From d1c343dd11d6406311da02276b3f5bd50657fd63 Mon Sep 17 00:00:00 2001
From: Patrick Ziegler <ziegler.patrick@hotmail.de>
Date: Mon, 16 Sep 2024 22:30:09 +0200
Subject: [PATCH] Use CopyOnWriteArrayList in LayoutNotifier

See https://github.com/eclipse/gef/issues/120
---
 org.eclipse.draw2d/src/org/eclipse/draw2d/Figure.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/org.eclipse.draw2d/src/org/eclipse/draw2d/Figure.java b/org.eclipse.draw2d/src/org/eclipse/draw2d/Figure.java
index 71d3accc9..05b981ab3 100644
--- a/org.eclipse.draw2d/src/org/eclipse/draw2d/Figure.java
+++ b/org.eclipse.draw2d/src/org/eclipse/draw2d/Figure.java
@@ -21,6 +21,7 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.Objects;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.SWTException;
@@ -2100,7 +2101,7 @@ public boolean prune(IFigure f) {
 	final class LayoutNotifier implements LayoutManager {
 
 		LayoutManager realLayout;
-		List<LayoutListener> listeners = new ArrayList<>(1);
+		List<LayoutListener> listeners = new CopyOnWriteArrayList<>();
 
 		LayoutNotifier(LayoutManager layout, LayoutListener listener) {
 			realLayout = layout;