tron@2186: /* $Id$ */
tron@2186: 
truelight@0: #include "stdafx.h"
Darkvater@1891: #include "openttd.h"
tron@3959: #include "roadveh.h"
tron@3961: #include "ship.h"
truelight@0: #include "news.h"
rubidium@8750: #include "player_func.h"
truelight@0: #include "engine.h"
celestar@1601: #include "debug.h"
matthijs@1752: #include "vehicle_gui.h"
matthijs@1758: #include "depot.h"
bjarni@2676: #include "train.h"
bjarni@4662: #include "aircraft.h"
peter1138@6439: #include "cargotype.h"
rubidium@7139: #include "group.h"
smatz@8560: #include "order.h"
rubidium@8610: #include "strings_func.h"
rubidium@8612: #include "command_func.h"
rubidium@8640: #include "vehicle_func.h"
rubidium@8627: #include "functions.h"
rubidium@8707: #include "variables.h"
rubidium@8708: #include "autoreplace_func.h"
bjarni@8859: #include "articulated_vehicles.h"
bjarni@2244: 
rubidium@8760: #include "table/strings.h"
rubidium@8760: 
bjarni@9124: 
bjarni@2599: /*
bjarni@2599:  * move the cargo from one engine to another if possible
bjarni@2599:  */
bjarni@2599: static void MoveVehicleCargo(Vehicle *dest, Vehicle *source)
bjarni@2599: {
bjarni@2599: 	Vehicle *v = dest;
bjarni@2599: 
bjarni@2599: 	do {
bjarni@2599: 		do {
bjarni@2599: 			if (source->cargo_type != dest->cargo_type)
rubidium@4434: 				continue; // cargo not compatible
bjarni@2599: 
rubidium@7506: 			if (dest->cargo.Count() == dest->cargo_cap)
rubidium@4434: 				continue; // the destination vehicle is already full
bjarni@2599: 
rubidium@7506: 			uint units_moved = min(source->cargo.Count(), dest->cargo_cap - dest->cargo.Count());
rubidium@7506: 			source->cargo.MoveTo(&dest->cargo, units_moved);
bjarni@2599: 
bjarni@2599: 			// copy the age of the cargo
bjarni@2599: 			dest->day_counter  = source->day_counter;
bjarni@2599: 			dest->tick_counter = source->tick_counter;
bjarni@2599: 
rubidium@7988: 		} while (source->cargo.Count() > 0 && (dest = dest->Next()) != NULL);
bjarni@2599: 		dest = v;
rubidium@7988: 	} while ((source = source->Next()) != NULL);
rubidium@5944: 
rubidium@5944: 	/*
rubidium@5944: 	 * The of the train will be incorrect at this moment. This is due
rubidium@5944: 	 * to the fact that removing the old wagon updates the weight of
rubidium@5944: 	 * the complete train, which is without the weight of cargo we just
rubidium@5944: 	 * moved back into some (of the) new wagon(s).
rubidium@5944: 	 */
rubidium@7993: 	if (dest->type == VEH_TRAIN) TrainConsistChanged(dest->First());
bjarni@2599: }
bjarni@2599: 
bjarni@4741: static bool VerifyAutoreplaceRefitForOrders(const Vehicle *v, const EngineID engine_type)
bjarni@4741: {
bjarni@4741: 	const Order *o;
bjarni@4741: 	const Vehicle *u;
bjarni@4741: 
rubidium@6585: 	if (v->type == VEH_TRAIN) {
rubidium@7993: 		u = v->First();
bjarni@4741: 	} else {
bjarni@4741: 		u = v;
bjarni@4741: 	}
bjarni@4741: 
bjarni@4741: 	FOR_VEHICLE_ORDERS(u, o) {
bjarni@4782: 		if (!(o->refit_cargo < NUM_CARGO)) continue;
bjarni@4741: 		if (!CanRefitTo(v->engine_type, o->refit_cargo)) continue;
bjarni@4741: 		if (!CanRefitTo(engine_type, o->refit_cargo)) return false;
bjarni@4741: 	}
bjarni@4741: 
bjarni@4741: 	return true;
bjarni@4741: }
bjarni@4741: 
bjarni@4554: /**
bjarni@4554:  * Function to find what type of cargo to refit to when autoreplacing
bjarni@4554:  * @param *v Original vehicle, that is being replaced
bjarni@4554:  * @param engine_type The EngineID of the vehicle that is being replaced to
bjarni@4554:  * @return The cargo type to replace to
bjarni@4554:  *    CT_NO_REFIT is returned if no refit is needed
bjarni@4554:  *    CT_INVALID is returned when both old and new vehicle got cargo capacity and refitting the new one to the old one's cargo type isn't possible
bjarni@4554:  */
bjarni@4554: static CargoID GetNewCargoTypeForReplace(Vehicle *v, EngineID engine_type)
bjarni@4554: {
bjarni@7001: 	CargoID new_cargo_type = GetEngineCargoType(engine_type);
bjarni@4554: 
bjarni@7001: 	if (new_cargo_type == CT_INVALID) return CT_NO_REFIT; // Don't try to refit an engine with no cargo capacity
bjarni@4554: 
bjarni@8858: 	if (v->cargo_cap != 0 && (v->cargo_type == new_cargo_type || CanRefitTo(engine_type, v->cargo_type))) {
bjarni@4741: 		if (VerifyAutoreplaceRefitForOrders(v, engine_type)) {
rubidium@5838: 			return v->cargo_type == new_cargo_type ? (CargoID)CT_NO_REFIT : v->cargo_type;
bjarni@4741: 		} else {
bjarni@4741: 			return CT_INVALID;
bjarni@4741: 		}
bjarni@4741: 	}
rubidium@6585: 	if (v->type != VEH_TRAIN) return CT_INVALID; // We can't refit the vehicle to carry the cargo we want
bjarni@4554: 
bjarni@4554: 	/* Below this line it's safe to assume that the vehicle in question is a train */
bjarni@4554: 
bjarni@4554: 	if (v->cargo_cap != 0) return CT_INVALID; // trying to replace a vehicle with cargo capacity into another one with incompatible cargo type
bjarni@4554: 
bjarni@4554: 	/* the old engine didn't have cargo capacity, but the new one does
bjarni@4554: 	 * now we will figure out what cargo the train is carrying and refit to fit this */
rubidium@7993: 	v = v->First();
bjarni@4554: 	do {
bjarni@4554: 		if (v->cargo_cap == 0) continue;
bjarni@4554: 		/* Now we found a cargo type being carried on the train and we will see if it is possible to carry to this one */
bjarni@4554: 		if (v->cargo_type == new_cargo_type) return CT_NO_REFIT;
bjarni@4554: 		if (CanRefitTo(engine_type, v->cargo_type)) return v->cargo_type;
rubidium@7988: 	} while ((v = v->Next()) != NULL);
bjarni@4554: 	return CT_NO_REFIT; // We failed to find a cargo type on the old vehicle and we will not refit the new one
bjarni@4554: }
bjarni@4554: 
bjarni@2552: /* Replaces a vehicle (used to be called autorenew)
tron@2639:  * This function is only called from MaybeReplaceVehicle()
bjarni@2552:  * Must be called with _current_player set to the owner of the vehicle
bjarni@2552:  * @param w Vehicle to replace
bjarni@2552:  * @param flags is the flags to use when calling DoCommand(). Mainly DC_EXEC counts
tron@2639:  * @return value is cost of the replacement or CMD_ERROR
bjarni@2552:  */
rubidium@7486: static CommandCost ReplaceVehicle(Vehicle **w, byte flags, Money total_cost)
bjarni@2552: {
rubidium@7439: 	CommandCost cost;
rubidium@7439: 	CommandCost sell_value;
bjarni@2599: 	Vehicle *old_v = *w;
bjarni@2552: 	const Player *p = GetPlayer(old_v->owner);
bjarni@2552: 	EngineID new_engine_type;
bjarni@2552: 	const UnitID cached_unitnumber = old_v->unitnumber;
bjarni@2552: 	bool new_front = false;
bjarni@2552: 	Vehicle *new_v = NULL;
peter1138@8754: 	char *vehicle_name = NULL;
bjarni@4554: 	CargoID replacement_cargo_type;
bjarni@2552: 
frosch@9176: 	/* Check if there is a autoreplacement set for the vehicle */
frosch@9176: 	new_engine_type = EngineReplacementForPlayer(p, old_v->engine_type, old_v->group_id);
frosch@9176: 	/* if not, just renew to the same type */
rubidium@7146: 	if (new_engine_type == INVALID_ENGINE) new_engine_type = old_v->engine_type;
rubidium@7146: 
bjarni@4554: 	replacement_cargo_type = GetNewCargoTypeForReplace(old_v, new_engine_type);
bjarni@4554: 
bjarni@4554: 	/* check if we can't refit to the needed type, so no replace takes place to prevent the vehicle from altering cargo type */
rubidium@7446: 	if (replacement_cargo_type == CT_INVALID) return CommandCost();
bjarni@4554: 
bjarni@6043: 	sell_value = DoCommand(0, old_v->index, 0, DC_QUERY_COST, GetCmdSellVeh(old_v));
bjarni@4728: 
bjarni@4728: 	/* We give the player a loan of the same amount as the sell value.
bjarni@4728: 	 * This is needed in case he needs the income from the sale to build the new vehicle.
bjarni@4728: 	 * We take it back if building fails or when we really sell the old engine */
bjarni@4728: 	SubtractMoneyFromPlayer(sell_value);
bjarni@4728: 
bjarni@6043: 	cost = DoCommand(old_v->tile, new_engine_type, 3, flags, GetCmdBuildVeh(old_v));
bjarni@4728: 	if (CmdFailed(cost)) {
rubidium@7446: 		/* Take back the money we just gave the player */
rubidium@7446: 		sell_value.MultiplyCost(-1);
rubidium@7446: 		SubtractMoneyFromPlayer(sell_value);
bjarni@4728: 		return cost;
bjarni@4728: 	}
bjarni@2552: 
bjarni@7242: 	if (replacement_cargo_type != CT_NO_REFIT) {
bjarni@7242: 		/* add refit cost */
rubidium@7439: 		CommandCost refit_cost = GetRefitCost(new_engine_type);
bjarni@8859: 		if (old_v->type == VEH_TRAIN && RailVehInfo(new_engine_type)->railveh_type == RAILVEH_MULTIHEAD) {
bjarni@8859: 			/* Since it's a dualheaded engine we have to pay once more because the rear end is being refitted too. */
bjarni@8859: 			refit_cost.AddCost(refit_cost);
bjarni@8859: 		}
rubidium@7446: 		cost.AddCost(refit_cost);
bjarni@7242: 	}
bjarni@4554: 
bjarni@2552: 	if (flags & DC_EXEC) {
bjarni@2564: 		new_v = GetVehicle(_new_vehicle_id);
rubidium@4434: 		*w = new_v; //we changed the vehicle, so MaybeReplaceVehicle needs to work on the new one. Now we tell it what the new one is
bjarni@2552: 
bjarni@2552: 		/* refit if needed */
bjarni@4554: 		if (replacement_cargo_type != CT_NO_REFIT) {
bjarni@6043: 			if (CmdFailed(DoCommand(0, new_v->index, replacement_cargo_type, DC_EXEC, GetCmdRefitVeh(new_v)))) {
bjarni@4613: 				/* Being here shows a failure, which most likely is in GetNewCargoTypeForReplace() or incorrect estimation costs */
bjarni@4613: 				error("Autoreplace failed to refit. Replace engine %d to %d and refit to cargo %d", old_v->engine_type, new_v->engine_type, replacement_cargo_type);
bjarni@4611: 			}
bjarni@2552: 		}
bjarni@4611: 
skidd13@8424: 		if (new_v->type == VEH_TRAIN && HasBit(old_v->u.rail.flags, VRF_REVERSE_DIRECTION) && !IsMultiheaded(new_v) && !(new_v->Next() != NULL && IsArticulatedPart(new_v->Next()))) {
bjarni@3896: 			// we are autorenewing to a single engine, so we will turn it as the old one was turned as well
skidd13@8427: 			SetBit(new_v->u.rail.flags, VRF_REVERSE_DIRECTION);
bjarni@3896: 		}
bjarni@2552: 
rubidium@6585: 		if (old_v->type == VEH_TRAIN && !IsFrontEngine(old_v)) {
bjarni@2552: 			/* this is a railcar. We need to move the car into the train
bjarni@2552: 			 * We add the new engine after the old one instead of replacing it. It will give the same result anyway when we
bjarni@2552: 			 * sell the old engine in a moment
bjarni@2552: 			 */
bjarni@7231: 			/* Get the vehicle in front of the one we move out */
rubidium@7993: 			Vehicle *front = old_v->Previous();
bjarni@7231: 			/* If the vehicle in front is the rear end of a dualheaded engine, then we need to use the one in front of that one */
bjarni@8022: 			if (IsRearDualheaded(front)) front = front->Previous();
bjarni@2678: 			/* Now we move the old one out of the train */
tron@3491: 			DoCommand(0, (INVALID_VEHICLE << 16) | old_v->index, 0, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);
bjarni@7202: 			/* Add the new vehicle */
bjarni@7202: 			DoCommand(0, (front->index << 16) | new_v->index, 1, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);
bjarni@2552: 		} else {
bjarni@2552: 			// copy/clone the orders
belugas@8965: 			DoCommand(0, (old_v->index << 16) | new_v->index, old_v->IsOrderListShared() ? CO_SHARE : CO_COPY, DC_EXEC, CMD_CLONE_ORDER);
bjarni@2552: 			new_v->cur_order_index = old_v->cur_order_index;
bjarni@2552: 			ChangeVehicleViewWindow(old_v, new_v);
bjarni@2575: 			new_v->profit_this_year = old_v->profit_this_year;
bjarni@2575: 			new_v->profit_last_year = old_v->profit_last_year;
bjarni@3679: 			new_v->service_interval = old_v->service_interval;
rubidium@7143: 			DoCommand(0, old_v->group_id, new_v->index, flags, CMD_ADD_VEHICLE_GROUP);
bjarni@2552: 			new_front = true;
rubidium@4434: 			new_v->unitnumber = old_v->unitnumber; // use the same unit number
bjarni@7047: 			new_v->dest_tile  = old_v->dest_tile;
bjarni@2552: 
bjarni@2552: 			new_v->current_order = old_v->current_order;
rubidium@6585: 			if (old_v->type == VEH_TRAIN && GetNextVehicle(old_v) != NULL){
bjarni@2842: 				Vehicle *temp_v = GetNextVehicle(old_v);
bjarni@2842: 
bjarni@2842: 				// move the entire train to the new engine, excluding the old engine
bjarni@2842: 				if (IsMultiheaded(old_v) && temp_v == old_v->u.rail.other_multiheaded_part) {
bjarni@2842: 					// we got front and rear of a multiheaded engine right after each other. We should work with the next in line instead
bjarni@2842: 					temp_v = GetNextVehicle(temp_v);
bjarni@2842: 				}
bjarni@2842: 
bjarni@2842: 				if (temp_v != NULL) {
tron@3491: 					DoCommand(0, (new_v->index << 16) | temp_v->index, 1, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);
bjarni@2681: 				}
bjarni@2552: 			}
bjarni@2552: 		}
bjarni@2678: 		/* We are done setting up the new vehicle. Now we move the cargo from the old one to the new one */
rubidium@7993: 		MoveVehicleCargo(new_v->type == VEH_TRAIN ? new_v->First() : new_v, old_v);
peter1138@2716: 
peter1138@2716: 		// Get the name of the old vehicle if it has a custom name.
peter1138@8754: 		if (old_v->name != NULL) vehicle_name = strdup(old_v->name);
bjarni@4554: 	} else { // flags & DC_EXEC not set
rubidium@7446: 		CommandCost tmp_move;
bjarni@8020: 
bjarni@8020: 		if (old_v->type == VEH_TRAIN && IsFrontEngine(old_v)) {
bjarni@8023: 			Vehicle *next_veh = GetNextUnit(old_v); // don't try to move the rear multiheaded engine or articulated parts
bjarni@8020: 			if (next_veh != NULL) {
bjarni@8020: 				/* Verify that the wagons can be placed on the engine in question.
bjarni@8020: 				 * This is done by building an engine, test if the wagons can be added and then sell the test engine. */
bjarni@8020: 				DoCommand(old_v->tile, new_engine_type, 3, DC_EXEC, GetCmdBuildVeh(old_v));
bjarni@8020: 				Vehicle *temp = GetVehicle(_new_vehicle_id);
bjarni@8020: 				tmp_move = DoCommand(0, (temp->index << 16) | next_veh->index, 1, 0, CMD_MOVE_RAIL_VEHICLE);
bjarni@8020: 				DoCommand(0, temp->index, 0, DC_EXEC, GetCmdSellVeh(old_v));
bjarni@8020: 			}
bjarni@7296: 		}
bjarni@7296: 
bjarni@4554: 		/* Ensure that the player will not end up having negative money while autoreplacing
bjarni@4554: 		 * This is needed because the only other check is done after the income from selling the old vehicle is substracted from the cost */
rubidium@7448: 		if (CmdFailed(tmp_move) || p->player_money < (cost.GetCost() + total_cost)) {
rubidium@7446: 			/* Pay back the loan */
rubidium@7446: 			sell_value.MultiplyCost(-1);
rubidium@7446: 			SubtractMoneyFromPlayer(sell_value);
bjarni@4728: 			return CMD_ERROR;
bjarni@4728: 		}
bjarni@2552: 	}
bjarni@2552: 
bjarni@4728: 	/* Take back the money we just gave the player just before building the vehicle
bjarni@4728: 	 * The player will get the same amount now that the sale actually takes place */
rubidium@7446: 	sell_value.MultiplyCost(-1);
rubidium@7446: 	SubtractMoneyFromPlayer(sell_value);
bjarni@4728: 
bjarni@4554: 	/* sell the engine/ find out how much you get for the old engine (income is returned as negative cost) */
rubidium@7446: 	cost.AddCost(DoCommand(0, old_v->index, 0, flags, GetCmdSellVeh(old_v)));
bjarni@2552: 
bjarni@2552: 	if (new_front) {
bjarni@4554: 		/* now we assign the old unitnumber to the new vehicle */
bjarni@2552: 		new_v->unitnumber = cached_unitnumber;
bjarni@2552: 	}
bjarni@2552: 
bjarni@4554: 	/* Transfer the name of the old vehicle */
peter1138@8754: 	if ((flags & DC_EXEC) && vehicle_name != NULL) {
peter1138@2716: 		_cmd_text = vehicle_name;
tron@3491: 		DoCommand(0, new_v->index, 0, DC_EXEC, CMD_NAME_VEHICLE);
peter1138@8754: 		free(vehicle_name);
peter1138@2716: 	}
peter1138@2716: 
bjarni@2552: 	return cost;
bjarni@2552: }
bjarni@2552: 
tron@2639: /** replaces a vehicle if it's set for autoreplace or is too old
tron@2639:  * (used to be called autorenew)
tron@2639:  * @param v The vehicle to replace
rubidium@4434:  * if the vehicle is a train, v needs to be the front engine
bjarni@4662:  * @param check Checks if the replace is valid. No action is done at all
bjarni@4662:  * @param display_costs If set, a cost animation is shown (only if check is false)
bjarni@4662:  * @return CMD_ERROR if something went wrong. Otherwise the price of the replace
tron@2639:  */
rubidium@7439: CommandCost MaybeReplaceVehicle(Vehicle *v, bool check, bool display_costs)
bjarni@2552: {
bjarni@2552: 	Vehicle *w;
bjarni@2552: 	const Player *p = GetPlayer(v->owner);
bjarni@2552: 	byte flags = 0;
rubidium@7446: 	CommandCost cost, temp_cost;
bjarni@5937: 	bool stopped;
tron@2805: 
tron@2805: 	/* Remember the length in case we need to trim train later on
bjarni@3175: 	 * If it's not a train, the value is unused
bjarni@3175: 	 * round up to the length of the tiles used for the train instead of the train length instead
bjarni@3175: 	 * Useful when newGRF uses custom length */
rubidium@6585: 	uint16 old_total_length = (v->type == VEH_TRAIN ?
celestar@3422: 		(v->u.rail.cached_total_length + TILE_SIZE - 1) / TILE_SIZE * TILE_SIZE :
celestar@3422: 		-1
celestar@3422: 	);
bjarni@3175: 
bjarni@2552: 
bjarni@2552: 	_current_player = v->owner;
bjarni@2552: 
bjarni@6045: 	assert(IsPlayerBuildableVehicleType(v));
bjarni@2579: 
rubidium@4434: 	assert(v->vehstatus & VS_STOPPED); // the vehicle should have been stopped in VehicleEnteredDepotThisTick() if needed
bjarni@2590: 
bjarni@5937: 	/* Remember the flag v->leave_depot_instantly because if we replace the vehicle, the vehicle holding this flag will be sold
bjarni@5937: 	 * If it is set, then we only stopped the vehicle to replace it (if needed) and we will need to start it again.
bjarni@5937: 	 * We also need to reset the flag since it should remain false except from when the vehicle enters a depot until autoreplace is handled in the same tick */
bjarni@5937: 	stopped = v->leave_depot_instantly;
bjarni@5937: 	v->leave_depot_instantly = false;
bjarni@2552: 
tron@2639: 	for (;;) {
rubidium@8726: 		cost = CommandCost(EXPENSES_NEW_VEHICLES);
bjarni@2552: 		w = v;
bjarni@2552: 		do {
bjarni@8022: 			if (w->type == VEH_TRAIN && IsRearDualheaded(w)) {
bjarni@2676: 				/* we build the rear ends of multiheaded trains with the front ones */
bjarni@2676: 				continue;
bjarni@2676: 			}
bjarni@2676: 
bjarni@2552: 			// check if the vehicle should be replaced
bjarni@9124: 			if (!w->NeedsAutorenewing(p) || // replace if engine is too old
tron@2639: 					w->max_age == 0) { // rail cars got a max age of 0
frosch@9176: 				if (!EngineHasReplacementForPlayer(p, w->engine_type, w->group_id)) continue;
bjarni@2552: 			}
bjarni@2552: 
bjarni@2552: 			/* Now replace the vehicle */
rubidium@7446: 			temp_cost = ReplaceVehicle(&w, flags, cost.GetCost());
bjarni@2552: 
bjarni@7296: 			if (CmdFailed(temp_cost)) break; // replace failed for some reason. Leave the vehicle alone
bjarni@7296: 
tron@2639: 			if (flags & DC_EXEC &&
rubidium@6585: 					(w->type != VEH_TRAIN || w->u.rail.first_engine == INVALID_ENGINE)) {
tron@2639: 				/* now we bought a new engine and sold the old one. We need to fix the
tron@2639: 				 * pointers in order to avoid pointing to the old one for trains: these
tron@2639: 				 * pointers should point to the front engine and not the cars
tron@2639: 				 */
bjarni@2552: 				v = w;
bjarni@2552: 			}
rubidium@7446: 			cost.AddCost(temp_cost);
rubidium@6585: 		} while (w->type == VEH_TRAIN && (w = GetNextVehicle(w)) != NULL);
bjarni@2552: 
rubidium@7448: 		if (!(flags & DC_EXEC) && (p->player_money < (cost.GetCost() + p->engine_renew_money) || cost.GetCost() == 0)) {
rubidium@7448: 			if (!check && p->player_money < (cost.GetCost() + p->engine_renew_money) && ( _local_player == v->owner ) && cost.GetCost() != 0) {
bjarni@2552: 				StringID message;
bjarni@2552: 				SetDParam(0, v->unitnumber);
bjarni@2552: 				switch (v->type) {
rubidium@6585: 					case VEH_TRAIN:    message = STR_TRAIN_AUTORENEW_FAILED;       break;
rubidium@6585: 					case VEH_ROAD:     message = STR_ROADVEHICLE_AUTORENEW_FAILED; break;
rubidium@6585: 					case VEH_SHIP:     message = STR_SHIP_AUTORENEW_FAILED;        break;
rubidium@6585: 					case VEH_AIRCRAFT: message = STR_AIRCRAFT_AUTORENEW_FAILED;    break;
bjarni@2552: 						// This should never happen
bjarni@2552: 					default: NOT_REACHED(); message = 0; break;
bjarni@2552: 				}
bjarni@2552: 
bjarni@2552: 				AddNewsItem(message, NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0), v->index, 0);
bjarni@2552: 			}
tron@2639: 			if (stopped) v->vehstatus &= ~VS_STOPPED;
bjarni@4676: 			if (display_costs) _current_player = OWNER_NONE;
bjarni@4662: 			return CMD_ERROR;
bjarni@2552: 		}
bjarni@2552: 
bjarni@2552: 		if (flags & DC_EXEC) {
rubidium@4434: 			break; // we are done replacing since the loop ran once with DC_EXEC
bjarni@4662: 		} else if (check) {
bjarni@4662: 			/* It's a test only and we know that we can do this
bjarni@4662: 			 * NOTE: payment for wagon removal is NOT included in this price */
bjarni@4662: 			return cost;
bjarni@2552: 		}
bjarni@2552: 		// now we redo the loop, but this time we actually do stuff since we know that we can do it
bjarni@2552: 		flags |= DC_EXEC;
bjarni@2552: 	}
bjarni@2552: 
tron@2805: 	/* If setting is on to try not to exceed the old length of the train with the replacement */
rubidium@6585: 	if (v->type == VEH_TRAIN && p->renew_keep_length) {
bjarni@2617: 		Vehicle *temp;
bjarni@2617: 		w = v;
tron@2805: 
tron@2805: 		while (v->u.rail.cached_total_length > old_total_length) {
bjarni@2617: 			// the train is too long. We will remove cars one by one from the start of the train until it's short enough
belugas@6119: 			while (w != NULL && RailVehInfo(w->engine_type)->railveh_type != RAILVEH_WAGON) {
bjarni@2617: 				w = GetNextVehicle(w);
bjarni@2617: 			}
bjarni@2617: 			if (w == NULL) {
bjarni@2617: 				// we failed to make the train short enough
bjarni@2617: 				SetDParam(0, v->unitnumber);
bjarni@2617: 				AddNewsItem(STR_TRAIN_TOO_LONG_AFTER_REPLACEMENT, NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0), v->index, 0);
bjarni@2617: 				break;
bjarni@2617: 			}
bjarni@2617: 			temp = w;
bjarni@2617: 			w = GetNextVehicle(w);
tron@3491: 			DoCommand(0, (INVALID_VEHICLE << 16) | temp->index, 0, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);
bjarni@2678: 			MoveVehicleCargo(v, temp);
rubidium@7446: 			cost.AddCost(DoCommand(0, temp->index, 0, DC_EXEC, CMD_SELL_RAIL_WAGON));
bjarni@2617: 		}
bjarni@2617: 	}
bjarni@2617: 
tron@2639: 	if (stopped) v->vehstatus &= ~VS_STOPPED;
bjarni@4662: 	if (display_costs) {
rubidium@7446: 		if (IsLocalPlayer()) ShowCostOrIncomeAnimation(v->x_pos, v->y_pos, v->z_pos, cost.GetCost());
bjarni@4662: 		_current_player = OWNER_NONE;
bjarni@4662: 	}
bjarni@4662: 	return cost;
bjarni@2552: }