mml.el 60.1 KB
Newer Older
1
;;; mml.el --- A package for parsing and validating MML documents
2

Paul Eggert's avatar
Paul Eggert committed
3
;; Copyright (C) 1998-2019 Free Software Foundation, Inc.
Gerd Moellmann's avatar
Gerd Moellmann committed
4 5 6 7

;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; This file is part of GNU Emacs.

8
;; GNU Emacs is free software: you can redistribute it and/or modify
Gerd Moellmann's avatar
Gerd Moellmann committed
9
;; it under the terms of the GNU General Public License as published by
10 11
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
Gerd Moellmann's avatar
Gerd Moellmann committed
12 13 14

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Gerd Moellmann's avatar
Gerd Moellmann committed
16 17 18
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
19
;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
Gerd Moellmann's avatar
Gerd Moellmann committed
20 21 22 23 24 25 26 27 28

;;; Commentary:

;;; Code:

(require 'mm-util)
(require 'mm-bodies)
(require 'mm-encode)
(require 'mm-decode)
29
(require 'mml-sec)
Glenn Morris's avatar
Glenn Morris committed
30
(eval-when-compile (require 'cl-lib))
31
(eval-when-compile (require 'url))
32
(eval-when-compile (require 'gnus-util))
Gerd Moellmann's avatar
Gerd Moellmann committed
33

34
(autoload 'message-make-message-id "message")
35
(declare-function gnus-setup-posting-charset "gnus-msg" (group))
36
(autoload 'gnus-completing-read "gnus-util")
37 38 39 40 41 42
(autoload 'message-fetch-field "message")
(autoload 'message-mark-active-p "message")
(autoload 'message-info "message")
(autoload 'fill-flowed-encode "flow-fill")
(autoload 'message-posting-charset "message")
(autoload 'dnd-get-local-file-name "dnd")
Gerd Moellmann's avatar
Gerd Moellmann committed
43

44 45 46 47 48
(autoload 'message-options-set    "message")
(autoload 'message-narrow-to-head "message")
(autoload 'message-in-body-p      "message")
(autoload 'message-mail-p         "message")

49 50 51 52 53 54 55
(defvar gnus-article-mime-handles)
(defvar gnus-newsrc-hashtb)
(defvar message-deletable-headers)
(defvar message-options)
(defvar message-posting-charset)
(defvar message-required-mail-headers)
(defvar message-required-news-headers)
56
(defvar dnd-protocol-alist)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
57
(defvar mml-dnd-protocol-alist)
58

59 60
(defcustom mml-content-type-parameters
  '(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."
63
  :version "22.1"
64 65 66 67 68
  :type '(repeat (symbol :tag "Parameter"))
  :group 'message)

(defcustom mml-content-disposition-parameters
  '(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."
71
  :version "22.1"
72 73 74
  :type '(repeat (symbol :tag "Parameter"))
  :group 'message)

75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91
(defcustom mml-content-disposition-alist
  '((text (rtf . "attachment") (t . "inline"))
    (t . "attachment"))
  "Alist of MIME types or regexps matching file names and default dispositions.
Each element should be one of the following three forms:

  (REGEXP . DISPOSITION)
  (SUPERTYPE (SUBTYPE . DISPOSITION) (SUBTYPE . DISPOSITION)...)
  (TYPE . DISPOSITION)

Where REGEXP is a string which matches the file name (if any) of an
attachment, SUPERTYPE, SUBTYPE and TYPE should be symbols which are a
MIME supertype (e.g., text), a MIME subtype (e.g., plain) and a MIME
type (e.g., text/plain) respectively, and DISPOSITION should be either
the string \"attachment\" or the string \"inline\".  The value t for
SUPERTYPE, SUBTYPE or TYPE matches any of those types.  The first
match found will be used."
92
  :version "23.1" ;; No Gnus
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114
  :type (let ((dispositions '(radio :format "DISPOSITION: %v"
				    :value "attachment"
				    (const :format "%v " "attachment")
				    (const :format "%v\n" "inline"))))
	  `(repeat
	    :offset 0
	    (choice :format "%[Value Menu%]%v"
		    (cons :tag "(REGEXP . DISPOSITION)" :extra-offset 4
			  (regexp :tag "REGEXP" :value ".*")
			  ,dispositions)
		    (cons :tag "(SUPERTYPE (SUBTYPE . DISPOSITION)...)"
			  :indent 0
			  (symbol :tag "    SUPERTYPE" :value text)
			  (repeat :format "%v%i\n" :offset 0 :extra-offset 4
				  (cons :format "%v" :extra-offset 5
					(symbol :tag "SUBTYPE" :value t)
					,dispositions)))
		    (cons :tag "(TYPE . DISPOSITION)" :extra-offset 4
			  (symbol :tag "TYPE" :value t)
			  ,dispositions))))
  :group 'message)

115
(defcustom mml-insert-mime-headers-always t
116 117
  "If non-nil, always put Content-Type: text/plain at top of empty parts.
It is necessary to work against a bug in certain clients."
118
  :version "24.1"
119 120 121
  :type 'boolean
  :group 'message)

122 123 124 125 126 127 128 129
(defcustom mml-enable-flowed t
  "If non-nil, enable format=flowed usage when encoding a message.
This is only performed when filling on text/plain with hard
newlines in the text."
  :version "24.1"
  :type 'boolean
  :group 'message)

130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150
(defvar mml-tweak-type-alist nil
  "A list of (TYPE . FUNCTION) for tweaking MML parts.
TYPE is a string containing a regexp to match the MIME type.  FUNCTION
is a Lisp function which is called with the MML handle to tweak the
part.  This variable is used only when no TWEAK parameter exists in
the MML handle.")

(defvar mml-tweak-function-alist nil
  "A list of (NAME . FUNCTION) for tweaking MML parts.
NAME is a string containing the name of the TWEAK parameter in the MML
handle.  FUNCTION is a Lisp function which is called with the MML
handle to tweak the part.")

(defvar mml-tweak-sexp-alist
  '((mml-externalize-attachments . mml-tweak-externalize-attachments))
  "A list of (SEXP . FUNCTION) for tweaking MML parts.
SEXP is an s-expression.  If the evaluation of SEXP is non-nil, FUNCTION
is called.  FUNCTION is a Lisp function which is called with the MML
handle to tweak the part.")

(defvar mml-externalize-attachments nil
151
  "If non-nil, local-file attachments are generated as external parts.")
152

153 154
(defcustom mml-generate-multipart-alist nil
  "Alist of multipart generation functions.
Gerd Moellmann's avatar
Gerd Moellmann committed
155
Each entry has the form (NAME . FUNCTION), where
156
NAME is a string containing the name of the part (without the
Gerd Moellmann's avatar
Gerd Moellmann committed
157 158 159 160
leading \"/multipart/\"),
FUNCTION is a Lisp function which is called to generate the part.

The Lisp function has to supply the appropriate MIME headers and the
161 162 163
contents of this part."
  :group 'message
  :type '(alist :key-type string :value-type function))
Gerd Moellmann's avatar
Gerd Moellmann committed
164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191

(defvar mml-syntax-table
  (let ((table (copy-syntax-table emacs-lisp-mode-syntax-table)))
    (modify-syntax-entry ?\\ "/" table)
    (modify-syntax-entry ?< "(" table)
    (modify-syntax-entry ?> ")" table)
    (modify-syntax-entry ?@ "w" table)
    (modify-syntax-entry ?/ "w" table)
    (modify-syntax-entry ?= " " table)
    (modify-syntax-entry ?* " " table)
    (modify-syntax-entry ?\; " " table)
    (modify-syntax-entry ?\' " " table)
    table))

(defvar mml-boundary-function 'mml-make-boundary
  "A function called to suggest a boundary.
The function may be called several times, and should try to make a new
suggestion each time.  The function is called with one parameter,
which is a number that says how many times the function has been
called for this message.")

(defvar mml-confirmation-set nil
  "A list of symbols, each of which disables some warning.
`unknown-encoding': always send messages contain characters with
unknown encoding; `use-ascii': always use ASCII for those characters
with unknown encoding; `multipart': always send messages with more than
one charsets.")

192 193 194 195 196 197 198
(defvar mml-generate-default-type "text/plain"
  "Content type by which the Content-Type header can be omitted.
The Content-Type header will not be put in the MIME part if the type
equals the value and there's no parameter (e.g. charset, format, etc.)
and `mml-insert-mime-headers-always' is nil.  The value will be bound
to \"message/rfc822\" when encoding an article to be forwarded as a MIME
part.  This is for the internal use, you should never modify the value.")
Gerd Moellmann's avatar
Gerd Moellmann committed
199 200 201

(defvar mml-buffer-list nil)

202
(defun mml-generate-new-buffer (name)
Gerd Moellmann's avatar
Gerd Moellmann committed
203 204 205 206 207 208
  (let ((buf (generate-new-buffer name)))
    (push buf mml-buffer-list)
    buf))

(defun mml-destroy-buffers ()
  (let (kill-buffer-hook)
209
    (mapc 'kill-buffer mml-buffer-list)
Gerd Moellmann's avatar
Gerd Moellmann committed
210 211 212 213
    (setq mml-buffer-list nil)))

(defun mml-parse ()
  "Parse the current buffer as an MML document."
214 215
  (save-excursion
    (goto-char (point-min))
216 217
    (with-syntax-table mml-syntax-table
      (mml-parse-1))))
Gerd Moellmann's avatar
Gerd Moellmann committed
218 219 220 221 222 223 224

(defun mml-parse-1 ()
  "Parse the current buffer as an MML document."
  (let (struct tag point contents charsets warn use-ascii no-markup-p raw)
    (while (and (not (eobp))
		(not (looking-at "<#/multipart")))
      (cond
225 226 227 228 229 230 231
       ((looking-at "<#secure")
	;; The secure part is essentially a meta-meta tag, which
	;; expands to either a part tag if there are no other parts in
	;; the document or a multipart tag if there are other parts
	;; included in the message
	(let* (secure-mode
	       (taginfo (mml-read-tag))
232
	       (keyfile (cdr (assq 'keyfile taginfo)))
233 234 235 236
	       (certfiles (delq nil (mapcar (lambda (tag)
					      (if (eq (car-safe tag) 'certfile)
						  (cdr tag)))
					    taginfo)))
237 238 239 240 241 242 243
	       (recipients (cdr (assq 'recipients taginfo)))
	       (sender (cdr (assq 'sender taginfo)))
	       (location (cdr (assq 'tag-location taginfo)))
	       (mode (cdr (assq 'mode taginfo)))
	       (method (cdr (assq 'method taginfo)))
	       tags)
	  (save-excursion
244 245
	    (if (re-search-forward
		 "<#/?\\(multipart\\|part\\|external\\|mml\\)." nil t)
246 247 248 249 250 251 252 253 254 255 256
		(setq secure-mode "multipart")
	      (setq secure-mode "part")))
	  (save-excursion
	    (goto-char location)
	    (re-search-forward "<#secure[^\n]*>\n"))
	  (delete-region (match-beginning 0) (match-end 0))
	  (cond ((string= mode "sign")
		 (setq tags (list "sign" method)))
		((string= mode "encrypt")
		 (setq tags (list "encrypt" method)))
		((string= mode "signencrypt")
257 258 259
		 (setq tags (list "sign" method "encrypt" method)))
		(t
		 (error "Unknown secure mode %s" mode)))
260 261
	  (eval `(mml-insert-tag ,secure-mode
				 ,@tags
262 263
				 ,(if keyfile "keyfile")
				 ,keyfile
264 265 266 267
				 ,@(apply #'append
					  (mapcar (lambda (certfile)
						    (list "certfile" certfile))
						  certfiles))
268 269 270 271 272 273
				 ,(if recipients "recipients")
				 ,recipients
				 ,(if sender "sender")
				 ,sender))
	  ;; restart the parse
	  (goto-char location)))
Gerd Moellmann's avatar
Gerd Moellmann committed
274 275 276 277 278 279 280 281 282 283 284 285 286 287 288
       ((looking-at "<#multipart")
	(push (nconc (mml-read-tag) (mml-parse-1)) struct))
       ((looking-at "<#external")
	(push (nconc (mml-read-tag) (list (cons 'contents (mml-read-part))))
	      struct))
       (t
	(if (or (looking-at "<#part") (looking-at "<#mml"))
	    (setq tag (mml-read-tag)
		  no-markup-p nil
		  warn nil)
	  (setq tag (list 'part '(type . "text/plain"))
		no-markup-p t
		warn t))
	(setq raw (cdr (assq 'raw tag))
	      point (point)
Dave Love's avatar
Dave Love committed
289
	      contents (mml-read-part (eq 'mml (car tag)))
290 291 292 293 294 295
	      charsets (cond
			(raw nil)
			((assq 'charset tag)
			 (list
			  (intern (downcase (cdr (assq 'charset tag))))))
			(t
296 297
			 (mm-find-mime-charset-region point (point)
						      mm-hack-charsets))))
Gerd Moellmann's avatar
Gerd Moellmann committed
298 299
	(when (and (not raw) (memq nil charsets))
	  (if (or (memq 'unknown-encoding mml-confirmation-set)
300 301 302 303
		  (message-options-get 'unknown-encoding)
		  (and (y-or-n-p "\
Message contains characters with unknown encoding.  Really send? ")
		       (message-options-set 'unknown-encoding t)))
304
	      (if (setq use-ascii
Gerd Moellmann's avatar
Gerd Moellmann committed
305
			(or (memq 'use-ascii mml-confirmation-set)
306 307 308
			    (message-options-get 'use-ascii)
			    (and (y-or-n-p "Use ASCII as charset? ")
				 (message-options-set 'use-ascii t))))
Gerd Moellmann's avatar
Gerd Moellmann committed
309 310 311 312 313 314 315 316 317 318 319 320 321 322 323
		  (setq charsets (delq nil charsets))
		(setq warn nil))
	    (error "Edit your message to remove those characters")))
	(if (or raw
		(eq 'mml (car tag))
		(< (length charsets) 2))
	    (if (or (not no-markup-p)
		    (string-match "[^ \t\r\n]" contents))
		;; Don't create blank parts.
		(push (nconc tag (list (cons 'contents contents)))
		      struct))
	  (let ((nstruct (mml-parse-singlepart-with-multiple-charsets
			  tag point (point) use-ascii)))
	    (when (and warn
		       (not (memq 'multipart mml-confirmation-set))
324 325
		       (not (message-options-get 'multipart))
		       (not (and (y-or-n-p (format "\
326
A message part needs to be split into %d charset parts.  Really send? "
327 328
						   (length nstruct)))
				 (message-options-set 'multipart t))))
Gerd Moellmann's avatar
Gerd Moellmann committed
329 330 331 332 333 334
	      (error "Edit your message to use only one charset"))
	    (setq struct (nconc nstruct struct)))))))
    (unless (eobp)
      (forward-line 1))
    (nreverse struct)))

335
(defun mml-parse-singlepart-with-multiple-charsets
Gerd Moellmann's avatar
Gerd Moellmann committed
336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394
  (orig-tag beg end &optional use-ascii)
  (save-excursion
    (save-restriction
      (narrow-to-region beg end)
      (goto-char (point-min))
      (let ((current (or (mm-mime-charset (mm-charset-after))
			 (and use-ascii 'us-ascii)))
	    charset struct space newline paragraph)
	(while (not (eobp))
	  (setq charset (mm-mime-charset (mm-charset-after)))
	  (cond
	   ;; The charset remains the same.
	   ((eq charset 'us-ascii))
	   ((or (and use-ascii (not charset))
		(eq charset current))
	    (setq space nil
		  newline nil
		  paragraph nil))
	   ;; The initial charset was ascii.
	   ((eq current 'us-ascii)
	    (setq current charset
		  space nil
		  newline nil
		  paragraph nil))
	   ;; We have a change in charsets.
	   (t
	    (push (append
		   orig-tag
		   (list (cons 'contents
			       (buffer-substring-no-properties
				beg (or paragraph newline space (point))))))
		  struct)
	    (setq beg (or paragraph newline space (point))
		  current charset
		  space nil
		  newline nil
		  paragraph nil)))
	  ;; Compute places where it might be nice to break the part.
	  (cond
	   ((memq (following-char) '(?  ?\t))
	    (setq space (1+ (point))))
	   ((and (eq (following-char) ?\n)
		 (not (bobp))
		 (eq (char-after (1- (point))) ?\n))
	    (setq paragraph (point)))
	   ((eq (following-char) ?\n)
	    (setq newline (1+ (point)))))
	  (forward-char 1))
	;; Do the final part.
	(unless (= beg (point))
	  (push (append orig-tag
			(list (cons 'contents
				    (buffer-substring-no-properties
				     beg (point)))))
		struct))
	struct))))

(defun mml-read-tag ()
  "Read a tag and return the contents."
395 396
  (let ((orig-point (point))
	contents name elem val)
Gerd Moellmann's avatar
Gerd Moellmann committed
397 398 399 400
    (forward-char 2)
    (setq name (buffer-substring-no-properties
		(point) (progn (forward-sexp 1) (point))))
    (skip-chars-forward " \t\n")
401
    (while (not (looking-at ">[ \t]*\n?"))
Gerd Moellmann's avatar
Gerd Moellmann committed
402 403 404 405 406
      (setq elem (buffer-substring-no-properties
		  (point) (progn (forward-sexp 1) (point))))
      (skip-chars-forward "= \t\n")
      (setq val (buffer-substring-no-properties
		 (point) (progn (forward-sexp 1) (point))))
407 408
      (when (string-match "\\`\"" val)
	(setq val (read val))) ;; inverse of prin1 in mml-insert-tag
Gerd Moellmann's avatar
Gerd Moellmann committed
409 410
      (push (cons (intern elem) val) contents)
      (skip-chars-forward " \t\n"))
411 412 413 414 415
    (goto-char (match-end 0))
    ;; Don't skip the leading space.
    ;;(skip-chars-forward " \t\n")
    ;; Put the tag location into the returned contents
    (setq contents (append (list (cons 'tag-location orig-point)) contents))
Gerd Moellmann's avatar
Gerd Moellmann committed
416 417
    (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))
420 421 422 423 424 425 426 427 428 429 430 431 432
	(bufstart start)
	tmp)
    ;; Copy over all hard newlines.
    (while (setq tmp (text-property-any start end 'hard t))
      (put-text-property (- tmp bufstart) (- tmp bufstart -1)
			 'hard t str)
      (setq start (1+ tmp)))
    ;; Copy over all `display' properties (which are usually images).
    (setq start bufstart)
    (while (setq tmp (text-property-not-all start end 'display nil))
      (put-text-property (- tmp bufstart) (- tmp bufstart -1)
			 'display (get-text-property tmp 'display)
			 str)
433 434 435
      (setq start (1+ tmp)))
    str))

Gerd Moellmann's avatar
Gerd Moellmann committed
436 437 438 439
(defun mml-read-part (&optional mml)
  "Return the buffer up till the next part, multipart or closing part or multipart.
If MML is non-nil, return the buffer up till the correspondent mml tag."
  (let ((beg (point)) (count 1))
440
    ;; If the tag ended at the end of the line, we go to the next line.
Gerd Moellmann's avatar
Gerd Moellmann committed
441 442 443 444 445 446 447 448
    (when (looking-at "[ \t]*\n")
      (forward-line 1))
    (if mml
	(progn
	  (while (and (> count 0) (not (eobp)))
	    (if (re-search-forward "<#\\(/\\)?mml." nil t)
		(setq count (+ count (if (match-beginning 1) -1 1)))
	      (goto-char (point-max))))
449
	  (mml-buffer-substring-no-properties-except-some
450 451 452
	   beg (if (> count 0)
		   (point)
		 (match-beginning 0))))
Gerd Moellmann's avatar
Gerd Moellmann committed
453 454 455
      (if (re-search-forward
	   "<#\\(/\\)?\\(multipart\\|part\\|external\\|mml\\)." nil t)
	  (prog1
456
	      (mml-buffer-substring-no-properties-except-some
457
	       beg (match-beginning 0))
Gerd Moellmann's avatar
Gerd Moellmann committed
458 459 460 461 462
	    (if (or (not (match-beginning 1))
		    (equal (match-string 2) "multipart"))
		(goto-char (match-beginning 0))
	      (when (looking-at "[ \t]*\n")
		(forward-line 1))))
463
	(mml-buffer-substring-no-properties-except-some
464
	 beg (goto-char (point-max)))))))
Gerd Moellmann's avatar
Gerd Moellmann committed
465 466 467 468

(defvar mml-boundary nil)
(defvar mml-base-boundary "-=-=")
(defvar mml-multipart-number 0)
469
(defvar mml-inhibit-compute-boundary nil)
Gerd Moellmann's avatar
Gerd Moellmann committed
470

Gnus developers's avatar
Gnus developers committed
471
(declare-function libxml-parse-html-region "xml.c"
472
		  (start end &optional base-url discard-comments))
Gnus developers's avatar
Gnus developers committed
473

474 475 476 477
(defun mml-generate-mime (&optional multipart-type)
  "Generate a MIME message based on the current MML document.
MULTIPART-TYPE defaults to \"mixed\", but can also
be \"related\" or \"alternate\"."
Gerd Moellmann's avatar
Gerd Moellmann committed
478
  (let ((cont (mml-parse))
479 480
	(mml-multipart-number mml-multipart-number)
	(options message-options))
Gerd Moellmann's avatar
Gerd Moellmann committed
481 482
    (if (not cont)
	nil
Gnus developers's avatar
Gnus developers committed
483 484 485 486 487
      (when (and (consp (car cont))
		 (= (length cont) 1)
		 (fboundp 'libxml-parse-html-region)
		 (equal (cdr (assq 'type (car cont))) "text/html"))
	(setq cont (mml-expand-html-into-multipart-related (car cont))))
488
      (prog1
489 490
	  (with-temp-buffer
	    (set-buffer-multibyte nil)
491
	    (setq message-options options)
Gnus developers's avatar
Gnus developers committed
492 493 494 495 496 497 498
	    (cond
	     ((and (consp (car cont))
		   (= (length cont) 1))
	      (mml-generate-mime-1 (car cont)))
	     ((eq (car cont) 'multipart)
	      (mml-generate-mime-1 cont))
	     (t
499 500
	      (mml-generate-mime-1
	       (nconc (list 'multipart (cons 'type (or multipart-type "mixed")))
Gnus developers's avatar
Gnus developers committed
501
		      cont))))
502 503 504
	    (setq options message-options)
	    (buffer-string))
	(setq message-options options)))))
Gerd Moellmann's avatar
Gerd Moellmann committed
505

Gnus developers's avatar
Gnus developers committed
506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528
(defun mml-expand-html-into-multipart-related (cont)
  (let ((new-parts nil)
	(cid 1))
    (mm-with-multibyte-buffer
      (insert (cdr (assq 'contents cont)))
      (goto-char (point-min))
      (with-syntax-table mml-syntax-table
	(while (re-search-forward "<img\\b" nil t)
	  (goto-char (match-beginning 0))
	  (let* ((start (point))
		 (img (nth 2
			   (nth 2
				(libxml-parse-html-region
				 (point) (progn (forward-sexp) (point))))))
		 (end (point))
		 (parsed (url-generic-parse-url (cdr (assq 'src (cadr img))))))
	    (when (and (null (url-type parsed))
		       (url-filename parsed)
		       (file-exists-p (url-filename parsed)))
	      (goto-char start)
	      (when (search-forward (url-filename parsed) end t)
		(let ((cid (format "fsf.%d" cid)))
		  (replace-match (concat "cid:" cid) t t)
529 530 531
		  (push (list cid (url-filename parsed)
			      (get-text-property start 'display))
			new-parts))
Gnus developers's avatar
Gnus developers committed
532 533 534 535 536 537 538 539 540 541 542 543
		(setq cid (1+ cid)))))))
      ;; We have local images that we want to include.
      (if (not new-parts)
	  (list cont)
	(setcdr (assq 'contents cont) (buffer-string))
	(setq cont
	      (nconc (list 'multipart (cons 'type "related"))
		     (list cont)))
	(dolist (new-part (nreverse new-parts))
	  (setq cont
		(nconc cont
		       (list `(part (type . "image/png")
544 545 546
				    ,@(mml--possibly-alter-image
				       (nth 1 new-part)
				       (nth 2 new-part))
Gnus developers's avatar
Gnus developers committed
547 548 549 550
				    (id . ,(concat "<" (nth 0 new-part)
						   ">")))))))
	cont))))

551 552 553
(autoload 'image-property "image")

;; FIXME presumably (built-in) ImageMagick could replace exiftool?
554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581
(defun mml--possibly-alter-image (file-name image)
  (if (or (null image)
	  (not (consp image))
	  (not (eq (car image) 'image))
	  (not (image-property image :rotation))
	  (not (executable-find "exiftool")))
      `((filename . ,file-name))
    `((filename . ,file-name)
      (buffer
       .
       ,(with-current-buffer (mml-generate-new-buffer " *mml rotation*")
	  (set-buffer-multibyte nil)
	  (call-process "exiftool"
			file-name
			(list (current-buffer) nil)
			nil
			(format "-Orientation#=%d"
				(cl-case (truncate
					  (image-property image :rotation))
				  (0 0)
				  (90 6)
				  (180 3)
				  (270 8)
				  (otherwise 0)))
			"-o" "-"
			"-")
	  (current-buffer))))))

Gerd Moellmann's avatar
Gerd Moellmann committed
582
(defun mml-generate-mime-1 (cont)
583 584 585 586 587 588 589
  (let ((mm-use-ultra-safe-encoding
	 (or mm-use-ultra-safe-encoding (assq 'sign cont))))
    (save-restriction
      (narrow-to-region (point) (point))
      (mml-tweak-part cont)
      (cond
       ((or (eq (car cont) 'part) (eq (car cont) 'mml))
590 591 592
	(let* ((raw (cdr (assq 'raw cont)))
	       (filename (cdr (assq 'filename cont)))
	       (type (or (cdr (assq 'type cont))
593 594 595 596
			 (if filename
			     (or (mm-default-file-encoding filename)
				 "application/octet-stream")
			   "text/plain")))
597 598 599 600 601 602 603
	       (charset (cdr (assq 'charset cont)))
	       (coding (mm-charset-to-coding-system charset))
	       encoding flowed coded)
	  (cond ((eq coding 'ascii)
		 (setq charset nil
		       coding nil))
		(charset
Miles Bader's avatar
Miles Bader committed
604 605 606 607 608 609
		 ;; The value of `charset' might be a bogus alias that
		 ;; `mm-charset-synonym-alist' provides, like `utf8',
		 ;; so we prefer the MIME charset that Emacs knows for
		 ;; the coding system `coding'.
		 (setq charset (or (mm-coding-system-to-mime-charset coding)
				   (intern (downcase charset))))))
610 611 612 613
	  (if (and (not raw)
		   (member (car (split-string type "/")) '("text" "message")))
	      (progn
		(with-temp-buffer
614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633
		  (cond
		   ((cdr (assq 'buffer cont))
		    (insert-buffer-substring (cdr (assq 'buffer cont))))
		   ((and filename
			 (not (equal (cdr (assq 'nofile cont)) "yes")))
		    (let ((coding-system-for-read coding))
		      (mm-insert-file-contents filename)))
		   ((eq 'mml (car cont))
		    (insert (cdr (assq 'contents cont))))
		   (t
		    (save-restriction
		      (narrow-to-region (point) (point))
		      (insert (cdr (assq 'contents cont)))
		      ;; Remove quotes from quoted tags.
		      (goto-char (point-min))
		      (while (re-search-forward
			      "<#!+/?\\(part\\|multipart\\|external\\|mml\\|secure\\)"
			      nil t)
			(delete-region (+ (match-beginning 0) 2)
				       (+ (match-beginning 0) 3))))))
634 635 636
		  (cond
		   ((eq (car cont) 'mml)
		    (let ((mml-boundary (mml-compute-boundary cont))
637 638 639 640
			  ;; It is necessary for the case where this
			  ;; function is called recursively since
			  ;; `m-g-d-t' will be bound to "message/rfc822"
			  ;; when encoding an article to be forwarded.
641
			  (mml-generate-default-type "text/plain"))
Katsumi Yamaoka's avatar
Katsumi Yamaoka committed
642 643 644
		      (mml-to-mime)
		      ;; Update handle so mml-compute-boundary can
		      ;; detect collisions with the nested parts.
645 646
		      (unless mml-inhibit-compute-boundary
			(setcdr (assoc 'contents cont) (buffer-string))))
647 648 649 650 651 652 653 654 655 656 657 658 659
		    (let ((mm-7bit-chars (concat mm-7bit-chars "\x1b")))
		      ;; ignore 0x1b, it is part of iso-2022-jp
		      (setq encoding (mm-body-7-or-8))))
		   ((string= (car (split-string type "/")) "message")
		    (let ((mm-7bit-chars (concat mm-7bit-chars "\x1b")))
		      ;; ignore 0x1b, it is part of iso-2022-jp
		      (setq encoding (mm-body-7-or-8))))
		   (t
		    ;; Only perform format=flowed filling on text/plain
		    ;; parts where there either isn't a format parameter
		    ;; in the mml tag or it says "flowed" and there
		    ;; actually are hard newlines in the text.
		    (let (use-hard-newlines)
660
		      (when (and mml-enable-flowed
661
				 (string= type "text/plain")
662
				 (not (string= (cdr (assq 'sign cont)) "pgp"))
663 664 665 666 667 668 669 670 671 672 673
				 (or (null (assq 'format cont))
				     (string= (cdr (assq 'format cont))
					      "flowed"))
				 (setq use-hard-newlines
				       (text-property-any
					(point-min) (point-max) 'hard 't)))
			(fill-flowed-encode)
			;; Indicate that `mml-insert-mime-headers' should
			;; insert a "; format=flowed" string unless the
			;; user has already specified it.
			(setq flowed (null (assq 'format cont)))))
674 675 676 677 678 679 680
		    ;; Prefer `utf-8' for text/calendar parts.
		    (if (or charset
			    (not (string= type "text/calendar")))
			(setq charset (mm-encode-body charset))
		      (let ((mm-coding-system-priorities
			     (cons 'utf-8 mm-coding-system-priorities)))
			(setq charset (mm-encode-body))))
681 682 683 684 685 686
		    (setq encoding (mm-body-encoding
				    charset (cdr (assq 'encoding cont))))))
		  (setq coded (buffer-string)))
		(mml-insert-mime-headers cont type charset encoding flowed)
		(insert "\n")
		(insert coded))
687 688
	    (with-temp-buffer
	      (set-buffer-multibyte nil)
689 690
	      (cond
	       ((cdr (assq 'buffer cont))
691 692 693 694
		;; multibyte string that inserted to a unibyte buffer
		;; will be converted to the unibyte version safely.
		(insert (with-current-buffer (cdr (assq 'buffer cont))
			  (buffer-string))))
695
	       ((and filename
696 697
		     (not (equal (cdr (assq 'nofile cont)) "yes")))
		(let ((coding-system-for-read mm-binary-coding-system))
698 699 700 701 702
		  (mm-insert-file-contents filename nil nil nil nil t))
		(unless charset
		  (setq charset (mm-coding-system-to-mime-charset
				 (mm-find-buffer-file-coding-system
				  filename)))))
703
	       (t
704
		(let ((contents (cdr (assq 'contents cont))))
705
		  (if (multibyte-string-p contents)
706
		      (progn
707
			(set-buffer-multibyte t)
708
			(insert contents)
Miles Bader's avatar
Miles Bader committed
709
			(unless raw
710
			  (setq charset	(mm-encode-body charset))))
711
		    (insert contents)))))
712 713
	      (if (setq encoding (cdr (assq 'encoding cont)))
		  (setq encoding (intern (downcase encoding))))
714 715
	      (setq encoding (mm-encode-buffer type encoding))
	      (setq coded (decode-coding-string (buffer-string) 'us-ascii)))
716
	    (mml-insert-mime-headers cont type charset encoding nil)
Miles Bader's avatar
Miles Bader committed
717
	    (insert "\n" coded))))
718 719 720 721 722 723 724 725 726 727 728 729
       ((eq (car cont) 'external)
	(insert "Content-Type: message/external-body")
	(let ((parameters (mml-parameter-string
			   cont '(expiration size permission)))
	      (name (cdr (assq 'name cont)))
	      (url (cdr (assq 'url cont))))
	  (when name
	    (setq name (mml-parse-file-name name))
	    (if (stringp name)
		(mml-insert-parameter
		 (mail-header-encode-parameter "name" name)
		 "access-type=local-file")
Gerd Moellmann's avatar
Gerd Moellmann committed
730
	      (mml-insert-parameter
731 732 733 734 735 736 737 738 739 740 741
	       (mail-header-encode-parameter
		"name" (file-name-nondirectory (nth 2 name)))
	       (mail-header-encode-parameter "site" (nth 1 name))
	       (mail-header-encode-parameter
		"directory" (file-name-directory (nth 2 name))))
	      (mml-insert-parameter
	       (concat "access-type="
		       (if (member (nth 0 name) '("ftp@" "anonymous@"))
			   "anon-ftp"
			 "ftp")))))
	  (when url
Gerd Moellmann's avatar
Gerd Moellmann committed
742
	    (mml-insert-parameter
743 744 745 746
	     (mail-header-encode-parameter "url" url)
	     "access-type=url"))
	  (when parameters
	    (mml-insert-parameter-string
747 748 749 750
	     cont '(expiration size permission)))
	  (insert "\n\n")
	  (insert "Content-Type: "
		  (or (cdr (assq 'type cont))
751 752 753 754
		      (if name
			  (or (mm-default-file-encoding name)
			      "application/octet-stream")
			"text/plain"))
755 756 757 758 759 760 761
		  "\n")
	  (insert "Content-ID: " (message-make-message-id) "\n")
	  (insert "Content-Transfer-Encoding: "
		  (or (cdr (assq 'encoding cont)) "binary"))
	  (insert "\n\n")
	  (insert (or (cdr (assq 'contents cont))))
	  (insert "\n")))
762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781
       ((eq (car cont) 'multipart)
	(let* ((type (or (cdr (assq 'type cont)) "mixed"))
	       (mml-generate-default-type (if (equal type "digest")
					      "message/rfc822"
					    "text/plain"))
	       (handler (assoc type mml-generate-multipart-alist)))
	  (if handler
	      (funcall (cdr handler) cont)
	    ;; No specific handler.  Use default one.
	    (let ((mml-boundary (mml-compute-boundary cont)))
	      (insert (format "Content-Type: multipart/%s; boundary=\"%s\""
			      type mml-boundary)
		      (if (cdr (assq 'start cont))
			  (format "; start=\"%s\"\n" (cdr (assq 'start cont)))
			"\n"))
	      (let ((cont cont) part)
		(while (setq part (pop cont))
		  ;; Skip `multipart' and attributes.
		  (when (and (consp part) (consp (cdr part)))
		    (insert "\n--" mml-boundary "\n")
782 783
		    (mml-generate-mime-1 part)
		    (goto-char (point-max)))))
784 785 786 787 788 789 790 791 792 793 794 795 796 797
	      (insert "\n--" mml-boundary "--\n")))))
       (t
	(error "Invalid element: %S" cont)))
      ;; handle sign & encrypt tags in a semi-smart way.
      (let ((sign-item (assoc (cdr (assq 'sign cont)) mml-sign-alist))
	    (encrypt-item (assoc (cdr (assq 'encrypt cont))
				 mml-encrypt-alist))
	    sender recipients)
	(when (or sign-item encrypt-item)
	  (when (setq sender (cdr (assq 'sender cont)))
	    (message-options-set 'mml-sender sender)
	    (message-options-set 'message-sender sender))
	  (if (setq recipients (cdr (assq 'recipients cont)))
	      (message-options-set 'message-recipients recipients))
798
	  (let ((style (mml-signencrypt-style
Glenn Morris's avatar
Glenn Morris committed
799
			(car (or sign-item encrypt-item)))))
800 801 802
	    ;; check if: we're both signing & encrypting, both methods
	    ;; are the same (why would they be different?!), and that
	    ;; the signencrypt style allows for combined operation.
Glenn Morris's avatar
Glenn Morris committed
803 804
	    (if (and sign-item encrypt-item (equal (car sign-item)
						   (car encrypt-item))
805 806 807 808 809 810 811
		     (equal style 'combined))
		(funcall (nth 1 encrypt-item) cont t)
	      ;; otherwise, revert to the old behavior.
	      (when sign-item
		(funcall (nth 1 sign-item) cont))
	      (when encrypt-item
		(funcall (nth 1 encrypt-item) cont)))))))))
Gerd Moellmann's avatar
Gerd Moellmann committed
812 813 814 815

(defun mml-compute-boundary (cont)
  "Return a unique boundary that does not exist in CONT."
  (let ((mml-boundary (funcall mml-boundary-function
Glenn Morris's avatar
Glenn Morris committed
816
			       (cl-incf mml-multipart-number))))
817 818 819 820 821
    (unless mml-inhibit-compute-boundary
      ;; This function tries again and again until it has found
      ;; a unique boundary.
      (while (not (catch 'not-unique
		    (mml-compute-boundary-1 cont)))))
Gerd Moellmann's avatar
Gerd Moellmann committed
822 823 824
    mml-boundary))

(defun mml-compute-boundary-1 (cont)
825 826 827 828 829 830 831 832 833 834 835
  (cond
   ((member (car cont) '(part mml))
    (mm-with-multibyte-buffer
      (let ((mml-inhibit-compute-boundary t)
	    (mml-multipart-number 0)
	    mml-sign-alist mml-encrypt-alist)
	(mml-generate-mime-1 cont))
      (goto-char (point-min))
      (when (re-search-forward (concat "^--" (regexp-quote mml-boundary))
			       nil t)
	(setq mml-boundary (funcall mml-boundary-function
Glenn Morris's avatar
Glenn Morris committed
836
				    (cl-incf mml-multipart-number)))
837 838 839 840
	(throw 'not-unique nil))))
   ((eq (car cont) 'multipart)
    (mapc 'mml-compute-boundary-1 (cddr cont))))
  t)
Gerd Moellmann's avatar
Gerd Moellmann committed
841 842 843 844 845 846 847 848

(defun mml-make-boundary (number)
  (concat (make-string (% number 60) ?=)
	  (if (> number 17)
	      (format "%x" number)
	    "")
	  mml-base-boundary))

849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872
(defun mml-content-disposition (type &optional filename)
  "Return a default disposition name suitable to TYPE or FILENAME."
  (let ((defs mml-content-disposition-alist)
	disposition def types)
    (while (and (not disposition) defs)
      (setq def (pop defs))
      (cond ((stringp (car def))
	     (when (and filename
			(string-match (car def) filename))
	       (setq disposition (cdr def))))
	    ((consp (cdr def))
	     (when (string= (car (setq types (split-string type "/")))
			    (car def))
	       (setq type (cadr types)
		     types (cdr def))
	       (while (and (not disposition) types)
		 (setq def (pop types))
		 (when (or (eq (car def) t) (string= type (car def)))
		   (setq disposition (cdr def))))))
	    (t
	     (when (or (eq (car def) t) (string= type (car def)))
	       (setq disposition (cdr def))))))
    (or disposition "attachment")))

873 874
(defun mml-insert-mime-headers (cont type charset encoding flowed)
  (let (parameters id disposition description)
Gerd Moellmann's avatar
Gerd Moellmann committed
875 876
    (setq parameters
	  (mml-parameter-string
877
	   cont mml-content-type-parameters))
Gerd Moellmann's avatar
Gerd Moellmann committed
878 879
    (when (or charset
	      parameters
880 881 882
	      flowed
	      (not (equal type mml-generate-default-type))
	      mml-insert-mime-headers-always)
Gerd Moellmann's avatar
Gerd Moellmann committed
883 884
      (when (consp charset)
	(error
885
	 "Can't encode a part with several charsets"))
Gerd Moellmann's avatar
Gerd Moellmann committed
886 887
      (insert "Content-Type: " type)
      (when charset
888 889
	(mml-insert-parameter
	 (mail-header-encode-parameter "charset" (symbol-name charset))))
890
      (when flowed
891
	(mml-insert-parameter "format=flowed"))
Gerd Moellmann's avatar
Gerd Moellmann committed
892 893
      (when parameters
	(mml-insert-parameter-string
894
	 cont mml-content-type-parameters))
Gerd Moellmann's avatar
Gerd Moellmann committed
895
      (insert "\n"))
896 897
    (when (setq id (cdr (assq 'id cont)))
      (insert "Content-ID: " id "\n"))
Gerd Moellmann's avatar
Gerd Moellmann committed
898 899
    (setq parameters
	  (mml-parameter-string
900
	   cont mml-content-disposition-parameters))
Gerd Moellmann's avatar
Gerd Moellmann committed
901 902
    (when (or (setq disposition (cdr (assq 'disposition cont)))
	      parameters)
903 904 905
      (insert "Content-Disposition: "
	      (or disposition
		  (mml-content-disposition type (cdr (assq 'filename cont)))))
Gerd Moellmann's avatar
Gerd Moellmann committed
906
      (when parameters
907 908 909 910 911 912 913 914
	(let ((cont (copy-sequence cont)))
	  ;; Set the file name to what's specified by the user.
	  (when-let ((recipient-filename (cdr (assq 'recipient-filename cont))))
	    (setcdr cont
		    (cons (cons 'filename recipient-filename)
			  (cdr cont))))
	  (mml-insert-parameter-string
	   cont mml-content-disposition-parameters)))
Gerd Moellmann's avatar
Gerd Moellmann committed
915 916 917 918
      (insert "\n"))
    (unless (eq encoding '7bit)
      (insert (format "Content-Transfer-Encoding: %s\n" encoding)))
    (when (setq description (cdr (assq 'description cont)))
919 920 921 922 923
      (insert "Content-Description: ")
      (setq description (prog1
			    (point)
			  (insert description "\n")))
      (mail-encode-encoded-word-region description (point)))))
Gerd Moellmann's avatar
Gerd Moellmann committed
924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949

(defun mml-parameter-string (cont types)
  (let ((string "")
	value type)
    (while (setq type (pop types))
      (when (setq value (cdr (assq type cont)))
	;; Strip directory component from the filename parameter.
	(when (eq type 'filename)
	  (setq value (file-name-nondirectory value)))
	(setq string (concat string "; "
			     (mail-header-encode-parameter
			      (symbol-name type) value)))))
    (when (not (zerop (length string)))
      string)))

(defun mml-insert-parameter-string (cont types)
  (let (value type)
    (while (setq type (pop types))
      (when (setq value (cdr (assq type cont)))
	;; Strip directory component from the filename parameter.
	(when (eq type 'filename)
	  (setq value (file-name-nondirectory value)))
	(mml-insert-parameter
	 (mail-header-encode-parameter
	  (symbol-name type) value))))))

Dan Nicolaescu's avatar
Dan Nicolaescu committed
950 951 952
(defvar ange-ftp-name-format)
(defvar efs-path-regexp)

Gerd Moellmann's avatar
Gerd Moellmann committed
953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973
(defun mml-parse-file-name (path)
  (if (if (boundp 'efs-path-regexp)
	  (string-match efs-path-regexp path)
	(if (boundp 'ange-ftp-name-format)
	    (string-match (car ange-ftp-name-format) path)))
      (list (match-string 1 path) (match-string 2 path)
	    (substring path (1+ (match-end 2))))
    path))

(defun mml-insert-buffer (buffer)
  "Insert BUFFER at point and quote any MML markup."
  (save-restriction
    (narrow-to-region (point) (point))
    (insert-buffer-substring buffer)
    (mml-quote-region (point-min) (point-max))
    (goto-char (point-max))))

;;;
;;; Transforming MIME to MML
;;;

974 975 976 977
;; message-narrow-to-head autoloads message.
(declare-function message-remove-header "message"
                  (header &optional is-regexp first reverse))

978 979 980
(defun mime-to-mml (&optional handles)
  "Translate the current buffer (which should be a message) into MML.
If HANDLES is non-nil, use it instead reparsing the buffer."
Gerd Moellmann's avatar
Gerd Moellmann committed
981 982 983
  ;; First decode the head.
  (save-restriction
    (message-narrow-to-head)
984 985
    (let ((rfc2047-quote-decoded-words-containing-tspecials t))
      (mail-decode-encoded-word-region (point-min) (point-max))))
986 987 988
  (unless handles
    (setq handles (mm-dissect-buffer t)))
  (goto-char (point-min))
989 990 991 992
  (if (search-forward "\n\n" nil 'move)
      (delete-region (point) (point-max))
    ;; No content in the part that is the sole part of this message.
    (insert (if (bolp) "\n" "\n\n")))
993 994 995 996
  (if (stringp (car handles))
      (mml-insert-mime handles)
    (mml-insert-mime handles t))
  (mm-destroy-parts handles)
Gerd Moellmann's avatar
Gerd Moellmann committed
997 998 999 1000 1001
  (save-restriction
    (message-narrow-to-head)
    ;; Remove them, they are confusing.
    (message-remove-header "Content-Type")
    (message-remove-header "MIME-Version")
1002
    (message-remove-header "Content-Disposition")
Gerd Moellmann's avatar
Gerd Moellmann committed
1003 1004
    (message-remove-header "Content-Transfer-Encoding")))

1005 1006 1007
(autoload 'message-encode-message-body "message")
(declare-function message-narrow-to-headers-or-head "message" ())

1008
;;;###autoload
Gerd Moellmann's avatar
Gerd Moellmann committed
1009 1010
(defun mml-to-mime ()
  "Translate the current buffer from MML to MIME."
Miles Bader's avatar
Miles Bader committed
1011 1012 1013 1014 1015
  ;; `message-encode-message-body' will insert an encoded Content-Description
  ;; header in the message header if the body contains a single part
  ;; that is specified by a user with a MML tag containing a description
  ;; token.  So, we encode the message header first to prevent the encoded
  ;; Content-Description header from being encoded again.
Gerd Moellmann's avatar
Gerd Moellmann committed
1016 1017
  (save-restriction
    (message-narrow-to-headers-or-head)
1018 1019 1020
    ;; Skip past any From_ headers.
    (while (looking-at "From ")
      (forward-line 1))
1021
    (mail-encode-encoded-word-buffer))
Miles Bader's avatar
Miles Bader committed
1022
  (message-encode-message-body))
Gerd Moellmann's avatar
Gerd Moellmann committed
1023 1024 1025 1026 1027 1028

(defun mml-insert-mime (handle &optional no-markup)
  (let (textp buffer mmlp)
    ;; Determine type and stuff.
    (unless (stringp (car handle))
      (unless (setq textp (equal (mm-handle-media-supertype handle) "text"))
1029
	(with-current-buffer (setq buffer (mml-generate-new-buffer " *mml*"))
Miles Bader's avatar
Miles Bader committed
1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040
	  (if (eq (mail-content-type-get (mm-handle-type handle) 'charset)
		  'gnus-decoded)
	      ;; A part that mm-uu dissected from a non-MIME message
	      ;; because of `gnus-article-emulate-mime'.
	      (progn
		(mm-enable-multibyte)
		(insert-buffer-substring (mm-handle-buffer handle)))
	    (mm-insert-part handle 'no-cache)
	    (if (setq mmlp (equal (mm-handle-media-type handle)
				  "message/rfc822"))
		(mime-to-mml))))))
Gerd Moellmann's avatar
Gerd Moellmann committed
1041 1042 1043 1044 1045 1046
    (if mmlp
	(mml-insert-mml-markup handle nil t t)
      (unless (and no-markup
		   (equal (mm-handle-media-type handle) "text/plain"))
	(mml-insert-mml-markup handle buffer textp)))
    (cond
1047
     (mmlp
1048
      (insert-buffer-substring buffer)
Gerd Moellmann's avatar
Gerd Moellmann committed
1049 1050 1051
      (goto-char (point-max))
      (insert "<#/mml>\n"))
     ((stringp (car handle))
1052
      (mapc 'mml-insert-mime (cdr handle))
Gerd Moellmann's avatar
Gerd Moellmann committed
1053 1054
      (insert "<#/multipart>\n"))
     (textp
1055 1056 1057 1058 1059 1060 1061
      (let ((charset (mail-content-type-get
		      (mm-handle-type handle) 'charset))
	    (start (point)))
	(if (eq charset 'gnus-decoded)
	    (mm-insert-part handle)
	  (insert (mm-decode-string (mm-get-part handle) charset)))
	(mml-quote-region start (point)))
Gerd Moellmann's avatar
Gerd Moellmann committed
1062 1063 1064 1065 1066 1067 1068
      (goto-char (point-max)))
     (t
      (insert "<#/part>\n")))))

(defun mml-insert-mml-markup (handle &optional buffer nofile mmlp)
  "Take a MIME handle and insert an MML tag."
  (if (stringp (car handle))
1069 1070 1071 1072 1073 1074
      (progn
	(insert "<#multipart type=" (mm-handle-media-subtype handle))
	(let ((start (mm-handle-multipart-ctl-parameter handle 'start)))
	  (when start
	    (insert " start=\"" start "\"")))
	(insert ">\n"))
Gerd Moellmann's avatar
Gerd Moellmann committed
1075 1076 1077 1078 1079
    (if mmlp
	(insert "<#mml type=" (mm-handle-media-type handle))
      (insert "<#part type=" (mm-handle-media-type handle)))
    (dolist (elem (append (cdr (mm-handle-type handle))
			  (cdr (mm-handle-disposition handle))))
1080 1081 1082 1083
      (unless (symbolp (cdr elem))
	(insert " " (symbol-name (car elem)) "=\"" (cdr elem) "\"")))
    (when (mm-handle-id handle)
      (insert " id=\"" (mm-handle-id handle) "\""))
Gerd Moellmann's avatar
Gerd Moellmann committed
1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095
    (when (mm-handle-disposition handle)
      (insert " disposition=" (car (mm-handle-disposition handle))))
    (when buffer
      (insert " buffer=\"" (buffer-name buffer) "\""))
    (when nofile
      (insert " nofile=yes"))
    (when (mm-handle-description handle)
      (insert " description=\"" (mm-handle-description handle) "\""))
    (insert ">\n")))

(defun mml-insert-parameter (&rest parameters)
  "Insert PARAMETERS in a nice way."
1096 1097 1098 1099
  (let (start end)
    (dolist (param parameters)
      (insert ";")
      (setq start (point))
Gerd Moellmann's avatar
Gerd Moellmann committed
1100
      (insert " " param)
1101 1102 1103 1104 1105 1106 1107 1108 1109
      (setq end (point))
      (goto-char start)
      (end-of-line)
      (if (> (current-column) 76)
	  (progn
	    (goto-char start)
	    (insert "\n")
	    (goto-char (1+ end)))
	(goto-char end)))))
Gerd Moellmann's avatar
Gerd Moellmann committed
1110 1111 1112 1113 1114 1115

;;;
;;; Mode for inserting and editing MML forms
;;;

(defvar mml-mode-map
1116 1117 1118 1119 1120
  (let ((sign (make-sparse-keymap))
	(encrypt (make-sparse-keymap))
	(signpart (make-sparse-keymap))
	(encryptpart (make-sparse-keymap))
	(map (make-sparse-keymap))
Gerd Moellmann's avatar
Gerd Moellmann committed
1121
	(main (make-sparse-keymap)))
1122 1123 1124 1125 1126
    (define-key map "\C-s" 'mml-secure-message-sign)
    (define-key map "\C-c" 'mml-secure-message-encrypt)
    (define-key map "\C-e" 'mml-secure-message-sign-encrypt)
    (define-key map "\C-p\C-s" 'mml-secure-sign)
    (define-key map "\C-p\C-c" 'mml-secure-encrypt)
1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139
    (define-key sign "p" 'mml-secure-message-sign-pgpmime)
    (define-key sign "o" 'mml-secure-message-sign-pgp)
    (define-key sign "s" 'mml-secure-message-sign-smime)
    (define-key signpart "p" 'mml-secure-sign-pgpmime)
    (define-key signpart "o" 'mml-secure-sign-pgp)
    (define-key signpart "s" 'mml-secure-sign-smime)
    (define-key encrypt "p" 'mml-secure-message-encrypt-pgpmime)
    (define-key encrypt "o" 'mml-secure-message-encrypt-pgp)
    (define-key encrypt "s" 'mml-secure-message-encrypt-smime)
    (define-key encryptpart "p" 'mml-secure-encrypt-pgpmime)
    (define-key encryptpart "o" 'mml-secure-encrypt-pgp)
    (define-key encryptpart "s" 'mml-secure-encrypt-smime)
    (define-key map "\C-n" 'mml-unsecure-message)
Gerd Moellmann's avatar
Gerd Moellmann committed
1140 1141 1142 1143 1144 1145 1146 1147
    (define-key map "f" 'mml-attach-file)
    (define-key map "b" 'mml-attach-buffer)
    (define-key map "e" 'mml-attach-external)
    (define-key map "q" 'mml-quote-region)
    (define-key map "m" 'mml-insert-multipart)
    (define-key map "p" 'mml-insert-part)
    (define-key map "v" 'mml-validate)
    (define-key map "P" 'mml-preview)
1148 1149 1150 1151
    (define-key map "s" sign)
    (define-key map "S" signpart)
    (define-key map "c" encrypt)
    (define-key map "C" encryptpart)
Gerd Moellmann's avatar
Gerd Moellmann committed
1152
    ;;(define-key map "n" 'mml-narrow-to-part)
1153 1154 1155
    ;; `M-m' conflicts with `back-to-indentation'.
    ;; (define-key main "\M-m" map)
    (define-key main "\C-c\C-m" map)
Gerd Moellmann's avatar
Gerd Moellmann committed
1156 1157 1158
    main))

(easy-menu-define
ShengHuo ZHU's avatar
ident.  
ShengHuo ZHU committed
1159
  mml-menu mml-mode-map ""
1160
  '("Attachments"
1161
    ["Attach File..." mml-attach-file :help "Attach a file at point"]
1162
    ["Attach Buffer..." mml-attach-buffer
1163
     :help "Attach a buffer to the outgoing message"]
1164
    ["Attach External..." mml-attach-external
1165
     :help "Attach reference to an external file"]
Miles Bader's avatar
Miles Bader committed
1166 1167 1168 1169 1170
    ;; FIXME: Is it possible to do this without using
    ;; `gnus-gcc-externalize-attachments'?
    ["Externalize Attachments"
     (lambda ()
       (interactive)
1171 1172 1173 1174 1175 1176 1177
       (setq gnus-gcc-externalize-attachments
	     (not gnus-gcc-externalize-attachments))
       (message "gnus-gcc-externalize-attachments is `%s'."
		gnus-gcc-externalize-attachments))
     :visible (and (boundp 'gnus-gcc-externalize-attachments)
		   (memq gnus-gcc-externalize-attachments
			 '(all t nil)))
Miles Bader's avatar
Miles Bader committed
1178 1179
     :style toggle
     :selected gnus-gcc-externalize-attachments
1180
     :help "Save attachments as external parts in Gcc copies"]
Miles Bader's avatar
Miles Bader committed
1181
    "----"
1182 1183 1184 1185
    ;;
    ("Change Security Method"
     ["PGP/MIME"
      (lambda () (interactive) (setq mml-secure-method "pgpmime"))
1186
      :help "Set Security Method to PGP/MIME"
1187 1188 1189 1190
      :style radio
      :selected (equal mml-secure-method "pgpmime") ]
     ["S/MIME"
      (lambda () (interactive) (setq mml-secure-method "smime"))
1191
      :help "Set Security Method to S/MIME"
1192 1193 1194 1195
      :style radio
      :selected (equal mml-secure-method "smime") ]
     ["Inline PGP"
      (lambda () (interactive) (setq mml-secure-method "pgp"))
1196
      :help "Set Security Method to inline PGP"
1197 1198 1199 1200 1201 1202 1203
      :style radio
      :selected (equal mml-secure-method "pgp") ] )
    ;;
    ["Sign Message" mml-secure-message-sign t]
    ["Encrypt Message" mml-secure-message-encrypt t]
    ["Sign and Encrypt Message" mml-secure-message-sign-encrypt t]
    ["Encrypt/Sign off" mml-unsecure-message
1204
     :help "Don't Encrypt/Sign Message"]
Miles Bader's avatar
Miles Bader committed
1205 1206 1207 1208
    ;; Do we have separate encrypt and encrypt/sign commands for parts?
    ["Sign Part" mml-secure-sign t]
    ["Encrypt Part" mml-secure-encrypt t]
    "----"
1209 1210 1211 1212 1213 1214 1215
    ;; Maybe we could remove these, because people who write MML most probably
    ;; don't use the menu:
    ["Insert Part..." mml-insert-part
     :active (message-in-body-p)]
    ["Insert Multipart..." mml-insert-multipart
     :active (message-in-body-p)]
    ;;
ShengHuo ZHU's avatar
ident.  
ShengHuo ZHU committed
1216
    ;;["Narrow" mml-narrow-to-part t]
1217 1218
    ["Quote MML in region" mml-quote-region
     :active (message-mark-active-p)
1219
     :help "Quote MML tags in region"]
1220
    ["Validate MML" mml-validate t]
1221 1222 1223
    ["Preview" mml-preview t]
    "----"
    ["Emacs MIME manual" (lambda () (interactive) (message-info 4))
1224
     :help "Display the Emacs MIME manual"]
Miles Bader's avatar
Miles Bader committed
1225
    ["PGG manual" (lambda () (interactive) (message-info mml2015-use))
1226 1227
     :visible (and (boundp 'mml2015-use) (equal mml2015-use 'pgg))
     :help "Display the PGG manual"]
1228
    ["EasyPG manual" (lambda () (interactive) (require 'mml2015) (message-info mml2015-use))
1229 1230
     :visible (and (boundp 'mml2015-use) (equal mml2015-use 'epg))
     :help "Display the EasyPG manual"]))
Gerd Moellmann's avatar
Gerd Moellmann committed
1231

1232
(define-minor-mode mml-mode
Gerd Moellmann's avatar
Gerd Moellmann committed
1233
  "Minor mode for editing MML.
1234 1235
MML is the MIME Meta Language, a minor mode for composing MIME articles.
See Info node `(emacs-mime)Composing'.
Gerd Moellmann's avatar
Gerd Moellmann committed
1236 1237

\\{mml-mode-map}"
1238 1239
  :lighter " MML" :keymap mml-mode-map
  (when mml-mode
1240 1241
    (when (boundp 'dnd-protocol-alist)
      (set (make-local-variable 'dnd-protocol-alist)
1242
	   (append mml-dnd-protocol-alist dnd-protocol-alist)))))
Gerd Moellmann's avatar
Gerd Moellmann committed
1243 1244 1245 1246 1247 1248

;;;
;;; Helper functions for reading MIME stuff from the minibuffer and
;;; inserting stuff to the buffer.
;;;

1249 1250 1251 1252
(defcustom mml-default-directory mm-default-directory
  "The default directory where mml will find files.
If not set, `default-directory' will be used."
  :type '(choice directory (const :tag "Default" nil))
1253
  :version "23.1" ;; No Gnus
1254 1255
  :group 'message)

Gerd Moellmann's avatar
Gerd Moellmann committed
1256
(defun mml-minibuffer-read-file (prompt)
1257
  (let* ((completion-ignored-extensions nil)
1258
	 (buffer-file-name nil)
1259 1260
	 (file (read-file-name prompt
			       (or mml-default-directory default-directory)
1261
			       nil t)))
1262
    ;; Prevent some common errors.  This is inspired by similar code in
Gerd Moellmann's avatar
Gerd Moellmann committed
1263 1264 1265 1266 1267 1268 1269 1270 1271
    ;; VM.
    (when (file-directory-p file)
      (error "%s is a directory, cannot attach" file))
    (unless (file-exists-p file)
      (error "No such file: %s" file))
    (unless (file-readable-p file)
      (error "Permission denied: %s" file))
    file))

1272 1273 1274
(declare-function mailcap-parse-mimetypes "mailcap" (&optional path force))
(declare-function mailcap-mime-types "mailcap" ())

Gerd Moellmann's avatar
Gerd Moellmann committed
1275
(defun mml-minibuffer-read-type (name &optional default)
1276
  (require 'mailcap)
Gerd Moellmann's avatar
Gerd Moellmann committed
1277 1278 1279 1280 1281 1282 1283
  (mailcap-parse-mimetypes)
  (let* ((default (or default
		      (mm-default-file-encoding name)
		      ;; Perhaps here we should check what the file
		      ;; looks like, and offer text/plain if it looks
		      ;; like text/plain.
		      "application/octet-stream"))
1284 1285 1286 1287
	 (string (gnus-completing-read
		  "Content type"
		  (mailcap-mime-types)
                  nil nil nil default)))
Gerd Moellmann's avatar
Gerd Moellmann committed
1288 1289 1290 1291
    (if (not (equal string ""))
	string
      default)))

1292 1293
(defun mml-minibuffer-read-description (&optional default)
  (let ((description (read-string "One line description: " default)))
Gerd Moellmann's avatar
Gerd Moellmann committed
1294 1295 1296 1297
    (when (string-match "\\`[ \t]*\\'" description)
      (setq description nil))
    description))

1298 1299 1300
(defun mml-minibuffer-read-disposition (type &optional default filename)
  (unless default
    (setq default (mml-content-disposition type filename)))
1301 1302 1303 1304