Solr highlighting for blacklight

_document_list.html.erb

<% # container for all documents in index view -%>
<div id="documents">

  <% # loop thru each doc -%>
  <% @document_list.each_with_index do |document,counter| %>

    <% # container for a single doc -%>
    <div class="document">

      <% # header bar for doc items in index view -%>
      <div class="documentHeader yui-g">
        
        <% # list controls for items/docs -%>
        <div class="yui-u documentFunctions">
          <%= render :partial=>'bookmark_control', :locals=>{:document=>document} %>
        </div>
        
        <% # main title container for doc partial view -%>

        <div class="yui-u">
          <h3 class="index_title"><%= counter + 1 + @response.params[:start].to_i %>. <%= link_to_document document, :label=>document_show_link_field, :counter => (counter + 1 + @response.params[:start].to_i) %></h3>
        <% # here's the line to add the highlighted field: -%>
          <div class="highlight"><%= field_with_highlighting(document, 'content') %></div>
        </div>
        
      </div>
      
      <% # main container for doc partial view -%>
      <%= render_document_partial document, :index %>

    </div>
    
  <% end %>
</div>

application_helper.rb

require_dependency 'vendor/plugins/blacklight/app/helpers/application_helper.rb'
# Methods added to this helper will be available to all templates in the application.
module ApplicationHelper
#[...]
  def field_with_highlighting document, field, sep='...'
    #this is pretty ugly.. 
    return @response['highlighting'][document.get(:id)][field].join(sep) unless @response['highlighting'][document.get(:id)].blank?
  end
end

solrconfig.xml

<!-- Searching ("All Fields") -->
  <requestHandler name="search" class="solr.SearchHandler" default="true" >
    <lst name="defaults">
    [...]
      <!-- Enable field highlighting using the default (pretty naive..) settings-->
      <str name="hl">true</str>
      <str name="hl.fl">content</str>
    </lst>
    [...]
  </requestHandler>