58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
/**
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* @typedef {import('mdast').Root} Root
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* @typedef {import('retext-smartypants').Options} Options
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*/
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import { retext } from "retext";
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import { visit } from "unist-util-visit";
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import smartypants from "retext-smartypants";
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/**
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* remark plugin to implement SmartyPants.
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*
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* @type {import('unified').Plugin<[Options?] | void[], Root>}
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*/
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export default function remarkSmartypants(options) {
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const processor = retext().use(smartypants, {
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...options,
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// Do not replace ellipses, dashes, backticks because they change string
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// length, and we couldn't guarantee right splice of text in second visit of
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// tree
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ellipses: false,
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dashes: false,
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backticks: false,
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});
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const processor2 = retext().use(smartypants, {
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...options,
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// Do not replace quotes because they are already replaced in the first
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// processor
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quotes: false,
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});
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return (tree) => {
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let allText = "";
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let startIndex = 0;
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const nodes = [];
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visit(tree, ["text", "inlineCode"], (node) => {
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allText +=
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node.type === "text" ? node.value : "A".repeat(node.value.length);
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nodes.push(node);
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});
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// Concat all text into one string, to properly replace quotes around links
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// and bold text
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allText = processor.processSync(allText).value;
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for (const node of nodes) {
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const endIndex = startIndex + node.value.length;
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if (node.type === "text") {
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const processedText = allText.slice(startIndex, endIndex);
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node.value = processor2.processSync(processedText).value;
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}
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startIndex = endIndex;
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}
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};
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}
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