document_actions_form_tag.rb

  def document_actions_form_tag
    capture do
      concat form_tag('', method: :post, id: 'document_actions_form')

      input_name_value_pairs(request.params).each do |name_value_pair|
        concat tag('input', { name: name_value_pair.first, value: name_value_pair.last, type: 'hidden' })
      end

      clazz = Class.new do
        def checkbox_header
          "<input type=\"checkbox\" id=\"select-all\" />".html_safe
        end

        def checkbox(document_id)
          "<input name=\"selected[#{document_id}]\" type=\"checkbox\" class=\"cb\" />".html_safe
        end
      end
      yield clazz.new

      concat '</form>'.html_safe
    end
  end