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3c448ab6 MR |
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 | ||
d68443dc MR |
66 | ;; The following two functions are like `window-next-sibling' and |
67 | ;; `window-prev-sibling' but the WINDOW argument is _not_ optional (so | |
68 | ;; they don't substitute the selected window for nil), and they return | |
69 | ;; nil when WINDOW doesn't have a parent (like a frame's root window or | |
70 | ;; a minibuffer window). | |
85cc1f11 MR |
71 | (defsubst window-right (window) |
72 | "Return WINDOW's right sibling. | |
73 | Return nil if WINDOW is the root window of its frame. WINDOW can | |
74 | be any window." | |
d68443dc | 75 | (and window (window-parent window) (window-next-sibling window))) |
85cc1f11 MR |
76 | |
77 | (defsubst window-left (window) | |
78 | "Return WINDOW's left sibling. | |
79 | Return nil if WINDOW is the root window of its frame. WINDOW can | |
80 | be any window." | |
d68443dc | 81 | (and window (window-parent window) (window-prev-sibling window))) |
85cc1f11 MR |
82 | |
83 | (defsubst window-child (window) | |
84 | "Return WINDOW's first child window." | |
d68443dc | 85 | (or (window-top-child window) (window-left-child window))) |
85cc1f11 MR |
86 | |
87 | (defun window-child-count (window) | |
88 | "Return number of WINDOW's child windows." | |
89 | (let ((count 0)) | |
90 | (when (and (windowp window) (setq window (window-child window))) | |
91 | (while window | |
92 | (setq count (1+ count)) | |
d68443dc | 93 | (setq window (window-next-sibling window)))) |
85cc1f11 MR |
94 | count)) |
95 | ||
96 | (defun window-last-child (window) | |
97 | "Return last child window of WINDOW." | |
98 | (when (and (windowp window) (setq window (window-child window))) | |
d68443dc MR |
99 | (while (window-next-sibling window) |
100 | (setq window (window-next-sibling window)))) | |
85cc1f11 MR |
101 | window) |
102 | ||
24300f5f CY |
103 | (defsubst window-valid-p (object) |
104 | "Return t if OBJECT denotes a live window or internal window. | |
105 | Otherwise, return nil; this includes the case where OBJECT is a | |
106 | deleted window." | |
85cc1f11 MR |
107 | (and (windowp object) |
108 | (or (window-buffer object) (window-child object)) | |
109 | t)) | |
110 | ||
5386012d | 111 | (defsubst window-normalize-buffer (buffer-or-name) |
85cc1f11 MR |
112 | "Return buffer specified by BUFFER-OR-NAME. |
113 | BUFFER-OR-NAME must be either a buffer or a string naming a live | |
114 | buffer and defaults to the current buffer." | |
115 | (cond | |
116 | ((not buffer-or-name) | |
117 | (current-buffer)) | |
118 | ((bufferp buffer-or-name) | |
119 | (if (buffer-live-p buffer-or-name) | |
120 | buffer-or-name | |
121 | (error "Buffer %s is not a live buffer" buffer-or-name))) | |
122 | ((get-buffer buffer-or-name)) | |
123 | (t | |
124 | (error "No such buffer %s" buffer-or-name)))) | |
125 | ||
5386012d | 126 | (defsubst window-normalize-frame (frame) |
85cc1f11 MR |
127 | "Return frame specified by FRAME. |
128 | FRAME must be a live frame and defaults to the selected frame." | |
129 | (if frame | |
130 | (if (frame-live-p frame) | |
131 | frame | |
132 | (error "%s is not a live frame" frame)) | |
133 | (selected-frame))) | |
134 | ||
5386012d | 135 | (defsubst window-normalize-any-window (window) |
85cc1f11 MR |
136 | "Return window specified by WINDOW. |
137 | WINDOW must be a window that has not been deleted and defaults to | |
138 | the selected window." | |
139 | (if window | |
24300f5f | 140 | (if (window-valid-p window) |
85cc1f11 MR |
141 | window |
142 | (error "%s is not a window" window)) | |
143 | (selected-window))) | |
144 | ||
5386012d | 145 | (defsubst window-normalize-live-window (window) |
85cc1f11 MR |
146 | "Return live window specified by WINDOW. |
147 | WINDOW must be a live window and defaults to the selected one." | |
148 | (if window | |
149 | (if (and (windowp window) (window-buffer window)) | |
150 | window | |
151 | (error "%s is not a live window" window)) | |
152 | (selected-window))) | |
153 | ||
154 | (defvar ignore-window-parameters nil | |
155 | "If non-nil, standard functions ignore window parameters. | |
156 | The functions currently affected by this are `split-window', | |
157 | `delete-window', `delete-other-windows' and `other-window'. | |
158 | ||
159 | An application may bind this to a non-nil value around calls to | |
160 | these functions to inhibit processing of window parameters.") | |
161 | ||
a1511caf | 162 | (defconst window-safe-min-height 1 |
8da11505 | 163 | "The absolute minimum number of lines of a window. |
a1511caf MR |
164 | Anything less might crash Emacs.") |
165 | ||
562dd5e9 MR |
166 | (defcustom window-min-height 4 |
167 | "The minimum number of lines of any window. | |
9173deec JB |
168 | The value has to accommodate a mode- or header-line if present. |
169 | A value less than `window-safe-min-height' is ignored. The value | |
562dd5e9 MR |
170 | of this variable is honored when windows are resized or split. |
171 | ||
172 | Applications should never rebind this variable. To resize a | |
173 | window to a height less than the one specified here, an | |
d615d6d2 | 174 | application should instead call `window-resize' with a non-nil |
562dd5e9 MR |
175 | IGNORE argument. In order to have `split-window' make a window |
176 | shorter, explictly specify the SIZE argument of that function." | |
177 | :type 'integer | |
178 | :version "24.1" | |
179 | :group 'windows) | |
180 | ||
a1511caf | 181 | (defconst window-safe-min-width 2 |
8da11505 | 182 | "The absolute minimum number of columns of a window. |
a1511caf MR |
183 | Anything less might crash Emacs.") |
184 | ||
562dd5e9 MR |
185 | (defcustom window-min-width 10 |
186 | "The minimum number of columns of any window. | |
a91adc7e | 187 | The value has to accommodate margins, fringes, or scrollbars if |
562dd5e9 MR |
188 | present. A value less than `window-safe-min-width' is ignored. |
189 | The value of this variable is honored when windows are resized or | |
190 | split. | |
191 | ||
192 | Applications should never rebind this variable. To resize a | |
193 | window to a width less than the one specified here, an | |
d615d6d2 | 194 | application should instead call `window-resize' with a non-nil |
562dd5e9 MR |
195 | IGNORE argument. In order to have `split-window' make a window |
196 | narrower, explictly specify the SIZE argument of that function." | |
197 | :type 'integer | |
198 | :version "24.1" | |
199 | :group 'windows) | |
200 | ||
3d8daefe | 201 | (defun window-combination-p (&optional window horizontal) |
85cc1f11 MR |
202 | "If WINDOW is a vertical combination return WINDOW's first child. |
203 | WINDOW can be any window and defaults to the selected one. | |
204 | Optional argument HORIZONTAL non-nil means return WINDOW's first | |
205 | child if WINDOW is a horizontal combination." | |
5386012d | 206 | (setq window (window-normalize-any-window window)) |
85cc1f11 | 207 | (if horizontal |
d68443dc MR |
208 | (window-left-child window) |
209 | (window-top-child window))) | |
85cc1f11 | 210 | |
3d8daefe | 211 | (defsubst window-combined-p (&optional window horizontal) |
85cc1f11 MR |
212 | "Return non-nil if and only if WINDOW is vertically combined. |
213 | WINDOW can be any window and defaults to the selected one. | |
214 | Optional argument HORIZONTAL non-nil means return non-nil if and | |
215 | only if WINDOW is horizontally combined." | |
5386012d | 216 | (setq window (window-normalize-any-window window)) |
85cc1f11 | 217 | (let ((parent (window-parent window))) |
3d8daefe | 218 | (and parent (window-combination-p parent horizontal)))) |
85cc1f11 | 219 | |
3d8daefe | 220 | (defun window-combinations (&optional window horizontal) |
85cc1f11 MR |
221 | "Return largest number of vertically arranged subwindows of WINDOW. |
222 | WINDOW can be any window and defaults to the selected one. | |
223 | Optional argument HORIZONTAL non-nil means to return the largest | |
224 | number of horizontally arranged subwindows of WINDOW." | |
5386012d | 225 | (setq window (window-normalize-any-window window)) |
85cc1f11 MR |
226 | (cond |
227 | ((window-live-p window) | |
228 | ;; If WINDOW is live, return 1. | |
229 | 1) | |
3d8daefe | 230 | ((window-combination-p window horizontal) |
85cc1f11 MR |
231 | ;; If WINDOW is iso-combined, return the sum of the values for all |
232 | ;; subwindows of WINDOW. | |
233 | (let ((child (window-child window)) | |
234 | (count 0)) | |
235 | (while child | |
236 | (setq count | |
3d8daefe | 237 | (+ (window-combinations child horizontal) |
85cc1f11 MR |
238 | count)) |
239 | (setq child (window-right child))) | |
240 | count)) | |
241 | (t | |
242 | ;; If WINDOW is not iso-combined, return the maximum value of any | |
243 | ;; subwindow of WINDOW. | |
244 | (let ((child (window-child window)) | |
245 | (count 1)) | |
246 | (while child | |
247 | (setq count | |
3d8daefe | 248 | (max (window-combinations child horizontal) |
85cc1f11 MR |
249 | count)) |
250 | (setq child (window-right child))) | |
251 | count)))) | |
252 | ||
253 | (defun walk-window-tree-1 (proc walk-window-tree-window any &optional sub-only) | |
254 | "Helper function for `walk-window-tree' and `walk-window-subtree'." | |
255 | (let (walk-window-tree-buffer) | |
256 | (while walk-window-tree-window | |
257 | (setq walk-window-tree-buffer | |
258 | (window-buffer walk-window-tree-window)) | |
259 | (when (or walk-window-tree-buffer any) | |
260 | (funcall proc walk-window-tree-window)) | |
261 | (unless walk-window-tree-buffer | |
262 | (walk-window-tree-1 | |
d68443dc | 263 | proc (window-left-child walk-window-tree-window) any) |
85cc1f11 | 264 | (walk-window-tree-1 |
d68443dc | 265 | proc (window-top-child walk-window-tree-window) any)) |
85cc1f11 MR |
266 | (if sub-only |
267 | (setq walk-window-tree-window nil) | |
268 | (setq walk-window-tree-window | |
269 | (window-right walk-window-tree-window)))))) | |
270 | ||
271 | (defun walk-window-tree (proc &optional frame any) | |
272 | "Run function PROC on each live window of FRAME. | |
273 | PROC must be a function with one argument - a window. FRAME must | |
274 | be a live frame and defaults to the selected one. ANY, if | |
275 | non-nil means to run PROC on all live and internal windows of | |
276 | FRAME. | |
277 | ||
278 | This function performs a pre-order, depth-first traversal of the | |
279 | window tree. If PROC changes the window tree, the result is | |
280 | unpredictable." | |
5386012d | 281 | (let ((walk-window-tree-frame (window-normalize-frame frame))) |
85cc1f11 MR |
282 | (walk-window-tree-1 |
283 | proc (frame-root-window walk-window-tree-frame) any))) | |
284 | ||
285 | (defun walk-window-subtree (proc &optional window any) | |
286 | "Run function PROC on each live subwindow of WINDOW. | |
287 | WINDOW defaults to the selected window. PROC must be a function | |
288 | with one argument - a window. ANY, if non-nil means to run PROC | |
289 | on all live and internal subwindows of WINDOW. | |
290 | ||
291 | This function performs a pre-order, depth-first traversal of the | |
292 | window tree rooted at WINDOW. If PROC changes that window tree, | |
293 | the result is unpredictable." | |
5386012d | 294 | (setq window (window-normalize-any-window window)) |
85cc1f11 MR |
295 | (walk-window-tree-1 proc window any t)) |
296 | ||
297 | (defun windows-with-parameter (parameter &optional value frame any values) | |
298 | "Return a list of all windows on FRAME with PARAMETER non-nil. | |
299 | FRAME defaults to the selected frame. Optional argument VALUE | |
300 | non-nil means only return windows whose window-parameter value of | |
301 | PARAMETER equals VALUE \(comparison is done using `equal'). | |
302 | Optional argument ANY non-nil means consider internal windows | |
303 | too. Optional argument VALUES non-nil means return a list of cons | |
304 | cells whose car is the value of the parameter and whose cdr is | |
305 | the window." | |
306 | (let (this-value windows) | |
307 | (walk-window-tree | |
308 | (lambda (window) | |
309 | (when (and (setq this-value (window-parameter window parameter)) | |
310 | (or (not value) (or (equal value this-value)))) | |
311 | (setq windows | |
312 | (if values | |
313 | (cons (cons this-value window) windows) | |
314 | (cons window windows))))) | |
315 | frame any) | |
316 | ||
317 | (nreverse windows))) | |
318 | ||
319 | (defun window-with-parameter (parameter &optional value frame any) | |
320 | "Return first window on FRAME with PARAMETER non-nil. | |
321 | FRAME defaults to the selected frame. Optional argument VALUE | |
322 | non-nil means only return a window whose window-parameter value | |
323 | for PARAMETER equals VALUE \(comparison is done with `equal'). | |
324 | Optional argument ANY non-nil means consider internal windows | |
325 | too." | |
326 | (let (this-value windows) | |
327 | (catch 'found | |
328 | (walk-window-tree | |
329 | (lambda (window) | |
330 | (when (and (setq this-value (window-parameter window parameter)) | |
331 | (or (not value) (equal value this-value))) | |
332 | (throw 'found window))) | |
333 | frame any)))) | |
334 | ||
335 | ;;; Atomic windows. | |
336 | (defun window-atom-root (&optional window) | |
337 | "Return root of atomic window WINDOW is a part of. | |
338 | WINDOW can be any window and defaults to the selected one. | |
339 | Return nil if WINDOW is not part of a atomic window." | |
5386012d | 340 | (setq window (window-normalize-any-window window)) |
85cc1f11 MR |
341 | (let (root) |
342 | (while (and window (window-parameter window 'window-atom)) | |
343 | (setq root window) | |
344 | (setq window (window-parent window))) | |
345 | root)) | |
346 | ||
5386012d | 347 | (defun window-make-atom (window) |
85cc1f11 MR |
348 | "Make WINDOW an atomic window. |
349 | WINDOW must be an internal window. Return WINDOW." | |
350 | (if (not (window-child window)) | |
351 | (error "Window %s is not an internal window" window) | |
352 | (walk-window-subtree | |
353 | (lambda (window) | |
354 | (set-window-parameter window 'window-atom t)) | |
355 | window t) | |
356 | window)) | |
357 | ||
358 | (defun window-atom-check-1 (window) | |
359 | "Subroutine of `window-atom-check'." | |
360 | (when window | |
361 | (if (window-parameter window 'window-atom) | |
362 | (let ((count 0)) | |
363 | (when (or (catch 'reset | |
364 | (walk-window-subtree | |
365 | (lambda (window) | |
366 | (if (window-parameter window 'window-atom) | |
367 | (setq count (1+ count)) | |
368 | (throw 'reset t))) | |
369 | window t)) | |
370 | ;; count >= 1 must hold here. If there's no other | |
371 | ;; window around dissolve this atomic window. | |
372 | (= count 1)) | |
373 | ;; Dissolve atomic window. | |
374 | (walk-window-subtree | |
375 | (lambda (window) | |
376 | (set-window-parameter window 'window-atom nil)) | |
377 | window t))) | |
378 | ;; Check children. | |
379 | (unless (window-buffer window) | |
d68443dc MR |
380 | (window-atom-check-1 (window-left-child window)) |
381 | (window-atom-check-1 (window-top-child window)))) | |
85cc1f11 MR |
382 | ;; Check right sibling |
383 | (window-atom-check-1 (window-right window)))) | |
384 | ||
385 | (defun window-atom-check (&optional frame) | |
386 | "Check atomicity of all windows on FRAME. | |
387 | FRAME defaults to the selected frame. If an atomic window is | |
388 | wrongly configured, reset the atomicity of all its subwindows to | |
389 | nil. An atomic window is wrongly configured if it has no | |
390 | subwindows or one of its subwindows is not atomic." | |
391 | (window-atom-check-1 (frame-root-window frame))) | |
392 | ||
393 | ;; Side windows. | |
394 | (defvar window-sides '(left top right bottom) | |
395 | "Window sides.") | |
396 | ||
397 | (defcustom window-sides-vertical nil | |
398 | "If non-nil, left and right side windows are full height. | |
399 | Otherwise, top and bottom side windows are full width." | |
400 | :type 'boolean | |
401 | :group 'windows | |
402 | :version "24.1") | |
403 | ||
404 | (defcustom window-sides-slots '(nil nil nil nil) | |
405 | "Maximum number of side window slots. | |
406 | The value is a list of four elements specifying the number of | |
407 | side window slots on \(in this order) the left, top, right and | |
408 | bottom side of each frame. If an element is a number, this means | |
409 | to display at most that many side windows on the corresponding | |
410 | side. If an element is nil, this means there's no bound on the | |
411 | number of slots on that side." | |
412 | :risky t | |
413 | :type | |
414 | '(list | |
415 | :value (nil nil nil nil) | |
416 | (choice | |
417 | :tag "Left" | |
418 | :help-echo "Maximum slots of left side window." | |
419 | :value nil | |
420 | :format "%[Left%] %v\n" | |
421 | (const :tag "Unlimited" :format "%t" nil) | |
422 | (integer :tag "Number" :value 2 :size 5)) | |
423 | (choice | |
424 | :tag "Top" | |
425 | :help-echo "Maximum slots of top side window." | |
426 | :value nil | |
427 | :format "%[Top%] %v\n" | |
428 | (const :tag "Unlimited" :format "%t" nil) | |
429 | (integer :tag "Number" :value 3 :size 5)) | |
430 | (choice | |
431 | :tag "Right" | |
432 | :help-echo "Maximum slots of right side window." | |
433 | :value nil | |
434 | :format "%[Right%] %v\n" | |
435 | (const :tag "Unlimited" :format "%t" nil) | |
436 | (integer :tag "Number" :value 2 :size 5)) | |
437 | (choice | |
438 | :tag "Bottom" | |
439 | :help-echo "Maximum slots of bottom side window." | |
440 | :value nil | |
441 | :format "%[Bottom%] %v\n" | |
442 | (const :tag "Unlimited" :format "%t" nil) | |
443 | (integer :tag "Number" :value 3 :size 5))) | |
444 | :group 'windows) | |
445 | ||
446 | (defun window-side-check (&optional frame) | |
447 | "Check the window-side parameter of all windows on FRAME. | |
448 | FRAME defaults to the selected frame. If the configuration is | |
449 | invalid, reset all window-side parameters to nil. | |
450 | ||
451 | A valid configuration has to preserve the following invariant: | |
452 | ||
453 | - If a window has a non-nil window-side parameter, it must have a | |
454 | parent window and the parent window's window-side parameter | |
455 | must be either nil or the same as for window. | |
456 | ||
457 | - If windows with non-nil window-side parameters exist, there | |
458 | must be at most one window of each side and non-side with a | |
459 | parent whose window-side parameter is nil and there must be no | |
460 | leaf window whose window-side parameter is nil." | |
461 | (let (normal none left top right bottom | |
462 | side parent parent-side code) | |
463 | (when (or (catch 'reset | |
464 | (walk-window-tree | |
465 | (lambda (window) | |
466 | (setq side (window-parameter window 'window-side)) | |
467 | (setq parent (window-parent window)) | |
468 | (setq parent-side | |
469 | (and parent (window-parameter parent 'window-side))) | |
470 | ;; The following `cond' seems a bit tedious, but I'd | |
471 | ;; rather stick to using just the stack. | |
472 | (cond | |
473 | (parent-side | |
474 | (when (not (eq parent-side side)) | |
475 | ;; A parent whose window-side is non-nil must | |
476 | ;; have a child with the same window-side. | |
477 | (throw 'reset t))) | |
478 | ;; Now check that there's more than one main window | |
479 | ;; for any of none, left, top, right and bottom. | |
480 | ((eq side 'none) | |
481 | (if none | |
482 | (throw 'reset t) | |
483 | (setq none t))) | |
484 | ((eq side 'left) | |
485 | (if left | |
486 | (throw 'reset t) | |
487 | (setq left t))) | |
488 | ((eq side 'top) | |
489 | (if top | |
490 | (throw 'reset t) | |
491 | (setq top t))) | |
492 | ((eq side 'right) | |
493 | (if right | |
494 | (throw 'reset t) | |
495 | (setq right t))) | |
496 | ((eq side 'bottom) | |
497 | (if bottom | |
498 | (throw 'reset t) | |
499 | (setq bottom t))) | |
500 | ((window-buffer window) | |
501 | ;; A leaf window without window-side parameter, | |
502 | ;; record its existence. | |
503 | (setq normal t)))) | |
504 | frame t)) | |
505 | (if none | |
506 | ;; At least one non-side window exists, so there must | |
507 | ;; be at least one side-window and no normal window. | |
508 | (or (not (or left top right bottom)) normal) | |
509 | ;; No non-side window exists, so there must be no side | |
510 | ;; window either. | |
511 | (or left top right bottom))) | |
512 | (walk-window-tree | |
513 | (lambda (window) | |
514 | (set-window-parameter window 'window-side nil)) | |
515 | frame t)))) | |
516 | ||
517 | (defun window-check (&optional frame) | |
518 | "Check atomic and side windows on FRAME. | |
519 | FRAME defaults to the selected frame." | |
520 | (window-side-check frame) | |
521 | (window-atom-check frame)) | |
522 | ||
523 | ;;; Window sizes. | |
524 | (defvar window-size-fixed nil | |
525 | "Non-nil in a buffer means windows displaying the buffer are fixed-size. | |
526 | If the value is `height', then only the window's height is fixed. | |
527 | If the value is `width', then only the window's width is fixed. | |
528 | Any other non-nil value fixes both the width and the height. | |
529 | ||
530 | Emacs won't change the size of any window displaying that buffer, | |
531 | unless it has no other choice \(like when deleting a neighboring | |
532 | window).") | |
533 | (make-variable-buffer-local 'window-size-fixed) | |
534 | ||
a1511caf MR |
535 | (defsubst window-size-ignore (window ignore) |
536 | "Return non-nil if IGNORE says to ignore size restrictions for WINDOW." | |
24300f5f | 537 | (if (window-valid-p ignore) (eq window ignore) ignore)) |
a1511caf MR |
538 | |
539 | (defun window-min-size (&optional window horizontal ignore) | |
540 | "Return the minimum number of lines of WINDOW. | |
541 | WINDOW can be an arbitrary window and defaults to the selected | |
542 | one. Optional argument HORIZONTAL non-nil means return the | |
543 | minimum number of columns of WINDOW. | |
544 | ||
545 | Optional argument IGNORE non-nil means ignore any restrictions | |
546 | imposed by fixed size windows, `window-min-height' or | |
547 | `window-min-width' settings. IGNORE equal `safe' means live | |
548 | windows may get as small as `window-safe-min-height' lines and | |
549 | `window-safe-min-width' columns. IGNORE a window means ignore | |
550 | restrictions for that window only." | |
551 | (window-min-size-1 | |
5386012d | 552 | (window-normalize-any-window window) horizontal ignore)) |
a1511caf MR |
553 | |
554 | (defun window-min-size-1 (window horizontal ignore) | |
555 | "Internal function of `window-min-size'." | |
556 | (let ((sub (window-child window))) | |
557 | (if sub | |
558 | (let ((value 0)) | |
559 | ;; WINDOW is an internal window. | |
3d8daefe | 560 | (if (window-combined-p sub horizontal) |
a1511caf MR |
561 | ;; The minimum size of an iso-combination is the sum of |
562 | ;; the minimum sizes of its subwindows. | |
563 | (while sub | |
564 | (setq value (+ value | |
565 | (window-min-size-1 sub horizontal ignore))) | |
566 | (setq sub (window-right sub))) | |
567 | ;; The minimum size of an ortho-combination is the maximum of | |
568 | ;; the minimum sizes of its subwindows. | |
569 | (while sub | |
570 | (setq value (max value | |
571 | (window-min-size-1 sub horizontal ignore))) | |
572 | (setq sub (window-right sub)))) | |
573 | value) | |
574 | (with-current-buffer (window-buffer window) | |
575 | (cond | |
576 | ((and (not (window-size-ignore window ignore)) | |
577 | (window-size-fixed-p window horizontal)) | |
578 | ;; The minimum size of a fixed size window is its size. | |
579 | (window-total-size window horizontal)) | |
580 | ((or (eq ignore 'safe) (eq ignore window)) | |
581 | ;; If IGNORE equals `safe' or WINDOW return the safe values. | |
582 | (if horizontal window-safe-min-width window-safe-min-height)) | |
583 | (horizontal | |
584 | ;; For the minimum width of a window take fringes and | |
585 | ;; scroll-bars into account. This is questionable and should | |
586 | ;; be removed as soon as we are able to split (and resize) | |
587 | ;; windows such that the new (or resized) windows can get a | |
588 | ;; size less than the user-specified `window-min-height' and | |
589 | ;; `window-min-width'. | |
590 | (let ((frame (window-frame window)) | |
591 | (fringes (window-fringes window)) | |
592 | (scroll-bars (window-scroll-bars window))) | |
593 | (max | |
594 | (+ window-safe-min-width | |
595 | (ceiling (car fringes) (frame-char-width frame)) | |
596 | (ceiling (cadr fringes) (frame-char-width frame)) | |
597 | (cond | |
598 | ((memq (nth 2 scroll-bars) '(left right)) | |
599 | (nth 1 scroll-bars)) | |
600 | ((memq (frame-parameter frame 'vertical-scroll-bars) | |
601 | '(left right)) | |
602 | (ceiling (or (frame-parameter frame 'scroll-bar-width) 14) | |
603 | (frame-char-width))) | |
604 | (t 0))) | |
605 | (if (and (not (window-size-ignore window ignore)) | |
606 | (numberp window-min-width)) | |
607 | window-min-width | |
608 | 0)))) | |
609 | (t | |
610 | ;; For the minimum height of a window take any mode- or | |
611 | ;; header-line into account. | |
612 | (max (+ window-safe-min-height | |
613 | (if header-line-format 1 0) | |
614 | (if mode-line-format 1 0)) | |
615 | (if (and (not (window-size-ignore window ignore)) | |
616 | (numberp window-min-height)) | |
617 | window-min-height | |
618 | 0)))))))) | |
619 | ||
620 | (defun window-sizable (window delta &optional horizontal ignore) | |
621 | "Return DELTA if DELTA lines can be added to WINDOW. | |
622 | Optional argument HORIZONTAL non-nil means return DELTA if DELTA | |
623 | columns can be added to WINDOW. A return value of zero means | |
624 | that no lines (or columns) can be added to WINDOW. | |
625 | ||
626 | This function looks only at WINDOW and its subwindows. The | |
627 | function `window-resizable' looks at other windows as well. | |
628 | ||
629 | DELTA positive means WINDOW shall be enlarged by DELTA lines or | |
630 | columns. If WINDOW cannot be enlarged by DELTA lines or columns | |
631 | return the maximum value in the range 0..DELTA by which WINDOW | |
632 | can be enlarged. | |
633 | ||
634 | DELTA negative means WINDOW shall be shrunk by -DELTA lines or | |
635 | columns. If WINDOW cannot be shrunk by -DELTA lines or columns, | |
636 | return the minimum value in the range DELTA..0 by which WINDOW | |
637 | can be shrunk. | |
638 | ||
639 | Optional argument IGNORE non-nil means ignore any restrictions | |
640 | imposed by fixed size windows, `window-min-height' or | |
641 | `window-min-width' settings. IGNORE equal `safe' means live | |
642 | windows may get as small as `window-safe-min-height' lines and | |
643 | `window-safe-min-width' columns. IGNORE any window means ignore | |
644 | restrictions for that window only." | |
5386012d | 645 | (setq window (window-normalize-any-window window)) |
a1511caf MR |
646 | (cond |
647 | ((< delta 0) | |
648 | (max (- (window-min-size window horizontal ignore) | |
649 | (window-total-size window horizontal)) | |
650 | delta)) | |
651 | ((window-size-ignore window ignore) | |
652 | delta) | |
653 | ((> delta 0) | |
654 | (if (window-size-fixed-p window horizontal) | |
655 | 0 | |
656 | delta)) | |
657 | (t 0))) | |
658 | ||
659 | (defsubst window-sizable-p (window delta &optional horizontal ignore) | |
660 | "Return t if WINDOW can be resized by DELTA lines. | |
661 | For the meaning of the arguments of this function see the | |
662 | doc-string of `window-sizable'." | |
5386012d | 663 | (setq window (window-normalize-any-window window)) |
a1511caf MR |
664 | (if (> delta 0) |
665 | (>= (window-sizable window delta horizontal ignore) delta) | |
666 | (<= (window-sizable window delta horizontal ignore) delta))) | |
667 | ||
668 | (defun window-size-fixed-1 (window horizontal) | |
669 | "Internal function for `window-size-fixed-p'." | |
670 | (let ((sub (window-child window))) | |
671 | (catch 'fixed | |
672 | (if sub | |
673 | ;; WINDOW is an internal window. | |
3d8daefe | 674 | (if (window-combined-p sub horizontal) |
a1511caf MR |
675 | ;; An iso-combination is fixed size if all its subwindows |
676 | ;; are fixed-size. | |
677 | (progn | |
678 | (while sub | |
679 | (unless (window-size-fixed-1 sub horizontal) | |
680 | ;; We found a non-fixed-size subwindow, so WINDOW's | |
681 | ;; size is not fixed. | |
682 | (throw 'fixed nil)) | |
683 | (setq sub (window-right sub))) | |
684 | ;; All subwindows are fixed-size, so WINDOW's size is | |
685 | ;; fixed. | |
686 | (throw 'fixed t)) | |
687 | ;; An ortho-combination is fixed-size if at least one of its | |
688 | ;; subwindows is fixed-size. | |
689 | (while sub | |
690 | (when (window-size-fixed-1 sub horizontal) | |
691 | ;; We found a fixed-size subwindow, so WINDOW's size is | |
692 | ;; fixed. | |
693 | (throw 'fixed t)) | |
694 | (setq sub (window-right sub)))) | |
695 | ;; WINDOW is a live window. | |
696 | (with-current-buffer (window-buffer window) | |
697 | (if horizontal | |
698 | (memq window-size-fixed '(width t)) | |
699 | (memq window-size-fixed '(height t)))))))) | |
700 | ||
701 | (defun window-size-fixed-p (&optional window horizontal) | |
702 | "Return non-nil if WINDOW's height is fixed. | |
703 | WINDOW can be an arbitrary window and defaults to the selected | |
704 | window. Optional argument HORIZONTAL non-nil means return | |
705 | non-nil if WINDOW's width is fixed. | |
706 | ||
707 | If this function returns nil, this does not necessarily mean that | |
708 | WINDOW can be resized in the desired direction. The functions | |
709 | `window-resizable' and `window-resizable-p' will tell that." | |
710 | (window-size-fixed-1 | |
5386012d | 711 | (window-normalize-any-window window) horizontal)) |
a1511caf MR |
712 | |
713 | (defun window-min-delta-1 (window delta &optional horizontal ignore trail noup) | |
714 | "Internal function for `window-min-delta'." | |
715 | (if (not (window-parent window)) | |
716 | ;; If we can't go up, return zero. | |
717 | 0 | |
718 | ;; Else try to find a non-fixed-size sibling of WINDOW. | |
719 | (let* ((parent (window-parent window)) | |
720 | (sub (window-child parent))) | |
721 | (catch 'done | |
3d8daefe | 722 | (if (window-combined-p sub horizontal) |
a1511caf MR |
723 | ;; In an iso-combination throw DELTA if we find at least one |
724 | ;; subwindow and that subwindow is either not of fixed-size | |
725 | ;; or we can ignore fixed-sizeness. | |
726 | (let ((skip (eq trail 'after))) | |
727 | (while sub | |
728 | (cond | |
729 | ((eq sub window) | |
730 | (setq skip (eq trail 'before))) | |
731 | (skip) | |
732 | ((and (not (window-size-ignore window ignore)) | |
733 | (window-size-fixed-p sub horizontal))) | |
734 | (t | |
735 | ;; We found a non-fixed-size subwindow. | |
736 | (throw 'done delta))) | |
737 | (setq sub (window-right sub)))) | |
738 | ;; In an ortho-combination set DELTA to the minimum value by | |
739 | ;; which other subwindows can shrink. | |
740 | (while sub | |
741 | (unless (eq sub window) | |
742 | (setq delta | |
743 | (min delta | |
744 | (- (window-total-size sub horizontal) | |
745 | (window-min-size sub horizontal ignore))))) | |
746 | (setq sub (window-right sub)))) | |
747 | (if noup | |
748 | delta | |
749 | (window-min-delta-1 parent delta horizontal ignore trail)))))) | |
750 | ||
751 | (defun window-min-delta (&optional window horizontal ignore trail noup nodown) | |
752 | "Return number of lines by which WINDOW can be shrunk. | |
753 | WINDOW can be an arbitrary window and defaults to the selected | |
754 | window. Return zero if WINDOW cannot be shrunk. | |
755 | ||
756 | Optional argument HORIZONTAL non-nil means return number of | |
757 | columns by which WINDOW can be shrunk. | |
758 | ||
759 | Optional argument IGNORE non-nil means ignore any restrictions | |
760 | imposed by fixed size windows, `window-min-height' or | |
761 | `window-min-width' settings. IGNORE a window means ignore | |
762 | restrictions for that window only. IGNORE equal `safe' means | |
763 | live windows may get as small as `window-safe-min-height' lines | |
764 | and `window-safe-min-width' columns. | |
765 | ||
766 | Optional argument TRAIL `before' means only windows to the left | |
767 | of or above WINDOW can be enlarged. Optional argument TRAIL | |
768 | `after' means only windows to the right of or below WINDOW can be | |
769 | enlarged. | |
770 | ||
771 | Optional argument NOUP non-nil means don't go up in the window | |
772 | tree but try to enlarge windows within WINDOW's combination only. | |
773 | ||
774 | Optional argument NODOWN non-nil means don't check whether WINDOW | |
775 | itself \(and its subwindows) can be shrunk; check only whether at | |
776 | least one other windows can be enlarged appropriately." | |
5386012d | 777 | (setq window (window-normalize-any-window window)) |
a1511caf MR |
778 | (let ((size (window-total-size window horizontal)) |
779 | (minimum (window-min-size window horizontal ignore))) | |
780 | (cond | |
781 | (nodown | |
782 | ;; If NODOWN is t, try to recover the entire size of WINDOW. | |
783 | (window-min-delta-1 window size horizontal ignore trail noup)) | |
784 | ((= size minimum) | |
785 | ;; If NODOWN is nil and WINDOW's size is already at its minimum, | |
786 | ;; there's nothing to recover. | |
787 | 0) | |
788 | (t | |
789 | ;; Otherwise, try to recover whatever WINDOW is larger than its | |
790 | ;; minimum size. | |
791 | (window-min-delta-1 | |
792 | window (- size minimum) horizontal ignore trail noup))))) | |
793 | ||
794 | (defun window-max-delta-1 (window delta &optional horizontal ignore trail noup) | |
795 | "Internal function of `window-max-delta'." | |
796 | (if (not (window-parent window)) | |
797 | ;; Can't go up. Return DELTA. | |
798 | delta | |
799 | (let* ((parent (window-parent window)) | |
800 | (sub (window-child parent))) | |
801 | (catch 'fixed | |
3d8daefe | 802 | (if (window-combined-p sub horizontal) |
a1511caf MR |
803 | ;; For an iso-combination calculate how much we can get from |
804 | ;; other subwindows. | |
805 | (let ((skip (eq trail 'after))) | |
806 | (while sub | |
807 | (cond | |
808 | ((eq sub window) | |
809 | (setq skip (eq trail 'before))) | |
810 | (skip) | |
811 | (t | |
812 | (setq delta | |
813 | (+ delta | |
814 | (- (window-total-size sub horizontal) | |
815 | (window-min-size sub horizontal ignore)))))) | |
816 | (setq sub (window-right sub)))) | |
817 | ;; For an ortho-combination throw DELTA when at least one | |
818 | ;; subwindow is fixed-size. | |
819 | (while sub | |
820 | (when (and (not (eq sub window)) | |
821 | (not (window-size-ignore sub ignore)) | |
822 | (window-size-fixed-p sub horizontal)) | |
823 | (throw 'fixed delta)) | |
824 | (setq sub (window-right sub)))) | |
825 | (if noup | |
826 | ;; When NOUP is nil, DELTA is all we can get. | |
827 | delta | |
828 | ;; Else try with parent of WINDOW, passing the DELTA we | |
829 | ;; recovered so far. | |
830 | (window-max-delta-1 parent delta horizontal ignore trail)))))) | |
831 | ||
832 | (defun window-max-delta (&optional window horizontal ignore trail noup nodown) | |
833 | "Return maximum number of lines WINDOW by which WINDOW can be enlarged. | |
834 | WINDOW can be an arbitrary window and defaults to the selected | |
835 | window. The return value is zero if WINDOW cannot be enlarged. | |
836 | ||
837 | Optional argument HORIZONTAL non-nil means return maximum number | |
838 | of columns by which WINDOW can be enlarged. | |
839 | ||
840 | Optional argument IGNORE non-nil means ignore any restrictions | |
841 | imposed by fixed size windows, `window-min-height' or | |
842 | `window-min-width' settings. IGNORE a window means ignore | |
843 | restrictions for that window only. IGNORE equal `safe' means | |
844 | live windows may get as small as `window-safe-min-height' lines | |
845 | and `window-safe-min-width' columns. | |
846 | ||
847 | Optional argument TRAIL `before' means only windows to the left | |
848 | of or below WINDOW can be shrunk. Optional argument TRAIL | |
849 | `after' means only windows to the right of or above WINDOW can be | |
850 | shrunk. | |
851 | ||
852 | Optional argument NOUP non-nil means don't go up in the window | |
853 | tree but try to obtain the entire space from windows within | |
854 | WINDOW's combination. | |
855 | ||
856 | Optional argument NODOWN non-nil means do not check whether | |
857 | WINDOW itself \(and its subwindows) can be enlarged; check only | |
858 | whether other windows can be shrunk appropriately." | |
5386012d | 859 | (setq window (window-normalize-any-window window)) |
a1511caf MR |
860 | (if (and (not (window-size-ignore window ignore)) |
861 | (not nodown) (window-size-fixed-p window horizontal)) | |
862 | ;; With IGNORE and NOWDON nil return zero if WINDOW has fixed | |
863 | ;; size. | |
864 | 0 | |
865 | ;; WINDOW has no fixed size. | |
866 | (window-max-delta-1 window 0 horizontal ignore trail noup))) | |
867 | ||
868 | ;; Make NOUP also inhibit the min-size check. | |
869 | (defun window-resizable (window delta &optional horizontal ignore trail noup nodown) | |
870 | "Return DELTA if WINDOW can be resized vertically by DELTA lines. | |
871 | Optional argument HORIZONTAL non-nil means return DELTA if WINDOW | |
872 | can be resized horizontally by DELTA columns. A return value of | |
873 | zero means that WINDOW is not resizable. | |
874 | ||
875 | DELTA positive means WINDOW shall be enlarged by DELTA lines or | |
876 | columns. If WINDOW cannot be enlarged by DELTA lines or columns | |
877 | return the maximum value in the range 0..DELTA by which WINDOW | |
878 | can be enlarged. | |
879 | ||
880 | DELTA negative means WINDOW shall be shrunk by -DELTA lines or | |
881 | columns. If WINDOW cannot be shrunk by -DELTA lines or columns, | |
882 | return the minimum value in the range DELTA..0 that can be used | |
883 | for shrinking WINDOW. | |
884 | ||
885 | Optional argument IGNORE non-nil means ignore any restrictions | |
886 | imposed by fixed size windows, `window-min-height' or | |
887 | `window-min-width' settings. IGNORE a window means ignore | |
888 | restrictions for that window only. IGNORE equal `safe' means | |
889 | live windows may get as small as `window-safe-min-height' lines | |
890 | and `window-safe-min-width' columns. | |
891 | ||
892 | Optional argument TRAIL `before' means only windows to the left | |
893 | of or below WINDOW can be shrunk. Optional argument TRAIL | |
894 | `after' means only windows to the right of or above WINDOW can be | |
895 | shrunk. | |
896 | ||
897 | Optional argument NOUP non-nil means don't go up in the window | |
898 | tree but try to distribute the space among the other windows | |
899 | within WINDOW's combination. | |
900 | ||
901 | Optional argument NODOWN non-nil means don't check whether WINDOW | |
902 | and its subwindows can be resized." | |
5386012d | 903 | (setq window (window-normalize-any-window window)) |
a1511caf MR |
904 | (cond |
905 | ((< delta 0) | |
906 | (max (- (window-min-delta window horizontal ignore trail noup nodown)) | |
907 | delta)) | |
908 | ((> delta 0) | |
909 | (min (window-max-delta window horizontal ignore trail noup nodown) | |
910 | delta)) | |
911 | (t 0))) | |
912 | ||
913 | (defun window-resizable-p (window delta &optional horizontal ignore trail noup nodown) | |
914 | "Return t if WINDOW can be resized vertically by DELTA lines. | |
915 | For the meaning of the arguments of this function see the | |
916 | doc-string of `window-resizable'." | |
5386012d | 917 | (setq window (window-normalize-any-window window)) |
a1511caf MR |
918 | (if (> delta 0) |
919 | (>= (window-resizable window delta horizontal ignore trail noup nodown) | |
920 | delta) | |
921 | (<= (window-resizable window delta horizontal ignore trail noup nodown) | |
922 | delta))) | |
923 | ||
924 | (defsubst window-total-height (&optional window) | |
925 | "Return the total number of lines of WINDOW. | |
926 | WINDOW can be any window and defaults to the selected one. The | |
927 | return value includes WINDOW's mode line and header line, if any. | |
928 | If WINDOW is internal the return value is the sum of the total | |
929 | number of lines of WINDOW's child windows if these are vertically | |
930 | combined and the height of WINDOW's first child otherwise. | |
931 | ||
932 | Note: This function does not take into account the value of | |
933 | `line-spacing' when calculating the number of lines in WINDOW." | |
934 | (window-total-size window)) | |
3c448ab6 | 935 | |
f3d1777e MR |
936 | ;; Eventually we should make `window-height' obsolete. |
937 | (defalias 'window-height 'window-total-height) | |
938 | ||
ccafbf06 | 939 | ;; See discussion in bug#4543. |
a1511caf MR |
940 | (defsubst window-full-height-p (&optional window) |
941 | "Return t if WINDOW is as high as the containing frame. | |
942 | More precisely, return t if and only if the total height of | |
943 | WINDOW equals the total height of the root window of WINDOW's | |
944 | frame. WINDOW can be any window and defaults to the selected | |
945 | one." | |
5386012d | 946 | (setq window (window-normalize-any-window window)) |
a1511caf MR |
947 | (= (window-total-size window) |
948 | (window-total-size (frame-root-window window)))) | |
949 | ||
950 | (defsubst window-total-width (&optional window) | |
951 | "Return the total number of columns of WINDOW. | |
952 | WINDOW can be any window and defaults to the selected one. The | |
953 | return value includes any vertical dividers or scrollbars of | |
954 | WINDOW. If WINDOW is internal, the return value is the sum of | |
955 | the total number of columns of WINDOW's child windows if these | |
956 | are horizontally combined and the width of WINDOW's first child | |
957 | otherwise." | |
958 | (window-total-size window t)) | |
959 | ||
960 | (defsubst window-full-width-p (&optional window) | |
961 | "Return t if WINDOW is as wide as the containing frame. | |
962 | More precisely, return t if and only if the total width of WINDOW | |
963 | equals the total width of the root window of WINDOW's frame. | |
964 | WINDOW can be any window and defaults to the selected one." | |
5386012d | 965 | (setq window (window-normalize-any-window window)) |
a1511caf MR |
966 | (= (window-total-size window t) |
967 | (window-total-size (frame-root-window window) t))) | |
968 | ||
969 | (defsubst window-body-height (&optional window) | |
970 | "Return the number of lines of WINDOW's body. | |
971 | WINDOW must be a live window and defaults to the selected one. | |
972 | ||
973 | The return value does not include WINDOW's mode line and header | |
974 | line, if any. If a line at the bottom of the window is only | |
975 | partially visible, that line is included in the return value. If | |
976 | you do not want to include a partially visible bottom line in the | |
89bd5ee1 EZ |
977 | return value, use `window-text-height' instead. |
978 | ||
979 | Note that the return value is measured in canonical units, i.e. for | |
980 | the default frame's face. If the window shows some characters with | |
981 | non-default face, e.g., if the font of some characters is larger or | |
982 | smaller than the default font, the value returned by this function | |
983 | will not match the actual number of lines shown in the window. To | |
984 | get the actual number of lines, use `posn-at-point'." | |
a1511caf MR |
985 | (window-body-size window)) |
986 | ||
987 | (defsubst window-body-width (&optional window) | |
988 | "Return the number of columns of WINDOW's body. | |
989 | WINDOW must be a live window and defaults to the selected one. | |
990 | ||
991 | The return value does not include any vertical dividers or scroll | |
992 | bars owned by WINDOW. On a window-system the return value does | |
993 | not include the number of columns used for WINDOW's fringes or | |
89bd5ee1 EZ |
994 | display margins either. |
995 | ||
996 | Note that the return value is measured in canonical units, i.e. for | |
997 | the default frame's face. If the window shows some characters with | |
998 | non-default face, e.g., if the font of some characters is larger or | |
999 | smaller than the default font, the value returned by this function | |
1000 | will not match the actual number of characters per line shown in the | |
1001 | window. To get the actual number of columns, use `posn-at-point'." | |
a1511caf | 1002 | (window-body-size window t)) |
02c6f098 | 1003 | |
f3d1777e MR |
1004 | ;; Eventually we should make `window-height' obsolete. |
1005 | (defalias 'window-width 'window-body-width) | |
1006 | ||
3c448ab6 MR |
1007 | (defun window-current-scroll-bars (&optional window) |
1008 | "Return the current scroll bar settings for WINDOW. | |
387522b2 | 1009 | WINDOW must be a live window and defaults to the selected one. |
3c448ab6 MR |
1010 | |
1011 | The return value is a cons cell (VERTICAL . HORIZONTAL) where | |
1012 | VERTICAL specifies the current location of the vertical scroll | |
1013 | bars (`left', `right', or nil), and HORIZONTAL specifies the | |
1014 | current location of the horizontal scroll bars (`top', `bottom', | |
1015 | or nil). | |
1016 | ||
1017 | Unlike `window-scroll-bars', this function reports the scroll bar | |
1018 | type actually used, once frame defaults and `scroll-bar-mode' are | |
1019 | taken into account." | |
5386012d | 1020 | (setq window (window-normalize-live-window window)) |
3c448ab6 MR |
1021 | (let ((vert (nth 2 (window-scroll-bars window))) |
1022 | (hor nil)) | |
1023 | (when (or (eq vert t) (eq hor t)) | |
387522b2 | 1024 | (let ((fcsb (frame-current-scroll-bars (window-frame window)))) |
3c448ab6 MR |
1025 | (if (eq vert t) |
1026 | (setq vert (car fcsb))) | |
1027 | (if (eq hor t) | |
1028 | (setq hor (cdr fcsb))))) | |
1029 | (cons vert hor))) | |
1030 | ||
1031 | (defun walk-windows (proc &optional minibuf all-frames) | |
387522b2 | 1032 | "Cycle through all live windows, calling PROC for each one. |
3c448ab6 MR |
1033 | PROC must specify a function with a window as its sole argument. |
1034 | The optional arguments MINIBUF and ALL-FRAMES specify the set of | |
387522b2 | 1035 | windows to include in the walk. |
3c448ab6 MR |
1036 | |
1037 | MINIBUF t means include the minibuffer window even if the | |
1038 | minibuffer is not active. MINIBUF nil or omitted means include | |
1039 | the minibuffer window only if the minibuffer is active. Any | |
1040 | other value means do not include the minibuffer window even if | |
1041 | the minibuffer is active. | |
1042 | ||
387522b2 MR |
1043 | ALL-FRAMES nil or omitted means consider all windows on the |
1044 | selected frame, plus the minibuffer window if specified by the | |
1045 | MINIBUF argument. If the minibuffer counts, consider all windows | |
1046 | on all frames that share that minibuffer too. The following | |
1047 | non-nil values of ALL-FRAMES have special meanings: | |
1048 | ||
1049 | - t means consider all windows on all existing frames. | |
1050 | ||
1051 | - `visible' means consider all windows on all visible frames on | |
1052 | the current terminal. | |
1053 | ||
1054 | - 0 (the number zero) means consider all windows on all visible | |
1055 | and iconified frames on the current terminal. | |
1056 | ||
1057 | - A frame means consider all windows on that frame only. | |
1058 | ||
1059 | Anything else means consider all windows on the selected frame | |
1060 | and no others. | |
3c448ab6 MR |
1061 | |
1062 | This function changes neither the order of recently selected | |
1063 | windows nor the buffer list." | |
1064 | ;; If we start from the minibuffer window, don't fail to come | |
1065 | ;; back to it. | |
1066 | (when (window-minibuffer-p (selected-window)) | |
1067 | (setq minibuf t)) | |
1068 | ;; Make sure to not mess up the order of recently selected | |
1069 | ;; windows. Use `save-selected-window' and `select-window' | |
1070 | ;; with second argument non-nil for this purpose. | |
1071 | (save-selected-window | |
1072 | (when (framep all-frames) | |
1073 | (select-window (frame-first-window all-frames) 'norecord)) | |
387522b2 MR |
1074 | (dolist (walk-windows-window (window-list-1 nil minibuf all-frames)) |
1075 | (funcall proc walk-windows-window)))) | |
1076 | ||
c96111ea MR |
1077 | (defun window-point-1 (&optional window) |
1078 | "Return value of WINDOW's point. | |
1079 | WINDOW can be any live window and defaults to the selected one. | |
1080 | ||
1081 | This function is like `window-point' with one exception: If | |
1082 | WINDOW is selected, it returns the value of `point' of WINDOW's | |
1083 | buffer regardless of whether that buffer is current or not." | |
1084 | (setq window (window-normalize-live-window window)) | |
1085 | (if (eq window (selected-window)) | |
1086 | (with-current-buffer (window-buffer window) | |
1087 | (point)) | |
1088 | (window-point window))) | |
1089 | ||
1090 | (defun set-window-point-1 (window pos) | |
1091 | "Set value of WINDOW's point to POS. | |
1092 | WINDOW can be any live window and defaults to the selected one. | |
1093 | ||
1094 | This function is like `set-window-point' with one exception: If | |
1095 | WINDOW is selected, it moves `point' of WINDOW's buffer to POS | |
1096 | regardless of whether that buffer is current or not." | |
1097 | (setq window (window-normalize-live-window window)) | |
1098 | (if (eq window (selected-window)) | |
1099 | (with-current-buffer (window-buffer window) | |
1100 | (goto-char pos)) | |
1101 | (set-window-point window pos))) | |
1102 | ||
e07b9a6d MR |
1103 | (defun window-at-side-p (&optional window side) |
1104 | "Return t if WINDOW is at SIDE of its containing frame. | |
1105 | WINDOW can be any window and defaults to the selected one. SIDE | |
1106 | can be any of the symbols `left', `top', `right' or `bottom'. | |
1107 | The default value nil is handled like `bottom'." | |
1108 | (setq window (window-normalize-any-window window)) | |
1109 | (let ((edge | |
1110 | (cond | |
1111 | ((eq side 'left) 0) | |
1112 | ((eq side 'top) 1) | |
1113 | ((eq side 'right) 2) | |
1114 | ((memq side '(bottom nil)) 3)))) | |
1115 | (= (nth edge (window-edges window)) | |
1116 | (nth edge (window-edges (frame-root-window window)))))) | |
1117 | ||
1118 | (defun windows-at-side (&optional frame side) | |
1119 | "Return list of all windows on SIDE of FRAME. | |
1120 | FRAME must be a live frame and defaults to the selected frame. | |
1121 | SIDE can be any of the symbols `left', `top', `right' or | |
1122 | `bottom'. The default value nil is handled like `bottom'." | |
1123 | (setq frame (window-normalize-frame frame)) | |
1124 | (let (windows) | |
1125 | (walk-window-tree | |
1126 | (lambda (window) | |
1127 | (when (window-at-side-p window side) | |
1128 | (setq windows (cons window windows)))) | |
1129 | frame) | |
1130 | (nreverse windows))) | |
1131 | ||
387522b2 MR |
1132 | (defun window-in-direction-2 (window posn &optional horizontal) |
1133 | "Support function for `window-in-direction'." | |
1134 | (if horizontal | |
1135 | (let ((top (window-top-line window))) | |
1136 | (if (> top posn) | |
1137 | (- top posn) | |
1138 | (- posn top (window-total-height window)))) | |
1139 | (let ((left (window-left-column window))) | |
1140 | (if (> left posn) | |
1141 | (- left posn) | |
1142 | (- posn left (window-total-width window)))))) | |
1143 | ||
1144 | (defun window-in-direction (direction &optional window ignore) | |
1145 | "Return window in DIRECTION as seen from WINDOW. | |
1146 | DIRECTION must be one of `above', `below', `left' or `right'. | |
1147 | WINDOW must be a live window and defaults to the selected one. | |
1148 | IGNORE, when non-nil means a window can be returned even if its | |
1149 | `no-other-window' parameter is non-nil." | |
5386012d | 1150 | (setq window (window-normalize-live-window window)) |
387522b2 MR |
1151 | (unless (memq direction '(above below left right)) |
1152 | (error "Wrong direction %s" direction)) | |
1153 | (let* ((frame (window-frame window)) | |
1154 | (hor (memq direction '(left right))) | |
1155 | (first (if hor | |
1156 | (window-left-column window) | |
1157 | (window-top-line window))) | |
1158 | (last (+ first (if hor | |
1159 | (window-total-width window) | |
1160 | (window-total-height window)))) | |
c96111ea | 1161 | (posn-cons (nth 6 (posn-at-point (window-point-1 window) window))) |
387522b2 MR |
1162 | ;; The column / row value of `posn-at-point' can be nil for the |
1163 | ;; mini-window, guard against that. | |
1164 | (posn (if hor | |
1165 | (+ (or (cdr posn-cons) 1) (window-top-line window)) | |
1166 | (+ (or (car posn-cons) 1) (window-left-column window)))) | |
1167 | (best-edge | |
1168 | (cond | |
1169 | ((eq direction 'below) (frame-height frame)) | |
1170 | ((eq direction 'right) (frame-width frame)) | |
1171 | (t -1))) | |
1172 | (best-edge-2 best-edge) | |
1173 | (best-diff-2 (if hor (frame-height frame) (frame-width frame))) | |
1174 | best best-2 best-diff-2-new) | |
1175 | (walk-window-tree | |
1176 | (lambda (w) | |
1177 | (let* ((w-top (window-top-line w)) | |
1178 | (w-left (window-left-column w))) | |
1179 | (cond | |
1180 | ((or (eq window w) | |
1181 | ;; Ignore ourselves. | |
1182 | (and (window-parameter w 'no-other-window) | |
1183 | ;; Ignore W unless IGNORE is non-nil. | |
1184 | (not ignore)))) | |
1185 | (hor | |
1186 | (cond | |
1187 | ((and (<= w-top posn) | |
1188 | (< posn (+ w-top (window-total-height w)))) | |
1189 | ;; W is to the left or right of WINDOW and covers POSN. | |
1190 | (when (or (and (eq direction 'left) | |
1191 | (<= w-left first) (> w-left best-edge)) | |
1192 | (and (eq direction 'right) | |
1193 | (>= w-left last) (< w-left best-edge))) | |
1194 | (setq best-edge w-left) | |
1195 | (setq best w))) | |
1196 | ((and (or (and (eq direction 'left) | |
1197 | (<= (+ w-left (window-total-width w)) first)) | |
1198 | (and (eq direction 'right) (<= last w-left))) | |
1199 | ;; W is to the left or right of WINDOW but does not | |
1200 | ;; cover POSN. | |
1201 | (setq best-diff-2-new | |
1202 | (window-in-direction-2 w posn hor)) | |
1203 | (or (< best-diff-2-new best-diff-2) | |
1204 | (and (= best-diff-2-new best-diff-2) | |
1205 | (if (eq direction 'left) | |
1206 | (> w-left best-edge-2) | |
1207 | (< w-left best-edge-2))))) | |
1208 | (setq best-edge-2 w-left) | |
1209 | (setq best-diff-2 best-diff-2-new) | |
1210 | (setq best-2 w)))) | |
1211 | (t | |
1212 | (cond | |
1213 | ((and (<= w-left posn) | |
1214 | (< posn (+ w-left (window-total-width w)))) | |
1215 | ;; W is above or below WINDOW and covers POSN. | |
1216 | (when (or (and (eq direction 'above) | |
1217 | (<= w-top first) (> w-top best-edge)) | |
1218 | (and (eq direction 'below) | |
1219 | (>= w-top first) (< w-top best-edge))) | |
1220 | (setq best-edge w-top) | |
1221 | (setq best w))) | |
1222 | ((and (or (and (eq direction 'above) | |
1223 | (<= (+ w-top (window-total-height w)) first)) | |
1224 | (and (eq direction 'below) (<= last w-top))) | |
1225 | ;; W is above or below WINDOW but does not cover POSN. | |
1226 | (setq best-diff-2-new | |
1227 | (window-in-direction-2 w posn hor)) | |
1228 | (or (< best-diff-2-new best-diff-2) | |
1229 | (and (= best-diff-2-new best-diff-2) | |
1230 | (if (eq direction 'above) | |
1231 | (> w-top best-edge-2) | |
1232 | (< w-top best-edge-2))))) | |
1233 | (setq best-edge-2 w-top) | |
1234 | (setq best-diff-2 best-diff-2-new) | |
1235 | (setq best-2 w))))))) | |
1236 | (window-frame window)) | |
1237 | (or best best-2))) | |
3c448ab6 | 1238 | |
4c43d97b | 1239 | (defun get-window-with-predicate (predicate &optional minibuf all-frames default) |
387522b2 MR |
1240 | "Return a live window satisfying PREDICATE. |
1241 | More precisely, cycle through all windows calling the function | |
1242 | PREDICATE on each one of them with the window as its sole | |
1243 | argument. Return the first window for which PREDICATE returns | |
4c43d97b MR |
1244 | non-nil. Windows are scanned starting with the window following |
1245 | the selcted window. If no window satisfies PREDICATE, return | |
1246 | DEFAULT. | |
1247 | ||
1248 | MINIBUF t means include the minibuffer window even if the | |
1249 | minibuffer is not active. MINIBUF nil or omitted means include | |
1250 | the minibuffer window only if the minibuffer is active. Any | |
1251 | other value means do not include the minibuffer window even if | |
1252 | the minibuffer is active. | |
387522b2 MR |
1253 | |
1254 | ALL-FRAMES nil or omitted means consider all windows on the selected | |
1255 | frame, plus the minibuffer window if specified by the MINIBUF | |
1256 | argument. If the minibuffer counts, consider all windows on all | |
1257 | frames that share that minibuffer too. The following non-nil | |
1258 | values of ALL-FRAMES have special meanings: | |
3c448ab6 | 1259 | |
387522b2 MR |
1260 | - t means consider all windows on all existing frames. |
1261 | ||
1262 | - `visible' means consider all windows on all visible frames on | |
1263 | the current terminal. | |
1264 | ||
1265 | - 0 (the number zero) means consider all windows on all visible | |
1266 | and iconified frames on the current terminal. | |
1267 | ||
1268 | - A frame means consider all windows on that frame only. | |
1269 | ||
1270 | Anything else means consider all windows on the selected frame | |
1271 | and no others." | |
3c448ab6 | 1272 | (catch 'found |
4c43d97b MR |
1273 | (dolist (window (window-list-1 |
1274 | (next-window nil minibuf all-frames) | |
1275 | minibuf all-frames)) | |
387522b2 MR |
1276 | (when (funcall predicate window) |
1277 | (throw 'found window))) | |
3c448ab6 MR |
1278 | default)) |
1279 | ||
1280 | (defalias 'some-window 'get-window-with-predicate) | |
1281 | ||
190b47e6 MR |
1282 | (defun get-lru-window (&optional all-frames dedicated) |
1283 | "Return the least recently used window on frames specified by ALL-FRAMES. | |
1284 | Return a full-width window if possible. A minibuffer window is | |
1285 | never a candidate. A dedicated window is never a candidate | |
1286 | unless DEDICATED is non-nil, so if all windows are dedicated, the | |
1287 | value is nil. Avoid returning the selected window if possible. | |
1288 | ||
1289 | The following non-nil values of the optional argument ALL-FRAMES | |
1290 | have special meanings: | |
1291 | ||
1292 | - t means consider all windows on all existing frames. | |
1293 | ||
1294 | - `visible' means consider all windows on all visible frames on | |
1295 | the current terminal. | |
1296 | ||
1297 | - 0 (the number zero) means consider all windows on all visible | |
1298 | and iconified frames on the current terminal. | |
1299 | ||
1300 | - A frame means consider all windows on that frame only. | |
1301 | ||
1302 | Any other value of ALL-FRAMES means consider all windows on the | |
1303 | selected frame and no others." | |
1304 | (let (best-window best-time second-best-window second-best-time time) | |
02cfc6d6 | 1305 | (dolist (window (window-list-1 nil 'nomini all-frames)) |
190b47e6 MR |
1306 | (when (or dedicated (not (window-dedicated-p window))) |
1307 | (setq time (window-use-time window)) | |
1308 | (if (or (eq window (selected-window)) | |
1309 | (not (window-full-width-p window))) | |
1310 | (when (or (not second-best-time) (< time second-best-time)) | |
1311 | (setq second-best-time time) | |
1312 | (setq second-best-window window)) | |
1313 | (when (or (not best-time) (< time best-time)) | |
1314 | (setq best-time time) | |
1315 | (setq best-window window))))) | |
1316 | (or best-window second-best-window))) | |
1317 | ||
387522b2 MR |
1318 | (defun get-mru-window (&optional all-frames) |
1319 | "Return the most recently used window on frames specified by ALL-FRAMES. | |
1320 | Do not return a minibuffer window. | |
1321 | ||
1322 | The following non-nil values of the optional argument ALL-FRAMES | |
1323 | have special meanings: | |
1324 | ||
1325 | - t means consider all windows on all existing frames. | |
1326 | ||
1327 | - `visible' means consider all windows on all visible frames on | |
1328 | the current terminal. | |
1329 | ||
1330 | - 0 (the number zero) means consider all windows on all visible | |
1331 | and iconified frames on the current terminal. | |
1332 | ||
1333 | - A frame means consider all windows on that frame only. | |
1334 | ||
1335 | Any other value of ALL-FRAMES means consider all windows on the | |
1336 | selected frame and no others." | |
1337 | (let (best-window best-time time) | |
02cfc6d6 | 1338 | (dolist (window (window-list-1 nil 'nomini all-frames)) |
387522b2 MR |
1339 | (setq time (window-use-time window)) |
1340 | (when (or (not best-time) (> time best-time)) | |
1341 | (setq best-time time) | |
1342 | (setq best-window window))) | |
1343 | best-window)) | |
1344 | ||
190b47e6 MR |
1345 | (defun get-largest-window (&optional all-frames dedicated) |
1346 | "Return the largest window on frames specified by ALL-FRAMES. | |
1347 | A minibuffer window is never a candidate. A dedicated window is | |
1348 | never a candidate unless DEDICATED is non-nil, so if all windows | |
1349 | are dedicated, the value is nil. | |
1350 | ||
1351 | The following non-nil values of the optional argument ALL-FRAMES | |
1352 | have special meanings: | |
1353 | ||
1354 | - t means consider all windows on all existing frames. | |
1355 | ||
1356 | - `visible' means consider all windows on all visible frames on | |
1357 | the current terminal. | |
1358 | ||
1359 | - 0 (the number zero) means consider all windows on all visible | |
1360 | and iconified frames on the current terminal. | |
1361 | ||
1362 | - A frame means consider all windows on that frame only. | |
1363 | ||
1364 | Any other value of ALL-FRAMES means consider all windows on the | |
1365 | selected frame and no others." | |
1366 | (let ((best-size 0) | |
1367 | best-window size) | |
02cfc6d6 | 1368 | (dolist (window (window-list-1 nil 'nomini all-frames)) |
190b47e6 MR |
1369 | (when (or dedicated (not (window-dedicated-p window))) |
1370 | (setq size (* (window-total-size window) | |
1371 | (window-total-size window t))) | |
1372 | (when (> size best-size) | |
1373 | (setq best-size size) | |
1374 | (setq best-window window)))) | |
1375 | best-window)) | |
1376 | ||
3c448ab6 MR |
1377 | (defun get-buffer-window-list (&optional buffer-or-name minibuf all-frames) |
1378 | "Return list of all windows displaying BUFFER-OR-NAME, or nil if none. | |
1379 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer | |
4c43d97b MR |
1380 | and defaults to the current buffer. Windows are scanned starting |
1381 | with the selected window. | |
190b47e6 MR |
1382 | |
1383 | MINIBUF t means include the minibuffer window even if the | |
1384 | minibuffer is not active. MINIBUF nil or omitted means include | |
1385 | the minibuffer window only if the minibuffer is active. Any | |
1386 | other value means do not include the minibuffer window even if | |
1387 | the minibuffer is active. | |
1388 | ||
1389 | ALL-FRAMES nil or omitted means consider all windows on the | |
1390 | selected frame, plus the minibuffer window if specified by the | |
1391 | MINIBUF argument. If the minibuffer counts, consider all windows | |
1392 | on all frames that share that minibuffer too. The following | |
1393 | non-nil values of ALL-FRAMES have special meanings: | |
1394 | ||
1395 | - t means consider all windows on all existing frames. | |
1396 | ||
1397 | - `visible' means consider all windows on all visible frames on | |
1398 | the current terminal. | |
1399 | ||
1400 | - 0 (the number zero) means consider all windows on all visible | |
1401 | and iconified frames on the current terminal. | |
1402 | ||
1403 | - A frame means consider all windows on that frame only. | |
1404 | ||
1405 | Anything else means consider all windows on the selected frame | |
1406 | and no others." | |
5386012d | 1407 | (let ((buffer (window-normalize-buffer buffer-or-name)) |
3c448ab6 | 1408 | windows) |
4c43d97b | 1409 | (dolist (window (window-list-1 (selected-window) minibuf all-frames)) |
190b47e6 MR |
1410 | (when (eq (window-buffer window) buffer) |
1411 | (setq windows (cons window windows)))) | |
1412 | (nreverse windows))) | |
3c448ab6 MR |
1413 | |
1414 | (defun minibuffer-window-active-p (window) | |
1415 | "Return t if WINDOW is the currently active minibuffer window." | |
1416 | (eq window (active-minibuffer-window))) | |
387522b2 | 1417 | |
3c448ab6 | 1418 | (defun count-windows (&optional minibuf) |
387522b2 | 1419 | "Return the number of live windows on the selected frame. |
3c448ab6 MR |
1420 | The optional argument MINIBUF specifies whether the minibuffer |
1421 | window shall be counted. See `walk-windows' for the precise | |
1422 | meaning of this argument." | |
387522b2 | 1423 | (length (window-list-1 nil minibuf))) |
9aab8e0d MR |
1424 | \f |
1425 | ;;; Resizing windows. | |
5386012d | 1426 | (defun window--resize-reset (&optional frame horizontal) |
9aab8e0d MR |
1427 | "Reset resize values for all windows on FRAME. |
1428 | FRAME defaults to the selected frame. | |
1429 | ||
1430 | This function stores the current value of `window-total-size' applied | |
1431 | with argument HORIZONTAL in the new total size of all windows on | |
1432 | FRAME. It also resets the new normal size of each of these | |
1433 | windows." | |
5386012d MR |
1434 | (window--resize-reset-1 |
1435 | (frame-root-window (window-normalize-frame frame)) horizontal)) | |
9aab8e0d | 1436 | |
5386012d MR |
1437 | (defun window--resize-reset-1 (window horizontal) |
1438 | "Internal function of `window--resize-reset'." | |
9aab8e0d MR |
1439 | ;; Register old size in the new total size. |
1440 | (set-window-new-total window (window-total-size window horizontal)) | |
1441 | ;; Reset new normal size. | |
1442 | (set-window-new-normal window) | |
1443 | (when (window-child window) | |
5386012d | 1444 | (window--resize-reset-1 (window-child window) horizontal)) |
9aab8e0d | 1445 | (when (window-right window) |
5386012d | 1446 | (window--resize-reset-1 (window-right window) horizontal))) |
9aab8e0d | 1447 | |
562dd5e9 MR |
1448 | ;; The following routine is used to manually resize the minibuffer |
1449 | ;; window and is currently used, for example, by ispell.el. | |
5386012d | 1450 | (defun window--resize-mini-window (window delta) |
562dd5e9 MR |
1451 | "Resize minibuffer window WINDOW by DELTA lines. |
1452 | If WINDOW cannot be resized by DELTA lines make it as large \(or | |
1453 | as small) as possible but don't signal an error." | |
1454 | (when (window-minibuffer-p window) | |
1455 | (let* ((frame (window-frame window)) | |
1456 | (root (frame-root-window frame)) | |
1457 | (height (window-total-size window)) | |
1458 | (min-delta | |
1459 | (- (window-total-size root) | |
1460 | (window-min-size root)))) | |
1461 | ;; Sanitize DELTA. | |
1462 | (cond | |
1463 | ((<= (+ height delta) 0) | |
1464 | (setq delta (- (- height 1)))) | |
1465 | ((> delta min-delta) | |
1466 | (setq delta min-delta))) | |
1467 | ||
1468 | ;; Resize now. | |
5386012d | 1469 | (window--resize-reset frame) |
562dd5e9 MR |
1470 | ;; Ideally we should be able to resize just the last subwindow of |
1471 | ;; root here. See the comment in `resize-root-window-vertically' | |
1472 | ;; for why we do not do that. | |
5386012d | 1473 | (window--resize-this-window root (- delta) nil nil t) |
562dd5e9 MR |
1474 | (set-window-new-total window (+ height delta)) |
1475 | ;; The following routine catches the case where we want to resize | |
1476 | ;; a minibuffer-only frame. | |
1477 | (resize-mini-window-internal window)))) | |
1478 | ||
d615d6d2 | 1479 | (defun window-resize (window delta &optional horizontal ignore) |
562dd5e9 MR |
1480 | "Resize WINDOW vertically by DELTA lines. |
1481 | WINDOW can be an arbitrary window and defaults to the selected | |
1482 | one. An attempt to resize the root window of a frame will raise | |
1483 | an error though. | |
1484 | ||
1485 | DELTA a positive number means WINDOW shall be enlarged by DELTA | |
1486 | lines. DELTA negative means WINDOW shall be shrunk by -DELTA | |
1487 | lines. | |
1488 | ||
1489 | Optional argument HORIZONTAL non-nil means resize WINDOW | |
1490 | horizontally by DELTA columns. In this case a positive DELTA | |
1491 | means enlarge WINDOW by DELTA columns. DELTA negative means | |
1492 | WINDOW shall be shrunk by -DELTA columns. | |
1493 | ||
1494 | Optional argument IGNORE non-nil means ignore any restrictions | |
1495 | imposed by fixed size windows, `window-min-height' or | |
1496 | `window-min-width' settings. IGNORE any window means ignore | |
1497 | restrictions for that window only. IGNORE equal `safe' means | |
1498 | live windows may get as small as `window-safe-min-height' lines | |
1499 | and `window-safe-min-width' columns. | |
1500 | ||
1501 | This function resizes other windows proportionally and never | |
1502 | deletes any windows. If you want to move only the low (right) | |
1503 | edge of WINDOW consider using `adjust-window-trailing-edge' | |
1504 | instead." | |
5386012d | 1505 | (setq window (window-normalize-any-window window)) |
562dd5e9 MR |
1506 | (let* ((frame (window-frame window)) |
1507 | sibling) | |
1508 | (cond | |
1509 | ((eq window (frame-root-window frame)) | |
1510 | (error "Cannot resize the root window of a frame")) | |
1511 | ((window-minibuffer-p window) | |
5386012d | 1512 | (window--resize-mini-window window delta)) |
562dd5e9 | 1513 | ((window-resizable-p window delta horizontal ignore) |
5386012d MR |
1514 | (window--resize-reset frame horizontal) |
1515 | (window--resize-this-window window delta horizontal ignore t) | |
562dd5e9 | 1516 | (if (and (not (window-splits window)) |
3d8daefe | 1517 | (window-combined-p window horizontal) |
562dd5e9 MR |
1518 | (setq sibling (or (window-right window) (window-left window))) |
1519 | (window-sizable-p sibling (- delta) horizontal ignore)) | |
1520 | ;; If window-splits returns nil for WINDOW, WINDOW is part of | |
1521 | ;; an iso-combination, and WINDOW's neighboring right or left | |
1522 | ;; sibling can be resized as requested, resize that sibling. | |
1523 | (let ((normal-delta | |
1524 | (/ (float delta) | |
1525 | (window-total-size (window-parent window) horizontal)))) | |
5386012d | 1526 | (window--resize-this-window sibling (- delta) horizontal nil t) |
562dd5e9 MR |
1527 | (set-window-new-normal |
1528 | window (+ (window-normal-size window horizontal) | |
1529 | normal-delta)) | |
1530 | (set-window-new-normal | |
1531 | sibling (- (window-normal-size sibling horizontal) | |
1532 | normal-delta))) | |
1533 | ;; Otherwise, resize all other windows in the same combination. | |
5386012d | 1534 | (window--resize-siblings window delta horizontal ignore)) |
d615d6d2 | 1535 | (window-resize-apply frame horizontal)) |
562dd5e9 MR |
1536 | (t |
1537 | (error "Cannot resize window %s" window))))) | |
1538 | ||
5386012d | 1539 | (defsubst window--resize-subwindows-skip-p (window) |
9aab8e0d MR |
1540 | "Return non-nil if WINDOW shall be skipped by resizing routines." |
1541 | (memq (window-new-normal window) '(ignore stuck skip))) | |
1542 | ||
5386012d | 1543 | (defun window--resize-subwindows-normal (parent horizontal window this-delta &optional trail other-delta) |
9aab8e0d MR |
1544 | "Set the new normal height of subwindows of window PARENT. |
1545 | HORIZONTAL non-nil means set the new normal width of these | |
1546 | windows. WINDOW specifies a subwindow of PARENT that has been | |
1547 | resized by THIS-DELTA lines \(columns). | |
1548 | ||
1549 | Optional argument TRAIL either 'before or 'after means set values | |
1550 | for windows before or after WINDOW only. Optional argument | |
1551 | OTHER-DELTA a number specifies that this many lines \(columns) | |
1552 | have been obtained from \(or returned to) an ancestor window of | |
1553 | PARENT in order to resize WINDOW." | |
1554 | (let* ((delta-normal | |
1555 | (if (and (= (- this-delta) (window-total-size window horizontal)) | |
1556 | (zerop other-delta)) | |
1557 | ;; When WINDOW gets deleted and we can return its entire | |
1558 | ;; space to its siblings, use WINDOW's normal size as the | |
1559 | ;; normal delta. | |
1560 | (- (window-normal-size window horizontal)) | |
1561 | ;; In any other case calculate the normal delta from the | |
1562 | ;; relation of THIS-DELTA to the total size of PARENT. | |
1563 | (/ (float this-delta) (window-total-size parent horizontal)))) | |
1564 | (sub (window-child parent)) | |
1565 | (parent-normal 0.0) | |
1566 | (skip (eq trail 'after))) | |
1567 | ||
1568 | ;; Set parent-normal to the sum of the normal sizes of all | |
1569 | ;; subwindows of PARENT that shall be resized, excluding only WINDOW | |
1570 | ;; and any windows specified by the optional TRAIL argument. | |
1571 | (while sub | |
1572 | (cond | |
1573 | ((eq sub window) | |
1574 | (setq skip (eq trail 'before))) | |
1575 | (skip) | |
1576 | (t | |
1577 | (setq parent-normal | |
1578 | (+ parent-normal (window-normal-size sub horizontal))))) | |
1579 | (setq sub (window-right sub))) | |
1580 | ||
1581 | ;; Set the new normal size of all subwindows of PARENT from what | |
1582 | ;; they should have contributed for recovering THIS-DELTA lines | |
1583 | ;; (columns). | |
1584 | (setq sub (window-child parent)) | |
1585 | (setq skip (eq trail 'after)) | |
1586 | (while sub | |
1587 | (cond | |
1588 | ((eq sub window) | |
1589 | (setq skip (eq trail 'before))) | |
1590 | (skip) | |
1591 | (t | |
1592 | (let ((old-normal (window-normal-size sub horizontal))) | |
1593 | (set-window-new-normal | |
1594 | sub (min 1.0 ; Don't get larger than 1. | |
1595 | (max (- old-normal | |
1596 | (* (/ old-normal parent-normal) | |
1597 | delta-normal)) | |
1598 | ;; Don't drop below 0. | |
1599 | 0.0)))))) | |
1600 | (setq sub (window-right sub))) | |
1601 | ||
1602 | (when (numberp other-delta) | |
1603 | ;; Set the new normal size of windows from what they should have | |
1604 | ;; contributed for recovering OTHER-DELTA lines (columns). | |
1605 | (setq delta-normal (/ (float (window-total-size parent horizontal)) | |
1606 | (+ (window-total-size parent horizontal) | |
1607 | other-delta))) | |
1608 | (setq sub (window-child parent)) | |
1609 | (setq skip (eq trail 'after)) | |
1610 | (while sub | |
1611 | (cond | |
1612 | ((eq sub window) | |
1613 | (setq skip (eq trail 'before))) | |
1614 | (skip) | |
1615 | (t | |
1616 | (set-window-new-normal | |
1617 | sub (min 1.0 ; Don't get larger than 1. | |
1618 | (max (* (window-new-normal sub) delta-normal) | |
1619 | ;; Don't drop below 0. | |
1620 | 0.0))))) | |
1621 | (setq sub (window-right sub)))) | |
1622 | ||
1623 | ;; Set the new normal size of WINDOW to what is left by the sum of | |
1624 | ;; the normal sizes of its siblings. | |
1625 | (set-window-new-normal | |
1626 | window | |
1627 | (let ((sum 0)) | |
1628 | (setq sub (window-child parent)) | |
1629 | (while sub | |
1630 | (cond | |
1631 | ((eq sub window)) | |
1632 | ((not (numberp (window-new-normal sub))) | |
1633 | (setq sum (+ sum (window-normal-size sub horizontal)))) | |
1634 | (t | |
1635 | (setq sum (+ sum (window-new-normal sub))))) | |
1636 | (setq sub (window-right sub))) | |
1637 | ;; Don't get larger than 1 or smaller than 0. | |
1638 | (min 1.0 (max (- 1.0 sum) 0.0)))))) | |
1639 | ||
5386012d | 1640 | (defun window--resize-subwindows (parent delta &optional horizontal window ignore trail edge) |
9aab8e0d MR |
1641 | "Resize subwindows of window PARENT vertically by DELTA lines. |
1642 | PARENT must be a vertically combined internal window. | |
1643 | ||
1644 | Optional argument HORIZONTAL non-nil means resize subwindows of | |
1645 | PARENT horizontally by DELTA columns. In this case PARENT must | |
1646 | be a horizontally combined internal window. | |
1647 | ||
1648 | WINDOW, if specified, must denote a child window of PARENT that | |
1649 | is resized by DELTA lines. | |
1650 | ||
1651 | Optional argument IGNORE non-nil means ignore any restrictions | |
1652 | imposed by fixed size windows, `window-min-height' or | |
1653 | `window-min-width' settings. IGNORE equal `safe' means live | |
1654 | windows may get as small as `window-safe-min-height' lines and | |
1655 | `window-safe-min-width' columns. IGNORE any window means ignore | |
1656 | restrictions for that window only. | |
1657 | ||
1658 | Optional arguments TRAIL and EDGE, when non-nil, restrict the set | |
1659 | of windows that shall be resized. If TRAIL equals `before', | |
1660 | resize only windows on the left or above EDGE. If TRAIL equals | |
1661 | `after', resize only windows on the right or below EDGE. Also, | |
1662 | preferably only resize windows adjacent to EDGE. | |
1663 | ||
1664 | Return the symbol `normalized' if new normal sizes have been | |
1665 | already set by this routine." | |
1666 | (let* ((first (window-child parent)) | |
1667 | (sub first) | |
1668 | (parent-total (+ (window-total-size parent horizontal) delta)) | |
1669 | best-window best-value) | |
1670 | ||
1671 | (if (and edge (memq trail '(before after)) | |
1672 | (progn | |
1673 | (setq sub first) | |
1674 | (while (and (window-right sub) | |
1675 | (or (and (eq trail 'before) | |
5386012d | 1676 | (not (window--resize-subwindows-skip-p |
9aab8e0d MR |
1677 | (window-right sub)))) |
1678 | (and (eq trail 'after) | |
5386012d | 1679 | (window--resize-subwindows-skip-p sub)))) |
9aab8e0d MR |
1680 | (setq sub (window-right sub))) |
1681 | sub) | |
1682 | (if horizontal | |
1683 | (if (eq trail 'before) | |
1684 | (= (+ (window-left-column sub) | |
1685 | (window-total-size sub t)) | |
1686 | edge) | |
1687 | (= (window-left-column sub) edge)) | |
1688 | (if (eq trail 'before) | |
1689 | (= (+ (window-top-line sub) | |
1690 | (window-total-size sub)) | |
1691 | edge) | |
1692 | (= (window-top-line sub) edge))) | |
1693 | (window-sizable-p sub delta horizontal ignore)) | |
1694 | ;; Resize only windows adjacent to EDGE. | |
1695 | (progn | |
5386012d MR |
1696 | (window--resize-this-window |
1697 | sub delta horizontal ignore t trail edge) | |
9aab8e0d MR |
1698 | (if (and window (eq (window-parent sub) parent)) |
1699 | (progn | |
1700 | ;; Assign new normal sizes. | |
1701 | (set-window-new-normal | |
1702 | sub (/ (float (window-new-total sub)) parent-total)) | |
1703 | (set-window-new-normal | |
1704 | window (- (window-normal-size window horizontal) | |
1705 | (- (window-new-normal sub) | |
1706 | (window-normal-size sub horizontal))))) | |
5386012d MR |
1707 | (window--resize-subwindows-normal |
1708 | parent horizontal sub 0 trail delta)) | |
1709 | ;; Return 'normalized to notify `window--resize-siblings' that | |
9aab8e0d MR |
1710 | ;; normal sizes have been already set. |
1711 | 'normalized) | |
1712 | ;; Resize all windows proportionally. | |
1713 | (setq sub first) | |
1714 | (while sub | |
1715 | (cond | |
5386012d | 1716 | ((or (window--resize-subwindows-skip-p sub) |
9aab8e0d MR |
1717 | ;; Ignore windows to skip and fixed-size subwindows - in |
1718 | ;; the latter case make it a window to skip. | |
1719 | (and (not ignore) | |
1720 | (window-size-fixed-p sub horizontal) | |
1721 | (set-window-new-normal sub 'ignore)))) | |
1722 | ((< delta 0) | |
1723 | ;; When shrinking store the number of lines/cols we can get | |
1724 | ;; from this window here together with the total/normal size | |
1725 | ;; factor. | |
1726 | (set-window-new-normal | |
1727 | sub | |
1728 | (cons | |
1729 | ;; We used to call this with NODOWN t, "fixed" 2011-05-11. | |
1730 | (window-min-delta sub horizontal ignore trail t) ; t) | |
1731 | (- (/ (float (window-total-size sub horizontal)) | |
1732 | parent-total) | |
1733 | (window-normal-size sub horizontal))))) | |
1734 | ((> delta 0) | |
1735 | ;; When enlarging store the total/normal size factor only | |
1736 | (set-window-new-normal | |
1737 | sub | |
1738 | (- (/ (float (window-total-size sub horizontal)) | |
1739 | parent-total) | |
1740 | (window-normal-size sub horizontal))))) | |
1741 | ||
1742 | (setq sub (window-right sub))) | |
1743 | ||
1744 | (cond | |
1745 | ((< delta 0) | |
1746 | ;; Shrink windows by delta. | |
1747 | (setq best-window t) | |
1748 | (while (and best-window (not (zerop delta))) | |
1749 | (setq sub first) | |
1750 | (setq best-window nil) | |
1751 | (setq best-value most-negative-fixnum) | |
1752 | (while sub | |
1753 | (when (and (consp (window-new-normal sub)) | |
1754 | (not (zerop (car (window-new-normal sub)))) | |
1755 | (> (cdr (window-new-normal sub)) best-value)) | |
1756 | (setq best-window sub) | |
1757 | (setq best-value (cdr (window-new-normal sub)))) | |
1758 | ||
1759 | (setq sub (window-right sub))) | |
1760 | ||
1761 | (when best-window | |
1762 | (setq delta (1+ delta))) | |
1763 | (set-window-new-total best-window -1 t) | |
1764 | (set-window-new-normal | |
1765 | best-window | |
1766 | (if (= (car (window-new-normal best-window)) 1) | |
1767 | 'skip ; We can't shrink best-window any further. | |
1768 | (cons (1- (car (window-new-normal best-window))) | |
1769 | (- (/ (float (window-new-total best-window)) | |
1770 | parent-total) | |
1771 | (window-normal-size best-window horizontal))))))) | |
1772 | ((> delta 0) | |
1773 | ;; Enlarge windows by delta. | |
1774 | (setq best-window t) | |
1775 | (while (and best-window (not (zerop delta))) | |
1776 | (setq sub first) | |
1777 | (setq best-window nil) | |
1778 | (setq best-value most-positive-fixnum) | |
1779 | (while sub | |
1780 | (when (and (numberp (window-new-normal sub)) | |
1781 | (< (window-new-normal sub) best-value)) | |
1782 | (setq best-window sub) | |
1783 | (setq best-value (window-new-normal sub))) | |
1784 | ||
1785 | (setq sub (window-right sub))) | |
1786 | ||
1787 | (when best-window | |
1788 | (setq delta (1- delta))) | |
1789 | (set-window-new-total best-window 1 t) | |
1790 | (set-window-new-normal | |
1791 | best-window | |
1792 | (- (/ (float (window-new-total best-window)) | |
1793 | parent-total) | |
1794 | (window-normal-size best-window horizontal)))))) | |
1795 | ||
1796 | (when best-window | |
1797 | (setq sub first) | |
1798 | (while sub | |
1799 | (when (or (consp (window-new-normal sub)) | |
1800 | (numberp (window-new-normal sub))) | |
d615d6d2 | 1801 | ;; Reset new normal size fields so `window-resize-apply' |
9aab8e0d MR |
1802 | ;; won't use them to apply new sizes. |
1803 | (set-window-new-normal sub)) | |
1804 | ||
1805 | (unless (eq (window-new-normal sub) 'ignore) | |
1806 | ;; Resize this subwindow's subwindows (back-engineering | |
1807 | ;; delta from sub's old and new total sizes). | |
1808 | (let ((delta (- (window-new-total sub) | |
1809 | (window-total-size sub horizontal)))) | |
1810 | (unless (and (zerop delta) (not trail)) | |
1811 | ;; For the TRAIL non-nil case we have to resize SUB | |
1812 | ;; recursively even if it's size does not change. | |
5386012d | 1813 | (window--resize-this-window |
9aab8e0d MR |
1814 | sub delta horizontal ignore nil trail edge)))) |
1815 | (setq sub (window-right sub))))))) | |
1816 | ||
5386012d | 1817 | (defun window--resize-siblings (window delta &optional horizontal ignore trail edge) |
9aab8e0d MR |
1818 | "Resize other windows when WINDOW is resized vertically by DELTA lines. |
1819 | Optional argument HORIZONTAL non-nil means resize other windows | |
1820 | when WINDOW is resized horizontally by DELTA columns. WINDOW | |
1821 | itself is not resized by this function. | |
1822 | ||
1823 | Optional argument IGNORE non-nil means ignore any restrictions | |
1824 | imposed by fixed size windows, `window-min-height' or | |
1825 | `window-min-width' settings. IGNORE equal `safe' means live | |
1826 | windows may get as small as `window-safe-min-height' lines and | |
1827 | `window-safe-min-width' columns. IGNORE any window means ignore | |
1828 | restrictions for that window only. | |
1829 | ||
1830 | Optional arguments TRAIL and EDGE, when non-nil, refine the set | |
1831 | of windows that shall be resized. If TRAIL equals `before', | |
1832 | resize only windows on the left or above EDGE. If TRAIL equals | |
1833 | `after', resize only windows on the right or below EDGE. Also, | |
1834 | preferably only resize windows adjacent to EDGE." | |
1835 | (when (window-parent window) | |
1836 | (let* ((parent (window-parent window)) | |
1837 | (sub (window-child parent))) | |
3d8daefe | 1838 | (if (window-combined-p sub horizontal) |
9aab8e0d MR |
1839 | ;; In an iso-combination try to extract DELTA from WINDOW's |
1840 | ;; siblings. | |
1841 | (let ((first sub) | |
1842 | (skip (eq trail 'after)) | |
1843 | this-delta other-delta) | |
1844 | ;; Decide which windows shall be left alone. | |
1845 | (while sub | |
1846 | (cond | |
1847 | ((eq sub window) | |
1848 | ;; Make sure WINDOW is left alone when | |
1849 | ;; resizing its siblings. | |
1850 | (set-window-new-normal sub 'ignore) | |
1851 | (setq skip (eq trail 'before))) | |
1852 | (skip | |
1853 | ;; Make sure this sibling is left alone when | |
1854 | ;; resizing its siblings. | |
1855 | (set-window-new-normal sub 'ignore)) | |
1856 | ((or (window-size-ignore sub ignore) | |
1857 | (not (window-size-fixed-p sub horizontal))) | |
1858 | ;; Set this-delta to t to signal that we found a sibling | |
1859 | ;; of WINDOW whose size is not fixed. | |
1860 | (setq this-delta t))) | |
1861 | ||
1862 | (setq sub (window-right sub))) | |
1863 | ||
1864 | ;; Set this-delta to what we can get from WINDOW's siblings. | |
1865 | (if (= (- delta) (window-total-size window horizontal)) | |
1866 | ;; A deletion, presumably. We must handle this case | |
1867 | ;; specially since `window-resizable' can't be used. | |
1868 | (if this-delta | |
1869 | ;; There's at least one resizable sibling we can | |
1870 | ;; give WINDOW's size to. | |
1871 | (setq this-delta delta) | |
1872 | ;; No resizable sibling exists. | |
1873 | (setq this-delta 0)) | |
1874 | ;; Any other form of resizing. | |
1875 | (setq this-delta | |
1876 | (window-resizable window delta horizontal ignore trail t))) | |
1877 | ||
1878 | ;; Set other-delta to what we still have to get from | |
1879 | ;; ancestor windows of parent. | |
1880 | (setq other-delta (- delta this-delta)) | |
1881 | (unless (zerop other-delta) | |
1882 | ;; Unless we got everything from WINDOW's siblings, PARENT | |
1883 | ;; must be resized by other-delta lines or columns. | |
1884 | (set-window-new-total parent other-delta 'add)) | |
1885 | ||
1886 | (if (zerop this-delta) | |
1887 | ;; We haven't got anything from WINDOW's siblings but we | |
1888 | ;; must update the normal sizes to respect other-delta. | |
5386012d | 1889 | (window--resize-subwindows-normal |
9aab8e0d MR |
1890 | parent horizontal window this-delta trail other-delta) |
1891 | ;; We did get something from WINDOW's siblings which means | |
1892 | ;; we have to resize their subwindows. | |
5386012d MR |
1893 | (unless (eq (window--resize-subwindows |
1894 | parent (- this-delta) horizontal | |
1895 | window ignore trail edge) | |
1896 | ;; If `window--resize-subwindows' returns | |
1897 | ;; 'normalized, this means it has set the | |
1898 | ;; normal sizes already. | |
9aab8e0d MR |
1899 | 'normalized) |
1900 | ;; Set the normal sizes. | |
5386012d | 1901 | (window--resize-subwindows-normal |
9aab8e0d MR |
1902 | parent horizontal window this-delta trail other-delta)) |
1903 | ;; Set DELTA to what we still have to get from ancestor | |
1904 | ;; windows. | |
1905 | (setq delta other-delta))) | |
1906 | ||
1907 | ;; In an ortho-combination all siblings of WINDOW must be | |
1908 | ;; resized by DELTA. | |
1909 | (set-window-new-total parent delta 'add) | |
1910 | (while sub | |
1911 | (unless (eq sub window) | |
5386012d | 1912 | (window--resize-this-window sub delta horizontal ignore t)) |
9aab8e0d MR |
1913 | (setq sub (window-right sub)))) |
1914 | ||
1915 | (unless (zerop delta) | |
1916 | ;; "Go up." | |
5386012d MR |
1917 | (window--resize-siblings |
1918 | parent delta horizontal ignore trail edge))))) | |
9aab8e0d | 1919 | |
5386012d | 1920 | (defun window--resize-this-window (window delta &optional horizontal ignore add trail edge) |
9aab8e0d MR |
1921 | "Resize WINDOW vertically by DELTA lines. |
1922 | Optional argument HORIZONTAL non-nil means resize WINDOW | |
1923 | horizontally by DELTA columns. | |
1924 | ||
1925 | Optional argument IGNORE non-nil means ignore any restrictions | |
1926 | imposed by fixed size windows, `window-min-height' or | |
1927 | `window-min-width' settings. IGNORE equal `safe' means live | |
1928 | windows may get as small as `window-safe-min-height' lines and | |
1929 | `window-safe-min-width' columns. IGNORE any window means ignore | |
1930 | restrictions for that window only. | |
1931 | ||
1932 | Optional argument ADD non-nil means add DELTA to the new total | |
1933 | size of WINDOW. | |
1934 | ||
1935 | Optional arguments TRAIL and EDGE, when non-nil, refine the set | |
1936 | of windows that shall be resized. If TRAIL equals `before', | |
1937 | resize only windows on the left or above EDGE. If TRAIL equals | |
1938 | `after', resize only windows on the right or below EDGE. Also, | |
1939 | preferably only resize windows adjacent to EDGE. | |
1940 | ||
1941 | This function recursively resizes WINDOW's subwindows to fit the | |
1942 | new size. Make sure that WINDOW is `window-resizable' before | |
1943 | calling this function. Note that this function does not resize | |
1944 | siblings of WINDOW or WINDOW's parent window. You have to | |
d615d6d2 | 1945 | eventually call `window-resize-apply' in order to make resizing |
9aab8e0d MR |
1946 | actually take effect." |
1947 | (when add | |
1948 | ;; Add DELTA to the new total size of WINDOW. | |
1949 | (set-window-new-total window delta t)) | |
387522b2 | 1950 | |
9aab8e0d MR |
1951 | (let ((sub (window-child window))) |
1952 | (cond | |
1953 | ((not sub)) | |
3d8daefe | 1954 | ((window-combined-p sub horizontal) |
9aab8e0d MR |
1955 | ;; In an iso-combination resize subwindows according to their |
1956 | ;; normal sizes. | |
5386012d MR |
1957 | (window--resize-subwindows |
1958 | window delta horizontal nil ignore trail edge)) | |
9aab8e0d MR |
1959 | ;; In an ortho-combination resize each subwindow by DELTA. |
1960 | (t | |
1961 | (while sub | |
5386012d MR |
1962 | (window--resize-this-window |
1963 | sub delta horizontal ignore t trail edge) | |
9aab8e0d MR |
1964 | (setq sub (window-right sub))))))) |
1965 | ||
5386012d | 1966 | (defun window--resize-root-window (window delta horizontal ignore) |
9aab8e0d MR |
1967 | "Resize root window WINDOW vertically by DELTA lines. |
1968 | HORIZONTAL non-nil means resize root window WINDOW horizontally | |
1969 | by DELTA columns. | |
1970 | ||
1971 | IGNORE non-nil means ignore any restrictions imposed by fixed | |
1972 | size windows, `window-min-height' or `window-min-width' settings. | |
1973 | ||
1974 | This function is only called by the frame resizing routines. It | |
1975 | resizes windows proportionally and never deletes any windows." | |
1976 | (when (and (windowp window) (numberp delta) | |
1977 | (window-sizable-p window delta horizontal ignore)) | |
5386012d MR |
1978 | (window--resize-reset (window-frame window) horizontal) |
1979 | (window--resize-this-window window delta horizontal ignore t))) | |
9aab8e0d | 1980 | |
5386012d | 1981 | (defun window--resize-root-window-vertically (window delta) |
9aab8e0d MR |
1982 | "Resize root window WINDOW vertically by DELTA lines. |
1983 | If DELTA is less than zero and we can't shrink WINDOW by DELTA | |
1984 | lines, shrink it as much as possible. If DELTA is greater than | |
1985 | zero, this function can resize fixed-size subwindows in order to | |
1986 | recover the necessary lines. | |
1987 | ||
1988 | Return the number of lines that were recovered. | |
1989 | ||
1990 | This function is only called by the minibuffer window resizing | |
1991 | routines. It resizes windows proportionally and never deletes | |
1992 | any windows." | |
1993 | (when (numberp delta) | |
1994 | (let (ignore) | |
1995 | (cond | |
1996 | ((< delta 0) | |
1997 | (setq delta (window-sizable window delta))) | |
1998 | ((> delta 0) | |
1999 | (unless (window-sizable window delta) | |
2000 | (setq ignore t)))) | |
2001 | ||
5386012d | 2002 | (window--resize-reset (window-frame window)) |
9aab8e0d MR |
2003 | ;; Ideally, we would resize just the last window in a combination |
2004 | ;; but that's not feasible for the following reason: If we grow | |
2005 | ;; the minibuffer window and the last window cannot be shrunk any | |
2006 | ;; more, we shrink another window instead. But if we then shrink | |
2007 | ;; the minibuffer window again, the last window might get enlarged | |
2008 | ;; and the state after shrinking is not the state before growing. | |
2009 | ;; So, in practice, we'd need a history variable to record how to | |
2010 | ;; proceed. But I'm not sure how such a variable could work with | |
2011 | ;; repeated minibuffer window growing steps. | |
5386012d | 2012 | (window--resize-this-window window delta nil ignore t) |
9aab8e0d MR |
2013 | delta))) |
2014 | ||
562dd5e9 MR |
2015 | (defun adjust-window-trailing-edge (window delta &optional horizontal) |
2016 | "Move WINDOW's bottom edge by DELTA lines. | |
2017 | Optional argument HORIZONTAL non-nil means move WINDOW's right | |
2018 | edge by DELTA columns. WINDOW defaults to the selected window. | |
2019 | ||
2020 | If DELTA is greater zero, then move the edge downwards or to the | |
2021 | right. If DELTA is less than zero, move the edge upwards or to | |
2022 | the left. If the edge can't be moved by DELTA lines or columns, | |
2023 | move it as far as possible in the desired direction." | |
5386012d | 2024 | (setq window (window-normalize-any-window window)) |
562dd5e9 MR |
2025 | (let ((frame (window-frame window)) |
2026 | (right window) | |
2027 | left this-delta min-delta max-delta failed) | |
2028 | ;; Find the edge we want to move. | |
3d8daefe | 2029 | (while (and (or (not (window-combined-p right horizontal)) |
562dd5e9 MR |
2030 | (not (window-right right))) |
2031 | (setq right (window-parent right)))) | |
2032 | (cond | |
2033 | ((and (not right) (not horizontal) (not resize-mini-windows) | |
2034 | (eq (window-frame (minibuffer-window frame)) frame)) | |
5386012d | 2035 | (window--resize-mini-window (minibuffer-window frame) (- delta))) |
562dd5e9 MR |
2036 | ((or (not (setq left right)) (not (setq right (window-right right)))) |
2037 | (if horizontal | |
2038 | (error "No window on the right of this one") | |
2039 | (error "No window below this one"))) | |
2040 | (t | |
2041 | ;; Set LEFT to the first resizable window on the left. This step is | |
2042 | ;; needed to handle fixed-size windows. | |
2043 | (while (and left (window-size-fixed-p left horizontal)) | |
2044 | (setq left | |
2045 | (or (window-left left) | |
2046 | (progn | |
2047 | (while (and (setq left (window-parent left)) | |
3d8daefe | 2048 | (not (window-combined-p left horizontal)))) |
562dd5e9 MR |
2049 | (window-left left))))) |
2050 | (unless left | |
2051 | (if horizontal | |
2052 | (error "No resizable window on the left of this one") | |
2053 | (error "No resizable window above this one"))) | |
2054 | ||
2055 | ;; Set RIGHT to the first resizable window on the right. This step | |
2056 | ;; is needed to handle fixed-size windows. | |
2057 | (while (and right (window-size-fixed-p right horizontal)) | |
2058 | (setq right | |
2059 | (or (window-right right) | |
2060 | (progn | |
2061 | (while (and (setq right (window-parent right)) | |
3d8daefe | 2062 | (not (window-combined-p right horizontal)))) |
562dd5e9 MR |
2063 | (window-right right))))) |
2064 | (unless right | |
2065 | (if horizontal | |
2066 | (error "No resizable window on the right of this one") | |
2067 | (error "No resizable window below this one"))) | |
2068 | ||
2069 | ;; LEFT and RIGHT (which might be both internal windows) are now the | |
2070 | ;; two windows we want to resize. | |
2071 | (cond | |
2072 | ((> delta 0) | |
2073 | (setq max-delta (window-max-delta-1 left 0 horizontal nil 'after)) | |
2074 | (setq min-delta (window-min-delta-1 right (- delta) horizontal nil 'before)) | |
2075 | (when (or (< max-delta delta) (> min-delta (- delta))) | |
2076 | ;; We can't get the whole DELTA - move as far as possible. | |
2077 | (setq delta (min max-delta (- min-delta)))) | |
2078 | (unless (zerop delta) | |
2079 | ;; Start resizing. | |
5386012d | 2080 | (window--resize-reset frame horizontal) |
562dd5e9 MR |
2081 | ;; Try to enlarge LEFT first. |
2082 | (setq this-delta (window-resizable left delta horizontal)) | |
2083 | (unless (zerop this-delta) | |
5386012d | 2084 | (window--resize-this-window |
562dd5e9 MR |
2085 | left this-delta horizontal nil t 'before |
2086 | (if horizontal | |
2087 | (+ (window-left-column left) (window-total-size left t)) | |
2088 | (+ (window-top-line left) (window-total-size left))))) | |
2089 | ;; Shrink windows on right of LEFT. | |
5386012d | 2090 | (window--resize-siblings |
562dd5e9 MR |
2091 | left delta horizontal nil 'after |
2092 | (if horizontal | |
2093 | (window-left-column right) | |
2094 | (window-top-line right))))) | |
2095 | ((< delta 0) | |
2096 | (setq max-delta (window-max-delta-1 right 0 horizontal nil 'before)) | |
2097 | (setq min-delta (window-min-delta-1 left delta horizontal nil 'after)) | |
2098 | (when (or (< max-delta (- delta)) (> min-delta delta)) | |
2099 | ;; We can't get the whole DELTA - move as far as possible. | |
2100 | (setq delta (max (- max-delta) min-delta))) | |
2101 | (unless (zerop delta) | |
2102 | ;; Start resizing. | |
5386012d | 2103 | (window--resize-reset frame horizontal) |
562dd5e9 MR |
2104 | ;; Try to enlarge RIGHT. |
2105 | (setq this-delta (window-resizable right (- delta) horizontal)) | |
2106 | (unless (zerop this-delta) | |
5386012d | 2107 | (window--resize-this-window |
562dd5e9 MR |
2108 | right this-delta horizontal nil t 'after |
2109 | (if horizontal | |
2110 | (window-left-column right) | |
2111 | (window-top-line right)))) | |
2112 | ;; Shrink windows on left of RIGHT. | |
5386012d | 2113 | (window--resize-siblings |
562dd5e9 MR |
2114 | right (- delta) horizontal nil 'before |
2115 | (if horizontal | |
2116 | (+ (window-left-column left) (window-total-size left t)) | |
2117 | (+ (window-top-line left) (window-total-size left))))))) | |
2118 | (unless (zerop delta) | |
2119 | ;; Don't report an error in the standard case. | |
d615d6d2 | 2120 | (unless (window-resize-apply frame horizontal) |
562dd5e9 MR |
2121 | ;; But do report an error if applying the changes fails. |
2122 | (error "Failed adjusting window %s" window))))))) | |
2123 | ||
2124 | (defun enlarge-window (delta &optional horizontal) | |
2125 | "Make selected window DELTA lines taller. | |
2126 | Interactively, if no argument is given, make the selected window | |
2127 | one line taller. If optional argument HORIZONTAL is non-nil, | |
2128 | make selected window wider by DELTA columns. If DELTA is | |
2129 | negative, shrink selected window by -DELTA lines or columns. | |
2130 | Return nil." | |
2131 | (interactive "p") | |
67222e1d MR |
2132 | (cond |
2133 | ((zerop delta)) | |
2134 | ((window-size-fixed-p nil horizontal) | |
2135 | (error "Selected window has fixed size")) | |
2136 | ((window-resizable-p nil delta horizontal) | |
d615d6d2 | 2137 | (window-resize nil delta horizontal)) |
67222e1d | 2138 | (t |
d615d6d2 | 2139 | (window-resize |
67222e1d MR |
2140 | nil (if (> delta 0) |
2141 | (window-max-delta nil horizontal) | |
2142 | (- (window-min-delta nil horizontal))) | |
2143 | horizontal)))) | |
562dd5e9 MR |
2144 | |
2145 | (defun shrink-window (delta &optional horizontal) | |
2146 | "Make selected window DELTA lines smaller. | |
2147 | Interactively, if no argument is given, make the selected window | |
2148 | one line smaller. If optional argument HORIZONTAL is non-nil, | |
2149 | make selected window narrower by DELTA columns. If DELTA is | |
2150 | negative, enlarge selected window by -DELTA lines or columns. | |
2151 | Return nil." | |
2152 | (interactive "p") | |
67222e1d MR |
2153 | (cond |
2154 | ((zerop delta)) | |
2155 | ((window-size-fixed-p nil horizontal) | |
2156 | (error "Selected window has fixed size")) | |
2157 | ((window-resizable-p nil (- delta) horizontal) | |
d615d6d2 | 2158 | (window-resize nil (- delta) horizontal)) |
67222e1d | 2159 | (t |
d615d6d2 | 2160 | (window-resize |
67222e1d MR |
2161 | nil (if (> delta 0) |
2162 | (- (window-min-delta nil horizontal)) | |
2163 | (window-max-delta nil horizontal)) | |
2164 | horizontal)))) | |
562dd5e9 MR |
2165 | |
2166 | (defun maximize-window (&optional window) | |
2167 | "Maximize WINDOW. | |
2168 | Make WINDOW as large as possible without deleting any windows. | |
2169 | WINDOW can be any window and defaults to the selected window." | |
2170 | (interactive) | |
5386012d | 2171 | (setq window (window-normalize-any-window window)) |
d615d6d2 MR |
2172 | (window-resize window (window-max-delta window)) |
2173 | (window-resize window (window-max-delta window t) t)) | |
562dd5e9 MR |
2174 | |
2175 | (defun minimize-window (&optional window) | |
2176 | "Minimize WINDOW. | |
2177 | Make WINDOW as small as possible without deleting any windows. | |
2178 | WINDOW can be any window and defaults to the selected window." | |
2179 | (interactive) | |
5386012d | 2180 | (setq window (window-normalize-any-window window)) |
d615d6d2 MR |
2181 | (window-resize window (- (window-min-delta window))) |
2182 | (window-resize window (- (window-min-delta window t)) t)) | |
562dd5e9 | 2183 | \f |
9aab8e0d MR |
2184 | (defsubst frame-root-window-p (window) |
2185 | "Return non-nil if WINDOW is the root window of its frame." | |
2186 | (eq window (frame-root-window window))) | |
6198ccd0 MR |
2187 | |
2188 | (defun window-tree-1 (window &optional next) | |
2189 | "Return window tree rooted at WINDOW. | |
2190 | Optional argument NEXT non-nil means include windows right | |
2191 | siblings in the return value. | |
2192 | ||
2193 | See the documentation of `window-tree' for a description of the | |
2194 | return value." | |
2195 | (let (list) | |
2196 | (while window | |
2197 | (setq list | |
2198 | (cons | |
2199 | (cond | |
d68443dc | 2200 | ((window-top-child window) |
6198ccd0 | 2201 | (cons t (cons (window-edges window) |
d68443dc MR |
2202 | (window-tree-1 (window-top-child window) t)))) |
2203 | ((window-left-child window) | |
6198ccd0 | 2204 | (cons nil (cons (window-edges window) |
d68443dc | 2205 | (window-tree-1 (window-left-child window) t)))) |
6198ccd0 MR |
2206 | (t window)) |
2207 | list)) | |
d68443dc | 2208 | (setq window (when next (window-next-sibling window)))) |
6198ccd0 MR |
2209 | (nreverse list))) |
2210 | ||
2211 | (defun window-tree (&optional frame) | |
2212 | "Return the window tree of frame FRAME. | |
2213 | FRAME must be a live frame and defaults to the selected frame. | |
2214 | The return value is a list of the form (ROOT MINI), where ROOT | |
2215 | represents the window tree of the frame's root window, and MINI | |
2216 | is the frame's minibuffer window. | |
2217 | ||
2218 | If the root window is not split, ROOT is the root window itself. | |
2219 | Otherwise, ROOT is a list (DIR EDGES W1 W2 ...) where DIR is nil | |
2220 | for a horizontal split, and t for a vertical split. EDGES gives | |
2221 | the combined size and position of the subwindows in the split, | |
2222 | and the rest of the elements are the subwindows in the split. | |
2223 | Each of the subwindows may again be a window or a list | |
2224 | representing a window split, and so on. EDGES is a list \(LEFT | |
2225 | TOP RIGHT BOTTOM) as returned by `window-edges'." | |
5386012d | 2226 | (setq frame (window-normalize-frame frame)) |
6198ccd0 | 2227 | (window-tree-1 (frame-root-window frame) t)) |
9aab8e0d | 2228 | \f |
9397e56f MR |
2229 | (defun other-window (count &optional all-frames) |
2230 | "Select another window in cyclic ordering of windows. | |
2231 | COUNT specifies the number of windows to skip, starting with the | |
2232 | selected window, before making the selection. If COUNT is | |
2233 | positive, skip COUNT windows forwards. If COUNT is negative, | |
2234 | skip -COUNT windows backwards. COUNT zero means do not skip any | |
2235 | window, so select the selected window. In an interactive call, | |
2236 | COUNT is the numeric prefix argument. Return nil. | |
2237 | ||
2238 | If the `other-window' parameter of WINDOW is a function and | |
2239 | `ignore-window-parameters' is nil, call that function with the | |
2240 | arguments COUNT and ALL-FRAMES. | |
2241 | ||
2242 | This function does not select a window whose `no-other-window' | |
2243 | window parameter is non-nil. | |
2244 | ||
2245 | This function uses `next-window' for finding the window to | |
2246 | select. The argument ALL-FRAMES has the same meaning as in | |
2247 | `next-window', but the MINIBUF argument of `next-window' is | |
2248 | always effectively nil." | |
2249 | (interactive "p") | |
2250 | (let* ((window (selected-window)) | |
2251 | (function (and (not ignore-window-parameters) | |
2252 | (window-parameter window 'other-window))) | |
2253 | old-window old-count) | |
2254 | (if (functionp function) | |
2255 | (funcall function count all-frames) | |
2256 | ;; `next-window' and `previous-window' may return a window we are | |
2257 | ;; not allowed to select. Hence we need an exit strategy in case | |
2258 | ;; all windows are non-selectable. | |
2259 | (catch 'exit | |
2260 | (while (> count 0) | |
2261 | (setq window (next-window window nil all-frames)) | |
2262 | (cond | |
2263 | ((eq window old-window) | |
2264 | (when (= count old-count) | |
2265 | ;; Keep out of infinite loops. When COUNT has not changed | |
2266 | ;; since we last looked at `window' we're probably in one. | |
2267 | (throw 'exit nil))) | |
2268 | ((window-parameter window 'no-other-window) | |
2269 | (unless old-window | |
2270 | ;; The first non-selectable window `next-window' got us: | |
2271 | ;; Remember it and the current value of COUNT. | |
2272 | (setq old-window window) | |
2273 | (setq old-count count))) | |
2274 | (t | |
2275 | (setq count (1- count))))) | |
2276 | (while (< count 0) | |
2277 | (setq window (previous-window window nil all-frames)) | |
2278 | (cond | |
2279 | ((eq window old-window) | |
2280 | (when (= count old-count) | |
2281 | ;; Keep out of infinite loops. When COUNT has not changed | |
2282 | ;; since we last looked at `window' we're probably in one. | |
2283 | (throw 'exit nil))) | |
2284 | ((window-parameter window 'no-other-window) | |
2285 | (unless old-window | |
2286 | ;; The first non-selectable window `previous-window' got | |
2287 | ;; us: Remember it and the current value of COUNT. | |
2288 | (setq old-window window) | |
2289 | (setq old-count count))) | |
2290 | (t | |
2291 | (setq count (1+ count))))) | |
2292 | ||
2293 | (select-window window) | |
2294 | ;; Always return nil. | |
2295 | nil)))) | |
2296 | ||
387522b2 MR |
2297 | ;; This should probably return non-nil when the selected window is part |
2298 | ;; of an atomic window whose root is the frame's root window. | |
2299 | (defun one-window-p (&optional nomini all-frames) | |
2300 | "Return non-nil if the selected window is the only window. | |
2301 | Optional arg NOMINI non-nil means don't count the minibuffer | |
2302 | even if it is active. Otherwise, the minibuffer is counted | |
2303 | when it is active. | |
2304 | ||
2305 | Optional argument ALL-FRAMES specifies the set of frames to | |
2306 | consider, see also `next-window'. ALL-FRAMES nil or omitted | |
2307 | means consider windows on the selected frame only, plus the | |
2308 | minibuffer window if specified by the NOMINI argument. If the | |
2309 | minibuffer counts, consider all windows on all frames that share | |
2310 | that minibuffer too. The remaining non-nil values of ALL-FRAMES | |
2311 | with a special meaning are: | |
2312 | ||
2313 | - t means consider all windows on all existing frames. | |
2314 | ||
2315 | - `visible' means consider all windows on all visible frames on | |
2316 | the current terminal. | |
2317 | ||
2318 | - 0 (the number zero) means consider all windows on all visible | |
2319 | and iconified frames on the current terminal. | |
2320 | ||
2321 | - A frame means consider all windows on that frame only. | |
2322 | ||
2323 | Anything else means consider all windows on the selected frame | |
2324 | and no others." | |
2325 | (let ((base-window (selected-window))) | |
2326 | (if (and nomini (eq base-window (minibuffer-window))) | |
2327 | (setq base-window (next-window base-window))) | |
2328 | (eq base-window | |
2329 | (next-window base-window (if nomini 'arg) all-frames)))) | |
3c448ab6 | 2330 | \f |
9aab8e0d | 2331 | ;;; Deleting windows. |
1b36ed6a | 2332 | (defun window-deletable-p (&optional window) |
9aab8e0d | 2333 | "Return t if WINDOW can be safely deleted from its frame. |
e9d90883 | 2334 | Return `frame' if deleting WINDOW should also delete its |
1b36ed6a | 2335 | frame." |
5386012d | 2336 | (setq window (window-normalize-any-window window)) |
8b0874b5 | 2337 | |
9aab8e0d MR |
2338 | (unless ignore-window-parameters |
2339 | ;; Handle atomicity. | |
2340 | (when (window-parameter window 'window-atom) | |
2341 | (setq window (window-atom-root window)))) | |
8b0874b5 MR |
2342 | |
2343 | (let* ((parent (window-parent window)) | |
2344 | (frame (window-frame window)) | |
1b36ed6a | 2345 | (buffer (window-buffer window))) |
9aab8e0d MR |
2346 | (cond |
2347 | ((frame-root-window-p window) | |
85e9c04b CY |
2348 | ;; WINDOW's frame can be deleted only if there are other frames |
2349 | ;; on the same terminal. | |
2350 | (unless (eq frame (next-frame frame 0)) | |
2351 | 'frame)) | |
1b36ed6a MR |
2352 | ((or ignore-window-parameters |
2353 | (not (eq (window-parameter window 'window-side) 'none)) | |
2354 | (and parent (eq (window-parameter parent 'window-side) 'none))) | |
2355 | ;; WINDOW can be deleted unless it is the main window of its | |
2356 | ;; frame. | |
1f3c99ca | 2357 | t)))) |
9aab8e0d MR |
2358 | |
2359 | (defun window-or-subwindow-p (subwindow window) | |
2360 | "Return t if SUBWINDOW is either WINDOW or a subwindow of WINDOW." | |
2361 | (or (eq subwindow window) | |
2362 | (let ((parent (window-parent subwindow))) | |
2363 | (catch 'done | |
2364 | (while parent | |
2365 | (if (eq parent window) | |
2366 | (throw 'done t) | |
2367 | (setq parent (window-parent parent)))))))) | |
2368 | ||
562dd5e9 MR |
2369 | (defun delete-window (&optional window) |
2370 | "Delete WINDOW. | |
2371 | WINDOW can be an arbitrary window and defaults to the selected | |
2372 | one. Return nil. | |
2373 | ||
2374 | If the variable `ignore-window-parameters' is non-nil or the | |
2375 | `delete-window' parameter of WINDOW equals t, do not process any | |
2376 | parameters of WINDOW. Otherwise, if the `delete-window' | |
2377 | parameter of WINDOW specifies a function, call that function with | |
2378 | WINDOW as its sole argument and return the value returned by that | |
2379 | function. | |
2380 | ||
2381 | Otherwise, if WINDOW is part of an atomic window, call | |
2382 | `delete-window' with the root of the atomic window as its | |
2383 | argument. If WINDOW is the only window on its frame or the last | |
2384 | non-side window, signal an error." | |
2385 | (interactive) | |
5386012d | 2386 | (setq window (window-normalize-any-window window)) |
562dd5e9 MR |
2387 | (let* ((frame (window-frame window)) |
2388 | (function (window-parameter window 'delete-window)) | |
2389 | (parent (window-parent window)) | |
2390 | atom-root) | |
2391 | (window-check frame) | |
2392 | (catch 'done | |
2393 | ;; Handle window parameters. | |
2394 | (cond | |
2395 | ;; Ignore window parameters if `ignore-window-parameters' tells | |
2396 | ;; us so or `delete-window' equals t. | |
2397 | ((or ignore-window-parameters (eq function t))) | |
2398 | ((functionp function) | |
2399 | ;; The `delete-window' parameter specifies the function to call. | |
2400 | ;; If that function is `ignore' nothing is done. It's up to the | |
2401 | ;; function called here to avoid infinite recursion. | |
2402 | (throw 'done (funcall function window))) | |
2403 | ((and (window-parameter window 'window-atom) | |
2404 | (setq atom-root (window-atom-root window)) | |
2405 | (not (eq atom-root window))) | |
2406 | (throw 'done (delete-window atom-root))) | |
2407 | ((and (eq (window-parameter window 'window-side) 'none) | |
2408 | (or (not parent) | |
2409 | (not (eq (window-parameter parent 'window-side) 'none)))) | |
2410 | (error "Attempt to delete last non-side window")) | |
2411 | ((not parent) | |
2412 | (error "Attempt to delete minibuffer or sole ordinary window"))) | |
2413 | ||
d68443dc | 2414 | (let* ((horizontal (window-left-child parent)) |
562dd5e9 MR |
2415 | (size (window-total-size window horizontal)) |
2416 | (frame-selected | |
2417 | (window-or-subwindow-p (frame-selected-window frame) window)) | |
2418 | ;; Emacs 23 preferably gives WINDOW's space to its left | |
2419 | ;; sibling. | |
2420 | (sibling (or (window-left window) (window-right window)))) | |
5386012d | 2421 | (window--resize-reset frame horizontal) |
562dd5e9 MR |
2422 | (cond |
2423 | ((and (not (window-splits window)) | |
2424 | sibling (window-sizable-p sibling size)) | |
2425 | ;; Resize WINDOW's sibling. | |
5386012d | 2426 | (window--resize-this-window sibling size horizontal nil t) |
562dd5e9 MR |
2427 | (set-window-new-normal |
2428 | sibling (+ (window-normal-size sibling horizontal) | |
2429 | (window-normal-size window horizontal)))) | |
2430 | ((window-resizable-p window (- size) horizontal nil nil nil t) | |
2431 | ;; Can do without resizing fixed-size windows. | |
5386012d | 2432 | (window--resize-siblings window (- size) horizontal)) |
562dd5e9 MR |
2433 | (t |
2434 | ;; Can't do without resizing fixed-size windows. | |
5386012d | 2435 | (window--resize-siblings window (- size) horizontal t))) |
562dd5e9 MR |
2436 | ;; Actually delete WINDOW. |
2437 | (delete-window-internal window) | |
2438 | (when (and frame-selected | |
2439 | (window-parameter | |
2440 | (frame-selected-window frame) 'no-other-window)) | |
2441 | ;; `delete-window-internal' has selected a window that should | |
2442 | ;; not be selected, fix this here. | |
2443 | (other-window -1 frame)) | |
2444 | (run-window-configuration-change-hook frame) | |
2445 | (window-check frame) | |
2446 | ;; Always return nil. | |
2447 | nil)))) | |
2448 | ||
2449 | (defun delete-other-windows (&optional window) | |
2450 | "Make WINDOW fill its frame. | |
2451 | WINDOW may be any window and defaults to the selected one. | |
2452 | Return nil. | |
2453 | ||
2454 | If the variable `ignore-window-parameters' is non-nil or the | |
2455 | `delete-other-windows' parameter of WINDOW equals t, do not | |
2456 | process any parameters of WINDOW. Otherwise, if the | |
2457 | `delete-other-windows' parameter of WINDOW specifies a function, | |
2458 | call that function with WINDOW as its sole argument and return | |
2459 | the value returned by that function. | |
2460 | ||
2461 | Otherwise, if WINDOW is part of an atomic window, call this | |
2462 | function with the root of the atomic window as its argument. If | |
2463 | WINDOW is a non-side window, make WINDOW the only non-side window | |
2464 | on the frame. Side windows are not deleted. If WINDOW is a side | |
2465 | window signal an error." | |
2466 | (interactive) | |
5386012d | 2467 | (setq window (window-normalize-any-window window)) |
562dd5e9 MR |
2468 | (let* ((frame (window-frame window)) |
2469 | (function (window-parameter window 'delete-other-windows)) | |
2470 | (window-side (window-parameter window 'window-side)) | |
2471 | atom-root side-main) | |
2472 | (window-check frame) | |
2473 | (catch 'done | |
2474 | (cond | |
2475 | ;; Ignore window parameters if `ignore-window-parameters' is t or | |
2476 | ;; `delete-other-windows' is t. | |
2477 | ((or ignore-window-parameters (eq function t))) | |
2478 | ((functionp function) | |
2479 | ;; The `delete-other-windows' parameter specifies the function | |
2480 | ;; to call. If the function is `ignore' no windows are deleted. | |
2481 | ;; It's up to the function called to avoid infinite recursion. | |
2482 | (throw 'done (funcall function window))) | |
2483 | ((and (window-parameter window 'window-atom) | |
2484 | (setq atom-root (window-atom-root window)) | |
2485 | (not (eq atom-root window))) | |
2486 | (throw 'done (delete-other-windows atom-root))) | |
2487 | ((eq window-side 'none) | |
2488 | ;; Set side-main to the major non-side window. | |
2489 | (setq side-main (window-with-parameter 'window-side 'none nil t))) | |
2490 | ((memq window-side window-sides) | |
2491 | (error "Cannot make side window the only window"))) | |
2492 | ;; If WINDOW is the main non-side window, do nothing. | |
2493 | (unless (eq window side-main) | |
2494 | (delete-other-windows-internal window side-main) | |
2495 | (run-window-configuration-change-hook frame) | |
2496 | (window-check frame)) | |
2497 | ;; Always return nil. | |
2498 | nil))) | |
9397e56f MR |
2499 | |
2500 | (defun delete-other-windows-vertically (&optional window) | |
2501 | "Delete the windows in the same column with WINDOW, but not WINDOW itself. | |
2502 | This may be a useful alternative binding for \\[delete-other-windows] | |
2503 | if you often split windows horizontally." | |
2504 | (interactive) | |
2505 | (let* ((window (or window (selected-window))) | |
2506 | (edges (window-edges window)) | |
2507 | (w window) delenda) | |
2508 | (while (not (eq (setq w (next-window w 1)) window)) | |
2509 | (let ((e (window-edges w))) | |
2510 | (when (and (= (car e) (car edges)) | |
2511 | (= (caddr e) (caddr edges))) | |
2512 | (push w delenda)))) | |
2513 | (mapc 'delete-window delenda))) | |
2514 | ||
2515 | ;;; Windows and buffers. | |
2516 | ||
2517 | ;; `prev-buffers' and `next-buffers' are two reserved window slots used | |
2518 | ;; for (1) determining which buffer to show in the window when its | |
2519 | ;; buffer shall be buried or killed and (2) which buffer to show for | |
2520 | ;; `switch-to-prev-buffer' and `switch-to-next-buffer'. | |
2521 | ||
2522 | ;; `prev-buffers' consists of <buffer, window-start, window-point> | |
2523 | ;; triples. The entries on this list are ordered by the time their | |
2524 | ;; buffer has been removed from the window, the most recently removed | |
2525 | ;; buffer's entry being first. The window-start and window-point | |
2526 | ;; components are `window-start' and `window-point' at the time the | |
2527 | ;; buffer was removed from the window which implies that the entry must | |
2528 | ;; be added when `set-window-buffer' removes the buffer from the window. | |
2529 | ||
2530 | ;; `next-buffers' is the list of buffers that have been replaced | |
2531 | ;; recently by `switch-to-prev-buffer'. These buffers are the least | |
2532 | ;; preferred candidates of `switch-to-prev-buffer' and the preferred | |
2533 | ;; candidates of `switch-to-next-buffer' to switch to. This list is | |
2534 | ;; reset to nil by any action changing the window's buffer with the | |
2535 | ;; exception of `switch-to-prev-buffer' and `switch-to-next-buffer'. | |
2536 | ;; `switch-to-prev-buffer' pushes the buffer it just replaced on it, | |
2537 | ;; `switch-to-next-buffer' pops the last pushed buffer from it. | |
2538 | ||
2539 | ;; Both `prev-buffers' and `next-buffers' may reference killed buffers | |
2540 | ;; if such a buffer was killed while the window was hidden within a | |
2541 | ;; window configuration. Such killed buffers get removed whenever | |
2542 | ;; `switch-to-prev-buffer' or `switch-to-next-buffer' encounter them. | |
2543 | ||
2544 | ;; The following function is called by `set-window-buffer' _before_ it | |
2545 | ;; replaces the buffer of the argument window with the new buffer. | |
2546 | (defun record-window-buffer (&optional window) | |
2547 | "Record WINDOW's buffer. | |
2548 | WINDOW must be a live window and defaults to the selected one." | |
5386012d | 2549 | (let* ((window (window-normalize-live-window window)) |
9397e56f MR |
2550 | (buffer (window-buffer window)) |
2551 | (entry (assq buffer (window-prev-buffers window)))) | |
2552 | ;; Reset WINDOW's next buffers. If needed, they are resurrected by | |
2553 | ;; `switch-to-prev-buffer' and `switch-to-next-buffer'. | |
2554 | (set-window-next-buffers window nil) | |
2555 | ||
2556 | (when entry | |
2557 | ;; Remove all entries for BUFFER from WINDOW's previous buffers. | |
2558 | (set-window-prev-buffers | |
2559 | window (assq-delete-all buffer (window-prev-buffers window)))) | |
2560 | ||
2561 | ;; Don't record insignificant buffers. | |
2562 | (unless (eq (aref (buffer-name buffer) 0) ?\s) | |
2563 | ;; Add an entry for buffer to WINDOW's previous buffers. | |
2564 | (with-current-buffer buffer | |
2565 | (let ((start (window-start window)) | |
c96111ea | 2566 | (point (window-point-1 window))) |
9397e56f MR |
2567 | (setq entry |
2568 | (cons buffer | |
2569 | (if entry | |
2570 | ;; We have an entry, update marker positions. | |
2571 | (list (set-marker (nth 1 entry) start) | |
2572 | (set-marker (nth 2 entry) point)) | |
2573 | ;; Make new markers. | |
2574 | (list (copy-marker start) | |
2575 | (copy-marker point))))) | |
2576 | ||
2577 | (set-window-prev-buffers | |
2578 | window (cons entry (window-prev-buffers window)))))))) | |
2579 | ||
2580 | (defun unrecord-window-buffer (&optional window buffer) | |
2581 | "Unrecord BUFFER in WINDOW. | |
2582 | WINDOW must be a live window and defaults to the selected one. | |
2583 | BUFFER must be a live buffer and defaults to the buffer of | |
2584 | WINDOW." | |
5386012d | 2585 | (let* ((window (window-normalize-live-window window)) |
9397e56f MR |
2586 | (buffer (or buffer (window-buffer window)))) |
2587 | (set-window-prev-buffers | |
2588 | window (assq-delete-all buffer (window-prev-buffers window))) | |
2589 | (set-window-next-buffers | |
2590 | window (delq buffer (window-next-buffers window))))) | |
2591 | ||
2592 | (defun set-window-buffer-start-and-point (window buffer &optional start point) | |
2593 | "Set WINDOW's buffer to BUFFER. | |
2594 | Optional argument START non-nil means set WINDOW's start position | |
2595 | to START. Optional argument POINT non-nil means set WINDOW's | |
2596 | point to POINT. If WINDOW is selected this also sets BUFFER's | |
2597 | `point' to POINT. If WINDOW is selected and the buffer it showed | |
2598 | before was current this also makes BUFFER the current buffer." | |
2599 | (let ((selected (eq window (selected-window))) | |
2600 | (current (eq (window-buffer window) (current-buffer)))) | |
2601 | (set-window-buffer window buffer) | |
2602 | (when (and selected current) | |
2603 | (set-buffer buffer)) | |
2604 | (when start | |
cf4eacfd MR |
2605 | ;; Don't force window-start here (even if POINT is nil). |
2606 | (set-window-start window start t)) | |
9397e56f | 2607 | (when point |
c96111ea | 2608 | (set-window-point-1 window point)))) |
9397e56f MR |
2609 | |
2610 | (defun switch-to-prev-buffer (&optional window bury-or-kill) | |
2611 | "In WINDOW switch to previous buffer. | |
2612 | WINDOW must be a live window and defaults to the selected one. | |
2613 | ||
2614 | Optional argument BURY-OR-KILL non-nil means the buffer currently | |
2615 | shown in WINDOW is about to be buried or killed and consequently | |
2616 | shall not be switched to in future invocations of this command." | |
2617 | (interactive) | |
5386012d | 2618 | (let* ((window (window-normalize-live-window window)) |
9397e56f MR |
2619 | (old-buffer (window-buffer window)) |
2620 | ;; Save this since it's destroyed by `set-window-buffer'. | |
2621 | (next-buffers (window-next-buffers window)) | |
1b36ed6a MR |
2622 | entry new-buffer killed-buffers visible) |
2623 | (when (window-dedicated-p window) | |
2624 | (error "Window %s is dedicated to buffer %s" window old-buffer)) | |
2625 | ||
2626 | (catch 'found | |
2627 | ;; Scan WINDOW's previous buffers first, skipping entries of next | |
2628 | ;; buffers. | |
2629 | (dolist (entry (window-prev-buffers window)) | |
2630 | (when (and (setq new-buffer (car entry)) | |
2631 | (or (buffer-live-p new-buffer) | |
2632 | (not (setq killed-buffers | |
2633 | (cons new-buffer killed-buffers)))) | |
2634 | (not (eq new-buffer old-buffer)) | |
2635 | (or bury-or-kill | |
2636 | (not (memq new-buffer next-buffers)))) | |
2637 | (set-window-buffer-start-and-point | |
2638 | window new-buffer (nth 1 entry) (nth 2 entry)) | |
2639 | (throw 'found t))) | |
2640 | ;; Scan reverted buffer list of WINDOW's frame next, skipping | |
2641 | ;; entries of next buffers. Note that when we bury or kill a | |
2642 | ;; buffer we don't reverse the global buffer list to avoid showing | |
2643 | ;; a buried buffer instead. Otherwise, we must reverse the global | |
2644 | ;; buffer list in order to make sure that switching to the | |
2645 | ;; previous/next buffer traverse it in opposite directions. | |
2646 | (dolist (buffer (if bury-or-kill | |
2647 | (buffer-list (window-frame window)) | |
2648 | (nreverse (buffer-list (window-frame window))))) | |
2649 | (when (and (buffer-live-p buffer) | |
2650 | (not (eq buffer old-buffer)) | |
2651 | (not (eq (aref (buffer-name buffer) 0) ?\s)) | |
2652 | (or bury-or-kill (not (memq buffer next-buffers)))) | |
2653 | (if (get-buffer-window buffer) | |
2654 | ;; Try to avoid showing a buffer visible in some other window. | |
2655 | (setq visible buffer) | |
2656 | (setq new-buffer buffer) | |
2657 | (set-window-buffer-start-and-point window new-buffer) | |
2658 | (throw 'found t)))) | |
2659 | (unless bury-or-kill | |
2660 | ;; Scan reverted next buffers last (must not use nreverse | |
2661 | ;; here!). | |
2662 | (dolist (buffer (reverse next-buffers)) | |
2663 | ;; Actually, buffer _must_ be live here since otherwise it | |
2664 | ;; would have been caught in the scan of previous buffers. | |
2665 | (when (and (or (buffer-live-p buffer) | |
9397e56f | 2666 | (not (setq killed-buffers |
1b36ed6a | 2667 | (cons buffer killed-buffers)))) |
9397e56f | 2668 | (not (eq buffer old-buffer)) |
1b36ed6a | 2669 | (setq entry (assq buffer (window-prev-buffers window)))) |
9397e56f | 2670 | (setq new-buffer buffer) |
1b36ed6a MR |
2671 | (set-window-buffer-start-and-point |
2672 | window new-buffer (nth 1 entry) (nth 2 entry)) | |
9397e56f | 2673 | (throw 'found t)))) |
1b36ed6a MR |
2674 | |
2675 | ;; Show a buffer visible in another window. | |
2676 | (when visible | |
2677 | (setq new-buffer visible) | |
2678 | (set-window-buffer-start-and-point window new-buffer))) | |
2679 | ||
2680 | (if bury-or-kill | |
2681 | ;; Remove `old-buffer' from WINDOW's previous and (restored list | |
2682 | ;; of) next buffers. | |
2683 | (progn | |
2684 | (set-window-prev-buffers | |
2685 | window (assq-delete-all old-buffer (window-prev-buffers window))) | |
2686 | (set-window-next-buffers window (delq old-buffer next-buffers))) | |
2687 | ;; Move `old-buffer' to head of WINDOW's restored list of next | |
2688 | ;; buffers. | |
2689 | (set-window-next-buffers | |
2690 | window (cons old-buffer (delq old-buffer next-buffers)))) | |
9397e56f MR |
2691 | |
2692 | ;; Remove killed buffers from WINDOW's previous and next buffers. | |
2693 | (when killed-buffers | |
2694 | (dolist (buffer killed-buffers) | |
2695 | (set-window-prev-buffers | |
2696 | window (assq-delete-all buffer (window-prev-buffers window))) | |
2697 | (set-window-next-buffers | |
2698 | window (delq buffer (window-next-buffers window))))) | |
2699 | ||
2700 | ;; Return new-buffer. | |
2701 | new-buffer)) | |
2702 | ||
2703 | (defun switch-to-next-buffer (&optional window) | |
2704 | "In WINDOW switch to next buffer. | |
2705 | WINDOW must be a live window and defaults to the selected one." | |
2706 | (interactive) | |
5386012d | 2707 | (let* ((window (window-normalize-live-window window)) |
9397e56f MR |
2708 | (old-buffer (window-buffer window)) |
2709 | (next-buffers (window-next-buffers window)) | |
2710 | new-buffer entry killed-buffers visible) | |
2711 | (when (window-dedicated-p window) | |
2712 | (error "Window %s is dedicated to buffer %s" window old-buffer)) | |
2713 | ||
2714 | (catch 'found | |
2715 | ;; Scan WINDOW's next buffers first. | |
2716 | (dolist (buffer next-buffers) | |
2717 | (when (and (or (buffer-live-p buffer) | |
2718 | (not (setq killed-buffers | |
2719 | (cons buffer killed-buffers)))) | |
2720 | (not (eq buffer old-buffer)) | |
2721 | (setq entry (assq buffer (window-prev-buffers window)))) | |
2722 | (setq new-buffer buffer) | |
2723 | (set-window-buffer-start-and-point | |
2724 | window new-buffer (nth 1 entry) (nth 2 entry)) | |
2725 | (throw 'found t))) | |
2726 | ;; Scan the buffer list of WINDOW's frame next, skipping previous | |
2727 | ;; buffers entries. | |
2728 | (dolist (buffer (buffer-list (window-frame window))) | |
2729 | (when (and (buffer-live-p buffer) (not (eq buffer old-buffer)) | |
2730 | (not (eq (aref (buffer-name buffer) 0) ?\s)) | |
2731 | (not (assq buffer (window-prev-buffers window)))) | |
2732 | (if (get-buffer-window buffer) | |
2733 | ;; Try to avoid showing a buffer visible in some other window. | |
2734 | (setq visible buffer) | |
2735 | (setq new-buffer buffer) | |
2736 | (set-window-buffer-start-and-point window new-buffer) | |
2737 | (throw 'found t)))) | |
2738 | ;; Scan WINDOW's reverted previous buffers last (must not use | |
2739 | ;; nreverse here!) | |
2740 | (dolist (entry (reverse (window-prev-buffers window))) | |
2741 | (when (and (setq new-buffer (car entry)) | |
2742 | (or (buffer-live-p new-buffer) | |
2743 | (not (setq killed-buffers | |
2744 | (cons new-buffer killed-buffers)))) | |
2745 | (not (eq new-buffer old-buffer))) | |
2746 | (set-window-buffer-start-and-point | |
2747 | window new-buffer (nth 1 entry) (nth 2 entry)) | |
2748 | (throw 'found t))) | |
2749 | ||
2750 | ;; Show a buffer visible in another window. | |
2751 | (when visible | |
2752 | (setq new-buffer visible) | |
2753 | (set-window-buffer-start-and-point window new-buffer))) | |
2754 | ||
2755 | ;; Remove `new-buffer' from and restore WINDOW's next buffers. | |
2756 | (set-window-next-buffers window (delq new-buffer next-buffers)) | |
2757 | ||
2758 | ;; Remove killed buffers from WINDOW's previous and next buffers. | |
2759 | (when killed-buffers | |
2760 | (dolist (buffer killed-buffers) | |
2761 | (set-window-prev-buffers | |
2762 | window (assq-delete-all buffer (window-prev-buffers window))) | |
2763 | (set-window-next-buffers | |
2764 | window (delq buffer (window-next-buffers window))))) | |
2765 | ||
2766 | ;; Return new-buffer. | |
2767 | new-buffer)) | |
2768 | ||
2769 | (defun get-next-valid-buffer (list &optional buffer visible-ok frame) | |
2770 | "Search LIST for a valid buffer to display in FRAME. | |
2771 | Return nil when all buffers in LIST are undesirable for display, | |
2772 | otherwise return the first suitable buffer in LIST. | |
2773 | ||
2774 | Buffers not visible in windows are preferred to visible buffers, | |
2775 | unless VISIBLE-OK is non-nil. | |
2776 | If the optional argument FRAME is nil, it defaults to the selected frame. | |
2777 | If BUFFER is non-nil, ignore occurrences of that buffer in LIST." | |
2778 | ;; This logic is more or less copied from other-buffer. | |
2779 | (setq frame (or frame (selected-frame))) | |
2780 | (let ((pred (frame-parameter frame 'buffer-predicate)) | |
2781 | found buf) | |
2782 | (while (and (not found) list) | |
2783 | (setq buf (car list)) | |
2784 | (if (and (not (eq buffer buf)) | |
2785 | (buffer-live-p buf) | |
2786 | (or (null pred) (funcall pred buf)) | |
2787 | (not (eq (aref (buffer-name buf) 0) ?\s)) | |
2788 | (or visible-ok (null (get-buffer-window buf 'visible)))) | |
2789 | (setq found buf) | |
2790 | (setq list (cdr list)))) | |
2791 | (car list))) | |
2792 | ||
2793 | (defun last-buffer (&optional buffer visible-ok frame) | |
2794 | "Return the last buffer in FRAME's buffer list. | |
2795 | If BUFFER is the last buffer, return the preceding buffer | |
2796 | instead. Buffers not visible in windows are preferred to visible | |
2797 | buffers, unless optional argument VISIBLE-OK is non-nil. | |
2798 | Optional third argument FRAME nil or omitted means use the | |
2799 | selected frame's buffer list. If no such buffer exists, return | |
2800 | the buffer `*scratch*', creating it if necessary." | |
2801 | (setq frame (or frame (selected-frame))) | |
2802 | (or (get-next-valid-buffer (nreverse (buffer-list frame)) | |
2803 | buffer visible-ok frame) | |
2804 | (get-buffer "*scratch*") | |
2805 | (let ((scratch (get-buffer-create "*scratch*"))) | |
2806 | (set-buffer-major-mode scratch) | |
2807 | scratch))) | |
2808 | ||
5a4cf282 MR |
2809 | (defcustom frame-auto-hide-function #'iconify-frame |
2810 | "Function called to automatically hide frames. | |
2811 | The function is called with one argument - a frame. | |
2812 | ||
2813 | Functions affected by this option are those that bury a buffer | |
2814 | shown in a separate frame like `quit-window' and `bury-buffer'." | |
2815 | :type '(choice (const :tag "Iconify" iconify-frame) | |
2816 | (const :tag "Delete" delete-frame) | |
2817 | (const :tag "Do nothing" ignore) | |
2818 | function) | |
2819 | :group 'windows | |
49677495 MR |
2820 | :group 'frames |
2821 | :version "24.1") | |
0e2070b5 MR |
2822 | |
2823 | (defun window--delete (&optional window dedicated-only kill) | |
2824 | "Delete WINDOW if possible. | |
2825 | WINDOW must be a live window and defaults to the selected one. | |
2826 | Optional argument DEDICATED-ONLY non-nil means to delete WINDOW | |
2827 | only if it's dedicated to its buffer. Optional argument KILL | |
2828 | means the buffer shown in window will be killed. Return non-nil | |
c557cd6b | 2829 | if WINDOW gets deleted or its frame is auto-hidden." |
0e2070b5 MR |
2830 | (setq window (window-normalize-live-window window)) |
2831 | (unless (and dedicated-only (not (window-dedicated-p window))) | |
2832 | (let* ((buffer (window-buffer window)) | |
2833 | (deletable (window-deletable-p window))) | |
2834 | (cond | |
2835 | ((eq deletable 'frame) | |
2836 | (let ((frame (window-frame window))) | |
c557cd6b MR |
2837 | (cond |
2838 | (kill | |
2839 | (delete-frame frame)) | |
2840 | ((functionp frame-auto-hide-function) | |
2841 | (funcall frame-auto-hide-function frame)))) | |
0e2070b5 MR |
2842 | 'frame) |
2843 | (deletable | |
2844 | (delete-window window) | |
2845 | t))))) | |
2846 | ||
9397e56f MR |
2847 | (defun bury-buffer (&optional buffer-or-name) |
2848 | "Put BUFFER-OR-NAME at the end of the list of all buffers. | |
2849 | There it is the least likely candidate for `other-buffer' to | |
2850 | return; thus, the least likely buffer for \\[switch-to-buffer] to | |
2851 | select by default. | |
2852 | ||
2853 | You can specify a buffer name as BUFFER-OR-NAME, or an actual | |
2854 | buffer object. If BUFFER-OR-NAME is nil or omitted, bury the | |
2855 | current buffer. Also, if BUFFER-OR-NAME is nil or omitted, | |
2856 | remove the current buffer from the selected window if it is | |
2857 | displayed there." | |
2858 | (interactive) | |
5386012d | 2859 | (let* ((buffer (window-normalize-buffer buffer-or-name))) |
9397e56f MR |
2860 | ;; If `buffer-or-name' is not on the selected frame we unrecord it |
2861 | ;; although it's not "here" (call it a feature). | |
e4ed06f1 | 2862 | (bury-buffer-internal buffer) |
9397e56f MR |
2863 | ;; Handle case where `buffer-or-name' is nil and the current buffer |
2864 | ;; is shown in the selected window. | |
2865 | (cond | |
2866 | ((or buffer-or-name (not (eq buffer (window-buffer))))) | |
0e2070b5 MR |
2867 | ((window--delete nil t)) |
2868 | (t | |
2869 | ;; Switch to another buffer in window. | |
2870 | (set-window-dedicated-p nil nil) | |
1885e5b8 | 2871 | (switch-to-prev-buffer nil 'bury))) |
1b36ed6a | 2872 | |
9397e56f MR |
2873 | ;; Always return nil. |
2874 | nil)) | |
2875 | ||
2876 | (defun unbury-buffer () | |
2877 | "Switch to the last buffer in the buffer list." | |
2878 | (interactive) | |
2879 | (switch-to-buffer (last-buffer))) | |
2880 | ||
2881 | (defun next-buffer () | |
2882 | "In selected window switch to next buffer." | |
2883 | (interactive) | |
e14b388a CY |
2884 | (if (window-minibuffer-p) |
2885 | (error "Cannot switch buffers in minibuffer window")) | |
9397e56f MR |
2886 | (switch-to-next-buffer)) |
2887 | ||
2888 | (defun previous-buffer () | |
2889 | "In selected window switch to previous buffer." | |
2890 | (interactive) | |
e14b388a CY |
2891 | (if (window-minibuffer-p) |
2892 | (error "Cannot switch buffers in minibuffer window")) | |
9397e56f MR |
2893 | (switch-to-prev-buffer)) |
2894 | ||
2895 | (defun delete-windows-on (&optional buffer-or-name frame) | |
2896 | "Delete all windows showing BUFFER-OR-NAME. | |
2897 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer | |
2898 | and defaults to the current buffer. | |
2899 | ||
2900 | The following non-nil values of the optional argument FRAME | |
2901 | have special meanings: | |
2902 | ||
2903 | - t means consider all windows on the selected frame only. | |
2904 | ||
2905 | - `visible' means consider all windows on all visible frames on | |
2906 | the current terminal. | |
2907 | ||
2908 | - 0 (the number zero) means consider all windows on all visible | |
2909 | and iconified frames on the current terminal. | |
2910 | ||
2911 | - A frame means consider all windows on that frame only. | |
2912 | ||
2913 | Any other value of FRAME means consider all windows on all | |
2914 | frames. | |
2915 | ||
2916 | When a window showing BUFFER-OR-NAME is dedicated and the only | |
2917 | window of its frame, that frame is deleted when there are other | |
2918 | frames left." | |
2919 | (interactive "BDelete windows on (buffer):\nP") | |
5386012d | 2920 | (let ((buffer (window-normalize-buffer buffer-or-name)) |
9397e56f MR |
2921 | ;; Handle the "inverted" meaning of the FRAME argument wrt other |
2922 | ;; `window-list-1' based function. | |
2923 | (all-frames (cond ((not frame) t) ((eq frame t) nil) (t frame)))) | |
2924 | (dolist (window (window-list-1 nil nil all-frames)) | |
2925 | (if (eq (window-buffer window) buffer) | |
1b36ed6a | 2926 | (let ((deletable (window-deletable-p window))) |
9397e56f | 2927 | (cond |
1b36ed6a MR |
2928 | ((and (eq deletable 'frame) (window-dedicated-p window)) |
2929 | ;; Delete frame if and only if window is dedicated. | |
9397e56f | 2930 | (delete-frame (window-frame window))) |
1b36ed6a MR |
2931 | ((eq deletable t) |
2932 | ;; Delete window. | |
9397e56f MR |
2933 | (delete-window window)) |
2934 | (t | |
2935 | ;; In window switch to previous buffer. | |
2936 | (set-window-dedicated-p window nil) | |
2937 | (switch-to-prev-buffer window 'bury)))) | |
2938 | ;; If a window doesn't show BUFFER, unrecord BUFFER in it. | |
2939 | (unrecord-window-buffer window buffer))))) | |
2940 | ||
2941 | (defun replace-buffer-in-windows (&optional buffer-or-name) | |
2942 | "Replace BUFFER-OR-NAME with some other buffer in all windows showing it. | |
2943 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer | |
2944 | and defaults to the current buffer. | |
2945 | ||
0e2070b5 MR |
2946 | When a window showing BUFFER-OR-NAME is dedicated, that window is |
2947 | deleted. If that window is the only window on its frame, the | |
2948 | frame is deleted too when there are other frames left. If there | |
2949 | are no other frames left, some other buffer is displayed in that | |
2950 | window. | |
9397e56f MR |
2951 | |
2952 | This function removes the buffer denoted by BUFFER-OR-NAME from | |
2953 | all window-local buffer lists." | |
5386012d | 2954 | (let ((buffer (window-normalize-buffer buffer-or-name))) |
9397e56f MR |
2955 | (dolist (window (window-list-1 nil nil t)) |
2956 | (if (eq (window-buffer window) buffer) | |
0e2070b5 MR |
2957 | (unless (window--delete window t t) |
2958 | ;; Switch to another buffer in window. | |
2959 | (set-window-dedicated-p window nil) | |
2960 | (switch-to-prev-buffer window 'kill)) | |
9397e56f MR |
2961 | ;; Unrecord BUFFER in WINDOW. |
2962 | (unrecord-window-buffer window buffer))))) | |
2963 | ||
1ed43b09 CY |
2964 | (defun quit-window (&optional kill window) |
2965 | "Quit WINDOW and bury its buffer. | |
cf4eacfd MR |
2966 | WINDOW must be a live window and defaults to the selected one. |
2967 | With prefix argument KILL non-nil, kill the buffer instead of | |
2968 | burying it. | |
9397e56f MR |
2969 | |
2970 | According to information stored in WINDOW's `quit-restore' window | |
2971 | parameter either \(1) delete WINDOW and its frame, \(2) delete | |
2972 | WINDOW, \(3) restore the buffer previously displayed in WINDOW, | |
2973 | or \(4) make WINDOW display some other buffer than the present | |
1ed43b09 CY |
2974 | one. If non-nil, reset `quit-restore' parameter to nil." |
2975 | (interactive "P") | |
5386012d | 2976 | (setq window (window-normalize-live-window window)) |
cf4eacfd MR |
2977 | (let* ((buffer (window-buffer window)) |
2978 | (quit-restore (window-parameter window 'quit-restore)) | |
2979 | (prev-buffer | |
2980 | (let* ((prev-buffers (window-prev-buffers window)) | |
2981 | (prev-buffer (caar prev-buffers))) | |
2982 | (and (or (not (eq prev-buffer buffer)) | |
2983 | (and (cdr prev-buffers) | |
2984 | (not (eq (setq prev-buffer (cadr prev-buffers)) | |
2985 | buffer)))) | |
2986 | prev-buffer))) | |
2987 | quad resize) | |
9397e56f | 2988 | (cond |
cf4eacfd | 2989 | ((and (not prev-buffer) |
0e2070b5 MR |
2990 | (memq (nth 1 quit-restore) '(window frame)) |
2991 | (eq (nth 3 quit-restore) buffer) | |
2992 | ;; Delete WINDOW if possible. | |
2993 | (window--delete window nil kill)) | |
9397e56f MR |
2994 | ;; If the previously selected window is still alive, select it. |
2995 | (when (window-live-p (nth 2 quit-restore)) | |
2996 | (select-window (nth 2 quit-restore)))) | |
cf4eacfd MR |
2997 | ((and (listp (setq quad (nth 1 quit-restore))) |
2998 | (buffer-live-p (car quad)) | |
2999 | (eq (nth 3 quit-restore) buffer)) | |
3000 | ;; Show another buffer stored in quit-restore parameter. | |
3001 | (setq resize (with-current-buffer buffer | |
3002 | (and temp-buffer-resize-mode | |
3003 | (/= (nth 3 quad) (window-total-size window))))) | |
9397e56f | 3004 | (set-window-dedicated-p window nil) |
cf4eacfd MR |
3005 | (when resize |
3006 | ;; Try to resize WINDOW to its old height but don't signal an | |
3007 | ;; error. | |
3008 | (condition-case nil | |
3009 | (window-resize window (- (nth 3 quad) (window-total-size window))) | |
3010 | (error nil))) | |
1885e5b8 | 3011 | ;; Restore WINDOW's previous buffer, start and point position. |
cf4eacfd MR |
3012 | (set-window-buffer-start-and-point |
3013 | window (nth 0 quad) (nth 1 quad) (nth 2 quad)) | |
1885e5b8 MR |
3014 | ;; Unrecord WINDOW's buffer here (Bug#9937) to make sure it's not |
3015 | ;; re-recorded by `set-window-buffer'. | |
3016 | (unrecord-window-buffer window buffer) | |
9397e56f MR |
3017 | ;; Reset the quit-restore parameter. |
3018 | (set-window-parameter window 'quit-restore nil) | |
cf4eacfd MR |
3019 | ;; Select old window. |
3020 | (when (window-live-p (nth 2 quit-restore)) | |
3021 | (select-window (nth 2 quit-restore)))) | |
9397e56f | 3022 | (t |
cf4eacfd MR |
3023 | ;; Show some other buffer in WINDOW and reset the quit-restore |
3024 | ;; parameter. | |
9397e56f | 3025 | (set-window-parameter window 'quit-restore nil) |
b4d72fcf MR |
3026 | ;; Make sure that WINDOW is no more dedicated. |
3027 | (set-window-dedicated-p window nil) | |
9397e56f MR |
3028 | (switch-to-prev-buffer window 'bury-or-kill))) |
3029 | ||
3030 | ;; Kill WINDOW's old-buffer if requested | |
e4ed06f1 CY |
3031 | (if kill |
3032 | (kill-buffer buffer) | |
3033 | (bury-buffer-internal buffer)))) | |
366ca7f3 MR |
3034 | |
3035 | (defun quit-windows-on (&optional buffer-or-name kill frame) | |
3036 | "Quit all windows showing BUFFER-OR-NAME. | |
3037 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer | |
3038 | and defaults to the current buffer. Optional argument KILL | |
3039 | non-nil means to kill BUFFER-OR-NAME. KILL nil means to bury | |
3040 | BUFFER-OR-NAME. Optional argument FRAME is handled as by | |
3041 | `delete-windows-on'. | |
3042 | ||
3043 | This function calls `quit-window' on all candidate windows | |
3044 | showing BUFFER-OR-NAME." | |
3045 | (interactive "BQuit windows on (buffer):\nP") | |
3046 | (let ((buffer (window-normalize-buffer buffer-or-name)) | |
3047 | ;; Handle the "inverted" meaning of the FRAME argument wrt other | |
3048 | ;; `window-list-1' based function. | |
3049 | (all-frames (cond ((not frame) t) ((eq frame t) nil) (t frame)))) | |
3050 | (dolist (window (window-list-1 nil nil all-frames)) | |
3051 | (if (eq (window-buffer window) buffer) | |
3052 | (quit-window kill window) | |
3053 | ;; If a window doesn't show BUFFER, unrecord BUFFER in it. | |
3054 | (unrecord-window-buffer window buffer))))) | |
562dd5e9 MR |
3055 | \f |
3056 | ;;; Splitting windows. | |
3057 | (defsubst window-split-min-size (&optional horizontal) | |
3058 | "Return minimum height of any window when splitting windows. | |
3059 | Optional argument HORIZONTAL non-nil means return minimum width." | |
3060 | (if horizontal | |
3061 | (max window-min-width window-safe-min-width) | |
3062 | (max window-min-height window-safe-min-height))) | |
3063 | ||
3064 | (defun split-window (&optional window size side) | |
3065 | "Make a new window adjacent to WINDOW. | |
3066 | WINDOW can be any window and defaults to the selected one. | |
3067 | Return the new window which is always a live window. | |
3068 | ||
3069 | Optional argument SIZE a positive number means make WINDOW SIZE | |
3070 | lines or columns tall. If SIZE is negative, make the new window | |
3071 | -SIZE lines or columns tall. If and only if SIZE is non-nil, its | |
3072 | absolute value can be less than `window-min-height' or | |
3073 | `window-min-width'; so this command can make a new window as | |
3074 | small as one line or two columns. SIZE defaults to half of | |
3075 | WINDOW's size. Interactively, SIZE is the prefix argument. | |
3076 | ||
3077 | Optional third argument SIDE nil (or `below') specifies that the | |
3078 | new window shall be located below WINDOW. SIDE `above' means the | |
3079 | new window shall be located above WINDOW. In both cases SIZE | |
3080 | specifies the new number of lines for WINDOW \(or the new window | |
3081 | if SIZE is negative) including space reserved for the mode and/or | |
3082 | header line. | |
3083 | ||
3084 | SIDE t (or `right') specifies that the new window shall be | |
3085 | located on the right side of WINDOW. SIDE `left' means the new | |
3086 | window shall be located on the left of WINDOW. In both cases | |
3087 | SIZE specifies the new number of columns for WINDOW \(or the new | |
3088 | window provided SIZE is negative) including space reserved for | |
3089 | fringes and the scrollbar or a divider column. Any other non-nil | |
3090 | value for SIDE is currently handled like t (or `right'). | |
3091 | ||
3092 | If the variable `ignore-window-parameters' is non-nil or the | |
3093 | `split-window' parameter of WINDOW equals t, do not process any | |
3094 | parameters of WINDOW. Otherwise, if the `split-window' parameter | |
3095 | of WINDOW specifies a function, call that function with all three | |
3096 | arguments and return the value returned by that function. | |
3097 | ||
3098 | Otherwise, if WINDOW is part of an atomic window, \"split\" the | |
3099 | root of that atomic window. The new window does not become a | |
3100 | member of that atomic window. | |
3101 | ||
3102 | If WINDOW is live, properties of the new window like margins and | |
3103 | scrollbars are inherited from WINDOW. If WINDOW is an internal | |
3104 | window, these properties as well as the buffer displayed in the | |
3105 | new window are inherited from the window selected on WINDOW's | |
3106 | frame. The selected window is not changed by this function." | |
3107 | (interactive "i") | |
5386012d | 3108 | (setq window (window-normalize-any-window window)) |
130e3e11 MR |
3109 | (let* ((side (cond |
3110 | ((not side) 'below) | |
3111 | ((memq side '(below above right left)) side) | |
3112 | (t 'right))) | |
3113 | (horizontal (not (memq side '(nil below above)))) | |
562dd5e9 MR |
3114 | (frame (window-frame window)) |
3115 | (parent (window-parent window)) | |
3116 | (function (window-parameter window 'split-window)) | |
3117 | (window-side (window-parameter window 'window-side)) | |
3118 | ;; Rebind `window-nest' since in some cases we may have to | |
3119 | ;; override its value. | |
3120 | (window-nest window-nest) | |
3121 | atom-root) | |
3122 | ||
3123 | (window-check frame) | |
3124 | (catch 'done | |
3125 | (cond | |
3126 | ;; Ignore window parameters if either `ignore-window-parameters' | |
3127 | ;; is t or the `split-window' parameter equals t. | |
3128 | ((or ignore-window-parameters (eq function t))) | |
3129 | ((functionp function) | |
3130 | ;; The `split-window' parameter specifies the function to call. | |
3131 | ;; If that function is `ignore', do nothing. | |
3132 | (throw 'done (funcall function window size side))) | |
3133 | ;; If WINDOW is a subwindow of an atomic window, split the root | |
3134 | ;; window of that atomic window instead. | |
3135 | ((and (window-parameter window 'window-atom) | |
3136 | (setq atom-root (window-atom-root window)) | |
3137 | (not (eq atom-root window))) | |
3138 | (throw 'done (split-window atom-root size side)))) | |
3139 | ||
3140 | (when (and window-side | |
3141 | (or (not parent) | |
3142 | (not (window-parameter parent 'window-side)))) | |
3143 | ;; WINDOW is a side root window. To make sure that a new parent | |
3144 | ;; window gets created set `window-nest' to t. | |
3145 | (setq window-nest t)) | |
3146 | ||
3147 | (when (and window-splits size (> size 0)) | |
3148 | ;; If `window-splits' is non-nil and SIZE is a non-negative | |
3149 | ;; integer, we cannot reasonably resize other windows. Rather | |
3150 | ;; bind `window-nest' to t to make sure that subsequent window | |
3151 | ;; deletions are handled correctly. | |
3152 | (setq window-nest t)) | |
3153 | ||
3154 | (let* ((parent-size | |
3155 | ;; `parent-size' is the size of WINDOW's parent, provided | |
3156 | ;; it has one. | |
3157 | (when parent (window-total-size parent horizontal))) | |
3158 | ;; `resize' non-nil means we are supposed to resize other | |
3159 | ;; windows in WINDOW's combination. | |
3160 | (resize | |
3161 | (and window-splits (not window-nest) | |
3162 | ;; Resize makes sense in iso-combinations only. | |
3d8daefe | 3163 | (window-combined-p window horizontal))) |
562dd5e9 MR |
3164 | ;; `old-size' is the current size of WINDOW. |
3165 | (old-size (window-total-size window horizontal)) | |
3166 | ;; `new-size' is the specified or calculated size of the | |
3167 | ;; new window. | |
3168 | (new-size | |
3169 | (cond | |
3170 | ((not size) | |
3171 | (max (window-split-min-size horizontal) | |
3172 | (if resize | |
3173 | ;; When resizing try to give the new window the | |
3174 | ;; average size of a window in its combination. | |
3175 | (min (- parent-size | |
3176 | (window-min-size parent horizontal)) | |
3177 | (/ parent-size | |
3d8daefe | 3178 | (1+ (window-combinations |
562dd5e9 MR |
3179 | parent horizontal)))) |
3180 | ;; Else try to give the new window half the size | |
3181 | ;; of WINDOW (plus an eventual odd line). | |
3182 | (+ (/ old-size 2) (% old-size 2))))) | |
3183 | ((>= size 0) | |
3184 | ;; SIZE non-negative specifies the new size of WINDOW. | |
3185 | ||
3186 | ;; Note: Specifying a non-negative SIZE is practically | |
3187 | ;; always done as workaround for making the new window | |
3188 | ;; appear above or on the left of the new window (the | |
3189 | ;; ispell window is a typical example of that). In all | |
3190 | ;; these cases the SIDE argument should be set to 'above | |
3191 | ;; or 'left in order to support the 'resize option. | |
3192 | ;; Here we have to nest the windows instead, see above. | |
3193 | (- old-size size)) | |
3194 | (t | |
3195 | ;; SIZE negative specifies the size of the new window. | |
3196 | (- size)))) | |
3197 | new-parent new-normal) | |
3198 | ||
3199 | ;; Check SIZE. | |
3200 | (cond | |
3201 | ((not size) | |
3202 | (cond | |
3203 | (resize | |
3204 | ;; SIZE unspecified, resizing. | |
3205 | (when (and (not (window-sizable-p parent (- new-size) horizontal)) | |
3206 | ;; Try again with minimum split size. | |
3207 | (setq new-size | |
3208 | (max new-size (window-split-min-size horizontal))) | |
3209 | (not (window-sizable-p parent (- new-size) horizontal))) | |
3210 | (error "Window %s too small for splitting" parent))) | |
3211 | ((> (+ new-size (window-min-size window horizontal)) old-size) | |
3212 | ;; SIZE unspecified, no resizing. | |
3213 | (error "Window %s too small for splitting" window)))) | |
3214 | ((and (>= size 0) | |
3215 | (or (>= size old-size) | |
3216 | (< new-size (if horizontal | |
3217 | window-safe-min-width | |
3218 | window-safe-min-width)))) | |
3219 | ;; SIZE specified as new size of old window. If the new size | |
3220 | ;; is larger than the old size or the size of the new window | |
3221 | ;; would be less than the safe minimum, signal an error. | |
3222 | (error "Window %s too small for splitting" window)) | |
3223 | (resize | |
3224 | ;; SIZE specified, resizing. | |
3225 | (unless (window-sizable-p parent (- new-size) horizontal) | |
3226 | ;; If we cannot resize the parent give up. | |
3227 | (error "Window %s too small for splitting" parent))) | |
3228 | ((or (< new-size | |
3229 | (if horizontal window-safe-min-width window-safe-min-height)) | |
3230 | (< (- old-size new-size) | |
3231 | (if horizontal window-safe-min-width window-safe-min-height))) | |
3232 | ;; SIZE specification violates minimum size restrictions. | |
3233 | (error "Window %s too small for splitting" window))) | |
3234 | ||
5386012d | 3235 | (window--resize-reset frame horizontal) |
562dd5e9 MR |
3236 | |
3237 | (setq new-parent | |
3238 | ;; Make new-parent non-nil if we need a new parent window; | |
3239 | ;; either because we want to nest or because WINDOW is not | |
3240 | ;; iso-combined. | |
3d8daefe | 3241 | (or window-nest (not (window-combined-p window horizontal)))) |
562dd5e9 MR |
3242 | (setq new-normal |
3243 | ;; Make new-normal the normal size of the new window. | |
3244 | (cond | |
3245 | (size (/ (float new-size) (if new-parent old-size parent-size))) | |
3246 | (new-parent 0.5) | |
3d8daefe | 3247 | (resize (/ 1.0 (1+ (window-combinations parent horizontal)))) |
562dd5e9 MR |
3248 | (t (/ (window-normal-size window horizontal) 2.0)))) |
3249 | ||
3250 | (if resize | |
3251 | ;; Try to get space from OLD's siblings. We could go "up" and | |
3252 | ;; try getting additional space from surrounding windows but | |
3253 | ;; we won't be able to return space to those windows when we | |
3254 | ;; delete the one we create here. Hence we do not go up. | |
3255 | (progn | |
5386012d | 3256 | (window--resize-subwindows parent (- new-size) horizontal) |
562dd5e9 MR |
3257 | (let* ((normal (- 1.0 new-normal)) |
3258 | (sub (window-child parent))) | |
3259 | (while sub | |
3260 | (set-window-new-normal | |
3261 | sub (* (window-normal-size sub horizontal) normal)) | |
3262 | (setq sub (window-right sub))))) | |
3263 | ;; Get entire space from WINDOW. | |
3264 | (set-window-new-total window (- old-size new-size)) | |
5386012d | 3265 | (window--resize-this-window window (- new-size) horizontal) |
562dd5e9 MR |
3266 | (set-window-new-normal |
3267 | window (- (if new-parent 1.0 (window-normal-size window horizontal)) | |
3268 | new-normal))) | |
3269 | ||
3270 | (let* ((new (split-window-internal window new-size side new-normal))) | |
3271 | ;; Inherit window-side parameters, if any. | |
3272 | (when (and window-side new-parent) | |
3273 | (set-window-parameter (window-parent new) 'window-side window-side) | |
3274 | (set-window-parameter new 'window-side window-side)) | |
3275 | ||
3276 | (run-window-configuration-change-hook frame) | |
3277 | (window-check frame) | |
3278 | ;; Always return the new window. | |
3279 | new))))) | |
3280 | ||
3281 | ;; I think this should be the default; I think people will prefer it--rms. | |
3282 | (defcustom split-window-keep-point t | |
2d197ffb CY |
3283 | "If non-nil, \\[split-window-below] preserves point in the new window. |
3284 | If nil, adjust point in the two windows to minimize redisplay. | |
3285 | This option applies only to `split-window-below' and functions | |
3286 | that call it. The low-level `split-window' function always keeps | |
3287 | the original point in both windows." | |
562dd5e9 MR |
3288 | :type 'boolean |
3289 | :group 'windows) | |
3290 | ||
2d197ffb CY |
3291 | (defun split-window-below (&optional size) |
3292 | "Split the selected window into two windows, one above the other. | |
3293 | The selected window is above. The newly split-off window is | |
3294 | below, and displays the same buffer. Return the new window. | |
3295 | ||
3296 | If optional argument SIZE is omitted or nil, both windows get the | |
3297 | same height, or close to it. If SIZE is positive, the upper | |
3298 | \(selected) window gets SIZE lines. If SIZE is negative, the | |
3299 | lower (new) window gets -SIZE lines. | |
3300 | ||
3301 | If the variable `split-window-keep-point' is non-nil, both | |
3302 | windows get the same value of point as the selected window. | |
3303 | Otherwise, the window starts are chosen so as to minimize the | |
3304 | amount of redisplay; this is convenient on slow terminals." | |
562dd5e9 MR |
3305 | (interactive "P") |
3306 | (let ((old-window (selected-window)) | |
3307 | (old-point (point)) | |
3308 | (size (and size (prefix-numeric-value size))) | |
3309 | moved-by-window-height moved new-window bottom) | |
3310 | (when (and size (< size 0) (< (- size) window-min-height)) | |
3311 | ;; `split-window' would not signal an error here. | |
3312 | (error "Size of new window too small")) | |
3313 | (setq new-window (split-window nil size)) | |
3314 | (unless split-window-keep-point | |
3315 | (with-current-buffer (window-buffer) | |
3316 | (goto-char (window-start)) | |
3317 | (setq moved (vertical-motion (window-height))) | |
3318 | (set-window-start new-window (point)) | |
3319 | (when (> (point) (window-point new-window)) | |
3320 | (set-window-point new-window (point))) | |
3321 | (when (= moved (window-height)) | |
3322 | (setq moved-by-window-height t) | |
3323 | (vertical-motion -1)) | |
3324 | (setq bottom (point))) | |
3325 | (and moved-by-window-height | |
3326 | (<= bottom (point)) | |
3327 | (set-window-point old-window (1- bottom))) | |
3328 | (and moved-by-window-height | |
3329 | (<= (window-start new-window) old-point) | |
3330 | (set-window-point new-window old-point) | |
3331 | (select-window new-window))) | |
9397e56f MR |
3332 | ;; Always copy quit-restore parameter in interactive use. |
3333 | (let ((quit-restore (window-parameter old-window 'quit-restore))) | |
3334 | (when quit-restore | |
3335 | (set-window-parameter new-window 'quit-restore quit-restore))) | |
3336 | new-window)) | |
562dd5e9 | 3337 | |
2d197ffb | 3338 | (defalias 'split-window-vertically 'split-window-below) |
562dd5e9 | 3339 | |
2d197ffb CY |
3340 | (defun split-window-right (&optional size) |
3341 | "Split the selected window into two side-by-side windows. | |
3342 | The selected window is on the left. The newly split-off window | |
3343 | is on the right, and displays the same buffer. Return the new | |
3344 | window. | |
562dd5e9 | 3345 | |
2d197ffb CY |
3346 | If optional argument SIZE is omitted or nil, both windows get the |
3347 | same width, or close to it. If SIZE is positive, the left-hand | |
3348 | \(selected) window gets SIZE columns. If SIZE is negative, the | |
3349 | right-hand (new) window gets -SIZE columns. Here, SIZE includes | |
3350 | the width of the window's scroll bar; if there are no scroll | |
3351 | bars, it includes the width of the divider column to the window's | |
3352 | right, if any." | |
562dd5e9 MR |
3353 | (interactive "P") |
3354 | (let ((old-window (selected-window)) | |
3355 | (size (and size (prefix-numeric-value size))) | |
3356 | new-window) | |
3357 | (when (and size (< size 0) (< (- size) window-min-width)) | |
3358 | ;; `split-window' would not signal an error here. | |
3359 | (error "Size of new window too small")) | |
9397e56f MR |
3360 | (setq new-window (split-window nil size t)) |
3361 | ;; Always copy quit-restore parameter in interactive use. | |
3362 | (let ((quit-restore (window-parameter old-window 'quit-restore))) | |
3363 | (when quit-restore | |
3364 | (set-window-parameter new-window 'quit-restore quit-restore))) | |
3365 | new-window)) | |
562dd5e9 | 3366 | |
2d197ffb | 3367 | (defalias 'split-window-horizontally 'split-window-right) |
562dd5e9 | 3368 | \f |
6198ccd0 MR |
3369 | ;;; Balancing windows. |
3370 | ||
3371 | ;; The following routine uses the recycled code from an old version of | |
5386012d MR |
3372 | ;; `window--resize-subwindows'. It's not very pretty, but coding it the way the |
3373 | ;; new `window--resize-subwindows' code does would hardly make it any shorter or | |
6198ccd0 MR |
3374 | ;; more readable (FWIW we'd need three loops - one to calculate the |
3375 | ;; minimum sizes per window, one to enlarge or shrink windows until the | |
3376 | ;; new parent-size matches, and one where we shrink the largest/enlarge | |
3377 | ;; the smallest window). | |
3378 | (defun balance-windows-2 (window horizontal) | |
3379 | "Subroutine of `balance-windows-1'. | |
3d8daefe MR |
3380 | WINDOW must be a vertical combination (horizontal if HORIZONTAL |
3381 | is non-nil." | |
6198ccd0 MR |
3382 | (let* ((first (window-child window)) |
3383 | (sub first) | |
3384 | (number-of-children 0) | |
3385 | (parent-size (window-new-total window)) | |
3386 | (total-sum parent-size) | |
3387 | found failed size sub-total sub-delta sub-amount rest) | |
3388 | (while sub | |
3389 | (setq number-of-children (1+ number-of-children)) | |
3390 | (when (window-size-fixed-p sub horizontal) | |
3391 | (setq total-sum | |
3392 | (- total-sum (window-total-size sub horizontal))) | |
3393 | (set-window-new-normal sub 'ignore)) | |
3394 | (setq sub (window-right sub))) | |
3c448ab6 | 3395 | |
6198ccd0 MR |
3396 | (setq failed t) |
3397 | (while (and failed (> number-of-children 0)) | |
3398 | (setq size (/ total-sum number-of-children)) | |
3399 | (setq failed nil) | |
3400 | (setq sub first) | |
3401 | (while (and sub (not failed)) | |
3402 | ;; Ignore subwindows that should be ignored or are stuck. | |
5386012d | 3403 | (unless (window--resize-subwindows-skip-p sub) |
6198ccd0 MR |
3404 | (setq found t) |
3405 | (setq sub-total (window-total-size sub horizontal)) | |
3406 | (setq sub-delta (- size sub-total)) | |
3407 | (setq sub-amount | |
3408 | (window-sizable sub sub-delta horizontal)) | |
3409 | ;; Register the new total size for this subwindow. | |
3410 | (set-window-new-total sub (+ sub-total sub-amount)) | |
3411 | (unless (= sub-amount sub-delta) | |
3412 | (setq total-sum (- total-sum sub-total sub-amount)) | |
3413 | (setq number-of-children (1- number-of-children)) | |
3414 | ;; We failed and need a new round. | |
3415 | (setq failed t) | |
3416 | (set-window-new-normal sub 'skip))) | |
3417 | (setq sub (window-right sub)))) | |
3c448ab6 | 3418 | |
6198ccd0 MR |
3419 | (setq rest (% total-sum number-of-children)) |
3420 | ;; Fix rounding by trying to enlarge non-stuck windows by one line | |
3421 | ;; (column) until `rest' is zero. | |
3422 | (setq sub first) | |
3423 | (while (and sub (> rest 0)) | |
5386012d | 3424 | (unless (window--resize-subwindows-skip-p window) |
6198ccd0 MR |
3425 | (set-window-new-total sub 1 t) |
3426 | (setq rest (1- rest))) | |
3427 | (setq sub (window-right sub))) | |
3c448ab6 | 3428 | |
6198ccd0 MR |
3429 | ;; Fix rounding by trying to enlarge stuck windows by one line |
3430 | ;; (column) until `rest' equals zero. | |
3431 | (setq sub first) | |
3432 | (while (and sub (> rest 0)) | |
3433 | (unless (eq (window-new-normal sub) 'ignore) | |
3434 | (set-window-new-total sub 1 t) | |
3435 | (setq rest (1- rest))) | |
3436 | (setq sub (window-right sub))) | |
3437 | ||
3438 | (setq sub first) | |
3439 | (while sub | |
3440 | ;; Record new normal sizes. | |
3441 | (set-window-new-normal | |
3442 | sub (/ (if (eq (window-new-normal sub) 'ignore) | |
3443 | (window-total-size sub horizontal) | |
3444 | (window-new-total sub)) | |
3445 | (float parent-size))) | |
3446 | ;; Recursively balance each subwindow's subwindows. | |
3447 | (balance-windows-1 sub horizontal) | |
3448 | (setq sub (window-right sub))))) | |
3449 | ||
3450 | (defun balance-windows-1 (window &optional horizontal) | |
3451 | "Subroutine of `balance-windows'." | |
3452 | (if (window-child window) | |
3453 | (let ((sub (window-child window))) | |
3d8daefe | 3454 | (if (window-combined-p sub horizontal) |
6198ccd0 MR |
3455 | (balance-windows-2 window horizontal) |
3456 | (let ((size (window-new-total window))) | |
3457 | (while sub | |
9173deec | 3458 | (set-window-new-total sub size) |
6198ccd0 MR |
3459 | (balance-windows-1 sub horizontal) |
3460 | (setq sub (window-right sub)))))))) | |
3461 | ||
3462 | (defun balance-windows (&optional window-or-frame) | |
3463 | "Balance the sizes of subwindows of WINDOW-OR-FRAME. | |
3464 | WINDOW-OR-FRAME is optional and defaults to the selected frame. | |
3465 | If WINDOW-OR-FRAME denotes a frame, balance the sizes of all | |
3466 | subwindows of that frame's root window. If WINDOW-OR-FRAME | |
3467 | denots a window, balance the sizes of all subwindows of that | |
3468 | window." | |
3469 | (interactive) | |
3470 | (let* ((window | |
3471 | (cond | |
3472 | ((or (not window-or-frame) | |
3473 | (frame-live-p window-or-frame)) | |
3474 | (frame-root-window window-or-frame)) | |
3475 | ((or (window-live-p window-or-frame) | |
3476 | (window-child window-or-frame)) | |
3477 | window-or-frame) | |
3478 | (t | |
3479 | (error "Not a window or frame %s" window-or-frame)))) | |
3480 | (frame (window-frame window))) | |
3481 | ;; Balance vertically. | |
5386012d | 3482 | (window--resize-reset (window-frame window)) |
6198ccd0 | 3483 | (balance-windows-1 window) |
d615d6d2 | 3484 | (window-resize-apply frame) |
6198ccd0 | 3485 | ;; Balance horizontally. |
5386012d | 3486 | (window--resize-reset (window-frame window) t) |
6198ccd0 | 3487 | (balance-windows-1 window t) |
d615d6d2 | 3488 | (window-resize-apply frame t))) |
3c448ab6 MR |
3489 | |
3490 | (defun window-fixed-size-p (&optional window direction) | |
3491 | "Return t if WINDOW cannot be resized in DIRECTION. | |
3492 | WINDOW defaults to the selected window. DIRECTION can be | |
3493 | nil (i.e. any), `height' or `width'." | |
3494 | (with-current-buffer (window-buffer window) | |
3495 | (when (and (boundp 'window-size-fixed) window-size-fixed) | |
3496 | (not (and direction | |
3497 | (member (cons direction window-size-fixed) | |
3498 | '((height . width) (width . height)))))))) | |
3499 | ||
3500 | ;;; A different solution to balance-windows. | |
3c448ab6 MR |
3501 | (defvar window-area-factor 1 |
3502 | "Factor by which the window area should be over-estimated. | |
3503 | This is used by `balance-windows-area'. | |
3504 | Changing this globally has no effect.") | |
3505 | (make-variable-buffer-local 'window-area-factor) | |
3506 | ||
6198ccd0 | 3507 | (defun balance-windows-area-adjust (window delta horizontal) |
d615d6d2 | 3508 | "Wrapper around `window-resize' with error checking. |
6198ccd0 | 3509 | Arguments WINDOW, DELTA and HORIZONTAL are passed on to that function." |
d615d6d2 | 3510 | ;; `window-resize' may fail if delta is too large. |
6198ccd0 MR |
3511 | (while (>= (abs delta) 1) |
3512 | (condition-case nil | |
3513 | (progn | |
d615d6d2 | 3514 | (window-resize window delta horizontal) |
6198ccd0 MR |
3515 | (setq delta 0)) |
3516 | (error | |
3517 | ;;(message "adjust: %s" (error-message-string err)) | |
3518 | (setq delta (/ delta 2)))))) | |
3519 | ||
3c448ab6 MR |
3520 | (defun balance-windows-area () |
3521 | "Make all visible windows the same area (approximately). | |
3522 | See also `window-area-factor' to change the relative size of | |
3523 | specific buffers." | |
3524 | (interactive) | |
3525 | (let* ((unchanged 0) (carry 0) (round 0) | |
3526 | ;; Remove fixed-size windows. | |
3527 | (wins (delq nil (mapcar (lambda (win) | |
3528 | (if (not (window-fixed-size-p win)) win)) | |
3529 | (window-list nil 'nomini)))) | |
3530 | (changelog nil) | |
3531 | next) | |
3532 | ;; Resizing a window changes the size of surrounding windows in complex | |
3533 | ;; ways, so it's difficult to balance them all. The introduction of | |
3534 | ;; `adjust-window-trailing-edge' made it a bit easier, but it is still | |
3535 | ;; very difficult to do. `balance-window' above takes an off-line | |
3536 | ;; approach: get the whole window tree, then balance it, then try to | |
3537 | ;; adjust the windows so they fit the result. | |
3538 | ;; Here, instead, we take a "local optimization" approach, where we just | |
3539 | ;; go through all the windows several times until nothing needs to be | |
3540 | ;; changed. The main problem with this approach is that it's difficult | |
3541 | ;; to make sure it terminates, so we use some heuristic to try and break | |
3542 | ;; off infinite loops. | |
3543 | ;; After a round without any change, we allow a second, to give a chance | |
3544 | ;; to the carry to propagate a minor imbalance from the end back to | |
3545 | ;; the beginning. | |
3546 | (while (< unchanged 2) | |
3547 | ;; (message "New round") | |
3548 | (setq unchanged (1+ unchanged) round (1+ round)) | |
3549 | (dolist (win wins) | |
3550 | (setq next win) | |
3551 | (while (progn (setq next (next-window next)) | |
3552 | (window-fixed-size-p next))) | |
3553 | ;; (assert (eq next (or (cadr (member win wins)) (car wins)))) | |
3554 | (let* ((horiz | |
3555 | (< (car (window-edges win)) (car (window-edges next)))) | |
3556 | (areadiff (/ (- (* (window-height next) (window-width next) | |
3557 | (buffer-local-value 'window-area-factor | |
3558 | (window-buffer next))) | |
3559 | (* (window-height win) (window-width win) | |
3560 | (buffer-local-value 'window-area-factor | |
3561 | (window-buffer win)))) | |
3562 | (max (buffer-local-value 'window-area-factor | |
3563 | (window-buffer win)) | |
3564 | (buffer-local-value 'window-area-factor | |
3565 | (window-buffer next))))) | |
3566 | (edgesize (if horiz | |
3567 | (+ (window-height win) (window-height next)) | |
3568 | (+ (window-width win) (window-width next)))) | |
3569 | (diff (/ areadiff edgesize))) | |
3570 | (when (zerop diff) | |
3571 | ;; Maybe diff is actually closer to 1 than to 0. | |
3572 | (setq diff (/ (* 3 areadiff) (* 2 edgesize)))) | |
3573 | (when (and (zerop diff) (not (zerop areadiff))) | |
3574 | (setq diff (/ (+ areadiff carry) edgesize)) | |
3575 | ;; Change things smoothly. | |
3576 | (if (or (> diff 1) (< diff -1)) (setq diff (/ diff 2)))) | |
3577 | (if (zerop diff) | |
3578 | ;; Make sure negligible differences don't accumulate to | |
3579 | ;; become significant. | |
3580 | (setq carry (+ carry areadiff)) | |
6198ccd0 | 3581 | ;; This used `adjust-window-trailing-edge' before and uses |
d615d6d2 | 3582 | ;; `window-resize' now. Error wrapping is still needed. |
6198ccd0 | 3583 | (balance-windows-area-adjust win diff horiz) |
3c448ab6 MR |
3584 | ;; (sit-for 0.5) |
3585 | (let ((change (cons win (window-edges win)))) | |
3586 | ;; If the same change has been seen already for this window, | |
3587 | ;; we're most likely in an endless loop, so don't count it as | |
3588 | ;; a change. | |
3589 | (unless (member change changelog) | |
3590 | (push change changelog) | |
3591 | (setq unchanged 0 carry 0))))))) | |
3592 | ;; We've now basically balanced all the windows. | |
3593 | ;; But there may be some minor off-by-one imbalance left over, | |
3594 | ;; so let's do some fine tuning. | |
3595 | ;; (bw-finetune wins) | |
3596 | ;; (message "Done in %d rounds" round) | |
3597 | )) | |
9d89fec7 MR |
3598 | |
3599 | ;;; Window states, how to get them and how to put them in a window. | |
3600 | (defsubst window-list-no-nils (&rest args) | |
3601 | "Like LIST but do not add nil elements of ARGS." | |
3602 | (delq nil (apply 'list args))) | |
3603 | ||
3604 | (defvar window-state-ignored-parameters '(quit-restore) | |
3605 | "List of window parameters ignored by `window-state-get'.") | |
3606 | ||
3607 | (defun window-state-get-1 (window &optional markers) | |
3608 | "Helper function for `window-state-get'." | |
3609 | (let* ((type | |
3610 | (cond | |
d68443dc MR |
3611 | ((window-top-child window) 'vc) |
3612 | ((window-left-child window) 'hc) | |
9d89fec7 MR |
3613 | (t 'leaf))) |
3614 | (buffer (window-buffer window)) | |
3615 | (selected (eq window (selected-window))) | |
3616 | (head | |
3617 | (window-list-no-nils | |
3618 | type | |
d68443dc | 3619 | (unless (window-next-sibling window) (cons 'last t)) |
9d89fec7 MR |
3620 | (cons 'total-height (window-total-size window)) |
3621 | (cons 'total-width (window-total-size window t)) | |
3622 | (cons 'normal-height (window-normal-size window)) | |
3623 | (cons 'normal-width (window-normal-size window t)) | |
3624 | (cons 'splits (window-splits window)) | |
3625 | (cons 'nest (window-nest window)) | |
3626 | (let (list) | |
3627 | (dolist (parameter (window-parameters window)) | |
3628 | (unless (memq (car parameter) | |
3629 | window-state-ignored-parameters) | |
3630 | (setq list (cons parameter list)))) | |
28545e04 MR |
3631 | (unless (window-parameter window 'clone-of) |
3632 | ;; Make a clone-of parameter. | |
3633 | (setq list (cons (cons 'clone-of window) list))) | |
9d89fec7 MR |
3634 | (when list |
3635 | (cons 'parameters list))) | |
3636 | (when buffer | |
3637 | ;; All buffer related things go in here - make the buffer | |
3638 | ;; current when retrieving `point' and `mark'. | |
3639 | (with-current-buffer (window-buffer window) | |
c96111ea | 3640 | (let ((point (window-point-1 window)) |
9d89fec7 MR |
3641 | (start (window-start window)) |
3642 | (mark (mark))) | |
3643 | (window-list-no-nils | |
3644 | 'buffer (buffer-name buffer) | |
3645 | (cons 'selected selected) | |
3646 | (when window-size-fixed (cons 'size-fixed window-size-fixed)) | |
3647 | (cons 'hscroll (window-hscroll window)) | |
3648 | (cons 'fringes (window-fringes window)) | |
3649 | (cons 'margins (window-margins window)) | |
3650 | (cons 'scroll-bars (window-scroll-bars window)) | |
3651 | (cons 'vscroll (window-vscroll window)) | |
3652 | (cons 'dedicated (window-dedicated-p window)) | |
3653 | (cons 'point (if markers (copy-marker point) point)) | |
3654 | (cons 'start (if markers (copy-marker start) start)) | |
3655 | (when mark | |
3656 | (cons 'mark (if markers (copy-marker mark) mark))))))))) | |
3657 | (tail | |
3658 | (when (memq type '(vc hc)) | |
3659 | (let (list) | |
3660 | (setq window (window-child window)) | |
3661 | (while window | |
3662 | (setq list (cons (window-state-get-1 window markers) list)) | |
3663 | (setq window (window-right window))) | |
3664 | (nreverse list))))) | |
3665 | (append head tail))) | |
3666 | ||
3667 | (defun window-state-get (&optional window markers) | |
3668 | "Return state of WINDOW as a Lisp object. | |
3669 | WINDOW can be any window and defaults to the root window of the | |
3670 | selected frame. | |
3671 | ||
3672 | Optional argument MARKERS non-nil means use markers for sampling | |
3673 | positions like `window-point' or `window-start'. MARKERS should | |
3674 | be non-nil only if the value is used for putting the state back | |
3675 | in the same session (note that markers slow down processing). | |
3676 | ||
3677 | The return value can be used as argument for `window-state-put' | |
3678 | to put the state recorded here into an arbitrary window. The | |
3679 | value can be also stored on disk and read back in a new session." | |
3680 | (setq window | |
3681 | (if window | |
24300f5f | 3682 | (if (window-valid-p window) |
9d89fec7 MR |
3683 | window |
3684 | (error "%s is not a live or internal window" window)) | |
3685 | (frame-root-window))) | |
3686 | ;; The return value is a cons whose car specifies some constraints on | |
3687 | ;; the size of WINDOW. The cdr lists the states of the subwindows of | |
3688 | ;; WINDOW. | |
3689 | (cons | |
3690 | ;; Frame related things would go into a function, say `frame-state', | |
3691 | ;; calling `window-state-get' to insert the frame's root window. | |
3692 | (window-list-no-nils | |
3693 | (cons 'min-height (window-min-size window)) | |
3694 | (cons 'min-width (window-min-size window t)) | |
3695 | (cons 'min-height-ignore (window-min-size window nil t)) | |
3696 | (cons 'min-width-ignore (window-min-size window t t)) | |
3697 | (cons 'min-height-safe (window-min-size window nil 'safe)) | |
3698 | (cons 'min-width-safe (window-min-size window t 'safe)) | |
3699 | ;; These are probably not needed. | |
3700 | (when (window-size-fixed-p window) (cons 'fixed-height t)) | |
3701 | (when (window-size-fixed-p window t) (cons 'fixed-width t))) | |
3702 | (window-state-get-1 window markers))) | |
3703 | ||
3704 | (defvar window-state-put-list nil | |
3705 | "Helper variable for `window-state-put'.") | |
3706 | ||
3707 | (defun window-state-put-1 (state &optional window ignore totals) | |
3708 | "Helper function for `window-state-put'." | |
3709 | (let ((type (car state))) | |
3710 | (setq state (cdr state)) | |
3711 | (cond | |
3712 | ((eq type 'leaf) | |
3713 | ;; For a leaf window just add unprocessed entries to | |
3714 | ;; `window-state-put-list'. | |
3715 | (setq window-state-put-list | |
3716 | (cons (cons window state) window-state-put-list))) | |
3717 | ((memq type '(vc hc)) | |
3718 | (let* ((horizontal (eq type 'hc)) | |
3719 | (total (window-total-size window horizontal)) | |
3720 | (first t) | |
3721 | size new) | |
3722 | (dolist (item state) | |
3723 | ;; Find the next child window. WINDOW always points to the | |
3724 | ;; real window that we want to fill with what we find here. | |
3725 | (when (memq (car item) '(leaf vc hc)) | |
3726 | (if (assq 'last item) | |
3727 | ;; The last child window. Below `window-state-put-1' | |
3728 | ;; will put into it whatever ITEM has in store. | |
3729 | (setq new nil) | |
3730 | ;; Not the last child window, prepare for splitting | |
3731 | ;; WINDOW. SIZE is the new (and final) size of the old | |
3732 | ;; window. | |
3733 | (setq size | |
3734 | (if totals | |
3735 | ;; Use total size. | |
3736 | (cdr (assq (if horizontal 'total-width 'total-height) item)) | |
3737 | ;; Use normalized size and round. | |
3738 | (round (* total | |
3739 | (cdr (assq | |
3740 | (if horizontal 'normal-width 'normal-height) | |
3741 | item)))))) | |
3742 | ||
3743 | ;; Use safe sizes, we try to resize later. | |
3744 | (setq size (max size (if horizontal | |
3745 | window-safe-min-height | |
3746 | window-safe-min-width))) | |
3747 | ||
3748 | (if (window-sizable-p window (- size) horizontal 'safe) | |
3749 | (let* ((window-nest (assq 'nest item))) | |
3750 | ;; We must inherit the nesting, otherwise we might mess | |
3751 | ;; up handling of atomic and side window. | |
3752 | (setq new (split-window window size horizontal))) | |
3753 | ;; Give up if we can't resize window down to safe sizes. | |
3754 | (error "Cannot resize window %s" window)) | |
3755 | ||
3756 | (when first | |
3757 | (setq first nil) | |
3758 | ;; When creating the first child window add for parent | |
3759 | ;; unprocessed entries to `window-state-put-list'. | |
3760 | (setq window-state-put-list | |
3761 | (cons (cons (window-parent window) state) | |
3762 | window-state-put-list)))) | |
3763 | ||
3764 | ;; Now process the current window (either the one we've just | |
3765 | ;; split or the last child of its parent). | |
3766 | (window-state-put-1 item window ignore totals) | |
3767 | ;; Continue with the last window split off. | |
3768 | (setq window new)))))))) | |
3769 | ||
3770 | (defun window-state-put-2 (ignore) | |
3771 | "Helper function for `window-state-put'." | |
3772 | (dolist (item window-state-put-list) | |
3773 | (let ((window (car item)) | |
9d89fec7 MR |
3774 | (splits (cdr (assq 'splits item))) |
3775 | (nest (cdr (assq 'nest item))) | |
3776 | (parameters (cdr (assq 'parameters item))) | |
3777 | (state (cdr (assq 'buffer item)))) | |
9d89fec7 MR |
3778 | (when splits (set-window-splits window splits)) |
3779 | (when nest (set-window-nest window nest)) | |
3780 | ;; Process parameters. | |
3781 | (when parameters | |
3782 | (dolist (parameter parameters) | |
3783 | (set-window-parameter window (car parameter) (cdr parameter)))) | |
3784 | ;; Process buffer related state. | |
3785 | (when state | |
3786 | ;; We don't want to raise an error here so we create a buffer if | |
3787 | ;; there's none. | |
3788 | (set-window-buffer window (get-buffer-create (car state))) | |
3789 | (with-current-buffer (window-buffer window) | |
3790 | (set-window-hscroll window (cdr (assq 'hscroll state))) | |
3791 | (apply 'set-window-fringes | |
3792 | (cons window (cdr (assq 'fringes state)))) | |
3793 | (let ((margins (cdr (assq 'margins state)))) | |
3794 | (set-window-margins window (car margins) (cdr margins))) | |
3795 | (let ((scroll-bars (cdr (assq 'scroll-bars state)))) | |
3796 | (set-window-scroll-bars | |
3797 | window (car scroll-bars) (nth 2 scroll-bars) (nth 3 scroll-bars))) | |
3798 | (set-window-vscroll window (cdr (assq 'vscroll state))) | |
3799 | ;; Adjust vertically. | |
3800 | (if (memq window-size-fixed '(t height)) | |
3801 | ;; A fixed height window, try to restore the original size. | |
3802 | (let ((delta (- (cdr (assq 'total-height item)) | |
3803 | (window-total-height window))) | |
3804 | window-size-fixed) | |
3805 | (when (window-resizable-p window delta) | |
d615d6d2 | 3806 | (window-resize window delta))) |
9d89fec7 MR |
3807 | ;; Else check whether the window is not high enough. |
3808 | (let* ((min-size (window-min-size window nil ignore)) | |
3809 | (delta (- min-size (window-total-size window)))) | |
3810 | (when (and (> delta 0) | |
3811 | (window-resizable-p window delta nil ignore)) | |
d615d6d2 | 3812 | (window-resize window delta nil ignore)))) |
9d89fec7 MR |
3813 | ;; Adjust horizontally. |
3814 | (if (memq window-size-fixed '(t width)) | |
3815 | ;; A fixed width window, try to restore the original size. | |
3816 | (let ((delta (- (cdr (assq 'total-width item)) | |
3817 | (window-total-width window))) | |
3818 | window-size-fixed) | |
3819 | (when (window-resizable-p window delta) | |
d615d6d2 | 3820 | (window-resize window delta))) |
9d89fec7 MR |
3821 | ;; Else check whether the window is not wide enough. |
3822 | (let* ((min-size (window-min-size window t ignore)) | |
3823 | (delta (- min-size (window-total-size window t)))) | |
3824 | (when (and (> delta 0) | |
3825 | (window-resizable-p window delta t ignore)) | |
d615d6d2 | 3826 | (window-resize window delta t ignore)))) |
9d89fec7 MR |
3827 | ;; Set dedicated status. |
3828 | (set-window-dedicated-p window (cdr (assq 'dedicated state))) | |
3829 | ;; Install positions (maybe we should do this after all windows | |
3830 | ;; have been created and sized). | |
3831 | (ignore-errors | |
3832 | (set-window-start window (cdr (assq 'start state))) | |
3833 | (set-window-point window (cdr (assq 'point state))) | |
3834 | ;; I'm not sure whether we should set the mark here, but maybe | |
3835 | ;; it can be used. | |
3836 | (let ((mark (cdr (assq 'mark state)))) | |
3837 | (when mark (set-mark mark)))) | |
3838 | ;; Select window if it's the selected one. | |
3839 | (when (cdr (assq 'selected state)) | |
3840 | (select-window window))))))) | |
3841 | ||
3842 | (defun window-state-put (state &optional window ignore) | |
3843 | "Put window state STATE into WINDOW. | |
3844 | STATE should be the state of a window returned by an earlier | |
3845 | invocation of `window-state-get'. Optional argument WINDOW must | |
3846 | specify a live window and defaults to the selected one. | |
3847 | ||
3848 | Optional argument IGNORE non-nil means ignore minimum window | |
3849 | sizes and fixed size restrictions. IGNORE equal `safe' means | |
3850 | subwindows can get as small as `window-safe-min-height' and | |
3851 | `window-safe-min-width'." | |
5386012d | 3852 | (setq window (window-normalize-live-window window)) |
9d89fec7 MR |
3853 | (let* ((frame (window-frame window)) |
3854 | (head (car state)) | |
3855 | ;; We check here (1) whether the total sizes of root window of | |
3856 | ;; STATE and that of WINDOW are equal so we can avoid | |
3857 | ;; calculating new sizes, and (2) if we do have to resize | |
3858 | ;; whether we can do so without violating size restrictions. | |
3859 | (totals | |
3860 | (and (= (window-total-size window) | |
3861 | (cdr (assq 'total-height state))) | |
3862 | (= (window-total-size window t) | |
3863 | (cdr (assq 'total-width state))))) | |
3864 | (min-height (cdr (assq 'min-height head))) | |
3865 | (min-width (cdr (assq 'min-width head))) | |
3866 | window-splits selected) | |
3867 | (if (and (not totals) | |
3868 | (or (> min-height (window-total-size window)) | |
3869 | (> min-width (window-total-size window t))) | |
3870 | (or (not ignore) | |
3871 | (and (setq min-height | |
3872 | (cdr (assq 'min-height-ignore head))) | |
3873 | (setq min-width | |
3874 | (cdr (assq 'min-width-ignore head))) | |
3875 | (or (> min-height (window-total-size window)) | |
3876 | (> min-width (window-total-size window t))) | |
3877 | (or (not (eq ignore 'safe)) | |
3878 | (and (setq min-height | |
3879 | (cdr (assq 'min-height-safe head))) | |
3880 | (setq min-width | |
3881 | (cdr (assq 'min-width-safe head))) | |
3882 | (or (> min-height | |
3883 | (window-total-size window)) | |
3884 | (> min-width | |
3885 | (window-total-size window t)))))))) | |
3886 | ;; The check above might not catch all errors due to rounding | |
3887 | ;; issues - so IGNORE equal 'safe might not always produce the | |
3888 | ;; minimum possible state. But such configurations hardly make | |
3889 | ;; sense anyway. | |
a91adc7e | 3890 | (error "Window %s too small to accommodate state" window) |
9d89fec7 MR |
3891 | (setq state (cdr state)) |
3892 | (setq window-state-put-list nil) | |
3893 | ;; Work on the windows of a temporary buffer to make sure that | |
3894 | ;; splitting proceeds regardless of any buffer local values of | |
3895 | ;; `window-size-fixed'. Release that buffer after the buffers of | |
3896 | ;; all live windows have been set by `window-state-put-2'. | |
3897 | (with-temp-buffer | |
3898 | (set-window-buffer window (current-buffer)) | |
3899 | (window-state-put-1 state window nil totals) | |
3900 | (window-state-put-2 ignore)) | |
3901 | (window-check frame)))) | |
9481c002 | 3902 | \f |
f818cd2a MR |
3903 | (defun display-buffer-record-window (type window buffer) |
3904 | "Record information for window used by `display-buffer'. | |
cf4eacfd MR |
3905 | TYPE specifies the type of the calling operation and must be one |
3906 | of the symbols 'reuse \(when WINDOW existed already and was | |
3907 | reused for displaying BUFFER), 'window \(when WINDOW was created | |
3908 | on an already existing frame), or 'frame \(when WINDOW was | |
3909 | created on a new frame). WINDOW is the window used for or created | |
3910 | by the `display-buffer' routines. BUFFER is the buffer that | |
3911 | shall be displayed. | |
3912 | ||
3913 | This function installs or updates the quit-restore parameter of | |
3914 | WINDOW. The quit-restore parameter is a list of four elements: | |
3915 | The first element is one of the symbols 'window, 'frame, 'same or | |
3916 | 'other. The second element is either one of the symbols 'window | |
3917 | or 'frame or a list whose elements are the buffer previously | |
3918 | shown in the window, that buffer's window start and window point, | |
3919 | and the window's height. The third element is the window | |
3920 | selected at the time the parameter was created. The fourth | |
3921 | element is BUFFER." | |
f818cd2a | 3922 | (cond |
cf4eacfd MR |
3923 | ((eq type 'reuse) |
3924 | (if (eq (window-buffer window) buffer) | |
3925 | ;; WINDOW shows BUFFER already. | |
3926 | (when (consp (window-parameter window 'quit-restore)) | |
3927 | ;; If WINDOW has a quit-restore parameter, reset its car. | |
3928 | (setcar (window-parameter window 'quit-restore) 'same)) | |
3929 | ;; WINDOW shows another buffer. | |
9481c002 | 3930 | (set-window-parameter |
f818cd2a | 3931 | window 'quit-restore |
cf4eacfd MR |
3932 | (list 'other |
3933 | ;; A quadruple of WINDOW's buffer, start, point and height. | |
3934 | (list (window-buffer window) (window-start window) | |
c96111ea | 3935 | (window-point-1 window) (window-total-size window)) |
cf4eacfd MR |
3936 | (selected-window) buffer)))) |
3937 | ((eq type 'window) | |
3938 | ;; WINDOW has been created on an existing frame. | |
f818cd2a | 3939 | (set-window-parameter |
cf4eacfd MR |
3940 | window 'quit-restore |
3941 | (list 'window 'window (selected-window) buffer))) | |
3942 | ((eq type 'frame) | |
3943 | ;; WINDOW has been created on a new frame. | |
f818cd2a | 3944 | (set-window-parameter |
cf4eacfd MR |
3945 | window 'quit-restore |
3946 | (list 'frame 'frame (selected-window) buffer))))) | |
9481c002 | 3947 | |
f818cd2a MR |
3948 | (defcustom display-buffer-function nil |
3949 | "If non-nil, function to call to handle `display-buffer'. | |
3950 | It will receive two args, the buffer and a flag which if non-nil | |
3951 | means that the currently selected window is not acceptable. It | |
3952 | should choose or create a window, display the specified buffer in | |
3953 | it, and return the window. | |
3954 | ||
f678e0b6 MR |
3955 | The function specified here is responsible for setting the |
3956 | quit-restore and help-setup parameters of the window used." | |
f818cd2a MR |
3957 | :type '(choice |
3958 | (const nil) | |
3959 | (function :tag "function")) | |
3c448ab6 | 3960 | :group 'windows) |
9481c002 | 3961 | |
f818cd2a MR |
3962 | (defcustom pop-up-frame-alist nil |
3963 | "Alist of parameters for automatically generated new frames. | |
3964 | You can set this in your init file; for example, | |
9481c002 | 3965 | |
f818cd2a | 3966 | (setq pop-up-frame-alist '((width . 80) (height . 20))) |
9481c002 | 3967 | |
f818cd2a MR |
3968 | If non-nil, the value you specify here is used by the default |
3969 | `pop-up-frame-function' for the creation of new frames. | |
9481c002 | 3970 | |
f818cd2a MR |
3971 | Since `pop-up-frame-function' is used by `display-buffer' for |
3972 | making new frames, any value specified here by default affects | |
3973 | the automatic generation of new frames via `display-buffer' and | |
3974 | all functions based on it. The behavior of `make-frame' is not | |
3975 | affected by this variable." | |
9481c002 | 3976 | :type '(repeat (cons :format "%v" |
f818cd2a MR |
3977 | (symbol :tag "Parameter") |
3978 | (sexp :tag "Value"))) | |
9481c002 | 3979 | :group 'frames) |
9481c002 | 3980 | |
f818cd2a MR |
3981 | (defcustom pop-up-frame-function |
3982 | (lambda () (make-frame pop-up-frame-alist)) | |
3983 | "Function used by `display-buffer' for creating a new frame. | |
3984 | This function is called with no arguments and should return a new | |
3985 | frame. The default value calls `make-frame' with the argument | |
3986 | `pop-up-frame-alist'." | |
9481c002 | 3987 | :type 'function |
9481c002 | 3988 | :group 'frames) |
3c448ab6 | 3989 | |
56f31926 MR |
3990 | (defcustom special-display-buffer-names nil |
3991 | "List of names of buffers that should be displayed specially. | |
3992 | Displaying a buffer with `display-buffer' or `pop-to-buffer', if | |
3993 | its name is in this list, displays the buffer in a way specified | |
3994 | by `special-display-function'. `special-display-popup-frame' | |
3995 | \(the default for `special-display-function') usually displays | |
3996 | the buffer in a separate frame made with the parameters specified | |
3997 | by `special-display-frame-alist'. If `special-display-function' | |
3998 | has been set to some other function, that function is called with | |
3999 | the buffer as first, and nil as second argument. | |
4000 | ||
4001 | Alternatively, an element of this list can be specified as | |
4002 | \(BUFFER-NAME FRAME-PARAMETERS), where BUFFER-NAME is a buffer | |
4003 | name and FRAME-PARAMETERS an alist of \(PARAMETER . VALUE) pairs. | |
4004 | `special-display-popup-frame' will interpret such pairs as frame | |
4005 | parameters when it creates a special frame, overriding the | |
4006 | corresponding values from `special-display-frame-alist'. | |
4007 | ||
4008 | As a special case, if FRAME-PARAMETERS contains (same-window . t) | |
4009 | `special-display-popup-frame' displays that buffer in the | |
4010 | selected window. If FRAME-PARAMETERS contains (same-frame . t), | |
4011 | it displays that buffer in a window on the selected frame. | |
4012 | ||
4013 | If `special-display-function' specifies some other function than | |
4014 | `special-display-popup-frame', that function is called with the | |
4015 | buffer named BUFFER-NAME as first, and FRAME-PARAMETERS as second | |
4016 | argument. | |
4017 | ||
4018 | Finally, an element of this list can be also specified as | |
4019 | \(BUFFER-NAME FUNCTION OTHER-ARGS). In that case, | |
4020 | `special-display-popup-frame' will call FUNCTION with the buffer | |
4021 | named BUFFER-NAME as first argument, and OTHER-ARGS as the | |
0563dae9 MR |
4022 | second. |
4023 | ||
4024 | Any alternative function specified here is responsible for | |
4025 | setting up the quit-restore parameter of the window used. | |
56f31926 MR |
4026 | |
4027 | If this variable appears \"not to work\", because you added a | |
4028 | name to it but the corresponding buffer is displayed in the | |
4029 | selected window, look at the values of `same-window-buffer-names' | |
4030 | and `same-window-regexps'. Those variables take precedence over | |
4031 | this one. | |
4032 | ||
4033 | See also `special-display-regexps'." | |
4034 | :type '(repeat | |
4035 | (choice :tag "Buffer" | |
4036 | :value "" | |
4037 | (string :format "%v") | |
4038 | (cons :tag "With parameters" | |
4039 | :format "%v" | |
4040 | :value ("" . nil) | |
4041 | (string :format "%v") | |
4042 | (repeat :tag "Parameters" | |
4043 | (cons :format "%v" | |
4044 | (symbol :tag "Parameter") | |
4045 | (sexp :tag "Value")))) | |
4046 | (list :tag "With function" | |
4047 | :format "%v" | |
4048 | :value ("" . nil) | |
4049 | (string :format "%v") | |
4050 | (function :tag "Function") | |
4051 | (repeat :tag "Arguments" (sexp))))) | |
4052 | :group 'windows | |
4053 | :group 'frames) | |
4054 | ||
ac549fa5 GM |
4055 | ;;;###autoload |
4056 | (put 'special-display-buffer-names 'risky-local-variable t) | |
4057 | ||
56f31926 MR |
4058 | (defcustom special-display-regexps nil |
4059 | "List of regexps saying which buffers should be displayed specially. | |
4060 | Displaying a buffer with `display-buffer' or `pop-to-buffer', if | |
4061 | any regexp in this list matches its name, displays it specially | |
4062 | using `special-display-function'. `special-display-popup-frame' | |
4063 | \(the default for `special-display-function') usually displays | |
4064 | the buffer in a separate frame made with the parameters specified | |
4065 | by `special-display-frame-alist'. If `special-display-function' | |
4066 | has been set to some other function, that function is called with | |
4067 | the buffer as first, and nil as second argument. | |
4068 | ||
4069 | Alternatively, an element of this list can be specified as | |
4070 | \(REGEXP FRAME-PARAMETERS), where REGEXP is a regexp as above and | |
4071 | FRAME-PARAMETERS an alist of (PARAMETER . VALUE) pairs. | |
4072 | `special-display-popup-frame' will then interpret these pairs as | |
4073 | frame parameters when creating a special frame for a buffer whose | |
4074 | name matches REGEXP, overriding the corresponding values from | |
4075 | `special-display-frame-alist'. | |
4076 | ||
4077 | As a special case, if FRAME-PARAMETERS contains (same-window . t) | |
4078 | `special-display-popup-frame' displays buffers matching REGEXP in | |
4079 | the selected window. \(same-frame . t) in FRAME-PARAMETERS means | |
4080 | to display such buffers in a window on the selected frame. | |
4081 | ||
4082 | If `special-display-function' specifies some other function than | |
4083 | `special-display-popup-frame', that function is called with the | |
4084 | buffer whose name matched REGEXP as first, and FRAME-PARAMETERS | |
4085 | as second argument. | |
4086 | ||
4087 | Finally, an element of this list can be also specified as | |
4088 | \(REGEXP FUNCTION OTHER-ARGS). `special-display-popup-frame' | |
4089 | will then call FUNCTION with the buffer whose name matched | |
0563dae9 MR |
4090 | REGEXP as first, and OTHER-ARGS as second argument. |
4091 | ||
4092 | Any alternative function specified here is responsible for | |
4093 | setting up the quit-restore parameter of the window used. | |
56f31926 MR |
4094 | |
4095 | If this variable appears \"not to work\", because you added a | |
4096 | name to it but the corresponding buffer is displayed in the | |
4097 | selected window, look at the values of `same-window-buffer-names' | |
4098 | and `same-window-regexps'. Those variables take precedence over | |
4099 | this one. | |
4100 | ||
4101 | See also `special-display-buffer-names'." | |
4102 | :type '(repeat | |
4103 | (choice :tag "Buffer" | |
4104 | :value "" | |
4105 | (regexp :format "%v") | |
4106 | (cons :tag "With parameters" | |
4107 | :format "%v" | |
4108 | :value ("" . nil) | |
4109 | (regexp :format "%v") | |
4110 | (repeat :tag "Parameters" | |
4111 | (cons :format "%v" | |
4112 | (symbol :tag "Parameter") | |
4113 | (sexp :tag "Value")))) | |
4114 | (list :tag "With function" | |
4115 | :format "%v" | |
4116 | :value ("" . nil) | |
4117 | (regexp :format "%v") | |
4118 | (function :tag "Function") | |
4119 | (repeat :tag "Arguments" (sexp))))) | |
4120 | :group 'windows | |
4121 | :group 'frames) | |
4122 | ||
3c448ab6 MR |
4123 | (defun special-display-p (buffer-name) |
4124 | "Return non-nil if a buffer named BUFFER-NAME gets a special frame. | |
56f31926 MR |
4125 | More precisely, return t if `special-display-buffer-names' or |
4126 | `special-display-regexps' contain a string entry equaling or | |
4127 | matching BUFFER-NAME. If `special-display-buffer-names' or | |
4128 | `special-display-regexps' contain a list entry whose car equals | |
4129 | or matches BUFFER-NAME, the return value is the cdr of that | |
4130 | entry." | |
f818cd2a | 4131 | (let (tmp) |
98722073 MR |
4132 | (cond |
4133 | ((not (stringp buffer-name))) | |
f818cd2a | 4134 | ((member buffer-name special-display-buffer-names) |
98722073 | 4135 | t) |
f818cd2a | 4136 | ((setq tmp (assoc buffer-name special-display-buffer-names)) |
98722073 MR |
4137 | (cdr tmp)) |
4138 | ((catch 'found | |
f818cd2a | 4139 | (dolist (regexp special-display-regexps) |
98722073 MR |
4140 | (cond |
4141 | ((stringp regexp) | |
4142 | (when (string-match-p regexp buffer-name) | |
4143 | (throw 'found t))) | |
4144 | ((and (consp regexp) (stringp (car regexp)) | |
4145 | (string-match-p (car regexp) buffer-name)) | |
4146 | (throw 'found (cdr regexp)))))))))) | |
9481c002 | 4147 | |
f818cd2a MR |
4148 | (defcustom special-display-frame-alist |
4149 | '((height . 14) (width . 80) (unsplittable . t)) | |
4150 | "Alist of parameters for special frames. | |
4151 | Special frames are used for buffers whose names are listed in | |
4152 | `special-display-buffer-names' and for buffers whose names match | |
4153 | one of the regular expressions in `special-display-regexps'. | |
9481c002 | 4154 | |
f818cd2a | 4155 | This variable can be set in your init file, like this: |
9481c002 | 4156 | |
f818cd2a MR |
4157 | (setq special-display-frame-alist '((width . 80) (height . 20))) |
4158 | ||
4159 | These supersede the values given in `default-frame-alist'." | |
4160 | :type '(repeat (cons :format "%v" | |
4161 | (symbol :tag "Parameter") | |
4162 | (sexp :tag "Value"))) | |
4163 | :group 'frames) | |
4164 | ||
4165 | (defun special-display-popup-frame (buffer &optional args) | |
4166 | "Display BUFFER and return the window chosen. | |
4167 | If BUFFER is already displayed in a visible or iconified frame, | |
4168 | raise that frame. Otherwise, display BUFFER in a new frame. | |
4169 | ||
4170 | Optional argument ARGS is a list specifying additional | |
4171 | information. | |
4172 | ||
4173 | If ARGS is an alist, use it as a list of frame parameters. If | |
4174 | these parameters contain \(same-window . t), display BUFFER in | |
4175 | the selected window. If they contain \(same-frame . t), display | |
4176 | BUFFER in a window of the selected frame. | |
4177 | ||
4178 | If ARGS is a list whose car is a symbol, use (car ARGS) as a | |
4179 | function to do the work. Pass it BUFFER as first argument, | |
4180 | and (cdr ARGS) as second." | |
4181 | (if (and args (symbolp (car args))) | |
4182 | (apply (car args) buffer (cdr args)) | |
4183 | (let ((window (get-buffer-window buffer 0))) | |
4184 | (or | |
4185 | ;; If we have a window already, make it visible. | |
4186 | (when window | |
4187 | (let ((frame (window-frame window))) | |
4188 | (make-frame-visible frame) | |
4189 | (raise-frame frame) | |
cf4eacfd | 4190 | (display-buffer-record-window 'reuse window buffer) |
f818cd2a MR |
4191 | window)) |
4192 | ;; Reuse the current window if the user requested it. | |
4193 | (when (cdr (assq 'same-window args)) | |
4194 | (condition-case nil | |
4195 | (progn (switch-to-buffer buffer nil t) (selected-window)) | |
4196 | (error nil))) | |
4197 | ;; Stay on the same frame if requested. | |
4198 | (when (or (cdr (assq 'same-frame args)) (cdr (assq 'same-window args))) | |
4199 | (let* ((pop-up-windows t) | |
4200 | pop-up-frames | |
4201 | special-display-buffer-names special-display-regexps) | |
4202 | (display-buffer buffer))) | |
4203 | ;; If no window yet, make one in a new frame. | |
7f80c86d MR |
4204 | (let* ((frame |
4205 | (with-current-buffer buffer | |
4206 | (make-frame (append args special-display-frame-alist)))) | |
4207 | (window (frame-selected-window frame))) | |
4208 | (display-buffer-record-window 'frame window buffer) | |
4209 | (set-window-buffer window buffer) | |
4210 | ;; Reset list of WINDOW's previous buffers to nil. | |
4211 | (set-window-prev-buffers window nil) | |
4212 | (set-window-dedicated-p window t) | |
4213 | window))))) | |
f818cd2a MR |
4214 | |
4215 | (defcustom special-display-function 'special-display-popup-frame | |
4216 | "Function to call for displaying special buffers. | |
4217 | This function is called with two arguments - the buffer and, | |
4218 | optionally, a list - and should return a window displaying that | |
4219 | buffer. The default value usually makes a separate frame for the | |
4220 | buffer using `special-display-frame-alist' to specify the frame | |
4221 | parameters. See the definition of `special-display-popup-frame' | |
4222 | for how to specify such a function. | |
4223 | ||
4224 | A buffer is special when its name is either listed in | |
4225 | `special-display-buffer-names' or matches a regexp in | |
4226 | `special-display-regexps'. | |
4227 | ||
f678e0b6 MR |
4228 | The function specified here is responsible for setting the |
4229 | quit-restore and help-setup parameters of the window used." | |
f818cd2a MR |
4230 | :type 'function |
4231 | :group 'frames) | |
4232 | ||
4233 | (defcustom same-window-buffer-names nil | |
4234 | "List of names of buffers that should appear in the \"same\" window. | |
4235 | `display-buffer' and `pop-to-buffer' show a buffer whose name is | |
4236 | on this list in the selected rather than some other window. | |
4237 | ||
4238 | An element of this list can be a cons cell instead of just a | |
4239 | string. In that case, the cell's car must be a string specifying | |
4240 | the buffer name. This is for compatibility with | |
4241 | `special-display-buffer-names'; the cdr of the cons cell is | |
4242 | ignored. | |
4243 | ||
4244 | See also `same-window-regexps'." | |
4245 | :type '(repeat (string :format "%v")) | |
4246 | :group 'windows) | |
4247 | ||
4248 | (defcustom same-window-regexps nil | |
4249 | "List of regexps saying which buffers should appear in the \"same\" window. | |
4250 | `display-buffer' and `pop-to-buffer' show a buffer whose name | |
4251 | matches a regexp on this list in the selected rather than some | |
4252 | other window. | |
4253 | ||
4254 | An element of this list can be a cons cell instead of just a | |
4255 | string. In that case, the cell's car must be a regexp matching | |
4256 | the buffer name. This is for compatibility with | |
4257 | `special-display-regexps'; the cdr of the cons cell is ignored. | |
9481c002 | 4258 | |
f818cd2a MR |
4259 | See also `same-window-buffer-names'." |
4260 | :type '(repeat (regexp :format "%v")) | |
4261 | :group 'windows) | |
9481c002 | 4262 | |
f818cd2a MR |
4263 | (defun same-window-p (buffer-name) |
4264 | "Return non-nil if a buffer named BUFFER-NAME would be shown in the \"same\" window. | |
4265 | This function returns non-nil if `display-buffer' or | |
4266 | `pop-to-buffer' would show a buffer named BUFFER-NAME in the | |
4267 | selected rather than \(as usual\) some other window. See | |
4268 | `same-window-buffer-names' and `same-window-regexps'." | |
4269 | (cond | |
4270 | ((not (stringp buffer-name))) | |
4271 | ;; The elements of `same-window-buffer-names' can be buffer | |
4272 | ;; names or cons cells whose cars are buffer names. | |
4273 | ((member buffer-name same-window-buffer-names)) | |
4274 | ((assoc buffer-name same-window-buffer-names)) | |
4275 | ((catch 'found | |
4276 | (dolist (regexp same-window-regexps) | |
4277 | ;; The elements of `same-window-regexps' can be regexps | |
4278 | ;; or cons cells whose cars are regexps. | |
4279 | (when (or (and (stringp regexp) | |
4280 | (string-match regexp buffer-name)) | |
4281 | (and (consp regexp) (stringp (car regexp)) | |
4282 | (string-match-p (car regexp) buffer-name))) | |
4283 | (throw 'found t))))))) | |
3c448ab6 | 4284 | |
d1067961 | 4285 | (defcustom pop-up-frames nil |
3c448ab6 | 4286 | "Whether `display-buffer' should make a separate frame. |
d1f18ec0 | 4287 | If nil, never make a separate frame. |
3c448ab6 MR |
4288 | If the value is `graphic-only', make a separate frame |
4289 | on graphic displays only. | |
4290 | Any other non-nil value means always make a separate frame." | |
4291 | :type '(choice | |
4292 | (const :tag "Never" nil) | |
4293 | (const :tag "On graphic displays only" graphic-only) | |
4294 | (const :tag "Always" t)) | |
f818cd2a | 4295 | :group 'windows) |
3c448ab6 | 4296 | |
d1067961 | 4297 | (defcustom display-buffer-reuse-frames nil |
f818cd2a | 4298 | "Non-nil means `display-buffer' should reuse frames. |
3c448ab6 MR |
4299 | If the buffer in question is already displayed in a frame, raise |
4300 | that frame." | |
4301 | :type 'boolean | |
d1067961 | 4302 | :version "21.1" |
f818cd2a | 4303 | :group 'windows) |
3c448ab6 | 4304 | |
4dc2a129 MR |
4305 | (defcustom pop-up-windows t |
4306 | "Non-nil means `display-buffer' should make a new window." | |
3c448ab6 MR |
4307 | :type 'boolean |
4308 | :group 'windows) | |
4309 | ||
8b10a2d1 | 4310 | (defcustom split-window-preferred-function 'split-window-sensibly |
f818cd2a | 4311 | "Function called by `display-buffer' routines to split a window. |
8b10a2d1 MR |
4312 | This function is called with a window as single argument and is |
4313 | supposed to split that window and return the new window. If the | |
4314 | window can (or shall) not be split, it is supposed to return nil. | |
4315 | The default is to call the function `split-window-sensibly' which | |
4316 | tries to split the window in a way which seems most suitable. | |
4317 | You can customize the options `split-height-threshold' and/or | |
4318 | `split-width-threshold' in order to have `split-window-sensibly' | |
4319 | prefer either vertical or horizontal splitting. | |
4320 | ||
f818cd2a MR |
4321 | If you set this to any other function, bear in mind that the |
4322 | `display-buffer' routines may call this function two times. The | |
4323 | argument of the first call is the largest window on its frame. | |
4324 | If that call fails to return a live window, the function is | |
4325 | called again with the least recently used window as argument. If | |
4326 | that call fails too, `display-buffer' will use an existing window | |
4327 | to display its buffer. | |
8b10a2d1 MR |
4328 | |
4329 | The window selected at the time `display-buffer' was invoked is | |
4330 | still selected when this function is called. Hence you can | |
4331 | compare the window argument with the value of `selected-window' | |
4332 | if you intend to split the selected window instead or if you do | |
4333 | not want to split the selected window." | |
4334 | :type 'function | |
3c448ab6 MR |
4335 | :version "23.1" |
4336 | :group 'windows) | |
4337 | ||
8b10a2d1 | 4338 | (defcustom split-height-threshold 80 |
f818cd2a MR |
4339 | "Minimum height for splitting windows sensibly. |
4340 | If this is an integer, `split-window-sensibly' may split a window | |
8b10a2d1 | 4341 | vertically only if it has at least this many lines. If this is |
f818cd2a MR |
4342 | nil, `split-window-sensibly' is not allowed to split a window |
4343 | vertically. If, however, a window is the only window on its | |
4344 | frame, `split-window-sensibly' may split it vertically | |
4345 | disregarding the value of this variable." | |
8b10a2d1 | 4346 | :type '(choice (const nil) (integer :tag "lines")) |
3c448ab6 MR |
4347 | :version "23.1" |
4348 | :group 'windows) | |
4349 | ||
8b10a2d1 | 4350 | (defcustom split-width-threshold 160 |
f818cd2a MR |
4351 | "Minimum width for splitting windows sensibly. |
4352 | If this is an integer, `split-window-sensibly' may split a window | |
8b10a2d1 | 4353 | horizontally only if it has at least this many columns. If this |
f818cd2a MR |
4354 | is nil, `split-window-sensibly' is not allowed to split a window |
4355 | horizontally." | |
8b10a2d1 | 4356 | :type '(choice (const nil) (integer :tag "columns")) |
3c448ab6 MR |
4357 | :version "23.1" |
4358 | :group 'windows) | |
9481c002 | 4359 | |
8b10a2d1 MR |
4360 | (defun window-splittable-p (window &optional horizontal) |
4361 | "Return non-nil if `split-window-sensibly' may split WINDOW. | |
4362 | Optional argument HORIZONTAL nil or omitted means check whether | |
4363 | `split-window-sensibly' may split WINDOW vertically. HORIZONTAL | |
4364 | non-nil means check whether WINDOW may be split horizontally. | |
3c448ab6 | 4365 | |
8b10a2d1 | 4366 | WINDOW may be split vertically when the following conditions |
3c448ab6 | 4367 | hold: |
3c448ab6 MR |
4368 | - `window-size-fixed' is either nil or equals `width' for the |
4369 | buffer of WINDOW. | |
8b10a2d1 | 4370 | - `split-height-threshold' is an integer and WINDOW is at least as |
3c448ab6 | 4371 | high as `split-height-threshold'. |
3c448ab6 MR |
4372 | - When WINDOW is split evenly, the emanating windows are at least |
4373 | `window-min-height' lines tall and can accommodate at least one | |
4374 | line plus - if WINDOW has one - a mode line. | |
4375 | ||
8b10a2d1 | 4376 | WINDOW may be split horizontally when the following conditions |
3c448ab6 | 4377 | hold: |
3c448ab6 MR |
4378 | - `window-size-fixed' is either nil or equals `height' for the |
4379 | buffer of WINDOW. | |
8b10a2d1 | 4380 | - `split-width-threshold' is an integer and WINDOW is at least as |
3c448ab6 | 4381 | wide as `split-width-threshold'. |
3c448ab6 MR |
4382 | - When WINDOW is split evenly, the emanating windows are at least |
4383 | `window-min-width' or two (whichever is larger) columns wide." | |
4384 | (when (window-live-p window) | |
4385 | (with-current-buffer (window-buffer window) | |
4386 | (if horizontal | |
4387 | ;; A window can be split horizontally when its width is not | |
4388 | ;; fixed, it is at least `split-width-threshold' columns wide | |
4389 | ;; and at least twice as wide as `window-min-width' and 2 (the | |
4390 | ;; latter value is hardcoded). | |
4391 | (and (memq window-size-fixed '(nil height)) | |
4392 | ;; Testing `window-full-width-p' here hardly makes any | |
4393 | ;; sense nowadays. This can be done more intuitively by | |
4394 | ;; setting up `split-width-threshold' appropriately. | |
4395 | (numberp split-width-threshold) | |
4396 | (>= (window-width window) | |
4397 | (max split-width-threshold | |
4398 | (* 2 (max window-min-width 2))))) | |
4399 | ;; A window can be split vertically when its height is not | |
4400 | ;; fixed, it is at least `split-height-threshold' lines high, | |
4401 | ;; and it is at least twice as high as `window-min-height' and 2 | |
4402 | ;; if it has a modeline or 1. | |
4403 | (and (memq window-size-fixed '(nil width)) | |
4404 | (numberp split-height-threshold) | |
4405 | (>= (window-height window) | |
4406 | (max split-height-threshold | |
4407 | (* 2 (max window-min-height | |
4408 | (if mode-line-format 2 1)))))))))) | |
4409 | ||
8b10a2d1 MR |
4410 | (defun split-window-sensibly (window) |
4411 | "Split WINDOW in a way suitable for `display-buffer'. | |
4412 | If `split-height-threshold' specifies an integer, WINDOW is at | |
4413 | least `split-height-threshold' lines tall and can be split | |
4414 | vertically, split WINDOW into two windows one above the other and | |
4415 | return the lower window. Otherwise, if `split-width-threshold' | |
4416 | specifies an integer, WINDOW is at least `split-width-threshold' | |
4417 | columns wide and can be split horizontally, split WINDOW into two | |
4418 | windows side by side and return the window on the right. If this | |
4419 | can't be done either and WINDOW is the only window on its frame, | |
4420 | try to split WINDOW vertically disregarding any value specified | |
4421 | by `split-height-threshold'. If that succeeds, return the lower | |
4422 | window. Return nil otherwise. | |
4423 | ||
4424 | By default `display-buffer' routines call this function to split | |
4425 | the largest or least recently used window. To change the default | |
4426 | customize the option `split-window-preferred-function'. | |
4427 | ||
4428 | You can enforce this function to not split WINDOW horizontally, | |
4429 | by setting \(or binding) the variable `split-width-threshold' to | |
4430 | nil. If, in addition, you set `split-height-threshold' to zero, | |
4431 | chances increase that this function does split WINDOW vertically. | |
4432 | ||
4433 | In order to not split WINDOW vertically, set \(or bind) the | |
4434 | variable `split-height-threshold' to nil. Additionally, you can | |
4435 | set `split-width-threshold' to zero to make a horizontal split | |
4436 | more likely to occur. | |
4437 | ||
4438 | Have a look at the function `window-splittable-p' if you want to | |
4439 | know how `split-window-sensibly' determines whether WINDOW can be | |
4440 | split." | |
f818cd2a | 4441 | (or (and (window-splittable-p window) |
8b10a2d1 MR |
4442 | ;; Split window vertically. |
4443 | (with-selected-window window | |
2d197ffb | 4444 | (split-window-below))) |
f818cd2a | 4445 | (and (window-splittable-p window t) |
8b10a2d1 MR |
4446 | ;; Split window horizontally. |
4447 | (with-selected-window window | |
2d197ffb | 4448 | (split-window-right))) |
8b10a2d1 MR |
4449 | (and (eq window (frame-root-window (window-frame window))) |
4450 | (not (window-minibuffer-p window)) | |
4451 | ;; If WINDOW is the only window on its frame and is not the | |
4452 | ;; minibuffer window, try to split it vertically disregarding | |
4453 | ;; the value of `split-height-threshold'. | |
4454 | (let ((split-height-threshold 0)) | |
f818cd2a | 4455 | (when (window-splittable-p window) |
8b10a2d1 | 4456 | (with-selected-window window |
2d197ffb | 4457 | (split-window-below))))))) |
9481c002 | 4458 | |
f818cd2a MR |
4459 | (defun window--try-to-split-window (window) |
4460 | "Try to split WINDOW. | |
4461 | Return value returned by `split-window-preferred-function' if it | |
4462 | represents a live window, nil otherwise." | |
4463 | (and (window-live-p window) | |
4464 | (not (frame-parameter (window-frame window) 'unsplittable)) | |
4465 | (let ((new-window | |
4466 | ;; Since `split-window-preferred-function' might | |
4467 | ;; throw an error use `condition-case'. | |
4468 | (condition-case nil | |
4469 | (funcall split-window-preferred-function window) | |
4470 | (error nil)))) | |
4471 | (and (window-live-p new-window) new-window)))) | |
4472 | ||
4473 | (defun window--frame-usable-p (frame) | |
4474 | "Return FRAME if it can be used to display a buffer." | |
4475 | (when (frame-live-p frame) | |
4476 | (let ((window (frame-root-window frame))) | |
4477 | ;; `frame-root-window' may be an internal window which is considered | |
4478 | ;; "dead" by `window-live-p'. Hence if `window' is not live we | |
4479 | ;; implicitly know that `frame' has a visible window we can use. | |
4480 | (unless (and (window-live-p window) | |
4481 | (or (window-minibuffer-p window) | |
4482 | ;; If the window is soft-dedicated, the frame is usable. | |
4483 | ;; Actually, even if the window is really dedicated, | |
4484 | ;; the frame is still usable by splitting it. | |
4485 | ;; At least Emacs-22 allowed it, and it is desirable | |
4486 | ;; when displaying same-frame windows. | |
4487 | nil ; (eq t (window-dedicated-p window)) | |
4488 | )) | |
4489 | frame)))) | |
4490 | ||
4491 | (defcustom even-window-heights t | |
4492 | "If non-nil `display-buffer' will try to even window heights. | |
4493 | Otherwise `display-buffer' will leave the window configuration | |
4494 | alone. Heights are evened only when `display-buffer' chooses a | |
4495 | window that appears above or below the selected window." | |
4496 | :type 'boolean | |
4497 | :group 'windows) | |
4498 | ||
4499 | (defun window--even-window-heights (window) | |
4500 | "Even heights of WINDOW and selected window. | |
4501 | Do this only if these windows are vertically adjacent to each | |
4502 | other, `even-window-heights' is non-nil, and the selected window | |
4503 | is higher than WINDOW." | |
4504 | (when (and even-window-heights | |
4505 | (not (eq window (selected-window))) | |
4506 | ;; Don't resize minibuffer windows. | |
4507 | (not (window-minibuffer-p (selected-window))) | |
4508 | (> (window-height (selected-window)) (window-height window)) | |
4509 | (eq (window-frame window) (window-frame (selected-window))) | |
4510 | (let ((sel-edges (window-edges (selected-window))) | |
4511 | (win-edges (window-edges window))) | |
4512 | (and (= (nth 0 sel-edges) (nth 0 win-edges)) | |
4513 | (= (nth 2 sel-edges) (nth 2 win-edges)) | |
4514 | (or (= (nth 1 sel-edges) (nth 3 win-edges)) | |
4515 | (= (nth 3 sel-edges) (nth 1 win-edges)))))) | |
4516 | (let ((window-min-height 1)) | |
4517 | ;; Don't throw an error if we can't even window heights for | |
4518 | ;; whatever reason. | |
4519 | (condition-case nil | |
4520 | (enlarge-window (/ (- (window-height window) (window-height)) 2)) | |
4521 | (error nil))))) | |
4522 | ||
4523 | (defun window--display-buffer-1 (window) | |
4524 | "Raise the frame containing WINDOW. | |
4525 | Do not raise the selected frame. Return WINDOW." | |
4526 | (let* ((frame (window-frame window)) | |
4527 | (visible (frame-visible-p frame))) | |
4528 | (unless (or (not visible) | |
4529 | ;; Assume the selected frame is already visible enough. | |
4530 | (eq frame (selected-frame)) | |
4531 | ;; Assume the frame from which we invoked the minibuffer | |
4532 | ;; is visible. | |
4533 | (and (minibuffer-window-active-p (selected-window)) | |
4534 | (eq frame (window-frame (minibuffer-selected-window))))) | |
4535 | (raise-frame frame)) | |
4536 | window)) | |
4537 | ||
4538 | (defun window--display-buffer-2 (buffer window &optional dedicated) | |
4539 | "Display BUFFER in WINDOW and make its frame visible. | |
4540 | Set `window-dedicated-p' to DEDICATED if non-nil. | |
4541 | Return WINDOW." | |
4542 | (when (and (buffer-live-p buffer) (window-live-p window)) | |
4543 | (set-window-buffer window buffer) | |
4544 | (when dedicated | |
4545 | (set-window-dedicated-p window dedicated)) | |
4546 | (window--display-buffer-1 window))) | |
4547 | ||
4548 | (defvar display-buffer-mark-dedicated nil | |
4549 | "If non-nil, `display-buffer' marks the windows it creates as dedicated. | |
4550 | The actual non-nil value of this variable will be copied to the | |
4551 | `window-dedicated-p' flag.") | |
4552 | ||
f818cd2a MR |
4553 | (defun window-normalize-buffer-to-display (buffer-or-name) |
4554 | "Normalize BUFFER-OR-NAME argument for buffer display functions. | |
4555 | If BUFFER-OR-NAME is nil, return the curent buffer. Else, if a | |
4556 | buffer specified by BUFFER-OR-NAME exists, return that buffer. | |
4557 | If no such buffer exists, create a buffer with the name | |
4558 | BUFFER-OR-NAME and return that buffer." | |
4559 | (if buffer-or-name | |
4560 | (or (get-buffer buffer-or-name) | |
4561 | (let ((buffer (get-buffer-create buffer-or-name))) | |
4562 | (set-buffer-major-mode buffer) | |
4563 | buffer)) | |
4564 | (current-buffer))) | |
4565 | ||
fa5660f9 CY |
4566 | (defconst display-buffer--action-function-custom-type |
4567 | '(choice :tag "Function" | |
4568 | (const :tag "--" ignore) ; default for insertion | |
fa5660f9 | 4569 | (const display-buffer-reuse-window) |
fa5660f9 CY |
4570 | (const display-buffer-use-some-window) |
4571 | (const display-buffer-same-window) | |
4572 | (const display-buffer-pop-up-frame) | |
4573 | (const display-buffer-use-some-window) | |
4574 | (function :tag "Other function")) | |
4575 | "Custom type for `display-buffer' action functions.") | |
4576 | ||
4577 | (defconst display-buffer--action-custom-type | |
4578 | `(cons :tag "Action" | |
4579 | (choice :tag "Action functions" | |
4580 | ,display-buffer--action-function-custom-type | |
4581 | (repeat | |
4582 | :tag "List of functions" | |
4583 | ,display-buffer--action-function-custom-type)) | |
4584 | (alist :tag "Action arguments" | |
4585 | :key-type symbol | |
4586 | :value-type (sexp :tag "Value"))) | |
4587 | "Custom type for `display-buffer' actions.") | |
4588 | ||
cbb0f9ab CY |
4589 | (defvar display-buffer-overriding-action '(nil . nil) |
4590 | "Overriding action to perform to display a buffer. | |
4591 | It should be a cons cell (FUNCTION . ALIST), where FUNCTION is a | |
4592 | function or a list of functions. Each function should accept 2 | |
4593 | arguments: a buffer to display and an alist similar to ALIST. | |
4594 | See `display-buffer' for details.") | |
4595 | (put 'display-buffer-overriding-action 'risky-local-variable t) | |
4596 | ||
fa5660f9 | 4597 | (defcustom display-buffer-alist nil |
89894cd8 CY |
4598 | "Alist of conditional actions for `display-buffer'. |
4599 | This is a list of elements (CONDITION . ACTION), where: | |
4600 | ||
4601 | CONDITION is either a regexp matching buffer names, or a function | |
4602 | that takes a buffer and returns a boolean. | |
4603 | ||
8319e0bf CY |
4604 | ACTION is a cons cell (FUNCTION . ALIST), where FUNCTION is a |
4605 | function or a list of functions. Each such function should | |
4606 | accept 2 arguments: a buffer to display and an alist of the | |
fa5660f9 CY |
4607 | same form as ALIST. See `display-buffer' for details." |
4608 | :type `(alist :key-type | |
4609 | (choice :tag "Condition" | |
4610 | regexp | |
4611 | (function :tag "Matcher function")) | |
4612 | :value-type ,display-buffer--action-custom-type) | |
4613 | :risky t | |
4614 | :version "24.1" | |
4615 | :group 'windows) | |
89894cd8 | 4616 | |
cbb0f9ab CY |
4617 | (defcustom display-buffer-base-action '(nil . nil) |
4618 | "User-specified default action for `display-buffer'. | |
8319e0bf CY |
4619 | It should be a cons cell (FUNCTION . ALIST), where FUNCTION is a |
4620 | function or a list of functions. Each function should accept 2 | |
fa5660f9 CY |
4621 | arguments: a buffer to display and an alist similar to ALIST. |
4622 | See `display-buffer' for details." | |
4623 | :type display-buffer--action-custom-type | |
4624 | :risky t | |
4625 | :version "24.1" | |
4626 | :group 'windows) | |
89894cd8 | 4627 | |
cbb0f9ab CY |
4628 | (defconst display-buffer-fallback-action |
4629 | '((display-buffer--maybe-same-window | |
4630 | display-buffer-reuse-window | |
4631 | display-buffer--special | |
4632 | display-buffer--maybe-pop-up-frame-or-window | |
4633 | display-buffer-use-some-window | |
4634 | ;; If all else fails, pop up a new frame. | |
4635 | display-buffer-pop-up-frame)) | |
4636 | "Default fallback action for `display-buffer'. | |
4637 | This is the action used by `display-buffer' if no other actions | |
4638 | specified, e.g. by the user options `display-buffer-alist' or | |
4639 | `display-buffer-base-action'. See `display-buffer'.") | |
4640 | (put 'display-buffer-fallback-action 'risky-local-variable t) | |
f818cd2a MR |
4641 | |
4642 | (defun display-buffer-assq-regexp (buffer-name alist) | |
4643 | "Retrieve ALIST entry corresponding to BUFFER-NAME." | |
4644 | (catch 'match | |
4645 | (dolist (entry alist) | |
4646 | (let ((key (car entry)) | |
4647 | (value (cdr entry))) | |
4648 | (when (or (and (stringp key) | |
4649 | (string-match-p key buffer-name)) | |
4650 | (and (symbolp key) (functionp key) | |
4651 | (funcall key buffer-name alist))) | |
4652 | (throw 'match (cdr entry))))))) | |
4653 | ||
8319e0bf CY |
4654 | (defvar display-buffer--same-window-action |
4655 | '(display-buffer-same-window | |
4656 | (inhibit-same-window . nil)) | |
4657 | "A `display-buffer' action for displaying in the same window.") | |
4658 | (put 'display-buffer--same-window-action 'risky-local-variable t) | |
4659 | ||
4660 | (defvar display-buffer--other-frame-action | |
4661 | '((display-buffer-reuse-window | |
4662 | display-buffer--special | |
4663 | display-buffer-pop-up-frame) | |
4664 | (reusable-frames . 0) | |
4665 | (inhibit-same-window . t)) | |
4666 | "A `display-buffer' action for displaying in another frame.") | |
4667 | (put 'display-buffer--other-frame-action 'risky-local-variable t) | |
4668 | ||
f818cd2a | 4669 | (defun display-buffer (&optional buffer-or-name action frame) |
3199b96f | 4670 | "Display BUFFER-OR-NAME in some window, without selecting it. |
89894cd8 CY |
4671 | BUFFER-OR-NAME must be a buffer or the name of an existing |
4672 | buffer. Return the window chosen for displaying BUFFER-OR-NAME, | |
4673 | or nil if no such window is found. | |
4674 | ||
4675 | Optional argument ACTION should have the form (FUNCTION . ALIST). | |
4676 | FUNCTION is either a function or a list of functions. Each such | |
4677 | function is called with 2 arguments: the buffer to display and an | |
4678 | alist. It should either display the buffer and return the | |
fa5660f9 | 4679 | window, or return nil if unable to display the buffer. |
89894cd8 | 4680 | |
cbb0f9ab CY |
4681 | The `display-buffer' function builds a function list and an alist |
4682 | from `display-buffer-overriding-action', `display-buffer-alist', | |
4683 | the ACTION argument, `display-buffer-base-action', and | |
4684 | `display-buffer-fallback-action' (in that order). Then it calls | |
4685 | each function in the combined function list in turn, passing the | |
4686 | buffer as the first argument and the combined alist as the second | |
4687 | argument, until one of the functions returns non-nil. | |
8319e0bf CY |
4688 | |
4689 | Available action functions include: | |
4690 | `display-buffer-same-window' | |
8319e0bf CY |
4691 | `display-buffer-reuse-window' |
4692 | `display-buffer-pop-up-frame' | |
4693 | `display-buffer-pop-up-window' | |
4694 | `display-buffer-use-some-window' | |
4695 | ||
4696 | Recognized alist entries include: | |
4697 | ||
4698 | `inhibit-same-window' -- A non-nil value prevents the same | |
4699 | window from being used for display. | |
4700 | ||
4701 | `reusable-frames' -- Value specifies frame(s) to search for a | |
4702 | window that already displays the buffer. | |
4703 | See `display-buffer-reuse-window'. | |
2a7bdc1a CY |
4704 | |
4705 | The ACTION argument to `display-buffer' can also have a non-nil | |
4706 | and non-list value. This means to display the buffer in a window | |
4707 | other than the selected one, even if it is already displayed in | |
4708 | the selected window. If called interactively with a prefix | |
4709 | argument, ACTION is t. | |
89894cd8 | 4710 | |
8319e0bf CY |
4711 | Optional argument FRAME, if non-nil, acts like an additional |
4712 | ALIST entry (reusable-frames . FRAME), specifying the frame(s) to | |
4713 | search for a window that is already displaying the buffer. See | |
4714 | `display-buffer-reuse-window'." | |
c3313451 CY |
4715 | (interactive (list (read-buffer "Display buffer: " (other-buffer)) |
4716 | (if current-prefix-arg t))) | |
89894cd8 CY |
4717 | (let ((buffer (window-normalize-buffer-to-display buffer-or-name)) |
4718 | ;; Handle the old form of the first argument. | |
4719 | (inhibit-same-window (and action (not (listp action))))) | |
4720 | (unless (listp action) (setq action nil)) | |
4721 | (if display-buffer-function | |
4722 | ;; If `display-buffer-function' is defined, let it do the job. | |
4723 | (funcall display-buffer-function buffer inhibit-same-window) | |
4724 | ;; Otherwise, use the defined actions. | |
4725 | (let* ((user-action | |
4726 | (display-buffer-assq-regexp (buffer-name buffer) | |
4727 | display-buffer-alist)) | |
4728 | ;; Extra actions from the arguments to this function: | |
4729 | (extra-action | |
4730 | (cons nil (append (if inhibit-same-window | |
4731 | '((inhibit-same-window . t))) | |
4732 | (if frame | |
8319e0bf | 4733 | `((reusable-frames . ,frame)))))) |
89894cd8 CY |
4734 | ;; Construct action function list and action alist. |
4735 | (actions (list display-buffer-overriding-action | |
4736 | user-action action extra-action | |
cbb0f9ab CY |
4737 | display-buffer-base-action |
4738 | display-buffer-fallback-action)) | |
89894cd8 CY |
4739 | (functions (apply 'append |
4740 | (mapcar (lambda (x) | |
4741 | (setq x (car x)) | |
c3313451 | 4742 | (if (functionp x) (list x) x)) |
89894cd8 CY |
4743 | actions))) |
4744 | (alist (apply 'append (mapcar 'cdr actions))) | |
4745 | window) | |
4746 | (unless (buffer-live-p buffer) | |
4747 | (error "Invalid buffer")) | |
4748 | (while (and functions (not window)) | |
4749 | (setq window (funcall (car functions) buffer alist) | |
4750 | functions (cdr functions))) | |
4751 | window)))) | |
f818cd2a MR |
4752 | |
4753 | (defun display-buffer-other-frame (buffer) | |
4754 | "Display buffer BUFFER in another frame. | |
4755 | This uses the function `display-buffer' as a subroutine; see | |
4756 | its documentation for additional customization information." | |
4757 | (interactive "BDisplay buffer in other frame: ") | |
8319e0bf | 4758 | (display-buffer buffer display-buffer--other-frame-action t)) |
f818cd2a | 4759 | |
89894cd8 | 4760 | ;;; `display-buffer' action functions: |
437014c8 | 4761 | |
89894cd8 | 4762 | (defun display-buffer-same-window (buffer alist) |
8319e0bf CY |
4763 | "Display BUFFER in the selected window. |
4764 | This fails if ALIST has a non-nil `inhibit-same-window' entry, or | |
4765 | if the selected window is a minibuffer window or is dedicated to | |
4766 | another buffer; in that case, return nil. Otherwise, return the | |
4767 | selected window." | |
89894cd8 CY |
4768 | (unless (or (cdr (assq 'inhibit-same-window alist)) |
4769 | (window-minibuffer-p) | |
4770 | (window-dedicated-p)) | |
cf4eacfd | 4771 | (display-buffer-record-window 'reuse (selected-window) buffer) |
89894cd8 CY |
4772 | (window--display-buffer-2 buffer (selected-window)))) |
4773 | ||
0d3ff375 | 4774 | (defun display-buffer--maybe-same-window (buffer alist) |
8319e0bf CY |
4775 | "Conditionally display BUFFER in the selected window. |
4776 | If `same-window-p' returns non-nil for BUFFER's name, call | |
4777 | `display-buffer-same-window' and return its value. Otherwise, | |
4778 | return nil." | |
89894cd8 CY |
4779 | (and (same-window-p (buffer-name buffer)) |
4780 | (display-buffer-same-window buffer alist))) | |
4781 | ||
4782 | (defun display-buffer-reuse-window (buffer alist) | |
4783 | "Return a window that is already displaying BUFFER. | |
8319e0bf CY |
4784 | Return nil if no usable window is found. |
4785 | ||
4786 | If ALIST has a non-nil `inhibit-same-window' entry, the selected | |
4787 | window is not eligible for reuse. | |
4788 | ||
4789 | If ALIST contains a `reusable-frames' entry, its value determines | |
4790 | which frames to search for a reusable window: | |
4791 | nil -- the selected frame (actually the last non-minibuffer frame) | |
4792 | A frame -- just that frame | |
4793 | `visible' -- all visible frames | |
4794 | 0 -- all frames on the current terminal | |
4795 | t -- all frames. | |
4796 | ||
4797 | If ALIST contains no `reusable-frames' entry, search just the | |
4798 | selected frame if `display-buffer-reuse-frames' and | |
4799 | `pop-up-frames' are both nil; search all frames on the current | |
4800 | terminal if either of those variables is non-nil." | |
4801 | (let* ((alist-entry (assq 'reusable-frames alist)) | |
4802 | (frames (cond (alist-entry (cdr alist-entry)) | |
4803 | ((if (eq pop-up-frames 'graphic-only) | |
4804 | (display-graphic-p) | |
4805 | pop-up-frames) | |
4806 | 0) | |
4807 | (display-buffer-reuse-frames 0) | |
4808 | (t (last-nonminibuffer-frame)))) | |
4809 | (window (if (and (eq buffer (window-buffer)) | |
4810 | (not (cdr (assq 'inhibit-same-window alist)))) | |
4811 | (selected-window) | |
4812 | (car (delq (selected-window) | |
4813 | (get-buffer-window-list buffer 'nomini | |
4814 | frames)))))) | |
89894cd8 | 4815 | (when window |
cf4eacfd | 4816 | (display-buffer-record-window 'reuse window buffer) |
89894cd8 CY |
4817 | (window--display-buffer-1 window)))) |
4818 | ||
8319e0bf CY |
4819 | (defun display-buffer--special (buffer alist) |
4820 | "Try to display BUFFER using `special-display-function'. | |
4821 | Call `special-display-p' on BUFFER's name, and if that returns | |
4822 | non-nil, call `special-display-function' on BUFFER." | |
4823 | (and special-display-function | |
4824 | ;; `special-display-p' returns either t or a list of frame | |
4825 | ;; parameters to pass to `special-display-function'. | |
4826 | (let ((pars (special-display-p (buffer-name buffer)))) | |
4827 | (when pars | |
4828 | (funcall special-display-function | |
4829 | buffer (if (listp pars) pars)))))) | |
4830 | ||
89894cd8 CY |
4831 | (defun display-buffer-pop-up-frame (buffer alist) |
4832 | "Display BUFFER in a new frame. | |
8319e0bf CY |
4833 | This works by calling `pop-up-frame-function'. If successful, |
4834 | return the window used; otherwise return nil." | |
89894cd8 CY |
4835 | (let ((fun pop-up-frame-function) |
4836 | frame window) | |
4837 | (when (and fun | |
4838 | (setq frame (funcall fun)) | |
4839 | (setq window (frame-selected-window frame))) | |
cf4eacfd | 4840 | (display-buffer-record-window 'frame window buffer) |
0e2070b5 | 4841 | (window--display-buffer-2 buffer window display-buffer-mark-dedicated) |
1f3c99ca MR |
4842 | ;; Reset list of WINDOW's previous buffers to nil. |
4843 | (set-window-prev-buffers window nil) | |
4844 | window))) | |
89894cd8 CY |
4845 | |
4846 | (defun display-buffer-pop-up-window (buffer alist) | |
4847 | "Display BUFFER by popping up a new window. | |
4848 | The new window is created on the selected frame, or in | |
4849 | `last-nonminibuffer-frame' if no windows can be created there. | |
4850 | If sucessful, return the new window; otherwise return nil." | |
4851 | (let ((frame (or (window--frame-usable-p (selected-frame)) | |
4852 | (window--frame-usable-p (last-nonminibuffer-frame)))) | |
4853 | window) | |
4854 | (when (and (or (not (frame-parameter frame 'unsplittable)) | |
4855 | ;; If the selected frame cannot be split, look at | |
4856 | ;; `last-nonminibuffer-frame'. | |
4857 | (and (eq frame (selected-frame)) | |
4858 | (setq frame (last-nonminibuffer-frame)) | |
4859 | (window--frame-usable-p frame) | |
4860 | (not (frame-parameter frame 'unsplittable)))) | |
4861 | ;; Attempt to split largest or least recently used window. | |
4862 | (setq window (or (window--try-to-split-window | |
4863 | (get-largest-window frame t)) | |
4864 | (window--try-to-split-window | |
4865 | (get-lru-window frame t))))) | |
cf4eacfd | 4866 | (display-buffer-record-window 'window window buffer) |
0e2070b5 | 4867 | (window--display-buffer-2 buffer window display-buffer-mark-dedicated) |
1f3c99ca MR |
4868 | ;; Reset list of WINDOW's previous buffers to nil. |
4869 | (set-window-prev-buffers window nil) | |
4870 | window))) | |
89894cd8 | 4871 | |
8319e0bf CY |
4872 | (defun display-buffer--maybe-pop-up-frame-or-window (buffer alist) |
4873 | "Try displaying BUFFER based on `pop-up-frames' or `pop-up-windows'. | |
4874 | ||
4875 | If `pop-up-frames' is non-nil (and not `graphic-only' on a | |
4876 | text-only terminal), try with `display-buffer-pop-up-frame'. | |
4877 | ||
4878 | If that cannot be done, and `pop-up-windows' is non-nil, try | |
4879 | again with `display-buffer-pop-up-window'." | |
4880 | (or (and (if (eq pop-up-frames 'graphic-only) | |
4881 | (display-graphic-p) | |
4882 | pop-up-frames) | |
4883 | (display-buffer-pop-up-frame buffer alist)) | |
4884 | (and pop-up-windows | |
4885 | (display-buffer-pop-up-window buffer alist)))) | |
89894cd8 CY |
4886 | |
4887 | (defun display-buffer-use-some-window (buffer alist) | |
4888 | "Display BUFFER in an existing window. | |
4889 | Search for a usable window, set that window to the buffer, and | |
4890 | return the window. If no suitable window is found, return nil." | |
4891 | (let* ((not-this-window (cdr (assq 'inhibit-same-window alist))) | |
4892 | (window-to-undedicate | |
4893 | ;; When NOT-THIS-WINDOW is non-nil, temporarily dedicate the | |
4894 | ;; selected window to its buffer, to prevent any of the | |
4895 | ;; `get-' routines below from choosing it. (Bug#1415) | |
4896 | (and not-this-window (not (window-dedicated-p)) | |
4897 | (set-window-dedicated-p (selected-window) t) | |
4898 | (selected-window))) | |
4899 | (frame (or (window--frame-usable-p (selected-frame)) | |
4900 | (window--frame-usable-p (last-nonminibuffer-frame)))) | |
8319e0bf | 4901 | window) |
89894cd8 CY |
4902 | (unwind-protect |
4903 | (setq window | |
4904 | ;; Reuse an existing window. | |
4905 | (or (get-lru-window frame) | |
4906 | (let ((window (get-buffer-window buffer 'visible))) | |
4907 | (unless (and not-this-window | |
4908 | (eq window (selected-window))) | |
4909 | window)) | |
4910 | (get-largest-window 'visible) | |
4911 | (let ((window (get-buffer-window buffer 0))) | |
4912 | (unless (and not-this-window | |
4913 | (eq window (selected-window))) | |
4914 | window)) | |
8319e0bf | 4915 | (get-largest-window 0))) |
89894cd8 CY |
4916 | (when (window-live-p window-to-undedicate) |
4917 | ;; Restore dedicated status of selected window. | |
4918 | (set-window-dedicated-p window-to-undedicate nil))) | |
4919 | (when window | |
cf4eacfd | 4920 | (display-buffer-record-window 'reuse window buffer) |
89894cd8 CY |
4921 | (window--even-window-heights window) |
4922 | (window--display-buffer-2 buffer window)))) | |
437014c8 CY |
4923 | |
4924 | ;;; Display + selection commands: | |
4925 | ||
c3313451 CY |
4926 | (defun pop-to-buffer (buffer &optional action norecord) |
4927 | "Select buffer BUFFER in some window, preferably a different one. | |
4928 | BUFFER may be a buffer, a string (a buffer name), or nil. If it | |
4929 | is a string not naming an existent buffer, create a buffer with | |
4930 | that name. If BUFFER is nil, choose some other buffer. Return | |
4931 | the buffer. | |
4932 | ||
4933 | This uses `display-buffer' as a subroutine. The optional ACTION | |
4934 | argument is passed to `display-buffer' as its ACTION argument. | |
4935 | See `display-buffer' for more information. ACTION is t if called | |
4936 | interactively with a prefix argument, which means to pop to a | |
4937 | window other than the selected one even if the buffer is already | |
4938 | displayed in the selected window. | |
4939 | ||
4940 | If the window to show BUFFER is not on the selected | |
f818cd2a MR |
4941 | frame, raise that window's frame and give it input focus. |
4942 | ||
f818cd2a MR |
4943 | Optional third arg NORECORD non-nil means do not put this buffer |
4944 | at the front of the list of recently selected ones." | |
c3313451 CY |
4945 | (interactive (list (read-buffer "Pop to buffer: " (other-buffer)) |
4946 | (if current-prefix-arg t))) | |
8319e0bf | 4947 | (setq buffer (window-normalize-buffer-to-switch-to buffer)) |
c3313451 CY |
4948 | (set-buffer buffer) |
4949 | (let* ((old-window (selected-window)) | |
4950 | (old-frame (selected-frame)) | |
8319e0bf | 4951 | (window (display-buffer buffer action)) |
c3313451 | 4952 | (frame (window-frame window))) |
97adfb97 CY |
4953 | ;; If we chose another frame, make sure it gets input focus. |
4954 | (unless (eq frame old-frame) | |
c3313451 | 4955 | (select-frame-set-input-focus frame norecord)) |
97adfb97 CY |
4956 | ;; Make sure new window is selected (Bug#8615), (Bug#6954). |
4957 | (select-window window norecord) | |
c3313451 | 4958 | buffer)) |
f818cd2a | 4959 | |
72258fe5 CY |
4960 | (defun pop-to-buffer-same-window (buffer &optional norecord) |
4961 | "Select buffer BUFFER in some window, preferably the same one. | |
4962 | This function behaves much like `switch-to-buffer', except it | |
4963 | displays with `special-display-function' if BUFFER has a match in | |
4964 | `special-display-buffer-names' or `special-display-regexps'. | |
4965 | ||
4966 | Unlike `pop-to-buffer', this function prefers using the selected | |
4967 | window over popping up a new window or frame. | |
4968 | ||
4969 | BUFFER may be a buffer, a string (a buffer name), or nil. If it | |
4970 | is a string not naming an existent buffer, create a buffer with | |
4971 | that name. If BUFFER is nil, choose some other buffer. Return | |
4972 | the buffer. | |
4973 | ||
4974 | NORECORD, if non-nil means do not put this buffer at the front of | |
4975 | the list of recently selected ones." | |
4976 | (pop-to-buffer buffer | |
4977 | '((display-buffer--special | |
4978 | display-buffer-same-window) | |
4979 | (inhibit-same-window . nil)) | |
4980 | norecord)) | |
4981 | ||
f818cd2a MR |
4982 | (defun read-buffer-to-switch (prompt) |
4983 | "Read the name of a buffer to switch to, prompting with PROMPT. | |
4984 | Return the neame of the buffer as a string. | |
4985 | ||
4986 | This function is intended for the `switch-to-buffer' family of | |
4987 | commands since these need to omit the name of the current buffer | |
4988 | from the list of completions and default values." | |
4989 | (let ((rbts-completion-table (internal-complete-buffer-except))) | |
4990 | (minibuffer-with-setup-hook | |
4991 | (lambda () | |
4992 | (setq minibuffer-completion-table rbts-completion-table) | |
4993 | ;; Since rbts-completion-table is built dynamically, we | |
4994 | ;; can't just add it to the default value of | |
4995 | ;; icomplete-with-completion-tables, so we add it | |
4996 | ;; here manually. | |
4997 | (if (and (boundp 'icomplete-with-completion-tables) | |
4998 | (listp icomplete-with-completion-tables)) | |
4999 | (set (make-local-variable 'icomplete-with-completion-tables) | |
5000 | (cons rbts-completion-table | |
5001 | icomplete-with-completion-tables)))) | |
5002 | (read-buffer prompt (other-buffer (current-buffer)) | |
5003 | (confirm-nonexistent-file-or-buffer))))) | |
5004 | ||
5005 | (defun window-normalize-buffer-to-switch-to (buffer-or-name) | |
5006 | "Normalize BUFFER-OR-NAME argument of buffer switching functions. | |
5007 | If BUFFER-OR-NAME is nil, return the buffer returned by | |
5008 | `other-buffer'. Else, if a buffer specified by BUFFER-OR-NAME | |
5009 | exists, return that buffer. If no such buffer exists, create a | |
5010 | buffer with the name BUFFER-OR-NAME and return that buffer." | |
5011 | (if buffer-or-name | |
5012 | (or (get-buffer buffer-or-name) | |
5013 | (let ((buffer (get-buffer-create buffer-or-name))) | |
5014 | (set-buffer-major-mode buffer) | |
5015 | buffer)) | |
5016 | (other-buffer))) | |
5017 | ||
5018 | (defun switch-to-buffer (buffer-or-name &optional norecord force-same-window) | |
5019 | "Switch to buffer BUFFER-OR-NAME in the selected window. | |
5020 | If called interactively, prompt for the buffer name using the | |
5021 | minibuffer. The variable `confirm-nonexistent-file-or-buffer' | |
5022 | determines whether to request confirmation before creating a new | |
5023 | buffer. | |
5024 | ||
5025 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
5026 | nil. If BUFFER-OR-NAME is a string that does not identify an | |
5027 | existing buffer, create a buffer with that name. If | |
5028 | BUFFER-OR-NAME is nil, switch to the buffer returned by | |
5029 | `other-buffer'. | |
5030 | ||
5031 | Optional argument NORECORD non-nil means do not put the buffer | |
5032 | specified by BUFFER-OR-NAME at the front of the buffer list and | |
5033 | do not make the window displaying it the most recently selected | |
5034 | one. | |
5035 | ||
5036 | If FORCE-SAME-WINDOW is non-nil, BUFFER-OR-NAME must be displayed | |
94e0933e CY |
5037 | in the selected window; signal an error if that is |
5038 | impossible (e.g. if the selected window is minibuffer-only). If | |
235ce86f | 5039 | nil, BUFFER-OR-NAME may be displayed in another window. |
f818cd2a MR |
5040 | |
5041 | Return the buffer switched to." | |
5042 | (interactive | |
acc825c5 | 5043 | (list (read-buffer-to-switch "Switch to buffer: ") nil 'force-same-window)) |
f818cd2a MR |
5044 | (let ((buffer (window-normalize-buffer-to-switch-to buffer-or-name))) |
5045 | (if (null force-same-window) | |
8319e0bf | 5046 | (pop-to-buffer buffer display-buffer--same-window-action norecord) |
f818cd2a MR |
5047 | (cond |
5048 | ;; Don't call set-window-buffer if it's not needed since it | |
5049 | ;; might signal an error (e.g. if the window is dedicated). | |
5050 | ((eq buffer (window-buffer))) | |
5051 | ((window-minibuffer-p) | |
5052 | (error "Cannot switch buffers in minibuffer window")) | |
5053 | ((eq (window-dedicated-p) t) | |
5054 | (error "Cannot switch buffers in a dedicated window")) | |
5055 | (t (set-window-buffer nil buffer))) | |
5056 | ||
5057 | (unless norecord | |
5058 | (select-window (selected-window))) | |
5059 | (set-buffer buffer)))) | |
5060 | ||
5061 | (defun switch-to-buffer-other-window (buffer-or-name &optional norecord) | |
5062 | "Select the buffer specified by BUFFER-OR-NAME in another window. | |
5063 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
5064 | nil. Return the buffer switched to. | |
5065 | ||
5066 | If called interactively, prompt for the buffer name using the | |
5067 | minibuffer. The variable `confirm-nonexistent-file-or-buffer' | |
5068 | determines whether to request confirmation before creating a new | |
5069 | buffer. | |
5070 | ||
5071 | If BUFFER-OR-NAME is a string and does not identify an existing | |
5072 | buffer, create a new buffer with that name. If BUFFER-OR-NAME is | |
5073 | nil, switch to the buffer returned by `other-buffer'. | |
5074 | ||
5075 | Optional second argument NORECORD non-nil means do not put this | |
5076 | buffer at the front of the list of recently selected ones. | |
5077 | ||
5078 | This uses the function `display-buffer' as a subroutine; see its | |
5079 | documentation for additional customization information." | |
5080 | (interactive | |
5081 | (list (read-buffer-to-switch "Switch to buffer in other window: "))) | |
8319e0bf CY |
5082 | (let ((pop-up-windows t)) |
5083 | (pop-to-buffer buffer-or-name t norecord))) | |
f818cd2a MR |
5084 | |
5085 | (defun switch-to-buffer-other-frame (buffer-or-name &optional norecord) | |
5086 | "Switch to buffer BUFFER-OR-NAME in another frame. | |
5087 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
5088 | nil. Return the buffer switched to. | |
5089 | ||
5090 | If called interactively, prompt for the buffer name using the | |
5091 | minibuffer. The variable `confirm-nonexistent-file-or-buffer' | |
5092 | determines whether to request confirmation before creating a new | |
5093 | buffer. | |
5094 | ||
5095 | If BUFFER-OR-NAME is a string and does not identify an existing | |
5096 | buffer, create a new buffer with that name. If BUFFER-OR-NAME is | |
5097 | nil, switch to the buffer returned by `other-buffer'. | |
5098 | ||
5099 | Optional second arg NORECORD non-nil means do not put this | |
5100 | buffer at the front of the list of recently selected ones. | |
5101 | ||
5102 | This uses the function `display-buffer' as a subroutine; see its | |
5103 | documentation for additional customization information." | |
5104 | (interactive | |
5105 | (list (read-buffer-to-switch "Switch to buffer in other frame: "))) | |
8319e0bf | 5106 | (pop-to-buffer buffer-or-name display-buffer--other-frame-action norecord)) |
3c448ab6 MR |
5107 | \f |
5108 | (defun set-window-text-height (window height) | |
9992ea0c | 5109 | "Set the height in lines of the text display area of WINDOW to HEIGHT. |
6198ccd0 MR |
5110 | WINDOW must be a live window. HEIGHT doesn't include the mode |
5111 | line or header line, if any, or any partial-height lines in the | |
5112 | text display area. | |
3c448ab6 MR |
5113 | |
5114 | Note that the current implementation of this function cannot | |
5115 | always set the height exactly, but attempts to be conservative, | |
5116 | by allocating more lines than are actually needed in the case | |
5117 | where some error may be present." | |
5386012d | 5118 | (setq window (window-normalize-live-window window)) |
3c448ab6 MR |
5119 | (let ((delta (- height (window-text-height window)))) |
5120 | (unless (zerop delta) | |
5121 | ;; Setting window-min-height to a value like 1 can lead to very | |
5122 | ;; bizarre displays because it also allows Emacs to make *other* | |
5123 | ;; windows 1-line tall, which means that there's no more space for | |
5124 | ;; the modeline. | |
5125 | (let ((window-min-height (min 2 height))) ; One text line plus a modeline. | |
d615d6d2 | 5126 | (window-resize window delta))))) |
3c448ab6 | 5127 | |
6198ccd0 MR |
5128 | (defun enlarge-window-horizontally (delta) |
5129 | "Make selected window DELTA columns wider. | |
3c448ab6 MR |
5130 | Interactively, if no argument is given, make selected window one |
5131 | column wider." | |
5132 | (interactive "p") | |
6198ccd0 | 5133 | (enlarge-window delta t)) |
3c448ab6 | 5134 | |
6198ccd0 MR |
5135 | (defun shrink-window-horizontally (delta) |
5136 | "Make selected window DELTA columns narrower. | |
3c448ab6 MR |
5137 | Interactively, if no argument is given, make selected window one |
5138 | column narrower." | |
5139 | (interactive "p") | |
6198ccd0 | 5140 | (shrink-window delta t)) |
3c448ab6 MR |
5141 | |
5142 | (defun count-screen-lines (&optional beg end count-final-newline window) | |
5143 | "Return the number of screen lines in the region. | |
5144 | The number of screen lines may be different from the number of actual lines, | |
5145 | due to line breaking, display table, etc. | |
5146 | ||
5147 | Optional arguments BEG and END default to `point-min' and `point-max' | |
5148 | respectively. | |
5149 | ||
5150 | If region ends with a newline, ignore it unless optional third argument | |
5151 | COUNT-FINAL-NEWLINE is non-nil. | |
5152 | ||
5153 | The optional fourth argument WINDOW specifies the window used for obtaining | |
5154 | parameters such as width, horizontal scrolling, and so on. The default is | |
5155 | to use the selected window's parameters. | |
5156 | ||
5157 | Like `vertical-motion', `count-screen-lines' always uses the current buffer, | |
5158 | regardless of which buffer is displayed in WINDOW. This makes possible to use | |
5159 | `count-screen-lines' in any buffer, whether or not it is currently displayed | |
5160 | in some window." | |
5161 | (unless beg | |
5162 | (setq beg (point-min))) | |
5163 | (unless end | |
5164 | (setq end (point-max))) | |
5165 | (if (= beg end) | |
5166 | 0 | |
5167 | (save-excursion | |
5168 | (save-restriction | |
5169 | (widen) | |
5170 | (narrow-to-region (min beg end) | |
5171 | (if (and (not count-final-newline) | |
5172 | (= ?\n (char-before (max beg end)))) | |
5173 | (1- (max beg end)) | |
5174 | (max beg end))) | |
5175 | (goto-char (point-min)) | |
5176 | (1+ (vertical-motion (buffer-size) window)))))) | |
5177 | ||
6198ccd0 MR |
5178 | (defun window-buffer-height (window) |
5179 | "Return the height (in screen lines) of the buffer that WINDOW is displaying." | |
5180 | (with-current-buffer (window-buffer window) | |
5181 | (max 1 | |
5182 | (count-screen-lines (point-min) (point-max) | |
5183 | ;; If buffer ends with a newline, ignore it when | |
5184 | ;; counting height unless point is after it. | |
5185 | (eobp) | |
5186 | window)))) | |
5187 | ||
5188 | ;;; Resizing buffers to fit their contents exactly. | |
5189 | (defun fit-window-to-buffer (&optional window max-height min-height override) | |
3c448ab6 | 5190 | "Adjust height of WINDOW to display its buffer's contents exactly. |
6198ccd0 MR |
5191 | WINDOW can be any live window and defaults to the selected one. |
5192 | ||
5193 | Optional argument MAX-HEIGHT specifies the maximum height of | |
5194 | WINDOW and defaults to the height of WINDOW's frame. Optional | |
5195 | argument MIN-HEIGHT specifies the minimum height of WINDOW and | |
5196 | defaults to `window-min-height'. Both, MAX-HEIGHT and MIN-HEIGHT | |
5197 | are specified in lines and include the mode line and header line, | |
5198 | if any. | |
5199 | ||
5200 | Optional argument OVERRIDE non-nil means override restrictions | |
5201 | imposed by `window-min-height' and `window-min-width' on the size | |
5202 | of WINDOW. | |
5203 | ||
5204 | Return the number of lines by which WINDOW was enlarged or | |
5205 | shrunk. If an error occurs during resizing, return nil but don't | |
5206 | signal an error. | |
5207 | ||
5208 | Note that even if this function makes WINDOW large enough to show | |
5209 | _all_ lines of its buffer you might not see the first lines when | |
5210 | WINDOW was scrolled." | |
f7baca20 MR |
5211 | (interactive) |
5212 | ;; Do all the work in WINDOW and its buffer and restore the selected | |
5213 | ;; window and the current buffer when we're done. | |
5386012d | 5214 | (setq window (window-normalize-live-window window)) |
6198ccd0 | 5215 | ;; Can't resize a full height or fixed-size window. |
9173deec | 5216 | (unless (or (window-size-fixed-p window) |
6198ccd0 MR |
5217 | (window-full-height-p window)) |
5218 | ;; `with-selected-window' should orderly restore the current buffer. | |
5219 | (with-selected-window window | |
5220 | ;; We are in WINDOW's buffer now. | |
938b94c8 | 5221 | (let* (;; Adjust MIN-HEIGHT. |
6198ccd0 MR |
5222 | (min-height |
5223 | (if override | |
5224 | (window-min-size window nil window) | |
5225 | (max (or min-height window-min-height) | |
5226 | window-safe-min-height))) | |
5227 | (max-window-height | |
5228 | (window-total-size (frame-root-window window))) | |
5229 | ;; Adjust MAX-HEIGHT. | |
5230 | (max-height | |
5231 | (if (or override (not max-height)) | |
5232 | max-window-height | |
5233 | (min max-height max-window-height))) | |
5234 | ;; Make `desired-height' the height necessary to show | |
5235 | ;; all of WINDOW's buffer, constrained by MIN-HEIGHT | |
5236 | ;; and MAX-HEIGHT. | |
5237 | (desired-height | |
5238 | (max | |
5239 | (min | |
5240 | (+ (count-screen-lines) | |
5241 | ;; For non-minibuffers count the mode line, if any. | |
5242 | (if (and (not (window-minibuffer-p window)) | |
5243 | mode-line-format) | |
5244 | 1 | |
5245 | 0) | |
5246 | ;; Count the header line, if any. | |
5247 | (if header-line-format 1 0)) | |
5248 | max-height) | |
5249 | min-height)) | |
5250 | (desired-delta | |
5251 | (- desired-height (window-total-size window))) | |
5252 | (delta | |
5253 | (if (> desired-delta 0) | |
5254 | (min desired-delta | |
5255 | (window-max-delta window nil window)) | |
5256 | (max desired-delta | |
5257 | (- (window-min-delta window nil window)))))) | |
5258 | ;; This `condition-case' shouldn't be necessary, but who knows? | |
5259 | (condition-case nil | |
5260 | (if (zerop delta) | |
5261 | ;; Return zero if DELTA became zero in the proces. | |
5262 | 0 | |
5263 | ;; Don't try to redisplay with the cursor at the end on its | |
5264 | ;; own line--that would force a scroll and spoil things. | |
5265 | (when (and (eobp) (bolp) (not (bobp))) | |
5266 | ;; It's silly to put `point' at the end of the previous | |
5267 | ;; line and so maybe force horizontal scrolling. | |
5268 | (set-window-point window (line-beginning-position 0))) | |
d615d6d2 MR |
5269 | ;; Call `window-resize' with OVERRIDE argument equal WINDOW. |
5270 | (window-resize window delta nil window) | |
f7baca20 MR |
5271 | ;; Check if the last line is surely fully visible. If |
5272 | ;; not, enlarge the window. | |
5273 | (let ((end (save-excursion | |
5274 | (goto-char (point-max)) | |
5275 | (when (and (bolp) (not (bobp))) | |
5276 | ;; Don't include final newline. | |
5277 | (backward-char 1)) | |
5278 | (when truncate-lines | |
5279 | ;; If line-wrapping is turned off, test the | |
5280 | ;; beginning of the last line for | |
5281 | ;; visibility instead of the end, as the | |
5282 | ;; end of the line could be invisible by | |
5283 | ;; virtue of extending past the edge of the | |
5284 | ;; window. | |
5285 | (forward-line 0)) | |
5286 | (point)))) | |
5287 | (set-window-vscroll window 0) | |
6198ccd0 MR |
5288 | ;; This loop might in some rare pathological cases raise |
5289 | ;; an error - another reason for the `condition-case'. | |
f7baca20 | 5290 | (while (and (< desired-height max-height) |
6198ccd0 | 5291 | (= desired-height (window-total-size)) |
f7baca20 | 5292 | (not (pos-visible-in-window-p end))) |
d615d6d2 | 5293 | (window-resize window 1 nil window) |
6198ccd0 MR |
5294 | (setq desired-height (1+ desired-height))))) |
5295 | (error (setq delta nil))) | |
5296 | delta)))) | |
3c448ab6 | 5297 | |
39cffb44 MR |
5298 | (defun window-safely-shrinkable-p (&optional window) |
5299 | "Return t if WINDOW can be shrunk without shrinking other windows. | |
5300 | WINDOW defaults to the selected window." | |
5301 | (with-selected-window (or window (selected-window)) | |
5302 | (let ((edges (window-edges))) | |
39cffb44 MR |
5303 | (or (= (nth 2 edges) (nth 2 (window-edges (previous-window)))) |
5304 | (= (nth 0 edges) (nth 0 (window-edges (next-window)))))))) | |
39cffb44 | 5305 | |
3c448ab6 MR |
5306 | (defun shrink-window-if-larger-than-buffer (&optional window) |
5307 | "Shrink height of WINDOW if its buffer doesn't need so many lines. | |
5308 | More precisely, shrink WINDOW vertically to be as small as | |
5309 | possible, while still showing the full contents of its buffer. | |
5310 | WINDOW defaults to the selected window. | |
5311 | ||
6198ccd0 MR |
5312 | Do not shrink WINDOW to less than `window-min-height' lines. Do |
5313 | nothing if the buffer contains more lines than the present window | |
5314 | height, or if some of the window's contents are scrolled out of | |
5315 | view, or if shrinking this window would also shrink another | |
5316 | window, or if the window is the only window of its frame. | |
3c448ab6 MR |
5317 | |
5318 | Return non-nil if the window was shrunk, nil otherwise." | |
5319 | (interactive) | |
5386012d | 5320 | (setq window (window-normalize-live-window window)) |
6198ccd0 MR |
5321 | ;; Make sure that WINDOW is vertically combined and `point-min' is |
5322 | ;; visible (for whatever reason that's needed). The remaining issues | |
5323 | ;; should be taken care of by `fit-window-to-buffer'. | |
3d8daefe | 5324 | (when (and (window-combined-p window) |
6198ccd0 MR |
5325 | (pos-visible-in-window-p (point-min) window)) |
5326 | (fit-window-to-buffer window (window-total-size window)))) | |
5327 | \f | |
3c448ab6 MR |
5328 | (defun kill-buffer-and-window () |
5329 | "Kill the current buffer and delete the selected window." | |
5330 | (interactive) | |
5331 | (let ((window-to-delete (selected-window)) | |
5332 | (buffer-to-kill (current-buffer)) | |
6198ccd0 | 5333 | (delete-window-hook (lambda () (ignore-errors (delete-window))))) |
3c448ab6 MR |
5334 | (unwind-protect |
5335 | (progn | |
5336 | (add-hook 'kill-buffer-hook delete-window-hook t t) | |
5337 | (if (kill-buffer (current-buffer)) | |
5338 | ;; If `delete-window' failed before, we rerun it to regenerate | |
5339 | ;; the error so it can be seen in the echo area. | |
5340 | (when (eq (selected-window) window-to-delete) | |
5341 | (delete-window)))) | |
5342 | ;; If the buffer is not dead for some reason (probably because | |
5343 | ;; of a `quit' signal), remove the hook again. | |
6198ccd0 MR |
5344 | (ignore-errors |
5345 | (with-current-buffer buffer-to-kill | |
5346 | (remove-hook 'kill-buffer-hook delete-window-hook t)))))) | |
3c448ab6 | 5347 | |
74f806a1 | 5348 | \f |
3c448ab6 MR |
5349 | (defvar recenter-last-op nil |
5350 | "Indicates the last recenter operation performed. | |
0116abbd JL |
5351 | Possible values: `top', `middle', `bottom', integer or float numbers.") |
5352 | ||
5353 | (defcustom recenter-positions '(middle top bottom) | |
5354 | "Cycling order for `recenter-top-bottom'. | |
5355 | A list of elements with possible values `top', `middle', `bottom', | |
5356 | integer or float numbers that define the cycling order for | |
5357 | the command `recenter-top-bottom'. | |
5358 | ||
5359 | Top and bottom destinations are `scroll-margin' lines the from true | |
5360 | window top and bottom. Middle redraws the frame and centers point | |
5361 | vertically within the window. Integer number moves current line to | |
5362 | the specified absolute window-line. Float number between 0.0 and 1.0 | |
5363 | means the percentage of the screen space from the top. The default | |
5364 | cycling order is middle -> top -> bottom." | |
5365 | :type '(repeat (choice | |
5366 | (const :tag "Top" top) | |
5367 | (const :tag "Middle" middle) | |
5368 | (const :tag "Bottom" bottom) | |
5369 | (integer :tag "Line number") | |
5370 | (float :tag "Percentage"))) | |
5371 | :version "23.2" | |
5372 | :group 'windows) | |
3c448ab6 MR |
5373 | |
5374 | (defun recenter-top-bottom (&optional arg) | |
0116abbd JL |
5375 | "Move current buffer line to the specified window line. |
5376 | With no prefix argument, successive calls place point according | |
5377 | to the cycling order defined by `recenter-positions'. | |
3c448ab6 MR |
5378 | |
5379 | A prefix argument is handled like `recenter': | |
5380 | With numeric prefix ARG, move current line to window-line ARG. | |
0116abbd | 5381 | With plain `C-u', move current line to window center." |
3c448ab6 MR |
5382 | (interactive "P") |
5383 | (cond | |
0116abbd | 5384 | (arg (recenter arg)) ; Always respect ARG. |
3c448ab6 | 5385 | (t |
0116abbd JL |
5386 | (setq recenter-last-op |
5387 | (if (eq this-command last-command) | |
5388 | (car (or (cdr (member recenter-last-op recenter-positions)) | |
5389 | recenter-positions)) | |
5390 | (car recenter-positions))) | |
3c448ab6 MR |
5391 | (let ((this-scroll-margin |
5392 | (min (max 0 scroll-margin) | |
5393 | (truncate (/ (window-body-height) 4.0))))) | |
5394 | (cond ((eq recenter-last-op 'middle) | |
0116abbd | 5395 | (recenter)) |
3c448ab6 | 5396 | ((eq recenter-last-op 'top) |
0116abbd JL |
5397 | (recenter this-scroll-margin)) |
5398 | ((eq recenter-last-op 'bottom) | |
5399 | (recenter (- -1 this-scroll-margin))) | |
5400 | ((integerp recenter-last-op) | |
5401 | (recenter recenter-last-op)) | |
5402 | ((floatp recenter-last-op) | |
5403 | (recenter (round (* recenter-last-op (window-height)))))))))) | |
3c448ab6 MR |
5404 | |
5405 | (define-key global-map [?\C-l] 'recenter-top-bottom) | |
216349f8 | 5406 | |
216349f8 SM |
5407 | (defun move-to-window-line-top-bottom (&optional arg) |
5408 | "Position point relative to window. | |
5409 | ||
0f202d5d | 5410 | With a prefix argument ARG, acts like `move-to-window-line'. |
216349f8 SM |
5411 | |
5412 | With no argument, positions point at center of window. | |
0116abbd JL |
5413 | Successive calls position point at positions defined |
5414 | by `recenter-positions'." | |
216349f8 SM |
5415 | (interactive "P") |
5416 | (cond | |
0116abbd | 5417 | (arg (move-to-window-line arg)) ; Always respect ARG. |
216349f8 | 5418 | (t |
0116abbd JL |
5419 | (setq recenter-last-op |
5420 | (if (eq this-command last-command) | |
5421 | (car (or (cdr (member recenter-last-op recenter-positions)) | |
5422 | recenter-positions)) | |
5423 | (car recenter-positions))) | |
216349f8 SM |
5424 | (let ((this-scroll-margin |
5425 | (min (max 0 scroll-margin) | |
5426 | (truncate (/ (window-body-height) 4.0))))) | |
0f202d5d | 5427 | (cond ((eq recenter-last-op 'middle) |
0116abbd | 5428 | (call-interactively 'move-to-window-line)) |
0f202d5d | 5429 | ((eq recenter-last-op 'top) |
0116abbd JL |
5430 | (move-to-window-line this-scroll-margin)) |
5431 | ((eq recenter-last-op 'bottom) | |
5432 | (move-to-window-line (- -1 this-scroll-margin))) | |
5433 | ((integerp recenter-last-op) | |
5434 | (move-to-window-line recenter-last-op)) | |
5435 | ((floatp recenter-last-op) | |
5436 | (move-to-window-line (round (* recenter-last-op (window-height)))))))))) | |
216349f8 SM |
5437 | |
5438 | (define-key global-map [?\M-r] 'move-to-window-line-top-bottom) | |
3c448ab6 | 5439 | \f |
74f806a1 JL |
5440 | ;;; Scrolling commands. |
5441 | ||
5442 | ;;; Scrolling commands which does not signal errors at top/bottom | |
5443 | ;;; of buffer at first key-press (instead moves to top/bottom | |
5444 | ;;; of buffer). | |
5445 | ||
5446 | (defcustom scroll-error-top-bottom nil | |
5447 | "Move point to top/bottom of buffer before signalling a scrolling error. | |
5448 | A value of nil means just signal an error if no more scrolling possible. | |
5449 | A value of t means point moves to the beginning or the end of the buffer | |
5450 | \(depending on scrolling direction) when no more scrolling possible. | |
5451 | When point is already on that position, then signal an error." | |
5452 | :type 'boolean | |
5453 | :group 'scrolling | |
5454 | :version "24.1") | |
5455 | ||
5456 | (defun scroll-up-command (&optional arg) | |
5457 | "Scroll text of selected window upward ARG lines; or near full screen if no ARG. | |
5458 | If `scroll-error-top-bottom' is non-nil and `scroll-up' cannot | |
5459 | scroll window further, move cursor to the bottom line. | |
5460 | When point is already on that position, then signal an error. | |
5461 | A near full screen is `next-screen-context-lines' less than a full screen. | |
5462 | Negative ARG means scroll downward. | |
5463 | If ARG is the atom `-', scroll downward by nearly full screen." | |
5464 | (interactive "^P") | |
5465 | (cond | |
5466 | ((null scroll-error-top-bottom) | |
5467 | (scroll-up arg)) | |
5468 | ((eq arg '-) | |
5469 | (scroll-down-command nil)) | |
5470 | ((< (prefix-numeric-value arg) 0) | |
5471 | (scroll-down-command (- (prefix-numeric-value arg)))) | |
5472 | ((eobp) | |
5473 | (scroll-up arg)) ; signal error | |
5474 | (t | |
5475 | (condition-case nil | |
5476 | (scroll-up arg) | |
5477 | (end-of-buffer | |
5478 | (if arg | |
5479 | ;; When scrolling by ARG lines can't be done, | |
5480 | ;; move by ARG lines instead. | |
5481 | (forward-line arg) | |
5482 | ;; When ARG is nil for full-screen scrolling, | |
5483 | ;; move to the bottom of the buffer. | |
5484 | (goto-char (point-max)))))))) | |
5485 | ||
5486 | (put 'scroll-up-command 'scroll-command t) | |
5487 | ||
5488 | (defun scroll-down-command (&optional arg) | |
5489 | "Scroll text of selected window down ARG lines; or near full screen if no ARG. | |
5490 | If `scroll-error-top-bottom' is non-nil and `scroll-down' cannot | |
5491 | scroll window further, move cursor to the top line. | |
5492 | When point is already on that position, then signal an error. | |
5493 | A near full screen is `next-screen-context-lines' less than a full screen. | |
5494 | Negative ARG means scroll upward. | |
5495 | If ARG is the atom `-', scroll upward by nearly full screen." | |
5496 | (interactive "^P") | |
5497 | (cond | |
5498 | ((null scroll-error-top-bottom) | |
5499 | (scroll-down arg)) | |
5500 | ((eq arg '-) | |
5501 | (scroll-up-command nil)) | |
5502 | ((< (prefix-numeric-value arg) 0) | |
5503 | (scroll-up-command (- (prefix-numeric-value arg)))) | |
5504 | ((bobp) | |
5505 | (scroll-down arg)) ; signal error | |
5506 | (t | |
5507 | (condition-case nil | |
5508 | (scroll-down arg) | |
5509 | (beginning-of-buffer | |
5510 | (if arg | |
5511 | ;; When scrolling by ARG lines can't be done, | |
5512 | ;; move by ARG lines instead. | |
5513 | (forward-line (- arg)) | |
5514 | ;; When ARG is nil for full-screen scrolling, | |
5515 | ;; move to the top of the buffer. | |
5516 | (goto-char (point-min)))))))) | |
5517 | ||
5518 | (put 'scroll-down-command 'scroll-command t) | |
5519 | ||
5520 | ;;; Scrolling commands which scroll a line instead of full screen. | |
5521 | ||
5522 | (defun scroll-up-line (&optional arg) | |
5523 | "Scroll text of selected window upward ARG lines; or one line if no ARG. | |
5524 | If ARG is omitted or nil, scroll upward by one line. | |
5525 | This is different from `scroll-up-command' that scrolls a full screen." | |
5526 | (interactive "p") | |
5527 | (scroll-up (or arg 1))) | |
5528 | ||
5529 | (put 'scroll-up-line 'scroll-command t) | |
5530 | ||
5531 | (defun scroll-down-line (&optional arg) | |
5532 | "Scroll text of selected window down ARG lines; or one line if no ARG. | |
5533 | If ARG is omitted or nil, scroll down by one line. | |
5534 | This is different from `scroll-down-command' that scrolls a full screen." | |
5535 | (interactive "p") | |
5536 | (scroll-down (or arg 1))) | |
5537 | ||
5538 | (put 'scroll-down-line 'scroll-command t) | |
5539 | ||
5540 | \f | |
5541 | (defun scroll-other-window-down (lines) | |
5542 | "Scroll the \"other window\" down. | |
5543 | For more details, see the documentation for `scroll-other-window'." | |
5544 | (interactive "P") | |
5545 | (scroll-other-window | |
5546 | ;; Just invert the argument's meaning. | |
5547 | ;; We can do that without knowing which window it will be. | |
5548 | (if (eq lines '-) nil | |
5549 | (if (null lines) '- | |
5550 | (- (prefix-numeric-value lines)))))) | |
5551 | ||
5552 | (defun beginning-of-buffer-other-window (arg) | |
5553 | "Move point to the beginning of the buffer in the other window. | |
5554 | Leave mark at previous position. | |
5555 | With arg N, put point N/10 of the way from the true beginning." | |
5556 | (interactive "P") | |
5557 | (let ((orig-window (selected-window)) | |
5558 | (window (other-window-for-scrolling))) | |
5559 | ;; We use unwind-protect rather than save-window-excursion | |
5560 | ;; because the latter would preserve the things we want to change. | |
5561 | (unwind-protect | |
5562 | (progn | |
5563 | (select-window window) | |
5564 | ;; Set point and mark in that window's buffer. | |
5565 | (with-no-warnings | |
5566 | (beginning-of-buffer arg)) | |
5567 | ;; Set point accordingly. | |
5568 | (recenter '(t))) | |
5569 | (select-window orig-window)))) | |
5570 | ||
5571 | (defun end-of-buffer-other-window (arg) | |
5572 | "Move point to the end of the buffer in the other window. | |
5573 | Leave mark at previous position. | |
5574 | With arg N, put point N/10 of the way from the true end." | |
5575 | (interactive "P") | |
5576 | ;; See beginning-of-buffer-other-window for comments. | |
5577 | (let ((orig-window (selected-window)) | |
5578 | (window (other-window-for-scrolling))) | |
5579 | (unwind-protect | |
5580 | (progn | |
5581 | (select-window window) | |
5582 | (with-no-warnings | |
5583 | (end-of-buffer arg)) | |
5584 | (recenter '(t))) | |
5585 | (select-window orig-window)))) | |
74f806a1 | 5586 | \f |
3c448ab6 MR |
5587 | (defvar mouse-autoselect-window-timer nil |
5588 | "Timer used by delayed window autoselection.") | |
5589 | ||
5590 | (defvar mouse-autoselect-window-position nil | |
5591 | "Last mouse position recorded by delayed window autoselection.") | |
5592 | ||
5593 | (defvar mouse-autoselect-window-window nil | |
5594 | "Last window recorded by delayed window autoselection.") | |
5595 | ||
5596 | (defvar mouse-autoselect-window-state nil | |
5597 | "When non-nil, special state of delayed window autoselection. | |
5598 | Possible values are `suspend' \(suspend autoselection after a menu or | |
5599 | scrollbar interaction\) and `select' \(the next invocation of | |
5600 | 'handle-select-window' shall select the window immediately\).") | |
5601 | ||
5602 | (defun mouse-autoselect-window-cancel (&optional force) | |
5603 | "Cancel delayed window autoselection. | |
5604 | Optional argument FORCE means cancel unconditionally." | |
5605 | (unless (and (not force) | |
5606 | ;; Don't cancel for select-window or select-frame events | |
5607 | ;; or when the user drags a scroll bar. | |
5608 | (or (memq this-command | |
5609 | '(handle-select-window handle-switch-frame)) | |
5610 | (and (eq this-command 'scroll-bar-toolkit-scroll) | |
5611 | (memq (nth 4 (event-end last-input-event)) | |
5612 | '(handle end-scroll))))) | |
5613 | (setq mouse-autoselect-window-state nil) | |
5614 | (when (timerp mouse-autoselect-window-timer) | |
5615 | (cancel-timer mouse-autoselect-window-timer)) | |
5616 | (remove-hook 'pre-command-hook 'mouse-autoselect-window-cancel))) | |
5617 | ||
5618 | (defun mouse-autoselect-window-start (mouse-position &optional window suspend) | |
5619 | "Start delayed window autoselection. | |
5620 | MOUSE-POSITION is the last position where the mouse was seen as returned | |
5621 | by `mouse-position'. Optional argument WINDOW non-nil denotes the | |
5622 | window where the mouse was seen. Optional argument SUSPEND non-nil | |
5623 | means suspend autoselection." | |
5624 | ;; Record values for MOUSE-POSITION, WINDOW, and SUSPEND. | |
5625 | (setq mouse-autoselect-window-position mouse-position) | |
5626 | (when window (setq mouse-autoselect-window-window window)) | |
5627 | (setq mouse-autoselect-window-state (when suspend 'suspend)) | |
5628 | ;; Install timer which runs `mouse-autoselect-window-select' after | |
5629 | ;; `mouse-autoselect-window' seconds. | |
5630 | (setq mouse-autoselect-window-timer | |
5631 | (run-at-time | |
5632 | (abs mouse-autoselect-window) nil 'mouse-autoselect-window-select))) | |
5633 | ||
5634 | (defun mouse-autoselect-window-select () | |
5635 | "Select window with delayed window autoselection. | |
5636 | If the mouse position has stabilized in a non-selected window, select | |
5637 | that window. The minibuffer window is selected only if the minibuffer is | |
5638 | active. This function is run by `mouse-autoselect-window-timer'." | |
6198ccd0 MR |
5639 | (ignore-errors |
5640 | (let* ((mouse-position (mouse-position)) | |
5641 | (window | |
5642 | (ignore-errors | |
5643 | (window-at (cadr mouse-position) (cddr mouse-position) | |
5644 | (car mouse-position))))) | |
5645 | (cond | |
5646 | ((or (menu-or-popup-active-p) | |
5647 | (and window | |
5648 | (not (coordinates-in-window-p (cdr mouse-position) window)))) | |
5649 | ;; A menu / popup dialog is active or the mouse is on the scroll-bar | |
5650 | ;; of WINDOW, temporarily suspend delayed autoselection. | |
5651 | (mouse-autoselect-window-start mouse-position nil t)) | |
5652 | ((eq mouse-autoselect-window-state 'suspend) | |
5653 | ;; Delayed autoselection was temporarily suspended, reenable it. | |
5654 | (mouse-autoselect-window-start mouse-position)) | |
5655 | ((and window (not (eq window (selected-window))) | |
5656 | (or (not (numberp mouse-autoselect-window)) | |
5657 | (and (> mouse-autoselect-window 0) | |
5658 | ;; If `mouse-autoselect-window' is positive, select | |
5659 | ;; window if the window is the same as before. | |
5660 | (eq window mouse-autoselect-window-window)) | |
5661 | ;; Otherwise select window if the mouse is at the same | |
5662 | ;; position as before. Observe that the first test after | |
5663 | ;; starting autoselection usually fails since the value of | |
5664 | ;; `mouse-autoselect-window-position' recorded there is the | |
5665 | ;; position where the mouse has entered the new window and | |
5666 | ;; not necessarily where the mouse has stopped moving. | |
5667 | (equal mouse-position mouse-autoselect-window-position)) | |
5668 | ;; The minibuffer is a candidate window if it's active. | |
5669 | (or (not (window-minibuffer-p window)) | |
5670 | (eq window (active-minibuffer-window)))) | |
5671 | ;; Mouse position has stabilized in non-selected window: Cancel | |
5672 | ;; delayed autoselection and try to select that window. | |
5673 | (mouse-autoselect-window-cancel t) | |
5674 | ;; Select window where mouse appears unless the selected window is the | |
5675 | ;; minibuffer. Use `unread-command-events' in order to execute pre- | |
5676 | ;; and post-command hooks and trigger idle timers. To avoid delaying | |
5677 | ;; autoselection again, set `mouse-autoselect-window-state'." | |
5678 | (unless (window-minibuffer-p (selected-window)) | |
5679 | (setq mouse-autoselect-window-state 'select) | |
5680 | (setq unread-command-events | |
5681 | (cons (list 'select-window (list window)) | |
5682 | unread-command-events)))) | |
5683 | ((or (and window (eq window (selected-window))) | |
5684 | (not (numberp mouse-autoselect-window)) | |
5685 | (equal mouse-position mouse-autoselect-window-position)) | |
5686 | ;; Mouse position has either stabilized in the selected window or at | |
5687 | ;; `mouse-autoselect-window-position': Cancel delayed autoselection. | |
5688 | (mouse-autoselect-window-cancel t)) | |
5689 | (t | |
5690 | ;; Mouse position has not stabilized yet, resume delayed | |
5691 | ;; autoselection. | |
5692 | (mouse-autoselect-window-start mouse-position window)))))) | |
3c448ab6 MR |
5693 | |
5694 | (defun handle-select-window (event) | |
5695 | "Handle select-window events." | |
5696 | (interactive "e") | |
5697 | (let ((window (posn-window (event-start event)))) | |
5698 | (unless (or (not (window-live-p window)) | |
5699 | ;; Don't switch if we're currently in the minibuffer. | |
5700 | ;; This tries to work around problems where the | |
5701 | ;; minibuffer gets unselected unexpectedly, and where | |
5702 | ;; you then have to move your mouse all the way down to | |
5703 | ;; the minibuffer to select it. | |
5704 | (window-minibuffer-p (selected-window)) | |
5705 | ;; Don't switch to minibuffer window unless it's active. | |
5706 | (and (window-minibuffer-p window) | |
5707 | (not (minibuffer-window-active-p window))) | |
5708 | ;; Don't switch when autoselection shall be delayed. | |
5709 | (and (numberp mouse-autoselect-window) | |
5710 | (not (zerop mouse-autoselect-window)) | |
5711 | (not (eq mouse-autoselect-window-state 'select)) | |
5712 | (progn | |
5713 | ;; Cancel any delayed autoselection. | |
5714 | (mouse-autoselect-window-cancel t) | |
5715 | ;; Start delayed autoselection from current mouse | |
5716 | ;; position and window. | |
5717 | (mouse-autoselect-window-start (mouse-position) window) | |
5718 | ;; Executing a command cancels delayed autoselection. | |
5719 | (add-hook | |
5720 | 'pre-command-hook 'mouse-autoselect-window-cancel)))) | |
5721 | (when mouse-autoselect-window | |
5722 | ;; Reset state of delayed autoselection. | |
5723 | (setq mouse-autoselect-window-state nil) | |
5724 | ;; Run `mouse-leave-buffer-hook' when autoselecting window. | |
5725 | (run-hooks 'mouse-leave-buffer-hook)) | |
5726 | (select-window window)))) | |
5727 | ||
3c448ab6 MR |
5728 | (defun truncated-partial-width-window-p (&optional window) |
5729 | "Return non-nil if lines in WINDOW are specifically truncated due to its width. | |
5730 | WINDOW defaults to the selected window. | |
5731 | Return nil if WINDOW is not a partial-width window | |
5732 | (regardless of the value of `truncate-lines'). | |
5733 | Otherwise, consult the value of `truncate-partial-width-windows' | |
5734 | for the buffer shown in WINDOW." | |
5735 | (unless window | |
5736 | (setq window (selected-window))) | |
5737 | (unless (window-full-width-p window) | |
5738 | (let ((t-p-w-w (buffer-local-value 'truncate-partial-width-windows | |
5739 | (window-buffer window)))) | |
5740 | (if (integerp t-p-w-w) | |
5741 | (< (window-width window) t-p-w-w) | |
5742 | t-p-w-w)))) | |
562dd5e9 | 5743 | \f |
59ee0542 GM |
5744 | ;; Some of these are in tutorial--default-keys, so update that if you |
5745 | ;; change these. | |
562dd5e9 MR |
5746 | (define-key ctl-x-map "0" 'delete-window) |
5747 | (define-key ctl-x-map "1" 'delete-other-windows) | |
2d197ffb CY |
5748 | (define-key ctl-x-map "2" 'split-window-below) |
5749 | (define-key ctl-x-map "3" 'split-window-right) | |
9397e56f | 5750 | (define-key ctl-x-map "o" 'other-window) |
562dd5e9 | 5751 | (define-key ctl-x-map "^" 'enlarge-window) |
3c448ab6 MR |
5752 | (define-key ctl-x-map "}" 'enlarge-window-horizontally) |
5753 | (define-key ctl-x-map "{" 'shrink-window-horizontally) | |
5754 | (define-key ctl-x-map "-" 'shrink-window-if-larger-than-buffer) | |
5755 | (define-key ctl-x-map "+" 'balance-windows) | |
5756 | (define-key ctl-x-4-map "0" 'kill-buffer-and-window) | |
5757 | ||
3c448ab6 | 5758 | ;;; window.el ends here |