;;; mm-util.el --- Utility functions for MIME things
-;; Copyright (C) 1998 Free Software Foundation, Inc.
+;; Copyright (C) 1998,99 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
(defvar mm-running-xemacs (string-match "XEmacs" emacs-version))
-(defvar mm-running-ntemacs
- (and (not mm-running-xemacs)
+(defvar mm-running-ntemacs
+ (and (not mm-running-xemacs)
(string-match "nt" system-configuration)))
-(defvar mm-binary-coding-system
+(defvar mm-binary-coding-system
(if mm-running-xemacs
'binary 'no-conversion)
- "100% binary coding system.")
+ "100% binary coding system.")
-(defvar mm-text-coding-system
- (cond
+(defvar mm-text-coding-system
+ (cond
((not (fboundp 'coding-system-p)) nil)
(mm-running-xemacs ;; XEmacs
- (and (coding-system-p 'no-conversion) 'no-conversion))
+ 'no-conversion)
(mm-running-ntemacs ;; NTEmacs
(and (coding-system-p 'raw-text-dos) 'raw-text-dos))
((coding-system-p 'raw-text) 'raw-text) ;; Emacs
(t nil))
"100% text coding system, for removing ^M.")
-(defvar mm-default-coding-system nil
- "The default coding system to use.")
-
-(defvar mm-known-charsets '(iso-8859-1)
- "List of known charsets.
-Use this under non-Mule Emacsen to specify which charsets your Emacs
-can display. Also see `mm-default-charset'.")
-
-(defvar mm-default-charset 'iso-8859-1
- "Default charset assumed to be used when viewing non-ASCII characters.
-This variable is used only in non-Mule Emacsen.")
-
(defvar mm-mime-mule-charset-alist
'((us-ascii ascii)
(iso-8859-1 latin-iso8859-1)
(or mm-coding-system-list
(setq mm-coding-system-list (mm-coding-system-list))))
-(defvar mm-charset-coding-system-alist
- (let ((rest
- '((gb2312 . cn-gb-2312)
- (iso-2022-jp-2 . iso-2022-7bit-ss2)
- (x-ctext . ctext)))
- (systems (mm-get-coding-system-list))
- dest)
- (while rest
- (let ((pair (car rest)))
- (unless (memq (car pair) systems)
- (setq dest (cons pair dest))))
- (setq rest (cdr rest)))
- dest)
- "Charset/coding system alist.")
+(defvar mm-charset-synonym-alist
+ '((big5 . cn-big5)
+ (gb2312 . cn-gb-2312)
+ (iso-2022-jp-2 . iso-2022-7bit-ss2)
+ (x-ctext . ctext))
+ "A mapping from invalid charset names to the real charset names.")
+
+;;; Internal variables:
-;;;Internal variable
-(defvar mm-charset-iso-8859-1-forced nil)
+;;; Functions:
(defun mm-mule-charset-to-mime-charset (charset)
"Return the MIME charset corresponding to MULE CHARSET."
used as the line break code type of the coding system."
(when (stringp charset)
(setq charset (intern (downcase charset))))
- (if (and mm-charset-iso-8859-1-forced
- (eq charset 'iso-8859-1))
- (setq charset mm-charset-iso-8859-1-forced))
(setq charset
- (or (cdr (assq charset mm-charset-coding-system-alist))
+ (or (cdr (assq charset mm-charset-synonym-alist))
charset))
(when lbt
(setq charset (intern (format "%s-%s" charset lbt))))
(cond
;; Running in a non-MULE environment.
- ((and (null (mm-get-coding-system-list))
- (or (eq charset mm-default-charset)
- (memq charset mm-known-charsets)))
+ ((null (mm-get-coding-system-list))
charset)
;; ascii
((eq charset 'us-ascii)
(when (fboundp 'set-buffer-multibyte)
(set-buffer-multibyte nil)))
-(defun mm-mime-charset (charset b e)
+(defun mm-mime-charset (charset)
+ "Return the MIME charset corresponding to the MULE CHARSET."
(if (fboundp 'coding-system-get)
+ ;; This exists in Emacs 20.
(or
- (and
- mm-default-coding-system
- (let ((safe (coding-system-get mm-default-coding-system
- 'safe-charsets)))
- (or (eq safe t) (memq charset safe)))
- (coding-system-get mm-default-coding-system 'mime-charset))
- (coding-system-get
- (get-charset-property charset 'prefered-coding-system)
- 'mime-charset)
- (car (memq charset (find-coding-systems-region
- (point-min) (point-max)))))
+ (and (get-charset-property charset 'prefered-coding-system)
+ (coding-system-get
+ (get-charset-property charset 'prefered-coding-system)
+ 'mime-charset))
+ (and (eq charset 'ascii)
+ 'us-ascii)
+ (get-charset-property charset 'prefered-coding-system))
+ ;; This is for XEmacs.
(mm-mule-charset-to-mime-charset charset)))
(defsubst mm-multibyte-p ()
(skip-chars-forward "\0-\177")
(if (eobp)
'(ascii)
- ;;;!!!bogus
- (list 'ascii 'latin-iso8859-1)))))
+ (delq nil (list 'ascii mail-parse-charset))))))
(t
;; We are in a unibyte buffer, so we futz around a bit.
(save-excursion
'(ascii)
(list 'ascii (car (last (assq 'charset entry)))))))))))
+(defun mm-read-charset (prompt)
+ "Return a charset."
+ (intern
+ (completing-read
+ prompt
+ (mapcar (lambda (e) (list (symbol-name (car e))))
+ mm-mime-mule-charset-alist)
+ nil t)))
+
(provide 'mm-util)
;;; mm-util.el ends here