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| 1 | +// Copyright (c) Microsoft Corporation. All rights reserved. |
| 2 | +// Licensed under the MIT license. |
| 3 | + |
| 4 | +using System; |
| 5 | +using System.Threading.Tasks; |
| 6 | +using Microsoft.ClearScript.Util; |
| 7 | + |
| 8 | +namespace Microsoft.ClearScript.JavaScript |
| 9 | +{ |
| 10 | + public static partial class JavaScriptExtensions |
| 11 | + { |
| 12 | + /// <summary> |
| 13 | + /// Converts a <see cref="ValueTask{T}"/> instance to a |
| 14 | + /// <see href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise">promise</see> |
| 15 | + /// for use with script code currently running on the calling thread. |
| 16 | + /// </summary> |
| 17 | + /// <typeparam name="T">The task's result type.</typeparam> |
| 18 | + /// <param name="valueTask">The task to convert to a promise.</param> |
| 19 | + /// <returns>A promise that represents the task's asynchronous operation.</returns> |
| 20 | + /// <remarks> |
| 21 | + /// This method is not available on .NET Framework or Universal Windows Platform (UWP). |
| 22 | + /// </remarks> |
| 23 | + public static object ToPromise<T>(this ValueTask<T> valueTask) |
| 24 | + { |
| 25 | + return valueTask.ToPromise(ScriptEngine.Current); |
| 26 | + } |
| 27 | + |
| 28 | + /// <summary> |
| 29 | + /// Converts a <see cref="ValueTask{T}"/> instance to a |
| 30 | + /// <see href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise">promise</see> |
| 31 | + /// for use with script code running in the specified script engine. |
| 32 | + /// </summary> |
| 33 | + /// <typeparam name="T">The task's result type.</typeparam> |
| 34 | + /// <param name="valueTask">The task to convert to a promise.</param> |
| 35 | + /// <param name="engine">The script engine in which the promise will be used.</param> |
| 36 | + /// <returns>A promise that represents the task's asynchronous operation.</returns> |
| 37 | + /// <remarks> |
| 38 | + /// This method is not available on .NET Framework or Universal Windows Platform (UWP). |
| 39 | + /// </remarks> |
| 40 | + public static object ToPromise<T>(this ValueTask<T> valueTask, ScriptEngine engine) |
| 41 | + { |
| 42 | + MiscHelpers.VerifyNonNullArgument(valueTask, nameof(valueTask)); |
| 43 | + MiscHelpers.VerifyNonNullArgument(engine, nameof(engine)); |
| 44 | + |
| 45 | + var javaScriptEngine = engine as IJavaScriptEngine; |
| 46 | + if ((javaScriptEngine == null) || (javaScriptEngine.BaseLanguageVersion < 6)) |
| 47 | + { |
| 48 | + throw new NotSupportedException("The script engine does not support promises"); |
| 49 | + } |
| 50 | + |
| 51 | + return javaScriptEngine.CreatePromiseForValueTask(valueTask); |
| 52 | + } |
| 53 | + |
| 54 | + /// <summary> |
| 55 | + /// Converts a <see cref="ValueTask"/> instance to a |
| 56 | + /// <see href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise">promise</see> |
| 57 | + /// for use with script code currently running on the calling thread. |
| 58 | + /// </summary> |
| 59 | + /// <param name="valueTask">The task to convert to a promise.</param> |
| 60 | + /// <returns>A promise that represents the task's asynchronous operation.</returns> |
| 61 | + /// <remarks> |
| 62 | + /// This method is not available on .NET Framework or Universal Windows Platform (UWP). |
| 63 | + /// </remarks> |
| 64 | + public static object ToPromise(this ValueTask valueTask) |
| 65 | + { |
| 66 | + return valueTask.ToPromise(ScriptEngine.Current); |
| 67 | + } |
| 68 | + |
| 69 | + /// <summary> |
| 70 | + /// Converts a <see cref="ValueTask"/> instance to a |
| 71 | + /// <see href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise">promise</see> |
| 72 | + /// for use with script code running in the specified script engine. |
| 73 | + /// </summary> |
| 74 | + /// <param name="valueTask">The task to convert to a promise.</param> |
| 75 | + /// <param name="engine">The script engine in which the promise will be used.</param> |
| 76 | + /// <returns>A promise that represents the task's asynchronous operation.</returns> |
| 77 | + /// <remarks> |
| 78 | + /// This method is not available on .NET Framework or Universal Windows Platform (UWP). |
| 79 | + /// </remarks> |
| 80 | + public static object ToPromise(this ValueTask valueTask, ScriptEngine engine) |
| 81 | + { |
| 82 | + MiscHelpers.VerifyNonNullArgument(valueTask, nameof(valueTask)); |
| 83 | + MiscHelpers.VerifyNonNullArgument(engine, nameof(engine)); |
| 84 | + |
| 85 | + var javaScriptEngine = engine as IJavaScriptEngine; |
| 86 | + if ((javaScriptEngine == null) || (javaScriptEngine.BaseLanguageVersion < 6)) |
| 87 | + { |
| 88 | + throw new NotSupportedException("The script engine does not support promises"); |
| 89 | + } |
| 90 | + |
| 91 | + return javaScriptEngine.CreatePromiseForValueTask(valueTask); |
| 92 | + } |
| 93 | + } |
| 94 | +} |
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