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