public static Container callInventoryOpenEvent(EntityPlayerMP player, Container container, boolean cancelled) {
    if (player.openContainer != player.inventoryContainer) { // fire INVENTORY_CLOSE if one already open
        player.connection.processCloseWindow(new CPacketCloseWindow(player.openContainer.windowId));
    }

    CraftServer server = player.world.getServer();
    CraftPlayer craftPlayer = player.getBukkitEntity();
    player.openContainer.transferTo(container, craftPlayer);

    InventoryOpenEvent event = new InventoryOpenEvent(container.getBukkitView());
    event.setCancelled(cancelled);
    server.getPluginManager().callEvent(event);

    if (event.isCancelled()) {
        container.transferTo(player.openContainer, craftPlayer);
        return null;
    }

    return container;
}
 

@Override
public void onDisable() {
    super.onDisable();
    if (Minecraft.getMinecraft().world != null) {
        Minecraft.getMinecraft().player.connection.sendPacket(new CPacketCloseWindow(Minecraft.getMinecraft().player.inventoryContainer.windowId));
    }
}
 

@Listener
public void sendPacket(EventSendPacket event) {
    if (event.getStage() == EventStageable.EventStage.PRE) {
        if (event.getPacket() instanceof CPacketCloseWindow) {
            final CPacketCloseWindow packet = (CPacketCloseWindow) event.getPacket();
            if (packet.windowId == Minecraft.getMinecraft().player.inventoryContainer.windowId) {
                event.setCanceled(true);
            }
        }
    }
}
 

public void openInventory(InventoryView inventory) {
    if (!(getHandle() instanceof EntityPlayerMP)) return; // TODO: NPC support?
    if (((EntityPlayerMP) getHandle()).connection == null) return;
    if (getHandle().inventoryContainer != getHandle().inventoryContainer) {
        // fire INVENTORY_CLOSE if one already open
        ((EntityPlayerMP) getHandle()).connection.processCloseWindow(new CPacketCloseWindow(getHandle().inventoryContainer.windowId));
    }
    EntityPlayerMP player = (EntityPlayerMP) getHandle();
    Container container;
    if (inventory instanceof CraftInventoryView) {
        container = ((CraftInventoryView) inventory).getHandle();
    } else {
        container = new CraftContainer(inventory, this.getHandle(), player.getNextWindowIdCB());
    }

    // Trigger an INVENTORY_OPEN event
    container = CraftEventFactory.callInventoryOpenEvent(player, container);
    if (container == null) {
        return;
    }

    // Now open the window
    InventoryType type = inventory.getType();
    String windowType = CraftContainer.getNotchInventoryType(type);
    String title = inventory.getTitle();
    int size = inventory.getTopInventory().getSize();
    player.connection.sendPacket(new SPacketOpenWindow(container.windowId, windowType, new TextComponentString(title), size));
    player.inventoryContainer = container;
    player.inventoryContainer.addListener(player);
}