content: package net.minecraft.inventory;
  
  import net.minecraft.entity.passive.EntityHorse;
  import net.minecraft.entity.player.EntityPlayer;
  import net.minecraft.init.Items;
  import net.minecraft.item.ItemStack;
  
  public class ContainerHorseInventory extends Container {
      private final IInventory horseInventory;
      private final EntityHorse theHorse;
  
      public ContainerHorseInventory(IInventory playerInventory, final IInventory horseInventoryIn, final EntityHorse horse, EntityPlayer player) {
          this.horseInventory = horseInventoryIn;
          this.theHorse = horse;
          int i = 3;
          horseInventoryIn.openInventory(player);
          int j = (i - 4) * 18;
          this.addSlotToContainer(new Slot(horseInventoryIn, 0, 8, 18) {
              public boolean isItemValid(ItemStack stack) {
                  return super.isItemValid(stack) && stack.getItem() == Items.saddle && !this.getHasStack();
              }
          });
          this.addSlotToContainer(new Slot(horseInventoryIn, 1, 8, 36) {
              public boolean isItemValid(ItemStack stack) {
                  return super.isItemValid(stack) && horse.canWearArmor() && EntityHorse.isArmorItem(stack.getItem());
              }
  
              public boolean canBeHovered() {
                  return horse.canWearArmor();
              }
          });
  
          if (horse.isChested()) {
              for (int k = 0; k < i; ++k) {
                  for (int l = 0; l < 5; ++l) {
                      this.addSlotToContainer(new Slot(horseInventoryIn, 2 + l + k * 5, 80 + l * 18, 18 + k * 18));
                  }
              }
          }
  
          for (int i1 = 0; i1 < 3; ++i1) {
              for (int k1 = 0; k1 < 9; ++k1) {
                  this.addSlotToContainer(new Slot(playerInventory, k1 + i1 * 9 + 9, 8 + k1 * 18, 102 + i1 * 18 + j));
              }
          }
  
          for (int j1 = 0; j1 < 9; ++j1) {
              this.addSlotToContainer(new Slot(playerInventory, j1, 8 + j1 * 18, 160 + j));
          }
      }
  
      public boolean canInteractWith(EntityPlayer playerIn) {
          return this.horseInventory.isUseableByPlayer(playerIn) && this.theHorse.isEntityAlive() && this.theHorse.getDistanceToEntity(playerIn) < 8.0F;
      }
  
      public ItemStack transferStackInSlot(EntityPlayer playerIn, int index) {
          ItemStack itemstack = null;
          Slot slot = this.inventorySlots.get(index);
  
          if (slot != null && slot.getHasStack()) {
              ItemStack itemstack1 = slot.getStack();
              itemstack = itemstack1.copy();
  
              if (index < this.horseInventory.getSizeInventory()) {
                  if (!this.mergeItemStack(itemstack1, this.horseInventory.getSizeInventory(), this.inventorySlots.size(), true)) {
                      return null;
                  }
              } else if (this.getSlot(1).isItemValid(itemstack1) && !this.getSlot(1).getHasStack()) {
                  if (!this.mergeItemStack(itemstack1, 1, 2, false)) {
                      return null;
                  }
              } else if (this.getSlot(0).isItemValid(itemstack1)) {
                  if (!this.mergeItemStack(itemstack1, 0, 1, false)) {
                      return null;
                  }
              } else if (this.horseInventory.getSizeInventory() <= 2 || !this.mergeItemStack(itemstack1, 2, this.horseInventory.getSizeInventory(), false)) {
                  return null;
              }
  
              if (itemstack1.stackSize == 0) {
                  slot.putStack(null);
              } else {
                  slot.onSlotChanged();
              }
          }
  
          return itemstack;
      }
  
      public void onContainerClosed(EntityPlayer playerIn) {
          super.onContainerClosed(playerIn);
          this.horseInventory.closeInventory(playerIn);
      }
  }
  