Use SourceCache, set SelectedItem and scroll to it

src/Core/FileTime.Core.Abstraction/Extensions/DynamicDataExtensions.cs

@@ -41,7 +41,7 @@ public static class DynamicDataExtensions
     }
 
     public static async Task<IEnumerable<AbsolutePath>?> GetItemsAsync(
-        this IObservable<IObservable<IChangeSet<AbsolutePath>>?> stream)
+        this IObservable<IObservable<IChangeSet<AbsolutePath, string>>?> stream)
         => await GetItemsAsync(stream
             .Select(s =>
                 s is null
@@ -50,7 +50,7 @@ public static class DynamicDataExtensions
             .Switch());
 
     public static async Task<IEnumerable<AbsolutePath>?> GetItemsAsync(
-        this IObservable<IChangeSet<AbsolutePath>> stream)
+        this IObservable<IChangeSet<AbsolutePath, string>> stream)
         => await GetItemsAsync(stream.ToCollection());
 
     private static Task<IEnumerable<AbsolutePath>?> GetItemsAsync(

src/Core/FileTime.Core.Abstraction/Models/IContainer.cs

@@ -4,6 +4,6 @@ namespace FileTime.Core.Models;
 
 public interface IContainer : IItem
 {
-    IObservable<IObservable<IChangeSet<AbsolutePath>>?> Items { get; }
+    IObservable<IObservable<IChangeSet<AbsolutePath, string>>?> Items { get; }
     IObservable<bool> IsLoading { get; }
 }

src/Core/FileTime.Core.Abstraction/Services/ITab.cs

@@ -8,7 +8,7 @@ public interface ITab : IInitable<IContainer>, IDisposable
 {
     IObservable<IContainer?> CurrentLocation { get; }
     IObservable<AbsolutePath?> CurrentSelectedItem { get; }
-    IObservable<IObservable<IChangeSet<IItem>>?> CurrentItems { get; }
+    IObservable<IObservable<IChangeSet<IItem, string>>?> CurrentItems { get; }
     FullName? LastDeepestSelectedPath { get; }
 
     void SetCurrentLocation(IContainer newLocation);

src/Core/FileTime.Core.ContentAccess/ContentProviderBase.cs

@@ -11,10 +11,10 @@ public abstract class ContentProviderBase : IContentProvider
 {
     private readonly ReadOnlyExtensionCollection _extensions;
 
-    protected BehaviorSubject<IObservable<IChangeSet<AbsolutePath>>?> Items { get; } = new(null);
+    protected BehaviorSubject<IObservable<IChangeSet<AbsolutePath, string>>?> Items { get; } = new(null);
     protected ExtensionCollection Extensions { get; }
 
-    IObservable<IObservable<IChangeSet<AbsolutePath>>?> IContainer.Items => Items;
+    IObservable<IObservable<IChangeSet<AbsolutePath, string>>?> IContainer.Items => Items;
 
     public string Name { get; }
 

src/Core/FileTime.Core.Models/Container.cs

@@ -25,7 +25,7 @@ public record Container(
     PointInTime PointInTime,
     IObservable<IEnumerable<Exception>> Exceptions,
     ReadOnlyExtensionCollection Extensions,
-    IObservable<IObservable<IChangeSet<AbsolutePath>>?> Items) : IContainer
+    IObservable<IObservable<IChangeSet<AbsolutePath, string>>?> Items) : IContainer
 {
     BehaviorSubject<bool> IsLoading { get; } = new BehaviorSubject<bool>(false);
     IObservable<bool> IContainer.IsLoading => IsLoading.AsObservable();

src/Core/FileTime.Core.Services/Tab.cs

@@ -19,7 +19,7 @@ public class Tab : ITab
     private PointInTime _currentPointInTime;
 
     public IObservable<IContainer?> CurrentLocation { get; }
-    public IObservable<IObservable<IChangeSet<IItem>>?> CurrentItems { get; }
+    public IObservable<IObservable<IChangeSet<IItem, string>>?> CurrentItems { get; }
     public IObservable<AbsolutePath?> CurrentSelectedItem { get; }
     public FullName? LastDeepestSelectedPath { get; private set; }
 
@@ -55,9 +55,9 @@ public class Tab : ITab
                         (items, filters) => items?.Where(i => filters.All(f => f.Filter(i)))),
                     CurrentLocation
                         .Where(c => c is null)
-                        .Select(_ => (IObservable<IChangeSet<IItem>>?)null)
+                        .Select(_ => (IObservable<IChangeSet<IItem, string>>?)null)
                 )
-                .Publish((IObservable<IChangeSet<IItem>>?)null)
+                .Publish((IObservable<IChangeSet<IItem, string>>?)null)
                 .RefCount();
 
         CurrentSelectedItem =