Cocoa: Handle Qt::WindowDoesNotAcceptFocus

Make windows with the Qt::WindowDoesNotAcceptFocus
flag refuse to become the key window.

This is in addition to the existing refusal to become
the first responder in QNSView. Refactor the common
test into a new function:
bool shouldRefuseKeyWindowAndFirstResponder()

Task-number: QTBUG-32385
Change-Id: I31021b5d8895a17c48f94f3691e6590c90b68627
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>

src/plugins/platforms/cocoa/qcocoawindow.h

@@ -230,6 +230,7 @@ public:
     void obscureWindow();
     void updateExposedGeometry();
     QWindow *childWindowAt(QPoint windowPoint);
+    bool shouldRefuseKeyWindowAndFirstResponder();
 protected:
     void recreateWindow(const QPlatformWindow *parentWindow);
     QCocoaNSWindow *createNSWindow();

src/plugins/platforms/cocoa/qcocoawindow.mm

@@ -237,6 +237,9 @@ static bool isMouseEvent(NSEvent *ev)
     if (!pw || pw->m_isNSWindowChild)
         return NO;
 
+    if (pw->shouldRefuseKeyWindowAndFirstResponder())
+        return NO;
+
     // The default implementation returns NO for title-bar less windows,
     // override and return yes here to make sure popup windows such as
     // the combobox popup can become the key window.
@@ -314,6 +317,9 @@ static bool isMouseEvent(NSEvent *ev)
     if (!pw)
         return NO;
 
+    if (pw->shouldRefuseKeyWindowAndFirstResponder())
+        return NO;
+
     // Only tool or dialog windows should become key:
     Qt::WindowType type = pw->window()->type();
     if (type == Qt::Tool || type == Qt::Dialog)
@@ -1776,6 +1782,17 @@ QWindow *QCocoaWindow::childWindowAt(QPoint windowPoint)
     return targetWindow;
 }
 
+bool QCocoaWindow::shouldRefuseKeyWindowAndFirstResponder()
+{
+    // This function speaks up if there's any reason
+    // to refuse key window or first responder state.
+
+    if (window()->flags() & Qt::WindowDoesNotAcceptFocus)
+        return true;
+
+    return false;
+}
+
 QMargins QCocoaWindow::frameMargins() const
 {
     NSRect frameW = [m_nsWindow frame];

src/plugins/platforms/cocoa/qnsview.mm

@@ -596,7 +596,7 @@ static NSString *_q_NSWindowDidChangeOcclusionStateNotification = nil;
 
 - (BOOL)acceptsFirstResponder
 {
-    if (m_window->flags() & Qt::WindowDoesNotAcceptFocus)
+    if (m_platformWindow->shouldRefuseKeyWindowAndFirstResponder())
         return NO;
     if (m_window->flags() & Qt::WindowTransparentForInput)
         return NO;