Re: RTL directionality in LaTeX

Hi All,

I have developed the RyDArab package for composing Arabic mathematical
notation in LaTeX.

It works very well; however, I don’t maintained any more since some years
ago.

In RyDArab, We can choose the default notation in preamble:

\usepackage[options]{rydarab} with options are: arabmath, latinmath, …

and we can specify another in a local expression by: \arabmath, \latinmath,
…

as is presented in attachment file or in RyDArab package :

http://www.ucam.ac.ma/fssm/rydarab/system/zip/rydarab.rar

We find also all possible notation’s translation and Arabic mathvariants.

Azzeddine


2013/11/5 Ross Moore <ross.moore@mq.edu.au>

> Hi David,
>
> On 06/11/2013, at 8:07 AM, David Carlisle wrote:
>
> > On 05/11/2013 20:34, Ross Moore wrote:
> >> Directionality is a property of the math environment, not of the
> >> content in that environment
> >
> >
> > Usually but not always. After the review of use cases in the Arabic math
> > note, directionality in MathML3 is allowed at the level of <mrow>, not
> > just on the top level <math>. (Whether any particular TeX or MathML
> > rendering agent can support switching at that level is another issue but
> > the specification allows it.)
>
> OK. Thanks for that clarification.
>
>
> On 06/11/2013, at 8:43 AM, Khaled Hosny wrote:
>
> > On Wed, Nov 06, 2013 at 07:34:05AM +1100, Ross Moore wrote:
> >> I would vote for inserting something like \mathdir{rtl}
> >
> > Please note that \mathdir is already an Omega/Aleph/LuaTeX[1] primitive
> > name.
> >
> > Regards,
> > Khaled
> >
> > 1. In case of LuaTeX it is "hidden" by default, but formats my choose to
> >   enable it.
>
>
> With this information, my advice would be to have a macro that
> effectively just sets a switch, in the usual TeX-like way,
> whose value is confined to a brace-delimited environment.
> Internal macro expansion either respects the value of that switch
> or ignores it.
> The details are left to developers to fill in.
>
> e.g. user-syntax could be:
>   \[
>      x^2 + 2\,x + 1 =
>     \begin{cases}
>           (x+1)^2 & \text{ in Roman LTR script (LTR)}\\
>       {\setmathdir{rtl} (x+1)^2 } & \text{in Arabic (RTL)}
>     \end{cases}
>   \]
>
> Thus in Omega/Aleph/LuaTeX  the primitive is set locally.
> Other formats would need to implement much more to get it right,
> or just gobble the argument and issue a warning message that
> directionality support is not yet available.
>
> This is in accordance, I think, with the discussion here:
>
>   http://tug.org/pipermail/luatex/2012-December/003929.html
>
> where direct use of the primitive is delimited.
>
>
> >
> > David
>
>
> Hope this helps,
>
>         Ross
>
> ------------------------------------------------------------------------
> Ross Moore                                       ross.moore@mq.edu.au
> Mathematics Department                           office: E7A-206
> Macquarie University                             tel: +61 (0)2 9850 8955
> Sydney, Australia  2109                          fax: +61 (0)2 9850 8114
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>
>