[XeTeX] If font under fontspec

[Gareth Hughes]

Michiel Kamermans wrote:
> Purely from a production point of view: if you have a document for which
> it is important the right fonts are available, making sure the fonts are
> available to whomever needs to compile it might deserve consideration
> too. So that rather than trying to "fix" the source, you throw a compile
> error that the user does not have the prerequisite fonts to accurately
> generate the document that was intended to be generated.
> 
> Just thinking along the original TeX idea that "If it compiles, the
> result is the same for every system it successfully compiles on".

Yes, I can understand your reasoning here. Though perhaps I should have
explained myself better in the first place. The Syriac font Estrangelo
Edessa leaves noticeable white space before the letter ܓ when it is
preceded by a non-joining letter. It seems this is a carry over from old
metal type. Some people see it as a feature rather than a bug, but I
wanted to provide a fairly smart user command for closing up that white
space, and have written something with \XeTeXinterchartoks to do so.
However, it is important that this kerning isn't applied when other
Syriac fonts, which have no gap, are being set.

I hope that makes the situation a little more clear.

Gareth.