if (k == 0 || k == 1) { //if left or right click
int stackSize = 64;
if (k == 1) { //if right click
stackSize = 1;
}
Slot cslot = super.getSlotAtCoords(i, j);
if (cslot!=null) { //if they actually clicked a slot
ItemStack slotstack = cslot.getStack();
ItemStack pstack = mc.thePlayer.inventory.getItemStack();
if (slotstack!=null) { //if there is an item in that slot
if(pstack==null) { //if the player is not holding an item with the cursor
if (cslot.slotNumber>=72&&cslot.slotNumber<=80) { //hotbar slots
stackSize = slotstack.stackSize;
}
ItemStack newstack = new ItemStack(slotstack.itemID, stackSize, slotstack.getItemDamage());
mc.thePlayer.inventory.setItemStack(newstack);
if (cslot.slotNumber>=72&&cslot.slotNumber<=80) { //hotbar slots
cslot.putStack(null);
}
} else { //if the player is holding an item with the cursor
if (cslot.slotNumber>=72&&cslot.slotNumber<=80) { //hotbar slots
mc.thePlayer.inventory.setItemStack(slotstack); //switch the held item with the slot item
cslot.putStack(pstack);
//if they're the same item type and they're stackable and the slot stack isn't already full
if (pstack.isItemEqual(cslot.getStack())&&pstack.isStackable()&&cslot.getStack().stackSize<64) {
ItemStack cstack = cslot.getStack();
if (k == 0) { //if left click
while (cslot.getStack().stackSize<64&&pstack.stackSize>=1) {
pstack.stackSize-=1;
cslot.putStack(new ItemStack(cstack.itemID, cstack.stackSize+1, cstack.getItemDamage()));
}
} else { //if right click
pstack.stackSize-=1;
cslot.putStack(new ItemStack(cstack.itemID, cstack.stackSize+1, cstack.getItemDamage()));
}
if (pstack.stackSize==0) {
mc.thePlayer.inventory.setItemStack(null);
}
}
} else {
mc.thePlayer.inventory.setItemStack(null);
}
}
} else { //if there is not an item in that slot
if (pstack!=null) { //if the player is holding an item with the cursor
if (cslot.slotNumber>=72&&cslot.slotNumber<=80) { //if clicked in hotbar slots
if (k == 0) { //if left click
cslot.putStack(pstack);
mc.thePlayer.inventory.setItemStack(null);
} else { //if right click
cslot.putStack(new ItemStack(pstack.itemID, 1, pstack.getItemDamage()));
mc.thePlayer.inventory.setItemStack(new ItemStack(pstack.itemID, pstack.stackSize-1, pstack.getItemDamage()));
}
} else { //if clicked in item selection area
mc.thePlayer.inventory.setItemStack(null);
}
}
}
}
}
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