[XeTeX] Space characters and whitespace

Philip Taylor (Webmaster, Ret'd) P.Taylor at Rhul.Ac.Uk
Thu Mar 3 14:50:22 CET 2011

mskala at ansuz.sooke.bc.ca wrote:
> On Thu, 3 Mar 2011, Philip Taylor (Webmaster, Ret'd) wrote:
>> if XeTeX is predicated on the use of Unicode, it should
>> "understand" the semantics of Unicode code points such
>> as u2009 and u202F and just do the right thing without
>> having to hack things through the use of active characters.
> There are really three separate questions here:
> 1.  Should XeTeX accept Unicode's many space characters in the input, as
> opposed to just using existing TeX commands for spacing?
> 2.  If the answer to #1 is "yes," what exactly should be the consequences
> of each space character?  Grouping this under the same question because
> it's related:  to what extent should the font determine the width and
> nature of each space character?
> 3.  If the answer to #1 is "yes," how should this be implemented - in
> particular, should it be in the engine or by macros?
> It sounds like you're saying "yes" to #1 and "in the engine, not in the
> macros" to #3.

Yes, I am; it does not seem to me to make sense to implement the glyphs
of Unicode without also honouring its non-glyph-contributing elements.

** Phil.

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