1 ;;; mcharset.el --- MIME charset API
3 ;; Copyright (C) 1997,1998,1999,2000 Free Software Foundation, Inc.
5 ;; Author: MORIOKA Tomohiko <tomo@m17n.org>
6 ;; Keywords: emulation, compatibility, Mule
8 ;; This file is part of APEL (A Portable Emacs Library).
10 ;; This program is free software; you can redistribute it and/or
11 ;; modify it under the terms of the GNU General Public License as
12 ;; published by the Free Software Foundation; either version 2, or (at
13 ;; your option) any later version.
15 ;; This program 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.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 ;; Boston, MA 02110-1301, USA.
30 (cond ((featurep 'mule)
31 (if (>= emacs-major-version 20)
33 ;; for MULE 1.* and 2.*
36 ;; for Nemacs and Nepoch
37 (require 'mcs-nemacs))
41 (defcustom default-mime-charset-for-write
42 (if (mime-charset-p 'utf-8)
45 "Default value of MIME-charset for encoding.
46 It may be used when suitable MIME-charset is not found.
51 (defcustom default-mime-charset-detect-method-for-write
53 "Function called when suitable MIME-charset is not found to encode.
54 It must be nil or function.
55 If it is nil, variable `default-mime-charset-for-write' is used.
56 If it is a function, interface must be (TYPE CHARSETS &rest ARGS).
57 CHARSETS is list of charset.
58 If TYPE is 'region, ARGS has START and END."
60 :type '(choice function (const nil)))
62 (defun charsets-to-mime-charset (charsets)
63 "Return MIME charset from list of charset CHARSETS.
64 Return nil if suitable mime-charset is not found."
67 (let ((rest charsets-mime-charset-alist)
69 (while (setq cell (car rest))
70 (if (catch 'not-subset
77 (throw 'not-subset nil))
78 (setq set1 (cdr set1)))
80 (throw 'tag (cdr cell)))
81 (setq rest (cdr rest)))
84 (defun find-mime-charset-by-charsets (charsets &optional mode &rest args)
85 "Like `charsets-to-mime-charset', but it does not return nil.
87 When suitable mime-charset is not found and variable
88 `default-mime-charset-detect-method-for-write' is not nil,
89 `find-mime-charset-by-charsets' calls the variable as function and
90 return the return value of the function.
91 Interface of the function is (MODE CHARSETS &rest ARGS).
93 When suitable mime-charset is not found and variable
94 `default-mime-charset-detect-method-for-write' is nil,
95 variable `default-mime-charset-for-write' is returned."
96 (or (charsets-to-mime-charset charsets)
97 (if default-mime-charset-detect-method-for-write
98 (apply default-mime-charset-detect-method-for-write
100 default-mime-charset-for-write)))
107 (product-provide (provide 'mcharset) (require 'apel-ver))
109 ;;; mcharset.el ends here