undo: add device related undo commands

Add commands for deleting devices and editing device nicknames
to include the device-handling in the undo system.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

commands/command_device.h

@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0
+// Note: this header file is used by the undo-machinery and should not be included elsewhere.
+
+#ifndef COMMAND_DEVICE_H
+#define COMMAND_DEVICE_H
+
+#include "command_base.h"
+#include "core/device.h"
+
+struct device;
+
+// We put everything in a namespace, so that we can shorten names without polluting the global namespace
+namespace Command {
+
+class RemoveDevice final : public Base {
+public:
+	RemoveDevice(int index);
+private:
+	// for undo
+	device dev;
+
+	// for redo
+	int index;
+
+	void undo() override;
+	void redo() override;
+	bool workToBeDone() override;
+};
+
+class EditDeviceNickname final : public Base {
+public:
+	EditDeviceNickname(int index, const QString &nickname);
+private:
+	// for redo and undo
+	int index;
+	std::string nickname;
+
+	void undo() override;
+	void redo() override;
+	bool workToBeDone() override;
+};
+
+} // namespace Command
+#endif