ignoredHighlightLanguages now works for supported langs

Resolves #2956

Author: Gerrit0

CHANGELOG.md

@@ -7,6 +7,8 @@ title: Changelog
 ### Bug Fixes
 
 - References to type aliases defined as mapped types will now correctly create a reference to the type alias, #2954.
+- `ignoredHighlightLanguages` can now be used to prevent warnings for codeblocks containing languages
+  which are supported by Shiki but are not loaded, #2956.
 
 ## v0.28.4 (2025-05-04)
 

src/lib/output/themes/MarkedPlugin.tsx

@@ -88,21 +88,21 @@ export class MarkedPlugin extends ContextAwareRendererComponent {
         lang = lang || "typescript";
         lang = lang.toLowerCase();
         if (!isSupportedLanguage(lang)) {
-            this.application.logger.warn(
-                i18n.unsupported_highlight_language_0_not_highlighted_in_comment_for_1(
-                    lang,
-                    getFriendlyFullName(this.page?.model || { name: "(unknown)" }),
-                ),
-            );
-            return text;
-        }
-        if (!isLoadedLanguage(lang)) {
-            this.application.logger.warn(
-                i18n.unloaded_language_0_not_highlighted_in_comment_for_1(
-                    lang,
-                    getFriendlyFullName(this.page?.model || { name: "(unknown)" }),
-                ),
-            );
+            if (isLoadedLanguage(lang)) {
+                this.application.logger.warn(
+                    i18n.unloaded_language_0_not_highlighted_in_comment_for_1(
+                        lang,
+                        getFriendlyFullName(this.page?.model || { name: "(unknown)" }),
+                    ),
+                );
+            } else {
+                this.application.logger.warn(
+                    i18n.unsupported_highlight_language_0_not_highlighted_in_comment_for_1(
+                        lang,
+                        getFriendlyFullName(this.page?.model || { name: "(unknown)" }),
+                    ),
+                );
+            }
             return text;
         }
 

src/lib/utils/highlighter.tsx

@@ -162,8 +162,12 @@ export async function loadHighlighter(
     highlighter = new ShikiHighlighter(hl, lightTheme, darkTheme);
 }
 
+function isPlainLanguage(lang: string) {
+    return ignoredLanguages?.includes(lang) || plaintextLanguages.includes(lang);
+}
+
 export function isSupportedLanguage(lang: string) {
-    return ignoredLanguages?.includes(lang) || getSupportedLanguages().includes(lang);
+    return isPlainLanguage(lang) || supportedLanguages.includes(lang);
 }
 
 export function getSupportedLanguages(): string[] {
@@ -175,9 +179,7 @@ export function getSupportedThemes(): string[] {
 }
 
 export function isLoadedLanguage(lang: string): boolean {
-    return (
-        isSupportedLanguage(lang) || highlighter?.supports(lang) || false
-    );
+    return isPlainLanguage(lang) || highlighter?.supports(lang) || false;
 }
 
 export function highlight(code: string, lang: string): string {