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emacs/lisp/language/indian.el
Paul Eggert bc511a64f6 Prefer HTTPS to FTP and HTTP in documentation 
Most of this change is to boilerplate commentary such as license URLs.
This change was prompted by ftp://ftp.gnu.org's going-away party,
planned for November.  Change these FTP URLs to https://ftp.gnu.org
instead.  Make similar changes for URLs to other organizations moving
away from FTP.  Also, change HTTP to HTTPS for URLs to gnu.org and
fsf.org when this works, as this will further help defend against
man-in-the-middle attacks (for this part I omitted the MS-DOS and
MS-Windows sources and the test tarballs to keep the workload down).
HTTPS is not fully working to lists.gnu.org so I left those URLs alone
for now.
2017-09-13 15:54:37 -07:00

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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 <https://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
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