50 lines
1.6 KiB
JavaScript
50 lines
1.6 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 (acceptableCodeClasses && info && acceptableCodeClasses.indexOf(info) !== -1) {
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langName = info;
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}
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className = TEXT_CODE_CLASSES.indexOf(info) !== -1 ? 'lang-nohighlight' : '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 || "").split("|").concat(['auto', 'nohighlight']);
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});
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helper.whiteList({
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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)=>render(tokens,idx,options,env,slf,md);
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});
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}
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