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Edit File : CssSelectorConverter.php \| Size : 2.10 KB
<?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; use Symfony\Component\CssSelector\Parser\Shortcut\ClassParser; use Symfony\Component\CssSelector\Parser\Shortcut\ElementParser; use Symfony\Component\CssSelector\Parser\Shortcut\EmptyStringParser; use Symfony\Component\CssSelector\Parser\Shortcut\HashParser; use Symfony\Component\CssSelector\XPath\Extension\HtmlExtension; use Symfony\Component\CssSelector\XPath\Translator; /* * CssSelectorConverter is the main entry point of the component and can convert CSS * selectors to XPath expressions. * * @author Christophe Coevoet <stof@notk.org> / class CssSelectorConverter { private $translator; private $cache; private static $xmlCache = []; private static $htmlCache = []; /* * @param bool $html Whether HTML support should be enabled. Disable it for XML documents / public function __construct(bool $html = true) { $this->translator = new Translator(); if ($html) { $this->translator->registerExtension(new HtmlExtension($this->translator)); $this->cache = &self::$htmlCache; } else { $this->cache = &self::$xmlCache; } $this->translator ->registerParserShortcut(new EmptyStringParser()) ->registerParserShortcut(new ElementParser()) ->registerParserShortcut(new ClassParser()) ->registerParserShortcut(new HashParser()) ; } /* * Translates a CSS expression to its XPath equivalent. * * Optionally, a prefix can be added to the resulting XPath * expression with the $prefix parameter. * * @return string */ public function toXPath(string $cssExpr, string $prefix = 'descendant-or-self::') { return $this->cache[$prefix][$cssExpr] ?? $this->cache[$prefix][$cssExpr] = $this->translator->cssToXPath($cssExpr, $prefix); } } Back

Edit File : CssSelectorConverter.php | Size : 2.10 KB

<?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;

use Symfony\Component\CssSelector\Parser\Shortcut\ClassParser;
use Symfony\Component\CssSelector\Parser\Shortcut\ElementParser;
use Symfony\Component\CssSelector\Parser\Shortcut\EmptyStringParser;
use Symfony\Component\CssSelector\Parser\Shortcut\HashParser;
use Symfony\Component\CssSelector\XPath\Extension\HtmlExtension;
use Symfony\Component\CssSelector\XPath\Translator;

/**
 * CssSelectorConverter is the main entry point of the component and can convert CSS
 * selectors to XPath expressions.
 *
 * @author Christophe Coevoet <stof@notk.org>
 */
class CssSelectorConverter
{
    private $translator;
    private $cache;

private static $xmlCache = [];
    private static $htmlCache = [];

/**
     * @param bool $html Whether HTML support should be enabled. Disable it for XML documents
     */
    public function __construct(bool $html = true)
    {
        $this->translator = new Translator();

if ($html) {
            $this->translator->registerExtension(new HtmlExtension($this->translator));
            $this->cache = &self::$htmlCache;
        } else {
            $this->cache = &self::$xmlCache;
        }

$this->translator
            ->registerParserShortcut(new EmptyStringParser())
            ->registerParserShortcut(new ElementParser())
            ->registerParserShortcut(new ClassParser())
            ->registerParserShortcut(new HashParser())
        ;
    }

/**
     * Translates a CSS expression to its XPath equivalent.
     *
     * Optionally, a prefix can be added to the resulting XPath
     * expression with the $prefix parameter.
     *
     * @return string
     */
    public function toXPath(string $cssExpr, string $prefix = 'descendant-or-self::')
    {
        return $this->cache[$prefix][$cssExpr] ?? $this->cache[$prefix][$cssExpr] = $this->translator->cssToXPath($cssExpr, $prefix);
    }
}

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