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/**
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* @description 记录 range 变化
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* @author fangzhicong
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*/
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import Cache from '../../../../utils/data-structure/cache';
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import Editor from '../../../index';
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import { RangeItem } from '../type';
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/**
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* 编辑区 range 缓存管理器
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*/
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export default class RangeCache extends Cache<[RangeItem, RangeItem]> {
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editor: Editor;
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/**
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* 变化前的 Range 数据
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*/
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private lastRange;
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/**
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* 有效选区的根节点
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*/
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private root;
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updateLastRange: Function;
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constructor(editor: Editor);
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/**
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* 获取 Range 对象
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*/
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get rangeHandle(): Range;
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/**
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* 初始化绑定
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*/
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observe(): void;
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/**
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* 保存 Range
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*/
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save(): this;
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/**
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* 设置 Range，在 撤销/恢复 中调用
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* @param range 缓存的 Range 数据
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*/
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set(range: RangeItem | undefined): boolean;
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/**
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* 撤销
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*/
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revoke(): boolean;
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/**
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* 恢复
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*/
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restore(): boolean;
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}
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