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emacs/lisp/cus-face.el
Po Lu 7e17749ada Fix a default value of the `:underline' face attribute 
* lisp/cus-face.el (custom-face-attributes): Add `:position' t
default value of "On" for underlines.
2022-01-29 14:05:49 +08:00

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;;; cus-face.el --- customization support for faces -*- lexical-binding: t; -*-
;;
;; Copyright (C) 1996-1997, 1999-2022 Free Software Foundation, Inc.
;;
;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
;; Keywords: help, faces
;; Package: emacs
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; See `custom.el'.
;;; Code:
;;; Declaring a face.
(defun custom-declare-face (face spec doc &rest args)
"Like `defface', but with FACE evaluated as a normal argument."
(when (and doc
(not (stringp doc)))
(error "Invalid (or missing) doc string %S" doc))
(unless (get face 'face-defface-spec)
(face-spec-set face (purecopy spec) 'face-defface-spec)
(push (cons 'defface face) current-load-list)
(when doc
(set-face-documentation face (purecopy doc)))
(custom-handle-all-keywords face args 'custom-face)
(run-hooks 'custom-define-hook))
face)
;;; Face attributes.
(defconst custom-face-attributes
`((:family
(string :tag "Font Family"
:help-echo "Font family or fontset alias name."))
(:foundry
(string :tag "Font Foundry"
:help-echo "Font foundry name."))
;; The width, weight, and slant should be in sync with font.c.
(:width
(choice :tag "Width"
:help-echo "Font width."
:value normal ; default
(const :tag "compressed" condensed)
(const :tag "condensed" condensed)
(const :tag "demiexpanded" semi-expanded)
(const :tag "expanded" expanded)
(const :tag "extracondensed" extra-condensed)
(const :tag "extra-condensed" extra-condensed)
(const :tag "extraexpanded" extra-expanded)
(const :tag "extra-expanded" extra-expanded)
(const :tag "narrow" condensed)
(const :tag "normal" normal)
(const :tag "medium" normal)
(const :tag "regular" normal)
(const :tag "semicondensed" semi-condensed)
(const :tag "demicondensed" semi-condensed)
(const :tag "semi-condensed" semi-condensed)
(const :tag "semiexpanded" semi-expanded)
(const :tag "ultracondensed" ultra-condensed)
(const :tag "ultra-condensed" ultra-condensed)
(const :tag "ultraexpanded" ultra-expanded)
(const :tag "ultra-expanded" ultra-expanded)
(const :tag "wide" extra-expanded)))
(:height
(choice :tag "Height"
:help-echo "Face's font height."
:value 1.0 ; default
(integer :tag "Height in 1/10 pt")
(number :tag "Scale" 1.0)))
(:weight
(choice :tag "Weight"
:help-echo "Font weight."
:value normal ; default
(const :tag "thin" thin)
(const :tag "ultralight" ultra-light)
(const :tag "ultra-light" ultra-light)
(const :tag "extralight" ultra-light)
(const :tag "extra-light" ultra-light)
(const :tag "light" light)
(const :tag "semilight" semi-light)
(const :tag "semi-light" semi-light)
(const :tag "demilight" semi-light)
(const :tag "normal" normal)
(const :tag "regular" regular)
(const :tag "book" normal)
(const :tag "medium" medium)
(const :tag "semibold" semi-bold)
(const :tag "semi-bold" semi-bold)
(const :tag "demibold" semi-bold)
(const :tag "demi-bold" semi-bold)
(const :tag "bold" bold)
(const :tag "extrabold" extra-bold)
(const :tag "extra-bold" extra-bold)
(const :tag "ultrabold" extra-bold)
(const :tag "ultra-bold" extra-bold)
(const :tag "heavy" heavy)
(const :tag "black" heavy)
(const :tag "ultra-heavy" ultra-heavy)
(const :tag "ultraheavy" ultra-heavy)))
(:slant
(choice :tag "Slant"
:help-echo "Font slant."
:value normal ; default
(const :tag "italic" italic)
(const :tag "oblique" oblique)
(const :tag "normal" normal)
(const :tag "roman" roman)))
(:underline
(choice :tag "Underline"
:help-echo "Control text underlining."
(const :tag "Off" nil)
(list :tag "On"
:value (:color foreground-color :style line :position nil)
(const :format "" :value :color)
(choice :tag "Color"
(const :tag "Foreground Color" foreground-color)
color)
(const :format "" :value :style)
(choice :tag "Style"
(const :tag "Line" line)
(const :tag "Wave" wave))
(const :format "" :value :position)
(choice :tag "Position"
(const :tag "At Default Position" nil)
(const :tag "At Bottom Of Text" t)
(integer :tag "Pixels Above Bottom Of Text"))))
;; filter to make value suitable for customize
,(lambda (real-value)
(and real-value
(let ((color
(or (and (consp real-value) (plist-get real-value :color))
(and (stringp real-value) real-value)
'foreground-color))
(style
(or (and (consp real-value) (plist-get real-value :style))
'line))
(position (and (consp real-value)
(plist-get real-value :style))))
(list :color color :style style :position position))))
;; filter to make customized-value suitable for storing
,(lambda (cus-value)
(and cus-value
(let ((color (plist-get cus-value :color))
(style (plist-get cus-value :style))
(position (plist-get cus-value :position)))
(cond ((and (eq style 'line) (not position))
;; Use simple value for default style
(if (eq color 'foreground-color) t color))
(t
`(:color ,color :style ,style :position ,position)))))))
(:overline
(choice :tag "Overline"
:help-echo "Control text overlining."
(const :tag "Off" nil)
(const :tag "On" t)
(color :tag "Colored")))
(:strike-through
(choice :tag "Strike-through"
:help-echo "Control text strike-through."
(const :tag "Off" nil)
(const :tag "On" t)
(color :tag "Colored")))
(:box
;; Fixme: this can probably be done better.
(choice :tag "Box around text"
:help-echo "Control box around text."
(const :tag "Off" nil)
(list :tag "Box"
:value (:line-width (2 . 2) :color "grey75" :style released-button)
(const :format "" :value :line-width)
(cons :tag "Width" :extra-offset 2
(integer :tag "Vertical")
(integer :tag "Horizontal"))
(const :format "" :value :color)
(choice :tag "Color" (const :tag "*" nil) color)
(const :format "" :value :style)
(choice :tag "Style"
(const :tag "Raised" released-button)
(const :tag "Sunken" pressed-button)
(const :tag "Flat" flat-button)
(const :tag "None" nil))))
;; filter to make value suitable for customize
,(lambda (real-value)
(and real-value
(let ((lwidth
(or (and (consp real-value)
(if (listp (cdr real-value))
(plist-get real-value :line-width)
real-value))
(and (integerp real-value) real-value)
'(1 . 1)))
(color
(or (and (consp real-value) (plist-get real-value :color))
(and (stringp real-value) real-value)
nil))
(style
(and (consp real-value) (plist-get real-value :style))))
(if (integerp lwidth)
(setq lwidth (cons (abs lwidth) lwidth)))
(list :line-width lwidth :color color :style style))))
;; filter to make customized-value suitable for storing
,(lambda (cus-value)
(and cus-value
(let ((lwidth (plist-get cus-value :line-width))
(color (plist-get cus-value :color))
(style (plist-get cus-value :style)))
(cond ((and (null color) (null style))
lwidth)
((and (null lwidth) (null style))
;; actually can't happen, because LWIDTH is always an int
color)
(t
;; Keep as a plist, but remove null entries
(nconc (and lwidth `(:line-width ,lwidth))
(and color `(:color ,color))
(and style `(:style ,style)))))))))
(:inverse-video
(choice :tag "Inverse-video"
:help-echo "Control whether text should be in inverse-video."
(const :tag "Off" nil)
(const :tag "On" t)))
(:foreground
(color :tag "Foreground"
:help-echo "Set foreground color (name or #RRGGBB hex spec)."))
(:distant-foreground
(color :tag "Distant Foreground"
:help-echo "Set distant foreground color (name or #RRGGBB hex spec)."))
(:background
(color :tag "Background"
:help-echo "Set background color (name or #RRGGBB hex spec)."))
(:stipple
(choice :tag "Stipple"
:help-echo "Background bit-mask"
(const :tag "None" nil)
(file :tag "File"
:help-echo "Name of bitmap file."
:must-match t)))
(:extend
(choice :tag "Extend"
:help-echo "Control whether attributes should be extended after EOL."
(const :tag "Off" nil)
(const :tag "On" t)))
(:inherit
(repeat :tag "Inherit"
:help-echo "List of faces to inherit attributes from."
(face :Tag "Face" default))
;; filter to make value suitable for customize
,(lambda (real-value)
(cond ((or (null real-value) (eq real-value 'unspecified))
nil)
((symbolp real-value)
(list real-value))
(t
real-value)))
;; filter to make customized-value suitable for storing
,(lambda (cus-value)
(if (and (consp cus-value) (null (cdr cus-value)))
(car cus-value)
cus-value))))
"Alist of face attributes.
The elements are of the form (KEY TYPE PRE-FILTER POST-FILTER),
where KEY is the name of the attribute, TYPE is a widget type for
editing the attribute, PRE-FILTER is a function to make the attribute's
value suitable for the customization widget, and POST-FILTER is a
function to make the customized value suitable for storing. PRE-FILTER
and POST-FILTER are optional.
The PRE-FILTER should take a single argument, the attribute value as
stored, and should return a value for customization (using the
customization type TYPE).
The POST-FILTER should also take a single argument, the value after
being customized, and should return a value suitable for setting the
given face attribute.")
(defun custom-face-attributes-get (face frame)
"For FACE on FRAME, return an alternating list describing its attributes.
The list has the form (KEYWORD VALUE KEYWORD VALUE...).
Each keyword should be listed in `custom-face-attributes'.
If FRAME is nil, use the global defaults for FACE."
(let ((attrs custom-face-attributes)
plist)
(while attrs
(let* ((attribute (car (car attrs)))
(value (face-attribute face attribute frame)))
(setq attrs (cdr attrs))
(unless (or (eq value 'unspecified)
(and (null value) (memq attribute '(:inherit))))
(setq plist (cons attribute (cons value plist))))))
plist))
;;; Initializing.
(defun custom-set-faces (&rest args)
"Apply a list of face specs for user customizations.
This works by calling `custom-theme-set-faces' for the `user'
theme, a special theme referring to settings made via Customize.
The arguments ARGS should be a list where each entry has the form:
(FACE SPEC [NOW [COMMENT]])
See the documentation of `custom-theme-set-faces' for details."
(apply #'custom-theme-set-faces 'user args))
(defun custom-theme-set-faces (theme &rest args)
"Apply a list of face specs associated with theme THEME.
THEME should be a theme name (a symbol). The special theme named
`user' refers to user settings applied via Customize.
The remaining ARGS should be a list where each entry is a list of
the form:
(FACE SPEC [NOW [COMMENT]])
FACE should be a face name (a symbol). If FACE is a face alias,
the setting refers to the parent face.
SPEC should be a face spec. For details, see `defface'.
NOW, if present and non-nil, forces the face settings to take
immediate effect in the Emacs display; in particular, FACE is
initialized as a face if it is not yet one. If NOW is omitted or
nil, the caller is responsible for making the settings take
effect later, by calling `custom-theme-recalc-face' or
`face-spec-recalc'.
COMMENT is a string comment about FACE.
This function works by calling `custom-push-theme' to record each
SPEC in each FACE's `theme-face' property, and in THEME's
`theme-settings' property. If FACE has not already been
customized, it also stores SPEC in the `saved-face' property.
If THEME has a non-nil `theme-immediate' property, this is
equivalent to providing the NOW argument to all faces in the
argument list."
(custom-check-theme theme)
(let ((immediate (get theme 'theme-immediate)))
(dolist (entry args)
(unless (listp entry)
(error "Incompatible Custom theme spec"))
(let ((face (car entry))
(spec (nth 1 entry)))
;; If FACE is actually an alias, customize the face it
;; is aliased to.
(if (get face 'face-alias)
(setq face (get face 'face-alias)))
(if (not (custom--should-apply-setting theme))
;; Just update theme settings.
(custom-push-theme 'theme-face face theme 'set spec)
;; Update theme settings and set the face spec.
(let ((now (nth 2 entry))
(comment (nth 3 entry))
(oldspec (get face 'theme-face)))
(when (not (and oldspec (eq 'user (caar oldspec))))
(put face 'saved-face spec)
(put face 'saved-face-comment comment))
(custom-push-theme 'theme-face face theme 'set spec)
(when (or now immediate)
(put face 'force-face (if now 'rogue 'immediate)))
(when (or now immediate (facep face))
(put face 'face-comment comment)
(face-spec-set face spec t))))))))
;; XEmacs compatibility function. In XEmacs, when you reset a Custom
;; Theme, you have to specify the theme to reset it to. We just apply
;; the next theme.
(defun custom-theme-reset-faces (theme &rest args)
"Reset the specs in THEME of some faces to their specs in other themes.
Each of the arguments ARGS has this form:
(FACE IGNORED)
This means reset FACE. The argument IGNORED is ignored."
(custom-check-theme theme)
(dolist (arg args)
(custom-push-theme 'theme-face (car arg) theme 'reset)))
(defun custom-reset-faces (&rest args)
"Reset the specs of some faces to their specs in specified themes.
This creates settings in the `user' theme.
Each of the arguments ARGS has this form:
(FACE FROM-THEME)
This means reset FACE to its value in FROM-THEME."
(apply #'custom-theme-reset-faces 'user args))
(define-obsolete-function-alias 'custom-facep #'facep "28.1")
(provide 'cus-face)
;;; cus-face.el ends here
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