Re: Passing unicode characters

["Mehdi Omidali" <mehdioa@gmail.com>]

Dear Mojca,
Thanks to the conversion option I found a clean way to setup a good
left-to-right layout. But I found a mysterious bug in the
bidirectional algorithm. Please run the attached file and look at the
formula.

%%%%%%%%%%%%%%%%%%
% engine=luatex
\def\FarsiGlobalDir {\pagedir TRT\bodydir TRT\pardir TRT\textdir TRT}
\definestartstop
  [farsidocument]
  [commands={\FarsiGlobalDir},before=\page,after=\page]

\starttext

\startfarsidocument

\placeformula[formula1] $$y=123456789x^2$$

hi\footnote{hi}
\page
\stopfarsidocument
Why the formula in the previous page is not shown correct.
\stoptext


On 7/23/08, Mojca Miklavec <mojca.miklavec.lists@gmail.com> wrote:
> On Tue, Jul 22, 2008 at 9:39 PM, Mehdi Omidali wrote:
>> Dear Mojca,
>> Thanks for your complete answer. In fact, in persian (and maybe
>> arabic) documents, we need every digit be in persian,
>
> But when you write, you probably write numbers in persian already?
>
>> like chapter,
>> section,
>
> \chapter and \section are a bit buggy as far as numbering is
> concerned, but you can use
>   \setuphead
>     [section]
>     [conversion=arabicnumerals]
>
>> figure, and even formula numbers
>
> Try
>    \defineconversion [ar] [numbers] [\arabicnumerals]
>
> This one doesn't work on sections (same argument as Aditya pointed
> out), but it does quite a lot already :)
> Can you try it out and report? I didn't try it out (no idea how to
> work with Arabic), but I consider it a much cleaner approach than
> redefining characters in fonts.
>
> (You could also use \setupformulas[conversion=arabicnumerals], similar
> for tables, ..., but in theory you should not need anything else but
> \defineconversion [ar] [numbers] [\arabicnumerals] in lang-ara.tex if
> that's of general interest.)
>
>> (most of the people even
>> prefer persian digits in formulas which is possible in xetex).
>> As you know, the Mapping=farsidigits in a font definition works
>> perfect in xelatex.
>
> I would say that ConTeXt lacks a nice interface for that at the
> moment. There is tlig/trep feature that works that way (remaps ' to
> rightquote for example), but it's spread all over the place and might
> be likely to change. One option are fea files (like the one Idris
> pointed you to).
>
> Still, I would go for "conversion", not for redefining fonts.
> Redefining fonts is just an ugly hack that happens to solve a problem
> temporary. People use it just because it's too difficult to do it in
> some other way.
>
> Mojca
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