Add QCocoaWindowFunctions and add a function to find the clip offset

Change-Id: I0f9cd1f923867f6f24b3bc54e442a16b5d2a11e4
Reviewed-by: Tim Blechmann <tim@klingt.org>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
index e5fedcd051..37d9ada44c 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.mm
+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
@@ -1839,6 +1839,25 @@ bool QCocoaWindow::shouldRefuseKeyWindowAndFirstResponder()
     return false;
 }
 
+QPoint QCocoaWindow::bottomLeftClippedByNSWindowOffsetStatic(QWindow *window)
+{
+    if (window->handle())
+        return static_cast<QCocoaWindow *>(window->handle())->bottomLeftClippedByNSWindowOffset();
+    return QPoint();
+}
+
+QPoint QCocoaWindow::bottomLeftClippedByNSWindowOffset() const
+{
+    if (!m_contentView)
+        return QPoint();
+    NSPoint origin = [m_contentView isFlipped] ?
+                        NSMakePoint(0, [m_contentView frame].size.height) :
+                        NSMakePoint(0, 0);
+    NSPoint windowPoint = [m_contentView convertPoint:origin toView:nil];
+
+    return QPoint(-std::min((int)windowPoint.x, 0), -std::min((int)windowPoint.y,0));
+}
+
 QMargins QCocoaWindow::frameMargins() const
 {
     NSRect frameW = [m_nsWindow frame];