Bug 40788 [plan item] Configurable Next/Previous actions
Toolbar drop down, or editor specific control. Needs to be coordinated with Platform UI.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
}
	
				int start= offset;
	
				offset= anchor;
				int length= document.getLength();
	
				while (offset < length) {
					c= document.getChar(offset);
					if (!Character.isJavaIdentifierPart(c))
						break;
					++offset;
				}
				
				int end= offset;
				
				if (start == end)
					return new Region(start, 0);
				else
					return new Region(start + 1, end - start - 1);
				
			} catch (BadLocationException x) {
				return null;
			}
		}
		IRegion getCurrentTextRegion(ISourceViewer viewer) {
			int offset= getCurrentTextOffset(viewer);				
			if (offset == -1)
				return null;
			IJavaElement input= SelectionConverter.getInput(JavaEditor.this);