- simple_viewer = blob.simple_viewer
- rich_viewer = blob.rich_viewer
- active_viewer = rich_viewer && params[:viewer] != 'simple' ? :rich : :simple

= render 'projects/blob/viewer_wrapper', viewer: simple_viewer, hidden: (active_viewer != :simple)

- if rich_viewer
  = render 'projects/blob/viewer_wrapper', viewer: rich_viewer, hidden: (active_viewer != :rich)