protected int getCursor(DropTargetEvent event) {
StructuredTextViewer textViewer = editor.getTextEditor().getTextViewer();
return VEXTextEditorHelper.getOffsetAtPoint(textViewer, new Point(event.x, event.y));
}
protected Node getCurrentNode(DropTargetEvent event) {
StructuredTextViewer textViewer = editor.getTextEditor().getTextViewer();
return VEXTextEditorHelper.getNode(textViewer, getCursor(event));
}