internal static void SetRestoreFocusFields(HwndSource source, object restoreFocus, IntPtr restoreFocusWindow)
{
object fieldValue = FocusHelper.GetFieldValue(FocusHelper.GetFieldValue((object)source, "_keyboard"), "_value");
if (fieldValue == null)
{
return;
}
FocusHelper.SetFieldValue(fieldValue, "_restoreFocusWindow", (object)restoreFocusWindow);
FocusHelper.SetFieldValue(fieldValue, "_restoreFocus", restoreFocus);
}
public static void MoveFocusInto(UIElement element)
{
if (element.IsKeyboardFocusWithin)
{
return;
}
HwndSource source = (HwndSource)PresentationSource.FromVisual((Visual)element);
if (source != null)
{
FocusHelper.SetRestoreFocusFields(source, (object)null, IntPtr.Zero);
}
element.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
}
internal static void ClearRestoreFocusWindowIf(HwndSource source, Predicate <IntPtr> predicate)
{
object fieldValue1 = FocusHelper.GetFieldValue(FocusHelper.GetFieldValue((object)source, "_keyboard"), "_value");
if (fieldValue1 == null)
{
return;
}
object fieldValue2 = FocusHelper.GetFieldValue(fieldValue1, "_restoreFocusWindow");
if (!(fieldValue2 is IntPtr))
{
return;
}
IntPtr num = (IntPtr)fieldValue2;
if (!(num != IntPtr.Zero) || !predicate(num))
{
return;
}
FocusHelper.SetFieldValue(fieldValue1, "_restoreFocusWindow", (object)IntPtr.Zero);
}
