Fixed issues that would prevent Incognito / Private browsing to work …

…in Safari (fixes #527)

CHANGELOG.md

@@ -14,6 +14,7 @@
     * Fix for visibility toggle on new page not working [#551](https://github.com/getgrav/grav-plugin-admin/issues/551)
     * Page tooltips usability issue [#496](https://github.com/getgrav/grav-plugin-admin/issues/496)
     * Fix removed title attribute from editor toolbar buttons [#539](https://github.com/getgrav/grav-plugin-admin/issues/539)
+    * Allow Incognito / Private browsing to still function in Safari [#527](https://github.com/getgrav/grav-plugin-admin/issues/527)
 
 # v1.1.0-beta.2
 ## 04/27/2016

themes/grav/app/pages/filter.js

@@ -4,6 +4,7 @@ import request from '../utils/request';
 import debounce from 'debounce';
 import { Instance as pagesTree } from './tree';
 import 'selectize';
+import '../utils/storage';
 
 /* @formatter:off */
 /* eslint-disable */

themes/grav/app/pages/tree.js

@@ -1,4 +1,5 @@
 import $ from 'jquery';
+import '../utils/storage';
 
 const sessionKey = 'grav:admin:pages';
 
@@ -9,7 +10,7 @@ if (!sessionStorage.getItem(sessionKey)) {
 export default class PagesTree {
     constructor(elements) {
         this.elements = $(elements);
-        this.session = JSON.parse(sessionStorage.getItem(sessionKey));
+        this.session = JSON.parse(sessionStorage.getItem(sessionKey) || '{}');
 
         if (!this.elements.length) { return; }
 

themes/grav/app/utils/storage.js

@@ -0,0 +1,41 @@
+// localStorage
+(function() {
+    function isSupported() {
+        var item = 'localStoragePollyfill';
+        try {
+            localStorage.setItem(item, item);
+            localStorage.removeItem(item);
+            sessionStorage.setItem(item, item);
+            sessionStorage.removeItem(item);
+            return true;
+        } catch (e) {
+            return false;
+        }
+    }
+
+    if (!isSupported()) {
+        try {
+            Storage.prototype._data = {};
+
+            Storage.prototype.setItem = function(id, val) {
+                this._data[id] = String(val);
+                return this._data[id];
+            };
+
+            Storage.prototype.getItem = function(id) {
+                return this._data.hasOwnProperty(id) ? this._data[id] : undefined;
+            };
+
+            Storage.prototype.removeItem = function(id) {
+                return delete this._data[id];
+            };
+
+            Storage.prototype.clear = function() {
+                this._data = {};
+                return this._data;
+            };
+        } catch (e) {
+            console.error('localStorage pollyfill error: ', e);
+        }
+    }
+}());