/
mcs-xm.el
207 lines (175 loc) · 6.64 KB
/
mcs-xm.el
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
;;; mcs-xm.el --- MIME charset implementation for XEmacs-mule
;; Copyright (C) 1997,1998 Free Software Foundation, Inc.
;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Keywords: emulation, compatibility, Mule
;; This file is part of APEL (A Portable Emacs Library).
;; This program 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.
;; This program 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., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; This module requires Emacs 20.0.93, XEmacs 20.3-b5 (with mule)
;; or later.
;;; Code:
(require 'mcs-20)
(defun encode-mime-charset-region (start end charset)
"Encode the text between START and END as MIME CHARSET."
(let ((cs (mime-charset-to-coding-system charset)))
(if cs
(encode-coding-region start end cs)
)))
(defcustom mime-charset-decoder-alist
'((iso-2022-jp . decode-mime-charset-region-with-iso646-unification)
(iso-2022-jp-2 . decode-mime-charset-region-with-iso646-unification)
(x-ctext . decode-mime-charset-region-with-iso646-unification)
(hz-gb-2312 . decode-mime-charset-region-for-hz)
(t . decode-mime-charset-region-default))
"Alist MIME-charset vs. decoder function."
:group 'i18n
:type '(repeat (cons mime-charset function)))
(defsubst decode-mime-charset-region-default (start end charset lbt)
(let ((cs (mime-charset-to-coding-system charset lbt)))
(if cs
(decode-coding-region start end cs)
)))
(defcustom mime-iso646-character-unification-alist
(eval-when-compile
(let (dest
(i 33))
(while (< i 92)
(setq dest
(cons (cons (char-to-string (make-char 'latin-jisx0201 i))
(format "%c" i))
dest))
(setq i (1+ i)))
(setq i 93)
(while (< i 126)
(setq dest
(cons (cons (char-to-string (make-char 'latin-jisx0201 i))
(format "%c" i))
dest))
(setq i (1+ i)))
(nreverse dest)))
"Alist unified string vs. canonical string."
:group 'i18n
:type '(repeat (cons string string)))
(defcustom mime-unified-character-face nil
"*Face of unified character."
:group 'i18n
:type 'face)
(defcustom mime-character-unification-limit-size 2048
"*Limit size to unify characters."
:group 'i18n
:type 'integer)
(defun decode-mime-charset-region-with-iso646-unification (start end charset
lbt)
(decode-mime-charset-region-default start end charset lbt)
(if (<= (- end start) mime-character-unification-limit-size)
(save-excursion
(let ((rest mime-iso646-character-unification-alist))
(while rest
(let ((pair (car rest)))
(goto-char (point-min))
(while (search-forward (car pair) nil t)
(let ((str (cdr pair)))
(put-text-property 0 (length str)
'face mime-unified-character-face str)
(replace-match str 'fixed-case 'literal)
)
))
(setq rest (cdr rest)))))
))
(defun decode-mime-charset-region-for-hz (start end charset lbt)
(if lbt
(save-restriction
(narrow-to-region start end)
(decode-coding-region (point-min)(point-max)
(mime-charset-to-coding-system 'raw-text lbt))
(decode-hz-region (point-min)(point-max)))
(decode-hz-region start end)))
(defun decode-mime-charset-region (start end charset &optional lbt)
"Decode the text between START and END as MIME CHARSET."
(if (stringp charset)
(setq charset (intern (downcase charset)))
)
(let ((func (cdr (or (assq charset mime-charset-decoder-alist)
(assq t mime-charset-decoder-alist)))))
(funcall func start end charset lbt)))
(defsubst encode-mime-charset-string (string charset)
"Encode the STRING as MIME CHARSET."
(let ((cs (mime-charset-to-coding-system charset)))
(if cs
(encode-coding-string string cs)
string)))
;; (defsubst decode-mime-charset-string (string charset)
;; "Decode the STRING as MIME CHARSET."
;; (let ((cs (mime-charset-to-coding-system charset)))
;; (if cs
;; (decode-coding-string string cs)
;; string)))
(defun decode-mime-charset-string (string charset &optional lbt)
"Decode the STRING as MIME CHARSET."
(with-temp-buffer
(insert string)
(decode-mime-charset-region (point-min)(point-max) charset lbt)
(buffer-string)))
(defvar charsets-mime-charset-alist
'(((ascii) . us-ascii)
((ascii latin-iso8859-1) . iso-8859-1)
((ascii latin-iso8859-2) . iso-8859-2)
((ascii latin-iso8859-3) . iso-8859-3)
((ascii latin-iso8859-4) . iso-8859-4)
((ascii cyrillic-iso8859-5) . iso-8859-5)
;;; ((ascii cyrillic-iso8859-5) . koi8-r)
((ascii arabic-iso8859-6) . iso-8859-6)
((ascii greek-iso8859-7) . iso-8859-7)
((ascii hebrew-iso8859-8) . iso-8859-8)
((ascii latin-iso8859-9) . iso-8859-9)
((ascii latin-jisx0201
japanese-jisx0208-1978 japanese-jisx0208) . iso-2022-jp)
((ascii latin-jisx0201
katakana-jisx0201 japanese-jisx0208) . shift_jis)
((ascii korean-ksc5601) . euc-kr)
((ascii chinese-gb2312) . gb2312)
((ascii chinese-big5-1 chinese-big5-2) . big5)
((ascii latin-iso8859-1 greek-iso8859-7
latin-jisx0201 japanese-jisx0208-1978
chinese-gb2312 japanese-jisx0208
korean-ksc5601 japanese-jisx0212) . iso-2022-jp-2)
((ascii latin-iso8859-1 greek-iso8859-7
latin-jisx0201 japanese-jisx0208-1978
chinese-gb2312 japanese-jisx0208
korean-ksc5601 japanese-jisx0212
chinese-cns11643-1 chinese-cns11643-2) . iso-2022-int-1)
))
(defun coding-system-to-mime-charset (coding-system)
"Convert CODING-SYSTEM to a MIME-charset.
Return nil if corresponding MIME-charset is not found."
(setq coding-system
(coding-system-name (coding-system-base coding-system)))
(or (car (rassq coding-system mime-charset-coding-system-alist))
coding-system))
(defun mime-charset-list ()
"Return a list of all existing MIME-charset."
(let ((dest (mapcar (function car) mime-charset-coding-system-alist))
(rest (coding-system-list))
cs)
(while rest
(setq cs (coding-system-name (coding-system-base (car rest))))
(or (rassq cs mime-charset-coding-system-alist)
(memq cs dest)
(setq dest (cons cs dest)))
(setq rest (cdr rest)))
dest))
;;; @ end
;;;
(provide 'mcs-xm)
;;; mcs-xm.el ends here