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665 lines
21 KiB
EmacsLisp
665 lines
21 KiB
EmacsLisp
;;; devan-util.el --- Support for composing Devanagari characters -*-coding: iso-2022-7bit;-*-
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;; Copyright (C) 1997, 1998, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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;; Free Software Foundation, Inc.
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;; Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
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;; 2007, 2008
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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: KAWABATA, Taichi <kawabata@m17n.org>
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;; Keywords: multilingual, Devanagari
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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, 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., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;; Created: Feb. 17. 2001
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;;; Commentary:
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;; This file provides character(Unicode) to glyph(CDAC) conversion and
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;; composition of Devanagari script characters.
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;;; Code:
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;; Devanagari Composable Pattern
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;; C .. Consonants
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;; V .. Vowel
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;; H .. Halant
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;; M .. Matra
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;; V .. Vowel
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;; A .. Anuswar
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;; D .. Chandrabindu
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;; (N .. Zerowidth Non Joiner)
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;; (J .. Zerowidth Joiner. )
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;; 1. vowel
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;; V(A/D)?
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;; 2. syllable : maximum of 5 consecutive consonants. (e.g. kartsnya)
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;; ((CH)?(CH)?(CH)?CH)?C(H|M?(A|D)?)?
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(defconst devanagari-consonant
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"[$,15U(B-$,15y68(B-$,16?(B]")
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;;("$,16B(B" . nil)
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;;("$,16A(B" . nil)
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;;("$,16C(B" . nil)
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(defconst devanagari-composable-pattern
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(concat
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"\\([$,15E(B-$,15T6@6A(B][$,15A5B(B]?\\)\\|[$,15C6D(B]"
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"\\|\\("
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"\\(?:\\(?:[$,15U(B-$,15y68(B-$,16?(B]$,16-(B\\)?\\(?:[$,15U(B-$,15y68(B-$,16?(B]$,16-(B\\)?\\(?:[$,15U(B-$,15y68(B-$,16?(B]$,16-(B\\)?[$,15U(B-$,15y68(B-$,16?(B]$,16-(B\\)?"
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"[$,15U(B-$,15y68(B-$,16?(B]\\(?:$,16-(B\\|[$,15~(B-$,16-6B6C(B]?[$,15B5A(B]?\\)?"
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"\\)")
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"Regexp matching a composable sequence of Devanagari characters.")
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(dolist (range '((#x0903 . #x0903)
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(#x0905 . #x0939)
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(#x0958 . #x0961)))
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(set-char-table-range indian-composable-pattern range
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devanagari-composable-pattern))
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;;;###autoload
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(defun devanagari-compose-region (from to)
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(interactive "r")
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(save-excursion
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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 devanagari-composable-pattern nil t)
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(devanagari-compose-syllable-region (match-beginning 0)
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(match-end 0))))))
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(defun devanagari-compose-string (string)
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(with-temp-buffer
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(insert (decompose-string string))
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(devanagari-compose-region (point-min) (point-max))
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(buffer-string)))
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;;;###autoload
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(defun devanagari-post-read-conversion (len)
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(save-excursion
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(save-restriction
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(let ((buffer-modified-p (buffer-modified-p)))
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(narrow-to-region (point) (+ (point) len))
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(devanagari-compose-region (point-min) (point-max))
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(set-buffer-modified-p buffer-modified-p)
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(- (point-max) (point-min))))))
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(defun devanagari-regexp-of-hashtbl-keys (hashtbl)
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"Return a regular expression that matches all keys in hashtable HASHTBL."
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(let ((max-specpdl-size 1000))
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(regexp-opt
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(sort
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(let (dummy)
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(maphash (function (lambda (key val) (setq dummy (cons key dummy)))) hashtbl)
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dummy)
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(function (lambda (x y) (> (length x) (length y))))))))
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;;;###autoload
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(defun devanagari-composition-function (pos &optional string)
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"Compose Devanagari characters after the position POS.
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If STRING is not nil, it is a string, and POS is an index to the string.
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In this case, compose characters after POS of the string."
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(if string
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(if auto-compose-current-font
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(if (eq (string-match "[$,15@(B-$,16_(B]+" pos) pos)
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(or (font-shape-text 0 (match-end 0) auto-compose-current-font
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string)
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pos)))
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(goto-char pos)
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(if auto-compose-current-font
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(if (looking-at "[$,15@(B-$,16_(B]+")
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(or (font-shape-text pos (match-end 0) auto-compose-current-font)
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pos)
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(if (looking-at devanagari-composable-pattern)
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(prog1 (match-end 0)
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(devanagari-compose-syllable-region pos (match-end 0))))))))
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;; Notes on conversion steps.
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;; 1. chars to glyphs
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;;
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;; Rules will not be applied to the halant appeared at the end of the
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;; text. Also, the preceding/following "r" will be treated as special case.
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;; 2. glyphs reordering.
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;;
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;; The glyphs are split by halant, and each glyph groups are
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;; re-ordered in the following order.
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;;
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;; Note that `consonant-glyph' mentioned here does not contain the
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;; vertical bar (right modifier) attached at the right of the
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;; consonant.
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;;
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;; If the glyph-group contains right modifier,
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;; (1) consonant-glyphs/vowels, with nukta sign
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;; (2) spacing
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;; (3) right modifier (may be matra)
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;; (4) top matra
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;; (5) preceding "r"
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;; (6) anuswar
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;; (7) following "r"
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;; (8) bottom matra or halant.
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;;
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;; Otherwise,
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;; (1) consonant-glyph/vowels, with nukta sign
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;; (3) left matra
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;; (4) top matra
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;; (5) preceding "r"
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;; (6) anuswar
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;; (7) following "r"
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;; (8) bottom matra or halant.
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;; (2) spacing
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;; 3. glyph to glyph
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;;
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;; For better display, some glyph display would be tuned.
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;; 4. Composition.
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;;
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;; left modifiers will be attached at the left.
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;; others will be attached right.
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;; Problem::
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;; Can we generalize this methods to other Indian scripts?
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(defvar dev-char-glyph
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'(("$,15E(B" . "$,4 K(B")
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("$,15F(B" . "$,4 K")(B")
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("$,15~(B" . "$,4")(B")
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("$,15G(B" . "$,4 \(B")
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("$,15(B" . "$,4"*(B")
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("$,155A(B" . "$,4"*(B\$,4"&(B")
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("$,15H(B" . "$,4 \"'(B")
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("$,15H5A(B" . "$,4 \"'"&(B")
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("$,16 (B" . "$,4"2(B")
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("$,16 5A(B" . "$,4"2"&(B")
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("$,15I(B" . "$,4 ](B")
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("$,16!(B" . "$,4"6(B")
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("$,15J(B" . "$,4 ^"P(B")
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("$,16"(B" . "$,4":(B")
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("$,15K(B" . "$,4 `"Q(B")
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("$,16#(B" . "$,4">(B")
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;;("$,15L(B" . nil) ; not implemented.
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("$,16$(B" . "$,4"?(B")
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("$,15M(B" . "$,4 b"L(B")
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("$,15M5A(B" . "$,4 b"$(B")
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("$,15M5B(B" . "$,4 b"$(B")
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("$,16%(B" . "\$,4"L(B")
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("$,15N(B" . "$,4 b"@(B")
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("$,15N5A(B" . "$,4 b"@"&(B")
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("$,16&(B" . "\$,4"@(B")
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("$,16&5A(B" . "\$,4"@(B\$,4"&(B")
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("$,15O(B" . "$,4 b(B")
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("$,16'(B" . "\$,4"D(B")
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("$,16'5A(B" . "\$,4"D(B\$,4"&(B")
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("$,15P(B" . "$,4 b"D(B")
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("$,15P5A(B" . "$,4 b"D"&(B")
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("$,16((B" . "\$,4"H(B")
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("$,16(5A(B" . "\$,4"H(B\$,4"&(B")
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("$,15Q(B" . "$,4 K")"L(B") ;; special rule for reodering.
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("$,15Q5A(B" . "$,4 K")"$(B")
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("$,15Q5B(B" . "$,4 K")"$(B")
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("$,16)(B" . "\$,4")"L(B")
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("$,16)5A(B" . "\$,4")"$(B")
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("$,16)5B(B" . "\$,4")"$(B")
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("$,15R(B" . "$,4 K")"@(B")
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("$,15R5A(B" . "$,4 K")"@"&(B")
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("$,16*(B" . "\$,4")"@(B")
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("$,16*5A(B" . "\$,4")"@"&(B")
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("$,15S(B" . "$,4 K")"D(B")
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("$,15S5A(B" . "$,4 K")"D"&(B")
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("$,16+(B" . "\$,4")"D(B")
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("$,16+5A(B" . "\$,4")"D"&(B")
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("$,15T(B" . "$,4 K")"H(B")
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("$,15T5A(B" . "$,4 K")"H"&(B")
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("$,16,(B" . "\$,4")"H(B")
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("$,16,5A(B" . "\$,4")"H"&(B")
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("$,16@(B" . "$,4 a"Q(B")
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;;("$,16B(B" . nil)
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;;("$,16A(B" . nil)
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;;("$,16C(B" . nil)
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;; GRUTTALS
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("$,15U(B" . "$,4 e"R(B")
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("$,15U6-(B" . "$,4 c(B")
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("$,15U6-5p(B" . "$,4 g"R(B")
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("$,15U6-5d(B" . "$,4 h"R(B")
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("$,15U6-5w(B" . "$,4 i")(B")
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("$,15U6-5w6-(B" . "$,4 i(B")
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("$,15V(B" . "$,4 j")(B")
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("$,15V6-(B" . "$,4 j(B")
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("$,15V6-5p(B" . "$,4 l")(B")
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("$,15V6-5p6-(B" . "$,4 l(B")
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("$,15W(B" . "$,4 m")(B")
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("$,15W6-(B" . "$,4 m(B")
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("$,15W6-5p(B" . "$,4 o")(B")
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("$,15W6-5p6-(B" . "$,4 o(B")
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("$,15X(B" . "$,4 p")(B")
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("$,15X6-(B" . "$,4 p(B")
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("$,15X6-5p(B" . "$,4 q")(B")
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("$,15X6-5p6-(B" . "$,4 q(B")
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("$,15Y(B" . "$,4 r"S(B")
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;; PALATALS
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("$,15Z(B" . "$,4 s")(B")
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("$,15Z6-(B" . "$,4 s(B")
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("$,15Z6-5p(B" . "$,4 t")(B")
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("$,15Z6-5p6-(B" . "$,4 t(B")
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("$,15[(B" . "$,4 u"T(B")
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("$,15\(B" . "$,4 v")(B")
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("$,15\6-(B" . "$,4 v(B")
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("$,15\6-5p(B" . "$,4 x")(B")
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("$,15\6-5p6-(B" . "$,4 x(B")
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("$,15\6-5^(B" . "$,4 y")(B")
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("$,15\6-5^6-(B" . "$,4 y(B")
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("$,15](B" . "$,4 z")(B")
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("$,15]6-(B" . "$,4 z(B")
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("$,15]6-5p(B" . "$,4 {")(B")
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("$,15]6-5p6-(B" . "$,4 {(B")
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("$,15^(B" . "$,4 |")(B")
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("$,15^6-(B" . "$,4 |(B")
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;; CEREBRALS
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("$,15_(B" . "$,4 }"U(B")
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("$,15_6-5_(B" . "$,4 ~"U(B")
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("$,15_6-5`(B" . "$,4 "U(B")
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("$,15`(B" . "$,4! "V(B")
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("$,15`6-5`(B" . "$,4!!"V(B")
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("$,15a(B" . "$,4!""W(B")
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("$,15a6-5a(B" . "$,4!$"W(B")
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("$,15a6-5b(B" . "$,4!%"W(B")
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("$,15b(B" . "$,4!&"X(B")
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("$,15c(B" . "$,4!(")(B")
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("$,15c6-(B" . "$,4!((B")
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;; DENTALS
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("$,15d(B" . "$,4!)")(B")
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("$,15d6-(B" . "$,4!)(B")
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("$,15d6-5p(B" . "$,4!*")(B")
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("$,15d6-5p6-(B" . "$,4!*(B")
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("$,15d6-5d(B" . "$,4!+")(B")
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("$,15d6-5d6-(B" . "$,4!+(B")
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("$,15e(B" . "$,4!,")(B")
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("$,15e6-(B" . "$,4!,(B")
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("$,15e6-5p(B" . "$,4!-")(B")
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("$,15e6-5p6-(B" . "$,4!-(B")
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("$,15f(B" . "$,4!."Y(B")
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("$,15f6#(B" . "$,4!/"Y(B")
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("$,15f6-5p(B" . "$,4!0"Y(B")
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("$,15f6-5f(B" . "$,4!1"Y(B")
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("$,15f6-5g(B" . "$,4!2"Y(B")
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("$,15f6-5n(B" . "$,4!3(B")
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("$,15f6-5o(B" . "$,4!4(B")
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("$,15f6-5u(B" . "$,4!5"Y(B")
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("$,15g(B" . "$,4!6")(B")
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("$,15g6-(B" . "$,4!6(B")
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("$,15g6-5p(B" . "$,4!7")(B")
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("$,15g6-5p6-(B" . "$,4!7(B")
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("$,15h(B" . "$,4!8")(B")
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("$,15h6-(B" . "$,4!8(B")
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("$,15h6-5p(B" . "$,4!9")(B")
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("$,15h6-5p6-(B" . "$,4!9")(B")
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("$,15h6-5h(B" . "$,4!:")(B")
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("$,15h6-5h6-(B" . "$,4!:(B")
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("$,15i(B" . "$,4!8"#")(B")
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;; LABIALS
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("$,15j(B" . "$,4!;")(B")
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("$,15j6-(B" . "$,4!;(B")
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("$,15j6-5p(B" . "$,4!<")(B")
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("$,15j6-5p6-(B" . "$,4!<(B")
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("$,15k(B" . "$,4!a"[(B")
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("$,15k6-(B" . "$,4!=(B")
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("$,15k6-5p(B" . "$,4!c"[(B")
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("$,15l(B" . "$,4!d")(B")
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("$,15l6-(B" . "$,4!d(B")
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("$,15l6-5p(B" . "$,4!e")(B")
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("$,15l6-5p6-(B" . "$,4!e(B")
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("$,15m(B" . "$,4!f")(B")
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("$,15m6-(B" . "$,4!f(B")
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("$,15m6-5p(B" . "$,4!g")(B")
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("$,15m6-5p6-(B" . "$,4!g(B")
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("$,15n(B" . "$,4!h")(B")
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("$,15n6-(B" . "$,4!h(B")
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("$,15n6-5p(B" . "$,4!i")(B")
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("$,15n6-5p6-(B" . "$,4!i(B")
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;; SEMIVOWELS
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("$,15o(B" . "$,4!j")(B")
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("$,15o6-(B" . "$,4!j(B")
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("$,15o6-5p(B" . "$,4!k")(B")
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("$,15o6-5p6-(B" . "$,4!k(B")
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("$,16-5o(B" . "$,4!l(B") ;; when every ohter lig. fails.
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("$,15p(B" . "$,4!n"W(B")
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;; ("$,15p6-(B" . "\$,4"'(B") ;; special case. only the topmost pos.
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("$,15q(B" . "$,4!n"#"W(B")
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("$,15q6-(B" . "$,4!m(B") ;; IS 13194 speical rule.
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("$,15p6!(B" . "$,4!o"[(B")
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("$,15p6"(B" . "$,4!p"\(B")
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("$,15r(B" . "$,4!q")(B")
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("$,15r6-(B" . "$,4!q(B")
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("$,15s(B" . "$,4!s(B")
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("$,15s6-(B" . "$,4!r(B")
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("$,15t(B" . "$,4!s"#(B")
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("$,15t6-(B" . "$,4!r"#(B")
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("$,15u(B" . "$,4!t")(B")
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("$,15u6-(B" . "$,4!t(B")
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("$,15u6-5p(B" . "$,4!u")(B")
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("$,15u6-5p6-(B" . "$,4!u(B")
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;; SIBILANTS
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("$,15v(B" . "$,4!v")(B")
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("$,15v6-(B" . "$,4!v(B")
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("$,15v6-5u(B" . "$,4!w")(B")
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("$,15v6-5u6-(B" . "$,4!w(B")
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("$,15v6-5p(B" . "$,4!x")(B")
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("$,15v6-5p6-(B" . "$,4!x(B")
|
||
|
||
("$,15w(B" . "$,4!y")(B")
|
||
("$,15w6-(B" . "$,4!y(B")
|
||
("$,15x(B" . "$,4!z")(B")
|
||
("$,15x6-(B" . "$,4!z(B")
|
||
("$,15x6-5p(B" . "$,4!{")(B")
|
||
("$,15x6-5p6-(B" . "$,4!{(B")
|
||
|
||
("$,15y(B" . "$,4!}(B")
|
||
("$,15y6-(B" . "$,4!|(B")
|
||
("$,15y6#(B" . "$,4!~(B")
|
||
("$,15y6-5p(B" . "$,4!(B")
|
||
("$,15y6-5n(B" . "$,4" (B")
|
||
("$,15y6-5o(B" . "$,4"!(B")
|
||
;; NUKTAS
|
||
("$,168(B" . "$,4 f"R"S(B")
|
||
("$,1686-(B" . "$,4 d(B")
|
||
("$,169(B" . "$,4 k")(B")
|
||
("$,1696-(B" . "$,4 k(B")
|
||
("$,16:(B" . "$,4 n")(B")
|
||
("$,16:6-(B" . "$,4 n(B")
|
||
("$,16;(B" . "$,4 w")(B")
|
||
("$,16;6-(B" . "$,4 w(B")
|
||
("$,16<(B" . "$,4!#"W(B")
|
||
("$,16=(B" . "$,4!'"X(B")
|
||
("$,16>(B" . "$,4!b"[(B")
|
||
("$,16>6-(B" . "$,4!>(B")
|
||
("$,16?(B" . "$,4!j"#")(B")
|
||
;; misc modifiers.
|
||
("$,15A(B" . "\$,4"$(B")
|
||
("$,15B(B" . "\$,4"&(B")
|
||
("$,15C(B" . "$,4 F(B")
|
||
("$,15|(B" . "$,4"#(B")
|
||
("$,15}(B" . "$,4 E(B")
|
||
("$,16-(B" . "$,4""(B")
|
||
("$,16-5p(B" . "$,4"%(B") ;; following "r"
|
||
;; ("$,160(B" . "$,4 D(B")
|
||
("$,16D(B" . "$,4 J(B")
|
||
;; ("$,16F(B" . "")
|
||
;; ("$,16G(B" . "")
|
||
;; ("$,16H(B" . "")
|
||
;; ("$,16I(B" . "")
|
||
;; ("$,16J(B" . "")
|
||
;; ("$,16K(B" . "")
|
||
;; ("$,16L(B" . "")
|
||
;; ("$,16M(B" . "")
|
||
;; ("$,16N(B" . "")
|
||
;; ("$,16O(B" . "")
|
||
)
|
||
"Devanagari characters to glyphs conversion table.
|
||
Default value contains only the basic rules. You may add your own
|
||
preferred rule from the sanskrit fonts." )
|
||
|
||
(defvar dev-char-glyph-hash
|
||
(let* ((hash (make-hash-table :test 'equal)))
|
||
(mapc (function (lambda (x) (puthash (car x) (cdr x) hash)))
|
||
dev-char-glyph)
|
||
hash))
|
||
|
||
(defvar dev-char-glyph-regexp
|
||
(devanagari-regexp-of-hashtbl-keys dev-char-glyph-hash))
|
||
|
||
;; glyph-to-glyph conversion table.
|
||
;; it is supposed that glyphs are ordered in
|
||
;; [consonant/nukta] - [matra/halant] - [preceding-r] - [anuswar].
|
||
|
||
(defvar dev-glyph-glyph
|
||
'(("\$,4"'(B\$,4"&(B" . "\$,4"((B")
|
||
("\$,4"'(B\$,4"$(B" . "\$,4"((B")
|
||
("$,4"*(B\$,4"&(B" . "$,4"+(B")
|
||
("$,4"*(B\$,4"'(B" . "$,4",(B")
|
||
("$,4"*(B\$,4"'(B\$,4"&(B" . "$,4"-(B")
|
||
("$,4"2(B\$,4"&(B" . "$,4"3(B")
|
||
("$,4"2(B\$,4"'(B" . "$,4"4(B")
|
||
("$,4"2(B\$,4"'(B\$,4"&(B" . "$,4"5(B")
|
||
("$,4"#(B\$,4"6(B" . "$,4"7(B")
|
||
("$,4"%(B\$,4"6(B" . "$,4"8(B")
|
||
;;("$,4"6(B" . "$,4"9(B")
|
||
("$,4"#(B\$,4":(B" . "$,4";(B")
|
||
("$,4"%(B\$,4":(B" . "$,4"<(B")
|
||
;;("$,4":(B" . "$,4"=(B")
|
||
("\$,4"@(B\$,4"&(B" . "\$,4"A(B")
|
||
("\$,4"@(B\$,4"'(B" . "\$,4"B(B")
|
||
("\$,4"@(B\$,4"'(B\$,4"&(B" . "\$,4"C(B")
|
||
("\$,4"D(B\$,4"&(B" . "\$,4"E(B")
|
||
("\$,4"D(B\$,4"'(B" . "\$,4"F(B")
|
||
("\$,4"D(B\$,4"'(B\$,4"&(B" . "\$,4"G(B")
|
||
("\$,4"H(B\$,4"&(B" . "\$,4"I(B")
|
||
("\$,4"H(B\$,4"'(B" . "\$,4"J(B")
|
||
("\$,4"H(B\$,4"'(B\$,4"&(B" . "\$,4"K(B")
|
||
("\$,4"L(B\$,4"&(B" . "\$,4"M(B")
|
||
("\$,4"L(B\$,4"'(B" . "\$,4"N(B")
|
||
("\$,4"L(B\$,4"'(B\$,4"&(B" . "\$,4"O(B")
|
||
))
|
||
(defvar dev-glyph-glyph-hash
|
||
(let* ((hash (make-hash-table :test 'equal)))
|
||
(mapc (function (lambda (x) (puthash (car x) (cdr x) hash)))
|
||
dev-glyph-glyph)
|
||
hash))
|
||
(defvar dev-glyph-glyph-regexp
|
||
(devanagari-regexp-of-hashtbl-keys dev-glyph-glyph-hash))
|
||
|
||
|
||
;; yet another glyph-to-glyph conversions.
|
||
(defvar dev-glyph-glyph-2
|
||
'(("$,4"*(B" . "$,4".(B")
|
||
("$,4"+(B" . "$,4"/(B")
|
||
("$,4",(B" . "$,4"0(B")
|
||
("$,4"-(B" . "$,4"1(B")))
|
||
(defvar dev-glyph-glyph-2-hash
|
||
(let* ((hash (make-hash-table :test 'equal)))
|
||
(mapc (function (lambda (x) (puthash (car x) (cdr x) hash)))
|
||
dev-glyph-glyph-2)
|
||
hash))
|
||
(defvar dev-glyph-glyph-2-regexp
|
||
(devanagari-regexp-of-hashtbl-keys dev-glyph-glyph-2-hash))
|
||
|
||
(defun dev-charseq (from &optional to)
|
||
(if (null to) (setq to from))
|
||
(number-sequence (decode-char 'devanagari-cdac from)
|
||
(decode-char 'devanagari-cdac to)))
|
||
|
||
(defvar dev-glyph-cvn
|
||
(append
|
||
(dev-charseq #x2b)
|
||
(dev-charseq #x3c #xc1)
|
||
(dev-charseq #xc3))
|
||
"Devanagari Consonants/Vowels/Nukta Glyphs")
|
||
|
||
(defvar dev-glyph-space
|
||
(dev-charseq #xf0 #xfe)
|
||
"Devanagari Spacing Glyphs")
|
||
|
||
(defvar dev-glyph-right-modifier
|
||
(append
|
||
(dev-charseq #xc9)
|
||
(dev-charseq #xd2 #xd5))
|
||
"Devanagari Modifiers attached at the right side.")
|
||
|
||
(defvar dev-glyph-right-modifier-regexp
|
||
(concat "[" dev-glyph-right-modifier "]"))
|
||
|
||
(defvar dev-glyph-left-matra
|
||
(dev-charseq #xca #xd1)
|
||
"Devanagari Matras attached at the left side.")
|
||
|
||
(defvar dev-glyph-top-matra
|
||
(dev-charseq #xe0 #xef)
|
||
"Devanagari Matras attached at the top side.")
|
||
|
||
(defvar dev-glyph-bottom-modifier
|
||
(append
|
||
(dev-charseq #xd6 #xdf)
|
||
(dev-charseq #xc2))
|
||
"Devanagari Modifiers attached at the bottom.")
|
||
|
||
(defvar dev-glyph-order
|
||
`((,dev-glyph-cvn . 1)
|
||
(,dev-glyph-space . 2)
|
||
(,dev-glyph-right-modifier . 3)
|
||
(,dev-glyph-left-matra . 3) ;; processed by reference point.
|
||
(,dev-glyph-top-matra . 4)
|
||
(,(dev-charseq #xc7 #xc8) . 5)
|
||
(,(dev-charseq #xc4) . 6)
|
||
(,(dev-charseq #xc6) . 6)
|
||
(,(dev-charseq #xc5) . 7)
|
||
(,dev-glyph-bottom-modifier . 8)))
|
||
|
||
(mapc
|
||
(function (lambda (x)
|
||
(mapc
|
||
(function (lambda (y)
|
||
(put-char-code-property y 'composition-order (cdr x))))
|
||
(car x))))
|
||
dev-glyph-order)
|
||
|
||
(mapc
|
||
(function (lambda (x)
|
||
(put-char-code-property x 'reference-point '(3 . 5))))
|
||
dev-glyph-left-matra)
|
||
|
||
(defun devanagari-compose-syllable-string (string)
|
||
(with-temp-buffer
|
||
(insert (decompose-string string))
|
||
(devanagari-compose-syllable-region (point-min) (point-max))
|
||
(buffer-string)))
|
||
|
||
(defun devanagari-compose-syllable-region (from to)
|
||
"Compose devanagari syllable in region FROM to TO."
|
||
(let ((glyph-str nil) (cons-num 0) glyph-str-list
|
||
(last-halant nil) (preceding-r nil) (last-modifier nil)
|
||
(last-char (char-before to)) match-str
|
||
glyph-block split-pos)
|
||
(save-excursion
|
||
(save-restriction
|
||
;;; *** char-to-glyph conversion ***
|
||
;; Special rule 1. -- Last halant must be preserved.
|
||
(if (eq last-char ?$,16-(B)
|
||
(progn
|
||
(setq last-halant t)
|
||
(narrow-to-region from (1- to)))
|
||
(narrow-to-region from to)
|
||
;; note if the last char is modifier.
|
||
(if (or (eq last-char ?$,15A(B) (eq last-char ?$,15B(B))
|
||
(setq last-modifier t)))
|
||
(goto-char (point-min))
|
||
;; Special rule 2. -- preceding "r halant" must be modifier.
|
||
(when (looking-at "$,15p6-(B.")
|
||
(setq preceding-r t)
|
||
(goto-char (+ 2 (point))))
|
||
;; translate the rest characters into glyphs
|
||
(while (re-search-forward dev-char-glyph-regexp nil t)
|
||
(setq match-str (match-string 0))
|
||
(setq glyph-str
|
||
(concat glyph-str
|
||
(gethash match-str dev-char-glyph-hash)))
|
||
;; count the number of consonant-glyhs.
|
||
(if (string-match devanagari-consonant match-str)
|
||
(setq cons-num (1+ cons-num))))
|
||
;; preceding-r must be attached before the anuswar if exists.
|
||
(if preceding-r
|
||
(if last-modifier
|
||
(setq glyph-str (concat (substring glyph-str 0 -1)
|
||
"$,4"'(B" (substring glyph-str -1)))
|
||
(setq glyph-str (concat glyph-str "$,4"'(B"))))
|
||
(if last-halant (setq glyph-str (concat glyph-str "$,4""(B")))
|
||
;;; *** glyph-to-glyph conversion ***
|
||
(when (string-match dev-glyph-glyph-regexp glyph-str)
|
||
(setq glyph-str
|
||
(replace-match (gethash (match-string 0 glyph-str)
|
||
dev-glyph-glyph-hash)
|
||
nil t glyph-str))
|
||
(if (and (> cons-num 1)
|
||
(string-match dev-glyph-glyph-2-regexp glyph-str))
|
||
(setq glyph-str
|
||
(replace-match (gethash (match-string 0 glyph-str)
|
||
dev-glyph-glyph-2-hash)
|
||
nil t glyph-str))))
|
||
;;; *** glyph reordering ***
|
||
(while (setq split-pos (string-match "$,4""(B\\|.$" glyph-str))
|
||
(setq glyph-block (substring glyph-str 0 (1+ split-pos)))
|
||
(setq glyph-str (substring glyph-str (1+ split-pos)))
|
||
(setq
|
||
glyph-block
|
||
(if (string-match dev-glyph-right-modifier-regexp glyph-block)
|
||
(sort (string-to-list glyph-block)
|
||
(function (lambda (x y)
|
||
(< (get-char-code-property x 'composition-order)
|
||
(get-char-code-property y 'composition-order)))))
|
||
(sort (string-to-list glyph-block)
|
||
(function (lambda (x y)
|
||
(let ((xo (get-char-code-property x 'composition-order))
|
||
(yo (get-char-code-property y 'composition-order)))
|
||
(if (= xo 2) nil (if (= yo 2) t (< xo yo)))))))))
|
||
(setq glyph-str-list (nconc glyph-str-list glyph-block)))
|
||
;; concatenate and attach reference-points.
|
||
(setq glyph-str
|
||
(cdr
|
||
(apply
|
||
'nconc
|
||
(mapcar
|
||
(function (lambda (x)
|
||
(list
|
||
(or (get-char-code-property x 'reference-point)
|
||
'(5 . 3) ;; default reference point.
|
||
)
|
||
x)))
|
||
glyph-str-list))))))
|
||
(compose-region from to glyph-str)))
|
||
|
||
(provide 'devan-util)
|
||
|
||
;;; arch-tag: 9bc4d6e3-f2b9-4110-886e-ff9b66b7eebc
|
||
;;; devan-util.el ends here
|