make ItemSlots copy-able

src/main/java/appeng/util/inv/ItemHandlerIterator.java

@@ -55,6 +55,8 @@ class ItemHandlerIterator implements Iterator<ItemSlot>
 		this.itemSlot.setExtractable( !this.itemHandler.extractItem( this.slot, 1, true ).isEmpty() );
 		this.itemSlot.setItemStack( this.itemHandler.getStackInSlot( this.slot ) );
 		this.itemSlot.setSlot( this.slot );
+		this.itemSlot.setSlotLimit( this.itemHandler.getSlotLimit( this.slot ) );
+		this.itemSlot.setItemHandler( this.itemHandler );
 		this.slot++;
 		return this.itemSlot;
 	}

src/main/java/appeng/util/inv/ItemSlot.java

@@ -23,6 +23,7 @@ import net.minecraft.item.ItemStack;
 
 import appeng.api.storage.data.IAEItemStack;
 import appeng.util.item.AEItemStack;
+import net.minecraftforge.items.IItemHandler;
 
 
 public class ItemSlot
@@ -34,6 +35,25 @@ public class ItemSlot
 	private IAEItemStack aeItemStack;
 	private ItemStack itemStack;
 
+	public void setItemHandler( IItemHandler itemHandler )
+	{
+		this.itemHandler = itemHandler;
+	}
+
+	private IItemHandler itemHandler;
+
+	public int getSlotLimit()
+	{
+		return slotLimit;
+	}
+
+	public void setSlotLimit( int slotLimit )
+	{
+		this.slotLimit = slotLimit;
+	}
+
+	private int slotLimit;
+
 	public ItemStack getItemStack()
 	{
 		return this.itemStack
@@ -77,4 +97,19 @@ public class ItemSlot
 	{
 		this.slot = slot;
 	}
+
+	public ItemSlot copy()
+	{
+		ItemSlot copy = new ItemSlot();
+		copy.setSlot( this.slot );
+		copy.setSlotLimit( this.slotLimit );
+		copy.setItemStack( this.getItemStack() );
+		copy.setExtractable( this.isExtractable );
+		copy.setItemHandler( this.itemHandler );
+		return copy;
+	}
+
+	public ItemStack insertItem( ItemStack sourceItemStack){
+		return this.itemHandler.insertItem( this.slot, sourceItemStack , true );
+	}
 }