bool is_gs_slot = this->selected_slot == OWNER_DEITY;

        bool invalid_slot = this->selected_slot == INVALID_COMPANY;

        bool is_green_slot = IsEditable((CompanyID)(this->selected_slot)) && Company::IsValidID(this->selected_slot) && Company::IsValidAiID(this->selected_slot) && !Company::Get(this->selected_slot)->ai_instance->IsDead();

        bool is_silver_slot_above = !IsEditable((CompanyID)(this->selected_slot - 1));

        bool is_silver_slot_below = !IsEditable((CompanyID)(this->selected_slot + 1));

        bool is_green_slot_above = IsEditable((CompanyID)(this->selected_slot - 1)) && Company::IsValidID(this->selected_slot - 1) && Company::IsValidAiID(this->selected_slot - 1) && !Company::Get(this->selected_slot - 1)->ai_instance->IsDead();

        bool is_green_slot_below = IsEditable((CompanyID)(this->selected_slot + 1)) && Company::IsValidID(this->selected_slot + 1) && Company::IsValidAiID(this->selected_slot + 1) && !Company::Get(this->selected_slot + 1)->ai_instance->IsDead();

 

        this->SetWidgetDisabledState(WID_AIC_MOVE_UP, is_gs_slot || invalid_slot || is_green_slot || is_silver_slot_above || is_green_slot_above);

        this->SetWidgetDisabledState(WID_AIC_MOVE_DOWN, is_gs_slot || invalid_slot || is_green_slot || is_silver_slot_below || is_green_slot_below);

 

 

Check first slot:                                                           Check second slot:

is_gs_slot  = false // GS slot isn't selected                               silver:

is_gs_slot  = true  // GS slot is selected, and thus, unmovable             IsEditable  = false // human player in this slot, or outside slot range of 1-15, and thus, unmovable

 

invalid_slot= false // nothing isn't selected                               orange:

invalid_slot= true  // nothing is selected, and thus, unmovable             IsEditable  = true  // slot could be orange, red or green

                                                                            IsValidID   = false // slot is orange, and thus, first and second slots are movable

orange:

IsEditable  = true  // slot could be orange, red or green                   green:

IsValidID   = false // slot is orange, and thus, check second slot          IsEditable  = true  // slot could be orange, red or green

                                                                            IsValidID   = true  // slot could be red or green

green:                                                                      IsValidAiID = true  // slot could be red or green

IsEditable  = true  // slot could be orange, red or green                   IsDead      = false // slot is green, and thus, unmovable

IsValidID   = true  // slot could be red or green

IsValidAiID = true  // slot could be red or green                           red:

IsDead      = false // slot is green, and thus, unmovable                   IsEditable  = true  // slot could be orange, red or green

                                                                            IsValidID   = true  // slot could be red or green

red:                                                                        IsValidAiID = true  // slot could be red or green

IsEditable  = true  // slot could be orange, red or green                   IsDead      = true  // slot is red, and thus, first and second slots are movable

IsValidID   = true  // slot could be red or green

IsValidAiID = true  // slot could be red or green

IsDead      = true  // slot is red, and thus, check second slot