public override BaseRef Unwrap()
{
if (_cached == null)
{
_cached = new NumRef(N, Filter ?? RefFilter.All, NonOverlapping, Inclusive);
}
return(_cached);
}
public IEnumerable <KeyValuePair <FloorSelection, FloorSelection> > MatchFrom(IReadOnlyList <FloorSelection> floors, BaseRef start, IEnumerable <FloorSelection> selectedByStart)
{
Contract.Requires(floors != null);
Contract.Requires(start != null);
Contract.Requires(selectedByStart != null);
Contract.Ensures(Contract.Result <IEnumerable <KeyValuePair <FloorSelection, FloorSelection> > >() != null);
//Select all matching pairs
var selected = start.FilterByMode(selectedByStart.SelectMany(a => {
var matches = MatchImpl(floors, a.Index)
.Select(b => new KeyValuePair <FloorSelection, FloorSelection>(a, b))
.Where(p => Inclusive || p.Key.Index != p.Value.Index);
return(FilterByMode(matches));
}));
//If we don't care about overlaps we're done, good to go
if (!NonOverlapping)
{
return(selected);
}
//We need to reject overlaps
//First group into overlapping sets
var sets = new List <List <KeyValuePair <FloorSelection, FloorSelection> > >();
foreach (var kvp in selected)
{
var set = sets.FirstOrDefault(s => s.Any(a => a.Key.Index <= kvp.Value.Index && a.Value.Index >= kvp.Key.Index));
if (set != null)
{
set.Add(kvp);
}
else
{
sets.Add(new List <KeyValuePair <FloorSelection, FloorSelection> > {
kvp
});
}
}
//Now filter *each set* by the filter mode
return(sets.SelectMany(FilterByMode));
}