Implement https://github.com/ViaVersion/ViaFabricPlus/issues/146

2024-12-25 17:18:04 +01:00 · 2023-07-06 14:40:14 +02:00 · 2023-07-06 14:40:14 +02:00 · b39e8013a0
commit b39e8013a0
parent 6e9d5a4d05
9 changed files with 383 additions and 70 deletions
--- a/src/main/java/de/florianmichael/viafabricplus/definition/ScreenHandlerEmulator1_13_2.java
+++ b/src/main/java/de/florianmichael/viafabricplus/definition/ScreenHandlerEmulator1_13_2.java
@ -1,66 +0,0 @@
-/*
- * This file is part of ViaFabricPlus - https://github.com/FlorianMichael/ViaFabricPlus
- * Copyright (C) 2021-2023 FlorianMichael/EnZaXD and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package de.florianmichael.viafabricplus.definition;
-
-import com.viaversion.viaversion.api.type.Type;
-import com.viaversion.viaversion.libs.gson.JsonElement;
-import de.florianmichael.viafabricplus.ViaFabricPlus;
-import net.minecraft.client.MinecraftClient;
-import net.minecraft.client.gui.screen.ingame.HandledScreens;
-import net.minecraft.network.PacketByteBuf;
-import net.minecraft.resource.featuretoggle.FeatureFlags;
-import net.minecraft.screen.GenericContainerScreenHandler;
-import net.minecraft.screen.ScreenHandlerType;
-import net.minecraft.text.Text;
-
-import java.util.LinkedHashMap;
-import java.util.Map;
-import java.util.function.Consumer;
-
-public class ScreenHandlerEmulator1_13_2 {
-    public final static Consumer<PacketByteBuf> OLD_PACKET_HANDLER = data -> {
-        final var byteBuf = data.asByteBuf();
-
-        try {
-            ScreenHandlerEmulator1_13_2.handle(Type.SHORT.readPrimitive(byteBuf), Type.COMPONENT.read(byteBuf), Type.SHORT.readPrimitive(byteBuf));
-        } catch (Exception e) {
-            ViaFabricPlus.LOGGER.error("Failed to open custom ScreenHandler with dimension 9xN", e);
-        }
-    };
-
-    private final static Map<Integer, ScreenHandlerType<GenericContainerScreenHandler>> fakeHandlers = new LinkedHashMap<>();
-
-    static {
-        for (int i = 0; i < 1000; i++) {
-            int finalI = i;
-            fakeHandlers.put(i, new ScreenHandlerType<>((syncId, playerInventory) -> new GenericContainerScreenHandler(fakeHandlers.get(finalI), syncId, playerInventory, finalI), FeatureFlags.VANILLA_FEATURES));
-        }
-    }
-
-    public static void handle(final short windowID, final JsonElement title, final short slots) {
-        int n = slots / 9;
-        final int modulo = slots % 9;
-        if (modulo > 0) n++;
-
-        HandledScreens.open(ScreenHandlerEmulator1_13_2.fakeHandlers.get(n), MinecraftClient.getInstance(), windowID, Text.Serializer.fromJson(title.toString()));
-    }
-
-    public static boolean isFakeHandler(final ScreenHandlerType<?> screenHandlerType) {
-        return fakeHandlers.containsValue(screenHandlerType);
-    }
-}
--- a/src/main/java/de/florianmichael/viafabricplus/definition/screen/CustomScreenHandler.java
+++ b/src/main/java/de/florianmichael/viafabricplus/definition/screen/CustomScreenHandler.java
@ -0,0 +1,83 @@
+/*
+ * This file is part of ViaFabricPlus - https://github.com/FlorianMichael/ViaFabricPlus
+ * Copyright (C) 2021-2023 FlorianMichael/EnZaXD and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package de.florianmichael.viafabricplus.definition.screen;
+
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.libs.gson.JsonElement;
+import de.florianmichael.viafabricplus.ViaFabricPlus;
+import de.florianmichael.viafabricplus.definition.screen.netminecraft.LegacySmithingScreenHandler;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.gui.screen.ingame.HandledScreens;
+import net.minecraft.network.PacketByteBuf;
+import net.minecraft.resource.featuretoggle.FeatureFlags;
+import net.minecraft.screen.GenericContainerScreenHandler;
+import net.minecraft.screen.ScreenHandler;
+import net.minecraft.screen.ScreenHandlerType;
+import net.minecraft.text.Text;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.function.Consumer;
+
+public class CustomScreenHandler {
+    public final static Consumer<PacketByteBuf> TRIPLE_CHEST_HANDLER = data -> {
+        final var byteBuf = data.asByteBuf();
+
+        try {
+            CustomScreenHandler.handleTripleChestHandler(Type.SHORT.readPrimitive(byteBuf), Type.COMPONENT.read(byteBuf), Type.SHORT.readPrimitive(byteBuf));
+        } catch (Exception e) {
+            ViaFabricPlus.LOGGER.error("Failed to open custom ScreenHandler with dimension 9xN", e);
+        }
+    };
+
+    public final static Consumer<PacketByteBuf> LEGACY_SMITHING_HANDLER = data -> {
+        final var byteBuf = data.asByteBuf();
+
+        try {
+            CustomScreenHandler.openLegacySmithingScreen(Type.VAR_INT.readPrimitive(byteBuf), Type.COMPONENT.read(byteBuf));
+        } catch (Exception e) {
+            ViaFabricPlus.LOGGER.error("Failed to open legacy smithing table", e);
+        }
+    };
+
+    public final static ScreenHandlerType<LegacySmithingScreenHandler> LEGACY_SMITHING = new ScreenHandlerType<>(LegacySmithingScreenHandler::new, FeatureFlags.VANILLA_FEATURES);
+    private final static Map<Integer, ScreenHandlerType<ScreenHandler>> TRIPLE_CHEST_HANDLERS = new LinkedHashMap<>();
+
+    static {
+        for (int i = 0; i < 1000; i++) {
+            int finalI = i;
+            TRIPLE_CHEST_HANDLERS.put(i, new ScreenHandlerType<>((syncId, playerInventory) -> new GenericContainerScreenHandler(TRIPLE_CHEST_HANDLERS.get(finalI), syncId, playerInventory, finalI), FeatureFlags.VANILLA_FEATURES));
+        }
+    }
+
+    public static void openLegacySmithingScreen(final int windowID, final JsonElement title) {
+        HandledScreens.open(CustomScreenHandler.LEGACY_SMITHING, MinecraftClient.getInstance(), windowID, Text.Serializer.fromJson(title.toString()));
+    }
+
+    public static void handleTripleChestHandler(final short windowID, final JsonElement title, final short slots) {
+        int n = slots / 9;
+        final int modulo = slots % 9;
+        if (modulo > 0) n++;
+
+        HandledScreens.open(CustomScreenHandler.TRIPLE_CHEST_HANDLERS.get(n), MinecraftClient.getInstance(), windowID, Text.Serializer.fromJson(title.toString()));
+    }
+
+    public static boolean isTripleChestHandler(final ScreenHandlerType<?> screenHandlerType) {
+        return TRIPLE_CHEST_HANDLERS.containsValue(screenHandlerType);
+    }
+}
--- a/src/main/java/de/florianmichael/viafabricplus/definition/screen/netminecraft/LegacySmithingRecipe.java
+++ b/src/main/java/de/florianmichael/viafabricplus/definition/screen/netminecraft/LegacySmithingRecipe.java
@ -0,0 +1,102 @@
+package de.florianmichael.viafabricplus.definition.screen.netminecraft;
+
+import com.google.gson.JsonObject;
+import java.util.stream.Stream;
+import net.minecraft.inventory.Inventory;
+import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NbtCompound;
+import net.minecraft.network.PacketByteBuf;
+import net.minecraft.recipe.Ingredient;
+import net.minecraft.recipe.RecipeSerializer;
+import net.minecraft.recipe.ShapedRecipe;
+import net.minecraft.recipe.SmithingRecipe;
+import net.minecraft.registry.DynamicRegistryManager;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.JsonHelper;
+import net.minecraft.world.World;
+
+public class LegacySmithingRecipe implements SmithingRecipe {
+    public final static Serializer SERIALIZER = new Serializer();
+    final Ingredient base;
+    final Ingredient addition;
+    final ItemStack result;
+    private final Identifier id;
+
+    public LegacySmithingRecipe(Identifier id, Ingredient base, Ingredient addition, ItemStack result) {
+        this.id = id;
+        this.base = base;
+        this.addition = addition;
+        this.result = result;
+    }
+
+    public boolean matches(Inventory inventory, World world) {
+        return this.base.test(inventory.getStack(0)) && this.addition.test(inventory.getStack(1));
+    }
+
+    public ItemStack craft(Inventory inventory, DynamicRegistryManager registryManager) {
+        ItemStack itemStack = this.result.copy();
+        NbtCompound nbtCompound = inventory.getStack(0).getNbt();
+        if (nbtCompound != null) {
+            itemStack.setNbt(nbtCompound.copy());
+        }
+
+        return itemStack;
+    }
+
+    public boolean fits(int width, int height) {
+        return width * height >= 2;
+    }
+
+    public ItemStack getOutput(DynamicRegistryManager registryManager) {
+        return this.result;
+    }
+
+    public boolean testTemplate(ItemStack stack) {
+        return false;
+    }
+
+    public boolean testBase(ItemStack stack) {
+        return this.base.test(stack);
+    }
+
+    public boolean testAddition(ItemStack stack) {
+        return this.addition.test(stack);
+    }
+
+    public Identifier getId() {
+        return this.id;
+    }
+
+    public RecipeSerializer<?> getSerializer() {
+        return SERIALIZER;
+    }
+
+    public boolean isEmpty() {
+        return Stream.of(this.base, this.addition).anyMatch((ingredient) -> ingredient.getMatchingStacks().length == 0);
+    }
+
+    public static class Serializer implements RecipeSerializer<LegacySmithingRecipe> {
+        public Serializer() {
+        }
+
+        public LegacySmithingRecipe read(Identifier identifier, JsonObject jsonObject) {
+            Ingredient ingredient = Ingredient.fromJson(JsonHelper.getObject(jsonObject, "base"));
+            Ingredient ingredient2 = Ingredient.fromJson(JsonHelper.getObject(jsonObject, "addition"));
+            ItemStack itemStack = ShapedRecipe.outputFromJson(JsonHelper.getObject(jsonObject, "result"));
+            return new LegacySmithingRecipe(identifier, ingredient, ingredient2, itemStack);
+        }
+
+        public LegacySmithingRecipe read(Identifier identifier, PacketByteBuf packetByteBuf) {
+            Ingredient ingredient = Ingredient.fromPacket(packetByteBuf);
+            Ingredient ingredient2 = Ingredient.fromPacket(packetByteBuf);
+            ItemStack itemStack = packetByteBuf.readItemStack();
+            return new LegacySmithingRecipe(identifier, ingredient, ingredient2, itemStack);
+        }
+
+        public void write(PacketByteBuf packetByteBuf, LegacySmithingRecipe legacySmithingRecipe) {
+            legacySmithingRecipe.base.write(packetByteBuf);
+            legacySmithingRecipe.addition.write(packetByteBuf);
+            packetByteBuf.writeItemStack(legacySmithingRecipe.result);
+        }
+    }
+}
--- a/src/main/java/de/florianmichael/viafabricplus/definition/screen/netminecraft/LegacySmithingScreen.java
+++ b/src/main/java/de/florianmichael/viafabricplus/definition/screen/netminecraft/LegacySmithingScreen.java
@ -0,0 +1,24 @@
+package de.florianmichael.viafabricplus.definition.screen.netminecraft;
+
+import net.minecraft.client.gui.DrawContext;
+import net.minecraft.client.gui.screen.ingame.ForgingScreen;
+import net.minecraft.entity.player.PlayerInventory;
+import net.minecraft.text.Text;
+import net.minecraft.util.Identifier;
+
+public class LegacySmithingScreen extends ForgingScreen<LegacySmithingScreenHandler> {
+    private static final Identifier TEXTURE = new Identifier("textures/gui/container/legacy_smithing.png");
+
+    public LegacySmithingScreen(LegacySmithingScreenHandler handler, PlayerInventory playerInventory, Text title) {
+        super(handler, playerInventory, title, TEXTURE);
+        this.titleX = 60;
+        this.titleY = 18;
+    }
+
+    @Override
+    protected void drawInvalidRecipeArrow(DrawContext context, int x, int y) {
+        if ((this.handler.getSlot(0).hasStack() || this.handler.getSlot(1).hasStack()) && !this.handler.getSlot(this.handler.getResultSlotIndex()).hasStack()) {
+            context.drawTexture(TEXTURE, x + 99, y + 45, this.backgroundWidth, 0, 28, 21);
+        }
+    }
+}
--- a/src/main/java/de/florianmichael/viafabricplus/definition/screen/netminecraft/LegacySmithingScreenHandler.java
+++ b/src/main/java/de/florianmichael/viafabricplus/definition/screen/netminecraft/LegacySmithingScreenHandler.java
@ -0,0 +1,106 @@
+package de.florianmichael.viafabricplus.definition.screen.netminecraft;
+
+import de.florianmichael.viafabricplus.definition.screen.CustomScreenHandler;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.entity.player.PlayerInventory;
+import net.minecraft.item.ItemStack;
+import net.minecraft.recipe.RecipeType;
+import net.minecraft.screen.ForgingScreenHandler;
+import net.minecraft.screen.ScreenHandlerContext;
+import net.minecraft.screen.slot.ForgingSlotsManager;
+import net.minecraft.screen.slot.Slot;
+import net.minecraft.world.World;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collections;
+import java.util.List;
+
+public class LegacySmithingScreenHandler extends ForgingScreenHandler {
+    private final World world;
+
+    @Nullable
+    private LegacySmithingRecipe currentRecipe;
+    private final List<LegacySmithingRecipe> recipes;
+
+    public LegacySmithingScreenHandler(int syncId, PlayerInventory playerInventory) {
+        this(syncId, playerInventory, ScreenHandlerContext.EMPTY);
+    }
+
+    public LegacySmithingScreenHandler(int syncId, PlayerInventory playerInventory, ScreenHandlerContext context) {
+        super(CustomScreenHandler.LEGACY_SMITHING, syncId, playerInventory, context);
+        this.world = playerInventory.player.getWorld();
+        this.recipes = this.world.getRecipeManager().listAllOfType(RecipeType.SMITHING).stream().filter((recipe) -> {
+            return recipe instanceof LegacySmithingRecipe;
+        }).map((recipe) -> {
+            return (LegacySmithingRecipe)recipe;
+        }).toList();
+    }
+
+    protected ForgingSlotsManager getForgingSlotsManager() {
+        return ForgingSlotsManager.create().input(0, 27, 47, (stack) -> {
+            return true;
+        }).input(1, 76, 47, (stack) -> {
+            return true;
+        }).output(2, 134, 47).build();
+    }
+
+    protected boolean canUse(BlockState state) {
+        return state.isOf(Blocks.SMITHING_TABLE);
+    }
+
+    protected boolean canTakeOutput(PlayerEntity player, boolean present) {
+        return this.currentRecipe != null && this.currentRecipe.matches(this.input, this.world);
+    }
+
+    protected void onTakeOutput(PlayerEntity player, ItemStack stack) {
+        stack.onCraft(player.getWorld(), player, stack.getCount());
+        this.output.unlockLastRecipe(player, Collections.emptyList());
+        this.decrementStack(0);
+        this.decrementStack(1);
+        this.context.run((world, pos) -> {
+            world.syncWorldEvent(1044, pos, 0);
+        });
+    }
+
+    private void decrementStack(int slot) {
+        ItemStack itemStack = this.input.getStack(slot);
+        itemStack.decrement(1);
+        this.input.setStack(slot, itemStack);
+    }
+
+    public void updateResult() {
+        List<LegacySmithingRecipe> list = this.world.getRecipeManager().getAllMatches(RecipeType.SMITHING, this.input, this.world).stream().filter((recipe) -> {
+            return recipe instanceof LegacySmithingRecipe;
+        }).map((recipe) -> {
+            return (LegacySmithingRecipe)recipe;
+        }).toList();
+        if (list.isEmpty()) {
+            this.output.setStack(0, ItemStack.EMPTY);
+        } else {
+            LegacySmithingRecipe legacySmithingRecipe = (LegacySmithingRecipe)list.get(0);
+            ItemStack itemStack = legacySmithingRecipe.craft(this.input, this.world.getRegistryManager());
+            if (itemStack.isItemEnabled(this.world.getEnabledFeatures())) {
+                this.currentRecipe = legacySmithingRecipe;
+                this.output.setLastRecipe(legacySmithingRecipe);
+                this.output.setStack(0, itemStack);
+            }
+        }
+
+    }
+
+    public int getSlotFor(ItemStack stack) {
+        return this.testAddition(stack) ? 1 : 0;
+    }
+
+    protected boolean testAddition(ItemStack stack) {
+        return this.recipes.stream().anyMatch((recipe) -> {
+            return recipe.testAddition(stack);
+        });
+    }
+
+    public boolean canInsertIntoSlot(ItemStack stack, Slot slot) {
+        return slot.inventory != this.output && super.canInsertIntoSlot(stack, slot);
+    }
+}
--- a/src/main/java/de/florianmichael/viafabricplus/injection/mixin/fixes/minecraft/MixinHandledScreens.java
+++ b/src/main/java/de/florianmichael/viafabricplus/injection/mixin/fixes/minecraft/MixinHandledScreens.java
@ -17,7 +17,9 @@
 */
 package de.florianmichael.viafabricplus.injection.mixin.fixes.minecraft;

-import de.florianmichael.viafabricplus.definition.ScreenHandlerEmulator1_13_2;
+import de.florianmichael.viafabricplus.definition.screen.netminecraft.LegacySmithingScreen;
+import de.florianmichael.viafabricplus.definition.screen.netminecraft.LegacySmithingScreenHandler;
+import de.florianmichael.viafabricplus.definition.screen.CustomScreenHandler;
 import de.florianmichael.viafabricplus.protocolhack.ProtocolHack;
 import net.minecraft.client.gui.screen.ingame.GenericContainerScreen;
 import net.minecraft.client.gui.screen.ingame.HandledScreens;
@ -36,7 +38,10 @@ public class MixinHandledScreens {

    @Inject(method = "getProvider", at = @At("HEAD"), cancellable = true)
    private static <T extends ScreenHandler> void returnFakeProvider(ScreenHandlerType<T> type, CallbackInfoReturnable<HandledScreens.@Nullable Provider> cir) {
-        if (ProtocolHack.getTargetVersion().isOlderThanOrEqualTo(VersionEnum.r1_13_2) && ScreenHandlerEmulator1_13_2.isFakeHandler(type)) {
+        if (ProtocolHack.getTargetVersion().isOlderThanOrEqualTo(VersionEnum.r1_20tor1_20_1) && type == CustomScreenHandler.LEGACY_SMITHING) {
+            cir.setReturnValue((handler, playerInventory, title) -> new LegacySmithingScreen((LegacySmithingScreenHandler) handler, playerInventory, title));
+        }
+        if (ProtocolHack.getTargetVersion().isOlderThanOrEqualTo(VersionEnum.r1_13_2) && CustomScreenHandler.isTripleChestHandler(type)) {
            cir.setReturnValue((handler, playerInventory, title) -> new GenericContainerScreen((GenericContainerScreenHandler) handler, playerInventory, title));
        }
    }
--- a/src/main/java/de/florianmichael/viafabricplus/injection/mixin/fixes/viaversion/protocol1_14to1_13_2/MixinInventoryPackets.java
+++ b/src/main/java/de/florianmichael/viafabricplus/injection/mixin/fixes/viaversion/protocol1_14to1_13_2/MixinInventoryPackets.java
@ -28,7 +28,7 @@ import com.viaversion.viaversion.libs.gson.JsonElement;
 import com.viaversion.viaversion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
 import com.viaversion.viaversion.protocols.protocol1_14to1_13_2.packets.InventoryPackets;
 import de.florianmichael.viafabricplus.definition.PacketSyncBase;
-import de.florianmichael.viafabricplus.definition.ScreenHandlerEmulator1_13_2;
+import de.florianmichael.viafabricplus.definition.screen.CustomScreenHandler;
 import de.florianmichael.viafabricplus.protocolhack.ProtocolHack;
 import io.netty.buffer.Unpooled;
 import net.minecraft.SharedConstants;
@ -64,7 +64,7 @@ public class MixinInventoryPackets {
                fakeOpenWindow.read(Type.VAR_INT);
                fakeOpenWindow.read(Type.VAR_INT);

-                final String uuid = PacketSyncBase.track(ScreenHandlerEmulator1_13_2.OLD_PACKET_HANDLER);
+                final String uuid = PacketSyncBase.track(CustomScreenHandler.TRIPLE_CHEST_HANDLER);

                wrapper.write(Type.STRING, uuid);
                wrapper.write(Type.SHORT, windowId);
--- a/src/main/java/de/florianmichael/viafabricplus/injection/mixin/fixes/viaversion/protocol1_20to1_19_4/MixinInventoryPackets.java
+++ b/src/main/java/de/florianmichael/viafabricplus/injection/mixin/fixes/viaversion/protocol1_20to1_19_4/MixinInventoryPackets.java
@ -0,0 +1,58 @@
+/*
+ * This file is part of ViaFabricPlus - https://github.com/FlorianMichael/ViaFabricPlus
+ * Copyright (C) 2021-2023 FlorianMichael/EnZaXD and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package de.florianmichael.viafabricplus.injection.mixin.fixes.viaversion.protocol1_20to1_19_4;
+
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.protocols.protocol1_19_4to1_19_3.ClientboundPackets1_19_4;
+import com.viaversion.viaversion.protocols.protocol1_19_4to1_19_3.ServerboundPackets1_19_4;
+import com.viaversion.viaversion.protocols.protocol1_20to1_19_4.Protocol1_20To1_19_4;
+import com.viaversion.viaversion.protocols.protocol1_20to1_19_4.packets.InventoryPackets;
+import com.viaversion.viaversion.rewriter.ItemRewriter;
+import de.florianmichael.viafabricplus.definition.PacketSyncBase;
+import de.florianmichael.viafabricplus.definition.screen.CustomScreenHandler;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(value = InventoryPackets.class, remap = false)
+public class MixinInventoryPackets extends ItemRewriter<ClientboundPackets1_19_4, ServerboundPackets1_19_4, Protocol1_20To1_19_4> {
+
+    public MixinInventoryPackets(Protocol1_20To1_19_4 protocol) {
+        super(protocol);
+    }
+
+    @Inject(method = "registerPackets", at = @At("RETURN"))
+    public void handleLegacySmithingScreen(CallbackInfo ci) {
+        protocol.registerClientbound(ClientboundPackets1_19_4.OPEN_WINDOW, wrapper -> {
+            final var windowId = wrapper.read(Type.VAR_INT);
+            final int typeId = wrapper.read(Type.VAR_INT);
+            var title = wrapper.read(Type.COMPONENT);
+
+            if (typeId == 20) {
+                wrapper.clearPacket();
+                wrapper.setPacketType(ClientboundPackets1_19_4.PLUGIN_MESSAGE);
+
+                wrapper.write(Type.STRING, PacketSyncBase.PACKET_SYNC_IDENTIFIER);
+                wrapper.write(Type.STRING, PacketSyncBase.track(CustomScreenHandler.LEGACY_SMITHING_HANDLER));
+                wrapper.write(Type.VAR_INT, windowId);
+                wrapper.write(Type.COMPONENT, title);
+            }
+        });
+    }
+}
--- a/src/main/resources/viafabricplus.mixins.json
+++ b/src/main/resources/viafabricplus.mixins.json
@ -160,6 +160,7 @@
    "fixes.viaversion.protocol1_19_1to1_19.MixinProtocol1_19_1To1_19",
    "fixes.viaversion.protocol1_19_3to1_19_1.MixinProtocol1_19_3To1_19_1",
    "fixes.viaversion.protocol1_19to1_18_2.MixinWorldPackets",
+    "fixes.viaversion.protocol1_20to1_19_4.MixinInventoryPackets",
    "fixes.viaversion.protocol1_9_1to1_9.MixinProtocol1_9_1To1_9",
    "fixes.viaversion.protocol1_9to1_8.MixinChunk1_8Type",
    "fixes.viaversion.protocol1_9to1_8.MixinCommandBlockProvider",