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55535639 PJ |
1 | ;;; custom.el --- tools for declaring and initializing options |
2 | ;; | |
00644b82 | 3 | ;; Copyright (C) 1996, 1997, 1999, 2001, 2002 Free Software Foundation, Inc. |
55535639 PJ |
4 | ;; |
5 | ;; Author: Per Abrahamsen <abraham@dina.kvl.dk> | |
6 | ;; Maintainer: FSF | |
7 | ;; Keywords: help, faces | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
13 | ;; the Free Software Foundation; either version 2, or (at your option) | |
14 | ;; any later version. | |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
25 | ||
26 | ;;; Commentary: | |
27 | ;; | |
e6bb31f3 | 28 | ;; This file only contains the code needed to declare and initialize |
55535639 PJ |
29 | ;; user options. The code to customize options is autoloaded from |
30 | ;; `cus-edit.el' and is documented in the Emacs Lisp Reference manual. | |
31 | ||
e6bb31f3 | 32 | ;; The code implementing face declarations is in `cus-face.el'. |
55535639 PJ |
33 | |
34 | ;;; Code: | |
35 | ||
36 | (require 'widget) | |
37 | ||
38 | (defvar custom-define-hook nil | |
39 | ;; Customize information for this option is in `cus-edit.el'. | |
40 | "Hook called after defining each customize option.") | |
41 | ||
6da43544 RS |
42 | (defvar custom-dont-initialize nil |
43 | "Non-nil means `defcustom' should not initialize the variable. | |
44 | That is used for the sake of `custom-make-dependencies'. | |
45 | Users should not set it.") | |
46 | ||
d3b80e9b SM |
47 | (defvar custom-current-group-alist nil |
48 | "Alist of (FILE . GROUP) indicating the current group to use for FILE.") | |
49 | ||
55535639 PJ |
50 | ;;; The `defcustom' Macro. |
51 | ||
52 | (defun custom-initialize-default (symbol value) | |
53 | "Initialize SYMBOL with VALUE. | |
54 | This will do nothing if symbol already has a default binding. | |
55 | Otherwise, if symbol has a `saved-value' property, it will evaluate | |
56 | the car of that and used as the default binding for symbol. | |
57 | Otherwise, VALUE will be evaluated and used as the default binding for | |
58 | symbol." | |
59 | (unless (default-boundp symbol) | |
60 | ;; Use the saved value if it exists, otherwise the standard setting. | |
61 | (set-default symbol (if (get symbol 'saved-value) | |
62 | (eval (car (get symbol 'saved-value))) | |
63 | (eval value))))) | |
64 | ||
65 | (defun custom-initialize-set (symbol value) | |
66 | "Initialize SYMBOL based on VALUE. | |
67 | If the symbol doesn't have a default binding already, | |
68 | then set it using its `:set' function (or `set-default' if it has none). | |
69 | The value is either the value in the symbol's `saved-value' property, | |
70 | if any, or VALUE." | |
71 | (unless (default-boundp symbol) | |
72 | (funcall (or (get symbol 'custom-set) 'set-default) | |
73 | symbol | |
74 | (if (get symbol 'saved-value) | |
75 | (eval (car (get symbol 'saved-value))) | |
76 | (eval value))))) | |
77 | ||
78 | (defun custom-initialize-reset (symbol value) | |
79 | "Initialize SYMBOL based on VALUE. | |
80 | Set the symbol, using its `:set' function (or `set-default' if it has none). | |
81 | The value is either the symbol's current value | |
82 | \(as obtained using the `:get' function), if any, | |
83 | or the value in the symbol's `saved-value' property if any, | |
84 | or (last of all) VALUE." | |
85 | (funcall (or (get symbol 'custom-set) 'set-default) | |
86 | symbol | |
87 | (cond ((default-boundp symbol) | |
88 | (funcall (or (get symbol 'custom-get) 'default-value) | |
89 | symbol)) | |
90 | ((get symbol 'saved-value) | |
91 | (eval (car (get symbol 'saved-value)))) | |
92 | (t | |
93 | (eval value))))) | |
94 | ||
95 | (defun custom-initialize-changed (symbol value) | |
96 | "Initialize SYMBOL with VALUE. | |
97 | Like `custom-initialize-reset', but only use the `:set' function if | |
98 | not using the standard setting. | |
99 | For the standard setting, use `set-default'." | |
100 | (cond ((default-boundp symbol) | |
101 | (funcall (or (get symbol 'custom-set) 'set-default) | |
102 | symbol | |
103 | (funcall (or (get symbol 'custom-get) 'default-value) | |
104 | symbol))) | |
105 | ((get symbol 'saved-value) | |
106 | (funcall (or (get symbol 'custom-set) 'set-default) | |
107 | symbol | |
108 | (eval (car (get symbol 'saved-value))))) | |
109 | (t | |
110 | (set-default symbol (eval value))))) | |
111 | ||
112 | (defun custom-declare-variable (symbol default doc &rest args) | |
113 | "Like `defcustom', but SYMBOL and DEFAULT are evaluated as normal arguments. | |
114 | DEFAULT should be an expression to evaluate to compute the default value, | |
e1bab181 RS |
115 | not the default value itself. |
116 | ||
117 | DEFAULT is stored as SYMBOL's value in the standard theme. See | |
118 | `custom-known-themes' for a list of known themes. For backwards | |
119 | compatibility, DEFAULT is also stored in SYMBOL's property | |
120 | `standard-value'. At the same time, SYMBOL's property `force-value' is | |
121 | set to nil, as the value is no longer rogue." | |
122 | ;; Remember the standard setting. The value should be in the standard | |
123 | ;; theme, not in this property. However, his would require changeing | |
124 | ;; the C source of defvar and others as well... | |
55535639 PJ |
125 | (put symbol 'standard-value (list default)) |
126 | ;; Maybe this option was rogue in an earlier version. It no longer is. | |
127 | (when (get symbol 'force-value) | |
128 | (put symbol 'force-value nil)) | |
129 | (when doc | |
130 | (put symbol 'variable-documentation doc)) | |
131 | (let ((initialize 'custom-initialize-reset) | |
132 | (requests nil)) | |
d3b80e9b SM |
133 | (unless (memq :group args) |
134 | (custom-add-to-group (custom-current-group) symbol 'custom-variable)) | |
55535639 PJ |
135 | (while args |
136 | (let ((arg (car args))) | |
137 | (setq args (cdr args)) | |
138 | (unless (symbolp arg) | |
139 | (error "Junk in args %S" args)) | |
140 | (let ((keyword arg) | |
141 | (value (car args))) | |
142 | (unless args | |
143 | (error "Keyword %s is missing an argument" keyword)) | |
144 | (setq args (cdr args)) | |
145 | (cond ((eq keyword :initialize) | |
146 | (setq initialize value)) | |
147 | ((eq keyword :set) | |
148 | (put symbol 'custom-set value)) | |
149 | ((eq keyword :get) | |
150 | (put symbol 'custom-get value)) | |
151 | ((eq keyword :require) | |
6f0d61bf | 152 | (push value requests)) |
55535639 PJ |
153 | ((eq keyword :type) |
154 | (put symbol 'custom-type (purecopy value))) | |
155 | ((eq keyword :options) | |
156 | (if (get symbol 'custom-options) | |
157 | ;; Slow safe code to avoid duplicates. | |
158 | (mapc (lambda (option) | |
159 | (custom-add-option symbol option)) | |
6f0d61bf | 160 | value) |
55535639 PJ |
161 | ;; Fast code for the common case. |
162 | (put symbol 'custom-options (copy-sequence value)))) | |
163 | (t | |
164 | (custom-handle-keyword symbol keyword value | |
165 | 'custom-variable)))))) | |
166 | (put symbol 'custom-requests requests) | |
167 | ;; Do the actual initialization. | |
6da43544 RS |
168 | (unless custom-dont-initialize |
169 | (funcall initialize symbol default))) | |
6f0d61bf | 170 | (push (cons 'defvar symbol) current-load-list) |
55535639 PJ |
171 | (run-hooks 'custom-define-hook) |
172 | symbol) | |
173 | ||
174 | (defmacro defcustom (symbol value doc &rest args) | |
175 | "Declare SYMBOL as a customizable variable that defaults to VALUE. | |
176 | DOC is the variable documentation. | |
177 | ||
178 | Neither SYMBOL nor VALUE needs to be quoted. | |
179 | If SYMBOL is not already bound, initialize it to VALUE. | |
180 | The remaining arguments should have the form | |
181 | ||
182 | [KEYWORD VALUE]... | |
183 | ||
184 | The following keywords are meaningful: | |
185 | ||
693d0bd3 | 186 | :type VALUE should be a widget type for editing the symbol's value. |
55535639 PJ |
187 | :options VALUE should be a list of valid members of the widget type. |
188 | :group VALUE should be a customization group. | |
189 | Add SYMBOL to that group. | |
3dc5f18e | 190 | :link LINK-DATA |
00644b82 EZ |
191 | Include an external link after the documentation string for this |
192 | item. This is a sentence containing an active field which | |
193 | references some other documentation. | |
71296446 | 194 | |
00644b82 | 195 | There are three alternatives you can use for LINK-DATA: |
71296446 | 196 | |
3dc5f18e | 197 | (custom-manual INFO-NODE) |
00644b82 | 198 | Link to an Info node; INFO-NODE is a string which specifies |
3dc5f18e | 199 | the node name, as in \"(emacs)Top\". The link appears as |
00644b82 | 200 | `[manual]' in the customization buffer. |
71296446 | 201 | |
3dc5f18e | 202 | (info-link INFO-NODE) |
00644b82 EZ |
203 | Like `custom-manual' except that the link appears in the |
204 | customization buffer with the Info node name. | |
71296446 | 205 | |
3dc5f18e | 206 | (url-link URL) |
00644b82 EZ |
207 | Link to a web page; URL is a string which specifies the URL. |
208 | The link appears in the customization buffer as URL. | |
71296446 | 209 | |
00644b82 EZ |
210 | You can specify the text to use in the customization buffer by |
211 | adding `:tag NAME' after the first element of the LINK-DATA; for | |
3dc5f18e | 212 | example, (info-link :tag \"foo\" \"(emacs)Top\") makes a link to the |
00644b82 | 213 | Emacs manual which appears in the buffer as `foo'. |
71296446 | 214 | |
00644b82 EZ |
215 | An item can have more than one external link; however, most items |
216 | have none at all. | |
55535639 PJ |
217 | :initialize |
218 | VALUE should be a function used to initialize the | |
219 | variable. It takes two arguments, the symbol and value | |
220 | given in the `defcustom' call. The default is | |
a01639a3 | 221 | `custom-initialize-reset'. |
55535639 PJ |
222 | :set VALUE should be a function to set the value of the symbol. |
223 | It takes two arguments, the symbol to set and the value to | |
224 | give it. The default choice of function is `custom-set-default'. | |
225 | :get VALUE should be a function to extract the value of symbol. | |
226 | The function takes one argument, a symbol, and should return | |
227 | the current value for that symbol. The default choice of function | |
228 | is `custom-default-value'. | |
229 | :require | |
230 | VALUE should be a feature symbol. If you save a value | |
231 | for this option, then when your `.emacs' file loads the value, | |
232 | it does (require VALUE) first. | |
233 | :version | |
234 | VALUE should be a string specifying that the variable was | |
235 | first introduced, or its default value was changed, in Emacs | |
236 | version VERSION. | |
00644b82 EZ |
237 | :tag LABEL |
238 | Use LABEL, a string, instead of the item's name, to label the item | |
1c1da418 | 239 | in customization menus and buffers. |
00644b82 EZ |
240 | :load FILE |
241 | Load file FILE (a string) before displaying this customization | |
29512a0f | 242 | item. Loading is done with `load', and only if the file is |
00644b82 | 243 | not already loaded. |
64e9f9d9 DL |
244 | :set-after VARIABLES |
245 | Specifies that SYMBOL should be set after the list of variables | |
246 | VARIABLES when both have been customized. | |
55535639 PJ |
247 | |
248 | Read the section about customization in the Emacs Lisp manual for more | |
249 | information." | |
250 | ;; It is better not to use backquote in this file, | |
251 | ;; because that makes a bootstrapping problem | |
252 | ;; if you need to recompile all the Lisp files using interpreted code. | |
253 | (nconc (list 'custom-declare-variable | |
254 | (list 'quote symbol) | |
255 | (list 'quote value) | |
256 | doc) | |
257 | args)) | |
258 | ||
259 | ;;; The `defface' Macro. | |
260 | ||
261 | (defmacro defface (face spec doc &rest args) | |
262 | "Declare FACE as a customizable face that defaults to SPEC. | |
263 | FACE does not need to be quoted. | |
264 | ||
265 | Third argument DOC is the face documentation. | |
266 | ||
2a69edce | 267 | If FACE has been set with `custom-set-faces', set the face attributes |
55535639 PJ |
268 | as specified by that function, otherwise set the face attributes |
269 | according to SPEC. | |
270 | ||
271 | The remaining arguments should have the form | |
272 | ||
273 | [KEYWORD VALUE]... | |
274 | ||
275 | The following KEYWORDs are defined: | |
276 | ||
277 | :group VALUE should be a customization group. | |
278 | Add FACE to that group. | |
279 | ||
280 | SPEC should be an alist of the form ((DISPLAY ATTS)...). | |
281 | ||
282 | The first element of SPEC where the DISPLAY matches the frame | |
283 | is the one that takes effect in that frame. The ATTRs in this | |
284 | element take effect; the other elements are ignored, on that frame. | |
285 | ||
286 | ATTS is a list of face attributes followed by their values: | |
287 | (ATTR VALUE ATTR VALUE...) | |
288 | ||
289 | The possible attributes are `:family', `:width', `:height', `:weight', | |
290 | `:slant', `:underline', `:overline', `:strike-through', `:box', | |
3d58b15e | 291 | `:foreground', `:background', `:stipple', `:inverse-video', and `:inherit'. |
55535639 PJ |
292 | |
293 | DISPLAY can either be the symbol t, which will match all frames, or an | |
294 | alist of the form \((REQ ITEM...)...). For the DISPLAY to match a | |
295 | FRAME, the REQ property of the frame must match one of the ITEM. The | |
296 | following REQ are defined: | |
297 | ||
298 | `type' (the value of `window-system') | |
299 | Under X, in addition to the values `window-system' can take, | |
300 | `motif', `lucid' and `x-toolkit' are allowed, and match when | |
301 | the Motif toolkit, Lucid toolkit, or any X toolkit is in use. | |
302 | ||
303 | `class' (the frame's color support) | |
304 | Should be one of `color', `grayscale', or `mono'. | |
305 | ||
306 | `background' (what color is used for the background text) | |
307 | Should be one of `light' or `dark'. | |
308 | ||
6e166990 EZ |
309 | `min-colors' (the minimum number of colors the frame should support) |
310 | Should be an integer, it is compared with the result of | |
311 | `display-color-cells'. | |
312 | ||
55535639 PJ |
313 | Read the section about customization in the Emacs Lisp manual for more |
314 | information." | |
315 | ;; It is better not to use backquote in this file, | |
316 | ;; because that makes a bootstrapping problem | |
317 | ;; if you need to recompile all the Lisp files using interpreted code. | |
318 | (nconc (list 'custom-declare-face (list 'quote face) spec doc) args)) | |
319 | ||
320 | ;;; The `defgroup' Macro. | |
321 | ||
d3b80e9b SM |
322 | (defun custom-current-group () |
323 | (cdr (assoc load-file-name custom-current-group-alist))) | |
324 | ||
55535639 PJ |
325 | (defun custom-declare-group (symbol members doc &rest args) |
326 | "Like `defgroup', but SYMBOL is evaluated as a normal argument." | |
327 | (while members | |
328 | (apply 'custom-add-to-group symbol (car members)) | |
329 | (setq members (cdr members))) | |
55535639 PJ |
330 | (when doc |
331 | ;; This text doesn't get into DOC. | |
332 | (put symbol 'group-documentation (purecopy doc))) | |
333 | (while args | |
334 | (let ((arg (car args))) | |
335 | (setq args (cdr args)) | |
336 | (unless (symbolp arg) | |
337 | (error "Junk in args %S" args)) | |
338 | (let ((keyword arg) | |
339 | (value (car args))) | |
340 | (unless args | |
341 | (error "Keyword %s is missing an argument" keyword)) | |
342 | (setq args (cdr args)) | |
343 | (cond ((eq keyword :prefix) | |
344 | (put symbol 'custom-prefix value)) | |
345 | (t | |
346 | (custom-handle-keyword symbol keyword value | |
347 | 'custom-group)))))) | |
d3b80e9b SM |
348 | ;; Record the group on the `current' list. |
349 | (let ((elt (assoc load-file-name custom-current-group-alist))) | |
350 | (if elt (setcdr elt symbol) | |
351 | (push (cons load-file-name symbol) custom-current-group-alist))) | |
55535639 PJ |
352 | (run-hooks 'custom-define-hook) |
353 | symbol) | |
354 | ||
355 | (defmacro defgroup (symbol members doc &rest args) | |
356 | "Declare SYMBOL as a customization group containing MEMBERS. | |
357 | SYMBOL does not need to be quoted. | |
358 | ||
359 | Third arg DOC is the group documentation. | |
360 | ||
361 | MEMBERS should be an alist of the form ((NAME WIDGET)...) where | |
362 | NAME is a symbol and WIDGET is a widget for editing that symbol. | |
363 | Useful widgets are `custom-variable' for editing variables, | |
364 | `custom-face' for edit faces, and `custom-group' for editing groups. | |
365 | ||
366 | The remaining arguments should have the form | |
367 | ||
368 | [KEYWORD VALUE]... | |
369 | ||
370 | The following KEYWORDs are defined: | |
371 | ||
372 | :group VALUE should be a customization group. | |
373 | Add SYMBOL to that group. | |
374 | ||
375 | :version VALUE should be a string specifying that the group was introduced | |
376 | in Emacs version VERSION. | |
377 | ||
378 | Read the section about customization in the Emacs Lisp manual for more | |
379 | information." | |
380 | ;; It is better not to use backquote in this file, | |
381 | ;; because that makes a bootstrapping problem | |
382 | ;; if you need to recompile all the Lisp files using interpreted code. | |
383 | (nconc (list 'custom-declare-group (list 'quote symbol) members doc) args)) | |
384 | ||
385 | (defun custom-add-to-group (group option widget) | |
386 | "To existing GROUP add a new OPTION of type WIDGET. | |
387 | If there already is an entry for OPTION and WIDGET, nothing is done." | |
388 | (let ((members (get group 'custom-group)) | |
389 | (entry (list option widget))) | |
390 | (unless (member entry members) | |
391 | (put group 'custom-group (nconc members (list entry)))))) | |
392 | ||
29512a0f SM |
393 | (defun custom-group-of-mode (mode) |
394 | "Return the custom group corresponding to the major or minor MODE. | |
395 | If no such group is found, return nil." | |
396 | (or (get mode 'custom-mode-group) | |
397 | (if (or (get mode 'custom-group) | |
398 | (and (string-match "-mode\\'" (symbol-name mode)) | |
399 | (get (setq mode (intern (substring (symbol-name mode) | |
400 | 0 (match-beginning 0)))) | |
401 | 'custom-group))) | |
402 | mode))) | |
403 | ||
55535639 PJ |
404 | ;;; Properties. |
405 | ||
406 | (defun custom-handle-all-keywords (symbol args type) | |
407 | "For customization option SYMBOL, handle keyword arguments ARGS. | |
408 | Third argument TYPE is the custom option type." | |
d3b80e9b | 409 | (unless (memq :group args) |
9b6098b9 | 410 | (custom-add-to-group (custom-current-group) symbol type)) |
55535639 PJ |
411 | (while args |
412 | (let ((arg (car args))) | |
413 | (setq args (cdr args)) | |
414 | (unless (symbolp arg) | |
415 | (error "Junk in args %S" args)) | |
416 | (let ((keyword arg) | |
417 | (value (car args))) | |
418 | (unless args | |
419 | (error "Keyword %s is missing an argument" keyword)) | |
420 | (setq args (cdr args)) | |
421 | (custom-handle-keyword symbol keyword value type))))) | |
422 | ||
423 | (defun custom-handle-keyword (symbol keyword value type) | |
424 | "For customization option SYMBOL, handle KEYWORD with VALUE. | |
425 | Fourth argument TYPE is the custom option type." | |
426 | (if purify-flag | |
427 | (setq value (purecopy value))) | |
428 | (cond ((eq keyword :group) | |
429 | (custom-add-to-group value symbol type)) | |
430 | ((eq keyword :version) | |
431 | (custom-add-version symbol value)) | |
432 | ((eq keyword :link) | |
433 | (custom-add-link symbol value)) | |
434 | ((eq keyword :load) | |
435 | (custom-add-load symbol value)) | |
436 | ((eq keyword :tag) | |
437 | (put symbol 'custom-tag value)) | |
438 | ((eq keyword :set-after) | |
439 | (custom-add-dependencies symbol value)) | |
440 | (t | |
441 | (error "Unknown keyword %s" keyword)))) | |
442 | ||
443 | (defun custom-add-dependencies (symbol value) | |
444 | "To the custom option SYMBOL, add dependencies specified by VALUE. | |
445 | VALUE should be a list of symbols. For each symbol in that list, | |
446 | this specifies that SYMBOL should be set after the specified symbol, if | |
447 | both appear in constructs like `custom-set-variables'." | |
448 | (unless (listp value) | |
449 | (error "Invalid custom dependency `%s'" value)) | |
450 | (let* ((deps (get symbol 'custom-dependencies)) | |
451 | (new-deps deps)) | |
452 | (while value | |
453 | (let ((dep (car value))) | |
454 | (unless (symbolp dep) | |
455 | (error "Invalid custom dependency `%s'" dep)) | |
456 | (unless (memq dep new-deps) | |
457 | (setq new-deps (cons dep new-deps))) | |
458 | (setq value (cdr value)))) | |
459 | (unless (eq deps new-deps) | |
460 | (put symbol 'custom-dependencies new-deps)))) | |
e1bab181 | 461 | |
55535639 PJ |
462 | (defun custom-add-option (symbol option) |
463 | "To the variable SYMBOL add OPTION. | |
464 | ||
465 | If SYMBOL is a hook variable, OPTION should be a hook member. | |
466 | For other types variables, the effect is undefined." | |
467 | (let ((options (get symbol 'custom-options))) | |
468 | (unless (member option options) | |
469 | (put symbol 'custom-options (cons option options))))) | |
470 | ||
471 | (defun custom-add-link (symbol widget) | |
472 | "To the custom option SYMBOL add the link WIDGET." | |
473 | (let ((links (get symbol 'custom-links))) | |
474 | (unless (member widget links) | |
475 | (put symbol 'custom-links (cons (purecopy widget) links))))) | |
476 | ||
477 | (defun custom-add-version (symbol version) | |
478 | "To the custom option SYMBOL add the version VERSION." | |
479 | (put symbol 'custom-version (purecopy version))) | |
480 | ||
481 | (defun custom-add-load (symbol load) | |
482 | "To the custom option SYMBOL add the dependency LOAD. | |
483 | LOAD should be either a library file name, or a feature name." | |
484 | (let ((loads (get symbol 'custom-loads))) | |
485 | (unless (member load loads) | |
486 | (put symbol 'custom-loads (cons (purecopy load) loads))))) | |
487 | ||
1669290d MR |
488 | (defun custom-autoload (symbol load) |
489 | "Mark SYMBOL as autoloaded custom variable and add dependency LOAD." | |
490 | (put symbol 'custom-autoload t) | |
491 | (custom-add-load symbol load)) | |
492 | ||
493 | ;; This test is also in the C code of `user-variable-p'. | |
494 | (defun custom-variable-p (variable) | |
495 | "Return non-nil if VARIABLE is a custom variable." | |
496 | (or (get variable 'standard-value) | |
497 | (get variable 'custom-autoload))) | |
498 | ||
8f772dfd RS |
499 | ;;; Loading files needed to customize a symbol. |
500 | ;;; This is in custom.el because menu-bar.el needs it for toggle cmds. | |
501 | ||
502 | (defvar custom-load-recursion nil | |
503 | "Hack to avoid recursive dependencies.") | |
504 | ||
505 | (defun custom-load-symbol (symbol) | |
506 | "Load all dependencies for SYMBOL." | |
507 | (unless custom-load-recursion | |
29512a0f | 508 | (let ((custom-load-recursion t)) |
a8c78057 RS |
509 | ;; Load these files if not already done, |
510 | ;; to make sure we know all the dependencies of SYMBOL. | |
511 | (condition-case nil | |
512 | (require 'cus-load) | |
513 | (error nil)) | |
514 | (condition-case nil | |
515 | (require 'cus-start) | |
516 | (error nil)) | |
29512a0f SM |
517 | (dolist (load (get symbol 'custom-loads)) |
518 | (cond ((symbolp load) (condition-case nil (require load) (error nil))) | |
519 | ;; This is subsumed by the test below, but it's much faster. | |
8f772dfd RS |
520 | ((assoc load load-history)) |
521 | ;; This was just (assoc (locate-library load) load-history) | |
522 | ;; but has been optimized not to load locate-library | |
523 | ;; if not necessary. | |
29512a0f SM |
524 | ((let ((regexp (concat "\\(\\`\\|/\\)" (regexp-quote load) |
525 | "\\(\\'\\|\\.\\)")) | |
526 | (found nil)) | |
8f772dfd | 527 | (dolist (loaded load-history) |
c3891447 RS |
528 | (and (stringp (car loaded)) |
529 | (string-match regexp (car loaded)) | |
8f772dfd RS |
530 | (setq found t))) |
531 | found)) | |
532 | ;; Without this, we would load cus-edit recursively. | |
533 | ;; We are still loading it when we call this, | |
534 | ;; and it is not in load-history yet. | |
535 | ((equal load "cus-edit")) | |
29512a0f | 536 | (t (condition-case nil (load load) (error nil)))))))) |
8f772dfd | 537 | |
e1bab181 RS |
538 | (defvar custom-known-themes '(user standard) |
539 | "Themes that have been define with `deftheme'. | |
540 | The default value is the list (user standard). The theme `standard' | |
541 | contains the Emacs standard settings from the original Lisp files. The | |
542 | theme `user' contains all the the settings the user customized and saved. | |
543 | Additional themes declared with the `deftheme' macro will be added to | |
544 | the front of this list.") | |
545 | ||
546 | (defun custom-declare-theme (theme feature &optional doc &rest args) | |
547 | "Like `deftheme', but THEME is evaluated as a normal argument. | |
548 | FEATURE is the feature this theme provides. This symbol is created | |
549 | from THEME by `custom-make-theme-feature'." | |
550 | (add-to-list 'custom-known-themes theme) | |
551 | (put theme 'theme-feature feature) | |
552 | (when doc | |
553 | (put theme 'theme-documentation doc)) | |
554 | (while args | |
555 | (let ((arg (car args))) | |
556 | (setq args (cdr args)) | |
557 | (unless (symbolp arg) | |
558 | (error "Junk in args %S" args)) | |
559 | (let ((keyword arg) | |
560 | (value (car args))) | |
561 | (unless args | |
562 | (error "Keyword %s is missing an argument" keyword)) | |
563 | (setq args (cdr args)) | |
564 | (cond ((eq keyword :short-description) | |
7f9b6322 | 565 | (put theme 'theme-short-description value)) |
e1bab181 | 566 | ((eq keyword :immediate) |
7f9b6322 | 567 | (put theme 'theme-immediate value)) |
e1bab181 | 568 | ((eq keyword :variable-set-string) |
7f9b6322 | 569 | (put theme 'theme-variable-set-string value)) |
e1bab181 | 570 | ((eq keyword :variable-reset-string) |
7f9b6322 | 571 | (put theme 'theme-variable-reset-string value)) |
e1bab181 | 572 | ((eq keyword :face-set-string) |
7f9b6322 | 573 | (put theme 'theme-face-set-string value)) |
e1bab181 | 574 | ((eq keyword :face-reset-string) |
7f9b6322 | 575 | (put theme 'theme-face-reset-string value))))))) |
e1bab181 RS |
576 | |
577 | (defmacro deftheme (theme &optional doc &rest args) | |
578 | "Declare custom theme THEME. | |
579 | The optional argument DOC is a doc string describing the theme. | |
580 | The remaining arguments should have the form | |
581 | ||
582 | [KEYWORD VALUE]... | |
583 | ||
584 | The following KEYWORD's are defined: | |
585 | ||
586 | :short-description | |
587 | VALUE is a short (one line) description of the theme. If not | |
588 | given, DOC is used. | |
589 | :immediate | |
590 | If VALUE is non-nil, variables specified in this theme are set | |
591 | immediately when loading the theme. | |
592 | :variable-set-string | |
593 | VALUE is a string used to indicate that a variable takes its | |
594 | setting from this theme. It is passed to FORMAT with the name | |
595 | of the theme as an additional argument. If not given, a | |
596 | generic description is used. | |
597 | :variable-reset-string | |
598 | VALUE is a string used in the case a variable has been forced | |
599 | to its value in this theme. It is passed to FORMAT with the | |
600 | name of the theme as an additional argument. If not given, a | |
601 | generic description is used. | |
602 | :face-set-string | |
603 | VALUE is a string used to indicate that a face takes its | |
604 | setting from this theme. It is passed to FORMAT with the name | |
605 | of the theme as an additional argument. If not given, a | |
606 | generic description is used. | |
607 | :face-reset-string | |
608 | VALUE is a string used in the case a face has been forced to | |
609 | its value in this theme. It is passed to FORMAT with the name | |
610 | of the theme as an additional argument. If not given, a | |
611 | generic description is used. | |
612 | ||
613 | Any theme `foo' should be defined in a file called `foo-theme.el'; | |
614 | see `custom-make-theme-feature' for more information." | |
615 | (let ((feature (custom-make-theme-feature theme))) | |
616 | ;; It is better not to use backquote in this file, | |
617 | ;; because that makes a bootstrapping problem | |
618 | ;; if you need to recompile all the Lisp files using interpreted code. | |
619 | (nconc (list 'custom-declare-theme | |
620 | (list 'quote theme) | |
621 | (list 'quote feature) | |
622 | doc) args))) | |
623 | ||
624 | (defun custom-make-theme-feature (theme) | |
625 | "Given a symbol THEME, create a new symbol by appending \"-theme\". | |
626 | Store this symbol in the `theme-feature' property of THEME. | |
627 | Calling `provide-theme' to provide THEME actually puts `THEME-theme' | |
628 | into `features'. | |
629 | ||
630 | This allows for a file-name convention for autoloading themes: | |
631 | Every theme X has a property `provide-theme' whose value is \"X-theme\". | |
632 | \(require-theme X) then attempts to load the file `X-theme.el'." | |
633 | (intern (concat (symbol-name theme) "-theme"))) | |
634 | ||
635 | (defsubst custom-theme-p (theme) | |
636 | "Non-nil when THEME has been defined." | |
637 | (memq theme custom-known-themes)) | |
638 | ||
639 | (defsubst custom-check-theme (theme) | |
640 | "Check whether THEME is valid, and signal an error if it is not." | |
641 | (unless (custom-theme-p theme) | |
642 | (error "Unknown theme `%s'" theme))) | |
643 | ||
55535639 PJ |
644 | ;;; Initializing. |
645 | ||
e1bab181 RS |
646 | (defun custom-push-theme (prop symbol theme mode value) |
647 | "Add (THEME MODE VALUE) to the list in property PROP of SYMBOL. | |
648 | If the first element in that list is already (THEME ...), | |
649 | discard it first. | |
650 | ||
651 | MODE can be either the symbol `set' or the symbol `reset'. If it is the | |
652 | symbol `set', then VALUE is the value to use. If it is the symbol | |
653 | `reset', then VALUE is the mode to query instead. | |
654 | ||
655 | In the following example for the variable `goto-address-url-face', the | |
656 | theme `subtle-hacker' uses the same value for the variable as the theme | |
657 | `gnome2': | |
658 | ||
659 | \((standard set bold) | |
660 | \(gnome2 set info-xref) | |
661 | \(jonadab set underline) | |
662 | \(subtle-hacker reset gnome2)) | |
663 | ||
664 | ||
665 | If a value has been stored for themes A B and C, and a new value | |
666 | is to be stored for theme C, then the old value of C is discarded. | |
667 | If a new value is to be stored for theme B, however, the old value | |
668 | of B is not discarded because B is not the car of the list. | |
669 | ||
670 | For variables, list property PROP is `theme-value'. | |
671 | For faces, list property PROP is `theme-face'. | |
672 | This is used in `custom-do-theme-reset', for example. | |
673 | ||
674 | The list looks the same in any case; the examples shows a possible | |
675 | value of the `theme-face' property for the face `region': | |
676 | ||
677 | \((gnome2 set ((t (:foreground \"cyan\" :background \"dark cyan\")))) | |
678 | \(standard set ((((class color) (background dark)) | |
679 | \(:background \"blue\")) | |
680 | \(t (:background \"gray\"))))) | |
681 | ||
682 | This records values for the `standard' and the `gnome2' themes. | |
683 | The user has not customized the face; had he done that, | |
684 | the list would contain an entry for the `user' theme, too. | |
685 | See `custom-known-themes' for a list of known themes." | |
686 | (let ((old (get symbol prop))) | |
687 | (if (eq (car-safe (car-safe old)) theme) | |
688 | (setq old (cdr old))) | |
689 | (put symbol prop (cons (list theme mode value) old)))) | |
690 | ||
55535639 PJ |
691 | (defvar custom-local-buffer nil |
692 | "Non-nil, in a Customization buffer, means customize a specific buffer. | |
693 | If this variable is non-nil, it should be a buffer, | |
694 | and it means customize the local bindings of that buffer. | |
695 | This variable is a permanent local, and it normally has a local binding | |
696 | in every Customization buffer.") | |
697 | (put 'custom-local-buffer 'permanent-local t) | |
698 | ||
699 | (defun custom-set-variables (&rest args) | |
700 | "Initialize variables according to user preferences. | |
e1bab181 | 701 | The settings are registered as theme `user'. |
64e9f9d9 | 702 | The arguments should each be a list of the form: |
55535639 PJ |
703 | |
704 | (SYMBOL VALUE [NOW [REQUEST [COMMENT]]]) | |
705 | ||
706 | The unevaluated VALUE is stored as the saved value for SYMBOL. | |
707 | If NOW is present and non-nil, VALUE is also evaluated and bound as | |
708 | the default value for the SYMBOL. | |
e1bab181 RS |
709 | |
710 | REQUEST is a list of features we must 'require for SYMBOL. | |
55535639 | 711 | COMMENT is a comment string about SYMBOL." |
e1bab181 RS |
712 | (apply 'custom-theme-set-variables 'user args)) |
713 | ||
714 | (defun custom-theme-set-variables (theme &rest args) | |
715 | "Initialize variables according to settings specified by args. | |
716 | Records the settings as belonging to THEME. | |
717 | ||
718 | The arguments should be a list where each entry has the form: | |
719 | ||
720 | (SYMBOL VALUE [NOW [REQUEST [COMMENT]]]) | |
721 | ||
722 | The unevaluated VALUE is stored as the saved value for SYMBOL. | |
723 | If NOW is present and non-nil, VALUE is also evaluated and bound as | |
724 | the default value for the SYMBOL. | |
725 | REQUEST is a list of features we must 'require for SYMBOL. | |
726 | COMMENT is a comment string about SYMBOL. | |
727 | ||
728 | Several properties of THEME and SYMBOL are used in the process: | |
729 | ||
730 | If THEME property `theme-immediate' is non-nil, this is equivalent of | |
731 | providing the NOW argument to all symbols in the argument list: SYMBOL | |
732 | is bound to the evaluated VALUE. The only difference is SYMBOL property | |
733 | `force-value': if NOW is non-nil, SYMBOL's property `force-value' is set to | |
734 | the symbol `rogue', else if THEME's property `theme-immediate' is non-nil, | |
735 | FACE's property `force-face' is set to the symbol `immediate'. | |
736 | ||
737 | VALUE itself is saved unevaluated as SYMBOL property `saved-value' and | |
738 | in SYMBOL's list property `theme-value' \(using `custom-push-theme')." | |
739 | (custom-check-theme theme) | |
740 | (let ((immediate (get theme 'theme-immediate))) | |
741 | (setq args | |
742 | (sort args | |
743 | (lambda (a1 a2) | |
744 | (let* ((sym1 (car a1)) | |
745 | (sym2 (car a2)) | |
746 | (1-then-2 (memq sym1 (get sym2 'custom-dependencies))) | |
747 | (2-then-1 (memq sym2 (get sym1 'custom-dependencies)))) | |
748 | (cond ((and 1-then-2 2-then-1) | |
749 | (error "Circular custom dependency between `%s' and `%s'" | |
750 | sym1 sym2)) | |
751 | (2-then-1 nil) | |
752 | ;; Put symbols with :require last. The macro | |
753 | ;; define-minor-mode generates a defcustom | |
754 | ;; with a :require and a :set, where the | |
755 | ;; setter function calls the mode function. | |
756 | ;; Putting symbols with :require last ensures | |
757 | ;; that the mode function will see other | |
758 | ;; customized values rather than default | |
759 | ;; values. | |
760 | (t (nth 3 a2))))))) | |
761 | (while args | |
762 | (let ((entry (car args))) | |
763 | (if (listp entry) | |
764 | (let* ((symbol (nth 0 entry)) | |
765 | (value (nth 1 entry)) | |
766 | (now (nth 2 entry)) | |
767 | (requests (nth 3 entry)) | |
768 | (comment (nth 4 entry)) | |
769 | set) | |
770 | (when requests | |
771 | (put symbol 'custom-requests requests) | |
772 | (mapc 'require requests)) | |
773 | (setq set (or (get symbol 'custom-set) 'custom-set-default)) | |
774 | (put symbol 'saved-value (list value)) | |
775 | (put symbol 'saved-variable-comment comment) | |
776 | (custom-push-theme 'theme-value symbol theme 'set value) | |
777 | ;; Allow for errors in the case where the setter has | |
55535639 PJ |
778 | ;; changed between versions, say, but let the user know. |
779 | (condition-case data | |
780 | (cond (now | |
781 | ;; Rogue variable, set it now. | |
782 | (put symbol 'force-value t) | |
783 | (funcall set symbol (eval value))) | |
784 | ((default-boundp symbol) | |
785 | ;; Something already set this, overwrite it. | |
786 | (funcall set symbol (eval value)))) | |
71296446 | 787 | (error |
55535639 | 788 | (message "Error setting %s: %s" symbol data))) |
e1bab181 RS |
789 | (setq args (cdr args)) |
790 | (and (or now (default-boundp symbol)) | |
791 | (put symbol 'variable-comment comment))) | |
792 | ;; Old format, a plist of SYMBOL VALUE pairs. | |
793 | (message "Warning: old format `custom-set-variables'") | |
794 | (ding) | |
795 | (sit-for 2) | |
796 | (let ((symbol (nth 0 args)) | |
797 | (value (nth 1 args))) | |
798 | (put symbol 'saved-value (list value)) | |
799 | (custom-push-theme 'theme-value symbol theme 'set value)) | |
800 | (setq args (cdr (cdr args)))))))) | |
55535639 PJ |
801 | |
802 | (defun custom-set-default (variable value) | |
803 | "Default :set function for a customizable variable. | |
804 | Normally, this sets the default value of VARIABLE to VALUE, | |
805 | but if `custom-local-buffer' is non-nil, | |
806 | this sets the local binding in that buffer instead." | |
807 | (if custom-local-buffer | |
808 | (with-current-buffer custom-local-buffer | |
809 | (set variable value)) | |
810 | (set-default variable value))) | |
811 | ||
df380962 SM |
812 | (defun custom-set-minor-mode (variable value) |
813 | ":set function for minor mode variables. | |
814 | Normally, this sets the default value of VARIABLE to nil if VALUE | |
815 | is nil and to t otherwise, | |
816 | but if `custom-local-buffer' is non-nil, | |
817 | this sets the local binding in that buffer instead." | |
818 | (if custom-local-buffer | |
819 | (with-current-buffer custom-local-buffer | |
820 | (funcall variable (or value 0))) | |
821 | (funcall variable (or value 0)))) | |
822 | ||
6d912ee1 MB |
823 | (defun custom-quote (sexp) |
824 | "Quote SEXP iff it is not self quoting." | |
825 | (if (or (memq sexp '(t nil)) | |
826 | (keywordp sexp) | |
827 | (and (listp sexp) | |
828 | (memq (car sexp) '(lambda))) | |
829 | (stringp sexp) | |
830 | (numberp sexp) | |
831 | (vectorp sexp) | |
832 | ;;; (and (fboundp 'characterp) | |
833 | ;;; (characterp sexp)) | |
834 | ) | |
835 | sexp | |
836 | (list 'quote sexp))) | |
837 | ||
838 | (defun customize-mark-to-save (symbol) | |
839 | "Mark SYMBOL for later saving. | |
840 | ||
71296446 | 841 | If the default value of SYMBOL is different from the standard value, |
6d912ee1 | 842 | set the `saved-value' property to a list whose car evaluates to the |
e2cd29bd | 843 | default value. Otherwise, set it to nil. |
6d912ee1 MB |
844 | |
845 | To actually save the value, call `custom-save-all'. | |
846 | ||
847 | Return non-nil iff the `saved-value' property actually changed." | |
848 | (let* ((get (or (get symbol 'custom-get) 'default-value)) | |
849 | (value (funcall get symbol)) | |
850 | (saved (get symbol 'saved-value)) | |
851 | (standard (get symbol 'standard-value)) | |
852 | (comment (get symbol 'customized-variable-comment))) | |
853 | ;; Save default value iff different from standard value. | |
854 | (if (or (null standard) | |
855 | (not (equal value (condition-case nil | |
856 | (eval (car standard)) | |
857 | (error nil))))) | |
858 | (put symbol 'saved-value (list (custom-quote value))) | |
859 | (put symbol 'saved-value nil)) | |
860 | ;; Clear customized information (set, but not saved). | |
861 | (put symbol 'customized-value nil) | |
862 | ;; Save any comment that might have been set. | |
863 | (when comment | |
864 | (put symbol 'saved-variable-comment comment)) | |
865 | (not (equal saved (get symbol 'saved-value))))) | |
866 | ||
867 | (defun customize-mark-as-set (symbol) | |
868 | "Mark current value of SYMBOL as being set from customize. | |
869 | ||
71296446 | 870 | If the default value of SYMBOL is different from the saved value if any, |
6d912ee1 | 871 | or else if it is different from the standard value, set the |
71296446 | 872 | `customized-value' property to a list whose car evaluates to the |
e2cd29bd | 873 | default value. Otherwise, set it to nil. |
6d912ee1 MB |
874 | |
875 | Return non-nil iff the `customized-value' property actually changed." | |
876 | (let* ((get (or (get symbol 'custom-get) 'default-value)) | |
877 | (value (funcall get symbol)) | |
878 | (customized (get symbol 'customized-value)) | |
879 | (old (or (get symbol 'saved-value) (get symbol 'standard-value)))) | |
880 | ;; Mark default value as set iff different from old value. | |
881 | (if (or (null old) | |
71296446 | 882 | (not (equal value (condition-case nil |
6d912ee1 MB |
883 | (eval (car old)) |
884 | (error nil))))) | |
885 | (put symbol 'customized-value (list (custom-quote value))) | |
886 | (put symbol 'customized-value nil)) | |
887 | ;; Changed? | |
888 | (not (equal customized (get symbol 'customized-value))))) | |
889 | ||
e1bab181 RS |
890 | ;;; Theme Manipulation |
891 | ||
892 | (defvar custom-loaded-themes nil | |
893 | "Themes in the order they are loaded.") | |
894 | ||
895 | (defun custom-theme-loaded-p (theme) | |
896 | "Return non-nil when THEME has been loaded." | |
897 | (memq theme custom-loaded-themes)) | |
898 | ||
899 | (defun provide-theme (theme) | |
900 | "Indicate that this file provides THEME. | |
901 | Add THEME to `custom-loaded-themes' and `provide' whatever | |
902 | is stored in THEME's property `theme-feature'. | |
903 | ||
904 | Usually the theme-feature property contains a symbol created | |
905 | by `custom-make-theme-feature'." | |
906 | (custom-check-theme theme) | |
907 | (provide (get theme 'theme-feature)) | |
908 | (setq custom-loaded-themes (nconc (list theme) custom-loaded-themes))) | |
909 | ||
910 | (defun require-theme (theme) | |
911 | "Try to load a theme by requiring its feature. | |
912 | THEME's feature is stored in THEME's `theme-feature' property. | |
913 | ||
914 | Usually the `theme-feature' property contains a symbol created | |
915 | by `custom-make-theme-feature'." | |
916 | ;; Note we do no check for validity of the theme here. | |
917 | ;; This allows to pull in themes by a file-name convention | |
918 | (require (or (get theme 'theme-feature) | |
919 | (custom-make-theme-feature theme)))) | |
920 | ||
921 | (defun custom-remove-theme (spec-alist theme) | |
e2cd29bd | 922 | "Delete all elements from SPEC-ALIST whose car is THEME." |
e1bab181 RS |
923 | (let ((elt (assoc theme spec-alist))) |
924 | (while elt | |
925 | (setq spec-alist (delete elt spec-alist) | |
926 | elt (assoc theme spec-alist)))) | |
927 | spec-alist) | |
928 | ||
929 | (defun custom-do-theme-reset (theme) | |
930 | "Undo all settings defined by THEME. | |
931 | ||
932 | A variable remains unchanged if its property `theme-value' does not | |
933 | contain a value for THEME. A face remains unchanged if its property | |
934 | `theme-face' does not contain a value for THEME. In either case, all | |
935 | settings for THEME are removed from the property and the variable or | |
936 | face is set to the `user' theme. | |
937 | ||
938 | See `custom-known-themes' for a list of known themes." | |
939 | (let (spec-list) | |
940 | (mapatoms (lambda (symbol) | |
941 | ;; This works even if symbol is both a variable and a | |
942 | ;; face. | |
943 | (setq spec-list (get symbol 'theme-value)) | |
944 | (when spec-list | |
945 | (put symbol 'theme-value (custom-remove-theme spec-list theme)) | |
946 | (custom-theme-reset-internal symbol 'user)) | |
947 | (setq spec-list (get symbol 'theme-face)) | |
948 | (when spec-list | |
949 | (put symbol 'theme-face (custom-remove-theme spec-list theme)) | |
950 | (custom-theme-reset-internal-face symbol 'user)))))) | |
951 | ||
952 | (defun custom-theme-load-themes (by-theme &rest body) | |
953 | "Load the themes specified by BODY. | |
954 | Record them as required by theme BY-THEME. BODY is a sequence of either | |
955 | ||
956 | THEME | |
957 | BY-THEME requires THEME | |
958 | \(reset THEME) | |
959 | Undo all the settings made by THEME | |
960 | \(hidden THEME) | |
961 | Require THEME but hide it from the user | |
962 | ||
963 | All the themes loaded for BY-THEME are recorded in BY-THEME's property | |
964 | `theme-loads-themes'. Any theme loaded with the hidden predicate will | |
965 | be given the property `theme-hidden' unless it has been loaded before. | |
966 | Whether a theme has been loaded before is determined by the function | |
967 | `custom-theme-loaded-p'." | |
968 | (custom-check-theme by-theme) | |
969 | (let ((theme) | |
970 | (themes-loaded (get by-theme 'theme-loads-themes))) | |
971 | (while theme | |
972 | (setq theme (car body) | |
973 | body (cdr body)) | |
974 | (cond ((and (consp theme) (eq (car theme) 'reset)) | |
975 | (custom-do-theme-reset (cadr theme))) | |
976 | ((and (consp theme) (eq (car theme) 'hidden)) | |
977 | (require-theme (cadr theme)) | |
978 | (unless (custom-theme-loaded-p (cadr theme)) | |
979 | (put (cadr theme) 'theme-hidden t))) | |
980 | (t | |
981 | (require-theme theme) | |
982 | (put theme 'theme-hidden nil))) | |
983 | (setq themes-loaded (nconc (list theme) themes-loaded))) | |
984 | (put by-theme 'theme-loads-themes themes-loaded))) | |
985 | ||
986 | (defun custom-load-themes (&rest body) | |
987 | "Load themes for the USER theme as specified by BODY. | |
988 | ||
989 | See `custom-theme-load-themes' for more information on BODY." | |
990 | (apply 'custom-theme-load-themes 'user body)) | |
991 | ||
992 | ; (defsubst copy-upto-last (elt list) | |
993 | ; "Copy all the elements of the list upto the last occurence of elt" | |
994 | ; ;; Is it faster to do more work in C than to do less in elisp? | |
995 | ; (nreverse (cdr (member elt (reverse list))))) | |
996 | ||
997 | (defun custom-theme-value (theme theme-spec-list) | |
998 | "Determine the value for THEME defined by THEME-SPEC-LIST. | |
999 | Returns a list with the original value if found; nil otherwise. | |
1000 | ||
1001 | THEME-SPEC-LIST is an alist with themes as its key. As new themes are | |
1002 | installed, these are added to the front of THEME-SPEC-LIST. | |
1003 | Each element has the form | |
1004 | ||
1005 | \(THEME MODE VALUE) | |
1006 | ||
1007 | MODE is either the symbol `set' or the symbol `reset'. See | |
1008 | `custom-push-theme' for more information on the format of | |
1009 | THEME-SPEC-LIST." | |
1010 | ;; Note we do _NOT_ signal an error if the theme is unknown | |
1011 | ;; it might have gone away without the user knowing. | |
1012 | (let ((value (cdr (assoc theme theme-spec-list)))) | |
1013 | (if value | |
1014 | (if (eq (car value) 'set) | |
1015 | (cdr value) | |
1016 | (custom-theme-value (cadr value) theme-spec-list))))) | |
1017 | ||
1018 | (defun custom-theme-variable-value (variable theme) | |
1019 | "Return (list value) indicating value of VARIABLE in THEME. | |
1020 | If THEME does not define a value for VARIABLE, return nil. The value | |
1021 | definitions per theme are stored in VARIABLE's property `theme-value'. | |
1022 | The actual work is done by function `custom-theme-value', which see. | |
1023 | See `custom-push-theme' for more information on how these definitions | |
1024 | are stored." | |
1025 | (custom-theme-value theme (get variable 'theme-value))) | |
1026 | ||
1027 | (defun custom-theme-reset-internal (symbol to-theme) | |
1028 | "Reset SYMBOL to the value defined by TO-THEME. | |
1029 | If SYMBOL is not defined in TO-THEME, reset SYMBOL to the standard | |
1030 | value. See `custom-theme-variable-value'. The standard value is | |
1031 | stored in SYMBOL's property `standard-value'." | |
1032 | (let ((value (custom-theme-variable-value symbol to-theme)) | |
1033 | was-in-theme) | |
1034 | (setq was-in-theme value) | |
1035 | (setq value (or value (get symbol 'standard-value))) | |
1036 | (when value | |
1037 | (put symbol 'saved-value was-in-theme) | |
1038 | (if (or (get 'force-value symbol) (default-boundp symbol)) | |
1039 | (funcall (or (get symbol 'custom-set) 'set-default) symbol | |
1040 | (eval (car value))))) | |
1041 | value)) | |
1042 | ||
1043 | (defun custom-theme-reset-variables (theme &rest args) | |
1044 | "Reset the value of the variables to values previously defined. | |
1045 | Associate this setting with THEME. | |
1046 | ||
1047 | ARGS is a list of lists of the form | |
1048 | ||
1049 | (VARIABLE TO-THEME) | |
1050 | ||
1051 | This means reset VARIABLE to its value in TO-THEME." | |
1052 | (custom-check-theme theme) | |
1053 | (mapcar '(lambda (arg) | |
1054 | (apply 'custom-theme-reset-internal arg) | |
1055 | (custom-push-theme 'theme-value (car arg) theme 'reset (cadr arg))) | |
1056 | args)) | |
1057 | ||
1058 | (defun custom-reset-variables (&rest args) | |
1059 | "Reset the value of the variables to values previously saved. | |
1060 | This is the setting associated the `user' theme. | |
1061 | ||
1062 | ARGS is a list of lists of the form | |
1063 | ||
1064 | (VARIABLE TO-THEME) | |
1065 | ||
1066 | This means reset VARIABLE to its value in TO-THEME." | |
1067 | (apply 'custom-theme-reset-variables 'user args)) | |
1068 | ||
55535639 PJ |
1069 | ;;; The End. |
1070 | ||
1071 | ;; Process the defcustoms for variables loaded before this file. | |
1072 | (while custom-declare-variable-list | |
1073 | (apply 'custom-declare-variable (car custom-declare-variable-list)) | |
1074 | (setq custom-declare-variable-list (cdr custom-declare-variable-list))) | |
1075 | ||
1076 | (provide 'custom) | |
1077 | ||
ab5796a9 | 1078 | ;;; arch-tag: 041b6116-aabe-4f9a-902d-74092bc3dab2 |
55535639 | 1079 | ;;; custom.el ends here |