[XeTeX] Kerning support

[Will Robertson]

On 17/04/2008, at 6:43 PM, John Was wrote:
> I think intercharacter tokens could be problematic

Yeah; as Jonathan pointed out to me when this feature was first  
introduced, interchar tokens are inserted regardless of the font; it  
would be possible to detect the font and conditionally insert the  
kerning, but that would mess up other uses for the interchar feature  
(namely, detecting when a certain script changes).

So while you could do it for an ad hoc purpose, it's really not the  
way to go :)

Will
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