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// Copyright 2020-2021 The Khronos Group, Inc.
//
// SPDX-License-Identifier: Apache-2.0
// Translates the latexmath in html on build time using KaTeX
// Usage: nodejs translate_math.js katex/katex.min.js vkspec.html
const katex = require(process.argv[2]);
const fs = require("fs");
const escapeRegex = require("escape-string-regexp");
const he = require('he');
const filepath = process.argv[3];
var html = fs.readFileSync(filepath, "utf8");
const delimiters = [
//{ left: "$$", right: "$$", display: true},
{ left: "\\[", right: "\\]", display: true},
//{ left: "$", right: "$", display: false},
{ left: "\\(", right: "\\)", display: false}
]
for( var delim of delimiters ) {
const regex = new RegExp( escapeRegex(delim.left) + "([\\S\\s]*?)" + escapeRegex(delim.right), "g");
html = html.replace( regex,
function(match, g1) {
return katex.renderToString( he.decode(g1, {'strict': true}), {displayMode: delim.display, output: 'html', strict: true} );
}
);
}
fs.writeFileSync(filepath, html, 'utf8');
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