[luatex] bug in RTL typesetting?

[Taco Hoekwater]

Khaled Hosny wrote:
> On Thu, Apr 02, 2009 at 07:42:38AM +0200, Hartmut Henkel wrote:
>> On Thu, 2 Apr 2009, ??? ????? wrote:
>>
>>> Yes, the equations should appear at the center.
>> maybe, but now the it does the same as aleph. Needs thinking how it
>> should be right...
> 
> I noted that. I think it should be affected only by \mathdir changes,
> when \mathdir is TLT, I think the user expects math to be done the way
> TeX usually does it. I checked FarsiTeX[1] and RyDArab[2] typeset
> samples, and both put the equation in the middle of the page (in 
> FarsiTeX math is always LTR, while RyDArab can typeset RTL math as
> well). I thought that equation number position should be swapped, but
> FarsiTeX don't swap it, so I think it'd be better controlled at macro
> level.
> 
> I think the current behaviour of TRT math is OK.

This is also what I think. Looking at it, I believe the Aleph behaviour
is simply wrong.

Best wishes,
Taco