89 lines
2.6 KiB
JavaScript
89 lines
2.6 KiB
JavaScript
(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('katex')) :
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typeof define === 'function' && define.amd ? define(['katex'], factory) :
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(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.markedKatex = factory(global.katex));
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})(this, (function (katex) { 'use strict';
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const inlineRule = /^(\${1,2})(?!\$)((?:\\.|[^\\\n])*?(?:\\.|[^\\\n\$]))\1(?=[\s?!\.,:？！。，：]|$)/;
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const inlineRuleNonStandard = /^(\${1,2})(?!\$)((?:\\.|[^\\\n])*?(?:\\.|[^\\\n\$]))\1/; // Non-standard, even if there are no spaces before and after $ or $$, try to parse
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const blockRule = /^(\${1,2})\n((?:\\[^]|[^\\])+?)\n\1(?:\n|$)/;
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function index(options = {}) {
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return {
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extensions: [
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inlineKatex(options, createRenderer(options, false)),
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blockKatex(options, createRenderer(options, true)),
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],
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};
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}
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function createRenderer(options, newlineAfter) {
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return (token) => katex.renderToString(token.text, { ...options, displayMode: token.displayMode }) + (newlineAfter ? '\n' : '');
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}
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function inlineKatex(options, renderer) {
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const nonStandard = options && options.nonStandard;
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const ruleReg = nonStandard ? inlineRuleNonStandard : inlineRule;
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return {
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name: 'inlineKatex',
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level: 'inline',
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start(src) {
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let index;
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let indexSrc = src;
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while (indexSrc) {
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index = indexSrc.indexOf('$');
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if (index === -1) {
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return;
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}
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const f = nonStandard ? index > -1 : index === 0 || indexSrc.charAt(index - 1) === ' ';
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if (f) {
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const possibleKatex = indexSrc.substring(index);
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if (possibleKatex.match(ruleReg)) {
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return index;
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}
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}
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indexSrc = indexSrc.substring(index + 1).replace(/^\$+/, '');
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}
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},
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tokenizer(src, tokens) {
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const match = src.match(ruleReg);
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if (match) {
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return {
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type: 'inlineKatex',
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raw: match[0],
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text: match[2].trim(),
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displayMode: match[1].length === 2,
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};
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}
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},
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renderer,
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};
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}
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function blockKatex(options, renderer) {
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return {
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name: 'blockKatex',
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level: 'block',
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tokenizer(src, tokens) {
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const match = src.match(blockRule);
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if (match) {
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return {
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type: 'blockKatex',
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raw: match[0],
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text: match[2].trim(),
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displayMode: match[1].length === 2,
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};
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}
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},
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renderer,
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};
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}
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return index;
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}));
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