(svn r18715) -Codechange: make StationFinder a subclass of TileArea

src/industry_cmd.cpp

@@ -509,7 +509,7 @@ static void TransportIndustryGoods(TileIndex tile)
 	const IndustrySpec *indspec = GetIndustrySpec(i->type);
 	bool moved_cargo = false;
 
-	StationFinder stations(i->xy, i->width, i->height);
+	StationFinder stations(TileArea(i->xy, i->width, i->height));
 
 	for (uint j = 0; j < lengthof(i->produced_cargo_waiting); j++) {
 		uint cw = min(i->produced_cargo_waiting[j], 255);

src/station_cmd.cpp

@@ -3035,7 +3035,7 @@ void FindStationsAroundTiles(TileIndex tile, int w_prod, int h_prod, StationList
 const StationList *StationFinder::GetStations()
 {
 	if (this->tile != INVALID_TILE) {
-		FindStationsAroundTiles(this->tile, this->x_extent, this->y_extent, &this->stations);
+		FindStationsAroundTiles(this->tile, this->w, this->h, &this->stations);
 		this->tile = INVALID_TILE;
 	}
 	return &this->stations;

src/station_type.h

@@ -99,19 +99,14 @@ typedef SmallVector<Station *, 2> StationList;
  * Structure contains cached list of stations nearby. The list
  * is created upon first call to GetStations()
  */
-class StationFinder {
+class StationFinder : TileArea {
 	StationList stations; ///< List of stations nearby
-	TileIndex tile;       ///< Northern tile of producer, INVALID_TILE when # stations is valid
-	int x_extent;         ///< Width of producer
-	int y_extent;         ///< Height of producer
 public:
 	/**
 	 * Constructs StationFinder
-	 * @param t northern tile
-	 * @param dx width of producer
-	 * @param dy height of producer
+	 * @param area the area to search from
 	 */
-	StationFinder(TileIndex t, int dx, int dy) : tile(t), x_extent(dx), y_extent(dy) {}
+	StationFinder(const TileArea &area) : TileArea(area) {}
 	const StationList *GetStations();
 };
 

src/town_cmd.cpp

@@ -465,7 +465,7 @@ static void TileLoop_Town(TileIndex tile)
 	Town *t = Town::GetByTile(tile);
 	uint32 r = Random();
 
-	StationFinder stations(tile, 1, 1);
+	StationFinder stations(TileArea(tile, 1, 1));
 
 	if (HasBit(hs->callback_mask, CBM_HOUSE_PRODUCE_CARGO)) {
 		for (uint i = 0; i < 256; i++) {

src/unmovable_cmd.cpp

@@ -343,7 +343,7 @@ static void TileLoop_Unmovable(TileIndex tile)
 	uint level = GetCompanyHQSize(tile) + 1;
 	assert(level < 6);
 
-	StationFinder stations(tile, 2, 2);
+	StationFinder stations(TileArea(tile, 2, 2));
 
 	uint r = Random();
 	/* Top town buildings generate 250, so the top HQ type makes 256. */