protocol, final String version) {\n super(protocol);\n this.translatables = TranslatableMappings.translatablesFor(version);\n }\n\n @Override\n protected void handleTranslate(final JsonObject root, final String translate) {\n final String newTranslate = mappedTranslationKey(translate);\n if (newTranslate != null) {\n root.addProperty(\"translate\", newTranslate);\n }\n }\n\n @Override\n protected void handleTranslate(final UserConnection connection, final CompoundTag parentTag, final StringTag translateTag) {\n final String newTranslate = mappedTranslationKey(translateTag.getValue());\n if (newTranslate != null) {\n parentTag.put(\"translate\", new StringTag(newTranslate));\n }\n }\n\n @Override\n public @Nullable String mappedTranslationKey(final String translationKey) {\n return translatables.get(translationKey);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/api/rewriters/text/TranslatableRewriter.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.api.rewriters.text;\n\nimport com.viaversion.viaversion.api.rewriter.ComponentRewriter;\nimport org.checkerframework.checker.nullness.qual.Nullable;\n\npublic interface TranslatableRewriter extends ComponentRewriter {\n\n @Nullable\n String mappedTranslationKey(String translationKey);\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/item/DataItemWithExtras.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.item;\n\nimport com.viaversion.nbt.tag.CompoundTag;\nimport com.viaversion.nbt.tag.ListTag;\nimport com.viaversion.nbt.tag.StringTag;\nimport com.viaversion.viaversion.api.minecraft.item.DataItem;\nimport com.viaversion.viaversion.api.minecraft.item.Item;\nimport com.viaversion.viaversion.libs.gson.JsonElement;\nimport com.viaversion.viaversion.libs.gson.JsonParser;\nimport com.viaversion.viaversion.libs.gson.JsonPrimitive;\nimport com.viaversion.viaversion.libs.gson.JsonSyntaxException;\nimport java.util.ArrayList;\nimport java.util.List;\nimport org.checkerframework.checker.nullness.qual.Nullable;\n\n/**\n * Prevent expensive parsing/toString by checking against cached JsonElement instances, used from 1.14 to 1.20.5.\n * \n * When using this, be careful not to break caching by modifying the display tag directly.\n */\npublic final class DataItemWithExtras extends DataItem {\n\n private JsonElement name;\n private List lore;\n\n public DataItemWithExtras(final Item from) {\n setIdentifier(from.identifier());\n setAmount(from.amount());\n setData(from.data());\n setTag(from.tag());\n\n if (tag() == null) {\n return;\n }\n\n final CompoundTag display = tag().getCompoundTag(\"display\");\n if (display == null) {\n return;\n }\n\n final StringTag name = display.getStringTag(\"Name\");\n if (name != null) {\n this.name = parse(name.getValue());\n }\n\n final ListTag lore = display.getListTag(\"Lore\", StringTag.class);\n if (lore != null) {\n this.lore = new ArrayList<>(lore.size());\n for (int i = 0; i < lore.size(); i++) {\n this.lore.add(parse(lore.get(i).getValue()));\n }\n }\n }\n\n public @Nullable JsonElement name() {\n return name;\n }\n\n public @Nullable StringTag rawName() {\n if (tag() == null) {\n return null;\n }\n final CompoundTag display = tag().getCompoundTag(\"display\");\n return display != null ? display.getStringTag(\"Name\") : null;\n }\n\n public @Nullable List lore() {\n return lore;\n }\n\n public @Nullable ListTag rawLore() {\n if (tag() == null) {\n return null;\n }\n final CompoundTag display = tag().getCompoundTag(\"display\");\n return display != null ? display.getListTag(\"Lore\", StringTag.class) : null;\n }\n\n private JsonElement parse(final String value) {\n try {\n return JsonParser.parseString(value);\n } catch (final JsonSyntaxException e) {\n return new JsonPrimitive(value);\n }\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/registration/BackwardsRegistrations.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.registration;\n\nimport com.viaversion.viaversion.api.protocol.version.ProtocolVersion;\nimport com.viaversion.viaversion.protocol.shared_registration.SharedRegistrations;\n\npublic final class BackwardsRegistrations {\n\n private static final SharedRegistrations REGISTRATIONS = SharedRegistrations.create();\n\n public static void apply() {\n REGISTRATIONS.registrations()\n .range(ProtocolVersion.v1_10, ProtocolVersion.v1_19_3, RegistryRegistrations::registerNamedSound1_10)\n .since(ProtocolVersion.v1_14, RegistryRegistrations::registerStopSound1_14)\n\n .register();\n }\n\n public static SharedRegistrations registrations() {\n return REGISTRATIONS;\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/registration/RegistryRegistrations.java",
"content": "/*\n * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.registration;\n\nimport com.viaversion.viabackwards.api.rewriters.SoundRewriter;\nimport com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;\nimport com.viaversion.viaversion.protocol.shared_registration.PacketBound;\nimport com.viaversion.viaversion.protocol.shared_registration.RegistrationContext;\nimport com.viaversion.viaversion.protocols.v1_13_2to1_14.packet.ClientboundPackets1_14;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\n\nfinal class RegistryRegistrations {\n\n static void registerNamedSound1_10(final RegistrationContext ctx) {\n ctx.clientbound(ClientboundPackets1_9_3.CUSTOM_SOUND, new SoundRewriter<>(ctx.protocol())::registerNamedSound, PacketBound.REMOVED_AT_MAX);\n }\n\n static void registerStopSound1_14(final RegistrationContext ctx) {\n ctx.clientbound(ClientboundPackets1_14.STOP_SOUND, new SoundRewriter<>(ctx.protocol())::registerStopSound);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/template/BlockItemPacketRewriter99_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.template;\n\nimport com.viaversion.nbt.tag.CompoundTag;\nimport com.viaversion.viabackwards.api.rewriters.BackwardsStructuredItemRewriter;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.minecraft.data.StructuredDataContainer;\nimport com.viaversion.viaversion.api.minecraft.item.Item;\nimport com.viaversion.viaversion.protocols.v1_21_11to26_1.packet.ClientboundPacket26_1;\nimport com.viaversion.viaversion.protocols.v1_21_7to1_21_9.packet.ServerboundPacket1_21_9;\n\n// To replace if needed:\n// ChunkType1_21_5\n// RecipeDisplayRewriter\nfinal class BlockItemPacketRewriter99_1 extends BackwardsStructuredItemRewriter {\n\n public BlockItemPacketRewriter99_1(final Protocol99_1To98_1 protocol) {\n super(protocol);\n }\n\n @Override\n public void registerPackets() {\n }\n\n @Override\n protected void handleItemDataComponentsToClient(final UserConnection connection, final Item item, final StructuredDataContainer container) {\n super.handleItemDataComponentsToClient(connection, item, container);\n // downgradeData(item, container); // static import VV method\n }\n\n @Override\n protected void handleItemDataComponentsToServer(final UserConnection connection, final Item item, final StructuredDataContainer container) {\n super.handleItemDataComponentsToServer(connection, item, container);\n // upgradeData(item, container); // static import VV method\n }\n\n @Override\n protected void restoreBackupData(final Item item, final StructuredDataContainer container, final CompoundTag customData) {\n super.restoreBackupData(item, container, customData);\n // restore any data if needed here\n }\n\n @Override\n protected void backupInconvertibleData(final UserConnection connection, final Item item, final StructuredDataContainer dataContainer, final CompoundTag backupTag) {\n super.backupInconvertibleData(connection, item, dataContainer, backupTag);\n // back up any data if needed here, called before the method below\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/template/ComponentRewriter99_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.template;\n\nimport com.viaversion.nbt.tag.CompoundTag;\nimport com.viaversion.viabackwards.api.BackwardsProtocol;\nimport com.viaversion.viabackwards.api.rewriters.text.NBTComponentRewriter;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.protocols.v1_21_11to26_1.packet.ClientboundPacket26_1;\n\nfinal class ComponentRewriter99_1 extends NBTComponentRewriter {\n\n public ComponentRewriter99_1(final BackwardsProtocol protocol) {\n super(protocol);\n }\n\n @Override\n protected void handleShowItem(final UserConnection connection, final CompoundTag itemTag, final CompoundTag componentsTag) {\n super.handleShowItem(connection, itemTag, componentsTag);\n if (componentsTag == null) {\n return;\n }\n\n // Remove or update data from componentsTag\n // Newly added data which is not handled otherwise needs to be removed to prevent errors on the client\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/template/EntityPacketRewriter99_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.template;\n\nimport com.viaversion.viabackwards.api.rewriters.EntityRewriter;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityType;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_21_11;\nimport com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes26_1;\nimport com.viaversion.viaversion.api.type.types.version.VersionedTypes;\nimport com.viaversion.viaversion.protocols.v1_21_11to26_1.packet.ClientboundPacket26_1;\n\n// Replace if needed\n// VersionedTypes\nfinal class EntityPacketRewriter99_1 extends EntityRewriter {\n\n private static final EntityDataTypes26_1 MAPPED_DATA_TYPES = VersionedTypes.V26_1.entityDataTypes;\n\n public EntityPacketRewriter99_1(final Protocol99_1To98_1 protocol) {\n super(protocol, MAPPED_DATA_TYPES.optionalComponentType, MAPPED_DATA_TYPES.booleanType);\n }\n\n @Override\n public void registerPackets() {\n }\n\n @Override\n protected void registerRewrites() {\n dataTypeMapper().register();\n /* ... or like this for additions and removals that are not at the very end\n dataTypeMapper()\n .added(MAPPED_DATA_TYPES.catSoundVariant)\n .removed(MAPPED_DATA_TYPES.cowSoundVariant)\n .skip(MAPPED_DATA_TYPES.pigSoundVariant) // if neither removed nor added, but the value type has to be changed separately\n .register();*/\n\n registerEntityDataTypeHandler1_20_3(\n MAPPED_DATA_TYPES.itemType,\n MAPPED_DATA_TYPES.blockStateType,\n MAPPED_DATA_TYPES.optionalBlockStateType,\n MAPPED_DATA_TYPES.particleType,\n MAPPED_DATA_TYPES.particlesType,\n MAPPED_DATA_TYPES.componentType,\n MAPPED_DATA_TYPES.optionalComponentType\n );\n\n // Remove entity data of new entity type\n // filter().type(EntityTypes1_21_11.SNIFFER).removeIndex(newIndex);\n }\n\n @Override\n public void onMappingDataLoaded() {\n super.onMappingDataLoaded();\n // mapEntityTypeWithData(EntityTypes1_21_11.SNIFFER, EntityTypes1_21_11.RAVAGER).tagName();\n }\n\n @Override\n public EntityType typeFromId(final int type) {\n return EntityTypes1_21_11.getTypeFromId(type);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/template/Protocol99_1To98_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.template;\n\nimport com.viaversion.viabackwards.api.BackwardsProtocol;\nimport com.viaversion.viabackwards.api.data.BackwardsMappingData;\nimport com.viaversion.viabackwards.api.rewriters.BackwardsRegistryRewriter;\nimport com.viaversion.viabackwards.api.rewriters.text.NBTComponentRewriter;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_21_11;\nimport com.viaversion.viaversion.api.protocol.packet.provider.PacketTypesProvider;\nimport com.viaversion.viaversion.api.protocol.packet.provider.SimplePacketTypesProvider;\nimport com.viaversion.viaversion.api.type.types.chunk.ChunkType26_1;\nimport com.viaversion.viaversion.api.type.types.version.VersionedTypes;\nimport com.viaversion.viaversion.api.type.types.version.VersionedTypesHolder;\nimport com.viaversion.viaversion.data.entity.EntityTrackerBase;\nimport com.viaversion.viaversion.data.item.ItemHasherBase;\nimport com.viaversion.viaversion.protocols.v1_21_11to26_1.Protocol1_21_11To26_1;\nimport com.viaversion.viaversion.protocols.v1_21_11to26_1.packet.ClientboundPacket26_1;\nimport com.viaversion.viaversion.protocols.v1_21_11to26_1.packet.ClientboundPackets26_1;\nimport com.viaversion.viaversion.protocols.v1_21_4to1_21_5.rewriter.RecipeDisplayRewriter1_21_5;\nimport com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ServerboundPackets1_21_6;\nimport com.viaversion.viaversion.protocols.v1_21_7to1_21_9.packet.ClientboundConfigurationPackets1_21_9;\nimport com.viaversion.viaversion.protocols.v1_21_7to1_21_9.packet.ServerboundConfigurationPackets1_21_9;\nimport com.viaversion.viaversion.protocols.v1_21_7to1_21_9.packet.ServerboundPacket1_21_9;\nimport com.viaversion.viaversion.rewriter.BlockRewriter;\nimport com.viaversion.viaversion.rewriter.ParticleRewriter;\nimport com.viaversion.viaversion.rewriter.RecipeDisplayRewriter;\nimport com.viaversion.viaversion.rewriter.TagRewriter;\nimport com.viaversion.viaversion.rewriter.block.BlockRewriter1_21_5;\n\nimport static com.viaversion.viaversion.util.ProtocolUtil.packetTypeMap;\n\n// Placeholders to replace (in the entire package):\n// Protocol1_21_11To26_1 (the ViaVersion protocol class the mappings depend on)\n// ClientboundPacket26_1\n// ServerboundPacket1_21_9\n// ClientboundConfigurationPackets1_21\n// ServerboundConfigurationPackets1_20_5\n// EntityTypes1_21_11 (UNMAPPED type)\n// VersionedTypes.V26_1\n// 99.1, 98.1\nfinal class Protocol99_1To98_1 extends BackwardsProtocol {\n\n // ViaBackwards uses its own mappings and also needs a translatablerewriter for translation mappings\n public static final BackwardsMappingData MAPPINGS = new BackwardsMappingData(\"99.1\", \"98.1\", Protocol1_21_11To26_1.class); // Change the VV (!) protocol class\n private final EntityPacketRewriter99_1 entityRewriter = new EntityPacketRewriter99_1(this);\n private final BlockItemPacketRewriter99_1 itemRewriter = new BlockItemPacketRewriter99_1(this);\n private final ParticleRewriter particleRewriter = new ParticleRewriter<>(this);\n private final NBTComponentRewriter translatableRewriter = new ComponentRewriter99_1(this);\n private final TagRewriter tagRewriter = new TagRewriter<>(this);\n private final BackwardsRegistryRewriter registryDataRewriter = new BackwardsRegistryRewriter(this);\n private final BlockRewriter blockRewriter = new BlockRewriter1_21_5<>(this, ChunkType26_1::new);\n private final RecipeDisplayRewriter recipeRewriter = new RecipeDisplayRewriter1_21_5<>(this);\n\n public Protocol99_1To98_1() {\n super(ClientboundPacket26_1.class, ClientboundPacket26_1.class, ServerboundPacket1_21_9.class, ServerboundPacket1_21_9.class);\n }\n\n @Override\n protected void registerPackets() {\n super.registerPackets();\n }\n\n @Override\n public void init(final UserConnection connection) {\n addEntityTracker(connection, new EntityTrackerBase(connection, EntityTypes1_21_11.PLAYER));\n addItemHasher(connection, new ItemHasherBase(this, connection));\n }\n\n @Override\n public BackwardsMappingData getMappingData() {\n return MAPPINGS;\n }\n\n @Override\n public EntityPacketRewriter99_1 getEntityRewriter() {\n return entityRewriter;\n }\n\n @Override\n public BlockItemPacketRewriter99_1 getItemRewriter() {\n return itemRewriter;\n }\n\n @Override\n public BlockRewriter getBlockRewriter() {\n return blockRewriter;\n }\n\n @Override\n public RecipeDisplayRewriter getRecipeRewriter() {\n return recipeRewriter;\n }\n\n @Override\n public BackwardsRegistryRewriter getRegistryDataRewriter() {\n return registryDataRewriter;\n }\n\n @Override\n public ParticleRewriter getParticleRewriter() {\n return particleRewriter;\n }\n\n @Override\n public NBTComponentRewriter getComponentRewriter() {\n return translatableRewriter;\n }\n\n @Override\n public TagRewriter getTagRewriter() {\n return tagRewriter;\n }\n\n @Override\n public VersionedTypesHolder types() {\n return VersionedTypes.V26_1;\n }\n\n @Override\n public VersionedTypesHolder mappedTypes() {\n return VersionedTypes.V26_1;\n }\n\n @Override\n protected PacketTypesProvider createPacketTypesProvider() {\n return new SimplePacketTypesProvider<>(\n packetTypeMap(unmappedClientboundPacketType, ClientboundPackets26_1.class, ClientboundConfigurationPackets1_21_9.class),\n packetTypeMap(mappedClientboundPacketType, ClientboundPackets26_1.class, ClientboundConfigurationPackets1_21_9.class),\n packetTypeMap(mappedServerboundPacketType, ServerboundPackets1_21_6.class, ServerboundConfigurationPackets1_21_9.class),\n packetTypeMap(unmappedServerboundPacketType, ServerboundPackets1_21_6.class, ServerboundConfigurationPackets1_21_9.class)\n );\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_10to1_9_3/Protocol1_10To1_9_3.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_10to1_9_3;\n\nimport com.viaversion.viabackwards.api.BackwardsProtocol;\nimport com.viaversion.viabackwards.api.data.BackwardsMappingData;\nimport com.viaversion.viabackwards.api.rewriters.SoundRewriter;\nimport com.viaversion.viabackwards.api.rewriters.text.JsonNBTComponentRewriter;\nimport com.viaversion.viabackwards.protocol.v1_10to1_9_3.rewriter.BlockItemPacketRewriter1_10;\nimport com.viaversion.viabackwards.protocol.v1_10to1_9_3.rewriter.EntityPacketRewriter1_10;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.minecraft.ClientWorld;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_10;\nimport com.viaversion.viaversion.api.protocol.packet.PacketWrapper;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.protocol.remapper.ValueTransformer;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.data.entity.EntityTrackerBase;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;\nimport com.viaversion.viaversion.rewriter.text.ComponentRewriterBase;\n\npublic class Protocol1_10To1_9_3 extends BackwardsProtocol {\n\n public static final BackwardsMappingData MAPPINGS = new BackwardsMappingData(\"1.10\", \"1.9.4\");\n private static final ValueTransformer TO_OLD_PITCH = new ValueTransformer<>(Types.UNSIGNED_BYTE) {\n public Short transform(PacketWrapper packetWrapper, Float inputValue) {\n return (short) Math.round(inputValue * 63.5F);\n }\n };\n private final EntityPacketRewriter1_10 entityRewriter = new EntityPacketRewriter1_10(this);\n private final BlockItemPacketRewriter1_10 itemRewriter = new BlockItemPacketRewriter1_10(this);\n\n public Protocol1_10To1_9_3() {\n super(ClientboundPackets1_9_3.class, ClientboundPackets1_9_3.class, ServerboundPackets1_9_3.class, ServerboundPackets1_9_3.class);\n }\n\n @Override\n protected void registerPackets() {\n entityRewriter.register();\n itemRewriter.register();\n\n SoundRewriter soundRewriter = new SoundRewriter<>(this);\n replaceClientbound(ClientboundPackets1_9_3.CUSTOM_SOUND, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.STRING); // 0 - Sound name\n map(Types.VAR_INT); // 1 - Sound Category\n map(Types.INT); // 2 - x\n map(Types.INT); // 3 - y\n map(Types.INT); // 4 - z\n map(Types.FLOAT); // 5 - Volume\n map(Types.FLOAT, TO_OLD_PITCH); // 6 - Pitch\n handler(soundRewriter.getNamedSoundHandler());\n }\n });\n replaceClientbound(ClientboundPackets1_9_3.SOUND, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Sound name\n map(Types.VAR_INT); // 1 - Sound Category\n map(Types.INT); // 2 - x\n map(Types.INT); // 3 - y\n map(Types.INT); // 4 - z\n map(Types.FLOAT); // 5 - Volume\n map(Types.FLOAT, TO_OLD_PITCH); // 6 - Pitch\n handler(soundRewriter.getSoundHandler());\n }\n });\n\n registerServerbound(ServerboundPackets1_9_3.RESOURCE_PACK, new PacketHandlers() {\n @Override\n public void register() {\n read(Types.STRING); // 0 - Hash\n map(Types.VAR_INT); // 1 - Result\n }\n });\n\n JsonNBTComponentRewriter componentRewriter = new JsonNBTComponentRewriter<>(this, ComponentRewriterBase.ReadType.JSON);\n componentRewriter.registerComponentPacket(ClientboundPackets1_9_3.CHAT);\n }\n\n @Override\n public void init(UserConnection user) {\n user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_10.EntityType.PLAYER));\n user.addClientWorld(this.getClass(), new ClientWorld());\n }\n\n @Override\n public BackwardsMappingData getMappingData() {\n return MAPPINGS;\n }\n\n @Override\n public EntityPacketRewriter1_10 getEntityRewriter() {\n return entityRewriter;\n }\n\n @Override\n public BlockItemPacketRewriter1_10 getItemRewriter() {\n return itemRewriter;\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_10to1_9_3/rewriter/BlockItemPacketRewriter1_10.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_10to1_9_3.rewriter;\n\nimport com.viaversion.viabackwards.api.rewriters.LegacyBlockItemRewriter;\nimport com.viaversion.viabackwards.protocol.v1_10to1_9_3.Protocol1_10To1_9_3;\nimport com.viaversion.viaversion.api.minecraft.ClientWorld;\nimport com.viaversion.viaversion.api.minecraft.chunks.Chunk;\nimport com.viaversion.viaversion.api.minecraft.item.Item;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.api.type.types.chunk.ChunkType1_9_3;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;\n\npublic class BlockItemPacketRewriter1_10 extends LegacyBlockItemRewriter {\n\n public BlockItemPacketRewriter1_10(Protocol1_10To1_9_3 protocol) {\n super(protocol, \"1.10\");\n }\n\n @Override\n protected void registerPackets() {\n registerBlockChange(ClientboundPackets1_9_3.BLOCK_UPDATE);\n registerMultiBlockChange(ClientboundPackets1_9_3.CHUNK_BLOCKS_UPDATE);\n\n registerSetSlot(ClientboundPackets1_9_3.CONTAINER_SET_SLOT);\n registerSetContent(ClientboundPackets1_9_3.CONTAINER_SET_CONTENT);\n\n registerSetEquippedItem(ClientboundPackets1_9_3.SET_EQUIPPED_ITEM);\n registerCustomPayloadTradeList(ClientboundPackets1_9_3.CUSTOM_PAYLOAD);\n\n registerContainerClick(ServerboundPackets1_9_3.CONTAINER_CLICK);\n registerSetCreativeModeSlot(ServerboundPackets1_9_3.SET_CREATIVE_MODE_SLOT);\n\n protocol.registerClientbound(ClientboundPackets1_9_3.LEVEL_CHUNK, wrapper -> {\n ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_10To1_9_3.class);\n\n ChunkType1_9_3 type = ChunkType1_9_3.forEnvironment(clientWorld.getEnvironment());\n Chunk chunk = wrapper.passthrough(type);\n\n handleChunk(chunk);\n });\n\n // Rewrite entity data items\n protocol.getEntityRewriter().filter().handler((event, data) -> {\n if (data.dataType().type().equals(Types.ITEM1_8)) // Is Item\n data.setValue(handleItemToClient(event.user(), (Item) data.getValue()));\n });\n\n // Particle\n protocol.registerClientbound(ClientboundPackets1_9_3.LEVEL_PARTICLES, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.INT);\n map(Types.BOOLEAN);\n map(Types.FLOAT);\n map(Types.FLOAT);\n map(Types.FLOAT);\n map(Types.FLOAT);\n map(Types.FLOAT);\n map(Types.FLOAT);\n map(Types.FLOAT);\n map(Types.INT);\n\n handler(wrapper -> {\n int id = wrapper.get(Types.INT, 0);\n if (id == 46) { // new falling_dust\n wrapper.set(Types.INT, 0, 38); // -> block_dust\n }\n });\n }\n });\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_10to1_9_3/rewriter/EntityPacketRewriter1_10.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_10to1_9_3.rewriter;\n\nimport com.viaversion.viabackwards.api.entities.storage.EntityReplacement;\nimport com.viaversion.viabackwards.api.entities.storage.WrappedEntityData;\nimport com.viaversion.viabackwards.api.rewriters.LegacyEntityRewriter;\nimport com.viaversion.viabackwards.protocol.v1_10to1_9_3.Protocol1_10To1_9_3;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityType;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_10;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_11;\nimport com.viaversion.viaversion.api.minecraft.entitydata.EntityData;\nimport com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1_9;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\nimport java.util.List;\n\npublic class EntityPacketRewriter1_10 extends LegacyEntityRewriter {\n\n public EntityPacketRewriter1_10(Protocol1_10To1_9_3 protocol) {\n super(protocol);\n }\n\n @Override\n protected void registerPackets() {\n protocol.registerClientbound(ClientboundPackets1_9_3.ADD_ENTITY, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity id\n map(Types.UUID); // 1 - UUID\n map(Types.BYTE); // 2 - Type\n map(Types.DOUBLE); // 3 - x\n map(Types.DOUBLE); // 4 - y\n map(Types.DOUBLE); // 5 - z\n map(Types.BYTE); // 6 - Pitch\n map(Types.BYTE); // 7 - Yaw\n map(Types.INT); // 8 - data\n\n // Track Entity\n handler(getObjectTrackerHandler());\n handler(getObjectRewriter(EntityTypes1_11.ObjectType::findById));\n\n handler(protocol.getItemRewriter().getFallingBlockHandler());\n }\n });\n\n registerTracker(ClientboundPackets1_9_3.ADD_EXPERIENCE_ORB, EntityTypes1_10.EntityType.EXPERIENCE_ORB);\n registerTracker(ClientboundPackets1_9_3.ADD_GLOBAL_ENTITY, EntityTypes1_10.EntityType.LIGHTNING_BOLT);\n\n protocol.registerClientbound(ClientboundPackets1_9_3.ADD_MOB, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity id\n map(Types.UUID); // 1 - UUID\n map(Types.UNSIGNED_BYTE); // 2 - Entity Type\n map(Types.DOUBLE); // 3 - X\n map(Types.DOUBLE); // 4 - Y\n map(Types.DOUBLE); // 5 - Z\n map(Types.BYTE); // 6 - Yaw\n map(Types.BYTE); // 7 - Pitch\n map(Types.BYTE); // 8 - Head Pitch\n map(Types.SHORT); // 9 - Velocity X\n map(Types.SHORT); // 10 - Velocity Y\n map(Types.SHORT); // 11 - Velocity Z\n map(Types.ENTITY_DATA_LIST1_9); // 12 - Entity data\n\n // Track entity\n handler(getTrackerHandler(Types.UNSIGNED_BYTE, 0));\n\n // Rewrite entity type / data\n handler(wrapper -> {\n int entityId = wrapper.get(Types.VAR_INT, 0);\n EntityType type = tracker(wrapper.user()).entityType(entityId);\n if (type == null) {\n return;\n }\n\n List entityDataList = wrapper.get(Types.ENTITY_DATA_LIST1_9, 0);\n handleEntityData(wrapper.get(Types.VAR_INT, 0), entityDataList, wrapper.user());\n\n EntityReplacement entityReplacement = entityDataForType(type);\n if (entityReplacement != null) {\n WrappedEntityData storage = new WrappedEntityData(entityDataList);\n wrapper.set(Types.UNSIGNED_BYTE, 0, (short) entityReplacement.replacementId());\n if (entityReplacement.hasBaseData())\n entityReplacement.defaultData().createData(storage);\n }\n });\n\n }\n });\n\n registerTracker(ClientboundPackets1_9_3.ADD_PAINTING, EntityTypes1_10.EntityType.PAINTING);\n registerJoinGame(ClientboundPackets1_9_3.LOGIN, EntityTypes1_10.EntityType.PLAYER);\n registerRespawn(ClientboundPackets1_9_3.RESPAWN);\n\n protocol.registerClientbound(ClientboundPackets1_9_3.ADD_PLAYER, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity ID\n map(Types.UUID); // 1 - Player UUID\n map(Types.DOUBLE); // 2 - X\n map(Types.DOUBLE); // 3 - Y\n map(Types.DOUBLE); // 4 - Z\n map(Types.BYTE); // 5 - Yaw\n map(Types.BYTE); // 6 - Pitch\n map(Types.ENTITY_DATA_LIST1_9); // 7 - Entity data list\n\n handler(getTrackerAndDataHandler(Types.ENTITY_DATA_LIST1_9, EntityTypes1_11.EntityType.PLAYER));\n }\n });\n\n registerRemoveEntities(ClientboundPackets1_9_3.REMOVE_ENTITIES);\n registerSetEntityData(ClientboundPackets1_9_3.SET_ENTITY_DATA, Types.ENTITY_DATA_LIST1_9);\n }\n\n @Override\n protected void registerRewrites() {\n mapEntityTypeWithData(EntityTypes1_10.EntityType.POLAR_BEAR, EntityTypes1_10.EntityType.SHEEP).plainName();\n\n // Change the sheep color when the polar bear is standing up (index 13 -> Standing up)\n filter().type(EntityTypes1_10.EntityType.POLAR_BEAR).index(13).handler((event, data) -> {\n boolean b = (boolean) data.getValue();\n\n data.setTypeAndValue(EntityDataTypes1_9.BYTE, b ? (byte) (14 & 0x0F) : (byte) (0));\n });\n\n\n // Handle husk (index 13 -> Zombie Type)\n filter().type(EntityTypes1_10.EntityType.ZOMBIE).index(13).handler((event, data) -> {\n if ((int) data.getValue() == 6) { // Is type Husk\n data.setValue(0);\n }\n });\n\n // Handle Stray (index 12 -> Skeleton Type)\n filter().type(EntityTypes1_10.EntityType.SKELETON).index(12).handler((event, data) -> {\n if ((int) data.getValue() == 2) {\n data.setValue(0); // Change to default skeleton\n }\n });\n\n // Added index from incorrect entity data hierarchy, where potions add to item entities\n filter().type(EntityTypes1_10.EntityType.POTION).addIndex(6);\n\n // Handle the missing NoGravity tag for every entity data\n filter().removeIndex(5);\n }\n\n @Override\n public EntityType typeFromId(int typeId) {\n return EntityTypes1_10.EntityType.findById(typeId);\n }\n\n @Override\n public EntityType objectTypeFromId(int typeId, int data) {\n return EntityTypes1_10.ObjectType.getEntityType(typeId, data);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_11_1to1_11/Protocol1_11_1To1_11.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_11_1to1_11;\n\nimport com.viaversion.viabackwards.api.BackwardsProtocol;\nimport com.viaversion.viabackwards.protocol.v1_11_1to1_11.rewriter.EntityPacketRewriter1_11_1;\nimport com.viaversion.viabackwards.protocol.v1_11_1to1_11.rewriter.ItemPacketRewriter1_11_1;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.minecraft.ClientWorld;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_11;\nimport com.viaversion.viaversion.data.entity.EntityTrackerBase;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;\n\npublic class Protocol1_11_1To1_11 extends BackwardsProtocol {\n\n private final EntityPacketRewriter1_11_1 entityRewriter = new EntityPacketRewriter1_11_1(this);\n private final ItemPacketRewriter1_11_1 itemRewriter = new ItemPacketRewriter1_11_1(this);\n\n public Protocol1_11_1To1_11() {\n super(ClientboundPackets1_9_3.class, ClientboundPackets1_9_3.class, ServerboundPackets1_9_3.class, ServerboundPackets1_9_3.class);\n }\n\n @Override\n public void init(UserConnection user) {\n user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_11.EntityType.PLAYER));\n user.addClientWorld(this.getClass(), new ClientWorld());\n }\n\n @Override\n public EntityPacketRewriter1_11_1 getEntityRewriter() {\n return entityRewriter;\n }\n\n @Override\n public ItemPacketRewriter1_11_1 getItemRewriter() {\n return itemRewriter;\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_11_1to1_11/rewriter/EntityPacketRewriter1_11_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_11_1to1_11.rewriter;\n\nimport com.viaversion.viabackwards.api.rewriters.LegacyEntityRewriter;\nimport com.viaversion.viabackwards.protocol.v1_11_1to1_11.Protocol1_11_1To1_11;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityType;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_11;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\n\npublic class EntityPacketRewriter1_11_1 extends LegacyEntityRewriter {\n\n public EntityPacketRewriter1_11_1(Protocol1_11_1To1_11 protocol) {\n super(protocol);\n }\n\n @Override\n protected void registerPackets() {\n protocol.registerClientbound(ClientboundPackets1_9_3.ADD_ENTITY, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity id\n map(Types.UUID); // 1 - UUID\n map(Types.BYTE); // 2 - Type\n map(Types.DOUBLE); // 3 - x\n map(Types.DOUBLE); // 4 - y\n map(Types.DOUBLE); // 5 - z\n map(Types.BYTE); // 6 - Pitch\n map(Types.BYTE); // 7 - Yaw\n map(Types.INT); // 8 - data\n\n // Track Entity\n handler(getObjectTrackerHandler());\n handler(getObjectRewriter(EntityTypes1_11.ObjectType::findById));\n }\n });\n\n registerTracker(ClientboundPackets1_9_3.ADD_EXPERIENCE_ORB, EntityTypes1_11.EntityType.EXPERIENCE_ORB);\n registerTracker(ClientboundPackets1_9_3.ADD_GLOBAL_ENTITY, EntityTypes1_11.EntityType.LIGHTNING_BOLT);\n\n protocol.registerClientbound(ClientboundPackets1_9_3.ADD_MOB, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity id\n map(Types.UUID); // 1 - UUID\n map(Types.VAR_INT); // 2 - Entity Type\n map(Types.DOUBLE); // 3 - X\n map(Types.DOUBLE); // 4 - Y\n map(Types.DOUBLE); // 5 - Z\n map(Types.BYTE); // 6 - Yaw\n map(Types.BYTE); // 7 - Pitch\n map(Types.BYTE); // 8 - Head Pitch\n map(Types.SHORT); // 9 - Velocity X\n map(Types.SHORT); // 10 - Velocity Y\n map(Types.SHORT); // 11 - Velocity Z\n map(Types.ENTITY_DATA_LIST1_9); // 12 - Entity data\n\n // Track entity\n handler(getTrackerHandler());\n\n // Rewrite entity type / data\n handler(getMobSpawnRewriter1_11(Types.ENTITY_DATA_LIST1_9));\n }\n });\n\n registerTracker(ClientboundPackets1_9_3.ADD_PAINTING, EntityTypes1_11.EntityType.PAINTING);\n registerJoinGame(ClientboundPackets1_9_3.LOGIN, EntityTypes1_11.EntityType.PLAYER);\n registerRespawn(ClientboundPackets1_9_3.RESPAWN);\n\n protocol.registerClientbound(ClientboundPackets1_9_3.ADD_PLAYER, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity ID\n map(Types.UUID); // 1 - Player UUID\n map(Types.DOUBLE); // 2 - X\n map(Types.DOUBLE); // 3 - Y\n map(Types.DOUBLE); // 4 - Z\n map(Types.BYTE); // 5 - Yaw\n map(Types.BYTE); // 6 - Pitch\n map(Types.ENTITY_DATA_LIST1_9); // 7 - Entity data list\n\n handler(getTrackerAndDataHandler(Types.ENTITY_DATA_LIST1_9, EntityTypes1_11.EntityType.PLAYER));\n }\n });\n\n registerRemoveEntities(ClientboundPackets1_9_3.REMOVE_ENTITIES);\n registerSetEntityData(ClientboundPackets1_9_3.SET_ENTITY_DATA, Types.ENTITY_DATA_LIST1_9);\n }\n\n @Override\n protected void registerRewrites() {\n // Handle non-existing firework entity data (index 7 entity id for boosting)\n filter().type(EntityTypes1_11.EntityType.FIREWORK_ROCKET).cancel(7);\n\n // Handle non-existing pig entity data (index 14 - boost time)\n filter().type(EntityTypes1_11.EntityType.PIG).cancel(14);\n }\n\n @Override\n public EntityType typeFromId(int typeId) {\n return EntityTypes1_11.EntityType.findById(typeId);\n }\n\n @Override\n public EntityType objectTypeFromId(int typeId, int data) {\n return EntityTypes1_11.ObjectType.getEntityType(typeId, data);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_11_1to1_11/rewriter/ItemPacketRewriter1_11_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_11_1to1_11.rewriter;\n\nimport com.viaversion.viabackwards.api.rewriters.LegacyBlockItemRewriter;\nimport com.viaversion.viabackwards.api.rewriters.LegacyEnchantmentRewriter;\nimport com.viaversion.viabackwards.protocol.v1_11_1to1_11.Protocol1_11_1To1_11;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.minecraft.item.Item;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;\n\npublic class ItemPacketRewriter1_11_1 extends LegacyBlockItemRewriter {\n\n private LegacyEnchantmentRewriter enchantmentRewriter;\n\n public ItemPacketRewriter1_11_1(Protocol1_11_1To1_11 protocol) {\n super(protocol, \"1.11.1\");\n }\n\n @Override\n protected void registerPackets() {\n registerSetSlot(ClientboundPackets1_9_3.CONTAINER_SET_SLOT);\n registerSetContent(ClientboundPackets1_9_3.CONTAINER_SET_CONTENT);\n registerSetEquippedItem(ClientboundPackets1_9_3.SET_EQUIPPED_ITEM);\n registerCustomPayloadTradeList(ClientboundPackets1_9_3.CUSTOM_PAYLOAD);\n\n registerContainerClick(ServerboundPackets1_9_3.CONTAINER_CLICK);\n registerSetCreativeModeSlot(ServerboundPackets1_9_3.SET_CREATIVE_MODE_SLOT);\n\n // Handle item entity data\n protocol.getEntityRewriter().filter().handler((event, data) -> {\n if (data.dataType().type().equals(Types.ITEM1_8)) { // Is Item\n data.setValue(handleItemToClient(event.user(), (Item) data.getValue()));\n }\n });\n }\n\n @Override\n protected void registerRewrites() {\n enchantmentRewriter = new LegacyEnchantmentRewriter(nbtTagName());\n enchantmentRewriter.registerEnchantment(22, \"§7Sweeping Edge\");\n }\n\n @Override\n public Item handleItemToClient(UserConnection connection, Item item) {\n if (item == null) return null;\n super.handleItemToClient(connection, item);\n\n enchantmentRewriter.handleToClient(item);\n return item;\n }\n\n @Override\n public Item handleItemToServer(UserConnection connection, Item item) {\n if (item == null) return null;\n item = super.handleItemToServer(connection, item);\n\n enchantmentRewriter.handleToServer(item);\n return item;\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_11to1_10/Protocol1_11To1_10.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_11to1_10;\n\nimport com.viaversion.viabackwards.api.BackwardsProtocol;\nimport com.viaversion.viabackwards.api.data.BackwardsMappingData;\nimport com.viaversion.viabackwards.api.rewriters.text.JsonNBTComponentRewriter;\nimport com.viaversion.viabackwards.protocol.v1_11to1_10.rewriter.BlockItemPacketRewriter1_11;\nimport com.viaversion.viabackwards.protocol.v1_11to1_10.rewriter.EntityPacketRewriter1_11;\nimport com.viaversion.viabackwards.protocol.v1_11to1_10.rewriter.PlayerPacketRewriter1_11;\nimport com.viaversion.viabackwards.protocol.v1_11to1_10.storage.WindowTracker;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.minecraft.ClientWorld;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_11;\nimport com.viaversion.viaversion.data.entity.EntityTrackerBase;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;\nimport com.viaversion.viaversion.rewriter.text.ComponentRewriterBase;\n\npublic class Protocol1_11To1_10 extends BackwardsProtocol {\n\n public static final BackwardsMappingData MAPPINGS = new BackwardsMappingData(\"1.11\", \"1.10\");\n private final EntityPacketRewriter1_11 entityRewriter = new EntityPacketRewriter1_11(this);\n private final BlockItemPacketRewriter1_11 itemRewriter = new BlockItemPacketRewriter1_11(this);\n private JsonNBTComponentRewriter componentRewriter;\n\n public Protocol1_11To1_10() {\n super(ClientboundPackets1_9_3.class, ClientboundPackets1_9_3.class, ServerboundPackets1_9_3.class, ServerboundPackets1_9_3.class);\n }\n\n @Override\n protected void registerPackets() {\n entityRewriter.register();\n itemRewriter.register();\n PlayerPacketRewriter1_11.register(this);\n\n componentRewriter = new JsonNBTComponentRewriter<>(this, ComponentRewriterBase.ReadType.JSON);\n componentRewriter.registerComponentPacket(ClientboundPackets1_9_3.CHAT);\n }\n\n @Override\n public void init(UserConnection user) {\n user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_11.EntityType.PLAYER));\n user.addClientWorld(this.getClass(), new ClientWorld());\n\n if (!user.has(WindowTracker.class)) {\n user.put(new WindowTracker());\n }\n }\n\n @Override\n public BackwardsMappingData getMappingData() {\n return MAPPINGS;\n }\n\n @Override\n public EntityPacketRewriter1_11 getEntityRewriter() {\n return entityRewriter;\n }\n\n @Override\n public BlockItemPacketRewriter1_11 getItemRewriter() {\n return itemRewriter;\n }\n\n @Override\n public JsonNBTComponentRewriter getComponentRewriter() {\n return componentRewriter;\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_11to1_10/data/SplashPotionMappings1_10.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_11to1_10.data;\n\nimport com.viaversion.viaversion.libs.fastutil.ints.Int2IntMap;\nimport com.viaversion.viaversion.libs.fastutil.ints.Int2IntOpenHashMap;\n\npublic class SplashPotionMappings1_10 {\n\n private static final Int2IntMap DATA = new Int2IntOpenHashMap(14, 0.99F);\n\n static {\n DATA.defaultReturnValue(-1);\n DATA.put(2039713, 5); // night vision\n DATA.put(8356754, 7); // invisibility\n DATA.put(2293580, 9); // jump boost\n DATA.put(14981690, 12); // fire resistance\n DATA.put(8171462, 14); // swiftness\n DATA.put(5926017, 17); // slowness\n DATA.put(3035801, 19); // water breathing\n DATA.put(16262179, 21); // instant health\n DATA.put(4393481, 23); // instant damage\n DATA.put(5149489, 25); // poison\n DATA.put(13458603, 28); // regeneration\n DATA.put(9643043, 31); // strength\n DATA.put(4738376, 34); // weakness\n DATA.put(3381504, 36); // luck\n }\n\n public static int getOldData(int data) {\n return DATA.get(data);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_11to1_10/rewriter/BlockItemPacketRewriter1_11.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_11to1_10.rewriter;\n\nimport com.viaversion.nbt.tag.CompoundTag;\nimport com.viaversion.nbt.tag.StringTag;\nimport com.viaversion.viabackwards.api.data.MappedLegacyBlockItem;\nimport com.viaversion.viabackwards.api.rewriters.LegacyBlockItemRewriter;\nimport com.viaversion.viabackwards.api.rewriters.LegacyEnchantmentRewriter;\nimport com.viaversion.viabackwards.protocol.v1_11to1_10.Protocol1_11To1_10;\nimport com.viaversion.viabackwards.protocol.v1_11to1_10.storage.ChestedHorseStorage;\nimport com.viaversion.viabackwards.protocol.v1_11to1_10.storage.WindowTracker;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.data.entity.EntityTracker;\nimport com.viaversion.viaversion.api.data.entity.StoredEntityData;\nimport com.viaversion.viaversion.api.minecraft.ClientWorld;\nimport com.viaversion.viaversion.api.minecraft.chunks.Chunk;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_11;\nimport com.viaversion.viaversion.api.minecraft.item.DataItem;\nimport com.viaversion.viaversion.api.minecraft.item.Item;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.api.type.types.chunk.ChunkType1_9_3;\nimport com.viaversion.viaversion.protocols.v1_10to1_11.data.EntityMappings1_11;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;\nimport com.viaversion.viaversion.util.IdAndData;\nimport java.util.Arrays;\nimport java.util.Optional;\n\npublic class BlockItemPacketRewriter1_11 extends LegacyBlockItemRewriter {\n\n private LegacyEnchantmentRewriter enchantmentRewriter;\n\n public BlockItemPacketRewriter1_11(Protocol1_11To1_10 protocol) {\n super(protocol, \"1.11\");\n }\n\n @Override\n protected void registerPackets() {\n registerBlockChange(ClientboundPackets1_9_3.BLOCK_UPDATE);\n registerMultiBlockChange(ClientboundPackets1_9_3.CHUNK_BLOCKS_UPDATE);\n\n protocol.registerClientbound(ClientboundPackets1_9_3.CONTAINER_SET_SLOT, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.BYTE); // 0 - Window ID\n map(Types.SHORT); // 1 - Slot ID\n map(Types.ITEM1_8); // 2 - Slot Value\n\n handler(wrapper -> handleItemToClient(wrapper.user(), wrapper.get(Types.ITEM1_8, 0)));\n\n // Handle Llama\n handler(wrapper -> {\n if (isLlama(wrapper.user())) {\n Optional horse = getChestedHorse(wrapper.user());\n if (horse.isEmpty()) {\n return;\n }\n\n ChestedHorseStorage storage = horse.get();\n int currentSlot = wrapper.get(Types.SHORT, 0);\n wrapper.set(Types.SHORT, 0, ((Integer) (currentSlot = getNewSlotId(storage, currentSlot))).shortValue());\n wrapper.set(Types.ITEM1_8, 0, getNewItem(storage, currentSlot, wrapper.get(Types.ITEM1_8, 0)));\n }\n });\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_9_3.CONTAINER_SET_CONTENT, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.UNSIGNED_BYTE); // 0 - Window ID\n map(Types.ITEM1_8_SHORT_ARRAY); // 1 - Window Values\n\n handler(wrapper -> {\n Item[] stacks = wrapper.get(Types.ITEM1_8_SHORT_ARRAY, 0);\n for (int i = 0; i < stacks.length; i++)\n stacks[i] = handleItemToClient(wrapper.user(), stacks[i]);\n\n if (isLlama(wrapper.user())) {\n Optional horse = getChestedHorse(wrapper.user());\n if (horse.isEmpty()) {\n return;\n }\n ChestedHorseStorage storage = horse.get();\n stacks = Arrays.copyOf(stacks, !storage.isChested() ? 38 : 53);\n\n for (int i = stacks.length - 1; i >= 0; i--) {\n stacks[getNewSlotId(storage, i)] = stacks[i];\n stacks[i] = getNewItem(storage, i, stacks[i]);\n }\n wrapper.set(Types.ITEM1_8_SHORT_ARRAY, 0, stacks);\n }\n });\n }\n });\n\n registerSetEquippedItem(ClientboundPackets1_9_3.SET_EQUIPPED_ITEM);\n registerCustomPayloadTradeList(ClientboundPackets1_9_3.CUSTOM_PAYLOAD);\n\n protocol.registerServerbound(ServerboundPackets1_9_3.CONTAINER_CLICK, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.BYTE); // 0 - Window ID\n map(Types.SHORT); // 1 - Slot\n map(Types.BYTE); // 2 - Button\n map(Types.SHORT); // 3 - Action number\n map(Types.VAR_INT); // 4 - Mode\n map(Types.ITEM1_8); // 5 - Clicked Item\n\n handler(wrapper -> handleItemToServer(wrapper.user(), wrapper.get(Types.ITEM1_8, 0)));\n\n // Llama slot\n handler(wrapper -> {\n if (isLlama(wrapper.user())) {\n Optional horse = getChestedHorse(wrapper.user());\n if (horse.isEmpty()) {\n return;\n }\n ChestedHorseStorage storage = horse.get();\n int clickSlot = wrapper.get(Types.SHORT, 0);\n int correctSlot = getOldSlotId(storage, clickSlot);\n\n wrapper.set(Types.SHORT, 0, ((Integer) correctSlot).shortValue());\n }\n });\n }\n });\n\n registerSetCreativeModeSlot(ServerboundPackets1_9_3.SET_CREATIVE_MODE_SLOT);\n\n protocol.registerClientbound(ClientboundPackets1_9_3.LEVEL_CHUNK, wrapper -> {\n ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_11To1_10.class);\n\n ChunkType1_9_3 type = ChunkType1_9_3.forEnvironment(clientWorld.getEnvironment()); // Use the 1.10 Chunk type since nothing changed.\n Chunk chunk = wrapper.passthrough(type);\n\n handleChunk(chunk);\n\n // only patch it for signs for now\n for (CompoundTag tag : chunk.getBlockEntities()) {\n StringTag idTag = tag.getStringTag(\"id\");\n if (idTag == null) continue;\n\n String id = idTag.getValue();\n if (id.equals(\"minecraft:sign\")) {\n idTag.setValue(\"Sign\");\n }\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_9_3.BLOCK_ENTITY_DATA, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.BLOCK_POSITION1_8); // 0 - Position\n map(Types.UNSIGNED_BYTE); // 1 - Action\n map(Types.NAMED_COMPOUND_TAG); // 2 - NBT\n\n handler(wrapper -> {\n // Remove on shulkerbox decleration\n if (wrapper.get(Types.UNSIGNED_BYTE, 0) == 10) {\n wrapper.cancel();\n }\n // Handler Spawners\n if (wrapper.get(Types.UNSIGNED_BYTE, 0) == 1) {\n CompoundTag tag = wrapper.get(Types.NAMED_COMPOUND_TAG, 0);\n EntityMappings1_11.toClientSpawner(tag, true);\n }\n });\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_9_3.OPEN_SCREEN, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.UNSIGNED_BYTE); // 0 - Window ID\n map(Types.STRING); // 1 - Window Type\n map(Types.COMPONENT); // 2 - Title\n map(Types.UNSIGNED_BYTE); // 3 - Slots\n\n handler(wrapper -> {\n int entityId = -1;\n // Passthrough Entity ID\n if (wrapper.get(Types.STRING, 0).equals(\"EntityHorse\")) {\n entityId = wrapper.passthrough(Types.INT);\n }\n // Rewrite window title\n protocol.getComponentRewriter().processText(wrapper.user(), wrapper.get(Types.COMPONENT, 0));\n\n // Track Inventory\n String inventory = wrapper.get(Types.STRING, 0);\n WindowTracker windowTracker = wrapper.user().get(WindowTracker.class);\n windowTracker.setInventory(inventory);\n windowTracker.setEntityId(entityId);\n\n // Change llama slotcount to the donkey one\n if (isLlama(wrapper.user())) {\n wrapper.set(Types.UNSIGNED_BYTE, 1, (short) 17);\n }\n });\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_9_3.CONTAINER_CLOSE, new PacketHandlers() {\n @Override\n public void register() {\n // Inventory tracking\n handler(wrapper -> {\n WindowTracker windowTracker = wrapper.user().get(WindowTracker.class);\n windowTracker.setInventory(null);\n windowTracker.setEntityId(-1);\n });\n }\n });\n\n\n protocol.registerServerbound(ServerboundPackets1_9_3.CONTAINER_CLOSE, new PacketHandlers() {\n @Override\n public void register() {\n // Inventory tracking\n handler(wrapper -> {\n WindowTracker windowTracker = wrapper.user().get(WindowTracker.class);\n windowTracker.setInventory(null);\n windowTracker.setEntityId(-1);\n });\n }\n });\n\n protocol.getEntityRewriter().filter().handler((event, data) -> {\n if (data.dataType().type().equals(Types.ITEM1_8)) // Is Item\n data.setValue(handleItemToClient(event.user(), (Item) data.getValue()));\n });\n }\n\n @Override\n protected void registerRewrites() {\n // Handle spawner block entity (map to itself with custom handler)\n MappedLegacyBlockItem data = itemReplacements.computeIfAbsent(IdAndData.toRawData(52), s -> new MappedLegacyBlockItem(52));\n data.setBlockEntityHandler((b, tag) -> EntityMappings1_11.toClientSpawner(tag, true));\n\n enchantmentRewriter = new LegacyEnchantmentRewriter(nbtTagName());\n enchantmentRewriter.registerEnchantment(71, \"§cCurse of Vanishing\");\n enchantmentRewriter.registerEnchantment(10, \"§cCurse of Binding\");\n\n enchantmentRewriter.setHideLevelForEnchants(71, 10); // Curses do not display their level\n }\n\n @Override\n public Item handleItemToClient(UserConnection connection, Item item) {\n if (item == null) return null;\n super.handleItemToClient(connection, item);\n\n CompoundTag tag = item.tag();\n if (tag == null) return item;\n\n // Rewrite spawn eggs (id checks are done in the method itself)\n EntityMappings1_11.toClientItem(item, true);\n\n enchantmentRewriter.handleToClient(item);\n return item;\n }\n\n @Override\n public Item handleItemToServer(UserConnection connection, Item item) {\n if (item == null) return null;\n item = super.handleItemToServer(connection, item);\n\n CompoundTag tag = item.tag();\n if (tag == null) return item;\n\n // Rewrite spawn eggs (id checks are done in the method itself)\n EntityMappings1_11.toServerItem(item, true);\n\n enchantmentRewriter.handleToServer(item);\n return item;\n }\n\n private boolean isLlama(UserConnection user) {\n WindowTracker tracker = user.get(WindowTracker.class);\n if (tracker.getInventory() != null && tracker.getInventory().equals(\"EntityHorse\")) {\n EntityTracker entTracker = user.getEntityTracker(Protocol1_11To1_10.class);\n StoredEntityData entityData = entTracker.entityData(tracker.getEntityId());\n return entityData != null && entityData.type().is(EntityTypes1_11.EntityType.LLAMA);\n }\n return false;\n }\n\n private Optional getChestedHorse(UserConnection user) {\n WindowTracker tracker = user.get(WindowTracker.class);\n if (tracker.getInventory() != null && tracker.getInventory().equals(\"EntityHorse\")) {\n EntityTracker entTracker = user.getEntityTracker(Protocol1_11To1_10.class);\n StoredEntityData entityData = entTracker.entityData(tracker.getEntityId());\n if (entityData != null)\n return Optional.of(entityData.get(ChestedHorseStorage.class));\n }\n return Optional.empty();\n }\n\n private int getNewSlotId(ChestedHorseStorage storage, int slotId) {\n int totalSlots = !storage.isChested() ? 38 : 53;\n int strength = storage.isChested() ? storage.getLiamaStrength() : 0;\n int startNonExistingFormula = 2 + 3 * strength;\n int offsetForm = 15 - (3 * strength);\n\n if (slotId >= startNonExistingFormula && totalSlots > (slotId + offsetForm))\n return offsetForm + slotId;\n if (slotId == 1)\n return 0;\n return slotId;\n }\n\n private int getOldSlotId(ChestedHorseStorage storage, int slotId) {\n int strength = storage.isChested() ? storage.getLiamaStrength() : 0;\n int startNonExistingFormula = 2 + 3 * strength;\n int endNonExistingFormula = 2 + 3 * (storage.isChested() ? 5 : 0);\n int offsetForm = endNonExistingFormula - startNonExistingFormula;\n\n if (slotId == 1 || slotId >= startNonExistingFormula && slotId < endNonExistingFormula)\n return 0;\n if (slotId >= endNonExistingFormula)\n return slotId - offsetForm;\n if (slotId == 0)\n return 1;\n return slotId;\n }\n\n private Item getNewItem(ChestedHorseStorage storage, int slotId, Item current) {\n int strength = storage.isChested() ? storage.getLiamaStrength() : 0;\n int startNonExistingFormula = 2 + 3 * strength;\n int endNonExistingFormula = 2 + 3 * (storage.isChested() ? 5 : 0);\n\n if (slotId >= startNonExistingFormula && slotId < endNonExistingFormula)\n return new DataItem(166, (byte) 1, (short) 0, getNamedTag(\"§4SLOT DISABLED\"));\n if (slotId == 1)\n return null;\n return current;\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_11to1_10/rewriter/EntityPacketRewriter1_11.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_11to1_10.rewriter;\n\nimport com.viaversion.viabackwards.api.entities.storage.WrappedEntityData;\nimport com.viaversion.viabackwards.api.rewriters.LegacyEntityRewriter;\nimport com.viaversion.viabackwards.protocol.v1_11to1_10.Protocol1_11To1_10;\nimport com.viaversion.viabackwards.protocol.v1_11to1_10.data.SplashPotionMappings1_10;\nimport com.viaversion.viabackwards.protocol.v1_11to1_10.storage.ChestedHorseStorage;\nimport com.viaversion.viaversion.api.data.entity.StoredEntityData;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityType;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_11;\nimport com.viaversion.viaversion.api.minecraft.entitydata.EntityData;\nimport com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1_9;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\nimport java.util.List;\n\npublic class EntityPacketRewriter1_11 extends LegacyEntityRewriter {\n\n public EntityPacketRewriter1_11(Protocol1_11To1_10 protocol) {\n super(protocol);\n }\n\n @Override\n protected void registerPackets() {\n protocol.registerClientbound(ClientboundPackets1_9_3.LEVEL_EVENT, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.INT);\n map(Types.BLOCK_POSITION1_8);\n map(Types.INT);\n handler(wrapper -> {\n int type = wrapper.get(Types.INT, 0);\n if (type == 2002 || type == 2007) {\n // 2007 potion id doesn't exist in 1.10\n if (type == 2007) {\n wrapper.set(Types.INT, 0, 2002);\n }\n\n int mappedData = SplashPotionMappings1_10.getOldData(wrapper.get(Types.INT, 1));\n if (mappedData != -1) {\n wrapper.set(Types.INT, 1, mappedData);\n }\n }\n });\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_9_3.ADD_ENTITY, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity id\n map(Types.UUID); // 1 - UUID\n map(Types.BYTE); // 2 - Type\n map(Types.DOUBLE); // 3 - x\n map(Types.DOUBLE); // 4 - y\n map(Types.DOUBLE); // 5 - z\n map(Types.BYTE); // 6 - Pitch\n map(Types.BYTE); // 7 - Yaw\n map(Types.INT); // 8 - data\n\n // Track Entity\n handler(getObjectTrackerHandler());\n handler(getObjectRewriter(EntityTypes1_11.ObjectType::findById));\n\n handler(protocol.getItemRewriter().getFallingBlockHandler());\n }\n });\n\n registerTracker(ClientboundPackets1_9_3.ADD_EXPERIENCE_ORB, EntityTypes1_11.EntityType.EXPERIENCE_ORB);\n registerTracker(ClientboundPackets1_9_3.ADD_GLOBAL_ENTITY, EntityTypes1_11.EntityType.LIGHTNING_BOLT);\n\n protocol.registerClientbound(ClientboundPackets1_9_3.ADD_MOB, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity id\n map(Types.UUID); // 1 - UUID\n map(Types.VAR_INT, Types.UNSIGNED_BYTE); // 2 - Entity Type\n map(Types.DOUBLE); // 3 - X\n map(Types.DOUBLE); // 4 - Y\n map(Types.DOUBLE); // 5 - Z\n map(Types.BYTE); // 6 - Yaw\n map(Types.BYTE); // 7 - Pitch\n map(Types.BYTE); // 8 - Head Pitch\n map(Types.SHORT); // 9 - Velocity X\n map(Types.SHORT); // 10 - Velocity Y\n map(Types.SHORT); // 11 - Velocity Z\n map(Types.ENTITY_DATA_LIST1_9); // 12 - Entity data\n\n // Track entity\n handler(getTrackerHandler(Types.UNSIGNED_BYTE, 0));\n\n // Rewrite entity type / data\n handler(getMobSpawnRewriter(Types.ENTITY_DATA_LIST1_9));\n\n // Sub 1.11 clients will error if the list is empty\n handler(wrapper -> {\n List entityDataList = wrapper.get(Types.ENTITY_DATA_LIST1_9, 0);\n if (entityDataList.isEmpty()) {\n entityDataList.add(new EntityData(0, EntityDataTypes1_9.BYTE, (byte) 0));\n }\n });\n }\n });\n\n registerTracker(ClientboundPackets1_9_3.ADD_PAINTING, EntityTypes1_11.EntityType.PAINTING);\n registerJoinGame(ClientboundPackets1_9_3.LOGIN, EntityTypes1_11.EntityType.PLAYER);\n registerRespawn(ClientboundPackets1_9_3.RESPAWN);\n\n protocol.registerClientbound(ClientboundPackets1_9_3.ADD_PLAYER, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity ID\n map(Types.UUID); // 1 - Player UUID\n map(Types.DOUBLE); // 2 - X\n map(Types.DOUBLE); // 3 - Y\n map(Types.DOUBLE); // 4 - Z\n map(Types.BYTE); // 5 - Yaw\n map(Types.BYTE); // 6 - Pitch\n map(Types.ENTITY_DATA_LIST1_9); // 7 - Entity data list\n\n handler(getTrackerAndDataHandler(Types.ENTITY_DATA_LIST1_9, EntityTypes1_11.EntityType.PLAYER));\n handler(wrapper -> {\n // Sub 1.11 clients will cry if the list is empty\n List entityDataList = wrapper.get(Types.ENTITY_DATA_LIST1_9, 0);\n if (entityDataList.isEmpty()) {\n entityDataList.add(new EntityData(0, EntityDataTypes1_9.BYTE, (byte) 0));\n }\n });\n }\n });\n\n registerRemoveEntities(ClientboundPackets1_9_3.REMOVE_ENTITIES);\n registerSetEntityData(ClientboundPackets1_9_3.SET_ENTITY_DATA, Types.ENTITY_DATA_LIST1_9);\n\n protocol.registerClientbound(ClientboundPackets1_9_3.ENTITY_EVENT, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.INT); // 0 - Entity ID\n map(Types.BYTE); // 1 - Entity Status\n\n handler(wrapper -> {\n final int entityId = wrapper.get(Types.INT, 0);\n if (entityId != tracker(wrapper.user()).clientEntityId()) {\n // Entity events are sent for all players, but we only want to apply this for the self player\n return;\n }\n\n final byte entityStatus = wrapper.get(Types.BYTE, 0);\n if (entityStatus == 35) {\n // TODO spawn particles?\n wrapper.clearPacket();\n wrapper.setPacketType(ClientboundPackets1_9_3.GAME_EVENT);\n wrapper.write(Types.UNSIGNED_BYTE, (short) 10); // Play Elder Guardian animation\n wrapper.write(Types.FLOAT, 0F);\n }\n });\n }\n });\n }\n\n @Override\n protected void registerRewrites() {\n // Guardian\n mapEntityTypeWithData(EntityTypes1_11.EntityType.ELDER_GUARDIAN, EntityTypes1_11.EntityType.GUARDIAN);\n // Skeletons\n mapEntityTypeWithData(EntityTypes1_11.EntityType.WITHER_SKELETON, EntityTypes1_11.EntityType.SKELETON).spawnEntityData(storage -> storage.add(getSkeletonTypeData(1)));\n mapEntityTypeWithData(EntityTypes1_11.EntityType.STRAY, EntityTypes1_11.EntityType.SKELETON).plainName().spawnEntityData(storage -> storage.add(getSkeletonTypeData(2)));\n // Zombies\n mapEntityTypeWithData(EntityTypes1_11.EntityType.HUSK, EntityTypes1_11.EntityType.ZOMBIE).plainName().spawnEntityData(storage -> handleZombieType(storage, 6));\n mapEntityTypeWithData(EntityTypes1_11.EntityType.ZOMBIE_VILLAGER, EntityTypes1_11.EntityType.ZOMBIE).spawnEntityData(storage -> handleZombieType(storage, 1));\n // Horses\n mapEntityTypeWithData(EntityTypes1_11.EntityType.HORSE, EntityTypes1_11.EntityType.HORSE).spawnEntityData(storage -> storage.add(getHorseDataType(0))); // Nob able to ride the horse without having the EntityDataType sent.\n mapEntityTypeWithData(EntityTypes1_11.EntityType.DONKEY, EntityTypes1_11.EntityType.HORSE).spawnEntityData(storage -> storage.add(getHorseDataType(1)));\n mapEntityTypeWithData(EntityTypes1_11.EntityType.MULE, EntityTypes1_11.EntityType.HORSE).spawnEntityData(storage -> storage.add(getHorseDataType(2)));\n mapEntityTypeWithData(EntityTypes1_11.EntityType.SKELETON_HORSE, EntityTypes1_11.EntityType.HORSE).spawnEntityData(storage -> storage.add(getHorseDataType(4)));\n mapEntityTypeWithData(EntityTypes1_11.EntityType.ZOMBIE_HORSE, EntityTypes1_11.EntityType.HORSE).spawnEntityData(storage -> storage.add(getHorseDataType(3)));\n // New mobs\n mapEntityTypeWithData(EntityTypes1_11.EntityType.EVOKER_FANGS, EntityTypes1_11.EntityType.SHULKER);\n mapEntityTypeWithData(EntityTypes1_11.EntityType.EVOKER, EntityTypes1_11.EntityType.VILLAGER).plainName();\n mapEntityTypeWithData(EntityTypes1_11.EntityType.VEX, EntityTypes1_11.EntityType.BAT).plainName();\n mapEntityTypeWithData(EntityTypes1_11.EntityType.VINDICATOR, EntityTypes1_11.EntityType.VILLAGER).plainName().spawnEntityData(storage -> storage.add(new EntityData(13, EntityDataTypes1_9.VAR_INT, 4))); // Base Profession\n mapEntityTypeWithData(EntityTypes1_11.EntityType.LLAMA, EntityTypes1_11.EntityType.HORSE).plainName().spawnEntityData(storage -> storage.add(getHorseDataType(1)));\n mapEntityTypeWithData(EntityTypes1_11.EntityType.LLAMA_SPIT, EntityTypes1_11.EntityType.SNOWBALL);\n\n mapObjectType(EntityTypes1_11.ObjectType.LLAMA_SPIT, EntityTypes1_11.ObjectType.SNOWBALL, -1);\n // Replace with endertorchthingies\n mapObjectType(EntityTypes1_11.ObjectType.EVOKER_FANGS, EntityTypes1_11.ObjectType.FALLING_BLOCK, 198 | 1 << 12);\n\n // Handle ElderGuardian & target entity data\n filter().type(EntityTypes1_11.EntityType.GUARDIAN).index(12).handler((event, data) -> {\n boolean b = (boolean) data.getValue();\n int bitmask = b ? 0x02 : 0;\n\n if (event.entityType() == EntityTypes1_11.EntityType.ELDER_GUARDIAN) {\n bitmask |= 0x04;\n }\n\n data.setTypeAndValue(EntityDataTypes1_9.BYTE, (byte) bitmask);\n });\n\n // Handle skeleton swing\n filter().type(EntityTypes1_11.EntityType.ABSTRACT_SKELETON).index(12).toIndex(13);\n\n /*\n ZOMBIE CHANGES\n */\n filter().type(EntityTypes1_11.EntityType.ZOMBIE).handler((event, data) -> {\n switch (data.id()) {\n case 13 -> event.cancel();\n case 14 -> event.setIndex(15);\n case 15 -> event.setIndex(14);\n case 16 -> {\n // Profession\n event.setIndex(13);\n data.setValue(1 + (int) data.getValue());\n }\n }\n });\n\n // Handle Evocation Illager\n filter().type(EntityTypes1_11.EntityType.EVOKER).index(12).handler((event, data) -> {\n event.setIndex(13);\n data.setTypeAndValue(EntityDataTypes1_9.VAR_INT, ((Byte) data.getValue()).intValue()); // Change the profession for the states\n });\n\n // Handle Vex (Remove this field completely since the position is not updated correctly when idling for bats. Sad ):\n filter().type(EntityTypes1_11.EntityType.VEX).index(12).handler((event, data) -> {\n data.setValue((byte) 0x00);\n });\n\n // Handle VindicationIllager\n filter().type(EntityTypes1_11.EntityType.VINDICATOR).index(12).handler((event, data) -> {\n event.setIndex(13);\n data.setTypeAndValue(EntityDataTypes1_9.VAR_INT, ((Number) data.getValue()).intValue() == 1 ? 2 : 4);\n });\n\n /*\n HORSES\n */\n\n // Handle horse flags\n filter().type(EntityTypes1_11.EntityType.ABSTRACT_HORSE).index(13).handler((event, data) -> {\n StoredEntityData entityData = storedEntityData(event);\n byte b = (byte) data.getValue();\n if (entityData.has(ChestedHorseStorage.class) && entityData.get(ChestedHorseStorage.class).isChested()) {\n b |= 0x08; // Chested\n data.setValue(b);\n }\n });\n\n // Create chested horse storage\n filter().type(EntityTypes1_11.EntityType.CHESTED_HORSE).handler((event, data) -> {\n StoredEntityData entityData = storedEntityData(event);\n if (!entityData.has(ChestedHorseStorage.class)) {\n entityData.put(new ChestedHorseStorage());\n }\n });\n\n // Handle horse armor\n filter().type(EntityTypes1_11.EntityType.HORSE).index(16).toIndex(17);\n\n // Handle chested horse\n filter().type(EntityTypes1_11.EntityType.CHESTED_HORSE).index(15).handler((event, data) -> {\n StoredEntityData entityData = storedEntityData(event);\n ChestedHorseStorage storage = entityData.get(ChestedHorseStorage.class);\n boolean b = (boolean) data.getValue();\n storage.setChested(b);\n event.cancel();\n });\n\n // Get rid of Liama entity data\n filter().type(EntityTypes1_11.EntityType.LLAMA).handler((event, data) -> {\n StoredEntityData entityData = storedEntityData(event);\n ChestedHorseStorage storage = entityData.get(ChestedHorseStorage.class);\n\n int index = event.index();\n // Store them for later (:\n switch (index) {\n case 16 -> {\n storage.setLiamaStrength((int) data.getValue());\n event.cancel();\n }\n case 17 -> {\n storage.setLiamaCarpetColor((int) data.getValue());\n event.cancel();\n }\n case 18 -> {\n storage.setLiamaVariant((int) data.getValue());\n event.cancel();\n }\n }\n });\n\n // Handle Horse (Correct owner)\n filter().type(EntityTypes1_11.EntityType.ABSTRACT_HORSE).index(14).toIndex(16);\n\n // Handle villager - Change non-existing profession\n filter().type(EntityTypes1_11.EntityType.VILLAGER).index(13).handler((event, data) -> {\n if ((int) data.getValue() == 5) {\n data.setValue(0);\n }\n });\n\n // handle new Shulker color data\n filter().type(EntityTypes1_11.EntityType.SHULKER).cancel(15);\n }\n\n /*\n 0 - Skeleton\n 1 - Wither Skeleton\n 2 - Stray\n */\n\n private EntityData getSkeletonTypeData(int type) {\n return new EntityData(12, EntityDataTypes1_9.VAR_INT, type);\n }\n\n /*\n 0 - Zombie\n 1-5 - Villager with profession\n 6 - Husk\n */\n private EntityData getZombieTypeData(int type) {\n return new EntityData(13, EntityDataTypes1_9.VAR_INT, type);\n }\n\n private void handleZombieType(WrappedEntityData storage, int type) {\n EntityData meta = storage.get(13);\n if (meta == null) {\n storage.add(getZombieTypeData(type));\n }\n }\n\n /*\n Horse 0\n Donkey 1\n Mule 2\n Zombie horse 3\n Skeleton horse 4\n */\n private EntityData getHorseDataType(int type) {\n return new EntityData(14, EntityDataTypes1_9.VAR_INT, type);\n }\n\n @Override\n public EntityType typeFromId(int typeId) {\n return EntityTypes1_11.EntityType.findById(typeId);\n }\n\n @Override\n public EntityType objectTypeFromId(int typeId, int data) {\n return EntityTypes1_11.ObjectType.getEntityType(typeId, data);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_11to1_10/rewriter/PlayerPacketRewriter1_11.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_11to1_10.rewriter;\n\nimport com.viaversion.viabackwards.protocol.v1_11to1_10.Protocol1_11To1_10;\nimport com.viaversion.viaversion.api.protocol.packet.PacketWrapper;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.protocol.remapper.ValueTransformer;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.libs.gson.JsonElement;\nimport com.viaversion.viaversion.libs.gson.JsonObject;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;\nimport com.viaversion.viaversion.util.ComponentUtil;\n\npublic class PlayerPacketRewriter1_11 {\n private static final ValueTransformer TO_NEW_FLOAT = new ValueTransformer<>(Types.FLOAT) {\n @Override\n public Float transform(PacketWrapper wrapper, Short inputValue) {\n return inputValue / 16f;\n }\n };\n\n public static void register(Protocol1_11To1_10 protocol) {\n protocol.registerClientbound(ClientboundPackets1_9_3.SET_TITLES, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Action\n\n handler(wrapper -> {\n int action = wrapper.get(Types.VAR_INT, 0);\n\n if (action == 2) { // Handle the new ActionBar\n JsonElement message = wrapper.read(Types.COMPONENT);\n\n wrapper.clearPacket();\n wrapper.setPacketType(ClientboundPackets1_9_3.CHAT);\n\n // https://bugs.mojang.com/browse/MC-119145\n String legacy = ComponentUtil.jsonToLegacy(message);\n message = new JsonObject();\n message.getAsJsonObject().addProperty(\"text\", legacy);\n\n wrapper.write(Types.COMPONENT, message);\n wrapper.write(Types.BYTE, (byte) 2);\n } else if (action > 2) {\n wrapper.set(Types.VAR_INT, 0, action - 1); // Move everything one position down\n }\n });\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_9_3.TAKE_ITEM_ENTITY, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Collected entity id\n map(Types.VAR_INT); // 1 - Collector entity id\n\n handler(wrapper -> wrapper.read(Types.VAR_INT)); // Ignore item pickup count\n }\n });\n\n\n protocol.registerServerbound(ServerboundPackets1_9_3.USE_ITEM_ON, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.BLOCK_POSITION1_8); // 0 - Location\n map(Types.VAR_INT); // 1 - Face\n map(Types.VAR_INT); // 2 - Hand\n\n map(Types.UNSIGNED_BYTE, TO_NEW_FLOAT);\n map(Types.UNSIGNED_BYTE, TO_NEW_FLOAT);\n map(Types.UNSIGNED_BYTE, TO_NEW_FLOAT);\n }\n });\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_11to1_10/storage/ChestedHorseStorage.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_11to1_10.storage;\n\npublic class ChestedHorseStorage {\n private boolean chested;\n private int liamaStrength;\n private int liamaCarpetColor = -1;\n private int liamaVariant;\n\n public boolean isChested() {\n return chested;\n }\n\n public void setChested(boolean chested) {\n this.chested = chested;\n }\n\n public int getLiamaStrength() {\n return liamaStrength;\n }\n\n public void setLiamaStrength(int liamaStrength) {\n this.liamaStrength = liamaStrength;\n }\n\n public int getLiamaCarpetColor() {\n return liamaCarpetColor;\n }\n\n public void setLiamaCarpetColor(int liamaCarpetColor) {\n this.liamaCarpetColor = liamaCarpetColor;\n }\n\n public int getLiamaVariant() {\n return liamaVariant;\n }\n\n public void setLiamaVariant(int liamaVariant) {\n this.liamaVariant = liamaVariant;\n }\n\n @Override\n public String toString() {\n return \"ChestedHorseStorage{\" + \"chested=\" + chested + \", liamaStrength=\" + liamaStrength + \", liamaCarpetColor=\" + liamaCarpetColor + \", liamaVariant=\" + liamaVariant + '}';\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_11to1_10/storage/WindowTracker.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_11to1_10.storage;\n\nimport com.viaversion.viaversion.api.connection.StorableObject;\n\npublic class WindowTracker implements StorableObject {\n private String inventory;\n private int entityId = -1;\n\n public String getInventory() {\n return inventory;\n }\n\n public void setInventory(String inventory) {\n this.inventory = inventory;\n }\n\n public int getEntityId() {\n return entityId;\n }\n\n public void setEntityId(int entityId) {\n this.entityId = entityId;\n }\n\n @Override\n public String toString() {\n return \"WindowTracker{\" + \"inventory='\" + inventory + '\\'' + \", entityId=\" + entityId + '}';\n }\n}\n\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12_1to1_12/Protocol1_12_1To1_12.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_12_1to1_12;\n\nimport com.viaversion.viabackwards.api.BackwardsProtocol;\nimport com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ClientboundPackets1_12;\nimport com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ServerboundPackets1_12;\nimport com.viaversion.viaversion.protocols.v1_12to1_12_1.packet.ClientboundPackets1_12_1;\nimport com.viaversion.viaversion.protocols.v1_12to1_12_1.packet.ServerboundPackets1_12_1;\n\npublic class Protocol1_12_1To1_12 extends BackwardsProtocol {\n\n public Protocol1_12_1To1_12() {\n super(ClientboundPackets1_12_1.class, ClientboundPackets1_12.class, ServerboundPackets1_12_1.class, ServerboundPackets1_12.class);\n }\n\n @Override\n protected void registerPackets() {\n cancelClientbound(ClientboundPackets1_12_1.PLACE_GHOST_RECIPE);\n cancelServerbound(ServerboundPackets1_12.CRAFTING_RECIPE_PLACEMENT);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12_2to1_12_1/Protocol1_12_2To1_12_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_12_2to1_12_1;\n\nimport com.viaversion.viabackwards.api.BackwardsProtocol;\nimport com.viaversion.viabackwards.protocol.v1_12_2to1_12_1.storage.KeepAliveTracker;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_12to1_12_1.packet.ClientboundPackets1_12_1;\nimport com.viaversion.viaversion.protocols.v1_12to1_12_1.packet.ServerboundPackets1_12_1;\n\npublic class Protocol1_12_2To1_12_1 extends BackwardsProtocol {\n\n public Protocol1_12_2To1_12_1() {\n super(ClientboundPackets1_12_1.class, ClientboundPackets1_12_1.class, ServerboundPackets1_12_1.class, ServerboundPackets1_12_1.class);\n }\n\n @Override\n protected void registerPackets() {\n registerClientbound(ClientboundPackets1_12_1.KEEP_ALIVE, new PacketHandlers() {\n @Override\n public void register() {\n handler(packetWrapper -> {\n Long keepAlive = packetWrapper.read(Types.LONG);\n packetWrapper.user().get(KeepAliveTracker.class).setKeepAlive(keepAlive);\n packetWrapper.write(Types.VAR_INT, keepAlive.hashCode());\n });\n }\n });\n\n registerServerbound(ServerboundPackets1_12_1.KEEP_ALIVE, new PacketHandlers() {\n @Override\n public void register() {\n handler(packetWrapper -> {\n int keepAlive = packetWrapper.read(Types.VAR_INT);\n long realKeepAlive = packetWrapper.user().get(KeepAliveTracker.class).getKeepAlive();\n if (keepAlive != Long.hashCode(realKeepAlive)) {\n packetWrapper.cancel(); // Wrong data, cancel packet\n return;\n }\n packetWrapper.write(Types.LONG, realKeepAlive);\n // Reset KeepAliveTracker (to prevent sending same valid value in a row causing a timeout)\n packetWrapper.user().get(KeepAliveTracker.class).setKeepAlive(Integer.MAX_VALUE);\n });\n }\n });\n }\n\n @Override\n public void init(UserConnection userConnection) {\n userConnection.put(new KeepAliveTracker());\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12_2to1_12_1/storage/KeepAliveTracker.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_12_2to1_12_1.storage;\n\nimport com.viaversion.viaversion.api.connection.StorableObject;\n\npublic class KeepAliveTracker implements StorableObject {\n private long keepAlive = Integer.MAX_VALUE;\n\n public long getKeepAlive() {\n return keepAlive;\n }\n\n public void setKeepAlive(long keepAlive) {\n this.keepAlive = keepAlive;\n }\n\n @Override\n public String toString() {\n return \"KeepAliveTracker{\" + \"keepAlive=\" + keepAlive + '}';\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/Protocol1_12To1_11_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_12to1_11_1;\n\nimport com.viaversion.viabackwards.api.BackwardsProtocol;\nimport com.viaversion.viabackwards.api.data.BackwardsMappingData;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.rewriter.BlockItemPacketRewriter1_12;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.rewriter.ComponentRewriter1_12;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.rewriter.EntityPacketRewriter1_12;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.rewriter.SoundPacketRewriter1_12;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.storage.ShoulderTracker;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.minecraft.ClientWorld;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_12;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.data.entity.EntityTrackerBase;\nimport com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ClientboundPackets1_12;\nimport com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ServerboundPackets1_12;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;\nimport com.viaversion.viaversion.util.ComponentUtil;\nimport com.viaversion.viaversion.util.SerializerVersion;\n\npublic class Protocol1_12To1_11_1 extends BackwardsProtocol {\n\n private static final BackwardsMappingData MAPPINGS = new BackwardsMappingData(\"1.12\", \"1.11\");\n private final EntityPacketRewriter1_12 entityRewriter = new EntityPacketRewriter1_12(this);\n private final BlockItemPacketRewriter1_12 itemRewriter = new BlockItemPacketRewriter1_12(this);\n private final ComponentRewriter1_12 componentRewriter = new ComponentRewriter1_12(this);\n\n public Protocol1_12To1_11_1() {\n super(ClientboundPackets1_12.class, ClientboundPackets1_9_3.class, ServerboundPackets1_12.class, ServerboundPackets1_9_3.class);\n }\n\n @Override\n protected void registerPackets() {\n super.registerPackets();\n\n componentRewriter.registerComponentPacket(ClientboundPackets1_12.CHAT);\n new SoundPacketRewriter1_12(this).register();\n\n registerClientbound(ClientboundPackets1_12.SET_TITLES, wrapper -> {\n int action = wrapper.passthrough(Types.VAR_INT);\n if (action >= 0 && action <= 2) {\n // Should be done globally in the component rewriter, but /shrug for now\n String component = wrapper.read(Types.COMPONENT).toString();\n wrapper.write(Types.COMPONENT, ComponentUtil.convertJsonOrEmpty(component, SerializerVersion.V1_12, SerializerVersion.V1_9));\n }\n });\n\n cancelClientbound(ClientboundPackets1_12.UPDATE_ADVANCEMENTS);\n cancelClientbound(ClientboundPackets1_12.RECIPE);\n cancelClientbound(ClientboundPackets1_12.SELECT_ADVANCEMENTS_TAB);\n }\n\n @Override\n public void init(UserConnection user) {\n user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_12.EntityType.PLAYER));\n user.addClientWorld(this.getClass(), new ClientWorld());\n\n user.put(new ShoulderTracker(user));\n }\n\n @Override\n public BackwardsMappingData getMappingData() {\n return MAPPINGS;\n }\n\n @Override\n public EntityPacketRewriter1_12 getEntityRewriter() {\n return entityRewriter;\n }\n\n @Override\n public BlockItemPacketRewriter1_12 getItemRewriter() {\n return itemRewriter;\n }\n\n @Override\n public ComponentRewriter1_12 getComponentRewriter() {\n return componentRewriter;\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/data/BlockColors1_11_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_12to1_11_1.data;\n\npublic class BlockColors1_11_1 {\n private static final String[] COLORS = new String[16];\n\n static {\n COLORS[0] = \"White\";\n COLORS[1] = \"Orange\";\n COLORS[2] = \"Magenta\";\n COLORS[3] = \"Light Blue\";\n COLORS[4] = \"Yellow\";\n COLORS[5] = \"Lime\";\n COLORS[6] = \"Pink\";\n COLORS[7] = \"Gray\";\n COLORS[8] = \"Light Gray\";\n COLORS[9] = \"Cyan\";\n COLORS[10] = \"Purple\";\n COLORS[11] = \"Blue\";\n COLORS[12] = \"Brown\";\n COLORS[13] = \"Green\";\n COLORS[14] = \"Red\";\n COLORS[15] = \"Black\";\n }\n\n public static String get(int key) {\n return key >= 0 && key < COLORS.length ? COLORS[key] : \"Unknown color\";\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/data/MapColorMappings1_11_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_12to1_11_1.data;\n\nimport com.viaversion.viaversion.libs.fastutil.ints.Int2IntMap;\nimport com.viaversion.viaversion.libs.fastutil.ints.Int2IntOpenHashMap;\n\npublic class MapColorMappings1_11_1 {\n private static final Int2IntMap MAPPING = new Int2IntOpenHashMap(64, 0.99F);\n\n static {\n MAPPING.defaultReturnValue(-1);\n MAPPING.put(144, 59); // (148, 124, 114) -> (148, 124, 114)\n MAPPING.put(145, 56); // (180, 153, 139) -> (180, 153, 139)\n MAPPING.put(146, 56); // (209, 177, 161) -> (209, 177, 161)\n MAPPING.put(147, 45); // (111, 94, 85) -> (111, 94, 85)\n MAPPING.put(148, 63); // (112, 58, 25) -> (112, 58, 25)\n MAPPING.put(149, 60); // (137, 71, 31) -> (137, 71, 31)\n MAPPING.put(150, 60); // (159, 82, 36) -> (159, 82, 36)\n MAPPING.put(151, 136); // (84, 43, 19) -> (84, 43, 19)\n MAPPING.put(152, 83); // (105, 61, 76) -> (105, 61, 76)\n MAPPING.put(153, 83); // (129, 75, 93) -> (129, 75, 93)\n MAPPING.put(154, 80); // (149, 87, 108) -> (149, 87, 108)\n MAPPING.put(155, 115); // (79, 46, 57) -> (79, 46, 57)\n MAPPING.put(156, 39); // (79, 76, 97) -> (79, 76, 97)\n MAPPING.put(157, 39); // (97, 93, 119) -> (97, 93, 119)\n MAPPING.put(158, 36); // (112, 108, 138) -> (112, 108, 138)\n MAPPING.put(159, 47); // (59, 57, 73) -> (59, 57, 73)\n MAPPING.put(160, 60); // (131, 94, 25) -> (131, 94, 25)\n MAPPING.put(161, 61); // (160, 115, 31) -> (160, 115, 31)\n MAPPING.put(162, 62); // (186, 133, 36) -> (186, 133, 36)\n MAPPING.put(163, 137); // (98, 70, 19) -> (98, 70, 19)\n MAPPING.put(164, 108); // (73, 83, 37) -> (73, 83, 37)\n MAPPING.put(165, 108); // (89, 101, 46) -> (89, 101, 46)\n MAPPING.put(166, 109); // (103, 117, 53) -> (103, 117, 53)\n MAPPING.put(167, 111); // (55, 62, 28) -> (55, 62, 28)\n MAPPING.put(168, 112); // (113, 54, 55) -> (113, 54, 55)\n MAPPING.put(169, 113); // (138, 66, 67) -> (138, 66, 67)\n MAPPING.put(170, 114); // (160, 77, 78) -> (160, 77, 78)\n MAPPING.put(171, 115); // (85, 41, 41) -> (85, 41, 41)\n MAPPING.put(172, 118); // (40, 29, 25) -> (40, 29, 25)\n MAPPING.put(173, 107); // (49, 35, 30) -> (49, 35, 30)\n MAPPING.put(174, 107); // (57, 41, 35) -> (57, 41, 35)\n MAPPING.put(175, 118); // (30, 22, 19) -> (30, 22, 19)\n MAPPING.put(176, 91); // (95, 76, 69) -> (95, 76, 69)\n MAPPING.put(177, 45); // (116, 92, 85) -> (116, 92, 85)\n MAPPING.put(178, 46); // (135, 107, 98) -> (135, 107, 98)\n MAPPING.put(179, 47); // (71, 57, 52) -> (71, 57, 52)\n MAPPING.put(180, 85); // (61, 65, 65) -> (61, 65, 65)\n MAPPING.put(181, 44); // (75, 79, 79) -> (75, 79, 79)\n MAPPING.put(182, 27); // (87, 92, 92) -> (87, 92, 92)\n MAPPING.put(183, 84); // (46, 49, 49) -> (46, 49, 49)\n MAPPING.put(184, 83); // (86, 52, 62) -> (86, 52, 62)\n MAPPING.put(185, 83); // (105, 63, 76) -> (105, 63, 76)\n MAPPING.put(186, 83); // (122, 73, 88) -> (122, 73, 88)\n MAPPING.put(187, 84); // (65, 39, 47) -> (65, 39, 47)\n MAPPING.put(188, 84); // (54, 44, 65) -> (54, 44, 65)\n MAPPING.put(189, 71); // (66, 53, 79) -> (66, 53, 79)\n MAPPING.put(190, 71); // (76, 62, 92) -> (76, 62, 92)\n MAPPING.put(191, 87); // (40, 33, 49) -> (40, 33, 49)\n MAPPING.put(192, 107); // (54, 35, 25) -> (54, 35, 25)\n MAPPING.put(193, 139); // (66, 43, 30) -> (66, 43, 30)\n MAPPING.put(194, 43); // (76, 50, 35) -> (76, 50, 35)\n MAPPING.put(195, 107); // (40, 26, 19) -> (40, 26, 19)\n MAPPING.put(196, 111); // (54, 58, 30) -> (54, 58, 30)\n MAPPING.put(197, 111); // (66, 71, 36) -> (66, 71, 36)\n MAPPING.put(198, 111); // (76, 82, 42) -> (76, 82, 42)\n MAPPING.put(199, 107); // (40, 43, 22) -> (40, 43, 22)\n MAPPING.put(200, 112); // (100, 42, 32) -> (100, 42, 32)\n MAPPING.put(201, 113); // (123, 52, 40) -> (123, 52, 40)\n MAPPING.put(202, 113); // (142, 60, 46) -> (142, 60, 46)\n MAPPING.put(203, 115); // (75, 32, 24) -> (75, 32, 24)\n MAPPING.put(204, 116); // (26, 16, 11) -> (26, 16, 11)\n MAPPING.put(205, 117); // (32, 19, 14) -> (32, 19, 14)\n MAPPING.put(206, 107); // (37, 22, 16) -> (37, 22, 16)\n MAPPING.put(207, 119); // (20, 12, 8) -> (20, 12, 8)\n }\n\n public static int getNearestOldColor(int color) {\n return MAPPING.getOrDefault(color, color);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/rewriter/BlockItemPacketRewriter1_12.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_12to1_11_1.rewriter;\n\nimport com.viaversion.nbt.tag.CompoundTag;\nimport com.viaversion.nbt.tag.IntArrayTag;\nimport com.viaversion.nbt.tag.LongArrayTag;\nimport com.viaversion.nbt.tag.StringTag;\nimport com.viaversion.nbt.tag.Tag;\nimport com.viaversion.viabackwards.api.rewriters.LegacyBlockItemRewriter;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.Protocol1_12To1_11_1;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.data.MapColorMappings1_11_1;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.minecraft.ClientWorld;\nimport com.viaversion.viaversion.api.minecraft.chunks.Chunk;\nimport com.viaversion.viaversion.api.minecraft.item.Item;\nimport com.viaversion.viaversion.api.protocol.packet.PacketWrapper;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.api.type.types.chunk.ChunkType1_9_3;\nimport com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ClientboundPackets1_12;\nimport com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ServerboundPackets1_12;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;\nimport com.viaversion.viaversion.util.ComponentUtil;\nimport com.viaversion.viaversion.util.Key;\nimport com.viaversion.viaversion.util.SerializerVersion;\nimport java.util.Iterator;\nimport java.util.Map;\nimport org.checkerframework.checker.nullness.qual.Nullable;\n\npublic class BlockItemPacketRewriter1_12 extends LegacyBlockItemRewriter {\n\n public BlockItemPacketRewriter1_12(Protocol1_12To1_11_1 protocol) {\n super(protocol, \"1.12\");\n }\n\n @Override\n protected void registerPackets() {\n registerBlockChange(ClientboundPackets1_12.BLOCK_UPDATE);\n registerMultiBlockChange(ClientboundPackets1_12.CHUNK_BLOCKS_UPDATE);\n\n protocol.registerClientbound(ClientboundPackets1_12.MAP_ITEM_DATA, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT);\n map(Types.BYTE);\n map(Types.BOOLEAN);\n handler(wrapper -> {\n int count = wrapper.passthrough(Types.VAR_INT);\n for (int i = 0; i < count * 3; i++) {\n wrapper.passthrough(Types.BYTE);\n }\n });\n handler(wrapper -> {\n short columns = wrapper.passthrough(Types.UNSIGNED_BYTE);\n if (columns <= 0) return;\n\n wrapper.passthrough(Types.UNSIGNED_BYTE); // Rows\n wrapper.passthrough(Types.UNSIGNED_BYTE); // X\n wrapper.passthrough(Types.UNSIGNED_BYTE); // Z\n byte[] data = wrapper.read(Types.BYTE_ARRAY_PRIMITIVE);\n for (int i = 0; i < data.length; i++) {\n short color = (short) (data[i] & 0xFF);\n if (color > 143) {\n color = (short) MapColorMappings1_11_1.getNearestOldColor(color);\n data[i] = (byte) color;\n }\n }\n wrapper.write(Types.BYTE_ARRAY_PRIMITIVE, data);\n });\n }\n });\n\n registerSetSlot(ClientboundPackets1_12.CONTAINER_SET_SLOT);\n registerSetContent(ClientboundPackets1_12.CONTAINER_SET_CONTENT);\n registerSetEquippedItem(ClientboundPackets1_12.SET_EQUIPPED_ITEM);\n registerCustomPayloadTradeList(ClientboundPackets1_12.CUSTOM_PAYLOAD);\n\n protocol.registerServerbound(ServerboundPackets1_9_3.CONTAINER_CLICK, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.BYTE); // 0 - Window ID\n map(Types.SHORT); // 1 - Slot\n map(Types.BYTE); // 2 - Button\n map(Types.SHORT); // 3 - Action number\n map(Types.VAR_INT); // 4 - Mode\n map(Types.ITEM1_8); // 5 - Clicked Item\n\n handler(wrapper -> {\n if (wrapper.get(Types.VAR_INT, 0) == 1) { // Shift click\n // https://github.com/ViaVersion/ViaVersion/pull/754\n // Previously clients grab the item from the clicked slot *before* it has\n // been moved however now they grab the slot item *after* it has been moved\n // and send that in the packet.\n wrapper.set(Types.ITEM1_8, 0, null); // Set null item (probably will work)\n\n // Apologize (may happen in some cases, maybe if inventory is full?)\n PacketWrapper confirm = wrapper.create(ServerboundPackets1_12.CONTAINER_ACK);\n confirm.write(Types.BYTE, wrapper.get(Types.BYTE, 0));\n confirm.write(Types.SHORT, wrapper.get(Types.SHORT, 1));\n confirm.write(Types.BOOLEAN, true); // Success - not used\n\n wrapper.sendToServer(Protocol1_12To1_11_1.class);\n wrapper.cancel();\n confirm.sendToServer(Protocol1_12To1_11_1.class);\n return;\n\n }\n Item item = wrapper.get(Types.ITEM1_8, 0);\n handleItemToServer(wrapper.user(), item);\n });\n }\n });\n\n registerSetCreativeModeSlot(ServerboundPackets1_9_3.SET_CREATIVE_MODE_SLOT);\n\n protocol.registerClientbound(ClientboundPackets1_12.LEVEL_CHUNK, wrapper -> {\n ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_12To1_11_1.class);\n\n ChunkType1_9_3 type = ChunkType1_9_3.forEnvironment(clientWorld.getEnvironment()); // Use the 1.9.4 Chunk type since nothing changed.\n Chunk chunk = wrapper.passthrough(type);\n\n handleChunk(chunk);\n for (final CompoundTag tag : chunk.getBlockEntities()) {\n final String id = tag.getString(\"id\");\n if (id == null) {\n continue;\n }\n if (Key.stripMinecraftNamespace(id).equals(\"sign\")) {\n handleSignText(tag);\n }\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_12.BLOCK_ENTITY_DATA, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.BLOCK_POSITION1_8); // 0 - Position\n map(Types.UNSIGNED_BYTE); // 1 - Action\n map(Types.NAMED_COMPOUND_TAG); // 2 - NBT\n\n handler(wrapper -> {\n final short type = wrapper.get(Types.UNSIGNED_BYTE, 0);\n if (type == 9) {\n final CompoundTag tag = wrapper.get(Types.NAMED_COMPOUND_TAG, 0);\n handleSignText(tag);\n } else if (type == 11) {\n // Remove bed color\n wrapper.cancel();\n }\n });\n }\n });\n\n protocol.getEntityRewriter().filter().handler((event, data) -> {\n if (data.dataType().type().equals(Types.ITEM1_8)) // Is Item\n data.setValue(handleItemToClient(event.user(), (Item) data.getValue()));\n });\n\n protocol.registerServerbound(ServerboundPackets1_9_3.CLIENT_COMMAND, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // Action ID\n\n handler(wrapper -> {\n // Open Inventory\n if (wrapper.get(Types.VAR_INT, 0) == 2) {\n wrapper.cancel();\n }\n });\n }\n });\n }\n\n private void handleSignText(final CompoundTag tag) {\n // Push signs through component conversion, fixes https://github.com/ViaVersion/ViaBackwards/issues/835\n for (int i = 0; i < 4; i++) {\n final StringTag lineTag = tag.getStringTag(\"Text\" + (i + 1));\n if (lineTag == null) {\n continue;\n }\n\n lineTag.setValue(ComponentUtil.convertJsonOrEmpty(lineTag.getValue(), SerializerVersion.V1_12, SerializerVersion.V1_9).toString());\n }\n }\n\n @Override\n public @Nullable Item handleItemToClient(UserConnection connection, Item item) {\n if (item == null) return null;\n super.handleItemToClient(connection, item);\n\n if (item.tag() != null) {\n CompoundTag backupTag = new CompoundTag();\n if (handleNbtToClient(item.tag(), backupTag)) {\n item.tag().put(\"Via|LongArrayTags\", backupTag);\n }\n }\n\n return item;\n }\n\n private boolean handleNbtToClient(CompoundTag compoundTag, CompoundTag backupTag) {\n // Long array tags were introduced in 1.12 - just remove them\n // Only save the removed tags instead of blindly copying the entire nbt again\n Iterator> iterator = compoundTag.iterator();\n boolean hasLongArrayTag = false;\n while (iterator.hasNext()) {\n Map.Entry entry = iterator.next();\n if (entry.getValue() instanceof CompoundTag tag) {\n CompoundTag nestedBackupTag = new CompoundTag();\n backupTag.put(entry.getKey(), nestedBackupTag);\n hasLongArrayTag |= handleNbtToClient(tag, nestedBackupTag);\n } else if (entry.getValue() instanceof LongArrayTag tag) {\n backupTag.put(entry.getKey(), fromLongArrayTag(tag));\n iterator.remove();\n hasLongArrayTag = true;\n }\n }\n return hasLongArrayTag;\n }\n\n @Override\n public @Nullable Item handleItemToServer(UserConnection connection, Item item) {\n if (item == null) return null;\n item = super.handleItemToServer(connection, item);\n\n if (item.tag() != null) {\n if (item.tag().remove(\"Via|LongArrayTags\") instanceof CompoundTag tag) {\n handleNbtToServer(item.tag(), tag);\n }\n }\n\n return item;\n }\n\n private void handleNbtToServer(CompoundTag compoundTag, CompoundTag backupTag) {\n // Restore the removed long array tags\n for (Map.Entry entry : backupTag) {\n if (entry.getValue() instanceof CompoundTag) {\n CompoundTag nestedTag = compoundTag.getCompoundTag(entry.getKey());\n handleNbtToServer(nestedTag, (CompoundTag) entry.getValue());\n } else {\n compoundTag.put(entry.getKey(), fromIntArrayTag((IntArrayTag) entry.getValue()));\n }\n }\n }\n\n private IntArrayTag fromLongArrayTag(LongArrayTag tag) {\n int[] intArray = new int[tag.length() * 2];\n long[] longArray = tag.getValue();\n int i = 0;\n for (long l : longArray) {\n intArray[i++] = (int) (l >> 32);\n intArray[i++] = (int) l;\n }\n return new IntArrayTag(intArray);\n }\n\n private LongArrayTag fromIntArrayTag(IntArrayTag tag) {\n long[] longArray = new long[tag.length() / 2];\n int[] intArray = tag.getValue();\n for (int i = 0, j = 0; i < intArray.length; i += 2, j++) {\n longArray[j] = (long) intArray[i] << 32 | ((long) intArray[i + 1] & 0xFFFFFFFFL);\n }\n return new LongArrayTag(longArray);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/rewriter/ComponentRewriter1_12.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_12to1_11_1.rewriter;\n\nimport com.viaversion.viabackwards.api.rewriters.text.JsonNBTComponentRewriter;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.Protocol1_12To1_11_1;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.libs.gson.JsonElement;\nimport com.viaversion.viaversion.libs.gson.JsonObject;\nimport com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ClientboundPackets1_12;\nimport com.viaversion.viaversion.rewriter.text.ComponentRewriterBase;\n\npublic class ComponentRewriter1_12 extends JsonNBTComponentRewriter {\n\n public ComponentRewriter1_12(Protocol1_12To1_11_1 protocol) {\n super(protocol, ComponentRewriterBase.ReadType.JSON);\n }\n\n @Override\n public void processText(UserConnection connection, JsonElement element) {\n super.processText(connection, element);\n if (element == null || !element.isJsonObject()) {\n return;\n }\n\n JsonObject object = element.getAsJsonObject();\n JsonElement keybind = object.remove(\"keybind\");\n if (keybind == null) {\n return;\n }\n\n //TODO Add nicer text for the key, also use this component rewriter in more packets\n object.addProperty(\"text\", keybind.getAsString());\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/rewriter/EntityPacketRewriter1_12.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_12to1_11_1.rewriter;\n\nimport com.viaversion.nbt.tag.CompoundTag;\nimport com.viaversion.viabackwards.api.rewriters.LegacyEntityRewriter;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.Protocol1_12To1_11_1;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.storage.ParrotStorage;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.storage.ShoulderTracker;\nimport com.viaversion.viaversion.api.data.entity.StoredEntityData;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityType;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_12;\nimport com.viaversion.viaversion.api.minecraft.entitydata.EntityData;\nimport com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1_12;\nimport com.viaversion.viaversion.api.protocol.packet.PacketWrapper;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.libs.gson.JsonElement;\nimport com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ClientboundPackets1_12;\nimport com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;\n\npublic class EntityPacketRewriter1_12 extends LegacyEntityRewriter {\n\n public EntityPacketRewriter1_12(Protocol1_12To1_11_1 protocol) {\n super(protocol);\n }\n\n @Override\n protected void registerPackets() {\n protocol.registerClientbound(ClientboundPackets1_12.ADD_ENTITY, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity id\n map(Types.UUID); // 1 - UUID\n map(Types.BYTE); // 2 - Type\n map(Types.DOUBLE); // 3 - x\n map(Types.DOUBLE); // 4 - y\n map(Types.DOUBLE); // 5 - z\n map(Types.BYTE); // 6 - Pitch\n map(Types.BYTE); // 7 - Yaw\n map(Types.INT); // 8 - data\n\n // Track Entity\n handler(getObjectTrackerHandler());\n handler(getObjectRewriter(EntityTypes1_12.ObjectType::findById));\n\n handler(protocol.getItemRewriter().getFallingBlockHandler());\n }\n });\n\n registerTracker(ClientboundPackets1_12.ADD_EXPERIENCE_ORB, EntityTypes1_12.EntityType.EXPERIENCE_ORB);\n registerTracker(ClientboundPackets1_12.ADD_GLOBAL_ENTITY, EntityTypes1_12.EntityType.LIGHTNING_BOLT);\n\n protocol.registerClientbound(ClientboundPackets1_12.ADD_MOB, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity id\n map(Types.UUID); // 1 - UUID\n map(Types.VAR_INT); // 2 - Entity Type\n map(Types.DOUBLE); // 3 - X\n map(Types.DOUBLE); // 4 - Y\n map(Types.DOUBLE); // 5 - Z\n map(Types.BYTE); // 6 - Yaw\n map(Types.BYTE); // 7 - Pitch\n map(Types.BYTE); // 8 - Head Pitch\n map(Types.SHORT); // 9 - Velocity X\n map(Types.SHORT); // 10 - Velocity Y\n map(Types.SHORT); // 11 - Velocity Z\n map(Types.ENTITY_DATA_LIST1_12, Types.ENTITY_DATA_LIST1_9); // 12 - Entity data\n\n // Track entity\n handler(getTrackerHandler());\n\n // Rewrite entity type / data\n handler(getMobSpawnRewriter1_11(Types.ENTITY_DATA_LIST1_9));\n }\n });\n\n registerTracker(ClientboundPackets1_12.ADD_PAINTING, EntityTypes1_12.EntityType.PAINTING);\n\n protocol.registerClientbound(ClientboundPackets1_12.ADD_PLAYER, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity ID\n map(Types.UUID); // 1 - Player UUID\n map(Types.DOUBLE); // 2 - X\n map(Types.DOUBLE); // 3 - Y\n map(Types.DOUBLE); // 4 - Z\n map(Types.BYTE); // 5 - Yaw\n map(Types.BYTE); // 6 - Pitch\n map(Types.ENTITY_DATA_LIST1_12, Types.ENTITY_DATA_LIST1_9); // 7 - Entity data list\n\n handler(getTrackerAndDataHandler(Types.ENTITY_DATA_LIST1_9, EntityTypes1_12.EntityType.PLAYER));\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_12.LOGIN, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.INT); // 0 - Entity ID\n map(Types.UNSIGNED_BYTE); // 1 - Gamemode\n map(Types.INT); // 2 - Dimension\n\n handler(getDimensionHandler(1));\n handler(getPlayerTrackerHandler());\n\n handler(wrapper -> {\n ShoulderTracker tracker = wrapper.user().get(ShoulderTracker.class);\n tracker.setEntityId(wrapper.get(Types.INT, 0));\n });\n\n // Send fake inventory achievement\n handler(packetWrapper -> {\n PacketWrapper wrapper = PacketWrapper.create(ClientboundPackets1_9_3.AWARD_STATS, packetWrapper.user());\n\n wrapper.write(Types.VAR_INT, 1);\n wrapper.write(Types.STRING, \"achievement.openInventory\");\n wrapper.write(Types.VAR_INT, 1);\n\n wrapper.scheduleSend(Protocol1_12To1_11_1.class);\n });\n }\n });\n\n registerRespawn(ClientboundPackets1_12.RESPAWN);\n registerRemoveEntities(ClientboundPackets1_12.REMOVE_ENTITIES);\n registerSetEntityData(ClientboundPackets1_12.SET_ENTITY_DATA, Types.ENTITY_DATA_LIST1_12, Types.ENTITY_DATA_LIST1_9);\n\n protocol.registerClientbound(ClientboundPackets1_12.UPDATE_ATTRIBUTES, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT);\n map(Types.INT);\n handler(wrapper -> {\n int size = wrapper.get(Types.INT, 0);\n int newSize = size;\n for (int i = 0; i < size; i++) {\n String key = wrapper.read(Types.STRING);\n // Remove new attribute\n if (key.equals(\"generic.flyingSpeed\")) {\n newSize--;\n wrapper.read(Types.DOUBLE);\n int modSize = wrapper.read(Types.VAR_INT);\n for (int j = 0; j < modSize; j++) {\n wrapper.read(Types.UUID);\n wrapper.read(Types.DOUBLE);\n wrapper.read(Types.BYTE);\n }\n } else {\n wrapper.write(Types.STRING, key);\n wrapper.passthrough(Types.DOUBLE);\n int modSize = wrapper.passthrough(Types.VAR_INT);\n for (int j = 0; j < modSize; j++) {\n wrapper.passthrough(Types.UUID);\n wrapper.passthrough(Types.DOUBLE);\n wrapper.passthrough(Types.BYTE);\n }\n }\n }\n\n if (newSize != size) {\n wrapper.set(Types.INT, 0, newSize);\n }\n });\n }\n });\n }\n\n @Override\n protected void registerRewrites() {\n mapEntityTypeWithData(EntityTypes1_12.EntityType.PARROT, EntityTypes1_12.EntityType.BAT).plainName().spawnEntityData(storage -> storage.add(new EntityData(12, EntityDataTypes1_12.BYTE, (byte) 0x00)));\n mapEntityTypeWithData(EntityTypes1_12.EntityType.ILLUSIONER, EntityTypes1_12.EntityType.EVOKER).plainName();\n\n filter().handler((event, data) -> {\n if (data.dataType() == EntityDataTypes1_12.COMPONENT) {\n protocol.getComponentRewriter().processText(event.user(), (JsonElement) data.getValue());\n }\n });\n\n // Handle Illager\n filter().type(EntityTypes1_12.EntityType.EVOKER).removeIndex(12);\n\n filter().type(EntityTypes1_12.EntityType.ILLUSIONER).index(0).handler((event, data) -> {\n byte mask = (byte) data.getValue();\n\n if ((mask & 0x20) == 0x20) {\n mask &= ~0x20;\n }\n\n data.setValue(mask);\n });\n\n // Create Parrot storage\n filter().type(EntityTypes1_12.EntityType.PARROT).handler((event, data) -> {\n StoredEntityData entityData = storedEntityData(event);\n if (!entityData.has(ParrotStorage.class)) {\n entityData.put(new ParrotStorage());\n }\n });\n // Parrot remove animal entity data\n filter().type(EntityTypes1_12.EntityType.PARROT).cancel(12); // Is baby\n filter().type(EntityTypes1_12.EntityType.PARROT).index(13).handler((event, data) -> {\n StoredEntityData entityData = storedEntityData(event);\n ParrotStorage storage = entityData.get(ParrotStorage.class);\n boolean isSitting = (((byte) data.getValue()) & 0x01) == 0x01;\n boolean isTamed = (((byte) data.getValue()) & 0x04) == 0x04;\n\n if (!storage.isTamed() && isTamed) {\n // TODO do something to let the user know it's done\n }\n\n storage.setTamed(isTamed);\n\n if (isSitting) {\n event.setIndex(12);\n data.setValue((byte) 0x01);\n storage.setSitting(true);\n } else if (storage.isSitting()) {\n event.setIndex(12);\n data.setValue((byte) 0x00);\n storage.setSitting(false);\n } else {\n event.cancel();\n }\n }); // Flags (Is sitting etc, might be useful in the future\n filter().type(EntityTypes1_12.EntityType.PARROT).cancel(14); // Owner\n filter().type(EntityTypes1_12.EntityType.PARROT).cancel(15); // Variant\n\n // Left shoulder entity data\n filter().type(EntityTypes1_12.EntityType.PLAYER).index(15).handler((event, data) -> {\n CompoundTag tag = (CompoundTag) data.getValue();\n ShoulderTracker tracker = event.user().get(ShoulderTracker.class);\n\n if (tag.isEmpty() && tracker.getLeftShoulder() != null) {\n tracker.setLeftShoulder(null);\n tracker.update();\n } else if (tag.getStringTag(\"id\") != null && event.entityId() == tracker.getEntityId()) {\n String id = tag.getStringTag(\"id\").getValue();\n if (tracker.getLeftShoulder() == null || !tracker.getLeftShoulder().equals(id)) {\n tracker.setLeftShoulder(id);\n tracker.update();\n }\n }\n\n event.cancel();\n });\n\n // Right shoulder entity data\n filter().type(EntityTypes1_12.EntityType.PLAYER).index(16).handler((event, data) -> {\n CompoundTag tag = (CompoundTag) event.data().getValue();\n ShoulderTracker tracker = event.user().get(ShoulderTracker.class);\n\n if (tag.isEmpty() && tracker.getRightShoulder() != null) {\n tracker.setRightShoulder(null);\n tracker.update();\n } else if (tag.getStringTag(\"id\") != null && event.entityId() == tracker.getEntityId()) {\n String id = tag.getStringTag(\"id\").getValue();\n if (tracker.getRightShoulder() == null || !tracker.getRightShoulder().equals(id)) {\n tracker.setRightShoulder(id);\n tracker.update();\n }\n }\n\n event.cancel();\n });\n }\n\n @Override\n public EntityType typeFromId(int typeId) {\n return EntityTypes1_12.EntityType.findById(typeId);\n }\n\n @Override\n public EntityType objectTypeFromId(int typeId, int data) {\n return EntityTypes1_12.ObjectType.getEntityType(typeId, data);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/rewriter/SoundPacketRewriter1_12.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_12to1_11_1.rewriter;\n\nimport com.viaversion.viabackwards.api.rewriters.LegacySoundRewriter;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.Protocol1_12To1_11_1;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ClientboundPackets1_12;\n\npublic class SoundPacketRewriter1_12 extends LegacySoundRewriter {\n\n public SoundPacketRewriter1_12(Protocol1_12To1_11_1 protocol) {\n super(protocol);\n }\n\n @Override\n protected void registerPackets() {\n protocol.replaceClientbound(ClientboundPackets1_12.SOUND, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Sound name\n map(Types.VAR_INT); // 1 - Sound Category\n map(Types.INT); // 2 - x\n map(Types.INT); // 3 - y\n map(Types.INT); // 4 - z\n map(Types.FLOAT); // 5 - Volume\n map(Types.FLOAT); // 6 - Pitch\n\n handler(wrapper -> {\n int oldId = wrapper.get(Types.VAR_INT, 0);\n int newId = handleSounds(oldId);\n if (newId == -1) {\n wrapper.cancel();\n return;\n }\n\n if (hasPitch(oldId)) {\n wrapper.set(Types.FLOAT, 1, handlePitch(oldId));\n }\n wrapper.set(Types.VAR_INT, 0, newId);\n });\n }\n });\n }\n\n\n @Override\n protected void registerRewrites() {\n //TODO use the diff file to also have named sound remaps\n // (there were *A LOT* of refactored names)\n\n // Replacement sounds, suggestions are always welcome\n // Automatically generated from PAaaS\n added(26, 277, 1.4f); // block.end_portal.spawn -> entity.lightning.thunder\n added(27, -1); // block.end_portal_frame.fill\n\n added(72, 70); // block.note.bell -> block.note.harp\n added(73, 70); // block.note.chime -> block.note.harp\n added(74, 70); // block.note.flute -> block.note.harp\n added(75, 70); // block.note.guitar -> block.note.harp\n added(80, 70); // block.note.xylophone -> block.note.harp\n\n added(150, -1); // entity.boat.paddle_land\n added(151, -1); // entity.boat.paddle_water\n\n added(152, -1); // entity.bobber.retrieve\n\n added(195, -1); // entity.endereye.death\n\n added(274, 198, 0.8f); // entity.illusion_illager.ambient -> entity.evocation_illager.ambient\n added(275, 199, 0.8f); // entity.illusion_illager.cast_spell -> entity.evocation_illager.cast_spell\n added(276, 200, 0.8f); // entity.illusion_illager.death -> entity.evocation_illager.death\n added(277, 201, 0.8f); // entity.illusion_illager.hurt -> entity.evocation_illager.hurt\n added(278, 191, 0.9f); // entity.illusion_illager.mirror_move -> entity.endermen.teleport\n added(279, 203, 1.5f); // entity.illusion_illager.prepare_blindness -> entity.evocation_illager.prepare_summon\n added(280, 202, 0.8f); // entity.illusion_illager.prepare_mirror -> entity.evocation_illager.prepare_attack\n\n added(319, 133, 0.6f); // entity.parrot.ambient -> entity.bat.ambient\n added(320, 134, 1.7f); // entity.parrot.death -> entity.bat.death\n added(321, 219, 1.5f); // entity.parrot.eat -> entity.generic.eat\n added(322, 136, 0.7f); // entity.parrot.fly -> entity.bat.loop\n added(323, 135, 1.6f); // entity.parrot.hurt -> entity.bat.hurt\n added(324, 138, 1.5f); // entity.parrot.imitate.blaze -> entity.blaze.ambient\n added(325, 163, 1.5f); // entity.parrot.imitate.creeper -> entity.creeper.primed\n added(326, 170, 1.5f); // entity.parrot.imitate.elder_guardian -> entity.elder_guardian.ambient\n added(327, 178, 1.5f); // entity.parrot.imitate.enderdragon -> entity.enderdragon.ambient\n added(328, 186, 1.5f); // entity.parrot.imitate.enderman -> entity.endermen.ambient\n added(329, 192, 1.5f); // entity.parrot.imitate.endermite -> entity.endermite.ambient\n added(330, 198, 1.5f); // entity.parrot.imitate.evocation_illager -> entity.evocation_illager.ambient\n added(331, 226, 1.5f); // entity.parrot.imitate.ghast -> entity.ghast.ambient\n added(332, 259, 1.5f); // entity.parrot.imitate.husk -> entity.husk.ambient\n added(333, 198, 1.3f); // entity.parrot.imitate.illusion_illager -> entity.evocation_illager.ambient\n added(334, 291, 1.5f); // entity.parrot.imitate.magmacube -> entity.magmacube.squish\n added(335, 321, 1.5f); // entity.parrot.imitate.polar_bear -> entity.polar_bear.ambient\n added(336, 337, 1.5f); // entity.parrot.imitate.shulker -> entity.shulker.ambient\n added(337, 347, 1.5f); // entity.parrot.imitate.silverfish -> entity.silverfish.ambient\n added(338, 351, 1.5f); // entity.parrot.imitate.skeleton -> entity.skeleton.ambient\n added(339, 363, 1.5f); // entity.parrot.imitate.slime -> entity.slime.squish\n added(340, 376, 1.5f); // entity.parrot.imitate.spider -> entity.spider.ambient\n added(341, 385, 1.5f); // entity.parrot.imitate.stray -> entity.stray.ambient\n added(342, 390, 1.5f); // entity.parrot.imitate.vex -> entity.vex.ambient\n added(343, 400, 1.5f); // entity.parrot.imitate.vindication_illager -> entity.vindication_illager.ambient\n added(344, 403, 1.5f); // entity.parrot.imitate.witch -> entity.witch.ambient\n added(345, 408, 1.5f); // entity.parrot.imitate.wither -> entity.wither.ambient\n added(346, 414, 1.5f); // entity.parrot.imitate.wither_skeleton -> entity.wither_skeleton.ambient\n added(347, 418, 1.5f); // entity.parrot.imitate.wolf -> entity.wolf.ambient\n added(348, 427, 1.5f); // entity.parrot.imitate.zombie -> entity.zombie.ambient\n added(349, 438, 1.5f); // entity.parrot.imitate.zombie_pigman -> entity.zombie_pig.ambient\n added(350, 442, 1.5f); // entity.parrot.imitate.zombie_villager -> entity.zombie_villager.ambient\n added(351, 155); // entity.parrot.step -> entity.chicken.step\n\n added(368, 316); // entity.player.hurt_drown -> entity.player.hurt\n added(369, 316); // entity.player.hurt_on_fire -> entity.player.hurt\n\n // No replacement sounds for these, since it could be confusing, the toast doesn't show up\n added(544, -1); // ui.toast.in\n added(545, -1); // ui.toast.out\n added(546, 317, 1.5f); // ui.toast.challenge_complete\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/storage/ParrotStorage.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_12to1_11_1.storage;\n\npublic class ParrotStorage {\n private boolean tamed = true;\n private boolean sitting = true;\n\n public boolean isTamed() {\n return tamed;\n }\n\n public void setTamed(boolean tamed) {\n this.tamed = tamed;\n }\n\n public boolean isSitting() {\n return sitting;\n }\n\n public void setSitting(boolean sitting) {\n this.sitting = sitting;\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/storage/ShoulderTracker.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_12to1_11_1.storage;\n\nimport com.viaversion.viabackwards.ViaBackwards;\nimport com.viaversion.viabackwards.protocol.v1_12to1_11_1.Protocol1_12To1_11_1;\nimport com.viaversion.viaversion.api.connection.StoredObject;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.protocol.packet.PacketWrapper;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ClientboundPackets1_12;\nimport com.viaversion.viaversion.util.ComponentUtil;\nimport com.viaversion.viaversion.util.Key;\nimport java.util.Locale;\n\npublic class ShoulderTracker extends StoredObject {\n private int entityId;\n private String leftShoulder;\n private String rightShoulder;\n\n public ShoulderTracker(UserConnection user) {\n super(user);\n }\n\n public void update() {\n PacketWrapper wrapper = PacketWrapper.create(ClientboundPackets1_12.CHAT, getUser());\n\n try {\n wrapper.write(Types.COMPONENT, ComponentUtil.plainToJson(generateString()));\n } catch (final Exception e) {\n throw new RuntimeException(e);\n }\n wrapper.write(Types.BYTE, (byte) 2);\n\n try {\n wrapper.scheduleSend(Protocol1_12To1_11_1.class);\n } catch (Exception e) {\n ViaBackwards.getPlatform().getLogger().severe(\"Failed to send the shoulder indication\");\n e.printStackTrace();\n }\n }\n\n // Does actionbar not support json colors? :(\n private String generateString() {\n StringBuilder builder = new StringBuilder();\n\n // Empty spaces because the non-json formatting is weird\n builder.append(\" \");\n if (leftShoulder == null) {\n builder.append(\"§4§lNothing\");\n } else {\n builder.append(\"§2§l\").append(getName(leftShoulder));\n }\n\n builder.append(\"§8§l <- §7§lShoulders§8§l -> \");\n\n if (rightShoulder == null) {\n builder.append(\"§4§lNothing\");\n } else {\n builder.append(\"§2§l\").append(getName(rightShoulder));\n }\n\n return builder.toString();\n }\n\n private String getName(String current) {\n current = Key.stripMinecraftNamespace(current);\n\n String[] array = current.split(\"_\");\n StringBuilder builder = new StringBuilder();\n\n for (String s : array) {\n builder.append(s.substring(0, 1).toUpperCase(Locale.ROOT))\n .append(s.substring(1))\n .append(\" \");\n }\n\n return builder.toString();\n }\n\n public int getEntityId() {\n return entityId;\n }\n\n public void setEntityId(int entityId) {\n this.entityId = entityId;\n }\n\n public String getLeftShoulder() {\n return leftShoulder;\n }\n\n public void setLeftShoulder(String leftShoulder) {\n this.leftShoulder = leftShoulder;\n }\n\n public String getRightShoulder() {\n return rightShoulder;\n }\n\n public void setRightShoulder(String rightShoulder) {\n this.rightShoulder = rightShoulder;\n }\n\n @Override\n public String toString() {\n return \"ShoulderTracker{\" + \"entityId=\" + entityId + \", leftShoulder='\" + leftShoulder + '\\'' + \", rightShoulder='\" + rightShoulder + '\\'' + '}';\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_1to1_13/Protocol1_13_1To1_13.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_13_1to1_13;\n\nimport com.viaversion.viabackwards.ViaBackwards;\nimport com.viaversion.viabackwards.api.BackwardsProtocol;\nimport com.viaversion.viabackwards.api.data.BackwardsMappingData;\nimport com.viaversion.viabackwards.api.rewriters.text.JsonNBTComponentRewriter;\nimport com.viaversion.viabackwards.protocol.v1_13_1to1_13.rewriter.CommandRewriter1_13_1;\nimport com.viaversion.viabackwards.protocol.v1_13_1to1_13.rewriter.EntityPacketRewriter1_13_1;\nimport com.viaversion.viabackwards.protocol.v1_13_1to1_13.rewriter.ItemPacketRewriter1_13_1;\nimport com.viaversion.viabackwards.protocol.v1_13_1to1_13.rewriter.WorldPacketRewriter1_13_1;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.minecraft.ClientWorld;\nimport com.viaversion.viaversion.api.minecraft.RegistryType;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_13;\nimport com.viaversion.viaversion.api.minecraft.item.Item;\nimport com.viaversion.viaversion.api.protocol.packet.PacketWrapper;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.protocol.remapper.ValueTransformer;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.data.entity.EntityTrackerBase;\nimport com.viaversion.viaversion.libs.gson.JsonElement;\nimport com.viaversion.viaversion.libs.gson.JsonObject;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ServerboundPackets1_13;\nimport com.viaversion.viaversion.protocols.v1_13to1_13_1.Protocol1_13To1_13_1;\nimport com.viaversion.viaversion.rewriter.ParticleRewriter;\nimport com.viaversion.viaversion.rewriter.TagRewriter;\nimport com.viaversion.viaversion.rewriter.text.ComponentRewriterBase;\nimport com.viaversion.viaversion.util.ComponentUtil;\n\npublic class Protocol1_13_1To1_13 extends BackwardsProtocol {\n\n public static final BackwardsMappingData MAPPINGS = new BackwardsMappingData(\"1.13.2\", \"1.13\", Protocol1_13To1_13_1.class);\n private final EntityPacketRewriter1_13_1 entityRewriter = new EntityPacketRewriter1_13_1(this);\n private final ItemPacketRewriter1_13_1 itemRewriter = new ItemPacketRewriter1_13_1(this);\n private final ParticleRewriter particleRewriter = new ParticleRewriter<>(this);\n private final JsonNBTComponentRewriter translatableRewriter = new JsonNBTComponentRewriter<>(this, ComponentRewriterBase.ReadType.JSON);\n private final TagRewriter tagRewriter = new TagRewriter<>(this);\n\n public Protocol1_13_1To1_13() {\n super(ClientboundPackets1_13.class, ClientboundPackets1_13.class, ServerboundPackets1_13.class, ServerboundPackets1_13.class);\n }\n\n @Override\n protected void registerPackets() {\n super.registerPackets();\n\n WorldPacketRewriter1_13_1.register(this);\n\n new CommandRewriter1_13_1(this).registerDeclareCommands(ClientboundPackets1_13.COMMANDS);\n\n registerServerbound(ServerboundPackets1_13.COMMAND_SUGGESTION, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT);\n map(Types.STRING, new ValueTransformer<>(Types.STRING) {\n @Override\n public String transform(PacketWrapper wrapper, String inputValue) {\n // 1.13 starts sending slash at start, so we remove it for compatibility\n return !inputValue.startsWith(\"/\") ? \"/\" + inputValue : inputValue;\n }\n });\n }\n });\n\n registerServerbound(ServerboundPackets1_13.EDIT_BOOK, wrapper -> {\n final Item item = itemRewriter.handleItemToServer(wrapper.user(), wrapper.read(Types.ITEM1_13));\n wrapper.write(Types.ITEM1_13, item);\n wrapper.passthrough(Types.BOOLEAN);\n wrapper.write(Types.VAR_INT, 0);\n });\n\n registerClientbound(ClientboundPackets1_13.OPEN_SCREEN, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.UNSIGNED_BYTE); // Id\n map(Types.STRING); // Window Type\n handler(wrapper -> {\n JsonElement title = wrapper.passthrough(Types.COMPONENT);\n translatableRewriter.processText(wrapper.user(), title);\n\n if (ViaBackwards.getConfig().fix1_13FormattedInventoryTitle()) {\n if (title.isJsonObject() && title.getAsJsonObject().size() == 1\n && title.getAsJsonObject().has(\"translate\")) {\n // Hotfix simple translatable components from being converted to legacy text\n return;\n }\n\n // https://bugs.mojang.com/browse/MC-124543\n JsonObject legacyComponent = new JsonObject();\n legacyComponent.addProperty(\"text\", ComponentUtil.jsonToLegacy(title));\n wrapper.set(Types.COMPONENT, 0, legacyComponent);\n }\n });\n }\n });\n\n registerClientbound(ClientboundPackets1_13.COMMAND_SUGGESTIONS, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // Transaction id\n map(Types.VAR_INT); // Start\n map(Types.VAR_INT); // Length\n map(Types.VAR_INT); // Count\n handler(wrapper -> {\n int start = wrapper.get(Types.VAR_INT, 1);\n wrapper.set(Types.VAR_INT, 1, start - 1); // Offset by +1 to take into account / at beginning\n // Passthrough suggestions\n int count = wrapper.get(Types.VAR_INT, 3);\n for (int i = 0; i < count; i++) {\n wrapper.passthrough(Types.STRING);\n wrapper.passthrough(Types.OPTIONAL_COMPONENT); // Tooltip\n }\n });\n }\n });\n\n replaceClientbound(ClientboundPackets1_13.BOSS_EVENT, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.UUID);\n map(Types.VAR_INT);\n handler(wrapper -> {\n int action = wrapper.get(Types.VAR_INT, 0);\n if (action == 0 || action == 3) {\n translatableRewriter.processText(wrapper.user(), wrapper.passthrough(Types.COMPONENT));\n if (action == 0) {\n wrapper.passthrough(Types.FLOAT);\n wrapper.passthrough(Types.VAR_INT);\n wrapper.passthrough(Types.VAR_INT);\n short flags = wrapper.read(Types.UNSIGNED_BYTE);\n if ((flags & 0x04) != 0) flags |= 0x02;\n wrapper.write(Types.UNSIGNED_BYTE, flags);\n }\n }\n });\n }\n });\n\n tagRewriter.register(ClientboundPackets1_13.UPDATE_TAGS, RegistryType.ITEM);\n }\n\n @Override\n public void init(UserConnection user) {\n user.addEntityTracker(getClass(), new EntityTrackerBase(user, EntityTypes1_13.EntityType.PLAYER));\n user.addClientWorld(getClass(), new ClientWorld());\n }\n\n @Override\n public BackwardsMappingData getMappingData() {\n return MAPPINGS;\n }\n\n @Override\n public EntityPacketRewriter1_13_1 getEntityRewriter() {\n return entityRewriter;\n }\n\n @Override\n public ItemPacketRewriter1_13_1 getItemRewriter() {\n return itemRewriter;\n }\n\n @Override\n public ParticleRewriter getParticleRewriter() {\n return particleRewriter;\n }\n\n @Override\n public JsonNBTComponentRewriter getComponentRewriter() {\n return translatableRewriter;\n }\n\n public JsonNBTComponentRewriter translatableRewriter() {\n return translatableRewriter;\n }\n\n @Override\n public TagRewriter getTagRewriter() {\n return tagRewriter;\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_1to1_13/rewriter/CommandRewriter1_13_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_13_1to1_13.rewriter;\n\nimport com.viaversion.viabackwards.protocol.v1_13_1to1_13.Protocol1_13_1To1_13;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;\nimport com.viaversion.viaversion.rewriter.CommandRewriter;\nimport org.checkerframework.checker.nullness.qual.Nullable;\n\npublic class CommandRewriter1_13_1 extends CommandRewriter {\n\n public CommandRewriter1_13_1(Protocol1_13_1To1_13 protocol) {\n super(protocol);\n\n this.parserHandlers.put(\"minecraft:dimension\", wrapper -> wrapper.write(Types.VAR_INT, 0)); // Single word\n }\n\n @Override\n public @Nullable String handleArgumentType(String argumentType) {\n if (argumentType.equals(\"minecraft:column_pos\")) {\n return \"minecraft:vec2\";\n } else if (argumentType.equals(\"minecraft:dimension\")) {\n return \"brigadier:string\";\n }\n return super.handleArgumentType(argumentType);\n }\n\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_1to1_13/rewriter/EntityPacketRewriter1_13_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_13_1to1_13.rewriter;\n\nimport com.viaversion.viabackwards.api.rewriters.LegacyEntityRewriter;\nimport com.viaversion.viabackwards.protocol.v1_13_1to1_13.Protocol1_13_1To1_13;\nimport com.viaversion.viaversion.api.minecraft.Particle;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityType;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_13;\nimport com.viaversion.viaversion.api.minecraft.entitydata.EntityData;\nimport com.viaversion.viaversion.api.minecraft.item.Item;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.api.type.types.version.Types1_13;\nimport com.viaversion.viaversion.libs.gson.JsonElement;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;\nimport java.util.List;\n\npublic class EntityPacketRewriter1_13_1 extends LegacyEntityRewriter {\n\n public EntityPacketRewriter1_13_1(Protocol1_13_1To1_13 protocol) {\n super(protocol);\n }\n\n @Override\n protected void registerPackets() {\n protocol.registerClientbound(ClientboundPackets1_13.ADD_ENTITY, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity id\n map(Types.UUID); // 1 - UUID\n map(Types.BYTE); // 2 - Type\n map(Types.DOUBLE); // 3 - X\n map(Types.DOUBLE); // 4 - Y\n map(Types.DOUBLE); // 5 - Z\n map(Types.BYTE); // 6 - Pitch\n map(Types.BYTE); // 7 - Yaw\n map(Types.INT); // 8 - Data\n\n handler(wrapper -> {\n int entityId = wrapper.get(Types.VAR_INT, 0);\n byte type = wrapper.get(Types.BYTE, 0);\n int data = wrapper.get(Types.INT, 0);\n EntityTypes1_13.EntityType entType = EntityTypes1_13.ObjectType.getEntityType(type, data);\n if (entType == null) {\n return;\n }\n\n // Rewrite falling block\n if (entType.is(EntityTypes1_13.EntityType.FALLING_BLOCK)) {\n wrapper.set(Types.INT, 0, protocol.getMappingData().getNewBlockStateId(data));\n }\n\n // Track Entity\n tracker(wrapper.user()).addEntity(entityId, entType);\n });\n }\n });\n\n registerTracker(ClientboundPackets1_13.ADD_EXPERIENCE_ORB, EntityTypes1_13.EntityType.EXPERIENCE_ORB);\n registerTracker(ClientboundPackets1_13.ADD_GLOBAL_ENTITY, EntityTypes1_13.EntityType.LIGHTNING_BOLT);\n\n protocol.registerClientbound(ClientboundPackets1_13.ADD_MOB, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity ID\n map(Types.UUID); // 1 - Entity UUID\n map(Types.VAR_INT); // 2 - Entity Type\n map(Types.DOUBLE); // 3 - X\n map(Types.DOUBLE); // 4 - Y\n map(Types.DOUBLE); // 5 - Z\n map(Types.BYTE); // 6 - Yaw\n map(Types.BYTE); // 7 - Pitch\n map(Types.BYTE); // 8 - Head Pitch\n map(Types.SHORT); // 9 - Velocity X\n map(Types.SHORT); // 10 - Velocity Y\n map(Types.SHORT); // 11 - Velocity Z\n map(Types1_13.ENTITY_DATA_LIST); // 12 - Entity data\n\n // Track Entity\n handler(getTrackerHandler());\n\n // Rewrite Entity data\n handler(wrapper -> {\n List entityDataList = wrapper.get(Types1_13.ENTITY_DATA_LIST, 0);\n handleEntityData(wrapper.get(Types.VAR_INT, 0), entityDataList, wrapper.user());\n });\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_13.ADD_PLAYER, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity ID\n map(Types.UUID); // 1 - Player UUID\n map(Types.DOUBLE); // 2 - X\n map(Types.DOUBLE); // 3 - Y\n map(Types.DOUBLE); // 4 - Z\n map(Types.BYTE); // 5 - Yaw\n map(Types.BYTE); // 6 - Pitch\n map(Types1_13.ENTITY_DATA_LIST); // 7 - Entity data\n\n handler(getTrackerAndDataHandler(Types1_13.ENTITY_DATA_LIST, EntityTypes1_13.EntityType.PLAYER));\n }\n });\n\n registerTracker(ClientboundPackets1_13.ADD_PAINTING, EntityTypes1_13.EntityType.PAINTING);\n registerJoinGame(ClientboundPackets1_13.LOGIN, EntityTypes1_13.EntityType.PLAYER);\n registerRespawn(ClientboundPackets1_13.RESPAWN);\n registerSetEntityData(ClientboundPackets1_13.SET_ENTITY_DATA, Types1_13.ENTITY_DATA_LIST);\n }\n\n @Override\n protected void registerRewrites() {\n // Rewrite items & blocks\n filter().handler((event, data) -> {\n if (data.dataType() == Types1_13.ENTITY_DATA_TYPES.itemType) {\n data.setValue(protocol.getItemRewriter().handleItemToClient(event.user(), (Item) data.getValue()));\n } else if (data.dataType() == Types1_13.ENTITY_DATA_TYPES.optionalBlockStateType) {\n // Convert to new block id\n int value = (int) data.getValue();\n data.setValue(protocol.getMappingData().getNewBlockStateId(value));\n } else if (data.dataType() == Types1_13.ENTITY_DATA_TYPES.particleType) {\n protocol.getParticleRewriter().rewriteParticle(event.user(), (Particle) data.getValue());\n } else if (data.dataType() == Types1_13.ENTITY_DATA_TYPES.optionalComponentType || data.dataType() == Types1_13.ENTITY_DATA_TYPES.componentType) {\n JsonElement element = data.value();\n protocol.translatableRewriter().processText(event.user(), element);\n }\n });\n\n // Remove shooter UUID\n filter().type(EntityTypes1_13.EntityType.ABSTRACT_ARROW).cancel(7);\n\n // Move colors to old position\n filter().type(EntityTypes1_13.EntityType.SPECTRAL_ARROW).index(8).toIndex(7);\n\n // Move loyalty level to old position\n filter().type(EntityTypes1_13.EntityType.TRIDENT).index(8).toIndex(7);\n\n // Rewrite Minecart blocks\n registerBlockStateHandler(EntityTypes1_13.EntityType.ABSTRACT_MINECART, 9);\n }\n\n @Override\n public EntityType typeFromId(int typeId) {\n return EntityTypes1_13.EntityType.findById(typeId);\n }\n\n @Override\n public EntityType objectTypeFromId(int typeId, int data) {\n return EntityTypes1_13.ObjectType.getEntityType(typeId, data);\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_1to1_13/rewriter/ItemPacketRewriter1_13_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_13_1to1_13.rewriter;\n\nimport com.viaversion.viabackwards.protocol.v1_13_1to1_13.Protocol1_13_1To1_13;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ServerboundPackets1_13;\nimport com.viaversion.viaversion.rewriter.ItemRewriter;\n\npublic class ItemPacketRewriter1_13_1 extends ItemRewriter {\n\n public ItemPacketRewriter1_13_1(Protocol1_13_1To1_13 protocol) {\n super(protocol, Types.ITEM1_13, Types.ITEM1_13_SHORT_ARRAY);\n }\n\n @Override\n public void registerPackets() {\n protocol.registerClientbound(ClientboundPackets1_13.CUSTOM_PAYLOAD, wrapper -> {\n String channel = wrapper.passthrough(Types.STRING);\n if (channel.equals(\"minecraft:trader_list\")) {\n wrapper.passthrough(Types.INT); //Passthrough Window ID\n\n int size = wrapper.passthrough(Types.UNSIGNED_BYTE);\n for (int i = 0; i < size; i++) {\n passthroughClientboundItem(wrapper); // Input\n passthroughClientboundItem(wrapper); // Output\n\n boolean secondItem = wrapper.passthrough(Types.BOOLEAN); //Has second item\n if (secondItem) {\n passthroughClientboundItem(wrapper); // Second item\n }\n\n wrapper.passthrough(Types.BOOLEAN); //Trade disabled\n wrapper.passthrough(Types.INT); //Number of tools uses\n wrapper.passthrough(Types.INT); //Maximum number of trade uses\n }\n }\n });\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_1to1_13/rewriter/WorldPacketRewriter1_13_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_13_1to1_13.rewriter;\n\nimport com.viaversion.viabackwards.protocol.v1_13_1to1_13.Protocol1_13_1To1_13;\nimport com.viaversion.viaversion.api.minecraft.BlockFace;\nimport com.viaversion.viaversion.api.minecraft.BlockPosition;\nimport com.viaversion.viaversion.api.minecraft.ClientWorld;\nimport com.viaversion.viaversion.api.minecraft.chunks.Chunk;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.api.type.types.chunk.ChunkType1_13;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;\nimport com.viaversion.viaversion.rewriter.BlockRewriter;\n\npublic class WorldPacketRewriter1_13_1 {\n\n public static void register(Protocol1_13_1To1_13 protocol) {\n BlockRewriter blockRewriter = BlockRewriter.legacy(protocol);\n\n protocol.registerClientbound(ClientboundPackets1_13.LEVEL_CHUNK, wrapper -> {\n ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_13_1To1_13.class);\n Chunk chunk = wrapper.passthrough(ChunkType1_13.forEnvironment(clientWorld.getEnvironment()));\n\n blockRewriter.handleChunk(chunk);\n });\n\n blockRewriter.registerBlockEvent(ClientboundPackets1_13.BLOCK_EVENT);\n blockRewriter.registerBlockUpdate(ClientboundPackets1_13.BLOCK_UPDATE);\n blockRewriter.registerChunkBlocksUpdate(ClientboundPackets1_13.CHUNK_BLOCKS_UPDATE);\n protocol.registerClientbound(ClientboundPackets1_13.LEVEL_EVENT, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.INT); // Effect Id\n map(Types.BLOCK_POSITION1_8); // Location\n map(Types.INT); // Data\n handler(wrapper -> {\n int id = wrapper.get(Types.INT, 0);\n int data = wrapper.get(Types.INT, 1);\n if (id == 1010) { // Play record\n wrapper.set(Types.INT, 1, protocol.getMappingData().getNewItemId(data));\n } else if (id == 2001) { // Block break + block break sound\n wrapper.set(Types.INT, 1, protocol.getMappingData().getNewBlockStateId(data));\n } else if (id == 2000) { // Smoke\n switch (data) { // Down\n case 0, 1 -> { // Up\n BlockPosition pos = wrapper.get(Types.BLOCK_POSITION1_8, 0);\n BlockFace relative = data == 0 ? BlockFace.BOTTOM : BlockFace.TOP;\n wrapper.set(Types.BLOCK_POSITION1_8, 0, pos.getRelative(relative)); // Y Offset\n wrapper.set(Types.INT, 1, 4); // Self\n }\n case 2 -> wrapper.set(Types.INT, 1, 1); // North\n case 3 -> wrapper.set(Types.INT, 1, 7); // South\n case 4 -> wrapper.set(Types.INT, 1, 3); // West\n case 5 -> wrapper.set(Types.INT, 1, 5); // East\n }\n }\n });\n }\n });\n\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_2to1_13_1/Protocol1_13_2To1_13_1.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_13_2to1_13_1;\n\nimport com.viaversion.viabackwards.api.BackwardsProtocol;\nimport com.viaversion.viabackwards.protocol.v1_13_2to1_13_1.rewriter.EntityPacketRewriter1_13_2;\nimport com.viaversion.viabackwards.protocol.v1_13_2to1_13_1.rewriter.ItemPacketRewriter1_13_2;\nimport com.viaversion.viabackwards.protocol.v1_13_2to1_13_1.rewriter.WorldPacketRewriter1_13_2;\nimport com.viaversion.viaversion.api.minecraft.item.Item;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ServerboundPackets1_13;\n\npublic class Protocol1_13_2To1_13_1 extends BackwardsProtocol {\n\n public Protocol1_13_2To1_13_1() {\n super(ClientboundPackets1_13.class, ClientboundPackets1_13.class, ServerboundPackets1_13.class, ServerboundPackets1_13.class);\n }\n\n @Override\n protected void registerPackets() {\n ItemPacketRewriter1_13_2.register(this);\n WorldPacketRewriter1_13_2.register(this);\n EntityPacketRewriter1_13_2.register(this);\n\n registerServerbound(ServerboundPackets1_13.EDIT_BOOK, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.ITEM1_13, Types.ITEM1_13_2);\n }\n });\n\n registerClientbound(ClientboundPackets1_13.UPDATE_ADVANCEMENTS, wrapper -> {\n wrapper.passthrough(Types.BOOLEAN); // Reset/clear\n int size = wrapper.passthrough(Types.VAR_INT); // Mapping size\n\n for (int i = 0; i < size; i++) {\n wrapper.passthrough(Types.STRING); // Identifier\n wrapper.passthrough(Types.OPTIONAL_STRING); // Parent\n\n // Display data\n if (wrapper.passthrough(Types.BOOLEAN)) {\n wrapper.passthrough(Types.COMPONENT); // Title\n wrapper.passthrough(Types.COMPONENT); // Description\n Item icon = wrapper.read(Types.ITEM1_13_2);\n wrapper.write(Types.ITEM1_13, icon);\n wrapper.passthrough(Types.VAR_INT); // Frame type\n int flags = wrapper.passthrough(Types.INT); // Flags\n if ((flags & 1) != 0)\n wrapper.passthrough(Types.STRING); // Background texture\n wrapper.passthrough(Types.FLOAT); // X\n wrapper.passthrough(Types.FLOAT); // Y\n }\n\n wrapper.passthrough(Types.STRING_ARRAY); // Criteria\n\n int arrayLength = wrapper.passthrough(Types.VAR_INT);\n for (int array = 0; array < arrayLength; array++) {\n wrapper.passthrough(Types.STRING_ARRAY); // String array\n }\n }\n });\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_2to1_13_1/rewriter/EntityPacketRewriter1_13_2.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_13_2to1_13_1.rewriter;\n\nimport com.viaversion.viabackwards.protocol.v1_13_2to1_13_1.Protocol1_13_2To1_13_1;\nimport com.viaversion.viaversion.api.minecraft.Particle;\nimport com.viaversion.viaversion.api.minecraft.entitydata.EntityData;\nimport com.viaversion.viaversion.api.minecraft.entitydata.EntityDataType;\nimport com.viaversion.viaversion.api.minecraft.item.Item;\nimport com.viaversion.viaversion.api.protocol.packet.PacketWrapper;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.api.type.types.version.Types1_13;\nimport com.viaversion.viaversion.api.type.types.version.Types1_13_2;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;\n\npublic class EntityPacketRewriter1_13_2 {\n\n\n public static void register(Protocol1_13_2To1_13_1 protocol) {\n protocol.registerClientbound(ClientboundPackets1_13.ADD_MOB, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity ID\n map(Types.UUID); // 1 - Entity UUID\n map(Types.VAR_INT); // 2 - Entity Type\n map(Types.DOUBLE); // 3 - X\n map(Types.DOUBLE); // 4 - Y\n map(Types.DOUBLE); // 5 - Z\n map(Types.BYTE); // 6 - Yaw\n map(Types.BYTE); // 7 - Pitch\n map(Types.BYTE); // 8 - Head Pitch\n map(Types.SHORT); // 9 - Velocity X\n map(Types.SHORT); // 10 - Velocity Y\n map(Types.SHORT); // 11 - Velocity Z\n map(Types1_13_2.ENTITY_DATA_LIST, Types1_13.ENTITY_DATA_LIST); // 12 - Entity data\n\n handler(EntityPacketRewriter1_13_2::updateEntityData);\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_13.ADD_PLAYER, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity ID\n map(Types.UUID); // 1 - Player UUID\n map(Types.DOUBLE); // 2 - X\n map(Types.DOUBLE); // 3 - Y\n map(Types.DOUBLE); // 4 - Z\n map(Types.BYTE); // 5 - Yaw\n map(Types.BYTE); // 6 - Pitch\n map(Types1_13_2.ENTITY_DATA_LIST, Types1_13.ENTITY_DATA_LIST); // 7 - Entity data\n\n handler(EntityPacketRewriter1_13_2::updateEntityData);\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_13.SET_ENTITY_DATA, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity ID\n map(Types1_13_2.ENTITY_DATA_LIST, Types1_13.ENTITY_DATA_LIST); // 1 - Entity data list\n\n handler(EntityPacketRewriter1_13_2::updateEntityData);\n }\n });\n }\n\n private static void updateEntityData(final PacketWrapper wrapper) {\n for (final EntityData data : wrapper.get(Types1_13.ENTITY_DATA_LIST, 0)) {\n final EntityDataType dataType = Types1_13.ENTITY_DATA_TYPES.byId(data.dataType().typeId());\n data.setDataType(dataType);\n\n if (dataType == Types1_13.ENTITY_DATA_TYPES.particleType) {\n final Particle particle = data.value();\n if (particle.id() == 27) {\n final Item item = particle.- getArgument(0).getValue();\n particle.set(0, Types.ITEM1_13, item);\n }\n }\n }\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_2to1_13_1/rewriter/ItemPacketRewriter1_13_2.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_13_2to1_13_1.rewriter;\n\nimport com.viaversion.viabackwards.protocol.v1_13_2to1_13_1.Protocol1_13_2To1_13_1;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ServerboundPackets1_13;\n\npublic class ItemPacketRewriter1_13_2 {\n\n public static void register(Protocol1_13_2To1_13_1 protocol) {\n protocol.registerClientbound(ClientboundPackets1_13.CONTAINER_SET_SLOT, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.BYTE); // 0 - Window ID\n map(Types.SHORT); // 1 - Slot ID\n map(Types.ITEM1_13_2, Types.ITEM1_13); // 2 - Slot Value\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_13.CONTAINER_SET_CONTENT, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.UNSIGNED_BYTE); // 0 - Window ID\n map(Types.ITEM1_13_2_SHORT_ARRAY, Types.ITEM1_13_SHORT_ARRAY); // 1 - Window Values\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_13.CUSTOM_PAYLOAD, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.STRING); // Channel\n handler(wrapper -> {\n String channel = wrapper.get(Types.STRING, 0);\n if (channel.equals(\"minecraft:trader_list\") || channel.equals(\"trader_list\")) {\n wrapper.passthrough(Types.INT); // Passthrough Window ID\n\n int size = wrapper.passthrough(Types.UNSIGNED_BYTE);\n for (int i = 0; i < size; i++) {\n // Input Item\n wrapper.write(Types.ITEM1_13, wrapper.read(Types.ITEM1_13_2));\n // Output Item\n wrapper.write(Types.ITEM1_13, wrapper.read(Types.ITEM1_13_2));\n\n boolean secondItem = wrapper.passthrough(Types.BOOLEAN); // Has second item\n if (secondItem) {\n wrapper.write(Types.ITEM1_13, wrapper.read(Types.ITEM1_13_2));\n }\n\n wrapper.passthrough(Types.BOOLEAN); // Trade disabled\n wrapper.passthrough(Types.INT); // Number of tools uses\n wrapper.passthrough(Types.INT); // Maximum number of trade uses\n }\n }\n });\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_13.SET_EQUIPPED_ITEM, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.VAR_INT); // 0 - Entity ID\n map(Types.VAR_INT); // 1 - Slot ID\n map(Types.ITEM1_13_2, Types.ITEM1_13); // 2 - Item\n }\n });\n\n protocol.registerClientbound(ClientboundPackets1_13.UPDATE_RECIPES, wrapper -> {\n int recipesNo = wrapper.passthrough(Types.VAR_INT);\n for (int i = 0; i < recipesNo; i++) {\n wrapper.passthrough(Types.STRING); // Id\n String type = wrapper.passthrough(Types.STRING);\n if (type.equals(\"crafting_shapeless\")) {\n wrapper.passthrough(Types.STRING); // Group\n int ingredientsNo = wrapper.passthrough(Types.VAR_INT);\n for (int i1 = 0; i1 < ingredientsNo; i1++) {\n wrapper.write(Types.ITEM1_13_ARRAY, wrapper.read(Types.ITEM1_13_2_ARRAY));\n }\n wrapper.write(Types.ITEM1_13, wrapper.read(Types.ITEM1_13_2));\n } else if (type.equals(\"crafting_shaped\")) {\n int ingredientsNo = wrapper.passthrough(Types.VAR_INT) * wrapper.passthrough(Types.VAR_INT);\n wrapper.passthrough(Types.STRING); // Group\n for (int i1 = 0; i1 < ingredientsNo; i1++) {\n wrapper.write(Types.ITEM1_13_ARRAY, wrapper.read(Types.ITEM1_13_2_ARRAY));\n }\n wrapper.write(Types.ITEM1_13, wrapper.read(Types.ITEM1_13_2));\n } else if (type.equals(\"smelting\")) {\n wrapper.passthrough(Types.STRING); // Group\n // Ingredient start\n wrapper.write(Types.ITEM1_13_ARRAY, wrapper.read(Types.ITEM1_13_2_ARRAY));\n // Ingredient end\n wrapper.write(Types.ITEM1_13, wrapper.read(Types.ITEM1_13_2));\n wrapper.passthrough(Types.FLOAT); // EXP\n wrapper.passthrough(Types.VAR_INT); // Cooking time\n }\n }\n });\n\n protocol.registerServerbound(ServerboundPackets1_13.CONTAINER_CLICK, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.BYTE); // 0 - Window ID\n map(Types.SHORT); // 1 - Slot\n map(Types.BYTE); // 2 - Button\n map(Types.SHORT); // 3 - Action number\n map(Types.VAR_INT); // 4 - Mode\n map(Types.ITEM1_13, Types.ITEM1_13_2); // 5 - Clicked Item\n }\n });\n\n protocol.registerServerbound(ServerboundPackets1_13.SET_CREATIVE_MODE_SLOT, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.SHORT); // 0 - Slot\n map(Types.ITEM1_13, Types.ITEM1_13_2); // 1 - Clicked Item\n }\n });\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_2to1_13_1/rewriter/WorldPacketRewriter1_13_2.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\npackage com.viaversion.viabackwards.protocol.v1_13_2to1_13_1.rewriter;\n\nimport com.viaversion.viabackwards.protocol.v1_13_2to1_13_1.Protocol1_13_2To1_13_1;\nimport com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;\nimport com.viaversion.viaversion.api.type.Types;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;\n\npublic class WorldPacketRewriter1_13_2 {\n\n public static void register(Protocol1_13_2To1_13_1 protocol) {\n protocol.registerClientbound(ClientboundPackets1_13.LEVEL_PARTICLES, new PacketHandlers() {\n @Override\n public void register() {\n map(Types.INT); // 0 - Particle ID\n map(Types.BOOLEAN); // 1 - Long Distance\n map(Types.FLOAT); // 2 - X\n map(Types.FLOAT); // 3 - Y\n map(Types.FLOAT); // 4 - Z\n map(Types.FLOAT); // 5 - Offset X\n map(Types.FLOAT); // 6 - Offset Y\n map(Types.FLOAT); // 7 - Offset Z\n map(Types.FLOAT); // 8 - Particle Data\n map(Types.INT); // 9 - Particle Count\n\n handler(wrapper -> {\n int id = wrapper.get(Types.INT, 0);\n if (id == 27) {\n wrapper.write(Types.ITEM1_13, wrapper.read(Types.ITEM1_13_2));\n }\n });\n }\n });\n }\n}\n"
},
{
"path": "common/src/main/java/com/viaversion/viabackwards/protocol/v1_13to1_12_2/Protocol1_13To1_12_2.java",
"content": "/*\n * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards\n * Copyright (C) 2016-2026 ViaVersion and contributors\n *\n * This program is free software: you can redistribute it and/or modify\n * it under the terms of the GNU General Public License as published by\n * the Free Software Foundation, either version 3 of the License, or\n * (at your option) any later version.\n *\n * This program is distributed in the hope that it will be useful,\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n * GNU General Public License for more details.\n *\n * You should have received a copy of the GNU General Public License\n * along with this program. If not, see .\n */\n\npackage com.viaversion.viabackwards.protocol.v1_13to1_12_2;\n\nimport com.viaversion.viabackwards.ViaBackwards;\nimport com.viaversion.viabackwards.api.BackwardsProtocol;\nimport com.viaversion.viabackwards.api.rewriters.text.JsonNBTComponentRewriter;\nimport com.viaversion.viabackwards.protocol.v1_13to1_12_2.data.BackwardsMappingData1_13;\nimport com.viaversion.viabackwards.protocol.v1_13to1_12_2.data.PaintingNames1_13;\nimport com.viaversion.viabackwards.protocol.v1_13to1_12_2.provider.BackwardsBlockEntityProvider;\nimport com.viaversion.viabackwards.protocol.v1_13to1_12_2.rewriter.BlockItemPacketRewriter1_13;\nimport com.viaversion.viabackwards.protocol.v1_13to1_12_2.rewriter.EntityPacketRewriter1_13;\nimport com.viaversion.viabackwards.protocol.v1_13to1_12_2.rewriter.PlayerPacketRewriter1_13;\nimport com.viaversion.viabackwards.protocol.v1_13to1_12_2.rewriter.SoundPacketRewriter1_13;\nimport com.viaversion.viabackwards.protocol.v1_13to1_12_2.storage.BackwardsBlockStorage;\nimport com.viaversion.viabackwards.protocol.v1_13to1_12_2.storage.NoteBlockStorage;\nimport com.viaversion.viabackwards.protocol.v1_13to1_12_2.storage.PlayerPositionStorage1_13;\nimport com.viaversion.viabackwards.protocol.v1_13to1_12_2.storage.TabCompleteStorage;\nimport com.viaversion.viabackwards.utils.BackwardsProtocolLogger;\nimport com.viaversion.viaversion.api.Via;\nimport com.viaversion.viaversion.api.connection.UserConnection;\nimport com.viaversion.viaversion.api.minecraft.ClientWorld;\nimport com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_13;\nimport com.viaversion.viaversion.api.protocol.packet.PacketWrapper;\nimport com.viaversion.viaversion.data.entity.EntityTrackerBase;\nimport com.viaversion.viaversion.libs.gson.JsonElement;\nimport com.viaversion.viaversion.libs.gson.JsonObject;\nimport com.viaversion.viaversion.libs.gson.JsonParser;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.Protocol1_12_2To1_13;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;\nimport com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ServerboundPackets1_13;\nimport com.viaversion.viaversion.protocols.v1_12to1_12_1.packet.ClientboundPackets1_12_1;\nimport com.viaversion.viaversion.protocols.v1_12to1_12_1.packet.ServerboundPackets1_12_1;\nimport com.viaversion.viaversion.rewriter.text.ComponentRewriterBase;\nimport com.viaversion.viaversion.util.ComponentUtil;\nimport com.viaversion.viaversion.util.ProtocolLogger;\nimport org.checkerframework.checker.nullness.qual.Nullable;\n\npublic class Protocol1_13To1_12_2 extends BackwardsProtocol {\n\n public static final BackwardsMappingData1_13 MAPPINGS = new BackwardsMappingData1_13();\n public static final ProtocolLogger LOGGER = new BackwardsProtocolLogger(Protocol1_13To1_12_2.class);\n private final EntityPacketRewriter1_13 entityRewriter = new EntityPacketRewriter1_13(this);\n private final BlockItemPacketRewriter1_13 blockItemPackets = new BlockItemPacketRewriter1_13(this);\n private final JsonNBTComponentRewriter translatableRewriter = new JsonNBTComponentRewriter<>(this, ComponentRewriterBase.ReadType.JSON) {\n @Override\n protected void handleTranslate(JsonObject root, String translate) {\n String mappedKey = mappedTranslationKey(translate);\n if (mappedKey != null || (mappedKey = getMappingData().getTranslateMappings().get(translate)) != null) {\n root.addProperty(\"translate\", mappedKey);\n }\n }\n };\n private final JsonNBTComponentRewriter