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feature: Add record base C# 9 (#2751)
* Create ReactiveRecord.cs * Add IsExternalInit * Add version file bump * Fix tests
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| // Copyright (c) 2021 .NET Foundation and Contributors. All rights reserved. | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
| // See the LICENSE file in the project root for full license information. | ||
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| using System.ComponentModel; | ||
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| namespace System.Runtime.CompilerServices | ||
| { | ||
| /// <summary> | ||
| /// Reserved to be used by the compiler for tracking metadata. | ||
| /// This class should not be used by developers in source code. | ||
| /// </summary> | ||
| [EditorBrowsable(EditorBrowsableState.Never)] | ||
| internal static class IsExternalInit | ||
| { | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| // Copyright (c) 2021 .NET Foundation and Contributors. All rights reserved. | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
| // See the LICENSE file in the project root for full license information. | ||
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| using System; | ||
| using System.ComponentModel; | ||
| using System.Reactive; | ||
| using System.Runtime.Serialization; | ||
| using System.Threading; | ||
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| namespace ReactiveUI | ||
| { | ||
| /// <summary> | ||
| /// ReactiveObject is the base object for ViewModel classes, and it | ||
| /// implements INotifyPropertyChanged. In addition, ReactiveObject provides | ||
| /// Changing and Changed Observables to monitor object changes. | ||
| /// </summary> | ||
| [DataContract] | ||
| public record ReactiveRecord : IReactiveNotifyPropertyChanged<IReactiveObject>, IHandleObservableErrors, IReactiveObject | ||
| { | ||
| private readonly Lazy<IObservable<IReactivePropertyChangedEventArgs<IReactiveObject>>> _changing; | ||
| private readonly Lazy<IObservable<IReactivePropertyChangedEventArgs<IReactiveObject>>> _changed; | ||
| private readonly Lazy<Unit> _propertyChangingEventsSubscribed; | ||
| private readonly Lazy<Unit> _propertyChangedEventsSubscribed; | ||
| private readonly Lazy<IObservable<Exception>> _thrownExceptions; | ||
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| /// <summary> | ||
| /// Initializes a new instance of the <see cref="ReactiveRecord"/> class. | ||
| /// </summary> | ||
| public ReactiveRecord() | ||
| { | ||
| _changing = new Lazy<IObservable<IReactivePropertyChangedEventArgs<IReactiveObject>>>(() => ((IReactiveObject)this).GetChangingObservable(), LazyThreadSafetyMode.PublicationOnly); | ||
| _changed = new Lazy<IObservable<IReactivePropertyChangedEventArgs<IReactiveObject>>>(() => ((IReactiveObject)this).GetChangedObservable(), LazyThreadSafetyMode.PublicationOnly); | ||
| _propertyChangingEventsSubscribed = new Lazy<Unit>( | ||
| () => | ||
| { | ||
| this.SubscribePropertyChangingEvents(); | ||
| return Unit.Default; | ||
| }, | ||
| LazyThreadSafetyMode.PublicationOnly); | ||
| _propertyChangedEventsSubscribed = new Lazy<Unit>( | ||
| () => | ||
| { | ||
| this.SubscribePropertyChangedEvents(); | ||
| return Unit.Default; | ||
| }, | ||
| LazyThreadSafetyMode.PublicationOnly); | ||
| _thrownExceptions = new Lazy<IObservable<Exception>>(this.GetThrownExceptionsObservable, LazyThreadSafetyMode.PublicationOnly); | ||
| } | ||
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| /// <inheritdoc/> | ||
| public event PropertyChangingEventHandler? PropertyChanging | ||
| { | ||
| add | ||
| { | ||
| _ = _propertyChangingEventsSubscribed.Value; | ||
| PropertyChangingHandler += value; | ||
| } | ||
| remove => PropertyChangingHandler -= value; | ||
| } | ||
|
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| /// <inheritdoc/> | ||
| public event PropertyChangedEventHandler? PropertyChanged | ||
| { | ||
| add | ||
| { | ||
| _ = _propertyChangedEventsSubscribed.Value; | ||
| PropertyChangedHandler += value; | ||
| } | ||
| remove => PropertyChangedHandler -= value; | ||
| } | ||
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| private event PropertyChangingEventHandler? PropertyChangingHandler; | ||
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| private event PropertyChangedEventHandler? PropertyChangedHandler; | ||
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| /// <inheritdoc /> | ||
| [IgnoreDataMember] | ||
| public IObservable<IReactivePropertyChangedEventArgs<IReactiveObject>> Changing => _changing.Value; | ||
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| /// <inheritdoc /> | ||
| [IgnoreDataMember] | ||
| public IObservable<IReactivePropertyChangedEventArgs<IReactiveObject>> Changed => _changed.Value; | ||
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| /// <inheritdoc/> | ||
| [IgnoreDataMember] | ||
| public IObservable<Exception> ThrownExceptions => _thrownExceptions.Value; | ||
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| /// <inheritdoc/> | ||
| void IReactiveObject.RaisePropertyChanging(PropertyChangingEventArgs args) => PropertyChangingHandler?.Invoke(this, args); | ||
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| /// <inheritdoc/> | ||
| void IReactiveObject.RaisePropertyChanged(PropertyChangedEventArgs args) => PropertyChangedHandler?.Invoke(this, args); | ||
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| /// <inheritdoc/> | ||
| public IDisposable SuppressChangeNotifications() => IReactiveObjectExtensions.SuppressChangeNotifications(this); | ||
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| /// <summary> | ||
| /// Determines if change notifications are enabled or not. | ||
| /// </summary> | ||
| /// <returns>A value indicating whether change notifications are enabled.</returns> | ||
| public bool AreChangeNotificationsEnabled() => IReactiveObjectExtensions.AreChangeNotificationsEnabled(this); | ||
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| /// <summary> | ||
| /// Delays notifications until the return IDisposable is disposed. | ||
| /// </summary> | ||
| /// <returns>A disposable which when disposed will send delayed notifications.</returns> | ||
| public IDisposable DelayChangeNotifications() => IReactiveObjectExtensions.DelayChangeNotifications(this); | ||
| } | ||
| } |
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