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IProjectionSnapshot.MapToSourceSnapshot Method (Int32, PositionAffinity)

Maps a position in the projection snapshot to the corresponding position in a source snapshot.

Namespace:  Microsoft.VisualStudio.Text.Projection
Assembly:  Microsoft.VisualStudio.Text.Data (in Microsoft.VisualStudio.Text.Data.dll)

Syntax

'宣言
Function MapToSourceSnapshot ( _
    position As Integer, _
    affinity As PositionAffinity _
) As SnapshotPoint
SnapshotPoint MapToSourceSnapshot(
    int position,
    PositionAffinity affinity
)
SnapshotPoint MapToSourceSnapshot(
    int position, 
    PositionAffinity affinity
)
abstract MapToSourceSnapshot : 
        position:int * 
        affinity:PositionAffinity -> SnapshotPoint 
function MapToSourceSnapshot(
    position : int, 
    affinity : PositionAffinity
) : SnapshotPoint

Parameters

  • position
    Type: System.Int32
    The position in the projection snapshot .
  • affinity
    Type: Microsoft.VisualStudio.Text.PositionAffinity
    If the mapping is ambiguous (the position lies on a source span seam), this parameter affects the mapping as follows:
    if affinity is Predecessor, the mapping targets the position immediately after the preceding character in the projection buffer
    if affinity is Successor, the mapping targets the position immediately before the following character in the projection buffer.
    This parameter has no effect if the mapping is unambiguous.

Return Value

Type: Microsoft.VisualStudio.Text.SnapshotPoint
A snapshot point in one of the source snapshots.

Exceptions

Exception Condition
ArgumentOutOfRangeException

position is less than zero or greater than or equal to the length of the snapshot.

InvalidOperationException

The projection snapshot has no source spans.

Remarks

In general, a source span seam occurs at the end of a source span of nonzero length and the beginning of a source span of nonzero length, and coincides with zero or more source spans of zero length. Every span on a seam has a point in the result collection.

.NET Framework Security

See Also

Reference

IProjectionSnapshot Interface

MapToSourceSnapshot Overload

Microsoft.VisualStudio.Text.Projection Namespace