Add Datamatrix

lib/zebra/zpl.rb

@@ -17,3 +17,4 @@
 require 'zebra/zpl/qrcode'
 require 'zebra/zpl/justification'
 require 'zebra/zpl/raw'
+require 'zebra/zpl/datamatrix'

lib/zebra/zpl/datamatrix.rb

@@ -0,0 +1,76 @@
+require "zebra/zpl/printable"
+
+module Zebra
+  module Zpl
+    class Datamatrix
+      include Printable
+
+      class InvalidOrientationError < StandardError; end
+      class InvalidQualityFactorError < StandardError; end
+      class InvalidSizeError < StandardError; end
+      class InvalidFormatError < StandardError; end
+      class InvalidRatioError < StandardError; end
+
+      attr_reader :symbol_height, :columns, :rows, :format, :aspect_ratio, :width
+      attr_accessor :escape_sequence
+
+      def width=(width)
+        @width = width || 0
+      end
+
+      def orientation=(value)
+        raise InvalidOrientationError unless %w[N R I B].include?(value)
+        @orientation = value
+      end
+
+      def orientation
+        @orientation || 'N'
+      end
+
+      def symbol_height=(height)
+        @symbol_height = height
+      end
+
+      def quality=(level)
+        raise InvalidQualityFactorError unless [0, 50, 80, 100, 140, 200].include?(level.to_i)
+        @quality = level
+      end
+
+      def quality
+        @quality || 200
+      end
+
+      def columns=(n)
+        raise InvalidSizeError unless (9..49).include?(n.to_i)
+        @columns = n
+      end
+
+      def rows=(n)
+        raise InvalidSizeError unless (9..49).include?(n.to_i)
+        @rows = n
+      end
+
+      def format=(value)
+        raise InvalidFormatError unless (0..6).include?(value.to_i)
+        @format = value
+      end
+
+      def aspect_ratio=(value)
+        raise InvalidRatioError unless [1, 2].include?(value.to_i)
+        @aspect_ratio = value
+      end
+
+      def to_zpl
+        check_attributes
+        "^FW#{rotation}^FO#{x},#{y}^BX#{orientation},#{symbol_height},#{quality},#{columns},#{rows},#{format},#{escape_sequence},#{aspect_ratio}^FD#{data}^FS"
+      end
+
+      private
+
+      def check_attributes
+        super
+        raise MissingAttributeError.new("the symbol height to be used is not given") unless @symbol_height
+      end
+    end
+  end
+end