PaperMC/nms-patches/TileEntityBrewingStand.patch

--- a/net/minecraft/server/TileEntityBrewingStand.java
+++ b/net/minecraft/server/TileEntityBrewingStand.java
@@ -4,6 +4,16 @@
 import java.util.Iterator;
 import javax.annotation.Nullable;
 
+// CraftBukkit start
+import java.util.List;
+import org.bukkit.craftbukkit.entity.CraftHumanEntity;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.entity.HumanEntity;
+import org.bukkit.event.inventory.BrewEvent;
+import org.bukkit.event.inventory.BrewingStandFuelEvent;
+import org.bukkit.inventory.InventoryHolder;
+// CraftBukkit end
+
 public class TileEntityBrewingStand extends TileEntityContainer implements IWorldInventory, ITickable {
 
     private static final int[] b = new int[]{3};
@@ -15,6 +25,36 @@
     private Item k;
     public int fuelLevel;
     protected final IContainerProperties a;
+    // CraftBukkit start - add fields and methods
+    private int lastTick = MinecraftServer.currentTick;
+    public List<HumanEntity> transaction = new java.util.ArrayList<HumanEntity>();
+    private int maxStack = 64;
+
+    public void onOpen(CraftHumanEntity who) {
+        transaction.add(who);
+    }
+
+    public void onClose(CraftHumanEntity who) {
+        transaction.remove(who);
+    }
+
+    public List<HumanEntity> getViewers() {
+        return transaction;
+    }
+
+    public List<ItemStack> getContents() {
+        return this.items;
+    }
+
+    @Override
+    public int getMaxStackSize() {
+        return maxStack;
+    }
+
+    public void setMaxStackSize(int size) {
+        maxStack = size;
+    }
+    // CraftBukkit end
 
     public TileEntityBrewingStand() {
         super(TileEntityTypes.BREWING_STAND);
@@ -83,8 +123,19 @@
         ItemStack itemstack = (ItemStack) this.items.get(4);
 
         if (this.fuelLevel <= 0 && itemstack.getItem() == Items.BLAZE_POWDER) {
-            this.fuelLevel = 20;
-            itemstack.subtract(1);
+            // CraftBukkit start
+            BrewingStandFuelEvent event = new BrewingStandFuelEvent(world.getWorld().getBlockAt(position.getX(), position.getY(), position.getZ()), CraftItemStack.asCraftMirror(itemstack), 20);
+            this.world.getServer().getPluginManager().callEvent(event);
+
+            if (event.isCancelled()) {
+                return;
+            }
+
+            this.fuelLevel = event.getFuelPower();
+            if (this.fuelLevel > 0 && event.isConsuming()) {
+                itemstack.subtract(1);
+            }
+            // CraftBukkit end
             this.update();
         }
 
@@ -92,9 +143,14 @@
         boolean flag1 = this.brewTime > 0;
         ItemStack itemstack1 = (ItemStack) this.items.get(3);
 
+        // CraftBukkit start - Use wall time instead of ticks for brewing
+        int elapsedTicks = MinecraftServer.currentTick - this.lastTick;
+        this.lastTick = MinecraftServer.currentTick;
+
         if (flag1) {
-            --this.brewTime;
-            boolean flag2 = this.brewTime == 0;
+            this.brewTime -= elapsedTicks;
+            boolean flag2 = this.brewTime <= 0; // == -> <=
+            // CraftBukkit end
 
             if (flag2 && flag) {
                 this.j();
@@ -168,6 +224,16 @@
 
     private void j() {
         ItemStack itemstack = (ItemStack) this.items.get(3);
+        // CraftBukkit start
+        InventoryHolder owner = this.getOwner();
+        if (owner != null) {
+            BrewEvent event = new BrewEvent(world.getWorld().getBlockAt(position.getX(), position.getY(), position.getZ()), (org.bukkit.inventory.BrewerInventory) owner.getInventory(), this.fuelLevel);
+            org.bukkit.Bukkit.getPluginManager().callEvent(event);
+            if (event.isCancelled()) {
+                return;
+            }
+        }
+        // CraftBukkit end
 
         for (int i = 0; i < 3; ++i) {
             this.items.set(i, PotionBrewer.d(itemstack, (ItemStack) this.items.get(i)));