From a7db17b0b2d1a2ee720c9b923d0db1fc051c5c97 Mon Sep 17 00:00:00 2001
From: Frederic Guillot <fred@kanboard.net>
Date: Sat, 11 Mar 2017 17:45:13 -0500
Subject: Move isVisible() method

---
 assets/js/core/utils.js | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'assets/js/core/utils.js')

diff --git a/assets/js/core/utils.js b/assets/js/core/utils.js
index a3683122..ed38cf17 100644
--- a/assets/js/core/utils.js
+++ b/assets/js/core/utils.js
@@ -94,3 +94,23 @@ KB.utils.getViewportSize = function () {
         height: Math.max(document.documentElement.clientHeight, window.innerHeight || 0)
     };
 };
+
+KB.utils.isVisible = function() {
+    var property = '';
+
+    if (typeof document.hidden !== 'undefined') {
+        property = 'visibilityState';
+    } else if (typeof document.mozHidden !== 'undefined') {
+        property = 'mozVisibilityState';
+    } else if (typeof document.msHidden !== 'undefined') {
+        property = 'msVisibilityState';
+    } else if (typeof document.webkitHidden !== 'undefined') {
+        property = 'webkitVisibilityState';
+    }
+
+    if (property !== '') {
+        return document[property] === 'visible';
+    }
+
+    return true;
+};
-- 
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