determine_template

# File actionview/lib/action_view/renderer/template_renderer.rb, line 20
    def determine_template(options)
      keys = options.has_key?(:locals) ? options[:locals].keys : []

      if options.key?(:body)
        Template::Text.new(options[:body])
      elsif options.key?(:text)
        Template::Text.new(options[:text], formats.first)
      elsif options.key?(:plain)
        Template::Text.new(options[:plain])
      elsif options.key?(:html)
        Template::HTML.new(options[:html], formats.first)
      elsif options.key?(:file)
        with_fallbacks { find_file(options[:file], nil, false, keys, @details) }
      elsif options.key?(:inline)
        handler = Template.handler_for_extension(options[:type] || "erb")
        Template.new(options[:inline], "inline template", handler, :locals => keys)
      elsif options.key?(:template)
        if options[:template].respond_to?(:render)
          options[:template]
        else
          find_template(options[:template], options[:prefixes], false, keys, @details)
        end
      else
        raise ArgumentError, "You invoked render but did not give any of :partial, :template, :inline, :file, :plain, :text or :body option."
      end
    end