} // End GetTextBetweenPointers.
// </Snippet_TextPointer_GetTextInRun>
// <Snippet_TextPointer_IsInSameDocument>
// This method first checks for compatible text container scope, and then checks whether
// a specified position is between two other specified positions.
bool IsPositionContainedBetween(TextPointer positionToTest, TextPointer start, TextPointer end)
{
// Note that without this check, an exception will be raised by CompareTo if positionToTest
// does not point to a position that is in the same text container used by start and end.
//
// This test also implicitely indicates whether start and end share a common text container.
if (!positionToTest.IsInSameDocument(start) || !positionToTest.IsInSameDocument(end))
return false;
return start.CompareTo(positionToTest) <= 0 && positionToTest.CompareTo(end) <= 0;
}
public int GetIndex(TextPointer tp, LogicalDirection dir)
{
Debug.Assert(tp.IsInSameDocument(Doc.ContentStart));
tp = tp.GetInsertionPosition(dir);
if (tp.Parent is FlowDocument)
{
return(0);
}
TextElement parent = (TextElement)tp.Parent;
int index = FindStartIndex(parent);
if (index < 0)
{
return(-1);
}
if (parent is Run)
{
return(index + parent.ContentStart.GetOffsetToPosition(tp));
}
else
{
return(index);
}
}