--- /dev/null
+<?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\Parser\Tokenizer;
+
+/**
+ * CSS selector tokenizer patterns builder.
+ *
+ * This component is a port of the Python cssselect library,
+ * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
+ *
+ * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
+ *
+ * @internal
+ */
+class TokenizerPatterns
+{
+ /**
+ * @var string
+ */
+ private $unicodeEscapePattern;
+
+ /**
+ * @var string
+ */
+ private $simpleEscapePattern;
+
+ /**
+ * @var string
+ */
+ private $newLineEscapePattern;
+
+ /**
+ * @var string
+ */
+ private $escapePattern;
+
+ /**
+ * @var string
+ */
+ private $stringEscapePattern;
+
+ /**
+ * @var string
+ */
+ private $nonAsciiPattern;
+
+ /**
+ * @var string
+ */
+ private $nmCharPattern;
+
+ /**
+ * @var string
+ */
+ private $nmStartPattern;
+
+ /**
+ * @var string
+ */
+ private $identifierPattern;
+
+ /**
+ * @var string
+ */
+ private $hashPattern;
+
+ /**
+ * @var string
+ */
+ private $numberPattern;
+
+ /**
+ * @var string
+ */
+ private $quotedStringPattern;
+
+ /**
+ * Constructor.
+ */
+ public function __construct()
+ {
+ $this->unicodeEscapePattern = '\\\\([0-9a-f]{1,6})(?:\r\n|[ \n\r\t\f])?';
+ $this->simpleEscapePattern = '\\\\(.)';
+ $this->newLineEscapePattern = '\\\\(?:\n|\r\n|\r|\f)';
+ $this->escapePattern = $this->unicodeEscapePattern.'|\\\\[^\n\r\f0-9a-f]';
+ $this->stringEscapePattern = $this->newLineEscapePattern.'|'.$this->escapePattern;
+ $this->nonAsciiPattern = '[^\x00-\x7F]';
+ $this->nmCharPattern = '[_a-z0-9-]|'.$this->escapePattern.'|'.$this->nonAsciiPattern;
+ $this->nmStartPattern = '[_a-z]|'.$this->escapePattern.'|'.$this->nonAsciiPattern;
+ $this->identifierPattern = '(?:'.$this->nmStartPattern.')(?:'.$this->nmCharPattern.')*';
+ $this->hashPattern = '#((?:'.$this->nmCharPattern.')+)';
+ $this->numberPattern = '[+-]?(?:[0-9]*\.[0-9]+|[0-9]+)';
+ $this->quotedStringPattern = '([^\n\r\f%s]|'.$this->stringEscapePattern.')*';
+ }
+
+ /**
+ * @return string
+ */
+ public function getNewLineEscapePattern()
+ {
+ return '~^'.$this->newLineEscapePattern.'~';
+ }
+
+ /**
+ * @return string
+ */
+ public function getSimpleEscapePattern()
+ {
+ return '~^'.$this->simpleEscapePattern.'~';
+ }
+
+ /**
+ * @return string
+ */
+ public function getUnicodeEscapePattern()
+ {
+ return '~^'.$this->unicodeEscapePattern.'~i';
+ }
+
+ /**
+ * @return string
+ */
+ public function getIdentifierPattern()
+ {
+ return '~^'.$this->identifierPattern.'~i';
+ }
+
+ /**
+ * @return string
+ */
+ public function getHashPattern()
+ {
+ return '~^'.$this->hashPattern.'~i';
+ }
+
+ /**
+ * @return string
+ */
+ public function getNumberPattern()
+ {
+ return '~^'.$this->numberPattern.'~';
+ }
+
+ /**
+ * @param string $quote
+ *
+ * @return string
+ */
+ public function getQuotedStringPattern($quote)
+ {
+ return '~^'.sprintf($this->quotedStringPattern, $quote).'~i';
+ }
+}