Add ExtendedRemapper type with support for moving fields/methods

Signed-off-by: Graham <gpe@openrs2.dev>

asm/src/main/java/dev/openrs2/asm/ClassNodeRemapper.kt

@@ -1,6 +1,6 @@
 package dev.openrs2.asm
 
-import org.objectweb.asm.commons.Remapper
+import dev.openrs2.asm.classpath.ExtendedRemapper
 import org.objectweb.asm.tree.AbstractInsnNode
 import org.objectweb.asm.tree.ClassNode
 import org.objectweb.asm.tree.FieldInsnNode
@@ -11,7 +11,7 @@ import org.objectweb.asm.tree.MethodInsnNode
 import org.objectweb.asm.tree.MultiANewArrayInsnNode
 import org.objectweb.asm.tree.TypeInsnNode
 
-fun ClassNode.remap(remapper: Remapper) {
+fun ClassNode.remap(remapper: ExtendedRemapper) {
     val originalName = name
     name = remapper.mapType(originalName)
     signature = remapper.mapSignature(signature, false)
@@ -45,18 +45,18 @@ fun ClassNode.remap(remapper: Remapper) {
     }
 }
 
-private fun AbstractInsnNode.remap(remapper: Remapper) {
+private fun AbstractInsnNode.remap(remapper: ExtendedRemapper) {
     when (this) {
         is FrameNode -> throw UnsupportedOperationException("SKIP_FRAMES and COMPUTE_FRAMES must be used")
         is FieldInsnNode -> {
             val originalOwner = owner
-            owner = remapper.mapType(originalOwner)
+            owner = remapper.mapFieldOwner(originalOwner, name, desc)
             name = remapper.mapFieldName(originalOwner, name, desc)
             desc = remapper.mapDesc(desc)
         }
         is MethodInsnNode -> {
             val originalOwner = owner
-            owner = remapper.mapType(originalOwner)
+            owner = remapper.mapMethodOwner(originalOwner, name, desc)
             name = remapper.mapMethodName(originalOwner, name, desc)
             desc = remapper.mapDesc(desc)
         }

asm/src/main/java/dev/openrs2/asm/classpath/ClassPath.kt

@@ -6,7 +6,6 @@ import dev.openrs2.asm.toBinaryClassName
 import dev.openrs2.util.collect.DisjointSet
 import dev.openrs2.util.collect.ForestDisjointSet
 import org.objectweb.asm.Opcodes
-import org.objectweb.asm.commons.Remapper
 import org.objectweb.asm.tree.AbstractInsnNode
 import org.objectweb.asm.tree.ClassNode
 
@@ -76,7 +75,7 @@ class ClassPath(
         return null
     }
 
-    fun remap(remapper: Remapper) {
+    fun remap(remapper: ExtendedRemapper) {
         for (library in libraries) {
             library.remap(remapper)
         }

asm/src/main/java/dev/openrs2/asm/classpath/ExtendedRemapper.kt

@@ -0,0 +1,13 @@
+package dev.openrs2.asm.classpath
+
+import org.objectweb.asm.commons.Remapper
+
+abstract class ExtendedRemapper : Remapper() {
+    open fun mapFieldOwner(owner: String, name: String, desc: String): String {
+        return mapType(owner)
+    }
+
+    open fun mapMethodOwner(owner: String, name: String, desc: String): String {
+        return mapType(owner)
+    }
+}

asm/src/main/java/dev/openrs2/asm/classpath/Library.kt

@@ -4,7 +4,6 @@ import com.github.michaelbull.logging.InlineLogger
 import dev.openrs2.asm.io.LibraryReader
 import dev.openrs2.asm.io.LibraryWriter
 import dev.openrs2.asm.remap
-import org.objectweb.asm.commons.Remapper
 import org.objectweb.asm.tree.ClassNode
 import java.nio.file.Files
 import java.nio.file.Path
@@ -41,7 +40,7 @@ class Library() : Iterable<ClassNode> {
         return classes.values.iterator()
     }
 
-    fun remap(remapper: Remapper) {
+    fun remap(remapper: ExtendedRemapper) {
         for (clazz in classes.values) {
             clazz.remap(remapper)
         }

deob/src/main/java/dev/openrs2/deob/remap/PrefixRemapper.kt

@@ -1,22 +1,29 @@
 package dev.openrs2.deob.remap
 
+import dev.openrs2.asm.classpath.ExtendedRemapper
 import dev.openrs2.asm.classpath.Library
 import dev.openrs2.asm.filter.ClassFilter
-import org.objectweb.asm.commons.Remapper
-import org.objectweb.asm.commons.SimpleRemapper
 
-object PrefixRemapper {
-    fun create(library: Library, prefix: String, excluded: ClassFilter): Remapper {
-        val mapping = mutableMapOf<String, String>()
+class PrefixRemapper(private val prefix: String, private val classes: Set<String>) : ExtendedRemapper() {
+    override fun map(internalName: String): String {
+        return if (classes.contains(internalName)) {
+            prefix + internalName
+        } else {
+            internalName
+        }
+    }
+
+    companion object {
+        fun create(library: Library, prefix: String, excluded: ClassFilter): ExtendedRemapper {
+            val classes = mutableSetOf<String>()
 
-        for (clazz in library) {
-            if (excluded.matches(clazz.name)) {
-                mapping[clazz.name] = clazz.name
-            } else {
-                mapping[clazz.name] = prefix + clazz.name
+            for (clazz in library) {
+                if (!excluded.matches(clazz.name)) {
+                    classes += clazz.name
+                }
             }
-        }
 
-        return SimpleRemapper(mapping)
+            return PrefixRemapper(prefix, classes)
+        }
     }
 }

deob/src/main/java/dev/openrs2/deob/remap/TypedRemapper.kt

@@ -5,6 +5,7 @@ import dev.openrs2.asm.MemberDesc
 import dev.openrs2.asm.MemberRef
 import dev.openrs2.asm.classpath.ClassMetadata
 import dev.openrs2.asm.classpath.ClassPath
+import dev.openrs2.asm.classpath.ExtendedRemapper
 import dev.openrs2.asm.filter.ClassFilter
 import dev.openrs2.asm.filter.MemberFilter
 import dev.openrs2.deob.Profile
@@ -12,13 +13,12 @@ import dev.openrs2.util.collect.DisjointSet
 import dev.openrs2.util.indefiniteArticle
 import org.objectweb.asm.Opcodes
 import org.objectweb.asm.Type
-import org.objectweb.asm.commons.Remapper
 
 class TypedRemapper private constructor(
     private val classes: Map<String, String>,
     private val fields: Map<MemberRef, String>,
     private val methods: Map<MemberRef, String>
-) : Remapper() {
+) : ExtendedRemapper() {
     override fun map(internalName: String): String {
         return classes.getOrDefault(internalName, internalName)
     }