lisp/cus-face.el

   1 ;;; cus-face.el --- customization support for faces
   2 ;;
   3 ;; Copyright (C) 1996-1997, 1999-2011 Free Software Foundation, Inc.
   4 ;;
   5 ;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
   6 ;; Keywords: help, faces
   7 ;; Package: emacs
   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 3 of the License, or
  14 ;; (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25 ;;
  26 ;; See `custom.el'.
  27
  28 ;;; Code:
  29
  30 (defalias 'custom-facep 'facep)
  31
  32 ;;; Declaring a face.
  33
  34 (defun custom-declare-face (face spec doc &rest args)
  35   "Like `defface', but FACE is evaluated as a normal argument."
  36   (unless (get face 'face-defface-spec)
  37     (when (fboundp 'facep)
  38       (unless (facep face)
  39         ;; If the user has already created the face, respect that.
  40         (let ((value (or (get face 'saved-face) spec))
  41               (have-window-system (memq initial-window-system '(x w32))))
  42           ;; Create global face.
  43           (make-empty-face face)
  44           ;; Create frame-local faces
  45           (dolist (frame (frame-list))
  46             (face-spec-set-2 face frame value)
  47             (when (memq (window-system frame) '(x w32 ns))
  48               (setq have-window-system t)))
  49           ;; When making a face after frames already exist
  50           (if have-window-system
  51               (make-face-x-resource-internal face)))))
  52     ;; Don't record SPEC until we see it causes no errors.
  53     (put face 'face-defface-spec (purecopy spec))
  54     (push (cons 'defface face) current-load-list)
  55     (when (and doc (null (face-documentation face)))
  56       (set-face-documentation face (purecopy doc)))
  57     (custom-handle-all-keywords face args 'custom-face)
  58     (run-hooks 'custom-define-hook))
  59   face)
  60
  61 ;;; Face attributes.
  62
  63 (defconst custom-face-attributes
  64   '((:family
  65      (string :tag "Font Family"
  66              :help-echo "Font family or fontset alias name."))
  67
  68     (:foundry
  69      (string :tag "Font Foundry"
  70              :help-echo "Font foundry name."))
  71
  72     (:width
  73      (choice :tag "Width"
  74              :help-echo "Font width."
  75              :value normal              ; default
  76              (const :tag "compressed" condensed)
  77              (const :tag "condensed" condensed)
  78              (const :tag "demiexpanded" semi-expanded)
  79              (const :tag "expanded" expanded)
  80              (const :tag "extracondensed" extra-condensed)
  81              (const :tag "extraexpanded" extra-expanded)
  82              (const :tag "medium" normal)
  83              (const :tag "narrow" condensed)
  84              (const :tag "normal" normal)
  85              (const :tag "regular" normal)
  86              (const :tag "semicondensed" semi-condensed)
  87              (const :tag "semiexpanded" semi-expanded)
  88              (const :tag "ultracondensed" ultra-condensed)
  89              (const :tag "ultraexpanded" ultra-expanded)
  90              (const :tag "wide" extra-expanded)))
  91
  92     (:height
  93      (choice :tag "Height"
  94              :help-echo "Face's font height."
  95              :value 1.0                 ; default
  96              (integer :tag "Height in 1/10 pt")
  97              (number :tag "Scale" 1.0)))
  98
  99     (:weight
 100      (choice :tag "Weight"
 101              :help-echo "Font weight."
 102              :value normal              ; default
 103              (const :tag "black" ultra-bold)
 104              (const :tag "bold" bold)
 105              (const :tag "book" semi-light)
 106              (const :tag "demibold" semi-bold)
 107              (const :tag "extralight" extra-light)
 108              (const :tag "extrabold" extra-bold)
 109              (const :tag "heavy" extra-bold)
 110              (const :tag "light" light)
 111              (const :tag "medium" normal)
 112              (const :tag "normal" normal)
 113              (const :tag "regular" normal)
 114              (const :tag "semibold" semi-bold)
 115              (const :tag "semilight" semi-light)
 116              (const :tag "ultralight" ultra-light)
 117              (const :tag "ultrabold" ultra-bold)
 118              (const :tag "thin" thin)))
 119
 120     (:slant
 121      (choice :tag "Slant"
 122              :help-echo "Font slant."
 123              :value normal              ; default
 124              (const :tag "italic" italic)
 125              (const :tag "oblique" oblique)
 126              (const :tag "normal" normal)
 127              (const :tag "roman" roman)))
 128
 129     (:underline
 130      (choice :tag "Underline"
 131              :help-echo "Control text underlining."
 132              (const :tag "Off" nil)
 133              (const :tag "On" t)
 134              (color :tag "Colored")))
 135
 136     (:overline
 137      (choice :tag "Overline"
 138              :help-echo "Control text overlining."
 139              (const :tag "Off" nil)
 140              (const :tag "On" t)
 141              (color :tag "Colored")))
 142
 143     (:strike-through
 144      (choice :tag "Strike-through"
 145              :help-echo "Control text strike-through."
 146              (const :tag "Off" nil)
 147              (const :tag "On" t)
 148              (color :tag "Colored")))
 149
 150     (:box
 151      ;; Fixme: this can probably be done better.
 152      (choice :tag "Box around text"
 153              :help-echo "Control box around text."
 154              (const :tag "Off" nil)
 155              (list :tag "Box"
 156                    :value (:line-width 2 :color "grey75" :style released-button)
 157                    (const :format "" :value :line-width)
 158                    (integer :tag "Width")
 159                    (const :format "" :value :color)
 160                    (choice :tag "Color" (const :tag "*" nil) color)
 161                    (const :format "" :value :style)
 162                    (choice :tag "Style"
 163                            (const :tag "Raised" released-button)
 164                            (const :tag "Sunken" pressed-button)
 165                            (const :tag "None" nil))))
 166      ;; filter to make value suitable for customize
 167      (lambda (real-value)
 168        (and real-value
 169             (let ((lwidth
 170                    (or (and (consp real-value)
 171                             (plist-get real-value :line-width))
 172                        (and (integerp real-value) real-value)
 173                        1))
 174                   (color
 175                    (or (and (consp real-value) (plist-get real-value :color))
 176                        (and (stringp real-value) real-value)
 177                        nil))
 178                   (style
 179                    (and (consp real-value) (plist-get real-value :style))))
 180               (list :line-width lwidth :color color :style style))))
 181      ;; filter to make customized-value suitable for storing
 182      (lambda (cus-value)
 183        (and cus-value
 184             (let ((lwidth (plist-get cus-value :line-width))
 185                   (color (plist-get cus-value :color))
 186                   (style (plist-get cus-value :style)))
 187               (cond ((and (null color) (null style))
 188                      lwidth)
 189                     ((and (null lwidth) (null style))
 190                      ;; actually can't happen, because LWIDTH is always an int
 191                      color)
 192                     (t
 193                      ;; Keep as a plist, but remove null entries
 194                      (nconc (and lwidth `(:line-width ,lwidth))
 195                             (and color  `(:color ,color))
 196                             (and style  `(:style ,style)))))))))
 197
 198     (:inverse-video
 199      (choice :tag "Inverse-video"
 200              :help-echo "Control whether text should be in inverse-video."
 201              (const :tag "Off" nil)
 202              (const :tag "On" t)))
 203
 204     (:foreground
 205      (color :tag "Foreground"
 206             :help-echo "Set foreground color (name or #RRGGBB hex spec)."))
 207
 208     (:background
 209      (color :tag "Background"
 210             :help-echo "Set background color (name or #RRGGBB hex spec)."))
 211
 212     (:stipple
 213      (choice :tag "Stipple"
 214              :help-echo "Background bit-mask"
 215              (const :tag "None" nil)
 216              (file :tag "File"
 217                    :help-echo "Name of bitmap file."
 218                    :must-match t)))
 219
 220     (:inherit
 221      (repeat :tag "Inherit"
 222              :help-echo "List of faces to inherit attributes from."
 223              (face :Tag "Face" default))
 224      ;; filter to make value suitable for customize
 225      (lambda (real-value)
 226        (cond ((or (null real-value) (eq real-value 'unspecified))
 227               nil)
 228              ((symbolp real-value)
 229               (list real-value))
 230              (t
 231               real-value)))
 232      ;; filter to make customized-value suitable for storing
 233      (lambda (cus-value)
 234        (if (and (consp cus-value) (null (cdr cus-value)))
 235            (car cus-value)
 236          cus-value))))
 237
 238   "Alist of face attributes.
 239
 240 The elements are of the form (KEY TYPE PRE-FILTER POST-FILTER),
 241 where KEY is the name of the attribute, TYPE is a widget type for
 242 editing the attribute, PRE-FILTER is a function to make the attribute's
 243 value suitable for the customization widget, and POST-FILTER is a
 244 function to make the customized value suitable for storing.  PRE-FILTER
 245 and POST-FILTER are optional.
 246
 247 The PRE-FILTER should take a single argument, the attribute value as
 248 stored, and should return a value for customization (using the
 249 customization type TYPE).
 250
 251 The POST-FILTER should also take a single argument, the value after
 252 being customized, and should return a value suitable for setting the
 253 given face attribute.")
 254
 255 (defun custom-face-attributes-get (face frame)
 256   "For FACE on FRAME, return an alternating list describing its attributes.
 257 The list has the form (KEYWORD VALUE KEYWORD VALUE...).
 258 Each keyword should be listed in `custom-face-attributes'.
 259
 260 If FRAME is nil, use the global defaults for FACE."
 261   (let ((attrs custom-face-attributes)
 262         plist)
 263     (while attrs
 264       (let* ((attribute (car (car attrs)))
 265              (value (face-attribute face attribute frame)))
 266         (setq attrs (cdr attrs))
 267         (unless (or (eq value 'unspecified)
 268                     (and (null value) (memq attribute '(:inherit))))
 269           (setq plist (cons attribute (cons value plist))))))
 270     plist))
 271
 272 ;;; Initializing.
 273
 274 (defun custom-set-faces (&rest args)
 275   "Initialize faces according to user preferences.
 276 This associates the settings with the `user' theme.
 277 The arguments should be a list where each entry has the form:
 278
 279   (FACE SPEC [NOW [COMMENT]])
 280
 281 SPEC is stored as the saved value for FACE, as well as the value for the
 282 `user' theme.  The `user' theme is one of the default themes known to Emacs.
 283 See `custom-known-themes' for more information on the known themes.
 284 See `custom-theme-set-faces' for more information on the interplay
 285 between themes and faces.
 286 See `defface' for the format of SPEC.
 287
 288 If NOW is present and non-nil, FACE is created now, according to SPEC.
 289 COMMENT is a string comment about FACE."
 290   (apply 'custom-theme-set-faces 'user args))
 291
 292 (defun custom-theme-set-faces (theme &rest args)
 293   "Initialize faces for theme THEME.
 294 The arguments should be a list where each entry has the form:
 295
 296   (FACE SPEC [NOW [COMMENT]])
 297
 298 SPEC is stored as the saved value for FACE, as well as the value for the
 299 `user' theme.  The `user' theme is one of the default themes known to Emacs.
 300 See `custom-known-themes' for more information on the known themes.
 301 See `custom-theme-set-faces' for more information on the interplay
 302 between themes and faces.
 303 See `defface' for the format of SPEC.
 304
 305 If NOW is present and non-nil, FACE is created now, according to SPEC.
 306 COMMENT is a string comment about FACE.
 307
 308 Several properties of THEME and FACE are used in the process:
 309
 310 If THEME property `theme-immediate' is non-nil, this is equivalent of
 311 providing the NOW argument to all faces in the argument list: FACE is
 312 created now.  The only difference is FACE property `force-face': if NOW
 313 is non-nil, FACE property `force-face' is set to the symbol `rogue', else
 314 if THEME property `theme-immediate' is non-nil, FACE property `force-face'
 315 is set to the symbol `immediate'.
 316
 317 SPEC itself is saved in FACE property `saved-face' and it is stored in
 318 FACE's list property `theme-face' \(using `custom-push-theme')."
 319   (custom-check-theme theme)
 320   (let ((immediate (get theme 'theme-immediate)))
 321     (dolist (entry args)
 322       (unless (listp entry)
 323         (error "Incompatible Custom theme spec"))
 324       (let ((face (car entry))
 325             (spec (nth 1 entry)))
 326         ;; If FACE is actually an alias, customize the face it
 327         ;; is aliased to.
 328         (if (get face 'face-alias)
 329             (setq face (get face 'face-alias)))
 330         (if custom--inhibit-theme-enable
 331             ;; Just update theme settings.
 332             (custom-push-theme 'theme-face face theme 'set spec)
 333           ;; Update theme settings and set the face spec.
 334           (let ((now (nth 2 entry))
 335                 (comment (nth 3 entry))
 336                 (oldspec (get face 'theme-face)))
 337             (when (not (and oldspec (eq 'user (caar oldspec))))
 338               (put face 'saved-face spec)
 339               (put face 'saved-face-comment comment))
 340             ;; Do this AFTER checking the `theme-face' property.
 341             (custom-push-theme 'theme-face face theme 'set spec)
 342             (when (or now immediate)
 343               (put face 'force-face (if now 'rogue 'immediate)))
 344             (when (or now immediate (facep face))
 345               (unless (facep face)
 346                 (make-empty-face face))
 347               (put face 'face-comment comment)
 348               (put face 'face-override-spec nil)
 349               (face-spec-set face spec t))))))))
 350
 351 ;; XEmacs compability function.  In XEmacs, when you reset a Custom
 352 ;; Theme, you have to specify the theme to reset it to.  We just apply
 353 ;; the next theme.
 354 (defun custom-theme-reset-faces (theme &rest args)
 355   "Reset the specs in THEME of some faces to their specs in other themes.
 356 Each of the arguments ARGS has this form:
 357
 358     (FACE IGNORED)
 359
 360 This means reset FACE.  The argument IGNORED is ignored."
 361   (custom-check-theme theme)
 362   (dolist (arg args)
 363     (custom-push-theme 'theme-face (car arg) theme 'reset)))
 364
 365 (defun custom-reset-faces (&rest args)
 366   "Reset the specs of some faces to their specs in specified themes.
 367 This creates settings in the `user' theme.
 368
 369 Each of the arguments ARGS has this form:
 370
 371     (FACE FROM-THEME)
 372
 373 This means reset FACE to its value in FROM-THEME."
 374   (apply 'custom-theme-reset-faces 'user args))
 375
 376 ;;; The End.
 377
 378 (provide 'cus-face)
 379
 380 ;;; cus-face.el ends here