From faa0ef8bfa3a3b78990b07027c9db0b525e52785 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philipp=20Ku=CC=88hn?= <kontakt@philipp-kuehn.com>
Date: Fri, 2 Apr 2021 22:21:17 +0200
Subject: [PATCH] check for language in highlighting

---
 .../extension-code-block-lowlight/src/lowlight-plugin.ts  | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/packages/extension-code-block-lowlight/src/lowlight-plugin.ts b/packages/extension-code-block-lowlight/src/lowlight-plugin.ts
index c8c47454..ef4dfeb0 100644
--- a/packages/extension-code-block-lowlight/src/lowlight-plugin.ts
+++ b/packages/extension-code-block-lowlight/src/lowlight-plugin.ts
@@ -48,7 +48,13 @@ function getDecorations({ doc, name }: { doc: ProsemirrorNode, name: string}) {
 
   blocks.forEach(block => {
     let startPos = block.pos + 1
-    const nodes = low.highlightAuto(block.node.textContent).value
+    const { language } = block.node.attrs
+    // TODO: add missing type for `listLanguages`
+    // @ts-ignore
+    const languages = low.listLanguages() as string[]
+    const nodes = language && languages.includes(language)
+      ? low.highlight(language, block.node.textContent).value
+      : low.highlightAuto(block.node.textContent).value
 
     parseNodes(nodes)
       .flat()