Don't run transformers on classes with @Mixin annotation

src/main/java/com/github/terminatornl/tickcentral/api/ClassSniffer.java

@@ -105,14 +105,8 @@ public static boolean isInstanceOf(ClassReader reader, String obfuscated, boolea
 			} else {
 				ClassReader superReader = new ClassReader(superClass);
 				if (disallowMixinSupers) {
-					ClassNode superClassNode = new ClassNode();
-					superReader.accept(superClassNode, 0);
-					if (superClassNode.invisibleAnnotations != null) {
-						for (AnnotationNode annotation : superClassNode.invisibleAnnotations) {
-							if (annotation.desc.equals("Lorg/spongepowered/asm/mixin/Mixin;")) {
-								return false;
-							}
-						}
+					if (hasMixinAnnotation(superReader)) {
+						return false;
 					}
 				}
 				if (isInstanceOf(superReader, obfuscated, disallowMixinSupers)) {
@@ -164,10 +158,22 @@ public static <R> R performOnMappedSource(String source, Function<ClassReader, R
 		return callable.apply(new ClassReader(Compatibility.OrderedArrayList.INSTANCE.transformAsPureFML(obfName, transformedName, data)));
 	}
 
+	public static boolean hasMixinAnnotation(ClassReader classReader) {
+		ClassNode classNode = new ClassNode();
+		classReader.accept(classNode, 0);
+		return hasMixinAnnotation(classNode);
+	}
 
-
-
-
-
+	private static boolean hasMixinAnnotation(ClassNode classNode) {
+		if (classNode.invisibleAnnotations == null) {
+			return false;
+		}
+		for (AnnotationNode annotation : classNode.invisibleAnnotations) {
+			if (annotation.desc.equals("Lorg/spongepowered/asm/mixin/Mixin;")) {
+				return true;
+			}
+		}
+		return false;
+	}
 
 }

src/main/java/com/github/terminatornl/tickcentral/asm/BlockTransformer.java

@@ -92,7 +92,7 @@ public byte[] transform(String name, String transformedName, byte[] basicClass)
 				return null;
 			}
 			ClassReader reader = new ClassReader(basicClass);
-			if (ClassSniffer.isInstanceOf(reader, BLOCK_CLASS_OBF) == false) {
+			if (ClassSniffer.hasMixinAnnotation(reader) || !ClassSniffer.isInstanceOf(reader, BLOCK_CLASS_OBF)) {
 				return basicClass;
 			}
 			String className = reader.getClassName();

src/main/java/com/github/terminatornl/tickcentral/asm/EntityTransformer.java

@@ -61,7 +61,7 @@ public byte[] transform(String name, String transformedName, byte[] basicClass)
 				return null;
 			}
 			ClassReader reader = new ClassReader(basicClass);
-			if (ClassSniffer.isInstanceOf(reader, ENTITY_CLASS_OBF) == false) {
+			if (ClassSniffer.hasMixinAnnotation(reader) || !ClassSniffer.isInstanceOf(reader, ENTITY_CLASS_OBF)) {
 				return basicClass;
 			}
 			boolean dirty = false;

src/main/java/com/github/terminatornl/tickcentral/asm/ITickableTransformer.java

@@ -45,7 +45,7 @@ public byte[] transform(String name, String transformedName, byte[] basicClass)
 			}
 			ClassReader reader = new ClassReader(basicClass);
 
-			if (ClassSniffer.isInstanceOf(reader, INTERFACE_CLASS_OBF) == false) {
+			if (ClassSniffer.hasMixinAnnotation(reader) || !ClassSniffer.isInstanceOf(reader, INTERFACE_CLASS_OBF)) {
 				return basicClass;
 			}