85 lines
2.6 KiB
Java
85 lines
2.6 KiB
Java
package pm.c7.scout.mixin.client;
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import org.objectweb.asm.tree.*;
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import org.quiltmc.loader.api.QuiltLoader;
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import pm.c7.scout.mixinsupport.ClassNodeTransformer;
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import static org.objectweb.asm.Opcodes.*;
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public class HandledScreenTransformer implements ClassNodeTransformer {
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@Override
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public void transform(String name, ClassNode node) {
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var resolver = QuiltLoader.getMappingResolver();
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var namespace = "intermediary";
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var drawSlot = resolver.mapMethodName(namespace, name, "method_2385", "(Lnet/minecraft/class_332;Lnet/minecraft/class_1735;)V");
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var Slot = resolver.mapClassName(namespace, "net.minecraft.class_1735");
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var y = resolver.mapFieldName(namespace, Slot, "field_7872", "I");
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Slot = slash(Slot);
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for (var mn : node.methods) {
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if (mn.name.equals(drawSlot)) {
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for (var insn : mn.instructions) {
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if (insn instanceof FieldInsnNode fin) {
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if (fin.getOpcode() == GETFIELD) {
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if(fin.owner.equals(Slot) && fin.name.equals(y)) {
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if (fin.getNext() instanceof VarInsnNode vin && vin.getOpcode() == ISTORE) {
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LabelNode LnotBag = new LabelNode();
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int SAFE_REGISTER = 20;
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mn.instructions.insert(vin, insns(
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ALOAD(2),
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INSTANCEOF("pm/c7/scout/screen/BagSlot"),
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IFEQ(LnotBag),
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ALOAD(2),
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CHECKCAST("pm/c7/scout/screen/BagSlot"),
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ASTORE(SAFE_REGISTER),
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ALOAD(SAFE_REGISTER),
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INVOKEVIRTUAL("pm/c7/scout/screen/BagSlot", "getX", "()I"),
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ISTORE(vin.var - 1),
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ALOAD(SAFE_REGISTER),
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INVOKEVIRTUAL("pm/c7/scout/screen/BagSlot", "getY", "()I"),
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ISTORE(vin.var),
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LnotBag
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));
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}
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}
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}
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}
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}
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}
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}
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}
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private String slash(String clazz) {
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return clazz.replaceAll("\\.", "/");
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}
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private InsnList insns(AbstractInsnNode... insns) {
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var li = new InsnList();
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for (var i : insns) li.add(i);
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return li;
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}
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private static JumpInsnNode IFEQ(LabelNode v) {
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return new JumpInsnNode(IFEQ, v);
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}
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private static VarInsnNode ALOAD(int v) {
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return new VarInsnNode(ALOAD, v);
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}
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private static VarInsnNode ASTORE(int v) {
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return new VarInsnNode(ASTORE, v);
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}
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private static TypeInsnNode INSTANCEOF(String desc) {
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return new TypeInsnNode(INSTANCEOF, desc);
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}
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private static TypeInsnNode CHECKCAST(String desc) {
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return new TypeInsnNode(CHECKCAST, desc);
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}
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private static MethodInsnNode INVOKEVIRTUAL(String owner, String name, String desc) {
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return new MethodInsnNode(INVOKEVIRTUAL, owner, name, desc);
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}
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private static VarInsnNode ISTORE(int v) {
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return new VarInsnNode(ISTORE, v);
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}
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}
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