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[EMFStore] Redo capability [message #1703283]

Thu, 30 July 2015 09:52

Taras Vuyiv

Messages: 4
Registered: July 2015

Junior Member

Hello guys!

On my EMF based plugin I'm using the EMFStores UIUndoLastOperationController to perform undo action on the local project. Logically, if there is undo should be redo also.
But after some time of investigation I couldn't find anything that will match opposite to UndoLastOperation functionality.

So, is there any way to fulfill the redo action for the whole local project?

Thanks.

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Re: [EMFStore] Redo capability [message #1703683 is a reply to message #1703283]

Tue, 04 August 2015 08:54

Johannes Faltermeier

Messages: 96
Registered: December 2013

Member

Hi,

The EMFStore Operation Manager does not work like a command stack. When an undo is performed, we undo the changes on the model and remove the now undone operations from the list of saved operations.
That is why we don't have redo support, since the undo will remove the required information.

For your problem I can see two possible solutions:
#1) You could make a contribution so that ProjectSpaceBase.undoLastOperations(int) returns the undone operations. Accordingly the UI controller should do so as well. Based on the returned operations you could add a custom redo support in your code.
#2) The second approach would be to write an own UI undo controller, which gives you access to the operations. You can get the list of operations from ProjectSpace#getLocalChangePackage(). Calling #.removeAtEnd() on the change package will give you access to the operations. This approach does not require changes to EMFStore.

Cheers
Johannes

Johannes Faltermeier

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