From 87255938051dae52f895aca2ccdeb7d0679b0b05 Mon Sep 17 00:00:00 2001
From: Hakim El Hattab <hakim.elhattab@gmail.com>
Date: Thu, 13 Jul 2017 20:19:16 +0200
Subject: localstorage feature test in notes plugin, fixes speaker view error
 in safari

---
 plugin/notes/notes.html | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/plugin/notes/notes.html b/plugin/notes/notes.html
index e368a5f..4c5b799 100644
--- a/plugin/notes/notes.html
+++ b/plugin/notes/notes.html
@@ -675,7 +675,7 @@
 					document.body.setAttribute( 'data-speaker-layout', value );
 
 					// Persist locally
-					if( window.localStorage ) {
+					if( supportsLocalStorage() ) {
 						window.localStorage.setItem( 'reveal-speaker-layout', value );
 					}
 
@@ -687,7 +687,7 @@
 				 */
 				function getLayout() {
 
-					if( window.localStorage ) {
+					if( supportsLocalStorage() ) {
 						var layout = window.localStorage.getItem( 'reveal-speaker-layout' );
 						if( layout ) {
 							return layout;
@@ -701,6 +701,19 @@
 
 				}
 
+				function supportsLocalStorage() {
+
+					try {
+						localStorage.setItem('test', 'test');
+						localStorage.removeItem('test');
+						return true;
+					}
+					catch( e ) {
+						return false;
+					}
+
+				}
+
 				function zeroPadInteger( num ) {
 
 					var str = '00' + parseInt( num );
-- 
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