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Revision Autor Zeilennr. Zeile
148 lars 1 
<?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;
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/**
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 * CSS selector reader.
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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 Reader
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{
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    private string $source;
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    private int $length;
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    private int $position = 0;
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    public function __construct(string $source)
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    {
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        $this->source = $source;
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        $this->length = \strlen($source);
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    }
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    public function isEOF(): bool
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    {
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        return $this->position >= $this->length;
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    }
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    public function getPosition(): int
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    {
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        return $this->position;
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    }
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    public function getRemainingLength(): int
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    {
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        return $this->length - $this->position;
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    }
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    public function getSubstring(int $length, int $offset = 0): string
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    {
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        return substr($this->source, $this->position + $offset, $length);
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    }
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    public function getOffset(string $string)
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    {
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        $position = strpos($this->source, $string, $this->position);
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        return false === $position ? false : $position - $this->position;
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    }
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    public function findPattern(string $pattern): array|false
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    {
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        $source = substr($this->source, $this->position);
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        if (preg_match($pattern, $source, $matches)) {
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            return $matches;
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        }
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        return false;
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    }
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    public function moveForward(int $length)
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    {
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        $this->position += $length;
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    }
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    public function moveToEnd()
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    {
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        $this->position = $this->length;
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    }
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}