persagy_topo_editer/src/components/editClass/edit/commands/SGraphPointListDelete.ts

/*
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 *      .&888888I                                          Copyright (c) 2016-2020.  博锐尚格科技股份有限公司
 *        ~8888'
 *        .!88~                                                                     All rights reserved.
 *
 * *********************************************************************************************************************
 */

import { SPoint } from "@persagy-web/draw";
import { SGraphCommand, SGraphItem, SGraphScene } from "@persagy-web/graph/";

/**
 * 多边形、折线等相关顶点的位置删除命令
 *
 * @author 韩耀龙 <han_yao_long@163.com>
 */
export class SGraphPointListDelete extends SGraphCommand {
    /** 命令名称 */
    readonly command: string;
    /** 指向 item 对象 */
    item: SGraphItem;
    /** 索引 */
    index: number | null;
    /** 删除位置 */
    pos: SPoint | null;
    /** 顶点数组 */
    pointList: SPoint[];

    /**
     * 构造函数
     *
     * @param scene       item所在场景
     * @param item        指向item对象
     * @param pointList   顶点数组
     * @param pos         删除的点
     * @param index       索引
     */
    constructor(
        scene: SGraphScene,
        item: SGraphItem,
        pointList: SPoint[],
        pos: SPoint,
        index: number | null = null
    ) {
        super(scene);
        this.item = item;
        this.index = index;
        this.pointList = pointList;
        this.pos = pos;
        this.command = "SGraphPointListDelete";
        this.desc = `删除折点=${item.id}`;
    }

    /**
     * 执行重做操作执行
     */
    redo(): void {
        if (this.index == null) {
            this.pointList.pop();
        } else {
            this.pointList.splice(this.index, 1);
        }

        this.item.update();
    }

    /**
     * 执行取消操作执行
     */
    undo(): void {
        if (this.pos == null) return;

        if (this.index == null) {
            this.pointList.push(this.pos);
        } else {
            this.pointList.splice(this.index, 0, this.pos);
        }

        this.item.update();
    }

    /**
     * 命令细节描述
     *
     * @return 字符串类型数据
     */
    toString(): string {
        const pointList = `pointList=${JSON.stringify(this.pointList)}`;
        const pos = `pos=${JSON.stringify(this.pos)}`;
        const index = `index=${this.index}`;
        return `${index};\n${pos};\n${pointList}`;
    }
}