public ContentAssistInvocationContext(ITextViewer viewer, int offset) { Assert.isNotNull(viewer); fViewer= viewer; fDocument= null; fOffset= offset;
public ContentAssistInvocationContext(ITextViewer viewer) { this(viewer, viewer.getSelectedRange().x);
	public ContentAssistInvocationContext(ITextViewer viewer, int offset) {		Assert.isNotNull(viewer);		fViewer= viewer;		fDocument= null;		fOffset= offset;	}