[O] undo-tree and Org visibility

[Samuel Wales]

When I went back and forth with undo-tree, Org did not show the same
visibility that it did during each stage, so I added this defadvice.
What it does is make everything visible.

(defadvice undo-tree-undo (after org-undo-reveal activate compile)
  "Make point and context visible after an undo command in org-mode."
  (alpha-org-reveal-for-undo))
;;might be nec, not sure why
(defadvice undo-tree-redo (after org-undo-reveal activate compile)
  "Make point and context visible after an undo command in org-mode."
  (alpha-org-reveal-for-undo))
(defun alpha-org-reveal-for-undo ()
  (when (and (eq major-mode 'org-mode)
             (outline-invisible-p))
     (org-reveal t)))

However, this is also confusing, because I often move headlines, and
revealing everything takes up the whole screen.  Therefore it is not
possible to show where the headline was moved to or from.

What I want is for Org to show the same visibility that it did originally.

Is this possible to do efficiently, and if not, can Emacs be changed
to support it in the next version?

Thanks.

Samuel

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