gems: add gems/wrapped_nitpicker_session.h

The 'Wrapped_nitpicker_session' contains the boiler-plate code that is
needed when virtualizing the nitpicker session interface.

repos/gems/include/gems/wrapped_nitpicker_session.h

@@ -0,0 +1,111 @@
+/*
+ * \brief  Wrapper of a nitpicker session
+ * \author Norman Feske
+ * \date   2014-10-01
+ *
+ * This utility is intended to reduce repetitive boiler-plate code of
+ * components that intercept the nitpicker session interface. By default,
+ * all RPC function calls are forwarded to the wrapped session. So the
+ * implementations have to override only those functions that need
+ * customizations.
+ */
+
+/*
+ * Copyright (C) 2014 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU General Public License version 2.
+ */
+
+#ifndef _INCLUDE__GEMS__WRAPPED_NITPICKER_SESSION_H_
+#define _INCLUDE__GEMS__WRAPPED_NITPICKER_SESSION_H_
+
+/* Genode includes */
+#include <base/rpc_server.h>
+#include <nitpicker_session/nitpicker_session.h>
+
+class Wrapped_nitpicker_session : public Genode::Rpc_object<Nitpicker::Session>
+{
+	private:
+
+		Nitpicker::Session &_session;
+
+	public:
+
+		typedef Nitpicker::View_capability      View_capability;
+		typedef Nitpicker::Session::View_handle View_handle;
+
+		/**
+		 * Constructor
+		 *
+		 * \param session  interface of wrapped nitpicker session
+		 */
+		Wrapped_nitpicker_session(Nitpicker::Session &session) : _session(session) { }
+
+		Framebuffer::Session_capability framebuffer_session() override
+		{
+			return _session.framebuffer_session();
+		}
+
+		Input::Session_capability input_session() override
+		{
+			return _session.input_session();
+		}
+
+		View_handle create_view(View_handle parent) override
+		{
+			return _session.create_view(parent);
+		}
+
+		void destroy_view(View_handle view) override
+		{
+			_session.destroy_view(view);
+		}
+
+		View_handle view_handle(View_capability view_cap, View_handle handle) override
+		{
+			return _session.view_handle(view_cap, handle);
+		}
+
+		View_capability view_capability(View_handle view) override
+		{
+			return _session.view_capability(view);
+		}
+
+		void release_view_handle(View_handle view) override
+		{
+			_session.release_view_handle(view);
+		}
+
+		Genode::Dataspace_capability command_dataspace() override
+		{
+			return _session.command_dataspace();
+		}
+
+		void execute() override
+		{
+			_session.execute();
+		}
+
+		Framebuffer::Mode mode() override
+		{
+			return _session.mode();
+		}
+
+		void mode_sigh(Genode::Signal_context_capability sigh) override
+		{
+			_session.mode_sigh(sigh);
+		}
+
+		void buffer(Framebuffer::Mode mode, bool use_alpha) override
+		{
+			_session.buffer(mode, use_alpha);
+		}
+
+		void focus(Genode::Capability<Nitpicker::Session> session)
+		{
+			_session.focus(session);
+		}
+};
+
+#endif /* _INCLUDE__GEMS__WRAPPED_NITPICKER_SESSION_H_ */