net.minecraft.network.play.server.SPacketSetSlot Java Examples

@Listener
public void onReceivePacket (EventReceivePacket event) {
    if (event.getStage() == EventStageable.EventStage.PRE) {
        if (event.getPacket() instanceof SPacketSetSlot) {
            // Check if this packet updates the recipe result and if the result is not empty
            if (((SPacketSetSlot) event.getPacket()).getSlot() == 0 && ((SPacketSetSlot) event.getPacket()).getStack().getItem() != Items.AIR) {
                Minecraft mc = Minecraft.getMinecraft();

                if (mc.currentScreen instanceof GuiInventory || mc.currentScreen instanceof GuiCrafting) {
                    mc.playerController.windowClick(mc.player.openContainer.windowId, 0, 0, ClickType.QUICK_MOVE, mc.player);
                    mc.playerController.updateController();
                }
            }
        }
    }
}
 

public static void handleEditBookEvent(EntityPlayerMP player, ItemStack newBookItem) {
    int itemInHandIndex = player.inventory.currentItem;

    PlayerEditBookEvent editBookEvent = new PlayerEditBookEvent(player.getBukkitEntity(), player.inventory.currentItem, (BookMeta) CraftItemStack.getItemMeta(player.inventory.getCurrentItem()), (BookMeta) CraftItemStack.getItemMeta(newBookItem), newBookItem.getItem() == Items.WRITTEN_BOOK);
    player.world.getServer().getPluginManager().callEvent(editBookEvent);
    ItemStack itemInHand = player.inventory.getStackInSlot(itemInHandIndex);

    // If they've got the same item in their hand, it'll need to be updated.
    if (itemInHand != null && itemInHand.getItem() == Items.WRITABLE_BOOK) {
        if (!editBookEvent.isCancelled()) {
            if (editBookEvent.isSigning()) {
                itemInHand.setItem(Items.WRITTEN_BOOK);
            }
            CraftMetaBook meta = (CraftMetaBook) editBookEvent.getNewBookMeta();
            List<ITextComponent> pages = meta.pages;
            for (int i = 0; i < pages.size(); i++) {
                pages.set(i, stripEvents(pages.get(i)));
            }
            CraftItemStack.setItemMeta(itemInHand, meta);
        }

        // Client will have updated its idea of the book item; we need to overwrite that
        Slot slot = player.openContainer.getSlotFromInventory(player.inventory, itemInHandIndex);
        player.connection.sendPacket(new SPacketSetSlot(player.openContainer.windowId, slot.slotNumber, itemInHand));
    }
}
 

@SubscribeEvent
public void onPacketReceived(PacketEvent.Incoming.Pre event) {
  if (event.getPacket() instanceof SPacketSetSlot && getLocalPlayer() != null) {
    int currentSlot = getLocalPlayer().inventory.currentItem;
    
    if (((SPacketSetSlot) event.getPacket()).getSlot() != currentSlot) {
      getNetworkManager()
          .sendPacket(
              new CPacketHeldItemChange(currentSlot)); // set server's slot back to our slot
      FastReflection.Methods.KeyBinding_unPress.invoke(
          MC.gameSettings.keyBindUseItem); // likely will eating so stop right clicking
      
      event.setCanceled(true);
    }
  }
}
 

@Override
public void addListener(IContainerListener listener)
{
    if (this.listeners.contains(listener))
    {
        throw new IllegalArgumentException("Listener already listening");
    }
    else
    {
        this.listeners.add(listener);

        if (listener instanceof EntityPlayerMP)
        {
            EntityPlayerMP player = (EntityPlayerMP) listener;
            player.connection.sendPacket(new SPacketSetSlot(-1, -1, player.inventory.getItemStack()));
            this.syncAllSlots(player);
        }

        this.detectAndSendChanges();
    }
}
 

@Override
public void sendHeldItemUpdate() {
    for (IContainerListener listener : listeners) {
        EntityPlayerMP player = (EntityPlayerMP) listener;
        player.connection.sendPacket(new SPacketSetSlot(-1, -1, player.inventory.getItemStack()));
    }
}
 

@Override
public void setItem(int index, ItemStack item) {
    super.setItem(index, item);
    if (this.getHolder() == null) return;
    EntityPlayerMP player = ((CraftPlayer) this.getHolder()).getHandle();
    if (player.connection == null) return;
    // PacketPlayOutSetSlot places the items differently than setItem()
    //
    // Between, and including, index 9 (the first index outside of the hotbar) and index 35 (the last index before
    // armor slots) both PacketPlayOutSetSlot and setItem() places the items in the player's inventory the same way.
    // Index 9 starts at the upper left corner of the inventory and moves to the right as it increases. When it
    // reaches the end of the line it goes back to the left side of the new line in the inventory. Basically, it
    // follows the path your eyes would follow as you read a book.
    //
    // The player's hotbar is indexed 0-8 in setItem(). The order goes: 0-8 hotbar, 9-35 normal inventory, 36 boots,
    // 37 leggings, 38 chestplate, and 39 helmet. For indexes > 39 an ArrayIndexOutOfBoundsException will be thrown.
    //
    // PacketPlayOutSetSlot works very differently. Slots 0-8 are as follows: 0 crafting output, 1-4 crafting input,
    // 5 helmet, 6 chestplate, 7 leggings, and 8 boots. Then, 9-35 work exactly the same as setItem(). The hotbar
    // for PacketPlayOutSetSlot starts at index 36, and continues to index 44. Items placed where index is < 0 or
    // > 44 have no action. Basically, the upper part of the player's inventory (crafting area and armor slots) is
    // the first "row" of 9 slots for PacketPlayOutSetSlot. From there the rows work as normal, from left to right
    // all the way down, including the hotbar.
    //
    // With this in mind, we have to modify the index we give PacketPlayOutSetSlot to match the index we intended
    // with setItem(). First, if the index is 0-8, we need to add 36, or 4 rows worth of slots, to the index. This
    // will push the item down to the correct spot in the hotbar.
    //
    // Now when index is > 35 (if index > 39 an ArrayIndexOutOfBoundsException will be thrown, so we need not worry
    // about it) then we need to reset the index, and then count backwards  from the "top" of the inventory. That is
    // to say, we first find (index - 36), which will give us the index required for the armor slots. Now, we need
    // to reverse the order of the index from 8. That means we need 0 to correspond to 8, 1 to correspond to 7,
    // 2 to correspond to 6, and 3 to correspond to 5. We do this simply by taking the result of (index - 36) and
    // subtracting that value from 8.
    if (index < InventoryPlayer.getHotbarSize()) {
        index += 36;
    } else if (index > 39) {
        index += 5; // Off hand
    } else if (index > 35) {
        index = 8 - (index - 36);
    }
    player.connection.sendPacket(new SPacketSetSlot(player.inventoryContainer.windowId, index, CraftItemStack.asNMSCopy(item)));
}