修复弹幕重复的问题

src/App/Controls/Base/BiliPlayerOverlay/BiliPlayerOverlay.Handlers.cs

@@ -133,6 +133,9 @@ private void OnRequestClearDanmaku(object sender, EventArgs e)
         _danmakuView?.ClearAll();
     }
 
+    private void OnDanmakuRequestSeek(object sender, TimeSpan e)
+        => _danmakuView.ResetTimePosition(e);
+
     private void OnDanmakuListAdded(object sender, IEnumerable<DanmakuInformation> e)
     {
         InitializeDanmaku(e);

src/App/Controls/Base/BiliPlayerOverlay/BiliPlayerOverlay.Methods.cs

@@ -19,7 +19,7 @@ private void InitializeDanmakuTimer()
         {
             _danmakuTimer = new DispatcherTimer
             {
-                Interval = TimeSpan.FromSeconds(1),
+                Interval = TimeSpan.FromSeconds(0.5),
             };
             _danmakuTimer.Tick += OnDanmkuTimerTick;
         }
@@ -73,7 +73,7 @@ private void InitializeDanmaku(IEnumerable<DanmakuInformation> elements)
         {
             if (_danmakuDictionary.ContainsKey(g.Key))
             {
-                _danmakuDictionary[g.Key] = _danmakuDictionary[g.Key].Concat(g.Value).ToList();
+                _danmakuDictionary[g.Key] = g.Value.ToList();
             }
             else
             {
@@ -254,6 +254,6 @@ private void ResizeSubtitle()
             scale = 0.4;
         }
 
-        _subtitleBlock.FontSize = 22 * scale;
+        _subtitleBlock.FontSize = 20 * scale;
     }
 }

src/App/Controls/Base/BiliPlayerOverlay/BiliPlayerOverlay.cs

@@ -71,6 +71,7 @@ internal override void OnViewModelChanged(DependencyPropertyChangedEventArgs e)
             oldViewModel.DanmakuViewModel.LiveDanmakuAdded -= OnLiveDanmakuAdded;
             oldViewModel.DanmakuViewModel.SendDanmakuSucceeded -= OnSendDanmakuSucceeded;
             oldViewModel.DanmakuViewModel.PropertyChanged -= OnDanmakuViewModelPropertyChanged;
+            oldViewModel.DanmakuViewModel.RequestSeek -= OnDanmakuRequestSeek;
             oldViewModel.PropertyChanged -= OnViewModelPropertyChanged;
             oldViewModel.RequestShowTempMessage -= OnRequestShowTempMessage;
         }
@@ -82,6 +83,7 @@ internal override void OnViewModelChanged(DependencyPropertyChangedEventArgs e)
             newViewModel.DanmakuViewModel.LiveDanmakuAdded += OnLiveDanmakuAdded;
             newViewModel.DanmakuViewModel.SendDanmakuSucceeded += OnSendDanmakuSucceeded;
             newViewModel.DanmakuViewModel.PropertyChanged += OnDanmakuViewModelPropertyChanged;
+            newViewModel.DanmakuViewModel.RequestSeek += OnDanmakuRequestSeek;
             newViewModel.PropertyChanged += OnViewModelPropertyChanged;
             newViewModel.RequestShowTempMessage += OnRequestShowTempMessage;
         }

src/App/Controls/Base/BiliTransportControls.xaml.cs

@@ -151,10 +151,10 @@ private void ChangeVisualStateFromDisplayMode()
         };
     }
 
-    private void OnProgressSliderValueChanged(object sender, Microsoft.UI.Xaml.Controls.Primitives.RangeBaseValueChangedEventArgs e)
+    private void OnProgressSliderValueChanged(object sender, RangeBaseValueChangedEventArgs e)
         => ViewModel.ChangeProgressCommand.Execute(e.NewValue);
 
-    private void OnVolumeValueChanged(object sender, Microsoft.UI.Xaml.Controls.Primitives.RangeBaseValueChangedEventArgs e)
+    private void OnVolumeValueChanged(object sender, RangeBaseValueChangedEventArgs e)
     {
         if (e.NewValue != e.OldValue)
         {

src/App/Controls/Danmaku/DanmakuView/DanmakuView.Methods.cs

@@ -14,6 +14,19 @@ namespace Bili.Copilot.App.Controls.Danmaku;
 /// </summary>
 public sealed partial class DanmakuView
 {
+    /// <summary>
+    /// 重置时间戳，清除该时间戳之后的弹幕.
+    /// </summary>
+    /// <param name="position">时间戳.</param>
+    public void ResetTimePosition(TimeSpan position)
+    {
+        var discardDanmaku = _sendDanmakuList.Where(p => p.Time > position.TotalSeconds).ToArray();
+        foreach (var item in discardDanmaku)
+        {
+            Remove(item);
+        }
+    }
+
     /// <summary>
     /// 添加直播滚动弹幕.
     /// </summary>
@@ -301,6 +314,8 @@ public void Remove(DanmakuModel danmaku)
             default:
                 break;
         }
+
+        _sendDanmakuList.Remove(danmaku);
     }
 
     /// <summary>
@@ -318,6 +333,7 @@ public void ClearAll()
         _bottomContainer.Children.Clear();
         _topContainer.Children.Clear();
         _scrollContainer.Children.Clear();
+        _sendDanmakuList.Clear();
     }
 
     /// <summary>

src/App/Controls/Danmaku/DanmakuView/DanmakuView.Properties.cs

@@ -55,6 +55,7 @@ public sealed partial class DanmakuView
     private readonly List<Storyboard> _topBottomStoryList = new();
     private readonly List<Storyboard> _scrollStoryList = new();
     private readonly List<Storyboard> _positionStoryList = new();
+    private readonly List<DanmakuModel> _sendDanmakuList;
 
     private Grid _rootGrid;
     private Canvas _canvas;

src/App/Controls/Danmaku/DanmakuView/DanmakuView.cs

@@ -20,6 +20,7 @@ public DanmakuView()
         DefaultStyleKey = typeof(DanmakuView);
         DanmakuBold = false;
         DanmakuFontFamily = string.Empty;
+        _sendDanmakuList = new();
     }
 
     /// <inheritdoc/>
@@ -90,6 +91,11 @@ private void AddDanmakuInternal(DanmakuModel m, bool isOwn)
             return;
         }
 
+        if (_sendDanmakuList.Contains(m))
+        {
+            return;
+        }
+
         var danmaku = CreateNewDanmuControl(m);
 
         if (isOwn)
@@ -187,6 +193,7 @@ private void AddDanmakuInternal(DanmakuModel m, bool isOwn)
         });
 
         moveStoryboard.Begin();
+        _sendDanmakuList.Add(m);
     }
 
     private void SetDanmakuSizeZoom(double value)

src/ViewModels/Components/DanmakuModuleViewModel/DanmakuModuleViewModel.Properties.cs

@@ -91,6 +91,11 @@ public sealed partial class DanmakuModuleViewModel
     /// </summary>
     public event EventHandler<LiveDanmakuInformation> LiveDanmakuAdded;
 
+    /// <summary>
+    /// 当请求重新调整弹幕进度时触发的事件.
+    /// </summary>
+    public event EventHandler<TimeSpan> RequestSeek;
+
     /// <summary>
     /// 弹幕位置的可观察集合.
     /// </summary>

src/ViewModels/Components/DanmakuModuleViewModel/DanmakuModuleViewModel.cs

@@ -151,4 +151,8 @@ private async Task<bool> SendLiveDanmakuAsync(string danmakuText)
     [RelayCommand]
     private void AddLiveDanmaku(LiveDanmakuInformation info)
         => LiveDanmakuAdded?.Invoke(this, info);
+
+    [RelayCommand]
+    private void ResetTimePosition(TimeSpan time)
+        => RequestSeek?.Invoke(this, time);
 }

src/ViewModels/Components/PlayerDetailViewModel/PlayerDetailViewModel.Controls.cs

@@ -195,14 +195,15 @@ private void ChangeProgress(double seconds)
     {
         var ts = TimeSpan.FromSeconds(seconds);
         if (Player == null
-            || Math.Abs(ts.TotalSeconds - Player.Position.TotalSeconds) < 1)
+            || Math.Abs(ts.TotalSeconds - Player.Position.TotalSeconds) < 3)
         {
             return;
         }
 
         Player.SeekTo(ts);
         var msg = $"{ResourceToolkit.GetLocalizedString(StringNames.CurrentProgress)}: {TimeSpan.FromSeconds(seconds):g}";
         RequestShowTempMessage?.Invoke(this, msg);
+        DanmakuViewModel.ResetTimePositionCommand.Execute(ts);
     }
 
     [RelayCommand]