Add rudimentary support to wrapper_tag.

lib/simple_form.rb

@@ -26,4 +26,8 @@ module SimpleForm
   # Series of attemps to detect a default value method for collection
   mattr_accessor :collection_value_methods
   @@collection_value_methods = [ :id, :to_s ]
+
+  # You can wrap all inputs in a pre-defined tag. By default is nil.
+  mattr_accessor :wrapper_tag
+  @@wrapper_tag = nil
 end

lib/simple_form/form_builder.rb

@@ -11,11 +11,19 @@ module SimpleForm
         klass.new(self, attribute, input_type, options).generate
       end
 
-      pieces.compact.join
+      wrap_content(pieces.compact.join)
     end
 
   private
 
+    def wrap_content(content)
+      if SimpleForm.wrapper_tag
+        @template.content_tag(SimpleForm.wrapper_tag, content)
+      else
+        content
+      end
+    end
+
     def default_input_type(attribute, options)
       return options[:as].to_sym if options[:as]
       return :select             if options[:collection]

test/form_builder_test.rb

@@ -128,4 +128,13 @@ class FormBuilderTest < ActionView::TestCase
     with_form_for :name, :error => false
     assert_no_select 'span.error'
   end
+
+  test 'builder support wrapping around an specific tag' do
+    swap SimpleForm, :wrapper_tag => :p do
+      with_form_for :name
+      assert_select 'form p label[for=user_name]'
+      assert_select 'form p input#user_name.string'
+    end
+  end
+  
 end