Decouple some global logic from the MainWindow

Directory.Packages.props

@@ -46,6 +46,7 @@
     <PackageVersion Include="System.Resources.Extensions" Version="8.0.0" />
     <PackageVersion Include="System.Runtime.CompilerServices.Unsafe" Version="6.0.0" />
     <PackageVersion Include="TomsToolbox.Wpf.Composition" Version="2.18.1" />
+    <PackageVersion Include="TomsToolbox.Wpf.Composition.Mef" Version="2.18.1" />
     <PackageVersion Include="TomsToolbox.Wpf.Styles" Version="2.18.1" />
     <PackageVersion Include="coverlet.collector" Version="6.0.2" />
   </ItemGroup>

ILSpy/Analyzers/AnalyzeCommand.cs

@@ -16,21 +16,30 @@
 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
-using System;
 using System.ComponentModel.Composition;
 using System.Linq;
+using System.Windows;
 
-using ICSharpCode.Decompiler.Metadata;
 using ICSharpCode.Decompiler.TypeSystem;
 using ICSharpCode.ILSpy.Properties;
 using ICSharpCode.ILSpy.TreeNodes;
 
+using TomsToolbox.Composition;
+
 namespace ICSharpCode.ILSpy.Analyzers
 {
 	[ExportContextMenuEntry(Header = nameof(Resources.Analyze), Icon = "Images/Search", Category = nameof(Resources.Analyze), InputGestureText = "Ctrl+R", Order = 100)]
 	[PartCreationPolicy(CreationPolicy.Shared)]
 	internal sealed class AnalyzeCommand : SimpleCommand, IContextMenuEntry
 	{
+		private static readonly IExport<AnalyzerTreeView> analyzerTreeViewExport = App.ExportProvider.GetExports<AnalyzerTreeView>().Single();
+
+		private static AnalyzerTreeView AnalyzerTreeView {
+			get {
+				return Application.Current?.MainWindow?.IsLoaded != true ? null : analyzerTreeViewExport.Value;
+			}
+		}
+
 		public bool IsVisible(TextViewContext context)
 		{
 			if (context.TreeView is AnalyzerTreeView && context.SelectedTreeNodes != null && context.SelectedTreeNodes.All(n => n.Parent.IsRoot))
@@ -43,14 +52,12 @@ namespace ICSharpCode.ILSpy.Analyzers
 		public bool IsEnabled(TextViewContext context)
 		{
 			if (context.SelectedTreeNodes == null)
-				return context.Reference != null && context.Reference.Reference is IEntity;
-			foreach (IMemberTreeNode node in context.SelectedTreeNodes)
 			{
-				if (!IsValidReference(node.Member))
-					return false;
+				return context.Reference is { Reference: IEntity };
 			}
-
-			return true;
+			return context.SelectedTreeNodes
+				.OfType<IMemberTreeNode>()
+				.All(node => IsValidReference(node.Member));
 		}
 
 		bool IsValidReference(object reference)
@@ -60,52 +67,56 @@ namespace ICSharpCode.ILSpy.Analyzers
 
 		public void Execute(TextViewContext context)
 		{
-			AnalyzerTreeView analyzerTreeView = MainWindow.Instance.AnalyzerTreeView;
-			if (analyzerTreeView == null)
+			if (AnalyzerTreeView is null)
 			{
 				return;
 			}
 			if (context.SelectedTreeNodes != null)
 			{
-				foreach (IMemberTreeNode node in context.SelectedTreeNodes)
+				foreach (var node in context.SelectedTreeNodes.OfType<IMemberTreeNode>().ToArray())
 				{
-					analyzerTreeView.Analyze(node.Member);
+					AnalyzerTreeView.Analyze(node.Member);
 				}
 			}
-			else if (context.Reference != null && context.Reference.Reference is IEntity entity)
+			else if (context.Reference is { Reference: IEntity entity })
 			{
-				analyzerTreeView.Analyze(entity);
+				AnalyzerTreeView.Analyze(entity);
 			}
 		}
 
 		public override bool CanExecute(object parameter)
 		{
-			AnalyzerTreeView analyzerTreeView = MainWindow.Instance.AnalyzerTreeView;
-			if (analyzerTreeView != null && analyzerTreeView.IsKeyboardFocusWithin)
+			if (AnalyzerTreeView is null)
 			{
-				return analyzerTreeView.SelectedItems.OfType<object>().All(n => n is IMemberTreeNode);
+				return false;
 			}
-			else
+
+			if (AnalyzerTreeView is { IsKeyboardFocusWithin: true })
 			{
-				return MainWindow.Instance.SelectedNodes.All(n => n is IMemberTreeNode);
+				return AnalyzerTreeView.SelectedItems.OfType<object>().All(n => n is IMemberTreeNode);
 			}
+
+			return MainWindow.Instance.SelectedNodes.All(n => n is IMemberTreeNode);
 		}
 
 		public override void Execute(object parameter)
 		{
-			AnalyzerTreeView analyzerTreeView = MainWindow.Instance.AnalyzerTreeView;
-			if (analyzerTreeView != null && analyzerTreeView.IsKeyboardFocusWithin)
+			if (AnalyzerTreeView is null)
+			{
+				return;
+			}
+			if (AnalyzerTreeView.IsKeyboardFocusWithin)
 			{
-				foreach (IMemberTreeNode node in MainWindow.Instance.AnalyzerTreeView.SelectedItems.OfType<IMemberTreeNode>().ToArray())
+				foreach (var node in AnalyzerTreeView.SelectedItems.OfType<IMemberTreeNode>().ToArray())
 				{
-					MainWindow.Instance.AnalyzerTreeView.Analyze(node.Member);
+					AnalyzerTreeView.Analyze(node.Member);
 				}
 			}
 			else
 			{
-				foreach (IMemberTreeNode node in MainWindow.Instance.SelectedNodes)
+				foreach (var node in MainWindow.Instance.SelectedNodes.OfType<IMemberTreeNode>())
 				{
-					MainWindow.Instance.AnalyzerTreeView.Analyze(node.Member);
+					AnalyzerTreeView.Analyze(node.Member);
 				}
 			}
 		}

ILSpy/Analyzers/AnalyzerTreeView.cs

@@ -19,6 +19,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Specialized;
+using System.ComponentModel.Composition;
 using System.Linq;
 using System.Windows;
 
@@ -30,11 +31,16 @@ using ICSharpCode.ILSpyX;
 using ICSharpCode.ILSpy.Controls.TreeView;
 using ICSharpCode.ILSpyX.TreeView;
 
+using TomsToolbox.Wpf.Composition.Mef;
+
 namespace ICSharpCode.ILSpy.Analyzers
 {
 	/// <summary>
 	/// Analyzer tree view.
 	/// </summary>
+	[DataTemplate(typeof(AnalyzerPaneModel))]
+	[PartCreationPolicy(CreationPolicy.Shared)]
+	[Export]
 	public class AnalyzerTreeView : SharpTreeView
 	{
 		FilterSettings filterSettings;

ILSpy/ILSpy.csproj

@@ -51,6 +51,7 @@
     <PackageReference Include="Microsoft.Xaml.Behaviors.Wpf" />
     <PackageReference Include="NaturalSort.Extension" />
     <PackageReference Include="TomsToolbox.Wpf.Composition" />
+    <PackageReference Include="TomsToolbox.Wpf.Composition.Mef" />
     <PackageReference Include="TomsToolbox.Wpf.Styles" />
   </ItemGroup>
 

ILSpy/MainWindow.xaml

@@ -2,8 +2,8 @@
 <Window
 	x:Class="ICSharpCode.ILSpy.MainWindow"
 	x:ClassModifier="public"
-	xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
-	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
+	xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 	xmlns:tv="clr-namespace:ICSharpCode.ILSpy.Controls.TreeView"
 	xmlns:local="clr-namespace:ICSharpCode.ILSpy"
 	xmlns:search="clr-namespace:ICSharpCode.ILSpy.Search"
@@ -67,29 +67,10 @@
 				</Style>
 			</tv:SharpTreeView.ItemContainerStyle>
 		</tv:SharpTreeView>
-
 		<DataTemplate DataType="{x:Type viewModels:AssemblyListPaneModel}">
 			<ContentControl Content="{StaticResource AssemblyTreeView}" />
 		</DataTemplate>
 
-		<local:DebugSteps x:Key="DebugSteps" />
-
-		<DataTemplate DataType="{x:Type viewModels:DebugStepsPaneModel}">
-			<ContentControl Content="{StaticResource DebugSteps}" />
-		</DataTemplate>
-
-		<search:SearchPane x:Key="SearchPane" />
-
-		<DataTemplate DataType="{x:Type viewModels:SearchPaneModel}">
-			<ContentControl Content="{StaticResource SearchPane}" />
-		</DataTemplate>
-
-		<analyzers:AnalyzerTreeView x:Key="AnalyzerTreeView" />
-
-		<DataTemplate DataType="{x:Type viewModels:AnalyzerPaneModel}">
-			<ContentControl Content="{StaticResource AnalyzerTreeView}" />
-		</DataTemplate>
-
 		<DataTemplate DataType="{x:Type viewModels:TabPageModel}">
 			<ContentPresenter Content="{Binding Content}" />
 		</DataTemplate>

ILSpy/MainWindow.xaml.cs

@@ -31,7 +31,6 @@ using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Data;
 using System.Windows.Input;
-using System.Windows.Interop;
 using System.Windows.Media;
 using System.Windows.Navigation;
 using System.Windows.Threading;
@@ -98,15 +97,9 @@ namespace ICSharpCode.ILSpy
 			}
 		}
 
-		public AnalyzerTreeView AnalyzerTreeView {
-			get {
-				return !IsLoaded ? null : FindResource("AnalyzerTreeView") as AnalyzerTreeView;
-			}
-		}
-
 		public SearchPane SearchPane {
 			get {
-				return FindResource("SearchPane") as SearchPane;
+				return App.ExportProvider.GetExportedValue<SearchPane>();
 			}
 		}
 

ILSpy/Search/SearchPane.cs

@@ -40,11 +40,15 @@ using ICSharpCode.ILSpyX;
 using ICSharpCode.ILSpyX.Extensions;
 using ICSharpCode.ILSpyX.Search;
 
+using TomsToolbox.Wpf.Composition.Mef;
+
 namespace ICSharpCode.ILSpy.Search
 {
 	/// <summary>
 	/// Search pane
 	/// </summary>
+	[DataTemplate(typeof(SearchPaneModel))]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	public partial class SearchPane : UserControl
 	{
 		const int MAX_RESULTS = 1000;

ILSpy/Views/DebugSteps.xaml.cs

@@ -1,5 +1,6 @@
 using System;
 using System.ComponentModel;
+using System.ComponentModel.Composition;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
@@ -9,8 +10,12 @@ using ICSharpCode.Decompiler.IL.Transforms;
 using ICSharpCode.ILSpy.Docking;
 using ICSharpCode.ILSpy.ViewModels;
 
+using TomsToolbox.Wpf.Composition.Mef;
+
 namespace ICSharpCode.ILSpy
 {
+	[DataTemplate(typeof(DebugStepsPaneModel))]
+	[PartCreationPolicy(CreationPolicy.NonShared)]
 	public partial class DebugSteps : UserControl
 	{
 		static readonly ILAstWritingOptions writingOptions = new ILAstWritingOptions {