import from http://github.com/ihower/country_select/

README.md

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+# Country and region select
+
+Provides a simple helper to get an HTML select list of countries and regions. 
+The list of countries comes from [iso-codes package]( http://svn.debian.org/wsvn/pkg-isocodes/trunk/iso-codes/iso_3166/iso_3166.xml?op=file&rev=0&sc=0)
+
+This plugin is modified from official Rails [Country select plugin](http://github.com/rails/country_select/tree/master) ([why?](http://hlb.yichi.org/blog/2008/09/22/258))
+and licensed under the MIT: http://www.opensource.org/licenses/mit-license.php
+
+## Example
+
+country_select("user", "country_name")

init.rb

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+require 'country_select'

lib/country_select.rb

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+# CountrySelect
+module ActionView
+  module Helpers
+    module FormOptionsHelper
+      # Return select and option tags for the given object and method, using country_options_for_select to generate the list of option tags.
+      def country_select(object, method, priority_countries = nil, options = {}, html_options = {})
+        InstanceTag.new(object, method, self, nil, options.delete(:object)).to_country_select_tag(priority_countries, options, html_options)
+      end
+      # Returns a string of option tags for pretty much any country in the world. Supply a country name as +selected+ to
+      # have it marked as the selected option tag. You can also supply an array of countries as +priority_countries+, so
+      # that they will be listed above the rest of the (long) list.
+      #
+      # NOTE: Only the option tags are returned, you have to wrap this call in a regular HTML select tag.
+      def country_options_for_select(selected = nil, priority_countries = nil)
+        country_options = ""
+
+        if priority_countries
+          country_options += options_for_select(priority_countries, selected)
+          country_options += "<option value=\"\" disabled=\"disabled\">-------------</option>\n"
+        end
+
+        return country_options + options_for_select(COUNTRIES, selected)
+      end
+      # All the countries included in the country_options output.
+      COUNTRIES = ["Afghanistan","Åland Islands","Albania","Algeria","American Samoa","Andorra","Angola",
+        "Anguilla","Antarctica","Antigua and Barbuda","Argentina","Armenia","Aruba","Australia","Austria",
+        "Azerbaijan","Bahamas","Bahrain","Bangladesh","Barbados","Belarus","Belgium","Belize","Benin",
+        "Bermuda","Bhutan","Bolivia","Bosnia and Herzegovina","Botswana","Bouvet Island","Brazil",
+        "British Indian Ocean Territory","Brunei Darussalam","Bulgaria","Burkina Faso","Burundi","Cambodia",
+        "Cameroon","Canada","Cape Verde","Cayman Islands","Central African Republic","Chad","Chile","China",
+        "Christmas Island","Cocos (Keeling) Islands","Colombia","Comoros","Congo",
+        "Congo, The Democratic Republic of the","Cook Islands","Costa Rica","Côte d'Ivoire","Croatia","Cuba",
+        "Cyprus","Czech Republic","Denmark","Djibouti","Dominica","Dominican Republic","Ecuador","Egypt",
+        "El Salvador","Equatorial Guinea","Eritrea","Estonia","Ethiopia","Falkland Islands (Malvinas)",
+        "Faroe Islands","Fiji","Finland","France","French Guiana","French Polynesia",
+        "French Southern Territories","Gabon","Gambia","Georgia","Germany","Ghana","Gibraltar","Greece","Greenland","Grenada","Guadeloupe","Guam","Guatemala","Guernsey","Guinea",
+        "Guinea-Bissau","Guyana","Haiti","Heard Island and McDonald Islands","Holy See (Vatican City State)",
+        "Honduras","Hong Kong","Hungary","Iceland","India","Indonesia","Iran, Islamic Republic of","Iraq",
+        "Ireland","Isle of Man","Israel","Italy","Jamaica","Japan","Jersey","Jordan","Kazakhstan","Kenya",
+        "Kiribati","Korea, Democratic People's Republic of","Korea, Republic of","Kuwait","Kyrgyzstan",
+        "Lao People's Democratic Republic","Latvia","Lebanon","Lesotho","Liberia","Libyan Arab Jamahiriya",
+        "Liechtenstein","Lithuania","Luxembourg","Macao","Macedonia, Republic of",
+        "Madagascar","Malawi","Malaysia","Maldives","Mali","Malta","Marshall Islands","Martinique",
+        "Mauritania","Mauritius","Mayotte","Mexico","Micronesia, Federated States of","Moldova",
+        "Monaco","Mongolia","Montenegro","Montserrat","Morocco","Mozambique","Myanmar","Namibia","Nauru",
+        "Nepal","Netherlands","Netherlands Antilles","New Caledonia","New Zealand","Nicaragua","Niger",
+        "Nigeria","Niue","Norfolk Island","Northern Mariana Islands","Norway","Oman","Pakistan","Palau",
+        "Palestinian Territory, Occupied","Panama","Papua New Guinea","Paraguay","Peru","Philippines",
+        "Pitcairn","Poland","Portugal","Puerto Rico","Qatar","Reunion","Romania","Russian Federation",
+        "Rwanda","Saint Barthélemy","Saint Helena","Saint Kitts and Nevis","Saint Lucia",
+        "Saint Martin (French part)","Saint Pierre and Miquelon","Saint Vincent and the Grenadines","Samoa","San Marino",
+        "Sao Tome and Principe","Saudi Arabia","Senegal","Serbia","Seychelles","Sierra Leone","Singapore",
+        "Slovakia","Slovenia","Solomon Islands","Somalia","South Africa",
+        "South Georgia and the South Sandwich Islands","Spain","Sri Lanka","Sudan","Suriname",
+        "Svalbard and Jan Mayen","Swaziland","Sweden","Switzerland","Syrian Arab Republic",
+        "Taiwan","Tajikistan","Tanzania, United Republic of","Thailand","Timor-Leste",
+        "Togo","Tokelau","Tonga","Trinidad and Tobago","Tunisia","Turkey","Turkmenistan",
+        "Turks and Caicos Islands","Tuvalu","Uganda","Ukraine","United Arab Emirates","United Kingdom",
+        "United States","United States Minor Outlying Islands","Uruguay","Uzbekistan","Vanuatu","Venezuela",
+        "Viet Nam","Virgin Islands, British","Virgin Islands, U.S.","Wallis and Futuna","Western Sahara",
+        "Yemen","Zambia","Zimbabwe"] unless const_defined?("COUNTRIES") && Rails::VERSION::STRING >= '2.2.0'
+    end
+
+    class InstanceTag
+      def to_country_select_tag(priority_countries, options, html_options)
+        html_options = html_options.stringify_keys
+        add_default_name_and_id(html_options)
+        value = value(object)
+        content_tag("select",
+          add_options(
+            country_options_for_select(value, priority_countries),
+            options, value
+          ), html_options
+        )
+      end
+    end
+
+    class FormBuilder
+      def country_select(method, priority_countries = nil, options = {}, html_options = {})
+        @template.country_select(@object_name, method, priority_countries, options.merge(:object => @object), html_options)
+      end
+    end
+  end
+end