convert unicode to zawgyi for prawn documents - prawn text

config/initializers/prawn_text.rb

@@ -0,0 +1,28 @@
+require 'myanmar-tools'
+require 'rabbit'
+Prawn::Text.module_eval do
+
+  def text(string, options = {})
+    return false if string.nil?
+      detector = MyanmarTools::ZawgyiDetector.new
+      score    = detector.get_zawgyi_probability(string)
+      if score > 0 && score < 0.05
+        rabbit = Rabbit::Converter.new
+        string = rabbit.uni2zg(string)  # returns zg strings "မဂၤလာပါ"
+      end
+      # we modify the options. don't change the user's hash
+      options = options.dup
+
+      p = options[:inline_format]
+      if p
+        p = [] unless p.is_a?(Array)
+        options.delete(:inline_format)
+        array = text_formatter.format(string, *p)
+      else
+        array = [{ text: string }]
+      end
+
+      formatted_text(array, options)
+  end
+end
+