normal sizes already. | |
1817 | 'normalized) | |
1818 | ;; Set the normal sizes. | |
1819 | (resize-subwindows-normal | |
1820 | parent horizontal window this-delta trail other-delta)) | |
1821 | ;; Set DELTA to what we still have to get from ancestor | |
1822 | ;; windows. | |
1823 | (setq delta other-delta))) | |
1824 | ||
1825 | ;; In an ortho-combination all siblings of WINDOW must be | |
1826 | ;; resized by DELTA. | |
1827 | (set-window-new-total parent delta 'add) | |
1828 | (while sub | |
1829 | (unless (eq sub window) | |
1830 | (resize-this-window sub delta horizontal ignore t)) | |
1831 | (setq sub (window-right sub)))) | |
1832 | ||
1833 | (unless (zerop delta) | |
1834 | ;; "Go up." | |
1835 | (resize-other-windows parent delta horizontal ignore trail edge))))) | |
1836 | ||
1837 | (defun resize-this-window (window delta &optional horizontal ignore add trail edge) | |
1838 | "Resize WINDOW vertically by DELTA lines. | |
1839 | Optional argument HORIZONTAL non-nil means resize WINDOW | |
1840 | horizontally by DELTA columns. | |
1841 | ||
1842 | Optional argument IGNORE non-nil means ignore any restrictions | |
1843 | imposed by fixed size windows, `window-min-height' or | |
1844 | `window-min-width' settings. IGNORE equal `safe' means live | |
1845 | windows may get as small as `window-safe-min-height' lines and | |
1846 | `window-safe-min-width' columns. IGNORE any window means ignore | |
1847 | restrictions for that window only. | |
1848 | ||
1849 | Optional argument ADD non-nil means add DELTA to the new total | |
1850 | size of WINDOW. | |
1851 | ||
1852 | Optional arguments TRAIL and EDGE, when non-nil, refine the set | |
1853 | of windows that shall be resized. If TRAIL equals `before', | |
1854 | resize only windows on the left or above EDGE. If TRAIL equals | |
1855 | `after', resize only windows on the right or below EDGE. Also, | |
1856 | preferably only resize windows adjacent to EDGE. | |
1857 | ||
1858 | This function recursively resizes WINDOW's subwindows to fit the | |
1859 | new size. Make sure that WINDOW is `window-resizable' before | |
1860 | calling this function. Note that this function does not resize | |
1861 | siblings of WINDOW or WINDOW's parent window. You have to | |
1862 | eventually call `resize-window-apply' in order to make resizing | |
1863 | actually take effect." | |
1864 | (when add | |
1865 | ;; Add DELTA to the new total size of WINDOW. | |
1866 | (set-window-new-total window delta t)) | |
387522b2 | 1867 | |
9aab8e0d MR |
1868 | (let ((sub (window-child window))) |
1869 | (cond | |
1870 | ((not sub)) | |
1871 | ((window-iso-combined-p sub horizontal) | |
1872 | ;; In an iso-combination resize subwindows according to their | |
1873 | ;; normal sizes. | |
1874 | (resize-subwindows window delta horizontal nil ignore trail edge)) | |
1875 | ;; In an ortho-combination resize each subwindow by DELTA. | |
1876 | (t | |
1877 | (while sub | |
1878 | (resize-this-window sub delta horizontal ignore t trail edge) | |
1879 | (setq sub (window-right sub))))))) | |
1880 | ||
1881 | (defun resize-root-window (window delta horizontal ignore) | |
1882 | "Resize root window WINDOW vertically by DELTA lines. | |
1883 | HORIZONTAL non-nil means resize root window WINDOW horizontally | |
1884 | by DELTA columns. | |
1885 | ||
1886 | IGNORE non-nil means ignore any restrictions imposed by fixed | |
1887 | size windows, `window-min-height' or `window-min-width' settings. | |
1888 | ||
1889 | This function is only called by the frame resizing routines. It | |
1890 | resizes windows proportionally and never deletes any windows." | |
1891 | (when (and (windowp window) (numberp delta) | |
1892 | (window-sizable-p window delta horizontal ignore)) | |
1893 | (resize-window-reset (window-frame window) horizontal) | |
1894 | (resize-this-window window delta horizontal ignore t))) | |
1895 | ||
1896 | (defun resize-root-window-vertically (window delta) | |
1897 | "Resize root window WINDOW vertically by DELTA lines. | |
1898 | If DELTA is less than zero and we can't shrink WINDOW by DELTA | |
1899 | lines, shrink it as much as possible. If DELTA is greater than | |
1900 | zero, this function can resize fixed-size subwindows in order to | |
1901 | recover the necessary lines. | |
1902 | ||
1903 | Return the number of lines that were recovered. | |
1904 | ||
1905 | This function is only called by the minibuffer window resizing | |
1906 | routines. It resizes windows proportionally and never deletes | |
1907 | any windows." | |
1908 | (when (numberp delta) | |
1909 | (let (ignore) | |
1910 | (cond | |
1911 | ((< delta 0) | |
1912 | (setq delta (window-sizable window delta))) | |
1913 | ((> delta 0) | |
1914 | (unless (window-sizable window delta) | |
1915 | (setq ignore t)))) | |
1916 | ||
1917 | (resize-window-reset (window-frame window)) | |
1918 | ;; Ideally, we would resize just the last window in a combination | |
1919 | ;; but that's not feasible for the following reason: If we grow | |
1920 | ;; the minibuffer window and the last window cannot be shrunk any | |
1921 | ;; more, we shrink another window instead. But if we then shrink | |
1922 | ;; the minibuffer window again, the last window might get enlarged | |
1923 | ;; and the state after shrinking is not the state before growing. | |
1924 | ;; So, in practice, we'd need a history variable to record how to | |
1925 | ;; proceed. But I'm not sure how such a variable could work with | |
1926 | ;; repeated minibuffer window growing steps. | |
1927 | (resize-this-window window delta nil ignore t) | |
1928 | delta))) | |
1929 | ||
562dd5e9 MR |
1930 | (defun adjust-window-trailing-edge (window delta &optional horizontal) |
1931 | "Move WINDOW's bottom edge by DELTA lines. | |
1932 | Optional argument HORIZONTAL non-nil means move WINDOW's right | |
1933 | edge by DELTA columns. WINDOW defaults to the selected window. | |
1934 | ||
1935 | If DELTA is greater zero, then move the edge downwards or to the | |
1936 | right. If DELTA is less than zero, move the edge upwards or to | |
1937 | the left. If the edge can't be moved by DELTA lines or columns, | |
1938 | move it as far as possible in the desired direction." | |
1939 | (setq window (normalize-any-window window)) | |
1940 | (let ((frame (window-frame window)) | |
1941 | (right window) | |
1942 | left this-delta min-delta max-delta failed) | |
1943 | ;; Find the edge we want to move. | |
1944 | (while (and (or (not (window-iso-combined-p right horizontal)) | |
1945 | (not (window-right right))) | |
1946 | (setq right (window-parent right)))) | |
1947 | (cond | |
1948 | ((and (not right) (not horizontal) (not resize-mini-windows) | |
1949 | (eq (window-frame (minibuffer-window frame)) frame)) | |
1950 | (resize-mini-window (minibuffer-window frame) (- delta))) | |
1951 | ((or (not (setq left right)) (not (setq right (window-right right)))) | |
1952 | (if horizontal | |
1953 | (error "No window on the right of this one") | |
1954 | (error "No window below this one"))) | |
1955 | (t | |
1956 | ;; Set LEFT to the first resizable window on the left. This step is | |
1957 | ;; needed to handle fixed-size windows. | |
1958 | (while (and left (window-size-fixed-p left horizontal)) | |
1959 | (setq left | |
1960 | (or (window-left left) | |
1961 | (progn | |
1962 | (while (and (setq left (window-parent left)) | |
1963 | (not (window-iso-combined-p left horizontal)))) | |
1964 | (window-left left))))) | |
1965 | (unless left | |
1966 | (if horizontal | |
1967 | (error "No resizable window on the left of this one") | |
1968 | (error "No resizable window above this one"))) | |
1969 | ||
1970 | ;; Set RIGHT to the first resizable window on the right. This step | |
1971 | ;; is needed to handle fixed-size windows. | |
1972 | (while (and right (window-size-fixed-p right horizontal)) | |
1973 | (setq right | |
1974 | (or (window-right right) | |
1975 | (progn | |
1976 | (while (and (setq right (window-parent right)) | |
1977 | (not (window-iso-combined-p right horizontal)))) | |
1978 | (window-right right))))) | |
1979 | (unless right | |
1980 | (if horizontal | |
1981 | (error "No resizable window on the right of this one") | |
1982 | (error "No resizable window below this one"))) | |
1983 | ||
1984 | ;; LEFT and RIGHT (which might be both internal windows) are now the | |
1985 | ;; two windows we want to resize. | |
1986 | (cond | |
1987 | ((> delta 0) | |
1988 | (setq max-delta (window-max-delta-1 left 0 horizontal nil 'after)) | |
1989 | (setq min-delta (window-min-delta-1 right (- delta) horizontal nil 'before)) | |
1990 | (when (or (< max-delta delta) (> min-delta (- delta))) | |
1991 | ;; We can't get the whole DELTA - move as far as possible. | |
1992 | (setq delta (min max-delta (- min-delta)))) | |
1993 | (unless (zerop delta) | |
1994 | ;; Start resizing. | |
1995 | (resize-window-reset frame horizontal) | |
1996 | ;; Try to enlarge LEFT first. | |
1997 | (setq this-delta (window-resizable left delta horizontal)) | |
1998 | (unless (zerop this-delta) | |
1999 | (resize-this-window | |
2000 | left this-delta horizontal nil t 'before | |
2001 | (if horizontal | |
2002 | (+ (window-left-column left) (window-total-size left t)) | |
2003 | (+ (window-top-line left) (window-total-size left))))) | |
2004 | ;; Shrink windows on right of LEFT. | |
2005 | (resize-other-windows | |
2006 | left delta horizontal nil 'after | |
2007 | (if horizontal | |
2008 | (window-left-column right) | |
2009 | (window-top-line right))))) | |
2010 | ((< delta 0) | |
2011 | (setq max-delta (window-max-delta-1 right 0 horizontal nil 'before)) | |
2012 | (setq min-delta (window-min-delta-1 left delta horizontal nil 'after)) | |
2013 | (when (or (< max-delta (- delta)) (> min-delta delta)) | |
2014 | ;; We can't get the whole DELTA - move as far as possible. | |
2015 | (setq delta (max (- max-delta) min-delta))) | |
2016 | (unless (zerop delta) | |
2017 | ;; Start resizing. | |
2018 | (resize-window-reset frame horizontal) | |
2019 | ;; Try to enlarge RIGHT. | |
2020 | (setq this-delta (window-resizable right (- delta) horizontal)) | |
2021 | (unless (zerop this-delta) | |
2022 | (resize-this-window | |
2023 | right this-delta horizontal nil t 'after | |
2024 | (if horizontal | |
2025 | (window-left-column right) | |
2026 | (window-top-line right)))) | |
2027 | ;; Shrink windows on left of RIGHT. | |
2028 | (resize-other-windows | |
2029 | right (- delta) horizontal nil 'before | |
2030 | (if horizontal | |
2031 | (+ (window-left-column left) (window-total-size left t)) | |
2032 | (+ (window-top-line left) (window-total-size left))))))) | |
2033 | (unless (zerop delta) | |
2034 | ;; Don't report an error in the standard case. | |
2035 | (unless (resize-window-apply frame horizontal) | |
2036 | ;; But do report an error if applying the changes fails. | |
2037 | (error "Failed adjusting window %s" window))))))) | |
2038 | ||
2039 | (defun enlarge-window (delta &optional horizontal) | |
2040 | "Make selected window DELTA lines taller. | |
2041 | Interactively, if no argument is given, make the selected window | |
2042 | one line taller. If optional argument HORIZONTAL is non-nil, | |
2043 | make selected window wider by DELTA columns. If DELTA is | |
2044 | negative, shrink selected window by -DELTA lines or columns. | |
2045 | Return nil." | |
2046 | (interactive "p") | |
2047 | (resize-window (selected-window) delta horizontal)) | |
2048 | ||
2049 | (defun shrink-window (delta &optional horizontal) | |
2050 | "Make selected window DELTA lines smaller. | |
2051 | Interactively, if no argument is given, make the selected window | |
2052 | one line smaller. If optional argument HORIZONTAL is non-nil, | |
2053 | make selected window narrower by DELTA columns. If DELTA is | |
2054 | negative, enlarge selected window by -DELTA lines or columns. | |
2055 | Return nil." | |
2056 | (interactive "p") | |
2057 | (resize-window (selected-window) (- delta) horizontal)) | |
2058 | ||
2059 | (defun maximize-window (&optional window) | |
2060 | "Maximize WINDOW. | |
2061 | Make WINDOW as large as possible without deleting any windows. | |
2062 | WINDOW can be any window and defaults to the selected window." | |
2063 | (interactive) | |
2064 | (setq window (normalize-any-window window)) | |
2065 | (resize-window window (window-max-delta window)) | |
2066 | (resize-window window (window-max-delta window t) t)) | |
2067 | ||
2068 | (defun minimize-window (&optional window) | |
2069 | "Minimize WINDOW. | |
2070 | Make WINDOW as small as possible without deleting any windows. | |
2071 | WINDOW can be any window and defaults to the selected window." | |
2072 | (interactive) | |
2073 | (setq window (normalize-any-window window)) | |
2074 | (resize-window window (- (window-min-delta window))) | |
2075 | (resize-window window (- (window-min-delta window t)) t)) | |
2076 | \f | |
9aab8e0d MR |
2077 | (defsubst frame-root-window-p (window) |
2078 | "Return non-nil if WINDOW is the root window of its frame." | |
2079 | (eq window (frame-root-window window))) | |
6198ccd0 MR |
2080 | |
2081 | (defun window-tree-1 (window &optional next) | |
2082 | "Return window tree rooted at WINDOW. | |
2083 | Optional argument NEXT non-nil means include windows right | |
2084 | siblings in the return value. | |
2085 | ||
2086 | See the documentation of `window-tree' for a description of the | |
2087 | return value." | |
2088 | (let (list) | |
2089 | (while window | |
2090 | (setq list | |
2091 | (cons | |
2092 | (cond | |
2093 | ((window-vchild window) | |
2094 | (cons t (cons (window-edges window) | |
2095 | (window-tree-1 (window-vchild window) t)))) | |
2096 | ((window-hchild window) | |
2097 | (cons nil (cons (window-edges window) | |
2098 | (window-tree-1 (window-hchild window) t)))) | |
2099 | (t window)) | |
2100 | list)) | |
2101 | (setq window (when next (window-next window)))) | |
2102 | (nreverse list))) | |
2103 | ||
2104 | (defun window-tree (&optional frame) | |
2105 | "Return the window tree of frame FRAME. | |
2106 | FRAME must be a live frame and defaults to the selected frame. | |
2107 | The return value is a list of the form (ROOT MINI), where ROOT | |
2108 | represents the window tree of the frame's root window, and MINI | |
2109 | is the frame's minibuffer window. | |
2110 | ||
2111 | If the root window is not split, ROOT is the root window itself. | |
2112 | Otherwise, ROOT is a list (DIR EDGES W1 W2 ...) where DIR is nil | |
2113 | for a horizontal split, and t for a vertical split. EDGES gives | |
2114 | the combined size and position of the subwindows in the split, | |
2115 | and the rest of the elements are the subwindows in the split. | |
2116 | Each of the subwindows may again be a window or a list | |
2117 | representing a window split, and so on. EDGES is a list \(LEFT | |
2118 | TOP RIGHT BOTTOM) as returned by `window-edges'." | |
2119 | (setq frame (normalize-live-frame frame)) | |
2120 | (window-tree-1 (frame-root-window frame) t)) | |
9aab8e0d | 2121 | \f |
9397e56f MR |
2122 | (defun other-window (count &optional all-frames) |
2123 | "Select another window in cyclic ordering of windows. | |
2124 | COUNT specifies the number of windows to skip, starting with the | |
2125 | selected window, before making the selection. If COUNT is | |
2126 | positive, skip COUNT windows forwards. If COUNT is negative, | |
2127 | skip -COUNT windows backwards. COUNT zero means do not skip any | |
2128 | window, so select the selected window. In an interactive call, | |
2129 | COUNT is the numeric prefix argument. Return nil. | |
2130 | ||
2131 | If the `other-window' parameter of WINDOW is a function and | |
2132 | `ignore-window-parameters' is nil, call that function with the | |
2133 | arguments COUNT and ALL-FRAMES. | |
2134 | ||
2135 | This function does not select a window whose `no-other-window' | |
2136 | window parameter is non-nil. | |
2137 | ||
2138 | This function uses `next-window' for finding the window to | |
2139 | select. The argument ALL-FRAMES has the same meaning as in | |
2140 | `next-window', but the MINIBUF argument of `next-window' is | |
2141 | always effectively nil." | |
2142 | (interactive "p") | |
2143 | (let* ((window (selected-window)) | |
2144 | (function (and (not ignore-window-parameters) | |
2145 | (window-parameter window 'other-window))) | |
2146 | old-window old-count) | |
2147 | (if (functionp function) | |
2148 | (funcall function count all-frames) | |
2149 | ;; `next-window' and `previous-window' may return a window we are | |
2150 | ;; not allowed to select. Hence we need an exit strategy in case | |
2151 | ;; all windows are non-selectable. | |
2152 | (catch 'exit | |
2153 | (while (> count 0) | |
2154 | (setq window (next-window window nil all-frames)) | |
2155 | (cond | |
2156 | ((eq window old-window) | |
2157 | (when (= count old-count) | |
2158 | ;; Keep out of infinite loops. When COUNT has not changed | |
2159 | ;; since we last looked at `window' we're probably in one. | |
2160 | (throw 'exit nil))) | |
2161 | ((window-parameter window 'no-other-window) | |
2162 | (unless old-window | |
2163 | ;; The first non-selectable window `next-window' got us: | |
2164 | ;; Remember it and the current value of COUNT. | |
2165 | (setq old-window window) | |
2166 | (setq old-count count))) | |
2167 | (t | |
2168 | (setq count (1- count))))) | |
2169 | (while (< count 0) | |
2170 | (setq window (previous-window window nil all-frames)) | |
2171 | (cond | |
2172 | ((eq window old-window) | |
2173 | (when (= count old-count) | |
2174 | ;; Keep out of infinite loops. When COUNT has not changed | |
2175 | ;; since we last looked at `window' we're probably in one. | |
2176 | (throw 'exit nil))) | |
2177 | ((window-parameter window 'no-other-window) | |
2178 | (unless old-window | |
2179 | ;; The first non-selectable window `previous-window' got | |
2180 | ;; us: Remember it and the current value of COUNT. | |
2181 | (setq old-window window) | |
2182 | (setq old-count count))) | |
2183 | (t | |
2184 | (setq count (1+ count))))) | |
2185 | ||
2186 | (select-window window) | |
2187 | ;; Always return nil. | |
2188 | nil)))) | |
2189 | ||
387522b2 MR |
2190 | ;; This should probably return non-nil when the selected window is part |
2191 | ;; of an atomic window whose root is the frame's root window. | |
2192 | (defun one-window-p (&optional nomini all-frames) | |
2193 | "Return non-nil if the selected window is the only window. | |
2194 | Optional arg NOMINI non-nil means don't count the minibuffer | |
2195 | even if it is active. Otherwise, the minibuffer is counted | |
2196 | when it is active. | |
2197 | ||
2198 | Optional argument ALL-FRAMES specifies the set of frames to | |
2199 | consider, see also `next-window'. ALL-FRAMES nil or omitted | |
2200 | means consider windows on the selected frame only, plus the | |
2201 | minibuffer window if specified by the NOMINI argument. If the | |
2202 | minibuffer counts, consider all windows on all frames that share | |
2203 | that minibuffer too. The remaining non-nil values of ALL-FRAMES | |
2204 | with a special meaning are: | |
2205 | ||
2206 | - t means consider all windows on all existing frames. | |
2207 | ||
2208 | - `visible' means consider all windows on all visible frames on | |
2209 | the current terminal. | |
2210 | ||
2211 | - 0 (the number zero) means consider all windows on all visible | |
2212 | and iconified frames on the current terminal. | |
2213 | ||
2214 | - A frame means consider all windows on that frame only. | |
2215 | ||
2216 | Anything else means consider all windows on the selected frame | |
2217 | and no others." | |
2218 | (let ((base-window (selected-window))) | |
2219 | (if (and nomini (eq base-window (minibuffer-window))) | |
2220 | (setq base-window (next-window base-window))) | |
2221 | (eq base-window | |
2222 | (next-window base-window (if nomini 'arg) all-frames)))) | |
3c448ab6 | 2223 | \f |
9aab8e0d MR |
2224 | ;;; Deleting windows. |
2225 | (defun window-deletable-p (&optional window) | |
2226 | "Return t if WINDOW can be safely deleted from its frame. | |
2227 | Return `frame' if deleting WINDOW should delete its frame | |
2228 | instead." | |
2229 | (setq window (normalize-any-window window)) | |
2230 | (unless ignore-window-parameters | |
2231 | ;; Handle atomicity. | |
2232 | (when (window-parameter window 'window-atom) | |
2233 | (setq window (window-atom-root window)))) | |
2234 | (let ((parent (window-parent window)) | |
2235 | (frame (window-frame window)) | |
2236 | (dedicated (and (window-buffer window) (window-dedicated-p window))) | |
2237 | (quit-restore (window-parameter window 'quit-restore))) | |
2238 | (cond | |
2239 | ((frame-root-window-p window) | |
2240 | (when (and (or dedicated | |
2241 | (and (eq (car-safe quit-restore) 'new-frame) | |
2242 | (eq (nth 1 quit-restore) (window-buffer window)))) | |
2243 | (other-visible-frames-p frame)) | |
2244 | ;; WINDOW is the root window of its frame. Return `frame' but | |
2245 | ;; only if WINDOW is (1) either dedicated or quit-restore's car | |
2246 | ;; is new-frame and the window still displays the same buffer | |
2247 | ;; and (2) there are other frames left. | |
2248 | 'frame)) | |
2249 | ((and (not ignore-window-parameters) | |
2250 | (eq (window-parameter window 'window-side) 'none) | |
2251 | (or (not parent) | |
2252 | (not (eq (window-parameter parent 'window-side) 'none)))) | |
2253 | ;; Can't delete last main window. | |
2254 | nil) | |
2255 | (t)))) | |
2256 | ||
2257 | (defun window-or-subwindow-p (subwindow window) | |
2258 | "Return t if SUBWINDOW is either WINDOW or a subwindow of WINDOW." | |
2259 | (or (eq subwindow window) | |
2260 | (let ((parent (window-parent subwindow))) | |
2261 | (catch 'done | |
2262 | (while parent | |
2263 | (if (eq parent window) | |
2264 | (throw 'done t) | |
2265 | (setq parent (window-parent parent)))))))) | |
2266 | ||
562dd5e9 MR |
2267 | (defun delete-window (&optional window) |
2268 | "Delete WINDOW. | |
2269 | WINDOW can be an arbitrary window and defaults to the selected | |
2270 | one. Return nil. | |
2271 | ||
2272 | If the variable `ignore-window-parameters' is non-nil or the | |
2273 | `delete-window' parameter of WINDOW equals t, do not process any | |
2274 | parameters of WINDOW. Otherwise, if the `delete-window' | |
2275 | parameter of WINDOW specifies a function, call that function with | |
2276 | WINDOW as its sole argument and return the value returned by that | |
2277 | function. | |
2278 | ||
2279 | Otherwise, if WINDOW is part of an atomic window, call | |
2280 | `delete-window' with the root of the atomic window as its | |
2281 | argument. If WINDOW is the only window on its frame or the last | |
2282 | non-side window, signal an error." | |
2283 | (interactive) | |
2284 | (setq window (normalize-any-window window)) | |
2285 | (let* ((frame (window-frame window)) | |
2286 | (function (window-parameter window 'delete-window)) | |
2287 | (parent (window-parent window)) | |
2288 | atom-root) | |
2289 | (window-check frame) | |
2290 | (catch 'done | |
2291 | ;; Handle window parameters. | |
2292 | (cond | |
2293 | ;; Ignore window parameters if `ignore-window-parameters' tells | |
2294 | ;; us so or `delete-window' equals t. | |
2295 | ((or ignore-window-parameters (eq function t))) | |
2296 | ((functionp function) | |
2297 | ;; The `delete-window' parameter specifies the function to call. | |
2298 | ;; If that function is `ignore' nothing is done. It's up to the | |
2299 | ;; function called here to avoid infinite recursion. | |
2300 | (throw 'done (funcall function window))) | |
2301 | ((and (window-parameter window 'window-atom) | |
2302 | (setq atom-root (window-atom-root window)) | |
2303 | (not (eq atom-root window))) | |
2304 | (throw 'done (delete-window atom-root))) | |
2305 | ((and (eq (window-parameter window 'window-side) 'none) | |
2306 | (or (not parent) | |
2307 | (not (eq (window-parameter parent 'window-side) 'none)))) | |
2308 | (error "Attempt to delete last non-side window")) | |
2309 | ((not parent) | |
2310 | (error "Attempt to delete minibuffer or sole ordinary window"))) | |
2311 | ||
2312 | (let* ((horizontal (window-hchild parent)) | |
2313 | (size (window-total-size window horizontal)) | |
2314 | (frame-selected | |
2315 | (window-or-subwindow-p (frame-selected-window frame) window)) | |
2316 | ;; Emacs 23 preferably gives WINDOW's space to its left | |
2317 | ;; sibling. | |
2318 | (sibling (or (window-left window) (window-right window)))) | |
2319 | (resize-window-reset frame horizontal) | |
2320 | (cond | |
2321 | ((and (not (window-splits window)) | |
2322 | sibling (window-sizable-p sibling size)) | |
2323 | ;; Resize WINDOW's sibling. | |
2324 | (resize-this-window sibling size horizontal nil t) | |
2325 | (set-window-new-normal | |
2326 | sibling (+ (window-normal-size sibling horizontal) | |
2327 | (window-normal-size window horizontal)))) | |
2328 | ((window-resizable-p window (- size) horizontal nil nil nil t) | |
2329 | ;; Can do without resizing fixed-size windows. | |
2330 | (resize-other-windows window (- size) horizontal)) | |
2331 | (t | |
2332 | ;; Can't do without resizing fixed-size windows. | |
2333 | (resize-other-windows window (- size) horizontal t))) | |
2334 | ;; Actually delete WINDOW. | |
2335 | (delete-window-internal window) | |
2336 | (when (and frame-selected | |
2337 | (window-parameter | |
2338 | (frame-selected-window frame) 'no-other-window)) | |
2339 | ;; `delete-window-internal' has selected a window that should | |
2340 | ;; not be selected, fix this here. | |
2341 | (other-window -1 frame)) | |
2342 | (run-window-configuration-change-hook frame) | |
2343 | (window-check frame) | |
2344 | ;; Always return nil. | |
2345 | nil)))) | |
2346 | ||
2347 | (defun delete-other-windows (&optional window) | |
2348 | "Make WINDOW fill its frame. | |
2349 | WINDOW may be any window and defaults to the selected one. | |
2350 | Return nil. | |
2351 | ||
2352 | If the variable `ignore-window-parameters' is non-nil or the | |
2353 | `delete-other-windows' parameter of WINDOW equals t, do not | |
2354 | process any parameters of WINDOW. Otherwise, if the | |
2355 | `delete-other-windows' parameter of WINDOW specifies a function, | |
2356 | call that function with WINDOW as its sole argument and return | |
2357 | the value returned by that function. | |
2358 | ||
2359 | Otherwise, if WINDOW is part of an atomic window, call this | |
2360 | function with the root of the atomic window as its argument. If | |
2361 | WINDOW is a non-side window, make WINDOW the only non-side window | |
2362 | on the frame. Side windows are not deleted. If WINDOW is a side | |
2363 | window signal an error." | |
2364 | (interactive) | |
2365 | (setq window (normalize-any-window window)) | |
2366 | (let* ((frame (window-frame window)) | |
2367 | (function (window-parameter window 'delete-other-windows)) | |
2368 | (window-side (window-parameter window 'window-side)) | |
2369 | atom-root side-main) | |
2370 | (window-check frame) | |
2371 | (catch 'done | |
2372 | (cond | |
2373 | ;; Ignore window parameters if `ignore-window-parameters' is t or | |
2374 | ;; `delete-other-windows' is t. | |
2375 | ((or ignore-window-parameters (eq function t))) | |
2376 | ((functionp function) | |
2377 | ;; The `delete-other-windows' parameter specifies the function | |
2378 | ;; to call. If the function is `ignore' no windows are deleted. | |
2379 | ;; It's up to the function called to avoid infinite recursion. | |
2380 | (throw 'done (funcall function window))) | |
2381 | ((and (window-parameter window 'window-atom) | |
2382 | (setq atom-root (window-atom-root window)) | |
2383 | (not (eq atom-root window))) | |
2384 | (throw 'done (delete-other-windows atom-root))) | |
2385 | ((eq window-side 'none) | |
2386 | ;; Set side-main to the major non-side window. | |
2387 | (setq side-main (window-with-parameter 'window-side 'none nil t))) | |
2388 | ((memq window-side window-sides) | |
2389 | (error "Cannot make side window the only window"))) | |
2390 | ;; If WINDOW is the main non-side window, do nothing. | |
2391 | (unless (eq window side-main) | |
2392 | (delete-other-windows-internal window side-main) | |
2393 | (run-window-configuration-change-hook frame) | |
2394 | (window-check frame)) | |
2395 | ;; Always return nil. | |
2396 | nil))) | |
9397e56f MR |
2397 | |
2398 | (defun delete-other-windows-vertically (&optional window) | |
2399 | "Delete the windows in the same column with WINDOW, but not WINDOW itself. | |
2400 | This may be a useful alternative binding for \\[delete-other-windows] | |
2401 | if you often split windows horizontally." | |
2402 | (interactive) | |
2403 | (let* ((window (or window (selected-window))) | |
2404 | (edges (window-edges window)) | |
2405 | (w window) delenda) | |
2406 | (while (not (eq (setq w (next-window w 1)) window)) | |
2407 | (let ((e (window-edges w))) | |
2408 | (when (and (= (car e) (car edges)) | |
2409 | (= (caddr e) (caddr edges))) | |
2410 | (push w delenda)))) | |
2411 | (mapc 'delete-window delenda))) | |
2412 | ||
2413 | ;;; Windows and buffers. | |
2414 | ||
2415 | ;; `prev-buffers' and `next-buffers' are two reserved window slots used | |
2416 | ;; for (1) determining which buffer to show in the window when its | |
2417 | ;; buffer shall be buried or killed and (2) which buffer to show for | |
2418 | ;; `switch-to-prev-buffer' and `switch-to-next-buffer'. | |
2419 | ||
2420 | ;; `prev-buffers' consists of <buffer, window-start, window-point> | |
2421 | ;; triples. The entries on this list are ordered by the time their | |
2422 | ;; buffer has been removed from the window, the most recently removed | |
2423 | ;; buffer's entry being first. The window-start and window-point | |
2424 | ;; components are `window-start' and `window-point' at the time the | |
2425 | ;; buffer was removed from the window which implies that the entry must | |
2426 | ;; be added when `set-window-buffer' removes the buffer from the window. | |
2427 | ||
2428 | ;; `next-buffers' is the list of buffers that have been replaced | |
2429 | ;; recently by `switch-to-prev-buffer'. These buffers are the least | |
2430 | ;; preferred candidates of `switch-to-prev-buffer' and the preferred | |
2431 | ;; candidates of `switch-to-next-buffer' to switch to. This list is | |
2432 | ;; reset to nil by any action changing the window's buffer with the | |
2433 | ;; exception of `switch-to-prev-buffer' and `switch-to-next-buffer'. | |
2434 | ;; `switch-to-prev-buffer' pushes the buffer it just replaced on it, | |
2435 | ;; `switch-to-next-buffer' pops the last pushed buffer from it. | |
2436 | ||
2437 | ;; Both `prev-buffers' and `next-buffers' may reference killed buffers | |
2438 | ;; if such a buffer was killed while the window was hidden within a | |
2439 | ;; window configuration. Such killed buffers get removed whenever | |
2440 | ;; `switch-to-prev-buffer' or `switch-to-next-buffer' encounter them. | |
2441 | ||
2442 | ;; The following function is called by `set-window-buffer' _before_ it | |
2443 | ;; replaces the buffer of the argument window with the new buffer. | |
2444 | (defun record-window-buffer (&optional window) | |
2445 | "Record WINDOW's buffer. | |
2446 | WINDOW must be a live window and defaults to the selected one." | |
2447 | (let* ((window (normalize-live-window window)) | |
2448 | (buffer (window-buffer window)) | |
2449 | (entry (assq buffer (window-prev-buffers window)))) | |
2450 | ;; Reset WINDOW's next buffers. If needed, they are resurrected by | |
2451 | ;; `switch-to-prev-buffer' and `switch-to-next-buffer'. | |
2452 | (set-window-next-buffers window nil) | |
2453 | ||
2454 | (when entry | |
2455 | ;; Remove all entries for BUFFER from WINDOW's previous buffers. | |
2456 | (set-window-prev-buffers | |
2457 | window (assq-delete-all buffer (window-prev-buffers window)))) | |
2458 | ||
2459 | ;; Don't record insignificant buffers. | |
2460 | (unless (eq (aref (buffer-name buffer) 0) ?\s) | |
2461 | ;; Add an entry for buffer to WINDOW's previous buffers. | |
2462 | (with-current-buffer buffer | |
2463 | (let ((start (window-start window)) | |
2464 | (point (window-point window))) | |
2465 | (setq entry | |
2466 | (cons buffer | |
2467 | (if entry | |
2468 | ;; We have an entry, update marker positions. | |
2469 | (list (set-marker (nth 1 entry) start) | |
2470 | (set-marker (nth 2 entry) point)) | |
2471 | ;; Make new markers. | |
2472 | (list (copy-marker start) | |
2473 | (copy-marker point))))) | |
2474 | ||
2475 | (set-window-prev-buffers | |
2476 | window (cons entry (window-prev-buffers window)))))))) | |
2477 | ||
2478 | (defun unrecord-window-buffer (&optional window buffer) | |
2479 | "Unrecord BUFFER in WINDOW. | |
2480 | WINDOW must be a live window and defaults to the selected one. | |
2481 | BUFFER must be a live buffer and defaults to the buffer of | |
2482 | WINDOW." | |
2483 | (let* ((window (normalize-live-window window)) | |
2484 | (buffer (or buffer (window-buffer window)))) | |
2485 | (set-window-prev-buffers | |
2486 | window (assq-delete-all buffer (window-prev-buffers window))) | |
2487 | (set-window-next-buffers | |
2488 | window (delq buffer (window-next-buffers window))))) | |
2489 | ||
2490 | (defun set-window-buffer-start-and-point (window buffer &optional start point) | |
2491 | "Set WINDOW's buffer to BUFFER. | |
2492 | Optional argument START non-nil means set WINDOW's start position | |
2493 | to START. Optional argument POINT non-nil means set WINDOW's | |
2494 | point to POINT. If WINDOW is selected this also sets BUFFER's | |
2495 | `point' to POINT. If WINDOW is selected and the buffer it showed | |
2496 | before was current this also makes BUFFER the current buffer." | |
2497 | (let ((selected (eq window (selected-window))) | |
2498 | (current (eq (window-buffer window) (current-buffer)))) | |
2499 | (set-window-buffer window buffer) | |
2500 | (when (and selected current) | |
2501 | (set-buffer buffer)) | |
2502 | (when start | |
2503 | (set-window-start window start)) | |
2504 | (when point | |
2505 | (if selected | |
2506 | (with-current-buffer buffer | |
2507 | (goto-char point)) | |
2508 | (set-window-point window point))))) | |
2509 | ||
2510 | (defun switch-to-prev-buffer (&optional window bury-or-kill) | |
2511 | "In WINDOW switch to previous buffer. | |
2512 | WINDOW must be a live window and defaults to the selected one. | |
2513 | ||
2514 | Optional argument BURY-OR-KILL non-nil means the buffer currently | |
2515 | shown in WINDOW is about to be buried or killed and consequently | |
2516 | shall not be switched to in future invocations of this command." | |
2517 | (interactive) | |
2518 | (let* ((window (normalize-live-window window)) | |
2519 | (old-buffer (window-buffer window)) | |
2520 | ;; Save this since it's destroyed by `set-window-buffer'. | |
2521 | (next-buffers (window-next-buffers window)) | |
2522 | entry new-buffer killed-buffers deletable visible) | |
2523 | (cond | |
2524 | ;; When BURY-OR-KILL is non-nil, there's no previous buffer for | |
2525 | ;; this window, and we can delete the window (or the frame) do | |
2526 | ;; that. | |
2527 | ((and bury-or-kill | |
2528 | (or (not (window-prev-buffers window)) | |
2529 | (and (eq (caar (window-prev-buffers window)) old-buffer) | |
2530 | (not (cdr (car (window-prev-buffers window)))))) | |
2531 | (setq deletable (window-deletable-p window))) | |
2532 | (if (eq deletable 'frame) | |
2533 | (delete-frame (window-frame window)) | |
2534 | (delete-window window))) | |
2535 | ((window-dedicated-p window) | |
2536 | (error "Window %s is dedicated to buffer %s" window old-buffer))) | |
2537 | ||
2538 | (unless deletable | |
2539 | (catch 'found | |
2540 | ;; Scan WINDOW's previous buffers first, skipping entries of next | |
2541 | ;; buffers. | |
2542 | (dolist (entry (window-prev-buffers window)) | |
2543 | (when (and (setq new-buffer (car entry)) | |
2544 | (or (buffer-live-p new-buffer) | |
2545 | (not (setq killed-buffers | |
2546 | (cons new-buffer killed-buffers)))) | |
2547 | (not (eq new-buffer old-buffer)) | |
2548 | (or bury-or-kill | |
2549 | (not (memq new-buffer next-buffers)))) | |
2550 | (set-window-buffer-start-and-point | |
2551 | window new-buffer (nth 1 entry) (nth 2 entry)) | |
2552 | (throw 'found t))) | |
2553 | ;; Scan reverted buffer list of WINDOW's frame next, skipping | |
2554 | ;; entries of next buffers. Note that when we bury or kill a | |
2555 | ;; buffer we don't reverse the global buffer list to avoid showing | |
2556 | ;; a buried buffer instead. Otherwise, we must reverse the global | |
2557 | ;; buffer list in order to make sure that switching to the | |
2558 | ;; previous/next buffer traverse it in opposite directions. | |
2559 | (dolist (buffer (if bury-or-kill | |
2560 | (buffer-list (window-frame window)) | |
2561 | (nreverse (buffer-list (window-frame window))))) | |
2562 | (when (and (buffer-live-p buffer) | |
2563 | (not (eq buffer old-buffer)) | |
2564 | (not (eq (aref (buffer-name buffer) 0) ?\s)) | |
2565 | (or bury-or-kill (not (memq buffer next-buffers)))) | |
2566 | (if (get-buffer-window buffer) | |
2567 | ;; Try to avoid showing a buffer visible in some other window. | |
2568 | (setq visible buffer) | |
2569 | (setq new-buffer buffer) | |
2570 | (set-window-buffer-start-and-point window new-buffer) | |
2571 | (throw 'found t)))) | |
2572 | (unless bury-or-kill | |
2573 | ;; Scan reverted next buffers last (must not use nreverse | |
2574 | ;; here!). | |
2575 | (dolist (buffer (reverse next-buffers)) | |
2576 | ;; Actually, buffer _must_ be live here since otherwise it | |
2577 | ;; would have been caught in the scan of previous buffers. | |
2578 | (when (and (or (buffer-live-p buffer) | |
2579 | (not (setq killed-buffers | |
2580 | (cons buffer killed-buffers)))) | |
2581 | (not (eq buffer old-buffer)) | |
2582 | (setq entry (assq buffer (window-prev-buffers window)))) | |
2583 | (setq new-buffer buffer) | |
2584 | (set-window-buffer-start-and-point | |
2585 | window new-buffer (nth 1 entry) (nth 2 entry)) | |
2586 | (throw 'found t)))) | |
2587 | ||
2588 | ;; Show a buffer visible in another window. | |
2589 | (when visible | |
2590 | (setq new-buffer visible) | |
2591 | (set-window-buffer-start-and-point window new-buffer))) | |
2592 | ||
2593 | (if bury-or-kill | |
2594 | ;; Remove `old-buffer' from WINDOW's previous and (restored list | |
2595 | ;; of) next buffers. | |
2596 | (progn | |
2597 | (set-window-prev-buffers | |
2598 | window (assq-delete-all old-buffer (window-prev-buffers window))) | |
2599 | (set-window-next-buffers window (delq old-buffer next-buffers))) | |
2600 | ;; Move `old-buffer' to head of WINDOW's restored list of next | |
2601 | ;; buffers. | |
2602 | (set-window-next-buffers | |
2603 | window (cons old-buffer (delq old-buffer next-buffers))))) | |
2604 | ||
2605 | ;; Remove killed buffers from WINDOW's previous and next buffers. | |
2606 | (when killed-buffers | |
2607 | (dolist (buffer killed-buffers) | |
2608 | (set-window-prev-buffers | |
2609 | window (assq-delete-all buffer (window-prev-buffers window))) | |
2610 | (set-window-next-buffers | |
2611 | window (delq buffer (window-next-buffers window))))) | |
2612 | ||
2613 | ;; Return new-buffer. | |
2614 | new-buffer)) | |
2615 | ||
2616 | (defun switch-to-next-buffer (&optional window) | |
2617 | "In WINDOW switch to next buffer. | |
2618 | WINDOW must be a live window and defaults to the selected one." | |
2619 | (interactive) | |
2620 | (let* ((window (normalize-live-window window)) | |
2621 | (old-buffer (window-buffer window)) | |
2622 | (next-buffers (window-next-buffers window)) | |
2623 | new-buffer entry killed-buffers visible) | |
2624 | (when (window-dedicated-p window) | |
2625 | (error "Window %s is dedicated to buffer %s" window old-buffer)) | |
2626 | ||
2627 | (catch 'found | |
2628 | ;; Scan WINDOW's next buffers first. | |
2629 | (dolist (buffer next-buffers) | |
2630 | (when (and (or (buffer-live-p buffer) | |
2631 | (not (setq killed-buffers | |
2632 | (cons buffer killed-buffers)))) | |
2633 | (not (eq buffer old-buffer)) | |
2634 | (setq entry (assq buffer (window-prev-buffers window)))) | |
2635 | (setq new-buffer buffer) | |
2636 | (set-window-buffer-start-and-point | |
2637 | window new-buffer (nth 1 entry) (nth 2 entry)) | |
2638 | (throw 'found t))) | |
2639 | ;; Scan the buffer list of WINDOW's frame next, skipping previous | |
2640 | ;; buffers entries. | |
2641 | (dolist (buffer (buffer-list (window-frame window))) | |
2642 | (when (and (buffer-live-p buffer) (not (eq buffer old-buffer)) | |
2643 | (not (eq (aref (buffer-name buffer) 0) ?\s)) | |
2644 | (not (assq buffer (window-prev-buffers window)))) | |
2645 | (if (get-buffer-window buffer) | |
2646 | ;; Try to avoid showing a buffer visible in some other window. | |
2647 | (setq visible buffer) | |
2648 | (setq new-buffer buffer) | |
2649 | (set-window-buffer-start-and-point window new-buffer) | |
2650 | (throw 'found t)))) | |
2651 | ;; Scan WINDOW's reverted previous buffers last (must not use | |
2652 | ;; nreverse here!) | |
2653 | (dolist (entry (reverse (window-prev-buffers window))) | |
2654 | (when (and (setq new-buffer (car entry)) | |
2655 | (or (buffer-live-p new-buffer) | |
2656 | (not (setq killed-buffers | |
2657 | (cons new-buffer killed-buffers)))) | |
2658 | (not (eq new-buffer old-buffer))) | |
2659 | (set-window-buffer-start-and-point | |
2660 | window new-buffer (nth 1 entry) (nth 2 entry)) | |
2661 | (throw 'found t))) | |
2662 | ||
2663 | ;; Show a buffer visible in another window. | |
2664 | (when visible | |
2665 | (setq new-buffer visible) | |
2666 | (set-window-buffer-start-and-point window new-buffer))) | |
2667 | ||
2668 | ;; Remove `new-buffer' from and restore WINDOW's next buffers. | |
2669 | (set-window-next-buffers window (delq new-buffer next-buffers)) | |
2670 | ||
2671 | ;; Remove killed buffers from WINDOW's previous and next buffers. | |
2672 | (when killed-buffers | |
2673 | (dolist (buffer killed-buffers) | |
2674 | (set-window-prev-buffers | |
2675 | window (assq-delete-all buffer (window-prev-buffers window))) | |
2676 | (set-window-next-buffers | |
2677 | window (delq buffer (window-next-buffers window))))) | |
2678 | ||
2679 | ;; Return new-buffer. | |
2680 | new-buffer)) | |
2681 | ||
2682 | (defun get-next-valid-buffer (list &optional buffer visible-ok frame) | |
2683 | "Search LIST for a valid buffer to display in FRAME. | |
2684 | Return nil when all buffers in LIST are undesirable for display, | |
2685 | otherwise return the first suitable buffer in LIST. | |
2686 | ||
2687 | Buffers not visible in windows are preferred to visible buffers, | |
2688 | unless VISIBLE-OK is non-nil. | |
2689 | If the optional argument FRAME is nil, it defaults to the selected frame. | |
2690 | If BUFFER is non-nil, ignore occurrences of that buffer in LIST." | |
2691 | ;; This logic is more or less copied from other-buffer. | |
2692 | (setq frame (or frame (selected-frame))) | |
2693 | (let ((pred (frame-parameter frame 'buffer-predicate)) | |
2694 | found buf) | |
2695 | (while (and (not found) list) | |
2696 | (setq buf (car list)) | |
2697 | (if (and (not (eq buffer buf)) | |
2698 | (buffer-live-p buf) | |
2699 | (or (null pred) (funcall pred buf)) | |
2700 | (not (eq (aref (buffer-name buf) 0) ?\s)) | |
2701 | (or visible-ok (null (get-buffer-window buf 'visible)))) | |
2702 | (setq found buf) | |
2703 | (setq list (cdr list)))) | |
2704 | (car list))) | |
2705 | ||
2706 | (defun last-buffer (&optional buffer visible-ok frame) | |
2707 | "Return the last buffer in FRAME's buffer list. | |
2708 | If BUFFER is the last buffer, return the preceding buffer | |
2709 | instead. Buffers not visible in windows are preferred to visible | |
2710 | buffers, unless optional argument VISIBLE-OK is non-nil. | |
2711 | Optional third argument FRAME nil or omitted means use the | |
2712 | selected frame's buffer list. If no such buffer exists, return | |
2713 | the buffer `*scratch*', creating it if necessary." | |
2714 | (setq frame (or frame (selected-frame))) | |
2715 | (or (get-next-valid-buffer (nreverse (buffer-list frame)) | |
2716 | buffer visible-ok frame) | |
2717 | (get-buffer "*scratch*") | |
2718 | (let ((scratch (get-buffer-create "*scratch*"))) | |
2719 | (set-buffer-major-mode scratch) | |
2720 | scratch))) | |
2721 | ||
2722 | (defun bury-buffer (&optional buffer-or-name) | |
2723 | "Put BUFFER-OR-NAME at the end of the list of all buffers. | |
2724 | There it is the least likely candidate for `other-buffer' to | |
2725 | return; thus, the least likely buffer for \\[switch-to-buffer] to | |
2726 | select by default. | |
2727 | ||
2728 | You can specify a buffer name as BUFFER-OR-NAME, or an actual | |
2729 | buffer object. If BUFFER-OR-NAME is nil or omitted, bury the | |
2730 | current buffer. Also, if BUFFER-OR-NAME is nil or omitted, | |
2731 | remove the current buffer from the selected window if it is | |
2732 | displayed there." | |
2733 | (interactive) | |
2734 | (let* ((buffer (normalize-live-buffer buffer-or-name))) | |
2735 | ;; If `buffer-or-name' is not on the selected frame we unrecord it | |
2736 | ;; although it's not "here" (call it a feature). | |
2737 | (unrecord-buffer buffer) | |
2738 | ;; Handle case where `buffer-or-name' is nil and the current buffer | |
2739 | ;; is shown in the selected window. | |
2740 | (cond | |
2741 | ((or buffer-or-name (not (eq buffer (window-buffer))))) | |
2742 | ((not (window-dedicated-p)) | |
2743 | (switch-to-prev-buffer nil 'bury)) | |
2744 | ((frame-root-window-p (selected-window)) | |
2745 | (iconify-frame (window-frame (selected-window)))) | |
2746 | ((window-deletable-p) | |
2747 | (delete-window))) | |
2748 | ;; Always return nil. | |
2749 | nil)) | |
2750 | ||
2751 | (defun unbury-buffer () | |
2752 | "Switch to the last buffer in the buffer list." | |
2753 | (interactive) | |
2754 | (switch-to-buffer (last-buffer))) | |
2755 | ||
2756 | (defun next-buffer () | |
2757 | "In selected window switch to next buffer." | |
2758 | (interactive) | |
2759 | (switch-to-next-buffer)) | |
2760 | ||
2761 | (defun previous-buffer () | |
2762 | "In selected window switch to previous buffer." | |
2763 | (interactive) | |
2764 | (switch-to-prev-buffer)) | |
2765 | ||
2766 | (defun delete-windows-on (&optional buffer-or-name frame) | |
2767 | "Delete all windows showing BUFFER-OR-NAME. | |
2768 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer | |
2769 | and defaults to the current buffer. | |
2770 | ||
2771 | The following non-nil values of the optional argument FRAME | |
2772 | have special meanings: | |
2773 | ||
2774 | - t means consider all windows on the selected frame only. | |
2775 | ||
2776 | - `visible' means consider all windows on all visible frames on | |
2777 | the current terminal. | |
2778 | ||
2779 | - 0 (the number zero) means consider all windows on all visible | |
2780 | and iconified frames on the current terminal. | |
2781 | ||
2782 | - A frame means consider all windows on that frame only. | |
2783 | ||
2784 | Any other value of FRAME means consider all windows on all | |
2785 | frames. | |
2786 | ||
2787 | When a window showing BUFFER-OR-NAME is dedicated and the only | |
2788 | window of its frame, that frame is deleted when there are other | |
2789 | frames left." | |
2790 | (interactive "BDelete windows on (buffer):\nP") | |
2791 | (let ((buffer (normalize-live-buffer buffer-or-name)) | |
2792 | ;; Handle the "inverted" meaning of the FRAME argument wrt other | |
2793 | ;; `window-list-1' based function. | |
2794 | (all-frames (cond ((not frame) t) ((eq frame t) nil) (t frame)))) | |
2795 | (dolist (window (window-list-1 nil nil all-frames)) | |
2796 | (if (eq (window-buffer window) buffer) | |
2797 | (let ((deletable (window-deletable-p window))) | |
2798 | (cond | |
2799 | ((eq deletable 'frame) | |
2800 | ;; Delete frame. | |
2801 | (delete-frame (window-frame window))) | |
2802 | (deletable | |
2803 | ;; Delete window only. | |
2804 | (delete-window window)) | |
2805 | (t | |
2806 | ;; In window switch to previous buffer. | |
2807 | (set-window-dedicated-p window nil) | |
2808 | (switch-to-prev-buffer window 'bury)))) | |
2809 | ;; If a window doesn't show BUFFER, unrecord BUFFER in it. | |
2810 | (unrecord-window-buffer window buffer))))) | |
2811 | ||
2812 | (defun replace-buffer-in-windows (&optional buffer-or-name) | |
2813 | "Replace BUFFER-OR-NAME with some other buffer in all windows showing it. | |
2814 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer | |
2815 | and defaults to the current buffer. | |
2816 | ||
2817 | When a window showing BUFFER-OR-NAME is either dedicated, or the | |
2818 | window has no previous buffer, that window is deleted. If that | |
2819 | window is the only window on its frame, the frame is deleted too | |
2820 | when there are other frames left. If there are no other frames | |
2821 | left, some other buffer is displayed in that window. | |
2822 | ||
2823 | This function removes the buffer denoted by BUFFER-OR-NAME from | |
2824 | all window-local buffer lists." | |
2825 | (let ((buffer (normalize-live-buffer buffer-or-name))) | |
2826 | (dolist (window (window-list-1 nil nil t)) | |
2827 | (if (eq (window-buffer window) buffer) | |
2828 | (let ((deletable (window-deletable-p window))) | |
2829 | (cond | |
2830 | ((eq deletable 'frame) | |
2831 | ;; Delete frame. | |
2832 | (delete-frame (window-frame window))) | |
2833 | ((and (window-dedicated-p window) deletable) | |
2834 | ;; Delete window. | |
2835 | (delete-window window)) | |
2836 | (t | |
2837 | ;; Switch to another buffer in window. | |
2838 | (set-window-dedicated-p window nil) | |
2839 | (switch-to-prev-buffer window 'kill)))) | |
2840 | ;; Unrecord BUFFER in WINDOW. | |
2841 | (unrecord-window-buffer window buffer))))) | |
2842 | ||
2843 | (defun quit-restore-window (&optional window kill) | |
2844 | "Quit WINDOW in some way. | |
2845 | WINDOW must be a live window and defaults to the selected window. | |
2846 | Return nil. | |
2847 | ||
2848 | According to information stored in WINDOW's `quit-restore' window | |
2849 | parameter either \(1) delete WINDOW and its frame, \(2) delete | |
2850 | WINDOW, \(3) restore the buffer previously displayed in WINDOW, | |
2851 | or \(4) make WINDOW display some other buffer than the present | |
2852 | one. If non-nil, reset `quit-restore' parameter to nil. | |
2853 | ||
2854 | Optional argument KILL non-nil means in addition kill WINDOW's | |
2855 | buffer. If KILL is nil, put WINDOW's buffer at the end of the | |
2856 | buffer list. Interactively, KILL is the prefix argument." | |
2857 | (interactive "i\nP") | |
2858 | (setq window (normalize-live-window window)) | |
2859 | (let ((buffer (window-buffer window)) | |
2860 | (quit-restore (window-parameter window 'quit-restore)) | |
2861 | deletable resize) | |
2862 | (cond | |
2863 | ((and (or (and (memq (car-safe quit-restore) '(new-window new-frame)) | |
2864 | ;; Check that WINDOW's buffer is still the same. | |
2865 | (eq (window-buffer window) (nth 1 quit-restore))) | |
2866 | (window-dedicated-p window)) | |
2867 | (setq deletable (window-deletable-p window))) | |
2868 | ;; WINDOW can be deleted. | |
2869 | (unrecord-buffer buffer) | |
2870 | (if (eq deletable 'frame) | |
2871 | ;; WINDOW's frame can be deleted. | |
2872 | (delete-frame (window-frame window)) | |
2873 | ;; Just delete WINDOW. | |
2874 | (delete-window window)) | |
2875 | ;; If the previously selected window is still alive, select it. | |
2876 | (when (window-live-p (nth 2 quit-restore)) | |
2877 | (select-window (nth 2 quit-restore)))) | |
2878 | ((and (buffer-live-p (nth 0 quit-restore)) | |
2879 | ;; The buffer currently shown in WINDOW must still be the | |
2880 | ;; buffer shown when its `quit-restore' parameter was created | |
2881 | ;; in the first place. | |
2882 | (eq (window-buffer window) (nth 3 quit-restore))) | |
2883 | (setq resize (with-current-buffer buffer temp-buffer-resize-mode)) | |
2884 | ;; Unrecord buffer. | |
2885 | (unrecord-buffer buffer) | |
2886 | (unrecord-window-buffer window buffer) | |
2887 | ;; Display buffer stored in the quit-restore parameter. | |
2888 | (set-window-dedicated-p window nil) | |
2889 | (set-window-buffer window (nth 0 quit-restore)) | |
2890 | (set-window-start window (nth 1 quit-restore)) | |
2891 | (set-window-point window (nth 2 quit-restore)) | |
2892 | (when (and resize (/= (nth 4 quit-restore) (window-total-size window))) | |
2893 | (resize-window | |
2894 | window (- (nth 4 quit-restore) (window-total-size window)))) | |
2895 | ;; Reset the quit-restore parameter. | |
2896 | (set-window-parameter window 'quit-restore nil) | |
2897 | (when (window-live-p (nth 5 quit-restore)) | |
2898 | (select-window (nth 5 quit-restore)))) | |
2899 | (t | |
2900 | ;; Otherwise, show another buffer in WINDOW and reset the | |
2901 | ;; quit-restore parameter. | |
2902 | (set-window-parameter window 'quit-restore nil) | |
2903 | (unrecord-buffer buffer) | |
2904 | (switch-to-prev-buffer window 'bury-or-kill))) | |
2905 | ||
2906 | ;; Kill WINDOW's old-buffer if requested | |
2907 | (when kill (kill-buffer buffer)) | |
2908 | nil)) | |
562dd5e9 MR |
2909 | \f |
2910 | ;;; Splitting windows. | |
2911 | (defsubst window-split-min-size (&optional horizontal) | |
2912 | "Return minimum height of any window when splitting windows. | |
2913 | Optional argument HORIZONTAL non-nil means return minimum width." | |
2914 | (if horizontal | |
2915 | (max window-min-width window-safe-min-width) | |
2916 | (max window-min-height window-safe-min-height))) | |
2917 | ||
2918 | (defun split-window (&optional window size side) | |
2919 | "Make a new window adjacent to WINDOW. | |
2920 | WINDOW can be any window and defaults to the selected one. | |
2921 | Return the new window which is always a live window. | |
2922 | ||
2923 | Optional argument SIZE a positive number means make WINDOW SIZE | |
2924 | lines or columns tall. If SIZE is negative, make the new window | |
2925 | -SIZE lines or columns tall. If and only if SIZE is non-nil, its | |
2926 | absolute value can be less than `window-min-height' or | |
2927 | `window-min-width'; so this command can make a new window as | |
2928 | small as one line or two columns. SIZE defaults to half of | |
2929 | WINDOW's size. Interactively, SIZE is the prefix argument. | |
2930 | ||
2931 | Optional third argument SIDE nil (or `below') specifies that the | |
2932 | new window shall be located below WINDOW. SIDE `above' means the | |
2933 | new window shall be located above WINDOW. In both cases SIZE | |
2934 | specifies the new number of lines for WINDOW \(or the new window | |
2935 | if SIZE is negative) including space reserved for the mode and/or | |
2936 | header line. | |
2937 | ||
2938 | SIDE t (or `right') specifies that the new window shall be | |
2939 | located on the right side of WINDOW. SIDE `left' means the new | |
2940 | window shall be located on the left of WINDOW. In both cases | |
2941 | SIZE specifies the new number of columns for WINDOW \(or the new | |
2942 | window provided SIZE is negative) including space reserved for | |
2943 | fringes and the scrollbar or a divider column. Any other non-nil | |
2944 | value for SIDE is currently handled like t (or `right'). | |
2945 | ||
2946 | If the variable `ignore-window-parameters' is non-nil or the | |
2947 | `split-window' parameter of WINDOW equals t, do not process any | |
2948 | parameters of WINDOW. Otherwise, if the `split-window' parameter | |
2949 | of WINDOW specifies a function, call that function with all three | |
2950 | arguments and return the value returned by that function. | |
2951 | ||
2952 | Otherwise, if WINDOW is part of an atomic window, \"split\" the | |
2953 | root of that atomic window. The new window does not become a | |
2954 | member of that atomic window. | |
2955 | ||
2956 | If WINDOW is live, properties of the new window like margins and | |
2957 | scrollbars are inherited from WINDOW. If WINDOW is an internal | |
2958 | window, these properties as well as the buffer displayed in the | |
2959 | new window are inherited from the window selected on WINDOW's | |
2960 | frame. The selected window is not changed by this function." | |
2961 | (interactive "i") | |
2962 | (setq window (normalize-any-window window)) | |
2963 | (let* ((horizontal (not (memq side '(nil below above)))) | |
2964 | (frame (window-frame window)) | |
2965 | (parent (window-parent window)) | |
2966 | (function (window-parameter window 'split-window)) | |
2967 | (window-side (window-parameter window 'window-side)) | |
2968 | ;; Rebind `window-nest' since in some cases we may have to | |
2969 | ;; override its value. | |
2970 | (window-nest window-nest) | |
2971 | atom-root) | |
2972 | ||
2973 | (window-check frame) | |
2974 | (catch 'done | |
2975 | (cond | |
2976 | ;; Ignore window parameters if either `ignore-window-parameters' | |
2977 | ;; is t or the `split-window' parameter equals t. | |
2978 | ((or ignore-window-parameters (eq function t))) | |
2979 | ((functionp function) | |
2980 | ;; The `split-window' parameter specifies the function to call. | |
2981 | ;; If that function is `ignore', do nothing. | |
2982 | (throw 'done (funcall function window size side))) | |
2983 | ;; If WINDOW is a subwindow of an atomic window, split the root | |
2984 | ;; window of that atomic window instead. | |
2985 | ((and (window-parameter window 'window-atom) | |
2986 | (setq atom-root (window-atom-root window)) | |
2987 | (not (eq atom-root window))) | |
2988 | (throw 'done (split-window atom-root size side)))) | |
2989 | ||
2990 | (when (and window-side | |
2991 | (or (not parent) | |
2992 | (not (window-parameter parent 'window-side)))) | |
2993 | ;; WINDOW is a side root window. To make sure that a new parent | |
2994 | ;; window gets created set `window-nest' to t. | |
2995 | (setq window-nest t)) | |
2996 | ||
2997 | (when (and window-splits size (> size 0)) | |
2998 | ;; If `window-splits' is non-nil and SIZE is a non-negative | |
2999 | ;; integer, we cannot reasonably resize other windows. Rather | |
3000 | ;; bind `window-nest' to t to make sure that subsequent window | |
3001 | ;; deletions are handled correctly. | |
3002 | (setq window-nest t)) | |
3003 | ||
3004 | (let* ((parent-size | |
3005 | ;; `parent-size' is the size of WINDOW's parent, provided | |
3006 | ;; it has one. | |
3007 | (when parent (window-total-size parent horizontal))) | |
3008 | ;; `resize' non-nil means we are supposed to resize other | |
3009 | ;; windows in WINDOW's combination. | |
3010 | (resize | |
3011 | (and window-splits (not window-nest) | |
3012 | ;; Resize makes sense in iso-combinations only. | |
3013 | (window-iso-combined-p window horizontal))) | |
3014 | ;; `old-size' is the current size of WINDOW. | |
3015 | (old-size (window-total-size window horizontal)) | |
3016 | ;; `new-size' is the specified or calculated size of the | |
3017 | ;; new window. | |
3018 | (new-size | |
3019 | (cond | |
3020 | ((not size) | |
3021 | (max (window-split-min-size horizontal) | |
3022 | (if resize | |
3023 | ;; When resizing try to give the new window the | |
3024 | ;; average size of a window in its combination. | |
3025 | (min (- parent-size | |
3026 | (window-min-size parent horizontal)) | |
3027 | (/ parent-size | |
3028 | (1+ (window-iso-combinations | |
3029 | parent horizontal)))) | |
3030 | ;; Else try to give the new window half the size | |
3031 | ;; of WINDOW (plus an eventual odd line). | |
3032 | (+ (/ old-size 2) (% old-size 2))))) | |
3033 | ((>= size 0) | |
3034 | ;; SIZE non-negative specifies the new size of WINDOW. | |
3035 | ||
3036 | ;; Note: Specifying a non-negative SIZE is practically | |
3037 | ;; always done as workaround for making the new window | |
3038 | ;; appear above or on the left of the new window (the | |
3039 | ;; ispell window is a typical example of that). In all | |
3040 | ;; these cases the SIDE argument should be set to 'above | |
3041 | ;; or 'left in order to support the 'resize option. | |
3042 | ;; Here we have to nest the windows instead, see above. | |
3043 | (- old-size size)) | |
3044 | (t | |
3045 | ;; SIZE negative specifies the size of the new window. | |
3046 | (- size)))) | |
3047 | new-parent new-normal) | |
3048 | ||
3049 | ;; Check SIZE. | |
3050 | (cond | |
3051 | ((not size) | |
3052 | (cond | |
3053 | (resize | |
3054 | ;; SIZE unspecified, resizing. | |
3055 | (when (and (not (window-sizable-p parent (- new-size) horizontal)) | |
3056 | ;; Try again with minimum split size. | |
3057 | (setq new-size | |
3058 | (max new-size (window-split-min-size horizontal))) | |
3059 | (not (window-sizable-p parent (- new-size) horizontal))) | |
3060 | (error "Window %s too small for splitting" parent))) | |
3061 | ((> (+ new-size (window-min-size window horizontal)) old-size) | |
3062 | ;; SIZE unspecified, no resizing. | |
3063 | (error "Window %s too small for splitting" window)))) | |
3064 | ((and (>= size 0) | |
3065 | (or (>= size old-size) | |
3066 | (< new-size (if horizontal | |
3067 | window-safe-min-width | |
3068 | window-safe-min-width)))) | |
3069 | ;; SIZE specified as new size of old window. If the new size | |
3070 | ;; is larger than the old size or the size of the new window | |
3071 | ;; would be less than the safe minimum, signal an error. | |
3072 | (error "Window %s too small for splitting" window)) | |
3073 | (resize | |
3074 | ;; SIZE specified, resizing. | |
3075 | (unless (window-sizable-p parent (- new-size) horizontal) | |
3076 | ;; If we cannot resize the parent give up. | |
3077 | (error "Window %s too small for splitting" parent))) | |
3078 | ((or (< new-size | |
3079 | (if horizontal window-safe-min-width window-safe-min-height)) | |
3080 | (< (- old-size new-size) | |
3081 | (if horizontal window-safe-min-width window-safe-min-height))) | |
3082 | ;; SIZE specification violates minimum size restrictions. | |
3083 | (error "Window %s too small for splitting" window))) | |
3084 | ||
3085 | (resize-window-reset frame horizontal) | |
3086 | ||
3087 | (setq new-parent | |
3088 | ;; Make new-parent non-nil if we need a new parent window; | |
3089 | ;; either because we want to nest or because WINDOW is not | |
3090 | ;; iso-combined. | |
3091 | (or window-nest (not (window-iso-combined-p window horizontal)))) | |
3092 | (setq new-normal | |
3093 | ;; Make new-normal the normal size of the new window. | |
3094 | (cond | |
3095 | (size (/ (float new-size) (if new-parent old-size parent-size))) | |
3096 | (new-parent 0.5) | |
3097 | (resize (/ 1.0 (1+ (window-iso-combinations parent horizontal)))) | |
3098 | (t (/ (window-normal-size window horizontal) 2.0)))) | |
3099 | ||
3100 | (if resize | |
3101 | ;; Try to get space from OLD's siblings. We could go "up" and | |
3102 | ;; try getting additional space from surrounding windows but | |
3103 | ;; we won't be able to return space to those windows when we | |
3104 | ;; delete the one we create here. Hence we do not go up. | |
3105 | (progn | |
3106 | (resize-subwindows parent (- new-size) horizontal) | |
3107 | (let* ((normal (- 1.0 new-normal)) | |
3108 | (sub (window-child parent))) | |
3109 | (while sub | |
3110 | (set-window-new-normal | |
3111 | sub (* (window-normal-size sub horizontal) normal)) | |
3112 | (setq sub (window-right sub))))) | |
3113 | ;; Get entire space from WINDOW. | |
3114 | (set-window-new-total window (- old-size new-size)) | |
3115 | (resize-this-window window (- new-size) horizontal) | |
3116 | (set-window-new-normal | |
3117 | window (- (if new-parent 1.0 (window-normal-size window horizontal)) | |
3118 | new-normal))) | |
3119 | ||
3120 | (let* ((new (split-window-internal window new-size side new-normal))) | |
3121 | ;; Inherit window-side parameters, if any. | |
3122 | (when (and window-side new-parent) | |
3123 | (set-window-parameter (window-parent new) 'window-side window-side) | |
3124 | (set-window-parameter new 'window-side window-side)) | |
3125 | ||
3126 | (run-window-configuration-change-hook frame) | |
3127 | (window-check frame) | |
3128 | ;; Always return the new window. | |
3129 | new))))) | |
3130 | ||
3131 | ;; I think this should be the default; I think people will prefer it--rms. | |
3132 | (defcustom split-window-keep-point t | |
3133 | "If non-nil, \\[split-window-above-each-other] keeps the original point \ | |
3134 | in both children. | |
3135 | This is often more convenient for editing. | |
3136 | If nil, adjust point in each of the two windows to minimize redisplay. | |
3137 | This is convenient on slow terminals, but point can move strangely. | |
3138 | ||
3139 | This option applies only to `split-window-above-each-other' and | |
3140 | functions that call it. `split-window' always keeps the original | |
3141 | point in both children." | |
3142 | :type 'boolean | |
3143 | :group 'windows) | |
3144 | ||
3145 | (defun split-window-above-each-other (&optional size) | |
3146 | "Split selected window into two windows, one above the other. | |
3147 | The upper window gets SIZE lines and the lower one gets the rest. | |
3148 | SIZE negative means the lower window gets -SIZE lines and the | |
3149 | upper one the rest. With no argument, split windows equally or | |
3150 | close to it. Both windows display the same buffer, now current. | |
3151 | ||
3152 | If the variable `split-window-keep-point' is non-nil, both new | |
3153 | windows will get the same value of point as the selected window. | |
3154 | This is often more convenient for editing. The upper window is | |
3155 | the selected window. | |
3156 | ||
3157 | Otherwise, we choose window starts so as to minimize the amount of | |
3158 | redisplay; this is convenient on slow terminals. The new selected | |
3159 | window is the one that the current value of point appears in. The | |
3160 | value of point can change if the text around point is hidden by the | |
3161 | new mode line. | |
3162 | ||
3163 | Regardless of the value of `split-window-keep-point', the upper | |
3164 | window is the original one and the return value is the new, lower | |
3165 | window." | |
3166 | (interactive "P") | |
3167 | (let ((old-window (selected-window)) | |
3168 | (old-point (point)) | |
3169 | (size (and size (prefix-numeric-value size))) | |
3170 | moved-by-window-height moved new-window bottom) | |
3171 | (when (and size (< size 0) (< (- size) window-min-height)) | |
3172 | ;; `split-window' would not signal an error here. | |
3173 | (error "Size of new window too small")) | |
3174 | (setq new-window (split-window nil size)) | |
3175 | (unless split-window-keep-point | |
3176 | (with-current-buffer (window-buffer) | |
3177 | (goto-char (window-start)) | |
3178 | (setq moved (vertical-motion (window-height))) | |
3179 | (set-window-start new-window (point)) | |
3180 | (when (> (point) (window-point new-window)) | |
3181 | (set-window-point new-window (point))) | |
3182 | (when (= moved (window-height)) | |
3183 | (setq moved-by-window-height t) | |
3184 | (vertical-motion -1)) | |
3185 | (setq bottom (point))) | |
3186 | (and moved-by-window-height | |
3187 | (<= bottom (point)) | |
3188 | (set-window-point old-window (1- bottom))) | |
3189 | (and moved-by-window-height | |
3190 | (<= (window-start new-window) old-point) | |
3191 | (set-window-point new-window old-point) | |
3192 | (select-window new-window))) | |
9397e56f MR |
3193 | ;; Always copy quit-restore parameter in interactive use. |
3194 | (let ((quit-restore (window-parameter old-window 'quit-restore))) | |
3195 | (when quit-restore | |
3196 | (set-window-parameter new-window 'quit-restore quit-restore))) | |
3197 | new-window)) | |
562dd5e9 MR |
3198 | |
3199 | (defalias 'split-window-vertically 'split-window-above-each-other) | |
3200 | ||
562dd5e9 MR |
3201 | (defun split-window-side-by-side (&optional size) |
3202 | "Split selected window into two windows side by side. | |
3203 | The selected window becomes the left one and gets SIZE columns. | |
3204 | SIZE negative means the right window gets -SIZE lines. | |
3205 | ||
3206 | SIZE includes the width of the window's scroll bar; if there are | |
3207 | no scroll bars, it includes the width of the divider column to | |
3208 | the window's right, if any. SIZE omitted or nil means split | |
3209 | window equally. | |
3210 | ||
3211 | The selected window remains selected. Return the new window." | |
3212 | (interactive "P") | |
3213 | (let ((old-window (selected-window)) | |
3214 | (size (and size (prefix-numeric-value size))) | |
3215 | new-window) | |
3216 | (when (and size (< size 0) (< (- size) window-min-width)) | |
3217 | ;; `split-window' would not signal an error here. | |
3218 | (error "Size of new window too small")) | |
9397e56f MR |
3219 | (setq new-window (split-window nil size t)) |
3220 | ;; Always copy quit-restore parameter in interactive use. | |
3221 | (let ((quit-restore (window-parameter old-window 'quit-restore))) | |
3222 | (when quit-restore | |
3223 | (set-window-parameter new-window 'quit-restore quit-restore))) | |
3224 | new-window)) | |
562dd5e9 MR |
3225 | |
3226 | (defalias 'split-window-horizontally 'split-window-side-by-side) | |
3227 | \f | |
6198ccd0 MR |
3228 | ;;; Balancing windows. |
3229 | ||
3230 | ;; The following routine uses the recycled code from an old version of | |
3231 | ;; `resize-subwindows'. It's not very pretty, but coding it the way the | |
3232 | ;; new `resize-subwindows' code does would hardly make it any shorter or | |
3233 | ;; more readable (FWIW we'd need three loops - one to calculate the | |
3234 | ;; minimum sizes per window, one to enlarge or shrink windows until the | |
3235 | ;; new parent-size matches, and one where we shrink the largest/enlarge | |
3236 | ;; the smallest window). | |
3237 | (defun balance-windows-2 (window horizontal) | |
3238 | "Subroutine of `balance-windows-1'. | |
3239 | WINDOW must be an iso-combination." | |
3240 | (let* ((first (window-child window)) | |
3241 | (sub first) | |
3242 | (number-of-children 0) | |
3243 | (parent-size (window-new-total window)) | |
3244 | (total-sum parent-size) | |
3245 | found failed size sub-total sub-delta sub-amount rest) | |
3246 | (while sub | |
3247 | (setq number-of-children (1+ number-of-children)) | |
3248 | (when (window-size-fixed-p sub horizontal) | |
3249 | (setq total-sum | |
3250 | (- total-sum (window-total-size sub horizontal))) | |
3251 | (set-window-new-normal sub 'ignore)) | |
3252 | (setq sub (window-right sub))) | |
3c448ab6 | 3253 | |
6198ccd0 MR |
3254 | (setq failed t) |
3255 | (while (and failed (> number-of-children 0)) | |
3256 | (setq size (/ total-sum number-of-children)) | |
3257 | (setq failed nil) | |
3258 | (setq sub first) | |
3259 | (while (and sub (not failed)) | |
3260 | ;; Ignore subwindows that should be ignored or are stuck. | |
3261 | (unless (resize-subwindows-skip-p sub) | |
3262 | (setq found t) | |
3263 | (setq sub-total (window-total-size sub horizontal)) | |
3264 | (setq sub-delta (- size sub-total)) | |
3265 | (setq sub-amount | |
3266 | (window-sizable sub sub-delta horizontal)) | |
3267 | ;; Register the new total size for this subwindow. | |
3268 | (set-window-new-total sub (+ sub-total sub-amount)) | |
3269 | (unless (= sub-amount sub-delta) | |
3270 | (setq total-sum (- total-sum sub-total sub-amount)) | |
3271 | (setq number-of-children (1- number-of-children)) | |
3272 | ;; We failed and need a new round. | |
3273 | (setq failed t) | |
3274 | (set-window-new-normal sub 'skip))) | |
3275 | (setq sub (window-right sub)))) | |
3c448ab6 | 3276 | |
6198ccd0 MR |
3277 | (setq rest (% total-sum number-of-children)) |
3278 | ;; Fix rounding by trying to enlarge non-stuck windows by one line | |
3279 | ;; (column) until `rest' is zero. | |
3280 | (setq sub first) | |
3281 | (while (and sub (> rest 0)) | |
3282 | (unless (resize-subwindows-skip-p window) | |
3283 | (set-window-new-total sub 1 t) | |
3284 | (setq rest (1- rest))) | |
3285 | (setq sub (window-right sub))) | |
3c448ab6 | 3286 | |
6198ccd0 MR |
3287 | ;; Fix rounding by trying to enlarge stuck windows by one line |
3288 | ;; (column) until `rest' equals zero. | |
3289 | (setq sub first) | |
3290 | (while (and sub (> rest 0)) | |
3291 | (unless (eq (window-new-normal sub) 'ignore) | |
3292 | (set-window-new-total sub 1 t) | |
3293 | (setq rest (1- rest))) | |
3294 | (setq sub (window-right sub))) | |
3295 | ||
3296 | (setq sub first) | |
3297 | (while sub | |
3298 | ;; Record new normal sizes. | |
3299 | (set-window-new-normal | |
3300 | sub (/ (if (eq (window-new-normal sub) 'ignore) | |
3301 | (window-total-size sub horizontal) | |
3302 | (window-new-total sub)) | |
3303 | (float parent-size))) | |
3304 | ;; Recursively balance each subwindow's subwindows. | |
3305 | (balance-windows-1 sub horizontal) | |
3306 | (setq sub (window-right sub))))) | |
3307 | ||
3308 | (defun balance-windows-1 (window &optional horizontal) | |
3309 | "Subroutine of `balance-windows'." | |
3310 | (if (window-child window) | |
3311 | (let ((sub (window-child window))) | |
3312 | (if (window-iso-combined-p sub horizontal) | |
3313 | (balance-windows-2 window horizontal) | |
3314 | (let ((size (window-new-total window))) | |
3315 | (while sub | |
3316 | (set-window-new-total sub size) | |
3317 | (balance-windows-1 sub horizontal) | |
3318 | (setq sub (window-right sub)))))))) | |
3319 | ||
3320 | (defun balance-windows (&optional window-or-frame) | |
3321 | "Balance the sizes of subwindows of WINDOW-OR-FRAME. | |
3322 | WINDOW-OR-FRAME is optional and defaults to the selected frame. | |
3323 | If WINDOW-OR-FRAME denotes a frame, balance the sizes of all | |
3324 | subwindows of that frame's root window. If WINDOW-OR-FRAME | |
3325 | denots a window, balance the sizes of all subwindows of that | |
3326 | window." | |
3327 | (interactive) | |
3328 | (let* ((window | |
3329 | (cond | |
3330 | ((or (not window-or-frame) | |
3331 | (frame-live-p window-or-frame)) | |
3332 | (frame-root-window window-or-frame)) | |
3333 | ((or (window-live-p window-or-frame) | |
3334 | (window-child window-or-frame)) | |
3335 | window-or-frame) | |
3336 | (t | |
3337 | (error "Not a window or frame %s" window-or-frame)))) | |
3338 | (frame (window-frame window))) | |
3339 | ;; Balance vertically. | |
3340 | (resize-window-reset (window-frame window)) | |
3341 | (balance-windows-1 window) | |
3342 | (resize-window-apply frame) | |
3343 | ;; Balance horizontally. | |
3344 | (resize-window-reset (window-frame window) t) | |
3345 | (balance-windows-1 window t) | |
3346 | (resize-window-apply frame t))) | |
3c448ab6 MR |
3347 | |
3348 | (defun window-fixed-size-p (&optional window direction) | |
3349 | "Return t if WINDOW cannot be resized in DIRECTION. | |
3350 | WINDOW defaults to the selected window. DIRECTION can be | |
3351 | nil (i.e. any), `height' or `width'." | |
3352 | (with-current-buffer (window-buffer window) | |
3353 | (when (and (boundp 'window-size-fixed) window-size-fixed) | |
3354 | (not (and direction | |
3355 | (member (cons direction window-size-fixed) | |
3356 | '((height . width) (width . height)))))))) | |
3357 | ||
3358 | ;;; A different solution to balance-windows. | |
3c448ab6 MR |
3359 | (defvar window-area-factor 1 |
3360 | "Factor by which the window area should be over-estimated. | |
3361 | This is used by `balance-windows-area'. | |
3362 | Changing this globally has no effect.") | |
3363 | (make-variable-buffer-local 'window-area-factor) | |
3364 | ||
6198ccd0 MR |
3365 | (defun balance-windows-area-adjust (window delta horizontal) |
3366 | "Wrapper around `resize-window' with error checking. | |
3367 | Arguments WINDOW, DELTA and HORIZONTAL are passed on to that function." | |
3368 | ;; `resize-window' may fail if delta is too large. | |
3369 | (while (>= (abs delta) 1) | |
3370 | (condition-case nil | |
3371 | (progn | |
3372 | (resize-window window delta horizontal) | |
3373 | (setq delta 0)) | |
3374 | (error | |
3375 | ;;(message "adjust: %s" (error-message-string err)) | |
3376 | (setq delta (/ delta 2)))))) | |
3377 | ||
3c448ab6 MR |
3378 | (defun balance-windows-area () |
3379 | "Make all visible windows the same area (approximately). | |
3380 | See also `window-area-factor' to change the relative size of | |
3381 | specific buffers." | |
3382 | (interactive) | |
3383 | (let* ((unchanged 0) (carry 0) (round 0) | |
3384 | ;; Remove fixed-size windows. | |
3385 | (wins (delq nil (mapcar (lambda (win) | |
3386 | (if (not (window-fixed-size-p win)) win)) | |
3387 | (window-list nil 'nomini)))) | |
3388 | (changelog nil) | |
3389 | next) | |
3390 | ;; Resizing a window changes the size of surrounding windows in complex | |
3391 | ;; ways, so it's difficult to balance them all. The introduction of | |
3392 | ;; `adjust-window-trailing-edge' made it a bit easier, but it is still | |
3393 | ;; very difficult to do. `balance-window' above takes an off-line | |
3394 | ;; approach: get the whole window tree, then balance it, then try to | |
3395 | ;; adjust the windows so they fit the result. | |
3396 | ;; Here, instead, we take a "local optimization" approach, where we just | |
3397 | ;; go through all the windows several times until nothing needs to be | |
3398 | ;; changed. The main problem with this approach is that it's difficult | |
3399 | ;; to make sure it terminates, so we use some heuristic to try and break | |
3400 | ;; off infinite loops. | |
3401 | ;; After a round without any change, we allow a second, to give a chance | |
3402 | ;; to the carry to propagate a minor imbalance from the end back to | |
3403 | ;; the beginning. | |
3404 | (while (< unchanged 2) | |
3405 | ;; (message "New round") | |
3406 | (setq unchanged (1+ unchanged) round (1+ round)) | |
3407 | (dolist (win wins) | |
3408 | (setq next win) | |
3409 | (while (progn (setq next (next-window next)) | |
3410 | (window-fixed-size-p next))) | |
3411 | ;; (assert (eq next (or (cadr (member win wins)) (car wins)))) | |
3412 | (let* ((horiz | |
3413 | (< (car (window-edges win)) (car (window-edges next)))) | |
3414 | (areadiff (/ (- (* (window-height next) (window-width next) | |
3415 | (buffer-local-value 'window-area-factor | |
3416 | (window-buffer next))) | |
3417 | (* (window-height win) (window-width win) | |
3418 | (buffer-local-value 'window-area-factor | |
3419 | (window-buffer win)))) | |
3420 | (max (buffer-local-value 'window-area-factor | |
3421 | (window-buffer win)) | |
3422 | (buffer-local-value 'window-area-factor | |
3423 | (window-buffer next))))) | |
3424 | (edgesize (if horiz | |
3425 | (+ (window-height win) (window-height next)) | |
3426 | (+ (window-width win) (window-width next)))) | |
3427 | (diff (/ areadiff edgesize))) | |
3428 | (when (zerop diff) | |
3429 | ;; Maybe diff is actually closer to 1 than to 0. | |
3430 | (setq diff (/ (* 3 areadiff) (* 2 edgesize)))) | |
3431 | (when (and (zerop diff) (not (zerop areadiff))) | |
3432 | (setq diff (/ (+ areadiff carry) edgesize)) | |
3433 | ;; Change things smoothly. | |
3434 | (if (or (> diff 1) (< diff -1)) (setq diff (/ diff 2)))) | |
3435 | (if (zerop diff) | |
3436 | ;; Make sure negligible differences don't accumulate to | |
3437 | ;; become significant. | |
3438 | (setq carry (+ carry areadiff)) | |
6198ccd0 MR |
3439 | ;; This used `adjust-window-trailing-edge' before and uses |
3440 | ;; `resize-window' now. Error wrapping is still needed. | |
3441 | (balance-windows-area-adjust win diff horiz) | |
3c448ab6 MR |
3442 | ;; (sit-for 0.5) |
3443 | (let ((change (cons win (window-edges win)))) | |
3444 | ;; If the same change has been seen already for this window, | |
3445 | ;; we're most likely in an endless loop, so don't count it as | |
3446 | ;; a change. | |
3447 | (unless (member change changelog) | |
3448 | (push change changelog) | |
3449 | (setq unchanged 0 carry 0))))))) | |
3450 | ;; We've now basically balanced all the windows. | |
3451 | ;; But there may be some minor off-by-one imbalance left over, | |
3452 | ;; so let's do some fine tuning. | |
3453 | ;; (bw-finetune wins) | |
3454 | ;; (message "Done in %d rounds" round) | |
3455 | )) | |
3456 | ||
3457 | \f | |
3458 | (defcustom display-buffer-function nil | |
3459 | "If non-nil, function to call to handle `display-buffer'. | |
3460 | It will receive two args, the buffer and a flag which if non-nil | |
3461 | means that the currently selected window is not acceptable. It | |
3462 | should choose or create a window, display the specified buffer in | |
3463 | it, and return the window. | |
3464 | ||
3465 | Commands such as `switch-to-buffer-other-window' and | |
3466 | `find-file-other-window' work using this function." | |
3467 | :type '(choice | |
3468 | (const nil) | |
3469 | (function :tag "function")) | |
3470 | :group 'windows) | |
3471 | ||
56f31926 MR |
3472 | (defcustom special-display-buffer-names nil |
3473 | "List of names of buffers that should be displayed specially. | |
3474 | Displaying a buffer with `display-buffer' or `pop-to-buffer', if | |
3475 | its name is in this list, displays the buffer in a way specified | |
3476 | by `special-display-function'. `special-display-popup-frame' | |
3477 | \(the default for `special-display-function') usually displays | |
3478 | the buffer in a separate frame made with the parameters specified | |
3479 | by `special-display-frame-alist'. If `special-display-function' | |
3480 | has been set to some other function, that function is called with | |
3481 | the buffer as first, and nil as second argument. | |
3482 | ||
3483 | Alternatively, an element of this list can be specified as | |
3484 | \(BUFFER-NAME FRAME-PARAMETERS), where BUFFER-NAME is a buffer | |
3485 | name and FRAME-PARAMETERS an alist of \(PARAMETER . VALUE) pairs. | |
3486 | `special-display-popup-frame' will interpret such pairs as frame | |
3487 | parameters when it creates a special frame, overriding the | |
3488 | corresponding values from `special-display-frame-alist'. | |
3489 | ||
3490 | As a special case, if FRAME-PARAMETERS contains (same-window . t) | |
3491 | `special-display-popup-frame' displays that buffer in the | |
3492 | selected window. If FRAME-PARAMETERS contains (same-frame . t), | |
3493 | it displays that buffer in a window on the selected frame. | |
3494 | ||
3495 | If `special-display-function' specifies some other function than | |
3496 | `special-display-popup-frame', that function is called with the | |
3497 | buffer named BUFFER-NAME as first, and FRAME-PARAMETERS as second | |
3498 | argument. | |
3499 | ||
3500 | Finally, an element of this list can be also specified as | |
3501 | \(BUFFER-NAME FUNCTION OTHER-ARGS). In that case, | |
3502 | `special-display-popup-frame' will call FUNCTION with the buffer | |
3503 | named BUFFER-NAME as first argument, and OTHER-ARGS as the | |
3504 | second. If `special-display-function' specifies some other | |
3505 | function, that function is called with the buffer named | |
3506 | BUFFER-NAME as first, and the element's cdr as second argument. | |
3507 | ||
3508 | If this variable appears \"not to work\", because you added a | |
3509 | name to it but the corresponding buffer is displayed in the | |
3510 | selected window, look at the values of `same-window-buffer-names' | |
3511 | and `same-window-regexps'. Those variables take precedence over | |
3512 | this one. | |
3513 | ||
3514 | See also `special-display-regexps'." | |
3515 | :type '(repeat | |
3516 | (choice :tag "Buffer" | |
3517 | :value "" | |
3518 | (string :format "%v") | |
3519 | (cons :tag "With parameters" | |
3520 | :format "%v" | |
3521 | :value ("" . nil) | |
3522 | (string :format "%v") | |
3523 | (repeat :tag "Parameters" | |
3524 | (cons :format "%v" | |
3525 | (symbol :tag "Parameter") | |
3526 | (sexp :tag "Value")))) | |
3527 | (list :tag "With function" | |
3528 | :format "%v" | |
3529 | :value ("" . nil) | |
3530 | (string :format "%v") | |
3531 | (function :tag "Function") | |
3532 | (repeat :tag "Arguments" (sexp))))) | |
3533 | :group 'windows | |
3534 | :group 'frames) | |
3535 | ||
ac549fa5 GM |
3536 | ;;;###autoload |
3537 | (put 'special-display-buffer-names 'risky-local-variable t) | |
3538 | ||
56f31926 MR |
3539 | (defcustom special-display-regexps nil |
3540 | "List of regexps saying which buffers should be displayed specially. | |
3541 | Displaying a buffer with `display-buffer' or `pop-to-buffer', if | |
3542 | any regexp in this list matches its name, displays it specially | |
3543 | using `special-display-function'. `special-display-popup-frame' | |
3544 | \(the default for `special-display-function') usually displays | |
3545 | the buffer in a separate frame made with the parameters specified | |
3546 | by `special-display-frame-alist'. If `special-display-function' | |
3547 | has been set to some other function, that function is called with | |
3548 | the buffer as first, and nil as second argument. | |
3549 | ||
3550 | Alternatively, an element of this list can be specified as | |
3551 | \(REGEXP FRAME-PARAMETERS), where REGEXP is a regexp as above and | |
3552 | FRAME-PARAMETERS an alist of (PARAMETER . VALUE) pairs. | |
3553 | `special-display-popup-frame' will then interpret these pairs as | |
3554 | frame parameters when creating a special frame for a buffer whose | |
3555 | name matches REGEXP, overriding the corresponding values from | |
3556 | `special-display-frame-alist'. | |
3557 | ||
3558 | As a special case, if FRAME-PARAMETERS contains (same-window . t) | |
3559 | `special-display-popup-frame' displays buffers matching REGEXP in | |
3560 | the selected window. \(same-frame . t) in FRAME-PARAMETERS means | |
3561 | to display such buffers in a window on the selected frame. | |
3562 | ||
3563 | If `special-display-function' specifies some other function than | |
3564 | `special-display-popup-frame', that function is called with the | |
3565 | buffer whose name matched REGEXP as first, and FRAME-PARAMETERS | |
3566 | as second argument. | |
3567 | ||
3568 | Finally, an element of this list can be also specified as | |
3569 | \(REGEXP FUNCTION OTHER-ARGS). `special-display-popup-frame' | |
3570 | will then call FUNCTION with the buffer whose name matched | |
3571 | REGEXP as first, and OTHER-ARGS as second argument. If | |
3572 | `special-display-function' specifies some other function, that | |
3573 | function is called with the buffer whose name matched REGEXP | |
3574 | as first, and the element's cdr as second argument. | |
3575 | ||
3576 | If this variable appears \"not to work\", because you added a | |
3577 | name to it but the corresponding buffer is displayed in the | |
3578 | selected window, look at the values of `same-window-buffer-names' | |
3579 | and `same-window-regexps'. Those variables take precedence over | |
3580 | this one. | |
3581 | ||
3582 | See also `special-display-buffer-names'." | |
3583 | :type '(repeat | |
3584 | (choice :tag "Buffer" | |
3585 | :value "" | |
3586 | (regexp :format "%v") | |
3587 | (cons :tag "With parameters" | |
3588 | :format "%v" | |
3589 | :value ("" . nil) | |
3590 | (regexp :format "%v") | |
3591 | (repeat :tag "Parameters" | |
3592 | (cons :format "%v" | |
3593 | (symbol :tag "Parameter") | |
3594 | (sexp :tag "Value")))) | |
3595 | (list :tag "With function" | |
3596 | :format "%v" | |
3597 | :value ("" . nil) | |
3598 | (regexp :format "%v") | |
3599 | (function :tag "Function") | |
3600 | (repeat :tag "Arguments" (sexp))))) | |
3601 | :group 'windows | |
3602 | :group 'frames) | |
3603 | ||
3c448ab6 MR |
3604 | (defun special-display-p (buffer-name) |
3605 | "Return non-nil if a buffer named BUFFER-NAME gets a special frame. | |
56f31926 MR |
3606 | More precisely, return t if `special-display-buffer-names' or |
3607 | `special-display-regexps' contain a string entry equaling or | |
3608 | matching BUFFER-NAME. If `special-display-buffer-names' or | |
3609 | `special-display-regexps' contain a list entry whose car equals | |
3610 | or matches BUFFER-NAME, the return value is the cdr of that | |
3611 | entry." | |
98722073 MR |
3612 | (let (tmp) |
3613 | (cond | |
3614 | ((not (stringp buffer-name))) | |
3615 | ((member buffer-name special-display-buffer-names) | |
3616 | t) | |
3617 | ((setq tmp (assoc buffer-name special-display-buffer-names)) | |
3618 | (cdr tmp)) | |
3619 | ((catch 'found | |
3620 | (dolist (regexp special-display-regexps) | |
3621 | (cond | |
3622 | ((stringp regexp) | |
3623 | (when (string-match-p regexp buffer-name) | |
3624 | (throw 'found t))) | |
3625 | ((and (consp regexp) (stringp (car regexp)) | |
3626 | (string-match-p (car regexp) buffer-name)) | |
3627 | (throw 'found (cdr regexp)))))))))) | |
3c448ab6 MR |
3628 | |
3629 | (defcustom special-display-function 'special-display-popup-frame | |
56f31926 MR |
3630 | "Function to call for displaying special buffers. |
3631 | This function is called with two arguments - the buffer and, | |
3632 | optionally, a list - and should return a window displaying that | |
3633 | buffer. The default value usually makes a separate frame for the | |
3634 | buffer using `special-display-frame-alist' to specify the frame | |
3635 | parameters. See the definition of `special-display-popup-frame' | |
3636 | for how to specify such a function. | |
3637 | ||
3638 | A buffer is special when its name is either listed in | |
3c448ab6 MR |
3639 | `special-display-buffer-names' or matches a regexp in |
3640 | `special-display-regexps'." | |
3641 | :type 'function | |
3642 | :group 'frames) | |
3643 | ||
3c448ab6 MR |
3644 | (defcustom same-window-buffer-names nil |
3645 | "List of names of buffers that should appear in the \"same\" window. | |
3646 | `display-buffer' and `pop-to-buffer' show a buffer whose name is | |
3647 | on this list in the selected rather than some other window. | |
3648 | ||
3649 | An element of this list can be a cons cell instead of just a | |
56f31926 MR |
3650 | string. In that case, the cell's car must be a string specifying |
3651 | the buffer name. This is for compatibility with | |
3c448ab6 MR |
3652 | `special-display-buffer-names'; the cdr of the cons cell is |
3653 | ignored. | |
3654 | ||
3655 | See also `same-window-regexps'." | |
3656 | :type '(repeat (string :format "%v")) | |
3657 | :group 'windows) | |
3658 | ||
3659 | (defcustom same-window-regexps nil | |
3660 | "List of regexps saying which buffers should appear in the \"same\" window. | |
3661 | `display-buffer' and `pop-to-buffer' show a buffer whose name | |
3662 | matches a regexp on this list in the selected rather than some | |
3663 | other window. | |
3664 | ||
3665 | An element of this list can be a cons cell instead of just a | |
56f31926 | 3666 | string. In that case, the cell's car must be a regexp matching |
3c448ab6 | 3667 | the buffer name. This is for compatibility with |
56f31926 | 3668 | `special-display-regexps'; the cdr of the cons cell is ignored. |
3c448ab6 MR |
3669 | |
3670 | See also `same-window-buffer-names'." | |
3671 | :type '(repeat (regexp :format "%v")) | |
3672 | :group 'windows) | |
3673 | ||
56f31926 MR |
3674 | (defun same-window-p (buffer-name) |
3675 | "Return non-nil if a buffer named BUFFER-NAME would be shown in the \"same\" window. | |
3676 | This function returns non-nil if `display-buffer' or | |
3677 | `pop-to-buffer' would show a buffer named BUFFER-NAME in the | |
3678 | selected rather than \(as usual\) some other window. See | |
3679 | `same-window-buffer-names' and `same-window-regexps'." | |
3680 | (cond | |
3681 | ((not (stringp buffer-name))) | |
3682 | ;; The elements of `same-window-buffer-names' can be buffer | |
3683 | ;; names or cons cells whose cars are buffer names. | |
3684 | ((member buffer-name same-window-buffer-names)) | |
3685 | ((assoc buffer-name same-window-buffer-names)) | |
3686 | ((catch 'found | |
3687 | (dolist (regexp same-window-regexps) | |
3688 | ;; The elements of `same-window-regexps' can be regexps | |
3689 | ;; or cons cells whose cars are regexps. | |
3690 | (when (or (and (stringp regexp) | |
3691 | (string-match regexp buffer-name)) | |
3692 | (and (consp regexp) (stringp (car regexp)) | |
3693 | (string-match-p (car regexp) buffer-name))) | |
3694 | (throw 'found t))))))) | |
3695 | ||
3c448ab6 MR |
3696 | (defcustom pop-up-frames nil |
3697 | "Whether `display-buffer' should make a separate frame. | |
d1f18ec0 | 3698 | If nil, never make a separate frame. |
3c448ab6 MR |
3699 | If the value is `graphic-only', make a separate frame |
3700 | on graphic displays only. | |
3701 | Any other non-nil value means always make a separate frame." | |
3702 | :type '(choice | |
3703 | (const :tag "Never" nil) | |
3704 | (const :tag "On graphic displays only" graphic-only) | |
3705 | (const :tag "Always" t)) | |
3706 | :group 'windows) | |
3707 | ||
3708 | (defcustom display-buffer-reuse-frames nil | |
3709 | "Non-nil means `display-buffer' should reuse frames. | |
3710 | If the buffer in question is already displayed in a frame, raise | |
3711 | that frame." | |
3712 | :type 'boolean | |
3713 | :version "21.1" | |
3714 | :group 'windows) | |
3715 | ||
3716 | (defcustom pop-up-windows t | |
3717 | "Non-nil means `display-buffer' should make a new window." | |
3718 | :type 'boolean | |
3719 | :group 'windows) | |
3720 | ||
8b10a2d1 MR |
3721 | (defcustom split-window-preferred-function 'split-window-sensibly |
3722 | "Function called by `display-buffer' routines to split a window. | |
3723 | This function is called with a window as single argument and is | |
3724 | supposed to split that window and return the new window. If the | |
3725 | window can (or shall) not be split, it is supposed to return nil. | |
3726 | The default is to call the function `split-window-sensibly' which | |
3727 | tries to split the window in a way which seems most suitable. | |
3728 | You can customize the options `split-height-threshold' and/or | |
3729 | `split-width-threshold' in order to have `split-window-sensibly' | |
3730 | prefer either vertical or horizontal splitting. | |
3731 | ||
3732 | If you set this to any other function, bear in mind that the | |
3733 | `display-buffer' routines may call this function two times. The | |
3734 | argument of the first call is the largest window on its frame. | |
3735 | If that call fails to return a live window, the function is | |
3736 | called again with the least recently used window as argument. If | |
3737 | that call fails too, `display-buffer' will use an existing window | |
3738 | to display its buffer. | |
3739 | ||
3740 | The window selected at the time `display-buffer' was invoked is | |
3741 | still selected when this function is called. Hence you can | |
3742 | compare the window argument with the value of `selected-window' | |
3743 | if you intend to split the selected window instead or if you do | |
3744 | not want to split the selected window." | |
3745 | :type 'function | |
3c448ab6 MR |
3746 | :version "23.1" |
3747 | :group 'windows) | |
3748 | ||
8b10a2d1 MR |
3749 | (defcustom split-height-threshold 80 |
3750 | "Minimum height for splitting windows sensibly. | |
3751 | If this is an integer, `split-window-sensibly' may split a window | |
3752 | vertically only if it has at least this many lines. If this is | |
3753 | nil, `split-window-sensibly' is not allowed to split a window | |
3754 | vertically. If, however, a window is the only window on its | |
3755 | frame, `split-window-sensibly' may split it vertically | |
3756 | disregarding the value of this variable." | |
3757 | :type '(choice (const nil) (integer :tag "lines")) | |
3c448ab6 MR |
3758 | :version "23.1" |
3759 | :group 'windows) | |
3760 | ||
8b10a2d1 MR |
3761 | (defcustom split-width-threshold 160 |
3762 | "Minimum width for splitting windows sensibly. | |
3763 | If this is an integer, `split-window-sensibly' may split a window | |
3764 | horizontally only if it has at least this many columns. If this | |
3765 | is nil, `split-window-sensibly' is not allowed to split a window | |
3766 | horizontally." | |
3767 | :type '(choice (const nil) (integer :tag "columns")) | |
3c448ab6 MR |
3768 | :version "23.1" |
3769 | :group 'windows) | |
3770 | ||
8b10a2d1 MR |
3771 | (defun window-splittable-p (window &optional horizontal) |
3772 | "Return non-nil if `split-window-sensibly' may split WINDOW. | |
3773 | Optional argument HORIZONTAL nil or omitted means check whether | |
3774 | `split-window-sensibly' may split WINDOW vertically. HORIZONTAL | |
3775 | non-nil means check whether WINDOW may be split horizontally. | |
3c448ab6 | 3776 | |
8b10a2d1 | 3777 | WINDOW may be split vertically when the following conditions |
3c448ab6 | 3778 | hold: |
3c448ab6 MR |
3779 | - `window-size-fixed' is either nil or equals `width' for the |
3780 | buffer of WINDOW. | |
8b10a2d1 | 3781 | - `split-height-threshold' is an integer and WINDOW is at least as |
3c448ab6 | 3782 | high as `split-height-threshold'. |
3c448ab6 MR |
3783 | - When WINDOW is split evenly, the emanating windows are at least |
3784 | `window-min-height' lines tall and can accommodate at least one | |
3785 | line plus - if WINDOW has one - a mode line. | |
3786 | ||
8b10a2d1 | 3787 | WINDOW may be split horizontally when the following conditions |
3c448ab6 | 3788 | hold: |
3c448ab6 MR |
3789 | - `window-size-fixed' is either nil or equals `height' for the |
3790 | buffer of WINDOW. | |
8b10a2d1 | 3791 | - `split-width-threshold' is an integer and WINDOW is at least as |
3c448ab6 | 3792 | wide as `split-width-threshold'. |
3c448ab6 MR |
3793 | - When WINDOW is split evenly, the emanating windows are at least |
3794 | `window-min-width' or two (whichever is larger) columns wide." | |
3795 | (when (window-live-p window) | |
3796 | (with-current-buffer (window-buffer window) | |
3797 | (if horizontal | |
3798 | ;; A window can be split horizontally when its width is not | |
3799 | ;; fixed, it is at least `split-width-threshold' columns wide | |
3800 | ;; and at least twice as wide as `window-min-width' and 2 (the | |
3801 | ;; latter value is hardcoded). | |
3802 | (and (memq window-size-fixed '(nil height)) | |
3803 | ;; Testing `window-full-width-p' here hardly makes any | |
3804 | ;; sense nowadays. This can be done more intuitively by | |
3805 | ;; setting up `split-width-threshold' appropriately. | |
3806 | (numberp split-width-threshold) | |
3807 | (>= (window-width window) | |
3808 | (max split-width-threshold | |
3809 | (* 2 (max window-min-width 2))))) | |
3810 | ;; A window can be split vertically when its height is not | |
3811 | ;; fixed, it is at least `split-height-threshold' lines high, | |
3812 | ;; and it is at least twice as high as `window-min-height' and 2 | |
3813 | ;; if it has a modeline or 1. | |
3814 | (and (memq window-size-fixed '(nil width)) | |
3815 | (numberp split-height-threshold) | |
3816 | (>= (window-height window) | |
3817 | (max split-height-threshold | |
3818 | (* 2 (max window-min-height | |
3819 | (if mode-line-format 2 1)))))))))) | |
3820 | ||
8b10a2d1 MR |
3821 | (defun split-window-sensibly (window) |
3822 | "Split WINDOW in a way suitable for `display-buffer'. | |
3823 | If `split-height-threshold' specifies an integer, WINDOW is at | |
3824 | least `split-height-threshold' lines tall and can be split | |
3825 | vertically, split WINDOW into two windows one above the other and | |
3826 | return the lower window. Otherwise, if `split-width-threshold' | |
3827 | specifies an integer, WINDOW is at least `split-width-threshold' | |
3828 | columns wide and can be split horizontally, split WINDOW into two | |
3829 | windows side by side and return the window on the right. If this | |
3830 | can't be done either and WINDOW is the only window on its frame, | |
3831 | try to split WINDOW vertically disregarding any value specified | |
3832 | by `split-height-threshold'. If that succeeds, return the lower | |
3833 | window. Return nil otherwise. | |
3834 | ||
3835 | By default `display-buffer' routines call this function to split | |
3836 | the largest or least recently used window. To change the default | |
3837 | customize the option `split-window-preferred-function'. | |
3838 | ||
3839 | You can enforce this function to not split WINDOW horizontally, | |
3840 | by setting \(or binding) the variable `split-width-threshold' to | |
3841 | nil. If, in addition, you set `split-height-threshold' to zero, | |
3842 | chances increase that this function does split WINDOW vertically. | |
3843 | ||
3844 | In order to not split WINDOW vertically, set \(or bind) the | |
3845 | variable `split-height-threshold' to nil. Additionally, you can | |
3846 | set `split-width-threshold' to zero to make a horizontal split | |
3847 | more likely to occur. | |
3848 | ||
3849 | Have a look at the function `window-splittable-p' if you want to | |
3850 | know how `split-window-sensibly' determines whether WINDOW can be | |
3851 | split." | |
3852 | (or (and (window-splittable-p window) | |
3853 | ;; Split window vertically. | |
3854 | (with-selected-window window | |
3855 | (split-window-vertically))) | |
3856 | (and (window-splittable-p window t) | |
3857 | ;; Split window horizontally. | |
3858 | (with-selected-window window | |
3859 | (split-window-horizontally))) | |
3860 | (and (eq window (frame-root-window (window-frame window))) | |
3861 | (not (window-minibuffer-p window)) | |
3862 | ;; If WINDOW is the only window on its frame and is not the | |
3863 | ;; minibuffer window, try to split it vertically disregarding | |
3864 | ;; the value of `split-height-threshold'. | |
3865 | (let ((split-height-threshold 0)) | |
3866 | (when (window-splittable-p window) | |
3867 | (with-selected-window window | |
3868 | (split-window-vertically))))))) | |
3869 | ||
3c448ab6 | 3870 | (defun window--try-to-split-window (window) |
8b10a2d1 MR |
3871 | "Try to split WINDOW. |
3872 | Return value returned by `split-window-preferred-function' if it | |
3873 | represents a live window, nil otherwise." | |
3874 | (and (window-live-p window) | |
3875 | (not (frame-parameter (window-frame window) 'unsplittable)) | |
3876 | (let ((new-window | |
3877 | ;; Since `split-window-preferred-function' might | |
3878 | ;; throw an error use `condition-case'. | |
3879 | (condition-case nil | |
3880 | (funcall split-window-preferred-function window) | |
3881 | (error nil)))) | |
3882 | (and (window-live-p new-window) new-window)))) | |
3c448ab6 MR |
3883 | |
3884 | (defun window--frame-usable-p (frame) | |
3885 | "Return FRAME if it can be used to display a buffer." | |
3886 | (when (frame-live-p frame) | |
3887 | (let ((window (frame-root-window frame))) | |
3888 | ;; `frame-root-window' may be an internal window which is considered | |
3889 | ;; "dead" by `window-live-p'. Hence if `window' is not live we | |
3890 | ;; implicitly know that `frame' has a visible window we can use. | |
4afba819 SM |
3891 | (unless (and (window-live-p window) |
3892 | (or (window-minibuffer-p window) | |
3893 | ;; If the window is soft-dedicated, the frame is usable. | |
064e57de SM |
3894 | ;; Actually, even if the window is really dedicated, |
3895 | ;; the frame is still usable by splitting it. | |
3896 | ;; At least Emacs-22 allowed it, and it is desirable | |
3897 | ;; when displaying same-frame windows. | |
3898 | nil ; (eq t (window-dedicated-p window)) | |
3899 | )) | |
3c448ab6 MR |
3900 | frame)))) |
3901 | ||
3902 | (defcustom even-window-heights t | |
3903 | "If non-nil `display-buffer' will try to even window heights. | |
3904 | Otherwise `display-buffer' will leave the window configuration | |
3905 | alone. Heights are evened only when `display-buffer' chooses a | |
3906 | window that appears above or below the selected window." | |
3907 | :type 'boolean | |
3908 | :group 'windows) | |
3909 | ||
3910 | (defun window--even-window-heights (window) | |
3911 | "Even heights of WINDOW and selected window. | |
3912 | Do this only if these windows are vertically adjacent to each | |
3913 | other, `even-window-heights' is non-nil, and the selected window | |
3914 | is higher than WINDOW." | |
3915 | (when (and even-window-heights | |
3916 | (not (eq window (selected-window))) | |
3917 | ;; Don't resize minibuffer windows. | |
3918 | (not (window-minibuffer-p (selected-window))) | |
d1f18ec0 | 3919 | (> (window-height (selected-window)) (window-height window)) |
3c448ab6 MR |
3920 | (eq (window-frame window) (window-frame (selected-window))) |
3921 | (let ((sel-edges (window-edges (selected-window))) | |
3922 | (win-edges (window-edges window))) | |
3923 | (and (= (nth 0 sel-edges) (nth 0 win-edges)) | |
3924 | (= (nth 2 sel-edges) (nth 2 win-edges)) | |
3925 | (or (= (nth 1 sel-edges) (nth 3 win-edges)) | |
3926 | (= (nth 3 sel-edges) (nth 1 win-edges)))))) | |
3927 | (let ((window-min-height 1)) | |
3928 | ;; Don't throw an error if we can't even window heights for | |
3929 | ;; whatever reason. | |
3930 | (condition-case nil | |
3931 | (enlarge-window (/ (- (window-height window) (window-height)) 2)) | |
3932 | (error nil))))) | |
3933 | ||
3934 | (defun window--display-buffer-1 (window) | |
3935 | "Raise the frame containing WINDOW. | |
3936 | Do not raise the selected frame. Return WINDOW." | |
3937 | (let* ((frame (window-frame window)) | |
3938 | (visible (frame-visible-p frame))) | |
3939 | (unless (or (not visible) | |
3940 | ;; Assume the selected frame is already visible enough. | |
3941 | (eq frame (selected-frame)) | |
3942 | ;; Assume the frame from which we invoked the minibuffer | |
3943 | ;; is visible. | |
3944 | (and (minibuffer-window-active-p (selected-window)) | |
3945 | (eq frame (window-frame (minibuffer-selected-window))))) | |
3946 | (raise-frame frame)) | |
3947 | window)) | |
3948 | ||
04ae543a | 3949 | (defun window--display-buffer-2 (buffer window &optional dedicated) |
3c448ab6 | 3950 | "Display BUFFER in WINDOW and make its frame visible. |
04ae543a | 3951 | Set `window-dedicated-p' to DEDICATED if non-nil. |
3c448ab6 MR |
3952 | Return WINDOW." |
3953 | (when (and (buffer-live-p buffer) (window-live-p window)) | |
3954 | (set-window-buffer window buffer) | |
04ae543a | 3955 | (when dedicated |
782d6e30 | 3956 | (set-window-dedicated-p window dedicated)) |
3c448ab6 MR |
3957 | (window--display-buffer-1 window))) |
3958 | ||
d2c9fc42 SM |
3959 | (defvar display-buffer-mark-dedicated nil |
3960 | "If non-nil, `display-buffer' marks the windows it creates as dedicated. | |
3961 | The actual non-nil value of this variable will be copied to the | |
3962 | `window-dedicated-p' flag.") | |
3963 | ||
3c448ab6 MR |
3964 | (defun display-buffer (buffer-or-name &optional not-this-window frame) |
3965 | "Make buffer BUFFER-OR-NAME appear in some window but don't select it. | |
3966 | BUFFER-OR-NAME must be a buffer or the name of an existing | |
3967 | buffer. Return the window chosen to display BUFFER-OR-NAME or | |
3968 | nil if no such window is found. | |
3969 | ||
3970 | Optional argument NOT-THIS-WINDOW non-nil means display the | |
3971 | buffer in a window other than the selected one, even if it is | |
3972 | already displayed in the selected window. | |
3973 | ||
3974 | Optional argument FRAME specifies which frames to investigate | |
3975 | when the specified buffer is already displayed. If the buffer is | |
3976 | already displayed in some window on one of these frames simply | |
3977 | return that window. Possible values of FRAME are: | |
3978 | ||
aa248733 MS |
3979 | `visible' - consider windows on all visible frames on the current |
3980 | terminal. | |
3c448ab6 | 3981 | |
aa248733 MS |
3982 | 0 - consider windows on all visible or iconified frames on the |
3983 | current terminal. | |
3c448ab6 MR |
3984 | |
3985 | t - consider windows on all frames. | |
3986 | ||
3987 | A specific frame - consider windows on that frame only. | |
3988 | ||
3989 | nil - consider windows on the selected frame \(actually the | |
3990 | last non-minibuffer frame\) only. If, however, either | |
3991 | `display-buffer-reuse-frames' or `pop-up-frames' is non-nil | |
3992 | \(non-nil and not graphic-only on a text-only terminal), | |
aa248733 | 3993 | consider all visible or iconified frames on the current terminal." |
3c448ab6 MR |
3994 | (interactive "BDisplay buffer:\nP") |
3995 | (let* ((can-use-selected-window | |
3996 | ;; The selected window is usable unless either NOT-THIS-WINDOW | |
3997 | ;; is non-nil, it is dedicated to its buffer, or it is the | |
3998 | ;; `minibuffer-window'. | |
3999 | (not (or not-this-window | |
4000 | (window-dedicated-p (selected-window)) | |
4001 | (window-minibuffer-p)))) | |
4002 | (buffer (if (bufferp buffer-or-name) | |
4003 | buffer-or-name | |
4004 | (get-buffer buffer-or-name))) | |
4005 | (name-of-buffer (buffer-name buffer)) | |
4006 | ;; On text-only terminals do not pop up a new frame when | |
4007 | ;; `pop-up-frames' equals graphic-only. | |
4008 | (use-pop-up-frames (if (eq pop-up-frames 'graphic-only) | |
4009 | (display-graphic-p) | |
4010 | pop-up-frames)) | |
4011 | ;; `frame-to-use' is the frame where to show `buffer' - either | |
4012 | ;; the selected frame or the last nonminibuffer frame. | |
4013 | (frame-to-use | |
4014 | (or (window--frame-usable-p (selected-frame)) | |
4015 | (window--frame-usable-p (last-nonminibuffer-frame)))) | |
4016 | ;; `window-to-use' is the window we use for showing `buffer'. | |
4017 | window-to-use) | |
4018 | (cond | |
4019 | ((not (buffer-live-p buffer)) | |
4020 | (error "No such buffer %s" buffer)) | |
4021 | (display-buffer-function | |
4022 | ;; Let `display-buffer-function' do the job. | |
4023 | (funcall display-buffer-function buffer not-this-window)) | |
4024 | ((and (not not-this-window) | |
4025 | (eq (window-buffer (selected-window)) buffer)) | |
4026 | ;; The selected window already displays BUFFER and | |
4027 | ;; `not-this-window' is nil, so use it. | |
4028 | (window--display-buffer-1 (selected-window))) | |
4029 | ((and can-use-selected-window (same-window-p name-of-buffer)) | |
4030 | ;; If the buffer's name tells us to use the selected window do so. | |
4031 | (window--display-buffer-2 buffer (selected-window))) | |
4032 | ((let ((frames (or frame | |
4033 | (and (or use-pop-up-frames | |
4034 | display-buffer-reuse-frames | |
4035 | (not (last-nonminibuffer-frame))) | |
4036 | 0) | |
4037 | (last-nonminibuffer-frame)))) | |
e331bbf3 MR |
4038 | (setq window-to-use |
4039 | (catch 'found | |
29c45500 MR |
4040 | ;; Search frames for a window displaying BUFFER. Return |
4041 | ;; the selected window only if we are allowed to do so. | |
4042 | (dolist (window (get-buffer-window-list buffer 'nomini frames)) | |
e331bbf3 MR |
4043 | (when (or can-use-selected-window |
4044 | (not (eq (selected-window) window))) | |
4045 | (throw 'found window)))))) | |
4046 | ;; The buffer is already displayed in some window; use that. | |
3c448ab6 MR |
4047 | (window--display-buffer-1 window-to-use)) |
4048 | ((and special-display-function | |
4049 | ;; `special-display-p' returns either t or a list of frame | |
4050 | ;; parameters to pass to `special-display-function'. | |
4051 | (let ((pars (special-display-p name-of-buffer))) | |
4052 | (when pars | |
4053 | (funcall special-display-function | |
4054 | buffer (if (listp pars) pars)))))) | |
4055 | ((or use-pop-up-frames (not frame-to-use)) | |
4056 | ;; We want or need a new frame. | |
d2c9fc42 | 4057 | (let ((win (frame-selected-window (funcall pop-up-frame-function)))) |
04ae543a | 4058 | (window--display-buffer-2 buffer win display-buffer-mark-dedicated))) |
3c448ab6 MR |
4059 | ((and pop-up-windows |
4060 | ;; Make a new window. | |
4061 | (or (not (frame-parameter frame-to-use 'unsplittable)) | |
4062 | ;; If the selected frame cannot be split look at | |
4063 | ;; `last-nonminibuffer-frame'. | |
4064 | (and (eq frame-to-use (selected-frame)) | |
4065 | (setq frame-to-use (last-nonminibuffer-frame)) | |
4066 | (window--frame-usable-p frame-to-use) | |
4067 | (not (frame-parameter frame-to-use 'unsplittable)))) | |
4068 | ;; Attempt to split largest or least recently used window. | |
4069 | (setq window-to-use | |
4070 | (or (window--try-to-split-window | |
4071 | (get-largest-window frame-to-use t)) | |
4072 | (window--try-to-split-window | |
d2c9fc42 | 4073 | (get-lru-window frame-to-use t))))) |
04ae543a SM |
4074 | (window--display-buffer-2 buffer window-to-use |
4075 | display-buffer-mark-dedicated)) | |
a9d451f0 MR |
4076 | ((let ((window-to-undedicate |
4077 | ;; When NOT-THIS-WINDOW is non-nil, temporarily dedicate | |
4078 | ;; the selected window to its buffer, to avoid that some of | |
4079 | ;; the `get-' routines below choose it. (Bug#1415) | |
4080 | (and not-this-window (not (window-dedicated-p)) | |
4081 | (set-window-dedicated-p (selected-window) t) | |
4082 | (selected-window)))) | |
4083 | (unwind-protect | |
4084 | (setq window-to-use | |
4085 | ;; Reuse an existing window. | |
4086 | (or (get-lru-window frame-to-use) | |
4087 | (let ((window (get-buffer-window buffer 'visible))) | |
4088 | (unless (and not-this-window | |
4089 | (eq window (selected-window))) | |
4090 | window)) | |
4091 | (get-largest-window 'visible) | |
4092 | (let ((window (get-buffer-window buffer 0))) | |
4093 | (unless (and not-this-window | |
4094 | (eq window (selected-window))) | |
4095 | window)) | |
4096 | (get-largest-window 0) | |
4097 | (frame-selected-window (funcall pop-up-frame-function)))) | |
4098 | (when (window-live-p window-to-undedicate) | |
4099 | ;; Restore dedicated status of selected window. | |
4100 | (set-window-dedicated-p window-to-undedicate nil)))) | |
3c448ab6 MR |
4101 | (window--even-window-heights window-to-use) |
4102 | (window--display-buffer-2 buffer window-to-use))))) | |
4103 | ||
9397e56f MR |
4104 | (defun display-buffer-other-frame (buffer) |
4105 | "Display buffer BUFFER in another frame. | |
4106 | This uses the function `display-buffer' as a subroutine; see | |
4107 | its documentation for additional customization information." | |
4108 | (interactive "BDisplay buffer in other frame: ") | |
4109 | (let ((pop-up-frames t) | |
4110 | same-window-buffer-names same-window-regexps | |
4111 | ;;(old-window (selected-window)) | |
4112 | new-window) | |
4113 | (setq new-window (display-buffer buffer t)) | |
4114 | ;; This may have been here in order to prevent the new frame from hiding | |
4115 | ;; the old frame. But it does more harm than good. | |
4116 | ;; Maybe we should call `raise-window' on the old-frame instead? --Stef | |
4117 | ;;(lower-frame (window-frame new-window)) | |
4118 | ||
4119 | ;; This may have been here in order to make sure the old-frame gets the | |
4120 | ;; focus. But not only can it cause an annoying flicker, with some | |
4121 | ;; window-managers it just makes the window invisible, with no easy | |
4122 | ;; way to recover it. --Stef | |
4123 | ;;(make-frame-invisible (window-frame old-window)) | |
4124 | ;;(make-frame-visible (window-frame old-window)) | |
4125 | )) | |
4126 | ||
3c448ab6 MR |
4127 | (defun pop-to-buffer (buffer-or-name &optional other-window norecord) |
4128 | "Select buffer BUFFER-OR-NAME in some window, preferably a different one. | |
4129 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
4130 | nil. If BUFFER-OR-NAME is a string not naming an existent | |
4131 | buffer, create a buffer with that name. If BUFFER-OR-NAME is | |
4132 | nil, choose some other buffer. | |
4133 | ||
4134 | If `pop-up-windows' is non-nil, windows can be split to display | |
4135 | the buffer. If optional second arg OTHER-WINDOW is non-nil, | |
4136 | insist on finding another window even if the specified buffer is | |
4137 | already visible in the selected window, and ignore | |
4138 | `same-window-regexps' and `same-window-buffer-names'. | |
4139 | ||
4140 | If the window to show BUFFER-OR-NAME is not on the selected | |
4141 | frame, raise that window's frame and give it input focus. | |
4142 | ||
4143 | This function returns the buffer it switched to. This uses the | |
4144 | function `display-buffer' as a subroutine; see the documentation | |
4145 | of `display-buffer' for additional customization information. | |
4146 | ||
4147 | Optional third arg NORECORD non-nil means do not put this buffer | |
4148 | at the front of the list of recently selected ones." | |
4149 | (let ((buffer | |
4150 | ;; FIXME: This behavior is carried over from the previous C version | |
4151 | ;; of pop-to-buffer, but really we should use just | |
4152 | ;; `get-buffer' here. | |
4153 | (if (null buffer-or-name) (other-buffer (current-buffer)) | |
4154 | (or (get-buffer buffer-or-name) | |
4155 | (let ((buf (get-buffer-create buffer-or-name))) | |
4156 | (set-buffer-major-mode buf) | |
4157 | buf)))) | |
3c448ab6 MR |
4158 | (old-frame (selected-frame)) |
4159 | new-window new-frame) | |
4160 | (set-buffer buffer) | |
4161 | (setq new-window (display-buffer buffer other-window)) | |
13b5221f MR |
4162 | (select-window new-window norecord) |
4163 | (setq new-frame (window-frame new-window)) | |
4164 | (unless (eq new-frame old-frame) | |
4165 | ;; `display-buffer' has chosen another frame, make sure it gets | |
4166 | ;; input focus and is risen. | |
4167 | (select-frame-set-input-focus new-frame)) | |
3c448ab6 | 4168 | buffer)) |
9397e56f MR |
4169 | |
4170 | (defun read-buffer-to-switch (prompt) | |
4171 | "Read the name of a buffer to switch to, prompting with PROMPT. | |
4172 | Return the neame of the buffer as a string. | |
4173 | ||
4174 | This function is intended for the `switch-to-buffer' family of | |
4175 | commands since these need to omit the name of the current buffer | |
4176 | from the list of completions and default values." | |
4177 | (let ((rbts-completion-table (internal-complete-buffer-except))) | |
4178 | (minibuffer-with-setup-hook | |
4179 | (lambda () | |
4180 | (setq minibuffer-completion-table rbts-completion-table) | |
4181 | ;; Since rbts-completion-table is built dynamically, we | |
4182 | ;; can't just add it to the default value of | |
4183 | ;; icomplete-with-completion-tables, so we add it | |
4184 | ;; here manually. | |
4185 | (if (and (boundp 'icomplete-with-completion-tables) | |
4186 | (listp icomplete-with-completion-tables)) | |
4187 | (set (make-local-variable 'icomplete-with-completion-tables) | |
4188 | (cons rbts-completion-table | |
4189 | icomplete-with-completion-tables)))) | |
4190 | (read-buffer prompt (other-buffer (current-buffer)) | |
4191 | (confirm-nonexistent-file-or-buffer))))) | |
4192 | ||
4193 | (defun normalize-buffer-to-switch-to (buffer-or-name) | |
4194 | "Normalize BUFFER-OR-NAME argument of buffer switching functions. | |
4195 | If BUFFER-OR-NAME is nil, return the buffer returned by | |
4196 | `other-buffer'. Else, if a buffer specified by BUFFER-OR-NAME | |
4197 | exists, return that buffer. If no such buffer exists, create a | |
4198 | buffer with the name BUFFER-OR-NAME and return that buffer." | |
4199 | (if buffer-or-name | |
4200 | (or (get-buffer buffer-or-name) | |
4201 | (let ((buffer (get-buffer-create buffer-or-name))) | |
4202 | (set-buffer-major-mode buffer) | |
4203 | buffer)) | |
4204 | (other-buffer))) | |
4205 | ||
4206 | (defun switch-to-buffer (buffer-or-name &optional norecord) | |
4207 | "Switch to buffer BUFFER-OR-NAME in the selected window. | |
4208 | If called interactively, prompt for the buffer name using the | |
4209 | minibuffer. The variable `confirm-nonexistent-file-or-buffer' | |
4210 | determines whether to request confirmation before creating a new | |
4211 | buffer. | |
4212 | ||
4213 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
4214 | nil. If BUFFER-OR-NAME is a string that does not identify an | |
4215 | existing buffer, create a buffer with that name. If | |
4216 | BUFFER-OR-NAME is nil, switch to the buffer returned by | |
4217 | `other-buffer'. | |
4218 | ||
4219 | Optional argument NORECORD non-nil means do not put the buffer | |
4220 | specified by BUFFER-OR-NAME at the front of the buffer list and | |
4221 | do not make the window displaying it the most recently selected | |
4222 | one. Return the buffer switched to. | |
4223 | ||
4224 | This function is intended for interactive use only. Lisp | |
4225 | functions should call `pop-to-buffer-same-window' instead." | |
4226 | (interactive | |
4227 | (list (read-buffer-to-switch "Switch to buffer: "))) | |
4228 | (let ((buffer (normalize-buffer-to-switch-to buffer-or-name))) | |
4229 | (if (and (or (window-minibuffer-p) (eq (window-dedicated-p) t)) | |
4230 | (not (eq buffer (window-buffer)))) | |
4231 | ;; Cannot switch to another buffer in a minibuffer or strongly | |
4232 | ;; dedicated window that does not show the buffer already. Call | |
4233 | ;; `pop-to-buffer' instead. | |
4234 | (pop-to-buffer buffer nil norecord) | |
4235 | (unless (eq buffer (window-buffer)) | |
4236 | ;; I'm not sure why we should NOT call `set-window-buffer' here, | |
4237 | ;; but let's keep things as they are (otherwise we could always | |
4238 | ;; call `pop-to-buffer-same-window' here). | |
4239 | (set-window-buffer nil buffer)) | |
4240 | (unless norecord | |
4241 | (select-window (selected-window))) | |
4242 | (set-buffer buffer)))) | |
4243 | ||
4244 | (defun switch-to-buffer-other-window (buffer-or-name &optional norecord) | |
4245 | "Select the buffer specified by BUFFER-OR-NAME in another window. | |
4246 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
4247 | nil. Return the buffer switched to. | |
4248 | ||
4249 | If called interactively, prompt for the buffer name using the | |
4250 | minibuffer. The variable `confirm-nonexistent-file-or-buffer' | |
4251 | determines whether to request confirmation before creating a new | |
4252 | buffer. | |
4253 | ||
4254 | If BUFFER-OR-NAME is a string and does not identify an existing | |
4255 | buffer, create a new buffer with that name. If BUFFER-OR-NAME is | |
4256 | nil, switch to the buffer returned by `other-buffer'. | |
4257 | ||
4258 | Optional second argument NORECORD non-nil means do not put this | |
4259 | buffer at the front of the list of recently selected ones. | |
4260 | ||
4261 | This uses the function `display-buffer' as a subroutine; see its | |
4262 | documentation for additional customization information." | |
4263 | (interactive | |
4264 | (list (read-buffer-to-switch "Switch to buffer in other window: "))) | |
4265 | (let ((pop-up-windows t) | |
4266 | same-window-buffer-names same-window-regexps) | |
4267 | (pop-to-buffer buffer-or-name t norecord))) | |
4268 | ||
4269 | (defun switch-to-buffer-other-frame (buffer-or-name &optional norecord) | |
4270 | "Switch to buffer BUFFER-OR-NAME in another frame. | |
4271 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
4272 | nil. Return the buffer switched to. | |
4273 | ||
4274 | If called interactively, prompt for the buffer name using the | |
4275 | minibuffer. The variable `confirm-nonexistent-file-or-buffer' | |
4276 | determines whether to request confirmation before creating a new | |
4277 | buffer. | |
4278 | ||
4279 | If BUFFER-OR-NAME is a string and does not identify an existing | |
4280 | buffer, create a new buffer with that name. If BUFFER-OR-NAME is | |
4281 | nil, switch to the buffer returned by `other-buffer'. | |
4282 | ||
4283 | Optional second arg NORECORD non-nil means do not put this | |
4284 | buffer at the front of the list of recently selected ones. | |
4285 | ||
4286 | This uses the function `display-buffer' as a subroutine; see its | |
4287 | documentation for additional customization information." | |
4288 | (interactive | |
4289 | (list (read-buffer-to-switch "Switch to buffer in other frame: "))) | |
4290 | (let ((pop-up-frames t) | |
4291 | same-window-buffer-names same-window-regexps) | |
4292 | (pop-to-buffer buffer-or-name t norecord))) | |
3c448ab6 MR |
4293 | \f |
4294 | (defun set-window-text-height (window height) | |
9992ea0c | 4295 | "Set the height in lines of the text display area of WINDOW to HEIGHT. |
6198ccd0 MR |
4296 | WINDOW must be a live window. HEIGHT doesn't include the mode |
4297 | line or header line, if any, or any partial-height lines in the | |
4298 | text display area. | |
3c448ab6 MR |
4299 | |
4300 | Note that the current implementation of this function cannot | |
4301 | always set the height exactly, but attempts to be conservative, | |
4302 | by allocating more lines than are actually needed in the case | |
4303 | where some error may be present." | |
6198ccd0 | 4304 | (setq window (normalize-live-window window)) |
3c448ab6 MR |
4305 | (let ((delta (- height (window-text-height window)))) |
4306 | (unless (zerop delta) | |
4307 | ;; Setting window-min-height to a value like 1 can lead to very | |
4308 | ;; bizarre displays because it also allows Emacs to make *other* | |
4309 | ;; windows 1-line tall, which means that there's no more space for | |
4310 | ;; the modeline. | |
4311 | (let ((window-min-height (min 2 height))) ; One text line plus a modeline. | |
6198ccd0 | 4312 | (resize-window window delta))))) |
3c448ab6 | 4313 | |
6198ccd0 MR |
4314 | (defun enlarge-window-horizontally (delta) |
4315 | "Make selected window DELTA columns wider. | |
3c448ab6 MR |
4316 | Interactively, if no argument is given, make selected window one |
4317 | column wider." | |
4318 | (interactive "p") | |
6198ccd0 | 4319 | (enlarge-window delta t)) |
3c448ab6 | 4320 | |
6198ccd0 MR |
4321 | (defun shrink-window-horizontally (delta) |
4322 | "Make selected window DELTA columns narrower. | |
3c448ab6 MR |
4323 | Interactively, if no argument is given, make selected window one |
4324 | column narrower." | |
4325 | (interactive "p") | |
6198ccd0 | 4326 | (shrink-window delta t)) |
3c448ab6 MR |
4327 | |
4328 | (defun count-screen-lines (&optional beg end count-final-newline window) | |
4329 | "Return the number of screen lines in the region. | |
4330 | The number of screen lines may be different from the number of actual lines, | |
4331 | due to line breaking, display table, etc. | |
4332 | ||
4333 | Optional arguments BEG and END default to `point-min' and `point-max' | |
4334 | respectively. | |
4335 | ||
4336 | If region ends with a newline, ignore it unless optional third argument | |
4337 | COUNT-FINAL-NEWLINE is non-nil. | |
4338 | ||
4339 | The optional fourth argument WINDOW specifies the window used for obtaining | |
4340 | parameters such as width, horizontal scrolling, and so on. The default is | |
4341 | to use the selected window's parameters. | |
4342 | ||
4343 | Like `vertical-motion', `count-screen-lines' always uses the current buffer, | |
4344 | regardless of which buffer is displayed in WINDOW. This makes possible to use | |
4345 | `count-screen-lines' in any buffer, whether or not it is currently displayed | |
4346 | in some window." | |
4347 | (unless beg | |
4348 | (setq beg (point-min))) | |
4349 | (unless end | |
4350 | (setq end (point-max))) | |
4351 | (if (= beg end) | |
4352 | 0 | |
4353 | (save-excursion | |
4354 | (save-restriction | |
4355 | (widen) | |
4356 | (narrow-to-region (min beg end) | |
4357 | (if (and (not count-final-newline) | |
4358 | (= ?\n (char-before (max beg end)))) | |
4359 | (1- (max beg end)) | |
4360 | (max beg end))) | |
4361 | (goto-char (point-min)) | |
4362 | (1+ (vertical-motion (buffer-size) window)))))) | |
4363 | ||
6198ccd0 MR |
4364 | (defun window-buffer-height (window) |
4365 | "Return the height (in screen lines) of the buffer that WINDOW is displaying." | |
4366 | (with-current-buffer (window-buffer window) | |
4367 | (max 1 | |
4368 | (count-screen-lines (point-min) (point-max) | |
4369 | ;; If buffer ends with a newline, ignore it when | |
4370 | ;; counting height unless point is after it. | |
4371 | (eobp) | |
4372 | window)))) | |
4373 | ||
4374 | ;;; Resizing buffers to fit their contents exactly. | |
4375 | (defun fit-window-to-buffer (&optional window max-height min-height override) | |
3c448ab6 | 4376 | "Adjust height of WINDOW to display its buffer's contents exactly. |
6198ccd0 MR |
4377 | WINDOW can be any live window and defaults to the selected one. |
4378 | ||
4379 | Optional argument MAX-HEIGHT specifies the maximum height of | |
4380 | WINDOW and defaults to the height of WINDOW's frame. Optional | |
4381 | argument MIN-HEIGHT specifies the minimum height of WINDOW and | |
4382 | defaults to `window-min-height'. Both, MAX-HEIGHT and MIN-HEIGHT | |
4383 | are specified in lines and include the mode line and header line, | |
4384 | if any. | |
4385 | ||
4386 | Optional argument OVERRIDE non-nil means override restrictions | |
4387 | imposed by `window-min-height' and `window-min-width' on the size | |
4388 | of WINDOW. | |
4389 | ||
4390 | Return the number of lines by which WINDOW was enlarged or | |
4391 | shrunk. If an error occurs during resizing, return nil but don't | |
4392 | signal an error. | |
4393 | ||
4394 | Note that even if this function makes WINDOW large enough to show | |
4395 | _all_ lines of its buffer you might not see the first lines when | |
4396 | WINDOW was scrolled." | |
f7baca20 MR |
4397 | (interactive) |
4398 | ;; Do all the work in WINDOW and its buffer and restore the selected | |
4399 | ;; window and the current buffer when we're done. | |
6198ccd0 MR |
4400 | (setq window (normalize-live-window window)) |
4401 | ;; Can't resize a full height or fixed-size window. | |
4402 | (unless (or (window-size-fixed-p window) | |
4403 | (window-full-height-p window)) | |
4404 | ;; `with-selected-window' should orderly restore the current buffer. | |
4405 | (with-selected-window window | |
4406 | ;; We are in WINDOW's buffer now. | |
4407 | (let* ( ;; Adjust MIN-HEIGHT. | |
4408 | (min-height | |
4409 | (if override | |
4410 | (window-min-size window nil window) | |
4411 | (max (or min-height window-min-height) | |
4412 | window-safe-min-height))) | |
4413 | (max-window-height | |
4414 | (window-total-size (frame-root-window window))) | |
4415 | ;; Adjust MAX-HEIGHT. | |
4416 | (max-height | |
4417 | (if (or override (not max-height)) | |
4418 | max-window-height | |
4419 | (min max-height max-window-height))) | |
4420 | ;; Make `desired-height' the height necessary to show | |
4421 | ;; all of WINDOW's buffer, constrained by MIN-HEIGHT | |
4422 | ;; and MAX-HEIGHT. | |
4423 | (desired-height | |
4424 | (max | |
4425 | (min | |
4426 | (+ (count-screen-lines) | |
4427 | ;; For non-minibuffers count the mode line, if any. | |
4428 | (if (and (not (window-minibuffer-p window)) | |
4429 | mode-line-format) | |
4430 | 1 | |
4431 | 0) | |
4432 | ;; Count the header line, if any. | |
4433 | (if header-line-format 1 0)) | |
4434 | max-height) | |
4435 | min-height)) | |
4436 | (desired-delta | |
4437 | (- desired-height (window-total-size window))) | |
4438 | (delta | |
4439 | (if (> desired-delta 0) | |
4440 | (min desired-delta | |
4441 | (window-max-delta window nil window)) | |
4442 | (max desired-delta | |
4443 | (- (window-min-delta window nil window)))))) | |
4444 | ;; This `condition-case' shouldn't be necessary, but who knows? | |
4445 | (condition-case nil | |
4446 | (if (zerop delta) | |
4447 | ;; Return zero if DELTA became zero in the proces. | |
4448 | 0 | |
4449 | ;; Don't try to redisplay with the cursor at the end on its | |
4450 | ;; own line--that would force a scroll and spoil things. | |
4451 | (when (and (eobp) (bolp) (not (bobp))) | |
4452 | ;; It's silly to put `point' at the end of the previous | |
4453 | ;; line and so maybe force horizontal scrolling. | |
4454 | (set-window-point window (line-beginning-position 0))) | |
4455 | ;; Call `resize-window' with OVERRIDE argument equal WINDOW. | |
4456 | (resize-window window delta nil window) | |
f7baca20 MR |
4457 | ;; Check if the last line is surely fully visible. If |
4458 | ;; not, enlarge the window. | |
4459 | (let ((end (save-excursion | |
4460 | (goto-char (point-max)) | |
4461 | (when (and (bolp) (not (bobp))) | |
4462 | ;; Don't include final newline. | |
4463 | (backward-char 1)) | |
4464 | (when truncate-lines | |
4465 | ;; If line-wrapping is turned off, test the | |
4466 | ;; beginning of the last line for | |
4467 | ;; visibility instead of the end, as the | |
4468 | ;; end of the line could be invisible by | |
4469 | ;; virtue of extending past the edge of the | |
4470 | ;; window. | |
4471 | (forward-line 0)) | |
4472 | (point)))) | |
4473 | (set-window-vscroll window 0) | |
6198ccd0 MR |
4474 | ;; This loop might in some rare pathological cases raise |
4475 | ;; an error - another reason for the `condition-case'. | |
f7baca20 | 4476 | (while (and (< desired-height max-height) |
6198ccd0 | 4477 | (= desired-height (window-total-size)) |
f7baca20 | 4478 | (not (pos-visible-in-window-p end))) |
6198ccd0 MR |
4479 | (resize-window window 1 nil window) |
4480 | (setq desired-height (1+ desired-height))))) | |
4481 | (error (setq delta nil))) | |
4482 | delta)))) | |
3c448ab6 MR |
4483 | |
4484 | (defun shrink-window-if-larger-than-buffer (&optional window) | |
4485 | "Shrink height of WINDOW if its buffer doesn't need so many lines. | |
4486 | More precisely, shrink WINDOW vertically to be as small as | |
4487 | possible, while still showing the full contents of its buffer. | |
4488 | WINDOW defaults to the selected window. | |
4489 | ||
6198ccd0 MR |
4490 | Do not shrink WINDOW to less than `window-min-height' lines. Do |
4491 | nothing if the buffer contains more lines than the present window | |
4492 | height, or if some of the window's contents are scrolled out of | |
4493 | view, or if shrinking this window would also shrink another | |
4494 | window, or if the window is the only window of its frame. | |
3c448ab6 MR |
4495 | |
4496 | Return non-nil if the window was shrunk, nil otherwise." | |
4497 | (interactive) | |
6198ccd0 MR |
4498 | (setq window (normalize-live-window window)) |
4499 | ;; Make sure that WINDOW is vertically combined and `point-min' is | |
4500 | ;; visible (for whatever reason that's needed). The remaining issues | |
4501 | ;; should be taken care of by `fit-window-to-buffer'. | |
4502 | (when (and (window-iso-combined-p window) | |
4503 | (pos-visible-in-window-p (point-min) window)) | |
4504 | (fit-window-to-buffer window (window-total-size window)))) | |
4505 | \f | |
3c448ab6 MR |
4506 | (defun kill-buffer-and-window () |
4507 | "Kill the current buffer and delete the selected window." | |
4508 | (interactive) | |
4509 | (let ((window-to-delete (selected-window)) | |
4510 | (buffer-to-kill (current-buffer)) | |
6198ccd0 | 4511 | (delete-window-hook (lambda () (ignore-errors (delete-window))))) |
3c448ab6 MR |
4512 | (unwind-protect |
4513 | (progn | |
4514 | (add-hook 'kill-buffer-hook delete-window-hook t t) | |
4515 | (if (kill-buffer (current-buffer)) | |
4516 | ;; If `delete-window' failed before, we rerun it to regenerate | |
4517 | ;; the error so it can be seen in the echo area. | |
4518 | (when (eq (selected-window) window-to-delete) | |
4519 | (delete-window)))) | |
4520 | ;; If the buffer is not dead for some reason (probably because | |
4521 | ;; of a `quit' signal), remove the hook again. | |
6198ccd0 MR |
4522 | (ignore-errors |
4523 | (with-current-buffer buffer-to-kill | |
4524 | (remove-hook 'kill-buffer-hook delete-window-hook t)))))) | |
3c448ab6 MR |
4525 | |
4526 | (defun quit-window (&optional kill window) | |
4527 | "Quit WINDOW and bury its buffer. | |
4528 | With a prefix argument, kill the buffer instead. WINDOW defaults | |
4529 | to the selected window. | |
4530 | ||
4531 | If WINDOW is non-nil, dedicated, or a minibuffer window, delete | |
4532 | it and, if it's alone on its frame, its frame too. Otherwise, or | |
4533 | if deleting WINDOW fails in any of the preceding cases, display | |
4534 | another buffer in WINDOW using `switch-to-buffer'. | |
4535 | ||
4536 | Optional argument KILL non-nil means kill WINDOW's buffer. | |
4537 | Otherwise, bury WINDOW's buffer, see `bury-buffer'." | |
4538 | (interactive "P") | |
4539 | (let ((buffer (window-buffer window))) | |
4540 | (if (or window | |
4541 | (window-minibuffer-p window) | |
4542 | (window-dedicated-p window)) | |
4543 | ;; WINDOW is either non-nil, a minibuffer window, or dedicated; | |
4544 | ;; try to delete it. | |
a0c859f0 MR |
4545 | (let* ((window (or window (selected-window))) |
4546 | (frame (window-frame window))) | |
6198ccd0 MR |
4547 | (if (frame-root-window-p window) |
4548 | ;; WINDOW is alone on its frame. | |
4549 | (delete-frame frame) | |
3c448ab6 MR |
4550 | ;; There are other windows on its frame, delete WINDOW. |
4551 | (delete-window window))) | |
4552 | ;; Otherwise, switch to another buffer in the selected window. | |
4553 | (switch-to-buffer nil)) | |
4554 | ||
4555 | ;; Deal with the buffer. | |
4556 | (if kill | |
4557 | (kill-buffer buffer) | |
4558 | (bury-buffer buffer)))) | |
74f806a1 | 4559 | \f |
3c448ab6 MR |
4560 | (defvar recenter-last-op nil |
4561 | "Indicates the last recenter operation performed. | |
0116abbd JL |
4562 | Possible values: `top', `middle', `bottom', integer or float numbers.") |
4563 | ||
4564 | (defcustom recenter-positions '(middle top bottom) | |
4565 | "Cycling order for `recenter-top-bottom'. | |
4566 | A list of elements with possible values `top', `middle', `bottom', | |
4567 | integer or float numbers that define the cycling order for | |
4568 | the command `recenter-top-bottom'. | |
4569 | ||
4570 | Top and bottom destinations are `scroll-margin' lines the from true | |
4571 | window top and bottom. Middle redraws the frame and centers point | |
4572 | vertically within the window. Integer number moves current line to | |
4573 | the specified absolute window-line. Float number between 0.0 and 1.0 | |
4574 | means the percentage of the screen space from the top. The default | |
4575 | cycling order is middle -> top -> bottom." | |
4576 | :type '(repeat (choice | |
4577 | (const :tag "Top" top) | |
4578 | (const :tag "Middle" middle) | |
4579 | (const :tag "Bottom" bottom) | |
4580 | (integer :tag "Line number") | |
4581 | (float :tag "Percentage"))) | |
4582 | :version "23.2" | |
4583 | :group 'windows) | |
3c448ab6 MR |
4584 | |
4585 | (defun recenter-top-bottom (&optional arg) | |
0116abbd JL |
4586 | "Move current buffer line to the specified window line. |
4587 | With no prefix argument, successive calls place point according | |
4588 | to the cycling order defined by `recenter-positions'. | |
3c448ab6 MR |
4589 | |
4590 | A prefix argument is handled like `recenter': | |
4591 | With numeric prefix ARG, move current line to window-line ARG. | |
0116abbd | 4592 | With plain `C-u', move current line to window center." |
3c448ab6 MR |
4593 | (interactive "P") |
4594 | (cond | |
0116abbd | 4595 | (arg (recenter arg)) ; Always respect ARG. |
3c448ab6 | 4596 | (t |
0116abbd JL |
4597 | (setq recenter-last-op |
4598 | (if (eq this-command last-command) | |
4599 | (car (or (cdr (member recenter-last-op recenter-positions)) | |
4600 | recenter-positions)) | |
4601 | (car recenter-positions))) | |
3c448ab6 MR |
4602 | (let ((this-scroll-margin |
4603 | (min (max 0 scroll-margin) | |
4604 | (truncate (/ (window-body-height) 4.0))))) | |
4605 | (cond ((eq recenter-last-op 'middle) | |
0116abbd | 4606 | (recenter)) |
3c448ab6 | 4607 | ((eq recenter-last-op 'top) |
0116abbd JL |
4608 | (recenter this-scroll-margin)) |
4609 | ((eq recenter-last-op 'bottom) | |
4610 | (recenter (- -1 this-scroll-margin))) | |
4611 | ((integerp recenter-last-op) | |
4612 | (recenter recenter-last-op)) | |
4613 | ((floatp recenter-last-op) | |
4614 | (recenter (round (* recenter-last-op (window-height)))))))))) | |
3c448ab6 MR |
4615 | |
4616 | (define-key global-map [?\C-l] 'recenter-top-bottom) | |
216349f8 | 4617 | |
216349f8 SM |
4618 | (defun move-to-window-line-top-bottom (&optional arg) |
4619 | "Position point relative to window. | |
4620 | ||
0f202d5d | 4621 | With a prefix argument ARG, acts like `move-to-window-line'. |
216349f8 SM |
4622 | |
4623 | With no argument, positions point at center of window. | |
0116abbd JL |
4624 | Successive calls position point at positions defined |
4625 | by `recenter-positions'." | |
216349f8 SM |
4626 | (interactive "P") |
4627 | (cond | |
0116abbd | 4628 | (arg (move-to-window-line arg)) ; Always respect ARG. |
216349f8 | 4629 | (t |
0116abbd JL |
4630 | (setq recenter-last-op |
4631 | (if (eq this-command last-command) | |
4632 | (car (or (cdr (member recenter-last-op recenter-positions)) | |
4633 | recenter-positions)) | |
4634 | (car recenter-positions))) | |
216349f8 SM |
4635 | (let ((this-scroll-margin |
4636 | (min (max 0 scroll-margin) | |
4637 | (truncate (/ (window-body-height) 4.0))))) | |
0f202d5d | 4638 | (cond ((eq recenter-last-op 'middle) |
0116abbd | 4639 | (call-interactively 'move-to-window-line)) |
0f202d5d | 4640 | ((eq recenter-last-op 'top) |
0116abbd JL |
4641 | (move-to-window-line this-scroll-margin)) |
4642 | ((eq recenter-last-op 'bottom) | |
4643 | (move-to-window-line (- -1 this-scroll-margin))) | |
4644 | ((integerp recenter-last-op) | |
4645 | (move-to-window-line recenter-last-op)) | |
4646 | ((floatp recenter-last-op) | |
4647 | (move-to-window-line (round (* recenter-last-op (window-height)))))))))) | |
216349f8 SM |
4648 | |
4649 | (define-key global-map [?\M-r] 'move-to-window-line-top-bottom) | |
3c448ab6 | 4650 | \f |
74f806a1 JL |
4651 | ;;; Scrolling commands. |
4652 | ||
4653 | ;;; Scrolling commands which does not signal errors at top/bottom | |
4654 | ;;; of buffer at first key-press (instead moves to top/bottom | |
4655 | ;;; of buffer). | |
4656 | ||
4657 | (defcustom scroll-error-top-bottom nil | |
4658 | "Move point to top/bottom of buffer before signalling a scrolling error. | |
4659 | A value of nil means just signal an error if no more scrolling possible. | |
4660 | A value of t means point moves to the beginning or the end of the buffer | |
4661 | \(depending on scrolling direction) when no more scrolling possible. | |
4662 | When point is already on that position, then signal an error." | |
4663 | :type 'boolean | |
4664 | :group 'scrolling | |
4665 | :version "24.1") | |
4666 | ||
4667 | (defun scroll-up-command (&optional arg) | |
4668 | "Scroll text of selected window upward ARG lines; or near full screen if no ARG. | |
4669 | If `scroll-error-top-bottom' is non-nil and `scroll-up' cannot | |
4670 | scroll window further, move cursor to the bottom line. | |
4671 | When point is already on that position, then signal an error. | |
4672 | A near full screen is `next-screen-context-lines' less than a full screen. | |
4673 | Negative ARG means scroll downward. | |
4674 | If ARG is the atom `-', scroll downward by nearly full screen." | |
4675 | (interactive "^P") | |
4676 | (cond | |
4677 | ((null scroll-error-top-bottom) | |
4678 | (scroll-up arg)) | |
4679 | ((eq arg '-) | |
4680 | (scroll-down-command nil)) | |
4681 | ((< (prefix-numeric-value arg) 0) | |
4682 | (scroll-down-command (- (prefix-numeric-value arg)))) | |
4683 | ((eobp) | |
4684 | (scroll-up arg)) ; signal error | |
4685 | (t | |
4686 | (condition-case nil | |
4687 | (scroll-up arg) | |
4688 | (end-of-buffer | |
4689 | (if arg | |
4690 | ;; When scrolling by ARG lines can't be done, | |
4691 | ;; move by ARG lines instead. | |
4692 | (forward-line arg) | |
4693 | ;; When ARG is nil for full-screen scrolling, | |
4694 | ;; move to the bottom of the buffer. | |
4695 | (goto-char (point-max)))))))) | |
4696 | ||
4697 | (put 'scroll-up-command 'scroll-command t) | |
4698 | ||
4699 | (defun scroll-down-command (&optional arg) | |
4700 | "Scroll text of selected window down ARG lines; or near full screen if no ARG. | |
4701 | If `scroll-error-top-bottom' is non-nil and `scroll-down' cannot | |
4702 | scroll window further, move cursor to the top line. | |
4703 | When point is already on that position, then signal an error. | |
4704 | A near full screen is `next-screen-context-lines' less than a full screen. | |
4705 | Negative ARG means scroll upward. | |
4706 | If ARG is the atom `-', scroll upward by nearly full screen." | |
4707 | (interactive "^P") | |
4708 | (cond | |
4709 | ((null scroll-error-top-bottom) | |
4710 | (scroll-down arg)) | |
4711 | ((eq arg '-) | |
4712 | (scroll-up-command nil)) | |
4713 | ((< (prefix-numeric-value arg) 0) | |
4714 | (scroll-up-command (- (prefix-numeric-value arg)))) | |
4715 | ((bobp) | |
4716 | (scroll-down arg)) ; signal error | |
4717 | (t | |
4718 | (condition-case nil | |
4719 | (scroll-down arg) | |
4720 | (beginning-of-buffer | |
4721 | (if arg | |
4722 | ;; When scrolling by ARG lines can't be done, | |
4723 | ;; move by ARG lines instead. | |
4724 | (forward-line (- arg)) | |
4725 | ;; When ARG is nil for full-screen scrolling, | |
4726 | ;; move to the top of the buffer. | |
4727 | (goto-char (point-min)))))))) | |
4728 | ||
4729 | (put 'scroll-down-command 'scroll-command t) | |
4730 | ||
4731 | ;;; Scrolling commands which scroll a line instead of full screen. | |
4732 | ||
4733 | (defun scroll-up-line (&optional arg) | |
4734 | "Scroll text of selected window upward ARG lines; or one line if no ARG. | |
4735 | If ARG is omitted or nil, scroll upward by one line. | |
4736 | This is different from `scroll-up-command' that scrolls a full screen." | |
4737 | (interactive "p") | |
4738 | (scroll-up (or arg 1))) | |
4739 | ||
4740 | (put 'scroll-up-line 'scroll-command t) | |
4741 | ||
4742 | (defun scroll-down-line (&optional arg) | |
4743 | "Scroll text of selected window down ARG lines; or one line if no ARG. | |
4744 | If ARG is omitted or nil, scroll down by one line. | |
4745 | This is different from `scroll-down-command' that scrolls a full screen." | |
4746 | (interactive "p") | |
4747 | (scroll-down (or arg 1))) | |
4748 | ||
4749 | (put 'scroll-down-line 'scroll-command t) | |
4750 | ||
4751 | \f | |
4752 | (defun scroll-other-window-down (lines) | |
4753 | "Scroll the \"other window\" down. | |
4754 | For more details, see the documentation for `scroll-other-window'." | |
4755 | (interactive "P") | |
4756 | (scroll-other-window | |
4757 | ;; Just invert the argument's meaning. | |
4758 | ;; We can do that without knowing which window it will be. | |
4759 | (if (eq lines '-) nil | |
4760 | (if (null lines) '- | |
4761 | (- (prefix-numeric-value lines)))))) | |
4762 | ||
4763 | (defun beginning-of-buffer-other-window (arg) | |
4764 | "Move point to the beginning of the buffer in the other window. | |
4765 | Leave mark at previous position. | |
4766 | With arg N, put point N/10 of the way from the true beginning." | |
4767 | (interactive "P") | |
4768 | (let ((orig-window (selected-window)) | |
4769 | (window (other-window-for-scrolling))) | |
4770 | ;; We use unwind-protect rather than save-window-excursion | |
4771 | ;; because the latter would preserve the things we want to change. | |
4772 | (unwind-protect | |
4773 | (progn | |
4774 | (select-window window) | |
4775 | ;; Set point and mark in that window's buffer. | |
4776 | (with-no-warnings | |
4777 | (beginning-of-buffer arg)) | |
4778 | ;; Set point accordingly. | |
4779 | (recenter '(t))) | |
4780 | (select-window orig-window)))) | |
4781 | ||
4782 | (defun end-of-buffer-other-window (arg) | |
4783 | "Move point to the end of the buffer in the other window. | |
4784 | Leave mark at previous position. | |
4785 | With arg N, put point N/10 of the way from the true end." | |
4786 | (interactive "P") | |
4787 | ;; See beginning-of-buffer-other-window for comments. | |
4788 | (let ((orig-window (selected-window)) | |
4789 | (window (other-window-for-scrolling))) | |
4790 | (unwind-protect | |
4791 | (progn | |
4792 | (select-window window) | |
4793 | (with-no-warnings | |
4794 | (end-of-buffer arg)) | |
4795 | (recenter '(t))) | |
4796 | (select-window orig-window)))) | |
74f806a1 | 4797 | \f |
3c448ab6 MR |
4798 | (defvar mouse-autoselect-window-timer nil |
4799 | "Timer used by delayed window autoselection.") | |
4800 | ||
4801 | (defvar mouse-autoselect-window-position nil | |
4802 | "Last mouse position recorded by delayed window autoselection.") | |
4803 | ||
4804 | (defvar mouse-autoselect-window-window nil | |
4805 | "Last window recorded by delayed window autoselection.") | |
4806 | ||
4807 | (defvar mouse-autoselect-window-state nil | |
4808 | "When non-nil, special state of delayed window autoselection. | |
4809 | Possible values are `suspend' \(suspend autoselection after a menu or | |
4810 | scrollbar interaction\) and `select' \(the next invocation of | |
4811 | 'handle-select-window' shall select the window immediately\).") | |
4812 | ||
4813 | (defun mouse-autoselect-window-cancel (&optional force) | |
4814 | "Cancel delayed window autoselection. | |
4815 | Optional argument FORCE means cancel unconditionally." | |
4816 | (unless (and (not force) | |
4817 | ;; Don't cancel for select-window or select-frame events | |
4818 | ;; or when the user drags a scroll bar. | |
4819 | (or (memq this-command | |
4820 | '(handle-select-window handle-switch-frame)) | |
4821 | (and (eq this-command 'scroll-bar-toolkit-scroll) | |
4822 | (memq (nth 4 (event-end last-input-event)) | |
4823 | '(handle end-scroll))))) | |
4824 | (setq mouse-autoselect-window-state nil) | |
4825 | (when (timerp mouse-autoselect-window-timer) | |
4826 | (cancel-timer mouse-autoselect-window-timer)) | |
4827 | (remove-hook 'pre-command-hook 'mouse-autoselect-window-cancel))) | |
4828 | ||
4829 | (defun mouse-autoselect-window-start (mouse-position &optional window suspend) | |
4830 | "Start delayed window autoselection. | |
4831 | MOUSE-POSITION is the last position where the mouse was seen as returned | |
4832 | by `mouse-position'. Optional argument WINDOW non-nil denotes the | |
4833 | window where the mouse was seen. Optional argument SUSPEND non-nil | |
4834 | means suspend autoselection." | |
4835 | ;; Record values for MOUSE-POSITION, WINDOW, and SUSPEND. | |
4836 | (setq mouse-autoselect-window-position mouse-position) | |
4837 | (when window (setq mouse-autoselect-window-window window)) | |
4838 | (setq mouse-autoselect-window-state (when suspend 'suspend)) | |
4839 | ;; Install timer which runs `mouse-autoselect-window-select' after | |
4840 | ;; `mouse-autoselect-window' seconds. | |
4841 | (setq mouse-autoselect-window-timer | |
4842 | (run-at-time | |
4843 | (abs mouse-autoselect-window) nil 'mouse-autoselect-window-select))) | |
4844 | ||
4845 | (defun mouse-autoselect-window-select () | |
4846 | "Select window with delayed window autoselection. | |
4847 | If the mouse position has stabilized in a non-selected window, select | |
4848 | that window. The minibuffer window is selected only if the minibuffer is | |
4849 | active. This function is run by `mouse-autoselect-window-timer'." | |
6198ccd0 MR |
4850 | (ignore-errors |
4851 | (let* ((mouse-position (mouse-position)) | |
4852 | (window | |
4853 | (ignore-errors | |
4854 | (window-at (cadr mouse-position) (cddr mouse-position) | |
4855 | (car mouse-position))))) | |
4856 | (cond | |
4857 | ((or (menu-or-popup-active-p) | |
4858 | (and window | |
4859 | (not (coordinates-in-window-p (cdr mouse-position) window)))) | |
4860 | ;; A menu / popup dialog is active or the mouse is on the scroll-bar | |
4861 | ;; of WINDOW, temporarily suspend delayed autoselection. | |
4862 | (mouse-autoselect-window-start mouse-position nil t)) | |
4863 | ((eq mouse-autoselect-window-state 'suspend) | |
4864 | ;; Delayed autoselection was temporarily suspended, reenable it. | |
4865 | (mouse-autoselect-window-start mouse-position)) | |
4866 | ((and window (not (eq window (selected-window))) | |
4867 | (or (not (numberp mouse-autoselect-window)) | |
4868 | (and (> mouse-autoselect-window 0) | |
4869 | ;; If `mouse-autoselect-window' is positive, select | |
4870 | ;; window if the window is the same as before. | |
4871 | (eq window mouse-autoselect-window-window)) | |
4872 | ;; Otherwise select window if the mouse is at the same | |
4873 | ;; position as before. Observe that the first test after | |
4874 | ;; starting autoselection usually fails since the value of | |
4875 | ;; `mouse-autoselect-window-position' recorded there is the | |
4876 | ;; position where the mouse has entered the new window and | |
4877 | ;; not necessarily where the mouse has stopped moving. | |
4878 | (equal mouse-position mouse-autoselect-window-position)) | |
4879 | ;; The minibuffer is a candidate window if it's active. | |
4880 | (or (not (window-minibuffer-p window)) | |
4881 | (eq window (active-minibuffer-window)))) | |
4882 | ;; Mouse position has stabilized in non-selected window: Cancel | |
4883 | ;; delayed autoselection and try to select that window. | |
4884 | (mouse-autoselect-window-cancel t) | |
4885 | ;; Select window where mouse appears unless the selected window is the | |
4886 | ;; minibuffer. Use `unread-command-events' in order to execute pre- | |
4887 | ;; and post-command hooks and trigger idle timers. To avoid delaying | |
4888 | ;; autoselection again, set `mouse-autoselect-window-state'." | |
4889 | (unless (window-minibuffer-p (selected-window)) | |
4890 | (setq mouse-autoselect-window-state 'select) | |
4891 | (setq unread-command-events | |
4892 | (cons (list 'select-window (list window)) | |
4893 | unread-command-events)))) | |
4894 | ((or (and window (eq window (selected-window))) | |
4895 | (not (numberp mouse-autoselect-window)) | |
4896 | (equal mouse-position mouse-autoselect-window-position)) | |
4897 | ;; Mouse position has either stabilized in the selected window or at | |
4898 | ;; `mouse-autoselect-window-position': Cancel delayed autoselection. | |
4899 | (mouse-autoselect-window-cancel t)) | |
4900 | (t | |
4901 | ;; Mouse position has not stabilized yet, resume delayed | |
4902 | ;; autoselection. | |
4903 | (mouse-autoselect-window-start mouse-position window)))))) | |
3c448ab6 MR |
4904 | |
4905 | (defun handle-select-window (event) | |
4906 | "Handle select-window events." | |
4907 | (interactive "e") | |
4908 | (let ((window (posn-window (event-start event)))) | |
4909 | (unless (or (not (window-live-p window)) | |
4910 | ;; Don't switch if we're currently in the minibuffer. | |
4911 | ;; This tries to work around problems where the | |
4912 | ;; minibuffer gets unselected unexpectedly, and where | |
4913 | ;; you then have to move your mouse all the way down to | |
4914 | ;; the minibuffer to select it. | |
4915 | (window-minibuffer-p (selected-window)) | |
4916 | ;; Don't switch to minibuffer window unless it's active. | |
4917 | (and (window-minibuffer-p window) | |
4918 | (not (minibuffer-window-active-p window))) | |
4919 | ;; Don't switch when autoselection shall be delayed. | |
4920 | (and (numberp mouse-autoselect-window) | |
4921 | (not (zerop mouse-autoselect-window)) | |
4922 | (not (eq mouse-autoselect-window-state 'select)) | |
4923 | (progn | |
4924 | ;; Cancel any delayed autoselection. | |
4925 | (mouse-autoselect-window-cancel t) | |
4926 | ;; Start delayed autoselection from current mouse | |
4927 | ;; position and window. | |
4928 | (mouse-autoselect-window-start (mouse-position) window) | |
4929 | ;; Executing a command cancels delayed autoselection. | |
4930 | (add-hook | |
4931 | 'pre-command-hook 'mouse-autoselect-window-cancel)))) | |
4932 | (when mouse-autoselect-window | |
4933 | ;; Reset state of delayed autoselection. | |
4934 | (setq mouse-autoselect-window-state nil) | |
4935 | ;; Run `mouse-leave-buffer-hook' when autoselecting window. | |
4936 | (run-hooks 'mouse-leave-buffer-hook)) | |
4937 | (select-window window)))) | |
4938 | ||
3c448ab6 MR |
4939 | (defun truncated-partial-width-window-p (&optional window) |
4940 | "Return non-nil if lines in WINDOW are specifically truncated due to its width. | |
4941 | WINDOW defaults to the selected window. | |
4942 | Return nil if WINDOW is not a partial-width window | |
4943 | (regardless of the value of `truncate-lines'). | |
4944 | Otherwise, consult the value of `truncate-partial-width-windows' | |
4945 | for the buffer shown in WINDOW." | |
4946 | (unless window | |
4947 | (setq window (selected-window))) | |
4948 | (unless (window-full-width-p window) | |
4949 | (let ((t-p-w-w (buffer-local-value 'truncate-partial-width-windows | |
4950 | (window-buffer window)))) | |
4951 | (if (integerp t-p-w-w) | |
4952 | (< (window-width window) t-p-w-w) | |
4953 | t-p-w-w)))) | |
562dd5e9 MR |
4954 | \f |
4955 | (define-key ctl-x-map "0" 'delete-window) | |
4956 | (define-key ctl-x-map "1" 'delete-other-windows) | |
4957 | (define-key ctl-x-map "2" 'split-window-above-each-other) | |
4958 | (define-key ctl-x-map "3" 'split-window-side-by-side) | |
9397e56f | 4959 | (define-key ctl-x-map "o" 'other-window) |
562dd5e9 | 4960 | (define-key ctl-x-map "^" 'enlarge-window) |
3c448ab6 MR |
4961 | (define-key ctl-x-map "}" 'enlarge-window-horizontally) |
4962 | (define-key ctl-x-map "{" 'shrink-window-horizontally) | |
4963 | (define-key ctl-x-map "-" 'shrink-window-if-larger-than-buffer) | |
4964 | (define-key ctl-x-map "+" 'balance-windows) | |
4965 | (define-key ctl-x-4-map "0" 'kill-buffer-and-window) | |
4966 | ||
3c448ab6 | 4967 | ;;; window.el ends here |