126 lines
2.3 KiB
PHP
126 lines
2.3 KiB
PHP
<?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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/**
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* @var string
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*/
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private $source;
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/**
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* @var int
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*/
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private $length;
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/**
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* @var int
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*/
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private $position = 0;
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/**
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* @param string $source
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*/
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public function __construct($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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/**
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* @return bool
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*/
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public function isEOF()
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{
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return $this->position >= $this->length;
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}
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/**
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* @return int
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*/
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public function getPosition()
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{
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return $this->position;
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}
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/**
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* @return int
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*/
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public function getRemainingLength()
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{
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return $this->length - $this->position;
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}
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/**
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* @param int $length
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* @param int $offset
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*
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* @return string
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*/
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public function getSubstring($length, $offset = 0)
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{
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return substr($this->source, $this->position + $offset, $length);
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}
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/**
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* @param string $string
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*
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* @return int
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*/
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public function getOffset($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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/**
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* @param string $pattern
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*
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* @return bool
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*/
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public function findPattern($pattern)
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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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/**
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* @param int $length
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*/
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public function moveForward($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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}
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