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http://www.openoffice.org/issues/show_bug.cgi?id=8302





------- Additional comments from [EMAIL PROTECTED] Fri May 25 14:37:27 +0000 
2007 -------
I think the approach is valid and can be used. Some details:

- The order of the undo actions has to be unmerge-insert-merge (add the "insert"
action before the MergeCells calls), otherwise there's an invalid state after 
redo.

- As mentioned on IRC, the actions can be grouped together using
EnterListAction/LeaveListAction.

- Why is the inserting of whole columns excluded? That seems to be the more
common case. The determination of the merged ranges would then have to be
changed from the nested loop to something more efficient.

- If inserting is possible, something similar should be done for deleting cells.

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