Merge pull request #3126 from dwyde/arrow-keys-empty-notebook

Prevent errors when pressing arrow keys in an empty notebook Notebook.get_selected_cell() returns null in an empty notebook.
ipython · Apr 6, 2013 · bea4d94 · bea4d94
2 parents 9da25f6 + 5100e7d
commit bea4d94
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/IPython/frontend/html/notebook/static/js/notebook.js b/IPython/frontend/html/notebook/static/js/notebook.js
@@ -137,13 +137,13 @@ var IPython = (function (IPython) {
             }
             if (event.which === key.UPARROW && !event.shiftKey) {
                 var cell = that.get_selected_cell();
-                if (cell.at_top()) {
+                if (cell && cell.at_top()) {
                     event.preventDefault();
                     that.select_prev();
                 };
             } else if (event.which === key.DOWNARROW && !event.shiftKey) {
                 var cell = that.get_selected_cell();
-                if (cell.at_bottom()) {
+                if (cell && cell.at_bottom()) {
                     event.preventDefault();
                     that.select_next();
                 };
@@ -1381,7 +1381,7 @@ var IPython = (function (IPython) {
     /**
      * Run the selected cell.
      * 
-     * This executes code cells, and skips all others.
+     * Execute or render cell outputs.
      * 
      * @method execute_selected_cell
      * @param {Object} options Customize post-execution behavior