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<?php |
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declare(strict_types=1); |
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namespace PrinsFrank\PhpGeoSVG\Html\Rendering; |
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use PrinsFrank\PhpGeoSVG\Exception\InvalidArgumentException; |
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use PrinsFrank\PhpGeoSVG\Exception\RecursionException; |
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use PrinsFrank\PhpGeoSVG\Html\Elements\Element; |
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use PrinsFrank\PhpGeoSVG\Html\Elements\Text\TextContent; |
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class ElementRenderer |
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{ |
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private const RECURSION_LIMIT = 10; |
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private const INDENTING_CHAR = ' '; |
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/** |
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* @throws RecursionException |
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*/ |
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public static function renderElement(Element $element, int $currentDepth = 0): string |
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{ |
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if ($currentDepth++ > self::RECURSION_LIMIT) { |
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throw new RecursionException('Recursion limit of ' . self::RECURSION_LIMIT . ' Reached'); |
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} |
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$childElementContent = self::renderChildElements($element->getChildElements(), $currentDepth); |
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$textContent = self::renderTextContent($element->getTextContent(), $currentDepth); |
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if (null === $childElementContent && null === $textContent && $element->canSelfClose()) { |
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return self::renderSelfClosingElement($element); |
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} |
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$attributeString = AttributeRenderer::renderAttributes($element->getAttributes()); |
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return '<' . $element->getTagName() . (null !== $attributeString ? ' ' . $attributeString : null) . '>' . PHP_EOL . |
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$childElementContent . $textContent . |
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str_repeat(self::INDENTING_CHAR, $currentDepth - 1) . '</' . $element->getTagName() . '>' . PHP_EOL; |
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} |
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/** |
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* @throws InvalidArgumentException |
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*/ |
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public static function renderSelfClosingElement(Element $element): string |
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{ |
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if ($element->canSelfClose() === false) { |
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throw new InvalidArgumentException('Only elements that can self close can be rendered as self closing elements'); |
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} |
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$attributeString = AttributeRenderer::renderAttributes($element->getAttributes()); |
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return '<' . $element->getTagName() . (null !== $attributeString ? ' ' . $attributeString : null) . '/>' . PHP_EOL; |
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} |
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/** |
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* @param Element[] $childElements |
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* @throws RecursionException |
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*/ |
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public static function renderChildElements(array $childElements, int $currentDepth): ?string |
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{ |
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$childElementString = null; |
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foreach ($childElements as $childElement) { |
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$childElementString .= str_repeat(self::INDENTING_CHAR, $currentDepth) . self::renderElement($childElement, $currentDepth); |
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} |
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return $childElementString; |
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} |
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public static function renderTextContent(?TextContent $textContent, int $currentDepth): ?string |
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{ |
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if (null !== $textContent) { |
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return str_repeat(self::INDENTING_CHAR, $currentDepth) . $textContent->getContent() . PHP_EOL; |
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} |
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return null; |
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} |
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} |
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PrinsFrank /
php-geo-svg
