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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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* 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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declare(strict_types=1); |
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namespace League\CommonMark\Extension\DescriptionList\Parser; |
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use League\CommonMark\Extension\DescriptionList\Node\Description; |
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use League\CommonMark\Node\Block\Paragraph; |
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use League\CommonMark\Parser\Block\BlockStart; |
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use League\CommonMark\Parser\Block\BlockStartParserInterface; |
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use League\CommonMark\Parser\Cursor; |
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use League\CommonMark\Parser\MarkdownParserStateInterface; |
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final class DescriptionStartParser implements BlockStartParserInterface |
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{ |
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public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart |
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{ |
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if ($cursor->isIndented()) { |
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return BlockStart::none(); |
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} |
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$cursor->advanceToNextNonSpaceOrTab(); |
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if ($cursor->match('/:[ \t]+/') === null) { |
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return BlockStart::none(); |
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} |
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$terms = $parserState->getParagraphContent(); |
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$activeBlock = $parserState->getActiveBlockParser()->getBlock(); |
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if ($terms !== null && $terms !== '') { |
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// New description; tight; term(s) sitting in pending block that we will replace |
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return BlockStart::of(...[new DescriptionListContinueParser()], ...self::splitTerms($terms), ...[new DescriptionContinueParser(true, $cursor->getPosition())]) |
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->at($cursor) |
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->replaceActiveBlockParser(); |
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} |
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if ($activeBlock instanceof Paragraph && $activeBlock->parent() instanceof Description) { |
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// Additional description in the same list as the parent description |
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return BlockStart::of(new DescriptionContinueParser(true, $cursor->getPosition()))->at($cursor); |
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} |
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if ($activeBlock->lastChild() instanceof Paragraph) { |
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// New description; loose; term(s) sitting in previous closed paragraph block |
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return BlockStart::of(new DescriptionContinueParser(false, $cursor->getPosition()))->at($cursor); |
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} |
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// No preceding terms |
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return BlockStart::none(); |
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} |
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/** |
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* @return array<int, DescriptionTermContinueParser> |
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*/ |
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private static function splitTerms(string $terms): array |
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{ |
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$ret = []; |
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foreach (\explode("\n", $terms) as $term) { |
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$ret[] = new DescriptionTermContinueParser($term); |
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} |
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return $ret; |
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} |
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} |
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thephpleague /
commonmark
