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libraries/cms/layout/layout.php

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+<?php
+/**
+ * @package     Joomla.Libraries
+ * @subpackage  Layout
+ *
+ * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('JPATH_BASE') or die;
+
+/**
+ * Interface to handle display layout
+ *
+ * @package     Joomla.Libraries
+ * @subpackage  Layout
+ * @see         http://docs.joomla.org/Sharing_layouts_across_views_or_extensions_with_JLayout
+ * @since       3.0
+ */
+interface JLayout
+{
+	/**
+	 * Method to escape output.
+	 *
+	 * @param   string  $output  The output to escape.
+	 *
+	 * @return  string  The escaped output.
+	 *
+	 * @since   3.0
+	 */
+	public function escape($output);
+
+	/**
+	 * Method to render the layout.
+	 *
+	 * @param   object  $displayData  Object which properties are used inside the layout file to build displayed output
+	 *
+	 * @return  string  The rendered layout.
+	 *
+	 * @since   3.0
+	 */
+	public function render($displayData);
+}