private PropertyGroup AddAndReturnPropertyGroup(string name)
{
// ensure we don't have it already
if (PropertyGroups.Any(x => x.Name == name))
{
return(null);
}
// create the new group
var group = new PropertyGroup {
Name = name, SortOrder = 0
};
// check if it is inherited - there might be more than 1 but we want the 1st, to
// reuse its sort order - if there are more than 1 and they have different sort
// orders... there isn't much we can do anyways
var inheritGroup = CompositionPropertyGroups.FirstOrDefault(x => x.Name == name);
if (inheritGroup == null)
{
// no, just local, set sort order
var lastGroup = PropertyGroups.LastOrDefault();
if (lastGroup != null)
{
group.SortOrder = lastGroup.SortOrder + 1;
}
}
else
{
// yes, inherited, re-use sort order
group.SortOrder = inheritGroup.SortOrder;
}
// add
PropertyGroups.Add(group);
return(group);
}
