140 lines
4.3 KiB
PHP
140 lines
4.3 KiB
PHP
<?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 <colinodell@gmail.com>
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* (c) 2015 Martin Hasoň <martin.hason@gmail.com>
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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\Attributes\Event;
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use League\CommonMark\Event\DocumentParsedEvent;
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use League\CommonMark\Extension\Attributes\Node\Attributes;
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use League\CommonMark\Extension\Attributes\Node\AttributesInline;
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use League\CommonMark\Extension\Attributes\Util\AttributesHelper;
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use League\CommonMark\Extension\CommonMark\Node\Block\FencedCode;
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use League\CommonMark\Extension\CommonMark\Node\Block\ListBlock;
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use League\CommonMark\Extension\CommonMark\Node\Block\ListItem;
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use League\CommonMark\Node\Inline\AbstractInline;
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use League\CommonMark\Node\Node;
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final class AttributesListener
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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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public function processDocument(DocumentParsedEvent $event): void
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{
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foreach ($event->getDocument()->iterator() as $node) {
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if (! ($node instanceof Attributes || $node instanceof AttributesInline)) {
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continue;
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}
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[$target, $direction] = self::findTargetAndDirection($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 = $parent;
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}
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if ($direction === self::DIRECTION_SUFFIX) {
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$attributes = AttributesHelper::mergeAttributes($target, $node->getAttributes());
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} else {
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$attributes = AttributesHelper::mergeAttributes($node->getAttributes(), $target);
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}
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$target->data->set('attributes', $attributes);
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}
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$node->detach();
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}
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}
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/**
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* @param Attributes|AttributesInline $node
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*
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* @return array<Node|string|null>
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*/
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private static function findTargetAndDirection($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 = self::getPrevious($previous);
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$next = self::getNext($next);
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if ($previous === null && $next === null) {
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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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if ($node instanceof AttributesInline && ($previous === null || ($previous instanceof AbstractInline && $node->isBlock()))) {
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continue;
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}
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if ($previous !== null && ! self::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 ($next !== null && ! self::isAttributesNode($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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/**
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* Get any previous block (sibling or parent) this might apply to
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*/
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private static function getPrevious(?Node $node = null): ?Node
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{
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if ($node instanceof Attributes) {
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if ($node->getTarget() === Attributes::TARGET_NEXT) {
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return null;
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}
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if ($node->getTarget() === Attributes::TARGET_PARENT) {
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return $node->parent();
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}
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}
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return $node instanceof Node ? $node->previous() : null;
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}
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/**
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* Get any previous block (sibling or parent) this might apply to
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*/
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private static function getNext(?Node $node = null): ?Node
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{
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if ($node instanceof Attributes && $node->getTarget() !== Attributes::TARGET_NEXT) {
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return null;
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}
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return $node instanceof Node ? $node->next() : null;
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}
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private static 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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