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var Promise = require('../../utils/promise');
var editHTMLElement = require('./editHTMLElement');
/**
Highlight all code elements
@param {Function(lang, body) -> String} highlight
@param {HTMLDom} $
@return {Promise}
*/
function highlightCode(highlight, $) {
return editHTMLElement($, 'code', function($code) {
var classNames = ($code.attr('class') || '').split(' ');
var lang = classNames
.map(function(cl) {
// Markdown
if (cl.search('lang-') === 0) {
return cl.slice('lang-'.length);
}
// Asciidoc
if (cl.search('language-') === 0) {
return cl.slice('language-'.length);
}
return null;
})
.find(function(cl) {
return Boolean(cl);
});
var source = $code.text();
return Promise(highlight(lang, source))
.then(function(r) {
if (r.html) {
$code.html(r.html);
} else {
$code.text(r.text);
}
});
});
}
module.exports = highlightCode;
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