;;; rmailmm.el --- MIME decoding and display stuff for RMAIL
-;; Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+;; Copyright (C) 2006-2012 Free Software Foundation, Inc.
;; Author: Alexander Pohoyda
;; Alex Schroeder
;;
;; rmail-mime
;; +- rmail-mime-show <----------------------------------+
-;; +- rmail-mime-process |
+;; +- rmail-mime-process |
;; +- rmail-mime-handle |
;; +- rmail-mime-text-handler |
;; +- rmail-mime-bulk-handler |
The remaining elements are handler functions to run, in order of
decreasing preference. These are called until one returns non-nil.
Note that this only applies to items with an inline Content-Disposition,
-all others are handled by `rmail-mime-bulk-handler'."
+all others are handled by `rmail-mime-bulk-handler'.
+Note also that this alist is ignored when the variable
+`rmail-enable-mime' is non-nil."
:type '(alist :key-type regexp :value-type (repeat function))
:version "23.1"
:group 'rmail-mime)
;;; End of user options.
+;;; Global variables that always have let-binding when referred.
+
+(defvar rmail-mime-mbox-buffer nil
+ "Buffer containing the mbox data.
+The value is usually nil, and bound to a proper value while
+processing MIME.")
+
+(defvar rmail-mime-view-buffer nil
+ "Buffer showing a message.
+The value is usually nil, and bound to a proper value while
+processing MIME.")
+
+(defvar rmail-mime-coding-system nil
+ "The first coding-system used for decoding a MIME entity.
+The value is usually nil, and bound to non-nil while inserting
+MIME entities.")
+
;;; MIME-entity object
(defun rmail-mime-entity (type disposition transfer-encoding
- header body children)
- "Retrun a newly created MIME-entity object.
+ display header tagline body children handler
+ &optional truncated)
+ "Return a newly created MIME-entity object from arguments.
-A MIME-entity is a vector of 6 elements:
+A MIME-entity is a vector of 10 elements:
- [ TYPE DISPOSITION TRANSFER-ENCODING HEADER BODY CHILDREN ]
-
-TYPE and DISPOSITION correspond to MIME headers Content-Type: and
-Cotent-Disposition: respectively, and has this format:
+ [TYPE DISPOSITION TRANSFER-ENCODING DISPLAY HEADER TAGLINE BODY
+ CHILDREN HANDLER TRUNCATED]
+
+TYPE and DISPOSITION correspond to MIME headers Content-Type and
+Content-Disposition respectively, and have this format:
\(VALUE (ATTRIBUTE . VALUE) (ATTRIBUTE . VALUE) ...)
-VALUE is a string and ATTRIBUTE is a symbol.
+Each VALUE is a string and each ATTRIBUTE is a string.
Consider the following header, for example:
\(\"boundary\" . \"----=_NextPart_000_0104_01C617E4.BDEC4C40\"))
TRANSFER-ENCODING corresponds to MIME header
-Content-Transfer-Encoding, and is a lowercased string.
-
-HEADER and BODY are a cons (BEG . END), where BEG and END specify
-the region of the corresponding part in RMAIL's data (mbox)
-buffer. BODY may be nil. In that case, the current buffer is
-narrowed to the body part.
-
-CHILDREN is a list of MIME-entities for a \"multipart\" entity, and
-nil for the other types."
- (vector type disposition transfer-encoding header body children))
+Content-Transfer-Encoding, and is a lower-case string.
+
+DISPLAY is a vector [CURRENT NEW], where CURRENT indicates how
+the header, tag line, and body of the entity are displayed now,
+and NEW indicates how their display should be updated.
+Both elements are vectors [HEADER-DISPLAY TAGLINE-DISPLAY BODY-DISPLAY],
+where each constituent element is a symbol for the corresponding
+item with these values:
+ nil: not displayed
+ t: displayed by the decoded presentation form
+ raw: displayed by the raw MIME data (for the header and body only)
+
+HEADER and BODY are vectors [BEG END DISPLAY-FLAG], where BEG and
+END are markers that specify the region of the header or body lines
+in RMAIL's data (mbox) buffer, and DISPLAY-FLAG non-nil means that the
+header or body is, by default, displayed by the decoded
+presentation form.
+
+TAGLINE is a vector [TAG BULK-DATA DISPLAY-FLAG], where TAG is a
+string indicating the depth and index number of the entity,
+BULK-DATA is a cons (SIZE . TYPE) indicating the size and type of
+an attached data, DISPLAY-FLAG non-nil means that the tag line is
+displayed by default.
+
+CHILDREN is a list of child MIME-entities. A \"multipart/*\"
+entity has one or more children. A \"message/rfc822\" entity
+has just one child. Any other entity has no child.
+
+HANDLER is a function to insert the entity according to DISPLAY.
+It is called with one argument ENTITY.
+
+TRUNCATED is non-nil if the text of this entity was truncated."
+
+ (vector type disposition transfer-encoding
+ display header tagline body children handler truncated))
;; Accessors for a MIME-entity object.
(defsubst rmail-mime-entity-type (entity) (aref entity 0))
(defsubst rmail-mime-entity-disposition (entity) (aref entity 1))
(defsubst rmail-mime-entity-transfer-encoding (entity) (aref entity 2))
-(defsubst rmail-mime-entity-header (entity) (aref entity 3))
-(defsubst rmail-mime-entity-body (entity) (aref entity 4))
-(defsubst rmail-mime-entity-children (entity) (aref entity 5))
+(defsubst rmail-mime-entity-display (entity) (aref entity 3))
+(defsubst rmail-mime-entity-header (entity) (aref entity 4))
+(defsubst rmail-mime-entity-tagline (entity) (aref entity 5))
+(defsubst rmail-mime-entity-body (entity) (aref entity 6))
+(defsubst rmail-mime-entity-children (entity) (aref entity 7))
+(defsubst rmail-mime-entity-handler (entity) (aref entity 8))
+(defsubst rmail-mime-entity-truncated (entity) (aref entity 9))
+(defsubst rmail-mime-entity-set-truncated (entity truncated)
+ (aset entity 9 truncated))
+
+(defsubst rmail-mime-message-p ()
+ "Non-nil if and only if the current message is a MIME."
+ (or (get-text-property (point) 'rmail-mime-entity)
+ (get-text-property (point-min) 'rmail-mime-entity)))
;;; Buttons
(defun rmail-mime-save (button)
"Save the attachment using info in the BUTTON."
- (let* ((filename (button-get button 'filename))
+ (let* ((rmail-mime-mbox-buffer rmail-view-buffer)
+ (filename (button-get button 'filename))
(directory (button-get button 'directory))
(data (button-get button 'data))
- (mbox-buf rmail-view-buffer)
(ofilename filename))
+ (if (and (not (stringp data))
+ (rmail-mime-entity-truncated data))
+ (unless (y-or-n-p "This entity is truncated; save anyway? ")
+ (error "Aborted")))
(setq filename (expand-file-name
(read-file-name (format "Save as (default: %s): " filename)
directory
;; DATA is a MIME-entity object.
(let ((transfer-encoding (rmail-mime-entity-transfer-encoding data))
(body (rmail-mime-entity-body data)))
- (insert-buffer-substring mbox-buf (car body) (cdr body))
+ (insert-buffer-substring rmail-mime-mbox-buffer
+ (aref body 0) (aref body 1))
(cond ((string= transfer-encoding "base64")
(ignore-errors (base64-decode-region (point-min) (point-max))))
((string= transfer-encoding "quoted-printable")
(define-button-type 'rmail-mime-save 'action 'rmail-mime-save)
+;; Display options returned by rmail-mime-entity-display.
+;; Value is on of nil, t, raw.
+(defsubst rmail-mime-display-header (disp) (aref disp 0))
+(defsubst rmail-mime-display-tagline (disp) (aref disp 1))
+(defsubst rmail-mime-display-body (disp) (aref disp 2))
+
+(defun rmail-mime-entity-segment (pos &optional entity)
+ "Return a vector describing the displayed region of a MIME-entity at POS.
+Optional 2nd argument ENTITY is the MIME-entity at POS.
+The value is a vector [INDEX HEADER TAGLINE BODY END], where
+ INDEX: index into the returned vector indicating where POS is (1..3)
+ HEADER: the position of the beginning of a header
+ TAGLINE: the position of the beginning of a tag line, including
+ the newline that precedes it
+ BODY: the position of the beginning of a body
+ END: the position of the end of the entity."
+ (save-excursion
+ (or entity
+ (setq entity (get-text-property pos 'rmail-mime-entity)))
+ (if (not entity)
+ (vector 1 (point) (point) (point) (point))
+ (let ((current (aref (rmail-mime-entity-display entity) 0))
+ (beg (if (and (> pos (point-min))
+ (eq (get-text-property (1- pos) 'rmail-mime-entity)
+ entity))
+ (previous-single-property-change pos 'rmail-mime-entity
+ nil (point-min))
+ pos))
+ (index 1)
+ tagline-beg body-beg end)
+ (goto-char beg)
+ ;; If the header is displayed, get past it to the tagline.
+ (if (rmail-mime-display-header current)
+ (search-forward "\n\n" nil t))
+ (setq tagline-beg (point))
+ (if (>= pos tagline-beg)
+ (setq index 2))
+ ;; If the tagline is displayed, get past it to the body.
+ (if (rmail-mime-display-tagline current)
+ ;; The next forward-line call must be in sync with how
+ ;; `rmail-mime-insert-tagline' formats the tagline. The
+ ;; body begins after the empty line that ends the tagline.
+ (forward-line 3))
+ (setq body-beg (point))
+ (if (>= pos body-beg)
+ (setq index 3))
+ ;; If the body is displayed, find its end.
+ (if (rmail-mime-display-body current)
+ (let ((tag (aref (rmail-mime-entity-tagline entity) 0))
+ tag2)
+ (setq end (next-single-property-change beg 'rmail-mime-entity
+ nil (point-max)))
+ ;; `tag' is either an empty string or "/n" where n is
+ ;; the number of the part of the multipart MIME message.
+ ;; The loop below finds the next location whose
+ ;; `rmail-mime-entity' property specifies a tag of a
+ ;; different value.
+ (while (and (< end (point-max))
+ (setq entity (get-text-property end 'rmail-mime-entity)
+ tag2 (aref (rmail-mime-entity-tagline entity) 0))
+ (and (> (length tag2) 0)
+ (eq (string-match tag tag2) 0)))
+ (setq end (next-single-property-change end 'rmail-mime-entity
+ nil (point-max)))))
+ (setq end body-beg))
+ (vector index beg tagline-beg body-beg end)))))
+
+(defun rmail-mime-shown-mode (entity)
+ "Make MIME-entity ENTITY display in the default way."
+ (let ((new (aref (rmail-mime-entity-display entity) 1)))
+ (aset new 0 (aref (rmail-mime-entity-header entity) 2))
+ (aset new 1 (aref (rmail-mime-entity-tagline entity) 2))
+ (aset new 2 (aref (rmail-mime-entity-body entity) 2)))
+ (dolist (child (rmail-mime-entity-children entity))
+ (rmail-mime-shown-mode child)))
+
+(defun rmail-mime-hidden-mode (entity)
+ "Make MIME-entity ENTITY display in hidden mode."
+ (let ((new (aref (rmail-mime-entity-display entity) 1)))
+ (aset new 0 nil)
+ (aset new 1 t)
+ (aset new 2 nil))
+ (dolist (child (rmail-mime-entity-children entity))
+ (rmail-mime-hidden-mode child)))
+
+(defun rmail-mime-raw-mode (entity)
+ "Make MIME-entity ENTITY display in raw mode."
+ (let ((new (aref (rmail-mime-entity-display entity) 1)))
+ (aset new 0 'raw)
+ (aset new 1 nil)
+ (aset new 2 'raw))
+ (dolist (child (rmail-mime-entity-children entity))
+ (rmail-mime-raw-mode child)))
+
+(defun rmail-mime-toggle-raw (&optional state)
+ "Toggle on and off the raw display mode of MIME-entity at point.
+With optional argument STATE, force the specified display mode.
+Use `raw' for raw mode, and any other non-nil value for decoded mode."
+ (let* ((pos (if (eobp) (1- (point-max)) (point)))
+ (entity (get-text-property pos 'rmail-mime-entity))
+ (current (aref (rmail-mime-entity-display entity) 0))
+ (segment (rmail-mime-entity-segment pos entity)))
+ (if (or (eq state 'raw)
+ (and (not state)
+ (not (eq (rmail-mime-display-header current) 'raw))))
+ ;; Enter the raw mode.
+ (rmail-mime-raw-mode entity)
+ ;; Enter the shown mode.
+ (rmail-mime-shown-mode entity))
+ (let ((inhibit-read-only t)
+ (modified (buffer-modified-p)))
+ (save-excursion
+ (goto-char (aref segment 1))
+ (rmail-mime-insert entity)
+ (restore-buffer-modified-p modified)))))
+
+(defun rmail-mime-toggle-hidden ()
+ "Hide or show the body of the MIME-entity at point."
+ (interactive)
+ (when (rmail-mime-message-p)
+ (let* ((rmail-mime-mbox-buffer rmail-view-buffer)
+ (rmail-mime-view-buffer (current-buffer))
+ (pos (if (eobp) (1- (point-max)) (point)))
+ (entity (get-text-property pos 'rmail-mime-entity))
+ (current (aref (rmail-mime-entity-display entity) 0))
+ (segment (rmail-mime-entity-segment pos entity)))
+ (if (rmail-mime-display-body current)
+ ;; Enter the hidden mode.
+ (progn
+ ;; If point is in the body part, move it to the tagline
+ ;; (or the header if tagline is not displayed).
+ (if (= (aref segment 0) 3)
+ (goto-char (aref segment 2)))
+ (rmail-mime-hidden-mode entity)
+ ;; If the current entity is the topmost one, display the
+ ;; header.
+ (if (and rmail-mime-mbox-buffer (= (aref segment 1) (point-min)))
+ (let ((new (aref (rmail-mime-entity-display entity) 1)))
+ (aset new 0 t))))
+ ;; Query as a warning before showing if truncated.
+ (if (and (not (stringp entity))
+ (rmail-mime-entity-truncated entity))
+ (unless (y-or-n-p "This entity is truncated; show anyway? ")
+ (error "Aborted")))
+ ;; Enter the shown mode.
+ (rmail-mime-shown-mode entity)
+ ;; Force this body shown.
+ (aset (aref (rmail-mime-entity-display entity) 1) 2 t))
+ (let ((inhibit-read-only t)
+ (modified (buffer-modified-p))
+ (rmail-mime-mbox-buffer rmail-view-buffer)
+ (rmail-mime-view-buffer rmail-buffer))
+ (save-excursion
+ (goto-char (aref segment 1))
+ (rmail-mime-insert entity)
+ (restore-buffer-modified-p modified))))))
+
+(define-key rmail-mode-map "\t" 'forward-button)
+(define-key rmail-mode-map [backtab] 'backward-button)
+(define-key rmail-mode-map "\r" 'rmail-mime-toggle-hidden)
+
;;; Handlers
+(defun rmail-mime-insert-tagline (entity &rest item-list)
+ "Insert a tag line for MIME-entity ENTITY.
+ITEM-LIST is a list of strings or button-elements (list) to add
+to the tag line."
+ ;; Precede the tagline by an empty line to make it a separate
+ ;; paragraph, so that it is aligned to the left margin of the window
+ ;; even if preceded by a right-to-left paragraph.
+ (insert "\n[")
+ (let ((tag (aref (rmail-mime-entity-tagline entity) 0)))
+ (if (> (length tag) 0) (insert (substring tag 1) ":")))
+ (insert (car (rmail-mime-entity-type entity)) " ")
+ (insert-button (let ((new (aref (rmail-mime-entity-display entity) 1)))
+ (if (rmail-mime-display-body new) "Hide" "Show"))
+ :type 'rmail-mime-toggle
+ 'help-echo "mouse-2, RET: Toggle show/hide")
+ (dolist (item item-list)
+ (when item
+ (if (stringp item)
+ (insert item)
+ (apply 'insert-button item))))
+ ;; Follow the tagline by an empty line to make it a separate
+ ;; paragraph, so that the paragraph direction of the following text
+ ;; is determined based on that text.
+ (insert "]\n\n"))
+
+(defun rmail-mime-update-tagline (entity)
+ "Update the current tag line for MIME-entity ENTITY."
+ (let ((inhibit-read-only t)
+ (modified (buffer-modified-p))
+ ;; If we are going to show the body, the new button label is
+ ;; "Hide". Otherwise, it's "Show".
+ (label (if (aref (aref (rmail-mime-entity-display entity) 1) 2) "Hide"
+ "Show"))
+ (button (next-button (point))))
+ ;; Go to the second character of the button "Show" or "Hide".
+ (goto-char (1+ (button-start button)))
+ (setq button (button-at (point)))
+ (save-excursion
+ (insert label)
+ (delete-region (point) (button-end button)))
+ (delete-region (button-start button) (point))
+ (put-text-property (point) (button-end button) 'rmail-mime-entity entity)
+ (restore-buffer-modified-p modified)
+ ;; The following call to forward-line must be in sync with how
+ ;; rmail-mime-insert-tagline formats the tagline.
+ (forward-line 2)))
+
+(defun rmail-mime-insert-header (header)
+ "Decode and insert a MIME-entity header HEADER in the current buffer.
+HEADER is a vector [BEG END DEFAULT-STATUS].
+See `rmail-mime-entity' for details."
+ (let ((pos (point))
+ (last-coding-system-used nil))
+ (save-restriction
+ (narrow-to-region pos pos)
+ (with-current-buffer rmail-mime-mbox-buffer
+ (let ((rmail-buffer rmail-mime-mbox-buffer)
+ (rmail-view-buffer rmail-mime-view-buffer))
+ (save-excursion
+ (goto-char (aref header 0))
+ (rmail-copy-headers (point) (aref header 1)))))
+ (rfc2047-decode-region pos (point))
+ (if (and last-coding-system-used (not rmail-mime-coding-system))
+ (setq rmail-mime-coding-system (cons last-coding-system-used nil)))
+ (goto-char (point-min))
+ (rmail-highlight-headers)
+ (goto-char (point-max))
+ (insert "\n"))))
+
+(defun rmail-mime-find-header-encoding (header)
+ "Return the last coding system used to decode HEADER.
+HEADER is a header component of a MIME-entity object (see
+`rmail-mime-entity')."
+ (with-temp-buffer
+ (let ((buf (current-buffer)))
+ (with-current-buffer rmail-mime-mbox-buffer
+ (let ((last-coding-system-used nil)
+ (rmail-buffer rmail-mime-mbox-buffer)
+ (rmail-view-buffer buf))
+ (save-excursion
+ (goto-char (aref header 0))
+ (rmail-copy-headers (point) (aref header 1)))))
+ (rfc2047-decode-region (point-min) (point-max))
+ last-coding-system-used)))
+
(defun rmail-mime-text-handler (content-type
content-disposition
content-transfer-encoding)
"Handle the current buffer as a plain text MIME part."
- (let* ((charset (cdr (assq 'charset (cdr content-type))))
- (coding-system (when charset
- (intern (downcase charset)))))
- (when (coding-system-p coding-system)
- (decode-coding-region (point-min) (point-max) coding-system))))
-
-(defun rmail-mime-insert-text (entity)
- "Insert MIME-entity ENTITY as a plain text MIME part in the current buffer."
+ (rmail-mime-insert-text
+ (rmail-mime-entity content-type content-disposition
+ content-transfer-encoding
+ (vector (vector nil nil nil) (vector nil nil t))
+ (vector nil nil nil) (vector "" (cons nil nil) t)
+ (vector nil nil nil) nil 'rmail-mime-insert-text))
+ t)
+
+(defun rmail-mime-insert-decoded-text (entity)
+ "Decode and insert the text body of MIME-entity ENTITY."
(let* ((content-type (rmail-mime-entity-type entity))
(charset (cdr (assq 'charset (cdr content-type))))
- (coding-system (if charset (intern (downcase charset))))
- (transfer-encoding (rmail-mime-entity-transfer-encoding entity))
- (body (rmail-mime-entity-body entity)))
- (save-restriction
- (narrow-to-region (point) (point))
- (insert-buffer-substring rmail-buffer (car body) (cdr body))
- (cond ((string= transfer-encoding "base64")
- (ignore-errors (base64-decode-region (point-min) (point-max))))
- ((string= transfer-encoding "quoted-printable")
- (quoted-printable-decode-region (point-min) (point-max))))
- (if (coding-system-p coding-system)
- (decode-coding-region (point-min) (point-max) coding-system)))))
-
-;; FIXME move to the test/ directory?
-(defun test-rmail-mime-handler ()
- "Test of a mail using no MIME parts at all."
- (let ((mail "To: alex@gnu.org
-Content-Type: text/plain; charset=koi8-r
-Content-Transfer-Encoding: 8bit
-MIME-Version: 1.0
-
-\372\304\322\301\327\323\324\327\325\312\324\305\41"))
- (switch-to-buffer (get-buffer-create "*test*"))
- (erase-buffer)
- (set-buffer-multibyte nil)
- (insert mail)
- (rmail-mime-show t)
- (set-buffer-multibyte t)))
-
-
-(defun rmail-mime-insert-image (type data)
- "Insert an image of type TYPE, where DATA is the image data.
-If DATA is not a string, it is a MIME-entity object."
- (end-of-line)
- (let ((modified (buffer-modified-p)))
- (insert ?\n)
- (unless (stringp data)
- ;; DATA is a MIME-entity.
- (let ((transfer-encoding (rmail-mime-entity-transfer-encoding data))
- (body (rmail-mime-entity-body data))
- (mbox-buffer rmail-view-buffer))
+ (coding-system (if charset
+ (coding-system-from-name charset)))
+ (body (rmail-mime-entity-body entity))
+ (pos (point)))
+ (or (and coding-system (coding-system-p coding-system))
+ (setq coding-system 'undecided))
+ (if (stringp (aref body 0))
+ (insert (aref body 0))
+ (let ((transfer-encoding (rmail-mime-entity-transfer-encoding entity)))
+ (insert-buffer-substring rmail-mime-mbox-buffer
+ (aref body 0) (aref body 1))
+ (cond ((string= transfer-encoding "base64")
+ (ignore-errors (base64-decode-region pos (point))))
+ ((string= transfer-encoding "quoted-printable")
+ (quoted-printable-decode-region pos (point))))))
+ (decode-coding-region pos (point) coding-system)
+ (if (and
+ (or (not rmail-mime-coding-system) (consp rmail-mime-coding-system))
+ (not (eq (coding-system-base coding-system) 'us-ascii)))
+ (setq rmail-mime-coding-system coding-system))
+ (or (bolp) (insert "\n"))))
+
+(defun rmail-mime-insert-text (entity)
+ "Presentation handler for a plain text MIME entity."
+ (let ((current (aref (rmail-mime-entity-display entity) 0))
+ (new (aref (rmail-mime-entity-display entity) 1))
+ (header (rmail-mime-entity-header entity))
+ (tagline (rmail-mime-entity-tagline entity))
+ (body (rmail-mime-entity-body entity))
+ (beg (point))
+ (segment (rmail-mime-entity-segment (point) entity)))
+
+ (or (integerp (aref body 0)) (markerp (aref body 0))
+ (let ((data (buffer-string)))
+ (aset body 0 data)
+ (delete-region (point-min) (point-max))))
+
+ ;; header
+ (if (eq (rmail-mime-display-header current)
+ (rmail-mime-display-header new))
+ (goto-char (aref segment 2))
+ (if (rmail-mime-display-header current)
+ (delete-char (- (aref segment 2) (aref segment 1))))
+ (if (rmail-mime-display-header new)
+ (rmail-mime-insert-header header)))
+ ;; tagline
+ (if (eq (rmail-mime-display-tagline current)
+ (rmail-mime-display-tagline new))
+ (if (or (not (rmail-mime-display-tagline current))
+ (eq (rmail-mime-display-body current)
+ (rmail-mime-display-body new)))
+ (forward-char (- (aref segment 3) (aref segment 2)))
+ (rmail-mime-update-tagline entity))
+ (if (rmail-mime-display-tagline current)
+ (delete-char (- (aref segment 3) (aref segment 2))))
+ (if (rmail-mime-display-tagline new)
+ (rmail-mime-insert-tagline entity)))
+ ;; body
+ (if (eq (rmail-mime-display-body current)
+ (rmail-mime-display-body new))
+ (forward-char (- (aref segment 4) (aref segment 3)))
+ (if (rmail-mime-display-body current)
+ (delete-char (- (aref segment 4) (aref segment 3))))
+ (if (rmail-mime-display-body new)
+ (rmail-mime-insert-decoded-text entity)))
+ (put-text-property beg (point) 'rmail-mime-entity entity)))
+
+(defun rmail-mime-insert-image (entity)
+ "Decode and insert the image body of MIME-entity ENTITY."
+ (let* ((content-type (car (rmail-mime-entity-type entity)))
+ (bulk-data (aref (rmail-mime-entity-tagline entity) 1))
+ (body (rmail-mime-entity-body entity))
+ data)
+ (if (stringp (aref body 0))
+ (setq data (aref body 0))
+ (let ((rmail-mime-mbox-buffer rmail-view-buffer)
+ (transfer-encoding (rmail-mime-entity-transfer-encoding entity)))
(with-temp-buffer
(set-buffer-multibyte nil)
(setq buffer-undo-list t)
- (insert-buffer-substring mbox-buffer (car body) (cdr body))
+ (insert-buffer-substring rmail-mime-mbox-buffer
+ (aref body 0) (aref body 1))
(cond ((string= transfer-encoding "base64")
(ignore-errors (base64-decode-region (point-min) (point-max))))
((string= transfer-encoding "quoted-printable")
(quoted-printable-decode-region (point-min) (point-max))))
(setq data
(buffer-substring-no-properties (point-min) (point-max))))))
- (insert-image (create-image data type t))
- (set-buffer-modified-p modified)))
+ (insert-image (create-image data (cdr bulk-data) t))
+ (insert "\n")))
-(defun rmail-mime-image (button)
- "Display the image associated with BUTTON."
- (let ((inhibit-read-only t))
- (rmail-mime-insert-image (button-get button 'image-type)
- (button-get button 'image-data))))
+(defun rmail-mime-toggle-button (button)
+ "Hide or show the body of the MIME-entity associated with BUTTON."
+ (save-excursion
+ (goto-char (button-start button))
+ (rmail-mime-toggle-hidden)))
-(define-button-type 'rmail-mime-image 'action 'rmail-mime-image)
+(define-button-type 'rmail-mime-toggle 'action 'rmail-mime-toggle-button)
(defun rmail-mime-bulk-handler (content-type
depends upon the value of `rmail-mime-show-images'."
(rmail-mime-insert-bulk
(rmail-mime-entity content-type content-disposition content-transfer-encoding
- nil nil nil)))
+ (vector (vector nil nil nil) (vector nil t nil))
+ (vector nil nil nil) (vector "" (cons nil nil) t)
+ (vector nil nil nil) nil 'rmail-mime-insert-bulk)))
+
+(defun rmail-mime-set-bulk-data (entity)
+ "Setup the information about the attachment object for MIME-entity ENTITY.
+The value is non-nil if and only if the attachment object should be shown
+directly."
+ (let ((content-type (car (rmail-mime-entity-type entity)))
+ (size (cdr (assq 'size (cdr (rmail-mime-entity-disposition entity)))))
+ (bulk-data (aref (rmail-mime-entity-tagline entity) 1))
+ (body (rmail-mime-entity-body entity))
+ type to-show)
+ (cond (size
+ (setq size (string-to-number size)))
+ ((stringp (aref body 0))
+ (setq size (length (aref body 0))))
+ (t
+ ;; Rough estimation of the size.
+ (let ((encoding (rmail-mime-entity-transfer-encoding entity)))
+ (setq size (- (aref body 1) (aref body 0)))
+ (cond ((string= encoding "base64")
+ (setq size (/ (* size 3) 4)))
+ ((string= encoding "quoted-printable")
+ (setq size (/ (* size 7) 3)))))))
+
+ (cond
+ ((string-match "text/" content-type)
+ (setq type 'text))
+ ((string-match "image/\\(.*\\)" content-type)
+ (setq type (image-type-from-file-name
+ (concat "." (match-string 1 content-type))))
+ (if (and (memq type image-types)
+ (image-type-available-p type))
+ (if (and rmail-mime-show-images
+ (not (eq rmail-mime-show-images 'button))
+ (or (not (numberp rmail-mime-show-images))
+ (< size rmail-mime-show-images)))
+ (setq to-show t))
+ (setq type nil))))
+ (setcar bulk-data size)
+ (setcdr bulk-data type)
+ to-show))
(defun rmail-mime-insert-bulk (entity)
- "Inesrt a MIME-entity ENTITY as an attachment.
-The optional second arg DATA, if non-nil, is a string containing
-the attachment data that is already decoded."
- ;; Find the default directory for this media type.
+ "Presentation handler for an attachment MIME entity."
(let* ((content-type (rmail-mime-entity-type entity))
(content-disposition (rmail-mime-entity-disposition entity))
+ (current (aref (rmail-mime-entity-display entity) 0))
+ (new (aref (rmail-mime-entity-display entity) 1))
+ (header (rmail-mime-entity-header entity))
+ (tagline (rmail-mime-entity-tagline entity))
+ (bulk-data (aref tagline 1))
(body (rmail-mime-entity-body entity))
+ ;; Find the default directory for this media type.
(directory (catch 'directory
(dolist (entry rmail-mime-attachment-dirs-alist)
(when (string-match (car entry) (car content-type))
(filename (or (cdr (assq 'name (cdr content-type)))
(cdr (assq 'filename (cdr content-disposition)))
"noname"))
- (label (format "\nAttached %s file: " (car content-type)))
(units '(B kB MB GB))
- data udata size osize type)
- (if body
+ (segment (rmail-mime-entity-segment (point) entity))
+ beg data size)
+
+ (if (or (integerp (aref body 0)) (markerp (aref body 0)))
(setq data entity
- udata entity
- size (- (cdr body) (car body)))
- (setq data (buffer-string)
- udata (string-as-unibyte data)
- size (length udata))
- (delete-region (point-min) (point-max)))
- (setq osize size)
+ size (car bulk-data))
+ (if (stringp (aref body 0))
+ (setq data (aref body 0))
+ (setq data (string-as-unibyte (buffer-string)))
+ (aset body 0 data)
+ (rmail-mime-set-bulk-data entity)
+ (delete-region (point-min) (point-max)))
+ (setq size (length data)))
(while (and (> size 1024.0) ; cribbed from gnus-agent-expire-done-message
(cdr units))
(setq size (/ size 1024.0)
units (cdr units)))
- (insert label)
- (insert-button filename
- :type 'rmail-mime-save
- 'help-echo "mouse-2, RET: Save attachment"
- 'filename filename
- 'directory (file-name-as-directory directory)
- 'data data)
- (insert (format " (%.0f%s)" size (car units)))
- (when (and rmail-mime-show-images
- (string-match "image/\\(.*\\)" (setq type (car content-type)))
- (setq type (concat "." (match-string 1 type))
- type (image-type-from-file-name type))
- (memq type image-types)
- (image-type-available-p type))
- (insert " ")
- (cond ((or (eq rmail-mime-show-images 'button)
- (and (numberp rmail-mime-show-images)
- (>= osize rmail-mime-show-images)))
- (insert-button "Display"
- :type 'rmail-mime-image
- 'help-echo "mouse-2, RET: Show image"
- 'image-type type
- 'image-data udata))
- (t
- (rmail-mime-insert-image type udata))))))
-
-(defun test-rmail-mime-bulk-handler ()
- "Test of a mail used as an example in RFC 2183."
- (let ((mail "Content-Type: image/jpeg
-Content-Disposition: attachment; filename=genome.jpeg;
- modification-date=\"Wed, 12 Feb 1997 16:29:51 -0500\";
-Content-Description: a complete map of the human genome
-Content-Transfer-Encoding: base64
-
-iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAMAAABg3Am1AAAABGdBTUEAALGPC/xhBQAAAAZQ
-TFRF////AAAAVcLTfgAAAPZJREFUeNq9ldsOwzAIQ+3//+l1WlvA5ZLsoUiTto4TB+ISoAjy
-+ITfRBfcAmgRFFeAm+J6uhdKdFhFWUgDkFsK0oUp/9G2//Kj7Jx+5tSKOdBscgUYiKHRS/me
-WATQdRUvAK0Bnmshmtn79PpaLBbbOZkjKvRnjRZoRswOkG1wFchKew2g9wXVJVZL/m4+B+vv
-9AxQQR2Q33SgAYJzzVACdAWjAfRYzYFO9n6SLnydtQHSMxYDMAKqZ/8FS/lTK+zuq3CtK64L
-UDwbgUEAUmk2Zyg101d6PhCDySgAvTvDgKiuOrc4dLxUb7UMnhGIexyI+d6U+ABuNAP4Simx
-lgAAAABJRU5ErkJggg==
-"))
- (switch-to-buffer (get-buffer-create "*test*"))
- (erase-buffer)
- (insert mail)
- (rmail-mime-show)))
+
+ (setq beg (point))
+
+ ;; header
+ (if (eq (rmail-mime-display-header current)
+ (rmail-mime-display-header new))
+ (goto-char (aref segment 2))
+ (if (rmail-mime-display-header current)
+ (delete-char (- (aref segment 2) (aref segment 1))))
+ (if (rmail-mime-display-header new)
+ (rmail-mime-insert-header header)))
+
+ ;; tagline
+ (if (eq (rmail-mime-display-tagline current)
+ (rmail-mime-display-tagline new))
+ (if (or (not (rmail-mime-display-tagline current))
+ (eq (rmail-mime-display-body current)
+ (rmail-mime-display-body new)))
+ (forward-char (- (aref segment 3) (aref segment 2)))
+ (rmail-mime-update-tagline entity))
+ (if (rmail-mime-display-tagline current)
+ (delete-char (- (aref segment 3) (aref segment 2))))
+ (if (rmail-mime-display-tagline new)
+ (rmail-mime-insert-tagline
+ entity
+ " Save:"
+ (list filename
+ :type 'rmail-mime-save
+ 'help-echo "mouse-2, RET: Save attachment"
+ 'filename filename
+ 'directory (file-name-as-directory directory)
+ 'data data)
+ (format " (%.0f%s)" size (car units))
+ ;; We don't need this button because the "type" string of a
+ ;; tagline is the button to do this.
+ ;; (if (cdr bulk-data)
+ ;; " ")
+ ;; (if (cdr bulk-data)
+ ;; (list "Toggle show/hide"
+ ;; :type 'rmail-mime-image
+ ;; 'help-echo "mouse-2, RET: Toggle show/hide"
+ ;; 'image-type (cdr bulk-data)
+ ;; 'image-data data))
+ )))
+ ;; body
+ (if (eq (rmail-mime-display-body current)
+ (rmail-mime-display-body new))
+ (forward-char (- (aref segment 4) (aref segment 3)))
+ (if (rmail-mime-display-body current)
+ (delete-char (- (aref segment 4) (aref segment 3))))
+ (if (rmail-mime-display-body new)
+ (cond ((eq (cdr bulk-data) 'text)
+ (rmail-mime-insert-decoded-text entity))
+ ((cdr bulk-data)
+ (rmail-mime-insert-image entity))
+ (t
+ ;; As we don't know how to display the body, just
+ ;; insert it as a text.
+ (rmail-mime-insert-decoded-text entity)))))
+ (put-text-property beg (point) 'rmail-mime-entity entity)))
(defun rmail-mime-multipart-handler (content-type
content-disposition
of the respective parsed headers. See `rmail-mime-handle' for their
format."
(rmail-mime-process-multipart
- content-type content-disposition content-transfer-encoding nil))
+ content-type content-disposition content-transfer-encoding nil)
+ t)
(defun rmail-mime-process-multipart (content-type
content-disposition
content-transfer-encoding
- parse-only)
+ parse-tag)
"Process the current buffer as a multipart MIME body.
-If PARSE-ONLY is nil, modify the current buffer directly for showing
-the MIME body and return nil.
+If PARSE-TAG is nil, modify the current buffer directly for
+showing the MIME body and return nil.
-Otherwise, just parse the current buffer and return a list of
-MIME-entity objects.
+Otherwise, PARSE-TAG is a string indicating the depth and index
+number of the entity. In this case, parse the current buffer and
+return a list of MIME-entity objects.
The other arguments are the same as `rmail-mime-multipart-handler'."
;; Some MUAs start boundaries with "--", while it should start
;; of the preceding part.
;; We currently don't handle that.
(let ((boundary (cdr (assq 'boundary content-type)))
- beg end next entities)
+ (subtype (cadr (split-string (car content-type) "/")))
+ (index 0)
+ beg end next entities truncated)
(unless boundary
(rmail-mm-get-boundary-error-message
"No boundary defined" content-type content-disposition
(goto-char (point-min))
(when (and (search-forward boundary nil t)
(looking-at "[ \t]*\n"))
- (if parse-only
+ (if parse-tag
(narrow-to-region (match-end 0) (point-max))
(delete-region (point-min) (match-end 0))))
+
+ ;; Change content-type to the proper default one for the children.
+ (cond ((string-match "mixed" subtype)
+ (setq content-type '("text/plain")))
+ ((string-match "digest" subtype)
+ (setq content-type '("message/rfc822")))
+ (t
+ (setq content-type nil)))
+
;; Loop over all body parts, where beg points at the beginning of
;; the part and end points at the end of the part. next points at
- ;; the beginning of the next part.
+ ;; the beginning of the next part. The current point is just
+ ;; after the boundary tag.
(setq beg (point-min))
- (while (search-forward boundary nil t)
- (setq end (match-beginning 0))
+
+ (while (or (and (search-forward boundary nil t)
+ (setq truncated nil end (match-beginning 0)))
+ ;; If the boundary does not appear at all,
+ ;; the message was truncated.
+ ;; Handle the rest of the truncated message
+ ;; (if it isn't empty) by pretending that the boundary
+ ;; appears at the end of the message.
+ (and (save-excursion
+ (skip-chars-forward "\n")
+ (> (point-max) (point)))
+ (setq truncated t end (point-max))))
;; If this is the last boundary according to RFC 2046, hide the
;; epilogue, else hide the boundary only. Use a marker for
;; `next' because `rmail-mime-show' may change the buffer.
(setq next (point-max-marker)))
((looking-at "[ \t]*\n")
(setq next (copy-marker (match-end 0) t)))
+ (truncated
+ ;; We're handling what's left of a truncated message.
+ (setq next (point-max-marker)))
(t
- (rmail-mm-get-boundary-error-message
- "Malformed boundary" content-type content-disposition
- content-transfer-encoding)))
- ;; Handle the part.
- (if parse-only
+ ;; The original code signaled an error as below, but
+ ;; this line may be a boundary of nested multipart. So,
+ ;; we just set `next' to nil to skip this line
+ ;; (rmail-mm-get-boundary-error-message
+ ;; "Malformed boundary" content-type content-disposition
+ ;; content-transfer-encoding)
+ (setq next nil)))
+
+ (when next
+ (setq index (1+ index))
+ ;; Handle the part.
+ (if parse-tag
+ (save-restriction
+ (narrow-to-region beg end)
+ (let ((child (rmail-mime-process
+ nil (format "%s/%d" parse-tag index)
+ content-type content-disposition)))
+ ;; Display a tagline.
+ (aset (aref (rmail-mime-entity-display child) 1) 1
+ (aset (rmail-mime-entity-tagline child) 2 t))
+ (rmail-mime-entity-set-truncated child truncated)
+ (push child entities)))
+
+ (delete-region end next)
(save-restriction
(narrow-to-region beg end)
- (setq entities (cons (rmail-mime-process nil t) entities)))
- (delete-region end next)
- (save-restriction
- (narrow-to-region beg end)
- (rmail-mime-show)))
- (goto-char (setq beg next)))
- (nreverse entities)))
-
-(defun test-rmail-mime-multipart-handler ()
- "Test of a mail used as an example in RFC 2046."
- (let ((mail "From: Nathaniel Borenstein <nsb@bellcore.com>
-To: Ned Freed <ned@innosoft.com>
-Date: Sun, 21 Mar 1993 23:56:48 -0800 (PST)
-Subject: Sample message
-MIME-Version: 1.0
-Content-type: multipart/mixed; boundary=\"simple boundary\"
-
-This is the preamble. It is to be ignored, though it
-is a handy place for composition agents to include an
-explanatory note to non-MIME conformant readers.
-
---simple boundary
-
-This is implicitly typed plain US-ASCII text.
-It does NOT end with a linebreak.
---simple boundary
-Content-type: text/plain; charset=us-ascii
-
-This is explicitly typed plain US-ASCII text.
-It DOES end with a linebreak.
-
---simple boundary--
-
-This is the epilogue. It is also to be ignored."))
- (switch-to-buffer (get-buffer-create "*test*"))
- (erase-buffer)
- (insert mail)
- (rmail-mime-show t)))
+ (rmail-mime-show)))
+ (goto-char (setq beg next))))
+
+ (when parse-tag
+ (setq entities (nreverse entities))
+ (if (string-match "alternative" subtype)
+ ;; Find the best entity to show, and hide all the others.
+ (let (best second)
+ (dolist (child entities)
+ (if (string= (or (car (rmail-mime-entity-disposition child))
+ (car content-disposition))
+ "inline")
+ (if (string-match "text/plain"
+ (car (rmail-mime-entity-type child)))
+ (setq best child)
+ (if (string-match "text/.*"
+ (car (rmail-mime-entity-type child)))
+ (setq second child)))))
+ (or best (not second) (setq best second))
+ (dolist (child entities)
+ (unless (eq best child)
+ (aset (rmail-mime-entity-body child) 2 nil)
+ (rmail-mime-hidden-mode child)))))
+ entities)))
+
+(defun rmail-mime-insert-multipart (entity)
+ "Presentation handler for a multipart MIME entity."
+ (let ((current (aref (rmail-mime-entity-display entity) 0))
+ (new (aref (rmail-mime-entity-display entity) 1))
+ (header (rmail-mime-entity-header entity))
+ (tagline (rmail-mime-entity-tagline entity))
+ (body (rmail-mime-entity-body entity))
+ (beg (point))
+ (segment (rmail-mime-entity-segment (point) entity)))
+ ;; header
+ (if (eq (rmail-mime-display-header current)
+ (rmail-mime-display-header new))
+ (goto-char (aref segment 2))
+ (if (rmail-mime-display-header current)
+ (delete-char (- (aref segment 2) (aref segment 1))))
+ (if (rmail-mime-display-header new)
+ (rmail-mime-insert-header header)))
+ ;; tagline
+ (if (eq (rmail-mime-display-tagline current)
+ (rmail-mime-display-tagline new))
+ (if (or (not (rmail-mime-display-tagline current))
+ (eq (rmail-mime-display-body current)
+ (rmail-mime-display-body new)))
+ (forward-char (- (aref segment 3) (aref segment 2)))
+ (rmail-mime-update-tagline entity))
+ (if (rmail-mime-display-tagline current)
+ (delete-char (- (aref segment 3) (aref segment 2))))
+ (if (rmail-mime-display-tagline new)
+ (rmail-mime-insert-tagline entity)))
+
+ (put-text-property beg (point) 'rmail-mime-entity entity)
+
+ ;; body
+ (if (eq (rmail-mime-display-body current)
+ (rmail-mime-display-body new))
+ (forward-char (- (aref segment 4) (aref segment 3)))
+ (dolist (child (rmail-mime-entity-children entity))
+ (rmail-mime-insert child)))
+ entity))
;;; Main code
CONTENT-TYPE, CONTENT-DISPOSITION, and CONTENT-TRANSFER-ENCODING
are the values of the respective parsed headers. The latter should
-be downcased. The parsed headers for CONTENT-TYPE and CONTENT-DISPOSITION
+be lower-case. The parsed headers for CONTENT-TYPE and CONTENT-DISPOSITION
have the form
\(VALUE . ALIST)
;; Everything else is an attachment.
(rmail-mime-bulk-handler content-type
content-disposition
- content-transfer-encoding)))
+ content-transfer-encoding))
+ (save-restriction
+ (widen)
+ (let ((entity (get-text-property (1- (point)) 'rmail-mime-entity))
+ current new)
+ (when entity
+ (setq current (aref (rmail-mime-entity-display entity) 0)
+ new (aref (rmail-mime-entity-display entity) 1))
+ (dotimes (i 3)
+ (aset current i (aref new i)))))))
(defun rmail-mime-show (&optional show-headers)
"Handle the current buffer as a MIME message.
modified."
(rmail-mime-process show-headers nil))
-(defun rmail-mime-process (show-headers parse-only)
+(defun rmail-mime-process (show-headers parse-tag &optional
+ default-content-type
+ default-content-disposition)
(let ((end (point-min))
content-type
content-transfer-encoding
(setq content-transfer-encoding (downcase content-transfer-encoding)))
(setq content-type
(if content-type
- (mail-header-parse-content-type content-type)
- ;; FIXME: Default "message/rfc822" in a "multipart/digest"
- ;; according to RFC 2046.
- '("text/plain")))
+ (or (mail-header-parse-content-type content-type)
+ '("text/plain"))
+ (or default-content-type '("text/plain"))))
(setq content-disposition
(if content-disposition
(mail-header-parse-content-disposition content-disposition)
;; If none specified, we are free to choose what we deem
;; suitable according to RFC 2183. We like inline.
- '("inline")))
+ (or default-content-disposition '("inline"))))
;; Unrecognized disposition types are to be treated like
;; attachment according to RFC 2183.
(unless (member (car content-disposition) '("inline" "attachment"))
(setq content-disposition '("attachment")))
- (if parse-only
- (cond ((string-match "multipart/.*" (car content-type))
- (setq end (1- end))
- (save-restriction
- (let ((header (if show-headers (cons (point-min) end))))
+ (if parse-tag
+ (let* ((is-inline (string= (car content-disposition) "inline"))
+ (hdr-end (copy-marker end))
+ (header (vector (point-min-marker) hdr-end nil))
+ (tagline (vector parse-tag (cons nil nil) t))
+ (body (vector hdr-end (point-max-marker) is-inline))
+ (new (vector (aref header 2) (aref tagline 2) (aref body 2)))
+ children handler entity)
+ (cond ((string-match "multipart/.*" (car content-type))
+ (save-restriction
+ (narrow-to-region (1- end) (point-max))
+ (setq children (rmail-mime-process-multipart
+ content-type
+ content-disposition
+ content-transfer-encoding
+ parse-tag)
+ handler 'rmail-mime-insert-multipart)))
+ ((string-match "message/rfc822" (car content-type))
+ (save-restriction
(narrow-to-region end (point-max))
- (rmail-mime-entity content-type
- content-disposition
- content-transfer-encoding
- header nil
- (rmail-mime-process-multipart
- content-type content-disposition
- content-transfer-encoding t)))))
- ((string-match "message/rfc822" (car content-type))
- (or show-headers
- (narrow-to-region end (point-max)))
- (rmail-mime-process t t))
- (t
- (rmail-mime-entity content-type
- content-disposition
- content-transfer-encoding
- nil
- (cons end (point-max))
- nil)))
+ (let* ((msg (rmail-mime-process t parse-tag
+ '("text/plain") '("inline")))
+ (msg-new (aref (rmail-mime-entity-display msg) 1)))
+ ;; Show header of the child.
+ (aset msg-new 0 t)
+ (aset (rmail-mime-entity-header msg) 2 t)
+ ;; Hide tagline of the child.
+ (aset msg-new 1 nil)
+ (aset (rmail-mime-entity-tagline msg) 2 nil)
+ (setq children (list msg)
+ handler 'rmail-mime-insert-multipart))))
+ ((and is-inline (string-match "text/" (car content-type)))
+ ;; Don't need a tagline.
+ (aset new 1 (aset tagline 2 nil))
+ (setq handler 'rmail-mime-insert-text))
+ (t
+ ;; Force hidden mode.
+ (aset new 1 (aset tagline 2 t))
+ (aset new 2 (aset body 2 nil))
+ (setq handler 'rmail-mime-insert-bulk)))
+ (setq entity (rmail-mime-entity content-type
+ content-disposition
+ content-transfer-encoding
+ (vector (vector nil nil nil) new)
+ header tagline body children handler))
+ (if (and (eq handler 'rmail-mime-insert-bulk)
+ (rmail-mime-set-bulk-data entity))
+ ;; Show the body.
+ (aset new 2 (aset body 2 t)))
+ entity)
+
;; Hide headers and handle the part.
+ (put-text-property (point-min) (point-max) 'rmail-mime-entity
+ (rmail-mime-entity
+ content-type content-disposition
+ content-transfer-encoding
+ (vector (vector 'raw nil 'raw) (vector 'raw nil 'raw))
+ (vector nil nil 'raw) (vector "" (cons nil nil) nil)
+ (vector nil nil 'raw) nil nil))
(save-restriction
(cond ((string= (car content-type) "message/rfc822")
(narrow-to-region end (point-max)))
(rmail-mime-handle content-type content-disposition
content-transfer-encoding)))))
-(defun rmail-mime-insert-multipart (entity)
- "Insert MIME-entity ENTITY of multipart type in the current buffer."
- (let ((subtype (cadr (split-string (car (rmail-mime-entity-type entity))
- "/")))
- (disposition (rmail-mime-entity-disposition entity))
- (header (rmail-mime-entity-header entity))
- (children (rmail-mime-entity-children entity)))
- (if header
- (let ((pos (point)))
- (or (bolp)
- (insert "\n"))
- (insert-buffer-substring rmail-buffer (car header) (cdr header))
- (rfc2047-decode-region pos (point))
- (insert "\n")))
- (cond
- ((string= subtype "mixed")
- (dolist (child children)
- (rmail-mime-insert child '("text/plain") disposition)))
- ((string= subtype "digest")
- (dolist (child children)
- (rmail-mime-insert child '("message/rfc822") disposition)))
- ((string= subtype "alternative")
- (let (best-plain-text best-text)
- (dolist (child children)
- (if (string= (or (car (rmail-mime-entity-disposition child))
- (car disposition))
- "inline")
- (if (string-match "text/plain"
- (car (rmail-mime-entity-type child)))
- (setq best-plain-text child)
- (if (string-match "text/.*"
- (car (rmail-mime-entity-type child)))
- (setq best-text child)))))
- (if (or best-plain-text best-text)
- (rmail-mime-insert (or best-plain-text best-text))
- ;; No child could be handled. Insert all.
- (dolist (child children)
- (rmail-mime-insert child nil disposition)))))
- (t
- ;; Unsupported subtype. Insert all of them.
- (dolist (child children)
- (rmail-mime-insert child))))))
-
(defun rmail-mime-parse ()
"Parse the current Rmail message as a MIME message.
-The value is a MIME-entiy object (see `rmail-mime-enty-new')."
- (save-excursion
- (goto-char (point-min))
- (condition-case nil
- (rmail-mime-process nil t)
- (error nil))))
-
-(defun rmail-mime-insert (entity &optional content-type disposition)
+The value is a MIME-entity object (see `rmail-mime-entity').
+If an error occurs, return an error message string."
+ (let ((rmail-mime-mbox-buffer (if (rmail-buffers-swapped-p)
+ rmail-view-buffer
+ (current-buffer))))
+ (condition-case err
+ (with-current-buffer rmail-mime-mbox-buffer
+ (save-excursion
+ (goto-char (point-min))
+ (let* ((entity (rmail-mime-process t ""
+ '("text/plain") '("inline")))
+ (new (aref (rmail-mime-entity-display entity) 1)))
+ ;; Show header.
+ (aset new 0 (aset (rmail-mime-entity-header entity) 2 t))
+ ;; Show tagline if and only if body is not shown.
+ (if (aref new 2)
+ (aset new 1 (aset (rmail-mime-entity-tagline entity) 2 nil))
+ (aset new 1 (aset (rmail-mime-entity-tagline entity) 2 t)))
+ entity)))
+ (error (format "%s" err)))))
+
+(defun rmail-mime-insert (entity)
"Insert a MIME-entity ENTITY in the current buffer.
This function will be called recursively if multiple parts are
available."
- (if (rmail-mime-entity-children entity)
- (rmail-mime-insert-multipart entity)
- (setq content-type
- (or (rmail-mime-entity-type entity) content-type))
- (setq disposition
- (or (rmail-mime-entity-disposition entity) disposition))
- (if (and (string= (car disposition) "inline")
- (string-match "text/.*" (car content-type)))
- (rmail-mime-insert-text entity)
- (rmail-mime-insert-bulk entity))))
+ (let ((current (aref (rmail-mime-entity-display entity) 0))
+ (new (aref (rmail-mime-entity-display entity) 1)))
+ (if (not (eq (rmail-mime-display-header new) 'raw))
+ ;; Not a raw-mode. Each handler should handle it.
+ (funcall (rmail-mime-entity-handler entity) entity)
+ (let ((header (rmail-mime-entity-header entity))
+ (tagline (rmail-mime-entity-tagline entity))
+ (body (rmail-mime-entity-body entity))
+ (beg (point))
+ (segment (rmail-mime-entity-segment (point) entity)))
+ ;; header
+ (if (eq (rmail-mime-display-header current)
+ (rmail-mime-display-header new))
+ (goto-char (aref segment 2))
+ (if (rmail-mime-display-header current)
+ (delete-char (- (aref segment 2) (aref segment 1))))
+ (insert-buffer-substring rmail-mime-mbox-buffer
+ (aref header 0) (aref header 1)))
+ ;; tagline
+ (if (rmail-mime-display-tagline current)
+ (delete-char (- (aref segment 3) (aref segment 2))))
+ ;; body
+ (let ((children (rmail-mime-entity-children entity)))
+ (if children
+ (progn
+ (put-text-property beg (point) 'rmail-mime-entity entity)
+ (dolist (child children)
+ (rmail-mime-insert child)))
+ (if (eq (rmail-mime-display-body current)
+ (rmail-mime-display-body new))
+ (forward-char (- (aref segment 4) (aref segment 3)))
+ (if (rmail-mime-display-body current)
+ (delete-char (- (aref segment 4) (aref segment 3))))
+ (insert-buffer-substring rmail-mime-mbox-buffer
+ (aref body 0) (aref body 1))
+ (or (bolp) (insert "\n")))
+ (put-text-property beg (point) 'rmail-mime-entity entity)))))
+ (dotimes (i 3)
+ (aset current i (aref new i)))))
(define-derived-mode rmail-mime-mode fundamental-mode "RMIME"
"Major mode used in `rmail-mime' buffers."
(setq font-lock-defaults '(rmail-font-lock-keywords t t nil nil)))
;;;###autoload
-(defun rmail-mime ()
- "Process the current Rmail message as a MIME message.
-This creates a temporary \"*RMAIL*\" buffer holding a decoded
-copy of the message. Inline content-types are handled according to
-`rmail-mime-media-type-handlers-alist'. By default, this
-displays text and multipart messages, and offers to download
-attachments as specfied by `rmail-mime-attachment-dirs-alist'."
- (interactive)
- (let ((data (rmail-apply-in-message rmail-current-message 'buffer-string))
- (buf (get-buffer-create "*RMAIL*")))
- (set-buffer buf)
- (setq buffer-undo-list t)
- (let ((inhibit-read-only t))
- ;; Decoding the message in fundamental mode for speed, only
- ;; switching to rmail-mime-mode at the end for display. Eg
- ;; quoted-printable-decode-region gets very slow otherwise (Bug#4993).
- (fundamental-mode)
- (erase-buffer)
- (insert data)
- (rmail-mime-show t)
- (rmail-mime-mode)
- (set-buffer-modified-p nil))
- (view-buffer buf)))
+(defun rmail-mime (&optional arg state)
+ "Toggle the display of a MIME message.
+
+The actual behavior depends on the value of `rmail-enable-mime'.
+
+If `rmail-enable-mime' is non-nil (the default), this command toggles
+the display of a MIME message between decoded presentation form and
+raw data. With optional prefix argument ARG, it toggles the display only
+of the MIME entity at point, if there is one. The optional argument
+STATE forces a particular display state, rather than toggling.
+`raw' forces raw mode, any other non-nil value forces decoded mode.
+
+If `rmail-enable-mime' is nil, this creates a temporary \"*RMAIL*\"
+buffer holding a decoded copy of the message. Inline content-types are
+handled according to `rmail-mime-media-type-handlers-alist'.
+By default, this displays text and multipart messages, and offers to
+download attachments as specified by `rmail-mime-attachment-dirs-alist'.
+The arguments ARG and STATE have no effect in this case."
+ (interactive (list current-prefix-arg nil))
+ (if rmail-enable-mime
+ (with-current-buffer rmail-buffer
+ (if (rmail-mime-message-p)
+ (let ((rmail-mime-mbox-buffer rmail-view-buffer)
+ (rmail-mime-view-buffer rmail-buffer)
+ (entity (get-text-property
+ (progn
+ (or arg (goto-char (point-min)))
+ (point)) 'rmail-mime-entity)))
+ (if (or (not arg) entity) (rmail-mime-toggle-raw state)))
+ (message "Not a MIME message, just toggling headers")
+ (rmail-toggle-header)))
+ (let* ((data (rmail-apply-in-message rmail-current-message 'buffer-string))
+ (buf (get-buffer-create "*RMAIL*"))
+ (rmail-mime-mbox-buffer rmail-view-buffer)
+ (rmail-mime-view-buffer buf))
+ (set-buffer buf)
+ (setq buffer-undo-list t)
+ (let ((inhibit-read-only t))
+ ;; Decoding the message in fundamental mode for speed, only
+ ;; switching to rmail-mime-mode at the end for display. Eg
+ ;; quoted-printable-decode-region gets very slow otherwise (Bug#4993).
+ (fundamental-mode)
+ (erase-buffer)
+ (insert data)
+ (rmail-mime-show t)
+ (rmail-mime-mode)
+ (set-buffer-modified-p nil))
+ (view-buffer buf))))
(defun rmail-mm-get-boundary-error-message (message type disposition encoding)
- "Return MESSAGE with more information on the main mime components."
+ "Return MESSAGE with more information on the main MIME components."
(error "%s; type: %s; disposition: %s; encoding: %s"
message type disposition encoding))
(defun rmail-show-mime ()
- "Function to set in `rmail-show-mime-function' (which see)."
- (let ((mbox-buf rmail-buffer)
- (entity (rmail-mime-parse)))
- (if entity
- (with-current-buffer rmail-view-buffer
- (let ((inhibit-read-only t)
- (rmail-buffer mbox-buf))
- (erase-buffer)
- (rmail-mime-insert entity)))
- ;; Decoding failed. Insert the original message body as is.
- (let ((region (with-current-buffer mbox-buf
+ "Function to use for the value of `rmail-show-mime-function'."
+ (let ((entity (rmail-mime-parse))
+ (rmail-mime-mbox-buffer rmail-buffer)
+ (rmail-mime-view-buffer rmail-view-buffer)
+ (rmail-mime-coding-system nil))
+ (if (vectorp entity)
+ (with-current-buffer rmail-mime-view-buffer
+ (erase-buffer)
+ (rmail-mime-insert entity)
+ (if (consp rmail-mime-coding-system)
+ ;; Decoding is done by rfc2047-decode-region only for a
+ ;; header. But, as the used coding system may have been
+ ;; overridden by mm-charset-override-alist, we can't
+ ;; trust (car rmail-mime-coding-system). So, here we
+ ;; try the decoding again with mm-charset-override-alist
+ ;; bound to nil.
+ (let ((mm-charset-override-alist nil))
+ (setq rmail-mime-coding-system
+ (rmail-mime-find-header-encoding
+ (rmail-mime-entity-header entity)))))
+ (set-buffer-file-coding-system
+ (if rmail-mime-coding-system
+ (coding-system-base rmail-mime-coding-system)
+ 'undecided)
+ t t))
+ ;; Decoding failed. ENTITY is an error message. Insert the
+ ;; original message body as is, and show warning.
+ (let ((region (with-current-buffer rmail-mime-mbox-buffer
(goto-char (point-min))
(re-search-forward "^$" nil t)
(forward-line 1)
- (cons (point) (point-max)))))
- (with-current-buffer rmail-view-buffer
+ (vector (point-min) (point) (point-max)))))
+ (with-current-buffer rmail-mime-view-buffer
(let ((inhibit-read-only t))
(erase-buffer)
- (insert-buffer-substring mbox-buf (car region) (cdr region))))
- (message "MIME decoding failed")))))
+ (rmail-mime-insert-header region)
+ (insert-buffer-substring rmail-mime-mbox-buffer
+ (aref region 1) (aref region 2))))
+ (set-buffer-file-coding-system 'no-conversion t t)
+ (message "MIME decoding failed: %s" entity)))))
(setq rmail-show-mime-function 'rmail-show-mime)
(defun rmail-insert-mime-forwarded-message (forward-buffer)
- "Function to set in `rmail-insert-mime-forwarded-message-function' (which see)."
- (let ((mbox-buf (with-current-buffer forward-buffer rmail-view-buffer)))
+ "Insert the message in FORWARD-BUFFER as a forwarded message.
+This is the usual value of `rmail-insert-mime-forwarded-message-function'."
+ (let ((message-buffer
+ (with-current-buffer forward-buffer
+ (if rmail-buffer-swapped
+ forward-buffer
+ rmail-view-buffer))))
(save-restriction
(narrow-to-region (point) (point))
- (message-forward-make-body-mime mbox-buf))))
+ (message-forward-make-body-mime message-buffer))))
(setq rmail-insert-mime-forwarded-message-function
'rmail-insert-mime-forwarded-message)
"Function to set in `rmail-search-mime-message-function' (which see)."
(save-restriction
(narrow-to-region (rmail-msgbeg msg) (rmail-msgend msg))
- (let ((mbox-buf (current-buffer))
- (header-end (save-excursion
- (re-search-forward "^$" nil 'move) (point)))
- (body-end (point-max))
- (entity (rmail-mime-parse)))
- (or
+ (let* ((rmail-mime-mbox-buffer (current-buffer))
+ (rmail-mime-view-buffer rmail-view-buffer)
+ (header-end (save-excursion
+ (re-search-forward "^$" nil 'move) (point)))
+ (body-end (point-max))
+ (entity (rmail-mime-parse)))
+ (or
;; At first, just search the headers.
(with-temp-buffer
- (insert-buffer-substring mbox-buf nil header-end)
+ (insert-buffer-substring rmail-mime-mbox-buffer nil header-end)
(rfc2047-decode-region (point-min) (point))
(goto-char (point-min))
(re-search-forward regexp nil t))
;; Next, search the body.
(if (and entity
+ ;; RMS: I am not sure why, but sometimes this is a string.
+ (not (stringp entity))
(let* ((content-type (rmail-mime-entity-type entity))
(charset (cdr (assq 'charset (cdr content-type)))))
- (or (not (string-match "text/.*" (car content-type)))
+ (or (not (string-match "text/.*" (car content-type)))
(and charset
(not (string= (downcase charset) "us-ascii"))))))
;; Search the decoded MIME message.
(with-temp-buffer
- (let ((rmail-buffer mbox-buf))
- (rmail-mime-insert entity))
+ (rmail-mime-insert entity)
(goto-char (point-min))
(re-search-forward regexp nil t))
;; Search the body without decoding.
;; generated-autoload-file: "rmail.el"
;; End:
-;; arch-tag: 3f2c5e5d-1aef-4512-bc20-fd737c9d5dd9
;;; rmailmm.el ends here
HCoop / bpt / emacs.git / blobdiff