[XeTeX] Coptic typesetting backwards with polyglossia

[Gareth Hughes]

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On 01/04/11 01:31, Jonathan Harmon wrote:
> I was so pleased that the polyglossia package started supporting more
> languages, including Coptic. But when I try to invoke it with
> \textcoptic{} or the coptic environment, it typesets right-to-left, i.e.
> backwards. Interestingly, the problem doesn't seem to exist
> if \textcoptic{} is not invoked. Is there a reason for this, or was
> there a step I missed?
> 
> Here is the text of the example file:
> 
> \documentclass{article}
> \usepackage{fontspec,xunicode,xltxtra}
> 
> \usepackage{polyglossia}
> 
> \setmainlanguage{english}
> 
> \setotherlanguage{coptic}
> 
> \setmainfont{Antinoou}
> 
> \newfontfamily\copticfont{Antinoou}
> 
> \begin{document}
> 
> Here is some English text.
> 
> \bigskip
> 
> And now for the Coptic:
> 
> ⲛⲁⲉⲓ ⲛⲉ ⲛ̅ϣⲁϫⲉ ⲉⲑⲏⲡ ⲉⲛⲧ-ⲁ-ⲓ̅ⲥ̅
> 
> \textcoptic{ⲛⲁⲉⲓ ⲛⲉ ⲛ̅ϣⲁϫⲉ ⲉⲑⲏⲡ ⲉⲛⲧ-ⲁ-ⲓ̅ⲥ̅}
> 
> \begin{coptic}
> 
> ⲛⲁⲉⲓ ⲛⲉ ⲛ̅ϣⲁϫⲉ ⲉⲑⲏⲡ ⲉⲛⲧ-ⲁ-ⲓ̅ⲥ̅
> 
> \end{coptic}
> 
> \end{document}

The problem is in the file
TEXMF/tex/xelatex/polyglossia/gloss-coptic.ldf which says

> \PolyglossiaSetup{coptic}{
>   script=Coptic,
>   direction=RL,
>   scripttag=copt,
>   langtag=COP,
>   hyphennames={coptic},
>   hyphenmins={2,2},
>   fontsetup=true
> }

If that's changed to direction=LR, Coptic should work properly.

Gareth.
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