code: function(current) {
          return current ?
              new $.Rect(
                  this._xSpring.current.value,
                  this._ySpring.current.value,
                  this._worldWidthCurrent,
                  this._worldHeightCurrent) :
              new $.Rect(
                  this._xSpring.target.value,
                  this._ySpring.target.value,
                  this._worldWidthTarget,
                  this._worldHeightTarget);
      }
docs: Get this TiledImage's bounds in viewport coordinates without taking
  rotation into account.
  @param {Boolean} [current=false] - Pass true for the current location;
  false for target location.
  @returns {OpenSeadragon.Rect} This TiledImage's bounds in viewport coordinates.