Refactor resource loading.

ICSharpCode.Decompiler/Metadata/Dom.cs

@@ -35,6 +35,23 @@ namespace ICSharpCode.Decompiler.Metadata
 		public abstract Stream TryOpenStream();
 	}
 
+	public class ByteArrayResource : Resource
+	{
+		public override string Name { get; }
+		byte[] data;
+
+		public ByteArrayResource(string name, byte[] data)
+		{
+			this.Name = name ?? throw new ArgumentNullException(nameof(name));
+			this.data = data ?? throw new ArgumentNullException(nameof(data));
+		}
+
+		public override Stream TryOpenStream()
+		{
+			return new MemoryStream(data);
+		}
+	}
+
 	sealed class MetadataResource : Resource
 	{
 		public PEFile Module { get; }

ILSpy.BamlDecompiler/BamlResourceEntryNode.cs

@@ -42,7 +42,7 @@ namespace ILSpy.BamlDecompiler
 {
 	public sealed class BamlResourceEntryNode : ResourceEntryNode
 	{
-		public BamlResourceEntryNode(string key, Stream data) : base(key, data)
+		public BamlResourceEntryNode(string key, Func<Stream> data) : base(key, data)
 		{
 		}
 
@@ -74,8 +74,8 @@ namespace ILSpy.BamlDecompiler
 		bool LoadBaml(AvalonEditTextOutput output, CancellationToken cancellationToken)
 		{
 			var asm = this.Ancestors().OfType<AssemblyTreeNode>().FirstOrDefault().LoadedAssembly;
-			Data.Position = 0;
-			XDocument xamlDocument = LoadIntoDocument(asm.GetPEFileOrNull(), asm.GetAssemblyResolver(), Data, cancellationToken);
+			using var data = OpenStream();
+			XDocument xamlDocument = LoadIntoDocument(asm.GetPEFileOrNull(), asm.GetAssemblyResolver(), data, cancellationToken);
 			output.Write(xamlDocument.ToString());
 			return true;
 		}

ILSpy.BamlDecompiler/BamlResourceNodeFactory.cs

@@ -31,13 +31,8 @@ namespace ILSpy.BamlDecompiler
 	{
 		public ILSpyTreeNode CreateNode(Resource resource)
 		{
-			return null;
-		}
-
-		public ILSpyTreeNode CreateNode(string key, object data)
-		{
-			if (key.EndsWith(".baml", StringComparison.OrdinalIgnoreCase) && data is Stream stream)
-				return new BamlResourceEntryNode(key, stream);
+			if (resource.Name.EndsWith(".baml", StringComparison.OrdinalIgnoreCase))
+				return new BamlResourceEntryNode(resource.Name, resource.TryOpenStream);
 			else
 				return null;
 		}

ILSpy/TreeNodes/ResourceNodes/CursorResourceEntryNode.cs

@@ -36,20 +36,11 @@ namespace ICSharpCode.ILSpy.TreeNodes
 
 		public ILSpyTreeNode CreateNode(Resource resource)
 		{
-			Stream stream = resource.TryOpenStream();
-			if (stream == null)
-				return null;
-			return CreateNode(resource.Name, stream);
-		}
-
-		public ILSpyTreeNode CreateNode(string key, object data)
-		{
-			if (!(data is Stream))
-				return null;
+			string key = resource.Name;
 			foreach (string fileExt in imageFileExtensions)
 			{
 				if (key.EndsWith(fileExt, StringComparison.OrdinalIgnoreCase))
-					return new CursorResourceEntryNode(key, (Stream)data);
+					return new CursorResourceEntryNode(key, resource.TryOpenStream);
 			}
 			return null;
 		}
@@ -57,8 +48,8 @@ namespace ICSharpCode.ILSpy.TreeNodes
 
 	sealed class CursorResourceEntryNode : ResourceEntryNode
 	{
-		public CursorResourceEntryNode(string key, Stream data)
-			: base(key, data)
+		public CursorResourceEntryNode(string key, Func<Stream> openStream)
+			: base(key, openStream)
 		{
 		}
 
@@ -69,19 +60,23 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			try
 			{
 				AvalonEditTextOutput output = new AvalonEditTextOutput();
-				Data.Position = 0;
 				BitmapImage image = new BitmapImage();
-
-				//HACK: windows imaging does not understand that .cur files have the same layout as .ico
-				// so load to data, and modify the ResourceType in the header to make look like an icon...
-				MemoryStream s = Data as MemoryStream;
-				if (null == s)
+				byte[] curData;
+				using (var data = OpenStream())
 				{
-					// data was stored in another stream type (e.g. PinnedBufferedMemoryStream)
-					s = new MemoryStream();
-					Data.CopyTo(s);
+					if (data == null)
+						return false;
+					//HACK: windows imaging does not understand that .cur files have the same layout as .ico
+					// so load to data, and modify the ResourceType in the header to make look like an icon...
+					MemoryStream s = data as MemoryStream;
+					if (s == null)
+					{
+						// data was stored in another stream type (e.g. PinnedBufferedMemoryStream)
+						s = new MemoryStream();
+						data.CopyTo(s);
+					}
+					curData = s.ToArray();
 				}
-				byte[] curData = s.ToArray();
 				curData[2] = 1;
 				using (Stream stream = new MemoryStream(curData))
 				{

ILSpy/TreeNodes/ResourceNodes/IResourceNodeFactory.cs

@@ -26,6 +26,5 @@ namespace ICSharpCode.ILSpy.TreeNodes
 	public interface IResourceNodeFactory
 	{
 		ILSpyTreeNode CreateNode(Resource resource);
-		ILSpyTreeNode CreateNode(string key, object data);
 	}
 }

ILSpy/TreeNodes/ResourceNodes/IconResourceEntryNode.cs

@@ -34,29 +34,17 @@ namespace ICSharpCode.ILSpy.TreeNodes
 	{
 		public ILSpyTreeNode CreateNode(Resource resource)
 		{
-			Stream stream = resource.TryOpenStream();
-			if (stream == null)
-				return null;
-			return CreateNode(resource.Name, stream);
-		}
-
-		public ILSpyTreeNode CreateNode(string key, object data)
-		{
-			if (data is System.Drawing.Icon)
+			if (resource.Name.EndsWith(".ico", StringComparison.OrdinalIgnoreCase))
 			{
-				MemoryStream s = new MemoryStream();
-				((System.Drawing.Icon)data).Save(s);
-				return new IconResourceEntryNode(key, s);
+				return new IconResourceEntryNode(resource.Name, resource.TryOpenStream);
 			}
-			if (data is Stream && key.EndsWith(".ico", StringComparison.OrdinalIgnoreCase))
-				return new IconResourceEntryNode(key, (Stream)data);
 			return null;
 		}
 	}
 
 	sealed class IconResourceEntryNode : ResourceEntryNode
 	{
-		public IconResourceEntryNode(string key, Stream data)
+		public IconResourceEntryNode(string key, Func<Stream> data)
 			: base(key, data)
 		{
 		}
@@ -68,8 +56,10 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			try
 			{
 				AvalonEditTextOutput output = new AvalonEditTextOutput();
-				Data.Position = 0;
-				IconBitmapDecoder decoder = new IconBitmapDecoder(Data, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.None);
+				using var data = OpenStream();
+				if (data == null)
+					return false;
+				IconBitmapDecoder decoder = new IconBitmapDecoder(data, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.None);
 				foreach (var frame in decoder.Frames)
 				{
 					output.Write(String.Format("{0}x{1}, {2} bit: ", frame.PixelHeight, frame.PixelWidth, frame.Thumbnail.Format.BitsPerPixel));

ILSpy/TreeNodes/ResourceNodes/ImageListResourceEntryNode.cs

@@ -18,6 +18,7 @@
 
 using System.ComponentModel.Composition;
 using System.Drawing;
+using System.IO;
 using System.Windows.Forms;
 
 using ICSharpCode.Decompiler;
@@ -65,7 +66,9 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			int i = 0;
 			foreach (Image image in this.data.Images)
 			{
-				var node = ResourceEntryNode.Create("Image" + i.ToString(), image);
+				using var s = new MemoryStream();
+				image.Save(s, System.Drawing.Imaging.ImageFormat.Bmp);
+				var node = ResourceEntryNode.Create("Image" + i.ToString(), s.ToArray());
 				if (node != null)
 					Children.Add(node);
 				++i;

ILSpy/TreeNodes/ResourceNodes/ImageResourceEntryNode.cs

@@ -36,26 +36,11 @@ namespace ICSharpCode.ILSpy.TreeNodes
 
 		public ILSpyTreeNode CreateNode(Resource resource)
 		{
-			Stream stream = resource.TryOpenStream();
-			if (stream == null)
-				return null;
-			return CreateNode(resource.Name, stream);
-		}
-
-		public ILSpyTreeNode CreateNode(string key, object data)
-		{
-			if (data is System.Drawing.Image)
-			{
-				MemoryStream s = new MemoryStream();
-				((System.Drawing.Image)data).Save(s, System.Drawing.Imaging.ImageFormat.Bmp);
-				return new ImageResourceEntryNode(key, s);
-			}
-			if (!(data is Stream))
-				return null;
+			string key = resource.Name;
 			foreach (string fileExt in imageFileExtensions)
 			{
 				if (key.EndsWith(fileExt, StringComparison.OrdinalIgnoreCase))
-					return new ImageResourceEntryNode(key, (Stream)data);
+					return new ImageResourceEntryNode(key, resource.TryOpenStream);
 			}
 			return null;
 		}
@@ -63,8 +48,8 @@ namespace ICSharpCode.ILSpy.TreeNodes
 
 	sealed class ImageResourceEntryNode : ResourceEntryNode
 	{
-		public ImageResourceEntryNode(string key, Stream data)
-			: base(key, data)
+		public ImageResourceEntryNode(string key, Func<Stream> openStream)
+			: base(key, openStream)
 		{
 		}
 
@@ -75,10 +60,9 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			try
 			{
 				AvalonEditTextOutput output = new AvalonEditTextOutput();
-				Data.Position = 0;
 				BitmapImage image = new BitmapImage();
 				image.BeginInit();
-				image.StreamSource = Data;
+				image.StreamSource = OpenStream();
 				image.EndInit();
 				output.AddUIElement(() => new Image { Source = image });
 				output.WriteLine();

ILSpy/TreeNodes/ResourceNodes/ResourceEntryNode.cs

@@ -20,6 +20,7 @@ using System;
 using System.IO;
 
 using ICSharpCode.Decompiler;
+using ICSharpCode.Decompiler.Metadata;
 using ICSharpCode.ILSpy.TextView;
 
 using Microsoft.Win32;
@@ -32,42 +33,47 @@ namespace ICSharpCode.ILSpy.TreeNodes
 	public class ResourceEntryNode : ILSpyTreeNode
 	{
 		private readonly string key;
-		private readonly Stream data;
+		private readonly Func<Stream> openStream;
 
 		public override object Text => this.key;
 
 		public override object Icon => Images.Resource;
 
-		protected Stream Data => data;
+		protected Stream OpenStream()
+		{
+			return openStream();
+		}
 
-		public ResourceEntryNode(string key, Stream data)
+		public ResourceEntryNode(string key, Func<Stream> openStream)
 		{
 			if (key == null)
 				throw new ArgumentNullException(nameof(key));
-			if (data == null)
-				throw new ArgumentNullException(nameof(data));
+			if (openStream == null)
+				throw new ArgumentNullException(nameof(openStream));
 			this.key = key;
-			this.data = data;
+			this.openStream = openStream;
 		}
 
-		public static ILSpyTreeNode Create(string key, object data)
+		public static ILSpyTreeNode Create(Resource resource)
 		{
 			ILSpyTreeNode result = null;
 			foreach (var factory in App.ExportProvider.GetExportedValues<IResourceNodeFactory>())
 			{
-				result = factory.CreateNode(key, data);
+				result = factory.CreateNode(resource);
 				if (result != null)
-					return result;
+					break;
 			}
-			var streamData = data as Stream;
-			if (streamData != null)
-				result = new ResourceEntryNode(key, data as Stream);
+			return result ?? new ResourceTreeNode(resource);
+		}
 
-			return result;
+		public static ILSpyTreeNode Create(string name, byte[] data)
+		{
+			return Create(new ByteArrayResource(name, data));
 		}
 
 		public override void Decompile(Language language, ITextOutput output, DecompilationOptions options)
 		{
+			using var data = OpenStream();
 			language.WriteCommentLine(output, string.Format("{0} = {1}", key, data));
 		}
 
@@ -77,12 +83,9 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			dlg.FileName = Path.GetFileName(DecompilerTextView.CleanUpName(key));
 			if (dlg.ShowDialog() == true)
 			{
-				var data = this.Data;
-				data.Position = 0;
-				using (var fs = dlg.OpenFile())
-				{
-					data.CopyTo(fs);
-				}
+				using var data = OpenStream();
+				using var fs = dlg.OpenFile();
+				data.CopyTo(fs);
 			}
 			return true;
 		}

ILSpy/TreeNodes/ResourceNodes/ResourceTreeNode.cs

@@ -119,14 +119,7 @@ namespace ICSharpCode.ILSpy.TreeNodes
 
 		public static ILSpyTreeNode Create(Resource resource)
 		{
-			ILSpyTreeNode result = null;
-			foreach (var factory in App.ExportProvider.GetExportedValues<IResourceNodeFactory>())
-			{
-				result = factory.CreateNode(resource);
-				if (result != null)
-					break;
-			}
-			return result ?? new ResourceTreeNode(resource);
+			return ResourceEntryNode.Create(resource);
 		}
 	}
 }

ILSpy/TreeNodes/ResourceNodes/ResourcesFileTreeNode.cs

@@ -99,14 +99,7 @@ namespace ICSharpCode.ILSpy.TreeNodes
 
 			if (entry.Value is byte[])
 			{
-				Children.Add(ResourceEntryNode.Create(entry.Key, new MemoryStream((byte[])entry.Value)));
-				return;
-			}
-
-			var node = ResourceEntryNode.Create(entry.Key, entry.Value);
-			if (node != null)
-			{
-				Children.Add(node);
+				Children.Add(ResourceEntryNode.Create(entry.Key, (byte[])entry.Value));
 				return;
 			}
 

ILSpy/TreeNodes/ResourceNodes/XamlResourceNode.cs

@@ -34,13 +34,8 @@ namespace ICSharpCode.ILSpy.Xaml
 	{
 		public ILSpyTreeNode CreateNode(Resource resource)
 		{
-			return null;
-		}
-
-		public ILSpyTreeNode CreateNode(string key, object data)
-		{
-			if (key.EndsWith(".xaml", StringComparison.OrdinalIgnoreCase) && data is Stream)
-				return new XamlResourceEntryNode(key, (Stream)data);
+			if (resource.Name.EndsWith(".xaml", StringComparison.OrdinalIgnoreCase))
+				return new XamlResourceEntryNode(resource.Name, resource.TryOpenStream);
 			else
 				return null;
 		}
@@ -50,7 +45,7 @@ namespace ICSharpCode.ILSpy.Xaml
 	{
 		string xaml;
 
-		public XamlResourceEntryNode(string key, Stream data) : base(key, data)
+		public XamlResourceEntryNode(string key, Func<Stream> openStream) : base(key, openStream)
 		{
 		}
 
@@ -67,7 +62,14 @@ namespace ICSharpCode.ILSpy.Xaml
 							// cache read XAML because stream will be closed after first read
 							if (xaml == null)
 							{
-								using (var reader = new StreamReader(Data))
+								using var data = OpenStream();
+								if (data == null)
+								{
+									output.Write("ILSpy: Failed opening resource stream.");
+									output.WriteLine();
+									return output;
+								}
+								using (var reader = new StreamReader(data))
 								{
 									xaml = reader.ReadToEnd();
 								}

ILSpy/TreeNodes/ResourceNodes/XmlResourceNode.cs

@@ -36,20 +36,11 @@ namespace ICSharpCode.ILSpy.Xaml
 
 		public ILSpyTreeNode CreateNode(Resource resource)
 		{
-			Stream stream = resource.TryOpenStream();
-			if (stream == null)
-				return null;
-			return CreateNode(resource.Name, stream);
-		}
-
-		public ILSpyTreeNode CreateNode(string key, object data)
-		{
-			if (!(data is Stream))
-				return null;
+			string key = resource.Name;
 			foreach (string fileExt in xmlFileExtensions)
 			{
 				if (key.EndsWith(fileExt, StringComparison.OrdinalIgnoreCase))
-					return new XmlResourceEntryNode(key, (Stream)data);
+					return new XmlResourceEntryNode(key, resource.TryOpenStream);
 			}
 			return null;
 		}
@@ -59,7 +50,7 @@ namespace ICSharpCode.ILSpy.Xaml
 	{
 		string xml;
 
-		public XmlResourceEntryNode(string key, Stream data)
+		public XmlResourceEntryNode(string key, Func<Stream> data)
 			: base(key, data)
 		{
 		}
@@ -91,7 +82,14 @@ namespace ICSharpCode.ILSpy.Xaml
 							// cache read XAML because stream will be closed after first read
 							if (xml == null)
 							{
-								using (var reader = new StreamReader(Data))
+								using var data = OpenStream();
+								if (data == null)
+								{
+									output.Write("ILSpy: Failed opening resource stream.");
+									output.WriteLine();
+									return output;
+								}
+								using (var reader = new StreamReader(data))
 								{
 									xml = reader.ReadToEnd();
 								}