From 8bb9e1c47555408ecd45705e33cf3a6bbe2469c5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Luis=20Ant=C3=BAnez?= <jlantunez@gmail.com>
Date: Sun, 22 Jan 2017 08:53:46 +0100
Subject: [PATCH] Back and forward buttons on browser

Wonderful work by Ramon https://github.com/ramon-src
---
 static/js/webslides-lite.js | 39 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/static/js/webslides-lite.js b/static/js/webslides-lite.js
index 02bcb7f..d13bce2 100644
--- a/static/js/webslides-lite.js
+++ b/static/js/webslides-lite.js
@@ -311,8 +311,45 @@ jQuery(document).ready(function($){
           }
         }
       });
+      
+      /**
+       *  Bind the event HashChange when the prev/next history button was clicked
+      */
+      jQuery(window).bind("hashchange", function () {
+        if (hasHash()) {
+          goToSlideIfSlideHashChange();
+        } else {
+          window.location.reload();
+        }
+      });
 
+      function hasHash() {
+        return window.location.hash ? true : false;
+      }
 
+      function goToSlideIfSlideHashChange() {
+        var paramsArr = getArrayOfHashParams();
+        var slideObj = $.grep(paramsArr, function (e) {
+          return (e.key == "slide");
+        });
+        if (slideObj.length == 1) {
+          goToSlide(slideObj[0].value);
+        }
+      }
+
+      function getArrayOfHashParams() {
+        var hash = window.location.hash.replace('#', '').split('&');
+        var paramsArr = new Array();
+        for (var i = 0; i < hash.length; i++) {
+          var itemArray = hash[i].split('=');
+          var action = new Object();
+          action.key = itemArray[0];
+          action.value = itemArray[1];
+          paramsArr.push(action);
+        }
+        return paramsArr;
+      }
+      
       // Tabs
       jQuery('ul.tabs li').click(function(){
           var $this = jQuery(this);
@@ -331,4 +368,4 @@ jQuery(document).ready(function($){
     $('body').toggleClass('baseline').css('height', $(document).height());
     }
   });
-   
\ No newline at end of file
+