FIX: adds katex support for chat (#88)
Also drops jquery support and uses `decorateCookedElement` instead of `decorateCooked` for posts.
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@ -1,48 +1,53 @@
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import $ from "jquery";
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import loadScript from "discourse/lib/load-script";
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import { withPluginApi } from "discourse/lib/plugin-api";
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function ensureKaTeX() {
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return loadScript("/plugins/discourse-math/katex/katex.min.js").then(() => {
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return loadScript("/plugins/discourse-math/katex/katex.min.css", {
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async function ensureKaTeX() {
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try {
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await loadScript("/plugins/discourse-math/katex/katex.min.js");
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await loadScript("/plugins/discourse-math/katex/katex.min.css", {
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css: true,
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})
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.then(() => {
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return loadScript("/plugins/discourse-math/katex/mhchem.min.js");
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})
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.then(() => {
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return loadScript("/plugins/discourse-math/katex/copy-tex.min.js");
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});
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});
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await loadScript("/plugins/discourse-math/katex/mhchem.min.js");
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await loadScript("/plugins/discourse-math/katex/copy-tex.min.js");
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} catch (e) {
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// eslint-disable-next-line no-console
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console.error("Failed to load KaTeX dependencies.", e);
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}
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}
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function decorate(elem, katexOpts) {
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const $elem = $(elem);
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katexOpts["displayMode"] = elem.tagName === "DIV";
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if ($elem.data("applied-katex")) {
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if (elem.dataset.appliedKatex) {
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return;
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}
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elem.dataset.appliedKatex = true;
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if (!elem.classList.contains("math")) {
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return;
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}
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$elem.data("applied-katex", true);
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if ($elem.hasClass("math")) {
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const tag = elem.tagName === "DIV" ? "div" : "span";
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const displayClass = tag === "div" ? "block-math" : "inline-math";
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const text = $elem.text();
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$elem.addClass(`math-container ${displayClass} katex-math`).text("");
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const text = elem.textContent;
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elem.classList.add("math-container", displayClass, "katex-math");
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elem.textContent = "";
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window.katex.render(text, elem, katexOpts);
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}
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}
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function katex($elem) {
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if (!$elem || !$elem.find) {
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async function katex(elem) {
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if (!elem) {
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return;
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}
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const mathElems = $elem.find(".math");
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const mathElems = elem.querySelectorAll(".math");
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if (!mathElems.length > 0) {
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return;
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}
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await ensureKaTeX();
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if (mathElems.length > 0) {
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ensureKaTeX().then(() => {
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// enable persistent macros with are disabled by default: https://katex.org/docs/api.html#persistent-macros
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// also enable equation labelling and referencing which are disabled by default
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// both of these are enabled in mathjax by default, so now the katex implementation is (more) mathjax compatible
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@ -55,18 +60,25 @@ function katex($elem) {
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},
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displayMode: false,
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};
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mathElems.each((idx, elem) => decorate(elem, katexOpts));
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});
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}
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mathElems.forEach((mathElem) => decorate(mathElem, katexOpts));
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}
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function initializeMath(api) {
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api.decorateCooked(
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api.decorateCookedElement(
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function (elem) {
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katex(elem);
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},
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{ id: "katex" }
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);
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if (api.decorateChatMessage) {
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api.decorateChatMessage(
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(element) => {
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katex(element);
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},
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{ id: "katex-chat" }
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);
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}
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}
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export default {
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