1<?php 2 3/* 4 * This file is part of the league/commonmark package. 5 * 6 * (c) Colin O'Dell <colinodell@gmail.com> 7 * (c) Rezo Zero / Ambroise Maupate 8 * 9 * For the full copyright and license information, please view the LICENSE 10 * file that was distributed with this source code. 11 */ 12 13declare(strict_types=1); 14 15namespace League\CommonMark\Extension\Footnote\Parser; 16 17use League\CommonMark\Extension\Footnote\Node\FootnoteRef; 18use League\CommonMark\Inline\Parser\InlineParserInterface; 19use League\CommonMark\InlineParserContext; 20use League\CommonMark\Reference\Reference; 21use League\CommonMark\Util\ConfigurationAwareInterface; 22use League\CommonMark\Util\ConfigurationInterface; 23 24final class FootnoteRefParser implements InlineParserInterface, ConfigurationAwareInterface 25{ 26 /** @var ConfigurationInterface */ 27 private $config; 28 29 public function getCharacters(): array 30 { 31 return ['[']; 32 } 33 34 public function parse(InlineParserContext $inlineContext): bool 35 { 36 $container = $inlineContext->getContainer(); 37 $cursor = $inlineContext->getCursor(); 38 $nextChar = $cursor->peek(); 39 if ($nextChar !== '^') { 40 return false; 41 } 42 43 $state = $cursor->saveState(); 44 45 $m = $cursor->match('#\[\^([^\]]+)\]#'); 46 if ($m !== null) { 47 if (\preg_match('#\[\^([^\]]+)\]#', $m, $matches) > 0) { 48 $container->appendChild(new FootnoteRef($this->createReference($matches[1]))); 49 50 return true; 51 } 52 } 53 54 $cursor->restoreState($state); 55 56 return false; 57 } 58 59 private function createReference(string $label): Reference 60 { 61 return new Reference( 62 $label, 63 '#' . $this->config->get('footnote/footnote_id_prefix', 'fn:') . $label, 64 $label 65 ); 66 } 67 68 public function setConfiguration(ConfigurationInterface $config): void 69 { 70 $this->config = $config; 71 } 72} 73