When programatically setting a text selection on iOS, we
call [UITextInputDelegate selectionWillChange] to report
the change. If auto correction is enabled, UIKit will then
reset the current tracking, and for some reason tell us to
clear the selection. This is contradictory to us
saying the the selection is about to change, and will
cause an unwanted recursion back to Qt.
Since there seems to be no way to stop UIKit from doing
this, this patch will instead add a guard that refuses
to change the selection recursively while processing
a selection change from Qt.
Task-number: QTBUG-43716
Change-Id: Id487a57cdda55d7e2d09c3efc14c7f03f566f15a
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>
13ecde3b7a