;;; mm-bodies.el --- Functions for decoding MIME things
-;; Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
+
+;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+;; 2005, 2006, 2007 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; GNU Emacs 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)
+;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; 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.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Code:
+;; For Emacs < 22.2.
(eval-and-compile
- (or (fboundp 'base64-decode-region)
- (require 'base64)))
-
-(eval-when-compile
- (defvar mm-uu-decode-function)
- (defvar mm-uu-binhex-decode-function))
+ (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
(require 'mm-util)
(require 'rfc2047)
(require 'mm-encode)
-;; 8bit treatment gets any char except: 0x32 - 0x7f, CR, LF, TAB, BEL,
+(defvar mm-uu-yenc-decode-function)
+(defvar mm-uu-decode-function)
+(defvar mm-uu-binhex-decode-function)
+
+;; 8bit treatment gets any char except: 0x32 - 0x7f, LF, TAB, BEL,
;; BS, vertical TAB, form feed, and ^_
-(defvar mm-7bit-chars "\x20-\x7f\r\n\t\x7\x8\xb\xc\x1f")
+;;
+;; Note that CR is *not* included, as that would allow a non-paired CR
+;; in the body contrary to RFC 2822:
+;;
+;; - CR and LF MUST only occur together as CRLF; they MUST NOT
+;; appear independently in the body.
+
+(defvar mm-7bit-chars "\x20-\x7f\n\t\x7\x8\xb\xc\x1f")
(defcustom mm-body-charset-encoding-alist
'((iso-2022-jp . 7bit)
- (iso-2022-jp-2 . 7bit))
+ (iso-2022-jp-2 . 7bit)
+ ;; We MUST encode UTF-16 because it can contain \0's which is
+ ;; known to break servers.
+ ;; Note: UTF-16 variants are invalid for text parts [RFC 2781],
+ ;; so this can't happen :-/.
+ ;; PPS: Yes, it can happen if the user specifies UTF-16 in the MML
+ ;; markup. - jh.
+ (utf-16 . base64)
+ (utf-16be . base64)
+ (utf-16le . base64))
"Alist of MIME charsets to encodings.
Valid encodings are `7bit', `8bit', `quoted-printable' and `base64'."
:type '(repeat (cons (symbol :tag "charset")
(const base64))))
:group 'mime)
+(autoload 'message-options-get "message")
+(declare-function message-options-set "message" (symbol value))
+
(defun mm-encode-body (&optional charset)
"Encode a body.
Should be called narrowed to the body that is to be encoded.
-If there is more than one non-ASCII MULE charset, then list of found
-MULE charsets are returned.
-If CHARSET is non-nil, it is used.
+If there is more than one non-ASCII MULE charset in the body, then the
+list of MULE charsets found is returned.
+If CHARSET is non-nil, it is used as the MIME charset to encode the body.
If successful, the MIME charset is returned.
If no encoding was done, nil is returned."
(if (not (mm-multibyte-p))
(message-options-get 'mm-encody-body-charset)
(message-options-set
'mm-encody-body-charset
- (mm-read-charset "Charset used in the article: ")))
+ (mm-read-coding-system "Charset used in the article: ")))
;; The logic in `mml-generate-mime-1' confirms that it's OK
;; to return nil here.
nil)))
(save-excursion
(if charset
(progn
- (mm-encode-coding-region (point-min) (point-max) charset)
+ (mm-encode-coding-region (point-min) (point-max)
+ (mm-charset-to-coding-system charset))
charset)
(goto-char (point-min))
- (let ((charsets (mm-find-mime-charset-region (point-min) (point-max)))
- start)
+ (let ((charsets (mm-find-mime-charset-region (point-min) (point-max)
+ mm-hack-charsets)))
(cond
;; No encoding.
((null charsets)
charsets)
;; We encode.
(t
- (setq charset (car charsets))
- (while (not (eobp))
- (if (eq (mm-charset-after) 'ascii)
- (when start
- (save-restriction
- (narrow-to-region start (point))
- (mm-encode-coding-region
- start (point) (mm-charset-to-coding-system charset))
- (goto-char (point-max)))
- (setq start nil))
- (unless start
- (setq start (point))))
- (forward-char 1))
- (when start
- (mm-encode-coding-region start (point)
- (mm-charset-to-coding-system charset))
- (setq start nil))
- charset)))))))
+ (prog1
+ (setq charset (car charsets))
+ (mm-encode-coding-region (point-min) (point-max)
+ (mm-charset-to-coding-system charset))))
+ ))))))
(defun mm-long-lines-p (length)
- "Say whether any of the lines in the buffer is longer than LINES."
+ "Say whether any of the lines in the buffer is longer than LENGTH."
(save-excursion
(goto-char (point-min))
(end-of-line)
(defun mm-body-encoding (charset &optional encoding)
"Do Content-Transfer-Encoding and return the encoding of the current buffer."
+ (when (stringp encoding)
+ (setq encoding (intern (downcase encoding))))
(let ((bits (mm-body-7-or-8))
(longp (mm-long-lines-p 1000)))
(require 'message)
(cond
- ((and (not mm-use-ultra-safe-encoding)
- (not longp)
+ ((and (not longp)
+ (not (and mm-use-ultra-safe-encoding
+ (or (save-excursion (re-search-forward " $" nil t))
+ (save-excursion (re-search-forward "^From " nil t)))))
(eq bits '7bit))
bits)
((and (not mm-use-ultra-safe-encoding)
(not longp)
+ (not (cdr (assq charset mm-body-charset-encoding-alist)))
(or (eq t (cdr message-posting-charset))
(memq charset (cdr message-posting-charset))
(eq charset mail-parse-charset)))
(defun mm-body-7-or-8 ()
"Say whether the body is 7bit or 8bit."
- (cond
- ((not (featurep 'mule))
- (if (save-excursion
- (goto-char (point-min))
- (skip-chars-forward mm-7bit-chars)
- (eobp))
- '7bit
- '8bit))
- (t
- ;; Mule version
- (if (and (null (delq 'ascii
- (mm-find-charset-region (point-min) (point-max))))
- ;;!!!The following is necessary because the function
- ;;!!!above seems to return the wrong result under
- ;;!!!Emacs 20.3. Sometimes.
- (save-excursion
- (goto-char (point-min))
- (skip-chars-forward mm-7bit-chars)
- (eobp)))
- '7bit
- '8bit))))
+ (if (save-excursion
+ (goto-char (point-min))
+ (skip-chars-forward mm-7bit-chars)
+ (eobp))
+ '7bit
+ '8bit))
;;;
;;; Functions for decoding
;;;
(defun mm-decode-content-transfer-encoding (encoding &optional type)
+ "Decodes buffer encoded with ENCODING, returning success status.
+If TYPE is `text/plain' CRLF->LF translation may occur."
(prog1
(condition-case error
(cond
((eq encoding 'quoted-printable)
- (quoted-printable-decode-region (point-min) (point-max)))
+ (quoted-printable-decode-region (point-min) (point-max))
+ t)
((eq encoding 'base64)
(base64-decode-region
(point-min)
(point))))
((memq encoding '(7bit 8bit binary))
;; Do nothing.
- )
+ t)
((null encoding)
;; Do nothing.
- )
+ t)
((memq encoding '(x-uuencode x-uue))
(require 'mm-uu)
- (funcall mm-uu-decode-function (point-min) (point-max)))
+ (funcall mm-uu-decode-function (point-min) (point-max))
+ t)
((eq encoding 'x-binhex)
(require 'mm-uu)
- (funcall mm-uu-binhex-decode-function (point-min) (point-max)))
+ (funcall mm-uu-binhex-decode-function (point-min) (point-max))
+ t)
+ ((eq encoding 'x-yenc)
+ (require 'mm-uu)
+ (funcall mm-uu-yenc-decode-function (point-min) (point-max))
+ )
((functionp encoding)
- (funcall encoding (point-min) (point-max)))
+ (funcall encoding (point-min) (point-max))
+ t)
(t
(message "Unknown encoding %s; defaulting to 8bit" encoding)))
(error
(message "Error while decoding: %s" error)
nil))
(when (and
- (memq encoding '(base64 x-uuencode x-uue x-binhex))
- (equal type "text/plain"))
+ type
+ (memq encoding '(base64 x-uuencode x-uue x-binhex x-yenc))
+ (string-match "\\`text/" type))
(goto-char (point-min))
(while (search-forward "\r\n" nil t)
(replace-match "\n" t t)))))
(defun mm-decode-body (charset &optional encoding type)
- "Decode the current article that has been encoded with ENCODING.
-The characters in CHARSET should then be decoded."
- (if (stringp charset)
- (setq charset (intern (downcase charset))))
- (if (or (not charset)
- (eq 'gnus-all mail-parse-ignored-charsets)
- (memq 'gnus-all mail-parse-ignored-charsets)
- (memq charset mail-parse-ignored-charsets))
- (setq charset mail-parse-charset))
+ "Decode the current article that has been encoded with ENCODING to CHARSET.
+ENCODING is a MIME content transfer encoding.
+CHARSET is the MIME charset with which to decode the data after transfer
+decoding. If it is nil, default to `mail-parse-charset'."
+ (when (stringp charset)
+ (setq charset (intern (downcase charset))))
+ (when (or (not charset)
+ (eq 'gnus-all mail-parse-ignored-charsets)
+ (memq 'gnus-all mail-parse-ignored-charsets)
+ (memq charset mail-parse-ignored-charsets))
+ (setq charset mail-parse-charset))
(save-excursion
(when encoding
(mm-decode-content-transfer-encoding encoding type))
- (when (featurep 'mule)
- (let ((coding-system (mm-charset-to-coding-system charset)))
+ (when (and (featurep 'mule) ;; Fixme: Wrong test for unibyte session.
+ (not (eq charset 'gnus-decoded)))
+ (let ((coding-system (mm-charset-to-coding-system
+ ;; Allow overwrite using
+ ;; `mm-charset-override-alist'.
+ charset nil t)))
(if (and (not coding-system)
(listp mail-parse-ignored-charsets)
(memq 'gnus-unknown mail-parse-ignored-charsets))
;;in XEmacs
(mm-multibyte-p)
(or (not (eq coding-system 'ascii))
- (setq coding-system mail-parse-charset))
- (not (eq coding-system 'gnus-decoded)))
- (mm-decode-coding-region (point-min) (point-max) coding-system))))))
+ (setq coding-system mail-parse-charset)))
+ (mm-decode-coding-region (point-min) (point-max)
+ coding-system))
+ (setq buffer-file-coding-system
+ (if (boundp 'last-coding-system-used)
+ (symbol-value 'last-coding-system-used)
+ coding-system))))))
(defun mm-decode-string (string charset)
"Decode STRING with CHARSET."
(setq charset mail-parse-charset))
(or
(when (featurep 'mule)
- (let ((coding-system (mm-charset-to-coding-system charset)))
+ (let ((coding-system (mm-charset-to-coding-system
+ charset
+ ;; Allow overwrite using
+ ;; `mm-charset-override-alist'.
+ nil t)))
(if (and (not coding-system)
(listp mail-parse-ignored-charsets)
(memq 'gnus-unknown mail-parse-ignored-charsets))
(provide 'mm-bodies)
+;;; arch-tag: 41104bb6-4443-4ca9-8d5c-ff87ecf27d8d
;;; mm-bodies.el ends here
projects / gnus / blobdiff