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....Hutao/Snap.Hutao/Control/Behavior/PeriodicInvokeCommandOrOnActualThemeChangedBehavior.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| // Copyright (c) DGP Studio. All rights reserved. | ||
| // Licensed under the MIT license. | ||
|
|
||
| using CommunityToolkit.WinUI.Behaviors; | ||
| using Microsoft.UI.Xaml; | ||
|
|
||
| namespace Snap.Hutao.Control.Behavior; | ||
|
|
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| [DependencyProperty("Period", typeof(TimeSpan))] | ||
| [DependencyProperty("Command", typeof(ICommand))] | ||
| [DependencyProperty("CommandParameter", typeof(object))] | ||
| internal sealed partial class PeriodicInvokeCommandOrOnActualThemeChangedBehavior : BehaviorBase<FrameworkElement>, IDisposable | ||
| { | ||
| private TaskCompletionSource acutalThemeChangedTaskCompletionSource = new(); | ||
| private CancellationTokenSource periodicTimerCancellationTokenSource = new(); | ||
|
|
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| public void Dispose() | ||
| { | ||
| periodicTimerCancellationTokenSource.Dispose(); | ||
| } | ||
|
|
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| protected override bool Initialize() | ||
| { | ||
| AssociatedObject.ActualThemeChanged += OnActualThemeChanged; | ||
| return true; | ||
| } | ||
|
|
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| protected override void OnAssociatedObjectLoaded() | ||
| { | ||
| RunCoreAsync().SafeForget(); | ||
| } | ||
|
|
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| protected override bool Uninitialize() | ||
| { | ||
| AssociatedObject.ActualThemeChanged -= OnActualThemeChanged; | ||
| return true; | ||
| } | ||
|
|
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| private void OnActualThemeChanged(FrameworkElement sender, object args) | ||
| { | ||
| acutalThemeChangedTaskCompletionSource.TrySetResult(); | ||
| periodicTimerCancellationTokenSource.Cancel(); | ||
| } | ||
|
|
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| private void TryExecuteCommand() | ||
| { | ||
| if (AssociatedObject is null) | ||
| { | ||
| return; | ||
| } | ||
|
|
||
| if (Command is not null && Command.CanExecute(CommandParameter)) | ||
| { | ||
| Command.Execute(CommandParameter); | ||
| } | ||
| } | ||
|
|
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| private async ValueTask RunCoreAsync() | ||
| { | ||
| using (PeriodicTimer timer = new(Period)) | ||
| { | ||
| do | ||
| { | ||
| if (!IsAttached) | ||
| { | ||
| break; | ||
| } | ||
|
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| TryExecuteCommand(); | ||
|
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| try | ||
| { | ||
| Task nextTickTask = timer.WaitForNextTickAsync(periodicTimerCancellationTokenSource.Token).AsTask(); | ||
| await Task.WhenAny(nextTickTask, acutalThemeChangedTaskCompletionSource.Task).ConfigureAwait(false); | ||
| } | ||
| catch (OperationCanceledException) | ||
| { | ||
| } | ||
|
|
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| acutalThemeChangedTaskCompletionSource = new(); | ||
| periodicTimerCancellationTokenSource = new(); | ||
| } | ||
| while (true); | ||
| } | ||
| } | ||
| } |
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