Module: ActiveScaffold::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 7

def responds_to_parent(&block)
  yield
  return unless performed?

  # Either pull out a redirect or the request body
  script =
    if response.headers['Location']
      "document.location.href = '#{self.class.helpers.escape_javascript response.headers.delete('Location').to_s}'"
    else
      response.body || ''
    end
  response.status = 200 if (300...400).cover? response.status

  # 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
  script = "<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>"

  # Clear out the previous render to prevent double render and then render
  if respond_to?(:erase_results, true)
    erase_results
  else
    instance_variable_set(:@_response_body, nil)
  end

  # We're returning HTML instead of JS now, content_type needed if not inside respond_to block
  render html: script.html_safe, content_type: 'text/html' # rubocop:disable Rails/OutputSafety
end