Formula numbers in RTL mode

Formula numbers in RTL mode

[Mohammad Hossein Bateni]

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Hi Hans,

I recall something like this was reported a few months back, and you said
you were reworking math alignment mechanisms at the time.  Now that you're
getting ready for the Tex Live version, I want to bring attention to this
issue once again, in the hope of getting it resolved.

Formula numbers are not placed at the far end when in RTL.  Here is a MWE:


\starttext

\input knuth

\placeformula
\startformula
E = mc^2.
\stopformula

\righttoleft

\placeformula
\startformula
E = mc^2.
\stopformula

\stoptext


Attached is the result from context version 2017.05.14 19:09.   Using
\setupformula[location=left] gives similar results with directions swapped:
output is as desired in LTR but slightly off the edge in RTL.

Thanks,
MHB

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Re: Formula numbers in RTL mode

[Mohammad Hossein Bateni]

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For the record, here is my solution until the issue is fixed for RTL.

\setupformula[distance=0pt]

This causes the formula numbers to be at the proper place for left/right as
well as LTR/RTL.  It prevents some custom placement of the formula number,
which I do not care about.

—MHB

On Mon, May 15, 2017 at 11:09 PM, Mohammad Hossein Bateni <bateni@gmail.com>
wrote:

> Hi Hans,
>
> I recall something like this was reported a few months back, and you said
> you were reworking math alignment mechanisms at the time.  Now that you're
> getting ready for the Tex Live version, I want to bring attention to this
> issue once again, in the hope of getting it resolved.
>
> Formula numbers are not placed at the far end when in RTL.  Here is a MWE:
>
>
> \starttext
>
> \input knuth
>
> \placeformula
> \startformula
> E = mc^2.
> \stopformula
>
> \righttoleft
>
> \placeformula
> \startformula
> E = mc^2.
> \stopformula
>
> \stoptext
>
>
> Attached is the result from context version 2017.05.14 19:09.   Using
> \setupformula[location=left] gives similar results with directions swapped:
> output is as desired in LTR but slightly off the edge in RTL.
>
> Thanks,
> MHB
>

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Re: Formula numbers in RTL mode

[Hans Hagen]

On 5/26/2017 5:02 AM, Mohammad Hossein Bateni wrote:
> For the record, here is my solution until the issue is fixed for RTL.
> 
> \setupformula[distance=0pt]
> 
> This causes the formula numbers to be at the proper place for left/right 
> as well as LTR/RTL.  It prevents some custom placement of the formula 
> number, which I do not care about.
the problem is that we need a proper model for l2r math

i cc idris as logn ago he started on a document describing how r2l 
layouts should be configureable (and what shoule be default)

for instance: we can start from a r2l text flow but formulas still r2l

basically it's no big deal to make things configureable and semi 
automaytic but we need a good model for consistency, not some stepwise 
(inconstent) choices

so the question is: can you (and idris) come up with a reasonable model 
for l2r / r2l and mixed (keep in mind that we can also have r2l formulas 
already)

Hans



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