Class: Barcodes::Symbology::Code39

Inherits:
Base
  • Object
show all
Defined in:
lib/barcodes/symbology/code39.rb

Overview

This class represents the Code 39 symbology. Code 39 can encode the numbers 0-9 and all capital letters along with the following symbols: ‘ ’,‘-’, ‘.’,‘$’,‘/’,‘+’,‘%’,‘*’

More info: en.wikipedia.org/wiki/Code_39

Direct Known Subclasses

Code39Extended, Code39Mod43

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

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

Constructor Details

#initialize(args = {}) ⇒ Code39

Creates a new Code39 instance.



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# File 'lib/barcodes/symbology/code39.rb', line 49

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

Class Method Details

.charset ⇒ Object

The Code 39 character set



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# File 'lib/barcodes/symbology/code39.rb', line 21

def self.charset
  [
    '0','1','2','3','4','5','6','7','8','9',
    'A','B','C','D','E','F','G','H','I','J',
    'K','L','M','N','O','P','Q','R','S','T',
    'U','V','W','X','Y','Z',' ','-','.','$',
    '/','+','%','*'
  ].collect {|c| c.bytes.to_a[0] }
end

.valueset ⇒ Object

The Code 39 values set



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# File 'lib/barcodes/symbology/code39.rb', line 32

def self.valueset
  [
    "1010011011010","1101001010110","1011001010110","1101100101010",
    "1010011010110","1010011010110","1011001101010","1011001101010",
    "1101001011010","1011001011010","1101010010110","1011010010110",
    "1101101001010","1010110010110","1101011001010","1011011001010",
    "1010100110110","1101010011010","1011010011010","1010110011010",
    "1101010100110","1011010100110","1101101010010","1010110100110",
    "1101011010010","1011011010010","1010101100110","1101010110010",
    "1011010110010","1010110110010","1100101010110","1001101010110",
    "1100110101010","1001011010110","1100101101010","1001101101010",
    "1001101011010","1001010110110","1100101011010","1001001001010",
    "1001001010010","1001010010010","1010010010010","1001011011010"
  ]
end

Instance Method Details

#caption_data ⇒ Object

Code 39 includes the start and stop symbols in the caption so caption_data is overridden here to return the formatted data string



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# File 'lib/barcodes/symbology/code39.rb', line 59

def caption_data
  self.formatted_data
end

#formatted_data ⇒ Object

Start character + data + stop character



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# File 'lib/barcodes/symbology/code39.rb', line 64

def formatted_data
  @start_character + @data + @stop_character
end