Re: Attempt for an UNO Undo API

Am 25.10.2010 14:37, schrieb Frank Schönheit:
>>> XUndoAction, XUndoManager, XUndoManagerSupplier - find the generated IDL
>>> for the proposed API at
>>> http://udk.openoffice.org/files/documents/23/4795/undo.zip
>>
>> Updated this, just in case somebody wants to have a look at the current
>> evolution.
>
> 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.

Agreeing to all, 1a to "educate" the user of the API to correctly close 
open contexts... :)

Daniel