27 lines
718 B
TypeScript
27 lines
718 B
TypeScript
import * as mfm from "mfm-js";
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import { defaultStore } from "@/store";
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import { expandKaTeXMacro } from "@/scripts/katex-macro";
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export default function preprocess(text: string): string {
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if (defaultStore.state.enableCustomKaTeXMacro) {
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const parsedKaTeXMacro =
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localStorage.getItem("customKaTeXMacroParsed") ?? "{}";
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const maxNumberOfExpansions = 200; // to prevent infinite expansion loops
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const nodes = mfm.parse(text);
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for (const node of nodes) {
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if (node.type === "mathInline" || node.type === "mathBlock") {
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node.props.formula = expandKaTeXMacro(
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node.props.formula,
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parsedKaTeXMacro,
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maxNumberOfExpansions,
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);
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}
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}
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text = mfm.toString(nodes);
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}
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return text;
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}
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