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authorbors[bot] <26634292+bors[bot]@users.noreply.github.com>2020-11-05 13:09:22 +0000
committerGitHub <[email protected]>2020-11-05 13:09:22 +0000
commit7709b6a2d4b74b5838fbe5b30b6188d6a549b580 (patch)
tree31f0539c641e7a793aeed4d4cb6189e8c1e2a5d7 /crates/ide_db
parentf5b72638bd5a18c4ddbd577930b5deaf64306034 (diff)
parentd2bf2ebe15bd58e6d8937a5894a2363a1ca46b59 (diff)
Merge #6470
6470: Restore semantic token flickering workaround removed in #5697 r=kjeremy a=charlespierce Closes #6452 Info ----- * As discussed in #6452, the `Error('busy')` workaround for semantic token flickering was removed because the underlying issue was believed to be fixed in VS Code. * It turns out that the fix isn't yet complete, so this caused flickering of the semantic highlighting when making rapid edits (e.g. typing quickly). * This PR restores that workaround and makes it slightly more robust, covering all areas of semantic token middleware. Changes ----- * Added middleware functions for `provideDocumentSemanticTokens`, `provideDocumentSemanticTokensEdits`, and `provideDocumentRangeSemanticTokens` to match the 3 possible middleware hooks defined in https://github.com/microsoft/vscode-languageserver-node/blob/master/client/src/common/semanticTokens.ts#L33 * Each intercepts a `null` or `undefined` return and throws an error with the message `busy` instead, which prevents the tokens from being removed and re-added (causing the flickering behavior) Tested ----- * Tested locally that the flickering behavior is gone. * There don't appear to be any significant tests of the VS Code plugin side of things, other than that it loads. Is there somewhere I can / should add tests to cover this behavior? Co-authored-by: Charles Pierce <[email protected]>
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