Function GetCargoSubtypeText

src/vehicle_gui.cpp:1387–1402

Get the cargo subtype text from NewGRF for the vehicle details window. */

/** Get the cargo subtype text from NewGRF for the vehicle details window. */
StringID GetCargoSubtypeText(const Vehicle *v)
{
	if (!EngInfo(v->engine_type)->callback_mask.Test(VehicleCallbackMask::CargoSuffix)) return STR_EMPTY;
	std::array<int32_t, 1> regs100;
	uint16_t cb = GetVehicleCallback(CBID_VEHICLE_CARGO_SUFFIX, 0, 0, v->engine_type, v, regs100);
	if (v->GetGRF()->grf_version < 8 && cb == 0xFF) return STR_EMPTY;
	if (cb == CALLBACK_FAILED || cb == 0x400) return STR_EMPTY;
	if (cb == 0x40F) {
		return GetGRFStringID(v->GetGRFID(), static_cast<GRFStringID>(regs100[0]));
	}
	if (cb > 0x400) {
		ErrorUnknownCallbackResult(v->GetGRFID(), CBID_VEHICLE_CARGO_SUFFIX, cb);
		return STR_EMPTY;
	}
	return GetGRFStringID(v->GetGRFID(), GRFSTR_MISC_GRF_TEXT + cb);
}

/** Sort vehicle groups by the number of vehicles in the group */
static bool VehicleGroupLengthSorter(const GUIVehicleGroup &a, const GUIVehicleGroup &b)