import { CreateElement, VNode } from 'vue';
import { Observable } from 'rxjs';
/**
 * 底部项绘制服务
 *
 * @export
 * @class TopItemsService
 */
export declare class TopItemsService {
    /**
     * 变更脏检查手动触发
     *
     * @private
     * @type {Subject<void>}
     * @memberof TopItemsService
     */
    private tickSubject;
    /**
     * 底部左侧项
     *
     * @memberof TopItemsService
     */
    readonly leftItemsRenders: ((h: CreateElement) => VNode)[];
    /**
     * 底部中间项
     *
     * @memberof TopItemsService
     */
    readonly centerItemsRenders: ((h: CreateElement) => VNode)[];
    /**
     * 底部右侧项
     *
     * @memberof TopItemsService
     */
    readonly rightItemsRenders: ((h: CreateElement) => VNode)[];
    /**
     * 注册左侧项
     *
     * @param {(h: CreateElement) => VNode} fun
     * @param {number} [index] 插入指定位置
     * @returns {{ remove: () => boolean }}
     * @memberof TopItemsService
     */
    registerLeftItem(fun: (h: CreateElement) => VNode, index?: number): {
        remove: () => boolean;
    };
    /**
     * 注册中间项
     *
     * @param {(h: CreateElement) => VNode} fun
     * @param {number} [index] 插入指定位置
     * @returns {{ remove: () => boolean }}
     * @memberof TopItemsService
     */
    registerCenterItem(fun: (h: CreateElement) => VNode, index?: number): {
        remove: () => boolean;
    };
    /**
     * 注册右侧项
     *
     * @param {(h: CreateElement) => VNode} fun
     * @param {number} [index] 插入指定位置
     * @returns {{ remove: () => boolean }}
     * @memberof TopItemsService
     */
    registerRightItem(fun: (h: CreateElement) => VNode, index?: number): {
        remove: () => boolean;
    };
    /**
     * 插入项
     *
     * @protected
     * @param {any[]} items
     * @param {*} fun
     * @param {number} [index]
     * @returns {{ remove: () => boolean }}
     * @memberof TopItemsService
     */
    protected addItem(items: any[], fun: any, index?: number): {
        remove: () => boolean;
    };
    /**
     * 删除指定位置数据
     *
     * @protected
     * @param {any[]} items
     * @param {number} index
     * @returns {boolean}
     * @memberof TopItemsService
     */
    protected remove(items: any[], index: number): boolean;
    /**
     * 手动触发脏检查
     *
     * @memberof TopItemsService
     */
    tick(): void;
    /**
     * 订阅脏检查触发流
     *
     * @returns {Observable<void>}
     * @memberof TopItemsService
     */
    tickTrigger(): Observable<void>;
}
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