chore(highlightjs): basic integration

packages/highlightjs/src/index.ts

@@ -1,3 +1,46 @@
 import hljs from "../node_modules/highlight.js/es/core.js";
+import type { MimeType } from "@triliumnext/commons";
+import definitions from "./syntax_highlighting.js";
+import { type HighlightOptions } from "highlight.js";
 
-export const { highlight, highlightAuto } = hljs;
+const registeredMimeTypes = new Set<string>();
+const unsupportedMimeTypes = new Set<string>();
+
+export async function ensureMimeTypes(mimeTypes: MimeType[]) {
+    for (const mimeType of mimeTypes) {
+        if (!mimeType.enabled) {
+            continue;
+        }
+
+        const mime = mimeType.mime;
+        if (registeredMimeTypes.has(mime)) {
+            continue;
+        }
+
+        registeredMimeTypes.add(mime);
+        const loader = definitions[mime];
+        if (!loader) {
+            unsupportedMimeTypes.add(mime);
+            continue;
+        }
+
+        const language = (await loader).default;
+        console.info(`Registered highlighting for ${mime}.`);
+        hljs.registerLanguage(mime, language);
+    }
+}
+
+export function highlight(code: string, options: HighlightOptions) {
+    if (unsupportedMimeTypes.has(options.language)) {
+        return null;
+    }
+
+    if (!registeredMimeTypes.has(options.language)) {
+        console.warn(`Unable to find highlighting for ${code}.`);
+        return null;
+    }
+
+    return hljs.highlight(code, options);
+}
+
+export const { highlightAuto } = hljs;