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<?php |
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declare(strict_types=1); |
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namespace League\CommonMark\Xml; |
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use League\CommonMark\Environment\EnvironmentInterface; |
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use League\CommonMark\Event\DocumentPreRenderEvent; |
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use League\CommonMark\Node\Block\Document; |
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use League\CommonMark\Node\Node; |
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use League\CommonMark\Node\StringContainerInterface; |
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use League\CommonMark\Output\RenderedContent; |
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use League\CommonMark\Output\RenderedContentInterface; |
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use League\CommonMark\Renderer\MarkdownRendererInterface; |
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use League\CommonMark\Util\Xml; |
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final class XmlRenderer implements MarkdownRendererInterface |
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{ |
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private const INDENTATION = ' '; |
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/** @var EnvironmentInterface */ |
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private $environment; |
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/** @var XmlNodeRendererInterface */ |
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private $fallbackRenderer; |
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/** @var array<class-string, XmlNodeRendererInterface> */ |
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private $rendererCache = []; |
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public function __construct(EnvironmentInterface $environment) |
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{ |
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$this->environment = $environment; |
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$this->fallbackRenderer = new FallbackNodeXmlRenderer(); |
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} |
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public function renderDocument(Document $document): RenderedContentInterface |
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{ |
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$this->environment->dispatch(new DocumentPreRenderEvent($document, 'xml')); |
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$xml = '<?xml version="1.0" encoding="UTF-8"?>'; |
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$indent = 0; |
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$walker = $document->walker(); |
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while ($event = $walker->next()) { |
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$node = $event->getNode(); |
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$closeImmediately = ! $node->hasChildren(); |
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$selfClosing = $closeImmediately && ! $node instanceof StringContainerInterface; |
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$renderer = $this->findXmlRenderer($node); |
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$tagName = $renderer->getXmlTagName($node); |
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if ($event->isEntering()) { |
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$attrs = $renderer->getXmlAttributes($node); |
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$xml .= "\n" . \str_repeat(self::INDENTATION, $indent); |
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$xml .= self::tag($tagName, $attrs, $selfClosing); |
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if ($node instanceof StringContainerInterface) { |
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$xml .= Xml::escape($node->getLiteral()); |
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} |
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if ($closeImmediately && ! $selfClosing) { |
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$xml .= self::tag('/' . $tagName); |
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} |
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if (! $closeImmediately && ! $selfClosing) { |
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$indent++; |
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} |
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} elseif (! $closeImmediately) { |
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$indent--; |
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$xml .= "\n" . \str_repeat(self::INDENTATION, $indent); |
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$xml .= self::tag('/' . $tagName); |
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} |
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} |
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return new RenderedContent($document, $xml . "\n"); |
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} |
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/** |
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* @param array<string, string|int|float|bool> $attrs |
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*/ |
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private static function tag(string $name, array $attrs = [], bool $selfClosing = \false): string |
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{ |
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$result = '<' . $name; |
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foreach ($attrs as $key => $value) { |
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$result .= \sprintf(' %s="%s"', $key, self::convertAndEscape($value)); |
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} |
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if ($selfClosing) { |
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$result .= ' /'; |
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} |
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$result .= '>'; |
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return $result; |
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} |
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/** |
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* @param string|int|float|bool $value |
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*/ |
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private static function convertAndEscape($value): string |
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{ |
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if (\is_string($value)) { |
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return Xml::escape($value); |
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} |
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if (\is_int($value) || \is_float($value)) { |
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return (string) $value; |
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} |
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if (\is_bool($value)) { |
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return $value ? 'true' : 'false'; |
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} |
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// @phpstan-ignore-next-line |
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throw new \InvalidArgumentException('$value must be a string, int, float, or bool'); |
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} |
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private function findXmlRenderer(Node $node): XmlNodeRendererInterface |
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{ |
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$class = \get_class($node); |
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if (\array_key_exists($class, $this->rendererCache)) { |
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return $this->rendererCache[$class]; |
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} |
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foreach ($this->environment->getRenderersForClass($class) as $renderer) { |
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if ($renderer instanceof XmlNodeRendererInterface) { |
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return $this->rendererCache[$class] = $renderer; |
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} |
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} |
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return $this->rendererCache[$class] = $this->fallbackRenderer; |
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} |
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} |
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thephpleague /
commonmark
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