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// 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 more information.
using System;
using MS.Internal.Automation;
using System.Windows.Automation;
namespace System.Windows.Automation
{
/// <summary>
/// Condition that checks whether a pattern is currently present for a LogicalElement
/// </summary>
#if (INTERNAL_COMPILE)
internal class NotCondition : Condition
#else
public class NotCondition : Condition
#endif
{
//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
/// <summary>
/// Constructor to create a condition that negates the specified condition
/// </summary>
/// <param name="condition">Condition to negate</param>
public NotCondition( Condition condition )
{
ArgumentNullException.ThrowIfNull(condition);
_condition = condition;
// DangerousGetHandle() reminds us that the IntPtr we get back could be collected/released/recycled. We're safe here,
// because the Conditions are structured in a tree, with the root one (which gets passed to the Uia API) keeping all
// others - and their associated data - alive. (Recycling isn't an issue as these are immutable classes.)
SetMarshalData(new UiaCoreApi.UiaNotCondition(_condition._safeHandle.DangerousGetHandle()));
}
#endregion Constructors
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
#region Public Properties
/// <summary>
/// Returns the sub condition that this condition is negating.
/// </summary>
public Condition Condition
{
get
{
return _condition;
}
}
#endregion Public Properties
//------------------------------------------------------
//
// Private Fields
//
//------------------------------------------------------
#region Private Fields
Condition _condition;
#endregion Private Fields
}
}
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