-;;; custom.el -- Tools for declaring and initializing options.
+;;; custom.el --- tools for declaring and initializing options
;;
-;; Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+;; Copyright (C) 1996, 1997, 1999, 2001, 2002, 2004, 2005
+;; Free Software Foundation, Inc.
;;
;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
+;; Maintainer: FSF
;; Keywords: help, faces
-;; Version: 1.9900
-;; X-URL: http://www.dina.kvl.dk/~abraham/custom/
;; This file is part of GNU Emacs.
;;; Commentary:
;;
-;; If you want to use this code, please visit the URL above.
-;;
-;; This file only contain the code needed to declare and initialize
+;; This file only contains the code needed to declare and initialize
;; user options. The code to customize options is autoloaded from
-;; `cus-edit.el'.
+;; `cus-edit.el' and is documented in the Emacs Lisp Reference manual.
-;; The code implementing face declarations is in `cus-face.el'
+;; The code implementing face declarations is in `cus-face.el'.
;;; Code:
(require 'widget)
-(define-widget-keywords :initialize :set :get :require :prefix :tag
- :load :link :options :type :group)
-
-
(defvar custom-define-hook nil
;; Customize information for this option is in `cus-edit.el'.
"Hook called after defining each customize option.")
+(defvar custom-dont-initialize nil
+ "Non-nil means `defcustom' should not initialize the variable.
+That is used for the sake of `custom-make-dependencies'.
+Users should not set it.")
+
+(defvar custom-current-group-alist nil
+ "Alist of (FILE . GROUP) indicating the current group to use for FILE.")
+
;;; The `defcustom' Macro.
(defun custom-initialize-default (symbol value)
"Initialize SYMBOL with VALUE.
This will do nothing if symbol already has a default binding.
Otherwise, if symbol has a `saved-value' property, it will evaluate
-the car of that and used as the default binding for symbol.
+the car of that and use it as the default binding for symbol.
Otherwise, VALUE will be evaluated and used as the default binding for
symbol."
(unless (default-boundp symbol)
if any, or VALUE."
(unless (default-boundp symbol)
(funcall (or (get symbol 'custom-set) 'set-default)
- symbol
+ symbol
(if (get symbol 'saved-value)
(eval (car (get symbol 'saved-value)))
(eval value)))))
or the value in the symbol's `saved-value' property if any,
or (last of all) VALUE."
(funcall (or (get symbol 'custom-set) 'set-default)
- symbol
+ symbol
(cond ((default-boundp symbol)
(funcall (or (get symbol 'custom-get) 'default-value)
symbol))
(defun custom-initialize-changed (symbol value)
"Initialize SYMBOL with VALUE.
-Like `custom-initialize-reset', but only use the `:set' function if the
+Like `custom-initialize-reset', but only use the `:set' function if
not using the standard setting.
-For the standard setting, use the `set-default'."
+For the standard setting, use `set-default'."
(cond ((default-boundp symbol)
(funcall (or (get symbol 'custom-set) 'set-default)
symbol
(defun custom-declare-variable (symbol default doc &rest args)
"Like `defcustom', but SYMBOL and DEFAULT are evaluated as normal arguments.
DEFAULT should be an expression to evaluate to compute the default value,
-not the default value itself."
- ;; Remember the standard setting.
+not the default value itself.
+
+DEFAULT is stored as SYMBOL's value in the standard theme. See
+`custom-known-themes' for a list of known themes. For backwards
+compatibility, DEFAULT is also stored in SYMBOL's property
+`standard-value'. At the same time, SYMBOL's property `force-value' is
+set to nil, as the value is no longer rogue."
+ ;; Remember the standard setting. The value should be in the standard
+ ;; theme, not in this property. However, his would require changeing
+ ;; the C source of defvar and others as well...
(put symbol 'standard-value (list default))
;; Maybe this option was rogue in an earlier version. It no longer is.
(when (get symbol 'force-value)
- ;; It no longer is.
(put symbol 'force-value nil))
(when doc
(put symbol 'variable-documentation doc))
(let ((initialize 'custom-initialize-reset)
(requests nil))
- (while args
+ (unless (memq :group args)
+ (custom-add-to-group (custom-current-group) symbol 'custom-variable))
+ (while args
(let ((arg (car args)))
(setq args (cdr args))
(unless (symbolp arg)
((eq keyword :get)
(put symbol 'custom-get value))
((eq keyword :require)
- (setq requests (cons value requests)))
+ (push value requests))
((eq keyword :type)
- (put symbol 'custom-type value))
+ (put symbol 'custom-type (purecopy value)))
((eq keyword :options)
(if (get symbol 'custom-options)
;; Slow safe code to avoid duplicates.
- (mapcar (lambda (option)
- (custom-add-option symbol option))
- value)
+ (mapc (lambda (option)
+ (custom-add-option symbol option))
+ value)
;; Fast code for the common case.
(put symbol 'custom-options (copy-sequence value))))
(t
'custom-variable))))))
(put symbol 'custom-requests requests)
;; Do the actual initialization.
- (funcall initialize symbol default))
+ (unless custom-dont-initialize
+ (funcall initialize symbol default)))
+ (push symbol current-load-list)
(run-hooks 'custom-define-hook)
symbol)
"Declare SYMBOL as a customizable variable that defaults to VALUE.
DOC is the variable documentation.
-Neither SYMBOL nor VALUE needs to be quoted.
+Neither SYMBOL nor VALUE need to be quoted.
If SYMBOL is not already bound, initialize it to VALUE.
The remaining arguments should have the form
- [KEYWORD VALUE]...
+ [KEYWORD VALUE]...
-The following KEYWORD's are defined:
+The following keywords are meaningful:
-:type VALUE should be a widget type for editing the symbols value.
- The default is `sexp'.
+:type VALUE should be a widget type for editing the symbol's value.
:options VALUE should be a list of valid members of the widget type.
-:group VALUE should be a customization group.
+:group VALUE should be a customization group.
Add SYMBOL to that group.
-:initialize VALUE should be a function used to initialize the
+:link LINK-DATA
+ Include an external link after the documentation string for this
+ item. This is a sentence containing an active field which
+ references some other documentation.
+
+ There are three alternatives you can use for LINK-DATA:
+
+ (custom-manual INFO-NODE)
+ Link to an Info node; INFO-NODE is a string which specifies
+ the node name, as in \"(emacs)Top\". The link appears as
+ `[manual]' in the customization buffer.
+
+ (info-link INFO-NODE)
+ Like `custom-manual' except that the link appears in the
+ customization buffer with the Info node name.
+
+ (url-link URL)
+ Link to a web page; URL is a string which specifies the URL.
+ The link appears in the customization buffer as URL.
+
+ You can specify the text to use in the customization buffer by
+ adding `:tag NAME' after the first element of the LINK-DATA; for
+ example, (info-link :tag \"foo\" \"(emacs)Top\") makes a link to the
+ Emacs manual which appears in the buffer as `foo'.
+
+ An item can have more than one external link; however, most items
+ have none at all.
+:initialize
+ VALUE should be a function used to initialize the
variable. It takes two arguments, the symbol and value
given in the `defcustom' call. The default is
- `custom-initialize-default'
-:set VALUE should be a function to set the value of the symbol.
+ `custom-initialize-reset'.
+:set VALUE should be a function to set the value of the symbol.
It takes two arguments, the symbol to set and the value to
- give it. The default is `set-default'.
+ give it. The default choice of function is `custom-set-default'.
:get VALUE should be a function to extract the value of symbol.
The function takes one argument, a symbol, and should return
- the current value for that symbol. The default is
- `default-value'.
-:require VALUE should be a feature symbol. Each feature will be
- required after initialization, of the the user have saved this
- option.
+ the current value for that symbol. The default choice of function
+ is `custom-default-value'.
+:require
+ VALUE should be a feature symbol. If you save a value
+ for this option, then when your `.emacs' file loads the value,
+ it does (require VALUE) first.
+:version
+ VALUE should be a string specifying that the variable was
+ first introduced, or its default value was changed, in Emacs
+ version VERSION.
+:tag LABEL
+ Use LABEL, a string, instead of the item's name, to label the item
+ in customization menus and buffers.
+:load FILE
+ Load file FILE (a string) before displaying this customization
+ item. Loading is done with `load', and only if the file is
+ not already loaded.
+:set-after VARIABLES
+ Specifies that SYMBOL should be set after the list of variables
+ VARIABLES when both have been customized.
+
+If SYMBOL has a local binding, then this form affects the local
+binding. This is normally not what you want. Thus, if you need
+to load a file defining variables with this form, or with
+`defvar' or `defconst', you should always load that file
+_outside_ any bindings for these variables. \(`defvar' and
+`defconst' behave similarly in this respect.)
Read the section about customization in the Emacs Lisp manual for more
information."
- `(custom-declare-variable (quote ,symbol) (quote ,value) ,doc ,@args))
+ ;; It is better not to use backquote in this file,
+ ;; because that makes a bootstrapping problem
+ ;; if you need to recompile all the Lisp files using interpreted code.
+ (nconc (list 'custom-declare-variable
+ (list 'quote symbol)
+ (list 'quote value)
+ doc)
+ args))
;;; The `defface' Macro.
Third argument DOC is the face documentation.
-If FACE has been set with `custom-set-face', set the face attributes
+If FACE has been set with `custom-set-faces', set the face attributes
as specified by that function, otherwise set the face attributes
according to SPEC.
SPEC should be an alist of the form ((DISPLAY ATTS)...).
-The first element of SPEC where the DISPLAY matches the frame
-is the one that takes effect in that frame. The ATTRs in this
-element take effect; the other elements are ignored, on that frame.
+In the first element, DISPLAY can be :default. The ATTS in that
+element then act as defaults for all the following elements.
+
+Aside from that, DISPLAY specifies conditions to match some or
+all frames. For each frame, the first element of SPEC where the
+DISPLAY conditions are satisfied is the one that applies to that
+frame. The ATTRs in this element take effect, and the following
+elements are ignored, on that frame.
+
+In the last element, DISPLAY can be t. That element applies to a
+frame if none of the previous elements (except the :default if
+any) did.
ATTS is a list of face attributes followed by their values:
(ATTR VALUE ATTR VALUE...)
-The possible attributes are `:bold', `:italic', `:underline',
-`:foreground', `:background', `:stipple' and `:inverse-video'.
-DISPLAY can either be the symbol t, which will match all frames, or an
-alist of the form \((REQ ITEM...)...). For the DISPLAY to match a
-FRAME, the REQ property of the frame must match one of the ITEM. The
-following REQ are defined:
+The possible attributes are `:family', `:width', `:height', `:weight',
+`:slant', `:underline', `:overline', `:strike-through', `:box',
+`:foreground', `:background', `:stipple', `:inverse-video', and `:inherit'.
+
+DISPLAY can be `:default' (only in the first element), the symbol
+t (only in the last element) to match all frames, or an alist of
+conditions of the form \(REQ ITEM...). For such an alist to
+match a frame, each of the conditions must be satisfied, meaning
+that the REQ property of the frame must match one of the
+corresponding ITEMs. These are the defined REQ values:
`type' (the value of `window-system')
- Should be one of `x' or `tty'.
+ Under X, in addition to the values `window-system' can take,
+ `motif', `lucid', `gtk' and `x-toolkit' are allowed, and match when
+ the Motif toolkit, Lucid toolkit, GTK toolkit or any X toolkit is in use.
`class' (the frame's color support)
Should be one of `color', `grayscale', or `mono'.
`background' (what color is used for the background text)
Should be one of `light' or `dark'.
+`min-colors' (the minimum number of colors the frame should support)
+ Should be an integer, it is compared with the result of
+ `display-color-cells'.
+
+`supports' (only match frames that support the specified face attributes)
+ Should be a list of face attributes. See the documentation for
+ the function `display-supports-face-attributes-p' for more
+ information on exactly how testing is done.
+
Read the section about customization in the Emacs Lisp manual for more
information."
- `(custom-declare-face (quote ,face) ,spec ,doc ,@args))
+ ;; It is better not to use backquote in this file,
+ ;; because that makes a bootstrapping problem
+ ;; if you need to recompile all the Lisp files using interpreted code.
+ (nconc (list 'custom-declare-face (list 'quote face) spec doc) args))
;;; The `defgroup' Macro.
+(defun custom-current-group ()
+ (cdr (assoc load-file-name custom-current-group-alist)))
+
(defun custom-declare-group (symbol members doc &rest args)
"Like `defgroup', but SYMBOL is evaluated as a normal argument."
- (while members
+ (while members
(apply 'custom-add-to-group symbol (car members))
(setq members (cdr members)))
- (put symbol 'custom-group (nconc members (get symbol 'custom-group)))
(when doc
- (put symbol 'group-documentation doc))
- (while args
+ ;; This text doesn't get into DOC.
+ (put symbol 'group-documentation (purecopy doc)))
+ (while args
(let ((arg (car args)))
(setq args (cdr args))
(unless (symbolp arg)
(t
(custom-handle-keyword symbol keyword value
'custom-group))))))
+ ;; Record the group on the `current' list.
+ (let ((elt (assoc load-file-name custom-current-group-alist)))
+ (if elt (setcdr elt symbol)
+ (push (cons load-file-name symbol) custom-current-group-alist)))
(run-hooks 'custom-define-hook)
symbol)
Third arg DOC is the group documentation.
MEMBERS should be an alist of the form ((NAME WIDGET)...) where
-NAME is a symbol and WIDGET is a widget is a widget for editing that
-symbol. Useful widgets are `custom-variable' for editing variables,
+NAME is a symbol and WIDGET is a widget for editing that symbol.
+Useful widgets are `custom-variable' for editing variables,
`custom-face' for edit faces, and `custom-group' for editing groups.
The remaining arguments should have the form
- [KEYWORD VALUE]...
+ [KEYWORD VALUE]...
-The following KEYWORD's are defined:
+The following KEYWORDs are defined:
-:group VALUE should be a customization group.
- Add SYMBOL to that group.
+:group VALUE should be a customization group.
+ Add SYMBOL to that group.
+
+:version VALUE should be a string specifying that the group was introduced
+ in Emacs version VERSION.
Read the section about customization in the Emacs Lisp manual for more
information."
- `(custom-declare-group (quote ,symbol) ,members ,doc ,@args))
+ ;; It is better not to use backquote in this file,
+ ;; because that makes a bootstrapping problem
+ ;; if you need to recompile all the Lisp files using interpreted code.
+ (nconc (list 'custom-declare-group (list 'quote symbol) members doc) args))
(defun custom-add-to-group (group option widget)
"To existing GROUP add a new OPTION of type WIDGET.
-If there already is an entry for that option, overwrite it."
- (let* ((members (get group 'custom-group))
- (old (assq option members)))
- (if old
- (setcar (cdr old) widget)
- (put group 'custom-group (nconc members (list (list option widget)))))))
+If there already is an entry for OPTION and WIDGET, nothing is done."
+ (let ((members (get group 'custom-group))
+ (entry (list option widget)))
+ (unless (member entry members)
+ (put group 'custom-group (nconc members (list entry))))))
+
+(defun custom-group-of-mode (mode)
+ "Return the custom group corresponding to the major or minor MODE.
+If no such group is found, return nil."
+ (or (get mode 'custom-mode-group)
+ (if (or (get mode 'custom-group)
+ (and (string-match "-mode\\'" (symbol-name mode))
+ (get (setq mode (intern (substring (symbol-name mode)
+ 0 (match-beginning 0))))
+ 'custom-group)))
+ mode)))
;;; Properties.
(defun custom-handle-all-keywords (symbol args type)
"For customization option SYMBOL, handle keyword arguments ARGS.
Third argument TYPE is the custom option type."
- (while args
+ (unless (memq :group args)
+ (custom-add-to-group (custom-current-group) symbol type))
+ (while args
(let ((arg (car args)))
(setq args (cdr args))
(unless (symbolp arg)
(unless args
(error "Keyword %s is missing an argument" keyword))
(setq args (cdr args))
- (custom-handle-keyword symbol keyword value type)))))
+ (custom-handle-keyword symbol keyword value type)))))
(defun custom-handle-keyword (symbol keyword value type)
"For customization option SYMBOL, handle KEYWORD with VALUE.
Fourth argument TYPE is the custom option type."
+ (if purify-flag
+ (setq value (purecopy value)))
(cond ((eq keyword :group)
(custom-add-to-group value symbol type))
+ ((eq keyword :version)
+ (custom-add-version symbol value))
((eq keyword :link)
(custom-add-link symbol value))
((eq keyword :load)
(custom-add-load symbol value))
((eq keyword :tag)
(put symbol 'custom-tag value))
+ ((eq keyword :set-after)
+ (custom-add-dependencies symbol value))
(t
- (error "Unknown keyword %s" symbol))))
+ (error "Unknown keyword %s" keyword))))
+
+(defun custom-add-dependencies (symbol value)
+ "To the custom option SYMBOL, add dependencies specified by VALUE.
+VALUE should be a list of symbols. For each symbol in that list,
+this specifies that SYMBOL should be set after the specified symbol, if
+both appear in constructs like `custom-set-variables'."
+ (unless (listp value)
+ (error "Invalid custom dependency `%s'" value))
+ (let* ((deps (get symbol 'custom-dependencies))
+ (new-deps deps))
+ (while value
+ (let ((dep (car value)))
+ (unless (symbolp dep)
+ (error "Invalid custom dependency `%s'" dep))
+ (unless (memq dep new-deps)
+ (setq new-deps (cons dep new-deps)))
+ (setq value (cdr value))))
+ (unless (eq deps new-deps)
+ (put symbol 'custom-dependencies new-deps))))
(defun custom-add-option (symbol option)
"To the variable SYMBOL add OPTION.
"To the custom option SYMBOL add the link WIDGET."
(let ((links (get symbol 'custom-links)))
(unless (member widget links)
- (put symbol 'custom-links (cons widget links)))))
+ (put symbol 'custom-links (cons (purecopy widget) links)))))
+
+(defun custom-add-version (symbol version)
+ "To the custom option SYMBOL add the version VERSION."
+ (put symbol 'custom-version (purecopy version)))
(defun custom-add-load (symbol load)
"To the custom option SYMBOL add the dependency LOAD.
LOAD should be either a library file name, or a feature name."
(let ((loads (get symbol 'custom-loads)))
(unless (member load loads)
- (put symbol 'custom-loads (cons load loads)))))
+ (put symbol 'custom-loads (cons (purecopy load) loads)))))
+
+(defun custom-autoload (symbol load)
+ "Mark SYMBOL as autoloaded custom variable and add dependency LOAD."
+ (put symbol 'custom-autoload t)
+ (custom-add-load symbol load))
+
+;; This test is also in the C code of `user-variable-p'.
+(defun custom-variable-p (variable)
+ "Return non-nil if VARIABLE is a custom variable."
+ (or (get variable 'standard-value)
+ (get variable 'custom-autoload)))
+
+;;; Loading files needed to customize a symbol.
+;;; This is in custom.el because menu-bar.el needs it for toggle cmds.
+
+(defvar custom-load-recursion nil
+ "Hack to avoid recursive dependencies.")
+
+(defun custom-load-symbol (symbol)
+ "Load all dependencies for SYMBOL."
+ (unless custom-load-recursion
+ (let ((custom-load-recursion t))
+ ;; Load these files if not already done,
+ ;; to make sure we know all the dependencies of SYMBOL.
+ (condition-case nil
+ (require 'cus-load)
+ (error nil))
+ (condition-case nil
+ (require 'cus-start)
+ (error nil))
+ (dolist (load (get symbol 'custom-loads))
+ (cond ((symbolp load) (condition-case nil (require load) (error nil)))
+ ;; This is subsumed by the test below, but it's much faster.
+ ((assoc load load-history))
+ ;; This was just (assoc (locate-library load) load-history)
+ ;; but has been optimized not to load locate-library
+ ;; if not necessary.
+ ((let ((regexp (concat "\\(\\`\\|/\\)" (regexp-quote load)
+ "\\(\\'\\|\\.\\)"))
+ (found nil))
+ (dolist (loaded load-history)
+ (and (stringp (car loaded))
+ (string-match regexp (car loaded))
+ (setq found t)))
+ found))
+ ;; Without this, we would load cus-edit recursively.
+ ;; We are still loading it when we call this,
+ ;; and it is not in load-history yet.
+ ((equal load "cus-edit"))
+ (t (condition-case nil (load load) (error nil))))))))
+
+(defvar custom-known-themes '(user standard)
+ "Themes that have been define with `deftheme'.
+The default value is the list (user standard). The theme `standard'
+contains the Emacs standard settings from the original Lisp files. The
+theme `user' contains all the the settings the user customized and saved.
+Additional themes declared with the `deftheme' macro will be added to
+the front of this list.")
+
+(defun custom-declare-theme (theme feature &optional doc &rest args)
+ "Like `deftheme', but THEME is evaluated as a normal argument.
+FEATURE is the feature this theme provides. This symbol is created
+from THEME by `custom-make-theme-feature'."
+ (add-to-list 'custom-known-themes theme)
+ (put theme 'theme-feature feature)
+ (when doc
+ (put theme 'theme-documentation doc))
+ (while args
+ (let ((arg (car args)))
+ (setq args (cdr args))
+ (unless (symbolp arg)
+ (error "Junk in args %S" args))
+ (let ((keyword arg)
+ (value (car args)))
+ (unless args
+ (error "Keyword %s is missing an argument" keyword))
+ (setq args (cdr args))
+ (cond ((eq keyword :short-description)
+ (put theme 'theme-short-description value))
+ ((eq keyword :immediate)
+ (put theme 'theme-immediate value))
+ ((eq keyword :variable-set-string)
+ (put theme 'theme-variable-set-string value))
+ ((eq keyword :variable-reset-string)
+ (put theme 'theme-variable-reset-string value))
+ ((eq keyword :face-set-string)
+ (put theme 'theme-face-set-string value))
+ ((eq keyword :face-reset-string)
+ (put theme 'theme-face-reset-string value)))))))
+
+(defmacro deftheme (theme &optional doc &rest args)
+ "Declare custom theme THEME.
+The optional argument DOC is a doc string describing the theme.
+The remaining arguments should have the form
-;;; Initializing.
+ [KEYWORD VALUE]...
-(defun custom-set-variables (&rest args)
- "Initialize variables according to user preferences.
+The following KEYWORD's are defined:
+
+:short-description
+ VALUE is a short (one line) description of the theme. If not
+ given, DOC is used.
+:immediate
+ If VALUE is non-nil, variables specified in this theme are set
+ immediately when loading the theme.
+:variable-set-string
+ VALUE is a string used to indicate that a variable takes its
+ setting from this theme. It is passed to FORMAT with the name
+ of the theme as an additional argument. If not given, a
+ generic description is used.
+:variable-reset-string
+ VALUE is a string used in the case a variable has been forced
+ to its value in this theme. It is passed to FORMAT with the
+ name of the theme as an additional argument. If not given, a
+ generic description is used.
+:face-set-string
+ VALUE is a string used to indicate that a face takes its
+ setting from this theme. It is passed to FORMAT with the name
+ of the theme as an additional argument. If not given, a
+ generic description is used.
+:face-reset-string
+ VALUE is a string used in the case a face has been forced to
+ its value in this theme. It is passed to FORMAT with the name
+ of the theme as an additional argument. If not given, a
+ generic description is used.
+
+Any theme `foo' should be defined in a file called `foo-theme.el';
+see `custom-make-theme-feature' for more information."
+ (let ((feature (custom-make-theme-feature theme)))
+ ;; It is better not to use backquote in this file,
+ ;; because that makes a bootstrapping problem
+ ;; if you need to recompile all the Lisp files using interpreted code.
+ (nconc (list 'custom-declare-theme
+ (list 'quote theme)
+ (list 'quote feature)
+ doc) args)))
+
+(defun custom-make-theme-feature (theme)
+ "Given a symbol THEME, create a new symbol by appending \"-theme\".
+Store this symbol in the `theme-feature' property of THEME.
+Calling `provide-theme' to provide THEME actually puts `THEME-theme'
+into `features'.
+
+This allows for a file-name convention for autoloading themes:
+Every theme X has a property `provide-theme' whose value is \"X-theme\".
+\(require-theme X) then attempts to load the file `X-theme.el'."
+ (intern (concat (symbol-name theme) "-theme")))
+
+(defsubst custom-theme-p (theme)
+ "Non-nil when THEME has been defined."
+ (memq theme custom-known-themes))
+
+(defsubst custom-check-theme (theme)
+ "Check whether THEME is valid, and signal an error if it is not."
+ (unless (custom-theme-p theme)
+ (error "Unknown theme `%s'" theme)))
-The arguments should be a list where each entry has the form:
+;;; Initializing.
- (SYMBOL VALUE [NOW])
+(defun custom-push-theme (prop symbol theme mode value)
+ "Add (THEME MODE VALUE) to the list in property PROP of SYMBOL.
+If the first element in that list is already (THEME ...),
+discard it first.
+
+MODE can be either the symbol `set' or the symbol `reset'. If it is the
+symbol `set', then VALUE is the value to use. If it is the symbol
+`reset', then VALUE is the mode to query instead.
+
+In the following example for the variable `goto-address-url-face', the
+theme `subtle-hacker' uses the same value for the variable as the theme
+`gnome2':
+
+ \((standard set bold)
+ \(gnome2 set info-xref)
+ \(jonadab set underline)
+ \(subtle-hacker reset gnome2))
+
+
+If a value has been stored for themes A B and C, and a new value
+is to be stored for theme C, then the old value of C is discarded.
+If a new value is to be stored for theme B, however, the old value
+of B is not discarded because B is not the car of the list.
+
+For variables, list property PROP is `theme-value'.
+For faces, list property PROP is `theme-face'.
+This is used in `custom-do-theme-reset', for example.
+
+The list looks the same in any case; the examples shows a possible
+value of the `theme-face' property for the face `region':
+
+ \((gnome2 set ((t (:foreground \"cyan\" :background \"dark cyan\"))))
+ \(standard set ((((class color) (background dark))
+ \(:background \"blue\"))
+ \(t (:background \"gray\")))))
+
+This records values for the `standard' and the `gnome2' themes.
+The user has not customized the face; had he done that,
+the list would contain an entry for the `user' theme, too.
+See `custom-known-themes' for a list of known themes."
+ (let ((old (get symbol prop)))
+ (if (eq (car-safe (car-safe old)) theme)
+ (setq old (cdr old)))
+ (put symbol prop (cons (list theme mode value) old))))
+
+(defvar custom-local-buffer nil
+ "Non-nil, in a Customization buffer, means customize a specific buffer.
+If this variable is non-nil, it should be a buffer,
+and it means customize the local bindings of that buffer.
+This variable is a permanent local, and it normally has a local binding
+in every Customization buffer.")
+(put 'custom-local-buffer 'permanent-local t)
-The unevaluated VALUE is stored as the saved value for SYMBOL.
-If NOW is present and non-nil, VALUE is also evaluated and bound as
-the default value for the SYMBOL."
- (while args
+(defun custom-set-variables (&rest args)
+ "Install user customizations of variable values specified in ARGS.
+These settings are registered as theme `user'.
+The arguments should each be a list of the form:
+
+ (SYMBOL EXP [NOW [REQUEST [COMMENT]]])
+
+This stores EXP (without evaluating it) as the saved value for SYMBOL.
+If NOW is present and non-nil, then also evaluate EXP and set
+the default value for the SYMBOL to the value of EXP.
+
+REQUEST is a list of features we must require in order to
+handle SYMBOL properly.
+COMMENT is a comment string about SYMBOL."
+ (apply 'custom-theme-set-variables 'user args))
+
+(defun custom-reevaluate-setting (symbol)
+ "Reset the value of SYMBOL by re-evaluating its saved or default value.
+This is useful for variables that are defined before their default value
+can really be computed. E.g. dumped variables whose default depends on
+run-time information."
+ (funcall (or (get symbol 'custom-set) 'set-default)
+ symbol
+ (eval (car (or (get symbol 'saved-value) (get symbol 'standard-value))))))
+
+(defun custom-theme-set-variables (theme &rest args)
+ "Initialize variables for theme THEME according to settings in ARGS.
+Each of the arguments in ARGS should be a list of this form:
+
+ (SYMBOL EXP [NOW [REQUEST [COMMENT]]])
+
+This stores EXP (without evaluating it) as the saved value for SYMBOL.
+If NOW is present and non-nil, then also evaluate EXP and set
+the default value for the SYMBOL to the value of EXP.
+
+REQUEST is a list of features we must require in order to
+handle SYMBOL properly.
+COMMENT is a comment string about SYMBOL.
+
+Several properties of THEME and SYMBOL are used in the process:
+
+If THEME's property `theme-immediate' is non-nil, this is equivalent of
+providing the NOW argument to all symbols in the argument list:
+evaluate each EXP and set the corresponding SYMBOL. However,
+there's a difference in the handling of SYMBOL's property
+`force-value': if NOW is non-nil, SYMBOL's property `force-value' is set to
+the symbol `rogue', else if THEME's property `theme-immediate' is non-nil,
+SYMBOL's property `force-value' is set to the symbol `immediate'.
+
+EXP itself is saved unevaluated as SYMBOL property `saved-value' and
+in SYMBOL's list property `theme-value' \(using `custom-push-theme')."
+ (custom-check-theme theme)
+ (setq args
+ (sort args
+ (lambda (a1 a2)
+ (let* ((sym1 (car a1))
+ (sym2 (car a2))
+ (1-then-2 (memq sym1 (get sym2 'custom-dependencies)))
+ (2-then-1 (memq sym2 (get sym1 'custom-dependencies))))
+ (cond ((and 1-then-2 2-then-1)
+ (error "Circular custom dependency between `%s' and `%s'"
+ sym1 sym2))
+ (2-then-1 nil)
+ ;; Put symbols with :require last. The macro
+ ;; define-minor-mode generates a defcustom
+ ;; with a :require and a :set, where the
+ ;; setter function calls the mode function.
+ ;; Putting symbols with :require last ensures
+ ;; that the mode function will see other
+ ;; customized values rather than default
+ ;; values.
+ (t (nth 3 a2)))))))
+ (while args
(let ((entry (car args)))
(if (listp entry)
- (let* ((symbol (nth 0 entry))
+ (let* ((symbol (indirect-variable (nth 0 entry)))
(value (nth 1 entry))
(now (nth 2 entry))
(requests (nth 3 entry))
- (set (or (get symbol 'custom-set) 'set-default)))
- (put symbol 'saved-value (list value))
- (cond (now
- ;; Rogue variable, set it now.
- (put symbol 'force-value t)
- (funcall set symbol (eval value)))
- ((default-boundp symbol)
- ;; Something already set this, overwrite it.
- (funcall set symbol (eval value))))
+ (comment (nth 4 entry))
+ set)
(when requests
(put symbol 'custom-requests requests)
- (mapcar 'require requests))
- (setq args (cdr args)))
+ (mapc 'require requests))
+ (setq set (or (get symbol 'custom-set) 'custom-set-default))
+ (put symbol 'saved-value (list value))
+ (put symbol 'saved-variable-comment comment)
+ (custom-push-theme 'theme-value symbol theme 'set value)
+ ;; Allow for errors in the case where the setter has
+ ;; changed between versions, say, but let the user know.
+ (condition-case data
+ (cond (now
+ ;; Rogue variable, set it now.
+ (put symbol 'force-value t)
+ (funcall set symbol (eval value)))
+ ((default-boundp symbol)
+ ;; Something already set this, overwrite it.
+ (funcall set symbol (eval value))))
+ (error
+ (message "Error setting %s: %s" symbol data)))
+ (setq args (cdr args))
+ (and (or now (default-boundp symbol))
+ (put symbol 'variable-comment comment)))
;; Old format, a plist of SYMBOL VALUE pairs.
(message "Warning: old format `custom-set-variables'")
(ding)
(sit-for 2)
- (let ((symbol (nth 0 args))
+ (let ((symbol (indirect-variable (nth 0 args)))
(value (nth 1 args)))
- (put symbol 'saved-value (list value)))
+ (put symbol 'saved-value (list value))
+ (custom-push-theme 'theme-value symbol theme 'set value))
(setq args (cdr (cdr args)))))))
+(defun custom-set-default (variable value)
+ "Default :set function for a customizable variable.
+Normally, this sets the default value of VARIABLE to VALUE,
+but if `custom-local-buffer' is non-nil,
+this sets the local binding in that buffer instead."
+ (if custom-local-buffer
+ (with-current-buffer custom-local-buffer
+ (set variable value))
+ (set-default variable value)))
+
+(defun custom-set-minor-mode (variable value)
+ ":set function for minor mode variables.
+Normally, this sets the default value of VARIABLE to nil if VALUE
+is nil and to t otherwise,
+but if `custom-local-buffer' is non-nil,
+this sets the local binding in that buffer instead."
+ (if custom-local-buffer
+ (with-current-buffer custom-local-buffer
+ (funcall variable (if value 1 0)))
+ (funcall variable (if value 1 0))))
+
+(defun custom-quote (sexp)
+ "Quote SEXP iff it is not self quoting."
+ (if (or (memq sexp '(t nil))
+ (keywordp sexp)
+ (and (listp sexp)
+ (memq (car sexp) '(lambda)))
+ (stringp sexp)
+ (numberp sexp)
+ (vectorp sexp)
+;;; (and (fboundp 'characterp)
+;;; (characterp sexp))
+ )
+ sexp
+ (list 'quote sexp)))
+
+(defun customize-mark-to-save (symbol)
+ "Mark SYMBOL for later saving.
+
+If the default value of SYMBOL is different from the standard value,
+set the `saved-value' property to a list whose car evaluates to the
+default value. Otherwise, set it to nil.
+
+To actually save the value, call `custom-save-all'.
+
+Return non-nil iff the `saved-value' property actually changed."
+ (let* ((get (or (get symbol 'custom-get) 'default-value))
+ (value (funcall get symbol))
+ (saved (get symbol 'saved-value))
+ (standard (get symbol 'standard-value))
+ (comment (get symbol 'customized-variable-comment)))
+ ;; Save default value iff different from standard value.
+ (if (or (null standard)
+ (not (equal value (condition-case nil
+ (eval (car standard))
+ (error nil)))))
+ (put symbol 'saved-value (list (custom-quote value)))
+ (put symbol 'saved-value nil))
+ ;; Clear customized information (set, but not saved).
+ (put symbol 'customized-value nil)
+ ;; Save any comment that might have been set.
+ (when comment
+ (put symbol 'saved-variable-comment comment))
+ (not (equal saved (get symbol 'saved-value)))))
+
+(defun customize-mark-as-set (symbol)
+ "Mark current value of SYMBOL as being set from customize.
+
+If the default value of SYMBOL is different from the saved value if any,
+or else if it is different from the standard value, set the
+`customized-value' property to a list whose car evaluates to the
+default value. Otherwise, set it to nil.
+
+Return non-nil iff the `customized-value' property actually changed."
+ (let* ((get (or (get symbol 'custom-get) 'default-value))
+ (value (funcall get symbol))
+ (customized (get symbol 'customized-value))
+ (old (or (get symbol 'saved-value) (get symbol 'standard-value))))
+ ;; Mark default value as set iff different from old value.
+ (if (or (null old)
+ (not (equal value (condition-case nil
+ (eval (car old))
+ (error nil)))))
+ (put symbol 'customized-value (list (custom-quote value)))
+ (put symbol 'customized-value nil))
+ ;; Changed?
+ (not (equal customized (get symbol 'customized-value)))))
+
+;;; Theme Manipulation
+
+(defvar custom-loaded-themes nil
+ "Themes in the order they are loaded.")
+
+(defun custom-theme-loaded-p (theme)
+ "Return non-nil when THEME has been loaded."
+ (memq theme custom-loaded-themes))
+
+(defun provide-theme (theme)
+ "Indicate that this file provides THEME.
+Add THEME to `custom-loaded-themes' and `provide' whatever
+is stored in THEME's property `theme-feature'.
+
+Usually the theme-feature property contains a symbol created
+by `custom-make-theme-feature'."
+ (custom-check-theme theme)
+ (provide (get theme 'theme-feature))
+ (setq custom-loaded-themes (nconc (list theme) custom-loaded-themes)))
+
+(defun require-theme (theme)
+ "Try to load a theme by requiring its feature.
+THEME's feature is stored in THEME's `theme-feature' property.
+
+Usually the `theme-feature' property contains a symbol created
+by `custom-make-theme-feature'."
+ ;; Note we do no check for validity of the theme here.
+ ;; This allows to pull in themes by a file-name convention
+ (require (or (get theme 'theme-feature)
+ (custom-make-theme-feature theme))))
+
+(defun custom-remove-theme (spec-alist theme)
+ "Delete all elements from SPEC-ALIST whose car is THEME."
+ (let ((elt (assoc theme spec-alist)))
+ (while elt
+ (setq spec-alist (delete elt spec-alist)
+ elt (assoc theme spec-alist))))
+ spec-alist)
+
+(defun custom-do-theme-reset (theme)
+ "Undo all settings defined by THEME.
+
+A variable remains unchanged if its property `theme-value' does not
+contain a value for THEME. A face remains unchanged if its property
+`theme-face' does not contain a value for THEME. In either case, all
+settings for THEME are removed from the property and the variable or
+face is set to the `user' theme.
+
+See `custom-known-themes' for a list of known themes."
+ (let (spec-list)
+ (mapatoms (lambda (symbol)
+ ;; This works even if symbol is both a variable and a
+ ;; face.
+ (setq spec-list (get symbol 'theme-value))
+ (when spec-list
+ (put symbol 'theme-value (custom-remove-theme spec-list theme))
+ (custom-theme-reset-internal symbol 'user))
+ (setq spec-list (get symbol 'theme-face))
+ (when spec-list
+ (put symbol 'theme-face (custom-remove-theme spec-list theme))
+ (custom-theme-reset-internal-face symbol 'user))))))
+
+(defun custom-theme-load-themes (by-theme &rest body)
+ "Load the themes specified by BODY.
+Record them as required by theme BY-THEME. BODY is a sequence of either
+
+THEME
+ BY-THEME requires THEME
+\(reset THEME)
+ Undo all the settings made by THEME
+\(hidden THEME)
+ Require THEME but hide it from the user
+
+All the themes loaded for BY-THEME are recorded in BY-THEME's property
+`theme-loads-themes'. Any theme loaded with the hidden predicate will
+be given the property `theme-hidden' unless it has been loaded before.
+Whether a theme has been loaded before is determined by the function
+`custom-theme-loaded-p'."
+ (custom-check-theme by-theme)
+ (let ((theme)
+ (themes-loaded (get by-theme 'theme-loads-themes)))
+ (while theme
+ (setq theme (car body)
+ body (cdr body))
+ (cond ((and (consp theme) (eq (car theme) 'reset))
+ (custom-do-theme-reset (cadr theme)))
+ ((and (consp theme) (eq (car theme) 'hidden))
+ (require-theme (cadr theme))
+ (unless (custom-theme-loaded-p (cadr theme))
+ (put (cadr theme) 'theme-hidden t)))
+ (t
+ (require-theme theme)
+ (put theme 'theme-hidden nil)))
+ (setq themes-loaded (nconc (list theme) themes-loaded)))
+ (put by-theme 'theme-loads-themes themes-loaded)))
+
+(defun custom-load-themes (&rest body)
+ "Load themes for the USER theme as specified by BODY.
+
+See `custom-theme-load-themes' for more information on BODY."
+ (apply 'custom-theme-load-themes 'user body))
+
+; (defsubst copy-upto-last (elt list)
+; "Copy all the elements of the list upto the last occurence of elt"
+; ;; Is it faster to do more work in C than to do less in elisp?
+; (nreverse (cdr (member elt (reverse list)))))
+
+(defun custom-theme-value (theme theme-spec-list)
+ "Determine the value for THEME defined by THEME-SPEC-LIST.
+Returns a list with the original value if found; nil otherwise.
+
+THEME-SPEC-LIST is an alist with themes as its key. As new themes are
+installed, these are added to the front of THEME-SPEC-LIST.
+Each element has the form
+
+ \(THEME MODE VALUE)
+
+MODE is either the symbol `set' or the symbol `reset'. See
+`custom-push-theme' for more information on the format of
+THEME-SPEC-LIST."
+ ;; Note we do _NOT_ signal an error if the theme is unknown
+ ;; it might have gone away without the user knowing.
+ (let ((value (cdr (assoc theme theme-spec-list))))
+ (if value
+ (if (eq (car value) 'set)
+ (cdr value)
+ (custom-theme-value (cadr value) theme-spec-list)))))
+
+(defun custom-theme-variable-value (variable theme)
+ "Return (list value) indicating value of VARIABLE in THEME.
+If THEME does not define a value for VARIABLE, return nil. The value
+definitions per theme are stored in VARIABLE's property `theme-value'.
+The actual work is done by function `custom-theme-value', which see.
+See `custom-push-theme' for more information on how these definitions
+are stored."
+ (custom-theme-value theme (get variable 'theme-value)))
+
+(defun custom-theme-reset-internal (symbol to-theme)
+ "Reset SYMBOL to the value defined by TO-THEME.
+If SYMBOL is not defined in TO-THEME, reset SYMBOL to the standard
+value. See `custom-theme-variable-value'. The standard value is
+stored in SYMBOL's property `standard-value'."
+ (let ((value (custom-theme-variable-value symbol to-theme))
+ was-in-theme)
+ (setq was-in-theme value)
+ (setq value (or value (get symbol 'standard-value)))
+ (when value
+ (put symbol 'saved-value was-in-theme)
+ (if (or (get 'force-value symbol) (default-boundp symbol))
+ (funcall (or (get symbol 'custom-set) 'set-default) symbol
+ (eval (car value)))))
+ value))
+
+(defun custom-theme-reset-variables (theme &rest args)
+ "Reset the value of the variables to values previously defined.
+Associate this setting with THEME.
+
+ARGS is a list of lists of the form
+
+ (VARIABLE TO-THEME)
+
+This means reset VARIABLE to its value in TO-THEME."
+ (custom-check-theme theme)
+ (mapcar '(lambda (arg)
+ (apply 'custom-theme-reset-internal arg)
+ (custom-push-theme 'theme-value (car arg) theme 'reset (cadr arg)))
+ args))
+
+(defun custom-reset-variables (&rest args)
+ "Reset the value of the variables to values previously saved.
+This is the setting associated the `user' theme.
+
+ARGS is a list of lists of the form
+
+ (VARIABLE TO-THEME)
+
+This means reset VARIABLE to its value in TO-THEME."
+ (apply 'custom-theme-reset-variables 'user args))
+
;;; The End.
;; Process the defcustoms for variables loaded before this file.
(provide 'custom)
-;; custom.el ends here
+;; arch-tag: 041b6116-aabe-4f9a-902d-74092bc3dab2
+;;; custom.el ends here