Window decorations: do not exit application with `UnsatisfiedLinkErro…

…r` in case that FlatLaf DLL cannot be executed because of restrictions on temporary directory (issue #436)

CHANGELOG.md

@@ -5,7 +5,7 @@ FlatLaf Change Log
 
 #### Fixed bugs
 
-- Linux: Fixed font problems when running on Oracle Java 8 (OpenJDK 8 is not
+- Linux: Fixed font problems when running on Oracle Java (OpenJDK is not
   affected):
   - oversized text if system font is "Inter" (issue #427)
   - missing text if system font is "Cantarell" (on Fedora)
@@ -14,6 +14,10 @@ FlatLaf Change Log
   on AWT thread. (issue #432)
 - macOS: Fixed `NullPointerException` when using AWT component
   `java.awt.Choice`. (issue #439)
+- Native window decorations: Do not exit application with `UnsatisfiedLinkError`
+  in case that FlatLaf DLL cannot be executed because of restrictions on
+  temporary directory. Instead, continue with default window decorations. (issue
+  #436)
 
 ## 1.6.4
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatWindowsNativeWindowBorder.java

@@ -163,11 +163,18 @@ private void install( Window window ) {
 			return;
 
 		// install
-		WndProc wndProc = new WndProc( window );
-		if( wndProc.hwnd == 0 )
-			return;
+		try {
+			WndProc wndProc = new WndProc( window );
+			if( wndProc.hwnd == 0 )
+				return;
 
-		windowsMap.put( window, wndProc );
+			windowsMap.put( window, wndProc );
+		} catch( UnsatisfiedLinkError ex ) {
+			// catch for the case that the operating system prevents execution of DLL
+			// (e.g. if DLLs in temp folder are restricted)
+			// --> continue application without custom decorations
+			LoggingFacade.INSTANCE.logSevere( null, ex );
+		}
 	}
 
 	private void uninstall( Window window ) {