Add SimpleForm.translate to turn off translations for labels, hint and placeholders in cases you are not using them.

CHANGELOG.rdoc

@@ -8,6 +8,7 @@
   * Add :search and :tel input types, with :tel mapping automatically from attributes matching "phone" - HTML5
   * Add :required html attribute for required inputs - HTML5
   * Add optional :components option to input to control component rendering (by github.com/khoan)
+  * Add SimpleForm.translate as an easy way to turn off SimpleForm internal translations
 
 * bug fix
   * Search for validations on both association and attribute

lib/generators/simple_form/templates/simple_form.rb

@@ -1,6 +1,5 @@
 # Use this setup block to configure all options available in SimpleForm.
 SimpleForm.setup do |config|
-
   # Components used by the form builder to generate a complete input. You can remove
   # any of them, change the order, or even add your own components to the stack.
   # config.components = [ :label_input, :hint, :error ]
@@ -49,4 +48,7 @@ SimpleForm.setup do |config|
 
   # Default size for text inputs.
   # config.default_input_size = 50
+
+  # When true, do not use translations for labels, hints or placeholders.
+  # config.translate = true
 end

lib/simple_form.rb

@@ -74,6 +74,11 @@ module SimpleForm
   mattr_accessor :default_input_size
   @@default_input_size = 50
 
+  # When off, do not use translations in hint and labels.
+  # It is a small performance improvement if you are not such features.
+  mattr_accessor :translate
+  @@translate = true
+
   # Default way to setup SimpleForm. Run rails generate simple_form:install
   # to create a fresh initializer with all configuration values.
   def self.setup

lib/simple_form/components/labels.rb

@@ -54,13 +54,11 @@ module SimpleForm
 
       # First check human attribute name and then labels.
       def label_translation #:nodoc:
-        default = if object.class.respond_to?(:human_attribute_name)
+        translate(:labels) || if object.class.respond_to?(:human_attribute_name)
           object.class.human_attribute_name(reflection_or_attribute_name.to_s)
         else
           attribute_name.to_s.humanize
         end
-
-        translate(:labels, default)
       end
     end
   end

lib/simple_form/inputs/base.rb

@@ -121,19 +121,20 @@ module SimpleForm
       #
       #  Take a look at our locale example file.
       def translate(namespace, default='')
+        return nil unless SimpleForm.translate
         lookups = []
         lookups << :"#{object_name}.#{lookup_action}.#{reflection_or_attribute_name}"
         lookups << :"#{object_name}.#{reflection_or_attribute_name}"
         lookups << :"#{reflection_or_attribute_name}"
         lookups << default
-        I18n.t(lookups.shift, :scope => :"simple_form.#{namespace}", :default => lookups)
+        I18n.t(lookups.shift, :scope => :"simple_form.#{namespace}", :default => lookups).presence
       end
 
       # The action to be used in lookup.
       def lookup_action
-        return unless template.controller.action_name
-
-        action = template.controller.action_name.to_sym
+        action = template.controller.action_name
+        return unless action
+        action = action.to_sym
         ACTIONS[action] || action
       end
     end

test/components/label_test.rb

@@ -83,6 +83,15 @@ class LabelTest < ActionView::TestCase
     end
   end
 
+  test 'input should not use i18n label if translate is false' do
+    swap SimpleForm, :translate => false do
+      store_translations(:en, :simple_form => { :labels => { :age => 'Idade' } } ) do
+        with_label_for @user, :age, :integer
+        assert_select 'label[for=user_age]', /Age/
+      end
+    end
+  end
+
   test 'label should use i18n with lookup for association name' do
     store_translations(:en, :simple_form => { :labels => {
       :user => { :company => 'My company!' }