refactored the javascript asset tag helpers and moved the default scripts setup within the railtie

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

actionpack/lib/action_view/helpers/asset_tag_helper.rb

@@ -194,7 +194,6 @@ module Helpers #:nodoc:
     #   RewriteEngine On
     #   RewriteRule ^/release-\d+/(images|javascripts|stylesheets)/(.*)$ /$1/$2 [L]
     module AssetTagHelper
-      JAVASCRIPT_DEFAULT_SOURCES = ['prototype', 'effects', 'dragdrop', 'controls', 'rails'].freeze
 
       # Returns a link tag that browsers and news readers can use to auto-detect
       # an RSS or ATOM feed. The +type+ can either be <tt>:rss</tt> (default) or
@@ -351,7 +350,7 @@ def javascript_include_tag(*sources)
         end
       end
 
-      @@javascript_expansions = { :defaults => JAVASCRIPT_DEFAULT_SOURCES.dup }
+      @@javascript_expansions = { }
 
       # Register one or more javascript files to be included when <tt>symbol</tt>
       # is passed to <tt>javascript_include_tag</tt>. This method is typically intended
@@ -368,6 +367,10 @@ def self.register_javascript_expansion(expansions)
         @@javascript_expansions.merge!(expansions)
       end
 
+      def self.reset_javascript_expansions #:nodoc:
+        @@javascript_expansions = {}
+      end
+
       @@stylesheet_expansions = {}
 
       # Register one or more stylesheet files to be included when <tt>symbol</tt>
@@ -385,18 +388,6 @@ def self.register_stylesheet_expansion(expansions)
         @@stylesheet_expansions.merge!(expansions)
       end
 
-      # Register one or more additional JavaScript files to be included when
-      # <tt>javascript_include_tag :defaults</tt> is called. This method is
-      # typically intended to be called from plugin initialization to register additional
-      # .js files that the plugin installed in <tt>public/javascripts</tt>.
-      def self.register_javascript_include_default(*sources)
-        @@javascript_expansions[:defaults].concat(sources)
-      end
-
-      def self.reset_javascript_include_default #:nodoc:
-        @@javascript_expansions[:defaults] = JAVASCRIPT_DEFAULT_SOURCES.dup
-      end
-
       # Computes the path to a stylesheet asset in the public stylesheets directory.
       # If the +source+ filename has no extension, <tt>.css</tt> will be appended (except for explicit URIs).
       # Full paths from the document root will be passed through.

actionpack/lib/action_view/railtie.rb

@@ -6,6 +6,9 @@ module ActionView
   class Railtie < Rails::Railtie
     config.action_view = ActiveSupport::OrderedOptions.new
 
+    # setup default js includes
+    config.action_view.javascript_expansions = { :defaults => ['prototype', 'effects', 'dragdrop', 'controls', 'rails'] }
+
     require "action_view/railties/log_subscriber"
     log_subscriber :action_view, ActionView::Railties::LogSubscriber.new
 
@@ -17,6 +20,12 @@ class Railtie < Rails::Railtie
       end
     end
 
+    initializer "action_view.javascript_expansions" do |app|
+      ActiveSupport.on_load(:action_view) do
+        ActionView::Helpers::AssetTagHelper.register_javascript_expansion(app.config.action_view.javascript_expansions)
+      end
+    end
+
     initializer "action_view.set_configs" do |app|
       ActiveSupport.on_load(:action_view) do
         app.config.action_view.each do |k,v|

actionpack/test/template/asset_tag_helper_test.rb

@@ -44,7 +44,7 @@ def host_with_port() 'localhost' end
 
     @controller.request = @request
 
-    ActionView::Helpers::AssetTagHelper::reset_javascript_include_default
+    ActionView::Helpers::AssetTagHelper::register_javascript_expansion :defaults => ['prototype', 'effects', 'dragdrop', 'controls', 'rails']
   end
 
   def url_for(*args)
@@ -256,19 +256,6 @@ def test_javascript_include_tag_is_html_safe
     assert javascript_include_tag("prototype").html_safe?
   end
 
-  def test_register_javascript_include_default
-    ENV["RAILS_ASSET_ID"] = ""
-    ActionView::Helpers::AssetTagHelper::register_javascript_include_default 'bank'
-    assert_dom_equal  %(<script src="/javascripts/prototype.js" type="text/javascript"></script>\n<script src="/javascripts/effects.js" type="text/javascript"></script>\n<script src="/javascripts/dragdrop.js" type="text/javascript"></script>\n<script src="/javascripts/controls.js" type="text/javascript"></script>\n<script src="/javascripts/rails.js" type="text/javascript"></script>\n<script src="/javascripts/bank.js" type="text/javascript"></script>\n<script src="/javascripts/application.js" type="text/javascript"></script>), javascript_include_tag(:defaults)
-  end
-
-  def test_register_javascript_include_default_mixed_defaults
-    ENV["RAILS_ASSET_ID"] = ""
-    ActionView::Helpers::AssetTagHelper::register_javascript_include_default 'bank'
-    ActionView::Helpers::AssetTagHelper::register_javascript_include_default 'robber', '/elsewhere/cools.js'
-    assert_dom_equal  %(<script src="/javascripts/prototype.js" type="text/javascript"></script>\n<script src="/javascripts/effects.js" type="text/javascript"></script>\n<script src="/javascripts/dragdrop.js" type="text/javascript"></script>\n<script src="/javascripts/controls.js" type="text/javascript"></script>\n<script src="/javascripts/rails.js" type="text/javascript"></script>\n<script src="/javascripts/bank.js" type="text/javascript"></script>\n<script src="/javascripts/robber.js" type="text/javascript"></script>\n<script src="/elsewhere/cools.js" type="text/javascript"></script>\n<script src="/javascripts/application.js" type="text/javascript"></script>), javascript_include_tag(:defaults)
-  end
-
   def test_custom_javascript_expansions
     ENV["RAILS_ASSET_ID"] = ""
     ActionView::Helpers::AssetTagHelper::register_javascript_expansion :robbery => ["bank", "robber"]
@@ -286,6 +273,11 @@ def test_custom_javascript_expansions_with_undefined_symbol
     assert_raise(ArgumentError) { javascript_include_tag('first', :monkey, 'last') }
   end
 
+  def test_reset_javascript_expansions
+    ActionView::Helpers::AssetTagHelper::reset_javascript_expansions
+    assert_raise(ArgumentError) { javascript_include_tag(:defaults) }
+  end
+
   def test_stylesheet_path
     ENV["RAILS_ASSET_ID"] = ""
     StylePathToTag.each { |method, tag| assert_dom_equal(tag, eval(method)) }
@@ -923,7 +915,7 @@ def setup
     @request = Struct.new(:protocol).new("gopher://")
     @controller.request = @request
 
-    ActionView::Helpers::AssetTagHelper::reset_javascript_include_default
+    ActionView::Helpers::AssetTagHelper::reset_javascript_expansions
   end
 
   def url_for(options)