Added delayed execution of Javascript from within RJS (closes #3264) [devslashnull@gmail.com]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3335 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/lib/action_view/helpers/prototype_helper.rb

@@ -485,10 +485,21 @@ module ActionView
         def <<(javascript)
           @lines << javascript
         end
-        
+
+        # Executes the content of the block after a delay of +seconds+. Example:
+        #
+        #   page.delay(20) do
+        #     page.visual_effect :fade, 'notice'
+        #   end
+        def delay(seconds = 1)
+          record "setTimeout(function() {\n\n"
+          yield
+          record "}, #{(seconds * 1000).to_i})"
+        end
+
       private
         def method_missing(method, *arguments, &block)
-          record @context.send(method, *arguments, &block)
+          record(@context.send(method, *arguments, &block))
         end
 
         def record(line)

actionpack/test/template/prototype_helper_test.rb

@@ -201,6 +201,14 @@ class JavaScriptGeneratorTest < Test::Unit::TestCase
       @generator.redirect_to(:action => 'welcome')
   end
   
+  def test_delay
+    @generator.delay(20) do
+      @generator.hide('foo')
+    end
+    
+    assert_equal "setTimeout(function() {\n;\nElement.hide(\"foo\");\n}, 20000);", @generator.to_s
+  end
+  
   def test_to_s
     @generator.insert_html(:top, 'element', '<p>This is a test</p>')
     @generator.insert_html(:bottom, 'element', '<p>This is a test</p>')