public ItemStack slotClick(int par1, int par2, int par3, EntityPlayer par4EntityPlayer) {
ItemStack var5 = null;
InventoryPlayer var6 = par4EntityPlayer.inventory;
Slot var7;
ItemStack var8;
int var10;
ItemStack var11;
if ((par3 == 0 || par3 == 1) && (par2 == 0 || par2 == 1)) {
if (par1 == -999) {
if (var6.getItemStack() != null && par1 == -999) {
if (par2 == 0) {
par4EntityPlayer.dropPlayerItem(var6.getItemStack());
var6.setItemStack((ItemStack) null);
}
if (par2 == 1) {
// CraftBukkit start - store a reference
ItemStack itemstack3 = var6.getItemStack();
par4EntityPlayer.dropPlayerItem(itemstack3.splitStack(1));
if (itemstack3.stackSize == 0) {
// CraftBukkit end
var6.setItemStack((ItemStack) null);
}
}
}
} else if (par3 == 1) {
var7 = (Slot) this.inventorySlots.get(par1);
if (var7 != null && var7.canTakeStack(par4EntityPlayer)) {
var8 = this.transferStackInSlot(par4EntityPlayer, par1);
if (var8 != null) {
int var12 = var8.itemID;
var5 = var8.copy();
if (var7 != null && var7.getStack() != null && var7.getStack().itemID == var12) {
this.retrySlotClick(par1, par2, true, par4EntityPlayer);
}
}
}
} else {
if (par1 < 0) {
return null;
}
var7 = (Slot) this.inventorySlots.get(par1);
if (var7 != null) {
var8 = var7.getStack();
ItemStack var13 = var6.getItemStack();
if (var8 != null) {
var5 = var8.copy();
}
if (var8 == null) {
if (var13 != null && var7.isItemValid(var13)) {
var10 = par2 == 0 ? var13.stackSize : 1;
if (var10 > var7.getSlotStackLimit()) {
var10 = var7.getSlotStackLimit();
}
if (var13.stackSize >= var10) // CraftBukkit
var7.putStack(var13.splitStack(var10));
if (var13.stackSize == 0) {
var6.setItemStack((ItemStack) null);
}
}
} else if (var7.canTakeStack(par4EntityPlayer)) {
if (var13 == null) {
var10 = par2 == 0 ? var8.stackSize : (var8.stackSize + 1) / 2;
var11 = var7.decrStackSize(var10);
var6.setItemStack(var11);
if (var8.stackSize == 0) {
var7.putStack((ItemStack) null);
}
var7.onPickupFromSlot(par4EntityPlayer, var6.getItemStack());
} else if (var7.isItemValid(var13)) {
if (var8.itemID == var13.itemID
&& var8.getItemDamage() == var13.getItemDamage()
&& ItemStack.areItemStackTagsEqual(var8, var13)) {
var10 = par2 == 0 ? var13.stackSize : 1;
if (var10 > var7.getSlotStackLimit() - var8.stackSize) {
var10 = var7.getSlotStackLimit() - var8.stackSize;
}
if (var10 > var13.getMaxStackSize() - var8.stackSize) {
var10 = var13.getMaxStackSize() - var8.stackSize;
}
var13.splitStack(var10);
if (var13.stackSize == 0) {
var6.setItemStack((ItemStack) null);
}
var8.stackSize += var10;
} else if (var13.stackSize <= var7.getSlotStackLimit()) {
var7.putStack(var13);
var6.setItemStack(var8);
}
} else if (var8.itemID == var13.itemID
&& var13.getMaxStackSize() > 1
&& (!var8.getHasSubtypes() || var8.getItemDamage() == var13.getItemDamage())
&& ItemStack.areItemStackTagsEqual(var8, var13)) {
var10 = var8.stackSize;
if (var10 > 0 && var10 + var13.stackSize <= var13.getMaxStackSize()) {
var13.stackSize += var10;
var8 = var7.decrStackSize(var10);
if (var8.stackSize == 0) {
var7.putStack((ItemStack) null);
}
var7.onPickupFromSlot(par4EntityPlayer, var6.getItemStack());
}
}
}
var7.onSlotChanged();
}
}
} else if (par3 == 2 && par2 >= 0 && par2 < 9) {
var7 = (Slot) this.inventorySlots.get(par1);
if (var7.canTakeStack(par4EntityPlayer)) {
var8 = var6.getStackInSlot(par2);
boolean var9 = var8 == null || var7.inventory == var6 && var7.isItemValid(var8);
var10 = -1;
if (!var9) {
var10 = var6.getFirstEmptyStack();
var9 |= var10 > -1;
}
if (var7.getHasStack() && var9) {
var11 = var7.getStack();
var6.setInventorySlotContents(par2, var11);
if ((var7.inventory != var6 || !var7.isItemValid(var8)) && var8 != null) {
if (var10 > -1) {
var6.addItemStackToInventory(var8);
var7.decrStackSize(var11.stackSize);
var7.putStack((ItemStack) null);
var7.onPickupFromSlot(par4EntityPlayer, var11);
}
} else {
var7.decrStackSize(var11.stackSize);
var7.putStack(var8);
var7.onPickupFromSlot(par4EntityPlayer, var11);
}
} else if (!var7.getHasStack() && var8 != null && var7.isItemValid(var8)) {
var6.setInventorySlotContents(par2, (ItemStack) null);
var7.putStack(var8);
}
}
} else if (par3 == 3
&& par4EntityPlayer.capabilities.isCreativeMode
&& var6.getItemStack() == null
&& par1 >= 0) {
var7 = (Slot) this.inventorySlots.get(par1);
if (var7 != null && var7.getHasStack()) {
var8 = var7.getStack().copy();
var8.stackSize = var8.getMaxStackSize();
var6.setItemStack(var8);
}
}
return var5;
}
@Override
public void setItemInHand(ItemStack stack) {
realInv.setInventorySlotContents(getHeldItemSlot(), BukkitItemStack.createNMSItemStack(stack));
}