Add CompareView and FrozenContent flag

Author: siegfriedpammer

ILSpy/AssemblyTree/AssemblyTreeModel.cs

@@ -794,6 +794,11 @@ public void DecompileSelectedNodes(DecompilerTextViewState? newState = null)
 		{
 			var activeTabPage = DockWorkspace.ActiveTabPage;
 
+			if (activeTabPage.FrozenContent)
+			{
+				activeTabPage = DockWorkspace.AddTabPage();
+			}
+
 			activeTabPage.SupportsLanguageSwitching = true;
 
 			if (SelectedItems.Length == 1)

ILSpy/Commands/CompareContextMenuEntry.cs

@@ -0,0 +1,58 @@
+// Copyright (c) 2025 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.Composition;
+
+using ICSharpCode.ILSpy.AssemblyTree;
+using ICSharpCode.ILSpy.Docking;
+using ICSharpCode.ILSpy.TreeNodes;
+using ICSharpCode.ILSpy.ViewModels;
+using ICSharpCode.ILSpy.Views;
+
+namespace ICSharpCode.ILSpy
+{
+	[ExportContextMenuEntry(Header = "Compare...", Order = 9999)]
+	[Shared]
+	internal sealed class CompareContextMenuEntry(AssemblyTreeModel assemblyTreeModel, DockWorkspace dockWorkspace) : IContextMenuEntry
+	{
+		public void Execute(TextViewContext context)
+		{
+			var left = ((AssemblyTreeNode)context.SelectedTreeNodes[0]).LoadedAssembly;
+			var right = ((AssemblyTreeNode)context.SelectedTreeNodes[1]).LoadedAssembly;
+
+			var tabPage = dockWorkspace.AddTabPage();
+
+			tabPage.Title = $"Compare {left.Text} - {right.Text}";
+			tabPage.SupportsLanguageSwitching = false;
+			tabPage.FrozenContent = true;
+			var compareView = new CompareView();
+			compareView.DataContext = new CompareViewModel(assemblyTreeModel, left, right);
+			tabPage.Content = compareView;
+		}
+
+		public bool IsEnabled(TextViewContext context)
+		{
+			return true;
+		}
+
+		public bool IsVisible(TextViewContext context)
+		{
+			return context.SelectedTreeNodes is [AssemblyTreeNode { LoadedAssembly.IsLoadedAsValidAssembly: true }, AssemblyTreeNode { LoadedAssembly.IsLoadedAsValidAssembly: true }];
+		}
+	}
+}

ILSpy/Commands/SearchMsdnContextMenuEntry.cs

@@ -17,7 +17,6 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Linq;
-using System.Threading;
 
 using ICSharpCode.ILSpy.Properties;
 using ICSharpCode.ILSpy.TreeNodes;

ILSpy/Docking/DockWorkspace.cs

@@ -118,9 +118,11 @@ private void TabPages_CollectionChanged(object sender, NotifyCollectionChangedEv
 			}
 		}
 
-		public void AddTabPage(TabPageModel tabPage = null)
+		public TabPageModel AddTabPage(TabPageModel tabPage = null)
 		{
-			tabPages.Add(tabPage ?? exportProvider.GetExportedValue<TabPageModel>());
+			TabPageModel item = tabPage ?? exportProvider.GetExportedValue<TabPageModel>();
+			tabPages.Add(item);
+			return item;
 		}
 
 		public ReadOnlyObservableCollection<TabPageModel> TabPages { get; }

ILSpy/Images/Images.cs

@@ -25,6 +25,8 @@
 
 namespace ICSharpCode.ILSpy
 {
+	using ICSharpCode.Decompiler.TypeSystem;
+
 	static class Images
 	{
 		private static readonly Rect iconRect = new Rect(0, 0, 16, 16);
@@ -212,6 +214,27 @@ public static ImageSource GetIcon(MemberIcon icon, AccessOverlayIcon overlay, bo
 				return memberIconCache.GetIcon(icon, overlay, isStatic);
 		}
 
+		public static AccessOverlayIcon GetOverlayIcon(Accessibility accessibility)
+		{
+			switch (accessibility)
+			{
+				case Accessibility.Public:
+					return AccessOverlayIcon.Public;
+				case Accessibility.Internal:
+					return AccessOverlayIcon.Internal;
+				case Accessibility.ProtectedAndInternal:
+					return AccessOverlayIcon.PrivateProtected;
+				case Accessibility.Protected:
+					return AccessOverlayIcon.Protected;
+				case Accessibility.ProtectedOrInternal:
+					return AccessOverlayIcon.ProtectedInternal;
+				case Accessibility.Private:
+					return AccessOverlayIcon.Private;
+				default:
+					return AccessOverlayIcon.CompilerControlled;
+			}
+		}
+
 		private static ImageSource GetIcon(string baseImage, string overlay = null, bool isStatic = false)
 		{
 			ImageSource baseImageSource = Load(baseImage);

ILSpy/TreeNodes/MethodTreeNode.cs

@@ -73,27 +73,6 @@ public static ImageSource GetIcon(IMethod method)
 				GetOverlayIcon(method.Accessibility), method.IsStatic);
 		}
 
-		internal static AccessOverlayIcon GetOverlayIcon(Accessibility accessibility)
-		{
-			switch (accessibility)
-			{
-				case Accessibility.Public:
-					return AccessOverlayIcon.Public;
-				case Accessibility.Internal:
-					return AccessOverlayIcon.Internal;
-				case Accessibility.ProtectedAndInternal:
-					return AccessOverlayIcon.PrivateProtected;
-				case Accessibility.Protected:
-					return AccessOverlayIcon.Protected;
-				case Accessibility.ProtectedOrInternal:
-					return AccessOverlayIcon.ProtectedInternal;
-				case Accessibility.Private:
-					return AccessOverlayIcon.Private;
-				default:
-					return AccessOverlayIcon.CompilerControlled;
-			}
-		}
-
 		public override void Decompile(Language language, ITextOutput output, DecompilationOptions options)
 		{
 			language.DecompileMethod(MethodDefinition, output, options);