Add Oga SAX handler

.travis.yml

@@ -21,3 +21,4 @@ env:
   matrix:
     - HANDLER="nokogiri"
     - HANDLER="ox"
+    - HANDLER="oga"

Gemfile

@@ -11,4 +11,5 @@ group :development, :test do
   gem 'activerecord', '~> 4.1'
   gem 'nokogiri', '~> 1.6'
   gem 'ox', '>= 2.1.2', platforms: [:mri, :rbx]
+  gem 'oga', '>= 0.2.0'
 end

lib/sax-machine.rb

@@ -14,8 +14,16 @@ def self.handler=(handler)
   end
 end
 
-begin
-  SAXMachine.handler = :ox
-rescue LoadError
+# Try handlers
+[:ox, :oga].each do |handler|
+  begin
+    SAXMachine.handler = handler
+    break
+  rescue LoadError
+  end
+end
+
+# Still no handler, use Nokogiri
+if !SAXMachine.handler
   SAXMachine.handler = :nokogiri
 end

lib/sax-machine/handlers/sax_oga_handler.rb

@@ -0,0 +1,37 @@
+require 'sax-machine/handlers/sax_abstract_handler'
+require 'oga'
+
+module SAXMachine
+  class SAXOgaHandler
+    include SAXAbstractHandler
+
+    def initialize(*args)
+      _initialize(*args)
+    end
+
+    def sax_parse(xml_text)
+      Oga.sax_parse_xml(self, xml_text)
+    end
+
+    def on_element(namespace, name, attrs)
+      _start_element(node_name(namespace, name), attrs.map { |a| [a.name, a.value] })
+    end
+
+    def after_element(namespace, name)
+      _end_element(node_name(namespace, name))
+    end
+
+    def on_error(*args)
+      _error(args.join(" "))
+    end
+
+    alias_method :on_text, :_characters
+    alias_method :on_cdata, :_characters
+
+    private
+
+    def node_name(namespace, name)
+      namespace ? [namespace, name].join(":") : name
+    end
+  end
+end