fix: highlight right thumbnail when no window is focused (closes #1044)

src/logic/Application.swift

@@ -14,6 +14,7 @@ class Application: NSObject {
     var dockLabel: String?
     var pid: pid_t { runningApplication.processIdentifier }
     var wasLaunchedBeforeAltTab = false
+    var focusedWindow: Window? = nil
 
     static func notifications(_ app: NSRunningApplication) -> [String] {
         let n = [

src/logic/Windows.swift

@@ -24,6 +24,29 @@ class Windows {
         }
     }
 
+    static func setInitialFocusedWindowIndex() {
+        if let app = Applications.list.first { $0.pid == NSWorkspace.shared.frontmostApplication?.processIdentifier },
+           app.focusedWindow == nil,
+           let lastFocusedWindowIndex = getLastFocusedWindowIndex() {
+            updateFocusedWindowIndex(lastFocusedWindowIndex)
+        } else {
+            updateFocusedWindowIndex(0)
+            cycleFocusedWindowIndex(1)
+        }
+    }
+
+    static func getLastFocusedWindowIndex() -> Int? {
+        var index: Int? = nil
+        var lastFocusOrderMin = Int.max
+        Windows.list.enumerated().forEach {
+            if !$0.element.isWindowlessApp && $0.element.lastFocusOrder < lastFocusOrderMin {
+                lastFocusOrderMin = $0.element.lastFocusOrder
+                index = $0.offset
+            }
+        }
+        return index
+    }
+
     static func appendAndUpdateFocus(_ window: Window) {
         list.forEach {
             $0.lastFocusOrder += 1

src/logic/events/AccessibilityEvents.swift

@@ -44,6 +44,7 @@ fileprivate func applicationActivated(_ element: AXUIElement, _ pid: pid_t) thro
                 app.hasBeenActiveOnce = true
             }
             let window = (appFocusedWindow != nil && wid != nil) ? Windows.updateLastFocus(appFocusedWindow!, wid!)?.first : nil
+            app.focusedWindow = window
             App.app.checkIfShortcutsShouldBeDisabled(window, app.runningApplication)
             App.app.refreshOpenUi(window != nil ? [window!] : nil)
         }
@@ -123,6 +124,13 @@ fileprivate func focusedWindowChanged(_ element: AXUIElement, _ pid: pid_t) thro
                 }
             }
         }
+        DispatchQueue.main.async {
+            Applications.list.first { $0.pid == pid }?.focusedWindow = Windows.list.first { $0.isEqualRobust(element, wid) }
+        }
+    } else {
+        DispatchQueue.main.async {
+            Applications.list.first { $0.pid == pid }?.focusedWindow = nil
+        }
     }
 }
 

src/ui/App.swift

@@ -252,8 +252,7 @@ class App: AppCenterApplication, NSApplicationDelegate {
             Windows.refreshWhichWindowsToShowTheUser(screen)
             Windows.reorderList()
             if (!Windows.list.contains { $0.shouldShowTheUser }) { hideUi(); return }
-            Windows.updateFocusedWindowIndex(0)
-            Windows.cycleFocusedWindowIndex(1)
+            Windows.setInitialFocusedWindowIndex()
             delayedDisplayScheduled += 1
             DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Preferences.windowDisplayDelay) { () -> () in
                 if self.delayedDisplayScheduled == 1 {