298 lines
9.7 KiB
EmacsLisp
298 lines
9.7 KiB
EmacsLisp
;;; viet-util.el --- utilities for Vietnamese -*- coding: iso-2022-7bit; -*-
|
||
|
||
;; Copyright (C) 1998 Free Software Foundation, Inc.
|
||
;; Copyright (C) 1995, 1997
|
||
;; National Institute of Advanced Industrial Science and Technology (AIST)
|
||
;; Registration Number H14PRO021
|
||
|
||
;; Keywords: mule, multilingual, Vietnamese
|
||
|
||
;; This file is part of GNU Emacs.
|
||
|
||
;; GNU Emacs is free software; you can redistribute it and/or modify
|
||
;; it under the terms of the GNU General Public License as published by
|
||
;; the Free Software Foundation; either version 2, or (at your option)
|
||
;; any later version.
|
||
|
||
;; GNU Emacs is distributed in the hope that it will be useful,
|
||
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;; GNU General Public License for more details.
|
||
|
||
;; You should have received a copy of the GNU General Public License
|
||
;; along with GNU Emacs; see the file COPYING. If not, write to the
|
||
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
||
;; Boston, MA 02110-1301, USA.
|
||
|
||
;;; Commentary:
|
||
|
||
;; Vietnamese uses ASCII characters and additional 134 unique
|
||
;; characters (these are Latin alphabets with various diacritical and
|
||
;; tone marks). As far as I know, Vietnamese now has 5 different ways
|
||
;; for representing these characters: VISCII, TCVN-5712, VPS, VIQR,
|
||
;; and Unicode. VISCII, TCVN-5712 and VPS are simple 1-byte code
|
||
;; which assigns 134 unique characters in control-code area
|
||
;; (0x00..0x1F) and right half area (0x80..0xFF). VIQR is a menmonic
|
||
;; encoding specification representing diacritical marks by following
|
||
;; ASCII characters.
|
||
|
||
;;; Code:
|
||
|
||
(defvar viet-viscii-nonascii-translation-table)
|
||
|
||
;;;###autoload
|
||
(defun viet-encode-viscii-char (char)
|
||
"Return VISCII character code of CHAR if appropriate."
|
||
(aref (char-table-extra-slot viet-viscii-nonascii-translation-table 0)
|
||
char))
|
||
|
||
;; VIQR is a menmonic encoding specification for Vietnamese.
|
||
;; It represents diacritical marks by ASCII characters as follows:
|
||
;; ------------+----------+--------
|
||
;; mark | mnemonic | example
|
||
;; ------------+----------+---------
|
||
;; breve | ( | a( -> ,1e(B
|
||
;; circumflex | ^ | a^ -> ,1b(B
|
||
;; horn | + | o+ -> ,1=(B
|
||
;; ------------+----------+---------
|
||
;; acute | ' | a' -> ,1a(B
|
||
;; grave | ` | a` -> ,1`(B
|
||
;; hook above | ? | a? -> ,1d(B
|
||
;; tilde | ~ | a~ -> ,1c(B
|
||
;; dot below | . | a. -> ,1U(B
|
||
;; ------------+----------+---------
|
||
;; d bar | dd | dd -> ,1p(B
|
||
;; ------------+----------+---------
|
||
|
||
(defvar viet-viqr-alist
|
||
'(;; lowercase
|
||
(?,1!(B . "a('") ; 161
|
||
(?,1"(B . "a(`") ; 162
|
||
(?,1#(B . "a(.") ; 163
|
||
(?,1$(B . "a^'") ; 164
|
||
(?,1%(B . "a^`") ; 165
|
||
(?,1&(B . "a^?") ; 166
|
||
(?,1'(B . "a^.") ; 167
|
||
(?,1((B . "e~") ; 168
|
||
(?,1)(B . "e.") ; 169
|
||
(?,1*(B . "e^'") ; 170
|
||
(?,1+(B . "e^`") ; 171
|
||
(?,1,(B . "e^?") ; 172
|
||
(?,1-(B . "e^~") ; 173
|
||
(?,1.(B . "e^.") ; 174
|
||
(?,1/(B . "o^'") ; 175
|
||
(?,10(B . "o^`") ; 176
|
||
(?,11(B . "o^?") ; 177
|
||
(?,12(B . "o^~") ; 178
|
||
(?,15(B . "o^.") ; 181
|
||
(?,16(B . "o+`") ; 182
|
||
(?,17(B . "o+?") ; 183
|
||
(?,18(B . "i.") ; 184
|
||
(?,1=(B . "o+") ; 189
|
||
(?,1>(B . "o+'") ; 190
|
||
(?,1F(B . "a(?") ; 198
|
||
(?,1G(B . "a(~") ; 199
|
||
(?,1O(B . "y`") ; 207
|
||
(?,1Q(B . "u+'") ; 209
|
||
(?,1U(B . "a.") ; 213
|
||
(?,1V(B . "y?") ; 214
|
||
(?,1W(B . "u+`") ; 215
|
||
(?,1X(B . "u+?") ; 216
|
||
(?,1[(B . "y~") ; 219
|
||
(?,1\(B . "y.") ; 220
|
||
(?,1^(B . "o+~") ; 222
|
||
(?,1_(B . "u+") ; 223
|
||
(?,1`(B . "a`") ; 224
|
||
(?,1a(B . "a'") ; 225
|
||
(?,1b(B . "a^") ; 226
|
||
(?,1c(B . "a~") ; 227
|
||
(?,1d(B . "a?") ; 228
|
||
(?,1e(B . "a(") ; 229
|
||
(?,1f(B . "u+~") ; 230
|
||
(?,1g(B . "a^~") ; 231
|
||
(?,1h(B . "e`") ; 232
|
||
(?,1i(B . "e'") ; 233
|
||
(?,1j(B . "e^") ; 234
|
||
(?,1k(B . "e?") ; 235
|
||
(?,1l(B . "i`") ; 236
|
||
(?,1m(B . "i'") ; 237
|
||
(?,1n(B . "i~") ; 238
|
||
(?,1o(B . "i?") ; 239
|
||
(?,1p(B . "dd") ; 240
|
||
(?,1q(B . "u+.") ; 241
|
||
(?,1r(B . "o`") ; 242
|
||
(?,1s(B . "o'") ; 243
|
||
(?,1t(B . "o^") ; 244
|
||
(?,1u(B . "o~") ; 245
|
||
(?,1v(B . "o?") ; 246
|
||
(?,1w(B . "o.") ; 247
|
||
(?,1x(B . "u.") ; 248
|
||
(?,1y(B . "u`") ; 249
|
||
(?,1z(B . "u'") ; 250
|
||
(?,1{(B . "u~") ; 251
|
||
(?,1|(B . "u?") ; 252
|
||
(?,1}(B . "y'") ; 253
|
||
(?,1~(B . "o+.") ; 254
|
||
|
||
;; upper case
|
||
(?,2!(B . "A('") ; 161
|
||
(?,2"(B . "A(`") ; 162
|
||
(?,2#(B . "A(.") ; 163
|
||
(?,2$(B . "A^'") ; 164
|
||
(?,2%(B . "A^`") ; 165
|
||
(?,2&(B . "A^?") ; 166
|
||
(?,2'(B . "A^.") ; 167
|
||
(?,2((B . "E~") ; 168
|
||
(?,2)(B . "E.") ; 169
|
||
(?,2*(B . "E^'") ; 170
|
||
(?,2+(B . "E^`") ; 171
|
||
(?,2,(B . "E^?") ; 172
|
||
(?,2-(B . "E^~") ; 173
|
||
(?,2.(B . "E^.") ; 174
|
||
(?,2/(B . "O^'") ; 175
|
||
(?,20(B . "O^`") ; 176
|
||
(?,21(B . "O^?") ; 177
|
||
(?,22(B . "O^~") ; 178
|
||
(?,25(B . "O^.") ; 181
|
||
(?,26(B . "O+`") ; 182
|
||
(?,27(B . "O+?") ; 183
|
||
(?,28(B . "I.") ; 184
|
||
(?,2=(B . "O+") ; 189
|
||
(?,2>(B . "O+'") ; 190
|
||
(?,2F(B . "A(?") ; 198
|
||
(?,2G(B . "A(~") ; 199
|
||
(?,2O(B . "Y`") ; 207
|
||
(?,2Q(B . "U+'") ; 209
|
||
(?,2U(B . "A.") ; 213
|
||
(?,2V(B . "Y?") ; 214
|
||
(?,2W(B . "U+`") ; 215
|
||
(?,2X(B . "U+?") ; 216
|
||
(?,2[(B . "Y~") ; 219
|
||
(?,2\(B . "Y.") ; 220
|
||
(?,2^(B . "O+~") ; 222
|
||
(?,2_(B . "U+") ; 223
|
||
(?,2`(B . "A`") ; 224
|
||
(?,2a(B . "A'") ; 225
|
||
(?,2b(B . "A^") ; 226
|
||
(?,2c(B . "A~") ; 227
|
||
(?,2d(B . "A?") ; 228
|
||
(?,2e(B . "A(") ; 229
|
||
(?,2f(B . "U+~") ; 230
|
||
(?,2g(B . "A^~") ; 231
|
||
(?,2h(B . "E`") ; 232
|
||
(?,2i(B . "E'") ; 233
|
||
(?,2j(B . "E^") ; 234
|
||
(?,2k(B . "E?") ; 235
|
||
(?,2l(B . "I`") ; 236
|
||
(?,2m(B . "I'") ; 237
|
||
(?,2n(B . "I~") ; 238
|
||
(?,2o(B . "I?") ; 239
|
||
(?,2p(B . "DD") ; 240
|
||
(?,2p(B . "dD") ; 240
|
||
(?,2p(B . "Dd") ; 240
|
||
(?,2q(B . "U+.") ; 241
|
||
(?,2r(B . "O`") ; 242
|
||
(?,2s(B . "O'") ; 243
|
||
(?,2t(B . "O^") ; 244
|
||
(?,2u(B . "O~") ; 245
|
||
(?,2v(B . "O?") ; 246
|
||
(?,2w(B . "O.") ; 247
|
||
(?,2x(B . "U.") ; 248
|
||
(?,2y(B . "U`") ; 249
|
||
(?,2z(B . "U'") ; 250
|
||
(?,2{(B . "U~") ; 251
|
||
(?,2|(B . "U?") ; 252
|
||
(?,2}(B . "Y'") ; 253
|
||
(?,2~(B . "O+.") ; 254
|
||
|
||
;; escape from composition
|
||
(?\( . "\\(") ; breve (left parenthesis)
|
||
(?^ . "\\^") ; circumflex (caret)
|
||
(?+ . "\\+") ; horn (plus sign)
|
||
(?' . "\\'") ; acute (apostrophe)
|
||
(?` . "\\`") ; grave (backquote)
|
||
(?? . "\\?") ; hook above (question mark)
|
||
(?~ . "\\~") ; tilde (tilde)
|
||
(?. . "\\.") ; dot below (period)
|
||
(?d . "\\d") ; d-bar (d)
|
||
(?\\ . "\\\\") ; literal backslash
|
||
)
|
||
"Alist of Vietnamese characters vs corresponding `VIQR' string.")
|
||
|
||
;; Regular expression matching single Vietnamese character represented
|
||
;; by VIQR.
|
||
(defconst viqr-regexp
|
||
"[aeiouyAEIOUY]\\([(^+]?['`?~.]\\|[(^+]\\)\\|[Dd][Dd]")
|
||
|
||
;;;###autoload
|
||
(defun viet-decode-viqr-region (from to)
|
||
"Convert `VIQR' mnemonics of the current region to Vietnamese characters.
|
||
When called from a program, expects two arguments,
|
||
positions (integers or markers) specifying the stretch of the region."
|
||
(interactive "r")
|
||
(save-restriction
|
||
(narrow-to-region from to)
|
||
(goto-char (point-min))
|
||
(while (re-search-forward viqr-regexp nil t)
|
||
(let* ((viqr (buffer-substring (match-beginning 0) (match-end 0)))
|
||
(ch (car (rassoc viqr viet-viqr-alist))))
|
||
(if ch
|
||
(progn
|
||
(delete-region (match-beginning 0) (match-end 0))
|
||
(insert ch)))))))
|
||
|
||
;;;###autoload
|
||
(defun viet-decode-viqr-buffer ()
|
||
"Convert `VIQR' mnemonics of the current buffer to Vietnamese characters."
|
||
(interactive)
|
||
(viet-decode-viqr-region (point-min) (point-max)))
|
||
|
||
;;;###autoload
|
||
(defun viet-encode-viqr-region (from to)
|
||
"Convert Vietnamese characters of the current region to `VIQR' mnemonics.
|
||
When called from a program, expects two arguments,
|
||
positions (integers or markers) specifying the stretch of the region."
|
||
(interactive "r")
|
||
(save-restriction
|
||
(narrow-to-region from to)
|
||
(goto-char (point-min))
|
||
(while (re-search-forward "\\cv" nil t)
|
||
(let* ((ch (preceding-char))
|
||
(viqr (cdr (assq ch viet-viqr-alist))))
|
||
(if viqr
|
||
(progn
|
||
(delete-char -1)
|
||
(insert viqr)))))))
|
||
|
||
;;;###autoload
|
||
(defun viet-encode-viqr-buffer ()
|
||
"Convert Vietnamese characters of the current buffer to `VIQR' mnemonics."
|
||
(interactive)
|
||
(viet-encode-viqr-region (point-min) (point-max)))
|
||
|
||
;;;###autoload
|
||
(defun viqr-post-read-conversion (len)
|
||
(save-excursion
|
||
(save-restriction
|
||
(narrow-to-region (point) (+ (point) len))
|
||
(let ((buffer-modified-p (buffer-modified-p)))
|
||
(viet-decode-viqr-region (point-min) (point-max))
|
||
(set-buffer-modified-p buffer-modified-p)
|
||
(- (point-max) (point-min))))))
|
||
|
||
;;;###autoload
|
||
(defun viqr-pre-write-conversion (from to)
|
||
(let ((old-buf (current-buffer)))
|
||
(set-buffer (generate-new-buffer " *temp*"))
|
||
(if (stringp from)
|
||
(insert from)
|
||
(insert-buffer-substring old-buf from to))
|
||
(viet-encode-viqr-region (point-min) (point-max))
|
||
;; Should return nil as annotations.
|
||
nil))
|
||
|
||
;;;
|
||
(provide 'viet-util)
|
||
|
||
;;; arch-tag: 082a4d3b-168f-45b4-b3e1-82bfa1b5a194
|
||
;;; viet-util.el ends here
|