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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 Microsoft.VisualStudio.Utilities;
/// <summary>
/// Provides data about a change of <see cref="IContentType"/> on a member of a <see cref="IBufferGraph"/>.
/// </summary>
public class GraphBufferContentTypeChangedEventArgs : EventArgs
{
private ITextBuffer textBuffer;
private IContentType beforeContentType;
private IContentType afterContentType;
/// <summary>
/// Initializes a new instance of <see cref="GraphBufferContentTypeChangedEventArgs"/> with the specified
/// text buffer and the old and new content types.
/// </summary>
/// <param name="textBuffer">The <see cref="ITextBuffer"/> whose <see cref="IContentType"/> has changed.</param>
/// <param name="beforeContentType">The <see cref="IContentType"/> before the change.</param>
/// <param name="afterContentType">The <see cref="IContentType"/> after the change.</param>
/// <exception cref="ArgumentNullException">One of <paramref name="textBuffer"/>, <paramref name="beforeContentType"/>,
/// or <paramref name="afterContentType"/> is null.</exception>
public GraphBufferContentTypeChangedEventArgs(ITextBuffer textBuffer, IContentType beforeContentType, IContentType afterContentType)
{
if (textBuffer == null)
{
throw new ArgumentNullException(nameof(textBuffer));
}
if (beforeContentType == null)
{
throw new ArgumentNullException(nameof(beforeContentType));
}
if (afterContentType == null)
{
throw new ArgumentNullException(nameof(afterContentType));
}
this.textBuffer = textBuffer;
this.beforeContentType = beforeContentType;
this.afterContentType = afterContentType;
}
/// <summary>
/// The <see cref="ITextBuffer"/> whose <see cref="IContentType"/> has changed.
/// </summary>
public ITextBuffer TextBuffer
{
get { return this.textBuffer; }
}
/// <summary>
/// The <see cref="IContentType"/> before the change.
/// </summary>
public IContentType BeforeContentType
{
get { return this.beforeContentType; }
}
/// <summary>
/// The <see cref="IContentType"/> after the change.
/// </summary>
public IContentType AfterContentType
{
get { return this.afterContentType; }
}
}
}
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