Contents

module Vedeu

  # This module allows the sharing of presentation concerns between the models:
  # Interface, Line and Stream.
  #
  # @api private
  module Presentation

    # Returns the colour attributes of the receiving class.
    #
    # @return [Hash]
    def view_attributes
      {
        colour: attributes[:colour],
        style:  attributes[:style],
      }
    end

    # Returns a new Colour instance.
    #
    # @return [Colour]
    def colour
      @colour ||= Colour.new(attributes[:colour])
    end

    # Returns a new Style instance.
    #
    # @return [Style]
    def style
      @style ||= Style.new(attributes[:style])
    end

    # Converts the colours and styles to escape sequences, and if the parent
    # model has previously set the colour and style, reverts back to that for
    # consistent formatting.
    #
    # @return [String]
    def to_s
      render_colour do
        render_style do
          data
        end
      end
    end

    private

    # @api private
    # @return [String]
    def render_colour(&block)
      [ colour.to_s, yield, parent_colour ].join
    end

    # @api private
    # @return [String]
    def render_style(&block)
      [ style.to_s, yield, parent_style ].join
    end

    # @api private
    # @return [String]
    def parent_colour
      return '' if parent.nil?

      Colour.new(parent[:colour]).to_s
    end

    # @api private
    # @return [String]
    def parent_style
      return '' if parent.nil?

      Style.new(parent[:style]).to_s
    end

  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
vedeu-0.2.0	lib/vedeu/models/attributes/presentation.rb
vedeu-0.1.19	lib/vedeu/models/attributes/presentation.rb