ILSpy/ILSpy/Commands/OpenContainingFolderContextMenuEntry.cs

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using System.Collections.Generic;
using System.Composition;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;

using ICSharpCode.ILSpy.Properties;
using ICSharpCode.ILSpyX.TreeView;

using ILSpy.TreeNodes;
using ILSpy.Util;

namespace ILSpy.Commands
{
	/// <summary>
	/// Right-click → "Open Containing Folder". Walks up the selection's parent chain to the
	/// enclosing <see cref="AssemblyTreeNode"/> (so it works on members and namespaces, not
	/// just the assembly row itself) and asks the OS file manager to reveal that file.
	/// </summary>
	[ExportContextMenuEntry(Header = nameof(Resources._OpenContainingFolder), Category = nameof(Resources.Shell), Icon = "Images/FolderOpen", Order = 500)]
	[Shared]
	public sealed class OpenContainingFolderContextMenuEntry : IContextMenuEntry
	{
		public bool IsVisible(TextViewContext context) => GetPathsToReveal(context).Count > 0;

		public bool IsEnabled(TextViewContext context) => GetPathsToReveal(context).Count > 0;

		public void Execute(TextViewContext context)
		{
			foreach (var path in GetPathsToReveal(context))
				ShellHelper.RevealFile(path);
		}

		/// <summary>Public for tests: returns the on-disk file paths the reveal would target,
		/// in selection order. Each path is guaranteed to exist; deep selections trace up to
		/// the enclosing assembly.</summary>
		public IReadOnlyList<string> GetPathsToReveal(TextViewContext context)
		{
			if (context.SelectedTreeNodes is not { Length: > 0 } nodes)
				return System.Array.Empty<string>();
			var paths = new List<string>(nodes.Length);
			foreach (var node in nodes)
			{
				var assembly = AssemblyTreeNode.FindEnclosing(node);
				if (assembly is null)
					return System.Array.Empty<string>();
				var path = assembly.LoadedAssembly.FileName;
				if (!File.Exists(path))
					return System.Array.Empty<string>();
				paths.Add(path);
			}
			return paths;
		}


	}
}