Bug 10550 Hilight cursor row (accessibility for the visually impaired)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
private void handleDrawRequest(GC gc) {
				
				if (fBracketPosition.isDeleted)
					return;
					
				int length= fBracketPosition.getLength();
				if (length < 1)
					return;
					
				int offset= fBracketPosition.getOffset();
				IRegion region= fSourceViewer.getVisibleRegion();
				
				if (region.getOffset() <= offset && region.getOffset() + region.getLength() >= offset + length) {
					offset -= region.getOffset();
					if (fMatcher.RIGHT == fAnchor)
						draw(gc, offset, 1);
					else 
						draw(gc, offset + length -1, 1);					
				}
			}
			
			private void draw(GC gc, int offset, int length) {
				if (gc != null) {
					Point left= fTextWidget.getLocationAtOffset(offset);
					Point right= fTextWidget.getLocationAtOffset(offset + length);
					
					gc.setForeground(fColor);
					gc.drawRectangle(left.x, left.y, right.x - left.x - 1, gc.getFontMetrics().getHeight() - 1);