ILSpy/ILSpy/TreeNodes/EventTreeNode.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.Windows.Media;
using ICSharpCode.Decompiler;
using Mono.Cecil;

namespace ICSharpCode.ILSpy.TreeNodes
{
	/// <summary>
	/// Represents an event in the TreeView.
	/// </summary>
	public sealed class EventTreeNode : ILSpyTreeNode, IMemberTreeNode
	{
		
		public EventTreeNode(EventDefinition ev)
		{
			if (ev == null)
				throw new ArgumentNullException(nameof(ev));
			this.EventDefinition = ev;
			
			if (ev.AddMethod != null)
				this.Children.Add(new MethodTreeNode(ev.AddMethod));
			if (ev.RemoveMethod != null)
				this.Children.Add(new MethodTreeNode(ev.RemoveMethod));
			if (ev.InvokeMethod != null)
				this.Children.Add(new MethodTreeNode(ev.InvokeMethod));
			if (ev.HasOtherMethods) {
				foreach (var m in ev.OtherMethods)
					this.Children.Add(new MethodTreeNode(m));
			}
		}

		public EventDefinition EventDefinition { get; }

		public override object Text => GetText(EventDefinition, this.Language) + EventDefinition.MetadataToken.ToSuffixString();

		public static object GetText(EventDefinition eventDef, Language language)
		{
			return HighlightSearchMatch(eventDef.Name, " : " + language.TypeToString(eventDef.EventType, false, eventDef));
		}

		public override object Icon => GetIcon(EventDefinition);

		public static ImageSource GetIcon(EventDefinition eventDef)
		{
			MethodDefinition accessor = eventDef.AddMethod ?? eventDef.RemoveMethod;
			if (accessor != null)
				return Images.GetIcon(MemberIcon.Event, GetOverlayIcon(eventDef.AddMethod.Attributes), eventDef.AddMethod.IsStatic);
			else
				return Images.GetIcon(MemberIcon.Event, AccessOverlayIcon.Public, false);
		}

		private static AccessOverlayIcon GetOverlayIcon(MethodAttributes methodAttributes)
		{
			switch (methodAttributes & MethodAttributes.MemberAccessMask) {
				case MethodAttributes.Public:
					return AccessOverlayIcon.Public;
				case MethodAttributes.Assembly:
				case MethodAttributes.FamANDAssem:
					return AccessOverlayIcon.Internal;
				case MethodAttributes.Family:
					return AccessOverlayIcon.Protected;
				case MethodAttributes.FamORAssem:
					return AccessOverlayIcon.ProtectedInternal;
				case MethodAttributes.Private:
					return AccessOverlayIcon.Private;
				case MethodAttributes.CompilerControlled:
					return AccessOverlayIcon.CompilerControlled;
				default:
					throw new NotSupportedException();
			}
		}

		public override FilterResult Filter(FilterSettings settings)
		{
			if (!settings.ShowInternalApi && !IsPublicAPI)
				return FilterResult.Hidden;
			if (settings.SearchTermMatches(EventDefinition.Name) && settings.Language.ShowMember(EventDefinition))
				return FilterResult.Match;
			else
				return FilterResult.Hidden;
		}
		
		public override void Decompile(Language language, ITextOutput output, DecompilationOptions options)
		{
			language.DecompileEvent(EventDefinition, output, options);
		}
		
		
		public override bool IsPublicAPI {
			get {
				MethodDefinition accessor = EventDefinition.AddMethod ?? EventDefinition.RemoveMethod;
				return accessor != null && (accessor.IsPublic || accessor.IsFamilyOrAssembly || accessor.IsFamily);
			}
		}

		MemberReference IMemberTreeNode.Member => EventDefinition;
	}
}