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897755c4 1;;; devan-util.el --- Support for composing Devanagari characters -*-coding: iso-2022-7bit;-*-
4ed46869 2
1bec6fdb 3;; Copyright (C) 2001 Free Software Foundation, Inc.
4ed46869 4
2fc227cb 5;; Maintainer: KAWABATA, Taichi <kawabata@m17n.org>
1bec6fdb 6;; Keywords: multilingual, Devanagari
4ed46869
KH		 7
8;; This file is part of GNU Emacs.
9
10;; GNU Emacs is free software; you can redistribute it and/or modify
11;; it under the terms of the GNU General Public License as published by
12;; the Free Software Foundation; either version 2, or (at your option)
13;; any later version.
14
15;; GNU Emacs is distributed in the hope that it will be useful,
16;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18;; GNU General Public License for more details.
19
20;; You should have received a copy of the GNU General Public License
e803d6bd
KH		 21;; along with GNU Emacs; see the file COPYING. If not, write to the
22;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23;; Boston, MA 02111-1307, USA.
4ed46869 24
1bec6fdb 25;; Created: Feb. 17. 2001
37cdc7ad 26
1bec6fdb 27;;; Commentary:
4ed46869 28
1bec6fdb
RS		 29;; This file provides character(Unicode) to glyph(CDAC) conversion and
30;; composition of Devanagari script characters.
4ed46869
KH		 31
32;;; Code:
33
1bec6fdb
RS		 34;; Devanagari Composable Pattern
35;; C .. Consonants
36;; V .. Vowel
37;; H .. Halant
38;; M .. Matra
39;; V .. Vowel
40;; A .. Anuswar
41;; D .. Chandrabindu
42;; (N .. Zerowidth Non Joiner)
43;; (J .. Zerowidth Joiner. )
44;; 1. vowel
45;; V(A/D)?
46;; 2. syllable : maximum of 5 consecutive consonants. (e.g. kartsnya)
9e35da28 47;; ((CH)?(CH)?(CH)?CH)?C(H|M?(A|D)?)?
1bec6fdb
RS		 48
49(defconst devanagari-consonant
50 "[\e$,15U\e(B-\e$,15y68\e(B-\e$,16?\e(B]")
51
8f924df7
KH		 52 ;;("\e$,16B\e(B" . nil)
53 ;;("\e$,16A\e(B" . nil)
54 ;;("\e$,16C\e(B" . nil)
55
56
1bec6fdb 57(defconst devanagari-composable-pattern
a1506d29 58 (concat
8dcc539d 59 "\\([\e$,15E\e(B-\e$,15T6@6A\e(B][\e$,15A5B\e(B]?\\)\\|[\e$,15C6D\e(B]"
1bec6fdb
RS		 60 "\\|\\("
61 "\\(?:\\(?:[\e$,15U\e(B-\e$,15y68\e(B-\e$,16?\e(B]\e$,16-\e(B\\)?\\(?:[\e$,15U\e(B-\e$,15y68\e(B-\e$,16?\e(B]\e$,16-\e(B\\)?\\(?:[\e$,15U\e(B-\e$,15y68\e(B-\e$,16?\e(B]\e$,16-\e(B\\)?[\e$,15U\e(B-\e$,15y68\e(B-\e$,16?\e(B]\e$,16-\e(B\\)?"
62 "[\e$,15U\e(B-\e$,15y68\e(B-\e$,16?\e(B]\\(?:\e$,16-\e(B\\|[\e$,15~\e(B-\e$,16-6B6C\e(B]?[\e$,15B5A\e(B]?\\)?"
63 "\\)")
64 "Regexp matching a composable sequence of Devanagari characters.")
65
2e82b5d5
KH		 66(dolist (range '((#x0903 . #x0903)
67 (#x0905 . #x0939)
68 (#x0958 . #x0961)))
69 (set-char-table-range indian-composable-pattern range
70 devanagari-composable-pattern))
71
8abb8f29 72;;;###autoload
1bec6fdb 73(defun devanagari-compose-region (from to)
4ed46869 74 (interactive "r")
31ce7719 75 (save-excursion
1bec6fdb
RS		 76 (save-restriction
77 (narrow-to-region from to)
78 (goto-char (point-min))
79 (while (re-search-forward devanagari-composable-pattern nil t)
0b520940
DL		 80 (devanagari-compose-syllable-region (match-beginning 0)
81 (match-end 0))))))
1bec6fdb
RS		 82(defun devanagari-compose-string (string)
83 (with-temp-buffer
84 (insert (decompose-string string))
85 (devanagari-compose-region (point-min) (point-max))
86 (buffer-string)))
87
6b61353c 88;;;###autoload
91c78c93
DL		 89(defun devanagari-post-read-conversion (len)
90 (save-excursion
91 (save-restriction
92 (let ((buffer-modified-p (buffer-modified-p)))
93 (narrow-to-region (point) (+ (point) len))
94 (devanagari-compose-region (point-min) (point-max))
95 (set-buffer-modified-p buffer-modified-p)
96 (- (point-max) (point-min))))))
97
4f102de2
RS		 98(defun devanagari-regexp-of-hashtbl-keys (hashtbl)
99 "Return a regular expression that matches all keys in hashtable HASHTBL."
1bec6fdb
RS		 100 (let ((max-specpdl-size 1000))
101 (regexp-opt
a1506d29 102 (sort
1bec6fdb
RS		 103 (let (dummy)
104 (maphash (function (lambda (key val) (setq dummy (cons key dummy)))) hashtbl)
105 dummy)
106 (function (lambda (x y) (> (length x) (length y))))))))
107
2e82b5d5
KH		 108;;;###autoload
109(defun devanagari-composition-function (pos &optional string)
110 "Compose Devanagari characters after the position POS.
111If STRING is not nil, it is a string, and POS is an index to the string.
112In this case, compose characters after POS of the string."
113 (if string
114 ;; Not yet implemented.
115 nil
116 (goto-char pos)
117 (if (looking-at devanagari-composable-pattern)
118 (prog1 (match-end 0)
119 (devanagari-compose-syllable-region pos (match-end 0))))))
1bec6fdb
RS		 120
121;; Notes on conversion steps.
122
a1506d29 123;; 1. chars to glyphs
1bec6fdb
RS		 124;;
125;; Rules will not be applied to the halant appeared at the end of the
126;; text. Also, the preceding/following "r" will be treated as special case.
127
128;; 2. glyphs reordering.
129;;
130;; The glyphs are split by halant, and each glyph groups are
131;; re-ordered in the following order.
132;;
133;; Note that `consonant-glyph' mentioned here does not contain the
134;; vertical bar (right modifier) attached at the right of the
135;; consonant.
a1506d29
JB		 136;;
137;; If the glyph-group contains right modifier,
1bec6fdb
RS		 138;; (1) consonant-glyphs/vowels, with nukta sign
139;; (2) spacing
140;; (3) right modifier (may be matra)
141;; (4) top matra
142;; (5) preceding "r"
143;; (6) anuswar
144;; (7) following "r"
145;; (8) bottom matra or halant.
a1506d29
JB		 146;;
147;; Otherwise,
1bec6fdb
RS		 148;; (1) consonant-glyph/vowels, with nukta sign
149;; (3) left matra
a1506d29 150;; (4) top matra
1bec6fdb
RS		 151;; (5) preceding "r"
152;; (6) anuswar
153;; (7) following "r"
154;; (8) bottom matra or halant.
155;; (2) spacing
156
157;; 3. glyph to glyph
158;;
159;; For better display, some glyph display would be tuned.
160
161;; 4. Composition.
162;;
163;; left modifiers will be attached at the left.
164;; others will be attached right.
165
166;; Problem::
167;; Can we generalize this methods to other Indian scripts?
168
77539682
KH		 169(defvar dev-char-glyph
170 '(("\e$,15E\e(B" . "\e$,4 K\e(B")
1d475b5e
KH		 171 ("\e$,15F\e(B" . "\e$,4 K")\e(B")
172 ("\e$,15~\e(B" . "\e$,4")\e(B")
77539682 173 ("\e$,15G\e(B" . "\e$,4 \\e(B")
1d475b5e
KH		 174 ("\e$,15\7f\e(B" . "\e$,4"*\e(B")
175 ("\e$,15\7f5A\e(B" . "\e$,4"*\e(B\\e$,4"&\e(B")
77539682 176 ("\e$,15H\e(B" . "\e$,4 \"'\e(B")
1d475b5e
KH		 177 ("\e$,15H5A\e(B" . "\e$,4 \"'"&\e(B")
178 ("\e$,16 \e(B" . "\e$,4"2\e(B")
179 ("\e$,16 5A\e(B" . "\e$,4"2"&\e(B")
77539682 180 ("\e$,15I\e(B" . "\e$,4 ]\e(B")
1d475b5e
KH		 181 ("\e$,16!\e(B" . "\e$,4"6\e(B")
182 ("\e$,15J\e(B" . "\e$,4 ^"P\e(B")
183 ("\e$,16"\e(B" . "\e$,4":\e(B")
184 ("\e$,15K\e(B" . "\e$,4 `"Q\e(B")
185 ("\e$,16#\e(B" . "\e$,4">\e(B")
77539682 186 ;;("\e$,15L\e(B" . nil) ; not implemented.
1d475b5e
KH		 187 ("\e$,16$\e(B" . "\e$,4"?\e(B")
188 ("\e$,15M\e(B" . "\e$,4 b"L\e(B")
189 ("\e$,15M5A\e(B" . "\e$,4 b"$\e(B")
190 ("\e$,15M5B\e(B" . "\e$,4 b"$\e(B")
191 ("\e$,16%\e(B" . "\\e$,4"L\e(B")
a1506d29
JB		 192 ("\e$,15N\e(B" . "\e$,4 b"@\e(B")
193 ("\e$,15N5A\e(B" . "\e$,4 b"@"&\e(B")
1d475b5e
KH		 194 ("\e$,16&\e(B" . "\\e$,4"@\e(B")
195 ("\e$,16&5A\e(B" . "\\e$,4"@\e(B\\e$,4"&\e(B")
a1506d29 196 ("\e$,15O\e(B" . "\e$,4 b\e(B")
1d475b5e
KH		 197 ("\e$,16'\e(B" . "\\e$,4"D\e(B")
198 ("\e$,16'5A\e(B" . "\\e$,4"D\e(B\\e$,4"&\e(B")
a1506d29
JB		 199 ("\e$,15P\e(B" . "\e$,4 b"D\e(B")
200 ("\e$,15P5A\e(B" . "\e$,4 b"D"&\e(B")
1d475b5e
KH		 201 ("\e$,16(\e(B" . "\\e$,4"H\e(B")
202 ("\e$,16(5A\e(B" . "\\e$,4"H\e(B\\e$,4"&\e(B")
203 ("\e$,15Q\e(B" . "\e$,4 K")"L\e(B") ;; special rule for reodering.
204 ("\e$,15Q5A\e(B" . "\e$,4 K")"$\e(B")
205 ("\e$,15Q5B\e(B" . "\e$,4 K")"$\e(B")
206 ("\e$,16)\e(B" . "\\e$,4")"L\e(B")
207 ("\e$,16)5A\e(B" . "\\e$,4")"$\e(B")
208 ("\e$,16)5B\e(B" . "\\e$,4")"$\e(B")
a1506d29
JB		 209 ("\e$,15R\e(B" . "\e$,4 K")"@\e(B")
210 ("\e$,15R5A\e(B" . "\e$,4 K")"@"&\e(B")
1d475b5e
KH		 211 ("\e$,16*\e(B" . "\\e$,4")"@\e(B")
212 ("\e$,16*5A\e(B" . "\\e$,4")"@"&\e(B")
213 ("\e$,15S\e(B" . "\e$,4 K")"D\e(B")
214 ("\e$,15S5A\e(B" . "\e$,4 K")"D"&\e(B")
215 ("\e$,16+\e(B" . "\\e$,4")"D\e(B")
216 ("\e$,16+5A\e(B" . "\\e$,4")"D"&\e(B")
a1506d29
JB		 217 ("\e$,15T\e(B" . "\e$,4 K")"H\e(B")
218 ("\e$,15T5A\e(B" . "\e$,4 K")"H"&\e(B")
1d475b5e
KH		 219 ("\e$,16,\e(B" . "\\e$,4")"H\e(B")
220 ("\e$,16,5A\e(B" . "\\e$,4")"H"&\e(B")
a1506d29 221 ("\e$,16@\e(B" . "\e$,4 a"Q\e(B")
77539682 222 ;;("\e$,16B\e(B" . nil)
a1506d29 223 ;;("\e$,16A\e(B" . nil)
77539682
KH		 224 ;;("\e$,16C\e(B" . nil)
225
226 ;; GRUTTALS
1d475b5e 227 ("\e$,15U\e(B" . "\e$,4 e"R\e(B")
77539682 228 ("\e$,15U6-\e(B" . "\e$,4 c\e(B")
1d475b5e
KH		 229 ("\e$,15U6-5p\e(B" . "\e$,4 g"R\e(B")
230 ("\e$,15U6-5d\e(B" . "\e$,4 h"R\e(B")
231 ("\e$,15U6-5w\e(B" . "\e$,4 i")\e(B")
77539682
KH		 232 ("\e$,15U6-5w6-\e(B" . "\e$,4 i\e(B")
233
1d475b5e 234 ("\e$,15V\e(B" . "\e$,4 j")\e(B")
77539682 235 ("\e$,15V6-\e(B" . "\e$,4 j\e(B")
1d475b5e 236 ("\e$,15V6-5p\e(B" . "\e$,4 l")\e(B")
77539682
KH		 237 ("\e$,15V6-5p6-\e(B" . "\e$,4 l\e(B")
238
a1506d29
JB		 239 ("\e$,15W\e(B" . "\e$,4 m")\e(B")
240 ("\e$,15W6-\e(B" . "\e$,4 m\e(B")
1d475b5e 241 ("\e$,15W6-5p\e(B" . "\e$,4 o")\e(B")
77539682
KH		 242 ("\e$,15W6-5p6-\e(B" . "\e$,4 o\e(B")
243
a1506d29
JB		 244 ("\e$,15X\e(B" . "\e$,4 p")\e(B")
245 ("\e$,15X6-\e(B" . "\e$,4 p\e(B")
246 ("\e$,15X6-5p\e(B" . "\e$,4 q")\e(B")
247 ("\e$,15X6-5p6-\e(B" . "\e$,4 q\e(B")
77539682 248
1d475b5e 249 ("\e$,15Y\e(B" . "\e$,4 r"S\e(B")
a1506d29
JB		 250 ;; PALATALS
251 ("\e$,15Z\e(B" . "\e$,4 s")\e(B")
252 ("\e$,15Z6-\e(B" . "\e$,4 s\e(B")
253 ("\e$,15Z6-5p\e(B" . "\e$,4 t")\e(B")
77539682
KH		 254 ("\e$,15Z6-5p6-\e(B" . "\e$,4 t\e(B")
255
a1506d29 256 ("\e$,15[\e(B" . "\e$,4 u"T\e(B")
77539682 257
a1506d29
JB		 258 ("\e$,15\\e(B" . "\e$,4 v")\e(B")
259 ("\e$,15\6-\e(B" . "\e$,4 v\e(B")
260 ("\e$,15\6-5p\e(B" . "\e$,4 x")\e(B")
261 ("\e$,15\6-5p6-\e(B" . "\e$,4 x\e(B")
262 ("\e$,15\6-5^\e(B" . "\e$,4 y")\e(B")
263 ("\e$,15\6-5^6-\e(B" . "\e$,4 y\e(B")
77539682 264
a1506d29
JB		 265 ("\e$,15]\e(B" . "\e$,4 z")\e(B")
266 ("\e$,15]6-\e(B" . "\e$,4 z\e(B")
267 ("\e$,15]6-5p\e(B" . "\e$,4 {")\e(B")
268 ("\e$,15]6-5p6-\e(B" . "\e$,4 {\e(B")
77539682 269
1d475b5e 270 ("\e$,15^\e(B" . "\e$,4 |")\e(B")
77539682 271 ("\e$,15^6-\e(B" . "\e$,4 |\e(B")
a1506d29 272 ;; CEREBRALS
1d475b5e
KH		 273 ("\e$,15_\e(B" . "\e$,4 }"U\e(B")
274 ("\e$,15_6-5_\e(B" . "\e$,4 ~"U\e(B")
275 ("\e$,15_6-5`\e(B" . "\e$,4 \7f"U\e(B")
77539682 276
a1506d29
JB		 277 ("\e$,15`\e(B" . "\e$,4! "V\e(B")
278 ("\e$,15`6-5`\e(B" . "\e$,4!!"V\e(B")
77539682 279
a1506d29
JB		 280 ("\e$,15a\e(B" . "\e$,4!""W\e(B")
281 ("\e$,15a6-5a\e(B" . "\e$,4!$"W\e(B")
282 ("\e$,15a6-5b\e(B" . "\e$,4!%"W\e(B")
77539682 283
a1506d29 284 ("\e$,15b\e(B" . "\e$,4!&"X\e(B")
77539682 285
1d475b5e 286 ("\e$,15c\e(B" . "\e$,4!(")\e(B")
77539682 287 ("\e$,15c6-\e(B" . "\e$,4!(\e(B")
a1506d29
JB		 288 ;; DENTALS
289 ("\e$,15d\e(B" . "\e$,4!)")\e(B")
290 ("\e$,15d6-\e(B" . "\e$,4!)\e(B")
291 ("\e$,15d6-5p\e(B" . "\e$,4!*")\e(B")
292 ("\e$,15d6-5p6-\e(B" . "\e$,4!*\e(B")
293 ("\e$,15d6-5d\e(B" . "\e$,4!+")\e(B")
294 ("\e$,15d6-5d6-\e(B" . "\e$,4!+\e(B")
295
296 ("\e$,15e\e(B" . "\e$,4!,")\e(B")
297 ("\e$,15e6-\e(B" . "\e$,4!,\e(B")
298 ("\e$,15e6-5p\e(B" . "\e$,4!-")\e(B")
299 ("\e$,15e6-5p6-\e(B" . "\e$,4!-\e(B")
300
301 ("\e$,15f\e(B" . "\e$,4!."Y\e(B")
1d475b5e
KH		 302 ("\e$,15f6#\e(B" . "\e$,4!/"Y\e(B")
303 ("\e$,15f6-5p\e(B" . "\e$,4!0"Y\e(B")
304 ("\e$,15f6-5f\e(B" . "\e$,4!1"Y\e(B")
305 ("\e$,15f6-5g\e(B" . "\e$,4!2"Y\e(B")
77539682
KH		 306 ("\e$,15f6-5n\e(B" . "\e$,4!3\e(B")
307 ("\e$,15f6-5o\e(B" . "\e$,4!4\e(B")
1d475b5e 308 ("\e$,15f6-5u\e(B" . "\e$,4!5"Y\e(B")
77539682 309
a1506d29
JB		 310 ("\e$,15g\e(B" . "\e$,4!6")\e(B")
311 ("\e$,15g6-\e(B" . "\e$,4!6\e(B")
312 ("\e$,15g6-5p\e(B" . "\e$,4!7")\e(B")
313 ("\e$,15g6-5p6-\e(B" . "\e$,4!7\e(B")
77539682 314
a1506d29
JB		 315 ("\e$,15h\e(B" . "\e$,4!8")\e(B")
316 ("\e$,15h6-\e(B" . "\e$,4!8\e(B")
317 ("\e$,15h6-5p\e(B" . "\e$,4!9")\e(B")
318 ("\e$,15h6-5p6-\e(B" . "\e$,4!9")\e(B")
319 ("\e$,15h6-5h\e(B" . "\e$,4!:")\e(B")
320 ("\e$,15h6-5h6-\e(B" . "\e$,4!:\e(B")
77539682 321
1d475b5e 322 ("\e$,15i\e(B" . "\e$,4!8"#")\e(B")
a1506d29
JB		 323 ;; LABIALS
324 ("\e$,15j\e(B" . "\e$,4!;")\e(B")
325 ("\e$,15j6-\e(B" . "\e$,4!;\e(B")
326 ("\e$,15j6-5p\e(B" . "\e$,4!<")\e(B")
327 ("\e$,15j6-5p6-\e(B" . "\e$,4!<\e(B")
328
329 ("\e$,15k\e(B" . "\e$,4!a"[\e(B")
330 ("\e$,15k6-\e(B" . "\e$,4!=\e(B")
331 ("\e$,15k6-5p\e(B" . "\e$,4!c"[\e(B")
332
333 ("\e$,15l\e(B" . "\e$,4!d")\e(B")
334 ("\e$,15l6-\e(B" . "\e$,4!d\e(B")
335 ("\e$,15l6-5p\e(B" . "\e$,4!e")\e(B")
336 ("\e$,15l6-5p6-\e(B" . "\e$,4!e\e(B")
337
338 ("\e$,15m\e(B" . "\e$,4!f")\e(B")
339 ("\e$,15m6-\e(B" . "\e$,4!f\e(B")
340 ("\e$,15m6-5p\e(B" . "\e$,4!g")\e(B")
341 ("\e$,15m6-5p6-\e(B" . "\e$,4!g\e(B")
77539682 342
1d475b5e 343 ("\e$,15n\e(B" . "\e$,4!h")\e(B")
77539682 344 ("\e$,15n6-\e(B" . "\e$,4!h\e(B")
1d475b5e 345 ("\e$,15n6-5p\e(B" . "\e$,4!i")\e(B")
77539682
KH		 346 ("\e$,15n6-5p6-\e(B" . "\e$,4!i\e(B")
347 ;; SEMIVOWELS
a1506d29
JB		 348 ("\e$,15o\e(B" . "\e$,4!j")\e(B")
349 ("\e$,15o6-\e(B" . "\e$,4!j\e(B")
350 ("\e$,15o6-5p\e(B" . "\e$,4!k")\e(B")
351 ("\e$,15o6-5p6-\e(B" . "\e$,4!k\e(B")
77539682
KH		 352 ("\e$,16-5o\e(B" . "\e$,4!l\e(B") ;; when every ohter lig. fails.
353
a1506d29 354 ("\e$,15p\e(B" . "\e$,4!n"W\e(B")
77539682 355 ;; ("\e$,15p6-\e(B" . "\\e$,4"'\e(B") ;; special case. only the topmost pos.
a1506d29 356 ("\e$,15q\e(B" . "\e$,4!n"#"W\e(B")
77539682 357 ("\e$,15q6-\e(B" . "\e$,4!m\e(B") ;; IS 13194 speical rule.
a1506d29
JB		 358 ("\e$,15p6!\e(B" . "\e$,4!o"[\e(B")
359 ("\e$,15p6"\e(B" . "\e$,4!p"\\e(B")
77539682 360
a1506d29
JB		 361 ("\e$,15r\e(B" . "\e$,4!q")\e(B")
362 ("\e$,15r6-\e(B" . "\e$,4!q\e(B")
363 ("\e$,15s\e(B" . "\e$,4!s\e(B")
364 ("\e$,15s6-\e(B" . "\e$,4!r\e(B")
1d475b5e
KH		 365 ("\e$,15t\e(B" . "\e$,4!s"#\e(B")
366 ("\e$,15t6-\e(B" . "\e$,4!r"#\e(B")
77539682 367
1d475b5e 368 ("\e$,15u\e(B" . "\e$,4!t")\e(B")
77539682 369 ("\e$,15u6-\e(B" . "\e$,4!t\e(B")
1d475b5e 370 ("\e$,15u6-5p\e(B" . "\e$,4!u")\e(B")
77539682 371 ("\e$,15u6-5p6-\e(B" . "\e$,4!u\e(B")
a1506d29
JB		 372 ;; SIBILANTS
373 ("\e$,15v\e(B" . "\e$,4!v")\e(B")
77539682 374 ("\e$,15v6-\e(B" . "\e$,4!v\e(B")
1d475b5e 375 ("\e$,15v6-5u\e(B" . "\e$,4!w")\e(B")
77539682 376 ("\e$,15v6-5u6-\e(B" . "\e$,4!w\e(B")
1d475b5e 377 ("\e$,15v6-5p\e(B" . "\e$,4!x")\e(B")
77539682
KH		 378 ("\e$,15v6-5p6-\e(B" . "\e$,4!x\e(B")
379
1d475b5e 380 ("\e$,15w\e(B" . "\e$,4!y")\e(B")
77539682 381 ("\e$,15w6-\e(B" . "\e$,4!y\e(B")
1d475b5e 382 ("\e$,15x\e(B" . "\e$,4!z")\e(B")
77539682 383 ("\e$,15x6-\e(B" . "\e$,4!z\e(B")
1d475b5e 384 ("\e$,15x6-5p\e(B" . "\e$,4!{")\e(B")
77539682
KH		 385 ("\e$,15x6-5p6-\e(B" . "\e$,4!{\e(B")
386
387 ("\e$,15y\e(B" . "\e$,4!}\e(B")
388 ("\e$,15y6-\e(B" . "\e$,4!|\e(B")
389 ("\e$,15y6#\e(B" . "\e$,4!~\e(B")
390 ("\e$,15y6-5p\e(B" . "\e$,4!\7f\e(B")
1d475b5e
KH		 391 ("\e$,15y6-5n\e(B" . "\e$,4" \e(B")
392 ("\e$,15y6-5o\e(B" . "\e$,4"!\e(B")
a1506d29 393 ;; NUKTAS
1d475b5e 394 ("\e$,168\e(B" . "\e$,4 f"R"S\e(B")
a1506d29
JB		 395 ("\e$,1686-\e(B" . "\e$,4 d\e(B")
396 ("\e$,169\e(B" . "\e$,4 k")\e(B")
397 ("\e$,1696-\e(B" . "\e$,4 k\e(B")
398 ("\e$,16:\e(B" . "\e$,4 n")\e(B")
399 ("\e$,16:6-\e(B" . "\e$,4 n\e(B")
400 ("\e$,16;\e(B" . "\e$,4 w")\e(B")
401 ("\e$,16;6-\e(B" . "\e$,4 w\e(B")
402 ("\e$,16<\e(B" . "\e$,4!#"W\e(B")
403 ("\e$,16=\e(B" . "\e$,4!'"X\e(B")
404 ("\e$,16>\e(B" . "\e$,4!b"[\e(B")
405 ("\e$,16>6-\e(B" . "\e$,4!>\e(B")
1d475b5e 406 ("\e$,16?\e(B" . "\e$,4!j"#")\e(B")
77539682 407 ;; misc modifiers.
1d475b5e 408 ("\e$,15A\e(B" . "\\e$,4"$\e(B")
a1506d29 409 ("\e$,15B\e(B" . "\\e$,4"&\e(B")
77539682 410 ("\e$,15C\e(B" . "\e$,4 F\e(B")
1d475b5e 411 ("\e$,15|\e(B" . "\e$,4"#\e(B")
77539682 412 ("\e$,15}\e(B" . "\e$,4 E\e(B")
1d475b5e
KH		 413 ("\e$,16-\e(B" . "\e$,4""\e(B")
414 ("\e$,16-5p\e(B" . "\e$,4"%\e(B") ;; following "r"
a1506d29 415 ;; ("\e$,160\e(B" . "\e$,4 D\e(B")
8dcc539d 416 ("\e$,16D\e(B" . "\e$,4 J\e(B")
a1506d29
JB		 417 ;; ("\e$,16F\e(B" . "")
418 ;; ("\e$,16G\e(B" . "")
419 ;; ("\e$,16H\e(B" . "")
420 ;; ("\e$,16I\e(B" . "")
421 ;; ("\e$,16J\e(B" . "")
422 ;; ("\e$,16K\e(B" . "")
423 ;; ("\e$,16L\e(B" . "")
424 ;; ("\e$,16M\e(B" . "")
425 ;; ("\e$,16N\e(B" . "")
77539682
KH		 426 ;; ("\e$,16O\e(B" . "")
427 )
a1506d29 428 "Devanagari characters to glyphs conversion table.
77539682
KH		 429Default value contains only the basic rules. You may add your own
430preferred rule from the sanskrit fonts." )
1bec6fdb
RS		 431
432(defvar dev-char-glyph-hash
aca05879 433 (let* ((hash (make-hash-table :test 'equal)))
1bec6fdb
RS		 434 (mapc (function (lambda (x) (puthash (car x) (cdr x) hash)))
435 dev-char-glyph)
436 hash))
437
438(defvar dev-char-glyph-regexp
4f102de2 439 (devanagari-regexp-of-hashtbl-keys dev-char-glyph-hash))
1bec6fdb
RS		 440
441;; glyph-to-glyph conversion table.
a1506d29 442;; it is supposed that glyphs are ordered in
1bec6fdb
RS		 443;; [consonant/nukta] - [matra/halant] - [preceding-r] - [anuswar].
444
77539682 445(defvar dev-glyph-glyph
1d475b5e
KH		 446 '(("\\e$,4"'\e(B\\e$,4"&\e(B" . "\\e$,4"(\e(B")
447 ("\\e$,4"'\e(B\\e$,4"$\e(B" . "\\e$,4"(\e(B")
448 ("\e$,4"*\e(B\\e$,4"&\e(B" . "\e$,4"+\e(B")
449 ("\e$,4"*\e(B\\e$,4"'\e(B" . "\e$,4",\e(B")
450 ("\e$,4"*\e(B\\e$,4"'\e(B\\e$,4"&\e(B" . "\e$,4"-\e(B")
451 ("\e$,4"2\e(B\\e$,4"&\e(B" . "\e$,4"3\e(B")
452 ("\e$,4"2\e(B\\e$,4"'\e(B" . "\e$,4"4\e(B")
453 ("\e$,4"2\e(B\\e$,4"'\e(B\\e$,4"&\e(B" . "\e$,4"5\e(B")
454 ("\e$,4"#\e(B\\e$,4"6\e(B" . "\e$,4"7\e(B")
455 ("\e$,4"%\e(B\\e$,4"6\e(B" . "\e$,4"8\e(B")
456 ;;("\e$,4"6\e(B" . "\e$,4"9\e(B")
457 ("\e$,4"#\e(B\\e$,4":\e(B" . "\e$,4";\e(B")
458 ("\e$,4"%\e(B\\e$,4":\e(B" . "\e$,4"<\e(B")
459 ;;("\e$,4":\e(B" . "\e$,4"=\e(B")
460 ("\\e$,4"@\e(B\\e$,4"&\e(B" . "\\e$,4"A\e(B")
461 ("\\e$,4"@\e(B\\e$,4"'\e(B" . "\\e$,4"B\e(B")
462 ("\\e$,4"@\e(B\\e$,4"'\e(B\\e$,4"&\e(B" . "\\e$,4"C\e(B")
463 ("\\e$,4"D\e(B\\e$,4"&\e(B" . "\\e$,4"E\e(B")
464 ("\\e$,4"D\e(B\\e$,4"'\e(B" . "\\e$,4"F\e(B")
465 ("\\e$,4"D\e(B\\e$,4"'\e(B\\e$,4"&\e(B" . "\\e$,4"G\e(B")
466 ("\\e$,4"H\e(B\\e$,4"&\e(B" . "\\e$,4"I\e(B")
467 ("\\e$,4"H\e(B\\e$,4"'\e(B" . "\\e$,4"J\e(B")
468 ("\\e$,4"H\e(B\\e$,4"'\e(B\\e$,4"&\e(B" . "\\e$,4"K\e(B")
469 ("\\e$,4"L\e(B\\e$,4"&\e(B" . "\\e$,4"M\e(B")
470 ("\\e$,4"L\e(B\\e$,4"'\e(B" . "\\e$,4"N\e(B")
471 ("\\e$,4"L\e(B\\e$,4"'\e(B\\e$,4"&\e(B" . "\\e$,4"O\e(B")
77539682 472 ))
1bec6fdb 473(defvar dev-glyph-glyph-hash
aca05879 474 (let* ((hash (make-hash-table :test 'equal)))
1bec6fdb
RS		 475 (mapc (function (lambda (x) (puthash (car x) (cdr x) hash)))
476 dev-glyph-glyph)
477 hash))
478(defvar dev-glyph-glyph-regexp
4f102de2 479 (devanagari-regexp-of-hashtbl-keys dev-glyph-glyph-hash))
1bec6fdb
RS		 480
481
482;; yet another glyph-to-glyph conversions.
77539682 483(defvar dev-glyph-glyph-2
1d475b5e
KH		 484 '(("\e$,4"*\e(B" . "\e$,4".\e(B")
485 ("\e$,4"+\e(B" . "\e$,4"/\e(B")
486 ("\e$,4",\e(B" . "\e$,4"0\e(B")
487 ("\e$,4"-\e(B" . "\e$,4"1\e(B")))
1bec6fdb 488(defvar dev-glyph-glyph-2-hash
aca05879 489 (let* ((hash (make-hash-table :test 'equal)))
1bec6fdb
RS		 490 (mapc (function (lambda (x) (puthash (car x) (cdr x) hash)))
491 dev-glyph-glyph-2)
492 hash))
493(defvar dev-glyph-glyph-2-regexp
4f102de2 494 (devanagari-regexp-of-hashtbl-keys dev-glyph-glyph-2-hash))
1bec6fdb 495
1bec6fdb
RS		 496(defun dev-charseq (from &optional to)
497 (if (null to) (setq to from))
8f924df7
KH		 498 (number-sequence (decode-char 'devanagari-cdac from)
499 (decode-char 'devanagari-cdac to)))
1bec6fdb
RS		 500
501(defvar dev-glyph-cvn
a1506d29 502 (append
1bec6fdb
RS		 503 (dev-charseq #x2b)
504 (dev-charseq #x3c #xc1)
505 (dev-charseq #xc3))
506 "Devanagari Consonants/Vowels/Nukta Glyphs")
507
508(defvar dev-glyph-space
509 (dev-charseq #xf0 #xfe)
510 "Devanagari Spacing Glyphs")
511
512(defvar dev-glyph-right-modifier
a1506d29 513 (append
1bec6fdb
RS		 514 (dev-charseq #xc9)
515 (dev-charseq #xd2 #xd5))
516 "Devanagari Modifiers attached at the right side.")
517
518(defvar dev-glyph-right-modifier-regexp
519 (concat "[" dev-glyph-right-modifier "]"))
520
521(defvar dev-glyph-left-matra
522 (dev-charseq #xca #xd1)
523 "Devanagari Matras attached at the left side.")
524
525(defvar dev-glyph-top-matra
526 (dev-charseq #xe0 #xef)
527 "Devanagari Matras attached at the top side.")
528
529(defvar dev-glyph-bottom-modifier
a1506d29 530 (append
1bec6fdb
RS		 531 (dev-charseq #xd6 #xdf)
532 (dev-charseq #xc2))
533 "Devanagari Modifiers attached at the bottom.")
534
535(defvar dev-glyph-order
536 `((,dev-glyph-cvn . 1)
537 (,dev-glyph-space . 2)
538 (,dev-glyph-right-modifier . 3)
539 (,dev-glyph-left-matra . 3) ;; processed by reference point.
540 (,dev-glyph-top-matra . 4)
541 (,(dev-charseq #xc7 #xc8) . 5)
760061fa 542 (,(dev-charseq #xc4) . 6)
1bec6fdb
RS		 543 (,(dev-charseq #xc6) . 6)
544 (,(dev-charseq #xc5) . 7)
545 (,dev-glyph-bottom-modifier . 8)))
546
a1506d29 547(mapc
1bec6fdb 548 (function (lambda (x)
a1506d29 549 (mapc
1bec6fdb
RS		 550 (function (lambda (y)
551 (put-char-code-property y 'composition-order (cdr x))))
552 (car x))))
553 dev-glyph-order)
554
555(mapc
556 (function (lambda (x)
557 (put-char-code-property x 'reference-point '(3 . 5))))
558 dev-glyph-left-matra)
559
560(defun devanagari-compose-syllable-string (string)
561 (with-temp-buffer
562 (insert (decompose-string string))
563 (devanagari-compose-syllable-region (point-min) (point-max))
564 (buffer-string)))
565
77539682
KH		 566(defun devanagari-compose-syllable-region (from to)
567 "Compose devanagari syllable in region FROM to TO."
568 (let ((glyph-str nil) (cons-num 0) glyph-str-list
0b520940
DL		 569 (last-halant nil) (preceding-r nil) (last-modifier nil)
570 (last-char (char-before to)) match-str
571 glyph-block split-pos)
77539682
KH		 572 (save-excursion
573 (save-restriction
0b520940
DL		 574 ;;; *** char-to-glyph conversion ***
575 ;; Special rule 1. -- Last halant must be preserved.
576 (if (eq last-char ?\e$,16-\e(B)
577 (progn
578 (setq last-halant t)
579 (narrow-to-region from (1- to)))
580 (narrow-to-region from to)
581 ;; note if the last char is modifier.
582 (if (or (eq last-char ?\e$,15A\e(B) (eq last-char ?\e$,15B\e(B))
583 (setq last-modifier t)))
584 (goto-char (point-min))
585 ;; Special rule 2. -- preceding "r halant" must be modifier.
586 (when (looking-at "\e$,15p6-\e(B.")
587 (setq preceding-r t)
588 (goto-char (+ 2 (point))))
589 ;; translate the rest characters into glyphs
6b61353c
KH		 590 (while (re-search-forward dev-char-glyph-regexp nil t)
591 (setq match-str (match-string 0))
592 (setq glyph-str
593 (concat glyph-str
594 (gethash match-str dev-char-glyph-hash)))
595 ;; count the number of consonant-glyhs.
596 (if (string-match devanagari-consonant match-str)
597 (setq cons-num (1+ cons-num))))
0b520940
DL		 598 ;; preceding-r must be attached before the anuswar if exists.
599 (if preceding-r
600 (if last-modifier
601 (setq glyph-str (concat (substring glyph-str 0 -1)
602 "\e$,4"'\e(B" (substring glyph-str -1)))
603 (setq glyph-str (concat glyph-str "\e$,4"'\e(B"))))
604 (if last-halant (setq glyph-str (concat glyph-str "\e$,4""\e(B")))
605 ;;; *** glyph-to-glyph conversion ***
606 (when (string-match dev-glyph-glyph-regexp glyph-str)
607 (setq glyph-str
608 (replace-match (gethash (match-string 0 glyph-str)
609 dev-glyph-glyph-hash)
610 nil t glyph-str))
611 (if (and (> cons-num 1)
612 (string-match dev-glyph-glyph-2-regexp glyph-str))
613 (setq glyph-str
614 (replace-match (gethash (match-string 0 glyph-str)
615 dev-glyph-glyph-2-hash)
616 nil t glyph-str))))
617 ;;; *** glyph reordering ***
618 (while (setq split-pos (string-match "\e$,4""\e(B\\|.$" glyph-str))
619 (setq glyph-block (substring glyph-str 0 (1+ split-pos)))
620 (setq glyph-str (substring glyph-str (1+ split-pos)))
621 (setq
622 glyph-block
623 (if (string-match dev-glyph-right-modifier-regexp glyph-block)
624 (sort (string-to-list glyph-block)
625 (function (lambda (x y)
626 (< (get-char-code-property x 'composition-order)
627 (get-char-code-property y 'composition-order)))))
628 (sort (string-to-list glyph-block)
629 (function (lambda (x y)
630 (let ((xo (get-char-code-property x 'composition-order))
631 (yo (get-char-code-property y 'composition-order)))
632 (if (= xo 2) nil (if (= yo 2) t (< xo yo)))))))))
633 (setq glyph-str-list (nconc glyph-str-list glyph-block)))
634 ;; concatenate and attach reference-points.
635 (setq glyph-str
636 (cdr
637 (apply
638 'nconc
639 (mapcar
640 (function (lambda (x)
641 (list
642 (or (get-char-code-property x 'reference-point)
643 '(5 . 3) ;; default reference point.
644 )
645 x)))
646 glyph-str-list))))))
77539682 647 (compose-region from to glyph-str)))
4ed46869 648
650e8505 649(provide 'devan-util)
02ed5b47 650
6b61353c 651;;; arch-tag: 9bc4d6e3-f2b9-4110-886e-ff9b66b7eebc
02ed5b47 652;;; devan-util.el ends here
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