application_helper.rb

# will_paginateのリンク描画のみ行う
module WillPaginate
  module ViewHelpers
    def prepare_renderer(collection)
      renderer = WillPaginate::LinkRenderer.new
      options = {}.symbolize_keys.reverse_merge WillPaginate::ViewHelpers.pagination_options
      renderer.prepare collection, options, self
      renderer
    end

    def will_paginate_link_to(collection, page, text)
      prepare_renderer(collection).render_link(page, text)
    end

    def will_paginate_link_or_span(collection, page, text, span_class='disabled_span')
      prepare_renderer(collection).render_link_or_span(page, span_class, text)
    end
  end

  class LinkRenderer
    def render_link(page, text)
      page_link(page, text)
    end

    def render_link_or_span(page, span_class, text)
      page_link_or_span(page, span_class, text)
    end
  end

  class Collection
    def from_page
      [1, self.current_page - 5].max
    end

    def to_page
      [self.total_pages, self.current_page + 5].min
    end
  end
end


<div class="SearchNavi">-
  <p class="Result">-
  <span><%= posts.total_entries %>件</span>の検索結果
  &nbsp;&nbsp;
  <%= posts.offset + 1 %>～<%= posts.offset + posts.length %>件を表示中
  </p>-
  <div class="Pagination">-
    <p class="Prev">-
      <%= will_paginate_link_or_span posts, posts.previous_page, "&lt;&nbsp;前の#{posts.per_page}件" %>
    </p>-
    <ul>-
      <% ((posts.from_page)..(posts.to_page)).each {|page_no| %>
        <li>
          <%= will_paginate_link_or_span posts, page_no, page_no %>
        </li>
      <% } %>
    </ul>
    <p class="Next">-
      <%= will_paginate_link_or_span posts, posts.next_page, "次の#{posts.per_page}件&nbsp;&gt;" %>
    </p>-
  </div>-
</div>