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<?php |
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|
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/* |
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* This file is part of the Symfony package. |
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* |
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* (c) Fabien Potencier <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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|
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namespace Symfony\Component\CssSelector\Parser\Tokenizer; |
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|
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/** |
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* CSS selector tokenizer patterns builder. |
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* |
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* This component is a port of the Python cssselect library, |
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* which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect. |
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* |
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* @author Jean-François Simon <[email protected]> |
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* |
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* @internal |
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*/ |
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class TokenizerPatterns |
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{ |
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private $unicodeEscapePattern; |
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private $simpleEscapePattern; |
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private $newLineEscapePattern; |
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private $escapePattern; |
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private $stringEscapePattern; |
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private $nonAsciiPattern; |
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private $nmCharPattern; |
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private $nmStartPattern; |
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private $identifierPattern; |
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private $hashPattern; |
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private $numberPattern; |
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private $quotedStringPattern; |
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|
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public function __construct() |
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{ |
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$this->unicodeEscapePattern = '\\\\([0-9a-f]{1,6})(?:\r\n|[ \n\r\t\f])?'; |
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$this->simpleEscapePattern = '\\\\(.)'; |
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$this->newLineEscapePattern = '\\\\(?:\n|\r\n|\r|\f)'; |
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$this->escapePattern = $this->unicodeEscapePattern.'|\\\\[^\n\r\f0-9a-f]'; |
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$this->stringEscapePattern = $this->newLineEscapePattern.'|'.$this->escapePattern; |
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$this->nonAsciiPattern = '[^\x00-\x7F]'; |
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$this->nmCharPattern = '[_a-z0-9-]|'.$this->escapePattern.'|'.$this->nonAsciiPattern; |
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$this->nmStartPattern = '[_a-z]|'.$this->escapePattern.'|'.$this->nonAsciiPattern; |
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$this->identifierPattern = '-?(?:'.$this->nmStartPattern.')(?:'.$this->nmCharPattern.')*'; |
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$this->hashPattern = '#((?:'.$this->nmCharPattern.')+)'; |
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$this->numberPattern = '[+-]?(?:[0-9]*\.[0-9]+|[0-9]+)'; |
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$this->quotedStringPattern = '([^\n\r\f\\\\%s]|'.$this->stringEscapePattern.')*'; |
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} |
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|
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public function getNewLineEscapePattern(): string |
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{ |
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return '~'.$this->newLineEscapePattern.'~'; |
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} |
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|
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public function getSimpleEscapePattern(): string |
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{ |
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return '~'.$this->simpleEscapePattern.'~'; |
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} |
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|
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public function getUnicodeEscapePattern(): string |
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{ |
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return '~'.$this->unicodeEscapePattern.'~i'; |
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} |
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|
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public function getIdentifierPattern(): string |
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{ |
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return '~^'.$this->identifierPattern.'~i'; |
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} |
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|
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public function getHashPattern(): string |
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{ |
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return '~^'.$this->hashPattern.'~i'; |
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} |
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|
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public function getNumberPattern(): string |
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{ |
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return '~^'.$this->numberPattern.'~'; |
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} |
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|
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public function getQuotedStringPattern(string $quote): string |
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{ |
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return '~^'.sprintf($this->quotedStringPattern, $quote).'~i'; |
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} |
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} |
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