Added cleanup of cursor

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/utils/cursor/RCursor.java

@@ -112,6 +112,11 @@ public class RCursor {
         onClickHandler.handle(cursorLocation, isHittingEntity, action);
     }
 
+    public void close() {
+        cursorServer.close();
+        RCursorManager.getInstance().unregisterCursor(this);
+    }
+
     @AllArgsConstructor
     public enum CursorMode {
         FREE((player, rayTraceResult) -> {

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/utils/cursor/RCursorManager.java

@@ -8,6 +8,7 @@ import lombok.Getter;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerInteractEvent;
 
 import java.lang.ref.SoftReference;
@@ -18,7 +19,7 @@ import java.util.Set;
 import java.util.function.BiFunction;
 
 @Linked
-public class RCursorManager {
+public class RCursorManager implements Listener {
     @Getter
     private static RCursorManager instance;
 
@@ -50,10 +51,23 @@ public class RCursorManager {
         TinyProtocol.instance.addFilter(positionLookPacketClass, function);
     }
 
-    public void registerCursor(RCursor cursor) {
+    void registerCursor(RCursor cursor) {
+        SoftReference<RCursor> currentPlayerCursorRef = activeCursors.get(cursor.getOwner());
+        if(currentPlayerCursorRef != null) {
+            RCursor currentCursor = currentPlayerCursorRef.get();
+            if(currentCursor != null) {
+                currentCursor.close();
+            };
+        };
+
         activeCursors.put(cursor.getOwner(), new SoftReference<>(cursor));
     }
 
+    void unregisterCursor(RCursor cursor) {
+        activeCursors.remove(cursor.getOwner());
+    }
+
+
     private void updateCursor(Player player) {
         if (!activeCursors.containsKey(player)) {
             return;
@@ -85,9 +99,11 @@ public class RCursorManager {
     @EventHandler
     private void handlePlayerInteract(PlayerInteractEvent event) {
         Player player = event.getPlayer();
-        RCursor cursorOfPlayer = activeCursors.get(player).get();
 
-        if(cursorOfPlayer == null) return;
+        SoftReference<RCursor> cursorOfPlayerRef = activeCursors.get(player);
+        if(cursorOfPlayerRef == null) return;
+
+        RCursor cursorOfPlayer = cursorOfPlayerRef.get();
 
         cursorOfPlayer.handleClick(event.getAction());
     }