icsharpcode-ILSpy/ILSpy/BaseTypesTreeNode.cs

// Copyright (c) 2011 AlphaSierraPapa for the SharpDevelop Team
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;
using System.Linq;
using ICSharpCode.TreeView;
using Mono.Cecil;

namespace ICSharpCode.ILSpy
{
	/// <summary>
	/// Lists the base types of a class.
	/// </summary>
	sealed class BaseTypesTreeNode : SharpTreeNode
	{
		readonly TypeDefinition type;
		
		public BaseTypesTreeNode(TypeDefinition type)
		{
			this.type = type;
			this.LazyLoading = true;
		}
		
		public override object Text {
			get { return "Base Types"; }
		}
		
		public override object Icon {
			get { return Images.Undo; }
		}
		
		protected override void LoadChildren()
		{
			AddBaseTypes(this.Children, type);
		}
		
		static void AddBaseTypes(SharpTreeNodeCollection children, TypeDefinition type)
		{
			if (type.BaseType != null)
				children.Add(new EntryNode(type.BaseType, false));
			foreach (TypeReference i in type.Interfaces) {
				children.Add(new EntryNode(i, true));
			}
		}
		
		sealed class EntryNode : SharpTreeNode
		{
			TypeReference tr;
			TypeDefinition def;
			bool isInterface;
			
			public EntryNode(TypeReference tr, bool isInterface)
			{
				if (tr == null)
					throw new ArgumentNullException("tr");
				this.tr = tr;
				this.def = tr.Resolve();
				this.isInterface = isInterface;
				this.LazyLoading = true;
			}
			
			public override bool ShowExpander {
				get {
					return def != null && (def.BaseType != null || def.HasInterfaces);
				}
			}
			
			public override object Text {
				get { return tr.FullName; }
			}
			
			public override object Icon {
				get {
					if (def != null)
						return TypeTreeNode.GetIcon(def);
					else
						return isInterface ? Images.Interface : Images.Class;
				}
			}
			
			protected override void LoadChildren()
			{
				if (def != null)
					AddBaseTypes(this.Children, def);
			}
			
			public override void ActivateItem(System.Windows.RoutedEventArgs e)
			{
				// on item activation, try to resolve once again (maybe the user loaded the assembly in the meantime)
				if (def == null) {
					def = tr.Resolve();
					if (def != null)
						this.LazyLoading = true; // re-load children
				}
				if (def != null) {
					var assemblyListNode = this.Ancestors().OfType<AssemblyListTreeNode>().FirstOrDefault();
					if (assemblyListNode != null) {
						assemblyListNode.Select(assemblyListNode.FindTypeNode(def));
						e.Handled = true;
					}
				}
			}
		}
	}
}