+ ;; Get the reply object as SEXP, and parse it into an elisp object.
+ (setq reply (apply #'notmuch-call-notmuch-sexp args))
+
+ ;; Extract the original message to simplify the following code.
+ (setq original (plist-get reply :original))
+
+ ;; Extract the headers of both the reply and the original message.
+ (let* ((original-headers (plist-get original :headers))
+ (reply-headers (plist-get reply :reply-headers)))
+
+ ;; If sender is non-nil, set the From: header to its value.
+ (when sender
+ (plist-put reply-headers :From sender))
+ (let
+ ;; Overlay the composition window on that being used to read
+ ;; the original message.
+ ((same-window-regexps '("\\*mail .*")))
+
+ ;; We modify message-header-format-alist to get around a bug in message.el.
+ ;; See the comment above on notmuch-mua-insert-references.
+ (let ((message-header-format-alist
+ (loop for pair in message-header-format-alist
+ if (eq (car pair) 'References)
+ collect (cons 'References
+ (apply-partially
+ 'notmuch-mua-insert-references
+ (cdr pair)))
+ else
+ collect pair)))
+ (notmuch-mua-mail (plist-get reply-headers :To)
+ (plist-get reply-headers :Subject)
+ (notmuch-headers-plist-to-alist reply-headers)
+ nil (notmuch-mua-get-switch-function))))
+
+ ;; Insert the message body - but put it in front of the signature
+ ;; if one is present, and after any other content
+ ;; message*setup-hooks may have added to the message body already.
+ (save-restriction
+ (message-goto-body)
+ (narrow-to-region (point) (point-max))
+ (goto-char (point-max))
+ (if (re-search-backward message-signature-separator nil t)
+ (if message-signature-insert-empty-line
+ (forward-line -1))
+ (goto-char (point-max))))
+
+ (let ((from (plist-get original-headers :From))
+ (date (plist-get original-headers :Date))
+ (start (point)))
+
+ ;; message-cite-original constructs a citation line based on the From and Date
+ ;; headers of the original message, which are assumed to be in the buffer.
+ (insert "From: " from "\n")
+ (insert "Date: " date "\n\n")
+
+ ;; Get the parts of the original message that should be quoted; this includes
+ ;; all the text parts, except the non-preferred ones in a multipart/alternative.
+ (let ((quotable-parts (notmuch-mua-get-quotable-parts (plist-get original :body))))
+ (mapc (apply-partially 'notmuch-mua-insert-quotable-part original) quotable-parts))
+
+ (set-mark (point))
+ (goto-char start)
+ ;; Quote the original message according to the user's configured style.
+ (message-cite-original))))
+
+ (goto-char (point-max))
+ (push-mark)
+ (message-goto-body)
+ (set-buffer-modified-p nil))