lisp/international/fontset.el

   1 ;;; fontset.el --- Commands for handling fontset.
   2
   3 ;; Copyright (C) 1995, 1997 Electrotechnical Laboratory, JAPAN.
   4 ;; Licensed to the Free Software Foundation.
   5
   6 ;; Keywords: mule, multilingual, fontset
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Code:
  26
  27 ;; Set standard fontname specification of characters in the default
  28 ;; fontset to find an appropriate font for each charset.  This is used
  29 ;; to generate a font name for a fontset if the fontset doesn't
  30 ;; specify a font name for a specific character.  The specification
  31 ;; has the form (FAMILY . REGISTRY).  FAMILY may be nil, in which
  32 ;; case, the family name of default face is used.  If REGISTRY
  33 ;; contains a character `-', the string before that is embedded in
  34 ;; `CHARSET_REGISTRY' field, and the string after that is embedded in
  35 ;; `CHARSET_ENCODING' field.  If it does not contain `-', the whole
  36 ;; string is embedded in `CHARSET_REGISTRY' field, and a wild card
  37 ;; character `*' is embedded in `CHARSET_ENCODING' field.  The
  38 ;; REGISTRY for ASCII characters are predefined as "ISO8859-1".
  39
  40 (let ((l `((latin-iso8859-1 . (nil . "ISO8859-1"))
  41            (latin-iso8859-2 . (nil . "ISO8859-2"))
  42            (latin-iso8859-3 . (nil . "ISO8859-3"))
  43            (latin-iso8859-4 . (nil . "ISO8859-4"))
  44            (thai-tis620 . ("*" . "TIS620"))
  45            (greek-iso8859-7 . ("*" . "ISO8859-7"))
  46            (arabic-iso8859-6 . ("*" . "ISO8859-6"))
  47            (hebrew-iso8859-8 . ("*" . "ISO8859-8"))
  48            (katakana-jisx0201 . ("*" . "JISX0201"))
  49            (latin-jisx0201 . (nil . "JISX0201"))
  50            (cyrillic-iso8859-5 . ("*" . "ISO8859-5"))
  51            (latin-iso8859-9 . (nil . "ISO8859-9"))
  52            (japanese-jisx0208-1978 . ("*" . "JISX0208.1978"))
  53            (chinese-gb2312 . ("*" . "GB2312"))
  54            (japanese-jisx0208 . ("*" . "JISX0208.1983"))
  55            (korean-ksc5601 . ("*" . "KSC5601"))
  56            (japanese-jisx0212 . ("*" . "JISX0212"))
  57            (chinese-cns11643-1 . ("*" . "CNS11643.1992-1"))
  58            (chinese-cns11643-2 . ("*" . "CNS11643.1992-2"))
  59            (chinese-cns11643-3 . ("*" . "CNS11643.1992-3"))
  60            (chinese-cns11643-4 . ("*" . "CNS11643.1992-4"))
  61            (chinese-cns11643-5 . ("*" . "CNS11643.1992-5"))
  62            (chinese-cns11643-6 . ("*" . "CNS11643.1992-6"))
  63            (chinese-cns11643-7 . ("*" . "CNS11643.1992-7"))
  64            (chinese-big5-1 . ("*" . "Big5"))
  65            (chinese-big5-2 . ("*" . "Big5"))
  66            (chinese-sisheng . (nil . "sisheng_cwnn"))
  67            (vietnamese-viscii-lower . (nil . "VISCII1.1"))
  68            (vietnamese-viscii-upper . (nil . "VISCII1.1"))
  69            (arabic-digit . ("*" . "MuleArabic-0"))
  70            (arabic-1-column . ("*" . "MuleArabic-1"))
  71            (arabic-2-column . ("*" . "MuleArabic-2"))
  72            (ipa . (nil . "MuleIPA"))
  73            (ethiopic . ("*" . "Ethiopic-Unicode"))
  74            (ascii-right-to-left . (nil . "ISO8859-1"))
  75            (indian-is13194 . ("*" . "IS13194-Devanagari"))
  76            (indian-2-column . ("*" . "MuleIndian-2"))
  77            (indian-1-column . ("*" . "MuleIndian-1"))
  78            (lao . ("*" . "MuleLao-1"))
  79            (tibetan . ("proportional" . "MuleTibetan-2"))
  80            (tibetan-1-column . ("*" . "MuleTibetan-1"))
  81            (latin-iso8859-14 . (nil . "ISO8859-14"))
  82            (latin-iso8859-15 . (nil . "ISO8859-15"))
  83            (mule-unicode-0100-24ff . (nil . "ISO10646-1"))
  84            (mule-unicode-2500-33ff . (nil . "ISO10646-1"))
  85            (mule-unicode-e000-ffff . (nil . "ISO10646-1"))
  86            (japanese-jisx0213-1 . ("*" . "JISX0213"))
  87            (japanese-jisx0213-2 . ("*" . "JISX0213"))
  88            ))
  89       charset font-spec arg)
  90   (while l
  91     (setq charset (car (car l)) font-spec (cdr (car l)) l (cdr l))
  92     (or (string-match "-" (cdr font-spec))
  93         (setcdr font-spec (concat (cdr font-spec) "*")))
  94     (if (symbolp charset)
  95         (setq arg (make-char charset))
  96       (setq arg charset))
  97     (set-fontset-font "fontset-default" arg font-spec)))
  98
  99 ;; Set arguments in `font-encoding-alist' (which see).
 100 (defun set-font-encoding (pattern charset encoding)
 101   (let ((slot (assoc pattern font-encoding-alist)))
 102     (if slot
 103         (let ((place (assq charset (cdr slot))))
 104           (if place
 105               (setcdr place encoding)
 106             (setcdr slot (cons (cons charset encoding) (cdr slot)))))
 107       (setq font-encoding-alist
 108             (cons (list pattern (cons charset encoding)) font-encoding-alist)))
 109     ))
 110
 111 (set-font-encoding "ISO8859-1" 'ascii 0)
 112 (set-font-encoding "JISX0201" 'latin-jisx0201 0)
 113
 114 (define-ccl-program ccl-encode-unicode-font
 115   `(0
 116     (if (r0 == ,(charset-id 'ascii))
 117         ((r2 = r1)
 118          (r1 = 0))
 119       (if (r0 == ,(charset-id 'latin-iso8859-1))
 120           ((r2 = (r1 + 128))
 121            (r1 = 0))
 122         (if (r0 == ,(charset-id 'mule-unicode-0100-24ff))
 123             ((r1 *= 96)
 124              (r1 += r2)
 125              (r1 += ,(- #x100 (* 32 96) 32))
 126              (r1 >8= 0)
 127              (r2 = r7))
 128           (if (r0 == ,(charset-id 'mule-unicode-2500-33ff))
 129               ((r1 *= 96)
 130                (r1 += r2)
 131                (r1 += ,(- #x2500 (* 32 96) 32))
 132                (r1 >8= 0)
 133                (r2 = r7))
 134             (if (r0 == ,(charset-id 'mule-unicode-e000-ffff))
 135                 ((r1 *= 96)
 136                  (r1 += r2)
 137                  (r1 += ,(- #xe000 (* 32 96) 32))
 138                  (r1 >8= 0)
 139                  (r2 = r7)))))))))
 140
 141 (setq font-ccl-encoder-alist
 142       (cons '("ISO10646-1" . ccl-encode-unicode-font)
 143             font-ccl-encoder-alist))
 144
 145 ;; Setting for suppressing XLoadQueryFont on big fonts.
 146 (setq x-pixel-size-width-font-regexp
 147       "gb2312\\|jisx0208\\|ksc5601\\|cns11643\\|big5")
 148
 149 ;; These fonts require vertical centering.
 150 (setq vertical-centering-font-regexp
 151       "gb2312\\|jisx0208\\|jisx0212\\|ksc5601\\|cns11643\\|big5")
 152
 153 (defvar x-font-name-charset-alist
 154   '(("iso8859-1" ascii latin-iso8859-1)
 155     ("iso8859-2" ascii latin-iso8859-2)
 156     ("iso8859-3" ascii latin-iso8859-3)
 157     ("iso8859-4" ascii latin-iso8859-4)
 158     ("iso8859-5" ascii cyrillic-iso8859-5)
 159     ("iso8859-6" ascii arabic-iso8859-6)
 160     ("iso8859-7" ascii greek-iso8859-7)
 161     ("iso8859-8" ascii hebrew-iso8859-8)
 162     ("iso8859-14" ascii latin-iso8859-14)
 163     ("iso8859-15" ascii latin-iso8859-15)
 164     ("tis620" ascii thai-tis620)
 165     ("koi8" ascii cyrillic-iso8859-5)
 166     ("viscii" ascii vietnamese-viscii-upper vietnamese-viscii-lower)
 167     ("vscii" ascii vietnamese-viscii-upper vietnamese-viscii-lower)
 168     ("mulelao-1" ascii lao)
 169     ("iso10646-1" ascii latin-iso8859-1 mule-unicode-0100-24ff
 170      mule-unicode-2500-33ff mule-unicode-e000-ffff))
 171   "Alist of font names vs list of charsets the font can display.
 172
 173 When a font name which matches some element of this alist is given as
 174 `-fn' command line argument or is specified by X resource, a fontset
 175 which uses the specified font for the corresponding charsets are
 176 created and used for the initial frame.")
 177
 178 ;;; XLFD (X Logical Font Description) format handler.
 179
 180 ;; Define XLFD's field index numbers.           ; field name
 181 (defconst xlfd-regexp-foundry-subnum 0)         ; FOUNDRY
 182 (defconst xlfd-regexp-family-subnum 1)          ; FAMILY_NAME
 183 (defconst xlfd-regexp-weight-subnum 2)          ; WEIGHT_NAME
 184 (defconst xlfd-regexp-slant-subnum 3)           ; SLANT
 185 (defconst xlfd-regexp-swidth-subnum 4)          ; SETWIDTH_NAME
 186 (defconst xlfd-regexp-adstyle-subnum 5)         ; ADD_STYLE_NAME
 187 (defconst xlfd-regexp-pixelsize-subnum 6)       ; PIXEL_SIZE
 188 (defconst xlfd-regexp-pointsize-subnum 7)       ; POINT_SIZE
 189 (defconst xlfd-regexp-resx-subnum 8)            ; RESOLUTION_X
 190 (defconst xlfd-regexp-resy-subnum 9)            ; RESOLUTION_Y
 191 (defconst xlfd-regexp-spacing-subnum 10)        ; SPACING
 192 (defconst xlfd-regexp-avgwidth-subnum 11)       ; AVERAGE_WIDTH
 193 (defconst xlfd-regexp-registry-subnum 12)       ; CHARSET_REGISTRY
 194 (defconst xlfd-regexp-encoding-subnum 13)       ; CHARSET_ENCODING
 195
 196 ;; Regular expression matching against a fontname which conforms to
 197 ;; XLFD (X Logical Font Description).  All fields in XLFD should be
 198 ;; not be omitted (but can be a wild card) to be matched.
 199 (defconst xlfd-tight-regexp
 200   "^\
 201 -\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)\
 202 -\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)\
 203 -\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)$")
 204
 205 ;; List of field numbers of XLFD whose values are numeric.
 206 (defconst xlfd-regexp-numeric-subnums
 207   (list xlfd-regexp-pixelsize-subnum    ;6
 208         xlfd-regexp-pointsize-subnum    ;7
 209         xlfd-regexp-resx-subnum         ;8
 210         xlfd-regexp-resy-subnum         ;9
 211         xlfd-regexp-avgwidth-subnum     ;11
 212         ))
 213
 214 (defun x-decompose-font-name (pattern)
 215   "Decompose PATTERN into XLFD's fields and return vector of the fields.
 216 The length of the vector is 14.
 217
 218 If PATTERN doesn't conform to XLFD, try to get a full XLFD name from
 219 X server and use the information of the full name to decompose
 220 PATTERN.  If no full XLFD name is gotten, return nil."
 221   (let (xlfd-fields fontname)
 222     (if (string-match xlfd-tight-regexp pattern)
 223         (let ((i 0))
 224           (setq xlfd-fields (make-vector 14 nil))
 225           (while (< i 14)
 226             (aset xlfd-fields i (match-string (1+ i) pattern))
 227             (setq i (1+ i)))
 228           xlfd-fields)
 229       (setq fontname (condition-case nil
 230                          (x-resolve-font-name pattern)
 231                        (error)))
 232       (if (and fontname
 233                (string-match xlfd-tight-regexp fontname))
 234           ;; We get a full XLFD name.
 235           (let ((len (length pattern))
 236                 (i 0)
 237                 l)
 238             ;; Setup xlfd-fields by the full XLFD name.  Each element
 239             ;; should be a cons of matched index and matched string.
 240             (setq xlfd-fields (make-vector 14 nil))
 241             (while (< i 14)
 242               (aset xlfd-fields i
 243                     (cons (match-beginning (1+ i))
 244                           (match-string (1+ i) fontname)))
 245               (setq i (1+ i)))
 246
 247             ;; Replace wild cards in PATTERN by regexp codes.
 248             (setq i 0)
 249             (while (< i len)
 250               (let ((ch (aref pattern i)))
 251                 (if (= ch ??)
 252                     (setq pattern (concat (substring pattern 0 i)
 253                                           "\\(.\\)"
 254                                           (substring pattern (1+ i)))
 255                           len (+ len 4)
 256                           i (+ i 4))
 257                   (if (= ch ?*)
 258                       (setq pattern (concat (substring pattern 0 i)
 259                                             "\\(.*\\)"
 260                                             (substring pattern (1+ i)))
 261                             len (+ len 5)
 262                             i (+ i 5))
 263                     (setq i (1+ i))))))
 264
 265             ;; Set each element of xlfd-fields to proper strings.
 266             (if (string-match pattern fontname)
 267                 ;; The regular expression PATTERN matchs the full XLFD
 268                 ;; name.  Set elements that correspond to a wild card
 269                 ;; in PATTERN to "*", set the other elements to the
 270                 ;; exact strings in PATTERN.
 271                 (let ((l (cdr (cdr (match-data)))))
 272                   (setq i 0)
 273                   (while (< i 14)
 274                     (if (or (null l) (< (car (aref xlfd-fields i)) (car l)))
 275                         (progn
 276                           (aset xlfd-fields i (cdr (aref xlfd-fields i)))
 277                           (setq i (1+ i)))
 278                       (if (< (car (aref xlfd-fields i)) (car (cdr l)))
 279                           (progn
 280                             (aset xlfd-fields i "*")
 281                             (setq i (1+ i)))
 282                         (setq l (cdr (cdr l)))))))
 283               ;; Set each element of xlfd-fields to the exact string
 284               ;; in the corresonding fields in full XLFD name.
 285               (setq i 0)
 286               (while (< i 14)
 287                 (aset xlfd-fields i (cdr (aref xlfd-fields i)))
 288                 (setq i (1+ i))))
 289             xlfd-fields)))))
 290
 291 ;; Replace consecutive wild-cards (`*') in NAME to one.
 292 ;; Ex. (x-reduce-font-name "-*-*-*-iso8859-1") => "-*-iso8859-1"
 293 (defsubst x-reduce-font-name (name)
 294   (while (string-match "-\\*-\\(\\*-\\)+" name)
 295     (setq name (replace-match "-*-" t t name)))
 296   name)
 297
 298 (defun x-compose-font-name (fields &optional reduce)
 299   "Compose X's fontname from FIELDS.
 300 FIELDS is a vector of XLFD fields, the length 14.
 301 If a field is nil, wild-card letter `*' is embedded.
 302 Optional argument REDUCE is always ignored.  It exists just for
 303 backward compatibility."
 304   (concat "-" (mapconcat (lambda (x) (or x "*")) fields "-")))
 305
 306 (defun x-complement-fontset-spec (xlfd-fields fontlist)
 307   "Complement FONTLIST for charsets based on XLFD-FIELDS and return it.
 308 XLFD-FIELDS is a vector of XLFD (X Logical Font Description) fields.
 309 FONTLIST is an alist of charsets vs the corresponding font names.
 310
 311 The fonts are complemented as below.
 312
 313 If FONTLIST doesn't specify a font for ASCII charset, generate a font
 314 name for the charset from XLFD-FIELDS, and add that information to
 315 FONTLIST.
 316
 317 If a font specifid for ASCII supports the other charsets (see the
 318 variable `x-font-name-charset-alist'), add that information to FONTLIST."
 319   (let ((ascii-font (cdr (assq 'ascii fontlist))))
 320
 321     ;; If font for ASCII is not specified, add it.
 322     (unless ascii-font
 323       (aset xlfd-fields xlfd-regexp-registry-subnum "iso8859")
 324       (aset xlfd-fields xlfd-regexp-encoding-subnum "1")
 325       (setq ascii-font (x-compose-font-name xlfd-fields))
 326       (setq fontlist (cons (cons 'ascii ascii-font) fontlist)))
 327
 328     ;; If the font for ASCII also supports the other charsets, and
 329     ;; they are not specified in FONTLIST, add them.
 330     (let ((tail x-font-name-charset-alist)
 331           elt)
 332       (while tail
 333         (setq elt (car tail) tail (cdr tail))
 334         (if (string-match (car elt) ascii-font)
 335             (let ((charsets (cdr elt))
 336                   charset)
 337               (while charsets
 338                 (setq charset (car charsets) charsets (cdr charsets))
 339                 (or (assq charset fontlist)
 340                     (setq fontlist
 341                           (cons (cons charset ascii-font) fontlist))))))))
 342
 343     fontlist))
 344
 345 (defun fontset-name-p (fontset)
 346   "Return non-nil if FONTSET is valid as fontset name.
 347 A valid fontset name should conform to XLFD (X Logical Font Description)
 348 with \"fontset\" in `<CHARSET_REGISTRY> field."
 349   (and (string-match xlfd-tight-regexp fontset)
 350        (string= (match-string (1+ xlfd-regexp-registry-subnum) fontset)
 351                 "fontset")))
 352
 353 ;; Return a list to be appended to `x-fixed-font-alist' when
 354 ;; `mouse-set-font' is called.
 355 (defun generate-fontset-menu ()
 356   (let ((fontsets (fontset-list))
 357         fontset-name
 358         l)
 359     (while fontsets
 360       (setq fontset-name (car fontsets) fontsets (cdr fontsets))
 361       (setq l (cons (list (fontset-plain-name fontset-name) fontset-name) l)))
 362     (cons "Fontset"
 363           (sort l (function (lambda (x y) (string< (car x) (car y))))))))
 364
 365 (defun fontset-plain-name (fontset)
 366   "Return a plain and descriptive name of FONTSET."
 367   (if (not (setq fontset (query-fontset fontset)))
 368       (error "Invalid fontset: %s" fontset))
 369   (let ((xlfd-fields (x-decompose-font-name fontset)))
 370     (if xlfd-fields
 371         (let ((weight (aref xlfd-fields xlfd-regexp-weight-subnum))
 372               (slant  (aref xlfd-fields xlfd-regexp-slant-subnum))
 373               (swidth (aref xlfd-fields xlfd-regexp-swidth-subnum))
 374               (size   (aref xlfd-fields xlfd-regexp-pixelsize-subnum))
 375               (charset (aref xlfd-fields xlfd-regexp-registry-subnum))
 376               (nickname (aref xlfd-fields xlfd-regexp-encoding-subnum))
 377               name)
 378           (if (not (string= "fontset" charset))
 379               fontset
 380             (if (> (string-to-int size) 0)
 381                 (setq name (format "%s: %s-dot" nickname size))
 382               (setq name nickname))
 383             (cond ((string-match "^medium$" weight)
 384                    (setq name (concat name " " "medium")))
 385                   ((string-match "^bold$\\|^demibold$" weight)
 386                    (setq name (concat name " " weight))))
 387             (cond ((string-match "^i$" slant)
 388                    (setq name (concat name " " "italic")))
 389                   ((string-match "^o$" slant)
 390                    (setq name (concat name " " "slant")))
 391                   ((string-match "^ri$" slant)
 392                    (setq name (concat name " " "reverse italic")))
 393                   ((string-match "^ro$" slant)
 394                    (setq name (concat name " " "reverse slant"))))
 395             name))
 396       fontset)))
 397
 398 ;;;###autoload
 399 (defun create-fontset-from-fontset-spec (fontset-spec
 400                                          &optional style-variant noerror)
 401   "Create a fontset from fontset specification string FONTSET-SPEC.
 402 FONTSET-SPEC is a string of the format:
 403         FONTSET-NAME,CHARSET-NAME0:FONT-NAME0,CHARSET-NAME1:FONT-NAME1, ...
 404 Any number of SPACE, TAB, and NEWLINE can be put before and after commas.
 405
 406 Optional 2nd argument is ignored.  It exists just for backward
 407 compatibility.
 408
 409 If this function attempts to create already existing fontset, error is
 410 signaled unless the optional 3rd argument NOERROR is non-nil.
 411
 412 It returns a name of the created fontset."
 413   (if (not (string-match "^[^,]+" fontset-spec))
 414       (error "Invalid fontset spec: %s" fontset-spec))
 415   (setq fontset-spec (downcase fontset-spec))
 416   (let ((idx (match-end 0))
 417         (name (match-string 0 fontset-spec))
 418         xlfd-fields charset fontlist ascii-font)
 419     (if (query-fontset name)
 420         (or noerror
 421             (error "Fontset \"%s\" already exists" name))
 422       (setq xlfd-fields (x-decompose-font-name name))
 423       (or xlfd-fields
 424           (error "Fontset \"%s\" not conforming to XLFD" name))
 425
 426       ;; At first, extract pairs of charset and fontname from FONTSET-SPEC.
 427       (while (string-match "[, \t\n]*\\([^:]+\\):\\([^,]+\\)" fontset-spec idx)
 428         (setq idx (match-end 0))
 429         (setq charset (intern (match-string 1 fontset-spec)))
 430         (if (charsetp charset)
 431             (setq fontlist (cons (cons charset (match-string 2 fontset-spec))
 432                                  fontlist))))
 433
 434       ;; Complement FONTLIST.
 435       (setq fontlist (x-complement-fontset-spec xlfd-fields fontlist))
 436
 437       (new-fontset name fontlist)
 438
 439       ;; Define the short name alias.
 440       (if (and (string-match "fontset-.*$" name)
 441                (not (assoc name fontset-alias-alist)))
 442           (let ((alias (match-string 0 name)))
 443             (or (rassoc alias fontset-alias-alist)
 444                 (setq fontset-alias-alist
 445                       (cons (cons name alias) fontset-alias-alist)))))
 446
 447       ;; Define the ASCII font name alias.
 448       (setq ascii-font (cdr (assq 'ascii fontlist)))
 449       (or (rassoc ascii-font fontset-alias-alist)
 450           (setq fontset-alias-alist
 451                 (cons (cons name ascii-font)
 452                       fontset-alias-alist))))
 453
 454     name))
 455
 456 (defun create-fontset-from-ascii-font (font &optional resolved-font
 457                                             fontset-name)
 458   "Create a fontset from an ASCII font FONT.
 459
 460 Optional 1st arg RESOLVED-FONT is a resolved name of FONT.  If
 461 omitted, x-resolve-font-name is called to get the resolved name.  At
 462 this time, if FONT is not available, error is signaled.
 463
 464 Optional 2nd arg FONTSET-NAME is a string to be used in
 465 `<CHARSET_ENCODING>' fields of a new fontset name.  If it is omitted,
 466 an appropriate name is generated automatically.
 467
 468 It returns a name of the created fontset."
 469   (setq font (downcase font))
 470   (if resolved-font
 471       (setq resolved-font (downcase resolved-font))
 472     (setq resolved-font (downcase (x-resolve-font-name font))))
 473   (let ((xlfd (x-decompose-font-name font))
 474         (resolved-xlfd (x-decompose-font-name resolved-font))
 475         fontset fontset-spec)
 476     (aset xlfd xlfd-regexp-foundry-subnum nil)
 477     (aset xlfd xlfd-regexp-family-subnum nil)
 478     (aset xlfd xlfd-regexp-registry-subnum "fontset")
 479     (if fontset-name
 480         (setq fontset-name (downcase fontset-name))
 481       (setq fontset-name
 482             (format "%s_%s_%s"
 483                     (aref resolved-xlfd xlfd-regexp-registry-subnum)
 484                     (aref resolved-xlfd xlfd-regexp-encoding-subnum)
 485                     (aref resolved-xlfd xlfd-regexp-pixelsize-subnum))))
 486     (aset xlfd xlfd-regexp-encoding-subnum fontset-name)
 487     (setq fontset (x-compose-font-name xlfd))
 488     (or (query-fontset fontset)
 489         (create-fontset-from-fontset-spec (concat fontset ", ascii:" font)))))
 490
 491 \f
 492 ;; Create standard fontset from 16 dots fonts which are the most widely
 493 ;; installed fonts.  Fonts for Chinese-GB, Korean, and Chinese-CNS are
 494 ;; specified here because FAMILY of those fonts are not "fixed" in
 495 ;; many cases.
 496 (defvar standard-fontset-spec
 497   (purecopy "-*-fixed-medium-r-normal-*-16-*-*-*-*-*-fontset-standard,
 498         chinese-gb2312:-*-medium-r-normal-*-16-*-gb2312*-*,
 499         korean-ksc5601:-*-medium-r-normal-*-16-*-ksc5601*-*,
 500         chinese-cns11643-1:-*-medium-r-normal-*-16-*-cns11643*-1,
 501         chinese-cns11643-2:-*-medium-r-normal-*-16-*-cns11643*-2,
 502         chinese-cns11643-3:-*-medium-r-normal-*-16-*-cns11643*-3,
 503         chinese-cns11643-4:-*-medium-r-normal-*-16-*-cns11643*-4,
 504         chinese-cns11643-5:-*-medium-r-normal-*-16-*-cns11643*-5,
 505         chinese-cns11643-6:-*-medium-r-normal-*-16-*-cns11643*-6,
 506         chinese-cns11643-7:-*-medium-r-normal-*-16-*-cns11643*-7")
 507   "String of fontset spec of the standard fontset.
 508 You have the biggest chance to display international characters
 509 with correct glyphs by using the standard fontset.
 510 See the documentation of `create-fontset-from-fontset-spec' for the format.")
 511
 512 ;; Create fontsets from X resources of the name `fontset-N (class
 513 ;; Fontset-N)' where N is integer 0, 1, ...
 514 ;; The values of the resources the string of the same format as
 515 ;; `standard-fontset-spec'.
 516
 517 (defun create-fontset-from-x-resource ()
 518   (let ((idx 0)
 519         fontset-spec)
 520     (while (setq fontset-spec (x-get-resource (format "fontset-%d" idx)
 521                                               (format "Fontset-%d" idx)))
 522       (create-fontset-from-fontset-spec fontset-spec t 'noerror)
 523       (setq idx (1+ idx)))))
 524
 525 ;;
 526 (provide 'fontset)
 527
 528 ;;; fontset.el ends here