Class HoverFeature

client/src/client.ts:1355–1397

}

class HoverFeature extends TextDocumentFeature<TextDocumentRegistrationOptions> {

	constructor(client: BaseLanguageClient) {
		super(client, HoverRequest.type);
	}

	public fillClientCapabilities(capabilites: ClientCapabilities): void {
		const hoverCapability = (ensure(ensure(capabilites, 'textDocument')!, 'hover')!);
		hoverCapability.dynamicRegistration = true;
		hoverCapability.contentFormat = [MarkupKind.Markdown, MarkupKind.PlainText];
	}

	public initialize(capabilities: ServerCapabilities, documentSelector: DocumentSelector): void {
		if (!capabilities.hoverProvider || !documentSelector) {
			return;
		}
		this.register(this.messages, {
			id: UUID.generateUuid(),
			registerOptions: Object.assign({}, { documentSelector: documentSelector })
		});
	}

	protected registerLanguageProvider(options: TextDocumentRegistrationOptions): Disposable {
		let client = this._client;
		let provideHover: ProvideHoverSignature = (document, position, token) => {
			return client.sendRequest(HoverRequest.type, client.code2ProtocolConverter.asTextDocumentPositionParams(document, position), token).then(
				client.protocol2CodeConverter.asHover,
				(error) => {
					client.logFailedRequest(HoverRequest.type, error);
					return Promise.resolve(null);
				}
			);
		};
		let middleware = client.clientOptions.middleware!;
		return Languages.registerHoverProvider(options.documentSelector!, {
			provideHover: (document: TextDocument, position: VPosition, token: CancellationToken): ProviderResult<VHover> => {
				return middleware.provideHover
					? middleware.provideHover(document, position, token, provideHover)
					: provideHover(document, position, token);
			}
		});
	}
}

class SignatureHelpFeature extends TextDocumentFeature<SignatureHelpRegistrationOptions> {