(require 'mail-parse)
(require 'mailcap)
(require 'mm-bodies)
(eval-when-compile (require 'cl)
(require 'term))
(eval-and-compile
(autoload 'executable-find "executable")
(autoload 'mm-inline-partial "mm-partial")
(autoload 'mm-inline-external-body "mm-extern")
(autoload 'mm-extern-cache-contents "mm-extern")
(autoload 'mm-insert-inline "mm-view"))
(defvar gnus-current-window-configuration)
(add-hook 'gnus-exit-gnus-hook 'mm-destroy-postponed-undisplay-list)
(defgroup mime-display ()
"Display of MIME in mail and news articles."
:link '(custom-manual "(emacs-mime)Display Customization")
:version "21.1"
:group 'mail
:group 'news
:group 'multimedia)
(defgroup mime-security ()
"MIME security in mail and news articles."
:link '(custom-manual "(emacs-mime)Display Customization")
:group 'mail
:group 'news
:group 'multimedia)
(defmacro mm-handle-buffer (handle)
`(nth 0 ,handle))
(defmacro mm-handle-type (handle)
`(nth 1 ,handle))
(defsubst mm-handle-media-type (handle)
(if (stringp (car handle))
(car handle)
(car (mm-handle-type handle))))
(defsubst mm-handle-media-supertype (handle)
(car (split-string (mm-handle-media-type handle) "/")))
(defsubst mm-handle-media-subtype (handle)
(cadr (split-string (mm-handle-media-type handle) "/")))
(defmacro mm-handle-encoding (handle)
`(nth 2 ,handle))
(defmacro mm-handle-undisplayer (handle)
`(nth 3 ,handle))
(defmacro mm-handle-set-undisplayer (handle function)
`(setcar (nthcdr 3 ,handle) ,function))
(defmacro mm-handle-disposition (handle)
`(nth 4 ,handle))
(defmacro mm-handle-description (handle)
`(nth 5 ,handle))
(defmacro mm-handle-cache (handle)
`(nth 6 ,handle))
(defmacro mm-handle-set-cache (handle contents)
`(setcar (nthcdr 6 ,handle) ,contents))
(defmacro mm-handle-id (handle)
`(nth 7 ,handle))
(defmacro mm-handle-multipart-original-buffer (handle)
`(get-text-property 0 'buffer (car ,handle)))
(defmacro mm-handle-multipart-from (handle)
`(get-text-property 0 'from (car ,handle)))
(defmacro mm-handle-multipart-ctl-parameter (handle parameter)
`(get-text-property 0 ,parameter (car ,handle)))
(defmacro mm-make-handle (&optional buffer type encoding undisplayer
disposition description cache
id)
`(list ,buffer ,type ,encoding ,undisplayer
,disposition ,description ,cache ,id))
(defcustom mm-text-html-renderer
(cond ((locate-library "w3") 'w3)
((executable-find "w3m") (if (locate-library "w3m")
'w3m
'w3m-standalone))
((executable-find "links") 'links)
((executable-find "lynx") 'lynx)
(t 'html2text))
"Render of HTML contents.
It is one of defined renderer types, or a rendering function.
The defined renderer types are:
`w3' : use Emacs/W3;
`w3m' : use emacs-w3m;
`w3m-standalone': use w3m;
`links': use links;
`lynx' : use lynx;
`html2text' : use html2text;
nil : use external viewer."
:version "22.1"
:type '(choice (const w3)
(const w3m)
(const w3m-standalone)
(const links)
(const lynx)
(const html2text)
(const nil)
(function))
:group 'mime-display)
(defvar mm-inline-text-html-renderer nil
"Function used for rendering inline HTML contents.
It is suggested to customize `mm-text-html-renderer' instead.")
(defcustom mm-inline-text-html-with-images nil
"If non-nil, Gnus will allow retrieving images in HTML contents with
the <img> tags. It has no effect on Emacs/w3. See also the
documentation for the `mm-w3m-safe-url-regexp' variable."
:version "22.1"
:type 'boolean
:group 'mime-display)
(defcustom mm-w3m-safe-url-regexp "\\`cid:"
"Regexp matching URLs which are considered to be safe.
Some HTML mails might contain a nasty trick used by spammers, using
the <img> tag which is far more evil than the [Click Here!] button.
It is most likely intended to check whether the ominous spam mail has
reached your eyes or not, in which case the spammer knows for sure
that your email address is valid. It is done by embedding an
identifier string into a URL that you might automatically retrieve
when displaying the image. The default value is \"\\\\`cid:\" which only
matches parts embedded to the Multipart/Related type MIME contents and
Gnus will never connect to the spammer's site arbitrarily. You may
set this variable to nil if you consider all urls to be safe."
:version "22.1"
:type '(choice (regexp :tag "Regexp")
(const :tag "All URLs are safe" nil))
:group 'mime-display)
(defcustom mm-inline-text-html-with-w3m-keymap t
"If non-nil, use emacs-w3m command keys in the article buffer."
:version "22.1"
:type 'boolean
:group 'mime-display)
(defcustom mm-enable-external t
"Indicate whether external MIME handlers should be used.
If t, all defined external MIME handlers are used. If nil, files are saved by
`mailcap-save-binary-file'. If it is the symbol `ask', you are prompted
before the external MIME handler is invoked."
:version "22.1"
:type '(choice (const :tag "Always" t)
(const :tag "Never" nil)
(const :tag "Ask" ask))
:group 'mime-display)
(defcustom mm-inline-media-tests
'(("image/p?jpeg"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'jpeg handle)))
("image/png"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'png handle)))
("image/gif"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'gif handle)))
("image/tiff"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'tiff handle)) )
("image/xbm"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'xbm handle)))
("image/x-xbitmap"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'xbm handle)))
("image/xpm"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'xpm handle)))
("image/x-xpixmap"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'xpm handle)))
("image/bmp"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'bmp handle)))
("image/x-portable-bitmap"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'pbm handle)))
("text/plain" mm-inline-text identity)
("text/enriched" mm-inline-text identity)
("text/richtext" mm-inline-text identity)
("text/x-patch" mm-display-patch-inline
(lambda (handle)
(fboundp 'diff-mode)))
("application/emacs-lisp" mm-display-elisp-inline identity)
("application/x-emacs-lisp" mm-display-elisp-inline identity)
("text/html"
mm-inline-text-html
(lambda (handle)
(or mm-inline-text-html-renderer
mm-text-html-renderer)))
("text/x-vcard"
mm-inline-text-vcard
(lambda (handle)
(or (featurep 'vcard)
(locate-library "vcard"))))
("message/delivery-status" mm-inline-text identity)
("message/rfc822" mm-inline-message identity)
("message/partial" mm-inline-partial identity)
("message/external-body" mm-inline-external-body identity)
("text/.*" mm-inline-text identity)
("audio/wav" mm-inline-audio
(lambda (handle)
(and (or (featurep 'nas-sound) (featurep 'native-sound))
(device-sound-enabled-p))))
("audio/au"
mm-inline-audio
(lambda (handle)
(and (or (featurep 'nas-sound) (featurep 'native-sound))
(device-sound-enabled-p))))
("application/pgp-signature" ignore identity)
("application/x-pkcs7-signature" ignore identity)
("application/pkcs7-signature" ignore identity)
("application/x-pkcs7-mime" ignore identity)
("application/pkcs7-mime" ignore identity)
("multipart/alternative" ignore identity)
("multipart/mixed" ignore identity)
("multipart/related" ignore identity)
("audio/.*" ignore ignore)
("image/.*" ignore ignore)
(".*" mm-inline-text mm-readable-p))
"Alist of media types/tests saying whether types can be displayed inline."
:type '(repeat (list (regexp :tag "MIME type")
(function :tag "Display function")
(function :tag "Display test")))
:group 'mime-display)
(defcustom mm-inlined-types
'("image/.*" "text/.*" "message/delivery-status" "message/rfc822"
"message/partial" "message/external-body" "application/emacs-lisp"
"application/x-emacs-lisp"
"application/pgp-signature" "application/x-pkcs7-signature"
"application/pkcs7-signature" "application/x-pkcs7-mime"
"application/pkcs7-mime"
"application/pgp")
"List of media types that are to be displayed inline.
See also `mm-inline-media-tests', which says how to display a media
type inline."
:type '(repeat regexp)
:group 'mime-display)
(defcustom mm-keep-viewer-alive-types
'("application/postscript" "application/msword" "application/vnd.ms-excel"
"application/pdf" "application/x-dvi")
"List of media types for which the external viewer will not be killed
when selecting a different article."
:version "22.1"
:type '(repeat regexp)
:group 'mime-display)
(defcustom mm-automatic-display
'("text/plain" "text/enriched" "text/richtext" "text/html"
"text/x-vcard" "image/.*" "message/delivery-status" "multipart/.*"
"message/rfc822" "text/x-patch" "application/pgp-signature"
"application/emacs-lisp" "application/x-emacs-lisp"
"application/x-pkcs7-signature"
"application/pkcs7-signature" "application/x-pkcs7-mime"
"application/pkcs7-mime"
"application/pgp\\'")
"A list of MIME types to be displayed automatically."
:type '(repeat regexp)
:group 'mime-display)
(defcustom mm-attachment-override-types '("text/x-vcard"
"application/pkcs7-mime"
"application/x-pkcs7-mime"
"application/pkcs7-signature"
"application/x-pkcs7-signature")
"Types to have \"attachment\" ignored if they can be displayed inline."
:type '(repeat regexp)
:group 'mime-display)
(defcustom mm-inline-override-types nil
"Types to be treated as attachments even if they can be displayed inline."
:type '(repeat regexp)
:group 'mime-display)
(defcustom mm-automatic-external-display nil
"List of MIME type regexps that will be displayed externally automatically."
:type '(repeat regexp)
:group 'mime-display)
(defcustom mm-discouraged-alternatives nil
"List of MIME types that are discouraged when viewing multipart/alternative.
Viewing agents are supposed to view the last possible part of a message,
as that is supposed to be the richest. However, users may prefer other
types instead, and this list says what types are most unwanted. If,
for instance, text/html parts are very unwanted, and text/richtext are
somewhat unwanted, then the value of this variable should be set
to:
(\"text/html\" \"text/richtext\")
Adding \"image/.*\" might also be useful. Spammers use it as the
prefered part of multipart/alternative messages. See also
`gnus-buttonized-mime-types', to which adding \"multipart/alternative\"
enables you to choose manually one of two types those mails include."
:type '(repeat regexp) :group 'mime-display)
(defcustom mm-tmp-directory
(if (fboundp 'temp-directory)
(temp-directory)
(if (boundp 'temporary-file-directory)
temporary-file-directory
"/tmp/"))
"Where mm will store its temporary files."
:type 'directory
:group 'mime-display)
(defcustom mm-inline-large-images nil
"If non-nil, then all images fit in the buffer."
:type 'boolean
:group 'mime-display)
(defvar mm-file-name-rewrite-functions
'(mm-file-name-delete-control mm-file-name-delete-gotchas)
"*List of functions used for rewriting file names of MIME parts.
Each function takes a file name as input and returns a file name.
Ready-made functions include
`mm-file-name-delete-control'
`mm-file-name-delete-gotchas'
`mm-file-name-delete-whitespace',
`mm-file-name-trim-whitespace',
`mm-file-name-collapse-whitespace',
`mm-file-name-replace-whitespace',
`capitalize', `downcase', `upcase', and
`upcase-initials'.")
(defvar mm-path-name-rewrite-functions nil
"*List of functions for rewriting the full file names of MIME parts.
This is used when viewing parts externally, and is meant for
transforming the absolute name so that non-compliant programs can find
the file where it's saved.
Each function takes a file name as input and returns a file name.")
(defvar mm-file-name-replace-whitespace nil
"String used for replacing whitespace characters; default is `\"_\"'.")
(defcustom mm-default-directory nil
"The default directory where mm will save files.
If not set, `default-directory' will be used."
:type '(choice directory (const :tag "Default" nil))
:group 'mime-display)
(defcustom mm-attachment-file-modes 384
"Set the mode bits of saved attachments to this integer."
:version "22.1"
:type 'integer
:group 'mime-display)
(defcustom mm-external-terminal-program "xterm"
"The program to start an external terminal."
:version "22.1"
:type 'string
:group 'mime-display)
(defvar mm-last-shell-command "")
(defvar mm-content-id-alist nil)
(defvar mm-postponed-undisplay-list nil)
(defvar mm-dissect-default-type "text/plain")
(autoload 'mml2015-verify "mml2015")
(autoload 'mml2015-verify-test "mml2015")
(autoload 'mml-smime-verify "mml-smime")
(autoload 'mml-smime-verify-test "mml-smime")
(defvar mm-verify-function-alist
'(("application/pgp-signature" mml2015-verify "PGP" mml2015-verify-test)
("application/x-gnus-pgp-signature" mm-uu-pgp-signed-extract-1 "PGP"
mm-uu-pgp-signed-test)
("application/pkcs7-signature" mml-smime-verify "S/MIME"
mml-smime-verify-test)
("application/x-pkcs7-signature" mml-smime-verify "S/MIME"
mml-smime-verify-test)))
(defcustom mm-verify-option 'never
"Option of verifying signed parts.
`never', not verify; `always', always verify;
`known', only verify known protocols. Otherwise, ask user."
:version "22.1"
:type '(choice (item always)
(item never)
(item :tag "only known protocols" known)
(item :tag "ask" nil))
:group 'mime-security)
(autoload 'mml2015-decrypt "mml2015")
(autoload 'mml2015-decrypt-test "mml2015")
(defvar mm-decrypt-function-alist
'(("application/pgp-encrypted" mml2015-decrypt "PGP" mml2015-decrypt-test)
("application/x-gnus-pgp-encrypted" mm-uu-pgp-encrypted-extract-1 "PGP"
mm-uu-pgp-encrypted-test)))
(defcustom mm-decrypt-option nil
"Option of decrypting encrypted parts.
`never', not decrypt; `always', always decrypt;
`known', only decrypt known protocols. Otherwise, ask user."
:version "22.1"
:type '(choice (item always)
(item never)
(item :tag "only known protocols" known)
(item :tag "ask" nil))
:group 'mime-security)
(defvar mm-viewer-completion-map
(let ((map (make-sparse-keymap 'mm-viewer-completion-map)))
(set-keymap-parent map minibuffer-local-completion-map)
(define-key map " " 'self-insert-command)
map)
"Keymap for input viewer with completion.")
(defvar mm-viewer-completion-map
(let ((map (make-sparse-keymap 'mm-viewer-completion-map)))
(set-keymap-parent map minibuffer-local-completion-map)
(define-key map " " 'self-insert-command)
map)
"Keymap for input viewer with completion.")
(defun mm-alist-to-plist (alist)
"Convert association list ALIST into the equivalent property-list form.
The plist is returned. This converts from
\((a . 1) (b . 2) (c . 3))
into
\(a 1 b 2 c 3)
The original alist is not modified. See also `destructive-alist-to-plist'."
(let (plist)
(while alist
(let ((el (car alist)))
(setq plist (cons (cdr el) (cons (car el) plist))))
(setq alist (cdr alist)))
(nreverse plist)))
(defun mm-keep-viewer-alive-p (handle)
"Say whether external viewer for HANDLE should stay alive."
(let ((types mm-keep-viewer-alive-types)
(type (mm-handle-media-type handle))
ty)
(catch 'found
(while (setq ty (pop types))
(when (string-match ty type)
(throw 'found t))))))
(defun mm-handle-set-external-undisplayer (handle function)
"Set the undisplayer for HANDLE to FUNCTION.
Postpone undisplaying of viewers for types in
`mm-keep-viewer-alive-types'."
(if (mm-keep-viewer-alive-p handle)
(let ((new-handle (copy-sequence handle)))
(mm-handle-set-undisplayer new-handle function)
(mm-handle-set-undisplayer handle nil)
(push new-handle mm-postponed-undisplay-list))
(mm-handle-set-undisplayer handle function)))
(defun mm-destroy-postponed-undisplay-list ()
(when mm-postponed-undisplay-list
(message "Destroying external MIME viewers")
(mm-destroy-parts mm-postponed-undisplay-list)))
(defun mm-dissect-buffer (&optional no-strict-mime loose-mime from)
"Dissect the current buffer and return a list of MIME handles."
(save-excursion
(let (ct ctl type subtype cte cd description id result)
(save-restriction
(mail-narrow-to-head)
(when (or no-strict-mime
loose-mime
(mail-fetch-field "mime-version"))
(setq ct (mail-fetch-field "content-type")
ctl (and ct (mail-header-parse-content-type ct))
cte (mail-fetch-field "content-transfer-encoding")
cd (mail-fetch-field "content-disposition")
description (mail-fetch-field "content-description")
id (mail-fetch-field "content-id"))
(unless from
(setq from (mail-fetch-field "from")))
(if from
(setq from (cadr (mail-extract-address-components from))))))
(when cte
(setq cte (mail-header-strip cte)))
(if (or (not ctl)
(not (string-match "/" (car ctl))))
(mm-dissect-singlepart
(list mm-dissect-default-type)
(and cte (intern (downcase (mail-header-remove-whitespace
(mail-header-remove-comments
cte)))))
no-strict-mime
(and cd (mail-header-parse-content-disposition cd))
description)
(setq type (split-string (car ctl) "/"))
(setq subtype (cadr type)
type (car type))
(setq
result
(cond
((equal type "multipart")
(let ((mm-dissect-default-type (if (equal subtype "digest")
"message/rfc822"
"text/plain"))
(start (cdr (assq 'start (cdr ctl)))))
(add-text-properties 0 (length (car ctl))
(mm-alist-to-plist (cdr ctl)) (car ctl))
(add-text-properties 0 (length (car ctl))
(list 'buffer (mm-copy-to-buffer)
'from from
'start start)
(car ctl))
(cons (car ctl) (mm-dissect-multipart ctl from))))
(t
(mm-possibly-verify-or-decrypt
(mm-dissect-singlepart
ctl
(and cte (intern (downcase (mail-header-remove-whitespace
(mail-header-remove-comments
cte)))))
no-strict-mime
(and cd (mail-header-parse-content-disposition cd))
description id)
ctl))))
(when id
(when (string-match " *<\\(.*\\)> *" id)
(setq id (match-string 1 id)))
(push (cons id result) mm-content-id-alist))
result))))
(defun mm-dissect-singlepart (ctl cte &optional force cdl description id)
(when (or force
(if (equal "text/plain" (car ctl))
(assoc 'format ctl)
t))
(mm-make-handle
(mm-copy-to-buffer) ctl cte nil cdl description nil id)))
(defun mm-dissect-multipart (ctl from)
(goto-char (point-min))
(let* ((boundary (concat "\n--" (mail-content-type-get ctl 'boundary)))
(close-delimiter (concat (regexp-quote boundary) "--[ \t]*$"))
start parts
(end (save-excursion
(goto-char (point-max))
(if (re-search-backward close-delimiter nil t)
(match-beginning 0)
(point-max)))))
(setq boundary (concat (regexp-quote boundary) "[ \t]*$"))
(while (and (< (point) end) (re-search-forward boundary end t))
(goto-char (match-beginning 0))
(when start
(save-excursion
(save-restriction
(narrow-to-region start (point))
(setq parts (nconc (list (mm-dissect-buffer t nil from)) parts)))))
(end-of-line 2)
(or (looking-at boundary)
(forward-line 1))
(setq start (point)))
(when (and start (< start end))
(save-excursion
(save-restriction
(narrow-to-region start end)
(setq parts (nconc (list (mm-dissect-buffer t nil from)) parts)))))
(mm-possibly-verify-or-decrypt (nreverse parts) ctl)))
(defun mm-copy-to-buffer ()
"Copy the contents of the current buffer to a fresh buffer."
(let ((obuf (current-buffer))
beg)
(goto-char (point-min))
(search-forward-regexp "^\n" nil t)
(setq beg (point))
(with-current-buffer
(let ((default-enable-multibyte-characters (mm-multibyte-p)))
(generate-new-buffer " *mm*"))
(insert-buffer-substring obuf beg)
(current-buffer))))
(defun mm-display-parts (handle &optional no-default)
(if (stringp (car handle))
(mapcar 'mm-display-parts (cdr handle))
(if (bufferp (car handle))
(save-restriction
(narrow-to-region (point) (point))
(mm-display-part handle)
(goto-char (point-max)))
(mapcar 'mm-display-parts handle))))
(defun mm-display-part (handle &optional no-default)
"Display the MIME part represented by HANDLE.
Returns nil if the part is removed; inline if displayed inline;
external if displayed external."
(save-excursion
(mailcap-parse-mailcaps)
(if (mm-handle-displayed-p handle)
(mm-remove-part handle)
(let* ((ehandle (if (equal (mm-handle-media-type handle)
"message/external-body")
(progn
(unless (mm-handle-cache handle)
(mm-extern-cache-contents handle))
(mm-handle-cache handle))
handle))
(type (mm-handle-media-type ehandle))
(method (mailcap-mime-info type))
(filename (or (mail-content-type-get
(mm-handle-disposition handle) 'filename)
(mail-content-type-get
(mm-handle-type handle) 'name)
"<file>"))
(external mm-enable-external))
(if (and (mm-inlinable-p ehandle)
(mm-inlined-p ehandle))
(progn
(forward-line 1)
(mm-display-inline handle)
'inline)
(when (or method
(not no-default))
(if (and (not method)
(equal "text" (car (split-string type "/"))))
(progn
(forward-line 1)
(mm-insert-inline handle (mm-get-part handle))
'inline)
(setq external
(and method (stringp method) (or (eq mm-enable-external t)
(and (eq mm-enable-external 'ask)
(y-or-n-p
(concat
"Display part (" type
") using external program"
(if (stringp method)
(concat
" \"" (format method filename) "\"")
"")
"? "))))))
(if external
(mm-display-external
handle (or method 'mailcap-save-binary-file))
(mm-display-external
handle 'mailcap-save-binary-file)))))))))
(defun mm-display-external (handle method)
"Display HANDLE using METHOD."
(let ((outbuf (current-buffer)))
(mm-with-unibyte-buffer
(if (functionp method)
(let ((cur (current-buffer)))
(if (eq method 'mailcap-save-binary-file)
(progn
(set-buffer (generate-new-buffer " *mm*"))
(setq method nil))
(mm-insert-part handle)
(let ((win (get-buffer-window cur t)))
(when win
(select-window win)))
(switch-to-buffer (generate-new-buffer " *mm*")))
(buffer-disable-undo)
(mm-set-buffer-file-coding-system mm-binary-coding-system)
(insert-buffer-substring cur)
(goto-char (point-min))
(when method
(message "Viewing with %s" method))
(let ((mm (current-buffer))
(non-viewer (assq 'non-viewer
(mailcap-mime-info
(mm-handle-media-type handle) t))))
(unwind-protect
(if method
(funcall method)
(mm-save-part handle))
(when (and (not non-viewer)
method)
(mm-handle-set-undisplayer handle mm)))))
(mm-insert-part handle)
(let* ((dir (mm-make-temp-file
(expand-file-name "emm." mm-tmp-directory) 'dir))
(filename (or
(mail-content-type-get
(mm-handle-disposition handle) 'filename)
(mail-content-type-get
(mm-handle-type handle) 'name)))
(mime-info (mailcap-mime-info
(mm-handle-media-type handle) t))
(needsterm (or (assoc "needsterm" mime-info)
(assoc "needsterminal" mime-info)))
(copiousoutput (assoc "copiousoutput" mime-info))
file buffer)
(set-file-modes dir 448)
(if filename
(setq file (expand-file-name
(gnus-map-function mm-file-name-rewrite-functions
(file-name-nondirectory filename))
dir))
(let ((suffix (cdr (assoc "nametemplate" mime-info))))
(if (and suffix
(string-match "\\`%s\\(\\..+\\)\\'" suffix))
(setq suffix (match-string 1 suffix))
(setq suffix (car (rassoc (mm-handle-media-type handle)
mailcap-mime-extensions))))
(setq file (mm-make-temp-file (expand-file-name "mm." dir)
nil suffix))))
(let ((coding-system-for-write mm-binary-coding-system))
(write-region (point-min) (point-max) file nil 'nomesg))
(message "Viewing with %s" method)
(cond
(needsterm
(let ((command (mm-mailcap-command
method file (mm-handle-type handle))))
(unwind-protect
(if window-system
(start-process "*display*" nil
mm-external-terminal-program
"-e" shell-file-name
shell-command-switch command)
(require 'term)
(require 'gnus-win)
(set-buffer
(setq buffer
(make-term "display"
shell-file-name
nil
shell-command-switch command)))
(term-mode)
(term-char-mode)
(set-process-sentinel
(get-buffer-process buffer)
`(lambda (process state)
(if (eq 'exit (process-status process))
(gnus-configure-windows
',gnus-current-window-configuration))))
(gnus-configure-windows 'display-term))
(mm-handle-set-external-undisplayer handle (cons file buffer)))
(message "Displaying %s..." command))
'external)
(copiousoutput
(with-current-buffer outbuf
(forward-line 1)
(mm-insert-inline
handle
(unwind-protect
(progn
(call-process shell-file-name nil
(setq buffer
(generate-new-buffer " *mm*"))
nil
shell-command-switch
(mm-mailcap-command
method file (mm-handle-type handle)))
(if (buffer-live-p buffer)
(with-current-buffer buffer
(buffer-string))))
(progn
(ignore-errors (delete-file file))
(ignore-errors (delete-directory
(file-name-directory file)))
(ignore-errors (kill-buffer buffer))))))
'inline)
(t
(let ((command (mm-mailcap-command
method file (mm-handle-type handle))))
(unwind-protect
(progn
(start-process "*display*"
(setq buffer
(generate-new-buffer " *mm*"))
shell-file-name
shell-command-switch command)
(set-process-sentinel
(get-buffer-process buffer)
(lexical-let ((fn `(lambda nil
(condition-case nil
(delete-file ,file)
(error))
(condition-case nil
(delete-directory
,(file-name-directory file))
(error))))
(fm `(progn
(kill-buffer ,buffer)
,(macroexpand
(list 'mm-handle-set-undisplayer
(list 'quote handle)
nil))))
(done (format "Displaying %s...done" command))
(timer (run-at-time 2.0 nil 'ignore)))
(if (boundp 'itimer-list)
(lambda (process state)
(when (eq 'exit (process-status process))
(if (memq timer itimer-list)
(set-itimer-function timer fn)
(funcall fn))
(ignore-errors (eval fm))
(message "%s" done)))
(lambda (process state)
(when (eq 'exit (process-status process))
(if (memq timer timer-list)
(timer-set-function timer fn)
(funcall fn))
(ignore-errors (eval fm))
(message "%s" done)))))))
(mm-handle-set-external-undisplayer
handle (cons file buffer)))
(message "Displaying %s..." command))
'external)))))))
(defun mm-mailcap-command (method file type-list)
(let ((ctl (cdr type-list))
(beg 0)
(uses-stdin t)
out sub total)
(while (string-match "%{\\([^}]+\\)}\\|'%s'\\|\"%s\"\\|%s\\|%t\\|%%"
method beg)
(push (substring method beg (match-beginning 0)) out)
(setq beg (match-end 0)
total (match-string 0 method)
sub (match-string 1 method))
(cond
((string= total "%%")
(push "%" out))
((or (string= total "%s")
(string= total "'%s'")
(string= total "\"%s\""))
(setq uses-stdin nil)
(push (mm-quote-arg
(gnus-map-function mm-path-name-rewrite-functions file)) out))
((string= total "%t")
(push (mm-quote-arg (car type-list)) out))
(t
(push (mm-quote-arg (or (cdr (assq (intern sub) ctl)) "")) out))))
(push (substring method beg (length method)) out)
(when uses-stdin
(push "<" out)
(push (mm-quote-arg
(gnus-map-function mm-path-name-rewrite-functions file))
out))
(mapconcat 'identity (nreverse out) "")))
(defun mm-remove-parts (handles)
"Remove the displayed MIME parts represented by HANDLES."
(if (and (listp handles)
(bufferp (car handles)))
(mm-remove-part handles)
(let (handle)
(while (setq handle (pop handles))
(cond
((stringp handle)
(when (buffer-live-p (get-text-property 0 'buffer handle))
(kill-buffer (get-text-property 0 'buffer handle))))
((and (listp handle)
(stringp (car handle)))
(mm-remove-parts (cdr handle)))
(t
(mm-remove-part handle)))))))
(defun mm-destroy-parts (handles)
"Remove the displayed MIME parts represented by HANDLES."
(if (and (listp handles)
(bufferp (car handles)))
(mm-destroy-part handles)
(let (handle)
(while (setq handle (pop handles))
(cond
((stringp handle)
(when (buffer-live-p (get-text-property 0 'buffer handle))
(kill-buffer (get-text-property 0 'buffer handle))))
((and (listp handle)
(stringp (car handle)))
(mm-destroy-parts handle))
(t
(mm-destroy-part handle)))))))
(defun mm-remove-part (handle)
"Remove the displayed MIME part represented by HANDLE."
(when (listp handle)
(let ((object (mm-handle-undisplayer handle)))
(ignore-errors
(cond
((mm-annotationp object)
(delete-annotation object))
((or (functionp object)
(and (listp object)
(eq (car object) 'lambda)))
(funcall object))
((consp object)
(condition-case ()
(while (get-buffer-process (cdr object))
(interrupt-process (get-buffer-process (cdr object)))
(message "Waiting for external displayer to die...")
(sit-for 1))
(quit)
(error))
(ignore-errors (and (cdr object) (kill-buffer (cdr object))))
(message "Waiting for external displayer to die...done")
(ignore-errors (delete-file (car object)))
(ignore-errors (delete-directory (file-name-directory
(car object)))))
((bufferp object)
(when (buffer-live-p object)
(kill-buffer object)))))
(mm-handle-set-undisplayer handle nil))))
(defun mm-display-inline (handle)
(let* ((type (mm-handle-media-type handle))
(function (cadr (mm-assoc-string-match mm-inline-media-tests type))))
(funcall function handle)
(goto-char (point-min))))
(defun mm-assoc-string-match (alist type)
(dolist (elem alist)
(when (string-match (car elem) type)
(return elem))))
(defun mm-automatic-display-p (handle)
"Say whether the user wants HANDLE to be displayed automatically."
(let ((methods mm-automatic-display)
(type (mm-handle-media-type handle))
method result)
(while (setq method (pop methods))
(when (and (not (mm-inline-override-p handle))
(string-match method type))
(setq result t
methods nil)))
result))
(defun mm-inlinable-p (handle &optional type)
"Say whether HANDLE can be displayed inline.
TYPE is the mime-type of the object; it defaults to the one given
in HANDLE."
(unless type (setq type (mm-handle-media-type handle)))
(let ((alist mm-inline-media-tests)
test)
(while alist
(when (string-match (caar alist) type)
(setq test (caddar alist)
alist nil)
(setq test (funcall test handle)))
(pop alist))
test))
(defun mm-inlined-p (handle)
"Say whether the user wants HANDLE to be displayed inline."
(let ((methods mm-inlined-types)
(type (mm-handle-media-type handle))
method result)
(while (setq method (pop methods))
(when (and (not (mm-inline-override-p handle))
(string-match method type))
(setq result t
methods nil)))
result))
(defun mm-attachment-override-p (handle)
"Say whether HANDLE should have attachment behavior overridden."
(let ((types mm-attachment-override-types)
(type (mm-handle-media-type handle))
ty)
(catch 'found
(while (setq ty (pop types))
(when (and (string-match ty type)
(mm-inlinable-p handle))
(throw 'found t))))))
(defun mm-inline-override-p (handle)
"Say whether HANDLE should have inline behavior overridden."
(let ((types mm-inline-override-types)
(type (mm-handle-media-type handle))
ty)
(catch 'found
(while (setq ty (pop types))
(when (string-match ty type)
(throw 'found t))))))
(defun mm-automatic-external-display-p (type)
"Return the user-defined method for TYPE."
(let ((methods mm-automatic-external-display)
method result)
(while (setq method (pop methods))
(when (string-match method type)
(setq result t
methods nil)))
result))
(defun mm-destroy-part (handle)
"Destroy the data structures connected to HANDLE."
(when (listp handle)
(mm-remove-part handle)
(when (buffer-live-p (mm-handle-buffer handle))
(kill-buffer (mm-handle-buffer handle)))))
(defun mm-handle-displayed-p (handle)
"Say whether HANDLE is displayed or not."
(mm-handle-undisplayer handle))
(defmacro mm-with-part (handle &rest forms)
"Run FORMS in the temp buffer containing the contents of HANDLE."
`(let* ((handle ,handle)
(default-enable-multibyte-characters
(with-current-buffer (mm-handle-buffer handle)
(mm-multibyte-p))))
(with-temp-buffer
(insert-buffer-substring (mm-handle-buffer handle))
(mm-disable-multibyte)
(mm-decode-content-transfer-encoding
(mm-handle-encoding handle)
(mm-handle-media-type handle))
,@forms)))
(put 'mm-with-part 'lisp-indent-function 1)
(put 'mm-with-part 'edebug-form-spec '(body))
(defun mm-get-part (handle &optional no-cache)
"Return the contents of HANDLE as a string.
If NO-CACHE is non-nil, cached contents of a message/external-body part
are ignored."
(if (and (not no-cache)
(equal (mm-handle-media-type handle) "message/external-body"))
(progn
(unless (mm-handle-cache handle)
(mm-extern-cache-contents handle))
(with-current-buffer (mm-handle-buffer (mm-handle-cache handle))
(buffer-string)))
(mm-with-part handle
(buffer-string))))
(defun mm-insert-part (handle &optional no-cache)
"Insert the contents of HANDLE in the current buffer.
If NO-CACHE is non-nil, cached contents of a message/external-body part
are ignored."
(save-excursion
(insert
(cond ((eq (mail-content-type-get (mm-handle-type handle) 'charset)
'gnus-decoded)
(with-current-buffer (mm-handle-buffer handle)
(buffer-string)))
((mm-multibyte-p)
(mm-string-to-multibyte (mm-get-part handle no-cache)))
(t
(mm-get-part handle no-cache))))))
(defun mm-file-name-delete-whitespace (file-name)
"Remove all whitespace characters from FILE-NAME."
(while (string-match "\\s-+" file-name)
(setq file-name (replace-match "" t t file-name)))
file-name)
(defun mm-file-name-trim-whitespace (file-name)
"Remove leading and trailing whitespace characters from FILE-NAME."
(when (string-match "\\`\\s-+" file-name)
(setq file-name (substring file-name (match-end 0))))
(when (string-match "\\s-+\\'" file-name)
(setq file-name (substring file-name 0 (match-beginning 0))))
file-name)
(defun mm-file-name-collapse-whitespace (file-name)
"Collapse multiple whitespace characters in FILE-NAME."
(while (string-match "\\s-\\s-+" file-name)
(setq file-name (replace-match " " t t file-name)))
file-name)
(defun mm-file-name-replace-whitespace (file-name)
"Replace whitespace characters in FILE-NAME with underscores.
Set the option `mm-file-name-replace-whitespace' to any other
string if you do not like underscores."
(let ((s (or mm-file-name-replace-whitespace "_")))
(while (string-match "\\s-" file-name)
(setq file-name (replace-match s t t file-name))))
file-name)
(defun mm-file-name-delete-control (filename)
"Delete control characters from FILENAME."
(gnus-replace-in-string filename "[\x00-\x1f\x7f]" ""))
(defun mm-file-name-delete-gotchas (filename)
"Delete shell gotchas from FILENAME."
(setq filename (gnus-replace-in-string filename "[<>|]" ""))
(gnus-replace-in-string filename "^[.-]+" ""))
(defun mm-save-part (handle)
"Write HANDLE to a file."
(let ((filename (or (mail-content-type-get
(mm-handle-disposition handle) 'filename)
(mail-content-type-get
(mm-handle-type handle) 'name)))
file)
(when filename
(setq filename (gnus-map-function mm-file-name-rewrite-functions
(file-name-nondirectory filename))))
(setq file
(mm-with-multibyte
(read-file-name "Save MIME part to: "
(or mm-default-directory default-directory)
nil nil (or filename ""))))
(setq mm-default-directory (file-name-directory file))
(and (or (not (file-exists-p file))
(yes-or-no-p (format "File %s already exists; overwrite? "
file)))
(progn
(mm-save-part-to-file handle file)
file))))
(defun mm-save-part-to-file (handle file)
(mm-with-unibyte-buffer
(mm-insert-part handle)
(let ((coding-system-for-write 'binary)
(current-file-modes (default-file-modes))
(inhibit-file-name-operation 'write-region)
(inhibit-file-name-handlers
(cons 'jka-compr-handler inhibit-file-name-handlers)))
(set-default-file-modes mm-attachment-file-modes)
(unwind-protect
(write-region (point-min) (point-max) file)
(set-default-file-modes current-file-modes)))))
(defun mm-pipe-part (handle)
"Pipe HANDLE to a process."
(let* ((name (mail-content-type-get (mm-handle-type handle) 'name))
(command
(read-string "Shell command on MIME part: " mm-last-shell-command)))
(mm-with-unibyte-buffer
(mm-insert-part handle)
(let ((coding-system-for-write 'binary))
(shell-command-on-region (point-min) (point-max) command nil)))))
(defun mm-interactively-view-part (handle)
"Display HANDLE using METHOD."
(let* ((type (mm-handle-media-type handle))
(methods
(mapcar (lambda (i) (list (cdr (assoc 'viewer i))))
(mailcap-mime-info type 'all)))
(method (let ((minibuffer-local-completion-map
mm-viewer-completion-map))
(completing-read "Viewer: " methods))))
(when (string= method "")
(error "No method given"))
(if (string-match "^[^% \t]+$" method)
(setq method (concat method " %s")))
(mm-display-external handle method)))
(defun mm-preferred-alternative (handles &optional preferred)
"Say which of HANDLES are preferred."
(let ((prec (if preferred (list preferred)
(mm-preferred-alternative-precedence handles)))
p h result type handle)
(while (setq p (pop prec))
(setq h handles)
(while h
(setq handle (car h))
(setq type (mm-handle-media-type handle))
(when (and (equal p type)
(mm-automatic-display-p handle)
(or (stringp (car handle))
(not (mm-handle-disposition handle))
(equal (car (mm-handle-disposition handle))
"inline")))
(setq result handle
h nil
prec nil))
(pop h)))
result))
(defun mm-preferred-alternative-precedence (handles)
"Return the precedence based on HANDLES and `mm-discouraged-alternatives'."
(let ((seq (nreverse (mapcar #'mm-handle-media-type
handles))))
(dolist (disc (reverse mm-discouraged-alternatives))
(dolist (elem (copy-sequence seq))
(when (string-match disc elem)
(setq seq (nconc (delete elem seq) (list elem))))))
seq))
(defun mm-get-content-id (id)
"Return the handle(s) referred to by ID."
(cdr (assoc id mm-content-id-alist)))
(defconst mm-image-type-regexps
'(("/\\*.*XPM.\\*/" . xpm)
("P[1-6]" . pbm)
("GIF8" . gif)
("\377\330" . jpeg)
("\211PNG\r\n" . png)
("#define" . xbm)
("\\(MM\0\\*\\)\\|\\(II\\*\0\\)" . tiff)
("%!PS" . postscript))
"Alist of (REGEXP . IMAGE-TYPE) pairs used to auto-detect image types.
When the first bytes of an image file match REGEXP, it is assumed to
be of image type IMAGE-TYPE.")
(defun mm-image-type-from-buffer ()
"Determine the image type from data in the current buffer.
Value is a symbol specifying the image type or nil if type cannot
be determined."
(let ((types mm-image-type-regexps)
type)
(goto-char (point-min))
(while (and types (null type))
(let ((regexp (car (car types)))
(image-type (cdr (car types))))
(when (looking-at regexp)
(setq type image-type))
(setq types (cdr types))))
type))
(defun mm-get-image (handle)
"Return an image instance based on HANDLE."
(let ((type (mm-handle-media-subtype handle))
spec)
(setq type
(cond
((equal type "x-pixmap")
"xpm")
((equal type "x-xbitmap")
"xbm")
((equal type "x-portable-bitmap")
"pbm")
(t type)))
(or (mm-handle-cache handle)
(mm-with-unibyte-buffer
(mm-insert-part handle)
(prog1
(setq spec
(ignore-errors
(if (fboundp 'create-image)
(create-image (buffer-string)
(or (mm-image-type-from-buffer)
(intern type))
'data-p)
(mm-create-image-xemacs type))))
(mm-handle-set-cache handle spec))))))
(defun mm-create-image-xemacs (type)
(cond
((equal type "xbm")
(let ((file (mm-make-temp-file
(expand-file-name "emm" mm-tmp-directory)
nil ".xbm")))
(unwind-protect
(progn
(write-region (point-min) (point-max) file)
(make-glyph (list (cons 'x file))))
(ignore-errors
(delete-file file)))))
(t
(make-glyph
(vector
(or (mm-image-type-from-buffer)
(intern type))
:data (buffer-string))))))
(defun mm-image-fit-p (handle)
"Say whether the image in HANDLE will fit the current window."
(let ((image (mm-get-image handle)))
(if (fboundp 'glyph-width)
(or mm-inline-large-images
(and (< (glyph-width image) (window-pixel-width))
(< (glyph-height image) (window-pixel-height))))
(let* ((size (image-size image))
(w (car size))
(h (cdr size)))
(or mm-inline-large-images
(and (< h (1- (window-height))) (< w (window-width))))))))
(defun mm-valid-image-format-p (format)
"Say whether FORMAT can be displayed natively by Emacs."
(cond
((fboundp 'valid-image-instantiator-format-p)
(valid-image-instantiator-format-p format))
((fboundp 'image-type-available-p)
(and (display-graphic-p)
(image-type-available-p format)))
(t
nil)))
(defun mm-valid-and-fit-image-p (format handle)
"Say whether FORMAT can be displayed natively and HANDLE fits the window."
(and (mm-valid-image-format-p format)
(mm-image-fit-p handle)))
(defun mm-find-part-by-type (handles type &optional notp recursive)
"Search in HANDLES for part with TYPE.
If NOTP, returns first non-matching part.
If RECURSIVE, search recursively."
(let (handle)
(while handles
(if (and recursive (stringp (caar handles)))
(if (setq handle (mm-find-part-by-type (cdar handles) type
notp recursive))
(setq handles nil))
(if (if notp
(not (equal (mm-handle-media-type (car handles)) type))
(equal (mm-handle-media-type (car handles)) type))
(setq handle (car handles)
handles nil)))
(setq handles (cdr handles)))
handle))
(defun mm-find-raw-part-by-type (ctl type &optional notp)
(goto-char (point-min))
(let* ((boundary (concat "--" (mm-handle-multipart-ctl-parameter ctl
'boundary)))
(close-delimiter (concat "^" (regexp-quote boundary) "--[ \t]*$"))
start
(end (save-excursion
(goto-char (point-max))
(if (re-search-backward close-delimiter nil t)
(match-beginning 0)
(point-max))))
result)
(setq boundary (concat "^" (regexp-quote boundary) "[ \t]*$"))
(while (and (not result)
(re-search-forward boundary end t))
(goto-char (match-beginning 0))
(when start
(save-excursion
(save-restriction
(narrow-to-region start (1- (point)))
(when (let* ((ct (mail-fetch-field "content-type"))
(ctl (and ct (mail-header-parse-content-type ct))))
(if notp
(not (equal (car ctl) type))
(equal (car ctl) type)))
(setq result (buffer-string))))))
(forward-line 1)
(setq start (point)))
(when (and (not result) start)
(save-excursion
(save-restriction
(narrow-to-region start end)
(when (let* ((ct (mail-fetch-field "content-type"))
(ctl (and ct (mail-header-parse-content-type ct))))
(if notp
(not (equal (car ctl) type))
(equal (car ctl) type)))
(setq result (buffer-string))))))
result))
(defvar mm-security-handle nil)
(defsubst mm-set-handle-multipart-parameter (handle parameter value)
(when handle
(put-text-property 0 (length (car handle)) parameter value
(car handle))))
(defun mm-possibly-verify-or-decrypt (parts ctl)
(let ((type (car ctl))
(subtype (cadr (split-string (car ctl) "/")))
(mm-security-handle ctl) protocol func functest)
(cond
((or (equal type "application/x-pkcs7-mime")
(equal type "application/pkcs7-mime"))
(with-temp-buffer
(when (and (cond
((eq mm-decrypt-option 'never) nil)
((eq mm-decrypt-option 'always) t)
((eq mm-decrypt-option 'known) t)
(t (y-or-n-p
(format "Decrypt (S/MIME) part? "))))
(mm-view-pkcs7 parts))
(setq parts (mm-dissect-buffer t)))))
((equal subtype "signed")
(unless (and (setq protocol
(mm-handle-multipart-ctl-parameter ctl 'protocol))
(not (equal protocol "multipart/mixed")))
(let ((protocols mm-verify-function-alist))
(while protocols
(if (and (or (not (setq functest (nth 3 (car protocols))))
(funcall functest parts ctl))
(mm-find-part-by-type parts (caar protocols) nil t))
(setq protocol (caar protocols)
protocols nil)
(setq protocols (cdr protocols))))))
(setq func (nth 1 (assoc protocol mm-verify-function-alist)))
(when (cond
((eq mm-verify-option 'never) nil)
((eq mm-verify-option 'always) t)
((eq mm-verify-option 'known)
(and func
(or (not (setq functest
(nth 3 (assoc protocol
mm-verify-function-alist))))
(funcall functest parts ctl))))
(t
(y-or-n-p
(format "Verify signed (%s) part? "
(or (nth 2 (assoc protocol mm-verify-function-alist))
(format "protocol=%s" protocol))))))
(save-excursion
(if func
(funcall func parts ctl)
(mm-set-handle-multipart-parameter
mm-security-handle 'gnus-details
(format "Unknown sign protocol (%s)" protocol))))))
((equal subtype "encrypted")
(unless (setq protocol
(mm-handle-multipart-ctl-parameter ctl 'protocol))
(let ((parts parts))
(while parts
(if (assoc (mm-handle-media-type (car parts))
mm-decrypt-function-alist)
(setq protocol (mm-handle-media-type (car parts))
parts nil)
(setq parts (cdr parts))))))
(setq func (nth 1 (assoc protocol mm-decrypt-function-alist)))
(when (cond
((eq mm-decrypt-option 'never) nil)
((eq mm-decrypt-option 'always) t)
((eq mm-decrypt-option 'known)
(and func
(or (not (setq functest
(nth 3 (assoc protocol
mm-decrypt-function-alist))))
(funcall functest parts ctl))))
(t
(y-or-n-p
(format "Decrypt (%s) part? "
(or (nth 2 (assoc protocol mm-decrypt-function-alist))
(format "protocol=%s" protocol))))))
(save-excursion
(if func
(setq parts (funcall func parts ctl))
(mm-set-handle-multipart-parameter
mm-security-handle 'gnus-details
(format "Unknown encrypt protocol (%s)" protocol))))))
(t nil))
parts))
(defun mm-multiple-handles (handles)
(and (listp handles)
(> (length handles) 1)
(or (listp (car handles))
(stringp (car handles)))))
(defun mm-complicated-handles (handles)
(and (listp (car handles))
(> (length handles) 1)))
(defun mm-merge-handles (handles1 handles2)
(append
(if (listp (car handles1))
handles1
(list handles1))
(if (listp (car handles2))
handles2
(list handles2))))
(defun mm-readable-p (handle)
"Say whether the content of HANDLE is readable."
(and (< (with-current-buffer (mm-handle-buffer handle)
(buffer-size)) 10000)
(mm-with-unibyte-buffer
(mm-insert-part handle)
(and (eq (mm-body-7-or-8) '7bit)
(not (mm-long-lines-p 76))))))
(provide 'mm-decode)