Class: Barby::PrawnOutputter

Inherits:
Outputter show all
Defined in:
lib/barby/outputter/prawn_outputter.rb

Instance Attribute Summary collapse

Attributes inherited from Outputter

#barcode

Instance Method Summary collapse

Methods inherited from Outputter

#boolean_groups, #booleans, #encoding, #initialize, register, #two_dimensional?

Constructor Details

This class inherits a constructor from Barby::Outputter

Instance Attribute Details

#color ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 115

def color
  @color
end

#height ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 73

def height
  two_dimensional? ? (ydim * encoding.length) : (@height || 50)
end

#margin ⇒ Object

Margin is used for x and y if not given explicitly, effectively placing the barcode <margin> points from the [left,bottom] of the page. If you define x and y, there will be no margin. And if you don’t define margin, it’s 0.



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# File 'lib/barby/outputter/prawn_outputter.rb', line 88

def margin
  @margin || 0
end

#unbleed ⇒ Object

Defines an amount to reduce black bars/squares by to account for “ink bleed” If xdim = 3, unbleed = 0.2, a single/width black bar will be 2.6 wide For 2D, both x and y dimensions are reduced.



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# File 'lib/barby/outputter/prawn_outputter.rb', line 111

def unbleed
  @unbleed || 0
end

#x ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 92

def x
  @x || margin
end

#xdim ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 100

def xdim
  @xdim || 1
end

#y ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 96

def y
  @y || margin
end

#ydim ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 104

def ydim
  @ydim || xdim
end

Instance Method Details

#annotate_pdf(pdf, opts = {}) ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 19

def annotate_pdf(pdf, opts={})
  with_options opts do
    xpos, ypos = x, y
    orig_xpos = xpos
    orig_color = pdf.fill_color

    pdf.fill_color = color if color

    if barcode.two_dimensional?
      boolean_groups.reverse_each do |groups|
        groups.each do |bar,amount|
          if bar
            pdf.move_to(xpos+unbleed, ypos+unbleed)
            pdf.line_to(xpos+unbleed, ypos+ydim-unbleed)
            pdf.line_to(xpos+(xdim*amount)-unbleed, ypos+ydim-unbleed)
            pdf.line_to(xpos+(xdim*amount)-unbleed, ypos+unbleed)
            pdf.line_to(xpos+unbleed, ypos+unbleed)
            pdf.fill
          end
          xpos += (xdim*amount)
        end
        xpos = orig_xpos
        ypos += ydim
      end
    else
      boolean_groups.each do |bar,amount|
        if bar
          pdf.move_to(xpos+unbleed, ypos)
          pdf.line_to(xpos+unbleed, ypos+height)
          pdf.line_to(xpos+(xdim*amount)-unbleed, ypos+height)
          pdf.line_to(xpos+(xdim*amount)-unbleed, ypos)
          pdf.line_to(xpos+unbleed, ypos)
          pdf.fill
        end
        xpos += (xdim*amount)
      end
    end#if

    pdf.fill_color = orig_color

  end#with_options

  pdf
end

#full_height ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 81

def full_height
  height + (margin * 2)
end

#full_width ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 77

def full_width
  width + (margin * 2)
end

#length ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 65

def length
  two_dimensional? ? encoding.first.length : encoding.length
end

#to_pdf(opts = {}) ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 12

def to_pdf(opts={})
  doc_opts = opts.delete(:document) || {}
  doc_opts[:page_size] ||= 'A4'
  annotate_pdf(Prawn::Document.new(doc_opts), opts).render
end

#width ⇒ Object 



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# File 'lib/barby/outputter/prawn_outputter.rb', line 69

def width
  length * xdim
end