_test/vendor/symfony/css-selector/Parser/Reader.php

   1 <?php
   2
   3 /*
   4  * This file is part of the Symfony package.
   5  *
   6  * (c) Fabien Potencier <fabien@symfony.com>
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 namespace Symfony\Component\CssSelector\Parser;
  13
  14 /**
  15  * CSS selector reader.
  16  *
  17  * This component is a port of the Python cssselect library,
  18  * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
  19  *
  20  * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
  21  *
  22  * @internal
  23  */
  24 class Reader
  25 {
  26     private $source;
  27     private $length;
  28     private $position = 0;
  29
  30     public function __construct(string $source)
  31     {
  32         $this->source = $source;
  33         $this->length = \strlen($source);
  34     }
  35
  36     public function isEOF(): bool
  37     {
  38         return $this->position >= $this->length;
  39     }
  40
  41     public function getPosition(): int
  42     {
  43         return $this->position;
  44     }
  45
  46     public function getRemainingLength(): int
  47     {
  48         return $this->length - $this->position;
  49     }
  50
  51     public function getSubstring(int $length, int $offset = 0): string
  52     {
  53         return substr($this->source, $this->position + $offset, $length);
  54     }
  55
  56     public function getOffset(string $string)
  57     {
  58         $position = strpos($this->source, $string, $this->position);
  59
  60         return false === $position ? false : $position - $this->position;
  61     }
  62
  63     /**
  64      * @return array|false
  65      */
  66     public function findPattern(string $pattern)
  67     {
  68         $source = substr($this->source, $this->position);
  69
  70         if (preg_match($pattern, $source, $matches)) {
  71             return $matches;
  72         }
  73
  74         return false;
  75     }
  76
  77     public function moveForward(int $length)
  78     {
  79         $this->position += $length;
  80     }
  81
  82     public function moveToEnd()
  83     {
  84         $this->position = $this->length;
  85     }
  86 }