<?php

/*

 * This file is part of the Symfony package.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Symfony\Component\CssSelector\Node;

use Symfony\Component\CssSelector\XPathExpr;

/**

 * ElementNode represents a "namespace|element" node.

 *

 * This component is a port of the Python lxml library,

 * which is copyright Infrae and distributed under the BSD license.

 *

 * @author Fabien Potencier <fabien@symfony.com>

 */

class ElementNode implements NodeInterface

{

    protected $namespace;

    protected $element;

    /**

     * Constructor.

     *

     * @param string $namespace Namespace

     * @param string $element Element

     */

    public function __construct($namespace, $element)

    {

        $this->namespace = $namespace;

        $this->element = $element;

    }

    /**

     * {@inheritDoc}

     */

    public function __toString()

    {

        return sprintf('%s[%s]', __CLASS__, $this->formatElement());

    }

    /**

     * Formats the element into a string.

     *

     * @return string Element as an XPath string

     */

    public function formatElement()

    {

        if ($this->namespace == '*') {

            return $this->element;

        }

        return sprintf('%s|%s', $this->namespace, $this->element);

    }

    /**

     * {@inheritDoc}

     */

    public function toXpath()

    {

        if ($this->namespace == '*') {

            $el = strtolower($this->element);

        } else {

            // FIXME: Should we lowercase here?

            $el = sprintf('%s:%s', $this->namespace, $this->element);

        }

        return new XPathExpr(null, null, $el);

    }

}