// Creates a new TextPointer instance.
internal TextPointer(TextContainer textContainer, int offset, LogicalDirection direction)
{
SplayTreeNode node;
ElementEdge edge;
if (offset < 1 || offset > textContainer.InternalSymbolCount - 1)
{
throw new ArgumentException(SR.Get(SRID.BadDistance));
}
textContainer.GetNodeAndEdgeAtOffset(offset, out node, out edge);
Initialize(textContainer, (TextTreeNode)node, edge, direction, textContainer.PositionGeneration, false, false, textContainer.LayoutGeneration);
}
