[bug #25607] NSUndoManager sends NSUndoManagerCheckpointNotification when opening a top-level undo group

[matt rice]

Follow-up Comment #4, bug #25607 (project gnustep):

hmmm, for the record i was looking here

http://developer.apple.com/DOCUMENTATION/Cocoa/Conceptual/UndoArchitecture/Tasks/UsingUndoNotif.html#//apple_ref/doc/uid/20000210

where it says

"whenever an NSUndoManager opens or closes a new undo group (except when it
opens a top-level group)"

the actual API reference has a different wording which makes me believe that
the API may have changed.

http://developer.apple.com/documentation/Cocoa/Reference/Foundation/Classes/NSUndoManager_Class/Reference/Reference.html#//apple_ref/occ/instm/NSUndoManager/beginUndoGrouping

"This method posts an NSUndoManagerCheckpointNotification unless a top-level
undo is in progress."

that top documentation is also rather old, but is also reflected in the
webobjects documentation and is the behaviour that gdl2 currently targets,
anyhow if it doesn't match the foundation behaviour i suppose we'll have to
figure something out....

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