+(defun org-list-get-item-number (item struct prevs parents)
+ "Return ITEM's sequence number.
+
+STRUCT is the list structure. PREVS is the alist of previous
+items, as returned by `org-list-prevs-alist'. PARENTS is the
+alist of ancestors, as returned by `org-list-parents-alist'.
+
+Return value is a list of integers. Counters have an impact on
+that value."
+ (let ((get-relative-number
+ (function
+ (lambda (item struct prevs)
+ ;; Return relative sequence number of ITEM in the sub-list
+ ;; it belongs. STRUCT is the list structure. PREVS is
+ ;; the alist of previous items.
+ (let ((seq 0) (pos item) counter)
+ (while (and (not (setq counter (org-list-get-counter pos struct)))
+ (setq pos (org-list-get-prev-item pos struct prevs)))
+ (incf seq))
+ (if (not counter) (1+ seq)
+ (cond
+ ((string-match "[A-Za-z]" counter)
+ (+ (- (string-to-char (upcase (match-string 0 counter))) 64)
+ seq))
+ ((string-match "[0-9]+" counter)
+ (+ (string-to-number (match-string 0 counter)) seq))
+ (t (1+ seq)))))))))
+ ;; Cons each parent relative number into return value (OUT).
+ (let ((out (list (funcall get-relative-number item struct prevs)))
+ (parent item))
+ (while (setq parent (org-list-get-parent parent struct parents))
+ (push (funcall get-relative-number parent struct prevs) out))
+ ;; Return value.
+ out)))
+