391 lines
13 KiB
EmacsLisp
391 lines
13 KiB
EmacsLisp
;;; indian.el --- Indian languages support -*- coding: utf-8; -*-
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;; Copyright (C) 1997, 1999, 2001-2018 Free Software Foundation, Inc.
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;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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;; National Institute of Advanced Industrial Science and Technology (AIST)
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;; Registration Number H14PRO021
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;; Maintainer: Kenichi Handa <handa@m17n.org>
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;; KAWABATA, Taichi <kawabata@m17n.org>
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;; Keywords: multilingual, i18n, Indian
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file contains definitions of Indian language environments, and
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;; setups for displaying the scrtipts used there.
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;;; Code:
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(define-coding-system 'in-is13194-devanagari
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"8-bit encoding for ASCII (MSB=0) and IS13194-Devanagari (MSB=1)."
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:coding-type 'iso-2022
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:mnemonic ?D
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:designation [ascii indian-is13194 nil nil]
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:charset-list '(ascii indian-is13194)
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:post-read-conversion 'in-is13194-post-read-conversion
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:pre-write-conversion 'in-is13194-pre-write-conversion)
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(define-coding-system-alias 'devanagari 'in-is13194-devanagari)
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(set-language-info-alist
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"Devanagari" '((charset unicode)
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(coding-system utf-8)
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(coding-priority utf-8)
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(input-method . "devanagari-aiba")
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(documentation . "\
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Such languages using Devanagari script as Hindi and Marathi
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are supported in this language environment."))
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'("Indian"))
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(set-language-info-alist
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"Bengali" '((charset unicode)
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(coding-system utf-8)
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(coding-priority utf-8)
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(input-method . "bengali-itrans")
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(documentation . "\
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Such languages using Bengali script as Bengali and Assamese
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are supported in this language environment."))
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'("Indian"))
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(set-language-info-alist
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"Punjabi" '((charset unicode)
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(coding-system utf-8)
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(coding-priority utf-8)
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(input-method . "punjabi-itrans")
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(documentation . "\
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North Indian language Punjabi is supported in this language environment."))
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'("Indian"))
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(set-language-info-alist
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"Gujarati" '((charset unicode)
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(coding-system utf-8)
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(coding-priority utf-8)
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(input-method . "gujarati-itrans")
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(documentation . "\
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North Indian language Gujarati is supported in this language environment."))
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'("Indian"))
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(set-language-info-alist
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"Oriya" '((charset unicode)
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(coding-system utf-8)
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(coding-priority utf-8)
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(input-method . "oriya-itrans")
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(documentation . "\
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Such languages using Oriya script as Oriya, Khonti, and Santali
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are supported in this language environment."))
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'("Indian"))
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(set-language-info-alist
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"Tamil" '((charset unicode)
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(coding-system utf-8)
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(coding-priority utf-8)
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(input-method . "tamil-itrans")
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(documentation . "\
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South Indian Language Tamil is supported in this language environment."))
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'("Indian"))
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(set-language-info-alist
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"Telugu" '((charset unicode)
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(coding-system utf-8)
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(coding-priority utf-8)
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(input-method . "telugu-itrans")
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(documentation . "\
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South Indian Language Telugu is supported in this language environment."))
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'("Indian"))
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(set-language-info-alist
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"Kannada" '((charset unicode)
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(coding-system mule-utf-8)
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(coding-priority mule-utf-8)
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(input-method . "kannada-itrans")
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(sample-text . "Kannada (ಕನ್ನಡ) ನಮಸ್ಕಾರ")
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(documentation . "\
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Kannada language and script is supported in this language
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environment."))
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'("Indian"))
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(set-language-info-alist
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"Malayalam" '((charset unicode)
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(coding-system utf-8)
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(coding-priority utf-8)
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(input-method . "malayalam-itrans")
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(documentation . "\
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South Indian language Malayalam is supported in this language environment."))
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'("Indian"))
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;; Replace mnemonic characters in REGEXP according to TABLE. TABLE is
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;; an alist of (MNEMONIC-STRING . REPLACEMENT-STRING).
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(defun indian-compose-regexp (regexp table)
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(let ((case-fold-search nil))
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(dolist (elt table)
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(setq regexp (replace-regexp-in-string (car elt) (cdr elt) regexp t t)))
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regexp))
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(defconst devanagari-composable-pattern
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(let ((table
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'(("a" . "[\u0900-\u0902]") ; vowel modifier (above)
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("A" . "\u0903") ; vowel modifier (post)
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("V" . "[\u0904-\u0914\u0960-\u0961\u0972]") ; independent vowel
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("C" . "[\u0915-\u0939\u0958-\u095F\u0979-\u097F]") ; consonant
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("R" . "\u0930") ; RA
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("n" . "\u093C") ; NUKTA
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("v" . "[\u093E-\u094C\u094E\u0955\u0962-\u0963]") ; vowel sign
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("H" . "\u094D") ; HALANT
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("s" . "[\u0951-\u0952]") ; stress sign
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("t" . "[\u0953-\u0954]") ; accent
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("N" . "\u200C") ; ZWNJ
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("J" . "\u200D") ; ZWJ
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("X" . "[\u0900-\u097F]")))) ; all coverage
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(indian-compose-regexp
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(concat
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;; syllables with an independent vowel, or
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"\\(?:RH\\)?Vn?\\(?:J?HR\\)?v*n?a?s?t?A?\\|"
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;; consonant-based syllables, or
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"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*n?a?s?t?A?\\)\\|"
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;; special consonant form, or
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"JHR\\|"
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;; any other singleton characters
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"X")
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table))
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"Regexp matching a composable sequence of Devanagari characters.")
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(defconst bengali-composable-pattern
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(let ((table
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'(("a" . "\u0981") ; SIGN CANDRABINDU
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("A" . "[\u0982-\u0983]") ; SIGN ANUSVARA .. VISARGA
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("V" . "[\u0985-\u0994\u09E0-\u09E1]") ; independent vowel
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("C" . "[\u0995-\u09B9\u09DC-\u09DF\u09F1]") ; consonant
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("B" . "[\u09AC\u09AF-\u09B0\u09F0]") ; BA, YA, RA
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("R" . "[\u09B0\u09F0]") ; RA
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("n" . "\u09BC") ; NUKTA
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("v" . "[\u09BE-\u09CC\u09D7\u09E2-\u09E3]") ; vowel sign
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("H" . "\u09CD") ; HALANT
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("T" . "\u09CE") ; KHANDA TA
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("N" . "\u200C") ; ZWNJ
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("J" . "\u200D") ; ZWJ
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("X" . "[\u0980-\u09FF]")))) ; all coverage
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(indian-compose-regexp
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(concat
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;; syllables with an independent vowel, or
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"\\(?:RH\\)?Vn?\\(?:J?HB\\)?v*n?a?A?\\|"
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;; consonant-based syllables, or
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"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*[NJ]?v?a?A?\\)\\|"
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;; another syllables with an independent vowel, or
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"\\(?:RH\\)?T\\|"
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;; special consonant form, or
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"JHB\\|"
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;; any other singleton characters
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"X")
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table))
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"Regexp matching a composable sequence of Bengali characters.")
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(defconst gurmukhi-composable-pattern
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(let ((table
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'(("a" . "[\u0A01-\u0A02\u0A70]") ; SIGN ADAK BINDI .. BINDI, TIPPI
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("A" . "\u0A03") ; SIGN VISARGA
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("V" . "[\u0A05-\u0A14]") ; independent vowel
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("C" . "[\u0A15-\u0A39\u0A59-\u0A5E]") ; consonant
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("Y" . "[\u0A2F-u0A30\u0A35\u0A39]") ; YA, RA, VA, HA
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("n" . "\u0A3C") ; NUKTA
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("v" . "[\u0A3E-\u0A4C]") ; vowel sign
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("H" . "\u0A4D") ; VIRAMA
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("N" . "\u200C") ; ZWNJ
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("J" . "\u200D") ; ZWJ
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("X" . "[\u0A00-\u0A7F]")))) ; all coverage
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(indian-compose-regexp
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(concat
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;; consonant-based syllables, or
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"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*n?a?A?\\)\\|"
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;; syllables with an independent vowel, or
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"Vn?\\(?:J?HY\\)?v*n?a?A?\\|"
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;; special consonant form, or
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"JHY\\|"
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;; any other singleton characters
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"X")
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table))
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"Regexp matching a composable sequence of Gurmukhi characters.")
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(defconst gujarati-composable-pattern
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(let ((table
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'(("a" . "[\u0A81-\u0A82]") ; SIGN CANDRABINDU .. ANUSVARA
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("A" . "\u0A83") ; SIGN VISARGA
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("V" . "[\u0A85-\u0A94\u0AE0-\u0AE1]") ; independent vowel
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("C" . "[\u0A95-\u0AB9]") ; consonant
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("R" . "\u0AB0") ; RA
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("n" . "\u0ABC") ; NUKTA
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("v" . "[\u0ABE-\u0ACC\u0AE2-\u0AE3]") ; vowel sign
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("H" . "\u0ACD") ; VIRAMA
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("N" . "\u200C") ; ZWNJ
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("J" . "\u200D") ; ZWJ
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("X" . "[\u0A80-\u0AFF]")))) ; all coverage
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(indian-compose-regexp
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(concat
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;; syllables with an independent vowel, or
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"\\(?:RH\\)?Vn?\\(?:J?HR\\)?v*n?a?A?\\|"
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;; consonant-based syllables, or
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"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*n?a?A?\\)\\|"
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;; special consonant form, or
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"JHR\\|"
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;; any other singleton characters
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"X")
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table))
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"Regexp matching a composable sequence of Gujarati characters.")
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(defconst oriya-composable-pattern
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(let ((table
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'(("a" . "\u0B01") ; SIGN CANDRABINDU
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("A" . "[\u0B02-\u0B03]") ; SIGN ANUSVARA .. VISARGA
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("V" . "[\u0B05-\u0B14\u0B60-\u0B61]") ; independent vowel
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("C" . "[\u0B15-\u0B39\u0B5C-\u0B5D\u0B71]") ; consonant
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("B" . "[\u0B15-\u0B17\u0B1B-\u0B1D\u0B1F-\u0B21\u0B23-\u0B24\u0B27-\u0B30\u0B32-\u0B35\u0B38-\u0B39]") ; consonant with below form
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("R" . "\u0B30") ; RA
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("n" . "\u0B3C") ; NUKTA
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("v" . "[\u0B3E-\u0B4C\u0B56-\u0B57\u0B62-\u0B63]") ; vowel sign
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("H" . "\u0B4D") ; VIRAMA
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("N" . "\u200C") ; ZWNJ
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("J" . "\u200D") ; ZWJ
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("X" . "[\u0B00-\u0B7F]")))) ; all coverage
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(indian-compose-regexp
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(concat
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;; syllables with an independent vowel, or
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"\\(?:RH\\)?Vn?\\(?:J?HB\\)?v*n?a?A?\\|"
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;; consonant-based syllables, or
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"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*n?a?A?\\)\\|"
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;; special consonant form, or
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"JHB\\|"
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;; any other singleton characters
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"X")
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table))
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"Regexp matching a composable sequence of Oriya characters.")
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(defconst tamil-composable-pattern
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(let ((table
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'(("a" . "\u0B82") ; SIGN ANUSVARA
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("V" . "[\u0B85-\u0B94]") ; independent vowel
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("C" . "[\u0B95-\u0BB9]") ; consonant
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("v" . "[\u0BBE-\u0BCC\u0BD7]") ; vowel sign
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("H" . "\u0BCD") ; VIRAMA
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("N" . "\u200C") ; ZWNJ
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("J" . "\u200D") ; ZWJ
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("X" . "[\u0B80-\u0BFF]")))) ; all coverage
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(indian-compose-regexp
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(concat
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;; consonant-based syllables, or
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"C\\(?:J?HJ?C\\)*\\(?:H[NJ]?\\|v*a?\\)\\|"
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;; syllables with an independent vowel, or
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"Vv*a?\\|"
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;; any other singleton characters
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"X")
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table))
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"Regexp matching a composable sequence of Tamil characters.")
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(defconst telugu-composable-pattern
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(let ((table
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'(("a" . "[\u0C01-\u0C03]") ; SIGN CANDRABINDU .. VISARGA
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("V" . "[\u0C05-\u0C14\u0C60-\u0C61]") ; independent vowel
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("C" . "[\u0C15-\u0C39\u0C58-\u0C59]") ; consonant
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("v" . "[\u0C3E-\u0C4C\u0C55-\u0C56\u0C62-\u0C63]") ; vowel sign
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("H" . "\u0C4D") ; VIRAMA
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("N" . "\u200C") ; ZWNJ
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("J" . "\u200D") ; ZWJ
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("X" . "[\u0C00-\u0C7F]")))) ; all coverage
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(indian-compose-regexp
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(concat
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;; consonant-based syllables, or
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"C\\(?:J?HJ?C\\)*\\(?:H[NJ]?\\|v*a?\\)\\|"
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;; syllables with an independent vowel, or
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"V\\(?:J?HC\\)?v*a?\\|"
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;; special consonant form, or
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"JHC\\|"
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;; any other singleton characters
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"X")
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table))
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"Regexp matching a composable sequence of Telugu characters.")
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(defconst kannada-composable-pattern
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(let ((table
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'(("A" . "[\u0C82-\u0C83]") ; SIGN ANUSVARA .. VISARGA
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("V" . "[\u0C85-\u0C94\u0CE0-\u0CE1]") ; independent vowel
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("C" . "[\u0C95-\u0CB9\u0CDE]") ; consonant
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("R" . "\u0CB0") ; RA
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("n" . "\u0CBC") ; NUKTA
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("v" . "[\u0CBE-\u0CCC\u0CD5-\u0CD6\u0CE2-\u0CE3]") ; vowel sign
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("H" . "\u0CCD") ; VIRAMA
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("N" . "\u200C") ; ZWNJ
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("J" . "\u200D") ; ZWJ
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("X" . "[\u0C80-\u0CFF]")))) ; all coverage
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(indian-compose-regexp
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(concat
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;; syllables with an independent vowel, or
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"\\(?:RH\\)?Vn?\\(?:J?HC\\)?v?A?\\|"
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;; consonant-based syllables, or
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"Cn?\\(?:J?HJ?Cn?\\)*\\(?:H[NJ]?\\|v*n?A?\\)\\|"
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;; special consonant form, or
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"JHC\\|"
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;; any other singleton characters
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"X")
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table))
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"Regexp matching a composable sequence of Kannada characters.")
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(defconst malayalam-composable-pattern
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(let ((table
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'(("A" . "[\u0D02-\u0D03]") ; SIGN ANUSVARA .. VISARGA
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("V" . "[\u0D05-\u0D14\u0D60-\u0D61]") ; independent vowel
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("C" . "[\u0D15-\u0D39]") ; consonant
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("Y" . "[\u0D2F-\u0D30\u0D32\u0D35]") ; YA, RA, LA, VA
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("v" . "[\u0D3E-\u0D4C\u0D57\u0D62-\u0D63]") ; postbase matra
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("H" . "\u0D4D") ; SIGN VIRAMA
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("N" . "\u200C") ; ZWNJ
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("J" . "\u200D") ; ZWJ
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("X" . "[\u0D00-\u0D7F]")))) ; all coverage
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(indian-compose-regexp
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(concat
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;; consonant-based syllables, or
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"C\\(?:J?HJ?C\\)*\\(?:H[NJ]?\\|v?A?\\)\\|"
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;; syllables with an independent vowel, or
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"V\\(?:J?HY\\)?v*?A?\\|"
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;; special consonant form, or
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"JHY\\|"
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;; any other singleton characters
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"X")
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table))
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"Regexp matching a composable sequence of Malayalam characters.")
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(let ((script-regexp-alist
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`((devanagari . ,devanagari-composable-pattern)
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(bengali . ,bengali-composable-pattern)
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(gurmukhi . ,gurmukhi-composable-pattern)
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(gujarati . ,gujarati-composable-pattern)
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(oriya . ,oriya-composable-pattern)
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(tamil . ,tamil-composable-pattern)
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(telugu . ,telugu-composable-pattern)
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(kannada . ,kannada-composable-pattern)
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(malayalam . ,malayalam-composable-pattern))))
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(map-char-table
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#'(lambda (key val)
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(let ((slot (assq val script-regexp-alist)))
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(if slot
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(set-char-table-range
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composition-function-table key
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(list (vector (cdr slot) 0 'font-shape-gstring))))))
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char-script-table))
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(provide 'indian)
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;;; indian.el ends here
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