gistfile1.rb

class GeneralPurposeFormBuilder < ActionView::Helpers::FormBuilder
  %w[text_field text_area collection_select].each do |method_name|
    define_method(method_name) do |field_name, *args|
      @template.content_tag(:div, field_label(field_name, *args) +
                                  "<br />" + super + field_hint(field_name, *args),
                                  :id => field_container_name(field_name),
                                  :class => "form_field")
    end
  end
  
  def date_select(field_name, *args)
    options = args.extract_options!
    if options[:use_defaults]
      options[:start_year] = Time.now.year - 67
      options[:end_year] = Time.now.year - 13
      options[:order] = [:day, :month, :year]
      options[:include_blank] = true;
      options[:default] = { }
    end
    
    *args = *(args + [options])
    
    @template.content_tag(:div, field_label(field_name, *args) + "<br />" + super + field_hint(field_name, *args),
                                :id => field_container_name(field_name), :class => "form_field")
  end
  
  def check_box(field_name, *args)
    @template.content_tag(:div, super + " " + field_label(field_name, *args) + field_hint(field_name, *args),
                                :id => field_container_name(field_name), :class => "form_field")
  end
  
  def submit(*args)
    cancel_link = ""
    options = args.extract_options!
    
    if options[:cancel_link_url]
      cancel_link << "&nbsp;or&nbsp;"
      cancel_link << @template.link_to(options[:cancel_link_text] ? options[:cancel_link_text] : "cancel",
                                      options[:cancel_link_url])
      cancel_link = @template.content_tag(:span, cancel_link, :id => field_container_name("cancel"))
    end
    
    @template.content_tag(:div, super + cancel_link, :id => field_container_name("submit"), :class => "form_submit")
  end
  
  private
  
  def field_container_name(field_name)
    "#{object.class.to_s.downcase}_#{field_name}_field"
  end
  
  def field_label(field_name, *args)
    options = args.extract_options!
    options[:label_class] = field_required?(field_name) ? "required_field_label" : "field_label"
    label(field_name, options[:label], :class => options[:label_class])
  end
  
  def field_hint(field_name, *args)
    options = args.extract_options!
    if options[:hint]
      @template.content_tag(:div, options[:hint], :id => "#{field_name}_hint", :class => "field_help")
    else
      ''
    end
  end
  
  def field_required?(field_name)
    object.class.reflect_on_validations_for(field_name).map(&:macro).include?(:validates_presence_of)
  end
  
  def objectify_options(options)
    super.except(:label, :label_class, :hint, :cancel_link_url, :cancel_link_text, :use_defaults)
  end
end