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/* $Id$ */

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#include "stdafx.h"

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#include "openttd.h"

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#include "command.h"

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#include "functions.h"

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#include "gfx.h"

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#include "map.h"

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#include "order.h"

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#include "rail_map.h"

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#include "bridge_map.h"

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#include "saveload.h"

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#include "station.h"

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#include "tile.h"

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#include "town.h"

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#include "waypoint.h"

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#include "variables.h"

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#include "table/strings.h"

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#include "vehicle.h"

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#include "yapf/yapf.h"

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#include "date.h"

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enum {

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	MAX_WAYPOINTS_PER_TOWN = 64,

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};

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    30

/**

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 * Called if a new block is added to the waypoint-pool

    32

 */

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static void WaypointPoolNewBlock(uint start_item)

    34

{

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	Waypoint *wp;

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    37

	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.

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	 * TODO - This is just a temporary stage, this will be removed. */

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	for (wp = GetWaypoint(start_item); wp != NULL; wp = (wp->index + 1U < GetWaypointPoolSize()) ? GetWaypoint(wp->index + 1U) : NULL) wp->index = start_item++;

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}

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    42

DEFINE_OLD_POOL(Waypoint, Waypoint, WaypointPoolNewBlock, NULL)

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    47

static Waypoint* AllocateWaypoint()

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{

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	Waypoint *wp;

    50

    51

	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.

    52

	 * TODO - This is just a temporary stage, this will be removed. */

    53

	for (wp = GetWaypoint(0); wp != NULL; wp = (wp->index + 1U < GetWaypointPoolSize()) ? GetWaypoint(wp->index + 1U) : NULL) {

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		if (!IsValidWaypoint(wp)) {

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			uint index = wp->index;

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    57

			memset(wp, 0, sizeof(*wp));

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			wp->index = index;

    59

    60

			return wp;

    61

		}

    62

	}

    63

    64

	/* Check if we can add a block to the pool */

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	if (AddBlockToPool(&_Waypoint_pool)) return AllocateWaypoint();

    66

    67

	return NULL;

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}

    69

    73

static void UpdateWaypointSign(Waypoint* wp)

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{

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	Point pt = RemapCoords2(TileX(wp->xy) * TILE_SIZE, TileY(wp->xy) * TILE_SIZE);

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	SetDParam(0, wp->index);

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	UpdateViewportSignPos(&wp->sign, pt.x, pt.y - 0x20, STR_WAYPOINT_VIEWPORT);

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}

    79

    83

static void RedrawWaypointSign(const Waypoint* wp)

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{

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	MarkAllViewportsDirty(

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		wp->sign.left - 6,

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		wp->sign.top,

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		wp->sign.left + (wp->sign.width_1 << 2) + 12,

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		wp->sign.top + 48);

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}

    91

    95

void UpdateAllWaypointSigns()

    96

{

    97

	Waypoint *wp;

    98

    99

	FOR_ALL_WAYPOINTS(wp) {

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		UpdateWaypointSign(wp);

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	}

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}

   103

   108

void DestroyWaypoint(Waypoint *wp)

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{

   110

	RemoveOrderFromAllVehicles(OT_GOTO_WAYPOINT, wp->index);

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   112

	if (wp->string != STR_NULL) DeleteName(wp->string);

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   114

	RedrawWaypointSign(wp);

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}

   116

   121

static void MakeDefaultWaypointName(Waypoint* wp)

   122

{

   123

	Waypoint *local_wp;

   124

	bool used_waypoint[MAX_WAYPOINTS_PER_TOWN];

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	int i;

   126

   127

	wp->town_index = ClosestTownFromTile(wp->xy, (uint)-1)->index;

   128

   129

	memset(used_waypoint, 0, sizeof(used_waypoint));

   130

   131

	/* Find an unused waypoint number belonging to this town */

   132

	FOR_ALL_WAYPOINTS(local_wp) {

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		if (wp == local_wp) continue;

   134

   135

		if (local_wp->xy && local_wp->string == STR_NULL && local_wp->town_index == wp->town_index)

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			used_waypoint[local_wp->town_cn] = true;

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	}

   138

   139

	/* Find an empty spot */

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	for (i = 0; used_waypoint[i] && i < MAX_WAYPOINTS_PER_TOWN; i++) {}

   141

   142

	wp->string = STR_NULL;

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	wp->town_cn = i;

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}

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   150

static Waypoint *FindDeletedWaypointCloseTo(TileIndex tile)

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{

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	Waypoint *wp, *best = NULL;

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	uint thres = 8;

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   155

	FOR_ALL_WAYPOINTS(wp) {

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		if (wp->deleted) {

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			uint cur_dist = DistanceManhattan(tile, wp->xy);

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   159

			if (cur_dist < thres) {

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				thres = cur_dist;

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				best = wp;

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			}

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		}

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	}

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	return best;

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}

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   169

/**

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 * Update waypoint graphics id against saved GRFID/localidx.

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 * This is to ensure the chosen graphics are correct if GRF files are changed.

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 */

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void AfterLoadWaypoints()

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{

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	Waypoint *wp;

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   177

	FOR_ALL_WAYPOINTS(wp) {

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		uint i;

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   180

		if (wp->grfid == 0) continue;

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   182

		for (i = 0; i < GetNumCustomStations(STAT_CLASS_WAYP); i++) {

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			const StationSpec *statspec = GetCustomStationSpec(STAT_CLASS_WAYP, i);

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			if (statspec != NULL && statspec->grfid == wp->grfid && statspec->localidx == wp->localidx) {

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				wp->stat_id = i;

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				break;

   187

			}

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		}

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	}

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}

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   192

/** Convert existing rail to waypoint. Eg build a waypoint station over

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 * piece of rail

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 * @param tile tile where waypoint will be built

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 * @param p1 graphics for waypoint type, 0 indicates standard graphics

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 * @param p2 unused

   198

 *

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 * @todo When checking for the tile slope,

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 * distingush between "Flat land required" and "land sloped in wrong direction"

   201

 */

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int32 CmdBuildTrainWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

   204

	Waypoint *wp;

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	Slope tileh;

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	Axis axis;

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   208

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

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   210

	/* if custom gfx are used, make sure it is within bounds */

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	if (p1 >= GetNumCustomStations(STAT_CLASS_WAYP)) return CMD_ERROR;

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   213

	if (!IsTileType(tile, MP_RAILWAY) ||

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			GetRailTileType(tile) != RAIL_TILE_NORMAL || (

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				(axis = AXIS_X, GetTrackBits(tile) != TRACK_BIT_X) &&

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				(axis = AXIS_Y, GetTrackBits(tile) != TRACK_BIT_Y)

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			)) {

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		return_cmd_error(STR_1005_NO_SUITABLE_RAILROAD_TRACK);

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	}

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   221

	if (!CheckTileOwnership(tile)) return CMD_ERROR;

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	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

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   224

	tileh = GetTileSlope(tile, NULL);

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	if (tileh != SLOPE_FLAT &&

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			(!_patches.build_on_slopes || IsSteepSlope(tileh) || !(tileh & (0x3 << axis)) || !(tileh & ~(0x3 << axis)))) {

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		return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);

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	}

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   230

	if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);

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   232

	/* Check if there is an already existing, deleted, waypoint close to us that we can reuse. */

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	wp = FindDeletedWaypointCloseTo(tile);

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	if (wp == NULL) {

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		wp = AllocateWaypoint();

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		if (wp == NULL) return CMD_ERROR;

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		wp->town_index = 0;

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		wp->string = STR_NULL;

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		wp->town_cn = 0;

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	}

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   243

	if (flags & DC_EXEC) {

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		const StationSpec* statspec;

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   246

		MakeRailWaypoint(tile, GetTileOwner(tile), axis, GetRailType(tile), wp->index);

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		MarkTileDirtyByTile(tile);

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   249

		statspec = GetCustomStationSpec(STAT_CLASS_WAYP, p1);

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   251

		if (statspec != NULL) {

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			wp->stat_id = p1;

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			wp->grfid = statspec->grfid;

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			wp->localidx = statspec->localidx;

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		} else {

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			wp->stat_id = 0;

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			wp->grfid = 0;

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			wp->localidx = 0;

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		}

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		wp->deleted = 0;

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		wp->xy = tile;

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		wp->build_date = _date;

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   266

		if (wp->town_index == 0) MakeDefaultWaypointName(wp);

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		UpdateWaypointSign(wp);

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		RedrawWaypointSign(wp);

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		YapfNotifyTrackLayoutChange(tile, AxisToTrack(axis));

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	}

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	return _price.build_train_depot;

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}

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void WaypointsDailyLoop()

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{

   281

	Waypoint *wp;

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   283

	/* Check if we need to delete a waypoint */

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	FOR_ALL_WAYPOINTS(wp) {

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		if (wp->deleted != 0 && --wp->deleted == 0) DeleteWaypoint(wp);

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	}

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}

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int32 RemoveTrainWaypoint(TileIndex tile, uint32 flags, bool justremove)

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{

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	Waypoint *wp;

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   300

	/* Make sure it's a waypoint */

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	if (!IsTileType(tile, MP_RAILWAY) ||

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			!IsRailWaypoint(tile) ||

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			(!CheckTileOwnership(tile) && _current_player != OWNER_WATER) ||

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			!EnsureNoVehicle(tile)) {

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		return CMD_ERROR;

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	}

   307

   308

	if (flags & DC_EXEC) {

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		Track track = GetRailWaypointTrack(tile);

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		wp = GetWaypointByTile(tile);

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   312

		wp->deleted = 30; // let it live for this many days before we do the actual deletion.

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		RedrawWaypointSign(wp);

   314

   315

		if (justremove) {

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			MakeRailNormal(tile, GetTileOwner(tile), GetRailWaypointBits(tile), GetRailType(tile));

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			MarkTileDirtyByTile(tile);

   318

		} else {

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			DoClearSquare(tile);

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			SetSignalsOnBothDir(tile, track);

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		}

   322

		YapfNotifyTrackLayoutChange(tile, track);

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	}

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	return _price.remove_train_depot;

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}

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 * @param tile tile where waypoint is to be deleted

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 * @param p1 unused

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 * @param p2 unused

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 */

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int32 CmdRemoveTrainWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

   338

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   339

	return RemoveTrainWaypoint(tile, flags, true);

   340

}

   341

   344

 * @param tile unused

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 * @param p1 id of waypoint

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 * @param p2 unused

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 */

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int32 CmdRenameWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

   351

{

   352

	Waypoint *wp;

   353

   354

	if (!IsValidWaypointID(p1)) return CMD_ERROR;

   355

   356

	if (_cmd_text[0] != '\0') {

   357

		StringID str = AllocateNameUnique(_cmd_text, 0);

   358

   359

		if (str == 0) return CMD_ERROR;

   360

   361

		if (flags & DC_EXEC) {

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			wp = GetWaypoint(p1);

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			if (wp->string != STR_NULL) DeleteName(wp->string);

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   365

			wp->string = str;

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			wp->town_cn = 0;

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   368

			UpdateWaypointSign(wp);

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			MarkWholeScreenDirty();

   370

		} else {

   371

			DeleteName(str);

   372

		}

   373

	} else {

   374

		if (flags & DC_EXEC) {

   375

			wp = GetWaypoint(p1);

   376

			if (wp->string != STR_NULL) DeleteName(wp->string);

   377

   378

			MakeDefaultWaypointName(wp);

   379

			UpdateWaypointSign(wp);

   380

			MarkWholeScreenDirty();

   381

		}

   382

	}

   383

	return 0;

   384

}

   385

   391

Station *ComposeWaypointStation(TileIndex tile)

   392

{

   393

	Waypoint *wp = GetWaypointByTile(tile);

   394

   395

	/* instead of 'static Station stat' use byte array to avoid Station's destructor call upon exit. As

   396

	 * a side effect, the station is not constructed now. */

   397

	static byte stat_raw[sizeof(Station)];

   398

	static Station &stat = *(Station*)stat_raw;

   399

   400

	stat.train_tile = stat.xy = wp->xy;

   401

	stat.town = GetTown(wp->town_index);

   402

	stat.string_id = wp->string;

   403

	stat.build_date = wp->build_date;

   404

   405

	return &stat;

   406

}

   407

   415

void DrawWaypointSprite(int x, int y, int stat_id, RailType railtype)

   416

{

   417

	x += 33;

   418

	y += 17;

   419

   420

	if (!DrawStationTile(x, y, railtype, AXIS_X, STAT_CLASS_WAYP, stat_id)) {

   421

		DrawDefaultWaypointSprite(x, y, railtype);

   422

	}

   423

}

   424

   428

void FixOldWaypoints()

   429

{

   430

	Waypoint *wp;

   431

   432

	/* Convert the old 'town_or_string', to 'string' / 'town' / 'town_cn' */

   433

	FOR_ALL_WAYPOINTS(wp) {

   434

		wp->town_index = ClosestTownFromTile(wp->xy, (uint)-1)->index;

   435

		wp->town_cn = 0;

   436

		if (wp->string & 0xC000) {

   437

			wp->town_cn = wp->string & 0x3F;

   438

			wp->string = STR_NULL;

   439

		}

   440

	}

   441

}

   442

   443

void InitializeWaypoints()

   444

{

   445

	CleanPool(&_Waypoint_pool);

   446

	AddBlockToPool(&_Waypoint_pool);

   447

}

   448

   449

static const SaveLoad _waypoint_desc[] = {

   450

	SLE_CONDVAR(Waypoint, xy,         SLE_FILE_U16 | SLE_VAR_U32,  0, 5),

   451

	SLE_CONDVAR(Waypoint, xy,         SLE_UINT32,                  6, SL_MAX_VERSION),

   452

	SLE_CONDVAR(Waypoint, town_index, SLE_UINT16,                 12, SL_MAX_VERSION),

   453

	SLE_CONDVAR(Waypoint, town_cn,    SLE_UINT8,                  12, SL_MAX_VERSION),

   454

	    SLE_VAR(Waypoint, string,     SLE_UINT16),

   455

	    SLE_VAR(Waypoint, deleted,    SLE_UINT8),

   456

   457

	SLE_CONDVAR(Waypoint, build_date, SLE_FILE_U16 | SLE_VAR_I32,  3, 30),

   458

	SLE_CONDVAR(Waypoint, build_date, SLE_INT32,                  31, SL_MAX_VERSION),

   459

	SLE_CONDVAR(Waypoint, localidx,   SLE_UINT8,                   3, SL_MAX_VERSION),

   460

	SLE_CONDVAR(Waypoint, grfid,      SLE_UINT32,                 17, SL_MAX_VERSION),

   461

   462

	SLE_END()

   463

};

   464

   465

static void Save_WAYP()

   466

{

   467

	Waypoint *wp;

   468

   469

	FOR_ALL_WAYPOINTS(wp) {

   470

		SlSetArrayIndex(wp->index);

   471

		SlObject(wp, _waypoint_desc);

   472

	}

   473

}

   474

   475

static void Load_WAYP()

   476

{

   477

	int index;

   478

   479

	while ((index = SlIterateArray()) != -1) {

   480

		Waypoint *wp;

   481

   482

		if (!AddBlockIfNeeded(&_Waypoint_pool, index))

   483

			error("Waypoints: failed loading savegame: too many waypoints");

   484

   485

		wp = GetWaypoint(index);

   486

		SlObject(wp, _waypoint_desc);

   487

	}

   488

}

   489

   490

extern const ChunkHandler _waypoint_chunk_handlers[] = {

   491

	{ 'CHKP', Save_WAYP, Load_WAYP, CH_ARRAY | CH_LAST},

   492

};