Paper/nms-patches/TileEntityBrewingStand.patch

--- a/net/minecraft/server/TileEntityBrewingStand.java
+++ b/net/minecraft/server/TileEntityBrewingStand.java
@@ -3,6 +3,15 @@
 import java.util.Arrays;
 import java.util.Iterator;
 
+// 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;
+// CraftBukkit end
+
 public class TileEntityBrewingStand extends TileEntityContainer implements ITickable, IWorldInventory {
 
     private static final int[] a = new int[] { 3};
@@ -14,6 +23,31 @@
     private Item k;
     private String l;
     private int m;
+    // 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;
+    }
+
+    public void setMaxStackSize(int size) {
+        maxStack = size;
+    }
+    // CraftBukkit end
 
     public TileEntityBrewingStand() {
         this.items = NonNullList.a(5, ItemStack.a);
@@ -55,8 +89,19 @@
         ItemStack itemstack = (ItemStack) this.items.get(4);
 
         if (this.m <= 0 && itemstack.getItem() == Items.BLAZE_POWDER) {
-            this.m = 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.m = event.getFuelPower(); // PAIL fuelLevel
+            if (this.m > 0 && event.isConsuming()) {
+                itemstack.subtract(1);
+            }
+            // CraftBukkit end
             this.update();
         }
 
@@ -64,9 +109,14 @@
         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.p();
@@ -140,6 +190,15 @@
 
     private void p() {
         ItemStack itemstack = (ItemStack) this.items.get(3);
+        // CraftBukkit start
+        if (getOwner() != null) {
+            BrewEvent event = new BrewEvent(world.getWorld().getBlockAt(position.getX(), position.getY(), position.getZ()), (org.bukkit.inventory.BrewerInventory) this.getOwner().getInventory(), this.m);
+            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)));
@@ -210,7 +269,7 @@
     }
 
     public int getMaxStackSize() {
-        return 64;
+        return this.maxStack; // CraftBukkit
     }
 
     public boolean a(EntityHuman entityhuman) {
@@ -227,7 +286,7 @@
         } else {
             Item item = itemstack.getItem();
 
-            return i == 4 ? item == Items.BLAZE_POWDER : (item == Items.POTION || item == Items.SPLASH_POTION || item == Items.LINGERING_POTION || item == Items.GLASS_BOTTLE) && this.getItem(i) == ItemStack.a;
+            return i == 4 ? item == Items.BLAZE_POWDER : (item == Items.POTION || item == Items.SPLASH_POTION || item == Items.LINGERING_POTION || item == Items.GLASS_BOTTLE) && this.getItem(i).isEmpty(); // CraftBukkit - MC-111753
         }
     }