1 files changed, 34 insertions, 0 deletions
diff --git a/framework/Web/UI/ActiveControls/TScalarDiff.php b/framework/Web/UI/ActiveControls/TScalarDiff.php
new file mode 100644
index 00000000..ac8ff950
--- /dev/null
+++ b/framework/Web/UI/ActiveControls/TScalarDiff.php
@@ -0,0 +1,34 @@
+<?php
+/**
+ * TActiveControlAdapter and TCallbackPageStateTracker class file.
+ *
+ * @author Wei Zhuo <weizhuo[at]gamil[dot]com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright &copy; 2005-2014 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @package System.Web.UI.ActiveControls
+ */
+
+/**
+ * TScalarDiff class.
+ *
+ * Calculate the changes to a scalar value.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @package System.Web.UI.ActiveControls
+ * @since 3.1
+ */
+class TScalarDiff extends TViewStateDiff
+{
+	/**
+	 * @return mixed update viewstate value.
+	 */
+	public function getDifference()
+	{
+		if(gettype($this->_new) === gettype($this->_old)
+			&& $this->_new === $this->_old)
+			return $this->_null;
+		else
+			return $this->_new;
+	}
+}
+\ No newline at end of file