Adding label class configuration option

lib/generators/simple_form/templates/simple_form.rb

@@ -52,6 +52,9 @@ SimpleForm.setup do |config|
   # How the label text should be generated altogether with the required text.
   # config.label_text = lambda { |label, required| "#{required} #{label}" }
 
+  # You can define the class to use on all labels. Default is nil.
+  # config.label_class = nil
+
   # Whether attributes are required by default (or not). Default is true.
   # config.required_by_default = true
 

lib/simple_form.rb

@@ -79,6 +79,10 @@ module SimpleForm
   mattr_accessor :label_text
   @@label_text = lambda { |label, required| "#{required} #{label}" }
 
+  # You can define the class to use on all labels. Default is nil.
+  mattr_accessor :label_class
+  @@label_class = nil
+
   # Whether attributes are required by default (or not).
   mattr_accessor :required_by_default
   @@required_by_default = true

lib/simple_form/components/labels.rb

@@ -36,7 +36,7 @@ module SimpleForm
       end
 
       def label_html_options
-        label_options = html_options_for(:label, [input_type, required_class])
+        label_options = html_options_for(:label, [input_type, required_class, SimpleForm.label_class])
         label_options[:for] = options[:input_html][:id] if options.key?(:input_html) && options[:input_html].key?(:id)
         label_options
       end