Class: ActionView::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/barcoder.rb

Constant Summary collapse

VALID_BARCODER_OPTIONS =

important defaults, should not be messed with.

[:encoding_format, :output_format, :width, :height, :scaling_factor, :xoff, :yoff, :margin, :output_type]
DEFAULT_BARCODER_OUTPUT_FORMAT = 
'gif'
DEFAULT_BARCODER_ENCODING = 
Gbarcode::BARCODE_39 | Gbarcode::BARCODE_NO_CHECKSUM
BARCODE_STORAGE_PATH = 
"public/images/barcodes"

Instance Method Summary collapse

Instance Method Details

#barcode(str, options = {:encoding_format => DEFAULT_BARCODER_ENCODING }) ⇒ Object

support for the original barcode-generator plugin syntax.



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# File 'lib/barcoder.rb', line 54

def barcode(str, options = {:encoding_format => DEFAULT_BARCODER_ENCODING })
  to_barcode(str, options)
end

#to_barcode(str, options = {:encoding_format => DEFAULT_BARCODER_ENCODING }) ⇒ Object 



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# File 'lib/barcoder.rb', line 21

def to_barcode(str, options = {:encoding_format => DEFAULT_BARCODER_ENCODING })
  # verify requirements
  options.assert_valid_keys(VALID_BARCODER_OPTIONS)
  output_format = options[:output_format] ? options[:output_format] : DEFAULT_BARCODER_OUTPUT_FORMAT
  output_type = options[:output_type] ? options[:output_type] : :stream
  # generate the barcode object with all supplied options
  options[:encoding_format] = DEFAULT_BARCODER_ENCODING unless options[:encoding_format]
  bc = Gbarcode.barcode_create(str.to_s)
  
  bc.width  = options[:width]          if options[:width]
  bc.height = options[:height]         if options[:height]
  bc.scalef = options[:scaling_factor] if options[:scaling_factor]
  bc.xoff   = options[:xoff]           if options[:xoff]
  bc.yoff   = options[:yoff]           if options[:yoff]
  bc.margin = options[:margin]         if options[:margin]
  
  Gbarcode.barcode_encode(bc, options[:encoding_format])
  
  if options[:no_ascii]
    print_options = Gbarcode::BARCODE_OUT_EPS|Gbarcode::BARCODE_NO_ASCII
  else
    print_options = Gbarcode::BARCODE_OUT_EPS
  end
  
  # this is where the magic happens.
  data = `echo "#{get_bytes_from_barcode(bc, print_options)}" | convert eps: #{output_format}:`
  
  # simple output strategy, define :output_type => :disk in the #to_barcode call if you want
  # it to write out to the disk for you, otherwise it will be a data url stream.
  output_type == :disk ? barcode_to_disk(data, bc, output_format) : barcode_to_stream(data, output_format, str)
end