MAGETWO-53299: "Go Today" button is not working for dates range component

- return to static method and widget prototype extending

Author: iivashchenko

lib/web/mage/calendar.js

@@ -24,33 +24,45 @@
     var calendarBasePrototype,
         datepickerPrototype = $.datepicker.constructor.prototype;
 
+    $.datepicker.markerClassName = '_has-datepicker';
+
+    /**
+     * Get date/time according to store settings.
+     * We use serverTimezoneOffset (in seconds) instead of serverTimezoneSeconds
+     * in order to have ability to know actual store time even if page hadn't been reloaded
+     * @returns {Date}
+     */
+    function getTimezoneDate() {
+
+        // local time in ms
+        var ms = Date.now(),
+            options = $.calendarConfig ? $.calendarConfig : {};
+
+        // Adjust milliseconds according to store timezone offset,
+        // mind the GMT zero offset
+        if (typeof options.serverTimezoneOffset !== 'undefined') {
+            // Make UTC time and add store timezone offset in seconds
+            ms += new Date().getTimezoneOffset() * 60 * 1000 + options.serverTimezoneOffset * 1000;
+        } else if (typeof options.serverTimezoneSeconds !== 'undefined') {
+            //Set milliseconds according to client local timezone offset
+            ms = (options.serverTimezoneSeconds + new Date().getTimezoneOffset() * 60) * 1000;
+        }
+
+        return new Date(ms);
+    }
+
     /**
      * Extend JQuery date picker prototype with store local time methods
      */
     $.extend(datepickerPrototype, {
 
         /**
-         * Get date/time according to store settings.
-         * We use serverTimezoneOffset (in seconds) instead of serverTimezoneSeconds
-         * in order to have ability to know actual store time even if page hadn't been reloaded
+         * Get date/time according to store settings
          * @returns {Date}
+         * @private
          */
         _getTimezoneDate: function () {
-            // local time in ms
-            var ms = Date.now(),
-                options = $.calendarConfig ? $.calendarConfig : {};
-
-            // Adjust milliseconds according to store timezone offset,
-            // mind the GMT zero offset
-            if (typeof options.serverTimezoneOffset !== 'undefined') {
-                // Make UTC time and add store timezone offset in seconds
-                ms += new Date().getTimezoneOffset() * 60 * 1000 + options.serverTimezoneOffset * 1000;
-            } else if (typeof options.serverTimezoneSeconds !== 'undefined') {
-                //Set milliseconds according to client local timezone offset
-                ms = (options.serverTimezoneSeconds + new Date().getTimezoneOffset() * 60) * 1000;
-            }
-
-            return new Date(ms);
+            return getTimezoneDate();
         },
 
         /**
@@ -62,8 +74,6 @@
         }
     });
 
-    $.datepicker.markerClassName = '_has-datepicker';
-
     /**
      * Widget calendar
      */
@@ -396,7 +406,7 @@
          * @return {Object} date
          */
         getTimezoneDate: function () {
-            return datepickerPrototype._getTimezoneDate.call(this);
+            return getTimezoneDate();
         }
     });