Qt: Implement advanced mapping I/O windows

Source/Core/DolphinQt2/Config/Mapping/MappingCommon.h

@@ -0,0 +1,27 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+class QString;
+class ControlReference;
+
+namespace ciface
+{
+namespace Core
+{
+class Device;
+class DeviceQualifier;
+}
+}
+
+namespace MappingCommon
+{
+QString GetExpressionForControl(const QString& control_name,
+                                const ciface::Core::DeviceQualifier& control_device,
+                                const ciface::Core::DeviceQualifier& default_device);
+QString DetectExpression(ControlReference* reference, ciface::Core::Device* device,
+                         const ciface::Core::DeviceQualifier& m_devq,
+                         const ciface::Core::DeviceQualifier& default_device);
+}