Provide enable/disable API.

lib/simple_form/components/errors.rb

@@ -4,7 +4,7 @@ module SimpleForm
       include SimpleForm::Helpers::HasErrors
 
       def error
-        template.content_tag(error_tag, error_text, error_html_options) if has_errors?
+        enabled_error
       end
 
       def error_tag
@@ -29,6 +29,14 @@ module SimpleForm
 
     protected
 
+      def enabled_error
+        template.content_tag(error_tag, error_text, error_html_options) if has_errors?
+      end
+
+      def disabled_error
+        nil
+      end
+
       def errors
         @errors ||= (errors_on_attribute + errors_on_association).compact
       end

lib/simple_form/components/hints.rb

@@ -2,9 +2,19 @@ module SimpleForm
   module Components
     module Hints
       def hint
+        enabled_hint
+      end
+
+      private
+
+      def enabled_hint
         template.content_tag(hint_tag, hint_text, hint_html_options) unless hint_text.blank?
       end
 
+      def disabled_hint
+        nil
+      end
+
       def hint_tag
         options[:hint_tag] || SimpleForm.hint_tag
       end

lib/simple_form/components/labels.rb

@@ -24,7 +24,7 @@ module SimpleForm
       end
 
       def label
-        @builder.label(label_target, label_text, label_html_options)
+        enabled_label
       end
 
       def label_text
@@ -43,6 +43,14 @@ module SimpleForm
 
     protected
 
+      def enabled_label
+        @builder.label(label_target, label_text, label_html_options)
+      end
+
+      def disabled_label
+        ""
+      end
+
       def raw_label_text #:nodoc:
         options[:label] || label_translation
       end

lib/simple_form/components/placeholders.rb

@@ -2,16 +2,20 @@ module SimpleForm
   module Components
     module Placeholders
       def placeholder
-        nil # This components is disabled by default.
+        disabled_placeholder
       end
 
       private
 
-      def active_placeholder
+      def enabled_placeholder
         input_html_options[:placeholder] ||= placeholder_text if placeholder_present?
         nil
       end
 
+      def disabled_placeholder
+        nil
+      end
+
       def placeholder_present?
         options[:placeholder] != false && placeholder_text.present?
       end

lib/simple_form/inputs/base.rb

@@ -22,7 +22,11 @@ module SimpleForm
 
       # Enables certain components support to the given input.
       def self.enable(*args)
-        args.each { |m| alias_method m, :"active_#{m}" }
+        args.each { |m| alias_method m, :"enabled_#{m}" }
+      end
+
+      def self.disable(*args)
+        args.each { |m| alias_method m, :"disabled_#{m}" }
       end
 
       attr_reader :attribute_name, :column, :input_type, :reflection,