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Merge pull request #638 from P3pp3rF1y/1.20.x-dev
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| package reliquary.util; | ||
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| import net.minecraft.world.item.ItemStack; | ||
| import net.minecraftforge.items.IItemHandler; | ||
| import net.minecraftforge.items.wrapper.EmptyHandler; | ||
| import org.jetbrains.annotations.NotNull; | ||
|
|
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| // combines multiple IItemHandler into one interface | ||
| public class CombinedItemHandler implements IItemHandler { | ||
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| protected final IItemHandler[] itemHandler; // the handlers | ||
| protected final int[] baseIndex; // index-offsets of the different handlers | ||
| protected final int slotCount; // number of total slots | ||
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| public CombinedItemHandler(IItemHandler... itemHandler) { | ||
| this.itemHandler = itemHandler; | ||
| baseIndex = new int[itemHandler.length]; | ||
| int index = 0; | ||
| for (int i = 0; i < itemHandler.length; i++) { | ||
| index += itemHandler[i].getSlots(); | ||
| baseIndex[i] = index; | ||
| } | ||
| slotCount = index; | ||
| } | ||
|
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| // returns the handler index for the slot | ||
| protected int getIndexForSlot(int slot) { | ||
| if (slot < 0) {return -1;} | ||
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| for (int i = 0; i < baseIndex.length; i++) { | ||
| if (slot - baseIndex[i] < 0) { | ||
| return i; | ||
| } | ||
| } | ||
| return -1; | ||
| } | ||
|
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| protected IItemHandler getHandlerFromIndex(int index) { | ||
| if (index < 0 || index >= itemHandler.length) { | ||
| return EmptyHandler.INSTANCE; | ||
| } | ||
| return itemHandler[index]; | ||
| } | ||
|
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| protected int getSlotFromIndex(int slot, int index) { | ||
| if (index <= 0 || index >= baseIndex.length) { | ||
| return slot; | ||
| } | ||
| return slot - baseIndex[index - 1]; | ||
| } | ||
|
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| @Override | ||
| public int getSlots() { | ||
| return slotCount; | ||
| } | ||
|
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| @Override | ||
| @NotNull | ||
| public ItemStack getStackInSlot(int slot) { | ||
| int index = getIndexForSlot(slot); | ||
| IItemHandler handler = getHandlerFromIndex(index); | ||
| slot = getSlotFromIndex(slot, index); | ||
| return handler.getStackInSlot(slot); | ||
| } | ||
|
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| @Override | ||
| @NotNull | ||
| public ItemStack insertItem(int slot, @NotNull ItemStack stack, boolean simulate) { | ||
| int index = getIndexForSlot(slot); | ||
| IItemHandler handler = getHandlerFromIndex(index); | ||
| slot = getSlotFromIndex(slot, index); | ||
| return handler.insertItem(slot, stack, simulate); | ||
| } | ||
|
|
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| @Override | ||
| @NotNull | ||
| public ItemStack extractItem(int slot, int amount, boolean simulate) { | ||
| int index = getIndexForSlot(slot); | ||
| IItemHandler handler = getHandlerFromIndex(index); | ||
| slot = getSlotFromIndex(slot, index); | ||
| return handler.extractItem(slot, amount, simulate); | ||
| } | ||
|
|
||
| @Override | ||
| public int getSlotLimit(int slot) { | ||
| int index = getIndexForSlot(slot); | ||
| IItemHandler handler = getHandlerFromIndex(index); | ||
| int localSlot = getSlotFromIndex(slot, index); | ||
| return handler.getSlotLimit(localSlot); | ||
| } | ||
|
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| @Override | ||
| public boolean isItemValid(int slot, @NotNull ItemStack stack) { | ||
| int index = getIndexForSlot(slot); | ||
| IItemHandler handler = getHandlerFromIndex(index); | ||
| int localSlot = getSlotFromIndex(slot, index); | ||
| return handler.isItemValid(localSlot, stack); | ||
| } | ||
| } |