From 30b670cf42c458b80d0af22abeb5162507229061 Mon Sep 17 00:00:00 2001
From: Hakim El Hattab <hakim.elhattab@gmail.com>
Date: Thu, 24 May 2018 09:21:37 +0200
Subject: [PATCH] flatten slide number when there are only vertical slides

---
 js/reveal.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/js/reveal.js b/js/reveal.js
index 163bc99f2f8..0f409770c0d 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -3043,6 +3043,12 @@
 				format = config.slideNumber;
 			}
 
+			// If there are ONLY vertical slides in this deck, always use
+			// a flattened slide number
+			if( !/c/.test( format ) && dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ).length === 1 ) {
+				format = 'c';
+			}
+
 			switch( format ) {
 				case 'c':
 					value.push( getSlidePastCount() + 1 );