Method: Porthole::Sinatra::Helpers#porthole

Defined in:
lib/porthole/sinatra.rb

#porthole(template, options = {}, locals = {}) ⇒ Object

Call this in your Sinatra routes.



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# File 'lib/porthole/sinatra.rb', line 57

def porthole(template, options={}, locals={})
  # Locals can be passed as options under the :locals key.
  locals.update(options.delete(:locals) || {})

  # Grab any user-defined settings.
  if settings.respond_to?(:porthole)
    options = settings.send(:porthole).merge(options)
  end

  # If they aren't explicitly disabling layouts, try to find
  # one.
  if options[:layout] != false
    # Let the user pass in a layout name.
    layout_name = options[:layout]

    # If all they said was `true` (or nothing), default to :layout.
    layout_name = :layout if layout_name == true || !layout_name

    # If they passed a layout name use that.
    layout = porthole_class(layout_name, options)

    # If it's just an anonymous subclass then don't bother, otherwise
    # give us a layout instance.
    if layout.name && layout.name.empty?
      layout = nil
    else
      layout = layout.new
    end
  end

  # If instead of a symbol they gave us a Porthole class,
  # use that for rendering.
  klass = template if template.is_a?(Class) && template < Porthole

  # Find and cache the view class we want if we don't have
  # one yet. This ensures the compiled template is cached,
  # too - no looking up and compiling templates on each page
  # load.
  if klass.nil?
    klass = porthole_class(template, options)
  end

  # Does the view subclass the layout? If so we'll use the
  # view to render the layout so you can override layout
  # methods in your view - tricky.
  view_subclasses_layout = klass < layout.class if layout

  # Create a new instance for playing with.
  instance = klass.new

  # Copy instance variables set in Sinatra to the view
  instance_variables.each do |name|
    instance.instance_variable_set(name, instance_variable_get(name))
  end

  # Render with locals.
  rendered = instance.render(instance.template, locals)

  # Now render the layout with the view we just rendered, if we
  # need to.
  if layout && view_subclasses_layout
    rendered = instance.render(layout.template, :yield => rendered)
  elsif layout
    rendered = layout.render(layout.template, :yield => rendered)
  end

  # That's it.
  rendered
end