microsoft/teams.net
Publicmirrored fromhttps://github.com/microsoft/teams.netAvailable
Libraries/Microsoft.Teams.Common/Extensions/ActionExtensions.cs
68lines · modecode
| 1 | // Copyright (c) Microsoft Corporation. All rights reserved. |
| 2 | // Licensed under the MIT License. |
| 3 | |
| 4 | namespace Microsoft.Teams.Common.Extensions; |
| 5 | |
| 6 | public static class ActionExtensions |
| 7 | { |
| 8 | public static Action<T> Debounce<T>(this Action<T> func, int milliseconds = 300) |
| 9 | { |
| 10 | CancellationTokenSource? cancelTokenSource = null; |
| 11 | |
| 12 | return arg => |
| 13 | { |
| 14 | cancelTokenSource?.Cancel(); |
| 15 | cancelTokenSource?.Dispose(); |
| 16 | cancelTokenSource = new CancellationTokenSource(); |
| 17 | |
| 18 | _ = Task.Delay(milliseconds, cancelTokenSource.Token) |
| 19 | .ContinueWith(t => |
| 20 | { |
| 21 | if (t.IsCompletedSuccessfully) |
| 22 | { |
| 23 | try |
| 24 | { |
| 25 | func(arg); |
| 26 | } |
| 27 | catch |
| 28 | { |
| 29 | // Observe exception to prevent UnobservedTaskException. |
| 30 | // Callers use fire-and-forget; there is no upstream to propagate to. |
| 31 | } |
| 32 | } |
| 33 | }, TaskScheduler.Default); |
| 34 | }; |
| 35 | } |
| 36 | |
| 37 | public static Action Debounce(this Func<Task> func, int milliseconds = 300) |
| 38 | { |
| 39 | CancellationTokenSource? cancelTokenSource = null; |
| 40 | |
| 41 | return () => |
| 42 | { |
| 43 | cancelTokenSource?.Cancel(); |
| 44 | cancelTokenSource?.Dispose(); |
| 45 | cancelTokenSource = new CancellationTokenSource(); |
| 46 | |
| 47 | _ = DebounceCore(func, milliseconds, cancelTokenSource.Token); |
| 48 | }; |
| 49 | |
| 50 | static async Task DebounceCore(Func<Task> func, int milliseconds, CancellationToken token) |
| 51 | { |
| 52 | try |
| 53 | { |
| 54 | await Task.Delay(milliseconds, token).ConfigureAwait(false); |
| 55 | await func().ConfigureAwait(false); |
| 56 | } |
| 57 | catch (OperationCanceledException) |
| 58 | { |
| 59 | // Debounce was cancelled by a newer invocation |
| 60 | } |
| 61 | catch (Exception) |
| 62 | { |
| 63 | // Observe exception to prevent UnobservedTaskException. |
| 64 | // Callers use fire-and-forget; there is no upstream to propagate to. |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 | } |
| 69 | |