Store different default rules for special country and region

[calcitem]

Getting special country and region values ​​is essentially to configure different default settings for different countries, mainly rule settings.

My idea is to establish a mapping relationship between special countries and regions and default values ​​and store them in the map. I don’t know if it’s better to save to local data storage?

[Leptopoda]

You could extend the normal Settings object with SpecialSettings and then use the new calss as a default.

I think inheritance is the way to go with that.

[calcitem]

After your refactoring, it is more convenient to realize this function!