to_prawn.rb

module MaRuKu::Out::Prawn
  def to_prawn(pdf)
    @pdf = pdf
    @pdf.font_size = 11
    array_to_prawn(@children)
  end
  
  def array_to_prawn(children)
    children.each do |c|
      send("to_prawn_#{c.node_type}", c)
    end
  end
  
  def to_prawn_paragraph(para)
    @pdf.text para.children.join("\n")
    @pdf.text ' '
  end
  
  def to_prawn_entity(entity)
    puts "Didn't write entity to pdf"
    p entity
  end
  
  # TODO find a less ghetto way to do leading-trailing margins
  def to_prawn_header(header)
    size = { 1 => 16, 2 => 14 }[header.level]
    @pdf.text header.children.join("\n"), :size => size, :style => :bold
    @pdf.text ' '
  end
  
  def to_prawn_div(div)
    if div.attributes[:class] == "signature"
      signature_name = div.children.map.join(" ")
      @pdf.instance_eval do
        text ' ', :size => 30
        stroke_horizontal_line 0, 200
        stroke_horizontal_line 250, 300
        text ' ', :size => 4
        text signature_name
        draw_text "Date", :at => [250, y - bounds.absolute_bottom + 5]
        text ' ', :size => 20
        stroke_horizontal_line 0, 200
        text ' ', :size => 4
        text signature_name + " (Print)"
      end
    else
      puts "Didn't write div to pdf: #{div.inspect}"      
    end
  end
end

MaRuKu::MDElement.send(:include, MaRuKu::Out::Prawn)