New features

.rvmrc

@@ -0,0 +1 @@
+rvm use 2.0.0@rails_locale_detection --create

Gemfile

@@ -1,15 +1,2 @@
-source "http://rubygems.org"
-
-gem 'activesupport', '~> 3.2.13'
-gem 'http_accept_language'
-
-# Add dependencies to develop your gem here.
-# Include everything needed to run rake, tests, features, etc.
-group :development do
-  gem 'i18n'
-  gem 'timecop'
-  gem 'actionpack', '~> 3.2.13'
-  gem "rspec", "~> 2.12.0"
-  gem "bundler", "~> 1.3.4"
-  gem "jeweler", "~> 1.8.4"
-end
+source "https://rubygems.org"
+gemspec

Gemfile.lock

@@ -1,6 +1,17 @@
+PATH
+  remote: .
+  specs:
+    rails_locale_detection (1.3.2)
+      http_accept_language
+      i18n
+      rails (~> 3.2.13)
+
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
+    actionmailer (3.2.13)
+      actionpack (= 3.2.13)
+      mail (~> 2.5.3)
     actionpack (3.2.13)
       activemodel (= 3.2.13)
       activesupport (= 3.2.13)
@@ -14,9 +25,18 @@ GEM
     activemodel (3.2.13)
       activesupport (= 3.2.13)
       builder (~> 3.0.0)
+    activerecord (3.2.13)
+      activemodel (= 3.2.13)
+      activesupport (= 3.2.13)
+      arel (~> 3.0.2)
+      tzinfo (~> 0.3.29)
+    activeresource (3.2.13)
+      activemodel (= 3.2.13)
+      activesupport (= 3.2.13)
     activesupport (3.2.13)
       i18n (= 0.6.1)
       multi_json (~> 1.0)
+    arel (3.0.2)
     builder (3.0.4)
     diff-lcs (1.1.3)
     erubis (2.7.0)
@@ -31,14 +51,37 @@ GEM
       rdoc
     journey (1.0.4)
     json (1.7.7)
-    multi_json (1.7.1)
+    mail (2.5.3)
+      i18n (>= 0.4.0)
+      mime-types (~> 1.16)
+      treetop (~> 1.4.8)
+    mime-types (1.21)
+    multi_json (1.7.2)
+    polyglot (0.3.3)
     rack (1.4.5)
     rack-cache (1.2)
       rack (>= 0.4)
+    rack-ssl (1.3.3)
+      rack
     rack-test (0.6.2)
       rack (>= 1.0)
-    rake (10.0.3)
-    rdoc (4.0.0)
+    rails (3.2.13)
+      actionmailer (= 3.2.13)
+      actionpack (= 3.2.13)
+      activerecord (= 3.2.13)
+      activeresource (= 3.2.13)
+      activesupport (= 3.2.13)
+      bundler (~> 1.0)
+      railties (= 3.2.13)
+    railties (3.2.13)
+      actionpack (= 3.2.13)
+      activesupport (= 3.2.13)
+      rack-ssl (~> 1.3.2)
+      rake (>= 0.8.7)
+      rdoc (~> 3.4)
+      thor (>= 0.14.6, < 2.0)
+    rake (10.0.4)
+    rdoc (3.12.2)
       json (~> 1.4)
     rspec (2.12.0)
       rspec-core (~> 2.12.0)
@@ -53,18 +96,20 @@ GEM
       multi_json (~> 1.0)
       rack (~> 1.0)
       tilt (~> 1.1, != 1.3.0)
+    thor (0.18.0)
     tilt (1.3.6)
     timecop (0.6.1)
+    treetop (1.4.12)
+      polyglot
+      polyglot (>= 0.3.1)
+    tzinfo (0.3.37)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  actionpack (~> 3.2.13)
-  activesupport (~> 3.2.13)
   bundler (~> 1.3.4)
-  http_accept_language
-  i18n
   jeweler (~> 1.8.4)
+  rails_locale_detection!
   rspec (~> 2.12.0)
   timecop

README.md

@@ -3,29 +3,22 @@
 [![Build Status](https://travis-ci.org/mateomurphy/rails_locale_detection.png?branch=master)](https://travis-ci.org/mateomurphy/rails_locale_detection)
 [![Dependency Status](https://gemnasium.com/mateomurphy/rails_locale_detection.png)](https://gemnasium.com/mateomurphy/rails_locale_detection)
 
-Sets the current locale of a request using a combination of params, cookies, http headers, and an optional user object. 
+Sets the current locale of a request using a combination of params, cookies, http headers, and an optional user object.
 
 In turn, it checks the value of params[:locale], cookies[:locale] and HTTP_ACCEPT_LANGUAGE headers to find a locale that
 corresponds to the available locales, then stores the set locale in a cookie for future requests. If a user_locale method
 is provided, the return value will be used, with preference over the other locale detection methods.
 
 ## Usage
 
-Include the gem in your Gemfile 
+Include the gem in your Gemfile
 
     gem 'rails_locale_detection'
-  
+
 Set your default and available locales
 
     I18n.default_locale = :en
     I18n.available_locales = [:en, :fr]
-
-Call `set_locale` as a filter in your controllers
-
-    class ApplicationController < ActionController::Base
-      before_filter :set_locale
-
-    end
 
 To support user locales, add a `user_locale` method
 
@@ -35,7 +28,7 @@ To support user locales, add a `user_locale` method
       def user_locale
         current_user.locale if current_user
       end
-    
+
     end
 
 
@@ -44,9 +37,9 @@ To support user locales, add a `user_locale` method
 Configuration is done via a block that can be added as an initializer:
 
     Rails::LocaleDetection.config do |config|
-      config.locale_expiry = 3.months 
+      config.locale_expiry = 3.months
       config.set_default_url_option = :always # valid values are true, false, :always, :never and :explicity
-      config.detection_order = [:user, :param, :cookie, :request] 
+      config.detection_order = [:user, :param, :cookie, :request]
     end
 
 The configuration options:
@@ -59,7 +52,7 @@ The configuration options:
 * `detection_order` set the order in which locale detection occurs. Omit values to skip those sources
 
 ## Contributing to rails_locale_detection
- 
+
 * Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet
 * Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it
 * Fork the project

lib/rails/locale_detection/filter.rb

@@ -0,0 +1,71 @@
+module Rails
+  module LocaleDetection
+    module Filter
+      extend ActiveSupport::Concern
+
+      included do
+        append_before_filter :set_locale
+      end
+
+      def available_locales
+        I18n.available_locales
+      end
+
+      def default_locale
+        I18n.default_locale
+      end
+
+      def current_locale
+        I18n.locale
+      end
+
+      def user_locale
+        nil
+      end
+
+      # returns the (symbolized) value passed if it's in the available_locales
+      def validate_locale(locale)
+        locale.to_sym if locale && available_locales.include?(locale.to_sym)
+      end
+
+      def locale_from_param
+        validate_locale(params[:locale])
+      end
+
+      def locale_from_cookie
+        validate_locale(cookies[:locale])
+      end
+
+      def locale_from_request
+        validate_locale(request.preferred_language_from(available_locales))
+      end
+
+      def locale_from_user
+        validate_locale(user_locale)
+      end
+
+      def locale_from(key)
+        send("locale_from_#{key}")
+      end
+
+      def get_locale
+        Rails::LocaleDetection.detection_order.inject(nil) { |result, source| result || locale_from(source) } || default_locale
+      end
+
+      # set I18n.locale, default_url_options[:locale] and cookies[:locale] to the value returned by
+      # get_locale
+      def set_locale
+        I18n.locale = get_locale
+        default_url_options[:locale] = I18n.locale if set_default_url_option_for_request?
+        cookies[:locale] = { :value => I18n.locale, :expires => Rails::LocaleDetection.locale_expiry.from_now }
+      end
+
+      protected
+
+      # returns true if the default url option should be set for this request
+      def set_default_url_option_for_request?
+        Rails::LocaleDetection.set_default_url_option === true || Rails::LocaleDetection.set_default_url_option == :always || Rails::LocaleDetection.set_default_url_option == :explicitly && params[:locale].present?
+      end
+    end
+  end
+end

lib/rails/locale_detection/internationalization_helper.rb

@@ -0,0 +1,38 @@
+module Rails
+  module LocaleDetection
+    module InternationalizationHelper
+
+      def current_locale
+        I18n.locale
+      end
+
+      def available_locales
+        I18n.available_locales
+      end
+
+      def link_to_locale html_options={}
+        if available_locales.length == 2
+          link_to_locale_single html_options
+        else
+          link_to_locale_list html_options
+        end
+      end
+
+      protected
+
+      def link_to_locale_list html_options
+        content_tag :ul, html_options do
+          available_locales.each do |lang|
+            concat(content_tag(:li, link_to(t('locale_name', locale: lang), url_for(params.merge(locale: lang)))))
+          end
+        end
+      end
+
+      def link_to_locale_single html_options
+        lang = (available_locales - [current_locale]).first
+        link_to t('locale_name', locale: lang), url_for(params.merge(locale: lang)), html_options
+      end
+
+    end
+  end
+end

lib/rails/locale_detection/railtie.rb

@@ -0,0 +1,14 @@
+module Rails
+  module LocaleDetection
+    class Railtie < Rails::Railtie
+      initializer "rails_locale_detection.append_before_filter" do
+        ActiveSupport.on_load(:action_controller) do
+          ActionController::Base.send :include, Rails::LocaleDetection::Filter
+        end
+        ActiveSupport.on_load(:action_view) do
+          ActionView::Base.send :include, Rails::LocaleDetection::InternationalizationHelper
+        end
+      end
+    end
+  end
+end