feat: swipe-controls override volume button behaviour (#285)

src/main/kotlin/app/revanced/extensions/Extensions.kt

@@ -1,8 +1,10 @@
 package app.revanced.extensions
 
+import app.revanced.patcher.data.impl.BytecodeData
 import app.revanced.patcher.data.impl.ResourceData
 import app.revanced.patcher.extensions.addInstructions
 import app.revanced.patcher.patch.PatchResultError
+import app.revanced.patcher.util.proxy.mutableTypes.MutableClass
 import app.revanced.patcher.util.proxy.mutableTypes.MutableMethod
 import app.revanced.patcher.util.smali.toInstruction
 import org.jf.dexlib2.AccessFlags
@@ -27,6 +29,30 @@ internal fun MutableMethodImplementation.injectHideCall(
     )
 }
 
+/**
+ * traverse the class hierarchy starting from the given root class
+ *
+ * @param targetClass the class to start traversing the class hierarchy from
+ * @param callback function that is called for every class in the hierarchy
+ */
+fun BytecodeData.traverseClassHierarchy(targetClass: MutableClass, callback: MutableClass.() -> Unit) {
+    callback(targetClass)
+    this.findClass(targetClass.superclass ?: return)?.resolve()?.let {
+        traverseClassHierarchy(it, callback)
+    }
+}
+
+/**
+ * apply a transform to all methods of the class
+ *
+ * @param transform the transformation function. original method goes in, transformed method goes out
+ */
+fun MutableClass.transformMethods(transform: MutableMethod.() -> MutableMethod) {
+    val transformedMethods = methods.map { it.transform() }
+    methods.clear()
+    methods.addAll(transformedMethods)
+}
+
 /**
  * Insert an event hook at the top of the method. If the hook returns true, the event is consumed and the method will return with true
  *