persagy_topo_editer/src/components/editClass/edit/commands/SGraphPropertyCommand.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 { SGraphCommand } from "./SGraphCommand";
import { SGraphItem } from "@persagy-web/graph/";
import { SGraphScene } from "@persagy-web/graph/";

/**
 * 属性修改命令类
 *
 * @author 韩耀龙 <han_yao_long@163.com>
 */
export class SGraphPropertyCommand<T> extends SGraphCommand {
    /** 命令名称 */
    readonly command: string;
    /**	指向 item 对象 */
    item: SGraphItem;
    /** 属性名称 */
    propName: string;
    /** 属性旧值 */
    oldProp: T;
    /** 属性新值 */
    newProp: T;

    /**
     * 构造函数
     *
     * @param scene       命令所属的场景类
     * @param item        命令所属的 item 类
     * @param propName    修改的属性名称
     * @param oldProp     修改前的属性值
     * @param newProp     修改后的属性值
     */
    constructor(
        scene: SGraphScene,
        item: SGraphItem,
        propName: string,
        oldProp: T,
        newProp: T
    ) {
        super(scene);
        this.item = item;
        this.propName = propName;
        this.oldProp = oldProp;
        this.newProp = newProp;
        this.command = "SGraphPropertyCommand";
        this.command = `更新属性=${item.id}`;
    }

    /**
     * redo 操作
     */
    redo(): void {
        // @ts-ignore
        this.item[this.propName] = this.newProp;
        this.item.update();
    }

    /**
     * undo 操作
     */
    undo(): void {
        // @ts-ignore
        this.item[this.propName] = this.oldProp;
        this.item.update();
    }

    /**
     * 命令细节描述
     *
     * @return 字符串型数据
     */
    toString(): string {
        const propName = `propName=${this.propName}`;
        const oldProp = `oldProp=${JSON.stringify(this.oldProp)}`;
        const newProp = `newProp=${JSON.stringify(this.newProp)}`;
        return `${propName};\n${oldProp};\n${newProp}`;
    }
}