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Util.js
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/* Copyright© 2000 - 2021 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 mapboxgl from "mapbox-gl";
import "../core/Base";
import { Bounds, GeometryPoint, Polygon, LinearRing, GeoJSON as GeoJSONFormat } from "@supermap/iclient-common";
/**
* @class mapboxgl.supermap.Util
* @category BaseTypes Util
* @classdesc 工具类。
*/
export class Util {
/**
* @function mapboxgl.supermap.Util.toSuperMapGeometry
* @description 将 GeoJSON 对象转为 SuperMap 几何图形。
* @param {GeoJSONObject} geoJSON - GeoJSON 对象。
* @returns {SuperMap.Geometry}
*/
static toSuperMapGeometry(geoJSON) {
if (geoJSON && geoJSON.type) {
var format = new GeoJSONFormat();
var result = format.read(geoJSON, "FeatureCollection");
return result[0].geometry;
}
}
static toSuperMapBounds(bounds) {
if (this.isArray(bounds)) {
//左下右上
return new Bounds(bounds[0], bounds[1], bounds[2], bounds[3]);
}
return new Bounds(bounds.getWest(), bounds.getSouth(), bounds.getEast(), bounds.getNorth());
}
static toSuperMapPoint(lnglat) {
//客户端可传入 geojson 对象 或者 mapboxgl lnglat 点对象,或者是点数组
if (this.isArray(lnglat)) {
return new GeometryPoint(lnglat[0], lnglat[1]);
} else if (lnglat.lng && lnglat.lat) {
return new GeometryPoint(lnglat.lng, lnglat.lat);
}
return new GeometryPoint(lnglat.geometry.coordinates[0], lnglat.geometry.coordinates[1]);
}
/**
* @function mapboxgl.supermap.Util.toSuperMapPolygon
* @description 将 Mapbox GL LngLatbounds 对象转为 SuperMap 几何图形。
* @param {Mapboxgl.LngLatBounds} lnglatBounds - Mapbox GL LngLatbounds对象。
* @returns {SuperMap.Geometry.Polygon}
*/
static toSuperMapPolygon(lnglatBounds) {
const west = lnglatBounds.getWest();
const east = lnglatBounds.getEast();
const sourth = lnglatBounds.getSouth();
const north = lnglatBounds.getNorth();
return new Polygon([
new LinearRing([
new GeometryPoint(west, sourth),
new GeometryPoint(east, sourth),
new GeometryPoint(east, north),
new GeometryPoint(west, north)
])
]);
}
/**
* @function mapboxgl.supermap.Util.isArray
* @description 判断是否为数组格式。
* @param {Object} obj - 待判断对象。
* @returns {boolean} 是否是数组。
*/
static isArray(obj) {
return Object.prototype.toString.call(obj) == "[object Array]";
}
/**
* @function mapboxgl.supermap.Util.toGeoJSON
* @description 将传入对象转为 GeoJSON 格式。
* @param {Object} smObj - 待转参数。
*/
static toGeoJSON(smObj) {
if (smObj) {
var format = new GeoJSONFormat();
return format.toGeoJSON(smObj);
}
}
/**
* @function mapboxgl.supermap.Util.toProcessingParam
* @description 将 Region 节点数组转为 Processing 服务需要的分析参数。
* @param {Array} points - Region 各个节点数组。
* @returns {Object} processing 服务裁剪、查询分析的分析参数。
*/
static toProcessingParam(points) {
var geometryParam = {};
if (points.length < 1) {
geometryParam = "";
} else {
var results = [];
for (var i = 0; i < points.length; i++) {
var point = {};
point.x = points[i][0];
point.y = points[i][1];
results.push(point);
}
geometryParam.type = "REGION";
geometryParam.points = results;
}
return geometryParam;
}
/**
* @function mapboxgl.supermap.Util.extend
* @description 对象拷贝赋值。
* @param {Object} dest - 目标对象。
* @param {Object} arguments - 待拷贝的对象。
* @returns {Object} 赋值后的目标对象。
*/
static extend(dest) {
for (var index = 0; index < Object.getOwnPropertyNames(arguments).length; index++) {
var arg = Object.getOwnPropertyNames(arguments)[index];
if (arg == "caller" || arg == "callee" || arg == "length" || arg == "arguments") {
continue;
}
var obj = arguments[arg];
if (obj) {
for (var j = 0; j < Object.getOwnPropertyNames(obj).length; j++) {
var key = Object.getOwnPropertyNames(obj)[j];
if (arg == "caller" || arg == "callee" || arg == "length" || arg == "arguments") {
continue;
}
dest[key] = obj[key];
}
}
}
return dest;
}
/**
* 检测数据是否为number
* @param value 值，未知数据类型
* @returns {boolean}
*/
static isNumber(value) {
if (value === "") {
return false;
}
let mdata = Number(value);
if (mdata === 0) {
return true;
}
return !isNaN(mdata);
}
static isString(str) {
return (typeof str === 'string') && str.constructor === String;
}
/**
* 随机生成id
* @param attr
* @returns {string}
*/
static newGuid(attr) {
let len = attr || 32;
let guid = "";
for (let i = 1; i < len; i++) {
let n = Math.floor(Math.random() * 16.0).toString(16);
guid += n;
}
return guid;
}
/**
* @description 十六进制转 RGBA 格式。
* @param {Object} hex - 十六进制格式参数。
* @param {number} opacity -Alpha 参数。
* @returns {string} 生成的 RGBA 格式。
*/
static hexToRgba(hex, opacity) {
var color = [],
rgba = [];
hex = hex.replace(/#/, "");
if (hex.length == 3) {
var tmp = [];
for (let i = 0; i < 3; i++) {
tmp.push(hex.charAt(i) + hex.charAt(i));
}
hex = tmp.join("");
}
for (let i = 0; i < 6; i += 2) {
color[i] = "0x" + hex.substr(i, 2);
rgba.push(parseInt(Number(color[i])));
}
rgba.push(opacity);
return "rgba(" + rgba.join(",") + ")";
}
/**
* @param {string} featureName 原始数据中的地名
* @param {string} fieldName 需要匹配的地名
* @returns {boolean} 是否匹配
*/
static isMatchAdministrativeName(featureName, fieldName) {
if (this.isString(fieldName)) {
let shortName = featureName.substr(0, 2);
// 张家口市和张家界市 特殊处理
if (shortName === '张家') {
shortName = featureName.substr(0, 3);
}
return !!fieldName.match(new RegExp(shortName));
}
return false;
}
}
mapboxgl.supermap.Util = Util;