Fix remapping inherited/overriden members

src/main/java/org/ecorous/esnesnon/nonsense_remapper/NonsenseRemapper.java

@@ -1,18 +1,19 @@
 package org.ecorous.esnesnon.nonsense_remapper;
 
+import java.io.IOError;
 import java.io.IOException;
 import java.nio.file.*;
 import java.nio.file.attribute.BasicFileAttributes;
-import java.util.ArrayList;
+import java.util.*;
-import java.util.List;
-import java.util.Map;
 import java.util.concurrent.Callable;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
 import org.ecorous.esnesnon.nonsense_remapper.api.Mapper;
 import org.ecorous.esnesnon.nonsense_remapper.api.ParameterClassRemapper;
 import org.ecorous.esnesnon.nonsense_remapper.api.data.MappingData;
+import org.ecorous.esnesnon.nonsense_remapper.api.data.Member;
 import org.ecorous.esnesnon.nonsense_remapper.api.data.Parchment;
 import org.ecorous.esnesnon.nonsense_remapper.parser.ProguardParser;
 import org.ecorous.esnesnon.nonsense_remapper.provider.MojmapProvider;
@@ -20,24 +21,23 @@ import org.ecorous.esnesnon.nonsense_remapper.provider.ParchmentProvider;
 import org.objectweb.asm.ClassReader;
 import org.objectweb.asm.ClassVisitor;
 import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.Opcodes;
 import org.objectweb.asm.commons.ClassRemapper;
 
 public class NonsenseRemapper {
 
 	public static void run(String minecraftVersion, Path inputJar, Path outputJar, boolean skipMetaInf, boolean renameParameters) throws IOException, InterruptedException {
 		MappingData data = ProguardParser.read(MojmapProvider.get(minecraftVersion, outputJar.resolveSibling("client-" + minecraftVersion + ".txt")).orElseThrow()).reverse();
-		Mapper mapper = new Mapper(data);
-
 
 		Parchment paramMappings = null;
 		if (renameParameters) {
 			paramMappings = ParchmentProvider.getParchment(minecraftVersion, outputJar.getParent());
 		}
 
-		remap(mapper, inputJar, outputJar, skipMetaInf, paramMappings);
+		remap(data, inputJar, outputJar, skipMetaInf, paramMappings);
 	}
 
-	public static void remap(Mapper mapper, Path inputJar, Path outputJar, boolean skipMetaInf, Parchment paramMappings) throws IOException, InterruptedException {
+	public static void remap(MappingData data, Path inputJar, Path outputJar, boolean skipMetaInf, Parchment paramMappings) throws IOException, InterruptedException {
 		Files.deleteIfExists(outputJar);
 
 		System.out.println("Remapping...");
@@ -49,12 +49,35 @@ public class NonsenseRemapper {
 			 FileSystem outFs = FileSystems.newFileSystem(outputJar, Map.of("create", "true"))) {
 			List<Callable<Void>> tasks = new ArrayList<>();
 
+			Map<String, List<String>> lazyParents = new ConcurrentHashMap<>();
+			Mapper mapper = new Mapper(data, className -> lazyParents.computeIfAbsent(className, ignored -> {
+				try {
+					Path path = inFs.getPath("/" + className + ".class");
+					if (!Files.isRegularFile(path))
+						return List.of();
+
+					byte[] bytes = Files.readAllBytes(path);
+					ClassReader reader = new ClassReader(bytes);
+					List<String> superTypes = new ArrayList<>();
+					reader.accept(new ClassVisitor(Opcodes.ASM9) {
+						@Override
+						public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
+							superTypes.add(superName);
+							superTypes.addAll(Arrays.asList(interfaces));
+						}
+					}, ClassReader.SKIP_CODE | ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES);
+
+					return superTypes;
+				} catch (IOException error) {
+					throw new Error(error); // not our problem :^) for now
+				}
+			}));
+
 			Files.walkFileTree(inFs.getPath("/"), new SimpleFileVisitor<>() {
 				@Override
 				public FileVisitResult visitFile(Path path, BasicFileAttributes basicFileAttributes) {
-					if (skipMetaInf && path.startsWith("/META-INF")) {
+					if (skipMetaInf && path.startsWith("/META-INF"))
 						return FileVisitResult.SKIP_SUBTREE;
-					}
 
 					tasks.add(() -> {
 						try {

src/main/java/org/ecorous/esnesnon/nonsense_remapper/api/Mapper.java

@@ -4,12 +4,18 @@ import org.ecorous.esnesnon.nonsense_remapper.api.data.MappingData;
 import org.ecorous.esnesnon.nonsense_remapper.api.data.Member;
 import org.objectweb.asm.commons.Remapper;
 
+import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+
 public class Mapper extends Remapper {
 
 	private final MappingData data;
+	private final Function<String, List<String>> parentProvider;
 
-    public Mapper(MappingData data) {
+	public Mapper(MappingData data, Function<String, List<String>> parentProvider) {
 		this.data = data;
+		this.parentProvider = parentProvider;
 	}
 
 	@Override
@@ -19,11 +25,39 @@ public class Mapper extends Remapper {
 
 	@Override
 	public String mapMethodName(String owner, String name, String descriptor) {
-        return data.methods().getOrDefault(new Member(owner, name, descriptor), name);
+		String result = map(0, data.methods(), owner, name, descriptor);
+		if (result != null)
+			return result;
+
+		return name;
 	}
 
 	@Override
 	public String mapFieldName(String owner, String name, String descriptor) {
-        return data.fields().getOrDefault(new Member(owner, name, descriptor), name);
+		String result = map(0, data.fields(), owner, name, descriptor);
+		if (result != null)
+			return result;
+
+		return name;
+	}
+
+	private String map(int depth, Map<Member, String> map, String owner, String name, String descriptor) {
+		if (owner.startsWith("["))
+			return null;
+
+		String result = map.get(new Member(owner, name, descriptor));
+		if (result != null)
+			return result;
+
+		if (depth >= 64)
+			return null;
+
+		for (String parent : parentProvider.apply(owner)) {
+			result = map(depth + 1, map, parent, name, descriptor);
+			if (result != null)
+				return result;
+		}
+
+		return null;
 	}
 }