From af434d021663dc18df90c2ee0639dc9b027842c4 Mon Sep 17 00:00:00 2001
From: Dan Brown <ssddanbrown@googlemail.com>
Date: Tue, 27 Sep 2022 18:44:06 +0100
Subject: [PATCH] Fixed custom code theme not showing in WYSIWYG

Fixes #3753
Was caused by not including added styles to the code block shadow root.
---
 resources/js/wysiwyg/plugin-codeeditor.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/resources/js/wysiwyg/plugin-codeeditor.js b/resources/js/wysiwyg/plugin-codeeditor.js
index b9fc355e1..5377f564e 100644
--- a/resources/js/wysiwyg/plugin-codeeditor.js
+++ b/resources/js/wysiwyg/plugin-codeeditor.js
@@ -39,16 +39,16 @@ function defineCodeBlockCustomElement(editor) {
         constructor() {
             super();
             this.attachShadow({mode: 'open'});
-            const linkElem = document.createElement('link');
-            linkElem.setAttribute('rel', 'stylesheet');
-            linkElem.setAttribute('href', window.baseUrl('/dist/styles.css'));
+
+            const stylesToCopy = document.querySelectorAll('link[rel="stylesheet"]:not([media="print"])');
+            const copiedStyles = Array.from(stylesToCopy).map(styleEl => styleEl.cloneNode(false));
 
             const cmContainer = document.createElement('div');
             cmContainer.style.pointerEvents = 'none';
             cmContainer.contentEditable = 'false';
             cmContainer.classList.add('CodeMirrorContainer');
 
-            this.shadowRoot.append(linkElem, cmContainer);
+            this.shadowRoot.append(...copiedStyles, cmContainer);
         }
 
         getLanguage() {