feat(toolbar): the group editor's add list follows the field switches

src/Filee.App/ViewModels/GroupEditorViewModel.cs

@@ -5,6 +5,7 @@
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using Filee.App.Services;
+using Filee.Core.Formats;
 using Filee.Core.Localization;
 using Filee.Core.Presets;
 using Filee.Core.Settings;
@@ -48,7 +49,10 @@ public GroupEditorViewModel(Preset group, UserDataStore store, ILocalizer loc, b
     /// <summary>The presets the group fans out, in order.</summary>
     public ObservableCollection<GroupMember> Members { get; } = [];
 
-    /// <summary>Actions that can still be added (not groups, not already in it).</summary>
+    /// <summary>
+    /// Actions that can still be added (not groups, not already in it), without the ones whose target belongs only to
+    /// turned-off fields, like the toolbar editor's palette. Members already in the group stay.
+    /// </summary>
     public ObservableCollection<Choice<string>> Available { get; } = [];
 
     [ObservableProperty]
@@ -139,8 +143,9 @@ public void Delete()
     private void Refresh()
     {
         var taken = Members.Select(m => m.PresetId).ToHashSet();
+        var off = _store.Settings.TurnedOffFieldSet();
         Available.Clear();
-        foreach (var preset in _store.Presets.Where(p => !p.IsGroup && !taken.Contains(p.Id)))
+        foreach (var preset in _store.Presets.Where(p => !p.IsGroup && !taken.Contains(p.Id) && FormatFields.IsShown(p.TargetFormat, off)))
             Available.Add(new Choice<string>(preset.Id, _loc.DisplayName(preset), CaptionOf(preset)));
         OnPropertyChanged(nameof(IsFull));
         OnPropertyChanged(nameof(IsEmpty));

tests/Filee.App.Tests/GroupEditorTests.cs

@@ -30,6 +30,33 @@ private static void Add(GroupEditorViewModel vm, string presetId)
         vm.AddCommand.Execute(null);
     }
 
+    [AvaloniaFact]
+    public void Presets_of_turned_off_fields_are_not_offered_but_members_stay()
+    {
+        TestServices.EnsureInitialized("en");
+        var settings = AppHost.Get<UserDataStore>().Settings;
+        var off = settings.TurnedOffFields;
+        settings.TurnedOffFields = ["font"];
+        try
+        {
+            var vm = Edit(new Preset { Name = "Fonts", Kind = PresetKind.Group, SubPresetIds = ["to-ttf"] });
+            Assert.Equal("to-ttf", Assert.Single(vm.Members).PresetId); // saved members aren't dropped (rule 7)
+            Assert.DoesNotContain(vm.Available, c => c.Value == "to-otf");
+            Assert.Contains(vm.Available, c => c.Value == "to-eot"); // also in Old formats, which is on
+            Assert.Contains(vm.Available, c => c.Value == "to-png");
+
+            vm.RemoveCommand.Execute(vm.Members[0]);
+            Assert.DoesNotContain(vm.Available, c => c.Value == "to-ttf");
+
+            settings.TurnedOffFields = [];
+            Assert.Contains(Edit(new Preset { Name = "Fonts", Kind = PresetKind.Group }).Available, c => c.Value == "to-otf");
+        }
+        finally
+        {
+            settings.TurnedOffFields = off;
+        }
+    }
+
     [AvaloniaFact]
     public void Presets_are_added_in_order_moved_and_removed_then_saved_into_the_group()
     {