Undo?

[fabstu]

I'm currently in the process of trying out TCA and I wondered how to interact with the UndoManager. The only post I found is this one from the Swift Forums, which proposes two ways. One being binding UndoManager.registerUndo to a ViewStore and the second proposing a pullback-like .forEach where an UndoManager is somehow passed in. How do you currently use the UndoManager with TCA and what are thinking, where can this lead to?

[fabstu]

For now I'm passing the undoManager from the view on each change to the store, where an environment class gets passed the current state, the undoManager and the arguments for the operation and then does the operation and registers an undo on the passed in undoManager. The undo sends its action through a PassthroughSubject, which I register on startup with the store.

Advantages:

• simple
• actions probably scoped to scene when using multiple windows

Disatvantages:

• passing the undoManager in every action looks weird, but that can be ignored.
• possible issue with the undoManagers' lifetime. Due to this using weak self but not sure whether that fixes all issues.