add toc-tree shortcode

layouts/shortcodes/toc-tree.html

@@ -0,0 +1,35 @@
+{{ $tocLevels := default (default 6 .Site.Params.GeekdocToC) .Page.Params.GeekdocToC }}
+
+{{ if $tocLevels }}
+    <div class="gdoc-toc gdoc-toc__level--{{$tocLevels}}">
+        {{ template "toc-tree" dict "sect" .Page.Pages }}
+    </div>
+{{ end }}
+
+<!-- templates -->
+{{ define "toc-tree" }}
+    <ul>
+        {{ range .sect.GroupBy "Weight" }}
+            {{ range .ByTitle }}
+            {{ if not .Params.geekdocHidden }}
+            <li>
+            {{ if or .Content .Params.geekdocFlatSection }}
+                <span>
+                    <a href="{{ .RelPermalink }}" class="gdoc-toc__entry">
+                        {{ partial "title" . }}
+                    </a>
+                </span>
+            {{ else }}
+                <span>{{ partial "title" . }}</span>
+            {{ end }}
+
+            {{ $numberOfPages := (add (len .Pages) (len .Sections)) }}
+            {{ if and (ne $numberOfPages 0) (not .Params.geekdocFlatSection) }}
+                {{ template "toc-tree" dict "sect" .Pages }}
+            {{ end }}
+            </li>
+            {{ end }}
+            {{ end }}
+        {{ end }}
+    </ul>
+{{ end }}