Native Libraries: moved code to JNIUtils.cpp and *MessageDialog.cpp

flatlaf-natives/flatlaf-natives-linux/src/main/cpp/JNIUtils.cpp

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2024 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// avoid inlining of printf()
+#define _NO_CRT_STDIO_INLINE
+
+#include "JNIUtils.h"
+
+/**
+ * @author Karl Tauber
+ */
+
+//---- class AutoReleaseStringUTF8 --------------------------------------------
+
+AutoReleaseStringUTF8::AutoReleaseStringUTF8( JNIEnv* _env, jstring _javaString ) {
+	env = _env;
+	javaString = _javaString;
+	chars = (javaString != NULL) ? env->GetStringUTFChars( javaString, NULL ) : NULL;
+}
+
+AutoReleaseStringUTF8::~AutoReleaseStringUTF8() {
+	if( chars != NULL )
+		env->ReleaseStringUTFChars( javaString, chars );
+}