From 1525f3816e9b51d93d2e1356d1b90ba49213d325 Mon Sep 17 00:00:00 2001
From: Tekin Suleyman <tekin@tekin.co.uk>
Date: Sat, 14 Feb 2009 00:37:24 +0000
Subject: Enhanced form option helpers to add support for disabled option tags
 and use of anonymous functions for specifying selected and disabled values
 from collections.

Signed-off-by: Michael Koziarski <michael@koziarski.com>
---
 .../lib/action_view/helpers/form_options_helper.rb | 35 +++++++++++++++++++---
 1 file changed, 31 insertions(+), 4 deletions(-)

(limited to 'actionpack/lib/action_view/helpers/form_options_helper.rb')

diff --git a/actionpack/lib/action_view/helpers/form_options_helper.rb b/actionpack/lib/action_view/helpers/form_options_helper.rb
index 54c82cbd1d..40b9b0d135 100644
--- a/actionpack/lib/action_view/helpers/form_options_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_options_helper.rb
@@ -189,11 +189,13 @@ module ActionView
       # NOTE: Only the option tags are returned, you have to wrap this call in a regular HTML select tag.
       def options_for_select(container, selected = nil)
         container = container.to_a if Hash === container
+        selected, disabled = extract_selected_and_disabled(selected)
 
         options_for_select = container.inject([]) do |options, element|
           text, value = option_text_and_value(element)
           selected_attribute = ' selected="selected"' if option_value_selected?(value, selected)
-          options << %(<option value="#{html_escape(value.to_s)}"#{selected_attribute}>#{html_escape(text.to_s)}</option>)
+          disabled_attribute = ' disabled="disabled"' if disabled && option_value_selected?(value, disabled)
+          options << %(<option value="#{html_escape(value.to_s)}"#{selected_attribute}#{disabled_attribute}>#{html_escape(text.to_s)}</option>)
         end
 
         options_for_select.join("\n")
@@ -220,7 +222,12 @@ module ActionView
         options = collection.map do |element|
           [element.send(text_method), element.send(value_method)]
         end
-        options_for_select(options, selected)
+        selected, disabled = extract_selected_and_disabled(selected)
+        select_deselect = {}
+        select_deselect[:selected] = extract_values_from_collection(collection, value_method, selected)
+        select_deselect[:disabled] = extract_values_from_collection(collection, value_method, disabled)
+
+        options_for_select(options, select_deselect)
       end
 
       # Returns a string of <tt><option></tt> tags, like <tt>options_from_collection_for_select</tt>, but
@@ -388,6 +395,24 @@ module ActionView
             value == selected
           end
         end
+
+        def extract_selected_and_disabled(selected)
+          if selected.is_a?(Hash)
+            [selected[:selected], selected[:disabled]]
+          else
+            [selected, nil]
+          end
+        end
+
+        def extract_values_from_collection(collection, value_method, selected)
+          if selected.is_a?(Proc)
+            collection.map do |element|
+              element.send(value_method) if selected.call(element)
+            end.compact
+          else
+            selected
+          end
+        end
     end
 
     class InstanceTag #:nodoc:
@@ -398,16 +423,18 @@ module ActionView
         add_default_name_and_id(html_options)
         value = value(object)
         selected_value = options.has_key?(:selected) ? options[:selected] : value
-        content_tag("select", add_options(options_for_select(choices, selected_value), options, selected_value), html_options)
+        disabled_value = options.has_key?(:disabled) ? options[:disabled] : nil
+        content_tag("select", add_options(options_for_select(choices, :selected => selected_value, :disabled => disabled_value), options, selected_value), html_options)
       end
 
       def to_collection_select_tag(collection, value_method, text_method, options, html_options)
         html_options = html_options.stringify_keys
         add_default_name_and_id(html_options)
         value = value(object)
+        disabled_value = options.has_key?(:disabled) ? options[:disabled] : nil
         selected_value = options.has_key?(:selected) ? options[:selected] : value
         content_tag(
-          "select", add_options(options_from_collection_for_select(collection, value_method, text_method, selected_value), options, value), html_options
+          "select", add_options(options_from_collection_for_select(collection, value_method, text_method, :selected => selected_value, :disabled => disabled_value), options, value), html_options
         )
       end
 
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