;;; mm-decode.el --- Functions for decoding MIME things
-;; Copyright (C) 1998,99 Free Software Foundation, Inc.
+;; Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
(require 'mail-parse)
(require 'mailcap)
(require 'mm-bodies)
+(eval-when-compile (require 'cl))
+
+(eval-and-compile
+ (autoload 'mm-inline-partial "mm-partial")
+ (autoload 'mm-inline-external-body "mm-extern"))
+
+(defgroup mime-display ()
+ "Display of MIME in mail and news articles."
+ :link '(custom-manual "(emacs-mime)Customization")
+ :group 'mail
+ :group 'news
+ :group 'multimedia)
+
+(defgroup mime-security ()
+ "MIME security in mail and news articles."
+ :link '(custom-manual "(emacs-mime)Customization")
+ :group 'mail
+ :group 'news
+ :group 'multimedia)
;;; Convenience macros.
`(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-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))
-(defvar mm-inline-media-tests
+(defcustom mm-inline-media-tests
'(("image/jpeg"
mm-inline-image
(lambda (handle)
("text/x-patch" mm-display-patch-inline
(lambda (handle)
(locate-library "diff-mode")))
+ ("application/emacs-lisp" mm-display-elisp-inline identity)
("text/html"
mm-inline-text
(lambda (handle)
("text/x-vcard"
mm-inline-text
(lambda (handle)
- (locate-library "vcard")))
+ (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))))
("application/pgp-signature" ignore identity)
+ ("application/x-pkcs7-signature" ignore identity)
+ ("application/pkcs7-signature" ignore identity)
("multipart/alternative" ignore identity)
("multipart/mixed" ignore identity)
("multipart/related" ignore identity))
- "Alist of media types/test that say whether the media types can be displayed inline.")
+ "Alist of media types/tests saying whether types can be displayed inline."
+ :type '(repeat (list (string :tag "MIME type")
+ (function :tag "Display function")
+ (function :tag "Display test")))
+ :group 'mime-display)
-(defvar mm-inlined-types
+(defcustom mm-inlined-types
'("image/.*" "text/.*" "message/delivery-status" "message/rfc822"
- "application/pgp-signature")
- "List of media types that are to be displayed inline.")
+ "message/partial" "message/external-body" "application/emacs-lisp"
+ "application/pgp-signature" "application/x-pkcs7-signature"
+ "application/pkcs7-signature")
+ "List of media types that are to be displayed inline."
+ :type '(repeat string)
+ :group 'mime-display)
-(defvar mm-automatic-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")
- "A list of MIME types to be displayed automatically.")
+ "message/rfc822" "text/x-patch" "application/pgp-signature"
+ "application/emacs-lisp" "application/x-pkcs7-signature"
+ "application/pkcs7-signature")
+ "A list of MIME types to be displayed automatically."
+ :type '(repeat string)
+ :group 'mime-display)
-(defvar mm-attachment-override-types '("text/x-vcard")
- "Types that should have \"attachment\" ignored if they can be displayed inline.")
+(defcustom mm-attachment-override-types '("text/x-vcard")
+ "Types to have \"attachment\" ignored if they can be displayed inline."
+ :type '(repeat string)
+ :group 'mime-display)
-(defvar mm-inline-override-types nil
- "Types that should be treated as attachments even if they can be displayed inline.")
+(defcustom mm-inline-override-types nil
+ "Types to be treated as attachments even if they can be displayed inline."
+ :type '(repeat string)
+ :group 'mime-display)
-(defvar mm-inline-override-types nil
- "Types that should be treated as attachments even if they can be displayed inline.")
+(defcustom mm-automatic-external-display nil
+ "List of MIME type regexps that will be displayed externally automatically."
+ :type '(repeat string)
+ :group 'mime-display)
-(defvar mm-automatic-external-display nil
- "List of MIME type regexps that will be displayed externally automatically.")
-
-(defvar mm-discouraged-alternatives nil
+(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/richtech are
+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\")")
+ (\"text/html\" \"text/richtext\")"
+ :type '(repeat string)
+ :group 'mime-display)
(defvar mm-tmp-directory
(cond ((fboundp 'temp-directory) (temp-directory))
("/tmp/"))
"Where mm will store its temporary files.")
-(defvar mm-inline-large-images nil
- "If non-nil, then all images fit in the buffer.")
+(defcustom mm-inline-large-images nil
+ "If non-nil, then all images fit in the buffer."
+ :type 'boolean
+ :group 'mime-display)
;;; Internal variables.
(defvar mm-last-shell-command "")
(defvar mm-content-id-alist nil)
+;; According to RFC2046, in particular, in a digest, the default
+;; Content-Type value for a body part is changed from "text/plain" to
+;; "message/rfc822".
+(defvar mm-dissect-default-type "text/plain")
+
+(autoload 'mml2015-verify "mml2015")
+(autoload 'mml2015-verify-test "mml2015")
+(autoload 'mml-smime-verify "mml-smime")
+
+(defvar mm-verify-function-alist
+ '(("application/pgp-signature" mml2015-verify "PGP" mml2015-verify-test)
+ ("application/pkcs7-signature" mml-smime-verify "S/MIME" nil)
+ ("application/x-pkcs7-signature" mml-smime-verify "S/MIME" nil)))
+
+(defcustom mm-verify-option 'known
+ "Option of verifying signed parts.
+`never', not verify; `always', always verify;
+`known', only verify known protocols. Otherwise, ask user."
+ :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)))
+
+(defcustom mm-decrypt-option 'known
+ "Option of decrypting signed parts.
+`never', not decrypt; `always', always decrypt;
+`known', only decrypt known protocols. Otherwise, ask user."
+ :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)
+ map)
+ "Keymap for input viewer with completion.")
+
+;; Should we bind other key to minibuffer-complete-word?
+(define-key mm-viewer-completion-map " " 'self-insert-command)
+
;;; The functions.
+(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-dissect-buffer (&optional no-strict-mime)
"Dissect the current buffer and return a list of MIME handles."
(save-excursion
cd (mail-fetch-field "content-disposition")
description (mail-fetch-field "content-description")
id (mail-fetch-field "content-id"))))
+ (when cte
+ (setq cte (mail-header-strip cte)))
(if (or (not ctl)
(not (string-match "/" (car ctl))))
(mm-dissect-singlepart
- '("text/plain")
+ (list mm-dissect-default-type)
(and cte (intern (downcase (mail-header-remove-whitespace
(mail-header-remove-comments
cte)))))
result
(cond
((equal type "multipart")
- (cons (car ctl) (mm-dissect-multipart ctl)))
+ (let ((mm-dissect-default-type (if (equal subtype "digest")
+ "message/rfc822"
+ "text/plain")))
+ (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 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.
+ (add-text-properties 0 (length (car ctl))
+ (list 'buffer (mm-copy-to-buffer))
+ (car ctl))
+ (cons (car ctl) (mm-dissect-multipart ctl))))
(t
(mm-dissect-singlepart
ctl
(defun mm-dissect-singlepart (ctl cte &optional force cdl description id)
(when (or force
- (not (equal "text/plain" (car ctl))))
+ (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)
(defun mm-dissect-multipart (ctl)
(goto-char (point-min))
(let* ((boundary (concat "\n--" (mail-content-type-get ctl 'boundary)))
- (close-delimiter (concat (regexp-quote boundary) "--[ \t]*$"))
- start parts
- (end (save-excursion
- (goto-char (point-max))
- (if (re-search-backward close-delimiter nil t)
- (match-beginning 0)
- (point-max)))))
- (while (search-forward boundary end t)
+ (close-delimiter (concat (regexp-quote boundary) "--[ \t]*$"))
+ 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 (re-search-forward boundary end t)
(goto-char (match-beginning 0))
(when start
(save-excursion
(save-restriction
(narrow-to-region start end)
(setq parts (nconc (list (mm-dissect-buffer t)) parts)))))
- (nreverse 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."
(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;
(mm-insert-inline handle (mm-get-part handle))
'inline)
(mm-display-external
- handle (or method 'mailcap-save-binary-file))
- 'external)))))))
+ handle (or method 'mailcap-save-binary-file)))))))))
(defun mm-display-external (handle method)
"Display HANDLE using METHOD."
- (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)
+ (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))
+ (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)))))
+ ;; The function is a string to be executed.
+ (mm-insert-part handle)
+ (let* ((dir (make-temp-name (expand-file-name "emm." mm-tmp-directory)))
+ (filename (mail-content-type-get
+ (mm-handle-disposition handle) 'filename))
+ (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)
+ ;; We create a private sub-directory where we store our files.
+ (make-directory dir)
+ (set-file-modes dir 448)
+ (if filename
+ (setq file (expand-file-name (file-name-nondirectory filename)
+ dir))
+ (setq file (make-temp-name (expand-file-name "mm." dir))))
+ (let ((coding-system-for-write mm-binary-coding-system))
+ (write-region (point-min) (point-max) file nil 'nomesg))
(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)))))
- ;; The function is a string to be executed.
- (mm-insert-part handle)
- (let* ((dir (make-temp-name (expand-file-name "emm." mm-tmp-directory)))
- (filename (mail-content-type-get
- (mm-handle-disposition handle) 'filename))
- (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))
- process file buffer)
- ;; We create a private sub-directory where we store our files.
- (make-directory dir)
- (set-file-modes dir 448)
- (if filename
- (setq file (expand-file-name (file-name-nondirectory filename)
- dir))
- (setq file (make-temp-name (expand-file-name "mm." dir))))
- (let ((coding-system-for-write mm-binary-coding-system))
- (write-region (point-min) (point-max) file nil 'nomesg))
- (message "Viewing with %s" method)
- (unwind-protect
- (setq process
- (cond (needsterm
- (start-process "*display*" nil
- "xterm"
- "-e" shell-file-name "-c"
- (mm-mailcap-command
- method file (mm-handle-type handle))))
- (copiousoutput
- (start-process "*display*"
- (setq buffer
- (generate-new-buffer "*mm*"))
- shell-file-name
- "-c"
- (mm-mailcap-command
- method file (mm-handle-type handle)))
- (switch-to-buffer buffer))
- (t
- (start-process "*display*"
+ (cond (needsterm
+ (unwind-protect
+ (start-process "*display*" nil
+ "xterm"
+ "-e" shell-file-name
+ shell-command-switch
+ (mm-mailcap-command
+ method file (mm-handle-type handle)))
+ (mm-handle-set-undisplayer handle (cons file buffer)))
+ (message "Displaying %s..." (format method file))
+ '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*"))
- shell-file-name
- "-c"
+ (generate-new-buffer " *mm*"))
+ nil
+ shell-command-switch
(mm-mailcap-command
- method file (mm-handle-type handle))))))
- (mm-handle-set-undisplayer handle (cons file buffer)))
- (message "Displaying %s..." (format method file))))))
-
+ method file (mm-handle-type handle)))
+ (if (buffer-live-p buffer)
+ (save-excursion
+ (set-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
+ (unwind-protect
+ (start-process "*display*"
+ (setq buffer
+ (generate-new-buffer " *mm*"))
+ shell-file-name
+ shell-command-switch
+ (mm-mailcap-command
+ method file (mm-handle-type handle)))
+ (mm-handle-set-undisplayer handle (cons file buffer)))
+ (message "Displaying %s..." (format method file))
+ '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\\|%t" method beg)
+ (while (string-match "%{\\([^}]+\\)}\\|%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))
((string= total "%s")
+ (setq uses-stdin nil)
(push (mm-quote-arg 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)
+ (if uses-stdin
+ (progn
+ (push "<" out)
+ (push (mm-quote-arg file) out)))
(mapconcat 'identity (nreverse out) "")))
-
+
(defun mm-remove-parts (handles)
- "Remove the displayed MIME parts represented by HANDLE."
+ "Remove the displayed MIME parts represented by HANDLES."
(if (and (listp handles)
(bufferp (car handles)))
(mm-remove-part handles)
(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)))
(mm-remove-part handle)))))))
(defun mm-destroy-parts (handles)
- "Remove the displayed MIME parts represented by HANDLE."
+ "Remove the displayed MIME parts represented by HANDLES."
(if (and (listp handles)
(bufferp (car handles)))
(mm-destroy-part handles)
(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 (cdr handle)))
(save-excursion
(if (member (mm-handle-media-supertype handle) '("text" "message"))
(with-temp-buffer
- (insert-buffer-substring (mm-handle-buffer handle))
+ (insert-buffer-substring (mm-handle-buffer handle))
(mm-decode-content-transfer-encoding
(mm-handle-encoding handle)
(mm-handle-media-type handle))
(or filename name "")
(or mm-default-directory default-directory))))
(setq mm-default-directory (file-name-directory file))
- (when (or (not (file-exists-p file))
- (yes-or-no-p (format "File %s already exists; overwrite? "
- file)))
- (mm-save-part-to-file handle 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
(methods
(mapcar (lambda (i) (list (cdr (assoc 'viewer i))))
(mailcap-mime-info type 'all)))
- (method (completing-read "Viewer: " methods)))
+ (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 (copy-sequence handle) method)))
(defun mm-preferred-alternative (handles &optional preferred)
result))
(defun mm-preferred-alternative-precedence (handles)
- "Return the precedence based on HANDLES and mm-discouraged-alternatives."
- (let ((seq (nreverse (mapcar (lambda (h)
- (mm-handle-media-type h))
+ "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))
(prog1
(setq spec
(ignore-errors
- (cond
- ((equal type "xbm")
- ;; xbm images require special handling, since
- ;; the only way to create glyphs from these
- ;; (without a ton of work) is to write them
- ;; out to a file, and then create a file
- ;; specifier.
- (let ((file (make-temp-name
- (expand-file-name "emm.xbm"
- mm-tmp-directory))))
- (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 (intern type) :data (buffer-string)))))))
+ ;; Avoid testing `make-glyph' since W3 may define
+ ;; a bogus version of it.
+ (if (fboundp 'create-image)
+ (create-image (buffer-string) (intern type) 'data-p)
+ (cond
+ ((equal type "xbm")
+ ;; xbm images require special handling, since
+ ;; the only way to create glyphs from these
+ ;; (without a ton of work) is to write them
+ ;; out to a file, and then create a file
+ ;; specifier.
+ (let ((file (make-temp-name
+ (expand-file-name "emm.xbm"
+ mm-tmp-directory))))
+ (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 (intern type) :data (buffer-string))))))))
(mm-handle-set-cache handle spec))))))
(defun mm-image-fit-p (handle)
"Say whether the image in HANDLE will fit the current window."
(let ((image (mm-get-image handle)))
- (or mm-inline-large-images
- (and (< (glyph-width image) (window-pixel-width))
- (< (glyph-height image) (window-pixel-height))))))
+ (if (fboundp 'glyph-width)
+ ;; XEmacs' glyphs can actually tell us about their width, so
+ ;; lets be nice and smart about them.
+ (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))) ; Don't include mode line.
+ (< w (window-width))))))))
(defun mm-valid-image-format-p (format)
"Say whether FORMAT can be displayed natively by Emacs."
- (and (fboundp 'valid-image-instantiator-format-p)
- (valid-image-instantiator-format-p format)))
+ (cond
+ ;; Handle XEmacs
+ ((fboundp 'valid-image-instantiator-format-p)
+ (valid-image-instantiator-format-p format))
+ ;; Handle Emacs 21
+ ((fboundp 'image-type-available-p)
+ (and (display-graphic-p)
+ (image-type-available-p format)))
+ ;; Nobody else can do images yet.
+ (t
+ nil)))
(defun mm-valid-and-fit-image-p (format handle)
"Say whether FORMAT can be displayed natively and HANDLE fits the window."
- (and window-system
- (mm-valid-image-format-p format)
+ (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 "\n--" (mail-content-type-get 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 (point))
+ (when (let ((ctl (ignore-errors
+ (mail-header-parse-content-type
+ (mail-fetch-field "content-type")))))
+ (if notp
+ (not (equal (car ctl) type))
+ (equal (car ctl) type)))
+ (setq result (buffer-substring (point-min) (point-max)))))))
+ (forward-line 2)
+ (setq start (point)))
+ (when (and (not result) start)
+ (save-excursion
+ (save-restriction
+ (narrow-to-region start end)
+ (when (let ((ctl (ignore-errors
+ (mail-header-parse-content-type
+ (mail-fetch-field "content-type")))))
+ (if notp
+ (not (equal (car ctl) type))
+ (equal (car ctl) type)))
+ (setq result (buffer-substring (point-min) (point-max)))))))
+ result))
+
+(defun mm-possibly-verify-or-decrypt (parts ctl)
+ (let ((subtype (cadr (split-string (car ctl) "/")))
+ protocol func functest)
+ (cond
+ ((equal subtype "signed")
+ (unless (and (setq protocol (mail-content-type-get ctl 'protocol))
+ (not (equal protocol "multipart/mixed")))
+ ;; The message is broken or draft-ietf-openpgp-multsig-01.
+ (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)))
+ (if (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))))))
+ (condition-case err
+ (save-excursion
+ (if func
+ (funcall func parts ctl)
+ (error (format "Unknown sign protocol (%s)" protocol))))
+ (error
+ (unless (y-or-n-p (format "%s, continue? " err))
+ (error "Verify failure."))))))
+ ((equal subtype "encrypted")
+ (unless (setq protocol (mail-content-type-get ctl 'protocol))
+ ;; The message is broken.
+ (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)))
+ (if (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))))))
+ (condition-case err
+ (save-excursion
+ (if func
+ (setq parts (funcall func parts ctl))
+ (error (format "Unknown encrypt protocol (%s)" protocol))))
+ (error
+ (unless (y-or-n-p (format "%s, continue? " err))
+ (error "Decrypt failure."))))))
+ (t nil))
+ parts))
+
(provide 'mm-decode)
-;; mm-decode.el ends here
+;;; mm-decode.el ends here
projects / gnus / blobdiff