/// <summary>
/// Translates this snapshot span to a different snapshot of the same <see cref="ITextBuffer"/>.
/// </summary>
/// <param name="targetSnapshot">The snapshot to which to translate.</param>
/// <param name="spanTrackingMode">The <see cref="SpanTrackingMode"/> to use in the translation.</param>
/// <returns>A new snapshot span.</returns>
/// <exception cref="ArgumentNullException"><paramref name="targetSnapshot"/> is null.</exception>
/// <exception cref="ArgumentException"><paramref name="targetSnapshot"/> does not refer to the same <see cref="ITextBuffer"/> as this snapshot span.</exception>
public SnapshotSpan TranslateTo(ITextSnapshot targetSnapshot, SpanTrackingMode spanTrackingMode)
{
if (targetSnapshot == this.Snapshot)
{
return(this);
}
else
{
if (targetSnapshot == null)
{
throw new ArgumentNullException("targetSnapshot");
}
if (targetSnapshot.TextBuffer != this.Start.Snapshot.TextBuffer)
{
throw new ArgumentException(Strings.InvalidSnapshot);
}
Span targetSpan = targetSnapshot.Version.VersionNumber > this.Snapshot.Version.VersionNumber
? Tracking.TrackSpanForwardInTime(spanTrackingMode, Span, this.Snapshot.Version, targetSnapshot.Version)
: Tracking.TrackSpanBackwardInTime(spanTrackingMode, Span, this.Snapshot.Version, targetSnapshot.Version);
return(new SnapshotSpan(targetSnapshot, targetSpan));
}
}
/// <summary>
/// Translates this snapshot Point to a different snapshot of the same <see cref="ITextBuffer"/>.
/// </summary>
/// <param name="targetSnapshot">The snapshot to which to translate.</param>
/// <param name="trackingMode">The <see cref="PointTrackingMode"/> to use in the translation.</param>
/// <returns>A new snapshot point that has been mapped to the requested snapshot.</returns>
/// <exception cref="ArgumentNullException"><paramref name="targetSnapshot"/> is null.</exception>
/// <exception cref="ArgumentException"><paramref name="targetSnapshot"/> does not refer to the same <see cref="ITextBuffer"/> as this snapshot point.</exception>
public SnapshotPoint TranslateTo(ITextSnapshot targetSnapshot, PointTrackingMode trackingMode)
{
if (targetSnapshot == this.Snapshot)
{
return(this);
}
else
{
if (targetSnapshot == null)
{
throw new ArgumentNullException(nameof(targetSnapshot));
}
if (targetSnapshot.TextBuffer != this.Snapshot.TextBuffer)
{
throw new ArgumentException(Strings.InvalidSnapshot);
}
int targetPosition = targetSnapshot.Version.VersionNumber > this.Snapshot.Version.VersionNumber
? Tracking.TrackPositionForwardInTime(trackingMode, this.Position, this.Snapshot.Version, targetSnapshot.Version)
: Tracking.TrackPositionBackwardInTime(trackingMode, this.Position, this.Snapshot.Version, targetSnapshot.Version);
return(new SnapshotPoint(targetSnapshot, targetPosition));
}
}