code.delx.au - gnu-emacs/blob - lisp/cus-face.el

   1 ;;; cus-face.el --- customization support for faces
   2 ;;
   3 ;; Copyright (C) 1996, 1997, 1999, 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   5 ;;
   6 ;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
   7 ;; Keywords: help, faces
   8 ;; Package: emacs
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26 ;;
  27 ;; See `custom.el'.
  28
  29 ;;; Code:
  30
  31 (defalias 'custom-facep 'facep)
  32
  33 ;;; Declaring a face.
  34
  35 (defun custom-declare-face (face spec doc &rest args)
  36   "Like `defface', but FACE is evaluated as a normal argument."
  37   (unless (get face 'face-defface-spec)
  38     (when (fboundp 'facep)
  39       (unless (facep face)
  40         ;; If the user has already created the face, respect that.
  41         (let ((value (or (get face 'saved-face) spec))
  42               (have-window-system (memq initial-window-system '(x w32))))
  43           ;; Create global face.
  44           (make-empty-face face)
  45           ;; Create frame-local faces
  46           (dolist (frame (frame-list))
  47             (face-spec-set-2 face frame value)
  48             (when (memq (window-system frame) '(x w32 ns))
  49               (setq have-window-system t)))
  50           ;; When making a face after frames already exist
  51           (if have-window-system
  52               (make-face-x-resource-internal face)))))
  53     ;; Don't record SPEC until we see it causes no errors.
  54     (put face 'face-defface-spec (purecopy spec))
  55     (push (cons 'defface face) current-load-list)
  56     (when (and doc (null (face-documentation face)))
  57       (set-face-documentation face (purecopy doc)))
  58     (custom-handle-all-keywords face args 'custom-face)
  59     (run-hooks 'custom-define-hook))
  60   face)
  61
  62 ;;; Face attributes.
  63
  64 (defconst custom-face-attributes
  65   '((:family
  66      (string :tag "Font Family"
  67              :help-echo "Font family or fontset alias name."))
  68
  69     (:foundry
  70      (string :tag "Font Foundry"
  71              :help-echo "Font foundry name."))
  72
  73     (:width
  74      (choice :tag "Width"
  75              :help-echo "Font width."
  76              :value normal              ; default
  77              (const :tag "compressed" condensed)
  78              (const :tag "condensed" condensed)
  79              (const :tag "demiexpanded" semi-expanded)
  80              (const :tag "expanded" expanded)
  81              (const :tag "extracondensed" extra-condensed)
  82              (const :tag "extraexpanded" extra-expanded)
  83              (const :tag "medium" normal)
  84              (const :tag "narrow" condensed)
  85              (const :tag "normal" normal)
  86              (const :tag "regular" normal)
  87              (const :tag "semicondensed" semi-condensed)
  88              (const :tag "semiexpanded" semi-expanded)
  89              (const :tag "ultracondensed" ultra-condensed)
  90              (const :tag "ultraexpanded" ultra-expanded)
  91              (const :tag "wide" extra-expanded)))
  92
  93     (:height
  94      (choice :tag "Height"
  95              :help-echo "Face's font height."
  96              :value 1.0                 ; default
  97              (integer :tag "Height in 1/10 pt")
  98              (number :tag "Scale" 1.0)))
  99
 100     (:weight
 101      (choice :tag "Weight"
 102              :help-echo "Font weight."
 103              :value normal              ; default
 104              (const :tag "black" ultra-bold)
 105              (const :tag "bold" bold)
 106              (const :tag "book" semi-light)
 107              (const :tag "demibold" semi-bold)
 108              (const :tag "extralight" extra-light)
 109              (const :tag "extrabold" extra-bold)
 110              (const :tag "heavy" extra-bold)
 111              (const :tag "light" light)
 112              (const :tag "medium" normal)
 113              (const :tag "normal" normal)
 114              (const :tag "regular" normal)
 115              (const :tag "semibold" semi-bold)
 116              (const :tag "semilight" semi-light)
 117              (const :tag "ultralight" ultra-light)
 118              (const :tag "ultrabold" ultra-bold)
 119              (const :tag "thin" thin)))
 120
 121     (:slant
 122      (choice :tag "Slant"
 123              :help-echo "Font slant."
 124              :value normal              ; default
 125              (const :tag "italic" italic)
 126              (const :tag "oblique" oblique)
 127              (const :tag "normal" normal)
 128              (const :tag "roman" roman)))
 129
 130     (:underline
 131      (choice :tag "Underline"
 132              :help-echo "Control text underlining."
 133              (const :tag "Off" nil)
 134              (const :tag "On" t)
 135              (color :tag "Colored")))
 136
 137     (:overline
 138      (choice :tag "Overline"
 139              :help-echo "Control text overlining."
 140              (const :tag "Off" nil)
 141              (const :tag "On" t)
 142              (color :tag "Colored")))
 143
 144     (:strike-through
 145      (choice :tag "Strike-through"
 146              :help-echo "Control text strike-through."
 147              (const :tag "Off" nil)
 148              (const :tag "On" t)
 149              (color :tag "Colored")))
 150
 151     (:box
 152      ;; Fixme: this can probably be done better.
 153      (choice :tag "Box around text"
 154              :help-echo "Control box around text."
 155              (const :tag "Off" nil)
 156              (list :tag "Box"
 157                    :value (:line-width 2 :color "grey75" :style released-button)
 158                    (const :format "" :value :line-width)
 159                    (integer :tag "Width")
 160                    (const :format "" :value :color)
 161                    (choice :tag "Color" (const :tag "*" nil) color)
 162                    (const :format "" :value :style)
 163                    (choice :tag "Style"
 164                            (const :tag "Raised" released-button)
 165                            (const :tag "Sunken" pressed-button)
 166                            (const :tag "None" nil))))
 167      ;; filter to make value suitable for customize
 168      (lambda (real-value)
 169        (and real-value
 170             (let ((lwidth
 171                    (or (and (consp real-value)
 172                             (plist-get real-value :line-width))
 173                        (and (integerp real-value) real-value)
 174                        1))
 175                   (color
 176                    (or (and (consp real-value) (plist-get real-value :color))
 177                        (and (stringp real-value) real-value)
 178                        nil))
 179                   (style
 180                    (and (consp real-value) (plist-get real-value :style))))
 181               (list :line-width lwidth :color color :style style))))
 182      ;; filter to make customized-value suitable for storing
 183      (lambda (cus-value)
 184        (and cus-value
 185             (let ((lwidth (plist-get cus-value :line-width))
 186                   (color (plist-get cus-value :color))
 187                   (style (plist-get cus-value :style)))
 188               (cond ((and (null color) (null style))
 189                      lwidth)
 190                     ((and (null lwidth) (null style))
 191                      ;; actually can't happen, because LWIDTH is always an int
 192                      color)
 193                     (t
 194                      ;; Keep as a plist, but remove null entries
 195                      (nconc (and lwidth `(:line-width ,lwidth))
 196                             (and color  `(:color ,color))
 197                             (and style  `(:style ,style)))))))))
 198
 199     (:inverse-video
 200      (choice :tag "Inverse-video"
 201              :help-echo "Control whether text should be in inverse-video."
 202              (const :tag "Off" nil)
 203              (const :tag "On" t)))
 204
 205     (:foreground
 206      (color :tag "Foreground"
 207             :help-echo "Set foreground color (name or #RRGGBB hex spec)."))
 208
 209     (:background
 210      (color :tag "Background"
 211             :help-echo "Set background color (name or #RRGGBB hex spec)."))
 212
 213     (:stipple
 214      (choice :tag "Stipple"
 215              :help-echo "Background bit-mask"
 216              (const :tag "None" nil)
 217              (file :tag "File"
 218                    :help-echo "Name of bitmap file."
 219                    :must-match t)))
 220
 221     (:inherit
 222      (repeat :tag "Inherit"
 223              :help-echo "List of faces to inherit attributes from."
 224              (face :Tag "Face" default))
 225      ;; filter to make value suitable for customize
 226      (lambda (real-value)
 227        (cond ((or (null real-value) (eq real-value 'unspecified))
 228               nil)
 229              ((symbolp real-value)
 230               (list real-value))
 231              (t
 232               real-value)))
 233      ;; filter to make customized-value suitable for storing
 234      (lambda (cus-value)
 235        (if (and (consp cus-value) (null (cdr cus-value)))
 236            (car cus-value)
 237          cus-value))))
 238
 239   "Alist of face attributes.
 240
 241 The elements are of the form (KEY TYPE PRE-FILTER POST-FILTER),
 242 where KEY is the name of the attribute, TYPE is a widget type for
 243 editing the attribute, PRE-FILTER is a function to make the attribute's
 244 value suitable for the customization widget, and POST-FILTER is a
 245 function to make the customized value suitable for storing.  PRE-FILTER
 246 and POST-FILTER are optional.
 247
 248 The PRE-FILTER should take a single argument, the attribute value as
 249 stored, and should return a value for customization (using the
 250 customization type TYPE).
 251
 252 The POST-FILTER should also take a single argument, the value after
 253 being customized, and should return a value suitable for setting the
 254 given face attribute.")
 255
 256 (defun custom-face-attributes-get (face frame)
 257   "For FACE on FRAME, return an alternating list describing its attributes.
 258 The list has the form (KEYWORD VALUE KEYWORD VALUE...).
 259 Each keyword should be listed in `custom-face-attributes'.
 260
 261 If FRAME is nil, use the global defaults for FACE."
 262   (let ((attrs custom-face-attributes)
 263         plist)
 264     (while attrs
 265       (let* ((attribute (car (car attrs)))
 266              (value (face-attribute face attribute frame)))
 267         (setq attrs (cdr attrs))
 268         (unless (or (eq value 'unspecified)
 269                     (and (null value) (memq attribute '(:inherit))))
 270           (setq plist (cons attribute (cons value plist))))))
 271     plist))
 272
 273 ;;; Initializing.
 274
 275 (defun custom-set-faces (&rest args)
 276   "Initialize faces according to user preferences.
 277 This associates the settings with the `user' theme.
 278 The arguments should be a list where each entry has the form:
 279
 280   (FACE SPEC [NOW [COMMENT]])
 281
 282 SPEC is stored as the saved value for FACE, as well as the value for the
 283 `user' theme.  The `user' theme is one of the default themes known to Emacs.
 284 See `custom-known-themes' for more information on the known themes.
 285 See `custom-theme-set-faces' for more information on the interplay
 286 between themes and faces.
 287 See `defface' for the format of SPEC.
 288
 289 If NOW is present and non-nil, FACE is created now, according to SPEC.
 290 COMMENT is a string comment about FACE."
 291   (apply 'custom-theme-set-faces 'user args))
 292
 293 (defun custom-theme-set-faces (theme &rest args)
 294   "Initialize faces for theme THEME.
 295 The arguments should be a list where each entry has the form:
 296
 297   (FACE SPEC [NOW [COMMENT]])
 298
 299 SPEC is stored as the saved value for FACE, as well as the value for the
 300 `user' theme.  The `user' theme is one of the default themes known to Emacs.
 301 See `custom-known-themes' for more information on the known themes.
 302 See `custom-theme-set-faces' for more information on the interplay
 303 between themes and faces.
 304 See `defface' for the format of SPEC.
 305
 306 If NOW is present and non-nil, FACE is created now, according to SPEC.
 307 COMMENT is a string comment about FACE.
 308
 309 Several properties of THEME and FACE are used in the process:
 310
 311 If THEME property `theme-immediate' is non-nil, this is equivalent of
 312 providing the NOW argument to all faces in the argument list: FACE is
 313 created now.  The only difference is FACE property `force-face': if NOW
 314 is non-nil, FACE property `force-face' is set to the symbol `rogue', else
 315 if THEME property `theme-immediate' is non-nil, FACE property `force-face'
 316 is set to the symbol `immediate'.
 317
 318 SPEC itself is saved in FACE property `saved-face' and it is stored in
 319 FACE's list property `theme-face' \(using `custom-push-theme')."
 320   (custom-check-theme theme)
 321   (let ((immediate (get theme 'theme-immediate)))
 322     (dolist (entry args)
 323       (unless (listp entry)
 324         (error "Incompatible Custom theme spec"))
 325       (let ((face (car entry))
 326             (spec (nth 1 entry)))
 327         ;; If FACE is actually an alias, customize the face it
 328         ;; is aliased to.
 329         (if (get face 'face-alias)
 330             (setq face (get face 'face-alias)))
 331         (if custom--inhibit-theme-enable
 332             ;; Just update theme settings.
 333             (custom-push-theme 'theme-face face theme 'set spec)
 334           ;; Update theme settings and set the face spec.
 335           (let ((now (nth 2 entry))
 336                 (comment (nth 3 entry))
 337                 (oldspec (get face 'theme-face)))
 338             (when (not (and oldspec (eq 'user (caar oldspec))))
 339               (put face 'saved-face spec)
 340               (put face 'saved-face-comment comment))
 341             ;; Do this AFTER checking the `theme-face' property.
 342             (custom-push-theme 'theme-face face theme 'set spec)
 343             (when (or now immediate)
 344               (put face 'force-face (if now 'rogue 'immediate)))
 345             (when (or now immediate (facep face))
 346               (unless (facep face)
 347                 (make-empty-face face))
 348               (put face 'face-comment comment)
 349               (put face 'face-override-spec nil)
 350               (face-spec-set face spec t))))))))
 351
 352 ;; XEmacs compability function.  In XEmacs, when you reset a Custom
 353 ;; Theme, you have to specify the theme to reset it to.  We just apply
 354 ;; the next theme.
 355 (defun custom-theme-reset-faces (theme &rest args)
 356   "Reset the specs in THEME of some faces to their specs in other themes.
 357 Each of the arguments ARGS has this form:
 358
 359     (FACE IGNORED)
 360
 361 This means reset FACE.  The argument IGNORED is ignored."
 362   (custom-check-theme theme)
 363   (dolist (arg args)
 364     (custom-push-theme 'theme-face (car arg) theme 'reset)))
 365
 366 (defun custom-reset-faces (&rest args)
 367   "Reset the specs of some faces to their specs in specified themes.
 368 This creates settings in the `user' theme.
 369
 370 Each of the arguments ARGS has this form:
 371
 372     (FACE FROM-THEME)
 373
 374 This means reset FACE to its value in FROM-THEME."
 375   (apply 'custom-theme-reset-faces 'user args))
 376
 377 ;;; The End.
 378
 379 (provide 'cus-face)
 380
 381 ;; arch-tag: 9a5c4b63-0d27-4c92-a5af-f2c7ed764c2b
 382 ;;; cus-face.el ends here