From a practical point of view, I haven't found a delegate method that allows 
you to alter the proposed attributes. The closest one is one that acts on 
proposed typing attributes, and I assume that could change with moving the 
insertion point, as well as when changing attributes, and would presumably be 
too late in the piece anyway.

From a conceptual point of view, my understanding of MVC means that a user 
initiated action should be reflected in the model (text storage), which should 
push it through to the view, which should mean that doing the changes in the 
text storage "should" be OK...and it works for everything except this case. The 
behavior I'm observing seems to clearly be a case of the view being out of sync 
with the text storage, until you type something, and then it syncs up again.

But anyway, I'm not here to argue what should or should not be the case - the 
fact is that there is an issue, and at this stage, I'm just looking for a 
solution...

Gideon

> 
> That sounds like a dangerous thing to do — you’re violating the expected 
> behavior of the class (i.e. what goes in is the same as what comes out.)
> 
> If you want to alter the characteristics of the text, you should do so before 
> it goes into the text view, or in one of the explicit NSTextView delegate 
> hooks. I’m pretty sure at least one delegate call allows you to alter the 
> text (including its style) that’s about to be inserted.
> 
> —Jens

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