lisp/language/indian.el

   1 ;;; indian.el --- Indian languages support -*- coding: utf-8; -*-
   2
   3 ;; Copyright (C) 1997, 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   4 ;;   Free Software Foundation, Inc.
   5 ;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   6 ;;   National Institute of Advanced Industrial Science and Technology (AIST)
   7 ;;   Registration Number H14PRO021
   8
   9 ;; Maintainer:  Kenichi Handa <handa@m17n.org>
  10 ;;              KAWABATA, Taichi <kawabata@m17n.org>
  11 ;; Keywords:    multilingual, i18n, Indian
  12
  13 ;; This file is part of GNU Emacs.
  14
  15 ;; GNU Emacs is free software: you can redistribute it and/or modify
  16 ;; it under the terms of the GNU General Public License as published by
  17 ;; the Free Software Foundation, either version 3 of the License, or
  18 ;; (at your option) any later version.
  19
  20 ;; GNU Emacs is distributed in the hope that it will be useful,
  21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 ;; GNU General Public License for more details.
  24
  25 ;; You should have received a copy of the GNU General Public License
  26 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  27
  28 ;;; Commentary:
  29
  30 ;; This file contains definitions of Indian language environments, and
  31 ;; setups for displaying the scrtipts used there.
  32
  33 ;;; Code:
  34
  35 (define-coding-system 'in-is13194-devanagari
  36   "8-bit encoding for ASCII (MSB=0) and IS13194-Devanagari (MSB=1)."
  37   :coding-type 'iso-2022
  38   :mnemonic ?D
  39   :designation [ascii indian-is13194 nil nil]
  40   :charset-list '(ascii indian-is13194)
  41   :post-read-conversion 'in-is13194-post-read-conversion
  42   :pre-write-conversion 'in-is13194-pre-write-conversion)
  43
  44 (define-coding-system-alias 'devanagari 'in-is13194-devanagari)
  45
  46 (set-language-info-alist
  47  "Devanagari" '((charset unicode)
  48                 (coding-system utf-8)
  49                 (coding-priority utf-8)
  50                 (input-method . "dev-aiba")
  51                 (documentation . "\
  52 Such languages using Devanagari script as Hindi and Marathi
  53 are supported in this language environment."))
  54  '("Indian"))
  55
  56 (set-language-info-alist
  57  "Bengali" '((charset unicode)
  58              (coding-system utf-8)
  59              (coding-priority utf-8)
  60              (input-method . "bengali-itrans")
  61              (documentation . "\
  62 Such languages using Bengali script as Bengali and Assamese
  63 are supported in this language environment."))
  64  '("Indian"))
  65
  66 (set-language-info-alist
  67  "Punjabi" '((charset unicode)
  68               (coding-system utf-8)
  69               (coding-priority utf-8)
  70               (input-method . "punjabi-itrans")
  71               (documentation . "\
  72 North Indian language Punjabi is supported in this language environment."))
  73  '("Indian"))
  74
  75 (set-language-info-alist
  76  "Gujarati" '((charset unicode)
  77               (coding-system utf-8)
  78               (coding-priority utf-8)
  79               (input-method . "gujarati-itrans")
  80               (documentation . "\
  81 North Indian language Gujarati is supported in this language environment."))
  82  '("Indian"))
  83
  84 (set-language-info-alist
  85  "Oriya" '((charset unicode)
  86               (coding-system utf-8)
  87               (coding-priority utf-8)
  88               (input-method . "oriya-itrans")
  89               (documentation . "\
  90 Such languages using Oriya script as Oriya, Khonti, and Santali
  91 are supported in this language environment."))
  92  '("Indian"))
  93
  94 (set-language-info-alist
  95  "Tamil" '((charset unicode)
  96            (coding-system utf-8)
  97            (coding-priority utf-8)
  98            (input-method . "tamil-itrans")
  99            (documentation . "\
 100 South Indian Language Tamil is supported in this language environment."))
 101  '("Indian"))
 102
 103 (set-language-info-alist
 104  "Telugu" '((charset unicode)
 105             (coding-system utf-8)
 106             (coding-priority utf-8)
 107             (input-method . "telugu-itrans")
 108             (documentation . "\
 109 South Indian Language Telugu is supported in this language environment."))
 110  '("Indian"))
 111
 112 (set-language-info-alist
 113  "Kannada" '((charset unicode)
 114              (coding-system mule-utf-8)
 115              (coding-priority mule-utf-8)
 116              (input-method . "kannada-itrans")
 117              (sample-text . "Kannada (ಕನ್ನಡ)  ನಮಸ್ಕಾರ")
 118              (documentation . "\
 119 Kannada language and script is supported in this language
 120 environment."))
 121  '("Indian"))
 122
 123 (set-language-info-alist
 124  "Malayalam" '((charset unicode)
 125                (coding-system utf-8)
 126                (coding-priority utf-8)
 127                (input-method . "malayalam-itrans")
 128                (documentation . "\
 129 South Indian language Malayalam is supported in this language environment."))
 130  '("Indian"))
 131
 132 (defconst devanagari-composable-pattern
 133   (concat
 134    "\\([अ-औॠॡ][ँं]?\\)\\|[ः।]"
 135    "\\|\\("
 136    "\\(?:\\(?:[क-हक़-य़]्\\)?\\(?:[क-हक़-य़]्\\)?\\(?:[क-हक़-य़]्\\)?[क-हक़-य़]्\\)?"
 137    "[क-हक़-य़]\\(?:्\\|[ा-्ॢॣ]?[ंँ]?\\)?"
 138    "\\)")
 139   "Regexp matching a composable sequence of Devanagari characters.")
 140
 141 (defconst tamil-composable-pattern
 142   (concat
 143    "\\([அ-ஔ]\\)\\|"
 144    "[ஂஃ]\\|" ;; vowel modifier considered independent
 145    "\\(\\(?:\\(?:க்ஷ\\)\\|[க-ஹ]\\)[்ா-ௌ]?\\)\\|"
 146    "\\(ஷ்ரீ\\)")
 147   "Regexp matching a composable sequence of Tamil characters.")
 148
 149 (defconst kannada-composable-pattern
 150   (concat
 151    "\\([ಂ-ಔೠಌ]\\)\\|[ಃ]"
 152    "\\|\\("
 153    "\\(?:\\(?:[ಕ-ಹ]್\\)?\\(?:[ಕ-ಹ]್\\)?\\(?:[ಕ-ಹ]್\\)?[ಕ-ಹ]್\\)?"
 154    "[ಕ-ಹ]\\(?:್\\|[ಾ-್ೕೃ]?\\)?"
 155    "\\)")
 156   "Regexp matching a composable sequence of Kannada characters.")
 157
 158 (defconst malayalam-composable-pattern
 159   (concat
 160    "\\([അ-ഔ][ം]?\\)\\|ഃ"
 161    "\\|\\("
 162    "\\(?:\\(?:[ക-ഹ]്\\)?\\(?:[ക-ഹ]്\\)?\\(?:[ക-ഹ]്\\)?[ക-ഹ]്\\)?"
 163    "[ക-ഹ]\\(?:്\\|[ാ-ൃെേൈൊൊോൌ]?[ം്]?\\)?"
 164    "\\)")
 165   "Regexp matching a composable sequence of Malayalam characters.")
 166
 167 (let ((script-regexp-alist
 168        `((devanagari . "[\x900-\x97F\x200C\x200D]+")
 169          (bengali . "[\x980-\x9FF\x200C\x200D]+")
 170          (gurmukhi . "[\xA00-\xA7F\x200C\x200D]+")
 171          (gujarati . "[\xA80-\xAFF\x200C\x200D]+")
 172          (oriya . "[\xB00-\xB7F\x200C\x200D]+")
 173          (tamil . "[\xB80-\xBFF\x200C\x200D]+")
 174          (telugu . "[\xC00-\xC7F\x200C\x200D]+")
 175          (kannada . "[\xC80-\xCFF\x200C\x200D]+")
 176          (malayalam . "[\xD00-\xD7F\x200C\x200D]+"))))
 177   (map-char-table
 178    #'(lambda (key val)
 179        (let ((slot (assq val script-regexp-alist)))
 180          (if slot
 181              (set-char-table-range
 182               composition-function-table key
 183               (list (vector (cdr slot) 0 'font-shape-gstring))))))
 184    char-script-table))
 185
 186 (provide 'indian)
 187
 188 ;; arch-tag: 83aa8fc7-7ee2-4364-a6e5-498f5e3b8c2f
 189 ;;; indian.el ends here