Briefblatt nach DIN 676 - Formblatt B

standard_brief_b.rb

require 'prawn/measurement_extensions.rb'
class StandardBriefB < Prawn::Document

  def initialize(*args)
    super(
      :page_size => 'A4',
      :page_layout => :portrait,
      :margin => [107.4.mm, 8.1.mm, 30.mm, 24.1.mm]
    )
    options = args.last.is_a?(Hash) ? args.last : {}
    font_size(11)
    @schriftart = options[:font] || File.join(File.dirname(__FILE__), 'DejaVuSerif.ttf')
    @datum      = options[:datum] || Date.today
    font(@schriftart)
    @stroke_bounds = false
  end

  def briefkopf
    canvas do
      bounding_box([0,bounds.height], :width => 210.mm, :height => 45.mm) do
        yield if block_given?
        stroke_bounds if @stroke_bounds
      end
    end
  end

  # 20mm vom linken Rand, 45mm vom oberen Rand, 85mm breit, 5mm hoch
  def absenderzeile(*absender)
    absender = absender.to_a.first.to_s
    canvas do
      bounding_box([20.mm, bounds.top - 45.5.mm], :width => 85.mm, :height => 5.mm) do
        stroke_bounds if @stroke_bounds
        font_size(3.mm) do
          text absender
        end
        stroke do
          line_width 0.1.mm
          horizontal_rule
        end
      end
    end
  end

  # 20mm vom linken Rand, 50mm vom oberen Rand, 85mm breit, 40mm hoch
  def adressfeld
    canvas do
      bounding_box([20.mm, bounds.top - 50.mm], :width => 85.mm, :height => 40.mm) do
        stroke_bounds if @stroke_bounds
        yield if block_given?
      end
    end
  end

  # wird aufgerufen, nachdem das Dokument fertiggestellt ist und über dem informationsblock eingefügt
  # 85mm vom linken Rand, 8.1mm vom rechten Rand, 10mm hoch, 96.9mm breit
  def page_info
    canvas do
      page_count.times do |i|
        go_to_page(i+1)
        bounding_box([105.mm, bounds.top - 45.mm], :width => (105 - 8.1).mm, :height => 10.mm) do
          stroke_bounds if @stroke_bounds
          table(
            [
              ['Seite', "#{page_number} / #{page_count}"]
            ],
            :width => 60.mm,
            :position => (105 - 8.1 - 60).mm,
            :align => {0 => :left, 1 => :right},
            :border_width => 0,
            :font_size => 2.mm

          )
        end
      end
    end
  end

  # 85mm vom linken Rand, 8.1mm vom rechten Rand, 35mm hoch (10mm für Seitennummerierung freilassen), 96.9mm breit
  def informationsblock
    canvas do
      bounding_box([105.mm, bounds.top - 55.mm], :width => (105 - 8.1).mm, :height => 35.mm) do
        stroke_bounds if @stroke_bounds
        yield if block_given?
      end
    end
  end

  def betreffvermerk(*betreff)
    betreff = betreff.to_a.first.to_s
    canvas do
      bounding_box([24.1.mm, bounds.top - 97.4.mm], :width => (210-8.1-24.1).mm, :height => 10.mm) do
        stroke_bounds if @stroke_bounds
        font(@schriftart, :style => :bold) do
          text(betreff)
        end
      end
    end
  end

  def brieffuss
    canvas do
      bounding_box([24.1.mm, bounds.bottom + 25.1.mm], :width => (210 - 24.1 - 8.1).mm, :height => 25.mm) do
        stroke do
          line_width 0.1.mm
          horizontal_rule
        end
        yield if block_given?
        stroke_bounds if @stroke_bounds
      end
    end
  end

  def falzmarken
    canvas do
      stroke do
        line_width 0.1.mm
        horizontal_line(bounds.left, bounds.left + 5.mm, :at => (bounds.top - 105.mm))
        horizontal_line(bounds.left, bounds.left + 5.mm, :at => (bounds.top - 210.mm))
      end
    end
  end

  def body
    yield if block_given?
  end

  def render(*args)
    repeat(:all) do
      stroke_bounds if @stroke_bounds
      briefkopf
      absenderzeile
      adressfeld
      informationsblock
      falzmarken
      brieffuss
      betreffvermerk
    end
    body
    page_info
    super
  end

end