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TypeScript semantic tokens: use range provider

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This commit is contained in:
Martin Aeschlimann
2020-04-09 18:25:12 +02:00
parent fcca161eb8
commit ef715cf8c5
2 changed files with 20 additions and 10 deletions
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12
extensions/typescript-language-features/src/features/semanticTokens.ts
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@@ -14,20 +14,19 @@ import { TokenType, TokenModifier, TokenEncodingConsts, VersionRequirement } fro
const minTypeScriptVersion = API.fromVersionString(`${VersionRequirement.major}.${VersionRequirement.minor}`);
// as we don't do deltas, for performance reasons, don't compute semantic tokens for documents above that limit
const CONTENT_LENGTH_LIMIT = 100000;
export function register(selector: vscode.DocumentSelector, client: ITypeScriptServiceClient) {
return new VersionDependentRegistration(client, minTypeScriptVersion, () => {
const provider = new DocumentSemanticTokensProvider(client);
return vscode.Disposable.from(
vscode.languages.registerDocumentSemanticTokensProvider(selector, provider, provider.getLegend()),
// register only as a range provider
vscode.languages.registerDocumentRangeSemanticTokensProvider(selector, provider, provider.getLegend()),
);
});
}
// as we don't do deltas, for performance reasons, don't compute semantic tokens for documents above that limit
const CONTENT_LENGTH_LIMIT = 100000;
/**
* Prototype of a DocumentSemanticTokensProvider, relying on the experimental `encodedSemanticClassifications-full` request from the TypeScript server.
* As the results retured by the TypeScript server are limited, we also add a Typescript plugin (typescript-vscode-sh-plugin) to enrich the returned token.
@@ -52,9 +51,10 @@ class DocumentSemanticTokensProvider implements vscode.DocumentSemanticTokensPro
async provideDocumentRangeSemanticTokens(document: vscode.TextDocument, range: vscode.Range, token: vscode.CancellationToken): Promise<vscode.SemanticTokens | null> {
const file = this.client.toOpenedFilePath(document);
if (!file || document.getText().length > CONTENT_LENGTH_LIMIT) {
if (!file || (document.offsetAt(range.end) - document.offsetAt(range.start) > CONTENT_LENGTH_LIMIT)) {
return null;
}
const start = document.offsetAt(range.start);
const length = document.offsetAt(range.end) - start;
return this._provideSemanticTokens(document, { file, start, length }, token);