SPIGOT-2980: Improve SpawnEgg NBT application and ItemStack conversion.

nms-patches/ItemStack.patch

@@ -20,7 +20,17 @@
  public final class ItemStack {
  
      public static final ItemStack a = new ItemStack((Item) null);
-@@ -46,28 +59,56 @@
+@@ -42,32 +55,68 @@
+         this(item, i, 0);
+     }
+ 
++    // CraftBukkit start
+     public ItemStack(Item item, int i, int j) {
++        this(item, i, j, true);
++    }
++
++    public ItemStack(Item item, int i, int j, boolean convert) {
++        // CraftBukkit end
          this.item = item;
          this.damage = j;
          this.count = i;
@@ -28,7 +38,9 @@
 +        if (MinecraftServer.getServer() != null) {
 +            this.setData(j);
 +        }
-+        this.convertStack();
++        if (convert) {
++            this.convertStack();
++        }
 +        // CraftBukkit end
          if (this.damage < 0) {
 -            this.damage = 0;
@@ -82,7 +94,7 @@
          this.F();
      }
  
-@@ -94,11 +135,138 @@
+@@ -94,11 +143,138 @@
      }
  
      public EnumInteractionResult placeItem(EntityHuman entityhuman, World world, BlockPosition blockposition, EnumHand enumhand, EnumDirection enumdirection, float f, float f1, float f2) {
@@ -222,7 +234,7 @@
  
          return enuminteractionresult;
      }
-@@ -122,7 +290,7 @@
+@@ -122,7 +298,7 @@
          nbttagcompound.setByte("Count", (byte) this.count);
          nbttagcompound.setShort("Damage", (short) this.damage);
          if (this.tag != null) {
@@ -231,7 +243,7 @@
          }
  
          return nbttagcompound;
-@@ -157,11 +325,30 @@
+@@ -157,11 +333,30 @@
      }
  
      public void setData(int i) {
@@ -264,7 +276,7 @@
      }
  
      public int k() {
-@@ -198,6 +385,11 @@
+@@ -198,6 +393,11 @@
              if (this.f()) {
                  if (this.isDamaged(i, entityliving.getRandom())) {
                      entityliving.b(this);
@@ -276,7 +288,16 @@
                      this.subtract(1);
                      if (entityliving instanceof EntityHuman) {
                          EntityHuman entityhuman = (EntityHuman) entityliving;
-@@ -509,6 +701,12 @@
+@@ -239,7 +439,7 @@
+     }
+ 
+     public ItemStack cloneItemStack() {
+-        ItemStack itemstack = new ItemStack(this.item, this.count, this.damage);
++        ItemStack itemstack = new ItemStack(this.item, this.count, this.damage, false); // CraftBukkit
+ 
+         if (this.tag != null) {
+             itemstack.tag = this.tag.g();
+@@ -509,6 +709,12 @@
          nbttaglist.add(nbttagcompound);
      }
  

src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java

@@ -40,9 +40,12 @@ public final class CraftItemStack extends ItemStack {
             return net.minecraft.server.ItemStack.a;
         }
 
-        net.minecraft.server.ItemStack stack = new net.minecraft.server.ItemStack(item, original.getAmount(), original.getDurability());
+        net.minecraft.server.ItemStack stack = new net.minecraft.server.ItemStack(item, original.getAmount(), original.getDurability(), false);
         if (original.hasItemMeta()) {
             setItemMeta(stack, original.getItemMeta());
+        } else {
+            // Converted after setItemMeta
+            stack.convertStack();
         }
         return stack;
     }

src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaSpawnEgg.java

@@ -70,7 +70,7 @@ public class CraftMetaSpawnEgg extends CraftMetaItem implements SpawnEggMeta {
     void applyToItem(NBTTagCompound tag) {
         super.applyToItem(tag);
 
-        if (entityTag == null) {
+        if (!isSpawnEggEmpty() && entityTag == null) {
             entityTag = new NBTTagCompound();
         }
 
@@ -78,7 +78,9 @@ public class CraftMetaSpawnEgg extends CraftMetaItem implements SpawnEggMeta {
             entityTag.setString(ENTITY_ID.NBT, new MinecraftKey(spawnedType.getName()).toString());
         }
 
-        tag.set(ENTITY_TAG.NBT, entityTag);
+        if (entityTag != null) {
+            tag.set(ENTITY_TAG.NBT, entityTag);
+        }
     }
 
     @Override