;;; mm-bodies.el --- Functions for decoding MIME things
-;; Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
+
+;; Copyright (C) 1998-2014 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; 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)
-;; any later version.
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; 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.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
+;; For Emacs <22.2 and XEmacs.
(eval-and-compile
- (or (fboundp 'base64-decode-region)
- (require 'base64))
- (autoload 'binhex-decode-region "binhex"))
+ (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
(require 'mm-util)
(require 'rfc2047)
-(require 'qp)
-(require 'uudecode)
+(require 'mm-encode)
+
+(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, CR, LF, TAB, BEL,
+;; 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))
(goto-char (point-min))
(if (re-search-forward "[^\x0-\x7f]" nil t)
(or mail-parse-charset
- (message-options-get 'mm-encody-body-charset)
- (message-options-set
- 'mm-encody-body-charset
- (mm-read-charset "Charset used in the article: ")))
+ (message-options-get 'mm-body-charset-encoding-alist)
+ (message-options-set
+ 'mm-body-charset-encoding-alist
+ (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) charset)
- (goto-char (point-max)))
- (setq start nil))
- (unless start
- (setq start (point))))
- (forward-char 1))
- (when start
- (mm-encode-coding-region start (point) 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 LENGTH."
+ (save-excursion
+ (goto-char (point-min))
+ (end-of-line)
+ (while (and (not (eobp))
+ (not (> (current-column) length)))
+ (forward-line 1)
+ (end-of-line))
+ (and (> (current-column) length)
+ (current-column))))
+
+(defvar message-posting-charset)
(defun mm-body-encoding (charset &optional encoding)
"Do Content-Transfer-Encoding and return the encoding of the current buffer."
- (let ((bits (mm-body-7-or-8)))
+ (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) (eq bits '7bit))
+ ((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)
projects / gnus / blobdiff