content: package net.minecraft.inventory;
  
  import net.minecraft.entity.player.EntityPlayer;
  import net.minecraft.entity.player.InventoryPlayer;
  import net.minecraft.init.Items;
  import net.minecraft.item.ItemStack;
  import net.minecraft.stats.AchievementList;
  
  public class ContainerBrewingStand extends Container {
      public final IInventory tileBrewingStand;
      private final Slot theSlot;
      private int brewTime;
  
      public ContainerBrewingStand(InventoryPlayer playerInventory, IInventory tileBrewingStandIn) {
          this.tileBrewingStand = tileBrewingStandIn;
          this.addSlotToContainer(new ContainerBrewingStand.Potion(playerInventory.player, tileBrewingStandIn, 0, 56, 46));
          this.addSlotToContainer(new ContainerBrewingStand.Potion(playerInventory.player, tileBrewingStandIn, 1, 79, 53));
          this.addSlotToContainer(new ContainerBrewingStand.Potion(playerInventory.player, tileBrewingStandIn, 2, 102, 46));
          this.theSlot = this.addSlotToContainer(new ContainerBrewingStand.Ingredient(tileBrewingStandIn, 3, 79, 17));
  
          for (int i = 0; i < 3; ++i) {
              for (int j = 0; j < 9; ++j) {
                  this.addSlotToContainer(new Slot(playerInventory, j + i * 9 + 9, 8 + j * 18, 84 + i * 18));
              }
          }
  
          for (int k = 0; k < 9; ++k) {
              this.addSlotToContainer(new Slot(playerInventory, k, 8 + k * 18, 142));
          }
      }
  
      public void onCraftGuiOpened(ICrafting listener) {
          super.onCraftGuiOpened(listener);
          listener.sendAllWindowProperties(this, this.tileBrewingStand);
      }
  
      public void detectAndSendChanges() {
          super.detectAndSendChanges();
  
          for (int i = 0; i < this.crafters.size(); ++i) {
              ICrafting icrafting = this.crafters.get(i);
  
              if (this.brewTime != this.tileBrewingStand.getField(0)) {
                  icrafting.sendProgressBarUpdate(this, 0, this.tileBrewingStand.getField(0));
              }
          }
  
          this.brewTime = this.tileBrewingStand.getField(0);
      }
  
      public void updateProgressBar(int id, int data) {
          this.tileBrewingStand.setField(id, data);
      }
  
      public boolean canInteractWith(EntityPlayer playerIn) {
          return this.tileBrewingStand.isUseableByPlayer(playerIn);
      }
  
      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 < 0 || index > 2) && index != 3) {
                  if (!this.theSlot.getHasStack() && this.theSlot.isItemValid(itemstack1)) {
                      if (!this.mergeItemStack(itemstack1, 3, 4, false)) {
                          return null;
                      }
                  } else if (ContainerBrewingStand.Potion.canHoldPotion(itemstack)) {
                      if (!this.mergeItemStack(itemstack1, 0, 3, false)) {
                          return null;
                      }
                  } else if (index >= 4 && index < 31) {
                      if (!this.mergeItemStack(itemstack1, 31, 40, false)) {
                          return null;
                      }
                  } else if (index >= 31 && index < 40) {
                      if (!this.mergeItemStack(itemstack1, 4, 31, false)) {
                          return null;
                      }
                  } else if (!this.mergeItemStack(itemstack1, 4, 40, false)) {
                      return null;
                  }
              } else {
                  if (!this.mergeItemStack(itemstack1, 4, 40, true)) {
                      return null;
                  }
  
                  slot.onSlotChange(itemstack1, itemstack);
              }
  
              if (itemstack1.stackSize == 0) {
                  slot.putStack(null);
              } else {
                  slot.onSlotChanged();
              }
  
              if (itemstack1.stackSize == itemstack.stackSize) {
                  return null;
              }
  
              slot.onPickupFromSlot(playerIn, itemstack1);
          }
  
          return itemstack;
      }
  
      class Ingredient extends Slot {
          public Ingredient(IInventory inventoryIn, int index, int xPosition, int yPosition) {
              super(inventoryIn, index, xPosition, yPosition);
          }
  
          public boolean isItemValid(ItemStack stack) {
              return stack != null && stack.getItem().isPotionIngredient(stack);
          }
  
          public int getSlotStackLimit() {
              return 64;
          }
      }
  
      static class Potion extends Slot {
          private final EntityPlayer player;
  
          public Potion(EntityPlayer playerIn, IInventory inventoryIn, int index, int xPosition, int yPosition) {
              super(inventoryIn, index, xPosition, yPosition);
              this.player = playerIn;
          }
  
          public boolean isItemValid(ItemStack stack) {
              return canHoldPotion(stack);
          }
  
          public int getSlotStackLimit() {
              return 1;
          }
  
          public void onPickupFromSlot(EntityPlayer playerIn, ItemStack stack) {
              if (stack.getItem() == Items.potionitem && stack.getMetadata() > 0) {
                  this.player.triggerAchievement(AchievementList.potion);
              }
  
              super.onPickupFromSlot(playerIn, stack);
          }
  
          public static boolean canHoldPotion(ItemStack stack) {
              return stack != null && (stack.getItem() == Items.potionitem || stack.getItem() == Items.glass_bottle);
          }
      }
  }
  