Re: Attempt for an UNO Undo API

On 10/25/10 14:37, Frank Schönheit wrote:
> Anybody having an opinion on
> 1. whether XUndoManager.undo/redo, when invoked while an Undo context
>     is open, should
>     a. throw
>     b. silently and implicitly close all open contexts
>     c. ignore the call
>     d. other?
> 2. whether XUndoAction.undo/redo should be allowed to raise exceptions
>     (except the always-possible RuntimeException)?
> 3. how to deal with XUndoAction.undo/redo throwing an exception?
>     a. silence the error?
>     b. propagate the error to the caller of XUndoManager.undo/redo
>     c. clear the respective stack, since obviously the top action cannot
>        be invoked, thus the other actions, which may depend on the top
>        action, also can't
>     d. both b. and c.
>
> I tend to 1a., 2-yes, and 3d., but would appreciate any opinion on this.

IIUC, 1a means throwing for a temporary failure, so 3c appears to be too 
aggressive?

Also, question 2 should rather be "what exceptions exactly should be 
raised," right?

-Stephan