[HarfBuzz] Auto Fractions vs VULGAR FRACTION characters

Behdad Esfahbod behdad at behdad.org
Sun Dec 22 16:54:41 PST 2013


Thanks for testing!

On 13-12-22 07:46 PM, James Cloos wrote:
> Try rendering 1⅖ with hb-view.

Very good point.  Indeed, this happens because U+2156 has a compat
decomposition to <0032,2044,0035>, so the fact that it was separated from the
previous digit is lost in the expansion.

One way to work around this is to intercept those decompositions and insert a
ZWSP before them.

Roozbeh, WDYT?

> With a numr/dnom font I get the same as 12⁄5, rather than the same as 1​2⁄5,
> as I’d expect.
> (Note the U+200B ZERO WIDTH SPACE after the 1 in the latter string.)
> I’m at 76fff252.
> Pango-view also renders that string wrong, though differently wrong.
> -JimC
> --
> James Cloos <cloos at jhcloos.com>         OpenPGP: 1024D/ED7DAEA6
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