README.md

Example for comment on openmonkey.com article "Rails Label Helpers with Blocks".

example_form.erb

<% form_for(@article, :builder => SmartLabelFormBuilder) do |form| %>
  <% form.label(:title, :text => 'Article Title') do %>
    <%= form.text_field(:title) %>
  <% end %>
<% end %>

form_builder_with_builtin_span.rb

class SmartLabelFormBuilder < ActionView::Helpers::FormBuilder
  def label(method, content_or_options_with_block = nil, options = {}, &block)
    if !block_given?
      # No block, use the standard label helper.
      super(method, content_or_options_with_block, options)
    else
      # We've got a block. This is where we want to do custom stuff.
      options = content_or_options_with_block.is_a?(Hash) ? content_or_options_with_block.stringify_keys : {}
      span_text = options.delete('text')

      @template.concat(@template.content_tag(:label, options) {
        @template.content_tag(:span, span_text) + @template.capture(&block)
      })
    end
  end
end