Re: detecting encoding for Japanese

[Katsumi Yamaoka <yamaoka@jpl.org>]

I'm sorry to bother you so many times.

>>>>> In <yotlofbfx217.fsf@jpl.org>
>>>>>	Katsumi Yamaoka <yamaoka@jpl.org> wrote:

> Maybe the following value is much better(?):

> (get-language-info current-language-environment 'coding-priority)

I noticed the form may not provide a good value.  If a user loads
the jisx0213 module which is included in the Mule-UCS package,
priority will be given to iso-2022-jp-3 or euc-jisx0213.
Probably it is not related to the system-type:

emacs-21.2 -batch -q -no-site-file

(load "jisx0213")
(set-language-environment "Japanese")
(get-language-info current-language-environment coding-priority)
 => (iso-2022-jp-3-compatible utf-8 utf-16-le utf-16-be
     euc-jisx0213 japanese-shift-jisx0213 iso-2022-jp-2)

(require 'mm-util)
(let ((default-enable-multibyte-characters t)
      (mm-coding-system-priorities nil))
  (with-temp-buffer
    (insert "あいうえお")
    (mm-find-mime-charset-region (point-min) (point-max))))
 => (euc-jisx0213)

After all, it is the best to adopt the way which you wrote.

(defcustom mm-coding-system-priorities
  (cond ((string-= current-language-environment "Japanese")
	 '(iso-2022-jp iso-2022-jp-2 japanese-shift-jis utf-8)))
  "Preferred coding systems for encoding outgoing mails....")
-- 
Katsumi Yamaoka <yamaoka@jpl.org>