sagacloud-web/saga-web-graph/src/commands/SGraphPointListDelete.ts

/*
 * ********************************************************************************************************************
 *
 *                      :*$@@%$*:                         ;:                ;;    ;;
 *                    :@@%!  :!@@%:                       %!             ;%%@@%$ =@@@@@@@%;     @%@@@%%%%@@@@@
 *                   :@%;       :$=                       %%$$$%$$         ;$$  ;$@=   !@$
 *                   =@!                                  %!              @ $=;%   !@@@%:      !$$$$$$$$$$$$$$=
 *                   =@*                                  %!              @ $= % %@=   =%@!      %=
 *              *$%%! @@=        ;=$%%%$*:                %!              @ $= % =%%%%%%@$      *%:         =%
 *            %@@!:    !@@@%=$@@@@%!  :*@@$:              %!              @ $= % $*     ;@      @*          :%*
 *          ;@@!          ;!!!;:         ;@%:      =======@%========*     @ $$ % $%*****$@     :@$=*********=@$
 *          $@*   ;@@@%=!:                *@*
 *          =@$    ;;;!=%@@@@=!           =@!
 *           %@$:      =@%: :*@@@*       %@=                    Copyright (c) 2016-2019.  北京上格云技术有限公司
 *            ;%@@$=$@@%*       *@@@$=%@@%;
 *               ::;::             ::;::                                              All rights reserved.
 *
 * ********************************************************************************************************************
 */

import { SPoint } from "@saga-web/draw/lib";
import { SGraphCommand, SGraphItem, SGraphScene } from "../index";

/**
 * 多边形、折线等相关顶点的位置删除命令
 *
 * @author  韩耀龙
 */

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}`;
    } // Constructor

    /**
     * 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();
    } // Function redo()

    /**
     * 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();
    } // Function undo()

    /**
     * 命令细节描述
     *
     * */
    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}`;
    } // Function toString()
} // Class SGraphPointListDelete