771
+ − 1 ;;; viet-util.el --- utilities for Vietnamese -*- coding: iso-2022-7bit; -*-
+ − 2
+ − 3 ;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
+ − 4 ;; Licensed to the Free Software Foundation.
+ − 5
+ − 6 ;; Keywords: mule, multilingual, Vietnamese
+ − 7
+ − 8 ;; This file is part of XEmacs.
+ − 9
+ − 10 ;; XEmacs is free software; you can redistribute it and/or modify it
+ − 11 ;; 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 ;; XEmacs is distributed in the hope that it will be useful, but
+ − 16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
+ − 17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ − 18 ;; General Public License for more details.
+ − 19
+ − 20 ;; You should have received a copy of the GNU General Public License
+ − 21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
+ − 22 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ − 23 ;; 02111-1307, USA.
+ − 24
+ − 25 ;;; Synched up with: Emacs 21.0.103 (language/viet-util.el).
+ − 26
+ − 27 ;;; Commentary:
+ − 28
+ − 29 ;; Vietnamese uses ASCII characters and additional 134 unique
+ − 30 ;; characters (these are Latin alphabets with various diacritical and
+ − 31 ;; tone marks). As far as I know, Vietnamese now has 4 different ways
+ − 32 ;; for representing these characters: VISCII, VSCII, VIQR, and
+ − 33 ;; Unicode. VISCII and VSCII are simple 1-byte code which assigns 134
+ − 34 ;; unique characters in control-code area (0x00..0x1F) and right half
+ − 35 ;; area (0x80..0xFF). VIQR is a menmonic encoding specification
+ − 36 ;; representing diacritical marks by following ASCII characters.
+ − 37
+ − 38 ;;; Code:
+ − 39
+ − 40 ;;;###autoload
+ − 41 (defun viet-encode-viscii-char (char)
+ − 42 "Return VISCII character code of CHAR if appropriate."
+ − 43 (aref (char-table-extra-slot viet-viscii-nonascii-translation-table 0)
+ − 44 char))
+ − 45
+ − 46 ;; VIQR is a menmonic encoding specification for Vietnamese.
+ − 47 ;; It represents diacritical marks by ASCII characters as follows:
+ − 48 ;; ------------+----------+--------
+ − 49 ;; mark | mnemonic | example
+ − 50 ;; ------------+----------+---------
+ − 51 ;; breve | ( | a( -> ,1e(B
+ − 52 ;; circumflex | ^ | a^ -> ,1b(B
+ − 53 ;; horn | + | o+ -> ,1=(B
+ − 54 ;; ------------+----------+---------
+ − 55 ;; acute | ' | a' -> ,1a(B
+ − 56 ;; grave | ` | a` -> ,1`(B
+ − 57 ;; hook above | ? | a? -> ,1d(B
+ − 58 ;; tilde | ~ | a~ -> ,1c(B
+ − 59 ;; dot below | . | a. -> ,1U(B
+ − 60 ;; ------------+----------+---------
+ − 61 ;; d bar | dd | dd -> ,1p(B
+ − 62 ;; ------------+----------+---------
+ − 63
+ − 64 (defvar viet-viqr-alist
+ − 65 '(;; lowercase
+ − 66 (?,1!(B . "a('") ; 161
+ − 67 (?,1"(B . "a(`") ; 162
+ − 68 (?,1#(B . "a(.") ; 163
+ − 69 (?,1$(B . "a^'") ; 164
+ − 70 (?,1%(B . "a^`") ; 165
+ − 71 (?,1&(B . "a^?") ; 166
+ − 72 (?,1'(B . "a^.") ; 167
+ − 73 (?,1((B . "e~") ; 168
+ − 74 (?,1)(B . "e.") ; 169
+ − 75 (?,1*(B . "e^'") ; 170
+ − 76 (?,1+(B . "e^`") ; 171
+ − 77 (?,1,(B . "e^?") ; 172
+ − 78 (?,1-(B . "e^~") ; 173
+ − 79 (?,1.(B . "e^.") ; 174
+ − 80 (?,1/(B . "o^'") ; 175
+ − 81 (?,10(B . "o^`") ; 176
+ − 82 (?,11(B . "o^?") ; 177
+ − 83 (?,12(B . "o^~") ; 178
+ − 84 (?,15(B . "o^.") ; 181
+ − 85 (?,16(B . "o+`") ; 182
+ − 86 (?,17(B . "o+?") ; 183
+ − 87 (?,18(B . "i.") ; 184
+ − 88 (?,1=(B . "o+") ; 189
+ − 89 (?,1>(B . "o+'") ; 190
+ − 90 (?,1F(B . "a(?") ; 198
+ − 91 (?,1G(B . "a(~") ; 199
+ − 92 (?,1O(B . "y`") ; 207
+ − 93 (?,1Q(B . "u+'") ; 209
+ − 94 (?,1U(B . "a.") ; 213
+ − 95 (?,1V(B . "y?") ; 214
+ − 96 (?,1W(B . "u+`") ; 215
+ − 97 (?,1X(B . "u+?") ; 216
+ − 98 (?,1[(B . "y~") ; 219
+ − 99 (?,1\(B . "y.") ; 220
+ − 100 (?,1^(B . "o+~") ; 222
+ − 101 (?,1_(B . "u+") ; 223
+ − 102 (?,1`(B . "a`") ; 224
+ − 103 (?,1a(B . "a'") ; 225
+ − 104 (?,1b(B . "a^") ; 226
+ − 105 (?,1c(B . "a~") ; 227
+ − 106 (?,1d(B . "a?") ; 228
+ − 107 (?,1e(B . "a(") ; 229
+ − 108 (?,1f(B . "u+~") ; 230
+ − 109 (?,1g(B . "a^~") ; 231
+ − 110 (?,1h(B . "e`") ; 232
+ − 111 (?,1i(B . "e'") ; 233
+ − 112 (?,1j(B . "e^") ; 234
+ − 113 (?,1k(B . "e?") ; 235
+ − 114 (?,1l(B . "i`") ; 236
+ − 115 (?,1m(B . "i'") ; 237
+ − 116 (?,1n(B . "i~") ; 238
+ − 117 (?,1o(B . "i?") ; 239
+ − 118 (?,1p(B . "dd") ; 240
+ − 119 (?,1q(B . "u+.") ; 241
+ − 120 (?,1r(B . "o`") ; 242
+ − 121 (?,1s(B . "o'") ; 243
+ − 122 (?,1t(B . "o^") ; 244
+ − 123 (?,1u(B . "o~") ; 245
+ − 124 (?,1v(B . "o?") ; 246
+ − 125 (?,1w(B . "o.") ; 247
+ − 126 (?,1x(B . "u.") ; 248
+ − 127 (?,1y(B . "u`") ; 249
+ − 128 (?,1z(B . "u'") ; 250
+ − 129 (?,1{(B . "u~") ; 251
+ − 130 (?,1|(B . "u?") ; 252
+ − 131 (?,1}(B . "y'") ; 253
+ − 132 (?,1~(B . "o+.") ; 254
+ − 133
+ − 134 ;; upper case
+ − 135 (?,2!(B . "A('") ; 161
+ − 136 (?,2"(B . "A(`") ; 162
+ − 137 (?,2#(B . "A(.") ; 163
+ − 138 (?,2$(B . "A^'") ; 164
+ − 139 (?,2%(B . "A^`") ; 165
+ − 140 (?,2&(B . "A^?") ; 166
+ − 141 (?,2'(B . "A^.") ; 167
+ − 142 (?,2((B . "E~") ; 168
+ − 143 (?,2)(B . "E.") ; 169
+ − 144 (?,2*(B . "E^'") ; 170
+ − 145 (?,2+(B . "E^`") ; 171
+ − 146 (?,2,(B . "E^?") ; 172
+ − 147 (?,2-(B . "E^~") ; 173
+ − 148 (?,2.(B . "E^.") ; 174
+ − 149 (?,2/(B . "O^'") ; 175
+ − 150 (?,20(B . "O^`") ; 176
+ − 151 (?,21(B . "O^?") ; 177
+ − 152 (?,22(B . "O^~") ; 178
+ − 153 (?,25(B . "O^.") ; 181
+ − 154 (?,26(B . "O+`") ; 182
+ − 155 (?,27(B . "O+?") ; 183
+ − 156 (?,28(B . "I.") ; 184
+ − 157 (?,2=(B . "O+") ; 189
+ − 158 (?,2>(B . "O+'") ; 190
+ − 159 (?,2F(B . "A(?") ; 198
+ − 160 (?,2G(B . "A(~") ; 199
+ − 161 (?,2O(B . "Y`") ; 207
+ − 162 (?,2Q(B . "U+'") ; 209
+ − 163 (?,2U(B . "A.") ; 213
+ − 164 (?,2V(B . "Y?") ; 214
+ − 165 (?,2W(B . "U+`") ; 215
+ − 166 (?,2X(B . "U+?") ; 216
+ − 167 (?,2[(B . "Y~") ; 219
+ − 168 (?,2\(B . "Y.") ; 220
+ − 169 (?,2^(B . "O+~") ; 222
+ − 170 (?,2_(B . "U+") ; 223
+ − 171 (?,2`(B . "A`") ; 224
+ − 172 (?,2a(B . "A'") ; 225
+ − 173 (?,2b(B . "A^") ; 226
+ − 174 (?,2c(B . "A~") ; 227
+ − 175 (?,2d(B . "A?") ; 228
+ − 176 (?,2e(B . "A(") ; 229
+ − 177 (?,2f(B . "U+~") ; 230
+ − 178 (?,2g(B . "A^~") ; 231
+ − 179 (?,2h(B . "E`") ; 232
+ − 180 (?,2i(B . "E'") ; 233
+ − 181 (?,2j(B . "E^") ; 234
+ − 182 (?,2k(B . "E?") ; 235
+ − 183 (?,2l(B . "I`") ; 236
+ − 184 (?,2m(B . "I'") ; 237
+ − 185 (?,2n(B . "I~") ; 238
+ − 186 (?,2o(B . "I?") ; 239
+ − 187 (?,2p(B . "DD") ; 240
+ − 188 (?,2p(B . "dD") ; 240
+ − 189 (?,2p(B . "Dd") ; 240
+ − 190 (?,2q(B . "U+.") ; 241
+ − 191 (?,2r(B . "O`") ; 242
+ − 192 (?,2s(B . "O'") ; 243
+ − 193 (?,2t(B . "O^") ; 244
+ − 194 (?,2u(B . "O~") ; 245
+ − 195 (?,2v(B . "O?") ; 246
+ − 196 (?,2w(B . "O.") ; 247
+ − 197 (?,2x(B . "U.") ; 248
+ − 198 (?,2y(B . "U`") ; 249
+ − 199 (?,2z(B . "U'") ; 250
+ − 200 (?,2{(B . "U~") ; 251
+ − 201 (?,2|(B . "U?") ; 252
+ − 202 (?,2}(B . "Y'") ; 253
+ − 203 (?,2~(B . "O+.") ; 254
+ − 204
+ − 205 ;; escape from composition
+ − 206 (?\( . "\\(") ; breve (left parenthesis)
+ − 207 (?^ . "\\^") ; circumflex (caret)
+ − 208 (?+ . "\\+") ; horn (plus sign)
+ − 209 (?' . "\\'") ; acute (apostrophe)
+ − 210 (?` . "\\`") ; grave (backquote)
+ − 211 (?? . "\\?") ; hook above (question mark)
+ − 212 (?~ . "\\~") ; tilde (tilde)
+ − 213 (?. . "\\.") ; dot below (period)
+ − 214 (?d . "\\d") ; d-bar (d)
+ − 215 (?\\ . "\\\\") ; literal backslash
+ − 216 )
+ − 217 "Alist of Vietnamese characters vs corresponding `VIQR' string.")
+ − 218
+ − 219 ;; Regular expression matching single Vietnamese character represented
+ − 220 ;; by VIQR.
+ − 221 (defconst viqr-regexp
+ − 222 "[aeiouyAEIOUY]\\([(^+]?['`?~.]\\|[(^+]\\)\\|[Dd][Dd]")
+ − 223
+ − 224 ;;;###autoload
+ − 225 (defun viet-decode-viqr-region (from to)
+ − 226 "Convert `VIQR' mnemonics of the current region to Vietnamese characaters.
+ − 227 When called from a program, expects two arguments,
+ − 228 positions (integers or markers) specifying the stretch of the region."
+ − 229 (interactive "r")
+ − 230 (save-restriction
+ − 231 (narrow-to-region from to)
+ − 232 (goto-char (point-min))
+ − 233 (while (re-search-forward viqr-regexp nil t)
+ − 234 (let* ((viqr (buffer-substring (match-beginning 0) (match-end 0)))
+ − 235 (ch (car (rassoc viqr viet-viqr-alist))))
+ − 236 (if ch
+ − 237 (progn
+ − 238 (delete-region (match-beginning 0) (match-end 0))
+ − 239 (insert ch)))))))
+ − 240
+ − 241 ;;;###autoload
+ − 242 (defun viet-decode-viqr-buffer ()
+ − 243 "Convert `VIQR' mnemonics of the current buffer to Vietnamese characaters."
+ − 244 (interactive)
+ − 245 (viet-decode-viqr-region (point-min) (point-max)))
+ − 246
+ − 247 ;;;###autoload
+ − 248 (defun viet-encode-viqr-region (from to)
+ − 249 "Convert Vietnamese characaters of the current region to `VIQR' mnemonics.
+ − 250 When called from a program, expects two arguments,
+ − 251 positions (integers or markers) specifying the stretch of the region."
+ − 252 (interactive "r")
+ − 253 (save-restriction
+ − 254 (narrow-to-region from to)
+ − 255 (goto-char (point-min))
+ − 256 (while (re-search-forward "\\cv" nil t)
+ − 257 (let* ((ch (preceding-char))
+ − 258 (viqr (cdr (assq ch viet-viqr-alist))))
+ − 259 (if viqr
+ − 260 (progn
+ − 261 (delete-char -1)
+ − 262 (insert viqr)))))))
+ − 263
+ − 264 ;;;###autoload
+ − 265 (defun viet-encode-viqr-buffer ()
+ − 266 "Convert Vietnamese characaters of the current buffer to `VIQR' mnemonics."
+ − 267 (interactive)
+ − 268 (viet-encode-viqr-region (point-min) (point-max)))
+ − 269
+ − 270 ;;;###autoload
+ − 271 (defun viqr-post-read-conversion (len)
+ − 272 (save-excursion
+ − 273 (save-restriction
+ − 274 (narrow-to-region (point) (+ (point) len))
+ − 275 (let ((buffer-modified-p (buffer-modified-p)))
+ − 276 (viet-decode-viqr-region (point-min) (point-max))
+ − 277 (set-buffer-modified-p buffer-modified-p)
+ − 278 (- (point-max) (point-min))))))
+ − 279
+ − 280 ;;;###autoload
+ − 281 (defun viqr-pre-write-conversion (from to)
+ − 282 (let ((old-buf (current-buffer)))
+ − 283 (set-buffer (generate-new-buffer " *temp*"))
+ − 284 (if (stringp from)
+ − 285 (insert from)
+ − 286 (insert-buffer-substring old-buf from to))
+ − 287 (viet-encode-viqr-region (point-min) (point-max))
+ − 288 ;; Should return nil as annotations.
+ − 289 nil))
+ − 290
+ − 291 ;;;
+ − 292 (provide 'viet-util)
+ − 293
+ − 294 ;;; viet-util.el ends here