Reorg and cleanup of economics section of docs (#14868)

* reorg validator economics

* overview cleanup

* terminology

* terminology formatting

* katex for docusaurus

* adjusted staking yield writeup

* more reorg

* move section header

* rm unlinked mds

* add new mds

* Update docs/src/inflation/terminology.md

Co-authored-by: Dan Albert <dan@solana.com>

* Update docs/src/inflation/terminology.md

Co-authored-by: Dan Albert <dan@solana.com>

* Update docs/src/inflation/terminology.md

Co-authored-by: Dan Albert <dan@solana.com>

* Update docs/src/inflation/terminology.md

Co-authored-by: Dan Albert <dan@solana.com>

* Update docs/src/inflation/terminology.md

Co-authored-by: Dan Albert <dan@solana.com>

* Update docs/src/transaction_fees.md

Co-authored-by: Dan Albert <dan@solana.com>

* addressing Dans comments in #14868

* incorporating pr commits

* trailing whitespaces

* more trailing whitespaces

* remove services link and add plot

* add plots

Co-authored-by: Dan Albert <dan@solana.com>
This commit is contained in:
Eric Williams
2021-01-27 22:54:00 +01:00
committed by GitHub
parent 577310380a
commit 5594a7122d
99 changed files with 44906 additions and 319 deletions

350
docs/static/katex/contrib/auto-render.js vendored Normal file
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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"]);
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__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_);
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var findEndOfMath = function findEndOfMath(delimiter, text, startIndex) {
// Adapted from
// https://github.com/Khan/perseus/blob/master/src/perseus-markdown.jsx
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type: "text",
data: text.slice(0, currIndex)
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}
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type: "text",
data: text.slice(currIndex, nextIndex)
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currIndex = nextIndex;
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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;
};
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// 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;
};
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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.
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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
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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) {
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// 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.
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if (!elem) {
throw new Error("No element provided to render");
}
var optionsCopy = {}; // Object.assign(optionsCopy, option)
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optionsCopy[option] = options[option];
}
} // default options
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left: "$$",
right: "$$",
display: true
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left: "\\(",
right: "\\)",
display: false
}, // LaTeX uses $…$, but it ruins the display of normal `$` in text:
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right: "\\]",
display: true
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optionsCopy.ignoredClasses = optionsCopy.ignoredClasses || [];
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renderElem(elem, optionsCopy);
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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
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* 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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"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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// 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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(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
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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);
scripts.forEach(function (script) {
if (!script.type || !script.type.match(/math\/tex/i)) {
return -1;
}
var display = script.type.match(/mode\s*=\s*display(;|\s|\n|$)/) != null;
var katexElement = document.createElement(display ? "div" : "span");
katexElement.setAttribute("class", display ? "equation" : "inline-equation");
try {
katex__WEBPACK_IMPORTED_MODULE_0___default.a.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);
});
/***/ })
/******/ ])["default"];
});

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!function(e,t){if("object"==typeof exports&&"object"==typeof module)module.exports=t(require("katex"));else if("function"==typeof define&&define.amd)define(["katex"],t);else{var r="object"==typeof exports?t(require("katex")):t(e.katex);for(var n in r)("object"==typeof exports?exports:e)[n]=r[n]}}("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),u=document.body.getElementsByTagName("script");(u=Array.prototype.slice.call(u)).forEach(function(e){if(!e.type||!e.type.match(/math\/tex/i))return-1;var t=null!=e.type.match(/mode\s*=\s*display(;|\s|\n|$)/),r=document.createElement(t?"div":"span");r.setAttribute("class",t?"equation":"inline-equation");try{o.a.render(e.text,r,{displayMode:t})}catch(t){r.textContent=e.text}e.parentNode.replaceChild(r,e)})}]).default});

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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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if(typeof exports === 'object' && typeof module === 'object')
module.exports = factory(require("katex"));
else if(typeof define === 'function' && define.amd)
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else {
var a = typeof exports === 'object' ? factory(require("katex")) : factory(root["katex"]);
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__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;