Class: Thermal::Escpos::Writer

Inherits:
WriterBase show all
Extended by:
Forwardable
Defined in:
lib/thermal/escpos/writer.rb

Direct Known Subclasses

Thermal::EscposStar::Writer

Constant Summary collapse

DEFAULT_QR_CODE_SIZE = 
400

Constants inherited from WriterBase

WriterBase::ALIGNMENTS

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from WriterBase

#align, #bold, #format, #initialize, #underline

Constructor Details

This class inherits a constructor from Thermal::WriterBase

Class Method Details

.format ⇒ Object 



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# File 'lib/thermal/escpos/writer.rb', line 15

def self.format
  'escpos'
end

Instance Method Details

#cut ⇒ Object 



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# File 'lib/thermal/escpos/writer.rb', line 45

def cut
  seq = supports?(:paper_partial_cut) ? ::Escpos::PAPER_PARTIAL_CUT : ::Escpos::PAPER_FULL_CUT
  sequence(seq)
end

#feed(lines = 1) ⇒ Object 



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# File 'lib/thermal/escpos/writer.rb', line 41

def feed(lines = 1)
  write("\n" * lines)
end

#hr(style = nil, width: col_width) ⇒ Object 



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# File 'lib/thermal/escpos/writer.rb', line 36

def hr(style = nil, width: col_width)
  write_text(hr_char(style) * width)
  feed
end

#image(path, opts = {}) ⇒ Object 



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# File 'lib/thermal/escpos/writer.rb', line 50

def image(path, opts = {})
  write(::Escpos::Image.new(path, opts).to_escpos)
end

#print(flush: true, output: nil) ⇒ Object 



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# File 'lib/thermal/escpos/writer.rb', line 19

def print(flush: true, output: nil)
  @buffer = nil
  super
  feed(5)
  cut
  if output == :byte_array
    flush ? buffer.flush : buffer.to_a
  else
    flush ? buffer.flush_base64 : buffer.to_base64
  end
end

#qr_code(url, size = DEFAULT_QR_CODE_SIZE) ⇒ Object 



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# File 'lib/thermal/escpos/writer.rb', line 54

def qr_code(url, size = DEFAULT_QR_CODE_SIZE)
  image(::RQRCode::QRCode.new(url).as_png(size: size))
end

#text(str, feed: true, replace: nil, no_cjk: false, **_kwargs) ⇒ Object 



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# File 'lib/thermal/escpos/writer.rb', line 31

def text(str, feed: true, replace: nil, no_cjk: false, **_kwargs)
  write_text(str, replace: replace, no_cjk: no_cjk)
  self.feed if feed
end