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NSTextView undo problem with character after space

I have a text view that I place on another view to support editing text
in my application. Typing in text, and deleting text works fine, but
undo of typing has a strange problem. Say I typed something like:

abc def ghi

then progressively undo my typing the following lines show the state
after each undo:

abc def gh
abc def g
abc def g (didn't delete the g)
abc def (no space after the f)
abc de
abc d
abc d (didn't delete the d)
abc (no space after the c)
ab
a

At the point where the character after the space is not removed, the
NSTextStorageDidProcessEditingNotification notification is not sent, so
it appears that it isn't just a UI issue.

Has anyone seen this behavior before? Any clues on how to fix this? I
am just using a standard textview.

Thanks

Gideon
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References: 
 >Re: [OT] newbie Perl question (From: Randall Crenshaw <email@hidden>)



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