undo: implement renaming of events

There is a slight complexity here owing to the fact that the profile
works on a copy of the current dive: We get a copy of the event and
have to search for the original event in the current dive. This
could be done in the undo command. Nevertheless, here we do it in
the profile so that when in the future the profile can work on a
non-copied dive we can simply remove this function.

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

commands/command.cpp

@@ -344,4 +344,9 @@ void addEventSetpointChange(struct dive *d, int dcNr, int seconds, pressure_t pO
 	execute(new AddEventSetpointChange(d, dcNr, seconds, pO2));
 }
 
+void renameEvent(struct dive *d, int dcNr, struct event *ev, const char *name)
+{
+	execute(new RenameEvent(d, dcNr, ev, name));
+}
+
 } // namespace Command

commands/command.h

@@ -109,6 +109,7 @@ void editTripNotes(dive_trip *trip, const QString &s);
 void addEventBookmark(struct dive *d, int dcNr, int seconds);
 void addEventDivemodeSwitch(struct dive *d, int dcNr, int seconds, int divemode);
 void addEventSetpointChange(struct dive *d, int dcNr, int seconds, pressure_t pO2);
+void renameEvent(struct dive *d, int dcNr, struct event *ev, const char *name);
 
 } // namespace Command
 

commands/command_event.cpp

@@ -70,4 +70,31 @@ AddEventSetpointChange::AddEventSetpointChange(struct dive *d, int dcNr, int sec
 	setText(tr("Add set point change")); // TODO: format pO2 value in bar or psi.
 }
 
+RenameEvent::RenameEvent(struct dive *d, int dcNr, struct event *ev, const char *name) : EventBase(d, dcNr),
+	eventToAdd(clone_event_rename(ev, name)),
+	eventToRemove(ev)
+{
+	setText(tr("Rename bookmark to %1").arg(name));
+}
+
+bool RenameEvent::workToBeDone()
+{
+	return true;
+}
+
+void RenameEvent::redoit()
+{
+	struct divecomputer *dc = get_dive_dc(d, dcNr);
+	swap_event(dc, eventToRemove, eventToAdd.get());
+	event *tmp = eventToRemove;
+	eventToRemove = eventToAdd.release();
+	eventToAdd.reset(tmp);
+}
+
+void RenameEvent::undoit()
+{
+	// Undo and redo do the same thing - they simply swap events
+	redoit();
+}
+
 } // namespace Command

commands/command_event.h

@@ -58,6 +58,18 @@ public:
 	AddEventSetpointChange(struct dive *d, int dcNr, int seconds, pressure_t pO2);
 };
 
+class RenameEvent : public EventBase {
+public:
+	RenameEvent(struct dive *d, int dcNr, struct event *ev, const char *name);
+private:
+	bool workToBeDone() override;
+	void undoit() override;
+	void redoit() override;
+
+	OwningEventPtr eventToAdd;	// for undo and redo
+	event *eventToRemove;		// for undo and redo
+};
+
 } // namespace Command
 
 #endif // COMMAND_EVENT_H