Add current url to navheader as data attribute

Author: reakaleek

resources/asciidoctor/lib/chunker/extension.rb

@@ -75,8 +75,8 @@ def convert_inline_anchor(node)
       yield
     end
 
-    def add_nav(doc)
-      nav = Nav.new doc
+    def add_nav(doc, section)
+      nav = Nav.new doc, section
       doc.blocks.insert 0, nav.header
       doc.blocks.append nav.footer
     end

resources/asciidoctor/lib/chunker/nav.rb

@@ -10,10 +10,10 @@ class Nav
 
     attr_reader :header, :footer
 
-    def initialize(doc)
-      body = nav_body doc
+    def initialize(doc, section)
+      body = nav_body doc, section
       @header = Asciidoctor::Block.new(doc, :pass, source: <<~HTML)
-        <div class="navheader">
+        <div class="navheader" data-current-url="#{section.id}.html">
         #{body}
         </div>
       HTML