private onHover()

in server/src/session.ts [980:1013]

• 32 lines of code
• 8 McCabe index (conditional complexity)

  private onHover(params: lsp.TextDocumentPositionParams): lsp.Hover|null {
    const lsInfo = this.getLSAndScriptInfo(params.textDocument);
    if (lsInfo === null) {
      return null;
    }
    const {languageService, scriptInfo} = lsInfo;
    const offset = lspPositionToTsPosition(scriptInfo, params.position);
    const info = languageService.getQuickInfoAtPosition(scriptInfo.fileName, offset);
    if (!info) {
      return null;
    }
    const {kind, kindModifiers, textSpan, displayParts, documentation} = info;
    let desc = kindModifiers ? kindModifiers + ' ' : '';
    if (displayParts && displayParts.length > 0) {
      // displayParts does not contain info about kindModifiers
      // but displayParts does contain info about kind
      desc += displayParts.map(dp => dp.text).join('');
    } else {
      desc += kind;
    }
    const contents: lsp.MarkedString[] = [{
      language: 'typescript',
      value: desc,
    }];
    if (documentation) {
      for (const d of documentation) {
        contents.push(d.text);
      }
    }
    return {
      contents,
      range: tsTextSpanToLspRange(scriptInfo, textSpan),
    };
  }