Add Semantic Highlighting to the TextEditor

[archaeron]

ide-mode gives us back data on how to highlight the sourcecode:
http://docs.idris-lang.org/en/latest/reference/ide-protocol.html#source-code-highlighting

this would need some sort of dynamic grammar

see discussions on how to do it:
https://discuss.atom.io/t/syntax-highlighting-using-existing-tokenizer/13608
https://discuss.atom.io/t/automatically-update-to-dynamic-grammar/10181
https://discuss.atom.io/t/defining-a-language-grammar-via-code/14784/2
https://discuss.atom.io/t/dynamic-grammers/14927/3

[david-christiansen]

The Emacs mode uses an API similar to this one: https://atom.io/docs/api/v0.201.0/TextEditor#instance-decorateMarker

Might want to look into that as well.

[archaeron]

@david-christiansen I thought markers where for things like showing type information, line errors and things like that. Not to change the highlighting. But the doc is not too clear:

Represents a buffer annotation that remains logically stationary even as the buffer changes. This is used to represent cursors, folds, snippet targets, misspelled words, and anything else that needs to track a logical location in the buffer over time.

But I will look at it, thanks :)

[archaeron]

@david-christiansen have you seen this? :)

https://code.visualstudio.com/api/language-extensions/semantic-highlight-guide

[david-christiansen]

It seems they've finally settled on an API, which is good! I'm happy to see more editors get good features.

[archaeron]

the bad part is that it's VS Code and not yet Atom :(

but Atom might follow :)