Support 1.13-pre7

internal/pom.xml

@@ -41,8 +41,8 @@
       <id>recent</id>
       <!-- The recent profile is for the most recent 2 versions. -->
       <modules>
-        <module>v1_11_R1</module>
         <module>v1_12_R1</module>
+        <module>v1_13_R1</module>
       </modules>
     </profile>
 
@@ -71,6 +71,7 @@
         <module>v1_10_R1</module>
         <module>v1_11_R1</module>
         <module>v1_12_R1</module>
+        <module>v1_13_R1</module>
       </modules>
     </profile>
 

internal/v1_13_R1/pom.xml

@@ -0,0 +1,57 @@
+<!--
+  ~ Copyright (C) 2011-2018 lishid. All rights reserved.
+  ~
+  ~ This program is free software: you can redistribute it and/or modify
+  ~ it under the terms of the GNU General Public License as published by
+  ~ the Free Software Foundation, version 3.
+  ~
+  ~ This program is distributed in the hope that it will be useful,
+  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+  ~ GNU General Public License for more details.
+  ~
+  ~ You should have received a copy of the GNU General Public License
+  ~ along with this program. If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>com.lishid</groupId>
+    <artifactId>openinvinternal</artifactId>
+    <version>3.3.4-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>openinvadapter1_13_R1</artifactId>
+  <name>OpenInvAdapter1_13_R1</name>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.spigotmc</groupId>
+      <artifactId>spigot</artifactId>
+      <version>1.13-pre7-R0.1-SNAPSHOT</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.lishid</groupId>
+      <artifactId>openinvcommon</artifactId>
+      <version>3.3.4-SNAPSHOT</version>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.6.1</version>
+        <configuration>
+          <source>1.8</source>
+          <target>1.8</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

internal/v1_13_R1/src/main/java/com/lishid/openinv/internal/v1_13_R1/AnySilentContainer.java

@@ -0,0 +1,293 @@
+/*
+ * Copyright (C) 2011-2018 lishid. All rights reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.lishid.openinv.internal.v1_13_R1;
+
+import java.lang.reflect.Field;
+
+import com.lishid.openinv.internal.IAnySilentContainer;
+
+import net.minecraft.server.v1_13_R1.BlockChestTrapped;
+import net.minecraft.server.v1_13_R1.ChatMessage;
+import net.minecraft.server.v1_13_R1.VoxelShapes;
+import org.bukkit.Material;
+import org.bukkit.Statistic;
+import org.bukkit.block.BlockState;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.InventoryView;
+
+import net.minecraft.server.v1_13_R1.AxisAlignedBB;
+import net.minecraft.server.v1_13_R1.Block;
+import net.minecraft.server.v1_13_R1.BlockChest;
+import net.minecraft.server.v1_13_R1.BlockEnderChest;
+import net.minecraft.server.v1_13_R1.BlockPosition;
+import net.minecraft.server.v1_13_R1.BlockShulkerBox;
+import net.minecraft.server.v1_13_R1.Entity;
+import net.minecraft.server.v1_13_R1.EntityOcelot;
+import net.minecraft.server.v1_13_R1.EntityPlayer;
+import net.minecraft.server.v1_13_R1.EnumDirection;
+import net.minecraft.server.v1_13_R1.EnumGamemode;
+import net.minecraft.server.v1_13_R1.IBlockData;
+import net.minecraft.server.v1_13_R1.ITileInventory;
+import net.minecraft.server.v1_13_R1.InventoryEnderChest;
+import net.minecraft.server.v1_13_R1.InventoryLargeChest;
+import net.minecraft.server.v1_13_R1.PlayerInteractManager;
+import net.minecraft.server.v1_13_R1.TileEntity;
+import net.minecraft.server.v1_13_R1.TileEntityChest;
+import net.minecraft.server.v1_13_R1.TileEntityEnderChest;
+import net.minecraft.server.v1_13_R1.TileEntityShulkerBox;
+import net.minecraft.server.v1_13_R1.World;
+
+public class AnySilentContainer implements IAnySilentContainer {
+
+    private Field playerInteractManagerGamemode;
+
+    public AnySilentContainer() {
+        try {
+            this.playerInteractManagerGamemode = PlayerInteractManager.class.getDeclaredField("gamemode");
+            this.playerInteractManagerGamemode.setAccessible(true);
+        } catch (NoSuchFieldException | SecurityException e) {
+            System.err.println("[OpenInv] Unable to directly write player gamemode! SilentChest will fail.");
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public boolean isAnySilentContainer(final org.bukkit.block.Block block) {
+        if (block.getType() == Material.ENDER_CHEST) {
+            return true;
+        }
+        BlockState state = block.getState();
+        return state instanceof org.bukkit.block.Chest
+                || state instanceof org.bukkit.block.ShulkerBox;
+    }
+
+    @Override
+    public boolean isAnyContainerNeeded(final Player p, final org.bukkit.block.Block b) {
+        EntityPlayer player = com.lishid.openinv.internal.v1_13_R1.PlayerDataManager.getHandle(p);
+        World world = player.world;
+        BlockPosition blockPosition = new BlockPosition(b.getX(), b.getY(), b.getZ());
+        IBlockData blockData = world.getType(blockPosition);
+        Block block = blockData.getBlock();
+
+        if (block instanceof BlockShulkerBox) {
+            return this.isBlockedShulkerBox(world, blockPosition, blockData);
+        }
+
+        if (block instanceof BlockEnderChest) {
+            // Ender chests are not blocked by ocelots.
+            return world.getType(blockPosition.up()).isOccluding();
+        }
+
+        // Check if chest is blocked or has an ocelot on top
+        if (this.isBlockedChest(world, blockPosition)) {
+            return true;
+        }
+
+        // Check for matching adjacent chests that are blocked or have an ocelot on top
+        for (EnumDirection localEnumDirection : EnumDirection.EnumDirectionLimit.HORIZONTAL) {
+            BlockPosition localBlockPosition = blockPosition.shift(localEnumDirection);
+            Block localBlock = world.getType(localBlockPosition).getBlock();
+
+            if (localBlock != block) {
+                continue;
+            }
+
+            TileEntity localTileEntity = world.getTileEntity(localBlockPosition);
+            if (!(localTileEntity instanceof TileEntityChest)) {
+                continue;
+            }
+
+            if (this.isBlockedChest(world, localBlockPosition)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private boolean isBlockedShulkerBox(final World world, final BlockPosition blockPosition,
+                                        final IBlockData blockData) {
+        // For reference, look at net.minecraft.server.BlockShulkerBox
+        TileEntity tile = world.getTileEntity(blockPosition);
+
+        if (!(tile instanceof TileEntityShulkerBox)) {
+            return false;
+        }
+
+        EnumDirection enumDirection = blockData.get(BlockShulkerBox.a);
+        if (((TileEntityShulkerBox) tile).r() == TileEntityShulkerBox.AnimationPhase.CLOSED) {
+            AxisAlignedBB axisAlignedBB = VoxelShapes.b().a()
+                    .b(0.5F * enumDirection.getAdjacentX(), 0.5F * enumDirection.getAdjacentY(), 0.5F * enumDirection.getAdjacentZ())
+                    .a(enumDirection.getAdjacentX(), enumDirection.getAdjacentY(), enumDirection.getAdjacentZ());
+            return !world.getCubes(null, axisAlignedBB.a(blockPosition.shift(enumDirection)));
+        }
+
+        return false;
+    }
+
+    private boolean isBlockedChest(final World world, final BlockPosition blockPosition) {
+        // For reference, loot at net.minecraft.server.BlockChest
+        return world.getType(blockPosition.up()).isOccluding() || this.hasOcelotOnTop(world, blockPosition);
+    }
+
+    private boolean hasOcelotOnTop(final World world, final BlockPosition blockPosition) {
+        for (Entity entity : world.a(EntityOcelot.class,
+                new AxisAlignedBB(blockPosition.getX(), blockPosition.getY() + 1,
+                        blockPosition.getZ(), blockPosition.getX() + 1, blockPosition.getY() + 2,
+                        blockPosition.getZ() + 1))) {
+            EntityOcelot entityOcelot = (EntityOcelot) entity;
+            if (entityOcelot.isSitting()) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    @Override
+    public boolean activateContainer(final Player bukkitPlayer, final boolean silentchest,
+            final org.bukkit.block.Block bukkitBlock) {
+
+        // Silent ender chest is API-only
+        if (silentchest && bukkitBlock.getType() == Material.ENDER_CHEST) {
+            bukkitPlayer.openInventory(bukkitPlayer.getEnderChest());
+            bukkitPlayer.incrementStatistic(Statistic.ENDERCHEST_OPENED);
+            return true;
+        }
+
+        EntityPlayer player = com.lishid.openinv.internal.v1_13_R1.PlayerDataManager.getHandle(bukkitPlayer);
+
+        final World world = player.world;
+        final BlockPosition blockPosition = new BlockPosition(bukkitBlock.getX(), bukkitBlock.getY(), bukkitBlock.getZ());
+        final Object tile = world.getTileEntity(blockPosition);
+
+        if (tile == null) {
+            return false;
+        }
+
+        if (tile instanceof TileEntityEnderChest) {
+            // Anychest ender chest. See net.minecraft.server.BlockEnderChest
+            InventoryEnderChest enderChest = player.getEnderChest();
+            enderChest.a((TileEntityEnderChest) tile);
+            player.openContainer(enderChest);
+            bukkitPlayer.incrementStatistic(Statistic.ENDERCHEST_OPENED);
+            return true;
+        }
+
+        if (!(tile instanceof ITileInventory)) {
+            return false;
+        }
+
+        ITileInventory tileInventory = (ITileInventory) tile;
+        Block block = world.getType(blockPosition).getBlock();
+
+        if (block instanceof BlockChest) {
+            for (EnumDirection localEnumDirection : EnumDirection.EnumDirectionLimit.HORIZONTAL) {
+                BlockPosition localBlockPosition = blockPosition.shift(localEnumDirection);
+                Block localBlock = world.getType(localBlockPosition).getBlock();
+
+                if (localBlock != block) {
+                    continue;
+                }
+
+                TileEntity localTileEntity = world.getTileEntity(localBlockPosition);
+                if (!(localTileEntity instanceof TileEntityChest)) {
+                    continue;
+                }
+
+                if (localEnumDirection == EnumDirection.WEST
+                        || localEnumDirection == EnumDirection.NORTH) {
+                    tileInventory = new InventoryLargeChest(new ChatMessage("container.chestDouble"),
+                            (TileEntityChest) localTileEntity, tileInventory);
+                } else {
+                    tileInventory = new InventoryLargeChest(new ChatMessage("container.chestDouble"),
+                            tileInventory, (TileEntityChest) localTileEntity);
+                }
+                break;
+            }
+
+            if (block instanceof BlockChestTrapped) {
+                bukkitPlayer.incrementStatistic(Statistic.TRAPPED_CHEST_TRIGGERED);
+            } else {
+                bukkitPlayer.incrementStatistic(Statistic.CHEST_OPENED);
+            }
+        }
+
+        if (block instanceof BlockShulkerBox) {
+            bukkitPlayer.incrementStatistic(Statistic.SHULKER_BOX_OPENED);
+        }
+
+        // AnyChest only - SilentChest not active, container unsupported, or unnecessary.
+        if (!silentchest || player.playerInteractManager.getGameMode() == EnumGamemode.SPECTATOR) {
+            player.openContainer(tileInventory);
+            return true;
+        }
+
+        // SilentChest requires access to setting players' gamemode directly.
+        if (this.playerInteractManagerGamemode == null) {
+            return false;
+        }
+
+        EnumGamemode gamemode = player.playerInteractManager.getGameMode();
+        this.forceGameMode(player, EnumGamemode.SPECTATOR);
+        player.openContainer(tileInventory);
+        this.forceGameMode(player, gamemode);
+        return true;
+    }
+
+    @Override
+    public void deactivateContainer(final Player bukkitPlayer) {
+        if (this.playerInteractManagerGamemode == null) {
+            return;
+        }
+
+        InventoryView view = bukkitPlayer.getOpenInventory();
+        switch (view.getType()) {
+        case CHEST:
+        case ENDER_CHEST:
+        case SHULKER_BOX:
+            break;
+        default:
+            return;
+        }
+
+        EntityPlayer player = com.lishid.openinv.internal.v1_13_R1.PlayerDataManager.getHandle(bukkitPlayer);
+
+        EnumGamemode gamemode = player.playerInteractManager.getGameMode();
+        this.forceGameMode(player, EnumGamemode.SPECTATOR);
+        player.activeContainer.b(player);
+        player.activeContainer = player.defaultContainer;
+        this.forceGameMode(player, gamemode);
+    }
+
+    private void forceGameMode(final EntityPlayer player, final EnumGamemode gameMode) {
+        if (this.playerInteractManagerGamemode == null) {
+            // No need to warn repeatedly, error on startup and lack of function should be enough.
+            return;
+        }
+        try {
+            if (!this.playerInteractManagerGamemode.isAccessible()) {
+                // Just in case, ensure accessible.
+                this.playerInteractManagerGamemode.setAccessible(true);
+            }
+            this.playerInteractManagerGamemode.set(player.playerInteractManager, gameMode);
+        } catch (IllegalArgumentException | IllegalAccessException e) {
+            e.printStackTrace();
+        }
+    }
+
+}

internal/v1_13_R1/src/main/java/com/lishid/openinv/internal/v1_13_R1/InventoryAccess.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2011-2018 lishid. All rights reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.lishid.openinv.internal.v1_13_R1;
+
+import com.lishid.openinv.internal.IInventoryAccess;
+import com.lishid.openinv.internal.ISpecialEnderChest;
+import com.lishid.openinv.internal.ISpecialPlayerInventory;
+import com.lishid.openinv.util.InternalAccessor;
+
+import org.bukkit.inventory.Inventory;
+
+import net.minecraft.server.v1_13_R1.IInventory;
+
+import org.bukkit.craftbukkit.v1_13_R1.inventory.CraftInventory;
+
+public class InventoryAccess implements IInventoryAccess {
+
+    @Override
+    public ISpecialEnderChest getSpecialEnderChest(final Inventory inventory) {
+        IInventory inv;
+        if (inventory instanceof CraftInventory) {
+            inv = ((CraftInventory) inventory).getInventory();
+        } else {
+            inv = InternalAccessor.grabFieldOfTypeFromObject(IInventory.class, inventory);
+        }
+
+        if (inv instanceof com.lishid.openinv.internal.v1_13_R1.SpecialEnderChest) {
+            return (com.lishid.openinv.internal.v1_13_R1.SpecialEnderChest) inv;
+        }
+        return null;
+    }
+
+    @Override
+    public ISpecialPlayerInventory getSpecialPlayerInventory(final Inventory inventory) {
+        IInventory inv;
+        if (inventory instanceof CraftInventory) {
+            inv = ((CraftInventory) inventory).getInventory();
+        } else {
+            inv = InternalAccessor.grabFieldOfTypeFromObject(IInventory.class, inventory);
+        }
+
+        if (inv instanceof com.lishid.openinv.internal.v1_13_R1.SpecialPlayerInventory) {
+            return (com.lishid.openinv.internal.v1_13_R1.SpecialPlayerInventory) inv;
+        }
+        return null;
+    }
+
+    @Override
+    public boolean isSpecialEnderChest(final Inventory inventory) {
+        if (inventory instanceof CraftInventory) {
+            return ((CraftInventory) inventory).getInventory() instanceof ISpecialEnderChest;
+        }
+        return InternalAccessor.grabFieldOfTypeFromObject(IInventory.class,
+                inventory) instanceof ISpecialEnderChest;
+    }
+
+    @Override
+    public boolean isSpecialPlayerInventory(final Inventory inventory) {
+        if (inventory instanceof CraftInventory) {
+            return ((CraftInventory) inventory).getInventory() instanceof ISpecialPlayerInventory;
+        }
+        return InternalAccessor.grabFieldOfTypeFromObject(IInventory.class,
+                inventory) instanceof ISpecialPlayerInventory;
+    }
+
+}

internal/v1_13_R1/src/main/java/com/lishid/openinv/internal/v1_13_R1/PlayerDataManager.java

@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2011-2018 lishid. All rights reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.lishid.openinv.internal.v1_13_R1;
+
+import java.util.Collection;
+import java.util.UUID;
+
+import com.lishid.openinv.internal.IPlayerDataManager;
+
+import com.mojang.authlib.GameProfile;
+
+import org.bukkit.Bukkit;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.Server;
+import org.bukkit.entity.Player;
+
+import net.minecraft.server.v1_13_R1.EntityPlayer;
+import net.minecraft.server.v1_13_R1.MinecraftServer;
+import net.minecraft.server.v1_13_R1.PlayerInteractManager;
+
+import org.bukkit.craftbukkit.v1_13_R1.CraftServer;
+import org.bukkit.craftbukkit.v1_13_R1.entity.CraftPlayer;
+
+public class PlayerDataManager implements IPlayerDataManager {
+
+    public static EntityPlayer getHandle(final Player player) {
+        if (player instanceof CraftPlayer) {
+            return ((CraftPlayer) player).getHandle();
+        }
+
+        Server server = player.getServer();
+        EntityPlayer nmsPlayer = null;
+
+        if (server instanceof CraftServer) {
+            nmsPlayer = ((CraftServer) server).getHandle().getPlayer(player.getName());
+        }
+
+        if (nmsPlayer == null) {
+            // Could use reflection to examine fields, but it's honestly not worth the bother.
+            throw new RuntimeException("Unable to fetch EntityPlayer from provided Player implementation");
+        }
+
+        return nmsPlayer;
+    }
+
+    @Override
+    public Collection<? extends Player> getOnlinePlayers() {
+        return Bukkit.getOnlinePlayers();
+    }
+
+    @Override
+    public OfflinePlayer getPlayerByID(final String identifier) {
+        try {
+            UUID uuid = UUID.fromString(identifier);
+            OfflinePlayer player = Bukkit.getOfflinePlayer(uuid);
+            // Ensure player is a real player, otherwise return null
+            if (player == null || !player.hasPlayedBefore() && !player.isOnline()) {
+                return null;
+            }
+            return player;
+        } catch (IllegalArgumentException e) {
+            // Not a UUID
+            return null;
+        }
+    }
+
+    @Override
+    public String getPlayerDataID(final OfflinePlayer offline) {
+        return offline.getUniqueId().toString();
+    }
+
+    @Override
+    public Player loadPlayer(final OfflinePlayer offline) {
+        // Ensure player has data
+        if (offline == null || !offline.hasPlayedBefore()) {
+            return null;
+        }
+
+        // Create a profile and entity to load the player data
+        GameProfile profile = new GameProfile(offline.getUniqueId(), offline.getName());
+        MinecraftServer server = ((CraftServer) Bukkit.getServer()).getServer();
+        EntityPlayer entity = new EntityPlayer(server, server.getWorldServer(0), profile,
+                new PlayerInteractManager(server.getWorldServer(0)));
+
+        // Get the bukkit entity
+        Player target = entity == null ? null : entity.getBukkitEntity();
+        if (target != null) {
+            // Load data
+            target.loadData();
+        }
+        // Return the entity
+        return target;
+    }
+
+}

internal/v1_13_R1/src/main/java/com/lishid/openinv/internal/v1_13_R1/SpecialEnderChest.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2011-2018 lishid. All rights reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.lishid.openinv.internal.v1_13_R1;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.List;
+
+import com.lishid.openinv.internal.ISpecialEnderChest;
+
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.Inventory;
+
+import net.minecraft.server.v1_13_R1.EntityPlayer;
+import net.minecraft.server.v1_13_R1.IInventory;
+import net.minecraft.server.v1_13_R1.InventoryEnderChest;
+import net.minecraft.server.v1_13_R1.InventorySubcontainer;
+import net.minecraft.server.v1_13_R1.ItemStack;
+
+import org.bukkit.craftbukkit.v1_13_R1.inventory.CraftInventory;
+
+public class SpecialEnderChest extends InventorySubcontainer
+        implements IInventory, ISpecialEnderChest {
+
+    private final InventoryEnderChest enderChest;
+    private final CraftInventory inventory = new CraftInventory(this);
+    private boolean playerOnline;
+
+    public SpecialEnderChest(final Player player, final Boolean online) {
+        super(PlayerDataManager.getHandle(player).getEnderChest().getDisplayName(),
+                PlayerDataManager.getHandle(player).getEnderChest().getSize(), player);
+        this.playerOnline = online;
+        this.enderChest = PlayerDataManager.getHandle(player).getEnderChest();
+        this.setItemLists(this, this.enderChest.getContents());
+    }
+
+    @Override
+    public Inventory getBukkitInventory() {
+        return this.inventory;
+    }
+
+    @Override
+    public boolean isInUse() {
+        return !this.getViewers().isEmpty();
+    }
+
+    private void setItemLists(final InventorySubcontainer subcontainer, final List<ItemStack> list) {
+        try {
+            // Prepare to remove final modifier
+            Field modifiers = Field.class.getDeclaredField("modifiers");
+            modifiers.setAccessible(true);
+            // Access and replace main inventory array
+            Field field = InventorySubcontainer.class.getField("items");
+            modifiers.setInt(field, field.getModifiers() & ~Modifier.FINAL);
+            field.set(subcontainer, list);
+        } catch (NoSuchFieldException | SecurityException | IllegalArgumentException
+                | IllegalAccessException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void setPlayerOffline() {
+        this.playerOnline = false;
+    }
+
+    @Override
+    public void setPlayerOnline(final Player player) {
+        if (!this.playerOnline) {
+            try {
+                EntityPlayer nmsPlayer = PlayerDataManager.getHandle(player);
+                this.bukkitOwner = nmsPlayer.getBukkitEntity();
+                this.setItemLists(nmsPlayer.getEnderChest(), this.items);
+            } catch (Exception e) {}
+            this.playerOnline = true;
+        }
+    }
+
+    @Override
+    public void update() {
+        super.update();
+        this.enderChest.update();
+    }
+
+}

internal/v1_13_R1/src/main/java/com/lishid/openinv/internal/v1_13_R1/SpecialPlayerInventory.java

@@ -0,0 +1,258 @@
+/*
+ * Copyright (C) 2011-2018 lishid. All rights reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.lishid.openinv.internal.v1_13_R1;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.Arrays;
+
+import com.lishid.openinv.internal.ISpecialPlayerInventory;
+
+import net.minecraft.server.v1_13_R1.ChatMessage;
+import net.minecraft.server.v1_13_R1.IChatBaseComponent;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.Inventory;
+
+import net.minecraft.server.v1_13_R1.ContainerUtil;
+import net.minecraft.server.v1_13_R1.EntityHuman;
+import net.minecraft.server.v1_13_R1.ItemStack;
+import net.minecraft.server.v1_13_R1.NonNullList;
+import net.minecraft.server.v1_13_R1.PlayerInventory;
+
+import org.bukkit.craftbukkit.v1_13_R1.inventory.CraftInventory;
+
+public class SpecialPlayerInventory extends PlayerInventory implements ISpecialPlayerInventory {
+
+    private final CraftInventory inventory = new CraftInventory(this);
+    private boolean playerOnline;
+
+    public SpecialPlayerInventory(final Player bukkitPlayer, final Boolean online) {
+        super(PlayerDataManager.getHandle(bukkitPlayer));
+        this.playerOnline = online;
+        this.setItemArrays(this, this.player.inventory.items, this.player.inventory.armor,
+                this.player.inventory.extraSlots);
+    }
+
+    @Override
+    public boolean a(final EntityHuman entityhuman) {
+        return true;
+    }
+
+    @Override
+    public Inventory getBukkitInventory() {
+        return this.inventory;
+    }
+
+    @Override
+    public ItemStack getItem(int i) {
+        NonNullList<ItemStack> list = this.items;
+
+        if (i >= list.size()) {
+            i -= list.size();
+            list = this.armor;
+        } else {
+            i = this.getReversedItemSlotNum(i);
+        }
+
+        if (i >= list.size()) {
+            i -= list.size();
+            list = this.extraSlots;
+        } else if (list == this.armor) {
+            i = this.getReversedArmorSlotNum(i);
+        }
+
+        if (i >= list.size()) {
+            return ItemStack.a;
+        }
+
+        return list.get(i);
+    }
+
+    @Override
+    public IChatBaseComponent getDisplayName() {
+        return new ChatMessage(this.player.getName());
+    }
+
+    @Override
+    public boolean hasCustomName() {
+        return true;
+    }
+
+    private int getReversedArmorSlotNum(final int i) {
+        if (i == 0) {
+            return 3;
+        }
+        if (i == 1) {
+            return 2;
+        }
+        if (i == 2) {
+            return 1;
+        }
+        if (i == 3) {
+            return 0;
+        }
+        return i;
+    }
+
+    private int getReversedItemSlotNum(final int i) {
+        if (i >= 27) {
+            return i - 27;
+        }
+        return i + 9;
+    }
+
+    @Override
+    public int getSize() {
+        return super.getSize() + 4;
+    }
+
+    @Override
+    public boolean isInUse() {
+        return !this.getViewers().isEmpty();
+    }
+
+    @Override
+    public void setItem(int i, final ItemStack itemstack) {
+        NonNullList<ItemStack> list = this.items;
+
+        if (i >= list.size()) {
+            i -= list.size();
+            list = this.armor;
+        } else {
+            i = this.getReversedItemSlotNum(i);
+        }
+
+        if (i >= list.size()) {
+            i -= list.size();
+            list = this.extraSlots;
+        } else if (list == this.armor) {
+            i = this.getReversedArmorSlotNum(i);
+        }
+
+        if (i >= list.size()) {
+            this.player.drop(itemstack, true);
+            return;
+        }
+
+        list.set(i, itemstack);
+    }
+
+    private void setItemArrays(final PlayerInventory inventory, final NonNullList<ItemStack> items,
+            final NonNullList<ItemStack> armor, final NonNullList<ItemStack> extraSlots) {
+        try {
+            // Prepare to remove final modifier
+            Field modifiers = Field.class.getDeclaredField("modifiers");
+            modifiers.setAccessible(true);
+
+            // Access and replace main inventory list
+            Field field = PlayerInventory.class.getField("items");
+            modifiers.setInt(field, field.getModifiers() & ~Modifier.FINAL);
+            field.set(inventory, items);
+
+            // Access and replace armor inventory list
+            field = PlayerInventory.class.getField("armor");
+            modifiers.setInt(field, field.getModifiers() & ~Modifier.FINAL);
+            field.set(inventory, armor);
+
+            // Access and replace offhand inventory list
+            field = PlayerInventory.class.getField("extraSlots");
+            modifiers.setInt(field, field.getModifiers() & ~Modifier.FINAL);
+            field.set(inventory, extraSlots);
+
+            // Access and replace list containing all inventory lists
+            field = PlayerInventory.class.getDeclaredField("f");
+            field.setAccessible(true);
+            modifiers.setInt(field, field.getModifiers() & ~Modifier.FINAL);
+            field.set(inventory, Arrays.asList(items, armor, extraSlots));
+        } catch (NoSuchFieldException | IllegalArgumentException | IllegalAccessException e) {
+            // Unable to set final fields to item lists, we're screwed. Noisily fail.
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void setPlayerOffline() {
+        this.playerOnline = false;
+    }
+
+    @Override
+    public void setPlayerOnline(final Player player) {
+        if (!this.playerOnline) {
+            this.player = PlayerDataManager.getHandle(player);
+            this.setItemArrays(this.player.inventory, this.items, this.armor, this.extraSlots);
+            this.playerOnline = true;
+        }
+    }
+
+    @Override
+    public ItemStack splitStack(int i, final int j) {
+        NonNullList<ItemStack> list = this.items;
+
+        if (i >= list.size()) {
+            i -= list.size();
+            list = this.armor;
+        } else {
+            i = this.getReversedItemSlotNum(i);
+        }
+
+        if (i >= list.size()) {
+            i -= list.size();
+            list = this.extraSlots;
+        } else if (list == this.armor) {
+            i = this.getReversedArmorSlotNum(i);
+        }
+
+        if (i >= list.size()) {
+            return ItemStack.a;
+        }
+
+        return list.get(i).isEmpty() ? ItemStack.a : ContainerUtil.a(list, i, j);
+    }
+
+    @Override
+    public ItemStack splitWithoutUpdate(int i) {
+        NonNullList<ItemStack> list = this.items;
+
+        if (i >= list.size()) {
+            i -= list.size();
+            list = this.armor;
+        } else {
+            i = this.getReversedItemSlotNum(i);
+        }
+
+        if (i >= list.size()) {
+            i -= list.size();
+            list = this.extraSlots;
+        } else if (list == this.armor) {
+            i = this.getReversedArmorSlotNum(i);
+        }
+
+        if (i >= list.size()) {
+            return ItemStack.a;
+        }
+
+        if (!list.get(i).isEmpty()) {
+            ItemStack itemstack = list.get(i);
+
+            list.set(i, ItemStack.a);
+            return itemstack;
+        }
+
+        return ItemStack.a;
+    }
+
+}