private static IReadOnlyList <T> Sort <T>(
IEnumerable <T> list, StorageItemSortPreference sortPreference,
Func <T, string> getName, Func <T, bool> isDirectory
)
{
var items = list.ToList();
items.Sort((left, right) => {
if (sortPreference == StorageItemSortPreference.None || isDirectory(left) == isDirectory(right))
{
return(NaturalOrder.Comparer.Compare(getName(left), getName(right)));
}
if (isDirectory(left))
{
return(sortPreference == StorageItemSortPreference.DirectoriesFirst ? LeftFirst : RightFirst);
}
else
{
return(sortPreference == StorageItemSortPreference.DirectoriesFirst ? RightFirst : LeftFirst);
}
});
return(items);
}
public static IReadOnlyList <Win32Interop.IO.FileOrDirectoryInfo> InNaturalOrder(
this IEnumerable <Win32Interop.IO.FileOrDirectoryInfo> list,
StorageItemSortPreference sortPreference = StorageItemSortPreference.None
)
{
return(Sort(list, sortPreference, info => info.Name,
info => info.ItemType == Win32Interop.IO.FileOrDirectoryType.Directory));
}
public static IReadOnlyList <T> InNaturalOrder <T>(
this IEnumerable <T> list, StorageItemSortPreference sortPreference = StorageItemSortPreference.None
) where T : IStorageItem
{
return(Sort(list, sortPreference, info => info.Name, info => info.IsOfType(StorageItemTypes.Folder)));
}
public static async Task <IReadOnlyList <IStorageItem> > GetItemsInNaturalOrderAsync(
this StorageFolder item, StorageItemSortPreference sortPreference = StorageItemSortPreference.None
)
{
return(InNaturalOrder(await item.GetItemsAsync(), sortPreference));
}
