mirror of
https://github.com/Pomax/BezierInfo-2.git
synced 2025-10-03 11:31:52 +02:00
77 lines
2.1 KiB
JavaScript
77 lines
2.1 KiB
JavaScript
/**
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*
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* This script acts as support to the latex-loader for webpack.
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* The latex-loader finds and preprocesses LaTeX elements,
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* and then this script is run via execSync, to get the SVG
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* conversion happening synchronously, since Webpack doesn't
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* do async loaders (unfortunately).
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*
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*/
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var className="LaTeX SVG";
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var fs = require("fs");
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var API = require("mathjax-node/lib/mj-single");
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function cleanUp(latex) {
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// strip any \[ and \], which is an block-level LaTeX markup indicator for MathJax:
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latex = latex.replace(/^'/,'').replace(/'$/,'').replace('\\[','').replace('\\]','');
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return latex;
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}
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// Set up the MathJax processor
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API.config({
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MathJax: {
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SVG: {
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font: "Latin-Modern" // STIX-Web is too fat for this article
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},
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TeX: {
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extensions: [
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"AMSmath.js",
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"AMSsymbols.js",
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"autoload-all.js",
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"color.js"
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]
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}
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}
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});
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API.start();
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// Get the LaTeX we need, either straight up or base64 encoded:
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var latex = process.argv.indexOf("--latex");
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if (latex === -1) {
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var base64 = process.argv.indexOf("--base64");
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if (base64 === -1) {
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console.error("missing [--latex] or [--base64] runtime option");
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process.exit(1);
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}
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base64 = process.argv[base64+1];
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latex = new Buffer(base64, "base64").toString();
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} else {
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// get the --latex value
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var args = Array.from(process.argv);
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latex = args.slice(latex+1).join(" ");
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if(!latex) {
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console.error("missing [--latex] runtime option string");
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process.exit(1);
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}
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}
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// Get the filename we'll need to write:
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var hash = process.argv.indexOf("--hash");
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hash = (latex === -1) ? Date.now() : process.argv[hash+1];
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var filename = "images/latex/" + hash + ".svg";
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var destination = __dirname + "/../" + filename;
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// Set up the MathJax options for this conversion run
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var options = { math: cleanUp(latex), format: "TeX", svg: true };
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// Convert the passed LaTeX to SVG form
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API.typeset(options, function saveToFile(data) {
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if (data.errors) {
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console.error(data.errors);
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process.exit(1);
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}
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fs.writeFileSync(destination, data.svg);
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process.exit(0);
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});
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