From 18f181db479630679bcc414b8c290b40d8b26781 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafael=20Mendon=C3=A7a=20Fran=C3=A7a?=
 <rafaelmfranca@gmail.com>
Date: Mon, 16 Jan 2012 22:54:55 -0300
Subject: Extract Select

---
 .../lib/action_view/helpers/form_options_helper.rb | 19 +-------
 actionpack/lib/action_view/helpers/tags.rb         |  1 +
 actionpack/lib/action_view/helpers/tags/select.rb  | 57 ++++++++++++++++++++++
 3 files changed, 59 insertions(+), 18 deletions(-)
 create mode 100644 actionpack/lib/action_view/helpers/tags/select.rb

diff --git a/actionpack/lib/action_view/helpers/form_options_helper.rb b/actionpack/lib/action_view/helpers/form_options_helper.rb
index ba9ff1d5aa..8cce6d72cb 100644
--- a/actionpack/lib/action_view/helpers/form_options_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_options_helper.rb
@@ -154,7 +154,7 @@ module ActionView
       # key in the query string, that works for ordinary forms.
       #
       def select(object, method, choices, options = {}, html_options = {})
-        InstanceTag.new(object, method, self, options.delete(:object)).to_select_tag(choices, options, html_options)
+        ActionView::Helpers::Tags::Select.new(object, method, self, choices, options, html_options).render
       end
 
       # Returns <tt><select></tt> and <tt><option></tt> tags for the collection of existing return values of
@@ -576,23 +576,6 @@ module ActionView
     class InstanceTag #:nodoc:
       include FormOptionsHelper
 
-      def to_select_tag(choices, options, html_options)
-        selected_value = options.has_key?(:selected) ? options[:selected] : value(object)
-
-        # Grouped choices look like this:
-        #
-        #   [nil, []]
-        #   { nil => [] }
-        #
-        if !choices.empty? && choices.first.respond_to?(:last) && Array === choices.first.last
-          option_tags = grouped_options_for_select(choices, :selected => selected_value, :disabled => options[:disabled])
-        else
-          option_tags = options_for_select(choices, :selected => selected_value, :disabled => options[:disabled])
-        end
-
-        select_content_tag(option_tags, options, html_options)
-      end
-
       def to_collection_select_tag(collection, value_method, text_method, options, html_options)
         selected_value = options.has_key?(:selected) ? options[:selected] : value(object)
         select_content_tag(
diff --git a/actionpack/lib/action_view/helpers/tags.rb b/actionpack/lib/action_view/helpers/tags.rb
index 4dfd81841e..33e5425d48 100644
--- a/actionpack/lib/action_view/helpers/tags.rb
+++ b/actionpack/lib/action_view/helpers/tags.rb
@@ -16,6 +16,7 @@ module ActionView
       autoload :TextArea,      'action_view/helpers/tags/text_area'
       autoload :CheckBox,      'action_view/helpers/tags/check_box'
       autoload :RadioButton,   'action_view/helpers/tags/radio_button'
+      autoload :Select,        'action_view/helpers/tags/select'
     end
   end
 end
diff --git a/actionpack/lib/action_view/helpers/tags/select.rb b/actionpack/lib/action_view/helpers/tags/select.rb
new file mode 100644
index 0000000000..56d1dbfd38
--- /dev/null
+++ b/actionpack/lib/action_view/helpers/tags/select.rb
@@ -0,0 +1,57 @@
+module ActionView
+  module Helpers
+    module Tags
+      class Select < Base #:nodoc:
+        include FormOptionsHelper
+
+        def initialize(object_name, method_name, template_object, choices, options, html_options)
+          @choices = choices
+          @html_options = html_options
+
+          super(object_name, method_name, template_object, options)
+        end
+
+        def render
+          selected_value = @options.has_key?(:selected) ? @options[:selected] : value(@object)
+
+          # Grouped choices look like this:
+          #
+          #   [nil, []]
+          #   { nil => [] }
+          #
+          if !@choices.empty? && @choices.first.respond_to?(:last) && Array === @choices.first.last
+            option_tags = grouped_options_for_select(@choices, :selected => selected_value, :disabled => @options[:disabled])
+          else
+            option_tags = options_for_select(@choices, :selected => selected_value, :disabled => @options[:disabled])
+          end
+
+          select_content_tag(option_tags, @options, @html_options)
+        end
+
+        private
+
+        def select_content_tag(option_tags, options, html_options)
+          html_options = html_options.stringify_keys
+          add_default_name_and_id(html_options)
+          select = content_tag("select", add_options(option_tags, options, value(object)), html_options)
+          if html_options["multiple"]
+            tag("input", :disabled => html_options["disabled"], :name => html_options["name"], :type => "hidden", :value => "") + select
+          else
+            select
+          end
+        end
+
+        def add_options(option_tags, options, value = nil)
+          if options[:include_blank]
+            option_tags = "<option value=\"\">#{ERB::Util.html_escape(options[:include_blank]) if options[:include_blank].kind_of?(String)}</option>\n" + option_tags
+          end
+          if value.blank? && options[:prompt]
+            prompt = options[:prompt].kind_of?(String) ? options[:prompt] : I18n.translate('helpers.select.prompt', :default => 'Please select')
+            option_tags = "<option value=\"\">#{ERB::Util.html_escape(prompt)}</option>\n" + option_tags
+          end
+          option_tags.html_safe
+        end
+      end
+    end
+  end
+end
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