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Add PrepareRecipeEvent + a few extra goodies.
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+206
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4 files changed

+206
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‎loader/src/main/java/com/fox2code/foxloader/event/recipe/PrepareRecipeEvent.java‎

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/*
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* MIT License
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*
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* Copyright (c) 2023-2025 Fox2Code
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package com.fox2code.foxloader.event.recipe;
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import com.fox2code.foxevents.Event;
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import net.minecraft.common.block.container.Container;
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import net.minecraft.common.entity.inventory.InventoryCrafting;
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import net.minecraft.common.entity.player.EntityPlayer;
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import net.minecraft.common.item.ItemStack;
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import net.minecraft.common.recipe.IRecipe;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import java.util.Collections;
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import java.util.Objects;
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import java.util.Set;
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/**
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* Called when a recipe is being prepared.
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*/
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public final class PrepareRecipeEvent extends Event implements Event.Cancellable {
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private final IRecipe recipe;
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private final InventoryCrafting inventory;
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private ItemStack result;
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public PrepareRecipeEvent(@Nullable IRecipe recipe,@NotNull InventoryCrafting inventory,@Nullable ItemStack result) {
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this.recipe = recipe;
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this.inventory = Objects.requireNonNull(inventory, "inventory");
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this.result = result;
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}
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@Nullable public IRecipe getRecipe() {
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return this.recipe;
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}
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@NotNull public InventoryCrafting getInventory() {
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return this.inventory;
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}
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@Nullable public ItemStack getResult() {
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return this.result;
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}
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public void setResult(@Nullable ItemStack result) {
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this.result = result;
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}
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@Nullable public ItemStack getEffectiveResult() {
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return this.isCancelled() ? null : this.result;
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}
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/**
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* @return the current viewers of the crafting process, can be an empty set, especially on automated machines.
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*/
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@NotNull public Set<EntityPlayer> getRecipeViewers() {
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Container container = this.inventory.getCraftingContainer();
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Set<EntityPlayer> entityPlayers;
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if (container == null || (entityPlayers = container.getActiveViewers()) == null) {
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return Collections.emptySet();
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}
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return entityPlayers;
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}
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}

‎loader/src/main/java/com/fox2code/foxloader/internal/InternalRecipeHooks.java‎

Lines changed: 58 additions & 0 deletions
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/*
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* MIT License
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*
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* Copyright (c) 2023-2025 Fox2Code
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
7+
* of this software and associated documentation files (the "Software"), to deal
8+
* in the Software without restriction, including without limitation the rights
9+
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10+
* copies of the Software, and to permit persons to whom the Software is
11+
* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17+
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18+
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19+
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package com.fox2code.foxloader.internal;
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import com.fox2code.foxevents.EventHolder;
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import com.fox2code.foxloader.event.recipe.PrepareRecipeEvent;
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import net.minecraft.common.entity.inventory.InventoryCrafting;
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import net.minecraft.common.item.ItemStack;
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import net.minecraft.common.recipe.IRecipe;
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public final class InternalRecipeHooks {
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private static final EventHolder<PrepareRecipeEvent> PREPARE_RECIPE_EVENT =
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EventHolder.getHolderFromEvent(PrepareRecipeEvent.class);
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private InternalRecipeHooks() {}
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public static ItemStack onWorkbenchRecipe(ItemStack itemStack, InventoryCrafting inventoryCrafting) {
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if (PREPARE_RECIPE_EVENT.isEmpty()) {
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return itemStack;
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}
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PrepareRecipeEvent prepareRecipeEvent =
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new PrepareRecipeEvent(null, inventoryCrafting, itemStack);
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prepareRecipeEvent.callEvent();
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return prepareRecipeEvent.getEffectiveResult();
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}
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public static ItemStack onWorkbenchRecipe(IRecipe recipe, InventoryCrafting inventoryCrafting) {
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if (PREPARE_RECIPE_EVENT.isEmpty()) {
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return recipe.getCraftingResult(inventoryCrafting);
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}
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PrepareRecipeEvent prepareRecipeEvent =
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new PrepareRecipeEvent(recipe, inventoryCrafting,
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recipe.getCraftingResult(inventoryCrafting));
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prepareRecipeEvent.callEvent();
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return prepareRecipeEvent.getEffectiveResult();
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}
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}

‎patching/src/main/java/com/fox2code/foxloader/patching/game/ContainerPatch.java‎

Lines changed: 16 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -33,12 +33,16 @@ final class ContainerPatch extends GamePatch {
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private static final String ContainerManager = "com/fox2code/foxloader/container/ContainerManager";
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3535
ContainerPatch() {
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super(new String[]{EntityPlayer, EntityPlayerMP});
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super(new String[]{Container, EntityPlayer, EntityPlayerMP});
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}
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3939
@Override
4040
public ClassNode transform(ClassNode classNode) {
4141
switch (classNode.name) {
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case Container: {
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patchContainer(classNode);
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break;
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}
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case EntityPlayer: {
4347
patchEntityPlayer(classNode);
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break;
@@ -51,6 +55,17 @@ public ClassNode transform(ClassNode classNode) {
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return classNode;
5256
}
5357

58+
private void patchContainer(ClassNode classNode) {
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FieldNode fieldNode = TransformerUtils.getField(classNode, "playersList");
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MethodNode methodNode = new MethodNode(ACC_PUBLIC | ACC_FINAL,
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"getActiveViewers", "()" + fieldNode.desc, "()" + fieldNode.signature, null);
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methodNode.instructions.add(new VarInsnNode(ALOAD, 0));
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methodNode.instructions.add(new FieldInsnNode(GETFIELD,
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classNode.name, fieldNode.name, fieldNode.desc));
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methodNode.instructions.add(new InsnNode(ARETURN));
66+
classNode.methods.add(methodNode);
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}
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5469
private static void patchEntityPlayer(ClassNode classNode) {
5570
MethodNode openFoxLoaderContainer = new MethodNode(ACC_PUBLIC,
5671
"openFoxLoaderContainer", "(L" + Container + ";III)Z", null, null);

‎patching/src/main/java/com/fox2code/foxloader/patching/game/RecipesPatch.java‎

Lines changed: 48 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -31,20 +31,30 @@
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import java.util.Collections;
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final class RecipesPatch extends GamePatch {
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private static final String ItemStack = "net/minecraft/common/item/ItemStack";
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private static final String Items = "net/minecraft/common/item/Items";
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private static final String Container = "net/minecraft/common/block/container/Container";
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private static final String InventoryCrafting = "net/minecraft/common/entity/inventory/InventoryCrafting";
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private static final String IRecipe = "net/minecraft/common/recipe/IRecipe";
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private static final String ShapedRecipes = "net/minecraft/common/recipe/ShapedRecipes";
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private static final String ShapelessRecipes = "net/minecraft/common/recipe/ShapelessRecipes";
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private static final String CraftingManager = "net/minecraft/common/recipe/CraftingManager";
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private static final String RecipesDyes = "net/minecraft/common/recipe/RecipesDyes";
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private static final String TaggedIngredient = "net/minecraft/common/recipe/TaggedIngredient";
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private static final String FoxTaggedIngredients = "com/fox2code/foxloader/recipe/FoxTaggedIngredients";
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private static final String InternalRecipeHooks = "com/fox2code/foxloader/internal/InternalRecipeHooks";
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4147
RecipesPatch() {
42-
super(new String[]{ShapedRecipes, ShapelessRecipes, RecipesDyes});
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super(new String[]{InventoryCrafting, ShapedRecipes, ShapelessRecipes, CraftingManager, RecipesDyes});
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}
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4551
@Override
4652
public ClassNode transform(ClassNode classNode) {
4753
switch (classNode.name) {
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case InventoryCrafting: {
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patchInventoryCrafting(classNode);
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break;
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}
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case ShapedRecipes: {
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TransformerUtils.makeGetterForFields(classNode, "width", "height", "ingredients");
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break;
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TransformerUtils.makeGetterForFields(classNode, "ingredients");
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break;
5565
}
66+
case CraftingManager: {
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patchCraftingManager(classNode);
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break;
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}
5670
case RecipesDyes: {
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patchAllDyeRecipes(classNode);
5872
break;
@@ -61,6 +75,39 @@ public ClassNode transform(ClassNode classNode) {
6175
return classNode;
6276
}
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78+
private void patchInventoryCrafting(ClassNode classNode) {
79+
FieldNode fieldNode = TransformerUtils.getFieldDesc(classNode, "L" + Container + ";");
80+
MethodNode methodNode = new MethodNode(ACC_PUBLIC,
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"getCraftingContainer", "()" + fieldNode.desc, null, null);
82+
methodNode.instructions.add(new VarInsnNode(ALOAD, 0));
83+
methodNode.instructions.add(new FieldInsnNode(GETFIELD,
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classNode.name, fieldNode.name, fieldNode.desc));
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methodNode.instructions.add(new InsnNode(ARETURN));
86+
classNode.methods.add(methodNode);
87+
}
88+
89+
private void patchCraftingManager(ClassNode classNode) {
90+
MethodNode methodNode = TransformerUtils.getMethod(classNode, "findMatchingRecipe");
91+
for (AbstractInsnNode abstractInsnNode : methodNode.instructions.toArray()) {
92+
if (abstractInsnNode.getOpcode() == ARETURN) {
93+
AbstractInsnNode previous = abstractInsnNode.getPrevious();
94+
if (previous.getOpcode() == INVOKEINTERFACE &&
95+
((MethodInsnNode) previous).owner.equals(IRecipe)) {
96+
methodNode.instructions.remove(previous);
97+
methodNode.instructions.insertBefore(abstractInsnNode, new MethodInsnNode(
98+
INVOKESTATIC, InternalRecipeHooks, "onWorkbenchRecipe",
99+
"(L" + IRecipe + ";L" + InventoryCrafting + ";)L" + ItemStack + ";"));
100+
} else if (previous.getOpcode() != ACONST_NULL) {
101+
methodNode.instructions.insertBefore(
102+
abstractInsnNode, new VarInsnNode(ALOAD, 1));
103+
methodNode.instructions.insertBefore(abstractInsnNode, new MethodInsnNode(
104+
INVOKESTATIC, InternalRecipeHooks, "onWorkbenchRecipe",
105+
"(L" + ItemStack + ";L" + InventoryCrafting + ";)L" + ItemStack + ";"));
106+
}
107+
}
108+
}
109+
}
110+
64111
private static void patchAllDyeRecipes(ClassNode classNode) {
65112
for (MethodNode methodNode : classNode.methods) {
66113
ArrayList<StaticDyeOccurrence> staticDyeOccurrences = new ArrayList<>();

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