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module ActionController
  module Layouts
    extend ActiveSupport::DependencyModule

    depends_on ActionController::Renderer
    depends_on AbstractController::Layouts

    module ClassMethods
      def _implied_layout_name
        controller_path
      end
    end

    private
      def _determine_template(options)
        super
        if (!options.key?(:text) && !options.key?(:inline) && !options.key?(:partial)) || options.key?(:layout)
          options[:_layout] = _layout_for_option(options.key?(:layout) ? options[:layout] : :none, options[:_template].details)
        end
      end

      def _layout_for_option(name, details)
        case name
        when String     then _layout_for_name(name, details)
        when true       then _default_layout(true, details)
        when :none      then _default_layout(false, details)
        when false, nil then nil
        else
          raise ArgumentError,
            "String, true, or false, expected for `layout'; you passed #{name.inspect}"
        end
      end
  end
end