1;;; indian.el --- Indian languages support -*- coding: iso-2022-7bit; -*- 2 3;; Copyright (C) 1997, 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007 4;; Free Software Foundation, Inc. 5;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 6;; National Institute of Advanced Industrial Science and Technology (AIST) 7;; Registration Number H14PRO021 8 9;; Maintainer: KAWABATA, Taichi <kawabata@m17n.org> 10;; Keywords: multilingual, i18n, Indian 11 12;; This file is part of GNU Emacs. 13 14;; GNU Emacs is free software; you can redistribute it and/or modify 15;; it under the terms of the GNU General Public License as published by 16;; the Free Software Foundation; either version 2, or (at your option) 17;; any later version. 18 19;; GNU Emacs is distributed in the hope that it will be useful, 20;; but WITHOUT ANY WARRANTY; without even the implied warranty of 21;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22;; GNU General Public License for more details. 23 24;; You should have received a copy of the GNU General Public License 25;; along with GNU Emacs; see the file COPYING. If not, write to the 26;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 27;; Boston, MA 02110-1301, USA. 28 29;;; Commentary: 30 31;; This file defines in-is13194 coding system and relationship between 32;; indian-glyph character-set and various CDAC fonts. 33 34;;; Code: 35 36(make-coding-system 37 'in-is13194 2 ?D 38 "8-bit encoding for ASCII (MSB=0) and IS13194-Devanagari (MSB=1)." 39 '(ascii indian-is13194 nil nil 40 nil ascii-eol) 41 `((safe-chars . ,(let ((table (make-char-table 'safe-chars nil))) 42 (set-char-table-range table 'indian-is13194 t) 43 (dotimes (i 127) 44 (aset table i t) 45 (aset table (decode-char 'ucs (+ #x900 i)) t)) 46 table)) 47 (post-read-conversion . in-is13194-post-read-conversion) 48 (pre-write-conversion . in-is13194-pre-write-conversion))) 49 50(define-coding-system-alias 'devanagari 'in-is13194) 51 52(defvar indian-font-foundry 'cdac 53 "Font foundry for Indian characters. 54Currently supported foundries are `cdac' and `akruti'.") 55 56(defvar indian-script-language-alist 57 '((devanagari (hindi sanskrit) nil) 58 (bengali (bengali assamese) nil) 59 (gurmukhi (punjabi) nil) 60 (gujarati (gujarati) nil) 61 (oriya (oriya) nil) 62 (tamil (tamil) nil) 63 (telugu (telugu) nil) 64 (kannada (kannada) nil) 65 (malayalam (malayalam) nil)) 66 "Alist of Indian scripts vs the corresponding language list and font foundry. 67Each element has this form: 68 69 (SCRIPT LANGUAGE-LIST FONT-FOUNDRY) 70 71SCRIPT is one of Indian script names. 72 73LANGUAGE-LIST is a list of Indian langauge names SCRIPT is used for. 74The list is in the priority order. 75 76FONT-FOUNDRY is a font foundry representing a group of Indian 77fonts. If the value is nil, the value of `indian-font-foundry' 78is used.") 79 80(defconst indian-font-char-index-table 81 '( ; for which language(s) 82 ;; CDAC fonts 83 (#x0000 . cdac:dv-ttsurekh) ; hindi, etc 84 (#x0100 . cdac:sd-ttsurekh) ; sanskrit 85 (#x0200 . cdac:bn-ttdurga) ; bengali 86 (#x0300 . cdac:tm-ttvalluvar) ; tamil 87 (#x0400 . cdac:tl-tthemalatha) ; telugu 88 (#x0500 . cdac:as-ttdurga) ; assamese 89 (#x0600 . cdac:or-ttsarala) ; oriya 90 (#x0700 . cdac:kn-ttuma) ; kannada 91 (#x0800 . cdac:ml-ttkarthika) ; malayalam 92 (#x0900 . cdac:gj-ttavantika) ; gujarati 93 (#x0A00 . cdac:pn-ttamar) ; punjabi 94 95 ;; AKRUTI fonts 96 (#x0B00 . akruti:dev) ; hindi, etc 97 (#x0C00 . akruti:bng) ; bengali 98 (#x0D00 . akruti:pnj) ; punjabi 99 (#x0E00 . akruti:guj) ; gujarati 100 (#x0F00 . akruti:ori) ; oriya 101 (#x1000 . akruti:tml) ; tamil 102 (#x1100 . akruti:tlg) ; telugu 103 (#x1200 . akruti:knd) ; kannada 104 (#x1300 . akruti:mal) ; malayalam 105 ) 106 "Alist of indices of `indian-glyph' character vs Indian font identifiers. 107Each element has this form: (INDEX . FONT-IDENTIFIER) 108 109INDEX is an index number of the first character in the charset 110`indian-glyph' assigned for glyphs in the font specified by 111FONT-IDENTIFIER. Currently FONT-IDENTIFIERs are defined for CDAC 112and AKRUTI font groups.") 113 114(defun indian-font-char (index font-identifier) 115 "Return character of charset `indian-glyph' made from glyph index INDEX. 116FONT-IDENTIFIER is an identifier of an Indian font listed in the 117variable `indian-font-char-index-table'. It specifies which 118font INDEX is for." 119 (if (or (< index 0) (> index 255)) 120 (error "Invalid glyph index: %d" index)) 121 (let ((start (car (rassq font-identifier indian-font-char-index-table)))) 122 (if (not start) 123 (error "Unknown font identifier: %s" font-identifier)) 124 (setq index (+ start index)) 125 (make-char 'indian-glyph (+ (/ index 96) 32) (+ (% index 96) 32)))) 126 127;; Return a range of characters (cons of min and max character) of the 128;; charset `indian-glyph' for displaying SCRIPT in LANGUAGE by a font 129;; of FOUNDRY. 130 131(defun indian-font-char-range (font-identifier) 132 (cons (indian-font-char 0 font-identifier) 133 (indian-font-char 255 font-identifier))) 134 135(defvar indian-script-table 136 '[ 137 devanagari 138 sanskrit 139 bengali 140 tamil 141 telugu 142 assamese 143 oriya 144 kannada 145 malayalam 146 gujarati 147 punjabi 148 ] 149 "Vector of Indian script names.") 150 151(let ((len (length indian-script-table)) 152 (i 0)) 153 (while (< i len) 154 (put (aref indian-script-table i) 'indian-glyph-code-offset (* 256 i)) 155 (setq i (1+ i)))) 156 157(defvar indian-default-script 'devanagari 158 "Default script for Indian languages. 159Each Indian language environment sets this value 160to one of `indian-script-table' (which see). 161The default value is `devanagari'.") 162 163(define-ccl-program ccl-encode-indian-glyph-font 164 `(0 165 ;; Shorten (r1 = (((((r1 - 32) * 96) + r2) - 32) % 256)) 166 (r1 = ((((r1 * 96) + r2) - ,(+ (* 32 96) 32)) % 256)))) 167 168(setq font-ccl-encoder-alist 169 (cons (cons "-CDAC" 'ccl-encode-indian-glyph-font) 170 font-ccl-encoder-alist)) 171 172(setq font-ccl-encoder-alist 173 (cons (cons "-AKRUTI" 'ccl-encode-indian-glyph-font) 174 font-ccl-encoder-alist)) 175 176(provide 'indian) 177 178;;; arch-tag: 83aa8fc7-7ee2-4364-a6e5-498f5e3b8c2f 179;;; indian.el ends here 180