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;;; indian.el --- Indian languages support -*- coding: utf-8; -*-
;; Copyright (C) 1997, 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
;; Free Software Foundation, Inc.
;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
;; National Institute of Advanced Industrial Science and Technology (AIST)
;; Registration Number H14PRO021
;; Maintainer: Kenichi Handa <handa@m17n.org>
;; KAWABATA, Taichi <kawabata@m17n.org>
;; Keywords: multilingual, i18n, Indian
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This file contains definitions of Indian language environments, and
;; setups for displaying the scrtipts used there.
;;; Code:
(define-coding-system 'in-is13194-devanagari
"8-bit encoding for ASCII (MSB=0) and IS13194-Devanagari (MSB=1)."
:coding-type 'iso-2022
:mnemonic ?D
:designation [ascii indian-is13194 nil nil]
:charset-list '(ascii indian-is13194)
:post-read-conversion 'in-is13194-post-read-conversion
:pre-write-conversion 'in-is13194-pre-write-conversion)
(define-coding-system-alias 'devanagari 'in-is13194-devanagari)
(set-language-info-alist
"Devanagari" '((charset unicode)
(coding-system utf-8)
(coding-priority utf-8)
(input-method . "dev-aiba")
(documentation . "\
Such languages using Devanagari script as Hindi and Marathi
are supported in this language environment."))
'("Indian"))
(set-language-info-alist
"Bengali" '((charset unicode)
(coding-system utf-8)
(coding-priority utf-8)
(input-method . "bengali-itrans")
(documentation . "\
Such languages using Bengali script as Bengali and Assamese
are supported in this language environment."))
'("Indian"))
(set-language-info-alist
"Punjabi" '((charset unicode)
(coding-system utf-8)
(coding-priority utf-8)
(input-method . "punjabi-itrans")
(documentation . "\
North Indian language Punjabi is supported in this language environment."))
'("Indian"))
(set-language-info-alist
"Gujarati" '((charset unicode)
(coding-system utf-8)
(coding-priority utf-8)
(input-method . "gujarati-itrans")
(documentation . "\
North Indian language Gujarati is supported in this language environment."))
'("Indian"))
(set-language-info-alist
"Oriya" '((charset unicode)
(coding-system utf-8)
(coding-priority utf-8)
(input-method . "oriya-itrans")
(documentation . "\
Such languages using Oriya script as Oriya, Khonti, and Santali
are supported in this language environment."))
'("Indian"))
(set-language-info-alist
"Tamil" '((charset unicode)
(coding-system utf-8)
(coding-priority utf-8)
(input-method . "tamil-itrans")
(documentation . "\
South Indian Language Tamil is supported in this language environment."))
'("Indian"))
(set-language-info-alist
"Telugu" '((charset unicode)
(coding-system utf-8)
(coding-priority utf-8)
(input-method . "telugu-itrans")
(documentation . "\
South Indian Language Telugu is supported in this language environment."))
'("Indian"))
(set-language-info-alist
"Kannada" '((charset unicode)
(coding-system mule-utf-8)
(coding-priority mule-utf-8)
(input-method . "kannada-itrans")
(sample-text . "Kannada (ಕನ್ನಡ) ನಮಸ್ಕಾರ")
(documentation . "\
Kannada language and script is supported in this language
environment."))
'("Indian"))
(set-language-info-alist
"Malayalam" '((charset unicode)
(coding-system utf-8)
(coding-priority utf-8)
(input-method . "malayalam-itrans")
(documentation . "\
South Indian language Malayalam is supported in this language environment."))
'("Indian"))
(defconst devanagari-composable-pattern
(concat
"\\([अ-औॠॡ][ँं]?\\)\\|[ः।]"
"\\|\\("
"\\(?:\\(?:[क-हक़-य़]्\\)?\\(?:[क-हक़-य़]्\\)?\\(?:[क-हक़-य़]्\\)?[क-हक़-य़]्\\)?"
"[क-हक़-य़]\\(?:्\\|[ा-्ॢॣ]?[ंँ]?\\)?"
"\\)")
"Regexp matching a composable sequence of Devanagari characters.")
(defconst tamil-composable-pattern
(concat
"\\([அ-ஔ]\\)\\|"
"[ஂஃ]\\|" ;; vowel modifier considered independent
"\\(\\(?:\\(?:க்ஷ\\)\\|[க-ஹ]\\)[்ா-ௌ]?\\)\\|"
"\\(ஷ்ரீ\\)")
"Regexp matching a composable sequence of Tamil characters.")
(defconst kannada-composable-pattern
(concat
"\\([ಂ-ಔೠಌ]\\)\\|[ಃ]"
"\\|\\("
"\\(?:\\(?:[ಕ-ಹ]್\\)?\\(?:[ಕ-ಹ]್\\)?\\(?:[ಕ-ಹ]್\\)?[ಕ-ಹ]್\\)?"
"[ಕ-ಹ]\\(?:್\\|[ಾ-್ೕೃ]?\\)?"
"\\)")
"Regexp matching a composable sequence of Kannada characters.")
(defconst malayalam-composable-pattern
(concat
"\\([അ-ഔ][ം]?\\)\\|ഃ"
"\\|\\("
"\\(?:\\(?:[ക-ഹ]്\\)?\\(?:[ക-ഹ]്\\)?\\(?:[ക-ഹ]്\\)?[ക-ഹ]്\\)?"
"[ക-ഹ]\\(?:്\\|[ാ-ൃെേൈൊൊോൌ]?[ം്]?\\)?"
"\\)")
"Regexp matching a composable sequence of Malayalam characters.")
(let ((script-regexp-alist
`((devanagari . ,devanagari-composable-pattern)
(bengali . "[\x980-\x9FF\x200C\x200D]+")
(gurmukhi . "[\xA00-\xA7F\x200C\x200D]+")
(gujarati . "[\xA80-\xAFF\x200C\x200D]+")
(oriya . "[\xB00-\xB7F\x200C\x200D]+")
(tamil . ,tamil-composable-pattern)
(telugu . "[\xC00-\xC7F\x200C\x200D]+")
(kannada . ,kannada-composable-pattern)
(malayalam . ,malayalam-composable-pattern))))
(map-char-table
#'(lambda (key val)
(let ((slot (assq val script-regexp-alist)))
(if slot
(set-char-table-range
composition-function-table key
(list (vector (cdr slot) 0 'font-shape-gstring))))))
char-script-table))
(provide 'indian)
;; arch-tag: 83aa8fc7-7ee2-4364-a6e5-498f5e3b8c2f
;;; indian.el ends here
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