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Most of this change is to boilerplate commentary such as license URLs. This change was prompted by ftp://ftp.gnu.org's going-away party, planned for November. Change these FTP URLs to https://ftp.gnu.org instead. Make similar changes for URLs to other organizations moving away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and fsf.org when this works, as this will further help defend against man-in-the-middle attacks (for this part I omitted the MS-DOS and MS-Windows sources and the test tarballs to keep the workload down). HTTPS is not fully working to lists.gnu.org so I left those URLs alone for now.
299 lines
9.1 KiB
EmacsLisp
299 lines
9.1 KiB
EmacsLisp
;;; viet-util.el --- utilities for Vietnamese -*- coding: utf-8; -*-
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;; Copyright (C) 1998, 2001-2017 Free Software Foundation, Inc.
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;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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;; 2005, 2006, 2007, 2008, 2009, 2010, 2011
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;; National Institute of Advanced Industrial Science and Technology (AIST)
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;; Registration Number H14PRO021
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;; Copyright (C) 2003
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;; National Institute of Advanced Industrial Science and Technology (AIST)
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;; Registration Number H13PRO009
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;; Keywords: mule, multilingual, Vietnamese
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Vietnamese uses ASCII characters and additional 134 unique
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;; characters (these are Latin alphabets with various diacritical and
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;; tone marks). As far as I know, Vietnamese now has 5 different ways
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;; for representing these characters: VISCII, TCVN-5712, VPS, VIQR,
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;; and Unicode. VISCII, TCVN-5712 and VPS are simple 1-byte code
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;; which assigns 134 unique characters in control-code area
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;; (0x00..0x1F) and right half area (0x80..0xFF). VIQR is a mnemonic
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;; encoding specification representing diacritical marks by following
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;; ASCII characters.
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;;; Code:
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(defvar viet-viscii-nonascii-translation-table)
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;;;###autoload
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(defun viet-encode-viscii-char (char)
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"Return VISCII character code of CHAR if appropriate."
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(encode-char char 'viscii))
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;; VIQR is a mnemonic encoding specification for Vietnamese.
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;; It represents diacritical marks by ASCII characters as follows:
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;; ------------+----------+--------
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;; mark | mnemonic | example
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;; ------------+----------+---------
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;; breve | ( | a( -> ă
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;; circumflex | ^ | a^ -> â
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;; horn | + | o+ -> ơ
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;; ------------+----------+---------
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;; acute | ' | a' -> á
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;; grave | ` | a` -> à
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;; hook above | ? | a? -> ả
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;; tilde | ~ | a~ -> ã
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;; dot below | . | a. -> ạ
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;; ------------+----------+---------
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;; d bar | dd | dd -> đ
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;; ------------+----------+---------
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(defvar viet-viqr-alist
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'(;; lowercase
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(?ắ . "a('") ; 161
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(?ằ . "a(`") ; 162
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(?ặ . "a(.") ; 163
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(?ấ . "a^'") ; 164
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(?ầ . "a^`") ; 165
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(?ẩ . "a^?") ; 166
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(?ậ . "a^.") ; 167
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(?ẽ . "e~") ; 168
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(?ẹ . "e.") ; 169
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(?ế . "e^'") ; 170
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(?ề . "e^`") ; 171
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(?ể . "e^?") ; 172
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(?ễ . "e^~") ; 173
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(?ệ . "e^.") ; 174
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(?ố . "o^'") ; 175
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(?ồ . "o^`") ; 176
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(?ổ . "o^?") ; 177
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(?ỗ . "o^~") ; 178
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(?ộ . "o^.") ; 181
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(?ờ . "o+`") ; 182
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(?ở . "o+?") ; 183
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(?ị . "i.") ; 184
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(?ơ . "o+") ; 189
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(?ớ . "o+'") ; 190
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(?ẳ . "a(?") ; 198
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(?ẵ . "a(~") ; 199
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(?ỳ . "y`") ; 207
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(?ứ . "u+'") ; 209
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(?ạ . "a.") ; 213
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(?ỷ . "y?") ; 214
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(?ừ . "u+`") ; 215
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(?ử . "u+?") ; 216
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(?ỹ . "y~") ; 219
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(?ỵ . "y.") ; 220
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(?ỡ . "o+~") ; 222
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(?ư . "u+") ; 223
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(?à . "a`") ; 224
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(?á . "a'") ; 225
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(?â . "a^") ; 226
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(?ã . "a~") ; 227
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(?ả . "a?") ; 228
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(?ă . "a(") ; 229
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(?ữ . "u+~") ; 230
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(?ẫ . "a^~") ; 231
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(?è . "e`") ; 232
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(?é . "e'") ; 233
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(?ê . "e^") ; 234
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(?ẻ . "e?") ; 235
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(?ì . "i`") ; 236
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(?í . "i'") ; 237
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(?ĩ . "i~") ; 238
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(?ỉ . "i?") ; 239
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(?đ . "dd") ; 240
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(?ự . "u+.") ; 241
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(?ò . "o`") ; 242
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(?ó . "o'") ; 243
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(?ô . "o^") ; 244
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(?õ . "o~") ; 245
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(?ỏ . "o?") ; 246
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(?ọ . "o.") ; 247
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(?ụ . "u.") ; 248
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(?ù . "u`") ; 249
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(?ú . "u'") ; 250
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(?ũ . "u~") ; 251
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(?ủ . "u?") ; 252
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(?ý . "y'") ; 253
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(?ợ . "o+.") ; 254
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;; upper case
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(?Ắ . "A('") ; 161
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(?Ằ . "A(`") ; 162
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(?Ặ . "A(.") ; 163
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(?Ấ . "A^'") ; 164
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(?Ầ . "A^`") ; 165
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(?Ẩ . "A^?") ; 166
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(?Ậ . "A^.") ; 167
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(?Ẽ . "E~") ; 168
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(?Ẹ . "E.") ; 169
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(?Ế . "E^'") ; 170
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(?Ề . "E^`") ; 171
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(?Ể . "E^?") ; 172
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(?Ễ . "E^~") ; 173
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(?Ệ . "E^.") ; 174
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(?Ố . "O^'") ; 175
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(?Ồ . "O^`") ; 176
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(?Ổ . "O^?") ; 177
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(?Ỗ . "O^~") ; 178
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(?Ộ . "O^.") ; 181
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(?Ờ . "O+`") ; 182
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(?Ở . "O+?") ; 183
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(?Ị . "I.") ; 184
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(?Ơ . "O+") ; 189
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(?Ớ . "O+'") ; 190
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(?Ẳ . "A(?") ; 198
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(?Ẵ . "A(~") ; 199
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(?Ỳ . "Y`") ; 207
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(?Ứ . "U+'") ; 209
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(?Ạ . "A.") ; 213
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(?Ỷ . "Y?") ; 214
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(?Ừ . "U+`") ; 215
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(?Ử . "U+?") ; 216
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(?Ỹ . "Y~") ; 219
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(?Ỵ . "Y.") ; 220
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(?Ỡ . "O+~") ; 222
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(?Ư . "U+") ; 223
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(?À . "A`") ; 224
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(?Á . "A'") ; 225
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(? . "A^") ; 226
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(?Ã . "A~") ; 227
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(?Ả . "A?") ; 228
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(?Ă . "A(") ; 229
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(?Ữ . "U+~") ; 230
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(?Ẫ . "A^~") ; 231
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(?È . "E`") ; 232
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(?É . "E'") ; 233
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(?Ê . "E^") ; 234
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(?Ẻ . "E?") ; 235
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(?Ì . "I`") ; 236
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(?Í . "I'") ; 237
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(?Ĩ . "I~") ; 238
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(?Ỉ . "I?") ; 239
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(?Đ . "DD") ; 240
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(?Đ . "dD") ; 240
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(?Đ . "Dd") ; 240
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(?Ự . "U+.") ; 241
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(?Ò . "O`") ; 242
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(?Ó . "O'") ; 243
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(?Ô . "O^") ; 244
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(?Õ . "O~") ; 245
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(?Ỏ . "O?") ; 246
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(?Ọ . "O.") ; 247
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(?Ụ . "U.") ; 248
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(?Ù . "U`") ; 249
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(?Ú . "U'") ; 250
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(?Ũ . "U~") ; 251
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(?Ủ . "U?") ; 252
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(?Ý . "Y'") ; 253
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(?Ợ . "O+.") ; 254
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;; escape from composition
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(?\( . "\\(") ; breve (left parenthesis)
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(?^ . "\\^") ; circumflex (caret)
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(?+ . "\\+") ; horn (plus sign)
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(?' . "\\'") ; acute (apostrophe)
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(?` . "\\`") ; grave (backquote)
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(?? . "\\?") ; hook above (question mark)
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(?~ . "\\~") ; tilde (tilde)
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(?. . "\\.") ; dot below (period)
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(?d . "\\d") ; d-bar (d)
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(?\\ . "\\\\") ; literal backslash
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)
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"Alist of Vietnamese characters vs corresponding `VIQR' string.")
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;; Regular expression matching single Vietnamese character represented
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;; by VIQR.
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(defconst viqr-regexp
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"[aeiouyAEIOUY]\\([(^+]?['`?~.]\\|[(^+]\\)\\|[Dd][Dd]")
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;;;###autoload
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(defun viet-decode-viqr-region (from to)
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"Convert `VIQR' mnemonics of the current region to Vietnamese characters.
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When called from a program, expects two arguments,
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positions (integers or markers) specifying the stretch of the region."
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(interactive "r")
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(save-restriction
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(narrow-to-region from to)
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(goto-char (point-min))
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(while (re-search-forward viqr-regexp nil t)
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(let* ((viqr (buffer-substring (match-beginning 0) (match-end 0)))
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(ch (car (rassoc viqr viet-viqr-alist))))
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(if ch
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(progn
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(delete-region (match-beginning 0) (match-end 0))
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(insert ch)))))))
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;;;###autoload
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(defun viet-decode-viqr-buffer ()
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"Convert `VIQR' mnemonics of the current buffer to Vietnamese characters."
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(interactive)
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(viet-decode-viqr-region (point-min) (point-max)))
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;;;###autoload
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(defun viet-encode-viqr-region (from to)
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"Convert Vietnamese characters of the current region to `VIQR' mnemonics.
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When called from a program, expects two arguments,
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positions (integers or markers) specifying the stretch of the region."
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(interactive "r")
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(save-restriction
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(narrow-to-region from to)
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(goto-char (point-min))
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(while (re-search-forward "\\cv" nil t)
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(let* ((ch (preceding-char))
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(viqr (cdr (assq ch viet-viqr-alist))))
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(if viqr
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(progn
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(delete-char -1)
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(insert viqr)))))))
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;;;###autoload
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(defun viet-encode-viqr-buffer ()
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"Convert Vietnamese characters of the current buffer to `VIQR' mnemonics."
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(interactive)
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(viet-encode-viqr-region (point-min) (point-max)))
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;;;###autoload
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(defun viqr-post-read-conversion (len)
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(save-excursion
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(save-restriction
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(narrow-to-region (point) (+ (point) len))
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(let ((buffer-modified-p (buffer-modified-p)))
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(viet-decode-viqr-region (point-min) (point-max))
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(set-buffer-modified-p buffer-modified-p)
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(- (point-max) (point-min))))))
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;;;###autoload
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(defun viqr-pre-write-conversion (from to)
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(let ((old-buf (current-buffer)))
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(set-buffer (generate-new-buffer " *temp*"))
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(if (stringp from)
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(insert from)
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(insert-buffer-substring old-buf from to))
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(viet-encode-viqr-region (point-min) (point-max))
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;; Should return nil as annotations.
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nil))
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;;;
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(provide 'viet-util)
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;;; viet-util.el ends here
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