# HG changeset patch
# User peter1138 <peter1138@openttd.org>
# Date 1149347439 0
# Node ID 7f38159bcb1d588b32ad60fc6ca296d691199037
# Parent  092e19a5110ec1a14615cd2ebf7b0b75e4f9020d
(svn r5084) - Add owner attribute to canals and locks. This makes them more useful in multiplayer games, as before, anyone could delete any canal or lock tile. This doesn't affect whose ships can use whose canals or locks.

diff --git a/water_cmd.c b/water_cmd.c
--- a/water_cmd.c
+++ b/water_cmd.c
@@ -148,7 +148,7 @@
 	}
 
 	if (flags & DC_EXEC) {
-		MakeLock(tile, dir);
+		MakeLock(tile, _current_player, dir);
 		MarkTileDirtyByTile(tile);
 		MarkTileDirtyByTile(tile - delta);
 		MarkTileDirtyByTile(tile + delta);
@@ -161,6 +161,8 @@
 {
 	TileIndexDiff delta = TileOffsByDir(GetLockDirection(tile));
 
+	if (!CheckTileOwnership(tile)) return CMD_ERROR;
+
 	// make sure no vehicle is on the tile.
 	if (!EnsureNoVehicle(tile) || !EnsureNoVehicle(tile + delta) || !EnsureNoVehicle(tile - delta))
 		return CMD_ERROR;
@@ -249,7 +251,11 @@
 		cost += ret;
 
 		if (flags & DC_EXEC) {
-			MakeWater(tile);
+			if (TileHeight(tile) == 0) {
+				MakeWater(tile);
+			} else {
+				MakeCanal(tile, _current_player);
+			}
 			MarkTileDirtyByTile(tile);
 			MarkTilesAroundDirty(tile);
 		}
@@ -279,6 +285,8 @@
 				return_cmd_error(STR_0002_TOO_CLOSE_TO_EDGE_OF_MAP);
 			}
 
+			if (GetTileOwner(tile) != OWNER_WATER && !CheckTileOwnership(tile)) return CMD_ERROR;
+
 			if (flags & DC_EXEC) DoClearSquare(tile);
 			return _price.clear_water;
 
diff --git a/water_map.h b/water_map.h
--- a/water_map.h
+++ b/water_map.h
@@ -95,6 +95,16 @@
 	_m[t].m5 = 1;
 }
 
+static inline void MakeCanal(TileIndex t, Owner o)
+{
+	SetTileType(t, MP_WATER);
+	SetTileOwner(t, o);
+	_m[t].m2 = 0;
+	_m[t].m3 = 0;
+	_m[t].m4 = 0;
+	_m[t].m5 = 0;
+}
+
 static inline void MakeShipDepot(TileIndex t, Owner o, DepotPart base, Axis a)
 {
 	SetTileType(t, MP_WATER);
@@ -105,23 +115,23 @@
 	_m[t].m5 = base + a * 2;
 }
 
-static inline void MakeLockTile(TileIndex t, byte section)
+static inline void MakeLockTile(TileIndex t, Owner o, byte section)
 {
 	SetTileType(t, MP_WATER);
-	SetTileOwner(t, OWNER_WATER);
+	SetTileOwner(t, o);
 	_m[t].m2 = 0;
 	_m[t].m3 = 0;
 	_m[t].m4 = 0;
 	_m[t].m5 = section;
 }
 
-static inline void MakeLock(TileIndex t, DiagDirection d)
+static inline void MakeLock(TileIndex t, Owner o, DiagDirection d)
 {
 	TileIndexDiff delta = TileOffsByDir(d);
 
-	MakeLockTile(t, LOCK_MIDDLE + d);
-	MakeLockTile(t - delta, LOCK_LOWER + d);
-	MakeLockTile(t + delta, LOCK_UPPER + d);
+	MakeLockTile(t, o, LOCK_MIDDLE + d);
+	MakeLockTile(t - delta, o, LOCK_LOWER + d);
+	MakeLockTile(t + delta, o, LOCK_UPPER + d);
 }
 
 #endif