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<?php |
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/* |
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* This file is part of the league/commonmark package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* |
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* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js) |
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* - (c) John MacFarlane |
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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 League\CommonMark\Block\Parser; |
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use League\CommonMark\Block\Element\Heading; |
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use League\CommonMark\Block\Element\Paragraph; |
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use League\CommonMark\ContextInterface; |
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use League\CommonMark\Cursor; |
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use League\CommonMark\ReferenceParser; |
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use League\CommonMark\Util\RegexHelper; |
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class SetExtHeadingParser implements BlockParserInterface |
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{ |
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/** |
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* @param ContextInterface $context |
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* @param Cursor $cursor |
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* |
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* @return bool |
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*/ |
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1833 |
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public function parse(ContextInterface $context, Cursor $cursor): bool |
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{ |
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1833 |
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if ($cursor->isIndented()) { |
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return false; |
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} |
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1776 |
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if (!($context->getContainer() instanceof Paragraph)) { |
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return false; |
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} |
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333 |
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$match = RegexHelper::matchAll('/^(?:=+|-+)[ \t]*$/', $cursor->getLine(), $cursor->getNextNonSpacePosition()); |
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333 |
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if ($match === null) { |
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return false; |
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} |
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$level = $match[0][0] === '=' ? 1 : 2; |
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$strings = $context->getContainer()->getStrings(); |
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$strings = $this->resolveReferenceLinkDefinitions($strings, $cursor->getEncoding(), $context->getReferenceParser()); |
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if (empty($strings)) { |
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return false; |
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} |
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$context->replaceContainerBlock(new Heading($level, $strings)); |
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return true; |
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} |
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/** |
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* Resolve reference link definition |
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* |
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* @see https://github.com/commonmark/commonmark.js/commit/993bbe335931af847460effa99b2411eb643577d |
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* |
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* @param string[] $strings |
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* @param string $encoding |
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* @param ReferenceParser $referenceParser |
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* |
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* @return string[] |
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*/ |
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private function resolveReferenceLinkDefinitions(array $strings, string $encoding, ReferenceParser $referenceParser): array |
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{ |
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foreach ($strings as &$string) { |
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$cursor = new Cursor($string, $encoding); |
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while ($cursor->getCharacter() === '[' && $referenceParser->parse($cursor)) { |
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$string = $cursor->getRemainder(); |
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} |
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if ($string !== '') { |
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break; |
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} |
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} |
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return \array_filter($strings, function ($s) { |
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return $s !== ''; |
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}); |
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} |
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} |
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thephpleague /
commonmark
