Tower.js toggle @layout

applicationController.coffee

#
# applicationController.coffee
#
class App.ApplicationController extends Tower.Controller
  # @layout "application"  # ここに@layoutを置くと、上書きできない。

  constructor: ->
    @layout = "application"  # @layoutはcontructorの中に。
    @userAgent = ""

  # renderメソッドをオーバーライドする。
  render: (path, options={})->
    if typeof path isnt 'string'  # e.g. @render text: "This is text", status: 200
      options = path
      path = ""

    @setUserAgent()  # User-Agentをセット。

    if @userAgent.match /mobile/
      @layout = "application-mobile"
      path = "mobile/#{path}"

    unless options.layout?  # @render "welcome/index", layout: false などに対応。
      options.layout = @layout

    super path, options

  setUserAgent: () ->
    @userAgent = @getUserAgent().join(" ")

  getUserAgent: () ->
    arr = []
    ua = @request.headers['user-agent'].toLowerCase()

    # iPhone
    if ua.match /iphone/
      arr.push "iphone", "mobile"

    # Androidは省略

    return arr


#
# welcomesController.coffee (Just an example)
#
class App.WelcomeController extends App.ApplicationController
  index: ->
    @render text: "This is welcome#index"

  about: ->
    @render "welcome/about", layout: false