+(defun notmuch-show-lazy-part (part-args button)
+ ;; Insert the lazy part after the button for the part. We would just
+ ;; move to the start of the new line following the button and insert
+ ;; the part but that point might have text properties (eg colours
+ ;; from a message header etc) so instead we start from the last
+ ;; character of the button by adding a newline and finish by
+ ;; removing the extra newline from the end of the part.
+ (save-excursion
+ (goto-char (button-end button))
+ (insert "\n")
+ (let* ((inhibit-read-only t)
+ ;; We need to use markers for the start and end of the part
+ ;; because the part insertion functions do not guarantee
+ ;; to leave point at the end of the part.
+ (part-beg (copy-marker (point) nil))
+ (part-end (copy-marker (point) t))
+ ;; We have to save the depth as we can't find the depth
+ ;; when narrowed.
+ (depth (notmuch-show-get-depth)))
+ (save-restriction
+ (narrow-to-region part-beg part-end)
+ (delete-region part-beg part-end)
+ (apply #'notmuch-show-insert-bodypart-internal part-args)
+ (indent-rigidly part-beg part-end depth))
+ (goto-char part-end)
+ (delete-char 1)
+ (notmuch-show-record-part-information (second part-args)
+ (button-start button)
+ part-end)
+ ;; Create the overlay. If the lazy-part turned out to be empty/not
+ ;; showable this returns nil.
+ (notmuch-show-create-part-overlays button part-beg part-end))))
+