Class: QRCode::Encoder::Segment

Inherits:
Object
  • Object
show all
Defined in:
lib/qrcode/encoder/segment.rb

Overview

Base segment class - defaults to binary (8-bit byte) encoding

Direct Known Subclasses

AlphanumericSegment, NumericSegment

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data) ⇒ Segment 



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# File 'lib/qrcode/encoder/segment.rb', line 17

def initialize(data)
  @data = data.to_s
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/qrcode/encoder/segment.rb', line 15

def data
  @data
end

Class Method Details

.build(data, mode: :auto) ⇒ Array<Segment>

Factory method to build segments from various data types



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# File 'lib/qrcode/encoder/segment.rb', line 49

def self.build(data, mode: :auto)
  case data
  when String
    [create_segment_for_data(data, mode)]
  when Array
    data.map do |item|
      case item
      when Hash
        create_segment_for_data(item[:data], item[:mode] || :auto)
      when String
        create_segment_for_data(item, mode)
      when Segment
        item
      else
        raise ArgumentError, "Array elements must be Strings, Hashes with :data key, or Segments"
      end
    end
  when Segment
    [data]
  else
    raise ArgumentError, "data must be a String, Segment, or Array"
  end
end

Instance Method Details

#bit_size(version) ⇒ Object 



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# File 'lib/qrcode/encoder/segment.rb', line 25

def bit_size(version)
  4 + header_size(version) + content_size
end

#content_size ⇒ Object 



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# File 'lib/qrcode/encoder/segment.rb', line 33

def content_size
  @data.bytesize * 8
end

#header_size(version) ⇒ Object 



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# File 'lib/qrcode/encoder/segment.rb', line 29

def header_size(version)
  Encoder::Util.get_length_in_bits(MODE[mode], version)
end

#mode ⇒ Object 



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# File 'lib/qrcode/encoder/segment.rb', line 21

def mode
  :mode_8bit_byte
end

#write(buffer) ⇒ Object 



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# File 'lib/qrcode/encoder/segment.rb', line 37

def write(buffer)
  buffer.byte_encoding_start(@data.bytesize)
  
  @data.each_byte do |b|
    buffer.put(b, 8)
  end
end