1 ;;; mm-decode.el --- Functions for decoding MIME things
2 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 ;; 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 2, or (at your option)
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; see the file COPYING. If not, write to the
21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 ;; Boston, MA 02111-1307, USA.
31 (eval-when-compile (require 'cl)
35 (autoload 'executable-find "executable")
36 (autoload 'mm-inline-partial "mm-partial")
37 (autoload 'mm-inline-external-body "mm-extern")
38 (autoload 'mm-insert-inline "mm-view"))
40 (add-hook 'gnus-exit-gnus-hook 'mm-destroy-postponed-undisplay-list)
42 (defgroup mime-display ()
43 "Display of MIME in mail and news articles."
44 :link '(custom-manual "(emacs-mime)Customization")
50 (defgroup mime-security ()
51 "MIME security in mail and news articles."
52 :link '(custom-manual "(emacs-mime)Customization")
57 ;;; Convenience macros.
59 (defmacro mm-handle-buffer (handle)
61 (defmacro mm-handle-type (handle)
63 (defsubst mm-handle-media-type (handle)
64 (if (stringp (car handle))
66 (car (mm-handle-type handle))))
67 (defsubst mm-handle-media-supertype (handle)
68 (car (split-string (mm-handle-media-type handle) "/")))
69 (defsubst mm-handle-media-subtype (handle)
70 (cadr (split-string (mm-handle-media-type handle) "/")))
71 (defmacro mm-handle-encoding (handle)
73 (defmacro mm-handle-undisplayer (handle)
75 (defmacro mm-handle-set-undisplayer (handle function)
76 `(setcar (nthcdr 3 ,handle) ,function))
77 (defmacro mm-handle-disposition (handle)
79 (defmacro mm-handle-description (handle)
81 (defmacro mm-handle-cache (handle)
83 (defmacro mm-handle-set-cache (handle contents)
84 `(setcar (nthcdr 6 ,handle) ,contents))
85 (defmacro mm-handle-id (handle)
87 (defmacro mm-handle-multipart-original-buffer (handle)
88 `(get-text-property 0 'buffer (car ,handle)))
89 (defmacro mm-handle-multipart-from (handle)
90 `(get-text-property 0 'from (car ,handle)))
91 (defmacro mm-handle-multipart-ctl-parameter (handle parameter)
92 `(get-text-property 0 ,parameter (car ,handle)))
94 (defmacro mm-make-handle (&optional buffer type encoding undisplayer
95 disposition description cache
97 `(list ,buffer ,type ,encoding ,undisplayer
98 ,disposition ,description ,cache ,id))
100 (defcustom mm-text-html-renderer
101 (cond ((locate-library "w3") 'w3)
102 ((locate-library "w3m") 'w3m)
103 ((executable-find "w3m") 'w3m-standalone)
104 ((executable-find "links") 'links)
105 ((executable-find "lynx") 'lynx)
107 "Render of HTML contents.
108 It is one of defined renderer types, or a rendering function.
109 The defined renderer types are:
111 `w3m' : use emacs-w3m;
112 `w3m-standalone': use w3m;
115 `html2text' : use html2text;
116 nil : use external viewer."
117 :type '(choice (const w3)
119 (const w3m-standalone)
126 :group 'mime-display)
128 (defvar mm-inline-text-html-renderer nil
129 "Function used for rendering inline HTML contents.
130 It is suggested to customize `mm-text-html-renderer' instead.")
132 (defcustom mm-inline-text-html-with-images nil
133 "If non-nil, Gnus will allow retrieving images in HTML contents with
134 the <img> tags. It has no effect on Emacs/w3. See also the
135 documentation for the `mm-w3m-safe-url-regexp' variable."
137 :group 'mime-display)
139 (defcustom mm-w3m-safe-url-regexp "\\`cid:"
140 "Regexp matching URLs which are considered to be safe.
141 Some HTML mails might contain a nasty trick used by spammers, using
142 the <img> tag which is far more evil than the [Click Here!] button.
143 It is most likely intended to check whether the ominous spam mail has
144 reached your eyes or not, in which case the spammer knows for sure
145 that your email address is valid. It is done by embedding an
146 identifier string into a URL that you might automatically retrieve
147 when displaying the image. The default value is \"\\\\`cid:\" which only
148 matches parts embedded to the Multipart/Related type MIME contents and
149 Gnus will never connect to the spammer's site arbitrarily. You may
150 set this variable to nil if you consider all urls to be safe."
151 :type '(choice (regexp :tag "Regexp")
152 (const :tag "All URLs are safe" nil))
153 :group 'mime-display)
155 (defcustom mm-inline-text-html-with-w3m-keymap t
156 "If non-nil, use emacs-w3m command keys in the article buffer."
158 :group 'mime-display)
160 (defcustom mm-enable-external t
161 "Indicate whether external MIME handlers should be used.
163 If t, all defined external MIME handlers are used. If nil, files are saved by
164 `mailcap-save-binary-file'. If it is the symbol `ask', you are prompted
165 before the external MIME handler is invoked."
167 :type '(choice (const :tag "Always" t)
168 (const :tag "Never" nil)
169 (const :tag "Ask" ask))
170 :group 'mime-display)
172 (defcustom mm-inline-media-tests
176 (mm-valid-and-fit-image-p 'jpeg handle)))
180 (mm-valid-and-fit-image-p 'png handle)))
184 (mm-valid-and-fit-image-p 'gif handle)))
188 (mm-valid-and-fit-image-p 'tiff handle)) )
192 (mm-valid-and-fit-image-p 'xbm handle)))
196 (mm-valid-and-fit-image-p 'xbm handle)))
200 (mm-valid-and-fit-image-p 'xpm handle)))
204 (mm-valid-and-fit-image-p 'xpm handle)))
208 (mm-valid-and-fit-image-p 'bmp handle)))
209 ("image/x-portable-bitmap"
212 (mm-valid-and-fit-image-p 'pbm handle)))
213 ("text/plain" mm-inline-text identity)
214 ("text/enriched" mm-inline-text identity)
215 ("text/richtext" mm-inline-text identity)
216 ("text/x-patch" mm-display-patch-inline
218 (locate-library "diff-mode")))
219 ("application/emacs-lisp" mm-display-elisp-inline identity)
220 ("application/x-emacs-lisp" mm-display-elisp-inline identity)
224 (or mm-inline-text-html-renderer
225 mm-text-html-renderer)))
229 (or (featurep 'vcard)
230 (locate-library "vcard"))))
231 ("message/delivery-status" mm-inline-text identity)
232 ("message/rfc822" mm-inline-message identity)
233 ("message/partial" mm-inline-partial identity)
234 ("message/external-body" mm-inline-external-body identity)
235 ("text/.*" mm-inline-text identity)
236 ("audio/wav" mm-inline-audio
238 (and (or (featurep 'nas-sound) (featurep 'native-sound))
239 (device-sound-enabled-p))))
243 (and (or (featurep 'nas-sound) (featurep 'native-sound))
244 (device-sound-enabled-p))))
245 ("application/pgp-signature" ignore identity)
246 ("application/x-pkcs7-signature" ignore identity)
247 ("application/pkcs7-signature" ignore identity)
248 ("application/x-pkcs7-mime" ignore identity)
249 ("application/pkcs7-mime" ignore identity)
250 ("multipart/alternative" ignore identity)
251 ("multipart/mixed" ignore identity)
252 ("multipart/related" ignore identity)
253 ;; Disable audio and image
254 ("audio/.*" ignore ignore)
255 ("image/.*" ignore ignore)
256 ;; Default to displaying as text
257 (".*" mm-inline-text mm-readable-p))
258 "Alist of media types/tests saying whether types can be displayed inline."
259 :type '(repeat (list (regexp :tag "MIME type")
260 (function :tag "Display function")
261 (function :tag "Display test")))
262 :group 'mime-display)
264 (defcustom mm-inlined-types
265 '("image/.*" "text/.*" "message/delivery-status" "message/rfc822"
266 "message/partial" "message/external-body" "application/emacs-lisp"
267 "application/x-emacs-lisp"
268 "application/pgp-signature" "application/x-pkcs7-signature"
269 "application/pkcs7-signature" "application/x-pkcs7-mime"
270 "application/pkcs7-mime")
271 "List of media types that are to be displayed inline.
272 See also `mm-inline-media-tests', which says how to display a media
274 :type '(repeat string)
275 :group 'mime-display)
277 (defcustom mm-keep-viewer-alive-types
278 '("application/postscript" "application/msword" "application/vnd.ms-excel"
279 "application/pdf" "application/x-dvi")
280 "List of media types for which the external viewer will not be killed
281 when selecting a different article."
282 :type '(repeat string)
283 :group 'mime-display)
285 (defcustom mm-automatic-display
286 '("text/plain" "text/enriched" "text/richtext" "text/html"
287 "text/x-vcard" "image/.*" "message/delivery-status" "multipart/.*"
288 "message/rfc822" "text/x-patch" "application/pgp-signature"
289 "application/emacs-lisp" "application/x-emacs-lisp"
290 "application/x-pkcs7-signature"
291 "application/pkcs7-signature" "application/x-pkcs7-mime"
292 "application/pkcs7-mime")
293 "A list of MIME types to be displayed automatically."
294 :type '(repeat string)
295 :group 'mime-display)
297 (defcustom mm-attachment-override-types '("text/x-vcard"
298 "application/pkcs7-mime"
299 "application/x-pkcs7-mime"
300 "application/pkcs7-signature"
301 "application/x-pkcs7-signature")
302 "Types to have \"attachment\" ignored if they can be displayed inline."
303 :type '(repeat string)
304 :group 'mime-display)
306 (defcustom mm-inline-override-types nil
307 "Types to be treated as attachments even if they can be displayed inline."
308 :type '(repeat string)
309 :group 'mime-display)
311 (defcustom mm-automatic-external-display nil
312 "List of MIME type regexps that will be displayed externally automatically."
313 :type '(repeat string)
314 :group 'mime-display)
316 (defcustom mm-discouraged-alternatives nil
317 "List of MIME types that are discouraged when viewing multipart/alternative.
318 Viewing agents are supposed to view the last possible part of a message,
319 as that is supposed to be the richest. However, users may prefer other
320 types instead, and this list says what types are most unwanted. If,
321 for instance, text/html parts are very unwanted, and text/richtext are
322 somewhat unwanted, then the value of this variable should be set
325 (\"text/html\" \"text/richtext\")"
326 :type '(repeat string)
327 :group 'mime-display)
329 (defcustom mm-tmp-directory
330 (if (fboundp 'temp-directory)
332 (if (boundp 'temporary-file-directory)
333 temporary-file-directory
335 "Where mm will store its temporary files."
337 :group 'mime-display)
339 (defcustom mm-inline-large-images nil
340 "If non-nil, then all images fit in the buffer."
342 :group 'mime-display)
344 (defvar mm-file-name-rewrite-functions
345 '(mm-file-name-delete-control mm-file-name-delete-gotchas)
346 "*List of functions used for rewriting file names of MIME parts.
347 Each function takes a file name as input and returns a file name.
349 Ready-made functions include
350 `mm-file-name-delete-control'
351 `mm-file-name-delete-gotchas'
352 `mm-file-name-delete-whitespace',
353 `mm-file-name-trim-whitespace',
354 `mm-file-name-collapse-whitespace',
355 `mm-file-name-replace-whitespace',
356 `capitalize', `downcase', `upcase', and
359 (defvar mm-path-name-rewrite-functions nil
360 "*List of functions for rewriting the full file names of MIME parts.
361 This is used when viewing parts externally, and is meant for
362 transforming the absolute name so that non-compliant programs can find
363 the file where it's saved.
365 Each function takes a file name as input and returns a file name.")
367 (defvar mm-file-name-replace-whitespace nil
368 "String used for replacing whitespace characters; default is `\"_\"'.")
370 (defcustom mm-default-directory nil
371 "The default directory where mm will save files.
372 If not set, `default-directory' will be used."
373 :type '(choice directory (const :tag "Default" nil))
374 :group 'mime-display)
376 (defcustom mm-attachment-file-modes 384
377 "Set the mode bits of saved attachments to this integer."
379 :group 'mime-display)
381 (defcustom mm-external-terminal-program "xterm"
382 "The program to start an external terminal."
384 :group 'mime-display)
386 ;;; Internal variables.
388 (defvar mm-last-shell-command "")
389 (defvar mm-content-id-alist nil)
390 (defvar mm-postponed-undisplay-list nil)
392 ;; According to RFC2046, in particular, in a digest, the default
393 ;; Content-Type value for a body part is changed from "text/plain" to
395 (defvar mm-dissect-default-type "text/plain")
397 (autoload 'mml2015-verify "mml2015")
398 (autoload 'mml2015-verify-test "mml2015")
399 (autoload 'mml-smime-verify "mml-smime")
400 (autoload 'mml-smime-verify-test "mml-smime")
402 (defvar mm-verify-function-alist
403 '(("application/pgp-signature" mml2015-verify "PGP" mml2015-verify-test)
404 ("application/x-gnus-pgp-signature" mm-uu-pgp-signed-extract-1 "PGP"
405 mm-uu-pgp-signed-test)
406 ("application/pkcs7-signature" mml-smime-verify "S/MIME"
407 mml-smime-verify-test)
408 ("application/x-pkcs7-signature" mml-smime-verify "S/MIME"
409 mml-smime-verify-test)))
411 (defcustom mm-verify-option 'never
412 "Option of verifying signed parts.
413 `never', not verify; `always', always verify;
414 `known', only verify known protocols. Otherwise, ask user."
415 :type '(choice (item always)
417 (item :tag "only known protocols" known)
418 (item :tag "ask" nil))
419 :group 'mime-security)
421 (autoload 'mml2015-decrypt "mml2015")
422 (autoload 'mml2015-decrypt-test "mml2015")
424 (defvar mm-decrypt-function-alist
425 '(("application/pgp-encrypted" mml2015-decrypt "PGP" mml2015-decrypt-test)
426 ("application/x-gnus-pgp-encrypted" mm-uu-pgp-encrypted-extract-1 "PGP"
427 mm-uu-pgp-encrypted-test)))
429 (defcustom mm-decrypt-option nil
430 "Option of decrypting encrypted parts.
431 `never', not decrypt; `always', always decrypt;
432 `known', only decrypt known protocols. Otherwise, ask user."
433 :type '(choice (item always)
435 (item :tag "only known protocols" known)
436 (item :tag "ask" nil))
437 :group 'mime-security)
439 (defvar mm-viewer-completion-map
440 (let ((map (make-sparse-keymap 'mm-viewer-completion-map)))
441 (set-keymap-parent map minibuffer-local-completion-map)
443 "Keymap for input viewer with completion.")
445 ;; Should we bind other key to minibuffer-complete-word?
446 (define-key mm-viewer-completion-map " " 'self-insert-command)
448 (defvar mm-viewer-completion-map
449 (let ((map (make-sparse-keymap 'mm-viewer-completion-map)))
450 (set-keymap-parent map minibuffer-local-completion-map)
452 "Keymap for input viewer with completion.")
454 ;; Should we bind other key to minibuffer-complete-word?
455 (define-key mm-viewer-completion-map " " 'self-insert-command)
459 (defun mm-alist-to-plist (alist)
460 "Convert association list ALIST into the equivalent property-list form.
461 The plist is returned. This converts from
463 \((a . 1) (b . 2) (c . 3))
469 The original alist is not modified. See also `destructive-alist-to-plist'."
472 (let ((el (car alist)))
473 (setq plist (cons (cdr el) (cons (car el) plist))))
474 (setq alist (cdr alist)))
477 (defun mm-keep-viewer-alive-p (handle)
478 "Say whether external viewer for HANDLE should stay alive."
479 (let ((types mm-keep-viewer-alive-types)
480 (type (mm-handle-media-type handle))
483 (while (setq ty (pop types))
484 (when (string-match ty type)
485 (throw 'found t))))))
487 (defun mm-handle-set-external-undisplayer (handle function)
488 "Set the undisplayer for HANDLE to FUNCTION.
489 Postpone undisplaying of viewers for types in
490 `mm-keep-viewer-alive-types'."
491 (if (mm-keep-viewer-alive-p handle)
492 (let ((new-handle (copy-sequence handle)))
493 (mm-handle-set-undisplayer new-handle function)
494 (mm-handle-set-undisplayer handle nil)
495 (push new-handle mm-postponed-undisplay-list))
496 (mm-handle-set-undisplayer handle function)))
498 (defun mm-destroy-postponed-undisplay-list ()
499 (when mm-postponed-undisplay-list
500 (message "Destroying external MIME viewers")
501 (mm-destroy-parts mm-postponed-undisplay-list)))
503 (defun mm-dissect-buffer (&optional no-strict-mime loose-mime)
504 "Dissect the current buffer and return a list of MIME handles."
506 (let (ct ctl type subtype cte cd description id result from)
508 (mail-narrow-to-head)
509 (when (or no-strict-mime
511 (mail-fetch-field "mime-version"))
512 (setq ct (mail-fetch-field "content-type")
513 ctl (ignore-errors (mail-header-parse-content-type ct))
514 cte (mail-fetch-field "content-transfer-encoding")
515 cd (mail-fetch-field "content-disposition")
516 description (mail-fetch-field "content-description")
517 from (mail-fetch-field "from")
518 id (mail-fetch-field "content-id"))
519 ;; FIXME: In some circumstances, this code is running within
520 ;; an unibyte macro. mail-extract-address-components
521 ;; creates unibyte buffers. This `if', though not a perfect
522 ;; solution, avoids most of them.
524 (setq from (cadr (mail-extract-address-components from))))))
526 (setq cte (mail-header-strip cte)))
528 (not (string-match "/" (car ctl))))
529 (mm-dissect-singlepart
530 (list mm-dissect-default-type)
531 (and cte (intern (downcase (mail-header-remove-whitespace
532 (mail-header-remove-comments
535 (and cd (ignore-errors (mail-header-parse-content-disposition cd)))
537 (setq type (split-string (car ctl) "/"))
538 (setq subtype (cadr type)
543 ((equal type "multipart")
544 (let ((mm-dissect-default-type (if (equal subtype "digest")
547 (start (cdr (assq 'start (cdr ctl)))))
548 (add-text-properties 0 (length (car ctl))
549 (mm-alist-to-plist (cdr ctl)) (car ctl))
551 ;; what really needs to be done here is a way to link a
552 ;; MIME handle back to it's parent MIME handle (in a multilevel
553 ;; MIME article). That would probably require changing
554 ;; the mm-handle API so we simply store the multipart buffert
555 ;; name as a text property of the "multipart/whatever" string.
556 (add-text-properties 0 (length (car ctl))
557 (list 'buffer (mm-copy-to-buffer)
561 (cons (car ctl) (mm-dissect-multipart ctl))))
563 (mm-possibly-verify-or-decrypt
564 (mm-dissect-singlepart
566 (and cte (intern (downcase (mail-header-remove-whitespace
567 (mail-header-remove-comments
570 (and cd (ignore-errors
571 (mail-header-parse-content-disposition cd)))
575 (when (string-match " *<\\(.*\\)> *" id)
576 (setq id (match-string 1 id)))
577 (push (cons id result) mm-content-id-alist))
580 (defun mm-dissect-singlepart (ctl cte &optional force cdl description id)
582 (if (equal "text/plain" (car ctl))
586 (mm-copy-to-buffer) ctl cte nil cdl description nil id)))
588 (defun mm-dissect-multipart (ctl)
589 (goto-char (point-min))
590 (let* ((boundary (concat "\n--" (mail-content-type-get ctl 'boundary)))
591 (close-delimiter (concat (regexp-quote boundary) "--[ \t]*$"))
594 (goto-char (point-max))
595 (if (re-search-backward close-delimiter nil t)
598 (setq boundary (concat (regexp-quote boundary) "[ \t]*$"))
599 (while (and (< (point) end) (re-search-forward boundary end t))
600 (goto-char (match-beginning 0))
604 (narrow-to-region start (point))
605 (setq parts (nconc (list (mm-dissect-buffer t)) parts)))))
607 (or (looking-at boundary)
609 (setq start (point)))
610 (when (and start (< start end))
613 (narrow-to-region start end)
614 (setq parts (nconc (list (mm-dissect-buffer t)) parts)))))
615 (mm-possibly-verify-or-decrypt (nreverse parts) ctl)))
617 (defun mm-copy-to-buffer ()
618 "Copy the contents of the current buffer to a fresh buffer."
620 (let ((obuf (current-buffer))
622 (goto-char (point-min))
623 (search-forward-regexp "^\n" nil t)
625 (set-buffer (generate-new-buffer " *mm*"))
626 (insert-buffer-substring obuf beg)
629 (defun mm-display-parts (handle &optional no-default)
630 (if (stringp (car handle))
631 (mapcar 'mm-display-parts (cdr handle))
632 (if (bufferp (car handle))
634 (narrow-to-region (point) (point))
635 (mm-display-part handle)
636 (goto-char (point-max)))
637 (mapcar 'mm-display-parts handle))))
639 (defun mm-display-part (handle &optional no-default)
640 "Display the MIME part represented by HANDLE.
641 Returns nil if the part is removed; inline if displayed inline;
642 external if displayed external."
644 (mailcap-parse-mailcaps)
645 (if (mm-handle-displayed-p handle)
646 (mm-remove-part handle)
647 (let* ((type (mm-handle-media-type handle))
648 (method (mailcap-mime-info type))
649 (filename (or (mail-content-type-get
650 (mm-handle-disposition handle) 'filename)
651 (mail-content-type-get
652 (mm-handle-type handle) 'name)
654 (external mm-enable-external))
655 (if (and (mm-inlinable-p handle)
656 (mm-inlined-p handle))
659 (mm-display-inline handle)
663 (if (and (not method)
664 (equal "text" (car (split-string type))))
667 (mm-insert-inline handle (mm-get-part handle))
669 (if (and method ;; If nil, we always use "save".
670 (stringp method) ;; 'mailcap-save-binary-file
671 (or (eq mm-enable-external t)
672 (and (eq mm-enable-external 'ask)
675 "Display part (" type
676 ") using external program"
677 ;; Can non-string method ever happen?
680 " \"" (format method filename) "\"")
687 handle (or method 'mailcap-save-binary-file))
689 handle 'mailcap-save-binary-file)))))))))
691 (defun mm-display-external (handle method)
692 "Display HANDLE using METHOD."
693 (let ((outbuf (current-buffer)))
694 (mm-with-unibyte-buffer
695 (if (functionp method)
696 (let ((cur (current-buffer)))
697 (if (eq method 'mailcap-save-binary-file)
699 (set-buffer (generate-new-buffer " *mm*"))
701 (mm-insert-part handle)
702 (let ((win (get-buffer-window cur t)))
704 (select-window win)))
705 (switch-to-buffer (generate-new-buffer " *mm*")))
706 (buffer-disable-undo)
707 (mm-set-buffer-file-coding-system mm-binary-coding-system)
708 (insert-buffer-substring cur)
709 (goto-char (point-min))
711 (message "Viewing with %s" method))
712 (let ((mm (current-buffer))
713 (non-viewer (assq 'non-viewer
715 (mm-handle-media-type handle) t))))
719 (mm-save-part handle))
720 (when (and (not non-viewer)
722 (mm-handle-set-undisplayer handle mm)))))
723 ;; The function is a string to be executed.
724 (mm-insert-part handle)
725 (let* ((dir (mm-make-temp-file
726 (expand-file-name "emm." mm-tmp-directory) 'dir))
728 (mail-content-type-get
729 (mm-handle-disposition handle) 'filename)
730 (mail-content-type-get
731 (mm-handle-type handle) 'name)))
732 (mime-info (mailcap-mime-info
733 (mm-handle-media-type handle) t))
734 (needsterm (or (assoc "needsterm" mime-info)
735 (assoc "needsterminal" mime-info)))
736 (copiousoutput (assoc "copiousoutput" mime-info))
738 ;; We create a private sub-directory where we store our files.
739 (set-file-modes dir 448)
741 (setq file (expand-file-name
742 (gnus-map-function mm-file-name-rewrite-functions
743 (file-name-nondirectory filename))
745 (setq file (mm-make-temp-file (expand-file-name "mm." dir))))
746 (let ((coding-system-for-write mm-binary-coding-system))
747 (write-region (point-min) (point-max) file nil 'nomesg))
748 (message "Viewing with %s" method)
751 (let ((command (mm-mailcap-command
752 method file (mm-handle-type handle))))
755 (start-process "*display*" nil
756 mm-external-terminal-program
758 shell-command-switch command)
766 shell-command-switch command)))
769 (set-process-sentinel
770 (get-buffer-process buffer)
771 `(lambda (process state)
772 (if (eq 'exit (process-status process))
773 (gnus-configure-windows
774 ',gnus-current-window-configuration))))
775 (gnus-configure-windows 'display-term))
776 (mm-handle-set-external-undisplayer handle (cons file buffer)))
777 (message "Displaying %s..." command))
780 (with-current-buffer outbuf
786 (call-process shell-file-name nil
788 (generate-new-buffer " *mm*"))
792 method file (mm-handle-type handle)))
793 (if (buffer-live-p buffer)
798 (ignore-errors (delete-file file))
799 (ignore-errors (delete-directory
800 (file-name-directory file)))
801 (ignore-errors (kill-buffer buffer))))))
804 (let ((command (mm-mailcap-command
805 method file (mm-handle-type handle))))
807 (start-process "*display*"
809 (generate-new-buffer " *mm*"))
811 shell-command-switch command)
812 (mm-handle-set-external-undisplayer
813 handle (cons file buffer)))
814 (message "Displaying %s..." command))
817 (defun mm-mailcap-command (method file type-list)
818 (let ((ctl (cdr type-list))
822 (while (string-match "%{\\([^}]+\\)}\\|'%s'\\|\"%s\"\\|%s\\|%t\\|%%"
824 (push (substring method beg (match-beginning 0)) out)
825 (setq beg (match-end 0)
826 total (match-string 0 method)
827 sub (match-string 1 method))
829 ((string= total "%%")
831 ((or (string= total "%s")
832 ;; We do our own quoting.
833 (string= total "'%s'")
834 (string= total "\"%s\""))
835 (setq uses-stdin nil)
837 (gnus-map-function mm-path-name-rewrite-functions file)) out))
838 ((string= total "%t")
839 (push (mm-quote-arg (car type-list)) out))
841 (push (mm-quote-arg (or (cdr (assq (intern sub) ctl)) "")) out))))
842 (push (substring method beg (length method)) out)