Provide semantic tokens for document range

[radeksimko]

Current Version

0.11.0

Use-cases

Currently the server only provides semantic tokens for the full document, which may result in a higher latency when highlighting larger documents as tokens for the whole document need to be recomputed.

Proposal

In general the textDocument/semanticTokens/range method was designed to allow clients to request tokens just for the visible part of the document and "pre-load" more as the user is scrolling.

It is therefore proposed to provide range-based highlighting, i.e. support this method.

It may be necessary to change SemanticTokensInFile function interface or add a new one (which accepts range) to hcl-lang.

[ndubey-adobe]

Is this being taken up?

[radeksimko]

@ndubey-adobe this is not on our near-term roadmap if that is what you're asking. We would however happily review PRs for that functionality.

Just curious - Is there anything in particular that motivates you to address this problem in particular? Is the highlighting slow in any particular client or any particular circumstance?