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1 ;;; custom.el -- Tools for declaring and initializing options.
2
3 ;; Copyright (C) 1996, 1997 Free Software Foundation, Inc.
4
5 ;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
6 ;; Maintainer: Hrvoje Niksic <hniksic@xemacs.org>
7 ;; Keywords: help, faces, dumped
8 ;; Version: 1.9960-x
9 ;; X-URL: http://www.dina.kvl.dk/~abraham/custom/
10
11 ;; This file is part of XEmacs.
12
13 ;; XEmacs is free software; you can redistribute it and/or modify
14 ;; it under the terms of the GNU General Public License as published by
15 ;; the Free Software Foundation; either version 2, or (at your option)
16 ;; any later version.
17
18 ;; XEmacs is distributed in the hope that it will be useful,
19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ;; GNU General Public License for more details.
22
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with XEmacs; see the file COPYING. If not, write to the
25 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
26 ;; Boston, MA 02111-1307, USA.
27
28 ;;; Commentary:
29
30 ;; This file is dumped with XEmacs.
31
32 ;; This file only contain the code needed to declare and initialize
33 ;; user options. The code to customize options is autoloaded from
34 ;; `cus-edit.el'.
35 ;;
36 ;; The code implementing face declarations is in `cus-face.el'
37
38 ;;; Code:
39
40 (eval-when-compile
41 (load "cl-macs"))
42
43 (if (not (fboundp 'defun*))
44 (autoload 'defun* "cl-macs"))
45
46 (require 'widget)
47
48 (defvar custom-define-hook nil
49 ;; Customize information for this option is in `cus-edit.el'.
50 "Hook called after defining each customize option.")
51
52 ;;; The `defcustom' Macro.
53
54 (defun custom-initialize-default (symbol value)
55 "Initialize SYMBOL with VALUE.
56 This will do nothing if symbol already has a default binding.
57 Otherwise, if symbol has a `saved-value' property, it will evaluate
58 the car of that and used as the default binding for symbol.
59 Otherwise, VALUE will be evaluated and used as the default binding for
60 symbol."
61 (unless (default-boundp symbol)
62 ;; Use the saved value if it exists, otherwise the standard setting.
63 (set-default symbol (if (get symbol 'saved-value)
64 (eval (car (get symbol 'saved-value)))
65 (eval value)))))
66
67 (defun custom-initialize-set (symbol value)
68 "Initialize SYMBOL with VALUE.
69 Like `custom-initialize-default', but use the function specified by
70 `:set' to initialize SYMBOL."
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 with VALUE.
80 Like `custom-initialize-set', but use the function specified by
81 `:get' to reinitialize SYMBOL if it is already bound."
82 (funcall (or (get symbol 'custom-set) 'set-default)
83 symbol
84 (cond ((default-boundp symbol)
85 (funcall (or (get symbol 'custom-get) 'default-value)
86 symbol))
87 ((get symbol 'saved-value)
88 (eval (car (get symbol 'saved-value))))
89 (t
90 (eval value)))))
91
92 (defun custom-initialize-changed (symbol value)
93 "Initialize SYMBOL with VALUE.
94 Like `custom-initialize-reset', but only use the `:set' function if the
95 not using the standard setting. Otherwise, use the `set-default'."
96 (cond ((default-boundp symbol)
97 (funcall (or (get symbol 'custom-set) 'set-default)
98 symbol
99 (funcall (or (get symbol 'custom-get) 'default-value)
100 symbol)))
101 ((get symbol 'saved-value)
102 (funcall (or (get symbol 'custom-set) 'set-default)
103 symbol
104 (eval (car (get symbol 'saved-value)))))
105 (t
106 (set-default symbol (eval value)))))
107
108 (defun custom-declare-variable (symbol value doc &rest args)
109 "Like `defcustom', but SYMBOL and VALUE are evaluated as normal arguments."
110 ;; Remember the standard setting.
111 (put symbol 'standard-value (list value))
112 ;; Maybe this option was rogue in an earlier version. It no longer is.
113 (when (eq (get symbol 'force-value) 'rogue)
114 ;; It no longer is.
115 (put symbol 'force-value nil))
116 (when doc
117 (put symbol 'variable-documentation doc))
118 (let ((initialize 'custom-initialize-reset)
119 (requests nil))
120 (while args
121 (let ((arg (car args)))
122 (setq args (cdr args))
123 (check-argument-type 'keywordp arg)
124 (let ((keyword arg)
125 (value (car args)))
126 (unless args
127 (signal 'error (list "Keyword is missing an argument" keyword)))
128 (setq args (cdr args))
129 (cond ((eq keyword :initialize)
130 (setq initialize value))
131 ((eq keyword :set)
132 (put symbol 'custom-set value))
133 ((eq keyword :get)
134 (put symbol 'custom-get value))
135 ((eq keyword :require)
136 (setq requests (cons value requests)))
137 ((eq keyword :type)
138 (put symbol 'custom-type value))
139 ((eq keyword :options)
140 (if (get symbol 'custom-options)
141 ;; Slow safe code to avoid duplicates.
142 (mapc (lambda (option)
143 (custom-add-option symbol option))
144 value)
145 ;; Fast code for the common case.
146 (put symbol 'custom-options (copy-sequence value))))
147 (t
148 (custom-handle-keyword symbol keyword value
149 'custom-variable))))))
150 (put symbol 'custom-requests requests)
151 ;; Do the actual initialization.
152 (funcall initialize symbol value))
153 ;; #### This is a rough equivalent of LOADHIST_ATTACH. However,
154 ;; LOADHIST_ATTACH also checks for `initialized'.
155 (push symbol current-load-list)
156 (run-hooks 'custom-define-hook)
157 symbol)
158
159 (defmacro defcustom (symbol value doc &rest args)
160 "Declare SYMBOL as a customizable variable that defaults to VALUE.
161 DOC is the variable documentation.
162
163 Neither SYMBOL nor VALUE needs to be quoted.
164 If SYMBOL is not already bound, initialize it to VALUE.
165 The remaining arguments should have the form
166
167 [KEYWORD VALUE]...
168
169 The following KEYWORD's are defined:
170
171 :type VALUE should be a widget type for editing the symbols value.
172 The default is `sexp'.
173 :options VALUE should be a list of valid members of the widget type.
174 :group VALUE should be a customization group.
175 Add SYMBOL to that group.
176 :initialize VALUE should be a function used to initialize the
177 variable. It takes two arguments, the symbol and value
178 given in the `defcustom' call. The default is
179 `custom-initialize-set'
180 :set VALUE should be a function to set the value of the symbol.
181 It takes two arguments, the symbol to set and the value to
182 give it. The default is `set-default'.
183 :get VALUE should be a function to extract the value of symbol.
184 The function takes one argument, a symbol, and should return
185 the current value for that symbol. The default is
186 `default-value'.
187 :require VALUE should be a feature symbol. Each feature will be
188 required after initialization, of the the user have saved this
189 option.
190
191 Read the section about customization in the Emacs Lisp manual for more
192 information."
193 `(custom-declare-variable (quote ,symbol) (quote ,value) ,doc ,@args))
194
195 ;;; The `defface' Macro.
196
197 (defmacro defface (face spec doc &rest args)
198 "Declare FACE as a customizable face that defaults to SPEC.
199 FACE does not need to be quoted.
200
201 Third argument DOC is the face documentation.
202
203 If FACE has been set with `custom-set-face', set the face attributes
204 as specified by that function, otherwise set the face attributes
205 according to SPEC.
206
207 The remaining arguments should have the form
208
209 [KEYWORD VALUE]...
210
211 The following KEYWORDs are defined:
212
213 :group VALUE should be a customization group.
214 Add FACE to that group.
215
216 SPEC should be an alist of the form ((DISPLAY ATTS)...).
217
218 ATTS is a list of face attributes and their values. The possible
219 attributes are defined in the variable `custom-face-attributes'.
220
221 The ATTS of the first entry in SPEC where the DISPLAY matches the
222 frame should take effect in that frame. DISPLAY can either be the
223 symbol t, which will match all frames, or an alist of the form
224 \((REQ ITEM...)...)
225
226 For the DISPLAY to match a FRAME, the REQ property of the frame must
227 match one of the ITEM. The following REQ are defined:
228
229 `type' (the value of `window-system')
230 Should be one of `x' or `tty'.
231
232 `class' (the frame's color support)
233 Should be one of `color', `grayscale', or `mono'.
234
235 `background' (what color is used for the background text)
236 Should be one of `light' or `dark'.
237
238 Read the section about customization in the Emacs Lisp manual for more
239 information."
240 `(custom-declare-face (quote ,face) ,spec ,doc ,@args))
241
242 ;;; The `defgroup' Macro.
243
244 (defun custom-declare-group (symbol members doc &rest args)
245 "Like `defgroup', but SYMBOL is evaluated as a normal argument."
246 (while members
247 (apply 'custom-add-to-group symbol (car members))
248 (pop members))
249 (put symbol 'custom-group (nconc members (get symbol 'custom-group)))
250 (when doc
251 (put symbol 'group-documentation doc))
252 (while args
253 (let ((arg (car args)))
254 (setq args (cdr args))
255 (check-argument-type 'keywordp arg)
256 (let ((keyword arg)
257 (value (car args)))
258 (unless args
259 (signal 'error (list "Keyword is missing an argument" keyword)))
260 (setq args (cdr args))
261 (cond ((eq keyword :prefix)
262 (put symbol 'custom-prefix value))
263 (t
264 (custom-handle-keyword symbol keyword value
265 'custom-group))))))
266 (run-hooks 'custom-define-hook)
267 symbol)
268
269 (defmacro defgroup (symbol members doc &rest args)
270 "Declare SYMBOL as a customization group containing MEMBERS.
271 SYMBOL does not need to be quoted.
272
273 Third arg DOC is the group documentation.
274
275 MEMBERS should be an alist of the form ((NAME WIDGET)...) where NAME
276 is a symbol and WIDGET is a widget for editing that symbol. Useful
277 widgets are `custom-variable' for editing variables, `custom-face' for
278 edit faces, and `custom-group' for editing groups.
279
280 The remaining arguments should have the form
281
282 [KEYWORD VALUE]...
283
284 The following KEYWORD's are defined:
285
286 :group VALUE should be a customization group.
287 Add SYMBOL to that group.
288
289 Read the section about customization in the Emacs Lisp manual for more
290 information."
291 `(custom-declare-group (quote ,symbol) ,members ,doc ,@args))
292
293 (defvar custom-group-hash-table (make-hash-table :size 300 :test 'eq)
294 "Hash-table of non-empty groups.")
295
296 (defun custom-add-to-group (group option widget)
297 "To existing GROUP add a new OPTION of type WIDGET.
298 If there already is an entry for that option, overwrite it."
299 (let* ((members (get group 'custom-group))
300 (old (assq option members)))
301 (if old
302 (setcar (cdr old) widget)
303 (put group 'custom-group (nconc members (list (list option widget))))))
304 (puthash group t custom-group-hash-table))
305
306 ;;; Properties.
307
308 (defun custom-handle-all-keywords (symbol args type)
309 "For customization option SYMBOL, handle keyword arguments ARGS.
310 Third argument TYPE is the custom option type."
311 (while args
312 (let ((arg (car args)))
313 (setq args (cdr args))
314 (check-argument-type 'keywordp arg)
315 (let ((keyword arg)
316 (value (car args)))
317 (unless args
318 (signal 'error (list "Keyword is missing an argument" keyword)))
319 (setq args (cdr args))
320 (custom-handle-keyword symbol keyword value type)))))
321
322 (defun custom-handle-keyword (symbol keyword value type)
323 "For customization option SYMBOL, handle KEYWORD with VALUE.
324 Fourth argument TYPE is the custom option type."
325 (cond ((eq keyword :group)
326 (custom-add-to-group value symbol type))
327 ((eq keyword :version)
328 (custom-add-version symbol value))
329 ((eq keyword :link)
330 (custom-add-link symbol value))
331 ((eq keyword :load)
332 (custom-add-load symbol value))
333 ((eq keyword :tag)
334 (put symbol 'custom-tag value))
335 (t
336 (signal 'error (list "Unknown keyword" keyword)))))
337
338 (defun custom-add-option (symbol option)
339 "To the variable SYMBOL add OPTION.
340
341 If SYMBOL is a hook variable, OPTION should be a hook member.
342 For other types variables, the effect is undefined."
343 (let ((options (get symbol 'custom-options)))
344 (unless (member option options)
345 (put symbol 'custom-options (cons option options)))))
346
347 (defun custom-add-link (symbol widget)
348 "To the custom option SYMBOL add the link WIDGET."
349 (let ((links (get symbol 'custom-links)))
350 (unless (member widget links)
351 (put symbol 'custom-links (cons widget links)))))
352
353 (defun custom-add-version (symbol version)
354 "To the custom option SYMBOL add the version VERSION."
355 (put symbol 'custom-version version))
356
357 (defun custom-add-load (symbol load)
358 "To the custom option SYMBOL add the dependency LOAD.
359 LOAD should be either a library file name, or a feature name."
360 (puthash symbol t custom-group-hash-table)
361 (let ((loads (get symbol 'custom-loads)))
362 (unless (member load loads)
363 (put symbol 'custom-loads (cons load loads)))))
364
365 ;;; deftheme macro
366
367 (defvar custom-known-themes '(user standard)
368 "Themes that have been defthemed.")
369
370 ;; #### add strings for group
371 ;; #### during bootstrap we cannot use cl-macs stuff
372 (defun* custom-define-theme (theme feature &optional doc
373 &key short-description immediate variable-reset-string
374 variable-set-string face-set-string face-reset-string
375 &allow-other-keys)
376 (push theme custom-known-themes)
377 (put theme 'theme-feature feature)
378 (put theme 'theme-documentation doc)
379 (if immediate (put theme 'theme-immediate immediate))
380 (if variable-reset-string
381 (put theme 'theme-variable-reset-string variable-reset-string ))
382 (if variable-set-string
383 (put theme 'theme-variable-set-string variable-set-string ))
384 (if face-reset-string
385 (put theme 'theme-face-reset-string face-reset-string ))
386 (if face-set-string
387 (put theme 'theme-face-set-string face-set-string ))
388 (if short-description
389 (put theme 'theme-short-description short-description )))
390
391 (defun custom-make-theme-feature (theme)
392 (intern (concat (symbol-name theme) "-theme")))
393
394 (defmacro deftheme (theme &rest body)
395 "(deftheme THEME &optional DOC &key KEYWORDS)
396
397 Define a theme labeled by SYMBOL THEME. The optional argument DOC is a
398 doc string describing the the theme. It is optionally followed by the
399 following keyboard arguments
400
401 :short-description DESC
402 DESC is a short (one line) description of the theme. If not given DOC
403 is used.
404 :immediate FLAG
405 If FLAG is non-nil variables set in this theme are bound
406 immediately when loading the theme.
407 :variable-set-string VARIABLE_-SET-STRING
408 A string used by the UI to indicate that the value takes it
409 setting from this theme. It is passed to FORMAT with the
410 name of the theme a additional argument.
411 If not given, a generic description is used.
412 :variable-reset-string VARIABLE-RESET-STRING
413 As above but used in the case the variable has been forced to
414 the value in this theme.
415 :face-set-string FACE-SET-STRING
416 :face-reset-string FACE-RESET-STRING
417 As above but for faces."
418 (let ((feature (custom-make-theme-feature theme)))
419 `(custom-define-theme (quote ,theme) (quote ,feature) ,@body)))
420
421 (defsubst custom-theme-p (theme)
422 "Non-nil when THEME has been defined."
423 (memq theme custom-known-themes))
424
425 (defsubst custom-check-theme (theme)
426 "Check whether THEME is valid and signal an error if NOT"
427 (unless (custom-theme-p theme)
428 (error "Unknown theme `%s'" theme)))
429
430
431 ; #### do we need to deftheme 'user and/or 'standard here to make the
432 ; code in cus-edit cleaner?.
433
434 ;;; Initializing.
435
436 (defun custom-push-theme (prop symbol theme mode value)
437 (let ((old (get symbol prop)))
438 (if (eq (car-safe (car-safe old)) theme)
439 (setq old (cdr old)))
440 (put symbol prop (cons (list theme mode value) old))))
441
442 (defun custom-set-variables (&rest args)
443 "Initialize variables according to user preferences.
444 The settings are registered as theme `user'.
445 The arguments should be a list where each entry has the form:
446
447 (SYMBOL VALUE [NOW [REQUEST [COMMENT]]])
448
449 The unevaluated VALUE is stored as the saved value for SYMBOL.
450 If NOW is present and non-nil, VALUE is also evaluated and bound as
451 the default value for the SYMBOL.
452 REQUEST is a list of features we must 'require for SYMBOL.
453 COMMENT is a comment string about SYMBOL."
454 (apply 'custom-theme-set-variables 'user args))
455
456 (defun custom-theme-set-variables (theme &rest args)
457 "Initialize variables according to settings specified by args.
458 Records the settings as belonging to THEME.
459
460 See `custom-set-variables' for a description of the arguments ARGS."
461 (custom-check-theme theme)
462 (let ((immediate (get theme 'theme-immediate)))
463 (while args * etc/custom/example-themes/example-theme.el:
464 (let ((entry (car args)))
465 (if (listp entry)
466 (let* ((symbol (nth 0 entry))
467 (value (nth 1 entry))
468 (now (nth 2 entry))
469 (requests (nth 3 entry))
470 (comment (nth 4 entry))
471 (set (or (get symbol 'custom-set) 'set-default)))
472 (put symbol 'saved-value (list value))
473 (custom-push-theme 'theme-value symbol theme 'set value)
474 (put symbol 'saved-variable-comment comment)
475 (cond ((or now immediate)
476 ;; Rogue variable, set it now.
477 (put symbol 'force-value (if now 'rogue 'immediate))
478 (funcall set symbol (eval value)))
479 ((default-boundp symbol)
480 ;; Something already set this, overwrite it.
481 (funcall set symbol (eval value))))
482 (and (or now (default-boundp symbol))
483 (put symbol 'variable-comment comment))
484 (when requests
485 (put symbol 'custom-requests requests)
486 (mapc 'require requests))
487 (setq args (cdr args)))
488 ;; Old format, a plist of SYMBOL VALUE pairs.
489 (message "Warning: old format `custom-set-variables'")
490 (ding)
491 (sit-for 2)
492 (let ((symbol (nth 0 args))
493 (value (nth 1 args)))
494 (put symbol 'saved-value (list value))
495 (custom-push-theme 'theme-value symbol theme 'set value))
496 (setq args (cdr (cdr args))))))))
497
498 (defvar custom-loaded-themes nil
499 "Themes in the order they are loaded.")
500
501 (defun custom-theme-loaded-p (theme)
502 "Return non-nil when THEME has been loaded."
503 (memq theme custom-loaded-themes))
504
505 (defun provide-theme (theme)
506 "Indicate that this file provides THEME."
507 (custom-check-theme theme)
508 (provide (get theme 'theme-feature))
509 (push theme custom-loaded-themes))
510
511 (defun require-theme (theme &optional soft)
512 "Try to load a theme by requiring its feature."
513 ;; Note we do no check for validity of the theme here.
514 ;; This allows to pull in themes by a file-name convention
515 (require (get theme 'theme-feature (custom-make-theme-feature theme))))
516
517 (defun custom-do-theme-reset (theme)
518 ; #### untested! slow!
519 (let (spec-list)
520 (mapatoms (lambda (symbol)
521 (setq spec-list (get symbol 'theme-value))
522 (when spec-list
523 (setq spec-list (delete-if (lambda (elt)
524 (eq (car elt) theme))
525 spec-list))
526 (put symbol 'theme-value spec-list)
527 (custom-theme-reset-internal symbol 'user))
528 (setq spec-list (get symbol 'theme-face))
529 (when spec-list
530 (setq spec-list (delete-if (lambda (elt)
531 (eq (car elt) theme))
532 spec-list))
533 (put symbol 'theme-face spec-list)
534 (custom-theme-reset-internal-face symbol 'user))))))
535
536 (defun custom-theme-load-themes (by-theme &rest body)
537 "Load the themes specified by BODY and record them as required by
538 theme BY-THEME. BODY is a secuence of
539 - a SYMBOL
540 require the theme SYMBOL
541 - a list (reset THEME)
542 Undo all the settings made by THEME.
543 - a list (hidden THEME)
544 require the THEME but hide it from the user."
545 (custom-check-theme by-theme)
546 (dolist (theme body)
547 (cond ((and (consp theme) (eq (car theme) 'reset))
548 (custom-do-theme-reset (cadr theme)))
549 ((and (consp theme) (eq (car theme) 'hidden))
550 (require-theme (cadr theme))
551 (unless (custom-theme-loaded-p (cadr theme))
552 (put (cadr theme) 'theme-hidden t)))
553 (t
554 (require-theme theme)
555 (remprop theme 'theme-hidden)))
556 (push theme (get by-theme 'theme-loads-themes))))
557
558 (defun custom-load-themes (&rest body)
559 "Load themes for the USER theme as specified by BODY.
560
561 BODY is as with custom-theme-load-themes."
562 (apply #'custom-theme-load-themes 'user body))
563
564
565
566
567 (defsubst copy-upto-last (elt list)
568 "Copy all the elements of the list upto the last occurence of elt"
569 ;; Is it faster to do more work in C than to do less in elisp?
570 (nreverse (cdr (member elt (reverse list)))))
571
572 (defun custom-theme-value (theme theme-spec-list)
573 "Determine the value for THEME defined by THEME-SPEC-LIST.
574 Returns (list value) if found. Nil otherwise."
575 ;; Note we do _NOT_ singal an error if the theme is unkown
576 ;; it might have gone away without the user knowing.
577 (let ((theme-or-lower (memq theme (cons 'user custom-loaded-themes)))
578 value)
579 (mapc #'(lambda (theme-spec)
580 (when (member (car theme-spec) theme-or-lower)
581 (setq value (cdr theme-spec))
582 ;; We need to continue because if theme =A and we found
583 ;; B then if the load order is B A C B
584 ;; we actually want the value in C.
585 (setq theme-or-lower (copy-upto-last (car theme-spec)
586 theme-or-lower))
587 ;; We could should circuit if this is now nil.
588 ))
589 theme-spec-list)
590 (if value
591 (if (eq (car value) 'set)
592 (list (cadr value))
593 ;; Yet another reset spec. car value = reset
594 (custom-theme-value (cadr value) theme-spec-list)))))
595
596
597 (defun custom-theme-variable-value (variable theme)
598 "Return (list value) value of VARIABLE in THEME if the THEME modifies the
599 VARIABLE. Nil otherwise."
600 (custom-theme-value theme (get variable 'theme-value)))
601
602 (defun custom-theme-reset-internal (symbol to-theme)
603 (let ((value (custom-theme-variable-value symbol to-theme))
604 was-in-theme)
605 (setq was-in-theme value)
606 (setq value (or value (get symbol 'standard-value)))
607 (when value
608 (put symbol 'saved-value was-in-theme)
609 (if (or (get 'force-value symbol) (default-boundp symbol))
610 (funcall (get symbol 'custom-set 'set-default) symbol
611 (eval (car value)))))
612 value))
613
614
615 (defun custom-theme-reset-variables (theme &rest args)
616 "Reset the value of the variables to values previously defined.
617 Assosiate this setting with THEME.
618
619 ARGS is a list of lists of the form
620
621 (variable to-theme)
622
623 This means reset variable to its value in to-theme."
624 (custom-check-theme theme)
625 (mapc #'(lambda (arg)
626 (apply #'custom-theme-reset-internal arg)
627 (custom-push-theme 'theme-value (car arg) theme 'reset (cadr arg)))
628 args))
629
630 (defun custom-reset-variables (&rest args)
631 "Reset the value of the variables to values previously defined.
632 Assosiate this setting with the `user' theme.
633
634 The ARGS are as in `custom-theme-reset-variables'."
635 (apply #'custom-theme-reset-variables 'user args))
636
637
638 ;;; The End.
639
640 (provide 'custom)
641
642 ;; custom.el ends here