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feat(coremod): fishing rod cast event
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@WakelessSloth56
WakelessSloth56 committed Feb 13, 2024
1 parent 8f65bea commit 314d1dc
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Showing 3 changed files with 162 additions and 2 deletions.
4 changes: 3 additions & 1 deletion src/main/java/org/auioc/mcmod/arnicalib/mod/server/event/AHServerEventFactory.java
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Original file line number Diff line number Diff line change
Expand Up @@ -73,7 +73,9 @@ public static void preProjectileWeaponRelease(LivingEntity living, ItemStack wea
BUS.post(new ProjectileWeaponReleaseEvent(living, weapon, projectile));
}


/**
* @see <code>coremod: arnicalib.fishing_rod_item.use<code/>
*/
public static FishingRodCastEvent preFishingRodCast(Player player, ItemStack fishingRod, int speedBonus, int luckBonus) {
var event = new FishingRodCastEvent((ServerPlayer) player, fishingRod, speedBonus, luckBonus);
return BUS.post(event);
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3 changes: 2 additions & 1 deletion src/main/resources/META-INF/coremods.json
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
{
"arnicalib.cross_bow_item.shoot_projectile": "coremods/cross_bow_item.shoot_projectile.js"
"arnicalib.cross_bow_item.shoot_projectile": "coremods/cross_bow_item.shoot_projectile.js",
"arnicalib.fishing_rod_item.use": "coremods/fishing_rod_item.use.js"
}
157 changes: 157 additions & 0 deletions src/main/resources/coremods/fishing_rod_item.use.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,157 @@
function initializeCoreMod() {
var ASMAPI = Java.type('net.neoforged.coremod.api.ASMAPI');
var Opcodes = Java.type('org.objectweb.asm.Opcodes');
var InsnList = Java.type('org.objectweb.asm.tree.InsnList');
var VarInsnNode = Java.type('org.objectweb.asm.tree.VarInsnNode');
var MethodInsnNode = Java.type('org.objectweb.asm.tree.MethodInsnNode');
var LabelNode = Java.type('org.objectweb.asm.tree.LabelNode');
var LocalVariableNode = Java.type('org.objectweb.asm.tree.LocalVariableNode');

return {
'FishingRodItem#use': {
target: {
type: 'METHOD',
class: 'net.minecraft.world.item.FishingRodItem',
methodName: 'use',
methodDesc: '(Lnet/minecraft/world/level/Level;Lnet/minecraft/world/entity/player/Player;Lnet/minecraft/world/InteractionHand;)Lnet/minecraft/world/InteractionResultHolder;',
},
transformer: function (methodNode) {
var toInject = new InsnList();
{
var fn_start = new LabelNode();
var fn_end = new LabelNode();

methodNode.localVariables.add(
new LocalVariableNode(
'event',
'Lorg/auioc/mcmod/arnicalib/game/event/server/FishingRodCastEvent;',
null,
fn_start,
fn_end,
7
)
);

toInject.add(fn_start);
toInject.add(new VarInsnNode(Opcodes.ALOAD, 2));
toInject.add(new VarInsnNode(Opcodes.ALOAD, 4));
toInject.add(new VarInsnNode(Opcodes.ILOAD, 5));
toInject.add(new VarInsnNode(Opcodes.ILOAD, 6));
toInject.add(
new MethodInsnNode(
Opcodes.INVOKESTATIC,
'org/auioc/mcmod/arnicalib/mod/server/event/AHServerEventFactory',
'preFishingRodCast',
'(Lnet/minecraft/world/entity/player/Player;Lnet/minecraft/world/item/ItemStack;II)Lorg/auioc/mcmod/arnicalib/game/event/server/FishingRodCastEvent;',
false
)
);
toInject.add(new VarInsnNode(Opcodes.ASTORE, 7));
toInject.add(new VarInsnNode(Opcodes.ALOAD, 7));
toInject.add(
new MethodInsnNode(
Opcodes.INVOKEVIRTUAL,
'org/auioc/mcmod/arnicalib/game/event/server/FishingRodCastEvent',
'getSpeedBonus',
'()I',
false
)
);
toInject.add(new VarInsnNode(Opcodes.ISTORE, 5));
toInject.add(new VarInsnNode(Opcodes.ALOAD, 7));
toInject.add(
new MethodInsnNode(
Opcodes.INVOKEVIRTUAL,
'org/auioc/mcmod/arnicalib/game/event/server/FishingRodCastEvent',
'getLuckBonus',
'()I',
false
)
);
toInject.add(new VarInsnNode(Opcodes.ISTORE, 6));
toInject.add(fn_end);
}

var at = methodNode.instructions.get(
methodNode.instructions.indexOf(
ASMAPI.findFirstInstructionBefore(
methodNode,
Opcodes.NEW,
0
)
) - 1
);
methodNode.instructions.insertBefore(at, toInject);

methodNode.visitMaxs(14, 8);

// print(ASMAPI.methodNodeToString(methodNode));
return methodNode;
},
},
};
}

//! LocalVariableTable
/*
Slot Name Signature
5 k I
6 j I
0 this Lnet/minecraft/world/item/FishingRodItem;
2 pPlayer Lnet/minecraft/world/entity/player/Player;
4 itemstack Lnet/minecraft/world/item/ItemStack;
+ 7 event Lorg/auioc/mcmod/hulsealib/game/event/server/PreFishingRodCastEvent;
*/

//! Code
/*
public InteractionResultHolder<ItemStack> use(Level pLevel, Player pPlayer, InteractionHand pHand) {
ItemStack itemstack = pPlayer.getItemInHand(pHand);
if (pPlayer.fishing != null) {
//_ ...
} else {
//_ ...
if (!pLevel.isClientSide) {
int k = EnchantmentHelper.getFishingSpeedBonus(itemstack);
int j = EnchantmentHelper.getFishingLuckBonus(itemstack);
+ var event = org.auioc.mcmod.arnicalib.mod.server.event.AHServerEventFactory.preFishingRodCast(pPlayer, itemstack, k, j);
+ k = event.getSpeedBonus();
+ j = event.getLuckBonus();
pLevel.addFreshEntity(new FishingHook(pPlayer, pLevel, j, k));
}
//_ ...
}
//_ ...
}
* ========== ByteCode ========== *
//_ ...
L24
LINENUMBER 58 L24
ALOAD 4
INVOKESTATIC net/minecraft/world/item/enchantment/EnchantmentHelper.getFishingSpeedBonus (Lnet/minecraft/world/item/ItemStack;)I
ISTORE 5
L25
LINENUMBER 59 L25
ALOAD 4
INVOKESTATIC net/minecraft/world/item/enchantment/EnchantmentHelper.getFishingLuckBonus (Lnet/minecraft/world/item/ItemStack;)I
ISTORE 6
L26
LINENUMBER 60 L26
+ L27
+ ALOAD 2
+ ALOAD 4
+ ILOAD 5
+ ILOAD 6
+ INVOKESTATIC org/auioc/mcmod/arnicalib/mod/server/event/AHServerEventFactory.preFishingRodCast (Lnet/minecraft/world/entity/player/Player;Lnet/minecraft/world/item/ItemStack;II)Lorg/auioc/mcmod/arnicalib/game/event/server/FishingRodCastEvent;
+ ASTORE 7
+ ALOAD 7
+ INVOKEVIRTUAL org/auioc/mcmod/arnicalib/game/event/server/FishingRodCastEvent.getSpeedBonus ()I
+ ISTORE 5
+ ALOAD 7
+ INVOKEVIRTUAL org/auioc/mcmod/arnicalib/game/event/server/FishingRodCastEvent.getLuckBonus ()I
+ ISTORE 6
+ L28
//_ ...
- MAXLOCALS = 7
+ MAXLOCALS = 8
*/

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