IMarkSelection (Eclipse Platform API Specification)

All Superinterfaces:

ISelection

All Known Implementing Classes:

MarkSelection
```
public interface IMarkSelection
extends ISelection
```
A mark selection can be sent out by text viewers. By checking the type of the selection selection listeners can determine whether a selection event is about a mark or a normal text selection.
This interface is not intended to be implemented by clients other than ITextViewer implementers.

Since:

2.0

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`IDocument`	`getDocument()`	Returns the marked document.
`int`	`getLength()`	Returns the length of the mark selection.
`int`	`getOffset()`	Returns the mark position.

Methods inherited from interface org.eclipse.jface.viewers.ISelection
isEmpty

- Method Detail
  - getDocument
```
IDocument getDocument()
```
    Returns the marked document.
    
    Returns:
    
    the marked document
  - getOffset
```
int getOffset()
```
    Returns the mark position. The offset may be -1 if there's no marked region.
    
    Returns:
    
    the mark position or -1 if there is no marked region
  - getLength
```
int getLength()
```
    Returns the length of the mark selection. The length may be negative, if the caret is before the mark position. The length has no meaning if getOffset() returns -1.
    
    Returns:
    
    the length of the mark selection. Result is undefined for getOffset == -1