Module: RespondsToParent::ActionController

Included in:
ActionController::Base
Defined in:
lib/responds_to_parent/action_controller.rb

Overview

Module containing the methods useful for child IFRAME to parent window communication

Instance Method Summary collapse

Instance Method Details

#responds_to_parent(&block) ⇒ Object Also known as: respond_to_parent

Executes the response body as JavaScript in the context of the parent window. Use this method of you are posting a form to a hidden IFRAME or if you would like to use IFRAME base RPC.



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# File 'lib/responds_to_parent/action_controller.rb', line 7

def responds_to_parent(&block)
  yield

  if performed?
    # Either pull out a redirect or the request body
    script =  if location = erase_redirect_results
                "document.location.href = '#{self.class.helpers.escape_javascript location.to_s}'"
              else
                response.body || ''
              end

    # Clear out the previous render to prevent double render
    erase_results

    # We're returning HTML instead of JS or XML now
    response.headers['Content-Type'] = 'text/html; charset=UTF-8'
    @performed_render = false

    # Eval in parent scope and replace document location of this frame 
    # so back button doesn't replay action on targeted forms
    # loc = document.location to be set after parent is updated for IE
    # with(window.parent) - pull in variables from parent window
    # setTimeout - scope the execution in the windows parent for safari
    # window.eval - legal eval for Opera
    render :text => "<html><body><script type='text/javascript' charset='utf-8'>
      var loc = document.location;
      with(window.parent) { setTimeout(function() { window.eval('#{self.class.helpers.escape_javascript script}'); window.loc && loc.replace('about:blank'); }, 1) }
    </script></body></html>"
  end
end