class Asciidoctor::PreprocessorReader

def create_include_cursor file, path, lineno
  if ::String === file
    dir = ::File.dirname file
  elsif RUBY_ENGINE_OPAL
    dir = ::File.dirname(file = file.to_s)
  else
    dir = (dir = ::File.dirname file.path) == '' ? '/' : dir
    file = file.to_s
  end
  Cursor.new file, dir, path, lineno
end