Implement RemapButton feature

Many changes were made here, too many to list here.

src/logid/InputDevice.h

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2019-2020 PixlOne
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY 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 LOGID_INPUTDEVICE_H
+#define LOGID_INPUTDEVICE_H
+
+#include <memory>
+
+extern "C"
+{
+#include <libevdev/libevdev.h>
+#include <libevdev/libevdev-uinput.h>
+};
+
+namespace logid
+{
+    typedef uint keycode;
+
+    class InputDevice
+    {
+    public:
+        class InvalidEventCode : public std::exception
+        {
+        public:
+            explicit InvalidEventCode(std::string name);
+            const char* what() const noexcept override;
+        private:
+            std::string _what;
+        };
+        explicit InputDevice(const char *name);
+        ~InputDevice();
+
+        void moveAxis(uint axis, int movement);
+        void pressKey(uint code);
+        void releaseKey(uint code);
+
+        static uint toKeyCode(std::string name);
+        static uint toAxisCode(std::string name);
+    private:
+        void _sendEvent(uint type, uint code, int value);
+
+        static uint _toEventCode(uint type, const std::string& name);
+
+        libevdev* device;
+        libevdev_uinput* ui_device;
+    };
+
+    extern std::unique_ptr<InputDevice> virtual_input;
+}
+
+#endif //LOGID_INPUTDEVICE_H