Add the AddBeforeExtension (round 2)

src/jupyter_contrib_nbextensions/nbextensions/addbefore/addbefore.yaml

@@ -0,0 +1,7 @@
+Type: IPython Notebook Extension
+Name: AddBefore
+Description: This extension enables the Add Cell before button (from iPython 1)
+Link: readme.md
+Icon: icon.png
+Main: main.js
+Compatibility: 4.x

src/jupyter_contrib_nbextensions/nbextensions/addbefore/main.js

@@ -0,0 +1,42 @@
+define([
+    'base/js/namespace',
+    'jquery',
+    'require',
+    'base/js/events',
+    'base/js/utils',
+], function(Jupyter, $, require, events, configmod, utils) {
+    "use strict";
+
+    var load_extension = function() {
+             Jupyter.toolbar.add_buttons_group([
+                 {
+                      'label'   : 'Insert Cell Above',
+                      'icon'    : 'fa-arrow-circle-o-up',
+                      'callback': function () {
+                                                    Jupyter.notebook.insert_cell_above('code');
+                                                    Jupyter.notebook.select_prev();
+                                                    Jupyter.notebook.focus_cell();
+                      }
+                 },
+                 {
+                      'label'   : 'Insert Cell Below',
+                      'icon'    : 'fa-arrow-circle-o-down',
+                      'callback': function () {
+                                                    Jupyter.notebook.insert_cell_below('code');
+                                                    Jupyter.notebook.select_next();
+                                                    Jupyter.notebook.focus_cell();
+                      }
+                 }
+                 ]);
+             $('#insert_above_below').remove()
+
+    };
+
+
+
+    var extension = {
+        load_jupyter_extension : load_extension,
+        load_ipython_extension : load_extension
+    };
+    return extension;
+});

src/jupyter_contrib_nbextensions/nbextensions/addbefore/readme.md

@@ -0,0 +1,9 @@
+This extension adds a button to add a empty cell before the currently active cell.
+As was present in IPython 1.0.
+It is with a circled up arrow.
+The plus signed "Add Cell After button" is moved to be next to Add Cell Before,
+and given matching circled down arrow icon.
+
+The functionality of the buttons are as per in the Insert Menu,
+for Insert Cell Above, and Insert Cell Below.
+A empty cell is added, and it takes the cursor focus.