60 lines
1.7 KiB
JavaScript
60 lines
1.7 KiB
JavaScript
// we need a custom renderer for code blocks cause we have a slightly non compliant
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// format with special handling for text and so on
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const TEXT_CODE_CLASSES = ["text", "pre", "plain"];
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function render(tokens, idx, options, env, slf, md) {
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let token = tokens[idx],
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info = token.info ? md.utils.unescapeAll(token.info) : "",
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langName = md.options.discourse.defaultCodeLang,
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className,
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escapedContent = md.utils.escapeHtml(token.content);
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if (info) {
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// strip off any additional languages
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info = info.trim().split(/\s+/g)[0];
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}
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const acceptableCodeClasses = md.options.discourse.acceptableCodeClasses;
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if (
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acceptableCodeClasses &&
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info &&
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acceptableCodeClasses.indexOf(info) !== -1
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) {
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langName = info;
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}
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className =
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TEXT_CODE_CLASSES.indexOf(info) !== -1
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? "lang-nohighlight"
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: "lang-" + langName;
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return `<pre><code class="${className}">${escapedContent}</code></pre>\n`;
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}
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export function setup(helper) {
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helper.registerOptions((opts, siteSettings) => {
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opts.defaultCodeLang = siteSettings.default_code_lang;
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opts.acceptableCodeClasses = (siteSettings.highlighted_languages || "")
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.split("|")
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.filter(Boolean)
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.concat(["auto", "nohighlight"]);
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});
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helper.allowList({
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custom(tag, name, value) {
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if (tag === "code" && name === "class") {
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const m = /^lang\-(.+)$/.exec(value);
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if (m) {
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return helper.getOptions().acceptableCodeClasses.indexOf(m[1]) !== -1;
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}
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}
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},
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});
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helper.registerPlugin((md) => {
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md.renderer.rules.fence = (tokens, idx, options, env, slf) =>
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render(tokens, idx, options, env, slf, md);
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});
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}
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