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53 lines
1.6 KiB
JavaScript
53 lines
1.6 KiB
JavaScript
export function setup(helper) {
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const opts = helper.getOptions();
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if (opts.previewing && opts.injectLineNumbersToPreview) {
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helper.whiteList([
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'p.preview-sync-line',
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'p[data-line-number]',
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'h1.preview-sync-line',
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'h1[data-line-number]',
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'h2.preview-sync-line',
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'h2[data-line-number]',
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'h3.preview-sync-line',
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'h3[data-line-number]',
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'h4.preview-sync-line',
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'h4[data-line-number]',
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'h5.preview-sync-line',
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'h5[data-line-number]',
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'h6.preview-sync-line',
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'h6[data-line-number]',
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'blockquote.preview-sync-line',
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'blockquote[data-line-number]',
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'hr.preview-sync-line',
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'hr[data-line-number]',
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'ul.preview-sync-line',
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'ul[data-line-number]',
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'ol.preview-sync-line',
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'ol[data-line-number]',
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]);
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helper.registerPlugin(md => {
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const injectLineNumber = (tokens, index, options, env, self) => {
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let line;
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const token = tokens[index];
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if (token.map && token.level === 0) {
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line = token.map[0];
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token.attrJoin('class', 'preview-sync-line');
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token.attrSet('data-line-number', String(line));
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}
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return self.renderToken(tokens, index, options, env, self);
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};
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md.renderer.rules.paragraph_open = injectLineNumber;
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md.renderer.rules.heading_open = injectLineNumber;
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md.renderer.rules.blockquote_open = injectLineNumber;
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md.renderer.rules.hr = injectLineNumber;
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md.renderer.rules.ordered_list_open = injectLineNumber;
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md.renderer.rules.bullet_list_open = injectLineNumber;
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});
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}
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}
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