1 ;;; mlm-util.el --- support for composing malayalam characters -*-coding: iso-2022-7bit;-*-
3 ;; Copyright (C) 2003 Free Software Foundation, Inc.
5 ;; Maintainer: KAWABATA, Taichi <kawabata@m17n.org>
6 ;; Keywords: multilingual, Malayalam
8 ;; This file is part of GNU Emacs.
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)
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.
20 ;; You should have received a copy of the GNU General Public License
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.
25 ;; Created: Feb. 11. 2003
29 ;; This file provides character(Unicode) to glyph(CDAC) conversion and
30 ;; composition of Malayalam script characters.
34 ;; Malayalam Composable Pattern
42 ;; (N .. Zerowidth Non Joiner)
43 ;; (J .. Zerowidth Joiner. )
46 ;; 2. syllable : maximum of 5 consecutive consonants. (e.g. kartsnya)
47 ;; ((CH)?(CH)?(CH)?CH)?C(H|M?(A|D)?)?
49 (defconst malayalam-consonant
50 "[\e$,1@5\e(B-\e$,1@Y\e(B]")
52 (defconst malayalam-composable-pattern
54 "\\([\e$,1@%\e(B-\e$,1@4\e(B][\e$,1@"\e(B]?
\\)\\|
\e$
,1@#\e(B"
56 "\\(?
:\\(?
:[\e$
,1@5\e(B-\e$
,1@Y
\e(B]\e$
,1@m
\e(B\\)?
\\(?
:[\e$
,1@5\e(B-\e$
,1@Y
\e(B]\e$
,1@m
\e(B\\)?
\\(?
:[\e$
,1@5\e(B-\e$
,1@Y
\e(B]\e$
,1@m
\e(B\\)?
[\e$
,1@5\e(B-\e$
,1@Y
\e(B]\e$
,1@m
\e(B\\)?
"
57 "[\e$
,1@5\e(B-\e$
,1@Y
\e(B]\\(?
:\e$
,1@m
\e(B\\|
[\e$
,1@^
\e(B-\e$
,1@c
@f
@g
@h
@j
@j
@k
@l
\e(B]?
[\e$
,1@"@m\e(B]?\\)?"
59 "Regexp matching a composable sequence of Malayalam characters.")
62 (defun malayalam-compose-region (from to
)
66 (narrow-to-region from to
)
67 (goto-char (point-min))
68 (while (re-search-forward malayalam-composable-pattern nil t
)
69 (malayalam-compose-syllable-region (match-beginning 0)
71 (defun malayalam-compose-string (string)
73 (insert (decompose-string string
))
74 (malayalam-compose-region (point-min) (point-max))
77 (defun malayalam-post-read-conversion (len)
80 (let ((buffer-modified-p (buffer-modified-p)))
81 (narrow-to-region (point) (+ (point) len
))
82 (malayalam-compose-region (point-min) (point-max))
83 (set-buffer-modified-p buffer-modified-p
)
84 (- (point-max) (point-min))))))
86 (defun malayalam-range (from to
)
87 "Make the list of the integers of range FROM to TO."
89 (while (<= from to
) (setq result
(cons to result
) to
(1- to
))) result
))
91 (defun malayalam-regexp-of-hashtbl-keys (hashtbl)
92 "Return a regular expression that matches all keys in hashtable HASHTBL."
93 (let ((max-specpdl-size 1000))
97 (maphash (function (lambda (key val
) (setq dummy
(cons key dummy
)))) hashtbl
)
99 (function (lambda (x y
) (> (length x
) (length y
))))))))
103 (defun malayalam-composition-function (pos &optional string
)
104 "Compose Malayalam characters after the position POS.
105 If STRING is not nil, it is a string, and POS is an index to the string.
106 In this case, compose characters after POS of the string."
108 ;; Not yet implemented.
111 (if (looking-at malayalam-composable-pattern
)
113 (malayalam-compose-syllable-region pos
(match-end 0))))))
115 ;; Notes on conversion steps.
117 ;; 1. chars to glyphs
119 ;; Simple replacement of characters to glyphs is done.
121 ;; 2. glyphs reordering.
123 ;; Two special reordering rule takes place.
124 ;; a. following "\e$,46[\e(B" goes to the front.
125 ;; b. following "\e$,46S6S\e(B", "\e$,46S\e(B" or "\e$,46T\e(B" goes to the front.
126 ;; This reordering occurs only to the last cluster of consonants.
127 ;; Preceding consonants with halant characters are not affected.
131 ;; left modifiers will be attached at the left.
132 ;; others will be attached right.
134 (defvar mlm-char-glyph
136 ("\e$,1@"\e(B" . "\e$
,46W
\e(B")
137 ("\e$
,1@#\e(B" . "\e$
,46X
\e(B")
138 ;; Independent Vowels
139 ("\e$
,1@%
\e(B" . "\e$
,46!\e(B")
140 ("\e$
,1@&\e(B" . "\e$
,46"\e(B")
141 ("\e$,1@'\e(B" .
"\e$,46#\e(B")
142 ("\e$,1@(\e(B" .
"\e$,46#6U\e(B")
143 ("\e$,1@)\e(B" .
"\e$,46$\e(B")
144 ("\e$,1@*\e(B" .
"\e$,46$6U\e(B")
145 ("\e$,1@+\e(B" .
"\e$,46%\e(B")
146 ("\e$,1@,\e(B" .
"nil") ;; not in present use, not supported.
147 ("\e$,1@.\e(B" .
"\e$,46&\e(B")
148 ("\e$,1@/\e(B" .
"\e$,46'\e(B")
149 ("\e$,1@0\e(B" .
"\e$,46S6&\e(B")
150 ("\e$,1@2\e(B" .
"\e$,46(\e(B")
151 ("\e$,1@3\e(B" .
"\e$,46(6M\e(B")
152 ("\e$,1@4\e(B" .
"\e$,46(6U\e(B")
154 ("\e$,1@5\e(B" .
"\e$,46)\e(B")
155 ("\e$,1@5@m@5\e(B" .
"\e$,47!\e(B")
156 ("\e$,1@5@m@S\e(B" .
"\e$,47"\e(B")
157 ("\e$
,1@5@m
@W
\e(B" . "\e$
,47#\e(B")
158 ("\e$
,1@5@m
@?
\e(B" . "\e$
,47N
\e(B")
159 ("\e$
,1@5@m
@D
\e(B" . "\e$
,47`\e(B")
160 ("\e$
,1@5@a
\e(B" . "\e$
,47f
\e(B")
161 ("\e$
,1@5@m
@5@a
\e(B" . "\e$
,47g
\e(B")
162 ("\e$
,1@5@a
\e(B" . "\e$
,47f
\e(B")
163 ("\e$
,1@5@m
@5@a
\e(B" . "\e$
,47g
\e(B")
165 ("\e$
,1@6\e(B" . "\e$
,46*\e(B")
167 ("\e$
,1@7\e(B" . "\e$
,46+\e(B")
168 ("\e$
,1@7@m
@7\e(B" . "\e$
,47$
\e(B")
169 ("\e$
,1@7@m
@R
\e(B" . "\e$
,47%
\e(B")
170 ("\e$
,1@7@m
@N
\e(B" . "\e$
,47\
\e(B")
171 ("\e$
,1@7@m
@H
\e(B" . "\e$
,47a
\e(B")
173 ("\e$
,1@8\e(B" . "\e$
,46,\e(B")
175 ("\e$
,1@9\e(B" . "\e$
,46-
\e(B")
176 ("\e$
,1@9@m
@5\e(B" . "\e$
,47&\e(B")
177 ("\e$
,1@9@m
@9\e(B" . "\e$
,47'\e(B")
178 ("\e$
,1@9@m
@5@a
\e(B" . "\e$
,47h
\e(B")
180 ("\e$
,1@:\e(B" . "\e$
,46.
\e(B")
181 ("\e$
,1@:@m
@:\e(B" . "\e$
,47(\e(B") ;; duplicate
182 ("\e$
,1@:@m
@;\e(B" . "\e$,47Q\e(B")
184 ("\e$,1@;\e(B" .
"\e$,46/\e(B")
186 ("\e$,1@<\e(B" .
"\e$,460\e(B")
187 ("\e$,1@<@m@<\e(B" .
"\e$,47V\e(B")
188 ("\e$,1@<@m@>\e(B" .
"\e$,47Z\e(B")
190 ("\e$,1@=\e(B" .
"\e$,461\e(B")
192 ("\e$,1@>\e(B" .
"\e$,462\e(B")
193 ("\e$,1@>@m@:\e(B" .
"\e$,47)\e(B")
194 ("\e$,1@>@m@>\e(B" .
"\e$,47*\e(B")
196 ("\e$,1@?\e(B" .
"\e$,463\e(B")
197 ("\e$,1@?@m@?\e(B" .
"\e$,47+\e(B")
199 ("\e$,1@@\e(B" .
"\e$,464\e(B")
200 ("\e$,1@A\e(B" .
"\e$,465\e(B")
201 ("\e$,1@A@m@A\e(B" .
"\e$,47M\e(B")
202 ("\e$,1@B\e(B" .
"\e$,466\e(B")
204 ("\e$,1@C\e(B" .
"\e$,467\e(B")
205 ("\e$,1@C@a@m\e(B" .
"\e$,47,\e(B") ;; half consonant
206 ("\e$,1@C@m@?\e(B" .
"\e$,47-\e(B")
207 ("\e$,1@C@m@C\e(B" .
"\e$,47.\e(B")
208 ("\e$,1@C@m@N\e(B" .
"\e$,47W\e(B")
209 ("\e$,1@C@m@A\e(B" .
"\e$,47^\e(B")
210 ("\e$,1@C@a\e(B" .
"\e$,47i\e(B")
212 ("\e$,1@D\e(B" .
"\e$,468\e(B")
213 ("\e$,1@D@m@D\e(B" .
"\e$,47/\e(B")
214 ("\e$,1@D@m@E\e(B" .
"\e$,470\e(B")
215 ("\e$,1@D@m@X\e(B" .
"\e$,47U\e(B")
216 ("\e$,1@D@m@M\e(B" .
"\e$,47[\e(B")
217 ("\e$,1@D@m@N\e(B" .
"\e$,47_\e(B")
219 ("\e$,1@E\e(B" .
"\e$,469\e(B")
221 ("\e$,1@F\e(B" .
"\e$,46:\e(B")
222 ("\e$,1@F@m@F\e(B" .
"\e$,471\e(B")
223 ("\e$,1@F@m@G\e(B" .
"\e$,472\e(B")
225 ("\e$,1@G\e(B" .
"\e$,46;\e(B")
227 ("\e$,1@H\e(B" .
"\e$,46<\e(B")
228 ("\e$,1@H@a@m\e(B" .
"\e$,473\e(B") ;; half consonant
229 ("\e$,1@H@m@D\e(B" .
"\e$,474\e(B")
230 ("\e$,1@H@m@F\e(B" .
"\e$,475\e(B")
231 ("\e$,1@H@m@H\e(B" .
"\e$,476\e(B")
232 ("\e$,1@H@m@N\e(B" .
"\e$,477\e(B")
233 ("\e$,1@H@m@G\e(B" .
"\e$,47T\e(B")
234 ("\e$,1@H@m@E\e(B" .
"\e$,47Y\e(B")
235 ("\e$,1@H@m@Q\e(B" .
"\e$,47b\e(B")
236 ("\e$,1@H@a\e(B" .
"\e$,47k\e(B")
237 ("\e$,1@H@m@H@a\e(B" .
"\e$,47l\e(B")
239 ("\e$,1@J\e(B" .
"\e$,46=\e(B")
240 ("\e$,1@J@m@J\e(B" .
"\e$,478\e(B") ;; duplicate
241 ("\e$,1@J@m@R\e(B" .
"\e$,479\e(B") ;; lakar
243 ("\e$,1@K\e(B" .
"\e$,46>\e(B")
245 ("\e$,1@L\e(B" .
"\e$,46?\e(B")
246 ("\e$,1@L@m@L\e(B" .
"\e$,47:\e(B") ;; duplicate
247 ("\e$,1@L@m@R\e(B" .
"\e$,47;\e(B") ;; lakar
248 ("\e$,1@L@m@G\e(B" .
"\e$,47O\e(B")
249 ("\e$,1@L@m@F\e(B" .
"\e$,47P\e(B")
251 ("\e$,1@M\e(B" .
"\e$,46@\e(B")
253 ("\e$,1@N\e(B" .
"\e$,46A\e(B")
254 ("\e$,1@N@m@J\e(B" .
"\e$,47<\e(B")
255 ("\e$,1@N@m@N\e(B" .
"\e$,47=\e(B")
256 ("\e$,1@N@m@R\e(B" .
"\e$,47>\e(B") ;; lakar
258 ("\e$,1@O\e(B" .
"\e$,46B\e(B")
259 ("\e$,1@O@m@O\e(B" .
"\e$,47?\e(B") ;; duplicate
260 ("\e$,1@O@m@5@m@5\e(B" .
"\e$,47m\e(B")
262 ("\e$,1@P\e(B" .
"\e$,46C\e(B")
263 ("\e$,1@P@a@m\e(B" .
"\e$,47@\e(B")
264 ("\e$,1@P@a\e(B" .
"\e$,47j\e(B")
266 ("\e$,1@Q\e(B" .
"\e$,46D\e(B")
267 ("\e$,1@Q@m\e(B" .
"\e$,47@\e(B") ;; same glyph as "\e$,1@P@m\e(B"
268 ("\e$,1@Q@a@m\e(B" .
"\e$,47@\e(B") ;; same glyph as "\e$,1@P@m\e(B"
269 ;;("\e$,1@Q@m@Q\e(B" . "\e$,47A\e(B")
270 ("\e$,1@Q@m@Q\e(B" .
"\e$,47d\e(B")
272 ("\e$,1@R\e(B" .
"\e$,46E\e(B")
273 ("\e$,1@R@a@m\e(B" .
"\e$,47B\e(B")
274 ("\e$,1@R@m@R\e(B" .
"\e$,47C\e(B") ;; lakar
275 ("\e$,1@R@m@J\e(B" .
"\e$,47e\e(B")
277 ("\e$,1@S\e(B" .
"\e$,46F\e(B")
278 ("\e$,1@S@a@m\e(B" .
"\e$,47D\e(B")
279 ("\e$,1@S@m@S\e(B" .
"\e$,47E\e(B")
281 ("\e$,1@T\e(B" .
"\e$,46G\e(B")
283 ("\e$,1@U\e(B" .
"\e$,46H\e(B")
284 ("\e$,1@U@m@U\e(B" .
"\e$,47F\e(B")
286 ("\e$,1@V\e(B" .
"\e$,46I\e(B")
287 ("\e$,1@V@m@R\e(B" .
"\e$,47G\e(B")
288 ("\e$,1@V@m@V\e(B" .
"\e$,47H\e(B")
289 ("\e$,1@V@m@:\e(B" .
"\e$,47]\e(B")
291 ("\e$,1@W\e(B" .
"\e$,46J\e(B")
292 ("\e$,1@W@m@?\e(B" .
"\e$,47c\e(B")
294 ("\e$,1@X\e(B" .
"\e$,46K\e(B")
295 ("\e$,1@X@m@R\e(B" .
"\e$,47I\e(B")
296 ("\e$,1@X@m@X\e(B" .
"\e$,47J\e(B")
297 ("\e$,1@X@m@Q@m@Q\e(B" .
"\e$,47L\e(B")
298 ("\e$,1@X@m@E\e(B" .
"\e$,47X\e(B")
300 ("\e$,1@Y\e(B" .
"\e$,46L\e(B")
301 ("\e$,1@Y@m@R\e(B" .
"\e$,47K\e(B")
302 ("\e$,1@Y@m@N\e(B" .
"\e$,47R\e(B")
303 ("\e$,1@Y@m@H\e(B" .
"\e$,47S\e(B")
305 ;; Dependent vowel signs
306 ("\e$,1@^\e(B" .
"\e$,46M\e(B")
307 ("\e$,1@_\e(B" .
"\e$,46N\e(B")
308 ("\e$,1@`\e(B" .
"\e$,46O\e(B")
309 ("\e$,1@a\e(B" .
"\e$,46P\e(B")
310 ("\e$,1@b\e(B" .
"\e$,46Q\e(B")
311 ("\e$,1@c\e(B" .
"\e$,46R\e(B")
312 ("\e$,1@f\e(B" .
"\e$,46S\e(B")
313 ("\e$,1@g\e(B" .
"\e$,46T\e(B")
314 ("\e$,1@h\e(B" .
"\e$,46S6S\e(B")
315 ("\e$,1@j\e(B" .
"\e$,46S6M\e(B")
316 ("\e$,1@k\e(B" .
"\e$,46T6M\e(B")
317 ("\e$,1@l\e(B" .
"\e$,46U\e(B")
319 ("\e$,1@m\e(B" .
"\e$,46V\e(B")
320 ("\e$,1@m@O\e(B" .
"\e$,46Y\e(B") ;; yakar
321 ("\e$,1@m@O@a\e(B" .
"\e$,46\\e(B") ;; yakar + u
322 ("\e$,1@m@O@b\e(B" .
"\e$,46]\e(B") ;; yakar + uu
323 ("\e$,1@m@U\e(B" .
"\e$,46Z\e(B") ;; vakar modifier
324 ("\e$,1@m@P\e(B" .
"\e$,46[\e(B") ;; rakar modifier is the same to rra modifier.
325 ("\e$,1@m@P@m\e(B" .
"\e$,46R\e(B") ;; halant + rakar + halant
326 ("\e$,1@m@Q\e(B" .
"\e$,46[\e(B") ;; rrakar modifier
327 ("\e$,1@m@Q@m\e(B" .
"\e$,46R\e(B") ;; halant + rrakar + halant
328 ("\e$,1@m@m\e(B" .
"\e$,46V\e(B") ;; double omission sign to stop forming half consonant.
329 ("\e$,1@w\e(B" .
"\e$,46U\e(B") ;; not in present use, already at 0D4C.
332 (defvar mlm-char-glyph-hash
333 (let* ((hash (make-hash-table :test
'equal
)))
334 (mapc (function (lambda (x) (puthash (car x
) (cdr x
) hash
)))
338 (defvar mlm-char-glyph-regexp
339 (malayalam-regexp-of-hashtbl-keys mlm-char-glyph-hash
))
341 ;; Malayalam languages needed to be reordered in a complex mannar.
343 (defvar mlm-consonants
345 "\e$,46)6*6+6,6-6.6/606162636465666768696:6;6<6=6>6?6@6A6B6C6D6E6F6G6H6I6J6K6L\e(B"
346 "\e$,47!7"7#7$
7%
7&7'7(7)7*7+7,7-
7.7/707172737475767778797:7;7<7=7>7?7@7A7B7C7D7E7F7G7H7I7J7K7L7M7N7O7P7Q7R7S7T7U7V7W7X7Y7Z7[7\7]7^7_7`7a7b7c7d7e\e(B"
349 (defvar mlm-consonants-regexp
350 (concat "\\(\e$,46[\e(B?[" mlm-consonants
"][\e$,46Y6Z\e(B]?\\)"))
352 (defvar mlm-glyph-reorder-key-glyphs
"[\e$,46[6S6T\e(B]")
354 (defvar mlm-glyph-reordering-regexp-list
355 `((,(concat "\\([" mlm-consonants
"][\e$,46Y6Z\e(B]?\\)\e$,46[\e(B") .
"\e$,46[\e(B\\1")
356 (,(concat mlm-consonants-regexp
"\e$,46S6S\e(B") .
"\e$,46S6S\e(B\\1")
357 (,(concat mlm-consonants-regexp
"\e$,46S\e(B") .
"\e$,46S\e(B\\1")
358 (,(concat mlm-consonants-regexp
"\e$,46T\e(B") .
"\e$,46T\e(B\\1")))
360 (defun malayalam-compose-syllable-string (string)
362 (insert (decompose-string string
))
363 (malayalam-compose-syllable-region (point-min) (point-max))
366 (defun malayalam-compose-syllable-region (from to
)
367 "Compose malayalam syllable in region FROM to TO."
370 glyph-reorder-regexps
371 glyph-reorder-replace
372 glyph-reorder-regexp
)
375 (narrow-to-region from to
)
376 (goto-char (point-min))
377 ;; char-glyph-conversion
379 (if (looking-at mlm-char-glyph-regexp
)
381 (setq match-str
(match-string 0)
384 (gethash match-str mlm-char-glyph-hash
)))
385 (goto-char (match-end 0)))
386 (setq glyph-str
(concat glyph-str
(string (following-char))))
388 (when (string-match mlm-glyph-reorder-key-glyphs glyph-str
)
390 (setq glyph-reorder-regexps mlm-glyph-reordering-regexp-list
)
391 (while glyph-reorder-regexps
392 (setq glyph-reorder-regexp
(caar glyph-reorder-regexps
))
393 (setq glyph-reorder-replace
(cdar glyph-reorder-regexps
))
394 (setq glyph-reorder-regexps
(cdr glyph-reorder-regexps
))
395 (if (string-match glyph-reorder-regexp glyph-str
)
397 (replace-match glyph-reorder-replace nil nil
399 ;; concatenate and attach reference-points.
406 (lambda (x) (list '(5 .
3) x
))) ;; default ref. point.
408 (compose-region from to glyph-str
)))))
412 ;;; devan-util.el ends here