Looks great!

I was particularly impressed by the following:

>"A built-in lightweight HTML view widget renders documentation-style markup with cascading styles."

Basically you built a miniature, integrated, embedded, open-source web browser which can parse CSS and render to SDL... very impressive!:

https://github.com/ovenpasta/adi2/blob/master/src/adi-widget...

https://github.com/ovenpasta/adi2/blob/master/src/adi-widget...

Also, it should be possible to easily, easily port this source code to Delphi and/or FreePascal and/or Graeme Geldenhuys' "Blaise" language (A modern, self-hosting Object Pascal compiler, https://github.com/graemeg/blaise) should anyone in those respective communities decide to do that...

Also, if Ada had an {$IFDEF} equivalent, then with proper use of {$IFDEF's} (since the source code is so similar across these language families), the source code could potentially support all of the above languages from a single source code base...

But, of course, maybe that wouldn't be desired... maybe individual ports would serve those other communities better... and then again, maybe it wouldn't!

(Just thinking aloud... :-) )

Anyway, great work, and once again, very impressed by the lightweight HTML view widget!