faster kaminary pagination view helper replacement

gistfile1.rb

  def faster_paginate collection
    output = ''
    if collection.num_pages > 1
      output << "<nav class='pagination'>"
      page_base = collection.current_page
      if page_base > 4
        output << content_tag(:span, class: 'first') do
          link_to raw(t 'views.pagination.first'), url_for(params.merge(page: 1))
        end
        output << content_tag(:span, class: 'page gap') { '... '}
      end

      (page_base <= 3 ? 1 : page_base - 3 ).upto(page_base > collection.num_pages - 3 ? collection.num_pages : page_base + 3) do |page|
        output << content_tag(:span, class: "page") do
          link_to_unless (collection.current_page == page), page.to_s, url_for(params.merge(page: page))
        end
      end
      if page_base < collection.num_pages - 3
        output << content_tag(:span, class: 'page gap') { '... '}
        output << content_tag(:span, class: 'last') do
          link_to raw(t 'views.pagination.last'), url_for(params.merge(page: collection.num_pages))
        end
      end
      output << "</nav>"
    end
    output.html_safe
  end