Paper/Spigot-Server-Patches/0045-Stackable-Buckets.patch

From afb88d4d332f4496e7dafe36d397e4156df10b4d Mon Sep 17 00:00:00 2001
From: Byteflux <byte@byteflux.net>
Date: Mon, 1 Jun 2015 20:45:24 -0700
Subject: [PATCH] Stackable Buckets


diff --git a/src/main/java/net/minecraft/server/ItemBucket.java b/src/main/java/net/minecraft/server/ItemBucket.java
index 4d362ae..b62ea42 100644
--- a/src/main/java/net/minecraft/server/ItemBucket.java
+++ b/src/main/java/net/minecraft/server/ItemBucket.java
@@ -7,6 +7,8 @@ import org.bukkit.event.player.PlayerBucketEmptyEvent;
 import org.bukkit.event.player.PlayerBucketFillEvent;
 // CraftBukkit end
 
+import org.github.paperspigot.PaperSpigotConfig; // PaperSpigot
+
 public class ItemBucket extends Item {
 
     private Block a;
@@ -93,6 +95,18 @@ public class ItemBucket extends Item {
 
                     if (this.a(world, blockposition1) && !entityhuman.abilities.canInstantlyBuild) {
                         entityhuman.b(StatisticList.USE_ITEM_COUNT[Item.getId(this)]);
+                        // PaperSpigot start - Stackable Buckets
+                        if ((this == Items.LAVA_BUCKET && PaperSpigotConfig.stackableLavaBuckets) ||
+                                (this == Items.WATER_BUCKET && PaperSpigotConfig.stackableWaterBuckets)) {
+                            if (--itemstack.count <= 0) {
+                                return CraftItemStack.asNMSCopy(event.getItemStack());
+                            }
+                            if (!entityhuman.inventory.pickup(CraftItemStack.asNMSCopy(event.getItemStack()))) {
+                                entityhuman.drop(CraftItemStack.asNMSCopy(event.getItemStack()), false);
+                            }
+                            return itemstack;
+                        }
+                        // PaperSpigot end
                         return CraftItemStack.asNMSCopy(event.getItemStack()); // CraftBukkit
                     }
                 }
diff --git a/src/main/java/net/minecraft/server/ItemMilkBucket.java b/src/main/java/net/minecraft/server/ItemMilkBucket.java
index 91ea70d..8e3d77e 100644
--- a/src/main/java/net/minecraft/server/ItemMilkBucket.java
+++ b/src/main/java/net/minecraft/server/ItemMilkBucket.java
@@ -1,5 +1,7 @@
 package net.minecraft.server;
 
+import org.github.paperspigot.PaperSpigotConfig; // PaperSpigot
+
 public class ItemMilkBucket extends Item {
 
     public ItemMilkBucket() {
@@ -17,6 +19,15 @@ public class ItemMilkBucket extends Item {
         }
 
         entityhuman.b(StatisticList.USE_ITEM_COUNT[Item.getId(this)]);
+        // PaperSpigot start - Stackable Buckets
+        if (PaperSpigotConfig.stackableMilkBuckets) {
+            if (itemstack.count <= 0) {
+                return new ItemStack(Items.BUCKET);
+            } else if (!entityhuman.inventory.pickup(new ItemStack(Items.BUCKET))) {
+                entityhuman.drop(new ItemStack(Items.BUCKET), false);
+            }
+        }
+        // PaperSpigot end
         return itemstack.count <= 0 ? new ItemStack(Items.BUCKET) : itemstack;
     }
 
diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
index 7ea74c0..18d8d2d 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -62,6 +62,8 @@ import org.bukkit.inventory.InventoryView;
 import org.bukkit.util.NumberConversions;
 // CraftBukkit end
 
+import org.github.paperspigot.PaperSpigotConfig; // PaperSpigot
+
 public class PlayerConnection implements PacketListenerPlayIn, IUpdatePlayerListBox {
 
     private static final Logger c = LogManager.getLogger();
@@ -1634,6 +1636,19 @@ public class PlayerConnection implements PacketListenerPlayIn, IUpdatePlayerList
                         case ALLOW:
                         case DEFAULT:
                             itemstack = this.player.activeContainer.clickItem(packetplayinwindowclick.b(), packetplayinwindowclick.c(), packetplayinwindowclick.f(), this.player);
+                            // PaperSpigot start - Stackable Buckets
+                            if (itemstack != null &&
+                                    ((itemstack.getItem() == Items.LAVA_BUCKET && PaperSpigotConfig.stackableLavaBuckets) ||
+                                            (itemstack.getItem() == Items.WATER_BUCKET && PaperSpigotConfig.stackableWaterBuckets) ||
+                                            (itemstack.getItem() == Items.MILK_BUCKET && PaperSpigotConfig.stackableMilkBuckets))) {
+                                if (action == InventoryAction.MOVE_TO_OTHER_INVENTORY) {
+                                    this.player.updateInventory(this.player.activeContainer);
+                                } else {
+                                    this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(-1, -1, this.player.inventory.getCarried()));
+                                    this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(this.player.activeContainer.windowId, packetplayinwindowclick.b(), this.player.activeContainer.getSlot(packetplayinwindowclick.b()).getItem()));
+                                }
+                            }
+                            // PaperSpigot end
                             break;
                         case DENY:
                             /* Needs enum constructor in InventoryAction
diff --git a/src/main/java/org/github/paperspigot/PaperSpigotConfig.java b/src/main/java/org/github/paperspigot/PaperSpigotConfig.java
index 744773d..31c4cf8 100644
--- a/src/main/java/org/github/paperspigot/PaperSpigotConfig.java
+++ b/src/main/java/org/github/paperspigot/PaperSpigotConfig.java
@@ -3,14 +3,19 @@ package org.github.paperspigot;
 import com.google.common.base.Throwables;
 import java.io.File;
 import java.io.IOException;
+import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.util.*;
 import java.util.logging.Level;
+
+import net.minecraft.server.Item;
+import net.minecraft.server.Items;
 import net.minecraft.server.MinecraftServer;
 import org.apache.commons.lang.StringUtils;
 import org.bukkit.Bukkit;
+import org.bukkit.Material;
 import org.bukkit.command.Command;
 import org.bukkit.configuration.InvalidConfigurationException;
 import org.bukkit.configuration.file.YamlConfiguration;
@@ -168,4 +173,47 @@ public class PaperSpigotConfig
         dataValueAllowedItems = new HashSet<Integer>( getList( "data-value-allowed-items", Collections.emptyList() ) );
         Bukkit.getLogger().info( "Data value allowed items: " + StringUtils.join(dataValueAllowedItems, ", ") );
     }
+
+    public static boolean stackableLavaBuckets;
+    public static boolean stackableWaterBuckets;
+    public static boolean stackableMilkBuckets;
+    private static void stackableBuckets()
+    {
+        stackableLavaBuckets = getBoolean( "stackable-buckets.lava", false );
+        stackableWaterBuckets = getBoolean( "stackable-buckets.water", false );
+        stackableMilkBuckets = getBoolean( "stackable-buckets.milk", false );
+
+        Field maxStack;
+
+        try {
+            maxStack = Material.class.getDeclaredField("maxStack");
+            maxStack.setAccessible(true);
+
+            Field modifiers = Field.class.getDeclaredField("modifiers");
+            modifiers.setAccessible(true);
+            modifiers.setInt(maxStack, maxStack.getModifiers() & ~Modifier.FINAL);
+        } catch (Exception e) {
+            e.printStackTrace();
+            return;
+        }
+
+        try {
+            if (stackableLavaBuckets) {
+                maxStack.set(Material.LAVA_BUCKET, Material.BUCKET.getMaxStackSize());
+                Items.LAVA_BUCKET.c(Material.BUCKET.getMaxStackSize());
+            }
+
+            if (stackableWaterBuckets) {
+                maxStack.set(Material.WATER_BUCKET, Material.BUCKET.getMaxStackSize());
+                Items.WATER_BUCKET.c(Material.BUCKET.getMaxStackSize());
+            }
+
+            if (stackableMilkBuckets) {
+                maxStack.set(Material.MILK_BUCKET, Material.BUCKET.getMaxStackSize());
+                Items.MILK_BUCKET.c(Material.BUCKET.getMaxStackSize());
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
 }
-- 
2.6.0