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<?php |
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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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/** |
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* @var Configuration |
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*/ |
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protected $config; |
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/** |
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* @param ElementInterface|null $element |
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* |
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* @return string |
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*/ |
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protected function getNormTag($element) |
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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' || $tag === 'em') { |
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return 'em'; |
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} else if ($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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/** |
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* @param Configuration $config |
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*/ |
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public function setConfig(Configuration $config) |
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{ |
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$this->config = $config; |
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} |
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/** |
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* @param ElementInterface $element |
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* |
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* @return string |
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*/ |
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public function convert(ElementInterface $element) |
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{ |
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$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 $style, respectively. This prevents <em>foo</em><em>bar</em> from |
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* being converted to *foo**bar* which is incorrect. We want *foobar* instead. |
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*/ |
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$pre_style = $this->getNormTag($element->getPreviousSibling()) === $tag ? '' : $style; |
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$post_style = $this->getNormTag($element->getNextSibling()) === $tag ? '' : $style; |
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return $prefix . $pre_style . trim($value) . $post_style . $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() |
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{ |
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return array('em', 'i', 'strong', 'b'); |
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} |
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} |
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thephpleague /
html-to-markdown
