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55535639 PJ |
1 | ;;; custom.el --- tools for declaring and initializing options |
2 | ;; | |
97cc3d15 EZ |
3 | ;; Copyright (C) 1996, 1997, 1999, 2001, 2002, 2004 |
4 | ;; Free Software Foundation, Inc. | |
55535639 PJ |
5 | ;; |
6 | ;; Author: Per Abrahamsen <abraham@dina.kvl.dk> | |
7 | ;; Maintainer: FSF | |
8 | ;; Keywords: help, faces | |
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 2, or (at your option) | |
15 | ;; 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; see the file COPYING. If not, write to the | |
24 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
25 | ;; Boston, MA 02111-1307, USA. | |
26 | ||
27 | ;;; Commentary: | |
28 | ;; | |
e6bb31f3 | 29 | ;; This file only contains the code needed to declare and initialize |
55535639 PJ |
30 | ;; user options. The code to customize options is autoloaded from |
31 | ;; `cus-edit.el' and is documented in the Emacs Lisp Reference manual. | |
32 | ||
e6bb31f3 | 33 | ;; The code implementing face declarations is in `cus-face.el'. |
55535639 PJ |
34 | |
35 | ;;; Code: | |
36 | ||
37 | (require 'widget) | |
38 | ||
39 | (defvar custom-define-hook nil | |
40 | ;; Customize information for this option is in `cus-edit.el'. | |
41 | "Hook called after defining each customize option.") | |
42 | ||
6da43544 RS |
43 | (defvar custom-dont-initialize nil |
44 | "Non-nil means `defcustom' should not initialize the variable. | |
45 | That is used for the sake of `custom-make-dependencies'. | |
46 | Users should not set it.") | |
47 | ||
d3b80e9b SM |
48 | (defvar custom-current-group-alist nil |
49 | "Alist of (FILE . GROUP) indicating the current group to use for FILE.") | |
50 | ||
55535639 PJ |
51 | ;;; The `defcustom' Macro. |
52 | ||
53 | (defun custom-initialize-default (symbol value) | |
54 | "Initialize SYMBOL with VALUE. | |
55 | This will do nothing if symbol already has a default binding. | |
56 | Otherwise, if symbol has a `saved-value' property, it will evaluate | |
494bcd27 | 57 | the car of that and use it as the default binding for symbol. |
55535639 PJ |
58 | Otherwise, VALUE will be evaluated and used as the default binding for |
59 | symbol." | |
60 | (unless (default-boundp symbol) | |
61 | ;; Use the saved value if it exists, otherwise the standard setting. | |
62 | (set-default symbol (if (get symbol 'saved-value) | |
63 | (eval (car (get symbol 'saved-value))) | |
64 | (eval value))))) | |
65 | ||
66 | (defun custom-initialize-set (symbol value) | |
67 | "Initialize SYMBOL based on VALUE. | |
68 | If the symbol doesn't have a default binding already, | |
69 | then set it using its `:set' function (or `set-default' if it has none). | |
70 | The value is either the value in the symbol's `saved-value' property, | |
71 | if any, or VALUE." | |
72 | (unless (default-boundp symbol) | |
73 | (funcall (or (get symbol 'custom-set) 'set-default) | |
74 | symbol | |
75 | (if (get symbol 'saved-value) | |
76 | (eval (car (get symbol 'saved-value))) | |
77 | (eval value))))) | |
78 | ||
79 | (defun custom-initialize-reset (symbol value) | |
80 | "Initialize SYMBOL based on VALUE. | |
81 | Set the symbol, using its `:set' function (or `set-default' if it has none). | |
82 | The value is either the symbol's current value | |
83 | \(as obtained using the `:get' function), if any, | |
84 | or the value in the symbol's `saved-value' property if any, | |
85 | or (last of all) VALUE." | |
86 | (funcall (or (get symbol 'custom-set) 'set-default) | |
87 | symbol | |
88 | (cond ((default-boundp symbol) | |
89 | (funcall (or (get symbol 'custom-get) 'default-value) | |
90 | symbol)) | |
91 | ((get symbol 'saved-value) | |
92 | (eval (car (get symbol 'saved-value)))) | |
93 | (t | |
94 | (eval value))))) | |
95 | ||
96 | (defun custom-initialize-changed (symbol value) | |
97 | "Initialize SYMBOL with VALUE. | |
98 | Like `custom-initialize-reset', but only use the `:set' function if | |
99 | not using the standard setting. | |
100 | For the standard setting, use `set-default'." | |
101 | (cond ((default-boundp symbol) | |
102 | (funcall (or (get symbol 'custom-set) 'set-default) | |
103 | symbol | |
104 | (funcall (or (get symbol 'custom-get) 'default-value) | |
105 | symbol))) | |
106 | ((get symbol 'saved-value) | |
107 | (funcall (or (get symbol 'custom-set) 'set-default) | |
108 | symbol | |
109 | (eval (car (get symbol 'saved-value))))) | |
110 | (t | |
111 | (set-default symbol (eval value))))) | |
112 | ||
113 | (defun custom-declare-variable (symbol default doc &rest args) | |
114 | "Like `defcustom', but SYMBOL and DEFAULT are evaluated as normal arguments. | |
115 | DEFAULT should be an expression to evaluate to compute the default value, | |
e1bab181 RS |
116 | not the default value itself. |
117 | ||
118 | DEFAULT is stored as SYMBOL's value in the standard theme. See | |
119 | `custom-known-themes' for a list of known themes. For backwards | |
120 | compatibility, DEFAULT is also stored in SYMBOL's property | |
121 | `standard-value'. At the same time, SYMBOL's property `force-value' is | |
122 | set to nil, as the value is no longer rogue." | |
123 | ;; Remember the standard setting. The value should be in the standard | |
124 | ;; theme, not in this property. However, his would require changeing | |
125 | ;; the C source of defvar and others as well... | |
55535639 PJ |
126 | (put symbol 'standard-value (list default)) |
127 | ;; Maybe this option was rogue in an earlier version. It no longer is. | |
128 | (when (get symbol 'force-value) | |
129 | (put symbol 'force-value nil)) | |
130 | (when doc | |
131 | (put symbol 'variable-documentation doc)) | |
132 | (let ((initialize 'custom-initialize-reset) | |
133 | (requests nil)) | |
d3b80e9b SM |
134 | (unless (memq :group args) |
135 | (custom-add-to-group (custom-current-group) symbol 'custom-variable)) | |
55535639 PJ |
136 | (while args |
137 | (let ((arg (car args))) | |
138 | (setq args (cdr args)) | |
139 | (unless (symbolp arg) | |
140 | (error "Junk in args %S" args)) | |
141 | (let ((keyword arg) | |
142 | (value (car args))) | |
143 | (unless args | |
144 | (error "Keyword %s is missing an argument" keyword)) | |
145 | (setq args (cdr args)) | |
146 | (cond ((eq keyword :initialize) | |
147 | (setq initialize value)) | |
148 | ((eq keyword :set) | |
149 | (put symbol 'custom-set value)) | |
150 | ((eq keyword :get) | |
151 | (put symbol 'custom-get value)) | |
152 | ((eq keyword :require) | |
6f0d61bf | 153 | (push value requests)) |
55535639 PJ |
154 | ((eq keyword :type) |
155 | (put symbol 'custom-type (purecopy value))) | |
156 | ((eq keyword :options) | |
157 | (if (get symbol 'custom-options) | |
158 | ;; Slow safe code to avoid duplicates. | |
159 | (mapc (lambda (option) | |
160 | (custom-add-option symbol option)) | |
6f0d61bf | 161 | value) |
55535639 PJ |
162 | ;; Fast code for the common case. |
163 | (put symbol 'custom-options (copy-sequence value)))) | |
164 | (t | |
165 | (custom-handle-keyword symbol keyword value | |
166 | 'custom-variable)))))) | |
167 | (put symbol 'custom-requests requests) | |
168 | ;; Do the actual initialization. | |
6da43544 RS |
169 | (unless custom-dont-initialize |
170 | (funcall initialize symbol default))) | |
6f0d61bf | 171 | (push (cons 'defvar symbol) current-load-list) |
55535639 PJ |
172 | (run-hooks 'custom-define-hook) |
173 | symbol) | |
174 | ||
175 | (defmacro defcustom (symbol value doc &rest args) | |
176 | "Declare SYMBOL as a customizable variable that defaults to VALUE. | |
177 | DOC is the variable documentation. | |
178 | ||
494bcd27 | 179 | Neither SYMBOL nor VALUE need to be quoted. |
55535639 PJ |
180 | If SYMBOL is not already bound, initialize it to VALUE. |
181 | The remaining arguments should have the form | |
182 | ||
183 | [KEYWORD VALUE]... | |
184 | ||
185 | The following keywords are meaningful: | |
186 | ||
693d0bd3 | 187 | :type VALUE should be a widget type for editing the symbol's value. |
55535639 PJ |
188 | :options VALUE should be a list of valid members of the widget type. |
189 | :group VALUE should be a customization group. | |
190 | Add SYMBOL to that group. | |
3dc5f18e | 191 | :link LINK-DATA |
00644b82 EZ |
192 | Include an external link after the documentation string for this |
193 | item. This is a sentence containing an active field which | |
194 | references some other documentation. | |
71296446 | 195 | |
00644b82 | 196 | There are three alternatives you can use for LINK-DATA: |
71296446 | 197 | |
3dc5f18e | 198 | (custom-manual INFO-NODE) |
00644b82 | 199 | Link to an Info node; INFO-NODE is a string which specifies |
3dc5f18e | 200 | the node name, as in \"(emacs)Top\". The link appears as |
00644b82 | 201 | `[manual]' in the customization buffer. |
71296446 | 202 | |
3dc5f18e | 203 | (info-link INFO-NODE) |
00644b82 EZ |
204 | Like `custom-manual' except that the link appears in the |
205 | customization buffer with the Info node name. | |
71296446 | 206 | |
3dc5f18e | 207 | (url-link URL) |
00644b82 EZ |
208 | Link to a web page; URL is a string which specifies the URL. |
209 | The link appears in the customization buffer as URL. | |
71296446 | 210 | |
00644b82 EZ |
211 | You can specify the text to use in the customization buffer by |
212 | adding `:tag NAME' after the first element of the LINK-DATA; for | |
3dc5f18e | 213 | example, (info-link :tag \"foo\" \"(emacs)Top\") makes a link to the |
00644b82 | 214 | Emacs manual which appears in the buffer as `foo'. |
71296446 | 215 | |
00644b82 EZ |
216 | An item can have more than one external link; however, most items |
217 | have none at all. | |
55535639 PJ |
218 | :initialize |
219 | VALUE should be a function used to initialize the | |
220 | variable. It takes two arguments, the symbol and value | |
221 | given in the `defcustom' call. The default is | |
a01639a3 | 222 | `custom-initialize-reset'. |
55535639 PJ |
223 | :set VALUE should be a function to set the value of the symbol. |
224 | It takes two arguments, the symbol to set and the value to | |
225 | give it. The default choice of function is `custom-set-default'. | |
226 | :get VALUE should be a function to extract the value of symbol. | |
227 | The function takes one argument, a symbol, and should return | |
228 | the current value for that symbol. The default choice of function | |
229 | is `custom-default-value'. | |
230 | :require | |
231 | VALUE should be a feature symbol. If you save a value | |
232 | for this option, then when your `.emacs' file loads the value, | |
233 | it does (require VALUE) first. | |
234 | :version | |
235 | VALUE should be a string specifying that the variable was | |
236 | first introduced, or its default value was changed, in Emacs | |
237 | version VERSION. | |
00644b82 EZ |
238 | :tag LABEL |
239 | Use LABEL, a string, instead of the item's name, to label the item | |
1c1da418 | 240 | in customization menus and buffers. |
00644b82 EZ |
241 | :load FILE |
242 | Load file FILE (a string) before displaying this customization | |
29512a0f | 243 | item. Loading is done with `load', and only if the file is |
00644b82 | 244 | not already loaded. |
64e9f9d9 DL |
245 | :set-after VARIABLES |
246 | Specifies that SYMBOL should be set after the list of variables | |
247 | VARIABLES when both have been customized. | |
55535639 PJ |
248 | |
249 | Read the section about customization in the Emacs Lisp manual for more | |
250 | information." | |
251 | ;; It is better not to use backquote in this file, | |
252 | ;; because that makes a bootstrapping problem | |
253 | ;; if you need to recompile all the Lisp files using interpreted code. | |
254 | (nconc (list 'custom-declare-variable | |
255 | (list 'quote symbol) | |
256 | (list 'quote value) | |
257 | doc) | |
258 | args)) | |
259 | ||
260 | ;;; The `defface' Macro. | |
261 | ||
262 | (defmacro defface (face spec doc &rest args) | |
263 | "Declare FACE as a customizable face that defaults to SPEC. | |
264 | FACE does not need to be quoted. | |
265 | ||
266 | Third argument DOC is the face documentation. | |
267 | ||
2a69edce | 268 | If FACE has been set with `custom-set-faces', set the face attributes |
55535639 PJ |
269 | as specified by that function, otherwise set the face attributes |
270 | according to SPEC. | |
271 | ||
272 | The remaining arguments should have the form | |
273 | ||
274 | [KEYWORD VALUE]... | |
275 | ||
276 | The following KEYWORDs are defined: | |
277 | ||
278 | :group VALUE should be a customization group. | |
279 | Add FACE to that group. | |
280 | ||
281 | SPEC should be an alist of the form ((DISPLAY ATTS)...). | |
282 | ||
283 | The first element of SPEC where the DISPLAY matches the frame | |
284 | is the one that takes effect in that frame. The ATTRs in this | |
285 | element take effect; the other elements are ignored, on that frame. | |
286 | ||
287 | ATTS is a list of face attributes followed by their values: | |
288 | (ATTR VALUE ATTR VALUE...) | |
289 | ||
290 | The possible attributes are `:family', `:width', `:height', `:weight', | |
291 | `:slant', `:underline', `:overline', `:strike-through', `:box', | |
3d58b15e | 292 | `:foreground', `:background', `:stipple', `:inverse-video', and `:inherit'. |
55535639 PJ |
293 | |
294 | DISPLAY can either be the symbol t, which will match all frames, or an | |
295 | alist of the form \((REQ ITEM...)...). For the DISPLAY to match a | |
296 | FRAME, the REQ property of the frame must match one of the ITEM. The | |
297 | following REQ are defined: | |
298 | ||
299 | `type' (the value of `window-system') | |
300 | Under X, in addition to the values `window-system' can take, | |
9b44aa8b JD |
301 | `motif', `lucid', `gtk' and `x-toolkit' are allowed, and match when |
302 | the Motif toolkit, Lucid toolkit, GTK toolkit or any X toolkit is in use. | |
55535639 PJ |
303 | |
304 | `class' (the frame's color support) | |
305 | Should be one of `color', `grayscale', or `mono'. | |
306 | ||
307 | `background' (what color is used for the background text) | |
308 | Should be one of `light' or `dark'. | |
309 | ||
6e166990 EZ |
310 | `min-colors' (the minimum number of colors the frame should support) |
311 | Should be an integer, it is compared with the result of | |
312 | `display-color-cells'. | |
313 | ||
55535639 PJ |
314 | Read the section about customization in the Emacs Lisp manual for more |
315 | information." | |
316 | ;; It is better not to use backquote in this file, | |
317 | ;; because that makes a bootstrapping problem | |
318 | ;; if you need to recompile all the Lisp files using interpreted code. | |
319 | (nconc (list 'custom-declare-face (list 'quote face) spec doc) args)) | |
320 | ||
321 | ;;; The `defgroup' Macro. | |
322 | ||
d3b80e9b SM |
323 | (defun custom-current-group () |
324 | (cdr (assoc load-file-name custom-current-group-alist))) | |
325 | ||
55535639 PJ |
326 | (defun custom-declare-group (symbol members doc &rest args) |
327 | "Like `defgroup', but SYMBOL is evaluated as a normal argument." | |
328 | (while members | |
329 | (apply 'custom-add-to-group symbol (car members)) | |
330 | (setq members (cdr members))) | |
55535639 PJ |
331 | (when doc |
332 | ;; This text doesn't get into DOC. | |
333 | (put symbol 'group-documentation (purecopy doc))) | |
334 | (while args | |
335 | (let ((arg (car args))) | |
336 | (setq args (cdr args)) | |
337 | (unless (symbolp arg) | |
338 | (error "Junk in args %S" args)) | |
339 | (let ((keyword arg) | |
340 | (value (car args))) | |
341 | (unless args | |
342 | (error "Keyword %s is missing an argument" keyword)) | |
343 | (setq args (cdr args)) | |
344 | (cond ((eq keyword :prefix) | |
345 | (put symbol 'custom-prefix value)) | |
346 | (t | |
347 | (custom-handle-keyword symbol keyword value | |
348 | 'custom-group)))))) | |
d3b80e9b SM |
349 | ;; Record the group on the `current' list. |
350 | (let ((elt (assoc load-file-name custom-current-group-alist))) | |
351 | (if elt (setcdr elt symbol) | |
352 | (push (cons load-file-name symbol) custom-current-group-alist))) | |
55535639 PJ |
353 | (run-hooks 'custom-define-hook) |
354 | symbol) | |
355 | ||
356 | (defmacro defgroup (symbol members doc &rest args) | |
357 | "Declare SYMBOL as a customization group containing MEMBERS. | |
358 | SYMBOL does not need to be quoted. | |
359 | ||
360 | Third arg DOC is the group documentation. | |
361 | ||
362 | MEMBERS should be an alist of the form ((NAME WIDGET)...) where | |
363 | NAME is a symbol and WIDGET is a widget for editing that symbol. | |
364 | Useful widgets are `custom-variable' for editing variables, | |
365 | `custom-face' for edit faces, and `custom-group' for editing groups. | |
366 | ||
367 | The remaining arguments should have the form | |
368 | ||
369 | [KEYWORD VALUE]... | |
370 | ||
371 | The following KEYWORDs are defined: | |
372 | ||
373 | :group VALUE should be a customization group. | |
374 | Add SYMBOL to that group. | |
375 | ||
376 | :version VALUE should be a string specifying that the group was introduced | |
377 | in Emacs version VERSION. | |
378 | ||
379 | Read the section about customization in the Emacs Lisp manual for more | |
380 | information." | |
381 | ;; It is better not to use backquote in this file, | |
382 | ;; because that makes a bootstrapping problem | |
383 | ;; if you need to recompile all the Lisp files using interpreted code. | |
384 | (nconc (list 'custom-declare-group (list 'quote symbol) members doc) args)) | |
385 | ||
386 | (defun custom-add-to-group (group option widget) | |
387 | "To existing GROUP add a new OPTION of type WIDGET. | |
388 | If there already is an entry for OPTION and WIDGET, nothing is done." | |
389 | (let ((members (get group 'custom-group)) | |
390 | (entry (list option widget))) | |
391 | (unless (member entry members) | |
392 | (put group 'custom-group (nconc members (list entry)))))) | |
393 | ||
29512a0f SM |
394 | (defun custom-group-of-mode (mode) |
395 | "Return the custom group corresponding to the major or minor MODE. | |
396 | If no such group is found, return nil." | |
397 | (or (get mode 'custom-mode-group) | |
398 | (if (or (get mode 'custom-group) | |
399 | (and (string-match "-mode\\'" (symbol-name mode)) | |
400 | (get (setq mode (intern (substring (symbol-name mode) | |
401 | 0 (match-beginning 0)))) | |
402 | 'custom-group))) | |
403 | mode))) | |
404 | ||
55535639 PJ |
405 | ;;; Properties. |
406 | ||
407 | (defun custom-handle-all-keywords (symbol args type) | |
408 | "For customization option SYMBOL, handle keyword arguments ARGS. | |
409 | Third argument TYPE is the custom option type." | |
d3b80e9b | 410 | (unless (memq :group args) |
9b6098b9 | 411 | (custom-add-to-group (custom-current-group) symbol type)) |
55535639 PJ |
412 | (while args |
413 | (let ((arg (car args))) | |
414 | (setq args (cdr args)) | |
415 | (unless (symbolp arg) | |
416 | (error "Junk in args %S" args)) | |
417 | (let ((keyword arg) | |
418 | (value (car args))) | |
419 | (unless args | |
420 | (error "Keyword %s is missing an argument" keyword)) | |
421 | (setq args (cdr args)) | |
422 | (custom-handle-keyword symbol keyword value type))))) | |
423 | ||
424 | (defun custom-handle-keyword (symbol keyword value type) | |
425 | "For customization option SYMBOL, handle KEYWORD with VALUE. | |
426 | Fourth argument TYPE is the custom option type." | |
427 | (if purify-flag | |
428 | (setq value (purecopy value))) | |
429 | (cond ((eq keyword :group) | |
430 | (custom-add-to-group value symbol type)) | |
431 | ((eq keyword :version) | |
432 | (custom-add-version symbol value)) | |
433 | ((eq keyword :link) | |
434 | (custom-add-link symbol value)) | |
435 | ((eq keyword :load) | |
436 | (custom-add-load symbol value)) | |
437 | ((eq keyword :tag) | |
438 | (put symbol 'custom-tag value)) | |
439 | ((eq keyword :set-after) | |
440 | (custom-add-dependencies symbol value)) | |
441 | (t | |
442 | (error "Unknown keyword %s" keyword)))) | |
443 | ||
444 | (defun custom-add-dependencies (symbol value) | |
445 | "To the custom option SYMBOL, add dependencies specified by VALUE. | |
446 | VALUE should be a list of symbols. For each symbol in that list, | |
447 | this specifies that SYMBOL should be set after the specified symbol, if | |
448 | both appear in constructs like `custom-set-variables'." | |
449 | (unless (listp value) | |
450 | (error "Invalid custom dependency `%s'" value)) | |
451 | (let* ((deps (get symbol 'custom-dependencies)) | |
452 | (new-deps deps)) | |
453 | (while value | |
454 | (let ((dep (car value))) | |
455 | (unless (symbolp dep) | |
456 | (error "Invalid custom dependency `%s'" dep)) | |
457 | (unless (memq dep new-deps) | |
458 | (setq new-deps (cons dep new-deps))) | |
459 | (setq value (cdr value)))) | |
460 | (unless (eq deps new-deps) | |
461 | (put symbol 'custom-dependencies new-deps)))) | |
e1bab181 | 462 | |
55535639 PJ |
463 | (defun custom-add-option (symbol option) |
464 | "To the variable SYMBOL add OPTION. | |
465 | ||
466 | If SYMBOL is a hook variable, OPTION should be a hook member. | |
467 | For other types variables, the effect is undefined." | |
468 | (let ((options (get symbol 'custom-options))) | |
469 | (unless (member option options) | |
470 | (put symbol 'custom-options (cons option options))))) | |
471 | ||
472 | (defun custom-add-link (symbol widget) | |
473 | "To the custom option SYMBOL add the link WIDGET." | |
474 | (let ((links (get symbol 'custom-links))) | |
475 | (unless (member widget links) | |
476 | (put symbol 'custom-links (cons (purecopy widget) links))))) | |
477 | ||
478 | (defun custom-add-version (symbol version) | |
479 | "To the custom option SYMBOL add the version VERSION." | |
480 | (put symbol 'custom-version (purecopy version))) | |
481 | ||
482 | (defun custom-add-load (symbol load) | |
483 | "To the custom option SYMBOL add the dependency LOAD. | |
484 | LOAD should be either a library file name, or a feature name." | |
485 | (let ((loads (get symbol 'custom-loads))) | |
486 | (unless (member load loads) | |
487 | (put symbol 'custom-loads (cons (purecopy load) loads))))) | |
488 | ||
1669290d MR |
489 | (defun custom-autoload (symbol load) |
490 | "Mark SYMBOL as autoloaded custom variable and add dependency LOAD." | |
491 | (put symbol 'custom-autoload t) | |
492 | (custom-add-load symbol load)) | |
493 | ||
494 | ;; This test is also in the C code of `user-variable-p'. | |
495 | (defun custom-variable-p (variable) | |
496 | "Return non-nil if VARIABLE is a custom variable." | |
497 | (or (get variable 'standard-value) | |
498 | (get variable 'custom-autoload))) | |
499 | ||
8f772dfd RS |
500 | ;;; Loading files needed to customize a symbol. |
501 | ;;; This is in custom.el because menu-bar.el needs it for toggle cmds. | |
502 | ||
503 | (defvar custom-load-recursion nil | |
504 | "Hack to avoid recursive dependencies.") | |
505 | ||
506 | (defun custom-load-symbol (symbol) | |
507 | "Load all dependencies for SYMBOL." | |
508 | (unless custom-load-recursion | |
29512a0f | 509 | (let ((custom-load-recursion t)) |
a8c78057 RS |
510 | ;; Load these files if not already done, |
511 | ;; to make sure we know all the dependencies of SYMBOL. | |
512 | (condition-case nil | |
513 | (require 'cus-load) | |
514 | (error nil)) | |
515 | (condition-case nil | |
516 | (require 'cus-start) | |
517 | (error nil)) | |
29512a0f SM |
518 | (dolist (load (get symbol 'custom-loads)) |
519 | (cond ((symbolp load) (condition-case nil (require load) (error nil))) | |
520 | ;; This is subsumed by the test below, but it's much faster. | |
8f772dfd RS |
521 | ((assoc load load-history)) |
522 | ;; This was just (assoc (locate-library load) load-history) | |
523 | ;; but has been optimized not to load locate-library | |
524 | ;; if not necessary. | |
29512a0f SM |
525 | ((let ((regexp (concat "\\(\\`\\|/\\)" (regexp-quote load) |
526 | "\\(\\'\\|\\.\\)")) | |
527 | (found nil)) | |
8f772dfd | 528 | (dolist (loaded load-history) |
c3891447 RS |
529 | (and (stringp (car loaded)) |
530 | (string-match regexp (car loaded)) | |
8f772dfd RS |
531 | (setq found t))) |
532 | found)) | |
533 | ;; Without this, we would load cus-edit recursively. | |
534 | ;; We are still loading it when we call this, | |
535 | ;; and it is not in load-history yet. | |
536 | ((equal load "cus-edit")) | |
29512a0f | 537 | (t (condition-case nil (load load) (error nil)))))))) |
8f772dfd | 538 | |
e1bab181 RS |
539 | (defvar custom-known-themes '(user standard) |
540 | "Themes that have been define with `deftheme'. | |
541 | The default value is the list (user standard). The theme `standard' | |
542 | contains the Emacs standard settings from the original Lisp files. The | |
543 | theme `user' contains all the the settings the user customized and saved. | |
544 | Additional themes declared with the `deftheme' macro will be added to | |
545 | the front of this list.") | |
546 | ||
547 | (defun custom-declare-theme (theme feature &optional doc &rest args) | |
548 | "Like `deftheme', but THEME is evaluated as a normal argument. | |
549 | FEATURE is the feature this theme provides. This symbol is created | |
550 | from THEME by `custom-make-theme-feature'." | |
551 | (add-to-list 'custom-known-themes theme) | |
552 | (put theme 'theme-feature feature) | |
553 | (when doc | |
554 | (put theme 'theme-documentation doc)) | |
555 | (while args | |
556 | (let ((arg (car args))) | |
557 | (setq args (cdr args)) | |
558 | (unless (symbolp arg) | |
559 | (error "Junk in args %S" args)) | |
560 | (let ((keyword arg) | |
561 | (value (car args))) | |
562 | (unless args | |
563 | (error "Keyword %s is missing an argument" keyword)) | |
564 | (setq args (cdr args)) | |
565 | (cond ((eq keyword :short-description) | |
7f9b6322 | 566 | (put theme 'theme-short-description value)) |
e1bab181 | 567 | ((eq keyword :immediate) |
7f9b6322 | 568 | (put theme 'theme-immediate value)) |
e1bab181 | 569 | ((eq keyword :variable-set-string) |
7f9b6322 | 570 | (put theme 'theme-variable-set-string value)) |
e1bab181 | 571 | ((eq keyword :variable-reset-string) |
7f9b6322 | 572 | (put theme 'theme-variable-reset-string value)) |
e1bab181 | 573 | ((eq keyword :face-set-string) |
7f9b6322 | 574 | (put theme 'theme-face-set-string value)) |
e1bab181 | 575 | ((eq keyword :face-reset-string) |
7f9b6322 | 576 | (put theme 'theme-face-reset-string value))))))) |
e1bab181 RS |
577 | |
578 | (defmacro deftheme (theme &optional doc &rest args) | |
579 | "Declare custom theme THEME. | |
580 | The optional argument DOC is a doc string describing the theme. | |
581 | The remaining arguments should have the form | |
582 | ||
583 | [KEYWORD VALUE]... | |
584 | ||
585 | The following KEYWORD's are defined: | |
586 | ||
587 | :short-description | |
588 | VALUE is a short (one line) description of the theme. If not | |
589 | given, DOC is used. | |
590 | :immediate | |
591 | If VALUE is non-nil, variables specified in this theme are set | |
592 | immediately when loading the theme. | |
593 | :variable-set-string | |
594 | VALUE is a string used to indicate that a variable takes its | |
595 | setting from this theme. It is passed to FORMAT with the name | |
596 | of the theme as an additional argument. If not given, a | |
597 | generic description is used. | |
598 | :variable-reset-string | |
599 | VALUE is a string used in the case a variable has been forced | |
600 | to its value in this theme. It is passed to FORMAT with the | |
601 | name of the theme as an additional argument. If not given, a | |
602 | generic description is used. | |
603 | :face-set-string | |
604 | VALUE is a string used to indicate that a face takes its | |
605 | setting from this theme. It is passed to FORMAT with the name | |
606 | of the theme as an additional argument. If not given, a | |
607 | generic description is used. | |
608 | :face-reset-string | |
609 | VALUE is a string used in the case a face has been forced to | |
610 | its value in this theme. It is passed to FORMAT with the name | |
611 | of the theme as an additional argument. If not given, a | |
612 | generic description is used. | |
613 | ||
614 | Any theme `foo' should be defined in a file called `foo-theme.el'; | |
615 | see `custom-make-theme-feature' for more information." | |
616 | (let ((feature (custom-make-theme-feature theme))) | |
617 | ;; It is better not to use backquote in this file, | |
618 | ;; because that makes a bootstrapping problem | |
619 | ;; if you need to recompile all the Lisp files using interpreted code. | |
620 | (nconc (list 'custom-declare-theme | |
621 | (list 'quote theme) | |
622 | (list 'quote feature) | |
623 | doc) args))) | |
624 | ||
625 | (defun custom-make-theme-feature (theme) | |
626 | "Given a symbol THEME, create a new symbol by appending \"-theme\". | |
627 | Store this symbol in the `theme-feature' property of THEME. | |
628 | Calling `provide-theme' to provide THEME actually puts `THEME-theme' | |
629 | into `features'. | |
630 | ||
631 | This allows for a file-name convention for autoloading themes: | |
632 | Every theme X has a property `provide-theme' whose value is \"X-theme\". | |
633 | \(require-theme X) then attempts to load the file `X-theme.el'." | |
634 | (intern (concat (symbol-name theme) "-theme"))) | |
635 | ||
636 | (defsubst custom-theme-p (theme) | |
637 | "Non-nil when THEME has been defined." | |
638 | (memq theme custom-known-themes)) | |
639 | ||
640 | (defsubst custom-check-theme (theme) | |
641 | "Check whether THEME is valid, and signal an error if it is not." | |
642 | (unless (custom-theme-p theme) | |
643 | (error "Unknown theme `%s'" theme))) | |
644 | ||
55535639 PJ |
645 | ;;; Initializing. |
646 | ||
e1bab181 RS |
647 | (defun custom-push-theme (prop symbol theme mode value) |
648 | "Add (THEME MODE VALUE) to the list in property PROP of SYMBOL. | |
649 | If the first element in that list is already (THEME ...), | |
650 | discard it first. | |
651 | ||
652 | MODE can be either the symbol `set' or the symbol `reset'. If it is the | |
653 | symbol `set', then VALUE is the value to use. If it is the symbol | |
654 | `reset', then VALUE is the mode to query instead. | |
655 | ||
656 | In the following example for the variable `goto-address-url-face', the | |
657 | theme `subtle-hacker' uses the same value for the variable as the theme | |
658 | `gnome2': | |
659 | ||
660 | \((standard set bold) | |
661 | \(gnome2 set info-xref) | |
662 | \(jonadab set underline) | |
663 | \(subtle-hacker reset gnome2)) | |
664 | ||
665 | ||
666 | If a value has been stored for themes A B and C, and a new value | |
667 | is to be stored for theme C, then the old value of C is discarded. | |
668 | If a new value is to be stored for theme B, however, the old value | |
669 | of B is not discarded because B is not the car of the list. | |
670 | ||
671 | For variables, list property PROP is `theme-value'. | |
672 | For faces, list property PROP is `theme-face'. | |
673 | This is used in `custom-do-theme-reset', for example. | |
674 | ||
675 | The list looks the same in any case; the examples shows a possible | |
676 | value of the `theme-face' property for the face `region': | |
677 | ||
678 | \((gnome2 set ((t (:foreground \"cyan\" :background \"dark cyan\")))) | |
679 | \(standard set ((((class color) (background dark)) | |
680 | \(:background \"blue\")) | |
681 | \(t (:background \"gray\"))))) | |
682 | ||
683 | This records values for the `standard' and the `gnome2' themes. | |
684 | The user has not customized the face; had he done that, | |
685 | the list would contain an entry for the `user' theme, too. | |
686 | See `custom-known-themes' for a list of known themes." | |
687 | (let ((old (get symbol prop))) | |
688 | (if (eq (car-safe (car-safe old)) theme) | |
689 | (setq old (cdr old))) | |
690 | (put symbol prop (cons (list theme mode value) old)))) | |
691 | ||
55535639 PJ |
692 | (defvar custom-local-buffer nil |
693 | "Non-nil, in a Customization buffer, means customize a specific buffer. | |
694 | If this variable is non-nil, it should be a buffer, | |
695 | and it means customize the local bindings of that buffer. | |
696 | This variable is a permanent local, and it normally has a local binding | |
697 | in every Customization buffer.") | |
698 | (put 'custom-local-buffer 'permanent-local t) | |
699 | ||
700 | (defun custom-set-variables (&rest args) | |
701 | "Initialize variables according to user preferences. | |
e1bab181 | 702 | The settings are registered as theme `user'. |
64e9f9d9 | 703 | The arguments should each be a list of the form: |
55535639 PJ |
704 | |
705 | (SYMBOL VALUE [NOW [REQUEST [COMMENT]]]) | |
706 | ||
707 | The unevaluated VALUE is stored as the saved value for SYMBOL. | |
708 | If NOW is present and non-nil, VALUE is also evaluated and bound as | |
709 | the default value for the SYMBOL. | |
e1bab181 RS |
710 | |
711 | REQUEST is a list of features we must 'require for SYMBOL. | |
55535639 | 712 | COMMENT is a comment string about SYMBOL." |
e1bab181 RS |
713 | (apply 'custom-theme-set-variables 'user args)) |
714 | ||
715 | (defun custom-theme-set-variables (theme &rest args) | |
716 | "Initialize variables according to settings specified by args. | |
717 | Records the settings as belonging to THEME. | |
718 | ||
719 | The arguments should be a list where each entry has the form: | |
720 | ||
721 | (SYMBOL VALUE [NOW [REQUEST [COMMENT]]]) | |
722 | ||
723 | The unevaluated VALUE is stored as the saved value for SYMBOL. | |
724 | If NOW is present and non-nil, VALUE is also evaluated and bound as | |
725 | the default value for the SYMBOL. | |
726 | REQUEST is a list of features we must 'require for SYMBOL. | |
727 | COMMENT is a comment string about SYMBOL. | |
728 | ||
729 | Several properties of THEME and SYMBOL are used in the process: | |
730 | ||
731 | If THEME property `theme-immediate' is non-nil, this is equivalent of | |
732 | providing the NOW argument to all symbols in the argument list: SYMBOL | |
733 | is bound to the evaluated VALUE. The only difference is SYMBOL property | |
734 | `force-value': if NOW is non-nil, SYMBOL's property `force-value' is set to | |
735 | the symbol `rogue', else if THEME's property `theme-immediate' is non-nil, | |
736 | FACE's property `force-face' is set to the symbol `immediate'. | |
737 | ||
738 | VALUE itself is saved unevaluated as SYMBOL property `saved-value' and | |
739 | in SYMBOL's list property `theme-value' \(using `custom-push-theme')." | |
740 | (custom-check-theme theme) | |
741 | (let ((immediate (get theme 'theme-immediate))) | |
742 | (setq args | |
743 | (sort args | |
744 | (lambda (a1 a2) | |
745 | (let* ((sym1 (car a1)) | |
746 | (sym2 (car a2)) | |
747 | (1-then-2 (memq sym1 (get sym2 'custom-dependencies))) | |
748 | (2-then-1 (memq sym2 (get sym1 'custom-dependencies)))) | |
749 | (cond ((and 1-then-2 2-then-1) | |
750 | (error "Circular custom dependency between `%s' and `%s'" | |
751 | sym1 sym2)) | |
752 | (2-then-1 nil) | |
753 | ;; Put symbols with :require last. The macro | |
754 | ;; define-minor-mode generates a defcustom | |
755 | ;; with a :require and a :set, where the | |
756 | ;; setter function calls the mode function. | |
757 | ;; Putting symbols with :require last ensures | |
758 | ;; that the mode function will see other | |
759 | ;; customized values rather than default | |
760 | ;; values. | |
761 | (t (nth 3 a2))))))) | |
762 | (while args | |
763 | (let ((entry (car args))) | |
764 | (if (listp entry) | |
765 | (let* ((symbol (nth 0 entry)) | |
766 | (value (nth 1 entry)) | |
767 | (now (nth 2 entry)) | |
768 | (requests (nth 3 entry)) | |
769 | (comment (nth 4 entry)) | |
770 | set) | |
771 | (when requests | |
772 | (put symbol 'custom-requests requests) | |
773 | (mapc 'require requests)) | |
774 | (setq set (or (get symbol 'custom-set) 'custom-set-default)) | |
775 | (put symbol 'saved-value (list value)) | |
776 | (put symbol 'saved-variable-comment comment) | |
777 | (custom-push-theme 'theme-value symbol theme 'set value) | |
778 | ;; Allow for errors in the case where the setter has | |
55535639 PJ |
779 | ;; changed between versions, say, but let the user know. |
780 | (condition-case data | |
781 | (cond (now | |
782 | ;; Rogue variable, set it now. | |
783 | (put symbol 'force-value t) | |
784 | (funcall set symbol (eval value))) | |
785 | ((default-boundp symbol) | |
786 | ;; Something already set this, overwrite it. | |
787 | (funcall set symbol (eval value)))) | |
71296446 | 788 | (error |
55535639 | 789 | (message "Error setting %s: %s" symbol data))) |
e1bab181 RS |
790 | (setq args (cdr args)) |
791 | (and (or now (default-boundp symbol)) | |
792 | (put symbol 'variable-comment comment))) | |
793 | ;; Old format, a plist of SYMBOL VALUE pairs. | |
794 | (message "Warning: old format `custom-set-variables'") | |
795 | (ding) | |
796 | (sit-for 2) | |
797 | (let ((symbol (nth 0 args)) | |
798 | (value (nth 1 args))) | |
799 | (put symbol 'saved-value (list value)) | |
800 | (custom-push-theme 'theme-value symbol theme 'set value)) | |
801 | (setq args (cdr (cdr args)))))))) | |
55535639 PJ |
802 | |
803 | (defun custom-set-default (variable value) | |
804 | "Default :set function for a customizable variable. | |
805 | Normally, this sets the default value of VARIABLE to VALUE, | |
806 | but if `custom-local-buffer' is non-nil, | |
807 | this sets the local binding in that buffer instead." | |
808 | (if custom-local-buffer | |
809 | (with-current-buffer custom-local-buffer | |
810 | (set variable value)) | |
811 | (set-default variable value))) | |
812 | ||
df380962 SM |
813 | (defun custom-set-minor-mode (variable value) |
814 | ":set function for minor mode variables. | |
815 | Normally, this sets the default value of VARIABLE to nil if VALUE | |
816 | is nil and to t otherwise, | |
817 | but if `custom-local-buffer' is non-nil, | |
818 | this sets the local binding in that buffer instead." | |
819 | (if custom-local-buffer | |
820 | (with-current-buffer custom-local-buffer | |
821 | (funcall variable (or value 0))) | |
822 | (funcall variable (or value 0)))) | |
823 | ||
6d912ee1 MB |
824 | (defun custom-quote (sexp) |
825 | "Quote SEXP iff it is not self quoting." | |
826 | (if (or (memq sexp '(t nil)) | |
827 | (keywordp sexp) | |
828 | (and (listp sexp) | |
829 | (memq (car sexp) '(lambda))) | |
830 | (stringp sexp) | |
831 | (numberp sexp) | |
832 | (vectorp sexp) | |
833 | ;;; (and (fboundp 'characterp) | |
834 | ;;; (characterp sexp)) | |
835 | ) | |
836 | sexp | |
837 | (list 'quote sexp))) | |
838 | ||
839 | (defun customize-mark-to-save (symbol) | |
840 | "Mark SYMBOL for later saving. | |
841 | ||
71296446 | 842 | If the default value of SYMBOL is different from the standard value, |
6d912ee1 | 843 | set the `saved-value' property to a list whose car evaluates to the |
e2cd29bd | 844 | default value. Otherwise, set it to nil. |
6d912ee1 MB |
845 | |
846 | To actually save the value, call `custom-save-all'. | |
847 | ||
848 | Return non-nil iff the `saved-value' property actually changed." | |
849 | (let* ((get (or (get symbol 'custom-get) 'default-value)) | |
850 | (value (funcall get symbol)) | |
851 | (saved (get symbol 'saved-value)) | |
852 | (standard (get symbol 'standard-value)) | |
853 | (comment (get symbol 'customized-variable-comment))) | |
854 | ;; Save default value iff different from standard value. | |
855 | (if (or (null standard) | |
856 | (not (equal value (condition-case nil | |
857 | (eval (car standard)) | |
858 | (error nil))))) | |
859 | (put symbol 'saved-value (list (custom-quote value))) | |
860 | (put symbol 'saved-value nil)) | |
861 | ;; Clear customized information (set, but not saved). | |
862 | (put symbol 'customized-value nil) | |
863 | ;; Save any comment that might have been set. | |
864 | (when comment | |
865 | (put symbol 'saved-variable-comment comment)) | |
866 | (not (equal saved (get symbol 'saved-value))))) | |
867 | ||
868 | (defun customize-mark-as-set (symbol) | |
869 | "Mark current value of SYMBOL as being set from customize. | |
870 | ||
71296446 | 871 | If the default value of SYMBOL is different from the saved value if any, |
6d912ee1 | 872 | or else if it is different from the standard value, set the |
71296446 | 873 | `customized-value' property to a list whose car evaluates to the |
e2cd29bd | 874 | default value. Otherwise, set it to nil. |
6d912ee1 MB |
875 | |
876 | Return non-nil iff the `customized-value' property actually changed." | |
877 | (let* ((get (or (get symbol 'custom-get) 'default-value)) | |
878 | (value (funcall get symbol)) | |
879 | (customized (get symbol 'customized-value)) | |
880 | (old (or (get symbol 'saved-value) (get symbol 'standard-value)))) | |
881 | ;; Mark default value as set iff different from old value. | |
882 | (if (or (null old) | |
71296446 | 883 | (not (equal value (condition-case nil |
6d912ee1 MB |
884 | (eval (car old)) |
885 | (error nil))))) | |
886 | (put symbol 'customized-value (list (custom-quote value))) | |
887 | (put symbol 'customized-value nil)) | |
888 | ;; Changed? | |
889 | (not (equal customized (get symbol 'customized-value))))) | |
890 | ||
e1bab181 RS |
891 | ;;; Theme Manipulation |
892 | ||
893 | (defvar custom-loaded-themes nil | |
894 | "Themes in the order they are loaded.") | |
895 | ||
896 | (defun custom-theme-loaded-p (theme) | |
897 | "Return non-nil when THEME has been loaded." | |
898 | (memq theme custom-loaded-themes)) | |
899 | ||
900 | (defun provide-theme (theme) | |
901 | "Indicate that this file provides THEME. | |
902 | Add THEME to `custom-loaded-themes' and `provide' whatever | |
903 | is stored in THEME's property `theme-feature'. | |
904 | ||
905 | Usually the theme-feature property contains a symbol created | |
906 | by `custom-make-theme-feature'." | |
907 | (custom-check-theme theme) | |
908 | (provide (get theme 'theme-feature)) | |
909 | (setq custom-loaded-themes (nconc (list theme) custom-loaded-themes))) | |
910 | ||
911 | (defun require-theme (theme) | |
912 | "Try to load a theme by requiring its feature. | |
913 | THEME's feature is stored in THEME's `theme-feature' property. | |
914 | ||
915 | Usually the `theme-feature' property contains a symbol created | |
916 | by `custom-make-theme-feature'." | |
917 | ;; Note we do no check for validity of the theme here. | |
918 | ;; This allows to pull in themes by a file-name convention | |
919 | (require (or (get theme 'theme-feature) | |
920 | (custom-make-theme-feature theme)))) | |
921 | ||
922 | (defun custom-remove-theme (spec-alist theme) | |
e2cd29bd | 923 | "Delete all elements from SPEC-ALIST whose car is THEME." |
e1bab181 RS |
924 | (let ((elt (assoc theme spec-alist))) |
925 | (while elt | |
926 | (setq spec-alist (delete elt spec-alist) | |
927 | elt (assoc theme spec-alist)))) | |
928 | spec-alist) | |
929 | ||
930 | (defun custom-do-theme-reset (theme) | |
931 | "Undo all settings defined by THEME. | |
932 | ||
933 | A variable remains unchanged if its property `theme-value' does not | |
934 | contain a value for THEME. A face remains unchanged if its property | |
935 | `theme-face' does not contain a value for THEME. In either case, all | |
936 | settings for THEME are removed from the property and the variable or | |
937 | face is set to the `user' theme. | |
938 | ||
939 | See `custom-known-themes' for a list of known themes." | |
940 | (let (spec-list) | |
941 | (mapatoms (lambda (symbol) | |
942 | ;; This works even if symbol is both a variable and a | |
943 | ;; face. | |
944 | (setq spec-list (get symbol 'theme-value)) | |
945 | (when spec-list | |
946 | (put symbol 'theme-value (custom-remove-theme spec-list theme)) | |
947 | (custom-theme-reset-internal symbol 'user)) | |
948 | (setq spec-list (get symbol 'theme-face)) | |
949 | (when spec-list | |
950 | (put symbol 'theme-face (custom-remove-theme spec-list theme)) | |
951 | (custom-theme-reset-internal-face symbol 'user)))))) | |
952 | ||
953 | (defun custom-theme-load-themes (by-theme &rest body) | |
954 | "Load the themes specified by BODY. | |
955 | Record them as required by theme BY-THEME. BODY is a sequence of either | |
956 | ||
957 | THEME | |
958 | BY-THEME requires THEME | |
959 | \(reset THEME) | |
960 | Undo all the settings made by THEME | |
961 | \(hidden THEME) | |
962 | Require THEME but hide it from the user | |
963 | ||
964 | All the themes loaded for BY-THEME are recorded in BY-THEME's property | |
965 | `theme-loads-themes'. Any theme loaded with the hidden predicate will | |
966 | be given the property `theme-hidden' unless it has been loaded before. | |
967 | Whether a theme has been loaded before is determined by the function | |
968 | `custom-theme-loaded-p'." | |
969 | (custom-check-theme by-theme) | |
970 | (let ((theme) | |
971 | (themes-loaded (get by-theme 'theme-loads-themes))) | |
972 | (while theme | |
973 | (setq theme (car body) | |
974 | body (cdr body)) | |
975 | (cond ((and (consp theme) (eq (car theme) 'reset)) | |
976 | (custom-do-theme-reset (cadr theme))) | |
977 | ((and (consp theme) (eq (car theme) 'hidden)) | |
978 | (require-theme (cadr theme)) | |
979 | (unless (custom-theme-loaded-p (cadr theme)) | |
980 | (put (cadr theme) 'theme-hidden t))) | |
981 | (t | |
982 | (require-theme theme) | |
983 | (put theme 'theme-hidden nil))) | |
984 | (setq themes-loaded (nconc (list theme) themes-loaded))) | |
985 | (put by-theme 'theme-loads-themes themes-loaded))) | |
986 | ||
987 | (defun custom-load-themes (&rest body) | |
988 | "Load themes for the USER theme as specified by BODY. | |
989 | ||
990 | See `custom-theme-load-themes' for more information on BODY." | |
991 | (apply 'custom-theme-load-themes 'user body)) | |
992 | ||
993 | ; (defsubst copy-upto-last (elt list) | |
994 | ; "Copy all the elements of the list upto the last occurence of elt" | |
995 | ; ;; Is it faster to do more work in C than to do less in elisp? | |
996 | ; (nreverse (cdr (member elt (reverse list))))) | |
997 | ||
998 | (defun custom-theme-value (theme theme-spec-list) | |
999 | "Determine the value for THEME defined by THEME-SPEC-LIST. | |
1000 | Returns a list with the original value if found; nil otherwise. | |
1001 | ||
1002 | THEME-SPEC-LIST is an alist with themes as its key. As new themes are | |
1003 | installed, these are added to the front of THEME-SPEC-LIST. | |
1004 | Each element has the form | |
1005 | ||
1006 | \(THEME MODE VALUE) | |
1007 | ||
1008 | MODE is either the symbol `set' or the symbol `reset'. See | |
1009 | `custom-push-theme' for more information on the format of | |
1010 | THEME-SPEC-LIST." | |
1011 | ;; Note we do _NOT_ signal an error if the theme is unknown | |
1012 | ;; it might have gone away without the user knowing. | |
1013 | (let ((value (cdr (assoc theme theme-spec-list)))) | |
1014 | (if value | |
1015 | (if (eq (car value) 'set) | |
1016 | (cdr value) | |
1017 | (custom-theme-value (cadr value) theme-spec-list))))) | |
1018 | ||
1019 | (defun custom-theme-variable-value (variable theme) | |
1020 | "Return (list value) indicating value of VARIABLE in THEME. | |
1021 | If THEME does not define a value for VARIABLE, return nil. The value | |
1022 | definitions per theme are stored in VARIABLE's property `theme-value'. | |
1023 | The actual work is done by function `custom-theme-value', which see. | |
1024 | See `custom-push-theme' for more information on how these definitions | |
1025 | are stored." | |
1026 | (custom-theme-value theme (get variable 'theme-value))) | |
1027 | ||
1028 | (defun custom-theme-reset-internal (symbol to-theme) | |
1029 | "Reset SYMBOL to the value defined by TO-THEME. | |
1030 | If SYMBOL is not defined in TO-THEME, reset SYMBOL to the standard | |
1031 | value. See `custom-theme-variable-value'. The standard value is | |
1032 | stored in SYMBOL's property `standard-value'." | |
1033 | (let ((value (custom-theme-variable-value symbol to-theme)) | |
1034 | was-in-theme) | |
1035 | (setq was-in-theme value) | |
1036 | (setq value (or value (get symbol 'standard-value))) | |
1037 | (when value | |
1038 | (put symbol 'saved-value was-in-theme) | |
1039 | (if (or (get 'force-value symbol) (default-boundp symbol)) | |
1040 | (funcall (or (get symbol 'custom-set) 'set-default) symbol | |
1041 | (eval (car value))))) | |
1042 | value)) | |
1043 | ||
1044 | (defun custom-theme-reset-variables (theme &rest args) | |
1045 | "Reset the value of the variables to values previously defined. | |
1046 | Associate this setting with THEME. | |
1047 | ||
1048 | ARGS is a list of lists of the form | |
1049 | ||
1050 | (VARIABLE TO-THEME) | |
1051 | ||
1052 | This means reset VARIABLE to its value in TO-THEME." | |
1053 | (custom-check-theme theme) | |
1054 | (mapcar '(lambda (arg) | |
1055 | (apply 'custom-theme-reset-internal arg) | |
1056 | (custom-push-theme 'theme-value (car arg) theme 'reset (cadr arg))) | |
1057 | args)) | |
1058 | ||
1059 | (defun custom-reset-variables (&rest args) | |
1060 | "Reset the value of the variables to values previously saved. | |
1061 | This is the setting associated the `user' theme. | |
1062 | ||
1063 | ARGS is a list of lists of the form | |
1064 | ||
1065 | (VARIABLE TO-THEME) | |
1066 | ||
1067 | This means reset VARIABLE to its value in TO-THEME." | |
1068 | (apply 'custom-theme-reset-variables 'user args)) | |
1069 | ||
55535639 PJ |
1070 | ;;; The End. |
1071 | ||
1072 | ;; Process the defcustoms for variables loaded before this file. | |
1073 | (while custom-declare-variable-list | |
1074 | (apply 'custom-declare-variable (car custom-declare-variable-list)) | |
1075 | (setq custom-declare-variable-list (cdr custom-declare-variable-list))) | |
1076 | ||
1077 | (provide 'custom) | |
1078 | ||
ab5796a9 | 1079 | ;;; arch-tag: 041b6116-aabe-4f9a-902d-74092bc3dab2 |
55535639 | 1080 | ;;; custom.el ends here |