1 files changed, 40 insertions, 0 deletions
diff --git a/framework/Web/UI/ActiveControls/TMapCollectionDiff.php b/framework/Web/UI/ActiveControls/TMapCollectionDiff.php
new file mode 100644
index 00000000..ff8a4dfe
--- /dev/null
+++ b/framework/Web/UI/ActiveControls/TMapCollectionDiff.php
@@ -0,0 +1,40 @@
+<?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
+ */
+
+/**
+ * TMapCollectionDiff class.
+ *
+ * Calculate the changes to attributes collection.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @package System.Web.UI.ActiveControls
+ * @since 3.1
+ */
+class TMapCollectionDiff extends TViewStateDiff
+{
+	/**
+	 * @return array updates to the attributes collection.
+	 */
+	public function getDifference()
+	{
+		if($this->_old===null)
+		{
+			return ($this->_new!==null) ? $this->_new->toArray() : $this->_null;
+		}
+		else
+		{
+			$new = $this->_new->toArray();
+			$old = $this->_old->toArray();
+			$diff = array_diff_assoc($new, $old);
+			return count($diff) > 0 ? $diff : $this->_null;
+		}
+	}
+}
+\ No newline at end of file