Close popups on windowWillMiniaturize notification

We do this on windowDidMove/windowWillClose, but we don't on a 'will
miniaturize' notification. This can leave an application with an
orphan popup window, such as context menu which looks really weird.
I err on a safe side though - I don't close all popups - the application's
logic can be such that it has several windows and one of them gets
minimized (we can do this via QWidget's interface, for example) - would
be strange if all popups close. So I only close popups that have
the miniaturized window as a transient parent.

Task-number: QTBUG-77833
Change-Id: Ib655a27c0ce8661f9e7156e6035f7fffaff901b1
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

src/plugins/platforms/cocoa/qcocoaintegration.h

@@ -124,6 +124,8 @@ public:
 
     void beep() const override;
 
+    void closePopups(QWindow *forWindow = nullptr);
+
 private Q_SLOTS:
     void focusWindowChanged(QWindow *);
 

src/plugins/platforms/cocoa/qcocoaintegration.mm

@@ -487,6 +487,19 @@ void QCocoaIntegration::beep() const
     NSBeep();
 }
 
+void QCocoaIntegration::closePopups(QWindow *forWindow)
+{
+    for (auto it = m_popupWindowStack.begin(); it != m_popupWindowStack.end();) {
+        auto *popup = *it;
+        if (!forWindow || popup->window()->transientParent() == forWindow) {
+            it = m_popupWindowStack.erase(it);
+            QWindowSystemInterface::handleCloseEvent<QWindowSystemInterface::SynchronousDelivery>(popup->window());
+        } else {
+            ++it;
+        }
+    }
+}
+
 void QCocoaIntegration::focusWindowChanged(QWindow *focusWindow)
 {
     // Don't revert icon just because we lost focus

src/plugins/platforms/cocoa/qcocoawindow.h

@@ -151,6 +151,7 @@ public:
     Q_NOTIFICATION_HANDLER(NSWindowDidEndLiveResizeNotification) void windowDidEndLiveResize();
     Q_NOTIFICATION_HANDLER(NSWindowDidBecomeKeyNotification) void windowDidBecomeKey();
     Q_NOTIFICATION_HANDLER(NSWindowDidResignKeyNotification) void windowDidResignKey();
+    Q_NOTIFICATION_HANDLER(NSWindowWillMiniaturizeNotification) void windowWillMiniaturize();
     Q_NOTIFICATION_HANDLER(NSWindowDidMiniaturizeNotification) void windowDidMiniaturize();
     Q_NOTIFICATION_HANDLER(NSWindowDidDeminiaturizeNotification) void windowDidDeminiaturize();
     Q_NOTIFICATION_HANDLER(NSWindowWillEnterFullScreenNotification) void windowWillEnterFullScreen();

src/plugins/platforms/cocoa/qcocoawindow.mm

@@ -71,14 +71,6 @@ enum {
     defaultWindowHeight = 160
 };
 
-static void qt_closePopups()
-{
-    while (QCocoaWindow *popup = QCocoaIntegration::instance()->popPopupWindow()) {
-        QWindowSystemInterface::handleCloseEvent(popup->window());
-        QWindowSystemInterface::flushWindowSystemEvents();
-    }
-}
-
 Q_LOGGING_CATEGORY(lcCocoaNotifications, "qt.qpa.cocoa.notifications");
 
 static void qRegisterNotificationCallbacks()
@@ -800,6 +792,11 @@ void QCocoaWindow::windowDidExitFullScreen()
     }
 }
 
+void QCocoaWindow::windowWillMiniaturize()
+{
+    QCocoaIntegration::instance()->closePopups(window());
+}
+
 void QCocoaWindow::windowDidMiniaturize()
 {
     if (!isContentView())
@@ -1138,7 +1135,7 @@ void QCocoaWindow::viewDidChangeGlobalFrame()
 void QCocoaWindow::windowWillMove()
 {
     // Close any open popups on window move
-    qt_closePopups();
+    QCocoaIntegration::instance()->closePopups();
 }
 
 void QCocoaWindow::windowDidMove()
@@ -1267,7 +1264,7 @@ void QCocoaWindow::windowWillClose()
 {
     // Close any open popups on window closing.
     if (window() && !windowIsPopupType(window()->type()))
-        qt_closePopups();
+        QCocoaIntegration::instance()->closePopups();
 }
 
 // ----------------------- NSWindowDelegate callbacks -----------------------