export enum FITTING_OPTION {
    HEIGHT = 'full-height',
    WIDTH = 'full-width',
    ORIGINAL = 'original'
  }
  
export enum SPLIT_PAGE_PART {
    NO_SPLIT = 'none',
    LEFT_PART = 'left',
    RIGHT_PART = 'right'
  }
  
export enum PAGING_DIRECTION {
    FORWARD = 1,
    BACKWARDS = -1,
  }
  
export enum COLOR_FILTER {
    NONE = '',
    SEPIA = 'filter-sepia',
    DARK = 'filter-dark'
  }
