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<?php
declare(strict_types=1);
namespace League\HTMLToMarkdown\Converter;
use League\HTMLToMarkdown\Configuration;
use League\HTMLToMarkdown\ConfigurationAwareInterface;
use League\HTMLToMarkdown\ElementInterface;
class EmphasisConverter implements ConverterInterface, ConfigurationAwareInterface
{
/** @var Configuration */
protected $config;
protected function getNormTag(?ElementInterface $element): string
{
if ($element !== null && ! $element->isText()) {
$tag = $element->getTagName();
if ($tag === 'i' || $tag === 'em') {
return 'em';
}
if ($tag === 'b' || $tag === 'strong') {
return 'strong';
}
}
return '';
}
public function setConfig(Configuration $config): void
{
$this->config = $config;
}
public function convert(ElementInterface $element): string
{
$tag = $this->getNormTag($element);
$value = $element->getValue();
if (! \trim($value)) {
return $value;
}
if ($tag === 'em') {
$style = $this->config->getOption('italic_style');
} else {
$style = $this->config->getOption('bold_style');
}
$prefix = \ltrim($value) !== $value ? ' ' : '';
$suffix = \rtrim($value) !== $value ? ' ' : '';
/* If this node is immediately preceded or followed by one of the same type don't emit
* the start or end $style, respectively. This prevents <em>foo</em><em>bar</em> from
* being converted to *foo**bar* which is incorrect. We want *foobar* instead.
*/
$preStyle = $this->getNormTag($element->getPreviousSibling()) === $tag ? '' : $style;
$postStyle = $this->getNormTag($element->getNextSibling()) === $tag ? '' : $style;
return $prefix . $preStyle . \trim($value) . $postStyle . $suffix;
}
/**
* @return string[]
*/
public function getSupportedTags(): array
{
return ['em', 'i', 'strong', 'b'];
}
}
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