static BuildSettingsSearcherDatabase Populate <T>(HashSet <Type> types, Func <Type, string> displayNameResolver)
{
var list = new List <SearcherItem>();
var dict = new Dictionary <string, SearcherItem>();
var collection = TypeCache.GetTypesDerivedFrom <T>();
foreach (var type in collection)
{
if (type.IsGenericType || type.IsAbstract || type.ContainsGenericParameters || type.IsInterface)
{
continue;
}
if (!TypeConstruction.HasParameterLessConstructor(type))
{
continue;
}
try
{
if (types.Contains(type))
{
continue;
}
var category = string.Empty;
TypeSearcherItem typeItem = null;
// Fully type-based
if (null == displayNameResolver)
{
typeItem = new TypeSearcherItem(type);
category = type.Namespace ?? "Global";
}
// We control the naming
else
{
var displayName = displayNameResolver.Invoke(type);
var prefixIndex = displayName.IndexOf("/", StringComparison.InvariantCultureIgnoreCase);
category = prefixIndex >= 0 ? displayName.Substring(0, prefixIndex) : "Other";
var name = displayName.Substring(prefixIndex >= 0 ? prefixIndex + 1 : 0);
typeItem = new TypeSearcherItem(type, name);
}
if (!dict.TryGetValue(category, out var item))
{
dict[category] = item = new SearcherItem(category);
list.Add(item);
}
item.AddChild(typeItem);
}
catch (Exception)
{
// ignored
}
}
foreach (var kvp in dict)
{
kvp.Value.Children.Sort(CompareByName);
}
list.Sort(CompareByName);
return(new BuildSettingsSearcherDatabase(list));
}