There is one more problem with the default method:

\starttext

\setupalign[r2l]

\definefont[arabicfont][Arial*arabic at 20pt]



\setupdirections[bidi=global,method=default]


1.


\stoptext


from right to left perspective it prints "1." (dot after digit 1) as ".1"
(dot before digit 1) however method one and two work correctly.


On Thu, Sep 12, 2013 at 3:10 AM, Hans Hagen <pragma@wxs.nl> wrote:

> On 9/11/2013 5:24 PM, Khaled Hosny wrote:
>
>> On Wed, Sep 11, 2013 at 02:37:35PM +0200, Hans Hagen wrote:
>>
>>> anyway, it would be nice to see where the three methods fail:
>>>
>>
>> Of the three, method one seems to give correct results on all the given
>> tests (I’m yet to test with my own documents).
>>
>> I’m skeptical that bidi can be implemented in a one pass algorithm,
>> there have been a one pass algorithm called “Pretty Good Bidi
>> Algorithm”, but it has its limitation (I never tested it myself).
>>
>
> Sure, although it can be close to okay with some backward and forward
> scanning but I'm nbot really in the mood for that now. Anyhow, for the
> occasional mix of arabic and latin this method works ok. For more extreme
> cases method 'one' will do and method 'two' ... well it depends on
> developments in unicode as this method will be the more configurable one.
> (And I can probably make a faster implementation of method two when
> performance matters.)
>
>
> Hans
>
>
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