Rails - Aug 2005 - Determine if layout was rendered from within a filter?

Hi,

I''ve got a filter setup in ApplicationController that tidies up any
HTML output from Rails, mostly from my templates. However, I only want
the output to be "tidied" if a layout is rendered for the action.
Otherwise, tidy will attempt to clean up AJAX responses (including
those that are automaticaly generated, i.e. auto_complete_for) which
aren''t HTML to begin with.

class ApplicationController < ActionController::Base
  after_filter :tidy
  def tidy
    response.body = Tidy.new(
        :output_xhtml => true,
        :wrap => 100, 
        :quiet => true,
        :indent => ''yes'').clean(response.body)
  end   
end

I want to do something like:
  def tidy
    return if rendered_layout.nil?
    response.body = Tidy.new(...).clean(response.body)
  end

After searching through the API and code for an hour, I can''t find any
such method. Any help?

Thanks!

--
Chris Lambert <chris.lambert-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>