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- <?php
-
- /*
- * This file is part of the league/commonmark package.
- *
- * (c) Colin O'Dell <colinodell@gmail.com>
- * (c) Rezo Zero / Ambroise Maupate
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
- declare(strict_types=1);
-
- namespace League\CommonMark\Extension\Footnote\Event;
-
- use League\CommonMark\Block\Element\Document;
- use League\CommonMark\Event\DocumentParsedEvent;
- use League\CommonMark\Extension\Footnote\Node\Footnote;
- use League\CommonMark\Extension\Footnote\Node\FootnoteBackref;
- use League\CommonMark\Extension\Footnote\Node\FootnoteContainer;
- use League\CommonMark\Reference\Reference;
- use League\CommonMark\Util\ConfigurationAwareInterface;
- use League\CommonMark\Util\ConfigurationInterface;
-
- final class GatherFootnotesListener implements ConfigurationAwareInterface
- {
- /** @var ConfigurationInterface */
- private $config;
-
- public function onDocumentParsed(DocumentParsedEvent $event): void
- {
- $document = $event->getDocument();
- $walker = $document->walker();
-
- $footnotes = [];
- while ($event = $walker->next()) {
- if (!$event->isEntering()) {
- continue;
- }
-
- $node = $event->getNode();
- if (!$node instanceof Footnote) {
- continue;
- }
-
- // Look for existing reference with footnote label
- $ref = $document->getReferenceMap()->getReference($node->getReference()->getLabel());
- if ($ref !== null) {
- // Use numeric title to get footnotes order
- $footnotes[\intval($ref->getTitle())] = $node;
- } else {
- // Footnote call is missing, append footnote at the end
- $footnotes[INF] = $node;
- }
-
- /*
- * Look for all footnote refs pointing to this footnote
- * and create each footnote backrefs.
- */
- $backrefs = $document->getData(
- '#' . $this->config->get('footnote/footnote_id_prefix', 'fn:') . $node->getReference()->getDestination(),
- []
- );
- /** @var Reference $backref */
- foreach ($backrefs as $backref) {
- $node->addBackref(new FootnoteBackref(new Reference(
- $backref->getLabel(),
- '#' . $this->config->get('footnote/ref_id_prefix', 'fnref:') . $backref->getLabel(),
- $backref->getTitle()
- )));
- }
- }
-
- // Only add a footnote container if there are any
- if (\count($footnotes) === 0) {
- return;
- }
-
- $container = $this->getFootnotesContainer($document);
-
- \ksort($footnotes);
- foreach ($footnotes as $footnote) {
- $container->appendChild($footnote);
- }
- }
-
- private function getFootnotesContainer(Document $document): FootnoteContainer
- {
- $footnoteContainer = new FootnoteContainer();
- $document->appendChild($footnoteContainer);
-
- return $footnoteContainer;
- }
-
- public function setConfiguration(ConfigurationInterface $config): void
- {
- $this->config = $config;
- }
- }