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history.ts
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81 lines (70 loc) · 1.7 KB
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import type {
IDocumentModel as InnerDocumentModel,
IHistory as InnerHistory,
} from '@felce/lowcode-designer';
import { historySymbol, documentSymbol } from '../symbols';
import { IPublicModelHistory, IPublicTypeDisposable } from '@felce/lowcode-types';
export class History implements IPublicModelHistory {
private readonly [documentSymbol]: InnerDocumentModel;
private get [historySymbol](): InnerHistory {
return this[documentSymbol].getHistory();
}
constructor(document: InnerDocumentModel) {
this[documentSymbol] = document;
}
/**
* 历史记录跳转到指定位置
* @param cursor
*/
go(cursor: number): void {
this[historySymbol].go(cursor);
}
/**
* 历史记录后退
*/
back(): void {
this[historySymbol].back();
}
/**
* 历史记录前进
*/
forward(): void {
this[historySymbol].forward();
}
/**
* 保存当前状态
*/
savePoint(): void {
this[historySymbol].savePoint();
}
/**
* 当前是否是「保存点」，即是否有状态变更但未保存
* @returns
*/
isSavePoint(): boolean {
return this[historySymbol].isSavePoint();
}
/**
* 获取 state，判断当前是否为「可回退」、「可前进」的状态
* @returns
*/
getState(): number {
return this[historySymbol].getState();
}
/**
* 监听 state 变更事件
* @param func
* @returns
*/
onChangeState(func: () => any): IPublicTypeDisposable {
return this[historySymbol].onChangeState(func);
}
/**
* 监听历史记录游标位置变更事件
* @param func
* @returns
*/
onChangeCursor(func: () => any): IPublicTypeDisposable {
return this[historySymbol].onChangeCursor(func);
}
}