`(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)
,disposition ,description ,cache ,id))
(defvar mm-inline-media-tests
- '(("image/jpeg" mm-inline-image
- (and window-system (featurep 'jpeg) (mm-image-fit-p handle)))
- ("image/png" mm-inline-image
- (and window-system (featurep 'png) (mm-image-fit-p handle)))
- ("image/gif" mm-inline-image
- (and window-system (featurep 'gif) (mm-image-fit-p handle)))
- ("image/tiff" mm-inline-image
- (and window-system (featurep 'tiff) (mm-image-fit-p handle)))
- ("image/xbm" mm-inline-image
- (and window-system (fboundp 'device-type)
- (eq (device-type) 'x)))
- ("image/x-xbitmap" mm-inline-image
- (and window-system (fboundp 'device-type)
- (eq (device-type) 'x)))
- ("image/xpm" mm-inline-image
- (and window-system (featurep 'xpm)))
- ("image/x-pixmap" mm-inline-image
- (and window-system (featurep 'xpm)))
- ("image/bmp" mm-inline-image
- (and window-system (featurep 'bmp)))
- ("text/plain" mm-inline-text t)
- ("text/enriched" mm-inline-text t)
- ("text/richtext" mm-inline-text t)
- ("text/html" mm-inline-text (locate-library "w3"))
- ("text/x-vcard" mm-inline-text (locate-library "vcard"))
- ("message/delivery-status" mm-inline-text t)
- ("message/rfc822" mm-inline-message t)
- ("text/.*" mm-inline-text t)
+ '(("image/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-pixmap"
+ 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)))
+ ("text/plain" mm-inline-text identity)
+ ("text/enriched" mm-inline-text identity)
+ ("text/richtext" mm-inline-text identity)
+ ("text/html"
+ mm-inline-text
+ (lambda (handle)
+ (locate-library "w3")))
+ ("text/x-vcard"
+ mm-inline-text
+ (lambda (handle)
+ (locate-library "vcard")))
+ ("message/delivery-status" mm-inline-text identity)
+ ("message/rfc822" mm-inline-message identity)
+ ("text/.*" mm-inline-text identity)
("audio/wav" mm-inline-audio
- (and (or (featurep 'nas-sound) (featurep 'native-sound))
- (device-sound-enabled-p)))
- ("audio/au" mm-inline-audio
- (and (or (featurep 'nas-sound) (featurep 'native-sound))
- (device-sound-enabled-p)))
- ("multipart/alternative" ignore t)
- ("multipart/mixed" ignore t)
- ("multipart/related" ignore t))
+ (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))))
+ ("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.")
-(defvar mm-user-display-methods
- '(("image/.*" . inline)
- ("text/.*" . inline)
- ("message/delivery-status" . inline)
- ("message/rfc822" . inline)))
-
-(defvar mm-user-automatic-display
+(defvar mm-inlined-types
+ '("image/.*" "text/.*" "message/delivery-status" "message/rfc822")
+ "List of media types that are to be displayed inline.")
+
+(defvar mm-automatic-display
'("text/plain" "text/enriched" "text/richtext" "text/html"
"text/x-vcard" "image/.*" "message/delivery-status" "multipart/.*"
- "message/rfc822"))
+ "message/rfc822")
+ "A list of MIME types to be displayed automatically.")
-(defvar mm-attachment-override-types
- '("text/plain" "text/x-vcard")
+(defvar mm-attachment-override-types '("text/plain" "text/x-vcard")
"Types that should have \"attachment\" ignored if they can be displayed inline.")
-(defvar mm-user-automatic-external-display nil
+(defvar mm-automatic-external-display nil
"List of MIME type regexps that will be displayed externally automatically.")
-(defvar mm-alternative-precedence
- '("multipart/related" "multipart/mixed" "multipart/alternative"
- "image/jpeg" "image/gif" "text/html" "text/enriched"
- "text/richtext" "text/plain")
- "List that describes the precedence of alternative parts.")
+(defvar 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
+somewhat unwanted, then the value of this variable should be set
+to:
+
+ (\"text/html\" \"text/richtext\")")
(defvar mm-tmp-directory
(cond ((fboundp 'temp-directory) (temp-directory))
("/tmp/"))
"Where mm will store its temporary files.")
-(defvar mm-all-images-fit nil
+(defvar mm-inline-large-images nil
"If non-nil, then all images fit in the buffer.")
;;; Internal variables.
(insert-buffer-substring obuf beg)
(current-buffer))))
-(defun mm-inlinable-part-p (type)
- "Say whether TYPE can be displayed inline."
- (eq (mm-user-method type) 'inline))
-
(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;
(mailcap-parse-mailcaps)
(if (mm-handle-displayed-p handle)
(mm-remove-part handle)
- (let* ((type (car (mm-handle-type handle)))
- (method (mailcap-mime-info type))
- (user-method (mm-user-method type)))
- (if (eq user-method 'inline)
+ (let* ((type (mm-handle-media-type handle))
+ (method (mailcap-mime-info type)))
+ (if (mm-inlined-p handle)
(progn
(forward-line 1)
(mm-display-inline handle)
'inline)
- (when (or user-method
- method
+ (when (or method
(not no-default))
- (if (and (not user-method)
- (not method)
+ (if (and (not method)
(equal "text" (car (split-string type))))
(progn
(forward-line 1)
(mm-insert-inline handle (mm-get-part handle))
'inline)
(mm-display-external
- handle (or user-method method
- 'mailcap-save-binary-file))
+ handle (or method 'mailcap-save-binary-file))
'external)))))))
(defun mm-display-external (handle method)
(let ((mm (current-buffer))
(non-viewer (assoc "non-viewer"
(mailcap-mime-info
- (car (mm-handle-type handle)) t))))
+ (mm-handle-media-type handle) t))))
(unwind-protect
(if method
(funcall method)
(let* ((dir (make-temp-name (expand-file-name "emm." mm-tmp-directory)))
(filename (mail-content-type-get
(mm-handle-disposition handle) 'filename))
- (needsterm (assoc "needsterm"
- (mailcap-mime-info
- (car (mm-handle-type handle)) t)))
+ (mime-info (mailcap-mime-info
+ (mm-handle-media-type handle) t))
+ (needsterm (or (assoc "needsterm" mime-info)
+ (assoc "needsterminal" mime-info)))
process file buffer)
;; We create a private sub-directory where we store our files.
(make-directory dir)
(start-process "*display*" nil
"xterm"
"-e" shell-file-name "-c"
- (format method
- (mm-quote-arg file)))
+ (mm-mailcap-command
+ method file (mm-handle-type handle)))
(start-process "*display*"
(setq buffer (generate-new-buffer "*mm*"))
shell-file-name
- "-c" (format method
- (mm-quote-arg file)))))
+ "-c"
+ (mm-mailcap-command
+ method file (mm-handle-type handle)))))
(mm-handle-set-undisplayer handle (cons file buffer)))
(message "Displaying %s..." (format method file))))))
+(defun mm-mailcap-command (method file type-list)
+ (let ((ctl (cdr type-list))
+ (beg 0)
+ out sub total)
+ (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 "%s")
+ (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)
+ (mapconcat 'identity (nreverse out) "")))
+
(defun mm-remove-parts (handles)
"Remove the displayed MIME parts represented by HANDLE."
(if (and (listp handles)
(mm-handle-set-undisplayer handle nil))))
(defun mm-display-inline (handle)
- (let* ((type (car (mm-handle-type handle)))
- (function (cadr (assoc type mm-inline-media-tests))))
+ (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-inlinable-p (type)
- "Say whether TYPE can be displayed inline."
+(defun mm-assoc-string-match (alist type)
+ (dolist (elem alist)
+ (when (string-match (car elem) type)
+ (return elem))))
+
+(defun mm-inlinable-p (handle)
+ "Say whether HANDLE can be displayed inline."
(let ((alist mm-inline-media-tests)
+ (type (mm-handle-media-type handle))
test)
(while alist
- (when (equal type (caar alist))
+ (when (string-match (caar alist) type)
(setq test (caddar alist)
alist nil)
- (setq test (eval test)))
+ (setq test (funcall test handle)))
(pop alist))
test))
-(defun mm-user-method (type)
- "Return the user-defined method for TYPE."
- (let ((methods mm-user-display-methods)
+(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 (string-match (car method) type)
- (when (or (not (eq (cdr method) 'inline))
- (mm-inlinable-p type))
- (setq result (cdr method)
- methods nil))))
+ (when (and (string-match method type)
+ (mm-inlinable-p handle))
+ (setq result t
+ methods nil)))
result))
-(defun mm-automatic-display-p (type)
- "Return the user-defined method for TYPE."
- (let ((methods mm-user-automatic-display)
+(defun mm-inlined-p (handle)
+ "Say whether the user wants HANDLE to be displayed automatically."
+ (let ((methods mm-inlined-types)
+ (type (mm-handle-media-type handle))
method result)
(while (setq method (pop methods))
(when (and (string-match method type)
- (mm-inlinable-p type))
+ (mm-inlinable-p handle))
(setq result t
methods nil)))
result))
-(defun mm-attachment-override-p (type)
- "Say whether TYPE should have attachment behavior overridden."
+(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 type))
+ (mm-inlinable-p handle))
(throw 'found t))))))
(defun mm-automatic-external-display-p (type)
"Return the user-defined method for TYPE."
- (let ((methods mm-user-automatic-external-display)
+ (let ((methods mm-automatic-external-display)
method result)
(while (setq method (pop methods))
(when (string-match method type)
methods nil)))
result))
-(defun add-mime-display-method (type method)
- "Make parts of TYPE be displayed with METHOD.
-This overrides entries in the mailcap file."
- (push (cons type method) mm-user-display-methods))
-
(defun mm-destroy-part (handle)
"Destroy the data structures connected to HANDLE."
(when (listp handle)
"Say whether HANDLE is displayed or not."
(mm-handle-undisplayer handle))
-(defun mm-quote-arg (arg)
- "Return a version of ARG that is safe to evaluate in a shell."
- (let ((pos 0) new-pos accum)
- ;; *** bug: we don't handle newline characters properly
- (while (setq new-pos (string-match "[;!`\"$\\& \t{} |()<>]" arg pos))
- (push (substring arg pos new-pos) accum)
- (push "\\" accum)
- (push (list (aref arg new-pos)) accum)
- (setq pos (1+ new-pos)))
- (if (= pos 0)
- arg
- (apply 'concat (nconc (nreverse accum) (list (substring arg pos)))))))
-
;;;
;;; Functions for outputting parts
;;;
"Insert the contents of HANDLE in the current buffer."
(let ((cur (current-buffer)))
(save-excursion
- (mm-with-unibyte-buffer
- (insert-buffer-substring (mm-handle-buffer handle))
- (mm-decode-content-transfer-encoding
- (mm-handle-encoding handle)
- (car (mm-handle-type handle)))
- (let ((temp (current-buffer)))
- (set-buffer cur)
- (insert-buffer-substring temp))))))
+ (if (member (mm-handle-media-supertype handle) '("text" "message"))
+ (with-temp-buffer
+ (insert-buffer-substring (mm-handle-buffer handle))
+ (mm-decode-content-transfer-encoding
+ (mm-handle-encoding handle)
+ (mm-handle-media-type handle))
+ (let ((temp (current-buffer)))
+ (set-buffer cur)
+ (insert-buffer-substring temp)))
+ (mm-with-unibyte-buffer
+ (insert-buffer-substring (mm-handle-buffer handle))
+ (mm-decode-content-transfer-encoding
+ (mm-handle-encoding handle)
+ (mm-handle-media-type handle))
+ (let ((temp (current-buffer)))
+ (set-buffer cur)
+ (insert-buffer-substring temp)))))))
(defvar mm-default-directory nil)
(or filename name "")
(or mm-default-directory default-directory))))
(setq mm-default-directory (file-name-directory file))
- (mm-with-unibyte-buffer
- (mm-insert-part handle)
- (when (or (not (file-exists-p file))
- (yes-or-no-p (format "File %s already exists; overwrite? "
- file)))
- ;; Now every coding system is 100% binary within mm-with-unibyte-buffer
- ;; Is text still special?
- (let ((coding-system-for-write
- (if (equal "text" (car (split-string
- (car (mm-handle-type handle)) "/")))
- buffer-file-coding-system
- 'binary))
- ;; Don't re-compress .gz & al. Arguably we should make
- ;; `file-name-handler-alist' nil, but that would chop
- ;; ange-ftp which it's reasonable to use here.
- (inhibit-file-name-operation 'write-region)
- (inhibit-file-name-handlers
- (if (equal (car (mm-handle-type handle))
- "application/octet-stream")
- (cons 'jka-compr-handler inhibit-file-name-handlers)
- inhibit-file-name-handlers)))
- (write-region (point-min) (point-max) 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))))
+
+(defun mm-save-part-to-file (handle file)
+ (mm-with-unibyte-buffer
+ (mm-insert-part handle)
+ (let ((coding-system-for-write 'binary)
+ ;; Don't re-compress .gz & al. Arguably we should make
+ ;; `file-name-handler-alist' nil, but that would chop
+ ;; ange-ftp, which is reasonable to use here.
+ (inhibit-file-name-operation 'write-region)
+ (inhibit-file-name-handlers
+ (if (equal (mm-handle-media-type handle)
+ "application/octet-stream")
+ (cons 'jka-compr-handler inhibit-file-name-handlers)
+ inhibit-file-name-handlers)))
+ (write-region (point-min) (point-max) file))))
(defun mm-pipe-part (handle)
"Pipe HANDLE to a process."
(defun mm-interactively-view-part (handle)
"Display HANDLE using METHOD."
- (let* ((type (car (mm-handle-type handle)))
+ (let* ((type (mm-handle-media-type handle))
(methods
(mapcar (lambda (i) (list (cdr (assoc 'viewer i))))
(mailcap-mime-info type 'all)))
(defun mm-preferred-alternative (handles &optional preferred)
"Say which of HANDLES are preferred."
- (let ((prec (if preferred (list preferred) mm-alternative-precedence))
+ (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 type
- (if (stringp (caar h))
- (caar h)
- (car (mm-handle-type (car h)))))
(setq handle (car h))
+ (setq type (mm-handle-media-type handle))
(when (and (equal p type)
- (mm-automatic-display-p type)
- (or (stringp (caar h))
- (not (mm-handle-disposition (car h)))
- (equal (car (mm-handle-disposition (car h)))
+ (mm-automatic-display-p handle)
+ (or (stringp (car handle))
+ (not (mm-handle-disposition handle))
+ (equal (car (mm-handle-disposition handle))
"inline")))
- (setq result (car h)
+ (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 (lambda (h)
+ (mm-handle-media-type h))
+ 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)))
(defun mm-get-image (handle)
"Return an image instance based on HANDLE."
- (let ((type (cadr (split-string (car (mm-handle-type handle)) "/")))
+ (let ((type (mm-handle-media-subtype handle))
spec)
;; Allow some common translations.
(setq type
(prog1
(setq spec
(ignore-errors
- (make-glyph
- (cond
- ((equal type "xbm")
- (let ((height 32)
- (width 32))
- (forward-line 2)
- (vector 'xbm :data (list height width
- (buffer-substring
- (point) (point-max))))))
- (t
+ (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-all-images-fit
+ (or mm-inline-large-images
(and (< (glyph-width image) (window-pixel-width))
(< (glyph-height image) (window-pixel-height))))))
+(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)))
+
+(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)
+ (mm-image-fit-p handle)))
+
(provide 'mm-decode)
;; mm-decode.el ends here
projects / elisp / gnus.git- / blobdiff