module Qadmin
  module Overlay

    def self.included(other)
      other.module_eval do
        helper_method :overlay?
      end
    end

    protected
    def layout_or_overlay(options = {})
      @_overlay = false
      fallback_layout = options[:default] || 'admin'
      if (options[:only] && !Array(options[:only]).include?(action_name)) || (options[:except] && Array(options[:except]).include?(action_name))
        return fallback_layout
      end
      if params[:_overlay]
        @_overlay = true
        false 
      else
        fallback_layout
      end
    end

    # 
    def overlay?
      @_overlay && @_overlay == true
    end

  end
end