Add trident pickup event

src/main/java/cn/nukkit/Player.java

@@ -23,6 +23,7 @@
 import cn.nukkit.event.inventory.InventoryCloseEvent;
 import cn.nukkit.event.inventory.InventoryPickupArrowEvent;
 import cn.nukkit.event.inventory.InventoryPickupItemEvent;
+import cn.nukkit.event.inventory.InventoryPickupTridentEvent;
 import cn.nukkit.event.player.*;
 import cn.nukkit.event.player.PlayerAsyncPreLoginEvent.LoginResult;
 import cn.nukkit.event.player.PlayerInteractEvent.Action;
@@ -4928,6 +4929,12 @@ public boolean pickupEntity(Entity entity, boolean near) {
                     return false;
                 }
 
+                InventoryPickupTridentEvent ev = new InventoryPickupTridentEvent(this.inventory, (EntityThrownTrident) entity);
+                this.server.getPluginManager().callEvent(ev);
+                if (ev.isCancelled()) {
+                    return false;
+                }
+
                 TakeItemEntityPacket pk = new TakeItemEntityPacket();
                 pk.entityId = this.getId();
                 pk.target = entity.getId();

src/main/java/cn/nukkit/event/inventory/InventoryPickupTridentEvent.java

@@ -0,0 +1,26 @@
+package cn.nukkit.event.inventory;
+
+import cn.nukkit.entity.projectile.EntityThrownTrident;
+import cn.nukkit.event.Cancellable;
+import cn.nukkit.event.HandlerList;
+import cn.nukkit.inventory.Inventory;
+
+public class InventoryPickupTridentEvent extends InventoryEvent implements Cancellable {
+
+    private static final HandlerList handlers = new HandlerList();
+
+    public static HandlerList getHandlers() {
+        return handlers;
+    }
+
+    private final EntityThrownTrident trident;
+
+    public InventoryPickupTridentEvent(Inventory inventory, EntityThrownTrident trident) {
+        super(inventory);
+        this.trident = trident;
+    }
+
+    public EntityThrownTrident getTrident() {
+        return trident;
+    }
+}