Paper/patches/server/1038-Fix-ItemFlags.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sat, 27 Apr 2024 12:16:38 -0700
Subject: [PATCH] Fix ItemFlags

Re-adds missing functionality for HIDE_DESTROYS and
HIDE_PLACED_ON. Also adds new flag in HIDE_STORED_ENCHANTS
which was split from HIDE_ADDITIONAL_TOOLTIP.

== AT ==
public net.minecraft.world.item.AdventureModePredicate predicates

diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaEnchantedBook.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaEnchantedBook.java
index fca0cfba14dd2cc6f24b56eaf269594b2d87fd04..8734f0b777432cd8639094b75a3da1b9595823ed 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaEnchantedBook.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaEnchantedBook.java
@@ -39,7 +39,7 @@ class CraftMetaEnchantedBook extends CraftMetaItem implements EnchantmentStorage
         getOrEmpty(tag, CraftMetaEnchantedBook.STORED_ENCHANTMENTS).ifPresent((itemEnchantments) -> {
             this.enchantments = buildEnchantments(itemEnchantments);
             if (!itemEnchantments.showInTooltip) {
-                this.addItemFlags(ItemFlag.HIDE_ADDITIONAL_TOOLTIP);
+                this.addItemFlags(ItemFlag.HIDE_STORED_ENCHANTS); // Paper - new ItemFlag
             }
         });
     }
@@ -54,7 +54,7 @@ class CraftMetaEnchantedBook extends CraftMetaItem implements EnchantmentStorage
     void applyToItem(CraftMetaItem.Applicator itemTag) {
         super.applyToItem(itemTag);
 
-        this.applyEnchantments(this.enchantments, itemTag, CraftMetaEnchantedBook.STORED_ENCHANTMENTS, ItemFlag.HIDE_ADDITIONAL_TOOLTIP);
+        this.applyEnchantments(this.enchantments, itemTag, CraftMetaEnchantedBook.STORED_ENCHANTMENTS, ItemFlag.HIDE_STORED_ENCHANTS);
     }
 
     @Override
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
index eb9ba1a161f4feade220507a602086bc9d6ce03f..2caa968b3fea322d1cb3210d2dfa7bc844961189 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
@@ -238,6 +238,12 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
     static final ItemMetaKeyType<Unit> HIDE_ADDITIONAL_TOOLTIP = new ItemMetaKeyType(DataComponents.HIDE_ADDITIONAL_TOOLTIP);
     @Specific(Specific.To.NBT)
     static final ItemMetaKeyType<CustomData> CUSTOM_DATA = new ItemMetaKeyType<>(DataComponents.CUSTOM_DATA);
+    // Paper start - fix ItemFlags
+    static final ItemMetaKeyType<net.minecraft.world.item.AdventureModePredicate> CAN_PLACE_ON = new ItemMetaKeyType<>(DataComponents.CAN_PLACE_ON);
+    static final ItemMetaKeyType<net.minecraft.world.item.AdventureModePredicate> CAN_BREAK = new ItemMetaKeyType<>(DataComponents.CAN_BREAK);
+    private List<net.minecraft.advancements.critereon.BlockPredicate> canPlaceOnPredicates;
+    private List<net.minecraft.advancements.critereon.BlockPredicate> canBreakPredicates;
+    // Paper end - fix ItemFlags
 
     // We store the raw original JSON representation of all text data. See SPIGOT-5063, SPIGOT-5656, SPIGOT-5304
     private Component displayName;
@@ -310,6 +316,10 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
         this.customTag = meta.customTag;
 
         this.version = meta.version;
+        // Paper start
+        this.canPlaceOnPredicates = meta.canPlaceOnPredicates;
+        this.canBreakPredicates = meta.canBreakPredicates;
+        // Paper end
     }
 
     CraftMetaItem(DataComponentPatch tag) {
@@ -402,6 +412,20 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
                 this.customTag = null;
             }
         });
+        // Paper start - fix ItemFlags
+        CraftMetaItem.getOrEmpty(tag, CraftMetaItem.CAN_PLACE_ON).ifPresent(data -> {
+            this.canPlaceOnPredicates = List.copyOf(data.predicates);
+            if (!data.showInTooltip()) {
+                this.addItemFlags(ItemFlag.HIDE_PLACED_ON);
+            }
+        });
+        CraftMetaItem.getOrEmpty(tag, CraftMetaItem.CAN_BREAK).ifPresent(data -> {
+            this.canBreakPredicates = List.copyOf(data.predicates);
+            if (!data.showInTooltip()) {
+                this.addItemFlags(ItemFlag.HIDE_DESTROYS);
+            }
+        });
+        // Paper end - fix ItemFlags
 
         Set<Map.Entry<DataComponentType<?>, Optional<?>>> keys = tag.entrySet();
         for (Map.Entry<DataComponentType<?>, Optional<?>> key : keys) {
@@ -583,10 +607,19 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
 
         String unhandled = SerializableMeta.getString(map, "unhandled", true);
         if (unhandled != null) {
-            ByteArrayInputStream buf = new ByteArrayInputStream(Base64.getDecoder().decode(internal));
+            ByteArrayInputStream buf = new ByteArrayInputStream(Base64.getDecoder().decode(unhandled)); // Paper - fix deserializing unhandled tags
             try {
                 CompoundTag unhandledTag = NbtIo.readCompressed(buf, NbtAccounter.unlimitedHeap());
-                this.unhandledTags.copy(DataComponentPatch.CODEC.parse(MinecraftServer.getDefaultRegistryAccess().createSerializationContext(NbtOps.INSTANCE), unhandledTag).result().get());
+                // Paper start
+                final net.minecraft.core.component.DataComponentPatch patch = net.minecraft.core.component.DataComponentPatch.CODEC.parse(net.minecraft.server.MinecraftServer.getDefaultRegistryAccess().createSerializationContext(net.minecraft.nbt.NbtOps.INSTANCE), unhandledTag).result().get();
+                CraftMetaItem.getOrEmpty(patch, CraftMetaItem.CAN_PLACE_ON).ifPresent(data -> {
+                    this.canPlaceOnPredicates = List.copyOf(data.predicates);
+                });
+                CraftMetaItem.getOrEmpty(patch, CraftMetaItem.CAN_BREAK).ifPresent(data -> {
+                    this.canBreakPredicates = List.copyOf(data.predicates);
+                });
+                this.unhandledTags.copy(patch.forget(type -> type == CraftMetaItem.CAN_PLACE_ON.TYPE || type == CraftMetaItem.CAN_BREAK.TYPE));
+                // Paper end
             } catch (IOException ex) {
                 Logger.getLogger(CraftMetaItem.class.getName()).log(Level.SEVERE, null, ex);
             }
@@ -796,6 +829,15 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
             itemTag.put(CraftMetaItem.MAX_DAMAGE, this.maxDamage);
         }
 
+        // Paper start
+        if (this.canPlaceOnPredicates != null && !this.canPlaceOnPredicates.isEmpty()) {
+            itemTag.put(CraftMetaItem.CAN_PLACE_ON, new net.minecraft.world.item.AdventureModePredicate(this.canPlaceOnPredicates, !this.hasItemFlag(ItemFlag.HIDE_PLACED_ON)));
+        }
+        if (this.canBreakPredicates != null && !this.canBreakPredicates.isEmpty()) {
+            itemTag.put(CraftMetaItem.CAN_BREAK, new net.minecraft.world.item.AdventureModePredicate(this.canBreakPredicates, !this.hasItemFlag(ItemFlag.HIDE_DESTROYS)));
+        }
+        // Paper end
+
         for (Map.Entry<DataComponentType<?>, Optional<?>> e : this.unhandledTags.build().entrySet()) {
             e.getValue().ifPresentOrElse((value) -> {
                 itemTag.builder.set((DataComponentType) e.getKey(), value);
@@ -870,7 +912,7 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
 
     @Overridden
     boolean isEmpty() {
-        return !(this.hasDisplayName() || this.hasItemName() || this.hasLocalizedName() || this.hasEnchants() || (this.lore != null) || this.hasCustomModelData() || this.hasBlockData() || this.hasRepairCost() || !this.unhandledTags.build().isEmpty() || !this.persistentDataContainer.isEmpty() || this.hideFlag != 0 || this.isHideTooltip() || this.isUnbreakable() || this.hasEnchantmentGlintOverride() || this.isFireResistant() || this.hasMaxStackSize() || this.hasRarity() || this.hasFood() || this.hasDamage() || this.hasMaxDamage() || this.hasAttributeModifiers() || this.customTag != null);
+        return !(this.hasDisplayName() || this.hasItemName() || this.hasLocalizedName() || this.hasEnchants() || (this.lore != null) || this.hasCustomModelData() || this.hasBlockData() || this.hasRepairCost() || !this.unhandledTags.build().isEmpty() || !this.persistentDataContainer.isEmpty() || this.hideFlag != 0 || this.isHideTooltip() || this.isUnbreakable() || this.hasEnchantmentGlintOverride() || this.isFireResistant() || this.hasMaxStackSize() || this.hasRarity() || this.hasFood() || this.hasDamage() || this.hasMaxDamage() || this.hasAttributeModifiers() || this.customTag != null || this.canPlaceOnPredicates != null || this.canBreakPredicates != null); // Paper
     }
 
     // Paper start
@@ -1507,6 +1549,8 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
                 && (this.hasFood() ? that.hasFood() && this.food.equals(that.food) : !that.hasFood())
                 && (this.hasDamage() ? that.hasDamage() && this.damage == that.damage : !that.hasDamage())
                 && (this.hasMaxDamage() ? that.hasMaxDamage() && this.maxDamage.equals(that.maxDamage) : !that.hasMaxDamage())
+                && (this.canPlaceOnPredicates != null ? that.canPlaceOnPredicates != null && this.canPlaceOnPredicates.equals(that.canPlaceOnPredicates) : that.canPlaceOnPredicates == null) // Paper
+                && (this.canBreakPredicates != null ? that.canBreakPredicates != null && this.canBreakPredicates.equals(that.canBreakPredicates) : that.canBreakPredicates == null) // Paper
                 && (this.version == that.version);
     }
 
@@ -1549,6 +1593,8 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
         hash = 61 * hash + (this.hasDamage() ? this.damage : 0);
         hash = 61 * hash + (this.hasMaxDamage() ? 1231 : 1237);
         hash = 61 * hash + (this.hasAttributeModifiers() ? this.attributeModifiers.hashCode() : 0);
+        hash = 61 * hash + (this.canPlaceOnPredicates != null ? this.canPlaceOnPredicates.hashCode() : 0); // Paper
+        hash = 61 * hash + (this.canBreakPredicates != null ? this.canBreakPredicates.hashCode() : 0); // Paper
         hash = 61 * hash + this.version;
         return hash;
     }
@@ -1586,6 +1632,14 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
             clone.damage = this.damage;
             clone.maxDamage = this.maxDamage;
             clone.version = this.version;
+            // Paper start
+            if (this.canPlaceOnPredicates != null) {
+                clone.canPlaceOnPredicates = List.copyOf(this.canPlaceOnPredicates);
+            }
+            if (this.canBreakPredicates != null) {
+                clone.canBreakPredicates = List.copyOf(this.canBreakPredicates);
+            }
+            // Paper end
             return clone;
         } catch (CloneNotSupportedException e) {
             throw new Error(e);
@@ -1695,6 +1749,16 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
             }
         }
 
+        // Paper start
+        final boolean canBreakAddToUnhandled = this.canBreakPredicates != null && !this.canBreakPredicates.isEmpty();
+        if (canBreakAddToUnhandled) {
+            this.unhandledTags.set(DataComponents.CAN_BREAK, new net.minecraft.world.item.AdventureModePredicate(this.canBreakPredicates, !this.hasItemFlag(ItemFlag.HIDE_DESTROYS)));
+        }
+        final boolean canPlaceOnAddToUnhandled = this.canPlaceOnPredicates != null && !this.canPlaceOnPredicates.isEmpty();
+        if (canPlaceOnAddToUnhandled) {
+            this.unhandledTags.set(DataComponents.CAN_PLACE_ON, new net.minecraft.world.item.AdventureModePredicate(this.canPlaceOnPredicates, !this.hasItemFlag(ItemFlag.HIDE_PLACED_ON)));
+        }
+        // Paper end
         if (!this.unhandledTags.isEmpty()) {
             Tag unhandled = DataComponentPatch.CODEC.encodeStart(MinecraftServer.getDefaultRegistryAccess().createSerializationContext(NbtOps.INSTANCE), this.unhandledTags.build()).getOrThrow(IllegalStateException::new);
             try {
@@ -1705,6 +1769,14 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
                 Logger.getLogger(CraftMetaItem.class.getName()).log(Level.SEVERE, null, ex);
             }
         }
+        // Paper start
+        if (canBreakAddToUnhandled) {
+            this.unhandledTags.clear(DataComponents.CAN_BREAK);
+        }
+        if (canPlaceOnAddToUnhandled) {
+            this.unhandledTags.clear(DataComponents.CAN_PLACE_ON);
+        }
+        // Paper end
 
         if (!this.persistentDataContainer.isEmpty()) { // Store custom tags, wrapped in their compound
             builder.put(CraftMetaItem.BUKKIT_CUSTOM_TAG.BUKKIT, this.persistentDataContainer.serialize());
@@ -1846,6 +1918,8 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
                         CraftMetaItem.MAX_DAMAGE.TYPE,
                         CraftMetaItem.CUSTOM_DATA.TYPE,
                         CraftMetaItem.ATTRIBUTES.TYPE,
+                        CraftMetaItem.CAN_PLACE_ON.TYPE, // Paper
+                        CraftMetaItem.CAN_BREAK.TYPE, // Paper
                         CraftMetaArmor.TRIM.TYPE,
                         CraftMetaArmorStand.ENTITY_TAG.TYPE,
                         CraftMetaBanner.PATTERNS.TYPE,