From bede9a22e86bb1c8debb945ccdfb22265393297d Mon Sep 17 00:00:00 2001
From: Frazer Kirkman <frazer@unitedvisions.org>
Date: Sun, 5 Feb 2017 18:42:59 +0100
Subject: [PATCH] added toggleHelp function

this way a key can be given ability to toggleHelp on and off.  Previously Reveal.showHelp could open the help screen, but no way to close it.
---
 js/reveal.js | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/js/reveal.js b/js/reveal.js
index 9251dc0..290097f 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -1628,6 +1628,18 @@
 
 	}
 
+	/**
+	 * Open or close help overlay window.
+	 */
+	function toggleHelp(){
+		if( dom.overlay ) {
+			closeOverlay();
+		}
+		else {
+			showHelp( true );
+		}
+	}
+	
 	/**
 	 * Opens an overlay window with help material.
 	 */
@@ -4113,12 +4125,7 @@
 
 		// Check if the pressed key is question mark
 		if( event.shiftKey && event.charCode === 63 ) {
-			if( dom.overlay ) {
-				closeOverlay();
-			}
-			else {
-				showHelp( true );
-			}
+			toggleHelp();
 		}
 
 	}
@@ -4818,6 +4825,7 @@
 
 		// Shows a help overlay with keyboard shortcuts
 		showHelp: showHelp,
+		toggleHelp: toggleHelp,
 
 		// Forces an update in slide layout
 		layout: layout,