Method BuildCargoList

src/station_gui.cpp:1606–1646

* Build up the cargo view for WAITING mode and a specific cargo. * @param cargo Cargo to show. * @param packets The current station's cargo list for that cargo. * @param entry The CargoDataEntry to save the result in. */

	 * @param entry The CargoDataEntry to save the result in.
	 */
	void BuildCargoList(CargoType cargo, const StationCargoList &packets, CargoDataEntry *entry)
	{
		const CargoDataEntry *source_dest = this->cached_destinations.Retrieve(cargo);
		for (StationCargoList::ConstIterator it = packets.Packets()->begin(); it != packets.Packets()->end(); it++) {
			const CargoPacket *cp = *it;
			StationID next = it.GetKey();

			const CargoDataEntry *source_entry = source_dest->Retrieve(cp->GetFirstStation());
			if (source_entry == nullptr) {
				this->ShowCargo(entry, cargo, cp->GetFirstStation(), next, StationID::Invalid(), cp->Count());
				continue;
			}

			const CargoDataEntry *via_entry = source_entry->Retrieve(next);
			if (via_entry == nullptr) {
				this->ShowCargo(entry, cargo, cp->GetFirstStation(), next, StationID::Invalid(), cp->Count());
				continue;
			}

			uint remaining = cp->Count();
			for (CargoDataSet::iterator dest_it = via_entry->Begin(); dest_it != via_entry->End();) {
				CargoDataEntry &dest_entry = **dest_it;

				/* Advance iterator here instead of in the for statement to test whether this is the last entry */
				++dest_it;

				uint val;
				if (dest_it == via_entry->End()) {
					/* Allocate all remaining waiting cargo to the last destination to avoid
					 * waiting cargo being "lost", and the displayed total waiting cargo
					 * not matching GoodsEntry::TotalCount() */
					val = remaining;
				} else {
					val = std::min<uint>(remaining, DivideApprox(cp->Count() * dest_entry.GetCount(), via_entry->GetCount()));
					remaining -= val;
				}
				this->ShowCargo(entry, cargo, cp->GetFirstStation(), next, dest_entry.GetStation(), val);
			}
		}
		this->ShowCargo(entry, cargo, NEW_STATION, NEW_STATION, NEW_STATION, packets.ReservedCount());
	}

	/**
	 * Build up the cargo view for all cargoes.