Exposing the font family name to AccessKit

[mwcampbell]

It's common for accessibility APIs to expose the font family name for each run of text. But unless I'm missing something, this information isn't available to Parley's layout code. Specifically, all that's available in the LayoutData struct is a Vec<FontData>, and FontData only has the font data itself, not a name. Any suggestions about how to solve this?

[nicoburns]

The name(s) are technically in the FontData (in the name table of the font), but I agree that it would be useful if this was easier to access. This would also be useful for debugging purposes. The user-specified font-stack is also available from run.style(), but that doesn't account for which font was selected during font-fallback

[mwcampbell]

If there's a fairly easy way to pull a name out of the font data itself, maybe with help from one of the Fontations crates, then that might be good enough for now.