1 files changed, 35 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/renderer/fibered_template_renderer.rb b/actionpack/lib/action_view/renderer/fibered_template_renderer.rb
new file mode 100644
index 0000000000..45f48cab76
--- /dev/null
+++ b/actionpack/lib/action_view/renderer/fibered_template_renderer.rb
@@ -0,0 +1,35 @@
+require 'action_view/renderer/template_renderer'
+require 'fiber'
+
+module ActionView
+  class FiberedTemplateRenderer < TemplateRenderer #:nodoc:
+    # Renders the given template. An string representing the layout can be
+    # supplied as well.
+    def render_template(template, layout_name = nil, locals = {}) #:nodoc:
+      view, locals = @view, locals || {}
+
+      final = nil
+      layout  = layout_name && find_layout(layout_name, locals.keys)
+      yielder = lambda { |*name| view._layout_for(*name) }
+
+      instrument(:template, :identifier => template.identifier, :layout => layout.try(:virtual_path)) do
+        @fiber = Fiber.new do
+          final = if layout
+            layout.render(view, locals, &yielder)
+          else
+            view._layout_for
+          end
+        end
+
+        @view._view_flow = FiberedFlow.new(view._view_flow, @fiber)
+        @fiber.resume
+
+        content = template.render(view, locals, &yielder)
+        view._view_flow.set(:layout, content)
+        @fiber.resume while @fiber.alive?
+      end
+
+      final
+    end
+  end
+end