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/**
* Credit to https://ped.ro/writing/code-blocks-but-better
*/
import { visit } from 'unist-util-visit'
const re = /\b([-\w]+)(?:=(?:"([^"]*)"|'([^']*)'|([^"'\s]+)))?/g
export default (options = {}) => {
return tree => {
visit(tree, 'element', visitor)
}
function visitor(node, index, parentNode) {
let match
if (node.tagName === 'code' && node.data && node.data.meta) {
re.lastIndex = 0 // Reset regex.
while ((match = re.exec(node.data.meta))) {
node.properties[match[1]] = match[2] || match[3] || match[4] || ''
parentNode.properties[match[1]] = match[2] || match[3] || match[4] || ''
}
}
}
}
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