[NTG-context] Re: Number in a circle

[Kip Warner <kip@thevertigo.com>]

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On Tue, 2024-05-28 at 08:17 +0200, Henning Hraban Ramm wrote:
> Am 27.05.24 um 19:20 schrieb Kip Warner:
> > On Mon, 2024-05-27 at 07:09 +0200, Ryszard Kubiak wrote:
> > > Hi Kip,
> > > 
> > > You may try characters with Unicode slots from U+2460 upto
> > > U+2469.
> > > They mean circled digits and are available in many fonts.
> > 
> > Thanks Ryszard. Those would be perfect, except I can't get them to
> > work
> > in ConTeXt. I tried using the \utfchar{0x2460} but it just displays
> > the
> > number 1.
> > 
> > I am assuming it needs a font that supports it, but I'm not sure
> > how to
> > switch to a supporting font just to typeset that character and then
> > revert back. Is there some way to define a macro?
> 
> You could just define a fallback font, like:
> 
> \definefontfallback[SymbolFB]
>    [file:symbola.otf]
>    [0x00300-0x003FF,0x02100-0x02800,0x1F000-0x20000] % look up the
> right 
> Unicode ranges!
>    [check=no,force=no]
> 
> \definetypeface [myfonts] [rm] [serif] [times] [default] 
> [fallbacks=SymbolFB]
> 
> And then copy the character from a symbol table, no need for a macro.

Hmm, that's a great idea. But I can't seem to get a minimal to work
with https://context-on-web.eu:

   \definefontfallback[SymbolFB]
      [file:symbola.otf]
      [0x00300-0x003FF,0x02100-0x02800,0x1F000-0x20000] % look up the
   right
   Unicode ranges!
      [check=no,force=no]
   
   \definetypeface [myfonts] [rm] [serif] [times] [default]
   [fallbacks=SymbolFB]
   
   \starttext
   \utfchar{0x02460}
   \stoptext

The above just prints the vanilla character '1'. That might be because
the online editor doesn't have access to the font. So I tried compiling
the above locally with the Symbola.otf file in the same directory and
same problem.

-- 
Kip Warner
OpenPGP signed/encrypted mail preferred
https://www.thevertigo.com

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