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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.Projection
{
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
/// <summary>
/// Provides information for an edit transaction on a <see cref="IProjectionBuffer"/> in which the set of source <see cref="ITextBuffer"/> objects has changed.
/// </summary>
public class ProjectionSourceBuffersChangedEventArgs : ProjectionSourceSpansChangedEventArgs
{
private IList<ITextBuffer> addedBuffers;
private IList<ITextBuffer> removedBuffers;
/// <summary>
/// Initializes a new instance of a <see cref="ProjectionSourceBuffersChangedEventArgs"/> object.
/// </summary>
/// <param name="beforeSnapshot">The most recent <see cref="IProjectionSnapshot"/> before the change occurred.</param>
/// <param name="afterSnapshot">The <see cref="IProjectionSnapshot"/> immediately after the change occurred.</param>
/// <param name="insertedSpans">Zero or more source spans that were inserted into the <see cref="IProjectionBuffer"/>.</param>
/// <param name="deletedSpans">Zero or more source spans that were deleted from the <see cref="IProjectionBuffer"/>.</param>
/// <param name="spanPosition">The position in the list of source spans at which the buffer changes occurred.</param>
/// <param name="addedBuffers">The list of added source <see cref="ITextBuffer"/> objects.</param>
/// <param name="removedBuffers">The list of removed source <see cref="ITextBuffer"/> objects.</param>
/// <param name="options">The edit options that were applied to this change.</param>
/// <param name="editTag">An arbitrary object associated with this change.</param>
/// <exception cref="ArgumentNullException"><paramref name="insertedSpans"/> is null.</exception>
/// <exception cref="ArgumentNullException"><paramref name="deletedSpans"/> is null.</exception>
/// <exception cref="ArgumentNullException"><paramref name="addedBuffers"/> or <paramref name="removedBuffers"/> is null.</exception>
public ProjectionSourceBuffersChangedEventArgs(IProjectionSnapshot beforeSnapshot,
IProjectionSnapshot afterSnapshot,
IList<ITrackingSpan> insertedSpans,
IList<ITrackingSpan> deletedSpans,
int spanPosition,
IList<ITextBuffer> addedBuffers,
IList<ITextBuffer> removedBuffers,
EditOptions options,
object editTag)
: base(beforeSnapshot, afterSnapshot, insertedSpans, deletedSpans, spanPosition, options, editTag)
{
if (addedBuffers == null)
{
throw new ArgumentNullException(nameof(addedBuffers));
}
if (removedBuffers == null)
{
throw new ArgumentNullException(nameof(removedBuffers));
}
this.addedBuffers = addedBuffers;
this.removedBuffers = removedBuffers;
}
/// <summary>
/// The source buffers that were added to the projection buffer.
/// </summary>
public ReadOnlyCollection<ITextBuffer> AddedBuffers
{
get { return new ReadOnlyCollection<ITextBuffer>(this.addedBuffers); }
}
/// <summary>
/// The source buffers that were removed and no longer contribute spans to the projection buffer.
/// </summary>
public ReadOnlyCollection<ITextBuffer> RemovedBuffers
{
get { return new ReadOnlyCollection<ITextBuffer>(this.removedBuffers); }
}
}
}
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