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Improve RevisionDataGridView responsiveness
(cherry picked from commit 4bbe805)
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GitUI/UserControls/RevisionGrid/RevisionDataGridView.BackgroundUpdater.cs
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using System; | ||
using System.Threading.Tasks; | ||
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namespace GitUI.UserControls.RevisionGrid | ||
{ | ||
public sealed partial class RevisionDataGridView | ||
{ | ||
/// <summary> | ||
/// Coordinates background update executions. Requested reruns only "queue up" upto one. | ||
/// </summary> | ||
private class BackgroundUpdater | ||
{ | ||
private readonly Func<Task> _operation; | ||
private readonly int _cooldownMilliseconds; | ||
private readonly object _sync = new(); | ||
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private volatile bool _executing; | ||
private volatile bool _rerunRequested; | ||
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public BackgroundUpdater(Func<Task> operation, int cooldownMilliseconds) | ||
{ | ||
_operation = operation ?? throw new ArgumentNullException(nameof(operation)); | ||
_cooldownMilliseconds = cooldownMilliseconds; | ||
} | ||
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public void ScheduleExcecution() | ||
{ | ||
lock (_sync) | ||
{ | ||
if (!_executing) | ||
{ | ||
// if not running, start it | ||
_executing = true; | ||
Task.Run(WrappedOperationAsync); | ||
} | ||
else | ||
{ | ||
// if currently running make sure it runs again | ||
_rerunRequested = true; | ||
} | ||
} | ||
} | ||
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private async Task WrappedOperationAsync() | ||
{ | ||
await _operation(); | ||
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if (_rerunRequested) | ||
{ | ||
await Task.Delay(_cooldownMilliseconds); | ||
} | ||
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lock (_sync) | ||
{ | ||
if (_rerunRequested) | ||
{ | ||
Task.Run(WrappedOperationAsync); | ||
_rerunRequested = false; | ||
} | ||
else | ||
{ | ||
_executing = false; | ||
} | ||
} | ||
} | ||
} | ||
} | ||
} |
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