mdw-hub/web/js/util.js
function(input) {
      var dollarCurly = input.indexOf('${');
      if (dollarCurly >= 0) {
        var endCurly = input.indexOf('}', dollarCurly);
        if (endCurly >= 0) {
          return { start: dollarCurly, stop: endCurly, expr: input.substring(dollarCurly + 2, endCurly) };
        }
      }
      return null;
    }
function(input) {
      var dollarCurly = input.indexOf('${');
      if (dollarCurly >= 0) {
        var endCurly = input.indexOf('}', dollarCurly);
        if (endCurly >= 0) {
          return { start: dollarCurly, stop: endCurly, expr: input.substring(dollarCurly + 2, endCurly) };
        }
      }
      return null;
    }
gets expression coordinates