lisp/faces.el

   1 ;;; faces.el --- Lisp interface to the c "face" structure
   2
   3 ;; Copyright (C) 1992, 1993 Free Software Foundation, Inc.
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs is free software; you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation; either version 2, or (at your option)
  10 ;; any later version.
  11
  12 ;; GNU Emacs is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  19 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21 ;;; Commentary:
  22
  23 ;; Mostly derived from Lucid.
  24
  25 ;;; Code:
  26
  27 \f
  28 ;;;; Functions for manipulating face vectors.
  29
  30 ;;; A face vector is a vector of the form:
  31 ;;;    [face ID FONT FOREGROUND BACKGROUND BACKGROUND-PIXMAP UNDERLINE]
  32
  33 ;;; Type checkers.
  34 (defsubst internal-facep (x)
  35   (and (vectorp x) (= (length x) 8) (eq (aref x 0) 'face)))
  36
  37 (defmacro internal-check-face (face)
  38   (` (while (not (internal-facep (, face)))
  39        (setq (, face) (signal 'wrong-type-argument (list 'internal-facep (, face)))))))
  40
  41 ;;; Accessors.
  42 (defsubst face-name (face)
  43   "Return the name of face FACE."
  44   (aref (internal-get-face face) 1))
  45
  46 (defsubst face-id (face)
  47   "Return the internal ID number of face FACE."
  48   (aref (internal-get-face face) 2))
  49
  50 (defsubst face-font (face &optional frame)
  51   "Return the font name of face FACE, or nil if it is unspecified.
  52 If the optional argument FRAME is given, report on face FACE in that frame.
  53 Otherwise report on the defaults for face FACE (for new frames)."
  54   (aref (internal-get-face face frame) 3))
  55
  56 (defsubst face-foreground (face &optional frame)
  57   "Return the foreground color name of face FACE, or nil if unspecified.
  58 If the optional argument FRAME is given, report on face FACE in that frame.
  59 Otherwise report on the defaults for face FACE (for new frames)."
  60   (aref (internal-get-face face frame) 4))
  61
  62 (defsubst face-background (face &optional frame)
  63   "Return the background color name of face FACE, or nil if unspecified.
  64 If the optional argument FRAME is given, report on face FACE in that frame.
  65 Otherwise report on the defaults for face FACE (for new frames)."
  66   (aref (internal-get-face face frame) 5))
  67
  68 (defsubst face-background-pixmap (face &optional frame)
  69  "Return the background pixmap name of face FACE, or nil if unspecified.
  70 If the optional argument FRAME is given, report on face FACE in that frame.
  71 Otherwise report on the defaults for face FACE (for new frames)."
  72  (aref (internal-get-face face frame) 6))
  73
  74 (defsubst face-underline-p (face &optional frame)
  75  "Return t if face FACE is underlined.
  76 If the optional argument FRAME is given, report on face FACE in that frame.
  77 Otherwise report on the defaults for face FACE (for new frames)."
  78  (aref (internal-get-face face frame) 7))
  79
  80 \f
  81 ;;; Mutators.
  82
  83 (defsubst set-face-font (face font &optional frame)
  84   "Change the font of face FACE to FONT (a string).
  85 If the optional FRAME argument is provided, change only
  86 in that frame; otherwise change each frame."
  87   (interactive (internal-face-interactive "font"))
  88   (internal-set-face-1 face 'font font 3 frame))
  89
  90 (defsubst set-face-foreground (face color &optional frame)
  91   "Change the foreground color of face FACE to COLOR (a string).
  92 If the optional FRAME argument is provided, change only
  93 in that frame; otherwise change each frame."
  94   (interactive (internal-face-interactive "foreground"))
  95   (internal-set-face-1 face 'foreground color 4 frame))
  96
  97 (defsubst set-face-background (face color &optional frame)
  98   "Change the background color of face FACE to COLOR (a string).
  99 If the optional FRAME argument is provided, change only
 100 in that frame; otherwise change each frame."
 101   (interactive (internal-face-interactive "background"))
 102   (internal-set-face-1 face 'background color 5 frame))
 103
 104 (defsubst set-face-background-pixmap (face name &optional frame)
 105   "Change the background pixmap of face FACE to PIXMAP.
 106 PIXMAP should be a string, the name of a file of pixmap data.
 107 The directories listed in the `x-bitmap-file-path' variable are searched.
 108
 109 Alternatively, PIXMAP may be a list of the form (WIDTH HEIGHT DATA)
 110 where WIDTH and HEIGHT are the size in pixels,
 111 and DATA is a string, containing the raw bits of the bitmap.
 112
 113 If the optional FRAME argument is provided, change only
 114 in that frame; otherwise change each frame."
 115   (interactive (internal-face-interactive "background-pixmap"))
 116   (internal-set-face-1 face 'background-pixmap name 6 frame))
 117
 118 (defsubst set-face-underline-p (face underline-p &optional frame)
 119   "Specify whether face FACE is underlined.  (Yes if UNDERLINE-P is non-nil.)
 120 If the optional FRAME argument is provided, change only
 121 in that frame; otherwise change each frame."
 122   (interactive (internal-face-interactive "underline-p" "underlined"))
 123   (internal-set-face-1 face 'underline underline-p 7 frame))
 124
 125 \f
 126 ;;;; Associating face names (symbols) with their face vectors.
 127
 128 (defvar global-face-data nil "do not use this")
 129
 130 (defun face-list ()
 131   "Returns a list of all defined face names."
 132   (mapcar 'car global-face-data))
 133
 134 (defun internal-find-face (name &optional frame)
 135   "Retrieve the face named NAME.  Return nil if there is no such face.
 136 If the optional argument FRAME is given, this gets the face NAME for
 137 that frame; otherwise, it uses the selected frame.
 138 If FRAME is the symbol t, then the global, non-frame face is returned.
 139 If NAME is already a face, it is simply returned."
 140   (if (and (eq frame t) (not (symbolp name)))
 141       (setq name (face-name name)))
 142   (if (symbolp name)
 143       (cdr (assq name
 144                  (if (eq frame t)
 145                      global-face-data
 146                    (frame-face-alist (or frame (selected-frame))))))
 147     (internal-check-face name)
 148     name))
 149
 150 (defun internal-get-face (name &optional frame)
 151   "Retrieve the face named NAME; error if there is none.
 152 If the optional argument FRAME is given, this gets the face NAME for
 153 that frame; otherwise, it uses the selected frame.
 154 If FRAME is the symbol t, then the global, non-frame face is returned.
 155 If NAME is already a face, it is simply returned."
 156   (or (internal-find-face name frame)
 157       (internal-check-face name)))
 158
 159
 160 (defun internal-set-face-1 (face name value index frame)
 161   (let ((inhibit-quit t))
 162     (if (null frame)
 163         (let ((frames (frame-list)))
 164           (while frames
 165             (internal-set-face-1 (face-name face) name value index (car frames))
 166             (setq frames (cdr frames)))
 167           (aset (internal-get-face (if (symbolp face) face (face-name face)) t)
 168                 index value)
 169           value)
 170       (or (eq frame t)
 171           (set-face-attribute-internal (face-id face) name value frame))
 172       (aset (internal-get-face face frame) index value))))
 173
 174
 175 (defun read-face-name (prompt)
 176   (let (face)
 177     (while (= (length face) 0)
 178       (setq face (completing-read prompt
 179                                   (mapcar '(lambda (x) (list (symbol-name x)))
 180                                           (face-list))
 181                                   nil t)))
 182     (intern face)))
 183
 184 (defun internal-face-interactive (what &optional bool)
 185   (let* ((fn (intern (concat "face-" what)))
 186          (prompt (concat "Set " what " of face"))
 187          (face (read-face-name (concat prompt ": ")))
 188          (default (if (fboundp fn)
 189                       (or (funcall fn face (selected-frame))
 190                           (funcall fn 'default (selected-frame)))))
 191          (value (if bool
 192                     (y-or-n-p (concat "Should face " (symbol-name face)
 193                                       " be " bool "? "))
 194                   (read-string (concat prompt " " (symbol-name face) " to: ")
 195                                default))))
 196     (list face (if (equal value "") nil value))))
 197
 198
 199
 200 (defun make-face (name)
 201   "Define a new FACE on all frames.
 202 You can modify the font, color, etc of this face with the set-face- functions.
 203 If the face already exists, it is unmodified."
 204   (interactive "sMake face: ")
 205   (or (internal-find-face name)
 206       (let ((face (make-vector 8 nil)))
 207         (aset face 0 'face)
 208         (aset face 1 name)
 209         (let* ((frames (frame-list))
 210                (inhibit-quit t)
 211                (id (internal-next-face-id)))
 212           (make-face-internal id)
 213           (aset face 2 id)
 214           (while frames
 215             (set-frame-face-alist (car frames)
 216                                   (cons (cons name (copy-sequence face))
 217                                         (frame-face-alist (car frames))))
 218             (setq frames (cdr frames)))
 219           (setq global-face-data (cons (cons name face) global-face-data)))
 220         ;; when making a face after frames already exist
 221         (if (eq window-system 'x)
 222             (make-face-x-resource-internal face))
 223         face)))
 224
 225 ;; Fill in a face by default based on X resources, for all existing frames.
 226 ;; This has to be done when a new face is made.
 227 (defun make-face-x-resource-internal (face &optional frame set-anyway)
 228   (cond ((null frame)
 229          (let ((frames (frame-list)))
 230            (while frames
 231              (make-face-x-resource-internal (face-name face)
 232                                             (car frames) set-anyway)
 233              (setq frames (cdr frames)))))
 234         (t
 235          (setq face (internal-get-face (face-name face) frame))
 236          ;;
 237          ;; These are things like "attributeForeground" instead of simply
 238          ;; "foreground" because people tend to do things like "*foreground",
 239          ;; which would cause all faces to be fully qualified, making faces
 240          ;; inherit attributes in a non-useful way.  So we've made them slightly
 241          ;; less obvious to specify in order to make them work correctly in
 242          ;; more random environments.
 243          ;;
 244          ;; I think these should be called "face.faceForeground" instead of
 245          ;; "face.attributeForeground", but they're the way they are for
 246          ;; hysterical reasons.
 247          ;;
 248          (let* ((name (symbol-name (face-name face)))
 249                 (fn  (or (x-get-resource (concat name ".attributeFont")
 250                                          "Face.AttributeFont")
 251                          (and set-anyway (face-font face))))
 252                 (fg  (or (x-get-resource (concat name ".attributeForeground")
 253                                          "Face.AttributeForeground")
 254                          (and set-anyway (face-foreground face))))
 255                 (bg  (or (x-get-resource (concat name ".attributeBackground")
 256                                          "Face.AttributeBackground")
 257                          (and set-anyway (face-background face))))
 258 ;;              (bgp (or (x-get-resource (concat name ".attributeBackgroundPixmap")
 259 ;;                                       "Face.AttributeBackgroundPixmap")
 260 ;;                       (and set-anyway (face-background-pixmap face))))
 261                 (ulp (or (x-get-resource (concat name ".attributeUnderline")
 262                                          "Face.AttributeUnderline")
 263                          (and set-anyway (face-underline-p face))))
 264                 )
 265            (if fn
 266                (condition-case ()
 267                    (set-face-font face fn frame)
 268                  (error (message "font `%s' not found for face `%s'" fn name))))
 269            (if fg
 270                (condition-case ()
 271                    (set-face-foreground face fg frame)
 272                  (error (message "color `%s' not allocated for face `%s'" fg name))))
 273            (if bg
 274                (condition-case ()
 275                    (set-face-background face bg frame)
 276                  (error (message "color `%s' not allocated for face `%s'" bg name))))
 277 ;;         (if bgp
 278 ;;             (condition-case ()
 279 ;;                 (set-face-background-pixmap face bgp frame)
 280 ;;               (error (message "pixmap `%s' not found for face `%s'" bgp name))))
 281            (if (or ulp set-anyway)
 282                (set-face-underline-p face ulp frame))
 283            )))
 284   face)
 285
 286 (defun copy-face (old-face new-name &optional frame)
 287   "Define a face just like OLD-FACE, with name NEW-NAME.
 288 If NEW-NAME already exists as a face, it is modified to be like OLD-FACE.
 289 If the optional argument FRAME is given, this applies only to that frame.
 290 Otherwise it applies to each frame separately."
 291   (setq old-face (internal-get-face old-face frame))
 292   (let* ((inhibit-quit t)
 293          (new-face (or (internal-find-face new-name frame)
 294                        (make-face new-name))))
 295     (if (null frame)
 296         (let ((frames (frame-list)))
 297           (while frames
 298             (copy-face old-face new-name (car frames))
 299             (setq frames (cdr frames)))
 300           (copy-face old-face new-name t))
 301       (set-face-font new-face (face-font old-face frame) frame)
 302       (set-face-foreground new-face (face-foreground old-face frame) frame)
 303       (set-face-background new-face (face-background old-face frame) frame)
 304 ;;;      (set-face-background-pixmap
 305 ;;;       new-face (face-background-pixmap old-face frame) frame)
 306       (set-face-underline-p new-face (face-underline-p old-face frame)
 307                             frame))
 308     new-face))
 309
 310 (defun face-equal (face1 face2 &optional frame)
 311   "True if the faces FACE1 and FACE2 display in the same way."
 312   (setq face1 (internal-get-face face1 frame)
 313         face2 (internal-get-face face2 frame))
 314   (and (equal (face-foreground face1 frame) (face-foreground face2 frame))
 315        (equal (face-background face1 frame) (face-background face2 frame))
 316        (equal (face-font face1 frame) (face-font face2 frame))
 317        (equal (face-background-pixmap face1 frame)
 318               (face-background-pixmap face2 frame))))
 319
 320 (defun face-differs-from-default-p (face &optional frame)
 321   "True if face FACE displays differently from the default face, on FRAME.
 322 A face is considered to be ``the same'' as the default face if it is
 323 actually specified in the same way (equivalent fonts, etc) or if it is
 324 fully unspecified, and thus inherits the attributes of any face it
 325 is displayed on top of."
 326   (let ((default (internal-get-face 'default frame)))
 327     (setq face (internal-get-face face frame))
 328     (not (and (or (equal (face-foreground default frame)
 329                          (face-foreground face frame))
 330                   (null (face-foreground face frame)))
 331               (or (equal (face-background default frame)
 332                          (face-background face frame))
 333                   (null (face-background face frame)))
 334               (or (equal (face-font default frame) (face-font face frame))
 335                   (null (face-font face frame)))
 336 ;;;           (or (equal (face-background-pixmap default frame)
 337 ;;;                      (face-background-pixmap face frame))
 338 ;;;               (null (face-background-pixmap face frame)))
 339               (equal (face-underline-p default frame)
 340                      (face-underline-p face frame))
 341               ))))
 342
 343
 344 (defun invert-face (face &optional frame)
 345   "Swap the foreground and background colors of face FACE.
 346 If the face doesn't specify both foreground and background, then
 347 set its foreground and background to the default background and foreground."
 348   (interactive (list (read-face-name "Invert face: ")))
 349   (setq face (internal-get-face face frame))
 350   (let ((fg (face-foreground face frame))
 351         (bg (face-background face frame)))
 352     (if (or fg bg)
 353         (progn
 354           (set-face-foreground face bg frame)
 355           (set-face-background face fg frame))
 356       (set-face-foreground face (or (face-background 'default frame)
 357                                     (cdr (assq 'background-color (frame-parameters frame))))
 358                            frame)
 359       (set-face-background face (or (face-foreground 'default frame)
 360                                     (cdr (assq 'foreground-color (frame-parameters frame))))
 361                            frame)))
 362   face)
 363
 364
 365 (defun internal-try-face-font (face font &optional frame)
 366   "Like set-face-font, but returns nil on failure instead of an error."
 367   (condition-case ()
 368       (set-face-font face font frame)
 369     (error nil)))
 370 \f
 371 ;; Manipulating font names.
 372
 373 (defconst x-font-regexp nil)
 374 (defconst x-font-regexp-head nil)
 375 (defconst x-font-regexp-weight nil)
 376 (defconst x-font-regexp-slant nil)
 377
 378 ;;; Regexps matching font names in "Host Portable Character Representation."
 379 ;;;
 380 (let ((-                "[-?]")
 381       (foundry          "[^-]+")
 382       (family           "[^-]+")
 383       (weight           "\\(bold\\|demibold\\|medium\\)")               ; 1
 384 ;     (weight\?         "\\(\\*\\|bold\\|demibold\\|medium\\|\\)")      ; 1
 385       (weight\?         "\\([^-]*\\)")                                  ; 1
 386       (slant            "\\([ior]\\)")                                  ; 2
 387 ;     (slant\?          "\\([ior?*]?\\)")                               ; 2
 388       (slant\?          "\\([^-]?\\)")                                  ; 2
 389 ;     (swidth           "\\(\\*\\|normal\\|semicondensed\\|\\)")        ; 3
 390       (swidth           "\\([^-]*\\)")                                  ; 3
 391 ;     (adstyle          "\\(\\*\\|sans\\|\\)")                          ; 4
 392       (adstyle          "[^-]*")                                        ; 4
 393       (pixelsize        "[0-9]+")
 394       (pointsize        "[0-9][0-9]+")
 395       (resx             "[0-9][0-9]+")
 396       (resy             "[0-9][0-9]+")
 397       (spacing          "[cmp?*]")
 398       (avgwidth         "[0-9]+")
 399       (registry         "[^-]+")
 400       (encoding         "[^-]+")
 401       )
 402   (setq x-font-regexp
 403         (concat "\\`\\*?[-?*]"
 404                 foundry - family - weight\? - slant\? - swidth - adstyle -
 405                 pixelsize - pointsize - resx - resy - spacing - registry -
 406                 encoding "[-?*]\\*?\\'"
 407                 ))
 408   (setq x-font-regexp-head
 409         (concat "\\`[-?*]" foundry - family - weight\? - slant\?
 410                 "\\([-*?]\\|\\'\\)"))
 411   (setq x-font-regexp-slant (concat - slant -))
 412   (setq x-font-regexp-weight (concat - weight -))
 413   nil)
 414
 415 (defun x-frob-font-weight (font which)
 416   (if (or (string-match x-font-regexp font)
 417           (string-match x-font-regexp-head font)
 418           (string-match x-font-regexp-weight font))
 419       (concat (substring font 0 (match-beginning 1)) which
 420               (substring font (match-end 1)))
 421     nil))
 422
 423 (defun x-frob-font-slant (font which)
 424   (cond ((or (string-match x-font-regexp font)
 425              (string-match x-font-regexp-head font))
 426          (concat (substring font 0 (match-beginning 2)) which
 427                  (substring font (match-end 2))))
 428         ((string-match x-font-regexp-slant font)
 429          (concat (substring font 0 (match-beginning 1)) which
 430                  (substring font (match-end 1))))
 431         (t nil)))
 432
 433
 434 (defun x-make-font-bold (font)
 435   "Given an X font specification, this attempts to make a `bold' version
 436 of it.  If it fails, it returns nil."
 437   (x-frob-font-weight font "bold"))
 438
 439 (defun x-make-font-demibold (font)
 440   "Given an X font specification, this attempts to make a `demibold' version
 441 of it.  If it fails, it returns nil."
 442   (x-frob-font-weight font "demibold"))
 443
 444 (defun x-make-font-unbold (font)
 445   "Given an X font specification, this attempts to make a non-bold version
 446 of it.  If it fails, it returns nil."
 447   (x-frob-font-weight font "medium"))
 448
 449 (defun x-make-font-italic (font)
 450   "Given an X font specification, this attempts to make an `italic' version
 451 of it.  If it fails, it returns nil."
 452   (x-frob-font-slant font "i"))
 453
 454 (defun x-make-font-oblique (font) ; you say tomayto...
 455   "Given an X font specification, this attempts to make an `italic' version
 456 of it.  If it fails, it returns nil."
 457   (x-frob-font-slant font "o"))
 458
 459 (defun x-make-font-unitalic (font)
 460   "Given an X font specification, this attempts to make a non-italic version
 461 of it.  If it fails, it returns nil."
 462   (x-frob-font-slant font "r"))
 463
 464 \f
 465 ;;; non-X-specific interface
 466
 467 (defun make-face-bold (face &optional frame noerror)
 468   "Make the font of the given face be bold, if possible.
 469 If NOERROR is non-nil, return nil on failure."
 470   (interactive (list (read-face-name "Make which face bold: ")))
 471   (let ((ofont (face-font face frame))
 472         font f2)
 473     (if (null frame)
 474         (let ((frames (frame-list)))
 475           (while frames
 476             (make-face-bold face (car frames))
 477             (setq frames (cdr frames))))
 478       (setq face (internal-get-face face frame))
 479       (setq font (or (face-font face frame)
 480                      (face-font face t)
 481                      (face-font 'default frame)
 482                      (cdr (assq 'font (frame-parameters frame)))))
 483       (or (and (setq f2 (x-make-font-bold font))
 484                (internal-try-face-font face f2))
 485           (and (setq f2 (x-make-font-demibold font))
 486                (internal-try-face-font face f2))))
 487     (or (not (equal ofont (face-font face)))
 488         (and (not noerror)
 489              (error "No %s version of %S" face ofont)))))
 490
 491 (defun make-face-italic (face &optional frame noerror)
 492   "Make the font of the given face be italic, if possible.
 493 If NOERROR is non-nil, return nil on failure."
 494   (interactive (list (read-face-name "Make which face italic: ")))
 495   (let ((ofont (face-font face frame))
 496         font f2)
 497     (if (null frame)
 498         (let ((frames (frame-list)))
 499           (while frames
 500             (make-face-italic face (car frames))
 501             (setq frames (cdr frames))))
 502       (setq face (internal-get-face face frame))
 503       (setq font (or (face-font face frame)
 504                      (face-font face t)
 505                      (face-font 'default frame)
 506                      (cdr (assq 'font (frame-parameters frame)))))
 507       (or (and (setq f2 (x-make-font-italic font))
 508                (internal-try-face-font face f2))
 509           (and (setq f2 (x-make-font-oblique font))
 510                (internal-try-face-font face f2))))
 511     (or (not (equal ofont (face-font face)))
 512         (and (not noerror)
 513              (error "No %s version of %S" face ofont)))))
 514
 515 (defun make-face-bold-italic (face &optional frame noerror)
 516   "Make the font of the given face be bold and italic, if possible.
 517 If NOERROR is non-nil, return nil on failure."
 518   (interactive (list (read-face-name "Make which face bold-italic: ")))
 519   (let ((ofont (face-font face frame))
 520         font f2 f3)
 521     (if (null frame)
 522         (let ((frames (frame-list)))
 523           (while frames
 524             (make-face-bold-italic face (car frames))
 525             (setq frames (cdr frames))))
 526       (setq face (internal-get-face face frame))
 527       (setq font (or (face-font face frame)
 528                       (face-font face t)
 529                       (face-font 'default frame)
 530                       (cdr (assq 'font (frame-parameters frame)))))
 531       (or (and (setq f2 (x-make-font-italic font))
 532                (not (equal font f2))
 533                (setq f3 (x-make-font-bold f2))
 534                (not (equal f2 f3))
 535                (internal-try-face-font face f3))
 536           (and (setq f2 (x-make-font-oblique font))
 537                (not (equal font f2))
 538                (setq f3 (x-make-font-bold f2))
 539                (not (equal f2 f3))
 540                (internal-try-face-font face f3))
 541           (and (setq f2 (x-make-font-italic font))
 542                (not (equal font f2))
 543                (setq f3 (x-make-font-demibold f2))
 544                (not (equal f2 f3))
 545                (internal-try-face-font face f3))
 546           (and (setq f2 (x-make-font-oblique font))
 547                (not (equal font f2))
 548                (setq f3 (x-make-font-demibold f2))
 549                (not (equal f2 f3))
 550                (internal-try-face-font face f3))))
 551     (or (not (equal ofont (face-font face)))
 552         (and (not noerror)
 553              (error "No %s version of %S" face ofont)))))
 554
 555 (defun make-face-unbold (face &optional frame noerror)
 556   "Make the font of the given face be non-bold, if possible.
 557 If NOERROR is non-nil, return nil on failure."
 558   (interactive (list (read-face-name "Make which face non-bold: ")))
 559   (let ((ofont (face-font face frame))
 560         font font1)
 561     (if (null frame)
 562         (let ((frames (frame-list)))
 563           (while frames
 564             (make-face-unbold face (car frames))
 565             (setq frames (cdr frames))))
 566       (setq face (internal-get-face face frame))
 567       (setq font1 (or (face-font face frame)
 568                       (face-font face t)
 569                       (face-font 'default frame)
 570                       (cdr (assq 'font (frame-parameters frame)))))
 571       (setq font (x-make-font-unbold font1))
 572       (if font (internal-try-face-font face font)))
 573     (or (not (equal ofont (face-font face)))
 574         (and (not noerror)
 575              (error "No %s version of %S" face ofont)))))
 576
 577 (defun make-face-unitalic (face &optional frame noerror)
 578   "Make the font of the given face be non-italic, if possible.
 579 If NOERROR is non-nil, return nil on failure."
 580   (interactive (list (read-face-name "Make which face non-italic: ")))
 581   (let ((ofont (face-font face frame))
 582         font font1)
 583     (if (null frame)
 584         (let ((frames (frame-list)))
 585           (while frames
 586             (make-face-unitalic face (car frames))
 587             (setq frames (cdr frames))))
 588       (setq face (internal-get-face face frame))
 589       (setq font1 (or (face-font face frame)
 590                       (face-font face t)
 591                       (face-font 'default frame)
 592                       (cdr (assq 'font (frame-parameters frame)))))
 593       (setq font (x-make-font-unitalic font1))
 594       (if font (internal-try-face-font face font)))
 595     (or (not (equal ofont (face-font face)))
 596         (and (not noerror)
 597              (error "No %s version of %S" face ofont)))))
 598 \f
 599 ;;; Make the builtin faces; the C code knows these as faces 0, 1, and 2,
 600 ;;; respectively, so they must be the first three faces made.
 601
 602 (defun face-initialize ()
 603   (make-face 'default)
 604   (make-face 'modeline)
 605   (make-face 'highlight)
 606   ;;
 607   ;; These aren't really special in any way, but they're nice to have around.
 608   ;; The X-specific code is clever at them.
 609   ;;
 610   (make-face 'bold)
 611   (make-face 'italic)
 612   (make-face 'bold-italic)
 613   (make-face 'region)
 614   (make-face 'secondary-selection)
 615
 616   (setq region-face (face-id 'region))
 617
 618   ;; Set up the faces of all existing X Window frames.
 619   (let ((frames (frame-list)))
 620     (while frames
 621       (if (eq (framep (car frames)) 'x)
 622           (x-initialize-frame-faces (car frames)))
 623       (setq frames (cdr frames)))))
 624
 625 \f
 626 ;;; This really belongs in setting a frame's own font.
 627 ;;;     ;;
 628 ;;;     ;; No font specified in the resource database; try to cope.
 629 ;;;     ;;
 630 ;;;     (internal-try-face-font default "-*-courier-medium-r-*-*-*-120-*-*-*-*-iso8859-*"
 631 ;;;                          frame)
 632 ;;;     (internal-try-face-font default "-*-courier-*-r-*-*-*-120-*-*-*-*-iso8859-*"
 633 ;;;                          frame)
 634 ;;;     (internal-try-face-font default "-*-*-medium-r-*-*-*-120-*-*-m-*-iso8859-*" frame)
 635 ;;;     (internal-try-face-font default "-*-*-medium-r-*-*-*-120-*-*-c-*-iso8859-*" frame)
 636 ;;;     (internal-try-face-font default "-*-*-*-r-*-*-*-120-*-*-m-*-iso8859-*" frame)
 637 ;;;     (internal-try-face-font default "-*-*-*-r-*-*-*-120-*-*-c-*-iso8859-*" frame)
 638 ;;;     (internal-try-face-font default "-*-*-*-r-*-*-*-120-*-*-*-*-iso8859-*" frame)
 639
 640
 641 ;;; This is called from make-screen-initial-faces to make sure that the
 642 ;;; "default" and "modeline" faces for this screen have enough attributes
 643 ;;; specified for emacs to be able to display anything on it.  This had
 644 ;;; better not signal an error.
 645 ;;;
 646 (defun x-initialize-frame-faces (frame)
 647   (or (face-differs-from-default-p 'bold frame)
 648       (make-face-bold 'bold frame t)
 649       ;; if default font is bold, then make the `bold' face be unbold.
 650       (make-face-unbold 'bold frame t)
 651       ;; otherwise the luser specified one of the bogus font names
 652       (internal-x-complain-about-font 'bold frame)
 653       )
 654
 655   (or (face-differs-from-default-p 'italic frame)
 656       (make-face-italic 'italic frame t)
 657       (progn
 658         (make-face-bold 'italic frame t)
 659         (internal-x-complain-about-font 'italic frame))
 660       )
 661
 662   (or (face-differs-from-default-p 'bold-italic frame)
 663       (make-face-bold-italic 'bold-italic frame t)
 664       ;; if we couldn't get a bold-italic version, try just bold.
 665       (make-face-bold 'bold-italic frame t)
 666       ;; if we couldn't get bold or bold-italic, then that's probably because
 667       ;; the default font is bold, so make the `bold-italic' face be unbold.
 668       (and (make-face-unbold 'bold-italic frame t)
 669            (make-face-italic 'bold-italic frame t))
 670       ;; if that didn't work, try italic (can this ever happen? what the hell.)
 671       (progn
 672         (make-face-italic 'bold-italic frame t)
 673         ;; then bitch and moan.
 674         (internal-x-complain-about-font 'bold-italic frame))
 675       )
 676
 677   (or (face-differs-from-default-p 'highlight frame)
 678       (condition-case ()
 679           (condition-case ()
 680               (set-face-background 'highlight "darkseagreen2" frame)
 681             (error (set-face-background 'highlight "green" frame)))
 682 ;;;         (set-face-background-pixmap 'highlight "gray1" frame)
 683         (error (invert-face 'highlight frame))))
 684
 685   (or (face-differs-from-default-p 'region frame)
 686       (condition-case ()
 687           (set-face-background 'region "gray" frame)
 688         (error (invert-face 'region frame))))
 689
 690   (or (face-differs-from-default-p 'modeline frame)
 691       (invert-face 'modeline frame))
 692
 693   (or (face-differs-from-default-p 'secondary-selection frame)
 694       (condition-case ()
 695           (condition-case ()
 696               ;; some older X servers don't have this one.
 697               (set-face-background 'secondary-selection "paleturquoise"
 698                                    frame)
 699             (error
 700              (set-face-background 'secondary-selection "green" frame)))
 701 ;;;         (set-face-background-pixmap 'secondary-selection "gray1" frame)
 702         (error (invert-face 'secondary-selection frame))))
 703   )
 704
 705 (defun internal-x-complain-about-font (face frame)
 706 ;;; It's annoying to bother the user about this,
 707 ;;; since it happens under normal circumstances.
 708 ;;;  (message "No %s version of %S"
 709 ;;;        face
 710 ;;;        (or (face-font face frame)
 711 ;;;            (face-font face t)
 712 ;;;            (face-font 'default frame)
 713 ;;;            (cdr (assq 'font (frame-parameters frame)))))
 714 ;;;  (sit-for 1)
 715   )
 716 \f
 717 ;; Like x-create-frame but also set up the faces.
 718
 719 (defun x-create-frame-with-faces (&optional parameters)
 720   (if (null global-face-data)
 721       (x-create-frame parameters)
 722     (let* ((frame (x-create-frame parameters))
 723            (faces (copy-alist global-face-data))
 724            (rest faces))
 725       (set-frame-face-alist frame faces)
 726
 727       ;; Copy the vectors that represent the faces.
 728       ;; Also fill them in from X resources.
 729       (while rest
 730         (setcdr (car rest) (copy-sequence (cdr (car rest))))
 731         (make-face-x-resource-internal (cdr (car rest)) frame t)
 732         (setq rest (cdr rest)))
 733
 734       (x-initialize-frame-faces frame)
 735
 736       frame)))
 737
 738 ;; If we are already using x-window frames, initialize faces for them.
 739 (if (eq (framep (selected-frame)) 'x)
 740     (face-initialize))
 741
 742 (provide 'faces)
 743
 744 ;;; faces.el ends here