KCauldronX/patches/net/minecraft/block/BlockDropper.java.patch

--- ../src-base/minecraft/net/minecraft/block/BlockDropper.java
+++ ../src-work/minecraft/net/minecraft/block/BlockDropper.java
@@ -13,6 +13,11 @@
 import net.minecraft.tileentity.TileEntityHopper;
 import net.minecraft.util.Facing;
 import net.minecraft.world.World;
+// CraftBukkit start
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.event.inventory.InventoryMoveItemEvent;
+import net.minecraft.inventory.InventoryLargeChest;
+// CraftBukkit end
 
 public class BlockDropper extends BlockDispenser
 {
@@ -38,7 +43,7 @@
         return new TileEntityDropper();
     }
 
-    protected void func_149941_e(World p_149941_1_, int p_149941_2_, int p_149941_3_, int p_149941_4_)
+    public void func_149941_e(World p_149941_1_, int p_149941_2_, int p_149941_3_, int p_149941_4_)   // CraftBukkit - protected -> public
     {
         BlockSourceImpl blocksourceimpl = new BlockSourceImpl(p_149941_1_, p_149941_2_, p_149941_3_, p_149941_4_);
         TileEntityDispenser tileentitydispenser = (TileEntityDispenser)blocksourceimpl.getBlockTileEntity();
@@ -60,13 +65,36 @@
 
                 if (iinventory != null)
                 {
-                    itemstack1 = TileEntityHopper.func_145889_a(iinventory, itemstack.copy().splitStack(1), Facing.oppositeSide[i1]);
+                    // CraftBukkit start - Fire event when pushing items into other inventories
+                    CraftItemStack oitemstack = CraftItemStack.asCraftMirror(itemstack.copy().splitStack(1));
+                    org.bukkit.inventory.Inventory destinationInventory;
 
-                    if (itemstack1 == null)
+                    // Have to special case large chests as they work oddly
+                    if (iinventory instanceof InventoryLargeChest)
                     {
+                        destinationInventory = new org.bukkit.craftbukkit.inventory.CraftInventoryDoubleChest((InventoryLargeChest) iinventory);
+                    }
+                    else
+                    {
+                        destinationInventory = iinventory.getOwner().getInventory();
+                    }
+
+                    InventoryMoveItemEvent event = new InventoryMoveItemEvent(tileentitydispenser.getOwner().getInventory(), oitemstack.clone(), destinationInventory, true);
+                    p_149941_1_.getServer().getPluginManager().callEvent(event);
+
+                    if (event.isCancelled())
+                    {
+                        return;
+                    }
+
+                    itemstack1 = TileEntityHopper.func_145889_a(iinventory, CraftItemStack.asNMSCopy(event.getItem()), Facing.oppositeSide[i1]);
+
+                    if (event.getItem().equals(oitemstack) && itemstack1 == null)
+                    {
+                        // CraftBukkit end
                         itemstack1 = itemstack.copy();
 
-                        if (--itemstack1.stackSize == 0)
+                        if (--itemstack1.stackSize <= 0)
                         {
                             itemstack1 = null;
                         }
@@ -80,7 +108,7 @@
                 {
                     itemstack1 = this.field_149947_P.dispense(blocksourceimpl, itemstack);
 
-                    if (itemstack1 != null && itemstack1.stackSize == 0)
+                    if (itemstack1 != null && itemstack1.stackSize <= 0)
                     {
                         itemstack1 = null;
                     }