Frequency navigation WIP

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

@@ -1,4 +1,5 @@
 using System.Reactive.Linq;
+using DynamicData;
 using FileTime.Core.ContentAccess;
 using FileTime.Core.Enums;
 using FileTime.Core.Timeline;
@@ -21,7 +22,7 @@ public interface IItem
     string? Attributes { get; }
     AbsolutePathType Type { get; }
     PointInTime PointInTime { get; }
-    IObservable<IEnumerable<Exception>> Exceptions { get; }
+    IObservable<IChangeSet<Exception>> Exceptions { get; }
     ReadOnlyExtensionCollection Extensions { get; }
 
     T? GetExtension<T>() => (T?)Extensions.FirstOrDefault(i => i is T);

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

@@ -0,0 +1,15 @@
+using FileTime.Core.Services;
+
+namespace FileTime.Core.Models;
+
+public class TabLocationChanged : EventArgs
+{
+    public FullName Location { get; }
+    public ITab Tab { get; }
+    
+    public TabLocationChanged(FullName location, ITab tab)
+    {
+        Location = location;
+        Tab = tab;
+    }
+}

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

@@ -0,0 +1,9 @@
+using FileTime.Core.Models;
+
+namespace FileTime.Core.Services;
+
+public interface ITabEvents
+{
+    event EventHandler<TabLocationChanged> LocationChanged;
+    void OnLocationChanged(ITab tab, FullName location);
+}

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

@@ -48,7 +48,8 @@ public abstract class ContentProviderBase : IContentProvider
     public AbsolutePathType Type => AbsolutePathType.Container;
     public PointInTime PointInTime { get; } = PointInTime.Eternal;
 
-    public IObservable<IEnumerable<Exception>> Exceptions => Observable.Return(Enumerable.Empty<Exception>());
+    protected SourceList<Exception> Exceptions { get; } = new();
+    IObservable<IChangeSet<Exception>> IItem.Exceptions => Exceptions.Connect();
 
     ReadOnlyExtensionCollection IItem.Extensions => _extensions;
 

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

@@ -22,7 +22,7 @@ public record Container(
     IContentProvider Provider,
     bool AllowRecursiveDeletion,
     PointInTime PointInTime,
-    IObservable<IEnumerable<Exception>> Exceptions,
+    IObservable<IChangeSet<Exception>> Exceptions,
     ReadOnlyExtensionCollection Extensions,
     IObservable<IObservable<IChangeSet<AbsolutePath, string>>?> Items) : IContainer
 {

src/Core/FileTime.Core.Models/Element.cs

@@ -1,3 +1,4 @@
+using DynamicData;
 using FileTime.Core.ContentAccess;
 using FileTime.Core.Enums;
 using FileTime.Core.Timeline;
@@ -18,7 +19,7 @@ public record Element(
     string? Attributes,
     IContentProvider Provider,
     PointInTime PointInTime,
-    IObservable<IEnumerable<Exception>> Exceptions,
+    IObservable<IChangeSet<Exception>> Exceptions,
     ReadOnlyExtensionCollection Extensions) : IElement
 {
     public AbsolutePathType Type => AbsolutePathType.Element;

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

@@ -12,6 +12,7 @@ namespace FileTime.Core.Services;
 public class Tab : ITab
 {
     private readonly ITimelessContentProvider _timelessContentProvider;
+    private readonly ITabEvents _tabEvents;
     private readonly BehaviorSubject<IContainer?> _currentLocation = new(null);
     private readonly BehaviorSubject<IContainer?> _currentLocationForced = new(null);
     private readonly BehaviorSubject<AbsolutePath?> _currentSelectedItem = new(null);
@@ -24,9 +25,10 @@ public class Tab : ITab
     public IObservable<AbsolutePath?> CurrentSelectedItem { get; }
     public FullName? LastDeepestSelectedPath { get; private set; }
 
-    public Tab(ITimelessContentProvider timelessContentProvider)
+    public Tab(ITimelessContentProvider timelessContentProvider, ITabEvents tabEvents)
     {
         _timelessContentProvider = timelessContentProvider;
+        _tabEvents = tabEvents;
         _currentPointInTime = null!;
 
         _timelessContentProvider.CurrentPointInTime.Subscribe(p => _currentPointInTime = p);
@@ -60,7 +62,7 @@ public class Tab : ITab
                     ),
                     CurrentLocation
                         .Where(c => c is null)
-                        .Select(_ => (IObservable<IChangeSet<IItem, string>>?)null)
+                        .Select(_ => (IObservable<IChangeSet<IItem, string>>?) null)
                 )
                 .Publish(null)
                 .RefCount();
@@ -137,8 +139,25 @@ public class Tab : ITab
         return newSelectedItem;
     }
 
-    public void SetCurrentLocation(IContainer newLocation) => _currentLocation.OnNext(newLocation);
-    public void ForceSetCurrentLocation(IContainer newLocation) => _currentLocationForced.OnNext(newLocation);
+    public void SetCurrentLocation(IContainer newLocation)
+    {
+        _currentLocation.OnNext(newLocation);
+
+        if (newLocation.FullName != null)
+        {
+            _tabEvents.OnLocationChanged(this, newLocation.FullName);
+        }
+    }
+
+    public void ForceSetCurrentLocation(IContainer newLocation)
+    {
+        _currentLocationForced.OnNext(newLocation);
+
+        if (newLocation.FullName != null)
+        {
+            _tabEvents.OnLocationChanged(this, newLocation.FullName);
+        }
+    }
 
     public void SetSelectedItem(AbsolutePath newSelectedItem) => _currentSelectedItem.OnNext(newSelectedItem);
 

src/Core/FileTime.Core.Services/TabEvents.cs

@@ -0,0 +1,13 @@
+using FileTime.Core.Models;
+
+namespace FileTime.Core.Services;
+
+public class TabEvents : ITabEvents
+{
+    public event EventHandler<TabLocationChanged> LocationChanged;
+    
+    public void OnLocationChanged(ITab tab, FullName location)
+    {
+        LocationChanged?.Invoke(this, new TabLocationChanged(location, tab));
+    }
+}