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//
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
//
namespace Microsoft.VisualStudio.Text.Tagging
{
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
/// <summary>
/// Provides a list of all mapping spans where tags have changed since the last BatchedTagsChanged event.
/// The BatchedTagsChanged event is raised on the same thread as the thread that created the tag aggregator.
/// </summary>
public class BatchedTagsChangedEventArgs : EventArgs
{
ReadOnlyCollection<IMappingSpan> _spans;
/// <summary>
/// Initializes a new instance of <see cref="BatchedTagsChangedEventArgs"/> with the specified list of <see cref="IMappingSpan" />s.
/// </summary>
/// <param name="spans">The list of <see cref="IMappingSpan" />s where the tags have changed.</param>
/// <exception cref="ArgumentNullException"><paramref name="spans"/> is null.</exception>
public BatchedTagsChangedEventArgs(IList<IMappingSpan> spans)
{
if (spans == null)
throw new ArgumentNullException(nameof(spans));
//Make a copy of spans so we don't need to worry about it changing.
_spans = new ReadOnlyCollection<IMappingSpan>(new List<IMappingSpan>(spans));
}
/// <summary>
/// The list of <see cref="IMappingSpan" />s where the tags have changed.
/// </summary>
public ReadOnlyCollection<IMappingSpan> Spans { get { return _spans; } }
}
}
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