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<?php |
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declare(strict_types=1); |
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namespace League\HTMLToMarkdown\Converter; |
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use League\HTMLToMarkdown\ElementInterface; |
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class PreformattedConverter implements ConverterInterface |
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{ |
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public function convert(ElementInterface $element): string |
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{ |
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$preContent = \html_entity_decode($element->getChildrenAsString()); |
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$preContent = \preg_replace('/<pre\b[^>]*>/', '', $preContent); |
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\assert($preContent !== null); |
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$preContent = \str_replace('</pre>', '', $preContent); |
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/* |
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* Checking for the code tag. |
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* Usually pre tags are used along with code tags. This conditional will check for already converted code tags, |
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* which use backticks, and if those backticks are at the beginning and at the end of the string it means |
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* there's no more information to convert. |
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*/ |
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$firstBacktick = \strpos(\trim($preContent), '`'); |
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$lastBacktick = \strrpos(\trim($preContent), '`'); |
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if ($firstBacktick === 0 && $lastBacktick === \strlen(\trim($preContent)) - 1) { |
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return $preContent . "\n\n"; |
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} |
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// If the execution reaches this point it means it's just a pre tag, with no code tag nested |
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// Empty lines are a special case |
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if ($preContent === '') { |
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return "```\n```\n\n"; |
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} |
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// Normalizing new lines |
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$preContent = \preg_replace('/\r\n|\r|\n/', "\n", $preContent); |
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\assert(\is_string($preContent)); |
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// Ensure there's a newline at the end |
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if (\strrpos($preContent, "\n") !== \strlen($preContent) - \strlen("\n")) { |
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$preContent .= "\n"; |
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} |
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// Use three backticks |
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return "```\n" . $preContent . "```\n\n"; |
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} |
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/** |
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* @return string[] |
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*/ |
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public function getSupportedTags(): array |
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{ |
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return ['pre']; |
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} |
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} |
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