From f44fbde5151c42f874401dae1a6e814177eeec25 Mon Sep 17 00:00:00 2001
From: weisj <31143295+weisJ@users.noreply.github.com>
Date: Sun, 1 Aug 2021 12:10:11 +0200
Subject: [PATCH] Fail Laf installation if laf is currently being installed.

---
 .../main/java/com/github/weisj/darklaf/LafInstaller.java   | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/core/src/main/java/com/github/weisj/darklaf/LafInstaller.java b/core/src/main/java/com/github/weisj/darklaf/LafInstaller.java
index 20793496..3c372f06 100644
--- a/core/src/main/java/com/github/weisj/darklaf/LafInstaller.java
+++ b/core/src/main/java/com/github/weisj/darklaf/LafInstaller.java
@@ -22,6 +22,7 @@
 package com.github.weisj.darklaf;
 
 import java.awt.Window;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -38,10 +39,14 @@ import com.github.weisj.darklaf.util.LogUtil;
 final class LafInstaller {
 
     private static final Logger LOGGER = LogUtil.getLogger(LafManager.class);
+    private static final AtomicBoolean isInstalling = new AtomicBoolean(false);
     private static final ThemeEventSupport<ThemeChangeEvent, ThemeChangeListener> eventSupport =
             new ThemeEventSupport<>();
 
     void install(final Theme theme) {
+        if (!isInstalling.compareAndSet(false, true)) {
+            throw new IllegalStateException("Can't install Laf while installation is in progress");
+        }
         try {
             LOGGER.fine(() -> "Installing theme " + theme);
             LafTransition transition = LafTransition.showSnapshot();
@@ -51,6 +56,8 @@ final class LafInstaller {
             notifyThemeInstalled(theme);
         } catch (final UnsupportedLookAndFeelException e) {
             LOGGER.log(Level.SEVERE, "Could not install LaF", e);
+        } finally {
+            isInstalling.set(false);
         }
     }