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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.
//
// This file contain implementations details that are subject to change without notice.
// Use at your own risk.
//
namespace Microsoft.VisualStudio.Text.Implementation
{
using System;
internal sealed class ForwardFidelityCustomTrackingSpan : ForwardFidelityTrackingSpan
{
object customState;
CustomTrackToVersion behavior;
public ForwardFidelityCustomTrackingSpan(TextVersion version, Span span, object customState, CustomTrackToVersion behavior)
: base(version, span, SpanTrackingMode.Custom)
{
if (behavior == null)
{
throw new ArgumentNullException("behavior");
}
this.behavior = behavior;
this.customState = customState;
}
protected override Span TrackSpanForwardInTime(Span span, ITextVersion currentVersion, ITextVersion targetVersion)
{
return behavior(this, currentVersion, targetVersion, span, this.customState);
}
protected override Span TrackSpanBackwardInTime(Span span, ITextVersion currentVersion, ITextVersion targetVersion)
{
return behavior(this, currentVersion, targetVersion, span, this.customState);
}
}
}
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