;;; mm-decode.el --- Functions for decoding MIME things
-;; Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
+;; Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
;;; Commentary:
-;; Jaap-Henk Hoepman (jhh@xs4all.nl):
-;;
-;; Added support for delayed destroy of external MIME viewers. All external
-;; viewers for mime types in mm-keep-viewer-alive-types will remain active
-;; after switching articles or groups, and will only be removed when exiting
-;; gnus.
-;;
-
;;; Code:
(require 'mail-parse)
(require 'term))
(eval-and-compile
+ (autoload 'executable-find "executable")
(autoload 'mm-inline-partial "mm-partial")
(autoload 'mm-inline-external-body "mm-extern")
(autoload 'mm-insert-inline "mm-view"))
`(list ,buffer ,type ,encoding ,undisplayer
,disposition ,description ,cache ,id))
+(defcustom mm-text-html-renderer
+ (cond ((locate-library "w3") 'w3)
+ ((locate-library "w3m") 'w3m)
+ ((executable-find "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."
+ :type '(choice (const w3)
+ (const w3m)
+ (const w3m-standalone)
+ (const links)
+ (const lynx)
+ (const html2text)
+ (const nil)
+ (function))
+ :version "21.3"
+ :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."
+ :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."
+ :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."
+ :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 "21.4"
+ :type '(choice (const :tag "Always" t)
+ (const :tag "Never" nil)
+ (const :tag "Ask" ask))
+ :group 'mime-display)
+
(defcustom mm-inline-media-tests
- '(("image/jpeg"
+ '(("image/p?jpeg"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'jpeg handle)))
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'xpm handle)))
- ("image/x-pixmap"
+ ("image/x-xpixmap"
mm-inline-image
(lambda (handle)
(mm-valid-and-fit-image-p 'xpm handle)))
(lambda (handle)
(locate-library "diff-mode")))
("application/emacs-lisp" mm-display-elisp-inline identity)
+ ("application/x-emacs-lisp" mm-display-elisp-inline identity)
("text/html"
- mm-inline-text
+ mm-inline-text-html
(lambda (handle)
- (locate-library "w3")))
+ (or mm-inline-text-html-renderer
+ mm-text-html-renderer)))
("text/x-vcard"
- mm-inline-text
+ mm-inline-text-vcard
(lambda (handle)
(or (featurep 'vcard)
(locate-library "vcard"))))
("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)
+ ;; Disable audio and image
+ ("audio/.*" ignore ignore)
+ ("image/.*" ignore ignore)
;; Default to displaying as text
- (".*" mm-inline-text identity))
+ (".*" mm-inline-text mm-readable-p))
"Alist of media types/tests saying whether types can be displayed inline."
- :type '(repeat (list (string :tag "MIME type")
+ :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/pkcs7-signature" "application/x-pkcs7-mime"
+ "application/pkcs7-mime")
"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."
'("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-pkcs7-signature"
- "application/pkcs7-signature")
+ "application/emacs-lisp" "application/x-emacs-lisp"
+ "application/x-pkcs7-signature"
+ "application/pkcs7-signature" "application/x-pkcs7-mime"
+ "application/pkcs7-mime")
"A list of MIME types to be displayed automatically."
:type '(repeat string)
:group 'mime-display)
-(defcustom mm-attachment-override-types '("text/x-vcard")
+(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 string)
:group 'mime-display)
:group 'mime-display)
(defcustom mm-tmp-directory
- (cond ((fboundp 'temp-directory) (temp-directory))
- ((boundp 'temporary-file-directory) temporary-file-directory)
- ("/tmp/"))
+ (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)
:type 'boolean
:group 'mime-display)
-(defvar mm-file-name-rewrite-functions nil
+(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',
`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 'directory
+ :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."
+ :type 'integer
:group 'mime-display)
(defcustom mm-external-terminal-program "xterm"
;;; Internal variables.
-(defvar mm-dissection-list nil)
(defvar mm-last-shell-command "")
(defvar mm-content-id-alist nil)
(defvar mm-postponed-undisplay-list nil)
(defcustom mm-verify-option 'never
"Option of verifying signed parts.
`never', not verify; `always', always verify;
-`known', only verify known protocols. Otherwise, ask user."
+`known', only verify known protocols. Otherwise, ask user."
:type '(choice (item always)
(item never)
(item :tag "only known protocols" known)
(defcustom mm-decrypt-option nil
"Option of decrypting encrypted parts.
`never', not decrypt; `always', always decrypt;
-`known', only decrypt known protocols. Otherwise, ask user."
+`known', only decrypt known protocols. Otherwise, ask user."
:type '(choice (item always)
(item never)
(item :tag "only known protocols" known)
(throw 'found t))))))
(defun mm-handle-set-external-undisplayer (handle function)
- "Set the undisplayer for this handle; postpone undisplaying of viewers
-for types in mm-keep-viewer-alive-types."
+ "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 function)))
(defun mm-destroy-postponed-undisplay-list ()
- (message "Destroying external MIME viewers")
- (mm-destroy-parts mm-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)
+(defun mm-dissect-buffer (&optional no-strict-mime loose-mime)
"Dissect the current buffer and return a list of MIME handles."
(save-excursion
(let (ct ctl type subtype cte cd description id result from)
(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 (ignore-errors (mail-header-parse-content-type ct))
((equal type "multipart")
(let ((mm-dissect-default-type (if (equal subtype "digest")
"message/rfc822"
- "text/plain")))
+ "text/plain"))
+ (start (cdr (assq 'start (cdr ctl)))))
(add-text-properties 0 (length (car ctl))
(mm-alist-to-plist (cdr ctl)) (car ctl))
;; what really needs to be done here is a way to link a
- ;; MIME handle back to it's parent MIME handle (in a multilevel
+ ;; MIME handle back to it's parent MIME handle (in a multilevel
;; MIME article). That would probably require changing
- ;; the mm-handle API so we simply store the multipart buffert
- ;; name as a text property of the "multipart/whatever" string.
+ ;; the mm-handle API so we simply store the multipart buffert
+ ;; name as a text property of the "multipart/whatever" string.
(add-text-properties 0 (length (car ctl))
- (list 'buffer (mm-copy-to-buffer))
- (car ctl))
- (add-text-properties 0 (length (car ctl))
- (list 'from from)
+ (list 'buffer (mm-copy-to-buffer)
+ 'from from
+ 'start start)
(car ctl))
(cons (car ctl) (mm-dissect-multipart ctl))))
(t
- (mm-dissect-singlepart
- ctl
- (and cte (intern (downcase (mail-header-remove-whitespace
- (mail-header-remove-comments
- cte)))))
- no-strict-mime
- (and cd (ignore-errors (mail-header-parse-content-disposition cd)))
- description id))))
+ (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 (ignore-errors
+ (mail-header-parse-content-disposition cd)))
+ description id)
+ ctl))))
(when id
(when (string-match " *<\\(.*\\)> *" id)
(setq id (match-string 1 id)))
(if (equal "text/plain" (car ctl))
(assoc 'format ctl)
t))
- (let ((res (mm-make-handle
- (mm-copy-to-buffer) ctl cte nil cdl description nil id)))
- (push (car res) mm-dissection-list)
- res)))
-
-(defun mm-remove-all-parts ()
- "Remove all MIME handles."
- (interactive)
- (mapcar 'mm-remove-part mm-dissection-list)
- (setq mm-dissection-list nil))
+ (mm-make-handle
+ (mm-copy-to-buffer) ctl cte nil cdl description nil id)))
(defun mm-dissect-multipart (ctl)
(goto-char (point-min))
(save-restriction
(narrow-to-region start (point))
(setq parts (nconc (list (mm-dissect-buffer t)) parts)))))
- (forward-line 2)
+ (end-of-line 2)
+ (or (looking-at boundary)
+ (forward-line 1))
(setq start (point)))
(when (and start (< start end))
(save-excursion
projects / gnus / blobdiff