announcement-test/app/views/admin/announcements/_form_link.html.erb

<div class="input-prepend input-append start-line">
  <% url_id = "#{f.object_name.gsub(/[\[\]]+/, '_')}url" %>
  <span class="add-on icons-link" title="<%= t(:url) %>"></span>
  <%= f.text_field :url, class: "input-large", placeholder: t(:url), id: url_id %>
  <span class="add-on icons-pencil" title="<%= t(:url_alt) %>"></span>
  <span class="tab-content">
    <% @site_in_use_locales.each_with_index do |locale, i| %>
      <span class="tab-pane fade <%= ( i == 0 ) ? "in active" : '' %> <%= locale %>">
        <%= f.fields_for :title_translations do |f| %>
          <%= f.text_field locale, :class => "input-large", placeholder: t(:url_alt), :value => (form_link.title_translations[locale] rescue nil) %>
        <% end %>
      </span>
    <% end %>
  </span>
  
  <% if form_link.new_record? %>
    <span class="delete_link add-on btn" title="<%= t(:delete_) %>">
      <a class="icon-trash"></a>
    </span>
  <% else %>  
    <span class="remove_existing_record add-on btn" title="<%= t(:remove) %>">
      <%= f.hidden_field :id %>
      <a class="icon-remove"></a>
      <%= f.hidden_field :_destroy, :value => nil, :class => 'should_destroy' %>
    </span>
  <% end %>
  <script type="text/javascript">
    $('#<%=url_id%>').on('paste', function(e){
      var pastedData = e.originalEvent.clipboardData.getData('text');
      var _this = $(this);
      pastedData = pastedData.replace(new RegExp('^http(s|)://' + window.location.host), '');
      window.setTimeout(function(){
        _this.val(pastedData);
      }, 0);
    });
  </script>
</div>