maui-linux/System.Maui.Platform.UAP/CollectionView/TemplatedItemSourceFactory.cs

using System.Collections;
using System.Collections.Specialized;

namespace System.Maui.Platform.UWP
{
	internal static class TemplatedItemSourceFactory
	{
		internal static object Create(IEnumerable itemsSource, DataTemplate itemTemplate, BindableObject container, 
			double? itemHeight = null, double? itemWidth = null, Thickness? itemSpacing = null)
		{
			switch (itemsSource)
			{
				case IList observable when itemsSource is INotifyCollectionChanged:
					return new ObservableItemTemplateCollection(observable, itemTemplate, container, itemHeight, itemWidth, itemSpacing);
				case IList list:
					return new ItemTemplateContextList(list, itemTemplate, container, itemHeight, itemWidth, itemSpacing);
			}

			return new ItemTemplateContextEnumerable(itemsSource, itemTemplate, container, itemHeight, itemWidth, itemSpacing);
		}

		internal static object CreateGrouped(IEnumerable itemsSource, DataTemplate itemTemplate, 
			DataTemplate groupHeaderTemplate, DataTemplate groupFooterTemplate, BindableObject container)
		{
			return new GroupedItemTemplateCollection(itemsSource, itemTemplate, groupHeaderTemplate, groupFooterTemplate, container);
		}
	}
}