Fix bug.

app/views/admin/web_resources/_form.html.erb

@@ -159,7 +159,7 @@
             <label class="control-label muted"><%= t(:url) %></label>
             <div class="controls">
               <%= f.fields_for :url_translations do |f| %>
-                <%= f.text_field locale, class: "input-block-level", placeholder: t(:url), value: (@link.url_translations[locale] rescue nil) %>
+                <%= f.text_field locale, class: "input-block-level url_input", placeholder: t(:url), value: (@link.url_translations[locale] rescue nil) %>
               <% end %>
             </div>
           </div>
@@ -244,6 +244,14 @@
           filter.destroy();
         } );
       });
+      $('.url_input').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>