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