Viewing file:  XmlRenderer.php (4.07 KB) -rw-r--r--
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<?php
declare(strict_types=1);
namespace League\CommonMark\Xml;
use League\CommonMark\Environment\EnvironmentInterface;
use League\CommonMark\Event\DocumentPreRenderEvent;
use League\CommonMark\Exception\InvalidArgumentException;
use League\CommonMark\Node\Block\Document;
use League\CommonMark\Node\Node;
use League\CommonMark\Node\StringContainerInterface;
use League\CommonMark\Output\RenderedContent;
use League\CommonMark\Output\RenderedContentInterface;
use League\CommonMark\Renderer\DocumentRendererInterface;
use League\CommonMark\Util\Xml;
final class XmlRenderer implements DocumentRendererInterface
{
private const INDENTATION = ' ';
private EnvironmentInterface $environment;
private XmlNodeRendererInterface $fallbackRenderer;
/** @var array<class-string, XmlNodeRendererInterface> */
private array $rendererCache = [];
public function __construct(EnvironmentInterface $environment)
{
$this->environment = $environment;
$this->fallbackRenderer = new FallbackNodeXmlRenderer();
}
public function renderDocument(Document $document): RenderedContentInterface
{
$this->environment->dispatch(new DocumentPreRenderEvent($document, 'xml'));
$xml = '<?xml version="1.0" encoding="UTF-8"?>';
$indent = 0;
$walker = $document->walker();
while ($event = $walker->next()) {
$node = $event->getNode();
$closeImmediately = ! $node->hasChildren();
$selfClosing = $closeImmediately && ! $node instanceof StringContainerInterface;
$renderer = $this->findXmlRenderer($node);
$tagName = $renderer->getXmlTagName($node);
if ($event->isEntering()) {
$attrs = $renderer->getXmlAttributes($node);
$xml .= "\n" . \str_repeat(self::INDENTATION, $indent);
$xml .= self::tag($tagName, $attrs, $selfClosing);
if ($node instanceof StringContainerInterface) {
$xml .= Xml::escape($node->getLiteral());
}
if ($closeImmediately && ! $selfClosing) {
$xml .= self::tag('/' . $tagName);
}
if (! $closeImmediately) {
$indent++;
}
} elseif (! $closeImmediately) {
$indent--;
$xml .= "\n" . \str_repeat(self::INDENTATION, $indent);
$xml .= self::tag('/' . $tagName);
}
}
return new RenderedContent($document, $xml . "\n");
}
/**
* @param array<string, string|int|float|bool> $attrs
*/
private static function tag(string $name, array $attrs = [], bool $selfClosing = \false): string
{
$result = '<' . $name;
foreach ($attrs as $key => $value) {
$result .= \sprintf(' %s="%s"', $key, self::convertAndEscape($value));
}
if ($selfClosing) {
$result .= ' /';
}
$result .= '>';
return $result;
}
/**
* @param string|int|float|bool $value
*/
private static function convertAndEscape($value): string
{
if (\is_string($value)) {
return Xml::escape($value);
}
if (\is_int($value) || \is_float($value)) {
return (string) $value;
}
if (\is_bool($value)) {
return $value ? 'true' : 'false';
}
// @phpstan-ignore-next-line
throw new InvalidArgumentException('$value must be a string, int, float, or bool');
}
private function findXmlRenderer(Node $node): XmlNodeRendererInterface
{
$class = \get_class($node);
if (\array_key_exists($class, $this->rendererCache)) {
return $this->rendererCache[$class];
}
foreach ($this->environment->getRenderersForClass($class) as $renderer) {
if ($renderer instanceof XmlNodeRendererInterface) {
return $this->rendererCache[$class] = $renderer;
}
}
return $this->rendererCache[$class] = $this->fallbackRenderer;
}
}
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