Spine.js get active controller from stack

active_controller.js.coffee

Spine.Stack.include
  active_controller: ()->
    @manager.active_controller


window.app = new App

app.manager.bind 'change', (controller)->
  console.log 'stack change', this, arguments
  @active_controller = controller

index.coffee

# this is how/why the above is being used:

class window.App extends Spine.Stack
  el: '#content'

#  controllers:
    # ...

  events:
    # by specifying tagnames and events, we allow html5 form validation
    "click a[data-action]": 'auto_action'
    "submit form[data-action]": "auto_action"

  # the active controller is passed the action, context is maintained
  auto_action: (event)->
    console.log 'auto action', arguments, this, event
    event.preventDefault();
    ajax_status('done')
    action = $(event.currentTarget || event.target).data('action')
    @active_controller()[action]()