@supermap/iclient-maplibregl/overlay/symbol/CompositeSymbolRender.js

@supermap/iclient-maplibregl 是一套基于 Maplibre GL 的云 GIS 网络客户端开发平台， 支持访问 SuperMap iServer / iEdge / iPortal / iManager / Online 的地图、服务和资源，为用户提供了完整专业的 GIS 能力， 同时提供了优秀的可视化功能。

/* Copyright© 2000 - 2023 SuperMap Software Co.Ltd. All rights reserved.
 * This program are made available under the terms of the Apache License, Version 2.0
 * which accompanies this distribution and is available at http://www.apache.org/licenses/LICENSE-2.0.html.*/
import { Util } from "@supermap/iclient-common/commontypes/Util";
import SingleSymbolRender from "./SingleSymbolRender";

/**
 * 符号图层管理器
 * @returns {Object}
 * @private
 */
class CompositeSymbolRender {
    constructor(map) {
        this.map = map;
        this.singleSymbol = new SingleSymbolRender(map);
        this.layerIds = {};
    }

    /**
     * 符号转换成图层
     * @param {*} layer
     * @param {*} before
     */
    addLayer(layer, symbol, before) {
        symbol.forEach((style) => {
            const id = Util.createUniqueID(`${layer.id}_compositeLayer_`);
            this.singleSymbol.addLayer({ ...layer, id }, style, before);
            this.addLayerId(layer.id, id);
        })
    }

    /**
     * 添加图层
     * @param {string} id
     * @param {string} childId
     */
    addLayerId(id, childId) {
        if (!this.layerIds[id]) {
            this.layerIds[id] = [];
        }
        !this.layerIds[id].includes(childId) && this.layerIds[id].push(childId);
    }

    /**
     * 删除图层
     * @param {string} id
     */
    removeLayerId(id) {
        delete this.layerIds[id];
    }

    /**
     * 获取图层
     * @param {string} id
     * @returns {Array}
     */
    getLayerIds(id) {
        return this.layerIds[id];
    }

    /**
     * 获取组合图层ID
     * @param {string} childId
     * @returns {string}
     */
    getLayerId(childId) {
        for (const id in this.layerIds) {
            if (this.layerIds[id].find(i => i === childId)) {
                return id;
            }
        }
    }
}

export default CompositeSymbolRender;