mml2html

#! /usr/bin/env node

/*************************************************************************
 *
 *  mml2html
 *
 *  Uses MathJax to convert a MathML string to an HTML string.
 *
 * ----------------------------------------------------------------------
 *
 *  Copyright (c) 2016 The MathJax Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

const mjAPI = require("mathjax-node-sre");
const yargs = require("yargs/yargs");
const { hideBin } = require("yargs/helpers");

const argv = yargs(hideBin(process.argv))
  .usage("$0 [options] 'math' > file.html")
  .option("speech", {
    type: "boolean",
    default: true,
    describe: "include speech text"
  })
  .option("linebreaks", {
    type: "boolean",
    describe: "perform automatic line-breaking"
  })
  .option("ex", {
    type: "number",
    default: 6,
    describe: "ex-size in pixels"
  })
  .option("width", {
    type: "number",
    default: 100,
    describe: "width of container in ex"
  })
  .option("extensions", {
    type: "string",
    default: "",
    describe: "extra MathJax extensions e.g. 'Safe,TeX/noUndefined'"
  })
  .option("css", {
    type: "boolean",
    describe: "output the required CSS rather than the HTML itself"
  })
  .option("fontURL", {
    type: "string",
    default: "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/fonts/HTML-CSS",
    describe: "the URL to use for web fonts"
  })
  .demandCommand(1, "You must provide at least one math expression")
  .strict()
  .help()
  .argv;

mjAPI.config({extensions: argv.extensions});
mjAPI.start();

mjAPI.typeset({
  math: argv._[0],
  format: "MathML",
  html:true, css: argv.css,
  speakText: argv.speech,
  ex: argv.ex, width: argv.width,
  linebreaks: argv.linebreaks
}, function (data) {
  if (!data.errors) {console.log(argv.css ? data.css : data.html)}
});