Just wondering if it's possible for Fragaria to support mixed mode syntax highlighting (the most obvious case being HTML/CSS/JS).
At present, no.
It isn't a usage case that I would be interested in just at the minute so it is unlikely that I will try and implement mixed node behaviour in the near future.
However, it should be fairly straightforward to implement. Something like:
Thanks Jonathan. If I start using Fragaria heavily, I'll certainly look into adding that feature.