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<?php
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declare(strict_types=1);
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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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*
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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\Extension\CommonMark\Parser\Block;
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use League\CommonMark\Extension\CommonMark\Node\Block\ListBlock;
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use League\CommonMark\Extension\CommonMark\Node\Block\ListData;
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use League\CommonMark\Extension\CommonMark\Node\Block\ListItem;
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use League\CommonMark\Node\Block\AbstractBlock;
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use League\CommonMark\Parser\Block\AbstractBlockContinueParser;
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use League\CommonMark\Parser\Block\BlockContinue;
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use League\CommonMark\Parser\Block\BlockContinueParserInterface;
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use League\CommonMark\Parser\Cursor;
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final class ListBlockParser extends AbstractBlockContinueParser
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{
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/** @psalm-readonly */
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private ListBlock $block;
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private bool $hadBlankLine = false;
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private int $linesAfterBlank = 0;
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public function __construct(ListData $listData)
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{
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$this->block = new ListBlock($listData);
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}
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public function getBlock(): ListBlock
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{
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return $this->block;
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}
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public function isContainer(): bool
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{
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return true;
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}
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public function canContain(AbstractBlock $childBlock): bool
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{
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if (! $childBlock instanceof ListItem) {
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return false;
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}
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// Another list item is being added to this list block.
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// If the previous line was blank, that means this list
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// block is "loose" (not tight).
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if ($this->hadBlankLine && $this->linesAfterBlank === 1) {
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$this->block->setTight(false);
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$this->hadBlankLine = false;
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}
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return true;
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}
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public function tryContinue(Cursor $cursor, BlockContinueParserInterface $activeBlockParser): ?BlockContinue
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{
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if ($cursor->isBlank()) {
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$this->hadBlankLine = true;
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$this->linesAfterBlank = 0;
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} elseif ($this->hadBlankLine) {
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$this->linesAfterBlank++;
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}
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// List blocks themselves don't have any markers, only list items. So try to stay in the list.
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// If there is a block start other than list item, canContain makes sure that this list is closed.
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return BlockContinue::at($cursor);
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}
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}
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