/// <returns>
/// Returns whether this collection has a non-empty intersection with the inverse of the other collection
/// </returns>
internal bool IntersectsInverseOf(TimeIntervalCollection other)
{
Debug.Assert(!_invertCollection); // Make sure we never leave inverted mode enabled
if (this.ContainsNullPoint && !other.ContainsNullPoint) // Intersection at null points
{
return true;
}
if (this.IsEmptyOfRealPoints) // We are empty, and have no null point; we have nothing to intersect
{
return false;
}
else if (other.IsEmptyOfRealPoints || // We are non-empty, and other is the inverse of empty (e.g. covers all real numbers, so we must intersect), OR...
this._nodeTime[0] < other._nodeTime[0]) // Neither TIC is empty, and we start first; this means the inverted "other" by necessity
// overlaps our first node, so it must intersect either our node or subsequent interval.
{
return true;
}
else // Neither TIC is empty, and other starts no later than we do; then use regular intersection logic with inverted boolean flags
{
other.SetInvertedMode(true);
bool returnValue = IntersectsHelper(other);
other.SetInvertedMode(false); // Make sure we don't leave other TIC in an inverted state!
return returnValue;
}
}
