Class: Barcodes::Symbology::Code11

Inherits:
Base
  • Object
show all
Defined in:
lib/barcodes/symbology/code11.rb

Overview

This class represents the Code 11 symbology. Code 11 can encode the numbers 0-9 and the ‘-’ dash symbol.

More info: en.wikipedia.org/wiki/Code_11

Instance Attribute Summary

Attributes inherited from Base

#alpha, #bar_height, #bar_width, #caption_height, #caption_size, #captioned, #color, #data

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#caption_data, #encoded_data, #height, #quiet_zone_width, #valid?, #width

Constructor Details

#initialize(args = {}) ⇒ Code11

Creates a new Code11 instance.



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# File 'lib/barcodes/symbology/code11.rb', line 34

def initialize(args={})
  super(args)
  
  @start_character = 'S'
  @stop_character = 'S'
end

Class Method Details

.charset ⇒ Object

The Code 11 character set 0-9 and the ‘-’ dash symbol.



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# File 'lib/barcodes/symbology/code11.rb', line 19

def self.charset
  ['0','1','2','3','4','5','6','7','8','9','-','S'].collect {|c| c.bytes.to_a[0] }
end

.valueset ⇒ Object

The Code 11 values set



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# File 'lib/barcodes/symbology/code11.rb', line 24

def self.valueset
  [
    '1010110','11010110','10010110',
    '11001010','10110110','11011010',
    '10011010','10100110','11010010',
    '1101010','1011010','10110010'
  ]
end

Instance Method Details

#checksum ⇒ Object

Calculates the C and K checksums from the barcode data



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# File 'lib/barcodes/symbology/code11.rb', line 50

def checksum
  if valid?
    unless @data.length >= 10
      c_value = self._checksum(@data, 10)
      return c_value
    else
      c_value = self._checksum(@data, 10)
      k_value = self._checksum(@data + c_value, 9)
      return c_value + k_value
    end
  end
end

#formatted_data ⇒ Object

Start character + data + checksum + stop character



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# File 'lib/barcodes/symbology/code11.rb', line 42

def formatted_data
  checksum = self.checksum
  unless checksum.nil?
    @start_character + @data + checksum + @stop_character
  end
end