How to access tag helpers from a different scope (e.g. inside a helper object instance)?

[lancejpollard]

If I do this:

helpers =
  formFor: ->
    form = new Form(arguments…)
    form.render()

class Form
  constructor: ->

  render: ->
    form action: "/", ->
      input type: 'text'

…the form and input methods are undefined.

I see that it has something to do with how the function scopes are declared here:

• https://github.com/mauricemach/coffeekup/blob/master/src/coffeekup.coffee#L299

Since this and global don't include the coffeekup tag helper methods, how do I use them here?

I can see potentially running them through the coffeekup.compile method like this:

class Form
  render: ->
    require('coffeekup').compile ->
      form action: "/", ->
        input type: 'text'

But that seems like overkill. Is there a way to fix/add this?

Thanks!

[lancejpollard]

I was able to do a workaround by passing in the hidden __ck variable:

helpers =
  formFor: ->
    form = new Form(__ck, arguments…)
    form.render()

class Form
  constructor: (template, options) ->
    @template = template

  tag: (name, args…) ->
    @template.tag name, args

  render: ->
    @tag "form", action: "/", =>
      @tag "input", type: 'text'

There are still 2 problems with this approach:

1. I can't do template.tag "input", type: "text", I have to do something like template.tag "input", [type: "text"], hence the tag: (name, args…) -> method.
2. I don't have access to the tag helper variables (h1, h2, etc.). That's cool though, HAML was just like that, they had 1 method, used like @template.haml_tag "input", :type => "text".

Is there a better approach to this?