module ActionView #:nodoc:

  # <tt>ActionView::Base.swf_default_options</tt> is a hash that
  # will be used to specify defaults in priority to the standard
  # defaults.
  class Base
    @@swf_default_options = {}
    cattr_accessor :swf_default_options
  end

  module Helpers # :nodoc:
    module AssetTagHelper
      
      # Computes the path to an swf asset in the public 'swfs' directory.
      # Full paths from the document root will be passed through.
      # Used internally by +swf_tag+ to build the swf path.
      #
      # ==== Examples
      #     swf_path("example")                            # => /swfs/example.swf
      #     swf_path("example.swf")                        # => /swfs/example.swf
      #     swf_path("fonts/optima")                       # => /swfs/fonts/optima.swf
      #     swf_path("/fonts/optima")                      # => /fonts/optima.swf
      #     swf_path("http://www.example.com/game.swf")    # => http://www.example.com/game.swf
      #   
      # It takes into account the global setting +asset_host+, like any other asset:
      #   
      #     ActionController::Base.asset_host = "http://assets.example.com"
      #     image_path("logo.jpg")                         # => http://assets.example.com/images/logo.jpg
      #     swf_path("fonts/optima")                       # => http://assets.example.com/swfs/fonts/optima.swf
      #
      def swf_path(source)
        if defined? SwfTag
          SwfTag.new(self, @controller, source).public_path
        else
          compute_public_path(source, SwfAsset::DIRECTORY, SwfAsset::EXTENSION)
        end
      end
      alias_method :path_to_swf, :swf_path # aliased to avoid conflicts with a swf_path named route

  private
      module SwfAsset # :nodoc:
        DIRECTORY = 'swfs'.freeze
        EXTENSION = 'swf'.freeze

        def directory
          DIRECTORY
        end

        def extension
          EXTENSION
        end
      end
      
      # AssetTag is available since 2.1.1 (http://github.com/rails/rails/commit/900fd6eca9dd97d2341e89bcb27d7a82d62965bf )
      class SwfTag < AssetTag # :nodoc:
        include SwfAsset
      end if defined? AssetTag 
    end
  end
end