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List:       freedesktop-fribidi
Subject:    [FriBidi] fribidi-vs-unicode, PyArabicShaping, PyByeDie, UAX#9 draft, etc
From:       Behdad Esfahbod <behdad () behdad ! org>
Date:       2013-01-07 7:31:48
Message-ID: 50EA79E4.5020102 () behdad ! org
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Hi,

Some of you may have noticed that (after about 8 years) I fixed a couple real
bugs (though very insignificant) in the bidi algorithm in FriBidi.  Those were
discovered by running FriBidi against the Unicode BidiTest.txt test suite.
The code for that is here:

  https://github.com/behdad/fribidi-vs-unicode

A while back, I ported the Arabic shaping logic in FriBidi to Python.  That
can be found here:

  https://github.com/behdad/pyarabicshaping

Finally, yesterday I wrote a Python reference bidi implementation from
scratch.  Note, it's a *reference* implementation.  Very slow.  It's 150 times
slower than FriBidi.  It does pass all tests and I'm fairly sure that it's
bugfree now:

  https://github.com/behdad/pybyedie

Finally, there's a new draft of UAX#9 out that adds "bidi isolates".  It's a
major update to the algorithm.  The current draft is at:

  http://www.unicode.org/reports/tr9/tr9-28.html#I1

I'm implementing that in the 6.3 branch of pybyedie.  Eventually I hope it
will make it in FriBidi too, though the N0 rule is hard to implement given
FriBidi's API.

Cheers,
-- 
behdad
http://behdad.org/
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