From c4cd84dcc884469a0d84e2bec239b2fc3596c44f Mon Sep 17 00:00:00 2001
From: Andrew <80933354+ndrooo@users.noreply.github.com>
Date: Sat, 24 Aug 2024 17:13:55 +0000
Subject: [PATCH] fix: Add a wrapper element to dates in PageList. (#1345)

---
 quartz/plugins/transformers/latex.ts |   69 +++++++++++++++++++++-------------
 1 files changed, 43 insertions(+), 26 deletions(-)

diff --git a/quartz/plugins/transformers/latex.ts b/quartz/plugins/transformers/latex.ts
index f4155f6..28b4d50 100644
--- a/quartz/plugins/transformers/latex.ts
+++ b/quartz/plugins/transformers/latex.ts
@@ -1,34 +1,51 @@
-import { PluggableList } from "unified"
 import remarkMath from "remark-math"
-import rehypeKatex from 'rehype-katex'
-import { StaticResources } from "../../resources"
+import rehypeKatex from "rehype-katex"
+import rehypeMathjax from "rehype-mathjax/svg"
 import { QuartzTransformerPlugin } from "../types"
 
-export class Katex extends QuartzTransformerPlugin {
-  name = "Katex"
-  markdownPlugins(): PluggableList {
-    return [remarkMath]
-  }
+interface Options {
+  renderEngine: "katex" | "mathjax"
+  customMacros: MacroType
+}
 
-  htmlPlugins(): PluggableList {
-    return [
-      [rehypeKatex, {
-        output: 'html',
-      }]
-    ]
-  }
+interface MacroType {
+  [key: string]: string
+}
 
-  externalResources: Partial<StaticResources> = {
-    css: [
-      // base css
-      "https://cdn.jsdelivr.net/npm/katex@0.16.0/dist/katex.min.css",
-    ],
-    js: [
-      {
-        // fix copy behaviour: https://github.com/KaTeX/KaTeX/blob/main/contrib/copy-tex/README.md
-        src: "https://cdn.jsdelivr.net/npm/katex@0.16.7/dist/contrib/copy-tex.min.js",
-        loadTime: "afterDOMReady"
+export const Latex: QuartzTransformerPlugin<Partial<Options>> = (opts) => {
+  const engine = opts?.renderEngine ?? "katex"
+  const macros = opts?.customMacros ?? {}
+  return {
+    name: "Latex",
+    markdownPlugins() {
+      return [remarkMath]
+    },
+    htmlPlugins() {
+      if (engine === "katex") {
+        return [[rehypeKatex, { output: "html", macros }]]
+      } else {
+        return [[rehypeMathjax, { macros }]]
       }
-    ]
+    },
+    externalResources() {
+      if (engine === "katex") {
+        return {
+          css: [
+            // base css
+            "https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.16.9/katex.min.css",
+          ],
+          js: [
+            {
+              // fix copy behaviour: https://github.com/KaTeX/KaTeX/blob/main/contrib/copy-tex/README.md
+              src: "https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.16.9/contrib/copy-tex.min.js",
+              loadTime: "afterDOMReady",
+              contentType: "external",
+            },
+          ],
+        }
+      } else {
+        return {}
+      }
+    },
   }
 }

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