From 83a0216daffa630f5702dacc9678309bad5b010b Mon Sep 17 00:00:00 2001
From: Kostas Chatzikokolakis <kostas@chatzi.org>
Date: Thu, 12 Sep 2019 17:49:16 +0300
Subject: [PATCH] Disable highlight.js for code processed by Hugo's hl

---
 layouts/partials/reveal-hugo/slides.html | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/layouts/partials/reveal-hugo/slides.html b/layouts/partials/reveal-hugo/slides.html
index ac54247..d1157b2 100644
--- a/layouts/partials/reveal-hugo/slides.html
+++ b/layouts/partials/reveal-hugo/slides.html
@@ -4,6 +4,9 @@
   {{- if ne (len .Content) 0 -}}
     <!-- Remove the <hr /> tag generated by blackfriday for footnotes -->
     {{- $content := replace .Content "<div class=\"footnotes\">\n\n<hr />" "<div class=\"footnotes\">" -}}
+    <!-- <code> blocks processed by Hugo's highlighter have a data-lang attribute. For those, we disable -->
+    <!-- highlight.js by changing the language class to "nohighlight", and adding "data-noescape".       -->
+    {{- $content := replaceRE `<code class="language-\w+"\s+data-lang="\w+"` `<code class="nohighlight" data-noescape` $content -}}
     <!-- Support both <hr /> (blackfriday) and <hr> (mmark) -->
     {{- $content := replace $content "<hr>" "<hr />" -}}
     <!-- Split the processed content by <hr /> tag -->