From 9a31cbdc52f8ee0ea2326c3b6461ac5673826594 Mon Sep 17 00:00:00 2001
From: weisj <31143295+weisJ@users.noreply.github.com>
Date: Sun, 1 Aug 2021 12:27:07 +0200
Subject: [PATCH] Dispatch events on a copy of the listener list

This allows for listeners to be removed/added while dispatching.
---
 .../weisj/darklaf/theme/event/ThemeEventSupport.java      | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/theme/src/main/java/com/github/weisj/darklaf/theme/event/ThemeEventSupport.java b/theme/src/main/java/com/github/weisj/darklaf/theme/event/ThemeEventSupport.java
index 13d50812..0a91fbb5 100644
--- a/theme/src/main/java/com/github/weisj/darklaf/theme/event/ThemeEventSupport.java
+++ b/theme/src/main/java/com/github/weisj/darklaf/theme/event/ThemeEventSupport.java
@@ -43,8 +43,10 @@ public class ThemeEventSupport<E extends ThemeEvent, T extends ThemeEventListene
     }
 
     public void dispatchEvent(final E event, final BiConsumer<T, E> consumer) {
-        listenerList.forEach(listener -> {
-            if (listener != null) consumer.accept(listener, event);
-        });
+        synchronized (listenerList) {
+            new ArrayList<>(listenerList).forEach(listener -> {
+                if (listener != null) consumer.accept(listener, event);
+            });
+        }
     }
 }