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145 lines
4.1 KiB
145 lines
4.1 KiB
5 years ago
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#! /usr/bin/env node
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/************************************************************************
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*
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* page2html
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*
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* Reads an HTML5 file from stdin that contains math
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* and writes a new HTML5 document to stdout that
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* contains CommonHTML versions of the math instead.
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*
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* ----------------------------------------------------------------------
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*
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* Copyright (c) 2016 The MathJax Consortium
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var mjAPI = require("../lib/mj-page.js");
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var fs = require('fs');
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var jsdom = require('jsdom').jsdom;
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var argv = require("yargs")
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.strict()
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.usage("Usage: page2html [options] < input.html > output.html",{
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preview: {
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boolean: true,
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describe: "make HTML into a MathJax preview"
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},
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speech: {
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boolean: true,
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describe: "include speech text"
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},
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speechrules: {
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default: "mathspeak",
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describe: "ruleset to use for speech text (chromevox or mathspeak)"
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},
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speechstyle: {
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default: "default",
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describe: "style to use for speech text (default, brief, sbrief)"
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},
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linebreaks: {
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boolean: true,
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describe: "perform automatic line-breaking"
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},
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nodollars: {
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boolean: true,
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describe: "don't use single-dollar delimiters"
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},
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format: {
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default: "AsciiMath,TeX,MathML",
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describe: "input format(s) to look for"
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},
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eqno: {
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default: "none",
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describe: "equation number style (none, AMS, or all)"
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},
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ex: {
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default: 6,
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describe: "ex-size in pixels"
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},
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width: {
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default: 100,
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describe: "width of container in ex"
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},
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extensions: {
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default: "",
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describe: "extra MathJax extensions e.g. 'Safe,TeX/noUndefined'"
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},
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fontURL: {
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default: "https://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS",
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describe: "the URL to use for web fonts"
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}
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})
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.argv;
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argv.format = argv.format.split(/ *, */);
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mjAPI.config({extensions: argv.extensions, fontURL: argv.fontURL});
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mjAPI.start();
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//
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// Process an HTML file:
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//
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function processHTML(html,callback) {
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var document = jsdom(html,{features:{FetchExternalResources: false}});
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var xmlns = getXMLNS(document);
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mjAPI.typeset({
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html: document.body.innerHTML,
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renderer: "CommonHTML",
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inputs: argv.format,
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equationNumbers: argv.eqno,
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singleDollars: !argv.nodollars,
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addPreview: argv.preview,
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speakText: argv.speech,
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speakRuleset: argv.speechrules.replace(/^chromevox$/i,"default"),
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speakStyle: argv.speechstyle,
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ex: argv.ex, width: argv.width,
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linebreaks: argv.linebreaks,
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xmlns:xmlns
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}, function (result) {
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document.body.innerHTML = result.html;
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document.head.appendChild(document.body.firstChild);
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var HTML = "<!DOCTYPE html>\n"+document.documentElement.outerHTML.replace(/^(\n|\s)*/,"");
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callback(HTML);
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});
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}
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//
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// Look up the MathML namespace from the <html> attributes
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//
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function getXMLNS(document) {
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var html = document.head.parentNode;
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for (var i = 0, m = html.attributes.length; i < m; i++) {
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var attr = html.attributes[i];
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if (attr.nodeName.substr(0,6) === "xmlns:" &&
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attr.nodeValue === "http://www.w3.org/1998/Math/MathML")
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{return attr.nodeName.substr(6)}
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}
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return "mml";
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}
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//
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// Read the input file and collect the file contents
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// When done, process the HTML.
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//
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var html = [];
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process.stdin.on("readable",function (block) {
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var chunk = process.stdin.read();
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if (chunk) html.push(chunk.toString('utf8'));
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});
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process.stdin.on("end",function () {
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processHTML(html.join(""), function(html) {
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process.stdout.write(html);
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});
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});
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