Re: about assign direction types for characters

Thanks a lot!

‘You cannot do this in the first place, because the parts of the UBA
before that need to distinguish between segment separators, paragraph
separators, and whitespace.’
I think you lose a ‘not’ behind 'need'. Is that right?

On Sun, Oct 9, 2011 at 9:20 PM, Eli Zaretskii <eliz_at_gnu.org> wrote:

> > Date: Sun, 9 Oct 2011 18:21:43 +0800
> > From: li bo <libo.imc_at_gmail.com>
> > List-software: Ecartis version 1.0.0
> >
> > Before determining embedding levels for characters, assign directional
> types
> > like this
> > // assign directional types
> > classify(pszInput, types, cch);
> > And after determining embedding levels, assign directional types again
> ,but
> > for WS,S
> > // assign directional types again, but for WS, S this time
> > classify(pszInput, types, cch, true);
> >
> > Why not assign directional types for WS and S in the first time?
>
> The second call to 'classify' is due to L1, which says that certain
> types of characters should have their level reset to the paragraph
> embedding level.
>
> You cannot do this in the first place, because the parts of the UBA
> before that need to distinguish between segment separators, paragraph
> separators, and whitespace. L1 is one of the last stages of
> processing, when the original bidi properties were already taken into
> account, so it is possible at this stage to reset the levels of these
> characters.
>
Received on Mon Oct 10 2011 - 05:29:10 CDT