Re: highlighting non-ASCII characters

[Ted Zlatanov]

On Fri, 26 Mar 2010 23:50:26 +0100 Lennart Borgman <address@hidden> wrote: 

LB> Thanks, but what would the difference be to try confusable detection
LB> instead of chars outside IDN?

They are two different character sets.  The IDN chars are fewer and have
a specific purpose for IDN; confusable characters are any Unicode
characters mapped to homoglyphs.

LB> I believe marking confusable chars would also mean marking those
LB> confusable chars that have been decided on in IDN.

Yes, probably.  But that's accidental.  I still think the character
classes [:idn:] (revised name from before) and [:confusable:] (or
[:homoglyph:]) would make sense as a first step, then we can decide how
to highlight them.

LB> Perhaps they could also be handled in another way (for example helping
LB> switching/rotating the confusable chars, all or one-by-one). Would
LB> that be useful?

I don't know what you mean by switching/rotating, sorry.

LB> Still I think it could be a good idea to restrict identifier names to
LB> chars within IDN.

We're talking about generic text in Emacs, so I think IDN should be
limited to places in Emacs where domain names show up (e.g. URLs).

Ted