import { IPublicTypeDisposable } from '../type';
export interface IPublicModelHistory {
    /**
     * 历史记录跳转到指定位置
     * go to a specific history
     * @param cursor
     */
    go(cursor: number): void;
    /**
     * 历史记录后退
     * go backward in history
     */
    back(): void;
    /**
     * 历史记录前进
     * go forward in history
     */
    forward(): void;
    /**
     * 保存当前状态
     * do save current change as a record in history
     */
    savePoint(): void;
    /**
     * 当前是否是「保存点」，即是否有状态变更但未保存
     * check if there is unsaved change for history
     */
    isSavePoint(): boolean;
    /**
     * 获取 state，判断当前是否为「可回退」、「可前进」的状态
     * get flags in number which indicat current change state
     *
     *  |    1     |     1    |    1     |
     *  | -------- | -------- | -------- |
     *  | modified | redoable | undoable |
     * eg.
     *  7 means : modified && redoable && undoable
     *  5 means : modified && undoable
     */
    getState(): number;
    /**
     * 监听 state 变更事件
     * monitor on stateChange event
     * @param func
     */
    onChangeState(func: () => any): IPublicTypeDisposable;
    /**
     * 监听历史记录游标位置变更事件
     * monitor on cursorChange event
     * @param func
     */
    onChangeCursor(func: () => any): IPublicTypeDisposable;
}