paulfioravanti / resume

  module PDF

    # Module representing faking out an image link in the PDF.

    #

    # @author Paul Fioravanti

    module ImageLink

      # The character to be used as filler when placed over images

      # to make a transparent link.

      BAR = "|".freeze

      private_constant :BAR

      # Level of opaqueness for an image link.

      TRANSPARENT = 0

      private_constant :TRANSPARENT

      module_function

      # Generates an image link on the PDF document.

      # This is done for social media, company, and educational

      # institution logos.

      #

      # @param pdf [Prawn::Document]

      #   The PDF to on which to apply the image link.

      # @param logo [Hash]

      #   Presentation information about the target logo for an image link.

      def generate(pdf, logo)

        image, fit, align, link_overlay_start =

          logo.values_at(:image, :fit, :align, :link_overlay_start)

        pdf.image(image, fit: fit, align: align)

        pdf.move_up(link_overlay_start)

        transparent_link(pdf, logo)

      end

      # Generates a set of transparent "bars" (|||) over

      # a section of a PDF document.

      #

      # @param pdf [Prawn::Document]

      #   The PDF to on which to apply the transparent link.

      # @param logo [Hash]

      #   Presentation information about the target logo.

  end

end