1 ;;; thai-util.el --- utilities for Thai -*- coding: iso-2022-7bit; -*-
3 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007, 2008
5 ;; National Institute of Advanced Industrial Science and Technology (AIST)
6 ;; Registration Number H14PRO021
7 ;; Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
8 ;; Free Software Foundation, Inc.
10 ;; Keywords: mule, multilingual, Thai, i18n
12 ;; This file is part of GNU Emacs.
14 ;; GNU Emacs is free software; you can redistribute it and/or modify
15 ;; it under the terms of the GNU General Public License as published by
16 ;; the Free Software Foundation; either version 3, or (at your option)
19 ;; GNU Emacs is distributed in the hope that it will be useful,
20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 ;; GNU General Public License for more details.
24 ;; You should have received a copy of the GNU General Public License
25 ;; along with GNU Emacs; see the file COPYING. If not, write to the
26 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
27 ;; Boston, MA 02110-1301, USA.
33 (defvar thai-auto-composition-mode
)
35 ;; Setting information of Thai characters.
37 (defconst thai-category-table
(make-category-table))
38 (define-category ?c
"Thai consonant" thai-category-table
)
39 (define-category ?v
"Thai upper/lower vowel" thai-category-table
)
40 (define-category ?t
"Thai tone mark" thai-category-table
)
41 (define-category ?u
"Thai tone mark and upper sign" thai-category-table
)
42 (define-category ?I
"THAI CHARACTER SARA I" thai-category-table
)
43 (define-category ?U
"THAI CHARACTER THANTHAKHAT" thai-category-table
)
45 ;; The general composing rules are as follows:
49 ;; CV -> C, CU -> C, CVT -> C, Cv -> C, CvU -> C
52 ;; where C: consonant, V: vowel upper, v: vowel lower,
53 ;; T: tone mark, U: tone mark and upper sign.
54 ;; Special rule: The sign `\e,Tl\e(B' can be put on the vowel `\e,TT\e(B'.
57 (defvar thai-composition-pattern
58 "\\cc\\(\\cu\\|\\cI\\cU\\|\\cv\\ct?\\)\\|\\cv\\ct\\|\\cI\\cU"
59 "Regular expression matching a Thai composite sequence.")
61 (let ((l '((?
\e,T
!\e(B consonant
"LETTER KO KAI") ; 0xA1
62 (?
\e,T
"\e(B consonant "LETTER KHO KHAI
") ; 0xA2
63 (?\e,T#\e(B consonant "LETTER KHO KHUAT
") ; 0xA3
64 (?\e,T$\e(B consonant "LETTER KHO KHWAI
") ; 0xA4
65 (?\e,T%\e(B consonant "LETTER KHO KHON
") ; 0xA5
66 (?\e,T&\e(B consonant "LETTER KHO RAKHANG
") ; 0xA6
67 (?\e,T'\e(B consonant "LETTER NGO NGU
") ; 0xA7
68 (?\e,T(\e(B consonant "LETTER CHO CHAN
") ; 0xA8
69 (?\e,T)\e(B consonant "LETTER CHO CHING
") ; 0xA9
70 (?\e,T*\e(B consonant "LETTER CHO CHANG
") ; 0xAA
71 (?\e,T+\e(B consonant "LETTER SO SO
") ; 0xAB
72 (?\e,T,\e(B consonant "LETTER CHO CHOE
") ; 0xAC
73 (?\e,T-\e(B consonant "LETTER YO YING
") ; 0xAD
74 (?\e,T.\e(B consonant "LETTER DO CHADA
") ; 0xAE
75 (?\e,T/\e(B consonant "LETTER TO PATAK
") ; 0xAF
76 (?\e,T0\e(B consonant "LETTER THO THAN
") ; 0xB0
77 (?\e,T1\e(B consonant "LETTER THO NANGMONTHO
") ; 0xB1
78 (?\e,T2\e(B consonant "LETTER THO PHUTHAO
") ; 0xB2
79 (?\e,T3\e(B consonant "LETTER NO NEN
") ; 0xB3
80 (?\e,T4\e(B consonant "LETTER DO DEK
") ; 0xB4
81 (?\e,T5\e(B consonant "LETTER TO TAO
") ; 0xB5
82 (?\e,T6\e(B consonant "LETTER THO THUNG
") ; 0xB6
83 (?\e,T7\e(B consonant "LETTER THO THAHAN
") ; 0xB7
84 (?\e,T8\e(B consonant "LETTER THO THONG
") ; 0xB8
85 (?\e,T9\e(B consonant "LETTER NO NU
") ; 0xB9
86 (?\e,T:\e(B consonant "LETTER BO BAIMAI
") ; 0xBA
87 (?\e,T;\e(B consonant "LETTER PO PLA
") ; 0xBB
88 (?\e,T<\e(B consonant "LETTER PHO PHUNG
") ; 0xBC
89 (?\e,T=\e(B consonant "LETTER FO FA
") ; 0xBD
90 (?\e,T>\e(B consonant "LETTER PHO PHAN
") ; 0xBE
91 (?\e,T?\e(B consonant "LETTER FO FAN
") ; 0xBF
92 (?\e,T@\e(B consonant "LETTER PHO SAMPHAO
") ; 0xC0
93 (?\e,TA\e(B consonant "LETTER MO MA
") ; 0xC1
94 (?\e,TB\e(B consonant "LETTER YO YAK
") ; 0xC2
95 (?\e,TC\e(B consonant "LETTER RO RUA
") ; 0xC3
96 (?\e,TD\e(B vowel-base "LETTER RU
(Pali vowel letter
)") ; 0xC4
97 (?\e,TE\e(B consonant "LETTER LO LING
") ; 0xC5
98 (?\e,TF\e(B vowel-base "LETTER LU
(Pali vowel letter
)") ; 0xC6
99 (?\e,TG\e(B consonant "LETTER WO WAEN
") ; 0xC7
100 (?\e,TH\e(B consonant "LETTER SO SALA
") ; 0xC8
101 (?\e,TI\e(B consonant "LETTER SO RUSI
") ; 0xC9
102 (?\e,TJ\e(B consonant "LETTER SO SUA
") ; 0xCA
103 (?\e,TK\e(B consonant "LETTER HO HIP
") ; 0xCB
104 (?\e,TL\e(B consonant "LETTER LO CHULA
") ; 0xCC
105 (?\e,TM\e(B consonant "LETTER O ANG
") ; 0xCD
106 (?\e,TN\e(B consonant "LETTER HO NOK HUK
") ; 0xCE
107 (?\e,TO\e(B special "PAI YAN NOI
(abbreviation)") ; 0xCF
108 (?\e,TP\e(B vowel-base "VOWEL SIGN SARA A
") ; 0xD0
109 (?\e,TQ\e(B vowel-upper "VOWEL SIGN MAI HAN-AKAT N
/S-T
") ; 0xD1
110 (?\e,TR\e(B vowel-base "VOWEL SIGN SARA AA
") ; 0xD2
111 (?\e,TS\e(B vowel-base "VOWEL SIGN SARA AM
") ; 0xD3
112 (?\e,TT\e(B vowel-upper "VOWEL SIGN SARA I N
/S-T
") ; 0xD4
113 (?\e,TU\e(B vowel-upper "VOWEL SIGN SARA II N
/S-T
") ; 0xD5
114 (?\e,TV\e(B vowel-upper "VOWEL SIGN SARA UE N
/S-T
") ; 0xD6
115 (?\e,TW\e(B vowel-upper "VOWEL SIGN SARA UEE N
/S-T
") ; 0xD7
116 (?\e,TX\e(B vowel-lower "VOWEL SIGN SARA U N
/S-B
") ; 0xD8
117 (?\e,TY\e(B vowel-lower "VOWEL SIGN SARA UU N
/S-B
") ; 0xD9
118 (?\e,TZ\e(B vowel-lower "VOWEL SIGN PHINTHU N
/S-B
(Pali virama
)") ; 0xDA
119 (?\e,T[\e(B invalid nil) ; 0xDA
120 (?\e,T\\e(B invalid nil) ; 0xDC
121 (?\e,T]\e(B invalid nil) ; 0xDC
122 (?\e,T^\e(B invalid nil) ; 0xDC
123 (?\e,T_\e(B special "BAHT SIGN
(currency symbol
)") ; 0xDF
124 (?\e,T`\e(B vowel-base "VOWEL SIGN SARA E
") ; 0xE0
125 (?\e,Ta\e(B vowel-base "VOWEL SIGN SARA AE
") ; 0xE1
126 (?\e,Tb\e(B vowel-base "VOWEL SIGN SARA O
") ; 0xE2
127 (?\e,Tc\e(B vowel-base "VOWEL SIGN SARA MAI MUAN
") ; 0xE3
128 (?\e,Td\e(B vowel-base "VOWEL SIGN SARA MAI MALAI
") ; 0xE4
129 (?\e,Te\e(B vowel-base "LAK KHANG YAO
") ; 0xE5
130 (?\e,Tf\e(B special "MAI YAMOK
(repetion)") ; 0xE6
131 (?\e,Tg\e(B sign-upper "VOWEL SIGN MAI TAI KHU N
/S-T
") ; 0xE7
132 (?\e,Th\e(B tone "TONE MAI EK N
/S-T
") ; 0xE8
133 (?\e,Ti\e(B tone "TONE MAI THO N
/S-T
") ; 0xE9
134 (?\e,Tj\e(B tone "TONE MAI TRI N
/S-T
") ; 0xEA
135 (?\e,Tk\e(B tone "TONE MAI CHATTAWA N
/S-T
") ; 0xEB
136 (?\e,Tl\e(B sign-upper "THANTHAKHAT N
/S-T
(cancellation mark
)") ; 0xEC
137 (?\e,Tm\e(B sign-upper "NIKKHAHIT N
/S-T
(final nasal
)") ; 0xED
138 (?\e,Tn\e(B sign-upper "YAMAKKAN N
/S-T
") ; 0xEE
139 (?\e,To\e(B special "FONRMAN
") ; 0xEF
140 (?\e,Tp\e(B special "DIGIT ZERO
") ; 0xF0
141 (?\e,Tq\e(B special "DIGIT ONE
") ; 0xF1
142 (?\e,Tr\e(B special "DIGIT TWO
") ; 0xF2
143 (?\e,Ts\e(B special "DIGIT THREE
") ; 0xF3
144 (?\e,Tt\e(B special "DIGIT FOUR
") ; 0xF4
145 (?\e,Tu\e(B special "DIGIT FIVE
") ; 0xF5
146 (?\e,Tv\e(B special "DIGIT SIX
") ; 0xF6
147 (?\e,Tw\e(B special "DIGIT SEVEN
") ; 0xF7
148 (?\e,Tx\e(B special "DIGIT EIGHT
") ; 0xF8
149 (?\e,Ty\e(B special "DIGIT NINE
") ; 0xF9
150 (?\e,Tz\e(B special "ANGKHANKHU
(ellipsis)") ; 0xFA
151 (?\e,T{\e(B special "KHOMUT
(beginning of religious texts
)") ; 0xFB
152 (?\e,T|\e(B invalid nil) ; 0xFC
153 (?\e,T}\e(B invalid nil) ; 0xFD
154 (?\e,T~\e(B invalid nil) ; 0xFE
158 (setq elm (car l) l (cdr l))
159 (let ((char (car elm))
161 (put-char-code-property char 'phonetic-type ptype)
162 (cond ((eq ptype 'consonant)
163 (modify-category-entry char ?c thai-category-table))
164 ((memq ptype '(vowel-upper vowel-lower))
165 (modify-category-entry char ?v thai-category-table)
166 (if (= char ?\e,TT\e(B)
167 ;; Give category `I' to "SARA I
".
168 (modify-category-entry char ?I thai-category-table)))
170 (modify-category-entry char ?t thai-category-table)
171 (modify-category-entry char ?u thai-category-table))
172 ((eq ptype 'sign-upper)
173 (modify-category-entry char ?u thai-category-table)
174 (if (= char ?\e,Tl\e(B)
175 ;; Give category `U' to "THANTHAKHAT
".
176 (modify-category-entry char ?U thai-category-table))))
177 (put-char-code-property char 'name (nth 2 elm)))))
179 (defun thai-compose-syllable (beg end &optional category-set string)
182 (char-category-set (if string (aref string beg) (char-after beg)))))
183 (if (aref category-set ?c)
184 ;; Starting with a consonant. We do relative composition.
186 (compose-string string beg end)
187 (compose-region beg end))
188 ;; Vowel tone sequence.
190 (compose-string string beg end (list (aref string beg) '(Bc . Bc)
191 (aref string (1+ beg))))
192 (compose-region beg end (list (char-after beg) '(Bc . Bc)
193 (char-after (1+ beg))))))
197 (defun thai-compose-region (beg end)
198 "Compose Thai characters in the region.
199 When called from a program
, expects two arguments
,
200 positions
(integers or markers
) specifying the region.
"
204 (narrow-to-region beg end)
205 (goto-char (point-min))
206 (with-category-table thai-category-table
207 (while (re-search-forward thai-composition-pattern nil t)
208 (setq beg (match-beginning 0) end (match-end 0))
209 (if (and (> pos beg) (< pos end))
211 (thai-compose-syllable beg end
212 (char-category-set (char-after beg))))))
216 (defun thai-compose-string (string)
217 "Compose Thai characters in STRING and return the resulting string.
"
218 (with-category-table thai-category-table
220 (while (setq idx (string-match thai-composition-pattern string idx))
221 (thai-compose-syllable idx (match-end 0) nil string)
222 (setq idx (match-end 0)))))
226 (defun thai-compose-buffer ()
227 "Compose Thai characters in the current buffer.
"
229 (thai-compose-region (point-min) (point-max)))
232 (defun thai-composition-function (pos to font-object string)
234 (with-category-table thai-category-table
237 (eq (string-match thai-composition-pattern string pos) pos))
239 (thai-compose-syllable pos (match-end 0) nil string)))
240 (if (>= pos (point-min))
243 (if (looking-at thai-composition-pattern)
245 (thai-compose-syllable pos (match-end 0)))))))))
247 ;; Thai-word-mode requires functions in the feature `thai-word'.
250 (defvar thai-word-mode-map
251 (let ((map (make-sparse-keymap)))
252 (define-key map [remap forward-word] 'thai-forward-word)
253 (define-key map [remap backward-word] 'thai-backward-word)
254 (define-key map [remap kill-word] 'thai-kill-word)
255 (define-key map [remap backward-kill-word] 'thai-backward-kill-word)
256 (define-key map [remap transpose-words] 'thai-transpose-words)
258 "Keymap for
`thai-word-mode
'.
")
260 (define-minor-mode thai-word-mode
261 "Minor mode to make word-oriented commands aware of Thai words.
262 The commands affected are
\\[forward-word
], \\[backward-word
], \\[kill-word
], \\[backward-kill-word
], \\[transpose-words
], and
\\[fill-paragraph
].
"
263 :global t :group 'mule
264 (cond (thai-word-mode
265 ;; This enables linebreak between Thai characters.
266 (modify-category-entry (make-char 'thai-tis620) ?|)
267 ;; This enables linebreak at a Thai word boundary.
268 (put-charset-property 'thai-tis620 'fill-find-break-point-function
269 'thai-fill-find-break-point))
271 (modify-category-entry (make-char 'thai-tis620) ?| nil t)
272 (put-charset-property 'thai-tis620 'fill-find-break-point-function
275 ;; Function to call on entering the Thai language environment.
276 (defun setup-thai-language-environment-internal ()
279 ;; Function to call on exiting the Thai language environment.
280 (defun exit-thai-language-environment-internal ()
286 ;; arch-tag: 59425d6a-8cf9-4e06-a6ab-8ab7dc7a7a97
287 ;;; thai-util.el ends here