;;; mm-decode.el --- Functions for decoding MIME things
-;; Copyright (C) 1998 Free Software Foundation, Inc.
+;; Copyright (C) 1998,99 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
`(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-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
- '(("image/jpeg" mm-inline-image (featurep 'jpeg))
- ("image/png" mm-inline-image (featurep 'png))
- ("image/gif" mm-inline-image (featurep 'gif))
- ("image/tiff" mm-inline-image (featurep 'tiff))
- ("image/xbm" mm-inline-image (eq (device-type) 'x))
- ("image/xpm" mm-inline-image (featurep 'xpm))
- ("image/bmp" mm-inline-image (featurep 'bmp))
+ '(("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 (featurep 'w3))
+ ("text/html" mm-inline-text (locate-library "w3"))
+ ("text/x-vcard" mm-inline-text (locate-library "vcard"))
("message/delivery-status" mm-inline-text t)
+ ("text/.*" mm-inline-text t)
("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))))
+ (device-sound-enabled-p)))
+ ("multipart/alternative" ignore t)
+ ("multipart/mixed" ignore t)
+ ("multipart/related" ignore t))
"Alist of media types/test that say whether the media types can be displayed inline.")
(defvar mm-user-display-methods
("message/delivery-status" . inline)))
(defvar mm-user-automatic-display
- '("text/plain" "text/enriched" "text/richtext" "text/html" "image/gif"
- "message/delivery-status"))
+ '("text/plain" "text/enriched" "text/richtext" "text/html"
+ "text/x-vcard" "image/.*" "message/delivery-status" "multipart/.*"))
+
+(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
+ "List of MIME type regexps that will be displayed externally automatically.")
(defvar mm-alternative-precedence
- '("text/plain" "text/enriched" "text/richtext" "text/html")
+ '("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-tmp-directory "/tmp/"
+(defvar mm-tmp-directory
+ (cond ((fboundp 'temp-directory) (temp-directory))
+ ((boundp 'temporary-file-directory) temporary-file-directory)
+ ("/tmp/"))
"Where mm will store its temporary files.")
+(defvar mm-all-images-fit nil
+ "If non-nil, then all images fit in the buffer.")
+
;;; Internal variables.
(defvar mm-dissection-list nil)
(let (ct ctl type subtype cte cd description id result)
(save-restriction
(mail-narrow-to-head)
- (when (and (or no-strict-mime
- (mail-fetch-field "mime-version"))
- (setq ct (mail-fetch-field "content-type")))
- (setq ctl (condition-case () (mail-header-parse-content-type ct)
- (error nil))
+ (when (or no-strict-mime
+ (mail-fetch-field "mime-version"))
+ (setq ct (mail-fetch-field "content-type")
+ ctl (ignore-errors (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"))))
- (if (not ctl)
- (mm-dissect-singlepart '("text/plain") nil no-strict-mime nil nil)
+ (if (or (not ctl)
+ (not (string-match "/" (car ctl))))
+ (mm-dissect-singlepart
+ '("text/plain") nil no-strict-mime
+ (and cd (ignore-errors (mail-header-parse-content-disposition cd)))
+ description)
(setq type (split-string (car ctl) "/"))
(setq subtype (cadr type)
type (pop type))
result
(cond
((equal type "multipart")
- (mm-dissect-multipart ctl))
+ (cons (car ctl) (mm-dissect-multipart ctl)))
(t
(mm-dissect-singlepart
ctl
(mail-header-remove-comments
cte)))))
no-strict-mime
- (and cd (condition-case ()
- (mail-header-parse-content-disposition cd)
- (error nil)))))))
+ (and cd (ignore-errors (mail-header-parse-content-disposition cd)))
+ description id))))
(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)
+(defun mm-dissect-singlepart (ctl cte &optional force cdl description id)
(when (or force
(not (equal "text/plain" (car ctl))))
- (let ((res (list (list (mm-copy-to-buffer) ctl cte nil cdl description))))
+ (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-dissect-multipart (ctl)
(goto-char (point-min))
(let* ((boundary (concat "\n--" (mail-content-type-get ctl 'boundary)))
- (close-delimiter (concat boundary "--[ \t]*$"))
- start parts
- (end (save-excursion
+ (close-delimiter (concat (regexp-quote boundary) "--[ \t]*$"))
+ start parts
+ (end (save-excursion
(goto-char (point-max))
(if (re-search-backward close-delimiter nil t)
(match-beginning 0)
(save-excursion
(save-restriction
(narrow-to-region start (point))
- (setq parts (nconc (mm-dissect-buffer t) parts)))))
+ (setq parts (nconc (list (mm-dissect-buffer t)) parts)))))
(forward-line 2)
(setq start (point)))
(when start
(save-excursion
(save-restriction
(narrow-to-region start end)
- (setq parts (nconc (mm-dissect-buffer t) parts)))))
+ (setq parts (nconc (list (mm-dissect-buffer t)) parts)))))
(nreverse parts)))
(defun mm-copy-to-buffer ()
(let ((obuf (current-buffer))
beg)
(goto-char (point-min))
- (search-forward "\n\n" nil t)
+ (search-forward-regexp "^\n" nil t)
(setq beg (point))
(set-buffer (generate-new-buffer " *mm*"))
(insert-buffer-substring obuf beg)
(eq (mm-user-method type) 'inline))
(defun mm-display-part (handle &optional no-default)
- "Display the MIME part represented by HANDLE."
+ "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)
(if (eq user-method 'inline)
(progn
(forward-line 1)
- (mm-display-inline handle))
+ (mm-display-inline handle)
+ 'inline)
(when (or user-method
method
(not no-default))
- (mm-display-external
- handle (or user-method method 'mailcap-save-binary-file))))))))
+ (if (and (not user-method)
+ (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))
+ 'external)))))))
(defun mm-display-external (handle method)
"Display HANDLE using METHOD."
(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)))
(if (functionp method)
(let ((cur (current-buffer)))
(if (eq method 'mailcap-save-binary-file)
- (set-buffer (generate-new-buffer "*mm*"))
- (select-window (get-buffer-window cur t))
+ (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 'no-conversion)
+ (mm-set-buffer-file-coding-system mm-binary-coding-system)
(insert-buffer-substring cur)
- (funcall method)
- (mm-handle-set-undisplayer handle (current-buffer)))
+ (message "Viewing with %s" method)
+ (let ((mm (current-buffer))
+ (non-viewer (assoc "non-viewer"
+ (mailcap-mime-info
+ (car (mm-handle-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))
(needsterm (assoc "needsterm"
(mailcap-mime-info
(car (mm-handle-type handle)) t)))
- process file)
+ process file buffer)
;; We create a private sub-directory where we store our files.
(make-directory dir)
(set-file-modes dir 448)
(setq file (expand-file-name (file-name-nondirectory filename)
dir))
(setq file (make-temp-name (expand-file-name "mm." dir))))
- (write-region (point-min) (point-max)
- file nil 'nomesg nil 'no-conversion)
- (setq process
- (if needsterm
- (start-process "*display*" nil
- "xterm"
- "-e" shell-file-name "-c"
- (format method
- (mm-quote-arg file)))
- (start-process "*display*" (generate-new-buffer "*mm*")
- shell-file-name
- "-c" (format method
- (mm-quote-arg file)))))
- (mm-handle-set-undisplayer handle (cons file process))
+ (write-region (point-min) (point-max) file nil 'nomesg)
+ (message "Viewing with %s" method)
+ (unwind-protect
+ (setq process
+ (if needsterm
+ (start-process "*display*" nil
+ "xterm"
+ "-e" shell-file-name "-c"
+ (format method
+ (mm-quote-arg file)))
+ (start-process "*display*"
+ (setq buffer (generate-new-buffer "*mm*"))
+ shell-file-name
+ "-c" (format method
+ (mm-quote-arg file)))))
+ (mm-handle-set-undisplayer handle (cons file buffer)))
(message "Displaying %s..." (format method file))))))
+(defun mm-remove-parts (handles)
+ "Remove the displayed MIME parts represented by HANDLE."
+ (if (and (listp handles)
+ (bufferp (car handles)))
+ (mm-remove-part handles)
+ (let (handle)
+ (while (setq handle (pop handles))
+ (cond
+ ((stringp 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 HANDLE."
+ (if (and (listp handles)
+ (bufferp (car handles)))
+ (mm-destroy-part handles)
+ (let (handle)
+ (while (setq handle (pop handles))
+ (cond
+ ((stringp handle)
+ )
+ ((and (listp handle)
+ (stringp (car handle)))
+ (mm-destroy-parts (cdr handle)))
+ (t
+ (mm-destroy-part handle)))))))
+
(defun mm-remove-part (handle)
"Remove the displayed MIME part represented by HANDLE."
- (let ((object (mm-handle-undisplayer handle)))
- (condition-case ()
+ (when (listp handle)
+ (let ((object (mm-handle-undisplayer handle)))
+ (ignore-errors
(cond
;; Internally displayed part.
((mm-annotationp object)
(funcall object))
;; Externally displayed part.
((consp object)
- (condition-case ()
- (delete-file (car object))
- (error nil))
- (condition-case ()
- (delete-directory (file-name-directory (car object)))
- (error nil))
- (condition-case ()
- (kill-process (cdr object))
- (error nil)))
+ (ignore-errors (delete-file (car object)))
+ (ignore-errors (delete-directory (file-name-directory (car object))))
+ (ignore-errors (kill-buffer (cdr object))))
((bufferp object)
(when (buffer-live-p object)
- (kill-buffer object))))
- (error nil))
- (mm-handle-set-undisplayer handle nil)))
+ (kill-buffer object)))))
+ (mm-handle-set-undisplayer handle nil))))
(defun mm-display-inline (handle)
(let* ((type (car (mm-handle-type handle)))
"Return the user-defined method for TYPE."
(let ((methods mm-user-automatic-display)
method result)
+ (while (setq method (pop methods))
+ (when (and (string-match method type)
+ (mm-inlinable-p type))
+ (setq result t
+ methods nil)))
+ result))
+
+(defun mm-attachment-override-p (type)
+ "Say whether TYPE should have attachment behavior overridden."
+ (let ((types mm-attachment-override-types)
+ ty)
+ (catch 'found
+ (while (setq ty (pop types))
+ (when (and (string-match ty type)
+ (mm-inlinable-p type))
+ (throw 'found t))))))
+
+(defun mm-automatic-external-display-p (type)
+ "Return the user-defined method for TYPE."
+ (let ((methods mm-user-automatic-external-display)
+ method result)
(while (setq method (pop methods))
(when (string-match method type)
(setq result t
(defun mm-destroy-part (handle)
"Destroy the data structures connected to HANDLE."
- (mm-remove-part handle)
- (when (buffer-live-p (mm-handle-buffer handle))
- (kill-buffer (mm-handle-buffer 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))
-
+
(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 "[!`\"$\\& \t{} ]" arg pos))
+ (while (setq new-pos (string-match "[;!`\"$\\& \t{} |()<>]" arg pos))
(push (substring arg pos new-pos) accum)
(push "\\" accum)
(push (list (aref arg new-pos)) accum)
(defun mm-get-part (handle)
"Return the contents of HANDLE as a string."
(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)))
+ (mm-insert-part handle)
(buffer-string)))
+(defun mm-insert-part (handle)
+ "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))))))
+
(defvar mm-default-directory nil)
(defun mm-save-part (handle)
(or mm-default-directory default-directory))))
(setq mm-default-directory (file-name-directory file))
(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)))
+ (mm-insert-part handle)
(when (or (not (file-exists-p file))
(yes-or-no-p (format "File %s already exists; overwrite? "
file)))
- (write-region (point-min) (point-max) 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))))))
(defun mm-pipe-part (handle)
"Pipe HANDLE to a process."
(command
(read-string "Shell command on MIME part: " mm-last-shell-command)))
(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)))
+ (mm-insert-part handle)
(shell-command-on-region (point-min) (point-max) command nil))))
(defun mm-interactively-view-part (handle)
(defun mm-preferred-alternative (handles &optional preferred)
"Say which of HANDLES are preferred."
(let ((prec (if preferred (list preferred) mm-alternative-precedence))
- p h result type)
+ p h result type handle)
(while (setq p (pop prec))
(setq h handles)
(while h
- (setq type (car (mm-handle-type (car h))))
+ (setq type
+ (if (stringp (caar h))
+ (caar h)
+ (car (mm-handle-type (car h)))))
+ (setq handle (car h))
(when (and (equal p type)
(mm-automatic-display-p type)
- (or (not (mm-handle-disposition (car h)))
+ (or (stringp (caar h))
+ (not (mm-handle-disposition (car h)))
(equal (car (mm-handle-disposition (car h)))
"inline")))
(setq result (car h)
"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)) "/")))
+ spec)
+ ;; Allow some common translations.
+ (setq type
+ (cond
+ ((equal type "x-pixmap")
+ "xpm")
+ ((equal type "x-xbitmap")
+ "xbm")
+ (t type)))
+ (or (mm-handle-cache handle)
+ (mm-with-unibyte-buffer
+ (mm-insert-part handle)
+ (prog1
+ (setq spec
+ (make-glyph `[,(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
+ (and (< (glyph-width image) (window-pixel-width))
+ (< (glyph-height image) (window-pixel-height))))))
+
(provide 'mm-decode)
;; mm-decode.el ends here
projects / gnus / blobdiff