Viewing file:  StaggeredDelimiterProcessor.php (3.34 KB) -rwxrwxr-x
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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>
*
* Additional emphasis processing code based on commonmark-java (https://github.com/atlassian/commonmark-java)
* - (c) Atlassian Pty Ltd
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Delimiter\Processor;
use League\CommonMark\Delimiter\DelimiterInterface;
use League\CommonMark\Node\Inline\AbstractStringContainer;
/**
* An implementation of DelimiterProcessorInterface that dispatches all calls to two or more other DelimiterProcessors
* depending on the length of the delimiter run. All child DelimiterProcessors must have different minimum
* lengths. A given delimiter run is dispatched to the child with the largest acceptable minimum length. If no
* child is applicable, the one with the largest minimum length is chosen.
*
* @internal
*/
final class StaggeredDelimiterProcessor implements DelimiterProcessorInterface
{
/** @psalm-readonly */
private string $delimiterChar;
/** @psalm-readonly-allow-private-mutation */
private int $minLength = 0;
/**
* @var array<int, DelimiterProcessorInterface>|DelimiterProcessorInterface[]
*
* @psalm-readonly-allow-private-mutation
*/
private array $processors = []; // keyed by minLength in reverse order
public function __construct(string $char, DelimiterProcessorInterface $processor)
{
$this->delimiterChar = $char;
$this->add($processor);
}
public function getOpeningCharacter(): string
{
return $this->delimiterChar;
}
public function getClosingCharacter(): string
{
return $this->delimiterChar;
}
public function getMinLength(): int
{
return $this->minLength;
}
/**
* Adds the given processor to this staggered delimiter processor
*/
public function add(DelimiterProcessorInterface $processor): void
{
$len = $processor->getMinLength();
if (isset($this->processors[$len])) {
throw new \InvalidArgumentException(\sprintf('Cannot add two delimiter processors for char "%s" and minimum length %d', $this->delimiterChar, $len));
}
$this->processors[$len] = $processor;
\krsort($this->processors);
$this->minLength = \min($this->minLength, $len);
}
public function getDelimiterUse(DelimiterInterface $opener, DelimiterInterface $closer): int
{
return $this->findProcessor($opener->getLength())->getDelimiterUse($opener, $closer);
}
public function process(AbstractStringContainer $opener, AbstractStringContainer $closer, int $delimiterUse): void
{
$this->findProcessor($delimiterUse)->process($opener, $closer, $delimiterUse);
}
private function findProcessor(int $len): DelimiterProcessorInterface
{
// Find the "longest" processor which can handle this length
foreach ($this->processors as $processor) {
if ($processor->getMinLength() <= $len) {
return $processor;
}
}
// Just use the first one in our list
$first = \reset($this->processors);
\assert($first instanceof DelimiterProcessorInterface);
return $first;
}
}
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