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merge upstream

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This commit is contained in:
Niklas Buschmann 2021-02-28 21:34:43 +01:00
parent 232e443aeb
commit dbdf78b5fe
89 changed files with 44470 additions and 19 deletions
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1
README.md
View File

@ -22,6 +22,7 @@ theme = "contrast-hugo"
[params]
minimal = false
excerpts = false
description = "my blog"
[menu]

8
layouts/_default/baseof.html
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@ -7,16 +7,18 @@
<meta name="description" content="{{ .Description | default .Site.Params.description }}">
{{- end }}
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="{{ .Site.BaseURL }}css/{{ if .Site.Params.minimal }}minimal.css{{else}}index.css{{ end }}">
<link rel="stylesheet" href="{{ .Site.BaseURL }}css/{{ if .Site.Params.minimal }}minimal.css{{ else }}index.css{{ end }}">
<link rel="canonical" href="{{ .Permalink }}">
<link rel="alternate" type="application/rss+xml" href="{{ with .OutputFormats.Get "RSS" }}{{ .RelPermalink }}{{ end }}" title="{{ .Site.Title }}">
{{- if or .Params.math .Site.Params.math }}
{{ partial "math.html" . }}
<link rel="stylesheet" href="{{ .Site.BaseURL }}katex/katex.min.css">
<script defer src="{{ .Site.BaseURL }}katex/katex.min.js"></script>
<script defer src="{{ .Site.BaseURL }}katex/contrib/auto-render.min.js" onload="renderMathInElement(document.body)"></script>
{{- end }}
<header>
{{ if not (gt (len .Site.Menus) 1) }}
<a href="{{ .Site.BaseURL }}">{{ .Site.Title }}</a>
<a href="{{ .Site.BaseURL }}" class="title">{{ .Site.Title }}</a>
{{ end }}
{{ range $menu, $items := .Site.Menus }}
<nav>

25
layouts/_default/list.html
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@ -6,12 +6,29 @@
{{ $Pages = where site.RegularPages "Type" "in" .Site.Params.mainSections }}
{{ end }}
{{ if .Site.Params.excerpts }}
{{- range $Pages }}
<article>
<header>
<h1>{{ .Title }}</h1>
{{ if .Date }}<time datetime="{{ .Date.Format "2006-01-02T15:04:05Z07:00" }}">{{ .Date.Format "January 02, 2006" }}</time>{{ end }}
</header>
{{ .Summary }}
{{- if .Truncated }}
<div class="more"><a href="{{ .RelPermalink }}">read more</a></div>
{{- end }}
</article>
{{- end }}
{{ else }}
<article>
<header><h1>{{ .Title | default "Posts" | humanize }}</h1></header>
<ul>
<ul class="archive">
{{- range $Pages }}
<li style="font-size: 1.1em;">
{{ if .Date }}<time datetime="{{ .Date.Format "2006-01-02T15:04:05Z07:00" }}" style="display: inline-block; min-width: 10ch; margin: 0 .2em;">{{ .Date.Format "2006-01-02" }}</time>{{ end }}
<li>
{{ if .Date }}<time datetime="{{ .Date.Format "2006-01-02T15:04:05Z07:00" }}">{{ .Date.Format "2006-01-02" }}</time>{{ end }}
<a href="{{ .Permalink }}">{{ .Title }}</a>
</li>
{{- end }}
@ -20,3 +37,5 @@
</article>
{{ end }}
{{ end }}

6
layouts/partials/math.html
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@ -1,3 +1,3 @@
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.css" integrity="sha384-AfEj0r4/OFrOo5t7NnNe46zW/tFgW6x/bCJG8FqQCEo3+Aro6EYUG4+cU+KJWu/X" crossorigin="anonymous">
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.js" integrity="sha384-g7c+Jr9ZivxKLnZTDUhnkOnsh30B4H0rpLUpJ4jAIKs4fnJI+sEnkvrMWph2EDg4" crossorigin="anonymous"></script>
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/contrib/auto-render.min.js" integrity="sha384-mll67QQFJfxn0IYznZYonOWZ644AWYC+Pt2cHqMaRhXVrursRwvLnLaebdGIlYNa" crossorigin="anonymous" onload="renderMathInElement(document.body);"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.css">
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.js"></script>
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/contrib/auto-render.min.js" onload="renderMathInElement(document.body)"></script>

37
static/css/index.css
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@ -123,16 +123,12 @@ body > header {
border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
body > header > a {
font-size: 1.4em;
}
article header {
margin-bottom: 1.5em;
}
article header h1 {
font-size: 1.8em;
font-size: 1.7em;
margin: 0 0 .1em;
}
@ -155,3 +151,34 @@ body > header, body > article {
color: #ffffff;
}
}
.title {
font-size: 1.4em;
}
.archive {
font-size: 1.1em;
}
.archive time {
display: inline-block;
min-width: 10ch;
margin: 0 .2em;
}
.more {
margin: 2em 0 1em;
}
.more a {
border-radius: 2px;
border: 1.5px solid #68f;
padding: .4em .8em;
transition: .2s background, .2s color;
}
.more a:hover {
color: #fff;
background: #68f;
text-decoration: inherit;
}

37
static/css/minimal.css
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@ -126,16 +126,12 @@ body > header {
border-bottom: 1px solid rgba(142, 142, 145, 0.16);
}
body > header > a {
font-size: 1.4em;
}
article header {
margin-bottom: 1.5em;
}
article header h1 {
font-size: 1.8em;
font-size: 1.7em;
margin: 0 0 .1em;
}
@ -156,3 +152,34 @@ body > header, body > article {
padding: 1.7em calc(38% - 12em);
}
}
.title {
font-size: 1.4em;
}
.archive {
font-size: 1.1em;
}
.archive time {
display: inline-block;
min-width: 10ch;
margin: 0 .2em;
}
.more {
margin: 2em 0 1em;
}
.more a {
border-radius: 2px;
border: 1.5px solid #68f;
padding: .4em .8em;
transition: .2s background, .2s color;
}
.more a:hover {
color: #fff;
background: #68f;
text-decoration: inherit;
}

91
static/katex/README.md Normal file
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@ -0,0 +1,91 @@
# [<img src="https://katex.org/img/katex-logo-black.svg" width="130" alt="KaTeX">](https://katex.org/)
[![npm](https://img.shields.io/npm/v/katex.svg)](https://www.npmjs.com/package/katex)
[![CircleCI](https://circleci.com/gh/KaTeX/KaTeX.svg?style=shield)](https://circleci.com/gh/KaTeX/KaTeX)
[![codecov](https://codecov.io/gh/KaTeX/KaTeX/branch/master/graph/badge.svg)](https://codecov.io/gh/KaTeX/KaTeX)
[![Join the chat at https://gitter.im/KaTeX/KaTeX](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/KaTeX/KaTeX?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
[![Dependabot Status](https://api.dependabot.com/badges/status?host=github&repo=KaTeX/KaTeX)](https://dependabot.com)
[![jsDelivr](https://data.jsdelivr.com/v1/package/npm/katex/badge?style=rounded)](https://www.jsdelivr.com/package/npm/katex)
![](https://img.badgesize.io/KaTeX/KaTeX/v0.12.0/dist/katex.min.js?compression=gzip)
KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web.
* **Fast:** KaTeX renders its math synchronously and doesn't need to reflow the page. See how it compares to a competitor in [this speed test](http://www.intmath.com/cg5/katex-mathjax-comparison.php).
* **Print quality:** KaTeX's layout is based on Donald Knuth's TeX, the gold standard for math typesetting.
* **Self contained:** KaTeX has no dependencies and can easily be bundled with your website resources.
* **Server side rendering:** KaTeX produces the same output regardless of browser or environment, so you can pre-render expressions using Node.js and send them as plain HTML.
KaTeX is compatible with all major browsers, including Chrome, Safari, Firefox, Opera, Edge, and IE 11.
KaTeX supports much (but not all) of LaTeX and many LaTeX packages. See the [list of supported functions](https://katex.org/docs/supported.html).
Try out KaTeX [on the demo page](https://katex.org/#demo)!
## Getting started
### Starter template
```html
<!DOCTYPE html>
<!-- KaTeX requires the use of the HTML5 doctype. Without it, KaTeX may not render properly -->
<html>
<head>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.css" integrity="sha384-AfEj0r4/OFrOo5t7NnNe46zW/tFgW6x/bCJG8FqQCEo3+Aro6EYUG4+cU+KJWu/X" crossorigin="anonymous">
<!-- The loading of KaTeX is deferred to speed up page rendering -->
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.js" integrity="sha384-g7c+Jr9ZivxKLnZTDUhnkOnsh30B4H0rpLUpJ4jAIKs4fnJI+sEnkvrMWph2EDg4" crossorigin="anonymous"></script>
<!-- To automatically render math in text elements, include the auto-render extension: -->
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/contrib/auto-render.min.js" integrity="sha384-mll67QQFJfxn0IYznZYonOWZ644AWYC+Pt2cHqMaRhXVrursRwvLnLaebdGIlYNa" crossorigin="anonymous"
onload="renderMathInElement(document.body);"></script>
</head>
...
</html>
```
You can also [download KaTeX](https://github.com/KaTeX/KaTeX/releases) and host it yourself.
For details on how to configure auto-render extension, refer to [the documentation](https://katex.org/docs/autorender.html).
### API
Call `katex.render` to render a TeX expression directly into a DOM element.
For example:
```js
katex.render("c = \\pm\\sqrt{a^2 + b^2}", element, {
throwOnError: false
});
```
Call `katex.renderToString` to generate an HTML string of the rendered math,
e.g., for server-side rendering. For example:
```js
var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}", {
throwOnError: false
});
// '<span class="katex">...</span>'
```
Make sure to include the CSS and font files in both cases.
If you are doing all rendering on the server, there is no need to include the
JavaScript on the client.
The examples above use the `throwOnError: false` option, which renders invalid
inputs as the TeX source code in red (by default), with the error message as
hover text. For other available options, see the
[API documentation](https://katex.org/docs/api.html),
[options documentation](https://katex.org/docs/options.html), and
[handling errors documentation](https://katex.org/docs/error.html).
## Demo and Documentation
Learn more about using KaTeX [on the website](https://katex.org)!
## Contributing
See [CONTRIBUTING.md](CONTRIBUTING.md)
## License
KaTeX is licensed under the [MIT License](http://opensource.org/licenses/MIT).

350
static/katex/contrib/auto-render.js Normal file
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@ -0,0 +1,350 @@
(function webpackUniversalModuleDefinition(root, factory) {
if(typeof exports === 'object' && typeof module === 'object')
module.exports = factory(require("katex"));
else if(typeof define === 'function' && define.amd)
define(["katex"], factory);
else if(typeof exports === 'object')
exports["renderMathInElement"] = factory(require("katex"));
else
root["renderMathInElement"] = factory(root["katex"]);
})((typeof self !== 'undefined' ? self : this), function(__WEBPACK_EXTERNAL_MODULE__0__) {
return /******/ (function(modules) { // webpackBootstrap
/******/ // The module cache
/******/ var installedModules = {};
/******/
/******/ // The require function
/******/ function __webpack_require__(moduleId) {
/******/
/******/ // Check if module is in cache
/******/ if(installedModules[moduleId]) {
/******/ return installedModules[moduleId].exports;
/******/ }
/******/ // Create a new module (and put it into the cache)
/******/ var module = installedModules[moduleId] = {
/******/ i: moduleId,
/******/ l: false,
/******/ exports: {}
/******/ };
/******/
/******/ // Execute the module function
/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/
/******/ // Flag the module as loaded
/******/ module.l = true;
/******/
/******/ // Return the exports of the module
/******/ return module.exports;
/******/ }
/******/
/******/
/******/ // expose the modules object (__webpack_modules__)
/******/ __webpack_require__.m = modules;
/******/
/******/ // expose the module cache
/******/ __webpack_require__.c = installedModules;
/******/
/******/ // define getter function for harmony exports
/******/ __webpack_require__.d = function(exports, name, getter) {
/******/ if(!__webpack_require__.o(exports, name)) {
/******/ Object.defineProperty(exports, name, { enumerable: true, get: getter });
/******/ }
/******/ };
/******/
/******/ // define __esModule on exports
/******/ __webpack_require__.r = function(exports) {
/******/ if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
/******/ Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
/******/ }
/******/ Object.defineProperty(exports, '__esModule', { value: true });
/******/ };
/******/
/******/ // create a fake namespace object
/******/ // mode & 1: value is a module id, require it
/******/ // mode & 2: merge all properties of value into the ns
/******/ // mode & 4: return value when already ns object
/******/ // mode & 8|1: behave like require
/******/ __webpack_require__.t = function(value, mode) {
/******/ if(mode & 1) value = __webpack_require__(value);
/******/ if(mode & 8) return value;
/******/ if((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
/******/ var ns = Object.create(null);
/******/ __webpack_require__.r(ns);
/******/ Object.defineProperty(ns, 'default', { enumerable: true, value: value });
/******/ if(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));
/******/ return ns;
/******/ };
/******/
/******/ // getDefaultExport function for compatibility with non-harmony modules
/******/ __webpack_require__.n = function(module) {
/******/ var getter = module && module.__esModule ?
/******/ function getDefault() { return module['default']; } :
/******/ function getModuleExports() { return module; };
/******/ __webpack_require__.d(getter, 'a', getter);
/******/ return getter;
/******/ };
/******/
/******/ // Object.prototype.hasOwnProperty.call
/******/ __webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
/******/
/******/ // __webpack_public_path__
/******/ __webpack_require__.p = "";
/******/
/******/
/******/ // Load entry module and return exports
/******/ return __webpack_require__(__webpack_require__.s = 1);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/***/ (function(module, exports) {
module.exports = __WEBPACK_EXTERNAL_MODULE__0__;
/***/ }),
/* 1 */
/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
__webpack_require__.r(__webpack_exports__);
// EXTERNAL MODULE: external "katex"
var external_katex_ = __webpack_require__(0);
var external_katex_default = /*#__PURE__*/__webpack_require__.n(external_katex_);
// CONCATENATED MODULE: ./contrib/auto-render/splitAtDelimiters.js
/* eslint no-constant-condition:0 */
var findEndOfMath = function findEndOfMath(delimiter, text, startIndex) {
// Adapted from
// https://github.com/Khan/perseus/blob/master/src/perseus-markdown.jsx
var index = startIndex;
var braceLevel = 0;
var delimLength = delimiter.length;
while (index < text.length) {
var character = text[index];
if (braceLevel <= 0 && text.slice(index, index + delimLength) === delimiter) {
return index;
} else if (character === "\\") {
index++;
} else if (character === "{") {
braceLevel++;
} else if (character === "}") {
braceLevel--;
}
index++;
}
return -1;
};
var splitAtDelimiters = function splitAtDelimiters(startData, leftDelim, rightDelim, display) {
var finalData = [];
for (var i = 0; i < startData.length; i++) {
if (startData[i].type === "text") {
var text = startData[i].data;
var lookingForLeft = true;
var currIndex = 0;
var nextIndex = void 0;
nextIndex = text.indexOf(leftDelim);
if (nextIndex !== -1) {
currIndex = nextIndex;
finalData.push({
type: "text",
data: text.slice(0, currIndex)
});
lookingForLeft = false;
}
while (true) {
if (lookingForLeft) {
nextIndex = text.indexOf(leftDelim, currIndex);
if (nextIndex === -1) {
break;
}
finalData.push({
type: "text",
data: text.slice(currIndex, nextIndex)
});
currIndex = nextIndex;
} else {
nextIndex = findEndOfMath(rightDelim, text, currIndex + leftDelim.length);
if (nextIndex === -1) {
break;
}
finalData.push({
type: "math",
data: text.slice(currIndex + leftDelim.length, nextIndex),
rawData: text.slice(currIndex, nextIndex + rightDelim.length),
display: display
});
currIndex = nextIndex + rightDelim.length;
}
lookingForLeft = !lookingForLeft;
}
finalData.push({
type: "text",
data: text.slice(currIndex)
});
} else {
finalData.push(startData[i]);
}
}
return finalData;
};
/* harmony default export */ var auto_render_splitAtDelimiters = (splitAtDelimiters);
// CONCATENATED MODULE: ./contrib/auto-render/auto-render.js
/* eslint no-console:0 */
var auto_render_splitWithDelimiters = function splitWithDelimiters(text, delimiters) {
var data = [{
type: "text",
data: text
}];
for (var i = 0; i < delimiters.length; i++) {
var delimiter = delimiters[i];
data = auto_render_splitAtDelimiters(data, delimiter.left, delimiter.right, delimiter.display || false);
}
return data;
};
/* Note: optionsCopy is mutated by this method. If it is ever exposed in the
* API, we should copy it before mutating.
*/
var auto_render_renderMathInText = function renderMathInText(text, optionsCopy) {
var data = auto_render_splitWithDelimiters(text, optionsCopy.delimiters);
if (data.length === 1 && data[0].type === 'text') {
// There is no formula in the text.
// Let's return null which means there is no need to replace
// the current text node with a new one.
return null;
}
var fragment = document.createDocumentFragment();
for (var i = 0; i < data.length; i++) {
if (data[i].type === "text") {
fragment.appendChild(document.createTextNode(data[i].data));
} else {
var span = document.createElement("span");
var math = data[i].data; // Override any display mode defined in the settings with that
// defined by the text itself
optionsCopy.displayMode = data[i].display;
try {
if (optionsCopy.preProcess) {
math = optionsCopy.preProcess(math);
}
external_katex_default.a.render(math, span, optionsCopy);
} catch (e) {
if (!(e instanceof external_katex_default.a.ParseError)) {
throw e;
}
optionsCopy.errorCallback("KaTeX auto-render: Failed to parse `" + data[i].data + "` with ", e);
fragment.appendChild(document.createTextNode(data[i].rawData));
continue;
}
fragment.appendChild(span);
}
}
return fragment;
};
var renderElem = function renderElem(elem, optionsCopy) {
for (var i = 0; i < elem.childNodes.length; i++) {
var childNode = elem.childNodes[i];
if (childNode.nodeType === 3) {
// Text node
var frag = auto_render_renderMathInText(childNode.textContent, optionsCopy);
if (frag) {
i += frag.childNodes.length - 1;
elem.replaceChild(frag, childNode);
}
} else if (childNode.nodeType === 1) {
(function () {
// Element node
var className = ' ' + childNode.className + ' ';
var shouldRender = optionsCopy.ignoredTags.indexOf(childNode.nodeName.toLowerCase()) === -1 && optionsCopy.ignoredClasses.every(function (x) {
return className.indexOf(' ' + x + ' ') === -1;
});
if (shouldRender) {
renderElem(childNode, optionsCopy);
}
})();
} // Otherwise, it's something else, and ignore it.
}
};
var renderMathInElement = function renderMathInElement(elem, options) {
if (!elem) {
throw new Error("No element provided to render");
}
var optionsCopy = {}; // Object.assign(optionsCopy, option)
for (var option in options) {
if (options.hasOwnProperty(option)) {
optionsCopy[option] = options[option];
}
} // default options
optionsCopy.delimiters = optionsCopy.delimiters || [{
left: "$$",
right: "$$",
display: true
}, {
left: "\\(",
right: "\\)",
display: false
}, // LaTeX uses $…$, but it ruins the display of normal `$` in text:
// {left: "$", right: "$", display: false},
// \[…\] must come last in this array. Otherwise, renderMathInElement
// will search for \[ before it searches for $$ or \(
// That makes it susceptible to finding a \\[0.3em] row delimiter and
// treating it as if it were the start of a KaTeX math zone.
{
left: "\\[",
right: "\\]",
display: true
}];
optionsCopy.ignoredTags = optionsCopy.ignoredTags || ["script", "noscript", "style", "textarea", "pre", "code", "option"];
optionsCopy.ignoredClasses = optionsCopy.ignoredClasses || [];
optionsCopy.errorCallback = optionsCopy.errorCallback || console.error; // Enable sharing of global macros defined via `\gdef` between different
// math elements within a single call to `renderMathInElement`.
optionsCopy.macros = optionsCopy.macros || {};
renderElem(elem, optionsCopy);
};
/* harmony default export */ var auto_render = __webpack_exports__["default"] = (renderMathInElement);
/***/ })
/******/ ])["default"];
});

1
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!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t(require("katex")):"function"==typeof define&&define.amd?define(["katex"],t):"object"==typeof exports?exports.renderMathInElement=t(require("katex")):e.renderMathInElement=t(e.katex)}("undefined"!=typeof self?self:this,function(e){return function(e){var t={};function r(n){if(t[n])return t[n].exports;var o=t[n]={i:n,l:!1,exports:{}};return e[n].call(o.exports,o,o.exports,r),o.l=!0,o.exports}return r.m=e,r.c=t,r.d=function(e,t,n){r.o(e,t)||Object.defineProperty(e,t,{enumerable:!0,get:n})},r.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},r.t=function(e,t){if(1&t&&(e=r(e)),8&t)return e;if(4&t&&"object"==typeof e&&e&&e.__esModule)return e;var n=Object.create(null);if(r.r(n),Object.defineProperty(n,"default",{enumerable:!0,value:e}),2&t&&"string"!=typeof e)for(var o in e)r.d(n,o,function(t){return e[t]}.bind(null,o));return n},r.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return r.d(t,"a",t),t},r.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},r.p="",r(r.s=1)}([function(t,r){t.exports=e},function(e,t,r){"use strict";r.r(t);var n=r(0),o=r.n(n),a=function(e,t,r){for(var n=r,o=0,a=e.length;n<t.length;){var i=t[n];if(o<=0&&t.slice(n,n+a)===e)return n;"\\"===i?n++:"{"===i?o++:"}"===i&&o--,n++}return-1},i=function(e,t,r,n){for(var o=[],i=0;i<e.length;i++)if("text"===e[i].type){var l=e[i].data,d=!0,s=0,f=void 0;for(-1!==(f=l.indexOf(t))&&(s=f,o.push({type:"text",data:l.slice(0,s)}),d=!1);;){if(d){if(-1===(f=l.indexOf(t,s)))break;o.push({type:"text",data:l.slice(s,f)}),s=f}else{if(-1===(f=a(r,l,s+t.length)))break;o.push({type:"math",data:l.slice(s+t.length,f),rawData:l.slice(s,f+r.length),display:n}),s=f+r.length}d=!d}o.push({type:"text",data:l.slice(s)})}else o.push(e[i]);return o},l=function(e,t){var r=function(e,t){for(var r=[{type:"text",data:e}],n=0;n<t.length;n++){var o=t[n];r=i(r,o.left,o.right,o.display||!1)}return r}(e,t.delimiters);if(1===r.length&&"text"===r[0].type)return null;for(var n=document.createDocumentFragment(),a=0;a<r.length;a++)if("text"===r[a].type)n.appendChild(document.createTextNode(r[a].data));else{var l=document.createElement("span"),d=r[a].data;t.displayMode=r[a].display;try{t.preProcess&&(d=t.preProcess(d)),o.a.render(d,l,t)}catch(e){if(!(e instanceof o.a.ParseError))throw e;t.errorCallback("KaTeX auto-render: Failed to parse `"+r[a].data+"` with ",e),n.appendChild(document.createTextNode(r[a].rawData));continue}n.appendChild(l)}return n};t.default=function(e,t){if(!e)throw new Error("No element provided to render");var r={};for(var n in t)t.hasOwnProperty(n)&&(r[n]=t[n]);r.delimiters=r.delimiters||[{left:"$$",right:"$$",display:!0},{left:"\\(",right:"\\)",display:!1},{left:"\\[",right:"\\]",display:!0}],r.ignoredTags=r.ignoredTags||["script","noscript","style","textarea","pre","code","option"],r.ignoredClasses=r.ignoredClasses||[],r.errorCallback=r.errorCallback||console.error,r.macros=r.macros||{},function e(t,r){for(var n=0;n<t.childNodes.length;n++){var o=t.childNodes[n];if(3===o.nodeType){var a=l(o.textContent,r);a&&(n+=a.childNodes.length-1,t.replaceChild(a,o))}else 1===o.nodeType&&function(){var t=" "+o.className+" ";-1===r.ignoredTags.indexOf(o.nodeName.toLowerCase())&&r.ignoredClasses.every(function(e){return-1===t.indexOf(" "+e+" ")})&&e(o,r)}()}}(e,r)}}]).default});

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import katex from '../katex.mjs';
/* eslint no-constant-condition:0 */
const findEndOfMath = function findEndOfMath(delimiter, text, startIndex) {
// Adapted from
// https://github.com/Khan/perseus/blob/master/src/perseus-markdown.jsx
let index = startIndex;
let braceLevel = 0;
const delimLength = delimiter.length;
while (index < text.length) {
const character = text[index];
if (braceLevel <= 0 && text.slice(index, index + delimLength) === delimiter) {
return index;
} else if (character === "\\") {
index++;
} else if (character === "{") {
braceLevel++;
} else if (character === "}") {
braceLevel--;
}
index++;
}
return -1;
};
const splitAtDelimiters = function splitAtDelimiters(startData, leftDelim, rightDelim, display) {
const finalData = [];
for (let i = 0; i < startData.length; i++) {
if (startData[i].type === "text") {
const text = startData[i].data;
let lookingForLeft = true;
let currIndex = 0;
let nextIndex;
nextIndex = text.indexOf(leftDelim);
if (nextIndex !== -1) {
currIndex = nextIndex;
finalData.push({
type: "text",
data: text.slice(0, currIndex)
});
lookingForLeft = false;
}
while (true) {
if (lookingForLeft) {
nextIndex = text.indexOf(leftDelim, currIndex);
if (nextIndex === -1) {
break;
}
finalData.push({
type: "text",
data: text.slice(currIndex, nextIndex)
});
currIndex = nextIndex;
} else {
nextIndex = findEndOfMath(rightDelim, text, currIndex + leftDelim.length);
if (nextIndex === -1) {
break;
}
finalData.push({
type: "math",
data: text.slice(currIndex + leftDelim.length, nextIndex),
rawData: text.slice(currIndex, nextIndex + rightDelim.length),
display: display
});
currIndex = nextIndex + rightDelim.length;
}
lookingForLeft = !lookingForLeft;
}
finalData.push({
type: "text",
data: text.slice(currIndex)
});
} else {
finalData.push(startData[i]);
}
}
return finalData;
};
/* eslint no-console:0 */
const splitWithDelimiters = function splitWithDelimiters(text, delimiters) {
let data = [{
type: "text",
data: text
}];
for (let i = 0; i < delimiters.length; i++) {
const delimiter = delimiters[i];
data = splitAtDelimiters(data, delimiter.left, delimiter.right, delimiter.display || false);
}
return data;
};
/* Note: optionsCopy is mutated by this method. If it is ever exposed in the
* API, we should copy it before mutating.
*/
const renderMathInText = function renderMathInText(text, optionsCopy) {
const data = splitWithDelimiters(text, optionsCopy.delimiters);
if (data.length === 1 && data[0].type === 'text') {
// There is no formula in the text.
// Let's return null which means there is no need to replace
// the current text node with a new one.
return null;
}
const fragment = document.createDocumentFragment();
for (let i = 0; i < data.length; i++) {
if (data[i].type === "text") {
fragment.appendChild(document.createTextNode(data[i].data));
} else {
const span = document.createElement("span");
let math = data[i].data; // Override any display mode defined in the settings with that
// defined by the text itself
optionsCopy.displayMode = data[i].display;
try {
if (optionsCopy.preProcess) {
math = optionsCopy.preProcess(math);
}
katex.render(math, span, optionsCopy);
} catch (e) {
if (!(e instanceof katex.ParseError)) {
throw e;
}
optionsCopy.errorCallback("KaTeX auto-render: Failed to parse `" + data[i].data + "` with ", e);
fragment.appendChild(document.createTextNode(data[i].rawData));
continue;
}
fragment.appendChild(span);
}
}
return fragment;
};
const renderElem = function renderElem(elem, optionsCopy) {
for (let i = 0; i < elem.childNodes.length; i++) {
const childNode = elem.childNodes[i];
if (childNode.nodeType === 3) {
// Text node
const frag = renderMathInText(childNode.textContent, optionsCopy);
if (frag) {
i += frag.childNodes.length - 1;
elem.replaceChild(frag, childNode);
}
} else if (childNode.nodeType === 1) {
// Element node
const className = ' ' + childNode.className + ' ';
const shouldRender = optionsCopy.ignoredTags.indexOf(childNode.nodeName.toLowerCase()) === -1 && optionsCopy.ignoredClasses.every(x => className.indexOf(' ' + x + ' ') === -1);
if (shouldRender) {
renderElem(childNode, optionsCopy);
}
} // Otherwise, it's something else, and ignore it.
}
};
const renderMathInElement = function renderMathInElement(elem, options) {
if (!elem) {
throw new Error("No element provided to render");
}
const optionsCopy = {}; // Object.assign(optionsCopy, option)
for (const option in options) {
if (options.hasOwnProperty(option)) {
optionsCopy[option] = options[option];
}
} // default options
optionsCopy.delimiters = optionsCopy.delimiters || [{
left: "$$",
right: "$$",
display: true
}, {
left: "\\(",
right: "\\)",
display: false
}, // LaTeX uses $…$, but it ruins the display of normal `$` in text:
// {left: "$", right: "$", display: false},
// \[…\] must come last in this array. Otherwise, renderMathInElement
// will search for \[ before it searches for $$ or \(
// That makes it susceptible to finding a \\[0.3em] row delimiter and
// treating it as if it were the start of a KaTeX math zone.
{
left: "\\[",
right: "\\]",
display: true
}];
optionsCopy.ignoredTags = optionsCopy.ignoredTags || ["script", "noscript", "style", "textarea", "pre", "code", "option"];
optionsCopy.ignoredClasses = optionsCopy.ignoredClasses || [];
optionsCopy.errorCallback = optionsCopy.errorCallback || console.error; // Enable sharing of global macros defined via `\gdef` between different
// math elements within a single call to `renderMathInElement`.
optionsCopy.macros = optionsCopy.macros || {};
renderElem(elem, optionsCopy);
};
export default renderMathInElement;

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/* Force selection of entire .katex/.katex-display blocks, so that we can
* copy/paste the entire source code. If you omit this CSS, partial
* selections of a formula will work, but will copy the ugly HTML
* representation instead of the LaTeX source code. (Full selections will
* still produce the LaTeX source code.)
*/
.katex,
.katex-display {
user-select: all;
-moz-user-select: all;
-webkit-user-select: all;
-ms-user-select: all;
}

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(function webpackUniversalModuleDefinition(root, factory) {
if(typeof exports === 'object' && typeof module === 'object')
module.exports = factory();
else if(typeof define === 'function' && define.amd)
define([], factory);
else {
var a = factory();
for(var i in a) (typeof exports === 'object' ? exports : root)[i] = a[i];
}
})((typeof self !== 'undefined' ? self : this), function() {
return /******/ (function(modules) { // webpackBootstrap
/******/ // The module cache
/******/ var installedModules = {};
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/******/ __webpack_require__.m = modules;
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/******/ __webpack_require__.c = installedModules;
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/******/ };
/******/
/******/ // create a fake namespace object
/******/ // mode & 1: value is a module id, require it
/******/ // mode & 2: merge all properties of value into the ns
/******/ // mode & 4: return value when already ns object
/******/ // mode & 8|1: behave like require
/******/ __webpack_require__.t = function(value, mode) {
/******/ if(mode & 1) value = __webpack_require__(value);
/******/ if(mode & 8) return value;
/******/ if((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
/******/ var ns = Object.create(null);
/******/ __webpack_require__.r(ns);
/******/ Object.defineProperty(ns, 'default', { enumerable: true, value: value });
/******/ if(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));
/******/ return ns;
/******/ };
/******/
/******/ // getDefaultExport function for compatibility with non-harmony modules
/******/ __webpack_require__.n = function(module) {
/******/ var getter = module && module.__esModule ?
/******/ function getDefault() { return module['default']; } :
/******/ function getModuleExports() { return module; };
/******/ __webpack_require__.d(getter, 'a', getter);
/******/ return getter;
/******/ };
/******/
/******/ // Object.prototype.hasOwnProperty.call
/******/ __webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
/******/
/******/ // __webpack_public_path__
/******/ __webpack_require__.p = "";
/******/
/******/
/******/ // Load entry module and return exports
/******/ return __webpack_require__(__webpack_require__.s = 1);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/***/ (function(module, exports, __webpack_require__) {
// extracted by mini-css-extract-plugin
/***/ }),
/* 1 */
/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
__webpack_require__.r(__webpack_exports__);
// EXTERNAL MODULE: ./contrib/copy-tex/copy-tex.css
var copy_tex = __webpack_require__(0);
// CONCATENATED MODULE: ./contrib/copy-tex/katex2tex.js
// Set these to how you want inline and display math to be delimited.
var defaultCopyDelimiters = {
inline: ['$', '$'],
// alternative: ['\(', '\)']
display: ['$$', '$$'] // alternative: ['\[', '\]']
}; // Replace .katex elements with their TeX source (<annotation> element).
// Modifies fragment in-place. Useful for writing your own 'copy' handler,
// as in copy-tex.js.
var katexReplaceWithTex = function katexReplaceWithTex(fragment, copyDelimiters) {
if (copyDelimiters === void 0) {
copyDelimiters = defaultCopyDelimiters;
}
// Remove .katex-html blocks that are preceded by .katex-mathml blocks
// (which will get replaced below).
var katexHtml = fragment.querySelectorAll('.katex-mathml + .katex-html');
for (var i = 0; i < katexHtml.length; i++) {
var element = katexHtml[i];
if (element.remove) {
element.remove(null);
} else {
element.parentNode.removeChild(element);
}
} // Replace .katex-mathml elements with their annotation (TeX source)
// descendant, with inline delimiters.
var katexMathml = fragment.querySelectorAll('.katex-mathml');
for (var _i = 0; _i < katexMathml.length; _i++) {
var _element = katexMathml[_i];
var texSource = _element.querySelector('annotation');
if (texSource) {
if (_element.replaceWith) {
_element.replaceWith(texSource);
} else {
_element.parentNode.replaceChild(texSource, _element);
}
texSource.innerHTML = copyDelimiters.inline[0] + texSource.innerHTML + copyDelimiters.inline[1];
}
} // Switch display math to display delimiters.
var displays = fragment.querySelectorAll('.katex-display annotation');
for (var _i2 = 0; _i2 < displays.length; _i2++) {
var _element2 = displays[_i2];
_element2.innerHTML = copyDelimiters.display[0] + _element2.innerHTML.substr(copyDelimiters.inline[0].length, _element2.innerHTML.length - copyDelimiters.inline[0].length - copyDelimiters.inline[1].length) + copyDelimiters.display[1];
}
return fragment;
};
/* harmony default export */ var katex2tex = (katexReplaceWithTex);
// CONCATENATED MODULE: ./contrib/copy-tex/copy-tex.js
// Global copy handler to modify behavior on .katex elements.
document.addEventListener('copy', function (event) {
var selection = window.getSelection();
if (selection.isCollapsed) {
return; // default action OK if selection is empty
}
var fragment = selection.getRangeAt(0).cloneContents();
if (!fragment.querySelector('.katex-mathml')) {
return; // default action OK if no .katex-mathml elements
} // Preserve usual HTML copy/paste behavior.
var html = [];
for (var i = 0; i < fragment.childNodes.length; i++) {
html.push(fragment.childNodes[i].outerHTML);
}
event.clipboardData.setData('text/html', html.join('')); // Rewrite plain-text version.
event.clipboardData.setData('text/plain', katex2tex(fragment).textContent); // Prevent normal copy handling.
event.preventDefault();
});
// CONCATENATED MODULE: ./contrib/copy-tex/copy-tex.webpack.js
/**
* This is the webpack entry point for KaTeX. As ECMAScript doesn't support
* CSS modules natively, a separate entry point is used.
*/
/***/ })
/******/ ])["default"];
});

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.katex,.katex-display{user-select:all;-moz-user-select:all;-webkit-user-select:all;-ms-user-select:all}

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!function(e,t){if("object"==typeof exports&&"object"==typeof module)module.exports=t();else if("function"==typeof define&&define.amd)define([],t);else{var n=t();for(var r in n)("object"==typeof exports?exports:e)[r]=n[r]}}("undefined"!=typeof self?self:this,function(){return function(e){var t={};function n(r){if(t[r])return t[r].exports;var o=t[r]={i:r,l:!1,exports:{}};return e[r].call(o.exports,o,o.exports,n),o.l=!0,o.exports}return n.m=e,n.c=t,n.d=function(e,t,r){n.o(e,t)||Object.defineProperty(e,t,{enumerable:!0,get:r})},n.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},n.t=function(e,t){if(1&t&&(e=n(e)),8&t)return e;if(4&t&&"object"==typeof e&&e&&e.__esModule)return e;var r=Object.create(null);if(n.r(r),Object.defineProperty(r,"default",{enumerable:!0,value:e}),2&t&&"string"!=typeof e)for(var o in e)n.d(r,o,function(t){return e[t]}.bind(null,o));return r},n.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(t,"a",t),t},n.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},n.p="",n(n.s=1)}([function(e,t,n){},function(e,t,n){"use strict";n.r(t);n(0);var r={inline:["$","$"],display:["$$","$$"]},o=function(e,t){void 0===t&&(t=r);for(var n=e.querySelectorAll(".katex-mathml + .katex-html"),o=0;o<n.length;o++){var l=n[o];l.remove?l.remove(null):l.parentNode.removeChild(l)}for(var i=e.querySelectorAll(".katex-mathml"),a=0;a<i.length;a++){var u=i[a],f=u.querySelector("annotation");f&&(u.replaceWith?u.replaceWith(f):u.parentNode.replaceChild(f,u),f.innerHTML=t.inline[0]+f.innerHTML+t.inline[1])}for(var c=e.querySelectorAll(".katex-display annotation"),d=0;d<c.length;d++){var p=c[d];p.innerHTML=t.display[0]+p.innerHTML.substr(t.inline[0].length,p.innerHTML.length-t.inline[0].length-t.inline[1].length)+t.display[1]}return e};document.addEventListener("copy",function(e){var t=window.getSelection();if(!t.isCollapsed){var n=t.getRangeAt(0).cloneContents();if(n.querySelector(".katex-mathml")){for(var r=[],l=0;l<n.childNodes.length;l++)r.push(n.childNodes[l].outerHTML);e.clipboardData.setData("text/html",r.join("")),e.clipboardData.setData("text/plain",o(n).textContent),e.preventDefault()}}})}]).default});

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// Set these to how you want inline and display math to be delimited.
const defaultCopyDelimiters = {
inline: ['$', '$'],
// alternative: ['\(', '\)']
display: ['$$', '$$'] // alternative: ['\[', '\]']
}; // Replace .katex elements with their TeX source (<annotation> element).
// Modifies fragment in-place. Useful for writing your own 'copy' handler,
// as in copy-tex.js.
const katexReplaceWithTex = function katexReplaceWithTex(fragment, copyDelimiters) {
if (copyDelimiters === void 0) {
copyDelimiters = defaultCopyDelimiters;
}
// Remove .katex-html blocks that are preceded by .katex-mathml blocks
// (which will get replaced below).
const katexHtml = fragment.querySelectorAll('.katex-mathml + .katex-html');
for (let i = 0; i < katexHtml.length; i++) {
const element = katexHtml[i];
if (element.remove) {
element.remove(null);
} else {
element.parentNode.removeChild(element);
}
} // Replace .katex-mathml elements with their annotation (TeX source)
// descendant, with inline delimiters.
const katexMathml = fragment.querySelectorAll('.katex-mathml');
for (let i = 0; i < katexMathml.length; i++) {
const element = katexMathml[i];
const texSource = element.querySelector('annotation');
if (texSource) {
if (element.replaceWith) {
element.replaceWith(texSource);
} else {
element.parentNode.replaceChild(texSource, element);
}
texSource.innerHTML = copyDelimiters.inline[0] + texSource.innerHTML + copyDelimiters.inline[1];
}
} // Switch display math to display delimiters.
const displays = fragment.querySelectorAll('.katex-display annotation');
for (let i = 0; i < displays.length; i++) {
const element = displays[i];
element.innerHTML = copyDelimiters.display[0] + element.innerHTML.substr(copyDelimiters.inline[0].length, element.innerHTML.length - copyDelimiters.inline[0].length - copyDelimiters.inline[1].length) + copyDelimiters.display[1];
}
return fragment;
};
document.addEventListener('copy', function (event) {
const selection = window.getSelection();
if (selection.isCollapsed) {
return; // default action OK if selection is empty
}
const fragment = selection.getRangeAt(0).cloneContents();
if (!fragment.querySelector('.katex-mathml')) {
return; // default action OK if no .katex-mathml elements
} // Preserve usual HTML copy/paste behavior.
const html = [];
for (let i = 0; i < fragment.childNodes.length; i++) {
html.push(fragment.childNodes[i].outerHTML);
}
event.clipboardData.setData('text/html', html.join('')); // Rewrite plain-text version.
event.clipboardData.setData('text/plain', katexReplaceWithTex(fragment).textContent); // Prevent normal copy handling.
event.preventDefault();
});

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define(["katex"], factory);
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var a = typeof exports === 'object' ? factory(require("katex")) : factory(root["katex"]);
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module.exports = __WEBPACK_EXTERNAL_MODULE__0__;
/***/ }),
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__webpack_require__.r(__webpack_exports__);
/* harmony import */ var katex__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(0);
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var scripts = document.body.getElementsByTagName("script");
scripts = Array.prototype.slice.call(scripts);
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if (!script.type || !script.type.match(/math\/tex/i)) {
return -1;
}
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katexElement.setAttribute("class", display ? "equation" : "inline-equation");
try {
katex__WEBPACK_IMPORTED_MODULE_0___default.a.render(script.text, katexElement, {
displayMode: display
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} catch (err) {
//console.error(err); linter doesn't like this
katexElement.textContent = script.text;
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script.parentNode.replaceChild(katexElement, script);
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/***/ })
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});

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import katex from '../katex.mjs';
let scripts = document.body.getElementsByTagName("script");
scripts = Array.prototype.slice.call(scripts);
scripts.forEach(function (script) {
if (!script.type || !script.type.match(/math\/tex/i)) {
return -1;
}
const display = script.type.match(/mode\s*=\s*display(;|\s|\n|$)/) != null;
const katexElement = document.createElement(display ? "div" : "span");
katexElement.setAttribute("class", display ? "equation" : "inline-equation");
try {
katex.render(script.text, katexElement, {
displayMode: display
});
} catch (err) {
//console.error(err); linter doesn't like this
katexElement.textContent = script.text;
}
script.parentNode.replaceChild(katexElement, script);
});

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(function webpackUniversalModuleDefinition(root, factory) {
if(typeof exports === 'object' && typeof module === 'object')
module.exports = factory(require("katex"));
else if(typeof define === 'function' && define.amd)
define(["katex"], factory);
else {
var a = typeof exports === 'object' ? factory(require("katex")) : factory(root["katex"]);
for(var i in a) (typeof exports === 'object' ? exports : root)[i] = a[i];
}
})((typeof self !== 'undefined' ? self : this), function(__WEBPACK_EXTERNAL_MODULE__0__) {
return /******/ (function(modules) { // webpackBootstrap
/******/ // The module cache
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/***/ (function(module, exports) {
module.exports = __WEBPACK_EXTERNAL_MODULE__0__;
/***/ }),
/* 1 */
/***/ (function(module, __webpack_exports__, __webpack_require__) {
"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony import */ var katex__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(0);
/* harmony import */ var katex__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(katex__WEBPACK_IMPORTED_MODULE_0__);
/**
* renderA11yString returns a readable string.
*
* In some cases the string will have the proper semantic math
* meaning,:
* renderA11yString("\\frac{1}{2}"")
* -> "start fraction, 1, divided by, 2, end fraction"
*
* However, other cases do not:
* renderA11yString("f(x) = x^2")
* -> "f, left parenthesis, x, right parenthesis, equals, x, squared"
*
* The commas in the string aim to increase ease of understanding
* when read by a screenreader.
*/
// NOTE: since we're importing types here these files won't actually be
// included in the build.
// $FlowIgnore: we import the types directly anyways
var stringMap = {
"(": "left parenthesis",
")": "right parenthesis",
"[": "open bracket",
"]": "close bracket",
"\\{": "left brace",
"\\}": "right brace",
"\\lvert": "open vertical bar",
"\\rvert": "close vertical bar",
"|": "vertical bar",
"\\uparrow": "up arrow",
"\\Uparrow": "up arrow",
"\\downarrow": "down arrow",
"\\Downarrow": "down arrow",
"\\updownarrow": "up down arrow",
"\\leftarrow": "left arrow",
"\\Leftarrow": "left arrow",
"\\rightarrow": "right arrow",
"\\Rightarrow": "right arrow",
"\\langle": "open angle",
"\\rangle": "close angle",
"\\lfloor": "open floor",
"\\rfloor": "close floor",
"\\int": "integral",
"\\intop": "integral",
"\\lim": "limit",
"\\ln": "natural log",
"\\log": "log",
"\\sin": "sine",
"\\cos": "cosine",
"\\tan": "tangent",
"\\cot": "cotangent",
"\\sum": "sum",
"/": "slash",
",": "comma",
".": "point",
"-": "negative",
"+": "plus",
"~": "tilde",
":": "colon",
"?": "question mark",
"'": "apostrophe",
"\\%": "percent",
" ": "space",
"\\ ": "space",
"\\$": "dollar sign",
"\\angle": "angle",
"\\degree": "degree",
"\\circ": "circle",
"\\vec": "vector",
"\\triangle": "triangle",
"\\pi": "pi",
"\\prime": "prime",
"\\infty": "infinity",
"\\alpha": "alpha",
"\\beta": "beta",
"\\gamma": "gamma",
"\\omega": "omega",
"\\theta": "theta",
"\\sigma": "sigma",
"\\lambda": "lambda",
"\\tau": "tau",
"\\Delta": "delta",
"\\delta": "delta",
"\\mu": "mu",
"\\rho": "rho",
"\\nabla": "del",
"\\ell": "ell",
"\\ldots": "dots",
// TODO: add entries for all accents
"\\hat": "hat",
"\\acute": "acute"
};
var powerMap = {
"prime": "prime",
"degree": "degrees",
"circle": "degrees",
"2": "squared",
"3": "cubed"
};
var openMap = {
"|": "open vertical bar",
".": ""
};
var closeMap = {
"|": "close vertical bar",
".": ""
};
var binMap = {
"+": "plus",
"-": "minus",
"\\pm": "plus minus",
"\\cdot": "dot",
"*": "times",
"/": "divided by",
"\\times": "times",
"\\div": "divided by",
"\\circ": "circle",
"\\bullet": "bullet"
};
var relMap = {
"=": "equals",
"\\approx": "approximately equals",
"≠": "does not equal",
"\\geq": "is greater than or equal to",
"\\ge": "is greater than or equal to",
"\\leq": "is less than or equal to",
"\\le": "is less than or equal to",
">": "is greater than",
"<": "is less than",
"\\leftarrow": "left arrow",
"\\Leftarrow": "left arrow",
"\\rightarrow": "right arrow",
"\\Rightarrow": "right arrow",
":": "colon"
};
var accentUnderMap = {
"\\underleftarrow": "left arrow",
"\\underrightarrow": "right arrow",
"\\underleftrightarrow": "left-right arrow",
"\\undergroup": "group",
"\\underlinesegment": "line segment",
"\\utilde": "tilde"
};
var buildString = function buildString(str, type, a11yStrings) {
if (!str) {
return;
}
var ret;
if (type === "open") {
ret = str in openMap ? openMap[str] : stringMap[str] || str;
} else if (type === "close") {
ret = str in closeMap ? closeMap[str] : stringMap[str] || str;
} else if (type === "bin") {
ret = binMap[str] || str;
} else if (type === "rel") {
ret = relMap[str] || str;
} else {
ret = stringMap[str] || str;
} // If the text to add is a number and there is already a string
// in the list and the last string is a number then we should
// combine them into a single number
if (/^\d+$/.test(ret) && a11yStrings.length > 0 && // TODO(kevinb): check that the last item in a11yStrings is a string
// I think we might be able to drop the nested arrays, which would make
// this easier to type - $FlowFixMe
/^\d+$/.test(a11yStrings[a11yStrings.length - 1])) {
a11yStrings[a11yStrings.length - 1] += ret;
} else if (ret) {
a11yStrings.push(ret);
}
};
var buildRegion = function buildRegion(a11yStrings, callback) {
var regionStrings = [];
a11yStrings.push(regionStrings);
callback(regionStrings);
};
var handleObject = function handleObject(tree, a11yStrings, atomType) {
// Everything else is assumed to be an object...
switch (tree.type) {
case "accent":
{
buildRegion(a11yStrings, function (a11yStrings) {
buildA11yStrings(tree.base, a11yStrings, atomType);
a11yStrings.push("with");
buildString(tree.label, "normal", a11yStrings);
a11yStrings.push("on top");
});
break;
}
case "accentUnder":
{
buildRegion(a11yStrings, function (a11yStrings) {
buildA11yStrings(tree.base, a11yStrings, atomType);
a11yStrings.push("with");
buildString(accentUnderMap[tree.label], "normal", a11yStrings);
a11yStrings.push("underneath");
});
break;
}
case "accent-token":
{
// Used internally by accent symbols.
break;
}
case "atom":
{
var text = tree.text;
switch (tree.family) {
case "bin":
{
buildString(text, "bin", a11yStrings);
break;
}
case "close":
{
buildString(text, "close", a11yStrings);
break;
}
// TODO(kevinb): figure out what should be done for inner
case "inner":
{
buildString(tree.text, "inner", a11yStrings);
break;
}
case "open":
{
buildString(text, "open", a11yStrings);
break;
}
case "punct":
{
buildString(text, "punct", a11yStrings);
break;
}
case "rel":
{
buildString(text, "rel", a11yStrings);
break;
}
default:
{
tree.family;
throw new Error("\"" + tree.family + "\" is not a valid atom type");
}
}
break;
}
case "color":
{
var color = tree.color.replace(/katex-/, "");
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start color " + color);
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end color " + color);
});
break;
}
case "color-token":
{
// Used by \color, \colorbox, and \fcolorbox but not directly rendered.
// It's a leaf node and has no children so just break.
break;
}
case "delimsizing":
{
if (tree.delim && tree.delim !== ".") {
buildString(tree.delim, "normal", a11yStrings);
}
break;
}
case "genfrac":
{
buildRegion(a11yStrings, function (regionStrings) {
// genfrac can have unbalanced delimiters
var leftDelim = tree.leftDelim,
rightDelim = tree.rightDelim; // NOTE: Not sure if this is a safe assumption
// hasBarLine true -> fraction, false -> binomial
if (tree.hasBarLine) {
regionStrings.push("start fraction");
leftDelim && buildString(leftDelim, "open", regionStrings);
buildA11yStrings(tree.numer, regionStrings, atomType);
regionStrings.push("divided by");
buildA11yStrings(tree.denom, regionStrings, atomType);
rightDelim && buildString(rightDelim, "close", regionStrings);
regionStrings.push("end fraction");
} else {
regionStrings.push("start binomial");
leftDelim && buildString(leftDelim, "open", regionStrings);
buildA11yStrings(tree.numer, regionStrings, atomType);
regionStrings.push("over");
buildA11yStrings(tree.denom, regionStrings, atomType);
rightDelim && buildString(rightDelim, "close", regionStrings);
regionStrings.push("end binomial");
}
});
break;
}
case "kern":
{
// No op: we don't attempt to present kerning information
// to the screen reader.
break;
}
case "leftright":
{
buildRegion(a11yStrings, function (regionStrings) {
buildString(tree.left, "open", regionStrings);
buildA11yStrings(tree.body, regionStrings, atomType);
buildString(tree.right, "close", regionStrings);
});
break;
}
case "leftright-right":
{
// TODO: double check that this is a no-op
break;
}
case "lap":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "mathord":
{
buildString(tree.text, "normal", a11yStrings);
break;
}
case "op":
{
var body = tree.body,
name = tree.name;
if (body) {
buildA11yStrings(body, a11yStrings, atomType);
} else if (name) {
buildString(name, "normal", a11yStrings);
}
break;
}
case "op-token":
{
// Used internally by operator symbols.
buildString(tree.text, atomType, a11yStrings);
break;
}
case "ordgroup":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "overline":
{
buildRegion(a11yStrings, function (a11yStrings) {
a11yStrings.push("start overline");
buildA11yStrings(tree.body, a11yStrings, atomType);
a11yStrings.push("end overline");
});
break;
}
case "phantom":
{
a11yStrings.push("empty space");
break;
}
case "raisebox":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "rule":
{
a11yStrings.push("rectangle");
break;
}
case "sizing":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "spacing":
{
a11yStrings.push("space");
break;
}
case "styling":
{
// We ignore the styling and just pass through the contents
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "sqrt":
{
buildRegion(a11yStrings, function (regionStrings) {
var body = tree.body,
index = tree.index;
if (index) {
var indexString = flatten(buildA11yStrings(index, [], atomType)).join(",");
if (indexString === "3") {
regionStrings.push("cube root of");
buildA11yStrings(body, regionStrings, atomType);
regionStrings.push("end cube root");
return;
}
regionStrings.push("root");
regionStrings.push("start index");
buildA11yStrings(index, regionStrings, atomType);
regionStrings.push("end index");
return;
}
regionStrings.push("square root of");
buildA11yStrings(body, regionStrings, atomType);
regionStrings.push("end square root");
});
break;
}
case "supsub":
{
var base = tree.base,
sub = tree.sub,
sup = tree.sup;
var isLog = false;
if (base) {
buildA11yStrings(base, a11yStrings, atomType);
isLog = base.type === "op" && base.name === "\\log";
}
if (sub) {
var regionName = isLog ? "base" : "subscript";
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start " + regionName);
buildA11yStrings(sub, regionStrings, atomType);
regionStrings.push("end " + regionName);
});
}
if (sup) {
buildRegion(a11yStrings, function (regionStrings) {
var supString = flatten(buildA11yStrings(sup, [], atomType)).join(",");
if (supString in powerMap) {
regionStrings.push(powerMap[supString]);
return;
}
regionStrings.push("start superscript");
buildA11yStrings(sup, regionStrings, atomType);
regionStrings.push("end superscript");
});
}
break;
}
case "text":
{
// TODO: handle other fonts
if (tree.font === "\\textbf") {
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start bold text");
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end bold text");
});
break;
}
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start text");
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end text");
});
break;
}
case "textord":
{
buildString(tree.text, atomType, a11yStrings);
break;
}
case "smash":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "enclose":
{
// TODO: create a map for these.
// TODO: differentiate between a body with a single atom, e.g.
// "cancel a" instead of "start cancel, a, end cancel"
if (/cancel/.test(tree.label)) {
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start cancel");
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end cancel");
});
break;
} else if (/box/.test(tree.label)) {
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start box");
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end box");
});
break;
} else if (/sout/.test(tree.label)) {
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start strikeout");
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end strikeout");
});
break;
}
throw new Error("KaTeX-a11y: enclose node with " + tree.label + " not supported yet");
}
case "vphantom":
{
throw new Error("KaTeX-a11y: vphantom not implemented yet");
}
case "hphantom":
{
throw new Error("KaTeX-a11y: hphantom not implemented yet");
}
case "operatorname":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "array":
{
throw new Error("KaTeX-a11y: array not implemented yet");
}
case "raw":
{
throw new Error("KaTeX-a11y: raw not implemented yet");
}
case "size":
{
// Although there are nodes of type "size" in the parse tree, they have
// no semantic meaning and should be ignored.
break;
}
case "url":
{
throw new Error("KaTeX-a11y: url not implemented yet");
}
case "tag":
{
throw new Error("KaTeX-a11y: tag not implemented yet");
}
case "verb":
{
buildString("start verbatim", "normal", a11yStrings);
buildString(tree.body, "normal", a11yStrings);
buildString("end verbatim", "normal", a11yStrings);
break;
}
case "environment":
{
throw new Error("KaTeX-a11y: environment not implemented yet");
}
case "horizBrace":
{
buildString("start " + tree.label.slice(1), "normal", a11yStrings);
buildA11yStrings(tree.base, a11yStrings, atomType);
buildString("end " + tree.label.slice(1), "normal", a11yStrings);
break;
}
case "infix":
{
// All infix nodes are replace with other nodes.
break;
}
case "includegraphics":
{
throw new Error("KaTeX-a11y: includegraphics not implemented yet");
}
case "font":
{
// TODO: callout the start/end of specific fonts
// TODO: map \BBb{N} to "the naturals" or something like that
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "href":
{
throw new Error("KaTeX-a11y: href not implemented yet");
}
case "cr":
{
// This is used by environments.
throw new Error("KaTeX-a11y: cr not implemented yet");
}
case "underline":
{
buildRegion(a11yStrings, function (a11yStrings) {
a11yStrings.push("start underline");
buildA11yStrings(tree.body, a11yStrings, atomType);
a11yStrings.push("end underline");
});
break;
}
case "xArrow":
{
throw new Error("KaTeX-a11y: xArrow not implemented yet");
}
case "mclass":
{
// \neq and \ne are macros so we let "htmlmathml" render the mathmal
// side of things and extract the text from that.
var _atomType = tree.mclass.slice(1); // $FlowFixMe: drop the leading "m" from the values in mclass
buildA11yStrings(tree.body, a11yStrings, _atomType);
break;
}
case "mathchoice":
{
// TODO: track which which style we're using, e.g. dispaly, text, etc.
// default to text style if even that may not be the correct style
buildA11yStrings(tree.text, a11yStrings, atomType);
break;
}
case "htmlmathml":
{
buildA11yStrings(tree.mathml, a11yStrings, atomType);
break;
}
case "middle":
{
buildString(tree.delim, atomType, a11yStrings);
break;
}
case "internal":
{
// internal nodes are never included in the parse tree
break;
}
case "html":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
default:
tree.type;
throw new Error("KaTeX a11y un-recognized type: " + tree.type);
}
};
var buildA11yStrings = function buildA11yStrings(tree, a11yStrings, atomType) {
if (a11yStrings === void 0) {
a11yStrings = [];
}
if (tree instanceof Array) {
for (var i = 0; i < tree.length; i++) {
buildA11yStrings(tree[i], a11yStrings, atomType);
}
} else {
handleObject(tree, a11yStrings, atomType);
}
return a11yStrings;
};
var flatten = function flatten(array) {
var result = [];
array.forEach(function (item) {
if (item instanceof Array) {
result = result.concat(flatten(item));
} else {
result.push(item);
}
});
return result;
};
var renderA11yString = function renderA11yString(text, settings) {
var tree = katex__WEBPACK_IMPORTED_MODULE_0___default.a.__parse(text, settings);
var a11yStrings = buildA11yStrings(tree, [], "normal");
return flatten(a11yStrings).join(", ");
};
/* harmony default export */ __webpack_exports__["default"] = (renderA11yString);
/***/ })
/******/ ])["default"];
});

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import katex from '../katex.mjs';
/**
* renderA11yString returns a readable string.
*
* In some cases the string will have the proper semantic math
* meaning,:
* renderA11yString("\\frac{1}{2}"")
* -> "start fraction, 1, divided by, 2, end fraction"
*
* However, other cases do not:
* renderA11yString("f(x) = x^2")
* -> "f, left parenthesis, x, right parenthesis, equals, x, squared"
*
* The commas in the string aim to increase ease of understanding
* when read by a screenreader.
*/
const stringMap = {
"(": "left parenthesis",
")": "right parenthesis",
"[": "open bracket",
"]": "close bracket",
"\\{": "left brace",
"\\}": "right brace",
"\\lvert": "open vertical bar",
"\\rvert": "close vertical bar",
"|": "vertical bar",
"\\uparrow": "up arrow",
"\\Uparrow": "up arrow",
"\\downarrow": "down arrow",
"\\Downarrow": "down arrow",
"\\updownarrow": "up down arrow",
"\\leftarrow": "left arrow",
"\\Leftarrow": "left arrow",
"\\rightarrow": "right arrow",
"\\Rightarrow": "right arrow",
"\\langle": "open angle",
"\\rangle": "close angle",
"\\lfloor": "open floor",
"\\rfloor": "close floor",
"\\int": "integral",
"\\intop": "integral",
"\\lim": "limit",
"\\ln": "natural log",
"\\log": "log",
"\\sin": "sine",
"\\cos": "cosine",
"\\tan": "tangent",
"\\cot": "cotangent",
"\\sum": "sum",
"/": "slash",
",": "comma",
".": "point",
"-": "negative",
"+": "plus",
"~": "tilde",
":": "colon",
"?": "question mark",
"'": "apostrophe",
"\\%": "percent",
" ": "space",
"\\ ": "space",
"\\$": "dollar sign",
"\\angle": "angle",
"\\degree": "degree",
"\\circ": "circle",
"\\vec": "vector",
"\\triangle": "triangle",
"\\pi": "pi",
"\\prime": "prime",
"\\infty": "infinity",
"\\alpha": "alpha",
"\\beta": "beta",
"\\gamma": "gamma",
"\\omega": "omega",
"\\theta": "theta",
"\\sigma": "sigma",
"\\lambda": "lambda",
"\\tau": "tau",
"\\Delta": "delta",
"\\delta": "delta",
"\\mu": "mu",
"\\rho": "rho",
"\\nabla": "del",
"\\ell": "ell",
"\\ldots": "dots",
// TODO: add entries for all accents
"\\hat": "hat",
"\\acute": "acute"
};
const powerMap = {
"prime": "prime",
"degree": "degrees",
"circle": "degrees",
"2": "squared",
"3": "cubed"
};
const openMap = {
"|": "open vertical bar",
".": ""
};
const closeMap = {
"|": "close vertical bar",
".": ""
};
const binMap = {
"+": "plus",
"-": "minus",
"\\pm": "plus minus",
"\\cdot": "dot",
"*": "times",
"/": "divided by",
"\\times": "times",
"\\div": "divided by",
"\\circ": "circle",
"\\bullet": "bullet"
};
const relMap = {
"=": "equals",
"\\approx": "approximately equals",
"≠": "does not equal",
"\\geq": "is greater than or equal to",
"\\ge": "is greater than or equal to",
"\\leq": "is less than or equal to",
"\\le": "is less than or equal to",
">": "is greater than",
"<": "is less than",
"\\leftarrow": "left arrow",
"\\Leftarrow": "left arrow",
"\\rightarrow": "right arrow",
"\\Rightarrow": "right arrow",
":": "colon"
};
const accentUnderMap = {
"\\underleftarrow": "left arrow",
"\\underrightarrow": "right arrow",
"\\underleftrightarrow": "left-right arrow",
"\\undergroup": "group",
"\\underlinesegment": "line segment",
"\\utilde": "tilde"
};
const buildString = (str, type, a11yStrings) => {
if (!str) {
return;
}
let ret;
if (type === "open") {
ret = str in openMap ? openMap[str] : stringMap[str] || str;
} else if (type === "close") {
ret = str in closeMap ? closeMap[str] : stringMap[str] || str;
} else if (type === "bin") {
ret = binMap[str] || str;
} else if (type === "rel") {
ret = relMap[str] || str;
} else {
ret = stringMap[str] || str;
} // If the text to add is a number and there is already a string
// in the list and the last string is a number then we should
// combine them into a single number
if (/^\d+$/.test(ret) && a11yStrings.length > 0 && // TODO(kevinb): check that the last item in a11yStrings is a string
// I think we might be able to drop the nested arrays, which would make
// this easier to type - $FlowFixMe
/^\d+$/.test(a11yStrings[a11yStrings.length - 1])) {
a11yStrings[a11yStrings.length - 1] += ret;
} else if (ret) {
a11yStrings.push(ret);
}
};
const buildRegion = (a11yStrings, callback) => {
const regionStrings = [];
a11yStrings.push(regionStrings);
callback(regionStrings);
};
const handleObject = (tree, a11yStrings, atomType) => {
// Everything else is assumed to be an object...
switch (tree.type) {
case "accent":
{
buildRegion(a11yStrings, a11yStrings => {
buildA11yStrings(tree.base, a11yStrings, atomType);
a11yStrings.push("with");
buildString(tree.label, "normal", a11yStrings);
a11yStrings.push("on top");
});
break;
}
case "accentUnder":
{
buildRegion(a11yStrings, a11yStrings => {
buildA11yStrings(tree.base, a11yStrings, atomType);
a11yStrings.push("with");
buildString(accentUnderMap[tree.label], "normal", a11yStrings);
a11yStrings.push("underneath");
});
break;
}
case "accent-token":
{
// Used internally by accent symbols.
break;
}
case "atom":
{
const text = tree.text;
switch (tree.family) {
case "bin":
{
buildString(text, "bin", a11yStrings);
break;
}
case "close":
{
buildString(text, "close", a11yStrings);
break;
}
// TODO(kevinb): figure out what should be done for inner
case "inner":
{
buildString(tree.text, "inner", a11yStrings);
break;
}
case "open":
{
buildString(text, "open", a11yStrings);
break;
}
case "punct":
{
buildString(text, "punct", a11yStrings);
break;
}
case "rel":
{
buildString(text, "rel", a11yStrings);
break;
}
default:
{
tree.family;
throw new Error(`"${tree.family}" is not a valid atom type`);
}
}
break;
}
case "color":
{
const color = tree.color.replace(/katex-/, "");
buildRegion(a11yStrings, regionStrings => {
regionStrings.push("start color " + color);
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end color " + color);
});
break;
}
case "color-token":
{
// Used by \color, \colorbox, and \fcolorbox but not directly rendered.
// It's a leaf node and has no children so just break.
break;
}
case "delimsizing":
{
if (tree.delim && tree.delim !== ".") {
buildString(tree.delim, "normal", a11yStrings);
}
break;
}
case "genfrac":
{
buildRegion(a11yStrings, regionStrings => {
// genfrac can have unbalanced delimiters
const leftDelim = tree.leftDelim,
rightDelim = tree.rightDelim; // NOTE: Not sure if this is a safe assumption
// hasBarLine true -> fraction, false -> binomial
if (tree.hasBarLine) {
regionStrings.push("start fraction");
leftDelim && buildString(leftDelim, "open", regionStrings);
buildA11yStrings(tree.numer, regionStrings, atomType);
regionStrings.push("divided by");
buildA11yStrings(tree.denom, regionStrings, atomType);
rightDelim && buildString(rightDelim, "close", regionStrings);
regionStrings.push("end fraction");
} else {
regionStrings.push("start binomial");
leftDelim && buildString(leftDelim, "open", regionStrings);
buildA11yStrings(tree.numer, regionStrings, atomType);
regionStrings.push("over");
buildA11yStrings(tree.denom, regionStrings, atomType);
rightDelim && buildString(rightDelim, "close", regionStrings);
regionStrings.push("end binomial");
}
});
break;
}
case "kern":
{
// No op: we don't attempt to present kerning information
// to the screen reader.
break;
}
case "leftright":
{
buildRegion(a11yStrings, regionStrings => {
buildString(tree.left, "open", regionStrings);
buildA11yStrings(tree.body, regionStrings, atomType);
buildString(tree.right, "close", regionStrings);
});
break;
}
case "leftright-right":
{
// TODO: double check that this is a no-op
break;
}
case "lap":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "mathord":
{
buildString(tree.text, "normal", a11yStrings);
break;
}
case "op":
{
const body = tree.body,
name = tree.name;
if (body) {
buildA11yStrings(body, a11yStrings, atomType);
} else if (name) {
buildString(name, "normal", a11yStrings);
}
break;
}
case "op-token":
{
// Used internally by operator symbols.
buildString(tree.text, atomType, a11yStrings);
break;
}
case "ordgroup":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "overline":
{
buildRegion(a11yStrings, function (a11yStrings) {
a11yStrings.push("start overline");
buildA11yStrings(tree.body, a11yStrings, atomType);
a11yStrings.push("end overline");
});
break;
}
case "phantom":
{
a11yStrings.push("empty space");
break;
}
case "raisebox":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "rule":
{
a11yStrings.push("rectangle");
break;
}
case "sizing":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "spacing":
{
a11yStrings.push("space");
break;
}
case "styling":
{
// We ignore the styling and just pass through the contents
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "sqrt":
{
buildRegion(a11yStrings, regionStrings => {
const body = tree.body,
index = tree.index;
if (index) {
const indexString = flatten(buildA11yStrings(index, [], atomType)).join(",");
if (indexString === "3") {
regionStrings.push("cube root of");
buildA11yStrings(body, regionStrings, atomType);
regionStrings.push("end cube root");
return;
}
regionStrings.push("root");
regionStrings.push("start index");
buildA11yStrings(index, regionStrings, atomType);
regionStrings.push("end index");
return;
}
regionStrings.push("square root of");
buildA11yStrings(body, regionStrings, atomType);
regionStrings.push("end square root");
});
break;
}
case "supsub":
{
const base = tree.base,
sub = tree.sub,
sup = tree.sup;
let isLog = false;
if (base) {
buildA11yStrings(base, a11yStrings, atomType);
isLog = base.type === "op" && base.name === "\\log";
}
if (sub) {
const regionName = isLog ? "base" : "subscript";
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push(`start ${regionName}`);
buildA11yStrings(sub, regionStrings, atomType);
regionStrings.push(`end ${regionName}`);
});
}
if (sup) {
buildRegion(a11yStrings, function (regionStrings) {
const supString = flatten(buildA11yStrings(sup, [], atomType)).join(",");
if (supString in powerMap) {
regionStrings.push(powerMap[supString]);
return;
}
regionStrings.push("start superscript");
buildA11yStrings(sup, regionStrings, atomType);
regionStrings.push("end superscript");
});
}
break;
}
case "text":
{
// TODO: handle other fonts
if (tree.font === "\\textbf") {
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start bold text");
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end bold text");
});
break;
}
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start text");
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end text");
});
break;
}
case "textord":
{
buildString(tree.text, atomType, a11yStrings);
break;
}
case "smash":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "enclose":
{
// TODO: create a map for these.
// TODO: differentiate between a body with a single atom, e.g.
// "cancel a" instead of "start cancel, a, end cancel"
if (/cancel/.test(tree.label)) {
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start cancel");
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end cancel");
});
break;
} else if (/box/.test(tree.label)) {
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start box");
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end box");
});
break;
} else if (/sout/.test(tree.label)) {
buildRegion(a11yStrings, function (regionStrings) {
regionStrings.push("start strikeout");
buildA11yStrings(tree.body, regionStrings, atomType);
regionStrings.push("end strikeout");
});
break;
}
throw new Error(`KaTeX-a11y: enclose node with ${tree.label} not supported yet`);
}
case "vphantom":
{
throw new Error("KaTeX-a11y: vphantom not implemented yet");
}
case "hphantom":
{
throw new Error("KaTeX-a11y: hphantom not implemented yet");
}
case "operatorname":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "array":
{
throw new Error("KaTeX-a11y: array not implemented yet");
}
case "raw":
{
throw new Error("KaTeX-a11y: raw not implemented yet");
}
case "size":
{
// Although there are nodes of type "size" in the parse tree, they have
// no semantic meaning and should be ignored.
break;
}
case "url":
{
throw new Error("KaTeX-a11y: url not implemented yet");
}
case "tag":
{
throw new Error("KaTeX-a11y: tag not implemented yet");
}
case "verb":
{
buildString(`start verbatim`, "normal", a11yStrings);
buildString(tree.body, "normal", a11yStrings);
buildString(`end verbatim`, "normal", a11yStrings);
break;
}
case "environment":
{
throw new Error("KaTeX-a11y: environment not implemented yet");
}
case "horizBrace":
{
buildString(`start ${tree.label.slice(1)}`, "normal", a11yStrings);
buildA11yStrings(tree.base, a11yStrings, atomType);
buildString(`end ${tree.label.slice(1)}`, "normal", a11yStrings);
break;
}
case "infix":
{
// All infix nodes are replace with other nodes.
break;
}
case "includegraphics":
{
throw new Error("KaTeX-a11y: includegraphics not implemented yet");
}
case "font":
{
// TODO: callout the start/end of specific fonts
// TODO: map \BBb{N} to "the naturals" or something like that
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "href":
{
throw new Error("KaTeX-a11y: href not implemented yet");
}
case "cr":
{
// This is used by environments.
throw new Error("KaTeX-a11y: cr not implemented yet");
}
case "underline":
{
buildRegion(a11yStrings, function (a11yStrings) {
a11yStrings.push("start underline");
buildA11yStrings(tree.body, a11yStrings, atomType);
a11yStrings.push("end underline");
});
break;
}
case "xArrow":
{
throw new Error("KaTeX-a11y: xArrow not implemented yet");
}
case "mclass":
{
// \neq and \ne are macros so we let "htmlmathml" render the mathmal
// side of things and extract the text from that.
const atomType = tree.mclass.slice(1); // $FlowFixMe: drop the leading "m" from the values in mclass
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
case "mathchoice":
{
// TODO: track which which style we're using, e.g. dispaly, text, etc.
// default to text style if even that may not be the correct style
buildA11yStrings(tree.text, a11yStrings, atomType);
break;
}
case "htmlmathml":
{
buildA11yStrings(tree.mathml, a11yStrings, atomType);
break;
}
case "middle":
{
buildString(tree.delim, atomType, a11yStrings);
break;
}
case "internal":
{
// internal nodes are never included in the parse tree
break;
}
case "html":
{
buildA11yStrings(tree.body, a11yStrings, atomType);
break;
}
default:
tree.type;
throw new Error("KaTeX a11y un-recognized type: " + tree.type);
}
};
const buildA11yStrings = function buildA11yStrings(tree, a11yStrings, atomType) {
if (a11yStrings === void 0) {
a11yStrings = [];
}
if (tree instanceof Array) {
for (let i = 0; i < tree.length; i++) {
buildA11yStrings(tree[i], a11yStrings, atomType);
}
} else {
handleObject(tree, a11yStrings, atomType);
}
return a11yStrings;
};
const flatten = function flatten(array) {
let result = [];
array.forEach(function (item) {
if (item instanceof Array) {
result = result.concat(flatten(item));
} else {
result.push(item);
}
});
return result;
};
const renderA11yString = function renderA11yString(text, settings) {
const tree = katex.__parse(text, settings);
const a11yStrings = buildA11yStrings(tree, [], "normal");
return flatten(a11yStrings).join(", ");
};
export default renderA11yString;

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