client,server: Allow disabling syntax highlight

src/public/app/widgets/type_widgets/editable_text.js

@@ -11,6 +11,7 @@ import link from "../../services/link.js";
 import appContext from "../../components/app_context.js";
 import dialogService from "../../services/dialog.js";
 import { initSyntaxHighlighting } from "./ckeditor/syntax_highlight.js";
+import options from "../../services/options.js";
 
 const ENABLE_INSPECTOR = false;
 
@@ -169,7 +170,10 @@ export default class EditableTextTypeWidget extends AbstractTextTypeWidget {
 
         this.watchdog.setCreator(async (elementOrData, editorConfig) => {
             const editor = await BalloonEditor.create(elementOrData, editorConfig);
-            initSyntaxHighlighting(editor);
+
+            if (options.get("codeBlockTheme") !== "none") {
+                initSyntaxHighlighting(editor);
+            }
 
             editor.model.document.on('change:data', () => this.spacedUpdate.scheduleUpdate());
 

src/services/code_block_theme.ts

@@ -1,9 +1,10 @@
 import fs from "fs";
 import themeNames from "./code_block_theme_names.json" assert { type: "json" }
+import { t } from "i18next";
 
 export function listSyntaxHighlightingThemes() {
     const path = "node_modules/@highlightjs/cdn-assets/styles";
-    const allThemes = fs
+    const systemThemes = fs
         .readdirSync(path)
         .filter((el) => el.endsWith(".min.css"))
         .map((name) => {
@@ -19,5 +20,11 @@ export function listSyntaxHighlightingThemes() {
                 title: title
             };
         });
-    return allThemes;
+    return [
+        {
+            val: "none",
+            title: t("code_block.theme_none")
+        },
+        ...systemThemes
+    ];
 }

translations/en/server.json

@@ -183,5 +183,8 @@
   },
   "special_notes": {
     "search_prefix": "Search:"
+  },
+  "code_block": {
+    "theme_none": "None"
   }
 }

translations/ro/server.json

@@ -183,5 +183,8 @@
   },
   "special_notes": {
     "search_prefix": "Căutare:"
+  },
+  "code_block": {
+    "theme_none": "Niciuna"
   }
 }