Added NagUtils, nag people about trying to override JVM memory options

logic/NagUtils.cpp

@@ -0,0 +1,37 @@
+/* Copyright 2013 MultiMC Contributors
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
+#include "NagUtils.h"
+#include "gui/CustomMessageBox.h"
+
+namespace NagUtils
+{
+void checkJVMArgs(QString jvmargs, QWidget *parent)
+{
+	if(jvmargs.contains("-XX:PermSize=") || jvmargs.contains(QRegExp("-Xm[sx]")))
+	{
+		CustomMessageBox::selectable(parent, parent->tr("JVM arguments warning"),
+									 parent->tr("You tried to manually set a JVM memory option (using "
+										" \"-XX:PermSize\", \"-Xmx\" or \"-Xms\") - there"
+										" are dedicated boxes for these in the settings (Java"
+										" tab, in the Memory group at the top).\n"
+										"Your manual settings will be overridden by the"
+										" dedicated options.\n"
+										"This message will be displayed until you remove them"
+										" from the JVM arguments."),
+									 QMessageBox::Warning)->exec();
+	}
+}
+}

logic/NagUtils.h

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+/* Copyright 2013 MultiMC Contributors
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
+#pragma once
+
+#include <QWidget>
+
+namespace NagUtils
+{
+void checkJVMArgs(QString args, QWidget *parent);
+}