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

Maciej Stachowiak mjs at apple.com
Fri Feb 23 01:19:39 PST 2007

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/ 

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


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