fix item flags

3 files changed, 331 insertions, 6 deletions

diff --git a/patches/server/0792-Add-paper-dumplisteners-command.patch b/patches/server/0792-Add-paper-dumplisteners-command.patch
index ba293d1dad..4170206f59 100644
--- a/patches/server/0792-Add-paper-dumplisteners-command.patch
+++ b/patches/server/0792-Add-paper-dumplisteners-command.patch
@@ -17,6 +17,153 @@ index c9bb2df0d884227576ed8d2e72219bbbd7ba827e..534d9c380f26d6cce3c99fa88ad2e154
  
          return commands.entrySet().stream()
              .flatMap(entry -> entry.getKey().stream().map(s -> Map.entry(s, entry.getValue())))
+diff --git a/src/main/java/io/papermc/paper/command/subcommands/DumpItemCommand.java b/src/main/java/io/papermc/paper/command/subcommands/DumpItemCommand.java
+index efc4ec58ab4b3ceefd66b714d286a6187babc724..fae73bac86fea722be4c9178eda0779ea88d1884 100644
+--- a/src/main/java/io/papermc/paper/command/subcommands/DumpItemCommand.java
++++ b/src/main/java/io/papermc/paper/command/subcommands/DumpItemCommand.java
+@@ -1,19 +1,26 @@
+ package io.papermc.paper.command.subcommands;
+ 
+ import io.papermc.paper.adventure.PaperAdventure;
++import io.papermc.paper.command.CommandUtil;
+ import io.papermc.paper.command.PaperSubcommand;
+ import java.util.ArrayList;
++import java.util.Collections;
++import java.util.IdentityHashMap;
+ import java.util.List;
+ import java.util.Map;
+ import java.util.Optional;
++import java.util.Set;
++import java.util.function.Consumer;
+ import net.kyori.adventure.text.Component;
+ import net.kyori.adventure.text.ComponentLike;
+ import net.kyori.adventure.text.JoinConfiguration;
+ import net.kyori.adventure.text.TextComponent;
+ import net.minecraft.core.Registry;
+ import net.minecraft.core.RegistryAccess;
++import net.minecraft.core.component.DataComponentMap;
+ import net.minecraft.core.component.DataComponentPatch;
+ import net.minecraft.core.component.DataComponentType;
++import net.minecraft.core.component.TypedDataComponent;
+ import net.minecraft.core.registries.Registries;
+ import net.minecraft.nbt.NbtOps;
+ import net.minecraft.nbt.NbtUtils;
+@@ -25,6 +32,7 @@ import org.bukkit.craftbukkit.CraftServer;
+ import org.bukkit.craftbukkit.inventory.CraftItemStack;
+ import org.bukkit.entity.Player;
+ import org.checkerframework.checker.nullness.qual.NonNull;
++import org.checkerframework.checker.nullness.qual.Nullable;
+ import org.checkerframework.framework.qual.DefaultQualifier;
+ 
+ import static net.kyori.adventure.text.Component.join;
+@@ -36,17 +44,19 @@ import static net.kyori.adventure.text.format.NamedTextColor.GRAY;
+ import static net.kyori.adventure.text.format.NamedTextColor.RED;
+ import static net.kyori.adventure.text.format.NamedTextColor.WHITE;
+ import static net.kyori.adventure.text.format.NamedTextColor.YELLOW;
++import static net.kyori.adventure.text.format.TextColor.color;
+ import static net.kyori.adventure.text.format.TextDecoration.ITALIC;
+ 
+ @DefaultQualifier(NonNull.class)
+ public final class DumpItemCommand implements PaperSubcommand {
+     @Override
+     public boolean execute(final CommandSender sender, final String subCommand, final String[] args) {
+-        this.doDumpItem(sender);
++        this.doDumpItem(sender, args.length > 0 && "all".equals(args[0]));
+         return true;
+     }
+ 
+-    private void doDumpItem(final CommandSender sender) {
++    @SuppressWarnings({"unchecked", "OptionalAssignedToNull", "rawtypes"})
++    private void doDumpItem(final CommandSender sender, final boolean includeAllComponents) {
+         if (!(sender instanceof final Player player)) {
+             sender.sendMessage("Only players can use this command");
+             return;
+@@ -57,38 +67,65 @@ public final class DumpItemCommand implements PaperSubcommand {
+         final String itemName = itemStack.getItemHolder().unwrapKey().orElseThrow().location().toString();
+         itemCommandBuilder.append(itemName);
+         visualOutput.append(text(itemName, YELLOW)); // item type
++        final Set<DataComponentType<?>> referencedComponentTypes = Collections.newSetFromMap(new IdentityHashMap<>());
+         final DataComponentPatch patch = itemStack.getComponentsPatch();
++        referencedComponentTypes.addAll(patch.entrySet().stream().map(Map.Entry::getKey).toList());
++        final DataComponentMap prototype = itemStack.getItem().components();
++        if (includeAllComponents) {
++            referencedComponentTypes.addAll(prototype.keySet());
++        }
+ 
+         final RegistryAccess.Frozen access = ((CraftServer) sender.getServer()).getServer().registryAccess();
+         final RegistryOps<Tag> ops = access.createSerializationContext(NbtOps.INSTANCE);
+         final Registry<DataComponentType<?>> registry = access.registryOrThrow(Registries.DATA_COMPONENT_TYPE);
+-        if (!patch.isEmpty()) {
+-            visualOutput.append(text("[", WHITE));
+-            itemCommandBuilder.append("[");
+-            final List<ComponentLike> componentComponents = new ArrayList<>();
+-            final List<String> commandComponents = new ArrayList<>();
+-            for (final Map.Entry<DataComponentType<?>, Optional<?>> entry : patch.entrySet()) {
+-                final String path = registry.getResourceKey(entry.getKey()).orElseThrow().location().getPath();
+-                if (entry.getValue().isEmpty()) {
++        final List<ComponentLike> componentComponents = new ArrayList<>();
++        final List<String> commandComponents = new ArrayList<>();
++        for (final DataComponentType<?> type : referencedComponentTypes) {
++            final String path = registry.getResourceKey(type).orElseThrow().location().getPath();
++            final @Nullable Optional<?> patchedValue = patch.get(type);
++            final @Nullable TypedDataComponent<?> prototypeValue = prototype.getTyped(type);
++            if (patchedValue != null) {
++                if (patchedValue.isEmpty()) {
+                     componentComponents.add(text().append(text('!', RED), text(path, AQUA)));
+                     commandComponents.add("!" + path);
+                 } else {
+-                    final Tag serialized = (Tag) ((DataComponentType) entry.getKey()).codecOrThrow().encodeStart(ops, entry.getValue().get()).getOrThrow();
+-                    componentComponents.add(textOfChildren(
+-                        text(path, AQUA),
+-                        text("=", WHITE),
+-                        PaperAdventure.asAdventure(NbtUtils.toPrettyComponent(serialized))
+-                    ));
+-                    commandComponents.add(path + "=" + serialized.getAsString());
++                    final Tag serialized = (Tag) ((DataComponentType) type).codecOrThrow().encodeStart(ops, patchedValue.get()).getOrThrow();
++                    writeComponentValue(componentComponents::add, commandComponents::add, path, serialized);
+                 }
+-
++            } else if (includeAllComponents && prototypeValue != null) {
++                final Tag serialized = prototypeValue.encodeValue(ops).getOrThrow();
++                writeComponentValue(componentComponents::add, commandComponents::add, path, serialized);
+             }
+-            visualOutput
+-                .append(join(JoinConfiguration.separator(text(",", WHITE)), componentComponents))
+-                .append(text("]", WHITE));
+-            itemCommandBuilder.append(String.join(",", commandComponents)).append("]");
++        }
++        if (!componentComponents.isEmpty()) {
++            visualOutput.append(
++                text("[", color(0x8910CE)),
++                join(JoinConfiguration.separator(text(",", GRAY)), componentComponents),
++                text("]", color(0x8910CE))
++            );
++            itemCommandBuilder
++                .append("[")
++                .append(String.join(",", commandComponents))
++                .append("]");
+         }
+         final Component hoverMsg = text("Click to copy item definition to clipboard for use with /pgive", GRAY, ITALIC);
+         player.sendMessage(visualOutput.build().compact().hoverEvent(hoverMsg).clickEvent(copyToClipboard(itemCommandBuilder.toString())));
+     }
++
++    private static void writeComponentValue(final Consumer<Component> visualOutput, final Consumer<String> commandOutput, final String path, final Tag serialized) {
++        visualOutput.accept(textOfChildren(
++            text(path, color(0xFF7FD7)),
++            text("=", WHITE),
++            PaperAdventure.asAdventure(NbtUtils.toPrettyComponent(serialized))
++        ));
++        commandOutput.accept(path + "=" + serialized.getAsString());
++    }
++
++    @Override
++    public List<String> tabComplete(final CommandSender sender, final String subCommand, final String[] args) {
++        if (args.length == 1) {
++            return CommandUtil.getListMatchingLast(sender, args, "all");
++        }
++        return Collections.emptyList();
++    }
+ }
 diff --git a/src/main/java/io/papermc/paper/command/subcommands/DumpListenersCommand.java b/src/main/java/io/papermc/paper/command/subcommands/DumpListenersCommand.java
 new file mode 100644
 index 0000000000000000000000000000000000000000..aa44d4685de3caee4131449bead7a084868ff976
diff --git a/patches/server/1042-Add-experimental-improved-give-command.patch b/patches/server/1042-Add-experimental-improved-give-command.patch
index b7a7ef41c0..aaadb56694 100644
--- a/patches/server/1042-Add-experimental-improved-give-command.patch
+++ b/patches/server/1042-Add-experimental-improved-give-command.patch
@@ -183,7 +183,7 @@ index 5347a96be3bfbbd2963747ba4b5f222215d80371..fa431de18de902c580855e9c44191255
          default void visitSuggestions(Function<SuggestionsBuilder, CompletableFuture<Suggestions>> suggestor) {
          }
 diff --git a/src/main/java/net/minecraft/server/commands/GiveCommand.java b/src/main/java/net/minecraft/server/commands/GiveCommand.java
-index 0d9de4c61c7b26a6ff37c12fde629161fd0c3d5a..c738bbfa73888a0caed507e02f5c113f681e5cc2 100644
+index 0d9de4c61c7b26a6ff37c12fde629161fd0c3d5a..47355158e5e762540a10dc67b23092a0fc53bce3 100644
 --- a/src/main/java/net/minecraft/server/commands/GiveCommand.java
 +++ b/src/main/java/net/minecraft/server/commands/GiveCommand.java
 @@ -34,6 +34,38 @@ public class GiveCommand {
@@ -192,13 +192,13 @@ index 0d9de4c61c7b26a6ff37c12fde629161fd0c3d5a..c738bbfa73888a0caed507e02f5c113f
          })))));
 +        // Paper start - support component removals with a custom pgive command
 +        final com.mojang.brigadier.tree.CommandNode<net.minecraft.commands.CommandSourceStack> node = net.minecraft.commands.Commands
-+            .literal("pgive").requires((commandlistenerwrapper) ->  commandlistenerwrapper.hasPermission(2))
++            .literal("pgive").requires((css) ->  css.hasPermission(2))
 +            .then(net.minecraft.commands.Commands.argument("targets", EntityArgument.players())
-+                .then(net.minecraft.commands.Commands.argument("item", new ItemArgument(commandRegistryAccess, true)).executes((commandcontext) -> {
-+                    return GiveCommand.giveItem((CommandSourceStack) commandcontext.getSource(), ItemArgument.getItem(commandcontext, "item"), EntityArgument.getPlayers(commandcontext, "targets"), 1);
++                .then(net.minecraft.commands.Commands.argument("item", new ItemArgument(commandRegistryAccess, true)).executes((ctx) -> {
++                    return GiveCommand.giveItem(ctx.getSource(), ItemArgument.getItem(ctx, "item"), EntityArgument.getPlayers(ctx, "targets"), 1);
 +                })
-+                    .then(net.minecraft.commands.Commands.argument("count", IntegerArgumentType.integer(1)).executes((commandcontext) -> {
-+                        return GiveCommand.giveItem((CommandSourceStack) commandcontext.getSource(), ItemArgument.getItem(commandcontext, "item"), EntityArgument.getPlayers(commandcontext, "targets"), IntegerArgumentType.getInteger(commandcontext, "count"));
++                    .then(net.minecraft.commands.Commands.argument("count", IntegerArgumentType.integer(1)).executes((ctx) -> {
++                        return GiveCommand.giveItem(ctx.getSource(), ItemArgument.getItem(ctx, "item"), EntityArgument.getPlayers(ctx, "targets"), IntegerArgumentType.getInteger(ctx, "count"));
 +                    }))
 +                )
 +            ).build();
diff --git a/patches/server/1044-Fix-ItemFlag-HIDE_DESTROYES-HIDE_PLACED_ON.patch b/patches/server/1044-Fix-ItemFlag-HIDE_DESTROYES-HIDE_PLACED_ON.patch
new file mode 100644
index 0000000000..dd2167c3e8
--- /dev/null
+++ b/patches/server/1044-Fix-ItemFlag-HIDE_DESTROYES-HIDE_PLACED_ON.patch
@@ -0,0 +1,178 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <[email protected]>
+Date: Sat, 27 Apr 2024 12:16:38 -0700
+Subject: [PATCH] Fix ItemFlag HIDE_DESTROYES & HIDE_PLACED_ON
+
+== AT ==
+public net.minecraft.world.item.AdventureModePredicate predicates
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
+index 94e9213414ec08794e875c23c300bfae5dcc877e..940c2c9663657369eda6962728bd37a869209199 100644
+--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
++++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
+@@ -224,6 +224,12 @@ 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;
+@@ -296,6 +302,10 @@ 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) {
+@@ -384,6 +394,20 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+                 }
+             }
+         });
++        // 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) {
+@@ -565,10 +589,19 @@ 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);
+             }
+@@ -786,6 +819,15 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+             itemTag.put(CraftMetaItem.MAX_DAMAGE, this.maxDamage);
+         }
+ 
++        // Paper start
++        if (this.canPlaceOnPredicates != null || this.hasItemFlag(ItemFlag.HIDE_PLACED_ON)) {
++            itemTag.put(CraftMetaItem.CAN_PLACE_ON, new net.minecraft.world.item.AdventureModePredicate(this.canPlaceOnPredicates != null ? this.canPlaceOnPredicates : Collections.emptyList(), !this.hasItemFlag(ItemFlag.HIDE_PLACED_ON)));
++        }
++        if (this.canBreakPredicates != null || this.hasItemFlag(ItemFlag.HIDE_DESTROYS)) {
++            itemTag.put(CraftMetaItem.CAN_BREAK, new net.minecraft.world.item.AdventureModePredicate(this.canBreakPredicates != null ? this.canBreakPredicates : Collections.emptyList(), !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);
+@@ -858,7 +900,7 @@ 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
+@@ -1453,6 +1495,8 @@ 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);
+     }
+ 
+@@ -1495,6 +1539,8 @@ 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;
+     }
+@@ -1532,6 +1578,14 @@ 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);
+@@ -1641,6 +1695,16 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
+             }
+         }
+ 
++        // Paper start
++        final boolean canBreakAddToUnhandled = this.canBreakPredicates != null || this.hasItemFlag(ItemFlag.HIDE_DESTROYS);
++        if (canBreakAddToUnhandled) {
++            this.unhandledTags.set(DataComponents.CAN_BREAK, new net.minecraft.world.item.AdventureModePredicate(this.canBreakPredicates != null ? this.canBreakPredicates : Collections.emptyList(), !this.hasItemFlag(ItemFlag.HIDE_DESTROYS)));
++        }
++        final boolean canPlaceOnAddToUnhandled = this.canPlaceOnPredicates != null || this.hasItemFlag(ItemFlag.HIDE_PLACED_ON);
++        if (canPlaceOnAddToUnhandled) {
++            this.unhandledTags.set(DataComponents.CAN_PLACE_ON, new net.minecraft.world.item.AdventureModePredicate(this.canPlaceOnPredicates != null ? this.canPlaceOnPredicates : Collections.emptyList(), !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 {
+@@ -1651,6 +1715,14 @@ 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());
+@@ -1792,6 +1864,8 @@ 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,