--- /dev/null
+/*
+ * Copyright (C) 2016 Simon Fels <morphis@gravedo.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 3, as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranties of
+ * MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
+ * PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef ANBOX_WM_STACK_H_
+#define ANBOX_WM_STACK_H_
+
+#include <ostream>
+
+namespace anbox {
+namespace wm {
+class Stack {
+ public:
+ enum class Id {
+ Invalid = -1,
+ Default = 0,
+ Fullscreen = 1,
+ Freeform = 2,
+ };
+
+ Stack() = delete;
+ Stack(const Stack&) = delete;
+};
+
+std::ostream& operator<<(std::ostream &out, Stack::Id const &stack);
+std::istream& operator>>(std::istream &in, Stack::Id &stack);
+} // namespace wm
+} // namespace anbox
+
+
+
+#endif