haml--haml/lib/haml/template.rb

require File.dirname(__FILE__) + '/engine'
require 'active_support'
require 'action_view'

module Haml
  class Template
    def initialize(view)
      @view = view
    end

    def render(template, local_assigns={})
      assigns = @view.assigns.dup
  
      # Do content for layout on its own to keep things working in partials
      if content_for_layout = @view.instance_variable_get("@content_for_layout")
        assigns['content_for_layout'] = content_for_layout
      end

      # Get inside the view object's world
      @view.instance_eval do
        # Set all the instance variables
        assigns.each do |key,val|
          instance_variable_set "@#{key}", val
        end
        # Set all the local assigns
        local_assigns.each do |key,val|
          class << self; self; end.send(:define_method, key) { val }
        end
      end
      
      Haml::Engine.new(template, :scope_object => @view).to_html
    end
  end
end

module ActionView
  class Base
    attr :haml_filename, true
  
    alias haml_old_render_file render_file
    def render_file(template_path, use_full_path = true, local_assigns = {})
      @haml_filename = File.basename(template_path)
      haml_old_render_file(template_path, use_full_path, local_assigns)
    end
  end
end