fix anonymous classes not being resolved

src/main/kotlin/com/replaymod/gradle/remap/PsiMapper.kt

@@ -12,6 +12,8 @@ import org.jetbrains.kotlin.com.intellij.openapi.project.Project
 import org.jetbrains.kotlin.com.intellij.openapi.util.TextRange
 import org.jetbrains.kotlin.com.intellij.openapi.util.text.StringUtil
 import org.jetbrains.kotlin.com.intellij.psi.*
+import org.jetbrains.kotlin.com.intellij.psi.impl.compiled.ClsClassImpl
+import org.jetbrains.kotlin.com.intellij.psi.impl.java.stubs.JavaStubElementTypes
 import org.jetbrains.kotlin.com.intellij.psi.search.GlobalSearchScope
 import org.jetbrains.kotlin.com.intellij.psi.util.ClassUtil
 import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
@@ -88,11 +90,46 @@ internal class PsiMapper(
         return Pair(result, errors)
     }
 
-    private fun findPsiClass(name: String, project: Project = file.project) =
-        JavaPsiFacade.getInstance(project).findClass(
+    private fun findPsiClass(name: String, project: Project = file.project): PsiClass? {
+        val value = JavaPsiFacade.getInstance(project).findClass(
             name.replace('/', '.').replace('$', '.'),
             GlobalSearchScope.allScope(project),
         )
+        if (value == null) {
+            // failed to find? is anonymous class?
+            val dollarIndex = name.lastIndexOf('$')
+            if (dollarIndex != -1) {
+                val afterDollar = name.substring(dollarIndex + 1)
+                if (afterDollar.toIntOrNull() != null) {
+                    val outerName = name.substring(0, dollarIndex)
+                    val outer = findPsiClass(outerName, project) ?: return null
+                    if (outer is ClsClassImpl) {
+                        // for some reason anonymous are excluded -_-
+                        return outer.stub.getChildrenByType(JavaStubElementTypes.CLASS, PsiClass.ARRAY_FACTORY).firstOrNull {
+                            it.name == afterDollar
+                        }
+                    } else {
+                        // visit outer class with a visitor and return on anonymous class that matches
+                        var result: PsiClass? = null
+                        outer.acceptChildren(object : JavaRecursiveElementVisitor() {
+                            override fun visitAnonymousClass(aClass: PsiAnonymousClass) {
+                                if (aClass.dollarQualifiedName.equals(name.replace('/', '.'))) {
+                                    result = aClass
+                                }
+                                super.visitClass(aClass)
+                            }
+
+                            override fun visitElement(element: PsiElement) {
+                                System.err.println("Visiting ${element.javaClass.simpleName} in ${outer.name}")
+                            }
+                        })
+                        return result
+                    }
+                }
+            }
+        }
+        return value
+    }
 
     private fun map(expr: PsiElement, field: PsiField) {
         val fieldName = field.name ?: return

src/test/kotlin/com/replaymod/gradle/remap/mapper/mixin/TestMixinShadow.kt

@@ -23,4 +23,24 @@ class TestMixinShadow {
             }
         """.trimIndent()
     }
+
+
+    @Test
+    fun `resolve shadow names in anonymous classes`() {
+        TestData.remap("""
+            @org.spongepowered.asm.mixin.Mixin(targets = "a.pkg.A$2")
+            abstract class MixinA {
+                @org.spongepowered.asm.mixin.Shadow
+                protected abstract void aMethodAnon();
+                private void test() { this.aMethodAnon(); }
+            }
+        """.trimIndent()) shouldBe """
+            @org.spongepowered.asm.mixin.Mixin(targets = "b.pkg.B$2")
+            abstract class MixinA {
+                @org.spongepowered.asm.mixin.Shadow
+                protected abstract void bMethodAnon();
+                private void test() { this.bMethodAnon(); }
+            }
+        """.trimIndent()
+    }
 }

src/test/resources/mappings.srg

@@ -24,6 +24,8 @@ MD: a/pkg/A/aOverloaded (Z)V b/pkg/B/bOverloaded (Z)V
 MD: a/pkg/A/commonOverloaded (Ljava/lang/Object;)V b/pkg/B/commonOverloaded (Ljava/lang/Object;)V
 MD: a/pkg/A/commonOverloaded (La/pkg/A;)V b/pkg/B/commonOverloaded (La/pkg/B;)V
 CL: a/pkg/A$1 b/pkg/B$1
+CL: a/pkg/A$2 b/pkg/B$2
+MD: a/pkg/A$2/aMethodAnon ()V b/pkg/B$2/bMethodAnon ()V
 CL: a/pkg/A$Inner b/pkg/B$Inner
 FD: a/pkg/A$Inner/aField b/pkg/B$Inner/bField
 CL: a/pkg/A$InnerA b/pkg/B$InnerB

src/testA/java/a/pkg/A.java

@@ -101,6 +101,13 @@ public void aInterfaceMethod() {
         new A() {};
     }
 
+    public void aAnon() {
+        new A() {
+            public void aMethodAnon() {
+            }
+        };
+    }
+
     public static void supplier(Supplier<String> supplier) {
     }
 

src/testB/java/b/pkg/B.java

@@ -98,6 +98,13 @@ public void bInterfaceMethod() {
         new B() {};
     }
 
+    public void bAnon() {
+        new B() {
+            public void bMethodAnon() {
+            }
+        };
+    }
+
     public class Inner {
         private int bField;
     }