Subject: bug#15703: [PATCH 1/8] EWW: Support user defined representation for checkbox.

From: Stefan Monnier <[email-masked]>
Date: Fri, 25 Oct 2013 21:54:12 -0400

> Ah, OK, I see.  But it seems like kind of the same ideas, so maybe a
> generic facility would be useful... not a font-lock interaction, but for
> keeping the record of "this string maps to this Unicode symbol"?
> Basically a big hashtable with some user control.  Then
> `prettify-symbols-mode' could use that facility too.

I think it'd be easier to go the other way around: provide an
replacement to use if/when the display font doesn't provide a glyph for
that characters.

        Stefan