Add function to add items with the same behavior as the pumpkin for enderman (#6890)

src/main/java/net/minecraftforge/common/extensions/IForgeItem.java

@@ -28,6 +28,7 @@ import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Multimap;
 
 import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
 import net.minecraft.client.renderer.entity.model.BipedModel;
 import net.minecraft.client.renderer.tileentity.ItemStackTileEntityRenderer;
 import net.minecraft.entity.Entity;
@@ -36,6 +37,7 @@ import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.ai.attributes.Attribute;
 import net.minecraft.entity.ai.attributes.AttributeModifier;
 import net.minecraft.entity.item.ItemEntity;
+import net.minecraft.entity.monster.EndermanEntity;
 import net.minecraft.entity.monster.piglin.PiglinTasks;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ArmorItem;
@@ -814,4 +816,18 @@ public interface IForgeItem
     default <T extends LivingEntity> int damageItem(ItemStack stack, int amount, T entity, Consumer<T> onBroken) {
         return amount;
     }
+
+    /**
+     * Whether this Item can be used to hide player head for enderman.
+     *
+     * @param stack the ItemStack
+     * @param player The player watching the enderman
+     * @param endermanEntity The enderman that the player look
+     * @return true if this Item can be used to hide player head for enderman
+     */
+    default boolean isEnderMask(ItemStack stack, PlayerEntity player, EndermanEntity endermanEntity)
+    {
+        return stack.getItem() == Blocks.CARVED_PUMPKIN.asItem();
+    }
+
 }

src/main/java/net/minecraftforge/common/extensions/IForgeItemStack.java

@@ -23,6 +23,7 @@ import java.util.Set;
 
 import javax.annotation.Nullable;
 
+import net.minecraft.entity.monster.EndermanEntity;
 import net.minecraft.util.CachedBlockInfo;
 import net.minecraft.block.BlockState;
 import net.minecraft.enchantment.Enchantment;
@@ -473,4 +474,16 @@ public interface IForgeItemStack extends ICapabilitySerializable<CompoundNBT>
     {
         return getStack().getItem().makesPiglinsNeutral(getStack(), wearer);
     }
+
+    /**
+     * Whether this Item can be used to hide player head for enderman.
+     *
+     * @param player The player watching the enderman
+     * @param endermanEntity The enderman that the player look
+     * @return true if this Item can be used.
+     */
+    default boolean isEnderMask(PlayerEntity player, EndermanEntity endermanEntity)
+    {
+        return getStack().getItem().isEnderMask(getStack(), player, endermanEntity);
+    }
 }