# Basic Text Renderer for Box
#
require 'rockit/prettyprint/renderer'

module Rockit
  module PrettyPrint
    module Box
      class TextRenderer < Renderer
        attr_reader :max_horizontal
        attr_reader :horizontal_delim, :vertical_delim
        
        def initialize(maxHorizontal = 80, horizontalDelim = " ",
                       verticalDelim = "\n")
          @max_horizontal = maxHorizontal
          @horizontal_delim = horizontalDelim
          @vertical_delim = verticalDelim
        end

	def render_term(term)
	  # Instead of fiddling with visitors we simply add a uniquely named
	  # method render_as_text to each Box term we support.
	  term.render_as_text(self)
	end
      end

      class H < Term
	def render_as_text(renderer)
	  elements[0..-2].each do |e|
	    renderer.render_term(e)
	    renderer.render_hdelim(num_spaces)
	  end
	  renderer.render_term(elements[-1])
	end
      end

      class V < Term
	def render_as_text(renderer)
	  elements[0..-2].each do |e|
	    renderer.render_term(e)
	    renderer << "\n"
	  end
	  renderer.render_term(elements[-1])
	end
      end
    end
  end
end