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;;; indian.el --- Indian languages support -*- coding: utf-8; -*-
;; Copyright (C) 1997, 1999, 2001-2017 Free Software Foundation, Inc.
;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
;; 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 . "devanagari-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"))
;; Replace mnemonic characters in REGEXP according to TABLE. TABLE is
;; an alist of (MNEMONIC-STRING . REPLACEMENT-STRING).
(defun indian-compose-regexp (regexp table)
(let ((case-fold-search nil))
(dolist (elt table)
(setq regexp (replace-regexp-in-string (car elt) (cdr elt) regexp t t)))
regexp))
(defconst devanagari-composable-pattern
(let ((table
'(("a" . "[\u0900-\u0902]") ; vowel modifier (above)
("A" . "\u0903") ; vowel modifier (post)
("V" . "[\u0904-\u0914\u0960-\u0961\u0972]") ; independent vowel
("C" . "[\u0915-\u0939\u0958-\u095F\u0979-\u097F]") ; consonant
("R" . "\u0930") ; RA
("n" . "\u093C") ; NUKTA
("v" . "[\u093E-\u094C\u094E\u0955\u0962-\u0963]") ; vowel sign
("H" . "\u094D") ; HALANT
("s" . "[\u0951-\u0952]") ; stress sign
("t" . "[\u0953-\u0954]") ; accent
("N" . "\u200C") ; ZWNJ
("J" . "\u200D") ; ZWJ
("X" . "[\u0900-\u097F]")))) ; all coverage
(indian-compose-regexp
(concat
;; syllables with an independent vowel, or
"\\(?:RH\\)?Vn?\\(?:J?HR\\)?v*n?a?s?t?A?\\|"
;; consonant-based syllables, or
"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*n?a?s?t?A?\\)\\|"
;; special consonant form, or
"JHR\\|"
;; any other singleton characters
"X")
table))
"Regexp matching a composable sequence of Devanagari characters.")
(defconst bengali-composable-pattern
(let ((table
'(("a" . "\u0981") ; SIGN CANDRABINDU
("A" . "[\u0982-\u0983]") ; SIGN ANUSVARA .. VISARGA
("V" . "[\u0985-\u0994\u09E0-\u09E1]") ; independent vowel
("C" . "[\u0995-\u09B9\u09DC-\u09DF\u09F1]") ; consonant
("B" . "[\u09AC\u09AF-\u09B0\u09F0]") ; BA, YA, RA
("R" . "[\u09B0\u09F0]") ; RA
("n" . "\u09BC") ; NUKTA
("v" . "[\u09BE-\u09CC\u09D7\u09E2-\u09E3]") ; vowel sign
("H" . "\u09CD") ; HALANT
("T" . "\u09CE") ; KHANDA TA
("N" . "\u200C") ; ZWNJ
("J" . "\u200D") ; ZWJ
("X" . "[\u0980-\u09FF]")))) ; all coverage
(indian-compose-regexp
(concat
;; syllables with an independent vowel, or
"\\(?:RH\\)?Vn?\\(?:J?HB\\)?v*n?a?A?\\|"
;; consonant-based syllables, or
"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*[NJ]?v?a?A?\\)\\|"
;; another syllables with an independent vowel, or
"\\(?:RH\\)?T\\|"
;; special consonant form, or
"JHB\\|"
;; any other singleton characters
"X")
table))
"Regexp matching a composable sequence of Bengali characters.")
(defconst gurmukhi-composable-pattern
(let ((table
'(("a" . "[\u0A01-\u0A02\u0A70]") ; SIGN ADAK BINDI .. BINDI, TIPPI
("A" . "\u0A03") ; SIGN VISARGA
("V" . "[\u0A05-\u0A14]") ; independent vowel
("C" . "[\u0A15-\u0A39\u0A59-\u0A5E]") ; consonant
("Y" . "[\u0A2F-u0A30\u0A35\u0A39]") ; YA, RA, VA, HA
("n" . "\u0A3C") ; NUKTA
("v" . "[\u0A3E-\u0A4C]") ; vowel sign
("H" . "\u0A4D") ; VIRAMA
("N" . "\u200C") ; ZWNJ
("J" . "\u200D") ; ZWJ
("X" . "[\u0A00-\u0A7F]")))) ; all coverage
(indian-compose-regexp
(concat
;; consonant-based syllables, or
"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*n?a?A?\\)\\|"
;; syllables with an independent vowel, or
"Vn?\\(?:J?HY\\)?v*n?a?A?\\|"
;; special consonant form, or
"JHY\\|"
;; any other singleton characters
"X")
table))
"Regexp matching a composable sequence of Gurmukhi characters.")
(defconst gujarati-composable-pattern
(let ((table
'(("a" . "[\u0A81-\u0A82]") ; SIGN CANDRABINDU .. ANUSVARA
("A" . "\u0A83") ; SIGN VISARGA
("V" . "[\u0A85-\u0A94\u0AE0-\u0AE1]") ; independent vowel
("C" . "[\u0A95-\u0AB9]") ; consonant
("R" . "\u0AB0") ; RA
("n" . "\u0ABC") ; NUKTA
("v" . "[\u0ABE-\u0ACC\u0AE2-\u0AE3]") ; vowel sign
("H" . "\u0ACD") ; VIRAMA
("N" . "\u200C") ; ZWNJ
("J" . "\u200D") ; ZWJ
("X" . "[\u0A80-\u0AFF]")))) ; all coverage
(indian-compose-regexp
(concat
;; syllables with an independent vowel, or
"\\(?:RH\\)?Vn?\\(?:J?HR\\)?v*n?a?A?\\|"
;; consonant-based syllables, or
"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*n?a?A?\\)\\|"
;; special consonant form, or
"JHR\\|"
;; any other singleton characters
"X")
table))
"Regexp matching a composable sequence of Gujarati characters.")
(defconst oriya-composable-pattern
(let ((table
'(("a" . "\u0B01") ; SIGN CANDRABINDU
("A" . "[\u0B02-\u0B03]") ; SIGN ANUSVARA .. VISARGA
("V" . "[\u0B05-\u0B14\u0B60-\u0B61]") ; independent vowel
("C" . "[\u0B15-\u0B39\u0B5C-\u0B5D\u0B71]") ; consonant
("B" . "[\u0B15-\u0B17\u0B1B-\u0B1D\u0B1F-\u0B21\u0B23-\u0B24\u0B27-\u0B30\u0B32-\u0B35\u0B38-\u0B39]") ; consonant with below form
("R" . "\u0B30") ; RA
("n" . "\u0B3C") ; NUKTA
("v" . "[\u0B3E-\u0B4C\u0B56-\u0B57\u0B62-\u0B63]") ; vowel sign
("H" . "\u0B4D") ; VIRAMA
("N" . "\u200C") ; ZWNJ
("J" . "\u200D") ; ZWJ
("X" . "[\u0B00-\u0B7F]")))) ; all coverage
(indian-compose-regexp
(concat
;; syllables with an independent vowel, or
"\\(?:RH\\)?Vn?\\(?:J?HB\\)?v*n?a?A?\\|"
;; consonant-based syllables, or
"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*n?a?A?\\)\\|"
;; special consonant form, or
"JHB\\|"
;; any other singleton characters
"X")
table))
"Regexp matching a composable sequence of Oriya characters.")
(defconst tamil-composable-pattern
(let ((table
'(("a" . "\u0B82") ; SIGN ANUSVARA
("V" . "[\u0B85-\u0B94]") ; independent vowel
("C" . "[\u0B95-\u0BB9]") ; consonant
("v" . "[\u0BBE-\u0BCC\u0BD7]") ; vowel sign
("H" . "\u0BCD") ; VIRAMA
("N" . "\u200C") ; ZWNJ
("J" . "\u200D") ; ZWJ
("X" . "[\u0B80-\u0BFF]")))) ; all coverage
(indian-compose-regexp
(concat
;; consonant-based syllables, or
"C\\(?:J?HJ?C\\)*\\(?:H[NJ]?\\|v*a?\\)\\|"
;; syllables with an independent vowel, or
"Vv*a?\\|"
;; any other singleton characters
"X")
table))
"Regexp matching a composable sequence of Tamil characters.")
(defconst telugu-composable-pattern
(let ((table
'(("a" . "[\u0C01-\u0C03]") ; SIGN CANDRABINDU .. VISARGA
("V" . "[\u0C05-\u0C14\u0C60-\u0C61]") ; independent vowel
("C" . "[\u0C15-\u0C39\u0C58-\u0C59]") ; consonant
("v" . "[\u0C3E-\u0C4C\u0C55-\u0C56\u0C62-\u0C63]") ; vowel sign
("H" . "\u0C4D") ; VIRAMA
("N" . "\u200C") ; ZWNJ
("J" . "\u200D") ; ZWJ
("X" . "[\u0C00-\u0C7F]")))) ; all coverage
(indian-compose-regexp
(concat
;; consonant-based syllables, or
"C\\(?:J?HJ?C\\)*\\(?:H[NJ]?\\|v*a?\\)\\|"
;; syllables with an independent vowel, or
"V\\(?:J?HC\\)?v*a?\\|"
;; special consonant form, or
"JHC\\|"
;; any other singleton characters
"X")
table))
"Regexp matching a composable sequence of Telugu characters.")
(defconst kannada-composable-pattern
(let ((table
'(("A" . "[\u0C82-\u0C83]") ; SIGN ANUSVARA .. VISARGA
("V" . "[\u0C85-\u0C94\u0CE0-\u0CE1]") ; independent vowel
("C" . "[\u0C95-\u0CB9\u0CDE]") ; consonant
("R" . "\u0CB0") ; RA
("n" . "\u0CBC") ; NUKTA
("v" . "[\u0CBE-\u0CCC\u0CD5-\u0CD6\u0CE2-\u0CE3]") ; vowel sign
("H" . "\u0CCD") ; VIRAMA
("N" . "\u200C") ; ZWNJ
("J" . "\u200D") ; ZWJ
("X" . "[\u0C80-\u0CFF]")))) ; all coverage
(indian-compose-regexp
(concat
;; syllables with an independent vowel, or
"\\(?:RH\\)?Vn?\\(?:J?HC\\)?v?A?\\|"
;; consonant-based syllables, or
"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*n?A?\\)\\|"
;; special consonant form, or
"JHC\\|"
;; any other singleton characters
"X")
table))
"Regexp matching a composable sequence of Kannada characters.")
(defconst malayalam-composable-pattern
(let ((table
'(("A" . "[\u0D02-\u0D03]") ; SIGN ANUSVARA .. VISARGA
("V" . "[\u0D05-\u0D14\u0D60-\u0D61]") ; independent vowel
("C" . "[\u0D15-\u0D39]") ; consonant
("Y" . "[\u0D2F-\u0D30\u0D32\u0D35]") ; YA, RA, LA, VA
("v" . "[\u0D3E-\u0D4C\u0D57\u0D62-\u0D63]") ; postbase matra
("H" . "\u0D4D") ; SIGN VIRAMA
("N" . "\u200C") ; ZWNJ
("J" . "\u200D") ; ZWJ
("X" . "[\u0D00-\u0D7F]")))) ; all coverage
(indian-compose-regexp
(concat
;; consonant-based syllables, or
"C\\(?:J?HJ?C\\)*\\(?:H[NJ]?\\|v?A?\\)\\|"
;; syllables with an independent vowel, or
"V\\(?:J?HY\\)?v*?A?\\|"
;; special consonant form, or
"JHY\\|"
;; any other singleton characters
"X")
table))
"Regexp matching a composable sequence of Malayalam characters.")
(let ((script-regexp-alist
`((devanagari . ,devanagari-composable-pattern)
(bengali . ,bengali-composable-pattern)
(gurmukhi . ,gurmukhi-composable-pattern)
(gujarati . ,gujarati-composable-pattern)
(oriya . ,oriya-composable-pattern)
(tamil . ,tamil-composable-pattern)
(telugu . ,telugu-composable-pattern)
(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)
;;; indian.el ends here
|
