add custom table of contents for use with catalog (#63)

Author: nginx-jack

layouts/partials/catalog-toc.html

@@ -0,0 +1,16 @@
+{{/*  Parse param from front matter  */}}
+{{ $dataPath := split .Params.catalogType "." }}
+{{ $data := .Site.Data }}
+{{range $dataPath}}
+    {{ $data =  index $data . }}
+{{ end }}
+<nav id="TableOfContents">
+    <ul>
+        {{ range $data }}
+        {{/*  Render catalog toc list  */}}
+        <li>
+            <a href="#{{.name}}">{{.name}}</a>
+        </li>
+        {{ end }}
+    </ul>
+</nav>

layouts/partials/toc.html

@@ -1,18 +1,12 @@
 <nav class="bd-links" aria-label="Main navigation">
-
   <div class="bd-toc-item active">
-    
     <h3 class="bd-toc-link">What's on This Page</h3>
-
-    {{ with .TableOfContents }}
-  
-      {{ . }}
-    
+    {{ if .Params.catalogType }}
+      {{ partial "catalog-toc" . }}  
+    {{ else }}
+      {{ with .TableOfContents }}
+        {{ . }}
+      {{ end }}
     {{ end }}
-  
   </div>
-</nav>
-
-
-
-
+</nav>