Method handleGetTypeAtPosition

internal/api/session.go:1431–1455

handleGetTypeAtPosition returns the type at a position in a file.

(ctx context.Context, params *GetTypeAtPositionParams)

// handleGetTypeAtPosition returns the type at a position in a file.
func (s *Session) handleGetTypeAtPosition(ctx context.Context, params *GetTypeAtPositionParams) (*TypeResponse, error) {
	setup, err := s.setupChecker(ctx, params.Snapshot, params.Project)
	if err != nil {
		return nil, err
	}
	defer setup.done()

	sourceFile := setup.program.GetSourceFile(params.File.ToFileName())
	if sourceFile == nil {
		return nil, fmt.Errorf("%w: source file not found: %v", ErrClientError, params.File)
	}

	positionMap := sourceFile.GetPositionMap()
	node := astnav.GetTouchingPropertyName(sourceFile, positionMap.UTF16ToUTF8(int(params.Position)))
	if node == nil {
		return nil, nil
	}

	t := setup.checker.GetTypeAtLocation(node)
	if t == nil {
		return nil, nil
	}

	return setup.newTypeResponse(t), nil
}

// handleGetTypesAtPositions returns types at multiple positions in a file.
func (s *Session) handleGetTypesAtPositions(ctx context.Context, params *GetTypesAtPositionsParams) ([]*TypeResponse, error) {