[webkit-dev] Question for editing experts about Undo/Redo

[Maciej Stachowiak]

Hey everyone,


I was discussing editing client methods with George and Lars, and the  
following came up. WebKit (on the mac at least) appears to re- 
register undo items when you do an undo or redo action. See  
WebEditorClient.mm (registerCommandForUndoOrRedo), and Editor.cpp  
which calls registerCommandforUndo for both the original editing and  
a redo.

But the Cocoa documentation implies that this should not be  
necessary, NSUndoManager should adjust the undo chain on an Undo or  
Redo action: <http://developer.apple.com/documentation/Cocoa/ 
Conceptual/UndoArchitecture/>

Does anyone know why we are explicitly re-registering on undo and redo?

Regards,
Maciej