This interface provides methods for getting and setting various drawing
attributes. During painting draw layer receives draw context and it is
expected to either leave draw parameters as they are or change them.
author: Miloslav Metelka version: 1.00
Get the position in the document where the buffer starts. The area
between getDrawStartOffset() and getDrawEndOffset
will contain valid characters. However the first token can start even
under getDrawStartOffset(). In this case the valid area
starts at getTokenOffset() of the first token.