From 99d9afa4730b532604886aadbc1551777aa5d563 Mon Sep 17 00:00:00 2001
From: Michael Chow <machow@princeton.edu>
Date: Wed, 15 Apr 2020 17:02:30 -0400
Subject: [PATCH 1/2] sketch of toggling input

---
 doc/conf.py            |  1 +
 doc/hidden-cells.ipynb | 60 ++++++++++++++++++++++++++++++++++++++++--
 doc/requirements.txt   |  1 +
 src/nbsphinx.py        |  5 ++++
 4 files changed, 65 insertions(+), 2 deletions(-)

diff --git a/doc/conf.py b/doc/conf.py
index fd29b637..ae71f5ea 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -13,6 +13,7 @@
     'sphinxcontrib.bibtex',  # for bibliographic references
     'sphinxcontrib.rsvgconverter',  # for SVG->PDF conversion in LaTeX output
     'sphinx_gallery.load_style',  # load CSS for gallery (needs SG >= 0.6)
+    'sphinx_togglebutton',
 ]
 
 # Default language for syntax highlighting in reST and Markdown cells:
diff --git a/doc/hidden-cells.ipynb b/doc/hidden-cells.ipynb
index a848aedc..2271bd3f 100644
--- a/doc/hidden-cells.ipynb
+++ b/doc/hidden-cells.ipynb
@@ -79,6 +79,62 @@
    "source": [
     "This is the cell after the hidden cell."
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Toggling Cells\n",
+    "\n",
+    "You can make a cell toggle-able by adding \"hide_input\" to the cell metadata tags\n",
+    "\n",
+    "TODO: check how adding a tag is explained in other parts of doc"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {
+    "tags": [
+     "toggle_input"
+    ]
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "15"
+      ]
+     },
+     "execution_count": 9,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "1 + 14"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {
+    "tags": [
+     "hide_output"
+    ]
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "my output is hidden\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"my output is hidden\")"
+   ]
   }
  ],
  "metadata": {
@@ -97,9 +153,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.7"
+   "version": "3.6.8"
   }
  },
  "nbformat": 4,
- "nbformat_minor": 2
+ "nbformat_minor": 4
 }
diff --git a/doc/requirements.txt b/doc/requirements.txt
index b0bddb43..236fe4ce 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -7,4 +7,5 @@ sphinxcontrib-svg2pdfconverter
 ipywidgets
 sphinx-copybutton
 sphinx-gallery
+sphinx-togglebutton
 jupytext
diff --git a/src/nbsphinx.py b/src/nbsphinx.py
index 63211574..be1a96fc 100644
--- a/src/nbsphinx.py
+++ b/src/nbsphinx.py
@@ -115,6 +115,9 @@
 {%- if not cell.outputs %}
     :no-output:
 {%- endif %}
+{%- if 'toggle_input' in cell.metadata.tags %}
+    :class: toggle
+{%- endif %}
 
 {{ cell.source.strip('\n') | indent }}
 {% endblock input %}
@@ -1045,6 +1048,7 @@ def _create_code_nodes(directive):
         outer_classes = ['nbinput']
         if 'no-output' in directive.options:
             outer_classes.append('nblast')
+        outer_classes.append(directive.options.get('class', ''))
         inner_classes = ['input_area']
         prompt_template = config.nbsphinx_input_prompt
         if not execution_count:
@@ -1122,6 +1126,7 @@ class NbInput(rst.Directive):
         'empty-lines-before': rst.directives.nonnegative_int,
         'empty-lines-after': rst.directives.nonnegative_int,
         'no-output': rst.directives.flag,
+        'class': rst.directives.unchanged,
     }
     has_content = True
 

From 4cf34146563a4c2ea0be50a0d514129101ae2f37 Mon Sep 17 00:00:00 2001
From: Michael Chow <machow@princeton.edu>
Date: Wed, 15 Apr 2020 17:10:26 -0400
Subject: [PATCH 2/2] re-run and save doc notebook

---
 doc/hidden-cells.ipynb | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

diff --git a/doc/hidden-cells.ipynb b/doc/hidden-cells.ipynb
index 2271bd3f..498e6397 100644
--- a/doc/hidden-cells.ipynb
+++ b/doc/hidden-cells.ipynb
@@ -93,31 +93,20 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 3,
    "metadata": {
     "tags": [
      "toggle_input"
     ]
    },
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "15"
-      ]
-     },
-     "execution_count": 9,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "1 + 14"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 4,
    "metadata": {
     "tags": [
      "hide_output"