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Cybermaxke/InventoryTitleHelper

Last active October 13, 2023 09:38
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[CraftBukkit/Spigot] Send a new title of the currently opened inventory.
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InventoryTitleHelper
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.inventory.Inventory;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* A inventory helper that allows you to change the title of the current
* opened inventory.
*/
public class InventoryTitleHelper {
// Methods
private static Method m_Player_GetHandle;
private static Method m_PlayerConnection_sendPacket;
private static Method m_CraftChatMessage_fromString;
private static Method m_EntityPlayer_updateInventory;
// Fields
private static Field f_EntityPlayer_playerConnection;
private static Field f_EntityPlayer_activeContainer;
private static Field f_Container_windowId;
// Constructors
private static Constructor<?> c_PacketOpenWindow;
// The version of the server (nms version like v1_5_R3)
private static String nms_version;
private static String nms_package;
private static String crb_package;
/**
* Sends a new inventory title to the client.
*
* @param player the player
* @param title the new title
*/
public static void sendInventoryTitle(Player player, String title) {
checkNotNull(player, "player");
try {
sendInventoryTitle0(player, title);
} catch (Exception e) {
e.printStackTrace();
}
}
private static void sendInventoryTitle0(Player player, String title) throws Exception {
Inventory inventory = player.getOpenInventory().getTopInventory();
if (inventory == null) {
return;
}
if (m_Player_GetHandle == null) {
m_Player_GetHandle = player.getClass().getMethod("getHandle");
}
Object nms_EntityPlayer = m_Player_GetHandle.invoke(player);
if (f_EntityPlayer_playerConnection == null) {
f_EntityPlayer_playerConnection = nms_EntityPlayer.getClass().getField("playerConnection");
}
Object nms_PlayerConnection = f_EntityPlayer_playerConnection.get(nms_EntityPlayer);
if (f_EntityPlayer_activeContainer == null) {
f_EntityPlayer_activeContainer = nms_EntityPlayer.getClass().getField("activeContainer");
}
Object nms_Container = f_EntityPlayer_activeContainer.get(nms_EntityPlayer);
if (f_Container_windowId == null) {
f_Container_windowId = nms_Container.getClass().getField("windowId");
}
int windowId = f_Container_windowId.getInt(nms_Container);
String version = getNmsVersion();
if (version.startsWith("v1_5_") || version.startsWith("v1_6_")) {
sendPacket15a16a17(nms_PlayerConnection, nms_EntityPlayer, nms_Container, windowId, inventory, title, false);
} else if (version.startsWith("v1_7_")) {
sendPacket15a16a17(nms_PlayerConnection, nms_EntityPlayer, nms_Container, windowId, inventory, title, true);
} else if (version.equals("v1_8_R1") || version.equals("v1_8_R2")) {
sendPacket18(nms_PlayerConnection, nms_EntityPlayer, nms_Container, windowId, inventory, title);
}
}
private static void sendPacket15a16a17(Object nms_playerConnection, Object nms_EntityPlayer, Object nms_Container, int windowId, Inventory inventory, String title, boolean flag) throws Exception {
if (c_PacketOpenWindow == null) {
if (flag) {
c_PacketOpenWindow = findNmsClass("PacketPlayOutOpenWindow").getConstructor(int.class, int.class, String.class, int.class, boolean.class);
} else {
c_PacketOpenWindow = findNmsClass("Packet100OpenWindow").getConstructor(int.class, int.class, String.class, int.class, boolean.class);
}
}
int id;
int size;
switch (inventory.getType()) {
case ANVIL:
id = 8;
size = 9;
break;
case BEACON:
id = 7;
size = 1;
break;
case BREWING:
id = 5;
size = 4;
break;
case CRAFTING:
return;
case CREATIVE:
return;
case DISPENSER:
id = 3;
size = 9;
break;
case DROPPER:
id = 10;
size = 9;
break;
case ENCHANTING:
id = 4;
size = 9;
break;
case ENDER_CHEST:
case CHEST:
id = 0;
size = inventory.getSize();
break;
case FURNACE:
id = 2;
size = 2;
break;
case HOPPER:
id = 9;
size = 5;
break;
case MERCHANT:
id = 6;
size = 3;
break;
case PLAYER:
return;
case WORKBENCH:
id = 1;
size = 9;
break;
default:
return;
}
if (title != null && title.length() > 32) {
title = title.substring(0, 32);
}
if (m_EntityPlayer_updateInventory == null) {
m_EntityPlayer_updateInventory = nms_EntityPlayer.getClass().getMethod("updateInventory", findNmsClass("Container"));
}
Object packet = c_PacketOpenWindow.newInstance(windowId, id, title != null ? title : "", size, true);
sendPacket(nms_playerConnection, packet);
m_EntityPlayer_updateInventory.invoke(nms_EntityPlayer, nms_Container);
}
private static void sendPacket18(Object nms_playerConnection, Object nms_EntityPlayer, Object nms_Container, int windowId, Inventory inventory, String title) throws Exception {
if (c_PacketOpenWindow == null) {
c_PacketOpenWindow = findNmsClass("PacketPlayOutOpenWindow").getConstructor(int.class, String.class, findNmsClass("IChatBaseComponent"), int.class);
}
String id;
int size = 0;
switch (inventory.getType()) {
case ANVIL:
id = "minecraft:anvil";
break;
case BEACON:
id = "minecraft:beacon";
break;
case BREWING:
id = "minecraft:brewing_stand";
break;
case CRAFTING:
return;
case CREATIVE:
return;
case DISPENSER:
id = "minecraft:dispenser";
break;
case DROPPER:
id = "minecraft:dropper";
break;
case ENCHANTING:
id = "minecraft:enchanting_table";
break;
case ENDER_CHEST:
case CHEST:
id = "minecraft:chest";
size = inventory.getSize();
break;
case FURNACE:
id = "minecraft:furnace";
break;
case HOPPER:
id = "minecraft:hopper";
break;
case MERCHANT:
id = "minecraft:villager";
size = 3;
break;
case PLAYER:
return;
case WORKBENCH:
id = "minecraft:crafting_table";
break;
default:
return;
}
if (m_CraftChatMessage_fromString == null) {
m_CraftChatMessage_fromString = findCrbClass("util.CraftChatMessage").getMethod("fromString", String.class);
}
if (m_EntityPlayer_updateInventory == null) {
m_EntityPlayer_updateInventory = nms_EntityPlayer.getClass().getMethod("updateInventory", findNmsClass("Container"));
}
Object nms_title = ((Object[]) m_CraftChatMessage_fromString.invoke(null, title))[0];
Object nms_packet = c_PacketOpenWindow.newInstance(windowId, id, nms_title, size);
sendPacket(nms_playerConnection, nms_packet);
m_EntityPlayer_updateInventory.invoke(nms_EntityPlayer, nms_Container);
}
private static void sendPacket(Object playerConnection, Object packet) throws Exception {
if (m_PlayerConnection_sendPacket == null) {
m_PlayerConnection_sendPacket = playerConnection.getClass().getMethod("sendPacket", findNmsClass("Packet"));
}
m_PlayerConnection_sendPacket.invoke(playerConnection, packet);
}
private static String getNmsVersion() {
if (nms_version == null) {
nms_version = Bukkit.getServer().getClass().getPackage().getName().replace("org.bukkit.craftbukkit.", "");
}
return nms_version;
}
private static String getNmsPackage() {
if (nms_package == null) {
nms_package = "net.minecraft.server." + getNmsVersion();
}
return nms_package;
}
private static String getCrbPackage() {
if (crb_package == null) {
crb_package = "org.bukkit.craftbukkit." + getNmsVersion();
}
return crb_package;
}
private static Class<?> findNmsClass(String name) throws Exception {
return Class.forName(getNmsPackage() + "." + name);
}
private static Class<?> findCrbClass(String name) throws Exception {
return Class.forName(getCrbPackage() + "." + name);
}
}
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