mxConstants.DIRECTION_MASK_WEST;break;case 2:b|=mxConstants.DIRECTION_MASK_NORTH;break;case 3:b|=mxConstants.DIRECTION_MASK_EAST}if(0<=d.indexOf(mxConstants.DIRECTION_EAST))switch(a){case 0:b|=mxConstants.DIRECTION_MASK_EAST;break;case 1:b|=mxConstants.DIRECTION_MASK_SOUTH;break;case 2:b|=mxConstants.DIRECTION_MASK_WEST;break;case 3:b|=mxConstants.DIRECTION_MASK_NORTH}return b},reversePortConstraints:function(a){var b=(a&mxConstants.DIRECTION_MASK_WEST)<<3;b|=(a&mxConstants.DIRECTION_MASK_NORTH)<<