Datepicker: Added onSelect.apply() call to _doKeyDown method when enter button pushed if onSelect is defined. Fixed #7124 - Datepicker: onSelect does not fire when enter button is pushed

(cherry picked from commit a56aa86)

Author: marcneuwirth

tests/unit/datepicker/datepicker_events.js

@@ -46,6 +46,11 @@ test('events', function() {
 		simulate('keydown', {keyCode: $.simulate.VK_ESC});
 	equals(selectedDate, $.datepicker.formatDate('mm/dd/yy', date),
 		'Callback selected date - esc');
+    var dateStr = '02/04/2008';
+    inp.val(dateStr).datepicker('show').
+        simulate('keydown', {keyCode: $.simulate.VK_ENTER});
+    equals(dateStr, selectedDate, 
+        'onSelect is called after enter keydown');
 	// onChangeMonthYear
 	inp.datepicker('option', {onChangeMonthYear: callback2, onSelect: null}).
 		val('').datepicker('show');

ui/jquery.ui.datepicker.js

@@ -520,6 +520,13 @@ $.extend(Datepicker.prototype, {
 									$.datepicker._currentClass + ')', inst.dpDiv);
 						if (sel[0])
 							$.datepicker._selectDay(event.target, inst.selectedMonth, inst.selectedYear, sel[0]);
+							var onSelect = $.datepicker._get(inst, 'onSelect');
+							if (onSelect) {
+								var dateStr = $.datepicker._formatDate(inst);
+
+								// trigger custom callback
+								onSelect.apply((inst.input ? inst.input[0] : null), [dateStr, inst]);
+							}
 						else
 							$.datepicker._hideDatepicker();
 						return false; // don't submit the form