<?php
/*
 *  OPEN POWER LIBS <http://www.invenzzia.org>
 *
 * This file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE. It is also available through
 * WWW at this URL: <http://www.invenzzia.org/license/new-bsd>
 *
 * Copyright (c) Invenzzia Group <http://www.invenzzia.org>
 * and other contributors. See website for details.
 *
 */

	class Opt_Instruction_Dynamic extends Opt_Compiler_Processor
	{
		protected $_name = 'dynamic';
		
		public function configure()
		{
			$this->_addInstructions(array('opt:dynamic'));
			$this->_addAttributes(array('opt:dynamic'));
		} // end configure();
	
		public function processNode(Opt_Xml_Node $node)
		{
			$node->addBefore(Opt_Xml_Buffer::TAG_BEFORE, ' if($this->_tpl->getBufferState(\'cache\')) { $this->_outputBuffer[] = ob_get_flush(); }');
			$node->addAfter(Opt_Xml_Buffer::TAG_AFTER, ' if($this->_tpl->getBufferState(\'cache\')) { ob_start(); } ');

			// We do not want to capture the output buffering in the dynamic block, so we
			// must copy the contents to a fake sub-node and set the "dynamic" flag to it.
			$turboNode = new Opt_Xml_Element('opt:_');
			$turboNode->moveChildren($node);
			$node->appendChild($turboNode);

			$turboNode->set('hidden', false);
			$turboNode->set('dynamic', true);
			$this->_process($turboNode);
		} // end processNode();

		public function processAttribute(Opt_Xml_Node $node, Opt_Xml_Attribute $attr)
		{
			// TODO: The expressions in the dynamic part do not work. Fix.
			if($attr == 'yes')
			{
				$turboNode = new Opt_Xml_Element('opt:_');
				$turboNode->set('hidden', false);
				$turboNode->addBefore(Opt_Xml_Buffer::TAG_BEFORE, ' if($this->_tpl->getBufferState(\'cache\')) { $this->_outputBuffer[] = ob_get_flush(); }');
				$turboNode->addAfter(Opt_Xml_Buffer::TAG_AFTER, ' if($this->_tpl->getBufferState(\'cache\')) { ob_start(); } ');

				$node->getParent()->replaceChild($turboNode, $node);
				$node->set('dynamic', true);
				$turboNode->appendChild($node);
			}
		} // end processAttribute();
	} // end Opt_Instruction_Dynamic;