Update/pre11

Directory.Build.props

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project>
   <PropertyGroup>
-    <Version>3.0.0-preview.10</Version>
+    <Version>3.0.0-preview.11</Version>
     <LangVersion>12.0</LangVersion>
     <Deterministic>true</Deterministic>
   </PropertyGroup>

src/Wpf.Ui.Demo.Mvvm/Usings.cs

@@ -3,6 +3,6 @@
 // Copyright (C) Leszek Pomianowski and WPF UI Contributors.
 // All Rights Reserved.
 
+global using System.Windows;
 global using CommunityToolkit.Mvvm.ComponentModel;
 global using CommunityToolkit.Mvvm.Input;
-global using System.Windows;

src/Wpf.Ui.Demo.Simple/MainWindow.xaml

@@ -72,7 +72,7 @@
             <ui:NavigationView.FooterMenuItems>
                 <ui:NavigationViewItem
                     Content="Settings"
-                    NavigationCacheMode="Enabled"
+                    NavigationCacheMode="Disabled"
                     TargetPageType="{x:Type pages:SettingsPage}">
                     <ui:NavigationViewItem.Icon>
                         <ui:SymbolIcon Symbol="Settings24" />

src/Wpf.Ui.Extension.Template.Compact/Usings.cs

@@ -1,5 +1,5 @@
-global using CommunityToolkit.Mvvm.ComponentModel;
-global using CommunityToolkit.Mvvm.Input;
-global using System;
+global using System;
 global using System.Windows;
+global using CommunityToolkit.Mvvm.ComponentModel;
+global using CommunityToolkit.Mvvm.Input;
 global using Wpf.Ui.Services;

src/Wpf.Ui.Extension.Template.Fluent/Usings.cs

@@ -1,5 +1,5 @@
-global using CommunityToolkit.Mvvm.ComponentModel;
-global using CommunityToolkit.Mvvm.Input;
-global using System;
+global using System;
 global using System.Windows;
+global using CommunityToolkit.Mvvm.ComponentModel;
+global using CommunityToolkit.Mvvm.Input;
 global using Wpf.Ui.Services;

src/Wpf.Ui.Gallery/Usings.cs

@@ -3,11 +3,6 @@
 // Copyright (C) Leszek Pomianowski and WPF UI Contributors.
 // All Rights Reserved.
 
-global using CommunityToolkit.Mvvm.ComponentModel;
-global using CommunityToolkit.Mvvm.Input;
-global using Microsoft.Extensions.Configuration;
-global using Microsoft.Extensions.DependencyInjection;
-global using Microsoft.Extensions.Hosting;
 global using System;
 global using System.Collections.Generic;
 global using System.Collections.ObjectModel;
@@ -25,3 +20,8 @@
 global using System.Windows.Markup;
 global using System.Windows.Media;
 global using System.Windows.Threading;
+global using CommunityToolkit.Mvvm.ComponentModel;
+global using CommunityToolkit.Mvvm.Input;
+global using Microsoft.Extensions.Configuration;
+global using Microsoft.Extensions.DependencyInjection;
+global using Microsoft.Extensions.Hosting;

src/Wpf.Ui/Controls/NavigationView/NavigationCache.cs

@@ -22,16 +22,34 @@ internal class NavigationCache
 
         if (cacheMode == NavigationCacheMode.Disabled)
         {
+#if DEBUG
+            System
+                .Diagnostics
+                .Debug
+                .WriteLine($"Cache for {entryType} is disabled. Generating instance using action...");
+#endif
+
             return generate.Invoke();
         }
 
         if (!_entires.TryGetValue(entryType, out var value))
         {
+#if DEBUG
+            System
+                .Diagnostics
+                .Debug
+                .WriteLine($"{entryType} not found in cache, generating instance using action...");
+#endif
+
             value = generate.Invoke();
 
             _entires.Add(entryType, value);
         }
 
+#if DEBUG
+        System.Diagnostics.Debug.WriteLine($"{entryType} found in cache.");
+#endif
+
         return value;
     }
 }

src/Wpf.Ui/Controls/NavigationView/NavigationCacheMode.cs

@@ -27,5 +27,5 @@ public enum NavigationCacheMode
     /// <summary>
     /// The page is cached and the cached instance is reused for every visit regardless of the cache size for the frame.
     /// </summary>
-    Reguired
+    Required
 }

src/Wpf.Ui/Controls/NavigationView/NavigationView.Navigation.cs

@@ -239,8 +239,11 @@ private void AddToJournal(INavigationViewItem viewItem, bool isBackwardsNavigate
 
 #if DEBUG
         Debug.WriteLineIf(EnableDebugMessages, $"JOURNAL INDEX {_currentIndexInJournal}");
+
         if (Journal.Count > 0)
+        {
             Debug.WriteLineIf(EnableDebugMessages, $"JOURNAL LAST ELEMENT {Journal[^1]}");
+        }
 #endif
     }
 
@@ -263,26 +266,54 @@ private object GetNavigationItemInstance(INavigationViewItem viewItem)
                 ?? throw new ArgumentNullException($"{nameof(_pageService.GetPage)} returned null");
         }
 
-        return NavigationViewActivator.CreateInstance(viewItem.TargetPageType)
-            ?? throw new ArgumentException("Failed to create instance of the page");
+        return _cache.Remember(
+                viewItem.TargetPageType,
+                viewItem.NavigationCacheMode,
+                ComputeCachedNavigationInstance
+            )
+            ?? throw new ArgumentNullException(
+                $"Unable to get or create instance of {viewItem.TargetPageType} from cache."
+            );
 
-        //return _cache.Remember(viewItem.TargetPageType, viewItem.NavigationCacheMode, () =>
-        //{
-        //    if (_serviceProvider is not null)
-        //    {
-        //        return _serviceProvider.GetService(viewItem.TargetPageType) ??
-        //               new ArgumentNullException($"{nameof(_serviceProvider.GetService)} returned null");
-        //    }
-
-        //    if (_pageService is not null)
-        //    {
-        //        return _pageService.GetPage(viewItem.TargetPageType) ??
-        //               throw new ArgumentNullException($"{nameof(_pageService.GetPage)} returned null");
-        //    }
-
-        //    return NavigationViewActivator.CreateInstance(viewItem.TargetPageType) ??
-        //        throw new ArgumentException("Failed to create instance of the page");
-        //});
+        object? ComputeCachedNavigationInstance() => GetPageInstanceFromCache(viewItem.TargetPageType);
+    }
+
+    private object? GetPageInstanceFromCache(Type? targetPageType)
+    {
+        if (targetPageType is null)
+        {
+            return default;
+        }
+
+        if (_serviceProvider is not null)
+        {
+#if DEBUG
+            System
+                .Diagnostics
+                .Debug
+                .WriteLine($"Getting {targetPageType} from cache using IServiceProvider.");
+#endif
+
+            return _serviceProvider.GetService(targetPageType)
+                ?? new ArgumentNullException($"{nameof(_serviceProvider.GetService)} returned null");
+        }
+
+        if (_pageService is not null)
+        {
+#if DEBUG
+            System.Diagnostics.Debug.WriteLine($"Getting {targetPageType} from cache using IPageService.");
+#endif
+
+            return _pageService.GetPage(targetPageType)
+                ?? throw new ArgumentNullException($"{nameof(_pageService.GetPage)} returned null");
+        }
+
+#if DEBUG
+        System.Diagnostics.Debug.WriteLine($"Getting {targetPageType} from cache using reflection.");
+#endif
+
+        return NavigationViewActivator.CreateInstance(targetPageType)
+            ?? throw new ArgumentException("Failed to create instance of the page");
     }
 
     private static void ApplyAttachedProperties(INavigationViewItem viewItem, object pageInstance)

src/Wpf.Ui/Interop/UnsafeNativeMethods.cs

@@ -297,11 +297,11 @@ public static bool ApplyWindowLegacyMicaEffect(IntPtr handle)
 
         // TODO: Validate HRESULT
         _ = Dwmapi.DwmSetWindowAttribute(
-             handle,
-             Dwmapi.DWMWINDOWATTRIBUTE.DWMWA_MICA_EFFECT,
-             ref backdropPvAttribute,
-             Marshal.SizeOf(typeof(int))
-         );
+            handle,
+            Dwmapi.DWMWINDOWATTRIBUTE.DWMWA_MICA_EFFECT,
+            ref backdropPvAttribute,
+            Marshal.SizeOf(typeof(int))
+        );
 
         return true;
     }

tests/Wpf.Ui.UnitTests/Usings.cs

@@ -3,7 +3,7 @@
 // Copyright (C) Leszek Pomianowski and WPF UI Contributors.
 // All Rights Reserved.
 
-global using NSubstitute;
 global using System;
 global using System.Windows;
+global using NSubstitute;
 global using Xunit;