1 ;;; mm-decode.el --- Functions for decoding MIME things
3 ;; Copyright (C) 1998-2015 Free Software Foundation, Inc.
5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
6 ;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software: you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation, either version 3 of the License, or
12 ;; (at your option) any later version.
14 ;; GNU Emacs is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
28 (eval-when-compile (require 'cl
))
30 (autoload 'gnus-map-function
"gnus-util")
31 (autoload 'gnus-replace-in-string
"gnus-util")
32 (autoload 'gnus-read-shell-command
"gnus-util")
34 (autoload 'gnus-overlays-at
"gnus")
35 (autoload 'gnus-overlay-put
"gnus")
37 (autoload 'mm-inline-partial
"mm-partial")
38 (autoload 'mm-inline-external-body
"mm-extern")
39 (autoload 'mm-extern-cache-contents
"mm-extern")
40 (autoload 'mm-insert-inline
"mm-view")
42 (autoload 'mm-archive-decoders
"mm-archive")
43 (autoload 'mm-archive-dissect-and-inline
"mm-archive")
44 (autoload 'mm-dissect-archive
"mm-archive")
46 (defvar gnus-current-window-configuration
)
48 (add-hook 'gnus-exit-gnus-hook
'mm-destroy-postponed-undisplay-list
)
49 (add-hook 'gnus-exit-gnus-hook
'mm-temp-files-delete
)
51 (defgroup mime-display
()
52 "Display of MIME in mail and news articles."
53 :link
'(custom-manual "(emacs-mime)Display Customization")
59 (defgroup mime-security
()
60 "MIME security in mail and news articles."
61 :link
'(custom-manual "(emacs-mime)Display Customization")
66 (defface mm-command-output
69 (:foreground
"ForestGreen"))
75 "Face used for displaying output from commands."
78 ;;; Convenience macros.
80 (defmacro mm-handle-buffer
(handle)
82 (defmacro mm-handle-type
(handle)
84 (defsubst mm-handle-media-type
(handle)
85 (if (stringp (car handle
))
87 (car (mm-handle-type handle
))))
88 (defsubst mm-handle-media-supertype
(handle)
89 (car (split-string (mm-handle-media-type handle
) "/")))
90 (defsubst mm-handle-media-subtype
(handle)
91 (cadr (split-string (mm-handle-media-type handle
) "/")))
92 (defmacro mm-handle-encoding
(handle)
94 (defmacro mm-handle-undisplayer
(handle)
96 (defmacro mm-handle-set-undisplayer
(handle function
)
97 `(setcar (nthcdr 3 ,handle
) ,function
))
98 (defmacro mm-handle-disposition
(handle)
100 (defmacro mm-handle-description
(handle)
102 (defmacro mm-handle-cache
(handle)
104 (defmacro mm-handle-set-cache
(handle contents
)
105 `(setcar (nthcdr 6 ,handle
) ,contents
))
106 (defmacro mm-handle-id
(handle)
108 (defmacro mm-handle-multipart-original-buffer
(handle)
109 `(get-text-property 0 'buffer
(car ,handle
)))
110 (defmacro mm-handle-multipart-from
(handle)
111 `(get-text-property 0 'from
(car ,handle
)))
112 (defmacro mm-handle-multipart-ctl-parameter
(handle parameter
)
113 `(get-text-property 0 ,parameter
(car ,handle
)))
115 (defmacro mm-make-handle
(&optional buffer type encoding undisplayer
116 disposition description cache
118 `(list ,buffer
,type
,encoding
,undisplayer
119 ,disposition
,description
,cache
,id
))
121 (defcustom mm-text-html-renderer
122 (cond ((fboundp 'libxml-parse-html-region
) 'shr
)
123 ((executable-find "w3m") 'gnus-w3m
)
124 ((executable-find "links") 'links
)
125 ((executable-find "lynx") 'lynx
)
126 ((locate-library "html2text") 'html2text
)
128 "Render of HTML contents.
129 It is one of defined renderer types, or a rendering function.
130 The defined renderer types are:
131 `shr': use the built-in Gnus HTML renderer;
132 `gnus-w3m': use Gnus renderer based on w3m;
133 `w3m': use emacs-w3m;
134 `w3m-standalone': use plain w3m;
137 `html2text': use html2text;
138 nil : use external viewer (default web browser)."
140 :type
'(choice (const shr
)
142 (const w3m
:tag
"emacs-w3m")
143 (const w3m-standalone
:tag
"standalone w3m" )
147 (const nil
:tag
"External viewer")
149 :group
'mime-display
)
151 (defcustom mm-inline-text-html-with-images nil
152 "If non-nil, Gnus will allow retrieving images in HTML that has <img> tags.
153 See also the documentation for the `mm-w3m-safe-url-regexp'
157 :group
'mime-display
)
159 (defcustom mm-w3m-safe-url-regexp
"\\`cid:"
160 "Regexp matching URLs which are considered to be safe.
161 Some HTML mails might contain a nasty trick used by spammers, using
162 the <img> tag which is far more evil than the [Click Here!] button.
163 It is most likely intended to check whether the ominous spam mail has
164 reached your eyes or not, in which case the spammer knows for sure
165 that your email address is valid. It is done by embedding an
166 identifier string into a URL that you might automatically retrieve
167 when displaying the image. The default value is \"\\\\`cid:\" which only
168 matches parts embedded to the Multipart/Related type MIME contents and
169 Gnus will never connect to the spammer's site arbitrarily. You may
170 set this variable to nil if you consider all urls to be safe."
172 :type
'(choice (regexp :tag
"Regexp")
173 (const :tag
"All URLs are safe" nil
))
174 :group
'mime-display
)
176 (defcustom mm-inline-text-html-with-w3m-keymap t
177 "If non-nil, use emacs-w3m command keys in the article buffer."
180 :group
'mime-display
)
182 (defcustom mm-enable-external t
183 "Indicate whether external MIME handlers should be used.
185 If t, all defined external MIME handlers are used. If nil, files are saved by
186 `mailcap-save-binary-file'. If it is the symbol `ask', you are prompted
187 before the external MIME handler is invoked."
189 :type
'(choice (const :tag
"Always" t
)
190 (const :tag
"Never" nil
)
191 (const :tag
"Ask" ask
))
192 :group
'mime-display
)
194 (defcustom mm-inline-media-tests
198 (mm-valid-and-fit-image-p 'jpeg handle
)))
202 (mm-valid-and-fit-image-p 'png handle
)))
206 (mm-valid-and-fit-image-p 'gif handle
)))
210 (mm-valid-and-fit-image-p 'tiff handle
)))
214 (mm-valid-and-fit-image-p 'xbm handle
)))
218 (mm-valid-and-fit-image-p 'xbm handle
)))
222 (mm-valid-and-fit-image-p 'xpm handle
)))
226 (mm-valid-and-fit-image-p 'xpm handle
)))
230 (mm-valid-and-fit-image-p 'bmp handle
)))
231 ("image/x-portable-bitmap"
234 (mm-valid-and-fit-image-p 'pbm handle
)))
235 ("text/plain" mm-inline-text identity
)
236 ("text/enriched" mm-inline-text identity
)
237 ("text/richtext" mm-inline-text identity
)
238 ("text/x-patch" mm-display-patch-inline identity
)
239 ;; In case mime.types uses x-diff (as does Debian's mime-support-3.40).
240 ("text/x-diff" mm-display-patch-inline identity
)
241 ("application/emacs-lisp" mm-display-elisp-inline identity
)
242 ("application/x-emacs-lisp" mm-display-elisp-inline identity
)
243 ("application/x-shellscript" mm-display-shell-script-inline identity
)
244 ("application/x-sh" mm-display-shell-script-inline identity
)
245 ("text/x-sh" mm-display-shell-script-inline identity
)
246 ("application/javascript" mm-display-javascript-inline identity
)
247 ("text/dns" mm-display-dns-inline identity
)
248 ("text/x-org" mm-display-org-inline identity
)
252 mm-text-html-renderer
))
256 (or (featurep 'vcard
)
257 (locate-library "vcard"))))
258 ("message/delivery-status" mm-inline-text identity
)
259 ("message/rfc822" mm-inline-message identity
)
260 ("message/partial" mm-inline-partial identity
)
261 ("message/external-body" mm-inline-external-body identity
)
262 ("text/.*" mm-inline-text identity
)
263 ("application/x-.?tar\\(-.*\\)?" mm-archive-dissect-and-inline identity
)
264 ("application/zip" mm-archive-dissect-and-inline identity
)
265 ("audio/wav" mm-inline-audio
267 (and (or (featurep 'nas-sound
) (featurep 'native-sound
))
268 (device-sound-enabled-p))))
272 (and (or (featurep 'nas-sound
) (featurep 'native-sound
))
273 (device-sound-enabled-p))))
274 ("application/pgp-signature" ignore identity
)
275 ("application/x-pkcs7-signature" ignore identity
)
276 ("application/pkcs7-signature" ignore identity
)
277 ("application/x-pkcs7-mime" ignore identity
)
278 ("application/pkcs7-mime" ignore identity
)
279 ("multipart/alternative" ignore identity
)
280 ("multipart/mixed" ignore identity
)
281 ("multipart/related" ignore identity
)
285 (and (mm-valid-image-format-p 'imagemagick
)
286 (mm-with-unibyte-buffer
287 (mm-insert-part handle
)
290 (if (fboundp 'create-image
)
291 (create-image (buffer-string) 'imagemagick
'data-p
)
292 (mm-create-image-xemacs
293 (mm-handle-media-subtype handle
))))))
295 (setcar (cdr handle
) (list "image/imagemagick"))
296 (mm-image-fit-p handle
)))))))
297 ;; Disable audio and image
298 ("audio/.*" ignore ignore
)
299 ("image/.*" ignore ignore
)
300 ;; Default to displaying as text
301 (".*" mm-inline-text mm-readable-p
))
302 "Alist of media types/tests saying whether types can be displayed inline."
303 :type
'(repeat (list (regexp :tag
"MIME type")
304 (function :tag
"Display function")
305 (function :tag
"Display test")))
306 :group
'mime-display
)
308 (defcustom mm-inlined-types
309 '("image/.*" "text/.*" "message/delivery-status" "message/rfc822"
310 "message/partial" "message/external-body" "application/emacs-lisp"
311 "application/x-emacs-lisp"
312 "application/pgp-signature" "application/x-pkcs7-signature"
313 "application/pkcs7-signature" "application/x-pkcs7-mime"
314 "application/pkcs7-mime"
315 "application/x-gtar-compressed"
318 ;; Mutt still uses this even though it has already been withdrawn.
320 "List of media types that are to be displayed inline.
321 See also `mm-inline-media-tests', which says how to display a media
323 :type
'(repeat regexp
)
324 :group
'mime-display
)
326 (defcustom mm-keep-viewer-alive-types
327 '("application/postscript" "application/msword" "application/vnd.ms-excel"
328 "application/pdf" "application/x-dvi")
329 "List of media types for which the external viewer will not be killed
330 when selecting a different article."
332 :type
'(repeat regexp
)
333 :group
'mime-display
)
335 (defcustom mm-automatic-display
336 '("text/plain" "text/enriched" "text/richtext" "text/html" "text/x-verbatim"
337 "text/x-vcard" "image/.*" "message/delivery-status" "multipart/.*"
338 "message/rfc822" "text/x-patch" "text/dns" "application/pgp-signature"
339 "application/emacs-lisp" "application/x-emacs-lisp"
340 "application/x-pkcs7-signature"
341 "application/pkcs7-signature" "application/x-pkcs7-mime"
342 "application/pkcs7-mime"
343 ;; Mutt still uses this even though it has already been withdrawn.
346 "A list of MIME types to be displayed automatically."
347 :type
'(repeat regexp
)
348 :group
'mime-display
)
350 (defcustom mm-attachment-override-types
'("text/x-vcard"
351 "application/pkcs7-mime"
352 "application/x-pkcs7-mime"
353 "application/pkcs7-signature"
354 "application/x-pkcs7-signature")
355 "Types to have \"attachment\" ignored if they can be displayed inline."
356 :type
'(repeat regexp
)
357 :group
'mime-display
)
359 (defcustom mm-inline-override-types nil
360 "Types to be treated as attachments even if they can be displayed inline."
361 :type
'(repeat regexp
)
362 :group
'mime-display
)
364 (defcustom mm-automatic-external-display nil
365 "List of MIME type regexps that will be displayed externally automatically."
366 :type
'(repeat regexp
)
367 :group
'mime-display
)
369 (defcustom mm-discouraged-alternatives nil
370 "List of MIME types that are discouraged when viewing multipart/alternative.
371 Viewing agents are supposed to view the last possible part of a message,
372 as that is supposed to be the richest. However, users may prefer other
373 types instead, and this list says what types are most unwanted. If,
374 for instance, text/html parts are very unwanted, and text/richtext are
375 somewhat unwanted, then the value of this variable should be set
378 (\"text/html\" \"text/richtext\")
380 Adding \"image/.*\" might also be useful. Spammers use it as the
381 preferred part of multipart/alternative messages. See also
382 `gnus-buttonized-mime-types', to which adding \"multipart/alternative\"
383 enables you to choose manually one of two types those mails include."
384 :type
'(repeat regexp
) ;; See `mm-preferred-alternative-precedence'.
385 :group
'mime-display
)
387 (defcustom mm-tmp-directory
388 (if (fboundp 'temp-directory
)
390 (if (boundp 'temporary-file-directory
)
391 temporary-file-directory
393 "Where mm will store its temporary files."
395 :group
'mime-display
)
397 (defcustom mm-inline-large-images nil
398 "If t, then all images fit in the buffer.
399 If 'resize, try to resize the images so they fit."
401 (const :tag
"Inline large images as they are." t
)
402 (const :tag
"Resize large images." resize
)
403 (const :tag
"Do not inline large images." nil
))
404 :group
'mime-display
)
406 (defcustom mm-file-name-rewrite-functions
407 '(mm-file-name-delete-control mm-file-name-delete-gotchas
)
408 "List of functions used for rewriting file names of MIME parts.
409 Each function takes a file name as input and returns a file name.
411 Ready-made functions include `mm-file-name-delete-control',
412 `mm-file-name-delete-gotchas' (you should not remove these two
413 functions), `mm-file-name-delete-whitespace',
414 `mm-file-name-trim-whitespace', `mm-file-name-collapse-whitespace',
415 `mm-file-name-replace-whitespace', `capitalize', `downcase',
416 `upcase', and `upcase-initials'."
417 :type
'(list (set :inline t
418 (const mm-file-name-delete-control
)
419 (const mm-file-name-delete-gotchas
)
420 (const mm-file-name-delete-whitespace
)
421 (const mm-file-name-trim-whitespace
)
422 (const mm-file-name-collapse-whitespace
)
423 (const mm-file-name-replace-whitespace
)
427 (const upcase-initials
)
431 :version
"23.1" ;; No Gnus
432 :group
'mime-display
)
435 (defvar mm-path-name-rewrite-functions nil
436 "*List of functions for rewriting the full file names of MIME parts.
437 This is used when viewing parts externally, and is meant for
438 transforming the absolute name so that non-compliant programs can find
439 the file where it's saved.
441 Each function takes a file name as input and returns a file name.")
443 (defvar mm-file-name-replace-whitespace nil
444 "String used for replacing whitespace characters; default is `\"_\"'.")
446 (defcustom mm-default-directory nil
447 "The default directory where mm will save files.
448 If not set, `default-directory' will be used."
449 :type
'(choice directory
(const :tag
"Default" nil
))
450 :group
'mime-display
)
452 (defcustom mm-attachment-file-modes
384
453 "Set the mode bits of saved attachments to this integer."
456 :group
'mime-display
)
458 (defcustom mm-external-terminal-program
"xterm"
459 "The program to start an external terminal."
462 :group
'mime-display
)
464 ;;; Internal variables.
466 (defvar mm-last-shell-command
"")
467 (defvar mm-content-id-alist nil
)
468 (defvar mm-postponed-undisplay-list nil
)
469 (defvar mm-inhibit-auto-detect-attachment nil
)
470 (defvar mm-temp-files-to-be-deleted nil
471 "List of temporary files scheduled to be deleted.")
472 (defvar mm-temp-files-cache-file
(concat ".mm-temp-files-" (user-login-name))
473 "Name of a file that caches a list of temporary files to be deleted.
474 The file will be saved in the directory `mm-tmp-directory'.")
476 ;; According to RFC2046, in particular, in a digest, the default
477 ;; Content-Type value for a body part is changed from "text/plain" to
479 (defvar mm-dissect-default-type
"text/plain")
481 (autoload 'mml2015-verify
"mml2015")
482 (autoload 'mml2015-verify-test
"mml2015")
483 (autoload 'mml-smime-verify
"mml-smime")
484 (autoload 'mml-smime-verify-test
"mml-smime")
486 (defvar mm-verify-function-alist
487 '(("application/pgp-signature" mml2015-verify
"PGP" mml2015-verify-test
)
488 ("application/x-gnus-pgp-signature" mm-uu-pgp-signed-extract-1
"PGP"
489 mm-uu-pgp-signed-test
)
490 ("application/pkcs7-signature" mml-smime-verify
"S/MIME"
491 mml-smime-verify-test
)
492 ("application/x-pkcs7-signature" mml-smime-verify
"S/MIME"
493 mml-smime-verify-test
)))
495 (defcustom mm-verify-option
'never
496 "Option of verifying signed parts.
497 `never', not verify; `always', always verify;
498 `known', only verify known protocols. Otherwise, ask user.
500 When set to `always' or `known', you should add
501 \"multipart/signed\" to `gnus-buttonized-mime-types' to see
502 result of the verification."
504 :type
'(choice (item always
)
506 (item :tag
"only known protocols" known
)
507 (item :tag
"ask" nil
))
508 :group
'mime-security
)
510 (autoload 'mml2015-decrypt
"mml2015")
511 (autoload 'mml2015-decrypt-test
"mml2015")
513 (defvar mm-decrypt-function-alist
514 '(("application/pgp-encrypted" mml2015-decrypt
"PGP" mml2015-decrypt-test
)
515 ("application/x-gnus-pgp-encrypted" mm-uu-pgp-encrypted-extract-1
"PGP"
516 mm-uu-pgp-encrypted-test
)))
518 (defcustom mm-decrypt-option nil
519 "Option of decrypting encrypted parts.
520 `never', not decrypt; `always', always decrypt;
521 `known', only decrypt known protocols. Otherwise, ask user."
523 :type
'(choice (item always
)
525 (item :tag
"only known protocols" known
)
526 (item :tag
"ask" nil
))
527 :group
'mime-security
)
529 (defvar mm-viewer-completion-map
530 (let ((map (make-sparse-keymap 'mm-viewer-completion-map
)))
531 (set-keymap-parent map minibuffer-local-completion-map
)
532 ;; Should we bind other key to minibuffer-complete-word?
533 (define-key map
" " 'self-insert-command
)
535 "Keymap for input viewer with completion.")
539 (defun mm-alist-to-plist (alist)
540 "Convert association list ALIST into the equivalent property-list form.
541 The plist is returned. This converts from
543 \((a . 1) (b . 2) (c . 3))
549 The original alist is not modified. See also `destructive-alist-to-plist'."
552 (let ((el (car alist
)))
553 (setq plist
(cons (cdr el
) (cons (car el
) plist
))))
554 (setq alist
(cdr alist
)))
557 (defun mm-keep-viewer-alive-p (handle)
558 "Say whether external viewer for HANDLE should stay alive."
559 (let ((types mm-keep-viewer-alive-types
)
560 (type (mm-handle-media-type handle
))
563 (while (setq ty
(pop types
))
564 (when (string-match ty type
)
565 (throw 'found t
))))))
567 (defun mm-handle-set-external-undisplayer (handle function
)
568 "Set the undisplayer for HANDLE to FUNCTION.
569 Postpone undisplaying of viewers for types in
570 `mm-keep-viewer-alive-types'."
571 (if (mm-keep-viewer-alive-p handle
)
572 (let ((new-handle (copy-sequence handle
)))
573 (mm-handle-set-undisplayer new-handle function
)
574 (mm-handle-set-undisplayer handle nil
)
575 (push new-handle mm-postponed-undisplay-list
))
576 (mm-handle-set-undisplayer handle function
)))
578 (defun mm-destroy-postponed-undisplay-list ()
579 (when mm-postponed-undisplay-list
580 (message "Destroying external MIME viewers")
581 (mm-destroy-parts mm-postponed-undisplay-list
)))
583 (defun mm-temp-files-delete ()
584 "Delete temporary files and those parent directories.
585 Note that the deletion may fail if a program is catching hold of a file
586 under Windows or Cygwin. In that case, it schedules the deletion of
587 files left at the next time."
588 (let* ((coding-system-for-read mm-universal-coding-system
)
589 (coding-system-for-write mm-universal-coding-system
)
590 (cache-file (expand-file-name mm-temp-files-cache-file
592 (cache (when (file-exists-p cache-file
)
593 (mm-with-multibyte-buffer
594 (insert-file-contents cache-file
)
595 (split-string (buffer-string) "\n" t
))))
597 (dolist (temp (append cache mm-temp-files-to-be-deleted
))
598 (when (and (file-exists-p temp
)
599 (if (file-directory-p temp
)
600 ;; A parent directory left at the previous time.
602 (ignore-errors (delete-directory temp
))
603 (file-exists-p temp
))
604 ;; Delete a temporary file and its parent directory.
605 (ignore-errors (delete-file temp
))
606 (or (file-exists-p temp
)
608 (setq temp
(file-name-directory temp
))
609 (ignore-errors (delete-directory temp
))
610 (file-exists-p temp
)))))
613 ;; Schedule the deletion of the files left at the next time.
615 (write-region (concat (mapconcat 'identity
(nreverse fails
) "\n")
617 nil cache-file nil
'silent
)
618 (set-file-modes cache-file
#o600
))
619 (when (file-exists-p cache-file
)
620 (ignore-errors (delete-file cache-file
))))
621 (setq mm-temp-files-to-be-deleted nil
)))
623 (autoload 'message-fetch-field
"message")
625 (defun mm-dissect-buffer (&optional no-strict-mime loose-mime from
)
626 "Dissect the current buffer and return a list of MIME handles.
627 If NO-STRICT-MIME, don't require the message to have a
628 MIME-Version header before proceeding."
630 (let (ct ctl type subtype cte cd description id result
)
632 (mail-narrow-to-head)
633 (when (or no-strict-mime
635 (mail-fetch-field "mime-version"))
636 (setq ct
(mail-fetch-field "content-type")
637 ctl
(and ct
(mail-header-parse-content-type ct
))
638 cte
(mail-fetch-field "content-transfer-encoding")
639 cd
(or (mail-fetch-field "content-disposition")
642 (cadr (mm-assoc-string-match
643 mm-inline-media-tests
646 ;; Newlines in description should be stripped so as
647 ;; not to break the MIME tag into two or more lines.
648 description
(message-fetch-field "content-description")
649 id
(mail-fetch-field "content-id"))
651 (setq from
(mail-fetch-field "from")))
652 ;; FIXME: In some circumstances, this code is running within
653 ;; a unibyte macro. mail-extract-address-components
654 ;; creates unibyte buffers. This `if', though not a perfect
655 ;; solution, avoids most of them.
657 (setq from
(cadr (mail-extract-address-components from
))))
659 (setq description
(mail-decode-encoded-word-string
662 (not (string-match "/" (car ctl
))))
663 (mm-dissect-singlepart
664 (list mm-dissect-default-type
)
665 (and cte
(intern (downcase (mail-header-strip cte
))))
667 (and cd
(mail-header-parse-content-disposition cd
))
669 (setq type
(split-string (car ctl
) "/"))
670 (setq subtype
(cadr type
)
675 ((equal type
"multipart")
676 (let ((mm-dissect-default-type (if (equal subtype
"digest")
679 (start (cdr (assq 'start
(cdr ctl
)))))
680 (add-text-properties 0 (length (car ctl
))
681 (mm-alist-to-plist (cdr ctl
)) (car ctl
))
683 ;; what really needs to be done here is a way to link a
684 ;; MIME handle back to it's parent MIME handle (in a multilevel
685 ;; MIME article). That would probably require changing
686 ;; the mm-handle API so we simply store the multipart buffer
687 ;; name as a text property of the "multipart/whatever" string.
688 (add-text-properties 0 (length (car ctl
))
689 (list 'buffer
(mm-copy-to-buffer)
693 (cons (car ctl
) (mm-dissect-multipart ctl from
))))
695 (mm-possibly-verify-or-decrypt
696 (mm-dissect-singlepart
698 (and cte
(intern (downcase (mail-header-strip cte
))))
700 (and cd
(mail-header-parse-content-disposition cd
))
704 (when (string-match " *<\\(.*\\)> *" id
)
705 (setq id
(match-string 1 id
)))
706 (push (cons id result
) mm-content-id-alist
))
709 (defun mm-dissect-singlepart (ctl cte
&optional force cdl description id
)
711 (if (equal "text/plain" (car ctl
))
714 ;; Guess what the type of application/octet-stream parts should
716 (let ((filename (cdr (assq 'filename
(cdr cdl
)))))
717 (when (and (not mm-inhibit-auto-detect-attachment
)
718 (equal (car ctl
) "application/octet-stream")
720 (string-match "\\.\\([^.]+\\)$" filename
))
721 (let ((new-type (mailcap-extension-to-mime (match-string 1 filename
))))
723 (setcar ctl new-type
)))))
726 (mm-copy-to-buffer) ctl cte nil cdl description nil id
))
727 (decoder (assoc (car ctl
) (mm-archive-decoders))))
729 ;; Do automatic decoding
731 (executable-find (caddr decoder
)))
732 (mm-dissect-archive handle
)
735 (defun mm-dissect-multipart (ctl from
)
736 (goto-char (point-min))
737 (let* ((boundary (concat "\n--" (mail-content-type-get ctl
'boundary
)))
738 (close-delimiter (concat (regexp-quote boundary
) "--[ \t]*$"))
741 (goto-char (point-max))
742 (if (re-search-backward close-delimiter nil t
)
745 (mm-inhibit-auto-detect-attachment
746 (equal (car ctl
) "multipart/encrypted")))
747 (setq boundary
(concat (regexp-quote boundary
) "[ \t]*$"))
748 (while (and (< (point) end
) (re-search-forward boundary end t
))
749 (goto-char (match-beginning 0))
753 (narrow-to-region start
(point))
754 (setq parts
(nconc (list (mm-dissect-buffer t nil from
)) parts
)))))
756 (or (looking-at boundary
)
758 (setq start
(point)))
759 (when (and start
(< start end
))
762 (narrow-to-region start end
)
763 (setq parts
(nconc (list (mm-dissect-buffer t nil from
)) parts
)))))
764 (mm-possibly-verify-or-decrypt (nreverse parts
) ctl from
)))
766 (defun mm-copy-to-buffer ()
767 "Copy the contents of the current buffer to a fresh buffer."
768 (let ((obuf (current-buffer))
769 (mb (mm-multibyte-p))
771 (goto-char (point-min))
772 (search-forward-regexp "^\n" nil t
)
775 (generate-new-buffer " *mm*")
776 ;; Preserve the data's unibyteness (for url-insert-file-contents).
777 (mm-set-buffer-multibyte mb
)
778 (insert-buffer-substring obuf beg
)
781 (defun mm-display-parts (handle &optional no-default
)
782 (if (stringp (car handle
))
783 (mapcar 'mm-display-parts
(cdr handle
))
784 (if (bufferp (car handle
))
786 (narrow-to-region (point) (point))
787 (mm-display-part handle
)
788 (goto-char (point-max)))
789 (mapcar 'mm-display-parts handle
))))
791 (autoload 'mailcap-parse-mailcaps
"mailcap")
792 (autoload 'mailcap-mime-info
"mailcap")
794 (defun mm-head-p (&optional point
)
795 "Return non-nil if point is in the article header."
796 (let ((point (or point
(point))))
799 (and (not (re-search-backward "^$" nil t
))
800 (re-search-forward "^$" nil t
)))))
802 (defun mm-display-part (handle &optional no-default force
)
803 "Display the MIME part represented by HANDLE.
804 Returns nil if the part is removed; inline if displayed inline;
805 external if displayed external."
807 (mailcap-parse-mailcaps)
809 (mm-handle-displayed-p handle
))
810 (mm-remove-part handle
)
811 (let* ((ehandle (if (equal (mm-handle-media-type handle
)
812 "message/external-body")
814 (unless (mm-handle-cache handle
)
815 (mm-extern-cache-contents handle
))
816 (mm-handle-cache handle
))
818 (type (mm-handle-media-type ehandle
))
819 (method (mailcap-mime-info type
))
820 (filename (or (mail-content-type-get
821 (mm-handle-disposition handle
) 'filename
)
822 (mail-content-type-get
823 (mm-handle-type handle
) 'name
)
825 (external mm-enable-external
)
826 (decoder (assoc (car (mm-handle-type handle
))
827 (mm-archive-decoders))))
830 (executable-find (caddr decoder
)))
831 (mm-archive-dissect-and-inline handle
)
833 ((and (mm-inlinable-p ehandle
)
834 (mm-inlined-p ehandle
))
837 (re-search-forward "^$" nil t
)
839 (mm-display-inline handle
)
843 (if (and (not method
)
844 (equal "text" (car (split-string type
"/"))))
847 (mm-insert-inline handle
(mm-get-part handle
))
850 (and method
;; If nil, we always use "save".
851 (or (eq mm-enable-external t
)
852 (and (eq mm-enable-external
'ask
)
855 "Display part (" type
859 "using external program \""
860 (format method filename
) "\"")
862 "by calling `%s' on the contents)" method
))
866 handle
(or method
'mailcap-save-binary-file
))
868 handle
'mailcap-save-binary-file
)))))))))
870 (declare-function gnus-configure-windows
"gnus-win" (setting &optional force
))
871 (defvar mailcap-mime-extensions
) ; mailcap-mime-info autoloads
872 (declare-function term-mode
"term" ())
873 (declare-function term-char-mode
"term" ())
875 (defun mm-display-external (handle method
)
876 "Display HANDLE using METHOD."
877 (let ((outbuf (current-buffer)))
878 (mm-with-unibyte-buffer
879 (if (functionp method
)
880 (let ((cur (current-buffer)))
881 (if (eq method
'mailcap-save-binary-file
)
883 (set-buffer (generate-new-buffer " *mm*"))
885 (mm-insert-part handle
)
886 (mm-add-meta-html-tag handle
)
887 (let ((win (get-buffer-window cur t
)))
889 (select-window win
)))
890 (switch-to-buffer (generate-new-buffer " *mm*")))
891 (buffer-disable-undo)
892 (mm-set-buffer-file-coding-system mm-binary-coding-system
)
893 (insert-buffer-substring cur
)
894 (goto-char (point-min))
896 (message "Viewing with %s" method
))
897 (let ((mm (current-buffer))
898 (non-viewer (assq 'non-viewer
900 (mm-handle-media-type handle
) t
))))
904 (when (and (boundp 'gnus-summary-buffer
)
905 (bufferp gnus-summary-buffer
)
906 (buffer-name gnus-summary-buffer
))
907 ;; So that we pop back to the right place, sort of.
908 (switch-to-buffer gnus-summary-buffer
)
909 (switch-to-buffer mm
))
910 (delete-other-windows)
912 (mm-save-part handle
))
913 (when (and (not non-viewer
)
915 (mm-handle-set-undisplayer handle mm
)))))
916 ;; The function is a string to be executed.
917 (mm-insert-part handle
)
918 (mm-add-meta-html-tag handle
)
919 (let* ((dir (mm-make-temp-file
920 (expand-file-name "emm." mm-tmp-directory
) 'dir
))
922 (mail-content-type-get
923 (mm-handle-disposition handle
) 'filename
)
924 (mail-content-type-get
925 (mm-handle-type handle
) 'name
)))
926 (mime-info (mailcap-mime-info
927 (mm-handle-media-type handle
) t
))
928 (needsterm (or (assoc "needsterm" mime-info
)
929 (assoc "needsterminal" mime-info
)))
930 (copiousoutput (assoc "copiousoutput" mime-info
))
932 ;; We create a private sub-directory where we store our files.
933 (set-file-modes dir
#o700
)
935 (setq file
(expand-file-name
936 (gnus-map-function mm-file-name-rewrite-functions
937 (file-name-nondirectory filename
))
939 ;; Use nametemplate (defined in RFC1524) if it is specified
941 (let ((suffix (cdr (assoc "nametemplate" mime-info
))))
943 (string-match "\\`%s\\(\\..+\\)\\'" suffix
))
944 (setq suffix
(match-string 1 suffix
))
945 ;; Otherwise, use a suffix according to
946 ;; `mailcap-mime-extensions'.
947 (setq suffix
(car (rassoc (mm-handle-media-type handle
)
948 mailcap-mime-extensions
))))
949 (setq file
(mm-make-temp-file (expand-file-name "mm." dir
)
951 (let ((coding-system-for-write mm-binary-coding-system
))
952 (write-region (point-min) (point-max) file nil
'nomesg
))
953 ;; The file is deleted after the viewer exists. If the users edits
954 ;; the file, changes will be lost. Set file to read-only to make it
956 (set-file-modes file
#o400
)
957 (message "Viewing with %s" method
)
960 (let ((command (mm-mailcap-command
961 method file
(mm-handle-type handle
))))
964 (set-process-sentinel
965 (start-process "*display*" nil
966 mm-external-terminal-program
968 shell-command-switch command
)
969 `(lambda (process state
)
970 (if (eq 'exit
(process-status process
))
974 (ignore-errors (delete-file ,file
))
975 (ignore-errors (delete-directory
976 ,(file-name-directory
985 shell-command-switch command
)))
988 (set-process-sentinel
989 (get-buffer-process buffer
)
990 `(lambda (process state
)
991 (when (eq 'exit
(process-status process
))
992 (ignore-errors (delete-file ,file
))
994 (delete-directory ,(file-name-directory file
)))
995 (gnus-configure-windows
996 ',gnus-current-window-configuration
))))
997 (gnus-configure-windows 'display-term
))
998 (mm-handle-set-external-undisplayer handle
(cons file buffer
))
999 (add-to-list 'mm-temp-files-to-be-deleted file t
))
1000 (message "Displaying %s..." command
))
1003 (with-current-buffer outbuf
1009 (call-process shell-file-name nil
1011 (generate-new-buffer " *mm*"))
1013 shell-command-switch
1015 method file
(mm-handle-type handle
)))
1016 (if (buffer-live-p buffer
)
1017 (with-current-buffer buffer
1020 (ignore-errors (delete-file file
))
1021 (ignore-errors (delete-directory
1022 (file-name-directory file
)))
1023 (ignore-errors (kill-buffer buffer
))))))
1026 ;; Deleting the temp file should be postponed for some wrappers,
1027 ;; shell scripts, and so on, which might exit right after having
1028 ;; started a viewer command as a background job.
1029 (let ((command (mm-mailcap-command
1030 method file
(mm-handle-type handle
))))
1032 (let ((process-connection-type nil
))
1033 (start-process "*display*"
1035 (generate-new-buffer " *mm*"))
1037 shell-command-switch command
)
1038 (set-process-sentinel
1039 (get-buffer-process buffer
)
1040 (lexical-let ((outbuf outbuf
)
1045 (lambda (process state
)
1046 (when (eq (process-status process
) 'exit
)
1050 (ignore-errors (delete-file file
))
1051 (ignore-errors (delete-directory
1052 (file-name-directory file
)))))
1053 (when (buffer-live-p outbuf
)
1054 (with-current-buffer outbuf
1055 (let ((buffer-read-only nil
)
1058 (let ((start (point)))
1060 handle
(with-current-buffer buffer
1062 (put-text-property start
(point)
1063 'face
'mm-command-output
))
1064 (goto-char point
))))
1065 (when (buffer-live-p buffer
)
1066 (kill-buffer buffer
)))
1067 (message "Displaying %s...done" command
)))))
1068 (mm-handle-set-external-undisplayer
1069 handle
(cons file buffer
))
1070 (add-to-list 'mm-temp-files-to-be-deleted file t
))
1071 (message "Displaying %s..." command
))
1074 (defun mm-mailcap-command (method file type-list
)
1075 (let ((ctl (cdr type-list
))
1079 (while (string-match "%{\\([^}]+\\)}\\|'%s'\\|\"%s\"\\|%s\\|%t\\|%%"
1081 (push (substring method beg
(match-beginning 0)) out
)
1082 (setq beg
(match-end 0)
1083 total
(match-string 0 method
)
1084 sub
(match-string 1 method
))
1086 ((string= total
"%%")
1088 ((or (string= total
"%s")
1089 ;; We do our own quoting.
1090 (string= total
"'%s'")
1091 (string= total
"\"%s\""))
1092 (setq uses-stdin nil
)
1093 (push (shell-quote-argument
1094 (gnus-map-function mm-path-name-rewrite-functions file
)) out
))
1095 ((string= total
"%t")
1096 (push (shell-quote-argument (car type-list
)) out
))
1098 (push (shell-quote-argument (or (cdr (assq (intern sub
) ctl
)) "")) out
))))
1099 (push (substring method beg
(length method
)) out
)
1102 (push (shell-quote-argument
1103 (gnus-map-function mm-path-name-rewrite-functions file
))
1105 (mapconcat 'identity
(nreverse out
) "")))
1107 (defun mm-remove-parts (handles)
1108 "Remove the displayed MIME parts represented by HANDLES."
1109 (if (and (listp handles
)
1110 (bufferp (car handles
)))
1111 (mm-remove-part handles
)
1113 (while (setq handle
(pop handles
))
1116 (when (buffer-live-p (get-text-property 0 'buffer handle
))
1117 (kill-buffer (get-text-property 0 'buffer handle
))))
1118 ((and (listp handle
)
1119 (stringp (car handle
)))
1120 (mm-remove-parts (cdr handle
)))
1122 (mm-remove-part handle
)))))))
1124 (defun mm-destroy-parts (handles)
1125 "Remove the displayed MIME parts represented by HANDLES."
1126 (if (and (listp handles
)
1127 (bufferp (car handles
)))
1128 (mm-destroy-part handles
)
1130 (while (setq handle
(pop handles
))
1133 (when (buffer-live-p (get-text-property 0 'buffer handle
))
1134 (kill-buffer (get-text-property 0 'buffer handle
))))
1135 ((and (listp handle
)
1136 (stringp (car handle
)))
1137 (mm-destroy-parts handle
))
1139 (mm-destroy-part handle
)))))))
1141 (defun mm-remove-part (handle)
1142 "Remove the displayed MIME part represented by HANDLE."
1143 (when (listp handle
)
1144 (let ((object (mm-handle-undisplayer handle
)))
1147 ;; Internally displayed part.
1148 ((mm-annotationp object
)
1149 (if (featurep 'xemacs
)
1150 (delete-annotation object
)))
1151 ((or (functionp object
)
1153 (eq (car object
) 'lambda
)))
1155 ;; Externally displayed part.
1158 (while (get-buffer-process (cdr object
))
1159 (interrupt-process (get-buffer-process (cdr object
)))
1160 (message "Waiting for external displayer to die...")
1164 (ignore-errors (and (cdr object
) (kill-buffer (cdr object
))))
1165 (message "Waiting for external displayer to die...done")
1166 (ignore-errors (delete-file (car object
)))
1167 (ignore-errors (delete-directory (file-name-directory
1170 (when (buffer-live-p object
)
1171 (kill-buffer object
)))))
1172 (mm-handle-set-undisplayer handle nil
))))
1174 (defun mm-display-inline (handle)
1175 (let* ((type (mm-handle-media-type handle
))
1176 (function (cadr (mm-assoc-string-match mm-inline-media-tests type
))))
1177 (funcall function handle
)
1178 (goto-char (point-min))))
1180 (defun mm-assoc-string-match (alist type
)
1181 (dolist (elem alist
)
1182 (when (string-match (car elem
) type
)
1185 (defun mm-automatic-display-p (handle)
1186 "Say whether the user wants HANDLE to be displayed automatically."
1187 (let ((methods mm-automatic-display
)
1188 (type (mm-handle-media-type handle
))
1190 (while (setq method
(pop methods
))
1191 (when (and (not (mm-inline-override-p handle
))
1192 (string-match method type
))
1197 (defun mm-inlinable-p (handle &optional type
)
1198 "Say whether HANDLE can be displayed inline.
1199 TYPE is the mime-type of the object; it defaults to the one given
1201 (unless type
(setq type
(mm-handle-media-type handle
)))
1202 (let ((alist mm-inline-media-tests
)
1205 (when (string-match (caar alist
) type
)
1206 (setq test
(caddar alist
)
1208 (setq test
(funcall test handle
)))
1212 (defun mm-inlined-p (handle)
1213 "Say whether the user wants HANDLE to be displayed inline."
1214 (let ((methods mm-inlined-types
)
1215 (type (mm-handle-media-type handle
))
1217 (while (setq method
(pop methods
))
1218 (when (and (not (mm-inline-override-p handle
))
1219 (string-match method type
))
1224 (defun mm-attachment-override-p (handle)
1225 "Say whether HANDLE should have attachment behavior overridden."
1226 (let ((types mm-attachment-override-types
)
1227 (type (mm-handle-media-type handle
))
1230 (while (setq ty
(pop types
))
1231 (when (and (string-match ty type
)
1232 (mm-inlinable-p handle
))
1233 (throw 'found t
))))))
1235 (defun mm-inline-override-p (handle)
1236 "Say whether HANDLE should have inline behavior overridden."
1237 (let ((types mm-inline-override-types
)
1238 (type (mm-handle-media-type handle
))
1241 (while (setq ty
(pop types
))
1242 (when (string-match ty type
)
1243 (throw 'found t
))))))
1245 (defun mm-automatic-external-display-p (type)
1246 "Return the user-defined method for TYPE."
1247 (let ((methods mm-automatic-external-display
)
1249 (while (setq method
(pop methods
))
1250 (when (string-match method type
)
1255 (defun mm-destroy-part (handle)
1256 "Destroy the data structures connected to HANDLE."
1257 (when (listp handle
)
1258 (mm-remove-part handle
)
1259 (when (buffer-live-p (mm-handle-buffer handle
))
1260 (kill-buffer (mm-handle-buffer handle
)))))
1262 (defun mm-handle-displayed-p (handle)
1263 "Say whether HANDLE is displayed or not."
1264 (mm-handle-undisplayer handle
))
1267 ;;; Functions for outputting parts
1270 (defmacro mm-with-part
(handle &rest forms
)
1271 "Run FORMS in the temp buffer containing the contents of HANDLE."
1272 ;; The handle-buffer's content is a sequence of bytes, not a sequence of
1273 ;; chars, so the buffer should be unibyte. It may happen that the
1274 ;; handle-buffer is multibyte for some reason, in which case now is a good
1275 ;; time to adjust it, since we know at this point that it should
1277 `(let* ((handle ,handle
))
1278 (when (and (mm-handle-buffer handle
)
1279 (buffer-name (mm-handle-buffer handle
)))
1281 (mm-disable-multibyte)
1282 (insert-buffer-substring (mm-handle-buffer handle
))
1283 (mm-decode-content-transfer-encoding
1284 (mm-handle-encoding handle
)
1285 (mm-handle-media-type handle
))
1287 (put 'mm-with-part
'lisp-indent-function
1)
1288 (put 'mm-with-part
'edebug-form-spec
'(body))
1290 (defun mm-get-part (handle &optional no-cache
)
1291 "Return the contents of HANDLE as a string.
1292 If NO-CACHE is non-nil, cached contents of a message/external-body part
1294 (if (and (not no-cache
)
1295 (equal (mm-handle-media-type handle
) "message/external-body"))
1297 (unless (mm-handle-cache handle
)
1298 (mm-extern-cache-contents handle
))
1299 (with-current-buffer (mm-handle-buffer (mm-handle-cache handle
))
1301 (mm-with-part handle
1304 (defun mm-insert-part (handle &optional no-cache
)
1305 "Insert the contents of HANDLE in the current buffer.
1306 If NO-CACHE is non-nil, cached contents of a message/external-body part
1308 (let ((text (cond ((eq (mail-content-type-get (mm-handle-type handle
)
1311 (with-current-buffer (mm-handle-buffer handle
)
1314 (mm-string-to-multibyte (mm-get-part handle no-cache
)))
1316 (mm-get-part handle no-cache
)))))
1322 (if (and (eq (get-char-property (max (point-min) (1- (point))) 'face
)
1324 (eq (get-char-property 0 'face text
) 'mm-uu-extract
))
1325 ;; Separate the extracted parts that have the same faces.
1329 (defun mm-file-name-delete-whitespace (file-name)
1330 "Remove all whitespace characters from FILE-NAME."
1331 (while (string-match "\\s-+" file-name
)
1332 (setq file-name
(replace-match "" t t file-name
)))
1335 (defun mm-file-name-trim-whitespace (file-name)
1336 "Remove leading and trailing whitespace characters from FILE-NAME."
1337 (when (string-match "\\`\\s-+" file-name
)
1338 (setq file-name
(substring file-name
(match-end 0))))
1339 (when (string-match "\\s-+\\'" file-name
)
1340 (setq file-name
(substring file-name
0 (match-beginning 0))))
1343 (defun mm-file-name-collapse-whitespace (file-name)
1344 "Collapse multiple whitespace characters in FILE-NAME."
1345 (while (string-match "\\s-\\s-+" file-name
)
1346 (setq file-name
(replace-match " " t t file-name
)))
1349 (defun mm-file-name-replace-whitespace (file-name)
1350 "Replace whitespace characters in FILE-NAME with underscores.
1351 Set the option `mm-file-name-replace-whitespace' to any other
1352 string if you do not like underscores."
1353 (let ((s (or mm-file-name-replace-whitespace
"_")))
1354 (while (string-match "\\s-" file-name
)
1355 (setq file-name
(replace-match s t t file-name
))))
1358 (defun mm-file-name-delete-control (filename)
1359 "Delete control characters from FILENAME."
1360 (gnus-replace-in-string filename
"[\x00-\x1f\x7f]" ""))
1362 (defun mm-file-name-delete-gotchas (filename)
1363 "Delete shell gotchas from FILENAME."
1364 (setq filename
(gnus-replace-in-string filename
"[<>|]" ""))
1365 (gnus-replace-in-string filename
"^[.-]+" ""))
1367 (defun mm-save-part (handle &optional prompt
)
1368 "Write HANDLE to a file.
1369 PROMPT overrides the default one used to ask user for a file name."
1370 (let ((filename (or (mail-content-type-get
1371 (mm-handle-disposition handle
) 'filename
)
1372 (mail-content-type-get
1373 (mm-handle-type handle
) 'name
)))
1376 (setq filename
(gnus-map-function mm-file-name-rewrite-functions
1377 (file-name-nondirectory filename
))))
1383 (format "Save MIME part to (default %s): "
1385 (or mm-default-directory default-directory
)
1386 (expand-file-name (or filename
"")
1387 (or mm-default-directory default-directory
))))
1388 (cond ((or (not file
) (equal file
""))
1389 (message "Please enter a file name")
1391 ((and (file-directory-p file
)
1393 (message "Please enter a non-directory file name")
1398 (if (file-directory-p file
)
1399 (setq file
(expand-file-name filename file
))
1400 (setq file
(expand-file-name
1401 file
(or mm-default-directory default-directory
))))
1402 (setq mm-default-directory
(file-name-directory file
))
1403 (and (or (not (file-exists-p file
))
1404 (yes-or-no-p (format "File %s already exists; overwrite? "
1407 (mm-save-part-to-file handle file
)
1410 (defun mm-add-meta-html-tag (handle &optional charset force-charset
)
1411 "Add meta html tag to specify CHARSET of HANDLE in the current buffer.
1412 CHARSET defaults to the one HANDLE specifies. Existing meta tag that
1413 specifies charset will not be modified unless FORCE-CHARSET is non-nil.
1414 Return t if meta tag is added or replaced."
1415 (when (equal (mm-handle-media-type handle
) "text/html")
1417 (setq charset
(mail-content-type-get (mm-handle-type handle
)
1419 (setq charset
(format "\
1420 <meta http-equiv=\"Content-Type\" content=\"text/html; charset=%s\">" charset
))
1421 (let ((case-fold-search t
))
1422 (goto-char (point-min))
1423 (if (re-search-forward "\
1424 <meta\\s-+http-equiv=[\"']?content-type[\"']?\\s-+content=[\"']\
1425 text/\\(\\sw+\\)\\(?:\;\\s-*charset=\\([^\"'>]+\\)\\)?[^>]*>" nil t
)
1426 (if (and (not force-charset
)
1428 (string-match "\\`html\\'" (match-string 1)))
1429 ;; Don't modify existing meta tag.
1431 ;; Replace it with the one specifying charset.
1432 (replace-match charset
)
1434 (if (re-search-forward "<head>\\s-*" nil t
)
1435 (insert charset
"\n")
1436 (re-search-forward "<html\\(?:\\s-+[^>]+\\|\\s-*\\)>\\s-*" nil t
)
1437 (insert "<head>\n" charset
"\n</head>\n"))
1440 (defun mm-save-part-to-file (handle file
)
1441 (mm-with-unibyte-buffer
1442 (mm-insert-part handle
)
1443 (mm-add-meta-html-tag handle
)
1444 (let ((current-file-modes (default-file-modes)))
1445 (set-default-file-modes mm-attachment-file-modes
)
1447 ;; Don't re-compress .gz & al. Arguably we should make
1448 ;; `file-name-handler-alist' nil, but that would chop
1449 ;; ange-ftp, which is reasonable to use here.
1450 (mm-write-region (point-min) (point-max) file nil nil nil
'binary t
)
1451 (set-default-file-modes current-file-modes
)))))
1453 (defun mm-pipe-part (handle &optional cmd
)
1454 "Pipe HANDLE to a process.
1455 Use CMD as the process."
1456 (let ((name (mail-content-type-get (mm-handle-type handle
) 'name
))
1458 (gnus-read-shell-command
1459 "Shell command on MIME part: " mm-last-shell-command
))))
1460 (mm-with-unibyte-buffer
1461 (mm-insert-part handle
)
1462 (mm-add-meta-html-tag handle
)
1463 (let ((coding-system-for-write 'binary
))
1464 (shell-command-on-region (point-min) (point-max) command nil
)))))
1466 (autoload 'gnus-completing-read
"gnus-util")
1468 (defun mm-interactively-view-part (handle)
1469 "Display HANDLE using METHOD."
1470 (let* ((type (mm-handle-media-type handle
))
1472 (mapcar (lambda (i) (cdr (assoc 'viewer i
)))
1473 (mailcap-mime-info type
'all
)))
1474 (method (let ((minibuffer-local-completion-map
1475 mm-viewer-completion-map
))
1476 (completing-read "Viewer: " methods
))))
1477 (when (string= method
"")
1478 (error "No method given"))
1479 (if (string-match "^[^% \t]+$" method
)
1480 (setq method
(concat method
" %s")))
1481 (mm-display-external handle method
)))
1483 (defun mm-preferred-alternative (handles &optional preferred
)
1484 "Say which of HANDLES are preferred."
1485 (let ((prec (if preferred
(list preferred
)
1486 (mm-preferred-alternative-precedence handles
)))
1487 p h result type handle
)
1488 (while (setq p
(pop prec
))
1491 (setq handle
(car h
))
1492 (setq type
(mm-handle-media-type handle
))
1493 (when (and (equal p type
)
1494 (mm-automatic-display-p handle
)
1495 (or (stringp (car handle
))
1496 (not (mm-handle-disposition handle
))
1497 (equal (car (mm-handle-disposition handle
))
1505 (defun mm-preferred-alternative-precedence (handles)
1506 "Return the precedence based on HANDLES and `mm-discouraged-alternatives'."
1507 (setq handles
(reverse handles
))
1508 (dolist (disc (reverse mm-discouraged-alternatives
))
1509 (dolist (handle (copy-sequence handles
))
1510 (when (string-match disc
(mm-handle-media-type handle
))
1511 (setq handles
(nconc (delete handle handles
) (list handle
))))))
1512 ;; Remove empty parts.
1513 (dolist (handle (copy-sequence handles
))
1514 (when (and (bufferp (mm-handle-buffer handle
))
1515 (not (with-current-buffer (mm-handle-buffer handle
)
1516 (goto-char (point-min))
1517 (re-search-forward "[^ \t\n]" nil t
))))
1518 (setq handles
(nconc (delete handle handles
) (list handle
)))))
1519 (mapcar #'mm-handle-media-type handles
))
1521 (defun mm-get-content-id (id)
1522 "Return the handle(s) referred to by ID."
1523 (cdr (assoc id mm-content-id-alist
)))
1525 (defconst mm-image-type-regexps
1526 '(("/\\*.*XPM.\\*/" . xpm
)
1530 ("\211PNG\r\n" . png
)
1532 ("\\(MM\0\\*\\)\\|\\(II\\*\0\\)" . tiff
)
1533 ("%!PS" . postscript
))
1534 "Alist of (REGEXP . IMAGE-TYPE) pairs used to auto-detect image types.
1535 When the first bytes of an image file match REGEXP, it is assumed to
1536 be of image type IMAGE-TYPE.")
1538 ;; Steal from image.el. image-type-from-data suffers multi-line matching bug.
1539 (defun mm-image-type-from-buffer ()
1540 "Determine the image type from data in the current buffer.
1541 Value is a symbol specifying the image type or nil if type cannot
1543 (let ((types mm-image-type-regexps
)
1545 (goto-char (point-min))
1546 (while (and types
(null type
))
1547 (let ((regexp (car (car types
)))
1548 (image-type (cdr (car types
))))
1549 (when (looking-at regexp
)
1550 (setq type image-type
))
1551 (setq types
(cdr types
))))
1554 (defun mm-get-image (handle)
1555 "Return an image instance based on HANDLE."
1556 (let ((type (mm-handle-media-subtype handle
))
1558 ;; Allow some common translations.
1561 ((equal type
"x-pixmap")
1563 ((equal type
"x-xbitmap")
1565 ((equal type
"x-portable-bitmap")
1568 (or (mm-handle-cache handle
)
1569 (mm-with-unibyte-buffer
1570 (mm-insert-part handle
)
1574 ;; Avoid testing `make-glyph' since W3 may define
1575 ;; a bogus version of it.
1576 (if (fboundp 'create-image
)
1577 (create-image (buffer-string)
1578 (or (mm-image-type-from-buffer)
1581 (mm-create-image-xemacs type
))))
1582 (mm-handle-set-cache handle spec
))))))
1584 (defun mm-create-image-xemacs (type)
1585 (when (featurep 'xemacs
)
1588 ;; xbm images require special handling, since
1589 ;; the only way to create glyphs from these
1590 ;; (without a ton of work) is to write them
1591 ;; out to a file, and then create a file
1593 (let ((file (mm-make-temp-file
1594 (expand-file-name "emm" mm-tmp-directory
)
1598 (write-region (point-min) (point-max) file
)
1599 (make-glyph (list (cons 'x file
))))
1601 (delete-file file
)))))
1605 (or (mm-image-type-from-buffer)
1607 :data
(buffer-string)))))))
1609 (declare-function image-size
"image.c" (spec &optional pixels frame
))
1611 (defun mm-image-fit-p (handle)
1612 "Say whether the image in HANDLE will fit the current window."
1613 (let ((image (mm-get-image handle
)))
1615 (if (featurep 'xemacs
)
1616 ;; XEmacs's glyphs can actually tell us about their width, so
1617 ;; let's be nice and smart about them.
1618 (or mm-inline-large-images
1619 (and (<= (glyph-width image
) (window-pixel-width))
1620 (<= (glyph-height image
) (window-pixel-height))))
1621 (let* ((size (image-size image
))
1624 (or mm-inline-large-images
1625 (and (<= h
(1- (window-height))) ; Don't include mode line.
1626 (<= w
(window-width)))))))))
1628 (defun mm-valid-image-format-p (format)
1629 "Say whether FORMAT can be displayed natively by Emacs."
1632 ((fboundp 'valid-image-instantiator-format-p
)
1633 (valid-image-instantiator-format-p format
))
1635 ((fboundp 'image-type-available-p
)
1636 (and (display-graphic-p)
1637 (image-type-available-p format
)))
1638 ;; Nobody else can do images yet.
1642 (defun mm-valid-and-fit-image-p (format handle
)
1643 "Say whether FORMAT can be displayed natively and HANDLE fits the window."
1644 (and (mm-valid-image-format-p format
)
1645 (mm-image-fit-p handle
)))
1647 (defun mm-find-part-by-type (handles type
&optional notp recursive
)
1648 "Search in HANDLES for part with TYPE.
1649 If NOTP, returns first non-matching part.
1650 If RECURSIVE, search recursively."
1653 (if (and recursive
(stringp (caar handles
)))
1654 (if (setq handle
(mm-find-part-by-type (cdar handles
) type
1658 (not (equal (mm-handle-media-type (car handles
)) type
))
1659 (equal (mm-handle-media-type (car handles
)) type
))
1660 (setq handle
(car handles
)
1662 (setq handles
(cdr handles
)))
1665 (defun mm-find-raw-part-by-type (ctl type
&optional notp
)
1666 (goto-char (point-min))
1667 (let* ((boundary (concat "--" (mm-handle-multipart-ctl-parameter ctl
1669 (close-delimiter (concat "^" (regexp-quote boundary
) "--[ \t]*$"))
1671 (end (save-excursion
1672 (goto-char (point-max))
1673 (if (re-search-backward close-delimiter nil t
)
1677 (setq boundary
(concat "^" (regexp-quote boundary
) "[ \t]*$"))
1678 (while (and (not result
)
1679 (re-search-forward boundary end t
))
1680 (goto-char (match-beginning 0))
1684 (narrow-to-region start
(1- (point)))
1685 (when (let* ((ct (mail-fetch-field "content-type"))
1686 (ctl (and ct
(mail-header-parse-content-type ct
))))
1688 (not (equal (car ctl
) type
))
1689 (equal (car ctl
) type
)))
1690 (setq result
(buffer-string))))))
1692 (setq start
(point)))
1693 (when (and (not result
) start
)
1696 (narrow-to-region start end
)
1697 (when (let* ((ct (mail-fetch-field "content-type"))
1698 (ctl (and ct
(mail-header-parse-content-type ct
))))
1700 (not (equal (car ctl
) type
))
1701 (equal (car ctl
) type
)))
1702 (setq result
(buffer-string))))))
1705 (defvar mm-security-handle nil
)
1707 (defsubst mm-set-handle-multipart-parameter
(handle parameter value
)
1708 ;; HANDLE could be a CTL.
1710 (put-text-property 0 (length (car handle
)) parameter value
1713 (autoload 'mm-view-pkcs7
"mm-view")
1715 (defun mm-possibly-verify-or-decrypt (parts ctl
&optional from
)
1716 (let ((type (car ctl
))
1717 (subtype (cadr (split-string (car ctl
) "/")))
1718 (mm-security-handle ctl
) ;; (car CTL) is the type.
1719 protocol func functest
)
1721 ((or (equal type
"application/x-pkcs7-mime")
1722 (equal type
"application/pkcs7-mime"))
1725 ((eq mm-decrypt-option
'never
) nil
)
1726 ((eq mm-decrypt-option
'always
) t
)
1727 ((eq mm-decrypt-option
'known
) t
)
1729 (format "Decrypt (S/MIME) part? "))))
1730 (mm-view-pkcs7 parts from
))
1731 (setq parts
(mm-dissect-buffer t
)))))
1732 ((equal subtype
"signed")
1733 (unless (and (setq protocol
1734 (mm-handle-multipart-ctl-parameter ctl
'protocol
))
1735 (not (equal protocol
"multipart/mixed")))
1736 ;; The message is broken or draft-ietf-openpgp-multsig-01.
1737 (let ((protocols mm-verify-function-alist
))
1739 (if (and (or (not (setq functest
(nth 3 (car protocols
))))
1740 (funcall functest parts ctl
))
1741 (mm-find-part-by-type parts
(caar protocols
) nil t
))
1742 (setq protocol
(caar protocols
)
1744 (setq protocols
(cdr protocols
))))))
1745 (setq func
(nth 1 (assoc protocol mm-verify-function-alist
)))
1747 ((eq mm-verify-option
'never
) nil
)
1748 ((eq mm-verify-option
'always
) t
)
1749 ((eq mm-verify-option
'known
)
1751 (or (not (setq functest
1752 (nth 3 (assoc protocol
1753 mm-verify-function-alist
))))
1754 (funcall functest parts ctl
))))
1757 (format "Verify signed (%s) part? "
1758 (or (nth 2 (assoc protocol mm-verify-function-alist
))
1759 (format "protocol=%s" protocol
))))))
1762 (setq parts
(funcall func parts ctl
))
1763 (mm-set-handle-multipart-parameter
1764 mm-security-handle
'gnus-details
1765 (format "Unknown sign protocol (%s)" protocol
))))))
1766 ((equal subtype
"encrypted")
1767 (unless (setq protocol
1768 (mm-handle-multipart-ctl-parameter ctl
'protocol
))
1769 ;; The message is broken.
1770 (let ((parts parts
))
1772 (if (assoc (mm-handle-media-type (car parts
))
1773 mm-decrypt-function-alist
)
1774 (setq protocol
(mm-handle-media-type (car parts
))
1776 (setq parts
(cdr parts
))))))
1777 (setq func
(nth 1 (assoc protocol mm-decrypt-function-alist
)))
1779 ((eq mm-decrypt-option
'never
) nil
)
1780 ((eq mm-decrypt-option
'always
) t
)
1781 ((eq mm-decrypt-option
'known
)
1783 (or (not (setq functest
1784 (nth 3 (assoc protocol
1785 mm-decrypt-function-alist
))))
1786 (funcall functest parts ctl
))))
1789 (format "Decrypt (%s) part? "
1790 (or (nth 2 (assoc protocol mm-decrypt-function-alist
))
1791 (format "protocol=%s" protocol
))))))
1794 (setq parts
(funcall func parts ctl
))
1795 (mm-set-handle-multipart-parameter
1796 mm-security-handle
'gnus-details
1797 (format "Unknown encrypt protocol (%s)" protocol
))))))
1801 (defun mm-multiple-handles (handles)
1802 (and (listp handles
)
1803 (> (length handles
) 1)
1804 (or (listp (car handles
))
1805 (stringp (car handles
)))))
1807 (defun mm-complicated-handles (handles)
1808 (and (listp (car handles
))
1809 (> (length handles
) 1)))
1811 (defun mm-merge-handles (handles1 handles2
)
1813 (if (listp (car handles1
))
1816 (if (listp (car handles2
))
1820 (defun mm-readable-p (handle)
1821 "Say whether the content of HANDLE is readable."
1822 (and (< (with-current-buffer (mm-handle-buffer handle
)
1823 (buffer-size)) 10000)
1824 (mm-with-unibyte-buffer
1825 (mm-insert-part handle
)
1826 (and (eq (mm-body-7-or-8) '7bit
)
1827 (not (mm-long-lines-p 76))))))
1829 (declare-function libxml-parse-html-region
"xml.c"
1830 (start end
&optional base-url discard-comments
))
1831 (declare-function shr-insert-document
"shr" (dom))
1832 (defvar shr-blocked-images
)
1833 (defvar shr-use-fonts
)
1834 (defvar gnus-inhibit-images
)
1835 (autoload 'gnus-blocked-images
"gnus-art")
1837 (defun mm-shr (handle)
1838 ;; Require since we bind its variables.
1840 (let ((article-buffer (current-buffer))
1841 (shr-width (if (and (boundp 'shr-use-fonts
)
1845 (shr-content-function (lambda (id)
1846 (let ((handle (mm-get-content-id id
)))
1848 (mm-with-part handle
1849 (buffer-string))))))
1850 shr-inhibit-images shr-blocked-images charset char
)
1851 (if (and (boundp 'gnus-summary-buffer
)
1852 (bufferp gnus-summary-buffer
)
1853 (buffer-name gnus-summary-buffer
))
1854 (with-current-buffer gnus-summary-buffer
1855 (setq shr-inhibit-images gnus-inhibit-images
1856 shr-blocked-images
(gnus-blocked-images)))
1857 (setq shr-inhibit-images gnus-inhibit-images
1858 shr-blocked-images
(gnus-blocked-images)))
1860 (setq handle
(mm-dissect-buffer t
)))
1861 (setq charset
(mail-content-type-get (mm-handle-type handle
) 'charset
))
1863 (narrow-to-region (point) (point))
1864 (shr-insert-document
1865 (mm-with-part handle
1869 (mm-charset-to-coding-system charset
1871 (not (eq charset
'ascii
)))
1872 (mm-decode-coding-string (buffer-string) charset
)
1873 (mm-string-as-multibyte (buffer-string)))
1875 (mm-enable-multibyte)))
1876 (goto-char (point-min))
1877 (setq case-fold-search t
)
1878 (while (re-search-forward
1879 "&#\\(?:x\\([89][0-9a-f]\\)\\|\\(1[2-5][0-9]\\)\\);" nil t
)
1881 (cdr (assq (if (match-beginning 1)
1882 (string-to-number (match-string 1) 16)
1883 (string-to-number (match-string 2)))
1884 mm-extra-numeric-entities
)))
1885 (replace-match (char-to-string char
))))
1886 ;; Remove "soft hyphens".
1887 (goto-char (point-min))
1888 (while (search-forward "" nil t
)
1889 (replace-match "" t t
))
1890 (libxml-parse-html-region (point-min) (point-max))))
1893 (mm-convert-shr-links)
1894 (mm-handle-set-undisplayer
1897 (let ((inhibit-read-only t
))
1898 (delete-region ,(point-min-marker)
1899 ,(point-max-marker))))))))
1903 (autoload 'widget-convert-button
"wid-edit")
1905 (defun mm-convert-shr-links ()
1906 (let ((start (point-min))
1909 (< start
(point-max)))
1910 (when (setq start
(text-property-not-all start
(point-max) 'shr-url nil
))
1911 (setq end
(next-single-property-change start
'shr-url nil
(point-max)))
1912 (widget-convert-button
1914 :help-echo
(get-text-property start
'help-echo
)
1916 (get-text-property start
'shr-url
))
1917 (put-text-property start end
'local-map nil
)
1918 (dolist (overlay (gnus-overlays-at start
))
1919 (gnus-overlay-put overlay
'face nil
))
1920 (setq start end
)))))
1922 (defun mm-handle-filename (handle)
1923 "Return filename of HANDLE if any."
1924 (or (mail-content-type-get (mm-handle-type handle
)
1926 (mail-content-type-get (mm-handle-disposition handle
)
1929 (provide 'mm-decode
)
1935 ;;; mm-decode.el ends here