1 files changed, 139 insertions, 0 deletions
diff --git a/Xamarin.PropertyEditing.Mac/Controls/BindingEditor/BindingResourceOutlineView.cs b/Xamarin.PropertyEditing.Mac/Controls/BindingEditor/BindingResourceOutlineView.cs
new file mode 100644
index 0000000..025fcba
--- /dev/null
+++ b/Xamarin.PropertyEditing.Mac/Controls/BindingEditor/BindingResourceOutlineView.cs
@@ -0,0 +1,139 @@
+using System;
+using System.Linq;
+using AppKit;
+using Foundation;
+
+namespace Xamarin.PropertyEditing.Mac
+{
+	internal class BindingResourceOutlineView : BaseSelectorOutlineView
+	{
+		private ILookup<ResourceSource, Resource> itemsSource;
+		public ILookup<ResourceSource, Resource> ItemsSource
+		{
+			get => this.itemsSource;
+			set
+			{
+				if (this.itemsSource != value) {
+					this.itemsSource = value;
+
+					DataSource = new BindingResourceOutlineViewDataSource (this.itemsSource);
+					Delegate = new BindingResourceOutlineViewDelegate ();
+				}
+
+				ReloadData ();
+
+				ExpandItem (null, true);
+			}
+		}
+	}
+
+	internal class BindingResourceOutlineViewDelegate : NSOutlineViewDelegate
+	{
+		private const string ResourceIdentifier = "resource";
+
+		public override NSView GetView (NSOutlineView outlineView, NSTableColumn tableColumn, NSObject item)
+		{
+			var labelContainer = (UnfocusableTextField)outlineView.MakeView (ResourceIdentifier, this);
+			if (labelContainer == null) {
+				labelContainer = new UnfocusableTextField {
+					Identifier = ResourceIdentifier,
+				};
+			}
+			var target = (item as NSObjectFacade).Target;
+
+			switch (target) {
+			case IGrouping<ResourceSource, Resource> kvp:
+				labelContainer.StringValue = kvp.Key.Name;
+				break;
+			case Resource resource:
+				labelContainer.StringValue = resource.Name;
+				break;
+			default:
+				labelContainer.StringValue = Properties.Resources.ResourceNotSupported;
+				break;
+			}
+
+			return labelContainer;
+		}
+
+		public override bool ShouldSelectItem (NSOutlineView outlineView, NSObject item)
+		{
+			var target = (item as NSObjectFacade).Target;
+			switch (target) {
+			case IGrouping<ResourceSource, Resource> kvp:
+				return false;
+			case Resource resource:
+				return true;
+
+			default:
+				return false;
+			}
+		}
+	}
+
+	internal class BindingResourceOutlineViewDataSource : NSOutlineViewDataSource
+	{
+		public ILookup<ResourceSource, Resource> ItemsSource { get; }
+
+		internal BindingResourceOutlineViewDataSource (ILookup<ResourceSource, Resource> itemsSource)
+		{
+			if (itemsSource == null)
+				throw new ArgumentNullException (nameof (itemsSource));
+
+			ItemsSource = itemsSource;
+		}
+
+		public override nint GetChildrenCount (NSOutlineView outlineView, NSObject item)
+		{
+			if (item == null) {
+				return ItemsSource != null ? ItemsSource.Count : 0;
+			} else {
+				var target = (item as NSObjectFacade).Target;
+				switch (target) {
+				case IGrouping<ResourceSource, Resource> kvp:
+					return kvp.Count ();
+				case Resource resource:
+					return 0;
+				default:
+					return 0;
+				}
+			}
+		}
+
+		public override NSObject GetChild (NSOutlineView outlineView, nint childIndex, NSObject item)
+		{
+			object element;
+
+			if (item == null) {
+				element = ItemsSource.ElementAt ((int)childIndex);
+			} else {
+				var target = (item as NSObjectFacade).Target;
+				switch (target) {
+				case IGrouping<ResourceSource, Resource> kvp:
+					element = kvp.ElementAt ((int)childIndex);
+					break;
+				case Resource resource:
+					element = resource;
+					break;
+				default:
+					return null;
+				}
+			}
+
+			return new NSObjectFacade (element);
+		}
+
+		public override bool ItemExpandable (NSOutlineView outlineView, NSObject item)
+		{
+			var target = (item as NSObjectFacade).Target;
+			switch (target) {
+			case IGrouping<ResourceSource, Resource> kvp:
+				return kvp.Any ();
+			case Resource resource:
+				return false;
+			default:
+				return false;
+			}
+		}
+	}
+}