Extract RadioButton

1 files changed, 35 insertions, 0 deletions

diff --git a/actionpack/lib/action_view/helpers/tags/radio_button.rb b/actionpack/lib/action_view/helpers/tags/radio_button.rb
new file mode 100644
index 0000000000..3f6a360928
--- /dev/null
+++ b/actionpack/lib/action_view/helpers/tags/radio_button.rb
@@ -0,0 +1,35 @@
+module ActionView
+  module Helpers
+    module Tags
+      class RadioButton < Base #:nodoc:
+        def initialize(object_name, method_name, template_object, tag_value, options)
+          @tag_value = tag_value
+          super(object_name, method_name, template_object, options)
+        end
+
+        def render
+          options = @options.stringify_keys
+          options["type"]     = "radio"
+          options["value"]    = @tag_value
+
+          if options.has_key?("checked")
+            cv = options.delete "checked"
+            checked = cv == true || cv == "checked"
+          else
+            checked = radio_button_checked?(value(object))
+          end
+
+          options["checked"]  = "checked" if checked
+          add_default_name_and_id_for_value(@tag_value, options)
+          tag("input", options)
+        end
+
+        private
+
+        def radio_button_checked?(value)
+          value.to_s == @tag_value.to_s
+        end
+      end
+    end
+  end
+end