Handle the case where persistent indexes have gone invalid.

Don't add invalid ranges to the result. They will be removed
whenever d->ranges is processed for public consumption
anyway. For example, QItemSelectionModel::selection() calls
merge() with another selection. The merge() method removes
invalid ranges already. But the invalid ranges don't need
to be there in the first place, so this patch removes them.

A longer-term goal is to maintain d->ranges as an always-sorted list.

This method can be called with a vector containing invalid
QPersistentModelIndexes when those persistent indexes are made invalid
in between layoutAboutToBeChanged and layoutChanged. It's a normal
thing to happen and a case that should be handled deliberately.

Change-Id: I741ed9208d8a75644975c9e8d61f0d6d78e20576
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

0 files changed, 0 insertions, 0 deletions