gen_an_index

# File lib/rdoc/generator/html.rb, line 251
  def gen_an_index(collection, title, template, filename)
    template = RDoc::TemplatePage.new @template::FR_INDEX_BODY, template
    res = []
    collection.sort.each do |f|
      if f.document_self
        res << { "href" => f.path, "name" => f.index_name }
      end
    end

    values = {
      "entries"    => res,
      'title'      => CGI.escapeHTML("#{title} [#{@options.title}]"),
      'list_title' => CGI.escapeHTML(title),
      'index_url'  => @main_url,
      'charset'    => @options.charset,
      'style_url'  => style_url('', @options.css),
    }

    open filename, 'w' do |f|
      template.write_html_on(f, values)
    end
  end