private int[] move(MoveRowWithinExistingSectionsCollectionChange <TModel> change)
{
var oldSectionWasRemoved = remove(change.OldIndex);
tableView.InsertRows(change.Index.ToIndexPaths(), UITableViewRowAnimation.Automatic);
return(oldSectionWasRemoved
? new[] { change.Index.Section }
: new[] { change.OldIndex.Section, change.Index.Section });
}
private int[] move(MoveRowWithinExistingSectionsCollectionChange <TModel> change)
{
var oldSectionWasRemoved = remove(change.OldIndex);
tableView.InsertRows(change.Index.ToIndexPaths(), UITableViewRowAnimation.Automatic);
if (oldSectionWasRemoved)
{
// The index of the section which needs refreshing must be the index before the changes happen.
// The index of the target section might change if the old section was in front of the target one
// and the old one was removed. The original index of the target section would then be a one more
// than the index after hte operation (which is the value of `change.Index.Section`).
return(new[] { change.Index.Section + change.OldIndex.Section <= change.Index.Section ? 1 : 0 });
}
return(new[] { change.OldIndex.Section, change.Index.Section });
}
private void moveRowWithinExistingSections(MoveRowWithinExistingSectionsCollectionChange <TModel> moveRowWithinExistingSections)
{
var sectionsCountBeforeUpdate = sectionsIndexes.Count;
var oldIndex = mapSectionIndexToAdapterIndex(moveRowWithinExistingSections.OldIndex);
var oldSectionIndex = sectionsIndexes[moveRowWithinExistingSections.OldIndex.Section] + HeaderOffset;
updateSectionIndexes();
var oldSectionWasDeleted = sectionsCountBeforeUpdate != sectionsIndexes.Count;
if (oldSectionWasDeleted)
{
NotifyItemRemoved(oldSectionIndex);
}
var newIndex = mapSectionIndexToAdapterIndex(moveRowWithinExistingSections.Index);
NotifyItemMoved(oldIndex, newIndex);
}