1 files changed, 14 insertions, 14 deletions
diff --git a/templates/_nav.html b/templates/_nav.html
index b183a57..0ab8ac7 100644
--- a/templates/_nav.html
+++ b/templates/_nav.html
@@ -10,6 +10,7 @@
 {% endmacro %}
 
 {# -------------------------- #}
+{# -------------------------- #}
 
 {# (Private) Shared+root logic to build the menu #}
 {% macro inner_nav(root, current) %}
@@ -34,7 +35,7 @@
   {% endif %}   
 {% endmacro %}
 
-{# On small screens, like a smartphone, hide the menu behind an hamburger icon #}
+{# (Private) On small screens, like a smartphone, hide the menu behind an hamburger icon #}
 {% macro hamburger(root) %}
   <input id="menu-toggle" type="checkbox" />
   <label class='menu-button-container' for="menu-toggle">
@@ -43,10 +44,11 @@
   </label>
 {% endmacro %}
 
-{# Build a breadcrumb for the page #}
+{# (Private) Build a breadcrumb for the page #}
 {# It's ugly because this is the hacky part of the project #}
 {% macro breadcrumb(corpus, root, target) %}{% if 'parent' in target.extra and target.extra.parent != root %}{% set new_target = get_page(path=target.extra.parent) %}{{ nav::breadcrumb(corpus=corpus, root=root, target=new_target) }}:{{ new_target.relative_path }}{% endif %}{% endmacro %}
 
+{# (Private) Render a list menu (this is the simple fallback when extra.parent is not defined #}
 {% macro list(list, selected) %}
   {% for page in list %}
     {% set is_selected = page.relative_path == selected.relative_path %}
@@ -56,26 +58,27 @@
   {% endfor %}
 {% endmacro %}
 
-{# Tree menu rendering #}
+{# (Private) Tree menu rendering; this function is recursive #}
+{# this function takes a breadcrumb to know which part of the menu must be unfolded #}
 {% macro tree(tree, cursor, selected, crumb) %}
   {% for page in tree | get(key=cursor) %}
   {% set is_selected = page.relative_path == selected.relative_path %}
   <div class="toc-item">
 
-    {# LINK WITH SUBSECTION #}
+    {# Link with a (possible) subsection #}
     {% if page.relative_path in tree %}
+      {# Display link as a section #}
       {{ nav::link(page=page, is_selected=is_selected, is_parent=true) }} 
+
+      {# Should we unroll this part of the tree? #}
       {% if page.relative_path in crumb or is_selected %}
         <div class="nav-subsection">
-          {% set ncrumb = crumb | slice(start=1) %}
-          {% set ncursor = page.relative_path %}
-          {% if ncursor in tree %}
-            {{ nav::tree(tree=tree, cursor=ncursor, selected=selected, crumb=ncrumb) }}
-          {% endif %}
+          {# do the recursive call #}
+          {{ nav::tree(tree=tree, cursor=page.relative_path, selected=selected, crumb=crumb) }}
         </div>
       {% endif %}
 
-    {# SIMPLE LINK #}
+    {# Simple link, ie. a leaf of the tree #}
     {% else %}
       {{ nav::link(page=page, is_selected=is_selected, is_parent=false) }}
     {% endif %}
@@ -83,10 +86,7 @@
   {% endfor %}
 {% endmacro %}
 
-{% macro subsection() %}
-
-{% endmacro %}
-
+{# (Private) Render a single link #}
 {% macro link(page, is_selected, is_parent) %}
   <a class="subtext" href="{{page.permalink | safe}}">
       {% if is_selected %}<b>{% endif %}