Fix title bar element detection

Rectangle/AccessibilityElement.swift

@@ -172,6 +172,22 @@ class AccessibilityElement {
         return elements
     }
 
+    func getSelfOrChildElementRecursively(_ position: CGPoint) -> AccessibilityElement? {
+        func getChildElement() -> AccessibilityElement? {
+            return element.childElements?
+                .map {(element: $0, frame: $0.frame)}
+                .filter { $0.frame.contains(position) }
+                .min { $0.frame.width * $0.frame.height < $1.frame.width * $1.frame.height }?
+                .element
+        }
+        var element = self
+        var elements = Set<AccessibilityElement>()
+        while let childElement = getChildElement(), elements.insert(childElement).inserted {
+            element = childElement
+        }
+        return element
+    }
+
     var windowId: CGWindowID? {
         wrappedElement.getWindowId()
     }
@@ -359,6 +375,18 @@ extension AccessibilityElement {
     }
 }
 
+extension AccessibilityElement: Equatable {
+    static func == (lhs: AccessibilityElement, rhs: AccessibilityElement) -> Bool {
+        return lhs.wrappedElement == rhs.wrappedElement
+    }
+}
+
+extension AccessibilityElement: Hashable {
+    func hash(into hasher: inout Hasher) {
+        hasher.combine(wrappedElement)
+    }
+}
+
 class StageWindowAccessibilityElement: AccessibilityElement {
     private let _windowId: CGWindowID
 

Rectangle/TitleBarManager.swift

@@ -36,7 +36,7 @@ class TitleBarManager {
             TitleBarManager.systemSettingDisabled,
             let action = WindowAction(rawValue: Defaults.doubleClickTitleBar.value - 1),
             case let location = NSEvent.mouseLocation.screenFlipped,
-            let element = AccessibilityElement(location),
+            let element = AccessibilityElement(location)?.getSelfOrChildElementRecursively(location),
             let windowElement = element.windowElement,
             var titleBarFrame = windowElement.titleBarFrame
         else {