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<?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 <[email protected]> |
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* |
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* Additional emphasis processing code based on commonmark-java (https://github.com/atlassian/commonmark-java) |
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* - (c) Atlassian Pty Ltd |
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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\Delimiter\Processor; |
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use League\CommonMark\Delimiter\Delimiter; |
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use League\CommonMark\Inline\Element\Text; |
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/** |
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* An implementation of DelimiterProcessorInterface that dispatches all calls to two or more other DelimiterProcessors |
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* depending on the length of the delimiter run. All child DelimiterProcessors must have different minimum |
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* lengths. A given delimiter run is dispatched to the child with the largest acceptable minimum length. If no |
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* child is applicable, the one with the largest minimum length is chosen. |
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*/ |
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final class StaggeredDelimiterProcessor implements DelimiterProcessorInterface |
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{ |
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private $delimiterChar; |
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private $minLength = 0; |
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/** @var array<int, DelimiterProcessorInterface>|DelimiterProcessorInterface[] */ |
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private $processors = []; // keyed by minLength in reverse order |
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public function __construct(string $char, DelimiterProcessorInterface $processor) |
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{ |
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$this->delimiterChar = $char; |
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$this->add($processor); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getOpeningCharacter(): string |
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{ |
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return $this->delimiterChar; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getClosingCharacter(): string |
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{ |
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return $this->delimiterChar; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getMinLength(): int |
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{ |
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return $this->minLength; |
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} |
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/** |
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* Adds the given processor to this staggered delimiter processor |
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* |
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* @param DelimiterProcessorInterface $processor |
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*/ |
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public function add(DelimiterProcessorInterface $processor) |
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{ |
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$len = $processor->getMinLength(); |
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if (isset($this->processors[$len])) { |
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throw new \InvalidArgumentException(sprintf('Cannot add two delimiter processors for char "%s" and minimum length %d', $this->delimiterChar, $len)); |
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} |
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$this->processors[$len] = $processor; |
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krsort($this->processors); |
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$this->minLength = min($this->minLength, $len); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getDelimiterUse(Delimiter $opener, Delimiter $closer): int |
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{ |
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return $this->findProcessor($opener->getNumDelims())->getDelimiterUse($opener, $closer); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function process(Text $opener, Text $closer, int $delimiterUse) |
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{ |
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return $this->findProcessor($delimiterUse)->process($opener, $closer, $delimiterUse); |
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} |
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private function findProcessor(int $len): DelimiterProcessorInterface |
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{ |
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// Find the "longest" processor which can handle this length |
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foreach ($this->processors as $processor) { |
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if ($processor->getMinLength() <= $len) { |
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return $processor; |
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} |
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} |
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// Just use the first one in our list |
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/** @var DelimiterProcessorInterface $first */ |
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$first = reset($this->processors); |
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return $first; |
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} |
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} |
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thephpleague /
commonmark
