fix: show alt-tab own windows in the thumbnail panel

src/api-wrappers/AXUIElement.swift

@@ -13,13 +13,15 @@ extension AXUIElement {
         return pid
     }
 
-    func isActualWindow(_ isAppHidden: Bool = false) -> Bool {
+    func isActualWindow(_ runningApplication: NSRunningApplication) -> Bool {
         // TODO: TotalFinder and XtraFinder double-window hacks (see #84)
         // Some non-windows have subrole: nil (e.g. some OS elements), "AXUnknown" (e.g. Bartender), "AXSystemDialog" (e.g. Intellij tooltips)
         // Some non-windows have title: nil (e.g. some OS elements)
         // Minimized windows or windows of a hidden app have subrole "AXDialog"
         // Activity Monitor main window subrole is "AXDialog" for a brief moment at launch; it then becomes "AXStandardWindow"
-        return title() != nil && (["AXStandardWindow", "AXDialog"].contains(subrole()) || isMinimized() || isAppHidden) && isOnNormalLevel()
+        return title() != nil &&
+                (["AXStandardWindow", "AXDialog"].contains(subrole()) || isMinimized() || runningApplication.isHidden) &&
+                isOnNormalLevel()
     }
 
     func isOnNormalLevel() -> Bool {

src/logic/Application.swift

@@ -49,8 +49,7 @@ class Application: NSObject {
 
     func observeNewWindows() {
         let newWindows = axUiElement!.windows()?
-                .filter { $0.isActualWindow(runningApplication.isHidden) }
-                .filter { Windows.list.firstIndexThatMatches($0) == nil } ?? []
+                .filter { $0.isActualWindow(runningApplication) && Windows.list.firstIndexThatMatches($0) == nil } ?? []
         addWindows(newWindows)
     }
 
@@ -113,7 +112,7 @@ private func eventApplicationHiddenOrShown(_ app: App, _ element: AXUIElement, _
 }
 
 private func eventWindowCreated(_ app: App, _ element: AXUIElement, _ application: Application) {
-    guard element.isActualWindow() else { return }
+    guard element.isActualWindow(application.runningApplication) else { return }
     // a window being un-minimized can trigger kAXWindowCreatedNotification
     guard Windows.list.firstIndexThatMatches(element) == nil else { return }
     let window = Window(element, application)

src/logic/Applications.swift

@@ -66,7 +66,7 @@ class Applications {
     private static func filterApplications(_ apps: [NSRunningApplication]) -> [NSRunningApplication] {
         // it would be nice to filter with $0.activationPolicy != .prohibited (see https://stackoverflow.com/a/26002033/2249756)
         // however some daemon processes can sometimes create windows, so we can't filter them out (e.g. CopyQ is .prohibited for some reason)
-        return apps.filter { $0.bundleIdentifier != nil && $0.bundleIdentifier != NSRunningApplication.current.bundleIdentifier }
+        return apps.filter { $0.bundleIdentifier != nil }
     }
 }
 

src/ui/main-window/ThumbnailsPanel.swift

@@ -4,8 +4,8 @@ class ThumbnailsPanel: NSPanel, NSCollectionViewDataSource, NSCollectionViewDele
     var backgroundView: NSVisualEffectView!
     var collectionView: NSCollectionView!
     var app: App?
-    let cellId = NSUserInterfaceItemIdentifier("Cell")
     var currentScreen: NSScreen?
+    static let cellId = NSUserInterfaceItemIdentifier("Cell")
 
     convenience init(_ app: App) {
         self.init()
@@ -50,7 +50,7 @@ class ThumbnailsPanel: NSPanel, NSCollectionViewDataSource, NSCollectionViewDele
         collectionView.backgroundColors = [.clear]
         collectionView.isSelectable = true
         collectionView.allowsMultipleSelection = false
-        collectionView.register(CollectionViewItem.self, forItemWithIdentifier: cellId)
+        collectionView.register(CollectionViewItem.self, forItemWithIdentifier: ThumbnailsPanel.cellId)
     }
 
     private func makeLayout() -> CollectionViewFlowLayout {
@@ -65,7 +65,7 @@ class ThumbnailsPanel: NSPanel, NSCollectionViewDataSource, NSCollectionViewDele
     }
 
     func collectionView(_ collectionView: NSCollectionView, itemForRepresentedObjectAt indexPath: IndexPath) -> NSCollectionViewItem {
-        let item = collectionView.makeItem(withIdentifier: cellId, for: indexPath) as! CollectionViewItem
+        let item = collectionView.makeItem(withIdentifier: ThumbnailsPanel.cellId, for: indexPath) as! CollectionViewItem
         item.view_.updateRecycledCellWithNewContent(Windows.list[indexPath.item],
                 { self.app!.focusSelectedWindow(item.view_.window_) },
                 { self.app!.thumbnailsPanel!.highlightCell(item) },