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<?php
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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 <fabien@symfony.com>
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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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namespace Symfony\Component\CssSelector\Parser\Tokenizer;
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use Symfony\Component\CssSelector\Parser\Handler;
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use Symfony\Component\CssSelector\Parser\Reader;
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use Symfony\Component\CssSelector\Parser\Token;
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use Symfony\Component\CssSelector\Parser\TokenStream;
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/**
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* CSS selector tokenizer.
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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 <jeanfrancois.simon@sensiolabs.com>
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*
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* @internal
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*/
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class Tokenizer
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{
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/**
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* @var Handler\HandlerInterface[]
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*/
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private array $handlers;
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public function __construct()
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{
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$patterns = new TokenizerPatterns();
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$escaping = new TokenizerEscaping($patterns);
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$this->handlers = [
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new Handler\WhitespaceHandler(),
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new Handler\IdentifierHandler($patterns, $escaping),
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new Handler\HashHandler($patterns, $escaping),
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new Handler\StringHandler($patterns, $escaping),
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new Handler\NumberHandler($patterns),
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new Handler\CommentHandler(),
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];
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}
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/**
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* Tokenize selector source code.
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*/
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public function tokenize(Reader $reader): TokenStream
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{
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$stream = new TokenStream();
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while (!$reader->isEOF()) {
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foreach ($this->handlers as $handler) {
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if ($handler->handle($reader, $stream)) {
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continue 2;
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}
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}
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$stream->push(new Token(Token::TYPE_DELIMITER, $reader->getSubstring(1), $reader->getPosition()));
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$reader->moveForward(1);
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}
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return $stream
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->push(new Token(Token::TYPE_FILE_END, null, $reader->getPosition()))
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->freeze();
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}
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}
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