// Licensed to the .NET Foundation under one or more agreements.

// The .NET Foundation licenses this file to you under the MS-PL license.

// See the LICENSE file in the project root for more information.

namespace ReactiveUI

{

using System;

/// <summary>

/// Allows an additional string to make view resolution more specific than

/// just a type. When applied to your <see cref="IViewFor{T}"/> -derived

/// View, you can select between different Views for a single ViewModel

/// instance.

/// </summary>

public class ViewContractAttribute : Attribute

{

/// <summary>

/// Constructs the ViewContractAttribute with a specific contract value.

/// </summary>

/// <param name="contract">The value of the contract for view

/// resolution.</param>

public ViewContractAttribute(string contract)

{

Contract = contract;

}

public string Contract { get; }

}

/// <summary>

/// Indicates that this View should be constructed _once_ and then used

/// every time its ViewModel View is resolved.

/// Obviously, this is not supported on Views that may be reused multiple

/// times in the Visual Tree.

/// </summary>

public class SingleInstanceViewAttribute : Attribute

{

}

}