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e8af40ee 1;;; devan-util.el --- support for Devanagari Script Composition
4ed46869 2
a604c5af 3;; Copyright (C) 1996, 2001 Free Software Foundation, Inc.
4ed46869
KH		 4
5;; Author: KAWABATA, Taichi <kawabata@is.s.u-tokyo.ac.jp>
6
7;; Keywords: multilingual, Indian, Devanagari
8
9;; This file is part of GNU Emacs.
10
11;; GNU Emacs is free software; you can redistribute it and/or modify
12;; it under the terms of the GNU General Public License as published by
13;; the Free Software Foundation; either version 2, or (at your option)
14;; any later version.
15
16;; GNU Emacs is distributed in the hope that it will be useful,
17;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19;; GNU General Public License for more details.
20
21;; You should have received a copy of the GNU General Public License
e803d6bd
KH		 22;; along with GNU Emacs; see the file COPYING. If not, write to the
23;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24;; Boston, MA 02111-1307, USA.
4ed46869
KH		 25
26;;; Commentary:
27
28;; History:
29;; 1996.10.18 written by KAWABATA, Taichi <kawabata@is.s.u-tokyo.ac.jp>
37cdc7ad
KH		 30;; 1997.3.24 fixed some bugs.
31
32;; Future work ::
33;; Decompose the input characters and process them on the character basis.
4ed46869
KH		 34
35;; Devanagari script composition rules and related programs.
36
37;;; Code:
38
39;;;
40;;; Steps toward composition of Devanagari Characters.
41;;;
45717142 42
4ed46869
KH		 43;;; Basic functions.
44
45;;;###autoload
31ce7719
KH		 46(defun indian-to-devanagari (char)
47 "Convert IS 13194 character CHAR to Devanagari basic characters.
48If CHAR is not IS 13194, return CHAR as is."
49 (let ((charcodes (split-char char)))
4ed46869
KH		 50 (if (eq (car charcodes) 'indian-is13194)
51 (make-char 'indian-2-column ?\x21 (nth 1 charcodes))
31ce7719 52 char)))
4ed46869
KH		 53
54;;;###autoload
31ce7719
KH		 55(defun devanagari-to-indian (char)
56 "Convert Devanagari basic character CHAR to IS 13194 characters.
57If CHAR is not Devanagari basic character, return CHAR as is."
58 (let ((charcodes (split-char char)))
4ed46869
KH		 59 (if (and (eq (car charcodes) 'indian-2-column)
60 (= (nth 1 charcodes) ?\x21))
61 (make-char 'indian-is13194 (nth 2 charcodes))
31ce7719 62 char)))
4ed46869
KH		 63
64;;;###autoload
65(defun indian-to-devanagari-region (from to)
31ce7719
KH		 66 "Convert IS 13194 characters in region to Devanagari basic characters.
67When called from a program, expects two arguments,
68positions (integers or markers) specifying the region."
4ed46869 69 (interactive "r")
31ce7719
KH		 70 (save-excursion
71 (goto-char from)
72 (while (< (point) to)
73 (let ((char (following-char)))
74 (if (eq (char-charset char) 'indian-is13194)
75 (progn
76 (delete-char 1)
77 (insert (indian-to-devanagari char)))
78 (forward-char 1))))))
4ed46869
KH		 79
80;;;###autoload
81(defun devanagari-to-indian-region (from to)
31ce7719
KH		 82 "Convert Devanagari basic characters in region to Indian characters.
83When called from a program, expects two arguments,
84positions (integers or markers) specifying the region."
4ed46869 85 (interactive "r")
31ce7719
KH		 86 (save-excursion
87 (goto-char from)
88 (while (< (point) to)
89 (let ((char (following-char)))
90 (if (eq (char-charset char) 'indian-2-column)
91 (progn
49e4e3c6 92 (delete-char 1)
31ce7719
KH		 93 (insert (devanagari-to-indian char)))
94 (forward-char 1))))))
4ed46869
KH		 95
96;;;###autoload
31ce7719
KH		 97(defun indian-to-devanagari-string (string)
98 "Convert Indian characters in STRING to Devanagari Basic characters."
99 (let* ((len (length string))
27463ede
KH		 100 (i 0)
101 (vec (make-vector len 0)))
102 (while (< i len)
31ce7719 103 (aset vec i (indian-to-devanagari (aref string i)))
27463ede
KH		 104 (setq i (1+ i)))
105 (concat vec)))
4ed46869
KH		 106
107;; Phase 0 - Determine whether the characters can be composed.
108;;
109;;;
110;;; Regular expressions to split characters for composition.
111;;;
112;;
113;; Indian script word contains one or more syllables.
114;; In BNF, it can be expressed as follows:
115;;
116;; Word ::= {Syllable} [Cons-Syllable]
117;; Syllable ::= Cons-Vowel-Syllable | Vowel-Syllable
118;; Vowel-Syllable ::= V[D]
119;; Cons-Vowel-Syllable ::= [Cons-Syllable] Full-Cons [M] [D]
bd09f27b 120;; Cons-Syllable ::= [Pure-Cons] [Pure-Cons] [Pure-Cons] Pure-Cons
4ed46869
KH		 121;; Pure-Cons ::= Full-Cons H
122;; Full-Cons ::= C [N]
123;;
124;; {} repeat, [] optional
125;;
126;; C - Consonant (\e$(5!3!4!5!6!7!8!9!:!;!<!=!>!?!@!A!B!C!D!E\e(B
127;; \e$(5!F!G!H!I!J!K!L!M!N!O!P!Q!R!S!T!U!V!W!X\e(B)
128;; N - Nukta (\e$(5!i\e(B)
bd09f27b
KH		 129;; H - Halant(\e$(5!h\e(B) or Virama
130;; V - Vowel (\e$(5!$!%!&!'!(!)!*!+!,!-!.!/!0!1!2#&#'#*\e(B)
131;; ("\e$(5#&#'#*\e(B" can be obtained by IS13194 vowels with nukta.)
37cdc7ad
KH		 132;; D - Vowel Modifiers, i.e. Anuswar, Chandrabindu (\e$(5!!!"\e(B)
133;; (Visaraga (\e$(5!#\e(B) is excluded.)
bd09f27b
KH		 134;; M - Matra (\e$(5!Z![!\!]!^!_!`!a!b!c!d!e!f!g#K#L#M\e(B)
135;; ("\e$(5#K#L#M\e(B" can be obtained by IS13194 matras with nukta.)
4ed46869 136;;
37cdc7ad
KH		 137;; In Emacs, one syllable of Indian language is considered to be one
138;; composite glyph. If we expand the above expression for
139;; cons-vowel-syllable, it would be:
4ed46869 140;;
37cdc7ad 141;; [[C [N] H] [C [N] H] [C [N] H] C [N] H] C [N] [M] [D]
4ed46869 142;;
37cdc7ad 143;; Therefore, in worst case, the one syllable may contain
4ed46869
KH		 144;; following characters.
145;;
bd09f27b
KH		 146;; C N H C N H C N H C N H C N M D
147;;
37cdc7ad
KH		 148;; The example is a sanskrit word "kArtsnya", where five consecutive
149;; consonants appear.
4ed46869 150;;
37cdc7ad
KH		 151;; On the other hand, consonant-syllable, which appears at the end of
152;; the word, would have the following expression:
4ed46869 153;;
bd09f27b 154;; [C [N] H] [C [N] H] [C [N] H] C [N] H
4ed46869
KH		 155;;
156;; This is acceptable BEFORE proper consonant-syllable is input. The
157;; string which doesn't match with the above expression is invalid and
158;; thus must be fixed.
159;;
160;; Note:
907c83c8 161;; Third case can be considered, which is an acceptable syllable and can
4ed46869
KH		 162;; not add any code more.
163;;
bd09f27b 164;; [[C [N] H] [C [N] H] [C [N] H] C [N] H] C [N] [M] D
4ed46869
KH		 165;;
166;; However, to make editing possible even in this condition, we will
167;; not consider about this case.
37cdc7ad
KH		 168;;
169;; Note:
170;; Currently, it seems that the only following consonants would have
171;; Nukta sign attatched.
172;; (\e$(5!3!4!5!:!?!@!I\e(B)
173;; Therefore, [\e$(5!3\e(B-\e$(5!X\e(B]\e$(5!i\e(B? can be re-written as
174;; \\([\e$(5!3!4!5!:!?!@!I\e(B]\e$(5!i\e(B\\)\\|[\e$(5!3\e(B-\e$(5!X\e(B]
175
176(defconst devanagari-full-cons
177 "\\(\\([\e$(5!3!4!5!:!?!@!I\e(B]\e$(5!i\e(B\\)\\|[\e$(5!3\e(B-\e$(5!X$.$E"%\e(B]\\)"
178 "Devanagari full consonant")
179
180(defconst devanagari-pure-cons
181 (concat "\\(" devanagari-full-cons "\e$(5!h\e(B\\)")
182 "Devanagari pure consonant")
183
184(defconst devanagari-matra
185 "\\(\\([\e$(5!_![!\\e(B]\e$(5!i\e(B\\)\\|[\e$(5!Z\e(B-\e$(5!g#K#L#M\e(B]\\)"
186 "Devanagari Matra Signs. '\e$(5#K#L#M\e(B' can also be created from the combination
187of '\e$(5!_![!\\e(B' and nukta sign.")
188
189(defconst devanagari-vowel
190 "\\(\\([\e$(5!*!&!'\e(B]\e$(5!i\e(B\\)\\|[\e$(5!$\e(B-\e$(5!2#&#'#*\e(B]\\)"
191 "Devanagari Vowels. '\e$(5#&#'#*\e(B' can also be created from the combination
192of '\e$(5!*!&!'\e(B' and nukta sign.")
193
194(defconst devanagari-vowel-syllable
195 (concat devanagari-vowel "[\e$(5!!!"\e(B]?")
196 "Devanagari vowel syllable.")
197
198(defconst devanagari-cons-syllable
199 (concat devanagari-pure-cons "?" devanagari-pure-cons "?"
200 devanagari-pure-cons "?" devanagari-pure-cons "$")
201 "Devanagari consonant syllable")
202
203(defconst devanagari-cons-vowel-syllable
204 (concat "\\("
205 devanagari-pure-cons "?" devanagari-pure-cons "?"
206 devanagari-pure-cons "?" devanagari-pure-cons "\\)?"
207 devanagari-full-cons devanagari-matra "?[\e$(5!!!"\e(B]?")
208 "Devanagari consonant vowel syllable.")
4ed46869
KH		 209
210;;
211;; Also, digits and virams should be processed other than syllables.
212;;
213;; In IS 13194, Avagrah is obtained by Nukta after Viram, and
214;; OM is obtained by Nukta after Chandrabindu
215;;
37cdc7ad
KH		 216
217(defconst devanagari-digit-viram-visarga
bb6c9254
KH		 218 "[\e$(5!q\e(B-\e$(5!z!j!#\e(B]")
219
37cdc7ad 220(defconst devanagari-other-sign
bd09f27b 221 "\\([\e$(5!!!j\e(B]\e$(5!i\e(B\\)\\|\\([\e$(5#!#J\e(B]\\)")
4ed46869 222
37cdc7ad
KH		 223(defconst devanagari-composite-glyph-unit
224 (concat "\\(" devanagari-cons-syllable
225 "\\)\\|\\(" devanagari-vowel-syllable
37cdc7ad 226 "\\)\\|\\(" devanagari-cons-vowel-syllable
bb6c9254
KH		 227 "\\)\\|\\(" devanagari-other-sign
228 "\\)\\|\\(" devanagari-digit-viram-visarga "\\)")
4ed46869
KH		 229 "Regexp matching to Devanagari string to be composed form one glyph.")
230
231;;(put-charset-property charset-devanagari-1-column
232;; 'char-to-glyph 'devanagari-compose-string)
233;;(put-charset-property charset-devanagari-2-column
234;; 'char-to-glyph 'devanagari-compose-string)
235
236;; Sample
237;;
37cdc7ad
KH		 238;;(string-match devanagari-cons-vowel-syllable-examine "\e$(5!X![\e(B") => 0
239;;(string-match devanagari-cons-vowel-syllable-examine "\e$(5!F!h!D!\\e(B") => 0
240;;(string-match devanagari-cons-vowel-syllable-examine "\e$(5!X![!F!h!D!\\e(B") => 0
4ed46869
KH		 241
242;;
243;; Steps toward the composition
37cdc7ad 244;; Converting Character Codes to Composite Glyph.
4ed46869
KH		 245;;
246;; Example : \e$(5!X![\e(B/\e$(5!F!h!D!\\e(B
247;;
248;; First, convert Characters to appropriate glyphs.
249;;
250;; => \e$(5!X![\e(B/\e$(5"F!D!\\e(B
251;;
252;; Then, determine the base glyph, apply-orders and apply-rules.
253;;
254;; => \e$(5!X\e(B (ml.mr) \e$(5![\e(B / \e$(5!D\e(B (ml.mr) \e$(5"F\e(B (mr ml) \e$(5!\\e(B
255;;
256;; Finally, convert 2-column glyphs to 1-column glyph
257;; if such a glyph exist.
258;;
31ce7719 259;; => \e$(6!X\e(B (ml.mr) \e$(6![\e(B / \e$(6!D\e(B (ml.mr) \e$(6"F\e(B (mr ml) \e$(6!\\e(B
4ed46869
KH		 260;;
261;; Compose the glyph.
262;;
31ce7719
KH		 263;; => \e4\e$(6!Xt%![\e0!X![\e1\e(B/\e4\e$(6!Dt%"Fv#!\\e0!D"F!\\e1\e(B
264;; => \e4\e$(6!Xt%![\e0!X![\e1\e4!Dt%"Fv#!\\e0!D"F!\\e1\e(B
4ed46869
KH		 265;;
266
267;;
268;; Phase 1: Converting Character Code to Glyph Code.
269;;
270;;
271;; IMPORTANT:
31ce7719 272;; There may be many rules that you many want to suppress.
4ed46869
KH		 273;; In that case, please comment out that rule.
274;;
275;; RULES WILL BE EVALUATED FROM FIRST TO LAST.
276;; PUT MORE SPECIFIC RULES FIRST.
277;;
278;; TO DO:
279;; Prepare multiple specific list of rules for each languages
31ce7719 280;; that adopt Devanagari script.
4ed46869
KH		 281;;
282
4ed46869
KH		 283(defconst devanagari-char-to-glyph-rules
284 '(
4ed46869
KH		 285
286 ;; `r' at the top of syllable and followed by other consonants.
37cdc7ad
KH		 287 ;; ("[^\e$(5!h\e(B]\\(\e$(5!O!h\e(B\\)[\e$(5!3\e(B-\e$(5!X\e(B]" "\e$(5"p\e(B")
288 ("^\\(\e$(5!O!h\e(B\\)[\e$(5!3\e(B-\e$(5!X\e(B]" "\e$(5"p\e(B")
4ed46869
KH		 289
290 ;; Ligature Rules
37cdc7ad
KH		 291 ("\\(\e$(5!3!h!B!h!O!h!M\e(B\\)" "\e$(5$!\e(B" sanskrit)
292 ("\\(\e$(5!3!h!B!h!T\e(B\\)" "\e$(5$"\e(B" sanskrit)
293 ("\\(\e$(5!3!h!B!h!M\e(B\\)" "\e$(5$#\e(B" sanskrit)
294 ("\\(\e$(5!3!h!F!h!M\e(B\\)" "\e$(5$$\e(B")
295 ("\\(\e$(5!3!h!O!h!M\e(B\\)" "\e$(5$%\e(B")
296 ("\\(\e$(5!3!h!O\e(B\\)" "\e$(5"#\e(B") ; Post "r"
297 ("\\(\e$(5!3!h!T!h!M\e(B\\)" "\e$(5$&\e(B" sanskrit)
298 ("\\(\e$(5!3!h\e(B\\)\e$(5!3!h\e(B[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"3\e(B") ; Special Half Form
299 ("\\(\e$(5!3!h!3\e(B\\)" "\e$(5$'\e(B")
300 ("\\(\e$(5!3!h\e(B\\)\e$(5!B!h!O\e(B" "\e$(5"3\e(B") ; Special Rules for "k-tr"
301 ("\\(\e$(5!3!h!B\e(B\\)" "\e$(5$(\e(B")
302 ("\\(\e$(5!3!h!F\e(B\\)" "\e$(5$)\e(B")
303 ("\\(\e$(5!3!h!L\e(B\\)" "\e$(5$*\e(B")
304 ("\\(\e$(5!3!h!M\e(B\\)" "\e$(5$+\e(B")
305 ("\\(\e$(5!3!h!Q\e(B\\)" "\e$(5$,\e(B")
306 ("\\(\e$(5!3!h!T\e(B\\)" "\e$(5$-\e(B")
307 ("\\(\e$(5!3!h!V!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"l\e(B") ; Half Form
308 ("\\(\e$(5$.!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"l\e(B") ; Half Form
309 ("\\(\e$(5!3!h!V\e(B\\)" "\e$(5$.\e(B")
310 ("\\(\e$(5!3!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"3\e(B") ; Half Form
311 ("\\(\e$(5!3!i!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"s\e(B") ; Nukta Half Form
312 ("\\(\e$(5!3!i\e(B\\)" "\e$(5#3\e(B") ; Nukta
313 ("\\(\e$(5!4!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"4\e(B") ; Half Form
314 ("\\(\e$(5!4!i!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"t\e(B") ; Nukta Half Form
315 ("\\(\e$(5!4!i\e(B\\)" "\e$(5#4\e(B") ; Nukta
316 ("\\(\e$(5!5!h!O!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"`\e(B") ; Half Form
317 ("\\(\e$(5!5!h!O\e(B\\)" "\e$(5"$\e(B") ; Post "r"
318 ("\\(\e$(5!5!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"5\e(B") ; Half Form
319 ("\\(\e$(5!5!i!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"u\e(B") ; Nukta Half Form
320 ("\\(\e$(5!5!i\e(B\\)" "\e$(5#5\e(B") ; Nukta
321 ("\\(\e$(5!6!h!F!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"a\e(B") ; Half Form
322 ("\\(\e$(5!6!h!F\e(B\\)" "\e$(5$/\e(B")
323 ; Slot
324 ("\\(\e$(5!6!h!O\e(B\\)" "\e$(5!6"q\e(B") ; Post "r"
325 ("\\(\e$(5!6!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"6\e(B") ; Half Form
326 ("\\(\e$(5!7!h!3!h!B!h!M\e(B\\)" "\e$(5$0\e(B" sanskrit)
327 ("\\(\e$(5!7!h!3!h!V!h!T\e(B\\)" "\e$(5$1\e(B" sanskrit)
328 ("\\(\e$(5!7!h!3!h!B\e(B\\)" "\e$(5$2\e(B" sanskrit)
329 ("\\(\e$(5!7!h!3!h!V\e(B\\)" "\e$(5$3\e(B" sanskrit)
330 ("\\(\e$(5!7!h!3!h!O\e(B\\)" "\e$(5$9"q\e(B") ; Special Rule. May be precomposed font needed.
331 ("\\(\e$(5!7!h!6!h!O\e(B\\)" "\e$(5$4\e(B" sanskrit)
332 ("\\(\e$(5!7!h!3!h!M\e(B\\)" "\e$(5$5\e(B" sanskrit)
333 ("\\(\e$(5!7!h!4!h!M\e(B\\)" "\e$(5$6\e(B" sanskrit)
334 ("\\(\e$(5!7!h!5!h!M\e(B\\)" "\e$(5$7\e(B" sanskrit)
335 ("\\(\e$(5!7!h!6!h!M\e(B\\)" "\e$(5$8\e(B" sanskrit)
336 ("\\(\e$(5!7!h!3\e(B\\)" "\e$(5$9\e(B")
337 ("\\(\e$(5!7!h!4\e(B\\)" "\e$(5$:\e(B")
338 ("\\(\e$(5!7!h!5!h!O\e(B\\)" "\e$(5$;"q\e(B") ; Special Rule. May be precomposed font needed.
339 ("\\(\e$(5!7!h!5\e(B\\)" "\e$(5$;\e(B")
340 ("\\(\e$(5!7!h!6\e(B\\)" "\e$(5$<\e(B")
341 ("\\(\e$(5!7!h!7\e(B\\)" "\e$(5$=\e(B")
342 ("\\(\e$(5!7!h!F\e(B\\)" "\e$(5$>\e(B")
343 ("\\(\e$(5!7!h!L\e(B\\)" "\e$(5$?\e(B")
344 ("\\(\e$(5!7!h!M\e(B\\)" "\e$(5$@\e(B")
345 ("\\(\e$(5!8!h\e(B\\)[\e$(5!8!<\e(B]\e$(5!h\e(B" "\e$(5"8\e(B") ; Half Form
346 ("\\(\e$(5!8!h!8\e(B\\)" "\e$(5$A\e(B")
347 ("\\(\e$(5!8!h!<\e(B\\)" "\e$(5$B\e(B")
348 ("\\(\e$(5!8!h!O!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"8"q\e(B") ; Half Form Post "r"
349 ("\\(\e$(5!8!h!O\e(B\\)" "\e$(5!8"q\e(B") ; Post "r"
350 ("\\(\e$(5!8!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"8\e(B") ; Half Form
351 ("\\(\e$(5!9!h!M\e(B\\)" "\e$(5$C\e(B")
352 ("\\(\e$(5!:!h!O\e(B\\)" "\e$(5$D\e(B")
353 ("\\(\e$(5!:!h!<!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"m\e(B") ; Half Form
354 ("\\(\e$(5!:!h!<\e(B\\)" "\e$(5$E\e(B")
355 ("\\(\e$(5!:!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5":\e(B") ; Half Form
356 ("\\(\e$(5!:!i!h!O\e(B\\)" "\e$(5"!\e(B") ; Nukta Post "r"
357 ("\\(\e$(5!:!i!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"z\e(B") ; Nukta Half Form
358 ("\\(\e$(5!:!i\e(B\\)" "\e$(5#:\e(B") ; Nukta
359 ("\\(\e$(5!;!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5";\e(B") ; Half Form
360 ("\\(\e$(5!<!h\e(B\\)\e$(5!8!h\e(B[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"<\e(B") ; Special Half Form
361 ("\\(\e$(5!<!h!8\e(B\\)" "\e$(5$F\e(B")
362 ("\\(\e$(5!<!h\e(B\\)\e$(5!:!h\e(B[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"<\e(B") ; Special Half Form
363 ("\\(\e$(5!<!h!:\e(B\\)" "\e$(5$G\e(B")
364 ("\\(\e$(5!<!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"<\e(B") ; Half Form
365 ("\\(\e$(5!=!h!3\e(B\\)" "\e$(5$H\e(B")
366 ("\\(\e$(5!=!h!=\e(B\\)" "\e$(5$I\e(B")
367 ("\\(\e$(5!=!h!>\e(B\\)" "\e$(5$J\e(B")
368 ("\\(\e$(5!=!h!M\e(B\\)" "\e$(5$K\e(B")
369 ("\\(\e$(5!>!h!M\e(B\\)" "\e$(5$L\e(B")
370 ("\\(\e$(5!?!h!5!h!M\e(B\\)" "\e$(5$M\e(B" sanskrit)
371 ("\\(\e$(5!?!h!6!h!O\e(B\\)" "\e$(5$N\e(B" sanskrit)
372 ("\\(\e$(5!?!h!O!h!M\e(B\\)" "\e$(5$O\e(B")
373 ("\\(\e$(5!?!h!5\e(B\\)" "\e$(5$P\e(B")
374 ("\\(\e$(5!?!h!6\e(B\\)" "\e$(5$Q\e(B")
375 ("\\(\e$(5!?!h!?\e(B\\)" "\e$(5$R\e(B")
376 ("\\(\e$(5!?!h!L\e(B\\)" "\e$(5$S\e(B")
377 ("\\(\e$(5!?!h!M\e(B\\)" "\e$(5$T\e(B")
378 ("\\(\e$(5!?!i\e(B\\)" "\e$(5#?\e(B") ; Nukta
379 ("\\(\e$(5!@!h!M\e(B\\)" "\e$(5$`\e(B")
380 ("\\(\e$(5!@!i\e(B\\)" "\e$(5#@\e(B") ; Nukta
381 ("\\(\e$(5!A!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"A\e(B") ; Half Form
382 ("\\(\e$(5!B!h\e(B\\)\e$(5!B!h!O\e(B" "\e$(5"B\e(B") ; Special Rule for "t-tr"
383 ("\\(\e$(5!B!h!B!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"c\e(B") ; Half Form
384 ("\\(\e$(5!B!h!B\e(B\\)" "\e$(5$a\e(B")
385 ("\\(\e$(5!B!h!F\e(B\\)" "\e$(5$b\e(B")
386 ("\\(\e$(5!B!h!O!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"d\e(B") ; Half Form Post "r"
387 ("\\(\e$(5!B!h!O\e(B\\)" "\e$(5"%\e(B") ; Post "r"
388 ("\\(\e$(5!B!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"B\e(B") ; Half Form
389 ("\\(\e$(5!C!h!O\e(B\\)" "\e$(5!C"q\e(B") ; Post "r"
390 ("\\(\e$(5!C!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"C\e(B") ; Half Form
391 ("\\(\e$(5!D!h!D!h!M\e(B\\)" "\e$(5$c\e(B")
392 ("\\(\e$(5!D!h!E!h!M\e(B\\)" "\e$(5$d\e(B")
393 ("\\(\e$(5!D!h!K!h!M\e(B\\)" "\e$(5$e\e(B")
394 ("\\(\e$(5!D!h!K!h!O\e(B\\)" "\e$(5$r"r\e(B") ; Special Case for "dbhr" ; ***
395 ("\\(\e$(5!D!h!O!h!M\e(B\\)" "\e$(5$f\e(B")
396 ("\\(\e$(5!D!h!T!h!M\e(B\\)" "\e$(5$g\e(B")
397 ("\\(\e$(5!D!h!5!h!O\e(B\\)" "\e$(5$h\e(B")
398 ("\\(\e$(5!D!h!6!h!O\e(B\\)" "\e$(5$i\e(B")
399 ("\\(\e$(5!D!h!D!h!T\e(B\\)" "\e$(5$j\e(B")
400 ("\\(\e$(5!D!h!E!h!T\e(B\\)" "\e$(5$k\e(B")
401 ("\\(\e$(5!D!h\e(B\\)\e$(5!E!h\e(B[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5!D!h\e(B") ; Special Half Form (for ddhra)
402 ("\\(\e$(5!D!h!5\e(B\\)" "\e$(5$l\e(B")
403 ("\\(\e$(5!D!h!6\e(B\\)" "\e$(5$m\e(B")
404 ("\\(\e$(5!D!h!D\e(B\\)" "\e$(5$n\e(B")
405 ("\\(\e$(5!D!h!E\e(B\\)" "\e$(5$o\e(B")
406 ("\\(\e$(5!D!h!F\e(B\\)" "\e$(5$p\e(B")
407 ("\\(\e$(5!D!h\e(B\\)\e$(5!J!h\e(B" "\e$(5!D!h\e(B") ; Suppressing "db-"
408 ("\\(\e$(5!D!h!J\e(B\\)" "\e$(5$q\e(B")
409 ("\\(\e$(5!D!h!K\e(B\\)" "\e$(5$r\e(B")
410 ("\\(\e$(5!D!h!L\e(B\\)" "\e$(5$s\e(B")
411 ("\\(\e$(5!D!h!M\e(B\\)" "\e$(5$t\e(B")
412 ("\\(\e$(5!D!h!T\e(B\\)" "\e$(5$u\e(B")
413 ("\\(\e$(5!E!h!F!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"e\e(B") ; Half Form
414 ("\\(\e$(5!E!h!F\e(B\\)" "\e$(5$v\e(B")
415 ("\\(\e$(5!E!h!O!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"f\e(B") ; Half Form Post "r"
416 ("\\(\e$(5!E!h!O\e(B\\)" "\e$(5!E"q\e(B") ; Post "r"
417 ("\\(\e$(5!E!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"E\e(B") ; Half Form
418 ("\\(\e$(5!F!h!F!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"k\e(B") ; Half Form
419 ("\\(\e$(5!F!h!F\e(B\\)" "\e$(5$w\e(B")
420 ("\\(\e$(5!F!h!O\e(B\\)" "\e$(5!F"q\e(B")
421 ("\\(\e$(5!F!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"F\e(B") ; Half Form
422 ("\\(\e$(5!G!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"G\e(B") ; Nukta Half Form
423 ("\\(\e$(5!H!h\e(B\\)\e$(5!B!h!O\e(B" "\e$(5"H\e(B") ; Special Rule for "p-tr"
424 ("\\(\e$(5!H!h!B!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"g\e(B") ; Half Form
425 ("\\(\e$(5!H!h!B\e(B\\)" "\e$(5$x\e(B")
426 ("\\(\e$(5!H!h!F\e(B\\)" "\e$(5$y\e(B")
427 ("\\(\e$(5!H!h!Q\e(B\\)" "\e$(5$z\e(B")
428 ("\\(\e$(5!H!h!O\e(B\\)" "\e$(5"&\e(B") ; Post "r"
429 ("\\(\e$(5!H!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"H\e(B") ; Half Form
430 ("\\(\e$(5!I!h!O\e(B\\)" "\e$(5"'\e(B") ; Post "r"
431 ("\\(\e$(5!I!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"I\e(B") ; Half Form
432 ("\\(\e$(5!I!i!h!O\e(B\\)" "\e$(5""\e(B") ; Nukta Post "r"
433 ("\\(\e$(5!I!i!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"y\e(B") ; Nukta Half Form
434 ("\\(\e$(5!I!i\e(B\\)" "\e$(5#I\e(B") ; Nukta
435 ("\\(\e$(5!J!h\e(B\\)\e$(5!F!h\e(B[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"J\e(B") ; Special Half Form
436 ("\\(\e$(5!J!h!F\e(B\\)" "\e$(5${\e(B")
437 ("\\(\e$(5!J!h\e(B\\)\e$(5!J!h\e(B[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"J\e(B") ; Special Half Form
438 ("\\(\e$(5!J!h!J\e(B\\)" "\e$(5$|\e(B")
439 ("\\(\e$(5!J!h\e(B\\)\e$(5!T!h\e(B[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"J\e(B") ; Special Half Form
440 ("\\(\e$(5!J!h!T\e(B\\)" "\e$(5$}\e(B")
441 ("\\(\e$(5!J!h!O\e(B\\)" "\e$(5!J"q\e(B") ; Post "r"
442 ("\\(\e$(5!J!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"J\e(B") ; Half Form
443 ("\\(\e$(5!K!h!F\e(B\\)" "\e$(5$~\e(B")
444 ("\\(\e$(5!K!h!O\e(B\\)" "\e$(5!K"q\e(B") ; Post "r"
445 ("\\(\e$(5!K!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"K\e(B") ; Half Form
446 ("\\(\e$(5!L!h!F\e(B\\)" "\e$(5#P\e(B")
447 ("\\(\e$(5!L!h!Q\e(B\\)" "\e$(5#Q\e(B")
448 ("\\(\e$(5!L!h!O\e(B\\)" "\e$(5!L"q\e(B") ; Post "r"
449 ("\\(\e$(5!L!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"L\e(B") ; Half Form
450 ("\\(\e$(5!M!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"M\e(B") ; Half Form
451 ("\\(\e$(5!N!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"N\e(B") ; Half Form
452 ;; special form for "ru".
453 ("\\(\e$(5!O!]\e(B\\)" "\e$(5",\e(B")
454 ("\\(\e$(5!O!^\e(B\\)" "\e$(5"-\e(B")
455 ("\\(\e$(5!P!]\e(B\\)" "\e$(5".\e(B")
456 ("\\(\e$(5!P!^\e(B\\)" "\e$(5"/\e(B")
4ed46869 457 ;;
37cdc7ad
KH		 458 ("\\(\e$(5!Q!h!Q\e(B\\)" "\e$(5#`\e(B" sanskrit)
459 ("\\(\e$(5!Q!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"Q\e(B") ; Half Form
460 ("\\(\e$(5!R!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"R\e(B") ; Half Form
461 ("\\(\e$(5!S!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"S\e(B") ; Half Form
462 ("\\(\e$(5!T!h!F\e(B\\)" "\e$(5#a\e(B")
463 ("\\(\e$(5!T!h!T\e(B\\)" "\e$(5#b\e(B")
464 ("\\(\e$(5!T!h!O\e(B\\)" "\e$(5!T"q\e(B") ; Post "r"
465 ("\\(\e$(5!T!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"T\e(B") ; Half Form
466 ("\\(\e$(5!U!h!8!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"h\e(B") ; Half Form
467 ("\\(\e$(5!U!h!8\e(B\\)" "\e$(5#c\e(B")
468 ("\\(\e$(5!U!h!F\e(B\\)" "\e$(5#d\e(B")
469 ("\\(\e$(5!U!h!J\e(B\\)" "\e$(5#e\e(B")
470 ("\\(\e$(5!U!h!Q\e(B\\)" "\e$(5#f\e(B")
471 ("\\(\e$(5!U!h\e(B\\)\e$(5!T!h!O\e(B" "\e$(5"U\e(B") ; Special Half Form
472 ("\\(\e$(5!U!h!T!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"j\e(B") ; Half Form
473; ("\\(\e$(5!U!h!T\e(B\\)" "\e$(5#g\e(B")
474 ("\\(\e$(5!U!h!O!h!T\e(B\\)" "\e$(5#g\e(B")
475 ("\\(\e$(5!U!h!O!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"i\e(B") ; Half Form
476 ("\\(\e$(5!U!h!O\e(B\\)" "\e$(5")\e(B") ; Post "r"
477 ("\\(\e$(5!U!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"U\e(B") ; Half Form
478 ("\\(\e$(5!V!h!=!h!O!h!M\e(B\\)" "\e$(5#h\e(B")
479 ("\\(\e$(5!V!h!=!h!M\e(B\\)" "\e$(5#i\e(B")
480 ("\\(\e$(5!V!h!=!h!T\e(B\\)" "\e$(5#j\e(B")
481 ("\\(\e$(5!V!h!=\e(B\\)" "\e$(5#k\e(B")
482 ("\\(\e$(5!V!h!>\e(B\\)" "\e$(5#l\e(B")
483 ("\\(\e$(5!V!h!O\e(B\\)" "\e$(5!V"q\e(B") ; Post "r"
484 ("\\(\e$(5!V!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"V\e(B") ; Half Form
485 ("\\(\e$(5!W!h!F!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"W"F\e(B") ; Special Half Form
486 ("\\(\e$(5!W!h!F\e(B\\)" "\e$(5#m\e(B")
487 ("\\(\e$(5!W!h!O\e(B\\)" "\e$(5#n\e(B")
488 ("\\(\e$(5!W!h\e(B\\)[\e$(5!3\e(B-\e$(5!N!P\e(B-\e$(5!X\e(B]" "\e$(5"W\e(B") ; Half Form
489 ("\\(\e$(5!X!h!A\e(B\\)" "\e$(5#p\e(B")
490 ("\\(\e$(5!X!h!F\e(B\\)" "\e$(5#q\e(B")
491 ("\\(\e$(5!X!h!L\e(B\\)" "\e$(5#r\e(B")
492 ("\\(\e$(5!X!h!M\e(B\\)" "\e$(5#s\e(B")
493 ("\\(\e$(5!X!h!O\e(B\\)" "\e$(5#t\e(B")
494 ("\\(\e$(5!X!h!Q\e(B\\)" "\e$(5#u\e(B")
495 ("\\(\e$(5!X!h!T\e(B\\)" "\e$(5#v\e(B")
496 ;; Special Ligature Rules
497 ("\\(\e$(5!X!_\e(B\\)" "\e$(5#R\e(B")
4ed46869
KH		 498
499 ;; For consonants other than listed above, glyph-composition will
500 ;; be applied. If the consonant which is preceding "\e$(5!O\e(B" does not
501 ;; have the vertical line (such as "\e$(5!?\e(B"), "\e$(5"r\e(B" is put beneath the
502 ;; consonant.
503 ;;
37cdc7ad
KH		 504 ("[\e$(5!7!9!=!>!?!@!D!O!P!R!S!X\e(B]\\(\e$(5!h!O\e(B\\)" "\e$(5"r\e(B")
505 ("[\e$(5!6!8!C!E!F!H!J!K!L!M!T!V\e(B]\\(\e$(5!h!O\e(B\\)" "\e$(5"q\e(B")
506 ("\e$(5!?!i\e(B\\(\e$(5!h!O\e(B\\)" "\e$(5"r\e(B")
507 ("\e$(5!@!i\e(B\\(\e$(5!h!O\e(B\\)" "\e$(5"r\e(B")
508
509 ;; Nukta with Non-Consonants
510 ("\\(\e$(5!!!i\e(B\\)" "\e$(5#!\e(B")
511 ("\\(\e$(5!&!i\e(B\\)" "\e$(5#&\e(B")
512 ("\\(\e$(5!'!i\e(B\\)" "\e$(5#'\e(B")
513 ("\\(\e$(5!*!i\e(B\\)" "\e$(5#*\e(B")
514 ("\\(\e$(5![!i\e(B\\)" "\e$(5#L\e(B")
515 ("\\(\e$(5!\!i\e(B\\)" "\e$(5#M\e(B")
516 ("\\(\e$(5!_!i\e(B\\)" "\e$(5#K\e(B")
517 ("\\(\e$(5!j!i\e(B\\)" "\e$(5#J\e(B")
518
519 ;; Special rule for "r + some vowels"
bb6c9254
KH		 520 ("\\(\e$(5!O!_!i\e(B\\)" "\e$(5#*"p\e(B")
521 ("\\(\e$(5!O![!i\e(B\\)" "\e$(5#&"p\e(B")
522 ("\\(\e$(5!O!\!i\e(B\\)" "\e$(5#'"p\e(B")
37cdc7ad 523 ("\\(\e$(5!O!_\e(B\\)" "\e$(5!*"p\e(B")
bd09f27b 524 ;; If everything fails, "y" will connect to the front consonant.
37cdc7ad 525 ("\\(\e$(5!h!M\e(B\\)" "\e$(5"]\e(B")
4ed46869
KH		 526 )
527 "Alist of regexps of Devanagari character sequences vs composed characters.")
528
4ed46869
KH		 529(let ((rules devanagari-char-to-glyph-rules))
530 (while rules
531 (let ((rule (car rules))
37cdc7ad 532 (chars) (char) (glyphs) (glyph))
4ed46869
KH		 533 (setq rules (cdr rules))
534 (string-match "\\\\(\\(.+\\)\\\\)" (car rule))
535 (setq chars (substring (car rule) (match-beginning 1) (match-end 1)))
536 (setq char (string-to-char chars))
37cdc7ad
KH		 537 (setq glyphs (cdr rule))
538 (setq glyph (string-to-char (car glyphs)))
4ed46869 539 (put-char-code-property
37cdc7ad
KH		 540 char 'char-to-glyph
541 ;; We don't "cons" it since priority is top to down.
542 (append (get-char-code-property char 'char-to-glyph) (list rule)))
543
544 (if (and (< ?\e(5z\e(B glyph) ; Glyphs only.
545 (null (get-char-code-property glyph 'glyph-to-char)))
546 ; One glyph may corresponds to multiple characters,
547 ; e.g., surrounding vowel in Tamil, etc.
548 ; but for Devanagari, we put this restriction
549 ; to make sure the fact that one glyph corresponds to one char.
550 (put-char-code-property
551 glyph 'glyph-to-char
552 (cons (list (car glyphs) chars)
553 (get-char-code-property glyph 'glyph-to-char)
554 ))))))
4ed46869
KH		 555
556;;
37cdc7ad
KH		 557;; Function used in both characters-to-glyphs conversion and
558;; glyphs-to-characters conversion.
4ed46869
KH		 559;;
560
31ce7719
KH		 561(defun max-match-len (regexp)
562 "Return the maximum length of text that can match the pattern REGEXP.
563Only [...] pattern of regexp is recognized."
564 (let ((len 0)
565 (index 0))
566 (while (string-match "\\[\\([^\]]\\)+\\]" regexp index)
567 (setq len (+ len (- (match-beginning 0) index) 1)
568 index (match-end 0)))
569 len))
570
571;; Return t iff at least one member appears in both LIST1 and LIST2.
572(defun intersecting-p (list1 list2)
27463ede
KH		 573 (let ((found nil))
574 (while (and list1 (not found))
575 (if (memq (car list1) list2)
576 (setq found t)
577 (setq list1 (cdr list1))))
578 found))
579
31ce7719
KH		 580(defun string-conversion-by-rule (source symbol &rest specs)
581 "Convert string SOURCE by rules stored in SYMBOL property of each character.
582The remaining arguments forms a list SPECS that restricts applicable rules.
583
584The rules has the form ((REGEXP STR RULE-SPEC ...) ...).
585Each character sequence in STRING that matches REGEXP is
586replaced by STR.
587
588If SPECS is nil, only rules with no RULE-SPECs is applied. Otherwise
589rules with no RULE-SPECS and rules that have at least one member of
590SPECS in RULE-SPECs is applied.
591
592Rules are tested in the order of the list, thus more specific rules
593should be placed in front of less specific rules.
594
595If rule is given in the forms of regexp '...\\(...\\)...', a character
596sequence that matches the pattern inside of the parenthesis is the
597subject of the match. Otherwise, the entire expression is the subject
598of the match."
4ed46869
KH		 599 (let ((pos 0)
600 (dst-str ""))
31ce7719 601 (while (< pos (length source))
4ed46869
KH		 602 (let ((found nil)
603 (rules (get-char-code-property
604 (string-to-char
31ce7719 605 (substring source pos)) symbol)))
4ed46869
KH		 606 (while rules
607 (let* ((rule (car rules))
37cdc7ad
KH		 608 (regexp (car rule))
609 (replace-str (car (cdr rule)))
610 (rule-specs (cdr (cdr rule)))
611 search-pos)
612 (if (not (or (null rule-specs)
31ce7719 613 (intersecting-p specs rule-specs)))
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KH		 614 (setq rules (cdr rules))
615 (if (null (string-match "\\\\(.+\\\\)" regexp))
616 (progn
617 (setq regexp (concat "\\(" regexp "\\)"))
618 (setq search-pos pos))
619 (setq search-pos (- pos (max-match-len
620 (substring regexp
621 (string-match "^[^\\\\]*" regexp)
622 (match-end 0))))))
623 (if (< search-pos 0) (setq search-pos 0))
31ce7719 624 (if (string-match regexp source search-pos)
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KH		 625 (if (= (match-beginning 1) pos)
626 (progn
627 (setq dst-str (concat dst-str replace-str))
628 (setq rules nil) ; Get out of the loop.
629 (setq found t)
630 ;; proceed `pos' for replaced characters.
631 (setq pos (match-end 1)))
632 (setq rules (cdr rules)))
633 (setq rules (cdr rules))))))
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KH		 634 ;; proceed to next position
635 (if (not found)
31ce7719 636 (setq dst-str (concat dst-str (substring source pos (1+ pos)))
27463ede 637 pos (1+ pos)))))
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KH		 638 dst-str))
639
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KH		 640
641;;
642;; Convert Character Code to Glyph Code
643;;
644
645;;;###autoload
31ce7719
KH		 646(defun char-to-glyph-devanagari (string &rest langs)
647 "Convert Devanagari characters in STRING to Devanagari glyphs.
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KH		 648Ligatures and special rules are processed."
649 (apply
650 'string-conversion-by-rule
31ce7719 651 (append (list string 'char-to-glyph) langs)))
37cdc7ad 652
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KH		 653;; Example:
654;;(char-to-glyph-devanagari "\e$(5!X![!F!h!D!\\e(B") => "\e$(5!X!["F!D!\\e(B"
655;;(char-to-glyph-devanagari "\e$(5!O!Z!V!h!=!h!O![!M\e(B") => ???
656
657;;
658;; Phase 2: Compose Glyphs to form One Glyph.
659;;
660
31ce7719 661;; Each list consists of glyph, application-priority and application-direction.
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KH		 662;;
663;; Glyphs will be ordered from low priority number to high priority number.
664;; If application-priority is omitted, it is assumed to be 0.
665;; If application-direction is omitted, it is asumbed to be '(mr . ml).
666
667(defconst devanagari-composition-rules
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KH		 668 '((?\e$(5!!\e(B 0 (tr . br))
669 (?\e$(5!"\e(B 0 (mr . mr))
670 (?\e$(5!#\e(B 0)
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KH		 671 (?\e$(5!$\e(B 0)
672 (?\e$(5!%\e(B 0)
673 (?\e$(5!&\e(B 0)
674 (?\e$(5!'\e(B 0)
675 (?\e$(5!(\e(B 0)
676 (?\e$(5!)\e(B 0)
677 (?\e$(5!*\e(B 0)
678 (?\e$(5!+\e(B 0)
679 (?\e$(5!,\e(B 0)
680 (?\e$(5!-\e(B 0)
681 (?\e$(5!.\e(B 0)
682 (?\e$(5!/\e(B 0)
683 (?\e$(5!0\e(B 0)
684 (?\e$(5!1\e(B 0)
685 (?\e$(5!2\e(B 0)
686 (?\e$(5!3\e(B 0)
687 (?\e$(5!4\e(B 0)
688 (?\e$(5!5\e(B 0)
689 (?\e$(5!6\e(B 0)
690 (?\e$(5!7\e(B 0)
691 (?\e$(5!8\e(B 0)
692 (?\e$(5!9\e(B 0)
693 (?\e$(5!:\e(B 0)
694 (?\e$(5!;\e(B 0)
695 (?\e$(5!<\e(B 0)
696 (?\e$(5!=\e(B 0)
697 (?\e$(5!>\e(B 0)
698 (?\e$(5!?\e(B 0)
699 (?\e$(5!@\e(B 0)
700 (?\e$(5!A\e(B 0)
701 (?\e$(5!B\e(B 0)
702 (?\e$(5!C\e(B 0)
703 (?\e$(5!D\e(B 0)
704 (?\e$(5!E\e(B 0)
705 (?\e$(5!F\e(B 0)
706 (?\e$(5!G\e(B 0)
707 (?\e$(5!H\e(B 0)
708 (?\e$(5!I\e(B 0)
709 (?\e$(5!J\e(B 0)
710 (?\e$(5!K\e(B 0)
711 (?\e$(5!L\e(B 0)
712 (?\e$(5!M\e(B 0)
713 (?\e$(5!N\e(B 0)
714 (?\e$(5!O\e(B 0)
715 (?\e$(5!P\e(B 0)
716 (?\e$(5!Q\e(B 0)
717 (?\e$(5!R\e(B 0)
718 (?\e$(5!S\e(B 0)
719 (?\e$(5!T\e(B 0)
720 (?\e$(5!U\e(B 0)
721 (?\e$(5!V\e(B 0)
722 (?\e$(5!W\e(B 0)
723 (?\e$(5!X\e(B 0)
724 (?\e$(5!Y\e(B 0)
37cdc7ad
KH		 725 (?\e$(5!Z\e(B 0)
726 (?\e$(5![\e(B 0 (ml . mr))
727 (?\e$(5!\\e(B 0)
728 (?\e$(5!]\e(B 0 (br . tr))
729 (?\e$(5!^\e(B 0 (br . tr))
730 (?\e$(5!_\e(B 0 (br . tr))
731 (?\e$(5!`\e(B 0 (mr . mr)) ; (tc . bc)
732 (?\e$(5!a\e(B 0 (mr . mr))
733 (?\e$(5!b\e(B 0 (mr . mr))
734 (?\e$(5!c\e(B 0 (mr . mr))
735 (?\e$(5!d\e(B 0)
736 (?\e$(5!e\e(B 0)
737 (?\e$(5!f\e(B 0)
738 (?\e$(5!g\e(B 0)
bd09f27b
KH		 739 (?\e$(5!h\e(B 0 (br . tr))
740 (?\e$(5!i\e(B 0 (br . tr))
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KH		 741 (?\e$(5!j\e(B 0)
742 (nil 0)
743 (nil 0)
744 (nil 0)
745 (nil 0)
746 (nil 0)
747 (nil 0)
748 (?\e$(5!q\e(B 0)
749 (?\e$(5!r\e(B 0)
750 (?\e$(5!s\e(B 0)
751 (?\e$(5!t\e(B 0)
752 (?\e$(5!u\e(B 0)
753 (?\e$(5!v\e(B 0)
754 (?\e$(5!w\e(B 0)
755 (?\e$(5!x\e(B 0)
756 (?\e$(5!y\e(B 0)
757 (?\e$(5!z\e(B 0)
758 (nil 0)
759 (nil 0)
760 (nil 0)
761 (nil 0)
762 (?\e$(5"!\e(B 0)
763 (?\e$(5""\e(B 0)
764 (?\e$(5"#\e(B 0)
765 (?\e$(5"$\e(B 0)
766 (?\e$(5"%\e(B 0)
767 (?\e$(5"&\e(B 0)
768 (?\e$(5"'\e(B 0)
769 (?\e$(5"(\e(B 0)
770 (?\e$(5")\e(B 0)
771 (?\e$(5"*\e(B 0)
772 (?\e$(5"+\e(B 0)
773 (?\e$(5",\e(B 0)
774 (?\e$(5"-\e(B 0)
775 (?\e$(5".\e(B 0)
776 (?\e$(5"/\e(B 0)
777 (?\e$(5"0\e(B 0)
778 (?\e$(5"1\e(B 0)
779 (?\e$(5"2\e(B 0)
780 (?\e$(5"3\e(B 0)
781 (?\e$(5"4\e(B 0)
782 (?\e$(5"5\e(B 0)
783 (?\e$(5"6\e(B 0)
784 (?\e$(5"7\e(B 0)
785 (?\e$(5"8\e(B 0)
786 (?\e$(5"9\e(B 0)
787 (?\e$(5":\e(B 0)
788 (?\e$(5";\e(B 0)
789 (?\e$(5"<\e(B 0)
790 (?\e$(5"=\e(B 0)
791 (?\e$(5">\e(B 0)
792 (?\e$(5"?\e(B 0)
793 (?\e$(5"@\e(B 0)
794 (?\e$(5"A\e(B 0)
795 (?\e$(5"B\e(B 0)
796 (?\e$(5"C\e(B 0)
797 (?\e$(5"D\e(B 0)
798 (?\e$(5"E\e(B 0)
799 (?\e$(5"F\e(B 0)
800 (?\e$(5"G\e(B 0)
801 (?\e$(5"H\e(B 0)
802 (?\e$(5"I\e(B 0)
803 (?\e$(5"J\e(B 0)
804 (?\e$(5"K\e(B 0)
805 (?\e$(5"L\e(B 0)
806 (?\e$(5"M\e(B 0)
807 (?\e$(5"N\e(B 0)
808 (?\e$(5"O\e(B 0)
809 (?\e$(5"P\e(B 0)
810 (?\e$(5"Q\e(B 0)
811 (?\e$(5"R\e(B 0)
812 (?\e$(5"S\e(B 0)
813 (?\e$(5"T\e(B 0)
814 (?\e$(5"U\e(B 0)
815 (?\e$(5"V\e(B 0)
816 (?\e$(5"W\e(B 0)
817 (?\e$(5"X\e(B 0)
818 (?\e$(5"Y\e(B 0)
819 (?\e$(5"Z\e(B 0)
820 (?\e$(5"[\e(B 0)
821 (?\e$(5"\\e(B 0)
822 (?\e$(5"]\e(B 0)
823 (?\e$(5"^\e(B 0)
824 (?\e$(5"_\e(B 0)
825 (?\e$(5"`\e(B 0)
826 (?\e$(5"a\e(B 0)
827 (?\e$(5"b\e(B 0)
828 (?\e$(5"c\e(B 0)
829 (?\e$(5"d\e(B 0)
830 (?\e$(5"e\e(B 0)
831 (?\e$(5"f\e(B 0)
832 (?\e$(5"g\e(B 0)
833 (?\e$(5"h\e(B 0)
834 (?\e$(5"i\e(B 0)
835 (?\e$(5"j\e(B 0)
836 (?\e$(5"k\e(B 0)
837 (?\e$(5"l\e(B 0)
838 (?\e$(5"m\e(B 0)
839 (?\e$(5"n\e(B 0)
840 (?\e$(5"o\e(B 0)
37cdc7ad
KH		 841 (?\e$(5"p\e(B 10 (mr . mr))
842 (?\e$(5"q\e(B 0 (br . br))
843 (?\e$(5"r\e(B 0 (br . tr))
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KH		 844 (?\e$(5"s\e(B 0)
845 (?\e$(5"t\e(B 0)
846 (?\e$(5"u\e(B 0)
847 (?\e$(5"v\e(B 0)
848 (?\e$(5"w\e(B 0)
849 (?\e$(5"x\e(B 0)
850 (?\e$(5"y\e(B 0)
851 (?\e$(5"z\e(B 0)
852 (?\e$(5"{\e(B 0)
853 (?\e$(5"|\e(B 0)
854 (?\e$(5"}\e(B 0)
855 (?\e$(5"~\e(B 0)
856 (?\e$(5#!\e(B 0)
857 (?\e$(5#"\e(B 0)
858 (?\e$(5##\e(B 0)
859 (?\e$(5#$\e(B 0)
860 (?\e$(5#%\e(B 0)
861 (?\e$(5#&\e(B 0)
862 (?\e$(5#'\e(B 0)
863 (?\e$(5#(\e(B 0)
864 (?\e$(5#)\e(B 0)
865 (?\e$(5#*\e(B 0)
866 (?\e$(5#+\e(B 0)
867 (?\e$(5#,\e(B 0)
868 (?\e$(5#-\e(B 0)
869 (?\e$(5#.\e(B 0)
870 (?\e$(5#/\e(B 0)
871 (?\e$(5#0\e(B 0)
872 (?\e$(5#1\e(B 0)
873 (?\e$(5#2\e(B 0)
874 (?\e$(5#3\e(B 0)
875 (?\e$(5#4\e(B 0)
876 (?\e$(5#5\e(B 0)
877 (?\e$(5#6\e(B 0)
878 (?\e$(5#7\e(B 0)
879 (?\e$(5#8\e(B 0)
880 (?\e$(5#9\e(B 0)
881 (?\e$(5#:\e(B 0)
882 (?\e$(5#;\e(B 0)
883 (?\e$(5#<\e(B 0)
884 (?\e$(5#=\e(B 0)
885 (?\e$(5#>\e(B 0)
886 (?\e$(5#?\e(B 0)
887 (?\e$(5#@\e(B 0)
888 (?\e$(5#A\e(B 0)
889 (?\e$(5#B\e(B 0)
890 (?\e$(5#C\e(B 0)
891 (?\e$(5#D\e(B 0)
892 (?\e$(5#E\e(B 0)
893 (?\e$(5#F\e(B 0)
894 (?\e$(5#G\e(B 0)
895 (?\e$(5#H\e(B 0)
896 (?\e$(5#I\e(B 0)
897 (?\e$(5#J\e(B 0)
37cdc7ad
KH		 898 (?\e$(5#K\e(B 0 (br . tr))
899 (?\e$(5#L\e(B 0 (br . tr))
900 (?\e$(5#M\e(B 0 (br . tr))
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KH		 901 (?\e$(5#N\e(B 0)
902 (?\e$(5#O\e(B 0)
903 (?\e$(5#P\e(B 0)
904 (?\e$(5#Q\e(B 0)
905 (?\e$(5#R\e(B 0)
906 (?\e$(5#S\e(B 0)
907 (?\e$(5#T\e(B 0)
908 (?\e$(5#U\e(B 0)
909 (?\e$(5#V\e(B 0)
910 (?\e$(5#W\e(B 0)
911 (?\e$(5#X\e(B 0)
912 (?\e$(5#Y\e(B 0)
913 (?\e$(5#Z\e(B 0)
914 (?\e$(5#[\e(B 0)
915 (?\e$(5#\\e(B 0)
916 (?\e$(5#]\e(B 0)
917 (?\e$(5#^\e(B 0)
918 (?\e$(5#_\e(B 0)
919 (?\e$(5#`\e(B 0)
920 (?\e$(5#a\e(B 0)
921 (?\e$(5#b\e(B 0)
922 (?\e$(5#c\e(B 0)
923 (?\e$(5#d\e(B 0)
924 (?\e$(5#e\e(B 0)
925 (?\e$(5#f\e(B 0)
926 (?\e$(5#g\e(B 0)
927 (?\e$(5#h\e(B 0)
928 (?\e$(5#i\e(B 0)
929 (?\e$(5#j\e(B 0)
930 (?\e$(5#k\e(B 0)
931 (?\e$(5#l\e(B 0)
932 (?\e$(5#m\e(B 0)
933 (?\e$(5#n\e(B 0)
934 (?\e$(5#o\e(B 0)
935 (?\e$(5#p\e(B 0)
936 (?\e$(5#q\e(B 0)
937 (?\e$(5#r\e(B 0)
938 (?\e$(5#s\e(B 0)
939 (?\e$(5#t\e(B 0)
940 (?\e$(5#u\e(B 0)
941 (?\e$(5#v\e(B 0)
942 (?\e$(5#w\e(B 0)
943 (?\e$(5#x\e(B 0)
944 (?\e$(5#y\e(B 0)
945 (?\e$(5#z\e(B 0)
946 (?\e$(5#{\e(B 0)
947 (?\e$(5#|\e(B 0)
948 (?\e$(5#}\e(B 0)
949 (?\e$(5#~\e(B 0)
950 (?\e$(5$!\e(B 0)
951 (?\e$(5$"\e(B 0)
952 (?\e$(5$#\e(B 0)
953 (?\e$(5$$\e(B 0)
954 (?\e$(5$%\e(B 0)
955 (?\e$(5$&\e(B 0)
956 (?\e$(5$'\e(B 0)
957 (?\e$(5$(\e(B 0)
958 (?\e$(5$)\e(B 0)
959 (?\e$(5$*\e(B 0)
960 (?\e$(5$+\e(B 0)
961 (?\e$(5$,\e(B 0)
962 (?\e$(5$-\e(B 0)
963 (?\e$(5$.\e(B 0)
964 (?\e$(5$/\e(B 0)
965 (?\e$(5$0\e(B 0)
966 (?\e$(5$1\e(B 0)
967 (?\e$(5$2\e(B 0)
968 (?\e$(5$3\e(B 0)
969 (?\e$(5$4\e(B 0)
970 (?\e$(5$5\e(B 0)
971 (?\e$(5$6\e(B 0)
972 (?\e$(5$7\e(B 0)
973 (?\e$(5$8\e(B 0)
974 (?\e$(5$9\e(B 0)
975 (?\e$(5$:\e(B 0)
976 (?\e$(5$;\e(B 0)
977 (?\e$(5$<\e(B 0)
978 (?\e$(5$=\e(B 0)
979 (?\e$(5$>\e(B 0)
980 (?\e$(5$?\e(B 0)
981 (?\e$(5$@\e(B 0)
982 (?\e$(5$A\e(B 0)
983 (?\e$(5$B\e(B 0)
984 (?\e$(5$C\e(B 0)
985 (?\e$(5$D\e(B 0)
986 (?\e$(5$E\e(B 0)
987 (?\e$(5$F\e(B 0)
988 (?\e$(5$G\e(B 0)
989 (?\e$(5$H\e(B 0)
990 (?\e$(5$I\e(B 0)
991 (?\e$(5$J\e(B 0)
992 (?\e$(5$K\e(B 0)
993 (?\e$(5$L\e(B 0)
994 (?\e$(5$M\e(B 0)
995 (?\e$(5$N\e(B 0)
996 (?\e$(5$O\e(B 0)
997 (?\e$(5$P\e(B 0)
998 (?\e$(5$Q\e(B 0)
999 (?\e$(5$R\e(B 0)
1000 (?\e$(5$S\e(B 0)
1001 (?\e$(5$T\e(B 0)
1002 (?\e$(5$U\e(B 0)
1003 (?\e$(5$V\e(B 0)
1004 (?\e$(5$W\e(B 0)
1005 (?\e$(5$X\e(B 0)
1006 (?\e$(5$Y\e(B 0)
1007 (?\e$(5$Z\e(B 0)
1008 (?\e$(5$[\e(B 0)
1009 (?\e$(5$\\e(B 0)
1010 (?\e$(5$]\e(B 0)
1011 (?\e$(5$^\e(B 0)
1012 (?\e$(5$_\e(B 0)
1013 (?\e$(5$`\e(B 0)
1014 (?\e$(5$a\e(B 0)
1015 (?\e$(5$b\e(B 0)
1016 (?\e$(5$c\e(B 0)
1017 (?\e$(5$d\e(B 0)
1018 (?\e$(5$e\e(B 0)
1019 (?\e$(5$f\e(B 0)
1020 (?\e$(5$g\e(B 0)
1021 (?\e$(5$h\e(B 0)
1022 (?\e$(5$i\e(B 0)
1023 (?\e$(5$j\e(B 0)
1024 (?\e$(5$k\e(B 0)
1025 (?\e$(5$l\e(B 0)
1026 (?\e$(5$m\e(B 0)
1027 (?\e$(5$n\e(B 0)
1028 (?\e$(5$o\e(B 0)
1029 (?\e$(5$p\e(B 0)
1030 (?\e$(5$q\e(B 0)
1031 (?\e$(5$r\e(B 0)
1032 (?\e$(5$s\e(B 0)
1033 (?\e$(5$t\e(B 0)
1034 (?\e$(5$u\e(B 0)
1035 (?\e$(5$v\e(B 0)
1036 (?\e$(5$w\e(B 0)
1037 (?\e$(5$x\e(B 0)
1038 (?\e$(5$y\e(B 0)
1039 (?\e$(5$z\e(B 0)
1040 (?\e$(5${\e(B 0)
1041 (?\e$(5$|\e(B 0)
1042 (?\e$(5$}\e(B 0)
1043 (?\e$(5$~\e(B 0)
1044 ))
1045
1046;; Determine composition priority and rule of the array of Glyphs.
1047;; Sort the glyphs with their priority.
1048
31ce7719
KH		 1049(defun devanagari-reorder-glyphs-for-composition (string start end)
1050 (let ((pos start)
1051 (ordered-glyphs nil))
1052 (while (< pos end)
1053 (let ((glyph (aref string pos)))
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KH		 1054 (setq pos (1+ pos))
1055 (setq ordered-glyphs
31ce7719
KH		 1056 (append ordered-glyphs
1057 (list (assq glyph devanagari-composition-rules))))))
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KH		 1058 (sort ordered-glyphs '(lambda (x y) (< (car (cdr x)) (car (cdr y)))))))
1059
31ce7719 1060! ;;(devanagari-compose-to-one-glyph "\e$(5"5!X![\e(B") => "\e4\e$(6!Xv#"5t%![\e0!X"5![\e1\e(B"
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KH		 1061
1062(defun devanagari-compose-to-one-glyph (devanagari-string)
37cdc7ad 1063 (let* ((o-glyph-list (devanagari-reorder-glyphs-for-composition
31ce7719 1064 devanagari-string 0 (length devanagari-string)))
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KH		 1065 ;; List of glyphs to be composed.
1066 (cmp-glyph-list (list (car (car o-glyph-list))))
1067 (o-glyph-list (cdr o-glyph-list)))
1068 (while o-glyph-list
1069 (let* ((o-glyph (car o-glyph-list))
1070 (glyph (if (< 2 (length o-glyph))
1071 ;; default composition
1072 (list (car (cdr (cdr o-glyph))) (car o-glyph))
1073 ;; composition with a specified rule
1074 (list '(mr . ml) (car o-glyph)))))
1075 (setq o-glyph-list (cdr o-glyph-list))
1076 (setq cmp-glyph-list (append cmp-glyph-list glyph))))
1077 ;; Before applying compose-chars, convert glyphs to
1078 ;; 1-column width if possible.
1079 (setq cmp-glyph-list (devanagari-wide-to-narrow cmp-glyph-list))
1080 (if (= (length cmp-glyph-list) 1) (char-to-string (car cmp-glyph-list))
1081 (apply 'compose-chars cmp-glyph-list))))
1082
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KH		 1083(defun devanagari-composition-component (string &optional start end)
1084 (or start (setq start 0))
1085 (or end (setq end (length string)))
1086 (let* ((o-glyph-list (devanagari-reorder-glyphs-for-composition
1087 string start end))
1088 ;; List of glyphs to be composed.
1089 (cmp-glyph-list (list (car (car o-glyph-list)))))
1090 (setq o-glyph-list (cdr o-glyph-list))
1091 (while o-glyph-list
1092 (let* ((o-glyph (car o-glyph-list))
1093 (glyph (if (< 2 (length o-glyph))
1094 ;; default composition
1095 (list (car (cdr (cdr o-glyph))) (car o-glyph))
1096 ;; composition with a specified rule
1097 (list '(mr . ml) (car o-glyph)))))
1098 (setq o-glyph-list (cdr o-glyph-list))
1099 (setq cmp-glyph-list (append cmp-glyph-list glyph))))
1100 ;; Convert glyphs to 1-column width if possible.
1101 (devanagari-wide-to-narrow cmp-glyph-list)))
1102
bd09f27b 1103;; Utility function for Phase 2.5
31ce7719
KH		 1104
1105;; Check whether GLYPH is a Devanagari vertical modifier or not.
bd09f27b
KH		 1106;; If it is a vertical modifier, whether it should be 1-column shape or not
1107;; depends on previous non-vertical modifier.
bd09f27b
KH		 1108(defun devanagari-vertical-modifier-p (glyph)
1109 (string-match (char-to-string glyph)
907c83c8 1110 "[\e$(5!"!]!^!_!`!a!b!c!h!i"p"q"r#K#L#M\e(B]"))
bd09f27b
KH		 1111
1112(defun devanagari-non-vertical-modifier-p (glyph)
1113 (string-match (char-to-string glyph)
907c83c8
KH		 1114; "[\e$(5!Z![!\!d!e!f!g\e(B]"))
1115 "[\e$(5![\e(B]"))
bd09f27b 1116
907c83c8 1117(defun devanagari-wide-to-narrow-char (char)
31ce7719
KH		 1118 "Convert Devanagari character CHAR to the corresponding narrow character.
1119If there's no corresponding narrow character, return CHAR as is."
907c83c8 1120 (let ((narrow (cdr (assq char devanagari-1-column-char))))
31ce7719 1121 (or narrow char)))
4ed46869
KH		 1122
1123;;
31ce7719 1124;; Phase 2.5 Convert appropriate character to 1-column shape.
4ed46869
KH		 1125;;
1126;; This is temporary and should be removed out when Emacs supports
1127;; variable width characters.
1128;;
1129;; This will convert the composing glyphs (2 column glyphs)
1130;; to narrow (1 column) glyphs if they exist.
1131;;
1132;; devanagari-wide-to-narrow-old converts glyphs simply.
1133;; devanagari-wide-to-narrow takes care of upper/lower apply-glyphs
1134;; with 2 column base-glyph.
1135;;
1136;; Execution Examples
bd09f27b
KH		 1137;;(devanagari-wide-to-narrow '(?\e$(5!3\e(B (ml . ml) ?\e$(5!a\e(B))
1138;;(devanagari-wide-to-narrow '(?\e$(5!F\e(B (ml . ml) ?\e$(5!a\e(B))
1139
4ed46869 1140(defun devanagari-wide-to-narrow (src-list)
bd09f27b
KH		 1141 (devanagari-wide-to-narrow-iter src-list t))
1142
907c83c8 1143(defun devanagari-wide-to-narrow-iter (src-list 2-col-glyph)
bd09f27b
KH		 1144 (let ((glyph (car src-list)))
1145 (cond ((null src-list) '())
1146 ; not glyph code
1147 ((not (numberp glyph))
31ce7719
KH		 1148 (cons glyph
1149 (devanagari-wide-to-narrow-iter (cdr src-list) 2-col-glyph)))
907c83c8 1150 ; glyphs to be processed regardless of the value of "2-col-glyph"
bd09f27b 1151 ((devanagari-non-vertical-modifier-p glyph)
907c83c8
KH		 1152 (cons (devanagari-wide-to-narrow-char glyph)
1153 (devanagari-wide-to-narrow-iter (cdr src-list) 2-col-glyph)))
1154 ; glyphs which are depends on the value of "2-col-glyph"
1155 ((devanagari-vertical-modifier-p glyph)
1156 (if 2-col-glyph
bd09f27b 1157 (cons glyph
907c83c8
KH		 1158 (devanagari-wide-to-narrow-iter (cdr src-list) t))
1159 (cons (devanagari-wide-to-narrow-char glyph)
31ce7719
KH		 1160 (devanagari-wide-to-narrow-iter (cdr src-list)
1161 2-col-glyph))))
bd09f27b
KH		 1162 ; normal glyph
1163 (t
1164 (if (cdr (assq glyph devanagari-1-column-char))
907c83c8 1165 (cons (devanagari-wide-to-narrow-char glyph)
bd09f27b
KH		 1166 (devanagari-wide-to-narrow-iter (cdr src-list) nil))
1167 (cons glyph
1168 (devanagari-wide-to-narrow-iter (cdr src-list) t)))))))
1169
4ed46869
KH		 1170
1171;;
1172;; Summary
1173;;
1174
4ed46869 1175;;
31ce7719 1176;; Decomposition of composite sequence.
4ed46869
KH		 1177;;
1178
4ed46869
KH		 1179;;;###autoload
1180(defun devanagari-decompose-string (str)
31ce7719
KH		 1181 "Decompose Devanagari string STR"
1182 (decompose-string (copy-sequence str)))
4ed46869
KH		 1183
1184;;;###autoload
1185(defun devanagari-decompose-region (from to)
1186 (interactive "r")
31ce7719 1187 (decompose-region from to))
4ed46869 1188
37cdc7ad
KH		 1189;;;
1190;;; Composition
1191;;;
1192
1193;;;###autoload
1194(defun devanagari-compose-string (str &rest langs)
31ce7719
KH		 1195 (setq str (copy-sequence str))
1196 (let ((idx 0)
1197 rest match-b match-e)
1198 (while (string-match devanagari-composite-glyph-unit str idx)
1199 (let* ((match-b (match-beginning 0))
1200 (match-e (match-end 0))
1201 (cmps (devanagari-composition-component
1202 (apply
1203 'char-to-glyph-devanagari
1204 (cons (substring str match-b match-e) langs)))))
1205 (compose-string str match-b match-e cmps)
1206 (setq idx match-e))))
1207 str)
4ed46869 1208
37cdc7ad
KH		 1209;;;###autoload
1210(defun devanagari-compose-region (from to &rest langs)
1211 (interactive "r")
31ce7719
KH		 1212 (save-excursion
1213 (save-restriction
1214 (narrow-to-region from to)
1215 (goto-char (point-min))
1216 (while (re-search-forward devanagari-composite-glyph-unit nil t)
1217 (let* ((match-b (match-beginning 0)) (match-e (match-end 0))
1218 (cmps (devanagari-composition-component
1219 (apply
1220 'char-to-glyph-devanagari
1221 (cons (buffer-substring match-b match-e) langs)))))
1222 (compose-region match-b match-e cmps))))))
4ed46869
KH		 1223
1224;; For pre-write and post-read conversion
1225
1226;;;###autoload
1227(defun devanagari-compose-from-is13194-region (from to)
1228 "Compose IS 13194 characters in the region to Devanagari characters."
1229 (interactive "r")
b9c4dcd8
KH		 1230 (save-excursion
1231 (save-restriction
1232 (narrow-to-region from to)
1233 (indian-to-devanagari-region (point-min) (point-max))
1234 (devanagari-compose-region (point-min) (point-max))
1235 (- (point-max) (point-min)))))
4ed46869 1236
cefa701a
KH		 1237;;;###autoload
1238(defun in-is13194-devanagari-post-read-conversion (len)
31ce7719
KH		 1239 (let ((pos (point)))
1240 (devanagari-compose-from-is13194-region pos (+ pos len))))
cefa701a 1241
4ed46869
KH		 1242;;;###autoload
1243(defun devanagari-decompose-to-is13194-region (from to)
1244 "Decompose Devanagari characters in the region to IS 13194 characters."
1245 (interactive "r")
31ce7719
KH		 1246 (save-excursion
1247 (save-restriction
1248 (narrow-to-region from to)
1249 (devanagari-decompose-region (point-min) (point-max))
1250 (devanagari-to-indian-region (point-min) (point-max)))))
4ed46869 1251
cefa701a
KH		 1252;;;###autoload
1253(defun in-is13194-devanagari-pre-write-conversion (from to)
cb877882 1254 (let ((old-buf (current-buffer)))
4cec2d0a
KH		 1255 (set-buffer (generate-new-buffer " *temp*"))
1256 (if (stringp from)
1257 (insert from)
1258 (insert-buffer-substring old-buf from to))
1259 (devanagari-decompose-to-is13194-region (point-min) (point-max))
cefa701a
KH		 1260 ;; Should return nil as annotations.
1261 nil))
37cdc7ad
KH		 1262
1263;; For input/output of ITRANS
1264
1265;;;###autoload
1266(defun devanagari-encode-itrans-region (from to)
1267 (interactive "r")
1268 (save-restriction
1269 (narrow-to-region from to)
1270 (devanagari-decompose-to-is13194-region (point-min) (point-max))
1271 (indian-encode-itrans-region (point-min) (point-max))))
1272
1273;;;###autoload
1274(defun devanagari-decode-itrans-region (from to)
1275 (interactive "r")
1276 (save-restriction
1277 (narrow-to-region from to)
1278 (indian-decode-itrans-region (point-min) (point-max))
1279 (devanagari-compose-from-is13194-region (point-min) (point-max))))
1280
4ed46869 1281;;
650e8505 1282(provide 'devan-util)
4ed46869 1283
a604c5af
KH		 1284;; Local Variables:
1285;; coding: iso-2022-7bit
1286;; End:
e8af40ee
PJ		 1287
1288;;; devan-util.el ends here
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