1 ;;; mml.el --- A package for parsing and validating MML documents
3 ;; Copyright (C) 1998-2016 Free Software Foundation, Inc.
5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
6 ;; This file is part of GNU Emacs.
8 ;; GNU Emacs is free software: you can redistribute it and/or modify
9 ;; it under the terms of the GNU General Public License as published by
10 ;; the Free Software Foundation, either version 3 of the License, or
11 ;; (at your option) any later version.
13 ;; GNU Emacs is distributed in the hope that it will be useful,
14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ;; GNU General Public License for more details.
18 ;; You should have received a copy of the GNU General Public License
19 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
30 (eval-when-compile (require 'cl))
31 (eval-when-compile (require 'url))
33 (autoload 'message-make-message-id "message")
34 (declare-function gnus-setup-posting-charset "gnus-msg" (group))
35 (autoload 'gnus-completing-read "gnus-util")
36 (autoload 'message-fetch-field "message")
37 (autoload 'message-mark-active-p "message")
38 (autoload 'message-info "message")
39 (autoload 'fill-flowed-encode "flow-fill")
40 (autoload 'message-posting-charset "message")
41 (autoload 'dnd-get-local-file-name "dnd")
43 (autoload 'message-options-set "message")
44 (autoload 'message-narrow-to-head "message")
45 (autoload 'message-in-body-p "message")
46 (autoload 'message-mail-p "message")
48 (defvar gnus-article-mime-handles)
49 (defvar gnus-newsrc-hashtb)
50 (defvar message-default-charset)
51 (defvar message-deletable-headers)
52 (defvar message-options)
53 (defvar message-posting-charset)
54 (defvar message-required-mail-headers)
55 (defvar message-required-news-headers)
56 (defvar dnd-protocol-alist)
57 (defvar mml-dnd-protocol-alist)
59 (defcustom mml-content-type-parameters
60 '(name access-type expiration size permission format)
61 "A list of acceptable parameters in MML tag.
62 These parameters are generated in Content-Type header if exists."
64 :type '(repeat (symbol :tag "Parameter"))
67 (defcustom mml-content-disposition-parameters
68 '(filename creation-date modification-date read-date)
69 "A list of acceptable parameters in MML tag.
70 These parameters are generated in Content-Disposition header if exists."
72 :type '(repeat (symbol :tag "Parameter"))
75 (defcustom mml-content-disposition-alist
76 '((text (rtf . "attachment") (t . "inline"))
78 "Alist of MIME types or regexps matching file names and default dispositions.
79 Each element should be one of the following three forms:
81 (REGEXP . DISPOSITION)
82 (SUPERTYPE (SUBTYPE . DISPOSITION) (SUBTYPE . DISPOSITION)...)
85 Where REGEXP is a string which matches the file name (if any) of an
86 attachment, SUPERTYPE, SUBTYPE and TYPE should be symbols which are a
87 MIME supertype (e.g., text), a MIME subtype (e.g., plain) and a MIME
88 type (e.g., text/plain) respectively, and DISPOSITION should be either
89 the string \"attachment\" or the string \"inline\". The value t for
90 SUPERTYPE, SUBTYPE or TYPE matches any of those types. The first
91 match found will be used."
92 :version "23.1" ;; No Gnus
93 :type (let ((dispositions '(radio :format "DISPOSITION: %v"
95 (const :format "%v " "attachment")
96 (const :format "%v\n" "inline"))))
99 (choice :format "%[Value Menu%]%v"
100 (cons :tag "(REGEXP . DISPOSITION)" :extra-offset 4
101 (regexp :tag "REGEXP" :value ".*")
103 (cons :tag "(SUPERTYPE (SUBTYPE . DISPOSITION)...)"
105 (symbol :tag " SUPERTYPE" :value text)
106 (repeat :format "%v%i\n" :offset 0 :extra-offset 4
107 (cons :format "%v" :extra-offset 5
108 (symbol :tag "SUBTYPE" :value t)
110 (cons :tag "(TYPE . DISPOSITION)" :extra-offset 4
111 (symbol :tag "TYPE" :value t)
115 (defcustom mml-insert-mime-headers-always t
116 "If non-nil, always put Content-Type: text/plain at top of empty parts.
117 It is necessary to work against a bug in certain clients."
122 (defcustom mml-enable-flowed t
123 "If non-nil, enable format=flowed usage when encoding a message.
124 This is only performed when filling on text/plain with hard
125 newlines in the text."
130 (defvar mml-tweak-type-alist nil
131 "A list of (TYPE . FUNCTION) for tweaking MML parts.
132 TYPE is a string containing a regexp to match the MIME type. FUNCTION
133 is a Lisp function which is called with the MML handle to tweak the
134 part. This variable is used only when no TWEAK parameter exists in
137 (defvar mml-tweak-function-alist nil
138 "A list of (NAME . FUNCTION) for tweaking MML parts.
139 NAME is a string containing the name of the TWEAK parameter in the MML
140 handle. FUNCTION is a Lisp function which is called with the MML
141 handle to tweak the part.")
143 (defvar mml-tweak-sexp-alist
144 '((mml-externalize-attachments . mml-tweak-externalize-attachments))
145 "A list of (SEXP . FUNCTION) for tweaking MML parts.
146 SEXP is an s-expression. If the evaluation of SEXP is non-nil, FUNCTION
147 is called. FUNCTION is a Lisp function which is called with the MML
148 handle to tweak the part.")
150 (defvar mml-externalize-attachments nil
151 "If non-nil, local-file attachments are generated as external parts.")
153 (defcustom mml-generate-multipart-alist nil
154 "Alist of multipart generation functions.
155 Each entry has the form (NAME . FUNCTION), where
156 NAME is a string containing the name of the part (without the
157 leading \"/multipart/\"),
158 FUNCTION is a Lisp function which is called to generate the part.
160 The Lisp function has to supply the appropriate MIME headers and the
161 contents of this part."
163 :type '(alist :key-type string :value-type function))
165 (defvar mml-syntax-table
166 (let ((table (copy-syntax-table emacs-lisp-mode-syntax-table)))
167 (modify-syntax-entry ?\\ "/" table)
168 (modify-syntax-entry ?< "(" table)
169 (modify-syntax-entry ?> ")" table)
170 (modify-syntax-entry ?@ "w" table)
171 (modify-syntax-entry ?/ "w" table)
172 (modify-syntax-entry ?= " " table)
173 (modify-syntax-entry ?* " " table)
174 (modify-syntax-entry ?\; " " table)
175 (modify-syntax-entry ?\' " " table)
178 (defvar mml-boundary-function 'mml-make-boundary
179 "A function called to suggest a boundary.
180 The function may be called several times, and should try to make a new
181 suggestion each time. The function is called with one parameter,
182 which is a number that says how many times the function has been
183 called for this message.")
185 (defvar mml-confirmation-set nil
186 "A list of symbols, each of which disables some warning.
187 `unknown-encoding': always send messages contain characters with
188 unknown encoding; `use-ascii': always use ASCII for those characters
189 with unknown encoding; `multipart': always send messages with more than
192 (defvar mml-generate-default-type "text/plain"
193 "Content type by which the Content-Type header can be omitted.
194 The Content-Type header will not be put in the MIME part if the type
195 equals the value and there's no parameter (e.g. charset, format, etc.)
196 and `mml-insert-mime-headers-always' is nil. The value will be bound
197 to \"message/rfc822\" when encoding an article to be forwarded as a MIME
198 part. This is for the internal use, you should never modify the value.")
200 (defvar mml-buffer-list nil)
202 (defun mml-generate-new-buffer (name)
203 (let ((buf (generate-new-buffer name)))
204 (push buf mml-buffer-list)
207 (defun mml-destroy-buffers ()
208 (let (kill-buffer-hook)
209 (mapc 'kill-buffer mml-buffer-list)
210 (setq mml-buffer-list nil)))
213 "Parse the current buffer as an MML document."
215 (goto-char (point-min))
216 (with-syntax-table mml-syntax-table
219 (defun mml-parse-1 ()
220 "Parse the current buffer as an MML document."
221 (let (struct tag point contents charsets warn use-ascii no-markup-p raw)
222 (while (and (not (eobp))
223 (not (looking-at "<#/multipart")))
225 ((looking-at "<#secure")
226 ;; The secure part is essentially a meta-meta tag, which
227 ;; expands to either a part tag if there are no other parts in
228 ;; the document or a multipart tag if there are other parts
229 ;; included in the message
231 (taginfo (mml-read-tag))
232 (keyfile (cdr (assq 'keyfile taginfo)))
233 (certfiles (delq nil (mapcar (lambda (tag)
234 (if (eq (car-safe tag) 'certfile)
237 (recipients (cdr (assq 'recipients taginfo)))
238 (sender (cdr (assq 'sender taginfo)))
239 (location (cdr (assq 'tag-location taginfo)))
240 (mode (cdr (assq 'mode taginfo)))
241 (method (cdr (assq 'method taginfo)))
244 (if (re-search-forward
245 "<#/?\\(multipart\\|part\\|external\\|mml\\)." nil t)
246 (setq secure-mode "multipart")
247 (setq secure-mode "part")))
250 (re-search-forward "<#secure[^\n]*>\n"))
251 (delete-region (match-beginning 0) (match-end 0))
252 (cond ((string= mode "sign")
253 (setq tags (list "sign" method)))
254 ((string= mode "encrypt")
255 (setq tags (list "encrypt" method)))
256 ((string= mode "signencrypt")
257 (setq tags (list "sign" method "encrypt" method)))
259 (error "Unknown secure mode %s" mode)))
260 (eval `(mml-insert-tag ,secure-mode
262 ,(if keyfile "keyfile")
265 (mapcar (lambda (certfile)
266 (list "certfile" certfile))
268 ,(if recipients "recipients")
270 ,(if sender "sender")
273 (goto-char location)))
274 ((looking-at "<#multipart")
275 (push (nconc (mml-read-tag) (mml-parse-1)) struct))
276 ((looking-at "<#external")
277 (push (nconc (mml-read-tag) (list (cons 'contents (mml-read-part))))
280 (if (or (looking-at "<#part") (looking-at "<#mml"))
281 (setq tag (mml-read-tag)
284 (setq tag (list 'part '(type . "text/plain"))
287 (setq raw (cdr (assq 'raw tag))
289 contents (mml-read-part (eq 'mml (car tag)))
294 (intern (downcase (cdr (assq 'charset tag))))))
296 (mm-find-mime-charset-region point (point)
298 (when (and (not raw) (memq nil charsets))
299 (if (or (memq 'unknown-encoding mml-confirmation-set)
300 (message-options-get 'unknown-encoding)
302 Message contains characters with unknown encoding. Really send? ")
303 (message-options-set 'unknown-encoding t)))
305 (or (memq 'use-ascii mml-confirmation-set)
306 (message-options-get 'use-ascii)
307 (and (y-or-n-p "Use ASCII as charset? ")
308 (message-options-set 'use-ascii t))))
309 (setq charsets (delq nil charsets))
311 (error "Edit your message to remove those characters")))
314 (< (length charsets) 2))
315 (if (or (not no-markup-p)
316 (string-match "[^ \t\r\n]" contents))
317 ;; Don't create blank parts.
318 (push (nconc tag (list (cons 'contents contents)))
320 (let ((nstruct (mml-parse-singlepart-with-multiple-charsets
321 tag point (point) use-ascii)))
323 (not (memq 'multipart mml-confirmation-set))
324 (not (message-options-get 'multipart))
325 (not (and (y-or-n-p (format "\
326 A message part needs to be split into %d charset parts. Really send? "
328 (message-options-set 'multipart t))))
329 (error "Edit your message to use only one charset"))
330 (setq struct (nconc nstruct struct)))))))
335 (defun mml-parse-singlepart-with-multiple-charsets
336 (orig-tag beg end &optional use-ascii)
339 (narrow-to-region beg end)
340 (goto-char (point-min))
341 (let ((current (or (mm-mime-charset (mm-charset-after))
342 (and use-ascii 'us-ascii)))
343 charset struct space newline paragraph)
345 (setq charset (mm-mime-charset (mm-charset-after)))
347 ;; The charset remains the same.
348 ((eq charset 'us-ascii))
349 ((or (and use-ascii (not charset))
350 (eq charset current))
354 ;; The initial charset was ascii.
355 ((eq current 'us-ascii)
356 (setq current charset
360 ;; We have a change in charsets.
364 (list (cons 'contents
365 (buffer-substring-no-properties
366 beg (or paragraph newline space (point))))))
368 (setq beg (or paragraph newline space (point))
373 ;; Compute places where it might be nice to break the part.
375 ((memq (following-char) '(? ?\t))
376 (setq space (1+ (point))))
377 ((and (eq (following-char) ?\n)
379 (eq (char-after (1- (point))) ?\n))
380 (setq paragraph (point)))
381 ((eq (following-char) ?\n)
382 (setq newline (1+ (point)))))
384 ;; Do the final part.
385 (unless (= beg (point))
386 (push (append orig-tag
387 (list (cons 'contents
388 (buffer-substring-no-properties
393 (defun mml-read-tag ()
394 "Read a tag and return the contents."
395 (let ((orig-point (point))
396 contents name elem val)
398 (setq name (buffer-substring-no-properties
399 (point) (progn (forward-sexp 1) (point))))
400 (skip-chars-forward " \t\n")
401 (while (not (looking-at ">[ \t]*\n?"))
402 (setq elem (buffer-substring-no-properties
403 (point) (progn (forward-sexp 1) (point))))
404 (skip-chars-forward "= \t\n")
405 (setq val (buffer-substring-no-properties
406 (point) (progn (forward-sexp 1) (point))))
407 (when (string-match "\\`\"" val)
408 (setq val (read val))) ;; inverse of prin1 in mml-insert-tag
409 (push (cons (intern elem) val) contents)
410 (skip-chars-forward " \t\n"))
411 (goto-char (match-end 0))
412 ;; Don't skip the leading space.
413 ;;(skip-chars-forward " \t\n")
414 ;; Put the tag location into the returned contents
415 (setq contents (append (list (cons 'tag-location orig-point)) contents))
416 (cons (intern name) (nreverse contents))))
418 (defun mml-buffer-substring-no-properties-except-some (start end)
419 (let ((str (buffer-substring-no-properties start end))
422 ;; Copy over all hard newlines.
423 (while (setq tmp (text-property-any start end 'hard t))
424 (put-text-property (- tmp bufstart) (- tmp bufstart -1)
426 (setq start (1+ tmp)))
427 ;; Copy over all `display' properties (which are usually images).
428 (setq start bufstart)
429 (while (setq tmp (text-property-not-all start end 'display nil))
430 (put-text-property (- tmp bufstart) (- tmp bufstart -1)
431 'display (get-text-property tmp 'display)
433 (setq start (1+ tmp)))
436 (defun mml-read-part (&optional mml)
437 "Return the buffer up till the next part, multipart or closing part or multipart.
438 If MML is non-nil, return the buffer up till the correspondent mml tag."
439 (let ((beg (point)) (count 1))
440 ;; If the tag ended at the end of the line, we go to the next line.
441 (when (looking-at "[ \t]*\n")
445 (while (and (> count 0) (not (eobp)))
446 (if (re-search-forward "<#\\(/\\)?mml." nil t)
447 (setq count (+ count (if (match-beginning 1) -1 1)))
448 (goto-char (point-max))))
449 (mml-buffer-substring-no-properties-except-some
452 (match-beginning 0))))
453 (if (re-search-forward
454 "<#\\(/\\)?\\(multipart\\|part\\|external\\|mml\\)." nil t)
456 (mml-buffer-substring-no-properties-except-some
457 beg (match-beginning 0))
458 (if (or (not (match-beginning 1))
459 (equal (match-string 2) "multipart"))
460 (goto-char (match-beginning 0))
461 (when (looking-at "[ \t]*\n")
463 (mml-buffer-substring-no-properties-except-some
464 beg (goto-char (point-max)))))))
466 (defvar mml-boundary nil)
467 (defvar mml-base-boundary "-=-=")
468 (defvar mml-multipart-number 0)
469 (defvar mml-inhibit-compute-boundary nil)
471 (declare-function libxml-parse-html-region "xml.c"
472 (start end &optional base-url discard-comments))
474 (defun mml-generate-mime (&optional multipart-type)
475 "Generate a MIME message based on the current MML document.
476 MULTIPART-TYPE defaults to \"mixed\", but can also
477 be \"related\" or \"alternate\"."
478 (let ((cont (mml-parse))
479 (mml-multipart-number mml-multipart-number)
480 (options message-options))
483 (when (and (consp (car cont))
485 (fboundp 'libxml-parse-html-region)
486 (equal (cdr (assq 'type (car cont))) "text/html"))
487 (setq cont (mml-expand-html-into-multipart-related (car cont))))
489 (mm-with-multibyte-buffer
490 (setq message-options options)
492 ((and (consp (car cont))
494 (mml-generate-mime-1 (car cont)))
495 ((eq (car cont) 'multipart)
496 (mml-generate-mime-1 cont))
499 (nconc (list 'multipart (cons 'type (or multipart-type "mixed")))
501 (setq options message-options)
503 (setq message-options options)))))
505 (defun mml-expand-html-into-multipart-related (cont)
506 (let ((new-parts nil)
508 (mm-with-multibyte-buffer
509 (insert (cdr (assq 'contents cont)))
510 (goto-char (point-min))
511 (with-syntax-table mml-syntax-table
512 (while (re-search-forward "<img\\b" nil t)
513 (goto-char (match-beginning 0))
514 (let* ((start (point))
517 (libxml-parse-html-region
518 (point) (progn (forward-sexp) (point))))))
520 (parsed (url-generic-parse-url (cdr (assq 'src (cadr img))))))
521 (when (and (null (url-type parsed))
522 (url-filename parsed)
523 (file-exists-p (url-filename parsed)))
525 (when (search-forward (url-filename parsed) end t)
526 (let ((cid (format "fsf.%d" cid)))
527 (replace-match (concat "cid:" cid) t t)
528 (push (list cid (url-filename parsed)
529 (get-text-property start 'display))
531 (setq cid (1+ cid)))))))
532 ;; We have local images that we want to include.
535 (setcdr (assq 'contents cont) (buffer-string))
537 (nconc (list 'multipart (cons 'type "related"))
539 (dolist (new-part (nreverse new-parts))
542 (list `(part (type . "image/png")
543 ,@(mml--possibly-alter-image
546 (id . ,(concat "<" (nth 0 new-part)
550 (defun mml--possibly-alter-image (file-name image)
553 (not (eq (car image) 'image))
554 (not (image-property image :rotation))
555 (not (executable-find "exiftool")))
556 `((filename . ,file-name))
557 `((filename . ,file-name)
560 ,(with-current-buffer (mml-generate-new-buffer " *mml rotation*")
561 (set-buffer-multibyte nil)
562 (call-process "exiftool"
564 (list (current-buffer) nil)
566 (format "-Orientation#=%d"
568 (image-property image :rotation))
576 (current-buffer))))))
578 (defun mml-generate-mime-1 (cont)
579 (let ((mm-use-ultra-safe-encoding
580 (or mm-use-ultra-safe-encoding (assq 'sign cont))))
582 (narrow-to-region (point) (point))
583 (mml-tweak-part cont)
585 ((or (eq (car cont) 'part) (eq (car cont) 'mml))
586 (let* ((raw (cdr (assq 'raw cont)))
587 (filename (cdr (assq 'filename cont)))
588 (type (or (cdr (assq 'type cont))
590 (or (mm-default-file-encoding filename)
591 "application/octet-stream")
593 (charset (cdr (assq 'charset cont)))
594 (coding (mm-charset-to-coding-system charset))
595 encoding flowed coded)
596 (cond ((eq coding 'ascii)
600 ;; The value of `charset' might be a bogus alias that
601 ;; `mm-charset-synonym-alist' provides, like `utf8',
602 ;; so we prefer the MIME charset that Emacs knows for
603 ;; the coding system `coding'.
604 (setq charset (or (mm-coding-system-to-mime-charset coding)
605 (intern (downcase charset))))))
607 (member (car (split-string type "/")) '("text" "message")))
611 ((cdr (assq 'buffer cont))
612 (insert-buffer-substring (cdr (assq 'buffer cont))))
614 (not (equal (cdr (assq 'nofile cont)) "yes")))
615 (let ((coding-system-for-read coding))
616 (mm-insert-file-contents filename)))
617 ((eq 'mml (car cont))
618 (insert (cdr (assq 'contents cont))))
621 (narrow-to-region (point) (point))
622 (insert (cdr (assq 'contents cont)))
623 ;; Remove quotes from quoted tags.
624 (goto-char (point-min))
625 (while (re-search-forward
626 "<#!+/?\\(part\\|multipart\\|external\\|mml\\|secure\\)"
628 (delete-region (+ (match-beginning 0) 2)
629 (+ (match-beginning 0) 3))))))
631 ((eq (car cont) 'mml)
632 (let ((mml-boundary (mml-compute-boundary cont))
633 ;; It is necessary for the case where this
634 ;; function is called recursively since
635 ;; `m-g-d-t' will be bound to "message/rfc822"
636 ;; when encoding an article to be forwarded.
637 (mml-generate-default-type "text/plain"))
639 ;; Update handle so mml-compute-boundary can
640 ;; detect collisions with the nested parts.
641 (unless mml-inhibit-compute-boundary
642 (setcdr (assoc 'contents cont) (buffer-string))))
643 (let ((mm-7bit-chars (concat mm-7bit-chars "\x1b")))
644 ;; ignore 0x1b, it is part of iso-2022-jp
645 (setq encoding (mm-body-7-or-8))))
646 ((string= (car (split-string type "/")) "message")
647 (let ((mm-7bit-chars (concat mm-7bit-chars "\x1b")))
648 ;; ignore 0x1b, it is part of iso-2022-jp
649 (setq encoding (mm-body-7-or-8))))
651 ;; Only perform format=flowed filling on text/plain
652 ;; parts where there either isn't a format parameter
653 ;; in the mml tag or it says "flowed" and there
654 ;; actually are hard newlines in the text.
655 (let (use-hard-newlines)
656 (when (and mml-enable-flowed
657 (string= type "text/plain")
658 (not (string= (cdr (assq 'sign cont)) "pgp"))
659 (or (null (assq 'format cont))
660 (string= (cdr (assq 'format cont))
662 (setq use-hard-newlines
664 (point-min) (point-max) 'hard 't)))
666 ;; Indicate that `mml-insert-mime-headers' should
667 ;; insert a "; format=flowed" string unless the
668 ;; user has already specified it.
669 (setq flowed (null (assq 'format cont)))))
670 ;; Prefer `utf-8' for text/calendar parts.
672 (not (string= type "text/calendar")))
673 (setq charset (mm-encode-body charset))
674 (let ((mm-coding-system-priorities
675 (cons 'utf-8 mm-coding-system-priorities)))
676 (setq charset (mm-encode-body))))
677 (mm-disable-multibyte)
678 (setq encoding (mm-body-encoding
679 charset (cdr (assq 'encoding cont))))))
680 (setq coded (buffer-string)))
681 (mml-insert-mime-headers cont type charset encoding flowed)
684 (mm-with-unibyte-buffer
686 ((cdr (assq 'buffer cont))
687 (insert (string-as-unibyte
688 (with-current-buffer (cdr (assq 'buffer cont))
691 (not (equal (cdr (assq 'nofile cont)) "yes")))
692 (let ((coding-system-for-read mm-binary-coding-system))
693 (mm-insert-file-contents filename nil nil nil nil t))
695 (setq charset (mm-coding-system-to-mime-charset
696 (mm-find-buffer-file-coding-system
699 (let ((contents (cdr (assq 'contents cont))))
700 (if (multibyte-string-p contents)
702 (mm-enable-multibyte)
705 (setq charset (mm-encode-body charset))))
706 (insert contents)))))
707 (if (setq encoding (cdr (assq 'encoding cont)))
708 (setq encoding (intern (downcase encoding))))
709 (setq encoding (mm-encode-buffer type encoding)
710 coded (string-as-multibyte (buffer-string))))
711 (mml-insert-mime-headers cont type charset encoding nil)
712 (insert "\n" coded))))
713 ((eq (car cont) 'external)
714 (insert "Content-Type: message/external-body")
715 (let ((parameters (mml-parameter-string
716 cont '(expiration size permission)))
717 (name (cdr (assq 'name cont)))
718 (url (cdr (assq 'url cont))))
720 (setq name (mml-parse-file-name name))
722 (mml-insert-parameter
723 (mail-header-encode-parameter "name" name)
724 "access-type=local-file")
725 (mml-insert-parameter
726 (mail-header-encode-parameter
727 "name" (file-name-nondirectory (nth 2 name)))
728 (mail-header-encode-parameter "site" (nth 1 name))
729 (mail-header-encode-parameter
730 "directory" (file-name-directory (nth 2 name))))
731 (mml-insert-parameter
732 (concat "access-type="
733 (if (member (nth 0 name) '("ftp@" "anonymous@"))
737 (mml-insert-parameter
738 (mail-header-encode-parameter "url" url)
741 (mml-insert-parameter-string
742 cont '(expiration size permission)))
744 (insert "Content-Type: "
745 (or (cdr (assq 'type cont))
747 (or (mm-default-file-encoding name)
748 "application/octet-stream")
751 (insert "Content-ID: " (message-make-message-id) "\n")
752 (insert "Content-Transfer-Encoding: "
753 (or (cdr (assq 'encoding cont)) "binary"))
755 (insert (or (cdr (assq 'contents cont))))
757 ((eq (car cont) 'multipart)
758 (let* ((type (or (cdr (assq 'type cont)) "mixed"))
759 (mml-generate-default-type (if (equal type "digest")
762 (handler (assoc type mml-generate-multipart-alist)))
764 (funcall (cdr handler) cont)
765 ;; No specific handler. Use default one.
766 (let ((mml-boundary (mml-compute-boundary cont)))
767 (insert (format "Content-Type: multipart/%s; boundary=\"%s\""
769 (if (cdr (assq 'start cont))
770 (format "; start=\"%s\"\n" (cdr (assq 'start cont)))
772 (let ((cont cont) part)
773 (while (setq part (pop cont))
774 ;; Skip `multipart' and attributes.
775 (when (and (consp part) (consp (cdr part)))
776 (insert "\n--" mml-boundary "\n")
777 (mml-generate-mime-1 part)
778 (goto-char (point-max)))))
779 (insert "\n--" mml-boundary "--\n")))))
781 (error "Invalid element: %S" cont)))
782 ;; handle sign & encrypt tags in a semi-smart way.
783 (let ((sign-item (assoc (cdr (assq 'sign cont)) mml-sign-alist))
784 (encrypt-item (assoc (cdr (assq 'encrypt cont))
787 (when (or sign-item encrypt-item)
788 (when (setq sender (cdr (assq 'sender cont)))
789 (message-options-set 'mml-sender sender)
790 (message-options-set 'message-sender sender))
791 (if (setq recipients (cdr (assq 'recipients cont)))
792 (message-options-set 'message-recipients recipients))
793 (let ((style (mml-signencrypt-style
794 (first (or sign-item encrypt-item)))))
795 ;; check if: we're both signing & encrypting, both methods
796 ;; are the same (why would they be different?!), and that
797 ;; the signencrypt style allows for combined operation.
798 (if (and sign-item encrypt-item (equal (first sign-item)
799 (first encrypt-item))
800 (equal style 'combined))
801 (funcall (nth 1 encrypt-item) cont t)
802 ;; otherwise, revert to the old behavior.
804 (funcall (nth 1 sign-item) cont))
806 (funcall (nth 1 encrypt-item) cont)))))))))
808 (defun mml-compute-boundary (cont)
809 "Return a unique boundary that does not exist in CONT."
810 (let ((mml-boundary (funcall mml-boundary-function
811 (incf mml-multipart-number))))
812 (unless mml-inhibit-compute-boundary
813 ;; This function tries again and again until it has found
814 ;; a unique boundary.
815 (while (not (catch 'not-unique
816 (mml-compute-boundary-1 cont)))))
819 (defun mml-compute-boundary-1 (cont)
821 ((member (car cont) '(part mml))
822 (mm-with-multibyte-buffer
823 (let ((mml-inhibit-compute-boundary t)
824 (mml-multipart-number 0)
825 mml-sign-alist mml-encrypt-alist)
826 (mml-generate-mime-1 cont))
827 (goto-char (point-min))
828 (when (re-search-forward (concat "^--" (regexp-quote mml-boundary))
830 (setq mml-boundary (funcall mml-boundary-function
831 (incf mml-multipart-number)))
832 (throw 'not-unique nil))))
833 ((eq (car cont) 'multipart)
834 (mapc 'mml-compute-boundary-1 (cddr cont))))
837 (defun mml-make-boundary (number)
838 (concat (make-string (% number 60) ?=)
844 (defun mml-content-disposition (type &optional filename)
845 "Return a default disposition name suitable to TYPE or FILENAME."
846 (let ((defs mml-content-disposition-alist)
847 disposition def types)
848 (while (and (not disposition) defs)
849 (setq def (pop defs))
850 (cond ((stringp (car def))
852 (string-match (car def) filename))
853 (setq disposition (cdr def))))
855 (when (string= (car (setq types (split-string type "/")))
857 (setq type (cadr types)
859 (while (and (not disposition) types)
860 (setq def (pop types))
861 (when (or (eq (car def) t) (string= type (car def)))
862 (setq disposition (cdr def))))))
864 (when (or (eq (car def) t) (string= type (car def)))
865 (setq disposition (cdr def))))))
866 (or disposition "attachment")))
868 (defun mml-insert-mime-headers (cont type charset encoding flowed)
869 (let (parameters id disposition description)
871 (mml-parameter-string
872 cont mml-content-type-parameters))
876 (not (equal type mml-generate-default-type))
877 mml-insert-mime-headers-always)
878 (when (consp charset)
880 "Can't encode a part with several charsets"))
881 (insert "Content-Type: " type)
883 (mml-insert-parameter
884 (mail-header-encode-parameter "charset" (symbol-name charset))))
886 (mml-insert-parameter "format=flowed"))
888 (mml-insert-parameter-string
889 cont mml-content-type-parameters))
891 (when (setq id (cdr (assq 'id cont)))
892 (insert "Content-ID: " id "\n"))
894 (mml-parameter-string
895 cont mml-content-disposition-parameters))
896 (when (or (setq disposition (cdr (assq 'disposition cont)))
898 (insert "Content-Disposition: "
900 (mml-content-disposition type (cdr (assq 'filename cont)))))
902 (mml-insert-parameter-string
903 cont mml-content-disposition-parameters))
905 (unless (eq encoding '7bit)
906 (insert (format "Content-Transfer-Encoding: %s\n" encoding)))
907 (when (setq description (cdr (assq 'description cont)))
908 (insert "Content-Description: ")
909 (setq description (prog1
911 (insert description "\n")))
912 (mail-encode-encoded-word-region description (point)))))
914 (defun mml-parameter-string (cont types)
917 (while (setq type (pop types))
918 (when (setq value (cdr (assq type cont)))
919 ;; Strip directory component from the filename parameter.
920 (when (eq type 'filename)
921 (setq value (file-name-nondirectory value)))
922 (setq string (concat string "; "
923 (mail-header-encode-parameter
924 (symbol-name type) value)))))
925 (when (not (zerop (length string)))
928 (defun mml-insert-parameter-string (cont types)
930 (while (setq type (pop types))
931 (when (setq value (cdr (assq type cont)))
932 ;; Strip directory component from the filename parameter.
933 (when (eq type 'filename)
934 (setq value (file-name-nondirectory value)))
935 (mml-insert-parameter
936 (mail-header-encode-parameter
937 (symbol-name type) value))))))
939 (defvar ange-ftp-name-format)
940 (defvar efs-path-regexp)
942 (defun mml-parse-file-name (path)
943 (if (if (boundp 'efs-path-regexp)
944 (string-match efs-path-regexp path)
945 (if (boundp 'ange-ftp-name-format)
946 (string-match (car ange-ftp-name-format) path)))
947 (list (match-string 1 path) (match-string 2 path)
948 (substring path (1+ (match-end 2))))
951 (defun mml-insert-buffer (buffer)
952 "Insert BUFFER at point and quote any MML markup."
954 (narrow-to-region (point) (point))
955 (insert-buffer-substring buffer)
956 (mml-quote-region (point-min) (point-max))
957 (goto-char (point-max))))
960 ;;; Transforming MIME to MML
963 ;; message-narrow-to-head autoloads message.
964 (declare-function message-remove-header "message"
965 (header &optional is-regexp first reverse))
967 (defun mime-to-mml (&optional handles)
968 "Translate the current buffer (which should be a message) into MML.
969 If HANDLES is non-nil, use it instead reparsing the buffer."
970 ;; First decode the head.
972 (message-narrow-to-head)
973 (let ((rfc2047-quote-decoded-words-containing-tspecials t))
974 (mail-decode-encoded-word-region (point-min) (point-max))))
976 (setq handles (mm-dissect-buffer t)))
977 (goto-char (point-min))
978 (search-forward "\n\n" nil t)
979 (delete-region (point) (point-max))
980 (if (stringp (car handles))
981 (mml-insert-mime handles)
982 (mml-insert-mime handles t))
983 (mm-destroy-parts handles)
985 (message-narrow-to-head)
986 ;; Remove them, they are confusing.
987 (message-remove-header "Content-Type")
988 (message-remove-header "MIME-Version")
989 (message-remove-header "Content-Disposition")
990 (message-remove-header "Content-Transfer-Encoding")))
992 (autoload 'message-encode-message-body "message")
993 (declare-function message-narrow-to-headers-or-head "message" ())
996 (defun mml-to-mime ()
997 "Translate the current buffer from MML to MIME."
998 ;; `message-encode-message-body' will insert an encoded Content-Description
999 ;; header in the message header if the body contains a single part
1000 ;; that is specified by a user with a MML tag containing a description
1001 ;; token. So, we encode the message header first to prevent the encoded
1002 ;; Content-Description header from being encoded again.
1004 (message-narrow-to-headers-or-head)
1005 ;; Skip past any From_ headers.
1006 (while (looking-at "From ")
1008 (let ((mail-parse-charset message-default-charset))
1009 (mail-encode-encoded-word-buffer)))
1010 (message-encode-message-body))
1012 (defun mml-insert-mime (handle &optional no-markup)
1013 (let (textp buffer mmlp)
1014 ;; Determine type and stuff.
1015 (unless (stringp (car handle))
1016 (unless (setq textp (equal (mm-handle-media-supertype handle) "text"))
1017 (with-current-buffer (setq buffer (mml-generate-new-buffer " *mml*"))
1018 (if (eq (mail-content-type-get (mm-handle-type handle) 'charset)
1020 ;; A part that mm-uu dissected from a non-MIME message
1021 ;; because of `gnus-article-emulate-mime'.
1023 (mm-enable-multibyte)
1024 (insert-buffer-substring (mm-handle-buffer handle)))
1025 (mm-insert-part handle 'no-cache)
1026 (if (setq mmlp (equal (mm-handle-media-type handle)
1030 (mml-insert-mml-markup handle nil t t)
1031 (unless (and no-markup
1032 (equal (mm-handle-media-type handle) "text/plain"))
1033 (mml-insert-mml-markup handle buffer textp)))
1036 (insert-buffer-substring buffer)
1037 (goto-char (point-max))
1038 (insert "<#/mml>\n"))
1039 ((stringp (car handle))
1040 (mapc 'mml-insert-mime (cdr handle))
1041 (insert "<#/multipart>\n"))
1043 (let ((charset (mail-content-type-get
1044 (mm-handle-type handle) 'charset))
1046 (if (eq charset 'gnus-decoded)
1047 (mm-insert-part handle)
1048 (insert (mm-decode-string (mm-get-part handle) charset)))
1049 (mml-quote-region start (point)))
1050 (goto-char (point-max)))
1052 (insert "<#/part>\n")))))
1054 (defun mml-insert-mml-markup (handle &optional buffer nofile mmlp)
1055 "Take a MIME handle and insert an MML tag."
1056 (if (stringp (car handle))
1058 (insert "<#multipart type=" (mm-handle-media-subtype handle))
1059 (let ((start (mm-handle-multipart-ctl-parameter handle 'start)))
1061 (insert " start=\"" start "\"")))
1064 (insert "<#mml type=" (mm-handle-media-type handle))
1065 (insert "<#part type=" (mm-handle-media-type handle)))
1066 (dolist (elem (append (cdr (mm-handle-type handle))
1067 (cdr (mm-handle-disposition handle))))
1068 (unless (symbolp (cdr elem))
1069 (insert " " (symbol-name (car elem)) "=\"" (cdr elem) "\"")))
1070 (when (mm-handle-id handle)
1071 (insert " id=\"" (mm-handle-id handle) "\""))
1072 (when (mm-handle-disposition handle)
1073 (insert " disposition=" (car (mm-handle-disposition handle))))
1075 (insert " buffer=\"" (buffer-name buffer) "\""))
1077 (insert " nofile=yes"))
1078 (when (mm-handle-description handle)
1079 (insert " description=\"" (mm-handle-description handle) "\""))
1082 (defun mml-insert-parameter (&rest parameters)
1083 "Insert PARAMETERS in a nice way."
1085 (dolist (param parameters)
1087 (setq start (point))
1092 (if (> (current-column) 76)
1096 (goto-char (1+ end)))
1100 ;;; Mode for inserting and editing MML forms
1103 (defvar mml-mode-map
1104 (let ((sign (make-sparse-keymap))
1105 (encrypt (make-sparse-keymap))
1106 (signpart (make-sparse-keymap))
1107 (encryptpart (make-sparse-keymap))
1108 (map (make-sparse-keymap))
1109 (main (make-sparse-keymap)))
1110 (define-key map "\C-s" 'mml-secure-message-sign)
1111 (define-key map "\C-c" 'mml-secure-message-encrypt)
1112 (define-key map "\C-e" 'mml-secure-message-sign-encrypt)
1113 (define-key map "\C-p\C-s" 'mml-secure-sign)
1114 (define-key map "\C-p\C-c" 'mml-secure-encrypt)
1115 (define-key sign "p" 'mml-secure-message-sign-pgpmime)
1116 (define-key sign "o" 'mml-secure-message-sign-pgp)
1117 (define-key sign "s" 'mml-secure-message-sign-smime)
1118 (define-key signpart "p" 'mml-secure-sign-pgpmime)
1119 (define-key signpart "o" 'mml-secure-sign-pgp)
1120 (define-key signpart "s" 'mml-secure-sign-smime)
1121 (define-key encrypt "p" 'mml-secure-message-encrypt-pgpmime)
1122 (define-key encrypt "o" 'mml-secure-message-encrypt-pgp)
1123 (define-key encrypt "s" 'mml-secure-message-encrypt-smime)
1124 (define-key encryptpart "p" 'mml-secure-encrypt-pgpmime)
1125 (define-key encryptpart "o" 'mml-secure-encrypt-pgp)
1126 (define-key encryptpart "s" 'mml-secure-encrypt-smime)
1127 (define-key map "\C-n" 'mml-unsecure-message)
1128 (define-key map "f" 'mml-attach-file)
1129 (define-key map "b" 'mml-attach-buffer)
1130 (define-key map "e" 'mml-attach-external)
1131 (define-key map "q" 'mml-quote-region)
1132 (define-key map "m" 'mml-insert-multipart)
1133 (define-key map "p" 'mml-insert-part)
1134 (define-key map "v" 'mml-validate)
1135 (define-key map "P" 'mml-preview)
1136 (define-key map "s" sign)
1137 (define-key map "S" signpart)
1138 (define-key map "c" encrypt)
1139 (define-key map "C" encryptpart)
1140 ;;(define-key map "n" 'mml-narrow-to-part)
1141 ;; `M-m' conflicts with `back-to-indentation'.
1142 ;; (define-key main "\M-m" map)
1143 (define-key main "\C-c\C-m" map)
1147 mml-menu mml-mode-map ""
1149 ["Attach File..." mml-attach-file :help "Attach a file at point"]
1150 ["Attach Buffer..." mml-attach-buffer
1151 :help "Attach a buffer to the outgoing message"]
1152 ["Attach External..." mml-attach-external
1153 :help "Attach reference to an external file"]
1154 ;; FIXME: Is it possible to do this without using
1155 ;; `gnus-gcc-externalize-attachments'?
1156 ["Externalize Attachments"
1159 (setq gnus-gcc-externalize-attachments
1160 (not gnus-gcc-externalize-attachments))
1161 (message "gnus-gcc-externalize-attachments is `%s'."
1162 gnus-gcc-externalize-attachments))
1163 :visible (and (boundp 'gnus-gcc-externalize-attachments)
1164 (memq gnus-gcc-externalize-attachments
1167 :selected gnus-gcc-externalize-attachments
1168 :help "Save attachments as external parts in Gcc copies"]
1171 ("Change Security Method"
1173 (lambda () (interactive) (setq mml-secure-method "pgpmime"))
1174 :help "Set Security Method to PGP/MIME"
1176 :selected (equal mml-secure-method "pgpmime") ]
1178 (lambda () (interactive) (setq mml-secure-method "smime"))
1179 :help "Set Security Method to S/MIME"
1181 :selected (equal mml-secure-method "smime") ]
1183 (lambda () (interactive) (setq mml-secure-method "pgp"))
1184 :help "Set Security Method to inline PGP"
1186 :selected (equal mml-secure-method "pgp") ] )
1188 ["Sign Message" mml-secure-message-sign t]
1189 ["Encrypt Message" mml-secure-message-encrypt t]
1190 ["Sign and Encrypt Message" mml-secure-message-sign-encrypt t]
1191 ["Encrypt/Sign off" mml-unsecure-message
1192 :help "Don't Encrypt/Sign Message"]
1193 ;; Do we have separate encrypt and encrypt/sign commands for parts?
1194 ["Sign Part" mml-secure-sign t]
1195 ["Encrypt Part" mml-secure-encrypt t]
1197 ;; Maybe we could remove these, because people who write MML most probably
1198 ;; don't use the menu:
1199 ["Insert Part..." mml-insert-part
1200 :active (message-in-body-p)]
1201 ["Insert Multipart..." mml-insert-multipart
1202 :active (message-in-body-p)]
1204 ;;["Narrow" mml-narrow-to-part t]
1205 ["Quote MML in region" mml-quote-region
1206 :active (message-mark-active-p)
1207 :help "Quote MML tags in region"]
1208 ["Validate MML" mml-validate t]
1209 ["Preview" mml-preview t]
1211 ["Emacs MIME manual" (lambda () (interactive) (message-info 4))
1212 :help "Display the Emacs MIME manual"]
1213 ["PGG manual" (lambda () (interactive) (message-info mml2015-use))
1214 :visible (and (boundp 'mml2015-use) (equal mml2015-use 'pgg))
1215 :help "Display the PGG manual"]
1216 ["EasyPG manual" (lambda () (interactive) (require 'mml2015) (message-info mml2015-use))
1217 :visible (and (boundp 'mml2015-use) (equal mml2015-use 'epg))
1218 :help "Display the EasyPG manual"]))
1220 (define-minor-mode mml-mode
1221 "Minor mode for editing MML.
1222 MML is the MIME Meta Language, a minor mode for composing MIME articles.
1223 See Info node `(emacs-mime)Composing'.
1226 :lighter " MML" :keymap mml-mode-map
1228 (easy-menu-add mml-menu mml-mode-map)
1229 (when (boundp 'dnd-protocol-alist)
1230 (set (make-local-variable 'dnd-protocol-alist)
1231 (append mml-dnd-protocol-alist dnd-protocol-alist)))))
1234 ;;; Helper functions for reading MIME stuff from the minibuffer and
1235 ;;; inserting stuff to the buffer.
1238 (defcustom mml-default-directory mm-default-directory
1239 "The default directory where mml will find files.
1240 If not set, `default-directory' will be used."
1241 :type '(choice directory (const :tag "Default" nil))
1242 :version "23.1" ;; No Gnus
1245 (defun mml-minibuffer-read-file (prompt)
1246 (let* ((completion-ignored-extensions nil)
1247 (file (read-file-name prompt
1248 (or mml-default-directory default-directory)
1250 ;; Prevent some common errors. This is inspired by similar code in
1252 (when (file-directory-p file)
1253 (error "%s is a directory, cannot attach" file))
1254 (unless (file-exists-p file)
1255 (error "No such file: %s" file))
1256 (unless (file-readable-p file)
1257 (error "Permission denied: %s" file))
1260 (declare-function mailcap-parse-mimetypes "mailcap" (&optional path force))
1261 (declare-function mailcap-mime-types "mailcap" ())
1263 (defun mml-minibuffer-read-type (name &optional default)
1265 (mailcap-parse-mimetypes)
1266 (let* ((default (or default
1267 (mm-default-file-encoding name)
1268 ;; Perhaps here we should check what the file
1269 ;; looks like, and offer text/plain if it looks
1271 "application/octet-stream"))
1272 (string (gnus-completing-read
1274 (mailcap-mime-types)
1275 nil nil nil default)))
1276 (if (not (equal string ""))
1280 (defun mml-minibuffer-read-description (&optional default)
1281 (let ((description (read-string "One line description: " default)))
1282 (when (string-match "\\`[ \t]*\\'" description)
1283 (setq description nil))
1286 (defun mml-minibuffer-read-disposition (type &optional default filename)
1288 (setq default (mml-content-disposition type filename)))
1289 (let ((disposition (gnus-completing-read
1291 '("attachment" "inline")
1292 t nil nil default)))
1293 (if (not (equal disposition ""))
1297 (defun mml-quote-region (beg end)
1298 "Quote the MML tags in the region."
1302 ;; Temporarily narrow the region to defend from changes
1303 ;; invalidating END.
1304 (narrow-to-region beg end)
1305 (goto-char (point-min))
1307 (while (re-search-forward
1308 "<#!*/?\\(multipart\\|part\\|external\\|mml\\|secure\\)" nil t)
1309 ;; Insert ! after the #.
1310 (goto-char (+ (match-beginning 0) 2))
1313 (defun mml-insert-tag (name &rest plist)
1314 "Insert an MML tag described by NAME and PLIST."
1315 (when (symbolp name)
1316 (setq name (symbol-name name)))
1319 (let ((key (pop plist))
1320 (value (pop plist)))
1322 ;; Quote VALUE if it contains suspicious characters.
1323 (when (string-match "[\"'\\~/*;() \t\n]" value)
1324 (setq value (with-output-to-string
1325 (let (print-escape-nonascii)
1327 (insert (format " %s=%s" key value)))))
1330 (defun mml-insert-empty-tag (name &rest plist)
1331 "Insert an empty MML tag described by NAME and PLIST."
1332 (when (symbolp name)
1333 (setq name (symbol-name name)))
1334 (apply #'mml-insert-tag name plist)
1335 (insert "<#/" name ">\n"))
1337 ;;; Attachment functions.
1339 (defcustom mml-dnd-protocol-alist
1340 '(("^file:///" . mml-dnd-attach-file)
1341 ("^file://" . dnd-open-file)
1342 ("^file:" . mml-dnd-attach-file))
1343 "The functions to call when a drop in `mml-mode' is made.
1344 See `dnd-protocol-alist' for more information. When nil, behave
1345 as in other buffers."
1346 :type '(choice (repeat (cons (regexp) (function)))
1347 (const :tag "Behave as in other buffers" nil))
1348 :version "22.1" ;; Gnus 5.10.9
1351 (defcustom mml-dnd-attach-options nil
1352 "Which options should be queried when attaching a file via drag and drop.
1354 If it is a list, valid members are `type', `description' and
1355 `disposition'. `disposition' implies `type'. If it is nil,
1356 don't ask for options. If it is t, ask the user whether or not
1357 to specify options."
1359 (const :tag "None" nil)
1360 (const :tag "Query" t)
1361 (list :value (type description disposition)
1365 (const disposition))))
1366 :version "22.1" ;; Gnus 5.10.9
1370 (defun mml-attach-file (file &optional type description disposition)
1371 "Attach a file to the outgoing MIME message.
1372 The file is not inserted or encoded until you send the message with
1373 `\\[message-send-and-exit]' or `\\[message-send]' in Message mode,
1374 or `\\[mail-send-and-exit]' or `\\[mail-send]' in Mail mode.
1376 FILE is the name of the file to attach. TYPE is its
1377 content-type, a string of the form \"type/subtype\". DESCRIPTION
1378 is a one-line description of the attachment. The DISPOSITION
1379 specifies how the attachment is intended to be displayed. It can
1380 be either \"inline\" (displayed automatically within the message
1381 body) or \"attachment\" (separate from the body)."
1383 (let* ((file (mml-minibuffer-read-file "Attach file: "))
1384 (type (mml-minibuffer-read-type file))
1385 (description (mml-minibuffer-read-description))
1386 (disposition (mml-minibuffer-read-disposition type nil file)))
1387 (list file type description disposition)))
1388 ;; If in the message header, attach at the end and leave point unchanged.
1389 (let ((head (unless (message-in-body-p) (point))))
1390 (if head (goto-char (point-max)))
1391 (mml-insert-empty-tag 'part
1393 ;; icicles redefines read-file-name and returns a
1394 ;; string w/ text properties :-/
1395 'filename (substring-no-properties file)
1396 'disposition (or disposition "attachment")
1397 'description description)
1398 ;; When using Mail mode, make sure it does the mime encoding
1399 ;; when you send the message.
1400 (or (eq mail-user-agent 'message-user-agent)
1401 (setq mail-encode-mml t))
1403 (unless (pos-visible-in-window-p)
1404 (message "The file \"%s\" has been attached at the end of the message"
1405 (file-name-nondirectory file)))
1408 (defun mml-dnd-attach-file (uri action)
1409 "Attach a drag and drop file.
1411 Ask for type, description or disposition according to
1412 `mml-dnd-attach-options'."
1413 (let ((file (dnd-get-local-file-name uri t)))
1414 (when (and file (file-regular-p file))
1415 (let ((mml-dnd-attach-options mml-dnd-attach-options)
1416 type description disposition)
1417 (setq mml-dnd-attach-options
1418 (when (and (eq mml-dnd-attach-options t)
1421 "Use default type, disposition and description? ")))
1422 '(type description disposition)))
1423 (when (or (memq 'type mml-dnd-attach-options)
1424 (memq 'disposition mml-dnd-attach-options))
1425 (setq type (mml-minibuffer-read-type file)))
1426 (when (memq 'description mml-dnd-attach-options)
1427 (setq description (mml-minibuffer-read-description)))
1428 (when (memq 'disposition mml-dnd-attach-options)
1429 (setq disposition (mml-minibuffer-read-disposition type nil file)))
1430 (mml-attach-file file type description disposition)))))
1432 (defun mml-attach-buffer (buffer &optional type description disposition)
1433 "Attach a buffer to the outgoing MIME message.
1434 BUFFER is the name of the buffer to attach. See
1435 `mml-attach-file' for details of operation."
1437 (let* ((buffer (read-buffer "Attach buffer: "))
1438 (type (mml-minibuffer-read-type buffer "text/plain"))
1439 (description (mml-minibuffer-read-description))
1440 (disposition (mml-minibuffer-read-disposition type nil)))
1441 (list buffer type description disposition)))
1442 ;; If in the message header, attach at the end and leave point unchanged.
1443 (let ((head (unless (message-in-body-p) (point))))
1444 (if head (goto-char (point-max)))
1445 (mml-insert-empty-tag 'part 'type type 'buffer buffer
1446 'disposition disposition
1447 'description description)
1448 ;; When using Mail mode, make sure it does the mime encoding
1449 ;; when you send the message.
1450 (or (eq mail-user-agent 'message-user-agent)
1451 (setq mail-encode-mml t))
1453 (unless (pos-visible-in-window-p)
1455 "The buffer \"%s\" has been attached at the end of the message"
1459 (defun mml-attach-external (file &optional type description)
1460 "Attach an external file into the buffer.
1461 FILE is an ange-ftp/efs specification of the part location.
1462 TYPE is the MIME type to use."
1464 (let* ((file (mml-minibuffer-read-file "Attach external file: "))
1465 (type (mml-minibuffer-read-type file))
1466 (description (mml-minibuffer-read-description)))
1467 (list file type description)))
1468 ;; If in the message header, attach at the end and leave point unchanged.
1469 (let ((head (unless (message-in-body-p) (point))))
1470 (if head (goto-char (point-max)))
1471 (mml-insert-empty-tag 'external 'type type 'name file
1472 'disposition "attachment" 'description description)
1473 ;; When using Mail mode, make sure it does the mime encoding
1474 ;; when you send the message.
1475 (or (eq mail-user-agent 'message-user-agent)
1476 (setq mail-encode-mml t))
1478 (unless (pos-visible-in-window-p)
1479 (message "The file \"%s\" has been attached at the end of the message"
1480 (file-name-nondirectory file)))
1483 (defun mml-insert-multipart (&optional type)
1484 (interactive (if (message-in-body-p)
1485 (list (gnus-completing-read "Multipart type"
1486 '("mixed" "alternative"
1488 "signed" "encrypted")
1490 (error "Use this command in the message body")))
1492 (setq type "mixed"))
1493 (mml-insert-empty-tag "multipart" 'type type)
1494 ;; When using Mail mode, make sure it does the mime encoding
1495 ;; when you send the message.
1496 (or (eq mail-user-agent 'message-user-agent)
1497 (setq mail-encode-mml t))
1500 (defun mml-insert-part (&optional type)
1501 (interactive (if (message-in-body-p)
1502 (list (mml-minibuffer-read-type ""))
1503 (error "Use this command in the message body")))
1504 ;; When using Mail mode, make sure it does the mime encoding
1505 ;; when you send the message.
1506 (or (eq mail-user-agent 'message-user-agent)
1507 (setq mail-encode-mml t))
1508 (mml-insert-tag 'part 'type type 'disposition "inline")
1510 (mml-insert-tag '/part)))
1512 (declare-function message-subscribed-p "message" ())
1513 (declare-function message-make-mail-followup-to "message"
1514 (&optional only-show-subscribed))
1515 (declare-function message-position-on-field "message" (header &rest afters))
1517 (defun mml-preview-insert-mail-followup-to ()
1518 "Insert a Mail-Followup-To header before previewing an article.
1519 Should be adopted if code in `message-send-mail' is changed."
1520 (when (and (message-mail-p)
1521 (message-subscribed-p)
1522 (not (mail-fetch-field "mail-followup-to"))
1523 (message-make-mail-followup-to))
1524 (message-position-on-field "Mail-Followup-To" "X-Draft-From")
1525 (insert (message-make-mail-followup-to))))
1527 (defvar mml-preview-buffer nil)
1529 (autoload 'gnus-make-hashtable "gnus-util")
1530 (autoload 'widget-button-press "wid-edit" nil t)
1531 (declare-function widget-event-point "wid-edit" (event))
1532 ;; If gnus-buffer-configuration is bound this is loaded.
1533 (declare-function gnus-configure-windows "gnus-win" (setting &optional force))
1534 ;; Called after message-mail-p, which autoloads message.
1535 (declare-function message-news-p "message" ())
1536 (declare-function message-options-set-recipient "message" ())
1537 (declare-function message-generate-headers "message" (headers))
1538 (declare-function message-sort-headers "message" ())
1540 (defun mml-preview (&optional raw)
1541 "Display current buffer with Gnus, in a new buffer.
1542 If RAW, display a raw encoded MIME message.
1544 The window layout for the preview buffer is controlled by the variables
1545 `special-display-buffer-names', `special-display-regexps', or
1546 `gnus-buffer-configuration' (the first match made will be used),
1547 or the `pop-to-buffer' function."
1549 (setq mml-preview-buffer (generate-new-buffer
1550 (concat (if raw "*Raw MIME preview of "
1551 "*MIME preview of ") (buffer-name))))
1552 (require 'gnus-msg) ; for gnus-setup-posting-charset
1554 (let* ((buf (current-buffer))
1555 (article-editing (eq major-mode 'gnus-article-edit-mode))
1556 (message-options message-options)
1557 (message-this-is-mail (message-mail-p))
1558 (message-this-is-news (message-news-p))
1559 (message-posting-charset (or (gnus-setup-posting-charset
1561 (message-narrow-to-headers-or-head)
1562 (message-fetch-field "Newsgroups")))
1563 message-posting-charset)))
1564 (message-options-set-recipient)
1565 (when (boundp 'gnus-buffers)
1566 (push mml-preview-buffer gnus-buffers))
1569 (set-buffer mml-preview-buffer)
1571 (insert-buffer-substring buf))
1572 (mml-preview-insert-mail-followup-to)
1573 (let ((message-deletable-headers (if (message-news-p)
1575 message-deletable-headers))
1576 (mail-header-separator (if article-editing
1578 mail-header-separator)))
1579 (message-generate-headers
1580 (copy-sequence (if (message-news-p)
1581 message-required-news-headers
1582 message-required-mail-headers)))
1583 (unless article-editing
1584 (if (re-search-forward
1585 (concat "^" (regexp-quote mail-header-separator) "\n") nil t)
1586 (replace-match "\n"))
1587 (setq mail-header-separator ""))
1588 (message-sort-headers)
1591 (let ((s (buffer-string)))
1592 ;; Insert the content into unibyte buffer.
1594 (mm-disable-multibyte)
1596 (let ((gnus-newsgroup-charset (car message-posting-charset))
1597 gnus-article-prepare-hook gnus-original-article-buffer
1598 gnus-displaying-mime)
1599 (run-hooks 'gnus-article-decode-hook)
1600 (let ((gnus-newsgroup-name "dummy")
1601 (gnus-newsrc-hashtb (or gnus-newsrc-hashtb
1602 (gnus-make-hashtable 5))))
1603 (gnus-article-prepare-display))))
1604 ;; Disable article-mode-map.
1606 (add-hook 'kill-buffer-hook
1608 (mm-destroy-parts gnus-article-mime-handles)) nil t)
1609 (setq buffer-read-only t)
1610 (local-set-key "q" (lambda () (interactive) (kill-buffer nil)))
1611 (local-set-key "=" (lambda () (interactive) (delete-other-windows)))
1615 (widget-button-press (point))))
1616 (local-set-key [mouse-2]
1619 (widget-button-press (widget-event-point event) event)))
1620 ;; FIXME: Buffer is in article mode, but most tool bar commands won't
1621 ;; work. Maybe only keep the following icons: search, print, quit
1622 (goto-char (point-min))))
1623 (if (and (not (special-display-p (buffer-name mml-preview-buffer)))
1624 (boundp 'gnus-buffer-configuration)
1625 (assq 'mml-preview gnus-buffer-configuration))
1626 (let ((gnus-message-buffer (current-buffer)))
1627 (gnus-configure-windows 'mml-preview))
1628 (pop-to-buffer mml-preview-buffer)))
1630 (defun mml-validate ()
1631 "Validate the current MML document."
1635 (defun mml-tweak-part (cont)
1637 (let ((tweak (cdr (assq 'tweak cont)))
1642 (or (cdr (assoc tweak mml-tweak-function-alist))
1644 (mml-tweak-type-alist
1645 (let ((alist mml-tweak-type-alist)
1646 (type (or (cdr (assq 'type cont)) "text/plain")))
1648 (if (string-match (caar alist) type)
1649 (setq func (cdar alist)
1651 (setq alist (cdr alist)))))))
1655 (let ((alist mml-tweak-sexp-alist))
1657 (if (eval (caar alist))
1658 (funcall (cdar alist) cont))
1659 (setq alist (cdr alist)))))
1662 (defun mml-tweak-externalize-attachments (cont)
1663 "Tweak attached files as external parts."
1664 (let (filename-cons)
1665 (when (and (eq (car cont) 'part)
1666 (not (cdr (assq 'buffer cont)))
1667 (and (setq filename-cons (assq 'filename cont))
1668 (not (equal (cdr (assq 'nofile cont)) "yes"))))
1669 (setcar cont 'external)
1670 (setcar filename-cons 'name))))
1674 ;;; mml.el ends here