mirror of https://github.com/jkjoy/sunpeiwen.git
57 lines
1.6 KiB
JavaScript
57 lines
1.6 KiB
JavaScript
const components = require('../components.js');
|
|
const getLoader = require('../dependencies');
|
|
|
|
|
|
/**
|
|
* The set of all languages which have been loaded using the below function.
|
|
*
|
|
* @type {Set<string>}
|
|
*/
|
|
const loadedLanguages = new Set();
|
|
|
|
/**
|
|
* Loads the given languages and adds them to the current Prism instance.
|
|
*
|
|
* If no languages are provided, __all__ Prism languages will be loaded.
|
|
*
|
|
* @param {string|string[]} [languages]
|
|
* @returns {void}
|
|
*/
|
|
function loadLanguages(languages) {
|
|
if (languages === undefined) {
|
|
languages = Object.keys(components.languages).filter(l => l != 'meta');
|
|
} else if (!Array.isArray(languages)) {
|
|
languages = [languages];
|
|
}
|
|
|
|
// the user might have loaded languages via some other way or used `prism.js` which already includes some
|
|
// we don't need to validate the ids because `getLoader` will ignore invalid ones
|
|
const loaded = [...loadedLanguages, ...Object.keys(Prism.languages)];
|
|
|
|
getLoader(components, languages, loaded).load(lang => {
|
|
if (!(lang in components.languages)) {
|
|
if (!loadLanguages.silent) {
|
|
console.warn('Language does not exist: ' + lang);
|
|
}
|
|
return;
|
|
}
|
|
|
|
const pathToLanguage = './prism-' + lang;
|
|
|
|
// remove from require cache and from Prism
|
|
delete require.cache[require.resolve(pathToLanguage)];
|
|
delete Prism.languages[lang];
|
|
|
|
require(pathToLanguage);
|
|
|
|
loadedLanguages.add(lang);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Set this to `true` to prevent all warning messages `loadLanguages` logs.
|
|
*/
|
|
loadLanguages.silent = false;
|
|
|
|
module.exports = loadLanguages;
|