SPIGOT-3110: SHULKER_BOX InventoryType

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java

@@ -250,6 +250,13 @@ public class CraftHumanEntity extends CraftLivingEntity implements HumanEntity {
                     openCustomInventory(inventory, player, "minecraft:anvil");
                 }
                 break;
+            case SHULKER_BOX:
+                if (iinventory instanceof TileEntityShulkerBox) {
+                    getHandle().openTileEntity((TileEntityShulkerBox) iinventory);
+                } else {
+                    openCustomInventory(inventory, player, "minecraft:shulker_box");
+                }
+                break;
             case CREATIVE:
             case CRAFTING:
                 throw new IllegalArgumentException("Can't open a " + type + " inventory!");

paper-server/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventory.java

@@ -15,6 +15,7 @@ import net.minecraft.server.TileEntityBrewingStand;
 import net.minecraft.server.TileEntityDispenser;
 import net.minecraft.server.TileEntityDropper;
 import net.minecraft.server.TileEntityFurnace;
+import net.minecraft.server.TileEntityShulkerBox;
 
 import org.apache.commons.lang.Validate;
 import org.bukkit.Location;
@@ -462,6 +463,8 @@ public class CraftInventory implements Inventory {
            return InventoryType.ANVIL;
         } else if (inventory instanceof IHopper) {
             return InventoryType.HOPPER;
+        } else if (inventory instanceof TileEntityShulkerBox) {
+            return InventoryType.SHULKER_BOX;
         } else {
             return InventoryType.CHEST;
         }