+(defvar notmuch-show-multipart/alternative-discouraged
+ '(
+ ;; Avoid HTML parts.
+ "text/html"
+ ;; multipart/related usually contain a text/html part and some associated graphics.
+ "multipart/related"
+ ))
+
+(defun notmuch-show-multipart/*-to-list (part)
+ (mapcar '(lambda (inner-part) (plist-get inner-part :content-type))
+ (plist-get part :content)))
+
+(defun notmuch-show-multipart/alternative-choose (types)
+ ;; Based on `mm-preferred-alternative-precedence'.
+ (let ((seq types))
+ (dolist (pref (reverse notmuch-show-multipart/alternative-discouraged))
+ (dolist (elem (copy-sequence seq))
+ (when (string-match pref elem)
+ (setq seq (nconc (delete elem seq) (list elem))))))
+ seq))
+
+(defun notmuch-show-insert-part-multipart/alternative (msg part content-type nth depth declared-type)
+ (notmuch-show-insert-part-header nth declared-type content-type nil)
+ (let ((chosen-type (car (notmuch-show-multipart/alternative-choose (notmuch-show-multipart/*-to-list part))))
+ (inner-parts (plist-get part :content))
+ (start (point)))
+ ;; This inserts all parts of the chosen type rather than just one,
+ ;; but it's not clear that this is the wrong thing to do - which
+ ;; should be chosen if there are more than one that match?
+ (mapc (lambda (inner-part)
+ (let ((inner-type (plist-get inner-part :content-type)))
+ (if (string= chosen-type inner-type)
+ (notmuch-show-insert-bodypart msg inner-part depth)
+ (notmuch-show-insert-part-header (plist-get inner-part :id) inner-type inner-type nil " (not shown)"))))
+ inner-parts)
+
+ (when notmuch-show-indent-multipart
+ (indent-rigidly start (point) 1)))
+ t)
+
+(defun notmuch-show-insert-part-multipart/* (msg part content-type nth depth declared-type)
+ (notmuch-show-insert-part-header nth declared-type content-type nil)
+ (let ((inner-parts (plist-get part :content))
+ (start (point)))
+ ;; Show all of the parts.
+ (mapc (lambda (inner-part)
+ (notmuch-show-insert-bodypart msg inner-part depth))
+ inner-parts)
+
+ (when notmuch-show-indent-multipart
+ (indent-rigidly start (point) 1)))
+ t)
+
+(defun notmuch-show-insert-part-message/rfc822 (msg part content-type nth depth declared-type)
+ (let* ((message-part (plist-get part :content))
+ (inner-parts (plist-get message-part :content)))
+ (notmuch-show-insert-part-header nth declared-type content-type nil)
+ ;; Override `notmuch-message-headers' to force `From' to be
+ ;; displayed.
+ (let ((notmuch-message-headers '("From" "Subject" "To" "Cc" "Date")))
+ (notmuch-show-insert-headers (plist-get part :headers)))
+ ;; Blank line after headers to be compatible with the normal
+ ;; message display.
+ (insert "\n")
+
+ ;; Show all of the parts.
+ (mapc (lambda (inner-part)
+ (notmuch-show-insert-bodypart msg inner-part depth))
+ inner-parts))
+ t)
+