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354 lines
10 KiB
EmacsLisp
354 lines
10 KiB
EmacsLisp
;;; indian.el --- Support for Indian Languages
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;; Copyright (C) 1995 Free Software Foundation, Inc.
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;; Author: KAWABATA, Taichi <kawabata@is.s.u-tokyo.ac.jp>
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;; Keywords: multilingual, 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 2, or (at your option)
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;; 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; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; History:
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;; 1996.10.18 written by KAWABATA, Taichi <kawabata@is.s.u-tokyo.ac.jp>
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;; For Indian, the character set IS 13194 is supported.
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;;
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;; IS 13194 does not specifically assign glyphs for each characters.
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;; Following code is not specific to each Indian language.
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;;
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;; Eventually, this code will support generic information about
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;; following scripts.
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;;
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;; Devanagari
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;; Bengali
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;; Gurmukhi
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;; Gujarati
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;; Oriya
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;; Tamil
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;; Telgu
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;; Kannada
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;; Malayalam
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;;
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;; In this file, charsets other than charset-ascii and charset-indian-is13194
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;; should not be used except in the comment.
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;;; Code:
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(define-prefix-command 'describe-indian-environment-map)
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(define-key-after describe-language-environment-map [Indian]
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'("Indian" . describe-indian-environment-map)
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t)
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(define-prefix-command 'setup-indian-environment-map)
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(define-key-after setup-language-environment-map [Indian]
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'("Indian" . setup-indian-environment-map)
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t)
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;; Followings are what you see when you refer to the Emacs
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;; representations of IS 13194 charcters. However, this is merely
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;; tentative apperance, and you must convert them by
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;; indian-to-xxxxxx(specific script) function to use them.
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;; Devanagari is not an exception of this rule.
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;; 0xa0 //(5!"#$%&'()*+,-./(B
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;; 0xb0 (50123456789:;<=>?(B
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;; 0xc0 (5@ABCDEFGHIJKLMNO(B
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;; 0xd0 (5PQRSTUVWXYZ[\]^_(B
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;; 0xe0 (5`abcdefghijklmno(B
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;; 0xf0 (5pqrstuvwxyz{|}~(B//
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;; Note - In IS 13194, several symbols are obtained by special
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;; combination of several characters and Nukta sign.
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;;
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;; Sanskrit Vowel R -> (5*(B + (5i(B
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;; Sanskrit Vowel L -> (5&(B + (5i(B
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;; Sanskrit Vowel LL -> (5'(B + (5i(B
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;; Sanskrit Avagrah -> (5j(B + (5i(B
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;; OM -> (5!(B + (5i(B
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;;
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;; Note - IS 13194 defines ATR(0xEF) and EXT(0xF0), but they are
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;; not used in Emacs.
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;;
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;; Note - the above characters DO NOT represent any script. For
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;; example, if you want to obtain Devanagari character, you must do
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;; something like the following.
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;;
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;; (char-to-string (indian-to-devanagari ?(5$(B))
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;; "$(5!$(B"
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(let ((deflist
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'(;; chars syntax category
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("(5!"#(B" "w" ?7) ; vowel-modifying diacritical mark
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; chandrabindu, anuswar, visarga
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("(5$(B-(52(B" "w" ?1) ; base (independent) vowel
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("(53(B-(5X(B" "w" ?0) ; consonant
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("(5Z(B-(5g(B" "w" ?8) ; matra
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("(5q(B-(5z(B" "w" ?6) ; digit
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))
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elm chars len syntax category to ch i)
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(while deflist
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(setq elm (car deflist))
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(setq chars (car elm)
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len (length chars)
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syntax (nth 1 elm)
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category (nth 2 elm)
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i 0)
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(while (< i len)
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(if (= (aref chars i) ?-)
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(setq i (1+ i)
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to (sref chars i))
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(setq ch (sref chars i)
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to ch))
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(while (<= ch to)
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(modify-syntax-entry ch syntax)
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(modify-category-entry ch category)
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(setq ch (1+ ch)))
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(setq i (+ i (char-bytes to))))
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(setq deflist (cdr deflist))))
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;;; ITRANS
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;;
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;; ITRANS is one of the most popular method to exchange indian scripts
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;; electronically. Here is the table to convert between ITRANS code and
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;; IS 13194 code.
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(defvar indian-itrans-consonant-alist
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'(
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("k" . "(53(B")
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("kh" . "(54(B")
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("g" . "(55(B")
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("gh" . "(56(B")
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("N^" . "(57(B")
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("ch" . "(58(B")
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("chh" . "(59(B")
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("j" . "(5:(B")
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("jh" . "(5;(B")
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("JN" . "(5<(B")
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("T" . "(5=(B")
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("Th" . "(5>(B")
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("D" . "(5?(B")
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("Dh" . "(5@(B")
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("N" . "(5A(B")
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("t" . "(5B(B")
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("th" . "(5C(B")
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("d" . "(5D(B")
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("dh" . "(5E(B")
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("n" . "(5F(B")
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("nh" . "(5G(B") ; For transcription of non-Devanagari Languages.
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("p" . "(5H(B")
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("ph" . "(5I(B")
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("b" . "(5J(B")
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("bh" . "(5K(B")
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("m" . "(5L(B")
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("y" . "(5M(B")
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("yh" . "(5N(B") ; For transcription of non-Devanagari Languages.
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("r" . "(5O(B")
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("rh" . "(5P(B") ; For transcription of non-Devanagari Languages.
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("l" . "(5Q(B")
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("v" . "(5T(B")
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("sh" . "(5U(B")
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("shh" . "(5V(B")
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("s" . "(5W(B")
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("h" . "(5X(B")
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("ld" . "(5R(B")
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("L" . "(5R(B")
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("ksh" . "$(5!3!h!V(B")
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("GY" . "***GY***") ; Must check out later.
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;; special consonants
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("q" . "(53i(B")
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("K" . "(54i(B")
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("G" . "(55i(B")
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("z" . "(5:i(B")
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("f" . "(5Ii(B")
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(".D" . "(5?i(B")
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(".Dh" . "(5@i(B")
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))
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(defvar indian-itrans-vowel-sign-alist
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'(
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;; Special treatment unique to IS 13194 Transliteration
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("" . "(5h(B")
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("a" . "")
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;; Matra (Vowel Sign)
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("aa" . "(5Z(B")
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("A" . "(5Z(B")
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("i" . "(5[(B")
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("ii" . "(5\(B")
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("I" . "(5\(B")
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("u" . "(5](B")
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("uu" . "(5^(B")
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("U" . "(5^(B")
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("R^i" . "(5_(B") ; These must be checked out later.
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("R^I" . "(5_i(B")
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("L^i" . "(5[i(B")
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("L^I" . "(5\i(B")
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("E" . "(5`(B") ; For transcription of non-Devanangri Languages.
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("e" . "(5a(B")
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("ai" . "(5b(B")
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;; ("e.c" . "(5c(B") ; Tentatively suppressed.
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("O" . "(5d(B") ; For transcription of non-Devanagari Languages.
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("o" . "(5e(B")
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("au" . "(5f(B")
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;; ("o.c" . "(5g(B") ; Tentatively suppressed.
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))
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;;
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;; Independent vowels and other signs.
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;;
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(defvar indian-itrans-other-letters-alist
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'(
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("a" . "(5$(B")
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("aa" . "(5%(B")
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("A" . "(5%(B")
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("i" . "(5&(B")
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("ii" . "(5'(B")
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("I" . "(5'(B")
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("u" . "(5((B")
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("uu" . "(5)(B")
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("U" . "(5)(B")
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("R^i" . "(5*(B")
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("R^I" . "(5*i(B")
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("L^i" . "(5&i(B")
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("L^I" . "(5'i(B")
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("E" . "(5+(B") ; For transcription of non-Devanagari Languages.
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("e" . "(5,(B")
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("ai" . "(5-(B")
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;; ("e.c" . "(5.(B") ; Candra E
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("O" . "(5/(B") ; For transcription of non-Devanagari Languages.
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("o" . "(50(B")
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("au" . "(51(B")
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;; ("o.c" . "(52(B") ; Candra O
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("M" . "(5$(B")
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("H" . "(5#(B")
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("AUM" . "(5!i(B")
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("OM" . "(5!i(B")
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(".r" . "(5Oh(B")
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(".n" . "(5"(B")
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(".N" . "(5!(B")
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(".h" . "(5h(B") ; Halant
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(".." . "(5j(B")
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(".a" . "(5ji(B") ; Avagrah
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("0" . "(5q(B")
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("1" . "(5r(B")
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("2" . "(5s(B")
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("3" . "(5t(B")
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("4" . "(5u(B")
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("5" . "(5v(B")
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("6" . "(5w(B")
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("7" . "(5x(B")
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("8" . "(5y(B")
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("9" . "(5z(B")
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))
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;; Regular expression matching single Indian character represented
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;; by ITRANS.
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(defvar indian-itrans-regexp
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(let ((consonant "\\([cs]hh?\\)\\|[kgjTDnpbyr]h?\\|\\(N\\^?\\)\\|\\(jN\\)\\|[mvqKGzfs]\\|\\(ld?\\)\\|\\(ksh\\)\\|\\(GY\\)\\|\\(\\.Dh?\\)")
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(vowel "\\(a[aiu]\\)\\|\\(ii\\)\\|\\(uu\\)\\|\\([RL]\\^[iI]\\)\\|[AIEOeoaiu]")
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(misc "[MH0-9]\\|\\(AUM\\)\\|\\(OM\\)\\|\\(\\.[rnNh\\.a]\\)")
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(lpre "\\(") (rpre "\\)") (orre "\\|"))
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(concat lpre misc rpre orre
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lpre lpre consonant rpre "?" lpre vowel rpre rpre orre
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lpre consonant rpre )))
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;;
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;; Regular expression matching single ITRANS unit for IS 13194 characters.
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;;
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(defvar itrans-indian-regexp
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(let ((vowel "[(5$(B-(52(B]")
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(consonant "[(53(B-(5X(B]")
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(matra "[(5Z(B-(5g(B]")
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(misc "[(5q(B-(5z(B]")
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(lpre "\\(") (rpre "\\)") (orre "\\|"))
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(concat misc orre
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lpre consonant matra "?" rpre orre
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vowel)))
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;;
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;; IS13194 - ITRANS conversion table for string matching above regexp.
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;;
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(defvar indian-itrans-alist
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(let ((cl indian-itrans-consonant-alist)
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(ml indian-itrans-other-letters-alist) rules)
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(while cl
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(let ((vl indian-itrans-vowel-sign-alist))
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(while vl
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(setq rules
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(cons (cons (concat (car (car cl)) (car (car vl)))
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(concat (cdr (car cl)) (cdr (car vl))))
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rules))
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(setq vl (cdr vl))))
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(setq cl (cdr cl)))
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(while ml
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(setq rules (cons (cons (car (car ml))
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(cdr (car ml)))
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rules))
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(setq ml (cdr ml)))
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rules))
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;;
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;; Utility program to convert from ITRANS to IS 13194 in specified region.
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;;
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(defun indian-decode-itrans-region (from to)
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"Convert `ITRANS' mnemonics of the current region to Indian characters.
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When called from a program, expects two arguments,
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positions (integers or markers) specifying the stretch of the region."
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(interactive "r")
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(save-restriction
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(narrow-to-region from to)
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(goto-char (point-min))
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(while (re-search-forward indian-itrans-regexp nil t)
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(let* ((itrans (buffer-substring (match-beginning 0) (match-end 0)))
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(ch (cdr (assoc itrans indian-itrans-alist))))
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(if ch
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(progn
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(delete-region (match-beginning 0) (match-end 0))
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(insert ch)))))
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(goto-char (point-min))
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(while (re-search-forward "\\((5h(B\\)[^\\c0]" nil t)
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(delete-region (match-beginning 1) (match-end 1)))))
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;;
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;; Utility program to convert from IS 13194 to ITRANS in specified region.
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;;
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(defun indian-encode-itrans-region (from to)
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"Convert indian region to ITRANS mnemonics."
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(interactive "r")
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(save-restriction
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(narrow-to-region from to)
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(goto-char (point-min))
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(while (re-search-forward itrans-indian-regexp nil t)
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(let* ((indian (buffer-substring (match-beginning 0) (match-end 0)))
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(ch (car (rassoc indian indian-itrans-alist))))
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(if ch
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(progn
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(delete-region (match-beginning 0) (match-end 0))
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(insert ch)))))
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(goto-char (point-min))))
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;;; indian.el ends here
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