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<?php |
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declare(strict_types=1); |
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/* |
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* This is part of the webuni/commonmark-attributes-extension package. |
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* |
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* (c) Martin Hasoň <[email protected]> |
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* (c) Webuni s.r.o. <[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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namespace Webuni\CommonMark\AttributesExtension; |
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use League\CommonMark\Block\Element\AbstractBlock; |
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use League\CommonMark\Block\Element\Document; |
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use League\CommonMark\Block\Element\FencedCode; |
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use League\CommonMark\Block\Element\ListBlock; |
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use League\CommonMark\Block\Element\ListItem; |
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use League\CommonMark\Inline\Element\AbstractInline; |
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use League\CommonMark\Node\Node; |
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final class AttributesProcessor |
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{ |
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private const DIRECTION_PREFIX = 'prefix'; |
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private const DIRECTION_SUFFIX = 'suffix'; |
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5 |
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public function processDocument(Document $document): void |
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{ |
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$walker = $document->walker(); |
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while ($event = $walker->next()) { |
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$node = $event->getNode(); |
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if (!$node instanceof AttributesInline && ($event->isEntering() || !$node instanceof Attributes)) { |
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continue; |
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} |
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list($target, $direction) = $this->findTargetAndDirection($node); |
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if ($target instanceof Node) { |
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$parent = $target->parent(); |
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if ($parent instanceof ListItem && $parent->parent() instanceof ListBlock && $parent->parent()->isTight()) { |
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$target = $parent; |
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} |
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if (self::DIRECTION_SUFFIX === $direction) { |
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$attributes = AttributesUtils::merge($target, $node->getAttributes()); |
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} else { |
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$attributes = AttributesUtils::merge($node->getAttributes(), $target); |
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} |
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if ($target instanceof AbstractBlock || $target instanceof AbstractInline) { |
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$target->data['attributes'] = $attributes; |
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} |
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} |
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if ($node instanceof AbstractBlock && $node->endsWithBlankLine() && $node->next() && $node->previous()) { |
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$previous = $node->previous(); |
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if ($previous instanceof AbstractBlock) { |
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$previous->setLastLineBlank(true); |
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} |
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} |
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$node->detach(); |
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} |
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} |
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private function findTargetAndDirection(Node $node): array |
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{ |
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$target = null; |
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$direction = null; |
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$previous = $next = $node; |
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while (true) { |
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$previous = $this->getPrevious($previous); |
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$next = $this->getNext($next); |
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if (null === $previous && null === $next) { |
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if (!$node->parent() instanceof FencedCode) { |
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$target = $node->parent(); |
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$direction = self::DIRECTION_SUFFIX; |
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} |
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break; |
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} |
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3 |
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if ($node instanceof AttributesInline && (null === $previous || ($previous instanceof AbstractInline && $node->isBlock()))) { |
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continue; |
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} |
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if (null !== $previous && !$this->isAttributesNode($previous)) { |
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$target = $previous; |
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$direction = self::DIRECTION_SUFFIX; |
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break; |
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} |
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if (null !== $next && !$this->isAttributesNode($next)) { |
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$target = $next; |
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$direction = self::DIRECTION_PREFIX; |
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break; |
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} |
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} |
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return [$target, $direction]; |
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} |
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private function getPrevious(Node $node = null): ?Node |
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{ |
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$previous = $node instanceof Node ? $node->previous() : null; |
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if ($previous instanceof AbstractBlock && $previous->endsWithBlankLine()) { |
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$previous = null; |
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} |
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return $previous; |
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} |
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private function getNext(Node $node = null): ?Node |
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{ |
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$next = $node instanceof Node ? $node->next() : null; |
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if ($node instanceof AbstractBlock && $node->endsWithBlankLine()) { |
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$next = null; |
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} |
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return $next; |
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} |
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private function isAttributesNode(Node $node): bool |
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{ |
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return $node instanceof Attributes || $node instanceof AttributesInline; |
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} |
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} |
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webuni /
commonmark-attributes-extension
