That should work for Ibn Saeed, but it's not a complete solution.  For
example it does not work if one wants to write "page x of y" instead, with
"page" and "y" written in Arabic/Persian.  Then the text of the header is
partly LTR and part RTL.

This is still simple and I can use my hacky solution and mix \lefttoright
and \righttoleft to get it right.  But is it possible to extend the
\setupdirections[bidi=on] to apply to parts other than the main text?  I
just noticed this does not apply to footnotes either.  Having numbers in
the TRL footnote text produces incorrect typesetting.

On Tue, Jan 19, 2016 at 5:20 AM, Wolfgang Schuster <
schuster.wolfgang@gmail.com> wrote:

> Ibn Saeed <ibnsaeed@gmail.com>
> 19. Januar 2016 um 04:54
>
> Mohammad Hossein Bateni <bateni <at> gmail.com> writes:
>
>
> One hacky way to fix it is the following:
>
> \setupheadertexts        [{\getmarking[chapter]}]
>
> [{\lefttoright\pagenumber}]        [{\lefttoright\pagenumber}]
> [{\getmarking[chapter]}]
>
> Ideally \setupdirections[bidi] or something like that should be used, as I
>
> mentioned in the other thread; that'll fix a bunch of other problems, as
> well
>
> I did enable \setupdirections[bidi=global] and it did not help.
>
> Here is how it was solved. I could not use your solution as it would move
> the position of the page number of the even page on top of the chapter name.
>
> So here is the solution derived from your answer, which works for my
> scenario.
>
> \setupheader[margin][
> 	style=\righttoleft,
> 	state=normal
> 	]
>
> \setupheadertexts
>         [{\righttoleft\getmarking[chapter]}]    [{\pagenumber}]
>         [{\pagenumber}]        [{\righttoleft\getmarking[chapter]}]
>
>
> As Hans told you you can change the style for the header text in the left
> side only:
>
> \setupheader[leftstyle=\righttoleft]
>
> \setupheadertexts
>   [chapter]    [pagenumber]
>   [pagenumber] [chapter]
>
> \setuppagenumbering[alternative=doublesided]
>
> \starttext
> \dorecurse{10}{\expanded{\chapter{Chapter \recurselevel}}}
> \stoptext
>
> Wolfgang
>
>
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