Added support for toggling visual effects to ScriptaculousHelper::visual_effect, #3323.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3350 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

 *SVN*
 
+* Added support for toggling visual effects to ScriptaculousHelper::visual_effect, #3323. [Thomas Fuchs]
+
 * Update to script.aculo.us to 1.5.0 rev. 3343 [Thomas Fuchs]
 
 * Added :select option for JavaScriptMacroHelper#auto_complete_field that makes it easier to only use part of the auto-complete suggestion as the value for insertion [Thomas Fuchs]

actionpack/lib/action_view/helpers/scriptaculous_helper.rb

@@ -14,6 +14,10 @@ module Helpers
     # See the documentation at http://script.aculo.us for more information on
     # using these helpers in your application.
     module ScriptaculousHelper
+      unless const_defined? :TOGGLE_EFFECTS
+        TOGGLE_EFFECTS = [:toggle_appear, :toggle_slide, :toggle_blind]
+      end
+      
       # Returns a JavaScript snippet to be used on the Ajax callbacks for
       # starting visual effects.
       #
@@ -31,12 +35,21 @@ module ScriptaculousHelper
       # This would fade the element that was dropped on the drop receiving 
       # element.
       #
+      # For toggling visual effects, you can use :toggle_appear, :toggle_slide, and
+      # :toggle_blind which will alternate between appear/fade, slidedown/slideup, and
+      # blinddown/blindup respectively.
+      #
       # You can change the behaviour with various options, see
       # http://script.aculo.us for more documentation.
       def visual_effect(name, element_id = false, js_options = {})
         element = element_id ? "'#{element_id}'" : "element"
         js_options[:queue] = "'#{js_options[:queue]}'" if js_options[:queue]
-        "new Effect.#{name.to_s.camelize}(#{element},#{options_for_javascript(js_options)});"
+        
+        if TOGGLE_EFFECTS.include? name.to_sym
+          "Effect.toggle(#{element},'#{name.to_s.gsub(/^toggle_/,'')}',#{options_for_javascript(js_options)});"
+        else
+          "new Effect.#{name.to_s.camelize}(#{element},#{options_for_javascript(js_options)});"
+        end
       end
       
       # Needs more work so + isn't required for concation of effects. Currently, you have to do:

actionpack/test/template/scriptaculous_helper_test.rb

@@ -29,6 +29,16 @@ def test_effect
     assert_equal "new Effect.Shake(element,{});", visual_effect(:shake)
     assert_equal "new Effect.DropOut('dropme',{queue:'end'});", visual_effect(:drop_out, 'dropme', :queue => :end)
   end
+  
+  def test_toggle_effects
+    assert_equal "Effect.toggle('posts','appear',{});", visual_effect(:toggle_appear, "posts")
+    assert_equal "Effect.toggle('posts','slide',{});", visual_effect(:toggle_slide, "posts")
+    assert_equal "Effect.toggle('posts','blind',{});", visual_effect(:toggle_blind, "posts")
+    assert_equal "Effect.toggle('posts','appear',{});", visual_effect("toggle_appear", "posts")
+    assert_equal "Effect.toggle('posts','slide',{});", visual_effect("toggle_slide", "posts")
+    assert_equal "Effect.toggle('posts','blind',{});", visual_effect("toggle_blind", "posts")
+  end
+  
 
   def test_parallel_effects
     actual = parallel_effects(:duration => 2) do