wikijs-fork/server/modules/renderer/html-mathjax/mathjax.js

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const mathjax = require('mathjax-node')
const _ = require('lodash')
// ------------------------------------
// Mathjax
// ------------------------------------
/* global WIKI */
const mathRegex = [
{
format: 'TeX',
regex: /\\\[([\s\S]*?)\\\]/g
},
{
format: 'inline-TeX',
regex: /\\\((.*?)\\\)/g
},
{
format: 'MathML',
regex: /<math([\s\S]*?)<\/math>/g
}
]
module.exports = {
key: 'common/mathjax',
title: 'Mathjax',
dependsOn: [],
props: [],
init (conf) {
mathjax.config({
MathJax: {
jax: ['input/TeX', 'input/MathML', 'output/SVG'],
extensions: ['tex2jax.js', 'mml2jax.js'],
TeX: {
extensions: ['AMSmath.js', 'AMSsymbols.js', 'noErrors.js', 'noUndefined.js']
},
SVG: {
scale: 120,
font: 'STIX-Web'
}
}
})
},
async render (content) {
let matchStack = []
let replaceStack = []
let currentMatch
let mathjaxState = {}
_.forEach(mathRegex, mode => {
do {
currentMatch = mode.regex.exec(content)
if (currentMatch) {
matchStack.push(currentMatch[0])
replaceStack.push(
new Promise((resolve, reject) => {
mathjax.typeset({
math: (mode.format === 'MathML') ? currentMatch[0] : currentMatch[1],
format: mode.format,
speakText: false,
svg: true,
state: mathjaxState,
timeout: 30 * 1000
}, result => {
if (!result.errors) {
resolve(result.svg)
} else {
resolve(currentMatch[0])
WIKI.logger.warn(result.errors.join(', '))
}
})
})
)
}
} while (currentMatch)
})
return (matchStack.length > 0) ? Promise.all(replaceStack).then(results => {
_.forEach(matchStack, (repMatch, idx) => {
content = content.replace(repMatch, results[idx])
})
return content
}) : Promise.resolve(content)
}
}