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 ;; Copyright (C) 2001 Free Software Foundation, Inc.
   6 ;; Copyright (C) 2003
   7 ;;   National Institute of Advanced Industrial Science and Technology (AIST)
   8 ;;   Registration Number H13PRO009
   9
  10 ;; Keywords: mule, i18n, fontset
  11
  12 ;; This file is part of GNU Emacs.
  13
  14 ;; GNU Emacs is free software; you can redistribute it and/or modify
  15 ;; it under the terms of the GNU General Public License as published by
  16 ;; the Free Software Foundation; either version 2, or (at your option)
  17 ;; any later version.
  18
  19 ;; GNU Emacs is distributed in the hope that it will be useful,
  20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 ;; GNU General Public License for more details.
  23
  24 ;; You should have received a copy of the GNU General Public License
  25 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  26 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  27 ;; Boston, MA 02111-1307, USA.
  28
  29 ;;; Commentary:
  30
  31 ;;; Code:
  32
  33 ;; Setup font-encoding-alist for all known encodings.
  34
  35 (setq font-encoding-alist
  36       '(("iso8859-1$" . iso-8859-1)
  37         ("iso8859-2$" . iso-8859-2)
  38         ("iso8859-3$" . iso-8859-3)
  39         ("iso8859-4$" . iso-8859-4)
  40         ("iso8859-5$" . iso-8859-5)
  41         ("iso8859-6$" . iso-8859-6)
  42         ("iso8859-7$" . iso-8859-7)
  43         ("iso8859-8$" . iso-8859-8)
  44         ("iso8859-9$" . iso-8859-9)
  45         ("iso8859-10$" . iso-8859-10)
  46         ("iso8859-11$" . iso-8859-11)
  47         ("iso8859-13$" . iso-8859-13)
  48         ("iso8859-14$" . iso-8859-14)
  49         ("iso8859-15$" . iso-8859-15)
  50         ("gb2312.1980" . chinese-gb2312)
  51         ("jisx0208.1978" . japanese-jisx0208-1978)
  52         ("jisx0208" . japanese-jisx0208)
  53         ("jisx0201" . jisx0201)
  54         ("jisx0212" . japanese-jisx0212)
  55         ("ksc5601.1987" . korean-ksc5601)
  56         ("cns11643.1992.*1" . chinese-cns11643-1)
  57         ("cns11643.1992.*2" . chinese-cns11643-2)
  58         ("cns11643.1992.*3" . chinese-cns11643-3)
  59         ("cns11643.1992.*4" . chinese-cns11643-4)
  60         ("cns11643.1992.*5" . chinese-cns11643-5)
  61         ("cns11643.1992.*6" . chinese-cns11643-6)
  62         ("cns11643.1992.*7" . chinese-cns11643-7)
  63         ("cns11643.92p1-0" . chinese-cns11643-1)
  64         ("cns11643.92p2-0" . chinese-cns11643-2)
  65         ("cns11643.92p3-0" . chinese-cns11643-3)
  66         ("cns11643.92p4-0" . chinese-cns11643-4)
  67         ("cns11643.92p5-0" . chinese-cns11643-5)
  68         ("cns11643.92p6-0" . chinese-cns11643-6)
  69         ("cns11643.92p7-0" . chinese-cns11643-7)
  70         ("big5" . big5)
  71         ("sisheng_cwnn" . chinese-sisheng)
  72         ("viscii" . viscii)
  73         ("tis620" . tis620-2533)
  74         ("mulearabic-0" . arabic-digit)
  75         ("mulearabic-1" . arabic-1-column)
  76         ("mulearabic-2" . arabic-2-column)
  77         ("muleipa" . ipa)
  78         ("ethiopic-unicode" . ethiopic)
  79         ("is13194-devanagari" . indian-is13194)
  80         ("Devanagari-CDAC" . devanagari-cdac)
  81         ("Sanskrit-CDAC" . sanskrit-cdac)
  82         ("Bengali-CDAC" . bengali-cdac)
  83         ("Assamese-CDAC" . assamese-cdac)
  84         ("Punjabi-CDAC" . punjabi-cdac)
  85         ("Gujarati-CDAC" . gujarati-cdac)
  86         ("Oriya-CDAC" . oriya-cdac)
  87         ("Tamil-CDAC" . tamil-cdac)
  88         ("Telugu-CDAC" . telugu-cdac)
  89         ("Kannada-CDAC" . kannada-cdac)
  90         ("Malayalam-CDAC" . malayalam-cdac)
  91         ("Devanagari-Akruti" . devanagari-akruti)
  92         ("Bengali-Akruti" . bengali-akruti)
  93         ("Punjabi-Akruti" . punjabi-akruti)
  94         ("Gujarati-Akruti" . gujarati-akruti)
  95         ("Oriya-Akruti" . oriya-akruti)
  96         ("Tamil-Akruti" . tamil-akruti)
  97         ("Telugu-Akruti" . telugu-akruti)
  98         ("Kannada-Akruti" . kannada-akruti)
  99         ("Malayalam-Akruti" . malayalam-akruti)
 100         ("muleindian-2" . indian-2-column)
 101         ("muleindian-1" . indian-1-column)
 102         ("mulelao-1" . mule-lao)
 103         ("muletibetan-2" . tibetan)
 104         ("muletibetan-1" . tibetan-1-column)
 105         ("jisx0213.2000-1" . japanese-jisx0213-1)
 106         ("jisx0213.2000-2" . japanese-jisx0213-2)
 107         ("jisx0213.2004-1" . japanese-jisx0213.2004-1)
 108         ("abobe-symbol" . symbol)
 109         ("iso10646-1$" . (unicode-bmp . nil))
 110         ("iso10646.indian-1" . (unicode-bmp . nil))))
 111
 112
 113 ;; Set standard fontname specification of characters in the default
 114 ;; fontset to find an appropriate font for each script/charset.  The
 115 ;; specification has the form ((SCRIPT FONT-SPEC ...) ...), where
 116 ;; FONT-SPEC is:
 117 ;;      a vector [ FAMILY WEIGHT SLANT ADSTYLE REGISTRY ],
 118 ;;      or a cons (FAMILY . REGISTRY),
 119 ;;      or a string FONT-NAME.
 120 ;;
 121 ;; FAMILY, WEIGHT, SLANT, and ADSTYLE may be nil, in which case, the
 122 ;; the corresponding name of default face is used.  If REGISTRY
 123 ;; contains a character `-', the string before that is embedded in
 124 ;; `CHARSET_REGISTRY' field, and the string after that is embedded in
 125 ;; `CHARSET_ENCODING' field.  If it does not contain `-', the whole
 126 ;; string is embedded in `CHARSET_REGISTRY' field, and a wild card
 127 ;; character `*' is embedded in `CHARSET_ENCODING' field.
 128 ;;
 129 ;; SCRIPT is a symbol that appears as an element of the char table
 130 ;; `char-script-table'.  SCRIPT may be a charset specifying the range
 131 ;; of characters.
 132
 133 (defun setup-default-fontset ()
 134   "Setup the default fontset."
 135   (new-fontset
 136    "fontset-default"
 137    '(;; for each script
 138      (latin (nil . "ISO8859-1")
 139             (nil . "ISO8859-2")
 140             (nil . "ISO8859-3")
 141             (nil . "ISO8859-4")
 142             (nil . "ISO8859-9")
 143             (nil . "ISO8859-10")
 144             (nil . "ISO8859-13")
 145             (nil . "ISO8859-14")
 146             (nil . "ISO8859-15")
 147             (nil . "VISCII1.1-1"))
 148
 149      (thai (nil . "TIS620*")
 150            (nil . "ISO8859-11"))
 151
 152      (devanagari (nil . "iso10646.indian-1"))
 153
 154      (lao  (nil . "MuleLao-1"))
 155
 156      ;; both for script and charset.
 157      (tibetan (nil . "muletibetan-2"))
 158
 159      ;; both for script and charset.
 160      (ethiopic (nil . "ethiopic-unicode"))
 161
 162      (greek (nil . "ISO8859-7"))
 163
 164      (cyrillic (nil . "ISO8859-5"))
 165
 166      (arabic (nil . "MuleArabic-0")
 167              (nil . "MuleArabic-1")
 168              (nil . "MuleArabic-2")
 169              (nil . "ISO8859-6"))
 170
 171      (hebrew (nil . "ISO8859-8"))
 172
 173      (kana (nil . "JISX0208*")
 174            (nil . "GB2312.1980-0")
 175            (nil . "KSC5601.1987*")
 176            (nil . "JISX0201*")
 177            (nil . "JISX0213.2000-1")
 178            (nil . "JISX0213.2004-1"))
 179
 180      (bopomofo (nil . "sisheng_cwnn-0"))
 181
 182      (han (nil . "GB2312.1980-0")
 183           (nil . "JISX0208*")
 184           (nil . "JISX0212*")
 185           (nil . "big5*")
 186           (nil . "KSC5601.1987*")
 187           (nil . "CNS11643.1992-1")
 188           (nil . "CNS11643.1992-2")
 189           (nil . "CNS11643.1992-3")
 190           (nil . "CNS11643.1992-4")
 191           (nil . "CNS11643.1992-5")
 192           (nil . "CNS11643.1992-6")
 193           (nil . "CNS11643.1992-7")
 194           (nil . "gbk-0")
 195           (nil . "JISX0213.2000-1")
 196           (nil . "JISX0213.2000-2")
 197           (nil . "JISX0213.2004-1"))
 198
 199      (cjk-misc (nil . "GB2312.1980-0")
 200                (nil . "JISX0208*")
 201                (nil . "JISX0212*")
 202                (nil . "big5*")
 203                (nil . "KSC5601.1987*")
 204                (nil . "CNS11643.1992-1")
 205                (nil . "CNS11643.1992-2")
 206                (nil . "CNS11643.1992-3")
 207                (nil . "CNS11643.1992-4")
 208                (nil . "CNS11643.1992-5")
 209                (nil . "CNS11643.1992-6")
 210                (nil . "CNS11643.1992-7")
 211                (nil . "gbk-0")
 212                (nil . "JISX0213.2000-1")
 213                (nil . "JISX0213.2000-2"))
 214
 215      (hangul (nil . "KSC5601.1987-0"))
 216
 217      ;; for each charset
 218      (ascii (nil . "ISO8859-1"))
 219      (arabic-digit ("*" . "MuleArabic-0"))
 220      (arabic-1-column ("*" . "MuleArabic-1"))
 221      (arabic-2-column ("*" . "MuleArabic-2"))
 222      (indian-is13194 (nil . "is13194-devanagari"))
 223      (indian-1-column ("*" . "muleindian-2"))
 224      ;; Indian CDAC
 225      (devanagari-cdac (nil . "Devanagari-CDAC"))
 226      (sanskrit-cdac (nil . "Sanskrit-CDAC"))
 227      (bengali-cdac (nil . "Bengali-CDAC"))
 228      (assamese-cdac (nil . "Assamese-CDAC"))
 229      (punjabi-cdac (nil . "Punjabi-CDAC"))
 230      (gujarati-cdac (nil . "Gujarati-CDAC"))
 231      (oriya-cdac (nil . "Oriya-CDAC"))
 232      (tamil-cdac (nil . "Tamil-CDAC"))
 233      (telugu-cdac (nil . "Telugu-CDAC"))
 234      (kannada-cdac (nil . "Kannada-CDAC"))
 235      (malayalam-cdac (nil . "Malayalam-CDAC"))
 236      ;; Indian AKRUTI
 237      (devanagari-akruti (nil . "Devanagari-Akruti"))
 238      (bengali-akruti (nil . "Bengali-Akruti"))
 239      (punjabi-akruti (nil . "Punjabi-Akruti"))
 240      (gujarati-akruti (nil . "Gujarati-Akruti"))
 241      (oriya-akruti (nil . "Oriya-Akruti"))
 242      (tamil-akruti (nil . "Tamil-Akruti"))
 243      (telugu-akruti (nil . "Telugu-Akruti"))
 244      (kannada-akruti (nil . "Kannada-Akruti"))
 245      (malayalam-akruti (nil . "Malayalam-Akruti"))
 246      ;;(devanagari-glyph ("altsys-dv_ttsurekh" . "devanagari-cdac"))
 247      ;;(malayalam-glyph ("altsys-ml_ttkarthika" . "malayalam-cdac"))
 248      (ipa (nil . "MuleIPA-1"))
 249
 250      ;; Fallback fonts
 251      (nil (nil . "gb2312.1980")
 252           (nil . "jisx0208")
 253           (nil . "ksc5601.1987")
 254           (nil . "CNS11643.1992-1")
 255           (nil . "CNS11643.1992-2")
 256           (nil . "CNS11643.1992-3")
 257           (nil . "CNS11643.1992-4")
 258           (nil . "CNS11643.1992-5")
 259           (nil . "CNS11643.1992-6")
 260           (nil . "CNS11643.1992-7")
 261           (nil . "big5")
 262           (nil . "jisx0213.2000-1")
 263           (nil . "jisx0213.2004-1")
 264           (nil . "jisx0212"))
 265      ))
 266
 267   ;; Append Unicode fonts.
 268   ;; This may find fonts with more variants (bold, italic) but which
 269   ;; don't cover many characters.
 270   (set-fontset-font "fontset-default" nil
 271                     '(nil . "iso10646-1") nil 'append)
 272   ;; These may find fonts that cover many characters but with fewer
 273   ;; variants.
 274   (set-fontset-font "fontset-default" nil
 275                     '("gnu-unifont" . "iso10646-1") nil 'append)
 276   (set-fontset-font "fontset-default" nil
 277                     '("mutt-clearlyu" . "iso10646-1") nil 'append))
 278
 279 ;; These are the registered registries/encodings from
 280 ;; ftp://ftp.x.org/pub/DOCS/registry 2001/06/01
 281
 282 ;; Name                                            Reference
 283 ;; ----                                            ---------
 284 ;; "DEC"                                           [27]
 285 ;;         registry prefix
 286 ;; "DEC.CNS11643.1986-2"                           [53]
 287 ;;         CNS11643 2-plane using the encoding
 288 ;;         suggested in that standard
 289 ;; "DEC.DTSCS.1990-2"                              [54]
 290 ;;         DEC Taiwan Supplemental Character Set
 291 ;; "fujitsu.u90x01.1991-0"                         [87]
 292 ;; "fujitsu.u90x03.1991-0"                         [87]
 293 ;; "GB2312.1980-0"                                 [39],[12]
 294 ;;         China (PRC) Hanzi, GL encoding
 295 ;; "GB2312.1980-1"                                 [39]
 296 ;;         (deprecated)
 297 ;;         China (PRC) Hanzi, GR encoding
 298 ;; "HP-Arabic8"                                    [36]
 299 ;;         HPARABIC8 8-bit character set
 300 ;; "HP-East8"                                      [36]
 301 ;;         HPEAST8 8-bit character set
 302 ;; "HP-Greek8"                                     [36]
 303 ;;         HPGREEK8 8-bit character set
 304 ;; "HP-Hebrew8"                                    [36]
 305 ;;         HPHEBREW8 8-bit character set
 306 ;; "HP-Japanese15"                                 [36]
 307 ;;         HPJAPAN15 15-bit characer set,
 308 ;;         modified from industry defacto
 309 ;;         standard Shift-JIS
 310 ;; "HP-Kana8"                                      [36]
 311 ;;         HPKANA8 8-bit character set
 312 ;; "HP-Korean15"                                   [36]
 313 ;;         HPKOREAN15 15-bit character set
 314 ;; "HP-Roman8"                                     [36]
 315 ;;         HPROMAN8 8-bit character set
 316 ;; "HP-SChinese15"                                 [36]
 317 ;;         HPSCHINA15 15-bit character set for
 318 ;;         support of Simplified Chinese
 319 ;; "HP-TChinese15"                                 [36]
 320 ;;         HPTCHINA15 15-bit character set for
 321 ;;         support of Traditional Chinese
 322 ;; "HP-Turkish8"                                   [36]
 323 ;;         HPTURKISH8 8-bit character set
 324 ;; "IPSYS"                                         [59]
 325 ;;         registry prefix
 326 ;; "IPSYS.IE-1"                                    [59]
 327 ;; "ISO2022"<REG>"-"<ENC>                          [44]
 328 ;; "ISO646.1991-IRV"                               [107]
 329 ;;         ISO 646 International Reference Version
 330 ;; "ISO8859-1"                                     [15],[12]
 331 ;;         ISO Latin alphabet No. 1
 332 ;; "ISO8859-2"                                     [15],[12]
 333 ;;         ISO Latin alphabet No. 2
 334 ;; "ISO8859-3"                                     [15],[12]
 335 ;;         ISO Latin alphabet No. 3
 336 ;; "ISO8859-4"                                     [15],[12]
 337 ;;         ISO Latin alphabet No. 4
 338 ;; "ISO8859-5"                                     [15],[12]
 339 ;;         ISO Latin/Cyrillic alphabet
 340 ;; "ISO8859-6"                                     [15],[12]
 341 ;;         ISO Latin/Arabic alphabet
 342 ;; "ISO8859-7"                                     [15],[12]
 343 ;;         ISO Latin/Greek alphabet
 344 ;; "ISO8859-8"                                     [15],[12]
 345 ;;         ISO Latin/Hebrew alphabet
 346 ;; "ISO8859-9"                                     [15],[12]
 347 ;;         ISO Latin alphabet No. 5
 348 ;; "ISO8859-10"                                    [15],[12]
 349 ;;         ISO Latin alphabet No. 6
 350 ;; "ISO8859-13"                                    [15],[12]
 351 ;;         ISO Latin alphabet No. 7
 352 ;; "ISO8859-14"                                    [15],[12]
 353 ;;         ISO Latin alphabet No. 8
 354 ;; "ISO8859-15"                                    [15],[12]
 355 ;;         ISO Latin alphabet No. 9
 356 ;; "FCD8859-15"                                    [7]
 357 ;;         (deprecated)
 358 ;;         ISO Latin alphabet No. 9, Final Committee Draft
 359 ;; "ISO10646-1"                                    [133]
 360 ;;         Unicode Universal Multiple-Octet Coded Character Set
 361 ;; "ISO10646-MES"                                  [133]
 362 ;;         (deprecated)
 363 ;;         Unicode Minimum European Subset
 364 ;; "JISX0201.1976-0"                               [38],[12]
 365 ;;         8-Bit Alphanumeric-Katakana Code
 366 ;; "JISX0208.1983-0"                               [40],[12]
 367 ;;         Japanese Graphic Character Set,
 368 ;;         GL encoding
 369 ;; "JISX0208.1990-0"                               [71]
 370 ;;         Japanese Graphic Character Set,
 371 ;;         GL encoding
 372 ;; "JISX0208.1983-1"                               [40]
 373 ;;         (deprecated)
 374 ;;         Japanese Graphic Character Set,
 375 ;;         GR encoding
 376 ;; "JISX0212.1990-0"                               [72]
 377 ;;         Supplementary Japanese Graphic Character Set,
 378 ;;         GL encoding
 379 ;; "KOI8-R"                                        [119]
 380 ;;         Cyrillic alphabet
 381 ;; "KSC5601.1987-0"                                [41],[12]
 382 ;;         Korean Graphic Character Set,
 383 ;;         GL encoding
 384 ;; "KSC5601.1987-1"                                [41]
 385 ;;         (deprecated)
 386 ;;         Korean Graphic Character Set,
 387 ;;         GR encoding
 388 ;; "omron_CNS11643-0"                              [45]
 389 ;; "omron_CNS11643-1"                              [45]
 390 ;; "omron_BIG5-0"                                  [45]
 391 ;; "omron_BIG5-1"                                  [45]
 392 ;; "wn.tamil.1993"                                 [103]
 393
 394 (defun set-font-encoding (pattern charset)
 395   "Set arguments in `font-encoding-alist' (which see)."
 396   (let ((slot (assoc pattern font-encoding-alist)))
 397     (if slot
 398         (setcdr slot charset)
 399       (setq font-encoding-alist
 400             (cons (cons pattern charset) font-encoding-alist)))))
 401
 402 ;; Setting for suppressing XLoadQueryFont on big fonts.
 403 (setq x-pixel-size-width-font-regexp
 404       "gb2312\\|jisx0208\\|ksc5601\\|cns11643\\|big5")
 405
 406 ;; These fonts require vertical centering.
 407 (setq vertical-centering-font-regexp
 408       "gb2312\\|jisx0208\\|jisx0212\\|ksc5601\\|cns11643\\|big5")
 409
 410 ;; CDAC fonts are actually smaller than their design sizes.
 411 (setq face-font-rescale-alist
 412       '(("-cdac$" . 1.3)))
 413
 414 (defvar x-font-name-charset-alist nil
 415   "This variable has no meaning now.  Just kept for backward compatibility.")
 416
 417 ;;; XLFD (X Logical Font Description) format handler.
 418
 419 ;; Define XLFD's field index numbers.           ; field name
 420 (defconst xlfd-regexp-family-subnum 0)          ; FOUNDRY and FAMILY
 421 (defconst xlfd-regexp-weight-subnum 1)          ; WEIGHT_NAME
 422 (defconst xlfd-regexp-slant-subnum 2)           ; SLANT
 423 (defconst xlfd-regexp-swidth-subnum 3)          ; SETWIDTH_NAME
 424 (defconst xlfd-regexp-adstyle-subnum 4)         ; ADD_STYLE_NAME
 425 (defconst xlfd-regexp-pixelsize-subnum 5)       ; PIXEL_SIZE
 426 (defconst xlfd-regexp-pointsize-subnum 6)       ; POINT_SIZE
 427 (defconst xlfd-regexp-resx-subnum 7)            ; RESOLUTION_X
 428 (defconst xlfd-regexp-resy-subnum 8)            ; RESOLUTION_Y
 429 (defconst xlfd-regexp-spacing-subnum 8)         ; SPACING
 430 (defconst xlfd-regexp-avgwidth-subnum 10)       ; AVERAGE_WIDTH
 431 (defconst xlfd-regexp-registry-subnum 11)       ; REGISTRY and ENCODING
 432
 433 ;; Regular expression matching against a fontname which conforms to
 434 ;; XLFD (X Logical Font Description).  All fields in XLFD should be
 435 ;; not be omitted (but can be a wild card) to be matched.
 436 (defconst xlfd-tight-regexp
 437   "^\
 438 -\\([^-]*-[^-]*\\)-\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)\
 439 -\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)\
 440 -\\([^-]*\\)-\\([^-]*\\)-\\([^-]*-[^-]*\\)$")
 441
 442 ;; Regular expression matching against a fontname which conforms to
 443 ;; XLFD (X Logical Font Description).  All fields in XLFD from FOUNDRY
 444 ;; to ADSTYLE, REGISTRY, and ENCODING should be not be omitted (but
 445 ;; can be a wild card) to be matched.
 446 (defconst xlfd-style-regexp
 447   "^\
 448 -\\([^-]*-[^-]*\\)-\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)-\\([^-]*\\)-.*\
 449 -\\([^-]*-[^-]*\\)$")
 450
 451 ;; List of field numbers of XLFD whose values are numeric.
 452 (defconst xlfd-regexp-numeric-subnums
 453   (list xlfd-regexp-pixelsize-subnum    ;5
 454         xlfd-regexp-pointsize-subnum    ;6
 455         xlfd-regexp-resx-subnum         ;7
 456         xlfd-regexp-resy-subnum         ;8
 457         xlfd-regexp-avgwidth-subnum     ;10
 458         ))
 459
 460 (defun x-decompose-font-name (pattern)
 461   "Decompose PATTERN into XLFD fields and return a vector of the fields.
 462 The length of the vector is 12.
 463 The FOUNDRY and FAMILY fields are concatinated and stored in the first
 464 element of the vector.
 465 The REGISTRY and ENCODING fields are concatinated and stored in the last
 466 element of the vector.
 467
 468 Return nil if PATTERN doesn't conform to XLFD."
 469   (if (string-match xlfd-tight-regexp pattern)
 470       (let ((xlfd-fields (make-vector 12 nil)))
 471         (dotimes (i 12)
 472           (aset xlfd-fields i (match-string (1+ i) pattern)))
 473         (dotimes (i 12)
 474           (if (string-match "^[*-]+$" (aref xlfd-fields i))
 475               (aset xlfd-fields i nil)))
 476         xlfd-fields)))
 477
 478 (defun x-compose-font-name (fields &optional reduce)
 479   "Compose X fontname from FIELDS.
 480 FIELDS is a vector of XLFD fields, the length 12.
 481 If a field is nil, wild-card letter `*' is embedded.
 482 Optional argument REDUCE is always ignored.  It exists just for
 483 backward compatibility."
 484   (concat "-" (mapconcat (lambda (x) (or x "*")) fields "-")))
 485
 486 (defun x-must-resolve-font-name (xlfd-fields)
 487   "Like `x-resolve-font-name', but always return a font name.
 488 XLFD-FIELDS is a vector of XLFD (X Logical Font Description) fields.
 489 If no font matching XLFD-FIELDS is available, successively replace
 490 parts of the font name pattern with \"*\" until some font is found.
 491 Value is name of that font."
 492   (let ((ascii-font nil) (index 0))
 493     (while (and (null ascii-font) (<= index xlfd-regexp-registry-subnum))
 494       (let ((pattern (x-compose-font-name xlfd-fields)))
 495         (condition-case nil
 496             (setq ascii-font (x-resolve-font-name pattern))
 497           (error
 498            (message "Warning: no fonts matching `%s' available" pattern)
 499            (aset xlfd-fields index "*")
 500            (setq index (1+ index))))))
 501     (unless ascii-font
 502       (error "No fonts found"))
 503     ascii-font))
 504
 505
 506 (defun x-complement-fontset-spec (xlfd-fields fontlist)
 507   "Complement elements of FONTLIST based on XLFD-FIELDS.
 508 XLFD-FIELDS is a vector of XLFD (X Logical Font Description) fields.
 509 FONTLIST is an alist of script names vs the corresponding font names.
 510
 511 The font names are complemented as below.
 512
 513 If a font name matches `xlfd-style-regexp', each field of wild card is
 514 replaced by the corresponding fields in XLFD-FIELDS."
 515   (let ((default-spec (vector (aref xlfd-fields xlfd-regexp-family-subnum)
 516                               (aref xlfd-fields xlfd-regexp-weight-subnum)
 517                               (aref xlfd-fields xlfd-regexp-slant-subnum)
 518                               (aref xlfd-fields xlfd-regexp-swidth-subnum)
 519                               (aref xlfd-fields xlfd-regexp-adstyle-subnum)
 520                               (aref xlfd-fields xlfd-regexp-registry-subnum))))
 521     (dolist (elt fontlist)
 522       (let ((name (cadr elt))
 523             font-spec)
 524         (when (or (string-match xlfd-style-regexp name)
 525                   (and (setq name (car (x-list-fonts name nil nil 1)))
 526                        (string-match xlfd-style-regexp name)))
 527           (setq font-spec (make-vector 6 nil))
 528           (dotimes (i 6)
 529             (aset font-spec i (match-string (1+ i) name)))
 530           (dotimes (i 5)
 531             (if (string-match "^[*-]+$" (aref font-spec i))
 532                 (aset font-spec i (aref default-spec i))))
 533           (setcar (cdr elt) font-spec))))
 534
 535     fontlist))
 536
 537 (defun fontset-name-p (fontset)
 538   "Return non-nil if FONTSET is valid as fontset name.
 539 A valid fontset name should conform to XLFD (X Logical Font Description)
 540 with \"fontset\" in `<CHARSET_REGISTRY> field."
 541   (and (string-match xlfd-tight-regexp fontset)
 542        (string= (match-string (1+ xlfd-regexp-registry-subnum) fontset)
 543                 "fontset")))
 544
 545 (defun generate-fontset-menu ()
 546   "Return list to be appended to `x-fixed-font-alist'.
 547 Done when `mouse-set-font' is called."
 548   (let (l)
 549     (dolist (fontset (fontset-list))
 550       (or (string-match "fontset-default$" fontset)
 551           (push (list (fontset-plain-name fontset) fontset) l)))
 552     (cons "Fontset"
 553           (sort l #'(lambda (x y) (string< (car x) (car y)))))))
 554
 555 (defun fontset-plain-name (fontset)
 556   "Return a plain and descriptive name of FONTSET."
 557   (if (not (setq fontset (query-fontset fontset)))
 558       (error "Invalid fontset: %s" fontset))
 559   (let ((xlfd-fields (x-decompose-font-name fontset)))
 560     (if xlfd-fields
 561         (let ((family (aref xlfd-fields xlfd-regexp-family-subnum))
 562               (weight (aref xlfd-fields xlfd-regexp-weight-subnum))
 563               (slant  (aref xlfd-fields xlfd-regexp-slant-subnum))
 564               (swidth (aref xlfd-fields xlfd-regexp-swidth-subnum))
 565               (size   (aref xlfd-fields xlfd-regexp-pixelsize-subnum))
 566               (nickname (aref xlfd-fields xlfd-regexp-registry-subnum))
 567               name)
 568           (if (not (string-match "^fontset-\\(.*\\)$" nickname))
 569               (setq nickname family)
 570             (setq nickname (match-string 1 nickname)))
 571           (if (and size (> (string-to-int size) 0))
 572               (setq name (format "%s: %s-dot" nickname size))
 573             (setq name nickname))
 574           (and weight
 575                (cond ((string-match "^medium$" weight)
 576                       (setq name (concat name " " "medium")))
 577                      ((string-match "^bold$\\|^demibold$" weight)
 578                       (setq name (concat name " " weight)))))
 579           (and slant
 580                (cond ((string-match "^i$" slant)
 581                       (setq name (concat name " " "italic")))
 582                      ((string-match "^o$" slant)
 583                       (setq name (concat name " " "slant")))
 584                      ((string-match "^ri$" slant)
 585                       (setq name (concat name " " "reverse italic")))
 586                      ((string-match "^ro$" slant)
 587                       (setq name (concat name " " "reverse slant")))))
 588           name)
 589       fontset)))
 590
 591 (defvar charset-script-alist
 592   '((ascii . latin)
 593     (latin-iso8859-1 . latin)
 594     (latin-iso8859-2 . latin)
 595     (latin-iso8859-3 . latin)
 596     (latin-iso8859-4 . latin)
 597     (latin-iso8859-9 . latin)
 598     (latin-iso8859-10 . latin)
 599     (latin-iso8859-13 . latin)
 600     (latin-iso8859-14 . latin)
 601     (latin-iso8859-15 . latin)
 602     (latin-iso8859-16 . latin)
 603     (latin-jisx0201 . latin)
 604     (thai-tis620 . thai)
 605     (cyrillic-iso8859-5 . cyrillic)
 606     (arabic-iso8859-6 . arabic)
 607     (greek-iso8859-7 . latin)
 608     (hebrew-iso8859-8 . latin)
 609     (katakana-jisx0201 . kana)
 610     (chinese-gb2312 . han)
 611     (chinese-big5-1 . han)
 612     (chinese-big5-2 . han)
 613     (chinese-cns11643-1 . han)
 614     (chinese-cns11643-2 . han)
 615     (chinese-cns11643-3 . han)
 616     (chinese-cns11643-4 . han)
 617     (chinese-cns11643-5 . han)
 618     (chinese-cns11643-6 . han)
 619     (chinese-cns11643-7 . han)
 620     (japanese-jisx0208 . han)
 621     (japanese-jisx0208-1978 . han)
 622     (japanese-jisx0212 . han)
 623     (japanese-jisx0213-1 . han)
 624     (japanese-jisx0213-2 . han)
 625     (korean-ksc5601 . hangul)
 626     (chinese-sisheng . bopomofo)
 627     (vietnamese-viscii-lower . latin)
 628     (vietnamese-viscii-upper . latin)
 629     (arabic-digit . arabic)
 630     (arabic-1-column . arabic)
 631     (arabic-2-column . arabic)
 632     (indian-is13194 . devanagari)
 633     (indian-glyph . devanagari)
 634     (indian-1-column . devanagari)
 635     (indian-2-column . devanagari)
 636     (tibetan-1-column . tibetan))
 637   "Alist of charsets vs the corresponding most appropriate scripts.
 638
 639 This alist is used by the function `create-fontset-from-fontset-spec'
 640 to map charsets to scripts.")
 641
 642 (defun create-fontset-from-fontset-spec (fontset-spec
 643                                          &optional style-variant noerror)
 644   "Create a fontset from fontset specification string FONTSET-SPEC.
 645 FONTSET-SPEC is a string of the format:
 646         FONTSET-NAME,SCRIPT-NAME0:FONT-NAME0,SCRIPT-NAME1:FONT-NAME1, ...
 647 Any number of SPACE, TAB, and NEWLINE can be put before and after commas.
 648
 649 When a frame uses the fontset as the `font' parameter, the frame's
 650 default font name is derived from FONTSET-NAME by substituting
 651 \"iso8859-1\" for the tail part \"fontset-XXX\".  But, if SCRIPT-NAMEn
 652 is \"ascii\", use the corresponding FONT-NAMEn as the default font
 653 name.
 654
 655 Optional 2nd and 3rd arguments are ignored.  They exist just for
 656 backward compatibility.
 657
 658 It returns a name of the created fontset.
 659
 660 For backward compatibility, SCRIPT-NAME may be a charset name, in
 661 which case, the corresponding script is decided by the variable
 662 `charset-script-alist' (which see)."
 663   (or (string-match "^[^,]+" fontset-spec)
 664       (error "Invalid fontset spec: %s" fontset-spec))
 665   (let ((idx (match-end 0))
 666         (name (match-string 0 fontset-spec))
 667         xlfd-fields script fontlist)
 668     (setq xlfd-fields (x-decompose-font-name name))
 669     (or xlfd-fields
 670         (error "Fontset name \"%s\" not conforming to XLFD" name))
 671
 672     ;; At first, extract pairs of charset and fontname from FONTSET-SPEC.
 673     (while (string-match "[, \t\n]*\\([^:]+\\):\\([^,]+\\)" fontset-spec idx)
 674       (setq idx (match-end 0))
 675       (setq script (intern (match-string 1 fontset-spec)))
 676       (if (or (eq script 'ascii)
 677               (memq script (char-table-extra-slot char-script-table 0))
 678               (setq script (cdr (assq script charset-script-alist))))
 679           (setq fontlist (cons (list script (match-string 2 fontset-spec))
 680                                fontlist))))
 681
 682     ;; Complement FONTLIST.
 683     (setq fontlist (x-complement-fontset-spec xlfd-fields fontlist))
 684
 685     ;; Create a fontset.
 686     (new-fontset name fontlist)))
 687
 688 (defun create-fontset-from-ascii-font (font &optional resolved-font
 689                                             fontset-name)
 690   "Create a fontset from an ASCII font FONT.
 691
 692 Optional 1st arg RESOLVED-FONT is a resolved name of FONT.  If
 693 omitted, `x-resolve-font-name' is called to get the resolved name.  At
 694 this time, if FONT is not available, an error is signaled.
 695
 696 Optional 2nd arg FONTSET-NAME is a string to be used in
 697 `<CHARSET_ENCODING>' fields of a new fontset name.  If it is omitted,
 698 an appropriate name is generated automatically.
 699
 700 It returns a name of the created fontset."
 701   (setq font (downcase font))
 702   (setq resolved-font
 703         (downcase (or resolved-font (x-resolve-font-name font))))
 704   (let ((xlfd (x-decompose-font-name resolved-font))
 705         fontset)
 706     (if fontset-name
 707         (setq fontset-name (downcase fontset-name))
 708       (if (query-fontset "fontset-startup")
 709           (setq fontset-name
 710                 (subst-char-in-string
 711                  ?- ?_ (aref xlfd xlfd-regexp-registry-subnum) t))
 712         (setq fontset-name "startup")))
 713     (aset xlfd xlfd-regexp-registry-subnum
 714           (format "fontset-%s" fontset-name))
 715     (setq fontset (x-compose-font-name xlfd))
 716     (or (query-fontset fontset)
 717         (create-fontset-from-fontset-spec (concat fontset ", ascii:" font)))))
 718
 719 \f
 720 ;; Create standard fontset from 16 dots fonts which are the most widely
 721 ;; installed fonts.  Fonts for Chinese-GB, Korean, and Chinese-CNS are
 722 ;; specified here because FAMILY of those fonts are not "fixed" in
 723 ;; many cases.
 724 (defvar standard-fontset-spec
 725   (purecopy "-*-fixed-medium-r-normal-*-16-*-*-*-*-*-fontset-standard")
 726   "String of fontset spec of the standard fontset.
 727 You have the biggest chance to display international characters
 728 with correct glyphs by using the standard fontset.
 729 See the documentation of `create-fontset-from-fontset-spec' for the format.")
 730
 731
 732 ;; Create fontsets from X resources of the name `fontset-N (class
 733 ;; Fontset-N)' where N is integer 0, 1, ...
 734 ;; The values of the resources the string of the same format as
 735 ;; `standard-fontset-spec'.
 736
 737 (defun create-fontset-from-x-resource ()
 738   (let ((idx 0)
 739         fontset-spec)
 740     (while (setq fontset-spec (x-get-resource (format "fontset-%d" idx)
 741                                               (format "Fontset-%d" idx)))
 742       (create-fontset-from-fontset-spec fontset-spec t 'noerror)
 743       (setq idx (1+ idx)))))
 744
 745 ;;
 746 (provide 'fontset)
 747
 748 ;;; arch-tag: bb53e629-0234-403c-950e-551e61554849
 749 ;;; fontset.el ends here