Some more cleanup.

2026-04-05 13:18:50 +02:00
parent c1ab49fb1d
commit ca19297b92
22 changed files with 444 additions and 302 deletions
@@ -0,0 +1,72 @@
+using System;
+using System.Collections.Generic;
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Media;
+
+namespace Wino.Mail.WinUI.Helpers;
+
+internal static class WindowCleanupHelper
+{
+    public static void CleanupFrame(Frame? frame)
+    {
+        if (frame == null)
+            return;
+
+        CleanupObject(frame.Content);
+        frame.BackStack.Clear();
+        frame.ForwardStack.Clear();
+        frame.Content = null;
+    }
+
+    public static void CleanupObject(object? instance)
+    {
+        if (instance == null)
+            return;
+
+        var visited = new HashSet<object>(ReferenceEqualityComparer.Instance);
+        CleanupObject(instance, visited);
+    }
+
+    private static void CleanupObject(object? instance, HashSet<object> visited)
+    {
+        if (instance == null || !visited.Add(instance))
+            return;
+
+        switch (instance)
+        {
+            case Views.WinoAppShell shell:
+                shell.PrepareForWindowClose();
+                break;
+            case Frame frame:
+                CleanupFrame(frame);
+                break;
+            case BasePage page:
+                page.PrepareForClose();
+                break;
+        }
+
+        if (instance is DependencyObject dependencyObject)
+        {
+            var childCount = VisualTreeHelper.GetChildrenCount(dependencyObject);
+            for (int i = 0; i < childCount; i++)
+            {
+                CleanupObject(VisualTreeHelper.GetChild(dependencyObject, i), visited);
+            }
+        }
+
+        if (instance is IDisposable disposable)
+        {
+            disposable.Dispose();
+        }
+    }
+
+    private sealed class ReferenceEqualityComparer : IEqualityComparer<object>
+    {
+        public static ReferenceEqualityComparer Instance { get; } = new();
+
+        public new bool Equals(object? x, object? y) => ReferenceEquals(x, y);
+
+        public int GetHashCode(object obj) => System.Runtime.CompilerServices.RuntimeHelpers.GetHashCode(obj);
+    }
+}