135 lines
4.0 KiB
PHP
135 lines
4.0 KiB
PHP
<?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\DocumentRendererInterface;
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use League\CommonMark\Util\Xml;
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final class XmlRenderer implements DocumentRendererInterface
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{
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private const INDENTATION = ' ';
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private EnvironmentInterface $environment;
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private XmlNodeRendererInterface $fallbackRenderer;
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/** @var array<class-string, XmlNodeRendererInterface> */
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private array $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 (! $closeImmediately) {
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$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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