/** merges provided ItemStack with the first avaliable one in the container/player inventory */
protected boolean mergeItemStack(ItemStack par1ItemStack, int par2, int par3, boolean par4) {
boolean var5 = false;
int var6 = par2;
if (par4) {
var6 = par3 - 1;
}
Slot var7;
ItemStack var8;
if (par1ItemStack.isStackable()) {
while (par1ItemStack.stackSize > 0 && (!par4 && var6 < par3 || par4 && var6 >= par2)) {
var7 = (Slot) this.inventorySlots.get(var6);
var8 = var7.getStack();
if (var8 != null
&& var8.itemID == par1ItemStack.itemID
&& (!par1ItemStack.getHasSubtypes()
|| par1ItemStack.getItemDamage() == var8.getItemDamage())
&& ItemStack.func_77970_a(par1ItemStack, var8)) {
int var9 = var8.stackSize + par1ItemStack.stackSize;
if (var9 <= par1ItemStack.getMaxStackSize()) {
par1ItemStack.stackSize = 0;
var8.stackSize = var9;
var7.onSlotChanged();
var5 = true;
} else if (var8.stackSize < par1ItemStack.getMaxStackSize()) {
par1ItemStack.stackSize -= par1ItemStack.getMaxStackSize() - var8.stackSize;
var8.stackSize = par1ItemStack.getMaxStackSize();
var7.onSlotChanged();
var5 = true;
}
}
if (par4) {
--var6;
} else {
++var6;
}
}
}
if (par1ItemStack.stackSize > 0) {
if (par4) {
var6 = par3 - 1;
} else {
var6 = par2;
}
while (!par4 && var6 < par3 || par4 && var6 >= par2) {
var7 = (Slot) this.inventorySlots.get(var6);
var8 = var7.getStack();
if (var8 == null) {
var7.putStack(par1ItemStack.copy());
var7.onSlotChanged();
par1ItemStack.stackSize = 0;
var5 = true;
break;
}
if (par4) {
--var6;
} else {
++var6;
}
}
}
return var5;
}
public ItemStack slotClick(int par1, int par2, boolean par3, EntityPlayer par4EntityPlayer) {
ItemStack var5 = null;
if (par2 > 1) {
return null;
} else {
if (par2 == 0 || par2 == 1) {
InventoryPlayer var6 = par4EntityPlayer.inventory;
if (par1 == -999) {
if (var6.getItemStack() != null && par1 == -999) {
if (par2 == 0) {
par4EntityPlayer.dropPlayerItem(var6.getItemStack());
var6.setItemStack((ItemStack) null);
}
if (par2 == 1) {
par4EntityPlayer.dropPlayerItem(var6.getItemStack().splitStack(1));
if (var6.getItemStack().stackSize == 0) {
var6.setItemStack((ItemStack) null);
}
}
}
} else if (par3) {
ItemStack var7 = this.transferStackInSlot(par1);
if (var7 != null) {
int var8 = var7.itemID;
var5 = var7.copy();
Slot var9 = (Slot) this.inventorySlots.get(par1);
if (var9 != null && var9.getStack() != null && var9.getStack().itemID == var8) {
this.retrySlotClick(par1, par2, par3, par4EntityPlayer);
}
}
} else {
if (par1 < 0) {
return null;
}
Slot var12 = (Slot) this.inventorySlots.get(par1);
if (var12 != null) {
ItemStack var13 = var12.getStack();
ItemStack var14 = var6.getItemStack();
if (var13 != null) {
var5 = var13.copy();
}
int var10;
if (var13 == null) {
if (var14 != null && var12.isItemValid(var14)) {
var10 = par2 == 0 ? var14.stackSize : 1;
if (var10 > var12.getSlotStackLimit()) {
var10 = var12.getSlotStackLimit();
}
var12.putStack(var14.splitStack(var10));
if (var14.stackSize == 0) {
var6.setItemStack((ItemStack) null);
}
}
} else if (var14 == null) {
var10 = par2 == 0 ? var13.stackSize : (var13.stackSize + 1) / 2;
ItemStack var11 = var12.decrStackSize(var10);
var6.setItemStack(var11);
if (var13.stackSize == 0) {
var12.putStack((ItemStack) null);
}
var12.onPickupFromSlot(var6.getItemStack());
} else if (var12.isItemValid(var14)) {
if (var13.itemID == var14.itemID
&& (!var13.getHasSubtypes() || var13.getItemDamage() == var14.getItemDamage())
&& ItemStack.func_77970_a(var13, var14)) {
var10 = par2 == 0 ? var14.stackSize : 1;
if (var10 > var12.getSlotStackLimit() - var13.stackSize) {
var10 = var12.getSlotStackLimit() - var13.stackSize;
}
if (var10 > var14.getMaxStackSize() - var13.stackSize) {
var10 = var14.getMaxStackSize() - var13.stackSize;
}
var14.splitStack(var10);
if (var14.stackSize == 0) {
var6.setItemStack((ItemStack) null);
}
var13.stackSize += var10;
} else if (var14.stackSize <= var12.getSlotStackLimit()) {
var12.putStack(var14);
var6.setItemStack(var13);
}
} else if (var13.itemID == var14.itemID
&& var14.getMaxStackSize() > 1
&& (!var13.getHasSubtypes() || var13.getItemDamage() == var14.getItemDamage())
&& ItemStack.func_77970_a(var13, var14)) {
var10 = var13.stackSize;
if (var10 > 0 && var10 + var14.stackSize <= var14.getMaxStackSize()) {
var14.stackSize += var10;
var13 = var12.decrStackSize(var10);
if (var13.stackSize == 0) {
var12.putStack((ItemStack) null);
}
var12.onPickupFromSlot(var6.getItemStack());
}
}
var12.onSlotChanged();
}
}
}
return var5;
}
}
