-;;; mm-encode.el --- Functions for encoding MIME things
-;; Copyright (C) 1998 Free Software Foundation, Inc.
+;;; mm-encode.el --- Functions for encoding MIME things
+;; Copyright (C) 1998,99 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
(require 'mailcap)
(defvar mm-content-transfer-encoding-defaults
- '(("text/.*" quoted-printable)
+ '(("text/x-patch" 8bit)
+ ("text/.*" qp-or-base64)
+ ("message/rfc822" 8bit)
("application/emacs-lisp" 8bit)
- (".*" base64))
- "Alist of regexps that match MIME types and their encodings.")
+ ("application/x-patch" 8bit)
+ (".*" qp-or-base64))
+ "Alist of regexps that match MIME types and their encodings.
+If the encoding is `qp-or-base64', then either quoted-printable
+or base64 will be used, depending on what is more efficient.")
(defun mm-insert-rfc822-headers (charset encoding)
"Insert text/plain headers with CHARSET and ENCODING."
(defun mm-encode-content-transfer-encoding (encoding &optional type)
(cond
((eq encoding 'quoted-printable)
- (quoted-printable-encode-region (point-min) (point-max)))
+ (quoted-printable-encode-region (point-min) (point-max) t))
((eq encoding 'base64)
(when (equal type "text/plain")
(goto-char (point-min))
(while (search-forward "\n" nil t)
(replace-match "\r\n" t t)))
- (condition-case ()
+ (condition-case error
(base64-encode-region (point-min) (point-max))
- (error nil)))
+ (error
+ (message "Error while decoding: %s" error)
+ nil)))
((memq encoding '(7bit 8bit binary))
)
((null encoding)
)
- ;;((eq encoding 'x-uuencode)
- ;; (condition-case ()
- ;; (uudecode-encode-region (point-min) (point-max))
- ;; (error nil)))
((functionp encoding)
- (condition-case ()
- (funcall encoding (point-min) (point-max))
- (error nil)))
+ (ignore-errors (funcall encoding (point-min) (point-max))))
(t
(message "Unknown encoding %s; defaulting to 8bit" encoding))))
(encoding
(or (and (listp type)
(cadr (assq 'encoding type)))
- (mm-content-transfer-encoding mime-type))))
+ (mm-content-transfer-encoding mime-type)))
+ (bits (mm-body-7-or-8)))
+ ;; We force buffers that are 7bit to be unencoded, no matter
+ ;; what the preferred encoding is.
+ (when (eq bits '7bit)
+ (setq encoding bits))
(mm-encode-content-transfer-encoding encoding mime-type)
encoding))
(insert "\n"))
(defun mm-content-transfer-encoding (type)
- "Return a CTE suitable for TYPE."
+ "Return a CTE suitable for TYPE to encode the current buffer."
(let ((rules mm-content-transfer-encoding-defaults))
(catch 'found
(while rules
(when (string-match (caar rules) type)
- (throw 'found (cadar rules)))
+ (throw 'found
+ (if (eq (cadar rules) 'qp-or-base64)
+ (mm-qp-or-base64)
+ (cadar rules))))
(pop rules)))))
+(defun mm-qp-or-base64 ()
+ (save-excursion
+ (let ((limit (min (point-max) (+ 2000 (point-min))))
+ (n8bit 0))
+ (goto-char (point-min))
+ (skip-chars-forward "\x20-\x7f\r\n\t" limit)
+ (while (< (point) limit)
+ (incf n8bit)
+ (forward-char 1)
+ (skip-chars-forward "\x20-\x7f\r\n\t" limit))
+ (if (< (* 6 n8bit) (- limit (point-min)))
+ 'quoted-printable
+ 'base64))))
+
(provide 'mm-encode)
;;; mm-encode.el ends here