Module: RespondsToParent

Defined in:
lib/active_scaffold/responds_to_parent.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/active_scaffold/responds_to_parent.rb', line 29

def responds_to_parent(&block)
  yield
  
  if performed?
    # We're returning HTML instead of JS or XML now
    response.headers['Content-Type'] = 'text/html; charset=UTF-8'
    
    # Either pull out a redirect or the request body
    script =  if response.headers['Location']
                #TODO: erase_redirect_results is missing in rails 3.0 has to be implemented
                #erase redirect
                "document.location.href = #{location.to_s.inspect}"
              else
                response.body
              end
              
    # Escape quotes, linebreaks and slashes, maintaining previously escaped slashes
    # Suggestions for improvement?
    script = (script || '').
      gsub('\\', '\\\\\\').
      gsub(/\r\n|\r|\n/, '\\n').
      gsub(/['"]/, '\\\\\&').
      gsub('</script>','</scr"+"ipt>')

    # Clear out the previous render to prevent double render
    response.request.env['action_controller.instance'].instance_variable_set(:@_response_body, nil)
    
    # 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('#{script}'); if (typeof(loc) !== 'undefined') loc.replace('about:blank'); }, 1) };
      </script></body></html>".html_safe
  end
end