-;;; indian.el --- Indian languages support -*- coding: iso-2022-7bit; -*-
-
-;; Copyright (C) 1997, 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007
-;; Free Software Foundation, Inc.
-;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
-;; National Institute of Advanced Industrial Science and Technology (AIST)
-;; Registration Number H14PRO021
-
-;; Maintainer: 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 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; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
-
-;;; Commentary:
-
-;; This file defines in-is13194 coding system and relationship between
-;; indian-glyph character-set and various CDAC fonts.
-
-;;; Code:
-
-(make-coding-system
- 'in-is13194 2 ?D
- "8-bit encoding for ASCII (MSB=0) and IS13194-Devanagari (MSB=1)."
- '(ascii indian-is13194 nil nil
- nil ascii-eol)
- `((safe-chars . ,(let ((table (make-char-table 'safe-chars nil)))
- (set-char-table-range table 'indian-is13194 t)
- (dotimes (i 127)
- (aset table i t)
- (aset table (decode-char 'ucs (+ #x900 i)) t))
- table))
- (post-read-conversion . in-is13194-post-read-conversion)
- (pre-write-conversion . in-is13194-pre-write-conversion)))
-
-(define-coding-system-alias 'devanagari 'in-is13194)
-
-(defvar indian-font-foundry 'cdac
- "Font foundry for Indian characters.
-Currently supported foundries are `cdac' and `akruti'.")
-
-(defvar indian-script-language-alist
- '((devanagari (hindi sanskrit) nil)
- (bengali (bengali assamese) nil)
- (gurmukhi (punjabi) nil)
- (gujarati (gujarati) nil)
- (oriya (oriya) nil)
- (tamil (tamil) nil)
- (telugu (telugu) nil)
- (kannada (kannada) nil)
- (malayalam (malayalam) nil))
- "Alist of Indian scripts vs the corresponding language list and font foundry.
-Each element has this form:
-
- (SCRIPT LANGUAGE-LIST FONT-FOUNDRY)
-
-SCRIPT is one of Indian script names.
-
-LANGUAGE-LIST is a list of Indian langauge names SCRIPT is used for.
-The list is in the priority order.
-
-FONT-FOUNDRY is a font foundry representing a group of Indian
-fonts. If the value is nil, the value of `indian-font-foundry'
-is used.")
-
-(defconst indian-font-char-index-table
- '( ; for which language(s)
- ;; CDAC fonts
- (#x0000 . cdac:dv-ttsurekh) ; hindi, etc
- (#x0100 . cdac:sd-ttsurekh) ; sanskrit
- (#x0200 . cdac:bn-ttdurga) ; bengali
- (#x0300 . cdac:tm-ttvalluvar) ; tamil
- (#x0400 . cdac:tl-tthemalatha) ; telugu
- (#x0500 . cdac:as-ttdurga) ; assamese
- (#x0600 . cdac:or-ttsarala) ; oriya
- (#x0700 . cdac:kn-ttuma) ; kannada
- (#x0800 . cdac:ml-ttkarthika) ; malayalam
- (#x0900 . cdac:gj-ttavantika) ; gujarati
- (#x0A00 . cdac:pn-ttamar) ; punjabi
-
- ;; AKRUTI fonts
- (#x0B00 . akruti:dev) ; hindi, etc
- (#x0C00 . akruti:bng) ; bengali
- (#x0D00 . akruti:pnj) ; punjabi
- (#x0E00 . akruti:guj) ; gujarati
- (#x0F00 . akruti:ori) ; oriya
- (#x1000 . akruti:tml) ; tamil
- (#x1100 . akruti:tlg) ; telugu
- (#x1200 . akruti:knd) ; kannada
- (#x1300 . akruti:mal) ; malayalam
- )
- "Alist of indices of `indian-glyph' character vs Indian font identifiers.
-Each element has this form: (INDEX . FONT-IDENTIFIER)
-
-INDEX is an index number of the first character in the charset
-`indian-glyph' assigned for glyphs in the font specified by
-FONT-IDENTIFIER. Currently FONT-IDENTIFIERs are defined for CDAC
-and AKRUTI font groups.")
-
-(defun indian-font-char (index font-identifier)
- "Return character of charset `indian-glyph' made from glyph index INDEX.
-FONT-IDENTIFIER is an identifier of an Indian font listed in the
-variable `indian-font-char-index-table'. It specifies which
-font INDEX is for."
- (if (or (< index 0) (> index 255))
- (error "Invalid glyph index: %d" index))
- (let ((start (car (rassq font-identifier indian-font-char-index-table))))
- (if (not start)
- (error "Unknown font identifier: %s" font-identifier))
- (setq index (+ start index))
- (make-char 'indian-glyph (+ (/ index 96) 32) (+ (% index 96) 32))))
-
-;; Return a range of characters (cons of min and max character) of the
-;; charset `indian-glyph' for displaying SCRIPT in LANGUAGE by a font
-;; of FOUNDRY.
-
-(defun indian-font-char-range (font-identifier)
- (cons (indian-font-char 0 font-identifier)
- (indian-font-char 255 font-identifier)))
-
-(defvar indian-script-table
- '[
- devanagari
- sanskrit
- bengali
- tamil
- telugu
- assamese
- oriya
- kannada
- malayalam
- gujarati
- punjabi
- ]
- "Vector of Indian script names.")
-
-(let ((len (length indian-script-table))
- (i 0))
- (while (< i len)
- (put (aref indian-script-table i) 'indian-glyph-code-offset (* 256 i))
- (setq i (1+ i))))
-
-(defvar indian-default-script 'devanagari
- "Default script for Indian languages.
-Each Indian language environment sets this value
-to one of `indian-script-table' (which see).
-The default value is `devanagari'.")
-
-(define-ccl-program ccl-encode-indian-glyph-font
- `(0
- ;; Shorten (r1 = (((((r1 - 32) * 96) + r2) - 32) % 256))
- (r1 = ((((r1 * 96) + r2) - ,(+ (* 32 96) 32)) % 256))))
-
-(setq font-ccl-encoder-alist
- (cons (cons "-CDAC" 'ccl-encode-indian-glyph-font)
- font-ccl-encoder-alist))
-
-(setq font-ccl-encoder-alist
- (cons (cons "-AKRUTI" 'ccl-encode-indian-glyph-font)
- font-ccl-encoder-alist))
-
-(provide 'indian)
-
-;;; arch-tag: 83aa8fc7-7ee2-4364-a6e5-498f5e3b8c2f
-;;; indian.el ends here
+;;; indian.el --- Indian languages support -*- coding: utf-8; -*-
+
+;; Copyright (C) 1997, 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+;; Free Software Foundation, Inc.
+;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+;; 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 . "dev-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
+ '(("V" . "[\u0904-\u0914\u0960-\u0961\u0972]") ; independent vowel
+ ("C" . "[\u0915-\u0939]") ; consonant
+ ("R" . "\u0930") ; RA
+ ("n" . "\u093C") ; NUKTA
+ ("H" . "\u094D") ; HALANT
+ ("m" . "\u093F") ; vowel sign (pre)
+ ("u" . "[\u0945-\u0948\u0955]") ; vowel sign (above)
+ ("b" . "[\u0941-\u0944\u0962-\u0963]") ; vowel sign (below)
+ ("p" . "[\u093E\u0940\u0949-\u094C]") ; vowel sign (post)
+ ("A" . "[\u0900-\u0902\u0953-\u0954]") ; vowel modifier (above)
+ ("a" . "\u0903") ; vowel modifier (post)
+ ("S" . "\u0951") ; stress sign (above)
+ ("s" . "\u0952") ; stress sign (below)
+ ("N" . "\u200C") ; ZWNJ
+ ("J" . "\u200D") ; ZWJ
+ ("X" . "[\u0900-\u097F]")))) ; all coverage
+ (indian-compose-regexp
+ (concat
+ ;; syllables with an independent vowel, or
+ "\\(?:RH\\)?Vn?m?b?u?p?n?A?s?S?a?\\|"
+ ;; consonant-based syllables, or
+ "\\(?:Cn?J?HJ?\\)*Cn?\\(?:H[NJ]?\\|m?b?u?p?n?A?s?S?a?\\)\\|"
+ ;; special consonant form, or
+ "JHR\\|"
+ ;; any other singleton characters
+ "X")
+ table))
+ "Regexp matching a composable sequence of Devanagari characters.")
+
+(defconst tamil-composable-pattern
+ (concat
+ "\\([அ-ஔ]\\)\\|"
+ "[ஂஃ]\\|" ;; vowel modifier considered independent
+ "\\(\\(?:\\(?:க்ஷ\\)\\|[க-ஹ]\\)[்ா-ௌ]?\\)\\|"
+ "\\(ஷ்ரீ\\)")
+ "Regexp matching a composable sequence of Tamil characters.")
+
+(defconst kannada-composable-pattern
+ (concat
+ "\\([ಂ-ಔೠಌ]\\)\\|[ಃ]"
+ "\\|\\("
+ "\\(?:\\(?:[ಕ-ಹ]್\\)?\\(?:[ಕ-ಹ]್\\)?\\(?:[ಕ-ಹ]್\\)?[ಕ-ಹ]್\\)?"
+ "[ಕ-ಹ]\\(?:್\\|[ಾ-್ೕೃ]?\\)?"
+ "\\)")
+ "Regexp matching a composable sequence of Kannada characters.")
+
+(defconst malayalam-composable-pattern
+ (let ((table
+ '(("V" . "[\u0D05-\u0D14\u0D60-\u0D61]") ; independent vowel
+ ("C" . "[\u0D15-\u0D39]") ; consonant
+ ("m" . "[\u0D46-\u0D48\u0D4A-\u0D4C]") ; prebase matra
+ ("p" . "[\u0D3E-\u0D44\u0D57]") ; postbase matra
+ ("b" . "[\u0D62-\u0D63]") ; belowbase matra
+ ("a" . "[\u0D02-\u0D03]") ; abovebase sign
+ ("H" . "\u0D4D") ; virama sign
+ ("N" . "\u200C") ; ZWNJ
+ ("J" . "\u200D") ; ZWJ
+ ("X" . "[\u0D00-\u0D7F]")))) ; all coverage
+ (indian-compose-regexp
+ (concat
+ ;; syllables with an independent vowel, or
+ "V\\(?:J?HC\\)?m?b?p?a?\\|"
+ ;; consonant-based syllables, or
+ "\\(?:CJ?HJ?\\)\\{0,4\\}C\\(?:H[NJ]?\\|m?b?p?a?\\)\\|"
+ ;; special consonant form, or
+ "JHC\\|"
+ ;; any other singleton characters
+ "X")
+ table))
+ "Regexp matching a composable sequence of Malayalam characters.")
+
+(let ((script-regexp-alist
+ `((devanagari . ,devanagari-composable-pattern)
+ (bengali . "[\x980-\x9FF\x200C\x200D]+")
+ (gurmukhi . "[\xA00-\xA7F\x200C\x200D]+")
+ (gujarati . "[\xA80-\xAFF\x200C\x200D]+")
+ (oriya . "[\xB00-\xB7F\x200C\x200D]+")
+ (tamil . "[\xB80-\xBFF\x200C\x200D]+")
+ (telugu . "[\xC00-\xC7F\x200C\x200D]+")
+ (kannada . "[\xC80-\xCFF\x200C\x200D]+")
+ (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)
+
+;; arch-tag: 83aa8fc7-7ee2-4364-a6e5-498f5e3b8c2f
+;;; indian.el ends here
HCoop / bpt / emacs.git / blobdiff