Re: Luatex (actually Aleph) and Bidi_Mirrored chars in RTL mode

[Khaled Hosny <khaledhosny@eglug.org>]

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On Mon, Jun 09, 2008 at 05:20:23PM +0200, Hans Hagen wrote:
> Arthur Reutenauer wrote:
> > 	Hello,
> > 
> >>                                  Is this a bug, feature, or am I missing
> >> some thing?
> > 
> >   You're not missing anything, it's kind of a misfeature because the
> > Bidi_Mirrored property is not taken in account by ConTeXt (yet).
> > Happily enough, it's one of the things I'm sponsored by Google to
> > implement as a part of my Summer of Code project
> > (http://code.google.com/soc/2008/tex/appinfo.html?csaid=8BC22C657B7F0D0E)
> > -- of course the project is more general and there is a part on
> > bidirectional behaviour, but I didn't get to it yet.  In this case, I
> > guess the mirroring property should be added to char-def.lua and handled
> > accordingly; contrary to XeTeX, LuaTeX doesn't know it intrinsically, so
> > it has to be dealt with at the ConTeXt level.
> 
> this morning i added that info to the main table, but i'm still 
> pondering about how to use if properly ... in tex normally there are 
> explicit mode switches (in the source of the document) which gives 
> ultimate control; there's also the issue of these pardir etc changes 
> that then need to be injected into the node list;
> 
> anyhow, i'll look into it, but whatever solution i come up with, it has 
> to be under user control; i don't want hard coded automatisms that then 
> are hard to bypass (especially implicid properties can result in messy 
> situations, unicode math is a candidate for that)

Giving the user more control is good idea, as long as the correct
behaviour is one of the options.

Regards,
 Khaled
> 
> 
> 
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-- 
 Khaled Hosny
 Arabic localizer and member of Arabeyes.org team

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If your question is of interest to others as well, please add an entry to the Wiki!

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