+(defun notmuch-tree-goto-matching-message (&optional prev)
+ "Move to the next or previous matching message.
+
+Returns t if there was a next matching message in the thread to show,
+nil otherwise."
+ (let ((dir (if prev -1 nil))
+ (eobfn (if prev #'bobp #'eobp)))
+ (while (and (not (funcall eobfn))
+ (not (notmuch-tree-get-match)))
+ (forward-line dir))
+ (not (funcall eobfn))))
+
+(defun notmuch-tree-matching-message (&optional prev pop-at-end)
+ "Move to the next or previous matching message"
+ (interactive "P")
+ (forward-line (if prev -1 nil))
+ (if (and (not (notmuch-tree-goto-matching-message prev)) pop-at-end)
+ (notmuch-tree-quit pop-at-end)
+ (when (window-live-p notmuch-tree-message-window)
+ (notmuch-tree-show-message-in))))
+
+(defun notmuch-tree-prev-matching-message (&optional pop-at-end)