Reuse sidebar of overviews and reactivate toc for adding sub-heading to content table

toc css will impact multiple pages, not only scala book

Author: mlachkar

_includes/sidebar-toc-multipage-book.html

@@ -1,7 +1,7 @@
 <div class="content-nav">
 	<div class="inner-box sidebar-toc-wrapper" style="">
 		<h5 class="contents">Contents</h5>
-		<div class="inner-toc" id="sidebar-toc">
+          <div class="inner-toc" id="sidebar-toc">
 
       <ul>
         {% assign sorted = site.overviews | sort: 'num' %}
@@ -16,7 +16,13 @@ <h5 class="contents">Contents</h5>
                 {% endif %}
               {% endfor %}
             {% else %} <!-- this must be English, so get the other documents' titles -->
-            <li><a {% if page.title == pg.title %}class="active"{% endif %} href="{{ site.baseurl }}{{ pg.url }}">{{ pg.title }}</a></li>
+
+              {% if pg.type %} <!-- if a type is set in a document, we add it as a class. Used in Scala book to diff between chapter and section -->
+                <li class="type-{{ pg.type }}"><a {% if page.title == pg.title %}class="active"{% endif %} href="{{ site.baseurl }}{{ pg.url }}">{{ pg.title }}</a></li>
+              {% else %}
+                <li><a {% if page.title == pg.title %}class="active"{% endif %} href="{{ site.baseurl }}{{ pg.url }}">{{ pg.title }}</a></li>
+              {% endif %}
+
             {% endif %}
             {% if pg.num == page.num %}<div id="toc"></div>{% endif %}
           {% endif %}

_includes/sidebar-toc-multipage-overview.html

@@ -1,6 +1,6 @@
 ---
 type: section
-layout: multipage-book
+layout: multipage-overview
 title: Abstract Classes
 description: This page shows how to use abstract classes, including when and why you should use abstract classes.
 partof: scala_book

_layouts/multipage-book.html

@@ -1,6 +1,6 @@
 ---
 type: section
-layout: multipage-book
+layout: multipage-overview
 title: Anonymous Functions
 description: This page shows how to use anonymous functions in Scala, including examples with the List class 'map' and 'filter' functions.
 partof: scala_book

_overviews/scala-book/abstract-classes.md

@@ -1,6 +1,6 @@
 ---
 type: section
-layout: multipage-book
+layout: multipage-overview
 title: The ArrayBuffer Class
 description: This page provides examples of how to use the Scala ArrayBuffer class, including adding and removing elements.
 partof: scala_book

_overviews/scala-book/anonymous-functions.md

@@ -1,6 +1,6 @@
 ---
 type: section
-layout: multipage-book
+layout: multipage-overview
 title: A Few Built-In Types
 description: A brief introduction to Scala's built-in types.
 partof: scala_book

_overviews/scala-book/arraybuffer-examples.md

@@ -1,6 +1,6 @@
 ---
 type: section
-layout: multipage-book
+layout: multipage-overview
 title: Case Classes
 description: This lesson provides an introduction to 'case classes' in Scala.
 partof: scala_book

_overviews/scala-book/built-in-types.md

@@ -1,6 +1,6 @@
 ---
 type: section
-layout: multipage-book
+layout: multipage-overview
 title: Case Objects
 description: This lesson introduces Scala 'case objects', which are used to create singletons with a few additional features.
 partof: scala_book

_overviews/scala-book/case-classes.md

@@ -1,6 +1,6 @@
 ---
 type: section
-layout: multipage-book
+layout: multipage-overview
 title: Auxiliary Class Constructors
 description: This page shows how to write auxiliary Scala class constructors, including several examples of the syntax.
 partof: scala_book