code_review: PR #515

* remove Linq expressions due to AOT limitations. See https://learn.microsoft.com/zh-cn/dotnet/core/deploying/native-aot/?tabs=windows%2Cnet8#limitations-of-native-aot-deployment
* rename `FilteredLocks` to `VisibleLocks`
* use `Commands.Config.Get` instead of `Commands.Config.ListAll`
* disable checkbox if user name is not valid

src/Converters/ListConverters.cs

@@ -10,6 +10,9 @@ namespace SourceGit.Converters
         public static readonly FuncValueConverter<IList, string> ToCount =
             new FuncValueConverter<IList, string>(v => v == null ? " (0)" : $" ({v.Count})");
 
+        public static readonly FuncValueConverter<IList, bool> IsNullOrEmpty =
+            new FuncValueConverter<IList, bool>(v => v == null || v.Count == 0);
+
         public static readonly FuncValueConverter<IList, bool> IsNotNullOrEmpty =
             new FuncValueConverter<IList, bool>(v => v != null && v.Count > 0);
 

src/ViewModels/LFSLocks.cs

@@ -1,7 +1,6 @@
-using System.Linq;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
-using Avalonia.Collections;
 using Avalonia.Threading;
 
 using CommunityToolkit.Mvvm.ComponentModel;
@@ -10,69 +9,49 @@ namespace SourceGit.ViewModels
 {
     public class LFSLocks : ObservableObject
     {
+        public bool HasValidUserName
+        {
+            get;
+            private set;
+        } = false;
+
         public bool IsLoading
         {
             get => _isLoading;
             private set => SetProperty(ref _isLoading, value);
         }
-
-        public bool IsEmpty
-        {
-            get => _isEmpty;
-            private set => SetProperty(ref _isEmpty, value);
-        }
         
         public bool ShowOnlyMyLocks
         {
             get => _showOnlyMyLocks;
             set
             {
-                if (!SetProperty(ref _showOnlyMyLocks, value))
-                    return;
-
-                OnPropertyChanged(nameof(FilteredLocks));
-                IsEmpty = !FilteredLocks.Any();
+                if (SetProperty(ref _showOnlyMyLocks, value))
+                    UpdateVisibleLocks();
             }
         }
 
-        private AvaloniaList<Models.LFSLock> Locks
+        public List<Models.LFSLock> VisibleLocks
         {
-            get;
-        }
-
-        public AvaloniaList<Models.LFSLock> FilteredLocks
-        {
-            get
-            {
-                if (string.IsNullOrEmpty(_userName))
-                {
-                    App.RaiseException(_repo, "Username is empty");
-                    return Locks;
-                }
-
-                return _showOnlyMyLocks ?
-                    new AvaloniaList<Models.LFSLock>(Locks.Where(@lock => @lock.User == _userName)) :
-                    Locks;
-            }
+            get => _visibleLocks;
+            private set => SetProperty(ref _visibleLocks, value);
         }
 
         public LFSLocks(string repo, string remote)
         {
             _repo = repo;
             _remote = remote;
-            Locks = new AvaloniaList<Models.LFSLock>();
-            new Commands.Config(repo).ListAll().TryGetValue("user.name", out _userName);
+            _userName = new Commands.Config(repo).Get("user.name");
+
+            HasValidUserName = !string.IsNullOrEmpty(_userName);
 
             Task.Run(() =>
             {
-                var collect = new Commands.LFS(_repo).Locks(_remote);
+                _cachedLocks = new Commands.LFS(_repo).Locks(_remote);
                 Dispatcher.UIThread.Invoke(() =>
                 {
-                    if (collect.Count > 0)
-                        Locks.AddRange(collect);
-
+                    UpdateVisibleLocks();
                     IsLoading = false;
-                    IsEmpty = collect.Count == 0;
                 });
             });
         }
@@ -89,18 +68,40 @@ namespace SourceGit.ViewModels
                 Dispatcher.UIThread.Invoke(() =>
                 {
                     if (succ)
-                        Locks.Remove(lfsLock);
+                    {
+                        _cachedLocks.Remove(lfsLock);
+                        UpdateVisibleLocks();
+                    }
 
                     IsLoading = false;
-                    IsEmpty = Locks.Count == 0;
                 });
             });
         }
 
+        private void UpdateVisibleLocks()
+        {
+            if (!_showOnlyMyLocks)
+            {
+                VisibleLocks = _cachedLocks;
+            }
+            else
+            {
+                var visible = new List<Models.LFSLock>();
+                foreach (var lfsLock in _cachedLocks)
+                {
+                    if (lfsLock.User == _userName)
+                        visible.Add(lfsLock);
+                }
+
+                VisibleLocks = visible;
+            }
+        }
+
         private string _repo;
         private string _remote;
         private bool _isLoading = true;
-        private bool _isEmpty = false;
+        private List<Models.LFSLock> _cachedLocks = [];
+        private List<Models.LFSLock> _visibleLocks = [];
         private bool _showOnlyMyLocks = false;
         private string _userName;
     }

src/Views/LFSLocks.axaml

@@ -5,6 +5,7 @@
                     xmlns:m="using:SourceGit.Models"
                     xmlns:vm="using:SourceGit.ViewModels"
                     xmlns:v="using:SourceGit.Views"
+                    xmlns:c="using:SourceGit.Converters"
                     mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
                     x:Class="SourceGit.Views.LFSLocks"
                     x:DataType="vm:LFSLocks"
@@ -44,19 +45,24 @@
     </Grid>
 
     <!-- Filter and Unlock All -->
-    <Grid Grid.Row="1" ColumnDefinitions="Auto,*,Auto" Margin="8,0,0,0">
-      <CheckBox Grid.Column="0"
-                Content="Show only my locks"
-                IsChecked="{Binding ShowOnlyMyLocks}"
-                IsEnabled="{Binding !IsLoading}"
-                VerticalAlignment="Center" />
-    </Grid>
+    <CheckBox Grid.Row="1"
+              Margin="8,0,0,0"
+              Content="Show only my locks"
+              IsChecked="{Binding ShowOnlyMyLocks, Mode=TwoWay}"
+              VerticalAlignment="Center">
+      <CheckBox.IsEnabled>
+        <MultiBinding Converter="{x:Static BoolConverters.And}">
+          <Binding Path="HasValidUserName"/>
+          <Binding Path="!IsLoading"/>
+        </MultiBinding>
+      </CheckBox.IsEnabled>
+    </CheckBox>
 
     <!-- Locked Files -->
     <Grid Grid.Row="2">
       <ListBox Margin="8,0,8,8"
                Background="{DynamicResource Brush.Contents}"
-               ItemsSource="{Binding FilteredLocks}"
+               ItemsSource="{Binding VisibleLocks}"
                SelectionMode="Single"
                BorderThickness="1"
                BorderBrush="{DynamicResource Brush.Border2}"
@@ -98,9 +104,14 @@
       </ListBox>
 
       <!-- Empty -->
-      <StackPanel Orientation="Vertical"
-                  HorizontalAlignment="Center" VerticalAlignment="Center"
-                  IsVisible="{Binding IsEmpty}">
+      <StackPanel Orientation="Vertical" HorizontalAlignment="Center" VerticalAlignment="Center">
+        <StackPanel.IsVisible>
+          <MultiBinding Converter="{x:Static BoolConverters.And}">
+            <Binding Path="!IsLoading"/>
+            <Binding Path="VisibleLocks" Converter="{x:Static c:ListConverters.IsNullOrEmpty}"/>
+          </MultiBinding>
+        </StackPanel.IsVisible>
+        
         <Path Width="48" Height="48" Data="{StaticResource Icons.Empty}" Fill="{DynamicResource Brush.FG2}"/>
         <TextBlock Margin="0,16,0,0" Text="{DynamicResource Text.GitLFS.Locks.Empty}" Foreground="{DynamicResource Brush.FG2}"/>
       </StackPanel>