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File: Visitor.php

<?php

/**
 * Visitor
 *
 * @package Less
 * @subpackage visitor
 */
class Less_Visitor {

	protected $methods = array();
	protected $_visitFnCache = array();

	public function __construct() {
		$this->_visitFnCache = get_class_methods( get_class( $this ) );
		$this->_visitFnCache = array_flip( $this->_visitFnCache );
	}

	public function visitObj( $node ) {
		$funcName = 'visit'.$node->type;
		if ( isset( $this->_visitFnCache[$funcName] ) ) {

			$visitDeeper = true;
			$this->$funcName( $node, $visitDeeper );

			if ( $visitDeeper ) {
				$node->accept( $this );
			}

			$funcName = $funcName . "Out";
			if ( isset( $this->_visitFnCache[$funcName] ) ) {
				$this->$funcName( $node );
			}

		} else {
			$node->accept( $this );
		}

		return $node;
	}

	public function visitArray( $nodes ) {
		array_map( array( $this,'visitObj' ), $nodes );
		return $nodes;
	}
}