[XeTeX] xetex and the unicode bidirectional algorithm.

[Zdenek Wagner]

2013/12/4 C. Scott Ananian <cscott at cscott.net>:
> On Tue, Dec 3, 2013 at 5:33 PM, Khaled Hosny <khaledhosny at eglug.org> wrote:
>> On Tue, Dec 03, 2013 at 01:42:21PM -0500, C. Scott Ananian wrote:
>>> Does XeLaTeX implement the Unicode BiDi algorithm?
>>
>> Short answer: no.
>>
>> I think sample documents (minimal working example) are needed for any
>> useful suggestion.
>
>
> Attached are the first 23 references from
> https://ar.wikipedia.org/wiki/%D8%A5%D8%B3%D8%B7%D9%86%D8%A8%D9%88%D9%84#.D9.85.D8.B5.D8.A7.D8.AF.D8.B1
> (the Arabic wikipedia article on Istanbul), as generated by my XeLaTeX
> formatter.
>
> Things to notice:
> 1) Unicode BiDi algorithm at work in web version in places like
> citation [1], "Statistics of the 2010 Turkey census".  XeLaTeX renders
> this backwards.
> 2) Broken italic for arabic in GNU freefont in citation [2].
> (straightforward to fix)

GNU FreeSerif does not contain arabic in the italic shape, only
regular and bold is supported.

> 3) Arabic comma instead of English comma in citation [23]. (in both
> web and XeLaTeX output)
>
The engine cannot recognize the context if the language is not tagged,
the comma will always be displayed using the default language.

> Item #1 is the one I'd really appreciate suggestions for fixing.
>   --scott
>
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>                          ( http://cscott.net/ )
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-- 
Zdeněk Wagner
http://hroch486.icpf.cas.cz/wagner/
http://icebearsoft.euweb.cz