Re: [emacs-bidi] using fribidi and Pango

[Tomas Frydrych]

Behdad Esfahbod wrote:
> On Sun, 4 Dec 2005, Eli Zaretskii wrote:
> Yeah, having a callback is a good-enough solution. Having
> different functions is the other good (and more widespread)
> solution.  I don't really like any of them :(.  But if I am to
> choose one, I go multiple-functions way.  I easily get fooled by
> the overhead of the callback.

I think callbacks is the better solution. In AbiWord (I guess in other 
applications) the text lives in a piecetable, and the only way to 
provide you with a continuous string of textual data is for me to walk 
over the piecetable and make a physical copy of the text into some 
temporary buffer. Providing a callback means that you can directly store 
the data in whatever format is most efficient for Pango, rather than 
having to go through a multiple process of converting things into some 
other (temporary) things. Moreover, with the multiple functions you will 
never be able to examine text past the end of the temporary buffer I 
give you, while with callback you can examine as much as is there, 
should you need it.

Tomas

                
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