Merge PR-883

Notify user if notebook save fails.

closes  #883

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

@@ -871,7 +871,8 b' var IPython = (function (IPython) {'
                 type : "PUT",
                 data : JSON.stringify(data),
                 headers : {'Content-Type': 'application/json'},
-                success : $.proxy(this.notebook_saved,this)
+                success : $.proxy(this.notebook_saved,this),
+                error : $.proxy(this.notebook_save_failed,this)
             };
             IPython.save_widget.status_saving();
             $.ajax("/notebooks/" + notebook_id, settings);
@@ -881,10 +882,19 b' var IPython = (function (IPython) {'
 
     Notebook.prototype.notebook_saved = function (data, status, xhr) {
         this.dirty = false;
+        IPython.save_widget.notebook_saved();
         setTimeout($.proxy(IPython.save_widget.status_save,IPython.save_widget),500);
     }
 
 
+    Notebook.prototype.notebook_save_failed = function (xhr, status, error_msg) {
+        // Notify the user and reset the save button
+        // TODO: Handle different types of errors (timeout etc.)
+        alert('An unexpected error occured while saving the notebook.');
+        setTimeout($.proxy(IPython.save_widget.reset_status,IPython.save_widget),500);                                                                               
+    }
+
+
     Notebook.prototype.load_notebook = function (callback) {
         var that = this;
         var notebook_id = IPython.save_widget.get_notebook_id();

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

@@ -15,7 +15,7 b' var IPython = (function (IPython) {'
 
     var SaveWidget = function (selector) {
         this.selector = selector;
-        this.notebook_name_re = /[^/\\]+/
+        this.notebook_name_blacklist_re = /[\/\\]/
         this.last_saved_name = '';
         if (this.selector !== undefined) {
             this.element = $(selector);
@@ -49,6 +49,10 b' var IPython = (function (IPython) {'
 
     SaveWidget.prototype.save_notebook = function () {
         IPython.notebook.save_notebook();
+    };
+
+
+    SaveWidget.prototype.notebook_saved = function () {
         this.set_document_title();
         this.last_saved_name = this.get_notebook_name();
     };
@@ -96,14 +100,14 b' var IPython = (function (IPython) {'
 
     SaveWidget.prototype.test_notebook_name = function () {
         var nbname = this.get_notebook_name();
-        if (this.notebook_name_re.test(nbname)) {
+        if (this.notebook_name_blacklist_re.test(nbname) == false) {
             return true;
         } else {
             var bad_name = $('<div/>');
             bad_name.html(
                 "The notebook name you entered (" +
                 nbname +
-                ") is not valid. Notebook names can contain any characters except / and \\"
+                ") is not valid. Notebook names can contain any characters except / and \\."
             );
             bad_name.dialog({title: 'Invalid name', modal: true});
             return false;
@@ -111,6 +115,11 b' var IPython = (function (IPython) {'
     };
 
 
+    SaveWidget.prototype.reset_status = function () {
+        this.is_renaming();
+    };
+
+
     SaveWidget.prototype.status_save = function () {
         this.element.find('button#save_notebook').button('option', 'label', '<u>S</u>ave');
         this.element.find('button#save_notebook').button('enable');