add dialog when loading newer minor-version notebooks

IPython/frontend/html/notebook/static/js/notebook.js

@@ -32,6 +32,7 b' var IPython = (function (IPython) {'
         this.notebook_name = null;
         this.notebook_name_blacklist_re = /[\/\\:]/;
         this.nbformat = 3 // Increment this when changing the nbformat
+        this.nbformat_minor = 0 // Increment this when changing the nbformat
         this.style();
         this.create_elements();
         this.bind_events();
@@ -1050,6 +1051,7 b' var IPython = (function (IPython) {'
         var data = this.toJSON();
         data.metadata.name = this.notebook_name;
         data.nbformat = this.nbformat;
+        data.nbformat_minor = this.nbformat_minor;
         // We do the call with settings so we can set cache to false.
         var settings = {
             processData : false,
@@ -1126,6 +1128,31 b' var IPython = (function (IPython) {'
                 },
                 width: 400
             });
+        } else if (data.orig_nbformat_minor !== undefined && data.nbformat_minor !== data.orig_nbformat_minor) {
+            var that = this;
+            var orig_vs = 'v' + data.nbformat + '.' + data.orig_nbformat_minor;
+            var this_vs = 'v' + data.nbformat + '.' + this.nbformat_minor;
+            msg = "This notebook is version " + orig_vs + ", but we only fully support up to " +
+            this_vs + ".  You can still work with this notebook, but some features " +
+            "introduced in later notebook versions may not be available."
+            
+            var dialog = $('<div/>');
+            dialog.html(msg);
+            this.element.append(dialog);
+            dialog.dialog({
+                resizable: false,
+                modal: true,
+                title: "Newer Notebook",
+                closeText: "",
+                close: function(event, ui) {$(this).dialog('destroy').remove();},
+                buttons : {
+                    "OK": function () {
+                        $(this).dialog('close');
+                    }
+                },
+                width: 400
+            });
+            
         }
         // Create the kernel after the notebook is completely loaded to prevent
         // code execution upon loading, which is a security risk.