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1982 lines (1885 loc) · 57.4 KB
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/* Copyright© 2000 - 2024 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 { Util as CommonUtil } from '@supermapgis/iclient-common/commontypes/Util';
import { StringExt } from '@supermapgis/iclient-common/commontypes/BaseTypes';
import { FetchRequest } from '@supermapgis/iclient-common/util/FetchRequest';
import { ArrayStatistic } from '@supermapgis/iclient-common/util/ArrayStatistic';
import { ColorsPickerUtil } from '@supermapgis/iclient-common/util/ColorsPickerUtil';
import { QueryOption } from '@supermapgis/iclient-common/REST';
import { GetFeaturesBySQLParameters } from '@supermapgis/iclient-common/iServer/GetFeaturesBySQLParameters';
import { GetFeaturesBySQLService } from '@supermapgis/iclient-common/iServer/GetFeaturesBySQLService';
import { QueryBySQLParameters } from '@supermapgis/iclient-common/iServer/QueryBySQLParameters';
import { FilterParameter } from '@supermapgis/iclient-common/iServer/FilterParameter';
import { Lang } from '@supermapgis/iclient-common/lang/Lang';
import { parseCondition, parseConditionFeature } from '@supermapgis/iclient-common/util/FilterCondition';
import { Util } from '../../../core/Util';
import { QueryService } from '../../../services/QueryService';
import Canvg from 'canvg';
import { XMLParser } from "fast-xml-parser";
const MB_SCALEDENOMINATOR_3857 = [
'559082264.0287178',
'279541132.0143589',
'139770566.0071794',
'69885283.00358972',
'34942641.50179486',
'17471320.75089743',
'8735660.375448715',
'4367830.1877224357',
'2183915.093862179',
'1091957.546931089',
'545978.7734655447',
'272989.7734655447',
'272989.3867327723',
'136494.6933663862',
'68247.34668319309',
'34123.67334159654',
'17061.83667079827',
'8530.918335399136',
'4265.459167699568',
'2132.729583849784'
];
const MB_SCALEDENOMINATOR_4326 = [
'5.590822640287176E8',
'2.795411320143588E8',
'1.397705660071794E8',
'6.98852830035897E7',
'3.494264150179485E7',
'1.7471320750897426E7',
'8735660.375448713',
'4367830.187724357',
'2183915.0938621783',
'1091957.5469310891',
'545978.7734655446',
'272989.3867327723',
'136494.69336638614',
'68247.34668319307',
'34123.673341596535',
'17061.836670798268',
'8530.918335399134'
];
const DEFAULT_WELLKNOWNSCALESET = ['GoogleCRS84Quad', 'GoogleMapsCompatible'];
export class WebMap extends mapboxgl.Evented {
constructor(mapId, options, mapOptions = {}) {
super();
this.mapId = mapId;
this.server = options.server;
this.withCredentials = options.withCredentials;
this.target = options.target;
this.mapOptions = mapOptions;
this._canvgsV = [];
}
/**
* @function WebMap.prototype.initializeMap
* @description 登陆窗口后添加地图图层。
* @param {Object} mapInfo - map 信息。
*/
initializeMap(mapInfo) {
const projectionMap = ['EPSG:4490', 'EPSG:4214', 'EPSG:4610', 'EPSG:3857', 'EPSG:4326'];
// 坐标系异常处理
if (!projectionMap.find(item => item === mapInfo.projection)) {
throw Error(Lang.i18n('msg_crsunsupport'));
}
this.baseProjection = mapInfo.projection;
//存储地图的名称以及描述等信息，返回给用户
this.mapParams = {
title: mapInfo.title,
description: mapInfo.description
};
this._createMap(mapInfo);
let layers = mapInfo.layers;
this.map.on('load', () => {
this._addBaseMap(mapInfo);
if (!layers || layers.length === 0) {
this._sendMapToUser(0, 0);
} else {
this._addLayers(layers);
}
});
this.map.on('remove', () => {
this._stopCanvg();
});
}
/**
* @private
* @function WebMap.prototype._createMap
* @description 创建地图。
*/
_createMap(mapInfo) {
// 获取字体样式
let fonts = [];
let layers = mapInfo.layers;
// 获取 label 图层字体类型
if (layers && layers.length > 0) {
layers.forEach(layer => {
layer.labelStyle && fonts.push(layer.labelStyle.fontFamily);
}, this);
}
fonts.push("supermapol-icons");
let fontFamilys = fonts.join(',');
// zoom center
let oldcenter = mapInfo.center,
zoom = mapInfo.level || 0,
center,
zoomBase = 0;
// zoom = zoom === 0 ? 0 : zoom - 1;
if (mapInfo.minScale && mapInfo.maxScale) {
zoomBase = this._transformScaleToZoom(mapInfo.minScale, mapboxgl.CRS ? mapboxgl.CRS.get(this.baseProjection):'EPSG:3857');
} else {
const e =
this._getResolution(
mapboxgl.CRS
? mapboxgl.CRS.get(this.baseProjection).getExtent()
: [-20037508.3427892, -20037508.3427892, 20037508.3427892, 20037508.3427892]
) / this._getResolution(mapInfo.extent);
zoomBase = +Math.log(e) / Math.LN2.toFixed(2);
}
zoom += zoomBase;
center = oldcenter ? Util.unproject([oldcenter.x, oldcenter.y]) : new mapboxgl.LngLat(0, 0);
// 初始化 map
this.map = new mapboxgl.Map({
container: this.target,
center: this.mapOptions.center || center,
zoom: this.mapOptions.zoom || zoom,
bearing: this.mapOptions.bearing || 0,
pitch: this.mapOptions.pitch || 0,
style: {
version: 8,
sources: {},
// "glyphs": 'https://iclient.supermap.io/iserver/services/map-beijing/rest/maps/beijingMap/tileFeature/sdffonts/{fontstack}/{range}.pbf',
layers: []
},
crs: this.baseProjection,
localIdeographFontFamily: fontFamilys || ''
});
this.fire('mapinitialized');
}
/**
* @private
* @function WebMap.prototype._addBaseMap
* @description 添加底图。
* @param {Object} mapInfo - map 信息。
*/
_addBaseMap(mapInfo) {
this._createBaseLayer(mapInfo);
}
/**
* @private
* @function WebMap.prototype._createBaseLayer
* @description 创建底图。
* @param {Object} mapInfo - map 信息。
*/
_createBaseLayer(mapInfo) {
let layerInfo = mapInfo.baseLayer || mapInfo;
let layerType = layerInfo.layerType; //底图和rest地图兼容
if (
layerType.indexOf('TIANDITU_VEC') > -1 ||
layerType.indexOf('TIANDITU_IMG') > -1 ||
layerType.indexOf('TIANDITU_TER') > -1
) {
layerType = layerType.substr(0, 12);
}
let mapUrls = {
CLOUD: 'http://t2.dituhui.com/FileService/image?map=quanguo&type=web&x={x}&y={y}&z={z}',
CLOUD_BLACK: 'http://t3.dituhui.com/MapService/getGdp?x={x}&y={y}&z={z}',
OSM: 'http://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png',
GOOGLE:
'https://www.google.cn/maps/vt/pb=!1m4!1m3!1i{z}!2i{x}!3i{y}!2m3!1e0!2sm!3i380072576!3m8!2szh-CN!3scn!5e1105!12m4!1e68!2m2!1sset!2sRoadmap!4e0!5m1!1e0',
GOOGLE_CN: 'https://mt{0-3}.google.cn/vt/lyrs=m&hl=zh-CN&gl=cn&x={x}&y={y}&z={z}',
JAPAN_STD: 'https://cyberjapandata.gsi.go.jp/xyz/std/{z}/{x}/{y}.png',
JAPAN_PALE: 'https://cyberjapandata.gsi.go.jp/xyz/pale/{z}/{x}/{y}.png',
JAPAN_RELIEF: 'https://cyberjapandata.gsi.go.jp/xyz/relief/{z}/{x}/{y}.png',
JAPAN_ORT: 'https://cyberjapandata.gsi.go.jp/xyz/ort/{z}/{x}/{y}.jpg'
},
url;
switch (layerType) {
case 'TIANDITU_VEC':
case 'TIANDITU_IMG':
case 'TIANDITU_TER':
this._createTiandituLayer(mapInfo);
break;
case 'BING':
this._createBingLayer(layerInfo.name);
break;
case 'WMS':
this._createWMSLayer(layerInfo);
break;
case 'WMTS':
this._createWMTSLayer(layerInfo);
break;
case 'TILE':
case 'SUPERMAP_REST':
this._createDynamicTiledLayer(layerInfo);
break;
case 'CLOUD':
case 'CLOUD_BLACK':
case 'OSM':
case 'JAPAN_ORT':
case 'JAPAN_RELIEF':
case 'JAPAN_PALE':
case 'JAPAN_STD':
case 'GOOGLE_CN':
case 'GOOGLE':
url = mapUrls[layerType];
this._createXYZLayer(layerInfo, url);
break;
case 'MAPBOXSTYLE':
this._createMapboxStyle(layerInfo);
break;
default:
break;
}
}
/**
* @private
* @function WebMap.prototype._createMapboxStyle
* @description 创建 Mapbox 样式。
* @param {Object} mapInfo - map 信息。
*/
_createMapboxStyle(mapInfo) {
let _this = this,
{ dataSource = {} } = mapInfo,
{ serverId, url } = dataSource,
styleUrl;
styleUrl = serverId !== undefined ? `${this.server}web/datas/${serverId}/download` : url;
FetchRequest.get(styleUrl, null, {
withCredentials: this.withCredentials,
withoutFormatSuffix: true,
headers: {
'Content-Type': 'application/json;chartset=uft-8'
}
}).then(response => {
return response.json();
}).then(style => {
_this._matchStyleObject(style);
_this.map.setStyle(style);
})
}
/**
* @private
* @function WebMap.prototype._matchStyleObject
* @description 恢复 style 为标准格式。
* @param {Object} style - mapbox 样式。
*/
_matchStyleObject(style) {
let { sprite, glyphs } = style;
if (sprite && typeof sprite === 'object'){
style.sprite = Object.values(sprite)[0];
}
if (glyphs && typeof glyphs === 'object'){
style.glyphs = Object.values(glyphs)[0];
}
}
/**
* @private
* @function WebMap.prototype._createTiandituLayer
* @description 创建天地图底图。
* @param {Object} mapInfo - map 信息。
*/
_createTiandituLayer(mapInfo) {
let tiandituUrls = this._getTiandituUrl(mapInfo);
let layerType = mapInfo.baseLayer.layerType;
let isLabel = Boolean(mapInfo.baseLayer.labelLayerVisible);
let labelUrl = tiandituUrls['labelUrl'];
let tiandituUrl = tiandituUrls['tiandituUrl'];
this._addBaselayer(tiandituUrl, 'tianditu-layers-' + layerType);
isLabel && this._addBaselayer(labelUrl, 'tianditu-label-layers-' + layerType);
}
/**
* @private
* @function WebMap.prototype._createWMTSLayer
* @description 创建 WMTS 底图。
* @param {Object} mapInfo - map 信息。
*/
_createWMTSLayer(layerInfo) {
let wmtsUrl = this._getWMTSUrl(layerInfo);
this._filterWMTSIsMatched(layerInfo, (isMatched, matchMaxZoom) => {
isMatched && this._addBaselayer([wmtsUrl], 'wmts-layers' + layerInfo.name, 0, matchMaxZoom);
});
}
/**
* @private
* @function WebMap.prototype._filterWMTSIsMatched
* @description 过滤能够跟mapboxgl匹配的wmts服务。
* @param {Object} mapInfo - map 信息。
* @callback matchedCallback
*/
_filterWMTSIsMatched(mapInfo, matchedCallback) {
let isMatched = false,
matchMaxZoom = 22,
url = mapInfo.url;
let options = {
withCredentials: false,
withoutFormatSuffix: true
};
FetchRequest.get(url, null, options)
.then(response => {
return response.text();
})
.then(capabilitiesText => {
const parser = new XMLParser({numberParseOptions:{hex : false, leadingZeros: false,eNotation: false},alwaysCreateTextNode: true, textNodeName: "_text"});
let tileMatrixSet = parser.parse(capabilitiesText)
.Capabilities.Contents.TileMatrixSet;
if (!Array.isArray(tileMatrixSet)) {
tileMatrixSet = [tileMatrixSet];
}
for (let i = 0; i < tileMatrixSet.length; i++) {
if (
tileMatrixSet[i]['ows:Identifier'] &&
(tileMatrixSet[i]['ows:Identifier']['_text'] + '') === mapInfo.tileMatrixSet
) {
if (DEFAULT_WELLKNOWNSCALESET.indexOf(tileMatrixSet[i]['WellKnownScaleSet']['_text']) > -1) {
isMatched = true;
} else if (
tileMatrixSet[i]['WellKnownScaleSet'] &&
tileMatrixSet[i]['WellKnownScaleSet']['_text'] === 'Custom'
) {
let matchedScaleDenominator = [];
//坐标系判断
let defaultCRSScaleDenominators =
this.map.crs === 'EPSG:3857' ? MB_SCALEDENOMINATOR_3857 : MB_SCALEDENOMINATOR_4326;
for (let j = 0, len = defaultCRSScaleDenominators.length; j < len; j++) {
if (!tileMatrixSet[i].TileMatrix[j]) {
break;
}
if (
defaultCRSScaleDenominators[j] !==
(tileMatrixSet[i].TileMatrix[j]['ScaleDenominator']['_text'] + '')
) {
break;
}
matchedScaleDenominator.push(defaultCRSScaleDenominators[j]);
}
matchMaxZoom = matchedScaleDenominator.length - 1;
if (matchedScaleDenominator.length !== 0) {
isMatched = true;
} else {
throw Error(Lang.i18n('msg_tilematrixsetunsupport'));
}
} else {
throw Error(Lang.i18n('msg_tilematrixsetunsupport'));
}
}
}
matchedCallback(isMatched, matchMaxZoom);
})
.catch(error => {
/**
* @event WebMap#getwmtsfailed
* @description 获取 WMTS 图层信息失败。
* @property {Object} error - 失败原因。
* @property {mapboxgl.Map} map - MapBoxGL Map 对象。
*/
this.fire('getwmtsfailed', { error: error, map: this.map });
});
}
/**
* @private
* @function WebMap.prototype._createBingLayer
* @description 创建 Bing 图层。
*/
_createBingLayer(layerName) {
let bingUrl =
'https://dynamic.t0.tiles.ditu.live.com/comp/ch/{quadkey}?it=G,TW,L,LA&mkt=zh-cn&og=109&cstl=w4c&ur=CN&n=z';
this.addLayer([bingUrl], 'bing-layers-' + layerName);
}
/**
* @private
* @function WebMap.prototype._createXYZLayer
* @description 创建 XYZ 底图。
* @param {string} url - url 地址。
*/
_createXYZLayer(layerInfo, url) {
let urlArr = [];
if (layerInfo.layerType === 'OSM') {
let res = url.match(/\w\-\w/g)[0];
let start = res[0];
let end = res[2];
let alphabet = '';
for (let i = 97; i < 123; i++) {
alphabet += String.fromCharCode(i);
}
let alphabetArr = alphabet.split('');
let startIndex = alphabetArr.indexOf(start);
let endIndex = alphabetArr.indexOf(end);
let res3 = alphabetArr.slice(startIndex, endIndex + 1);
for (let i = 0; i < res3.length; i++) {
let replaceRes = url.replace(/{\w\-\w}/g, res3[i]);
urlArr.push(replaceRes);
}
} else if (layerInfo.layerType === 'GOOGLE_CN') {
let res = url.match(/\d\-\d/g)[0];
let start = res[0];
let end = res[2];
for (let i = start; i <= end; i++) {
let replaceRes = url.replace(/{\d\-\d}/g, i);
urlArr.push(replaceRes);
}
} else {
urlArr = [url];
}
this._addBaselayer(urlArr, 'XYZ-layers-' + layerInfo.name);
}
/**
* @private
* @function WebMap.prototype._createDynamicTiledLayer
* @description 创建 iserver 底图。
* @param {Object} layerInfo - 图层信息。
*/
_createDynamicTiledLayer(layerInfo) {
let url = layerInfo.url;
const layerId = layerInfo.layerID || layerInfo.name;
const { minzoom, maxzoom } = layerInfo;
this._addBaselayer([url], layerId, minzoom, maxzoom, true);
}
/**
* @private
* @function WebMap.prototype._createWMSLayer
* @description 创建 WMS 图层。
* @param {Object} mapInfo - map 信息。
*/
_createWMSLayer(layerInfo) {
let WMSUrl = this._getWMSUrl(layerInfo);
this._addBaselayer([WMSUrl], 'WMS-layers-' + layerInfo.name);
}
/**
* @private
* @function WebMap.prototype._createVectorLayer
* @description 创建 Vector 图层。
* @param {Object} layerInfo - map 信息。
* @param {Array} features - 属性 信息。
*/
_createVectorLayer(layerInfo, features) {
let style = layerInfo.style;
let type = layerInfo.featureType;
let layerID = layerInfo.layerID;
let visible = layerInfo.visible;
let layerStyle = {};
layerStyle.style = this._transformStyleToMapBoxGl(style, type);
layerStyle.layout = { visibility: visible };
let source = {
type: 'geojson',
data: {
type: 'FeatureCollection',
features: features
}
};
this._addOverlayToMap(type, source, layerID, layerStyle);
// 如果面有边框
type === 'POLYGON' &&
style.strokeColor &&
this._addStrokeLineForPoly(style, source, layerID + '-strokeLine', visible);
}
/**
* @function WebMap.prototype._getTiandituUrl
* @private
* @description 创建天地图url;
* @param {Object} mapInfo - map 信息。
*/
_getTiandituUrl(mapInfo) {
let re = /t0/gi;
let tiandituUrls = {};
let layerType = mapInfo.baseLayer.layerType.split('_')[1].toLowerCase();
let isLabel = Boolean(mapInfo.baseLayer.labelLayerVisible);
// let isLabel = true;
let url = 'https://t0.tianditu.gov.cn/{layer}_{proj}/wmts?';
let labelUrl = url;
let layerLabelMap = {
vec: 'cva',
ter: 'cta',
img: 'cia'
};
let tilematrixSet = this.baseProjection === 'EPSG:4326' ? 'c' : 'w';
let options = {
service: 'WMTS',
request: 'GetTile',
style: 'default',
version: '1.0.0',
layer: layerType,
tilematrixSet: tilematrixSet,
format: 'tiles',
width: 256,
height: 256
};
url += this._getParamString(options, url) + '&tilematrix={z}&tilerow={y}&tilecol={x}';
let tiandituUrl = url.replace('{layer}', layerType).replace('{proj}', tilematrixSet);
let tiandituUrlArr = [];
for (let i = 0; i < 8; i++) {
tiandituUrlArr.push(tiandituUrl.replace(re, `t${i}`));
}
tiandituUrls['tiandituUrl'] = tiandituUrlArr;
// 如果有 label 图层
if (isLabel) {
let labelLayer = layerLabelMap[layerType];
options.layer = labelLayer;
labelUrl += this._getParamString(options, labelUrl) + '&tilematrix={z}&tilerow={y}&tilecol={x}';
labelUrl = labelUrl.replace('{layer}', labelLayer).replace('{proj}', tilematrixSet);
let labelUrlArr = [];
for (let i = 0; i < 8; i++) {
labelUrlArr.push(labelUrl.replace(re, `t${i}`));
}
tiandituUrls['labelUrl'] = labelUrlArr;
}
return tiandituUrls;
}
/**
* @function WebMap.prototype._getWMSUrl
* @private
* @description 创建 WMS url;
* @param {Object} mapInfo - map 信息。
*/
_getWMSUrl(mapInfo) {
let url = mapInfo.url;
url = url.split('?')[0];
let strArr = url.split('/');
let options = {
service: 'WMS',
request: 'GetMap',
layers: strArr[strArr.length - 1],
styles: '',
format: 'image/png',
transparent: 'true',
version: '1.1.1',
width: 256,
height: 256,
srs: this.baseProjection
};
let bbox = this.baseProjection === 'EPSG:4326' ? '{bbox-epsg-4326}' : '{bbox-epsg-3857}';
url += this._getParamString(options, url) + `&bbox=${bbox}`;
return url;
}
/**
* @private
* @function WebMap.prototype._addLayers
* @description 添加叠加图层。
* @param {Object} mapInfo - 图层信息。
*/
_addLayers(layers) {
//存储地图上所有的图层对象
this.layers = layers;
let features,
layerAdded = 0,
len = layers.length;
layers.forEach((layer, index) => {
if ((layer.dataSource && layer.dataSource.serverId) || layer.layerType === 'MARKER') {
// 获取 serverID
let serverId = layer.dataSource ? layer.dataSource.serverId : layer.serverId;
let url = `${this.server}web/datas/${serverId}/content.json?pageSize=9999999¤tPage=1`;
// 获取图层数据
serverId &&
FetchRequest.get(url, null, { withCredentials: this.withCredentials })
.then(response => {
return response.json();
})
.then(data => {
if (data.succeed === false) {
//请求失败
layerAdded++;
this._sendMapToUser(layerAdded, len);
/**
* @event WebMap#getlayersfailed
* @description 获取图层信息失败。
* @property {Object} error - 失败原因。
* @property {mapboxgl.Map} map - MapBoxGL Map 对象。
*/
this.fire('getlayersfailed', { error: data.error, map: this.map });
return;
}
if (data.type) {
if (data.type === 'JSON' || data.type === 'GEOJSON') {
data.content = JSON.parse(data.content.trim());
features = this._formatGeoJSON(data.content, layer);
} else if (data.type === 'EXCEL' || data.type === 'CSV') {
features = this._excelData2Feature(data.content, layer);
}
this._addLayer(layer, features, index);
layerAdded++;
this._sendMapToUser(layerAdded, len);
}
})
.catch(error => {
layerAdded++;
this._sendMapToUser(layerAdded, len);
this.fire('getlayersfailed', { error: error, map: this.map });
});
} else if (
layer.layerType === 'SUPERMAP_REST' ||
layer.layerType === 'TILE' ||
layer.layerType === 'WMS' ||
layer.layerType === 'WMTS'
) {
this._createBaseLayer(layer);
layerAdded++;
this._sendMapToUser(layerAdded, len);
} else if (layer.dataSource && layer.dataSource.type === 'REST_DATA') {
let dataSource = layer.dataSource;
//从restData获取数据
this._getFeatureBySQL(
dataSource.url,
[dataSource.dataSourseName || layer.name],
result => {
features = this._parseGeoJsonData2Feature({
allDatas: { features: result.result.features.features },
fileCode: layer.projection,
featureProjection: this.baseProjection
});
this._addLayer(layer, features, index);
layerAdded++;
this._sendMapToUser(layerAdded, len);
},
err => {
layerAdded++;
this._sendMapToUser(layerAdded, len);
/**
* @event WebMap#getfeaturesfailed
* @description 获取图层要素失败。
* @property {Object} error - 失败原因。
*/
this.fire('getfeaturesfailed', { error: err });
}
);
} else if (layer.dataSource && layer.dataSource.type === 'REST_MAP' && layer.dataSource.url) {
this._queryFeatureBySQL(
layer.dataSource.url,
layer.dataSource.layerName,
'smid=1',
null,
null,
result => {
let recordsets = result && result.result.recordsets;
let recordset = recordsets && recordsets[0];
let attributes = recordset.fields;
if (recordset && attributes) {
let fileterAttrs = [];
for (let i in attributes) {
let value = attributes[i];
if (value.indexOf('Sm') !== 0 || value === 'SmID') {
fileterAttrs.push(value);
}
}
this._getFeatures(
fileterAttrs,
layer,
features => {
this._addLayer(layer, features, index);
layerAdded++;
this._sendMapToUser(layerAdded, len);
},
err => {
layerAdded++;
this.fire('getfeaturesfailed', { error: err, map: this.map });
}
);
}
},
err => {
this.fire('getlayersfailed', { error: err, map: this.map });
}
);
}
}, this);
}
/**
* @private
* @function WebMap.prototype._getFeatures
* @description 将单个图层添加到地图上。
* @param layerInfo 某个图层的图层信息
* @param {Array.<GeoJSON>} features - feature。
*/
_getFeatures(fields, layerInfo, resolve, reject) {
let source = layerInfo.dataSource;
//示例数据
let fileCode = layerInfo.projection;
this._queryFeatureBySQL(
source.url,
source.layerName,
null,
fields,
null,
result => {
let recordsets = result.result.recordsets[0];
let features = recordsets.features.features;
let featuresObj = this._parseGeoJsonData2Feature(
{
allDatas: { features },
fileCode: fileCode,
featureProjection: this.baseProjection
},
'JSON'
);
resolve(featuresObj);
},
err => {
reject(err);
}
);
}
/**
* @private
* @function WebMap.prototype._addLayer
* @description 将单个图层添加到地图上。
* @param layerInfo 某个图层的图层信息
* @param {Array.<GeoJSON>} features - feature。
*/
_addLayer(layerInfo, features, index) {
let layerType = layerInfo.layerType;
layerInfo.layerID = layerType + '-' + layerInfo.name + '-' + index;
layerInfo.visible = layerInfo.visible ? 'visible' : 'none';
// mbgl 目前不能处理 geojson 复杂面情况
// mbgl isssue https://github.com/mapbox/mapbox-gl-js/issues/7023
if (features[0] && features[0].geometry.type === 'Polygon') {
features = this._handleMultyPolygon(features);
}
if (layerInfo.style && layerInfo.filterCondition) {
//将 feature 根据过滤条件进行过滤, 分段专题图和单值专题图因为要计算 styleGroup 所以暂时不过滤
if (layerType !== 'RANGE' && layerType !== 'UNIQUE') {
features = this._getFiterFeatures(layerInfo.filterCondition, features);
}
}
if (layerType === 'VECTOR') {
if (layerInfo.featureType === 'POINT') {
if (layerInfo.style.type === 'SYMBOL_POINT') {
this._createSymbolLayer(layerInfo, features);
} else {
this._createGraphicLayer(layerInfo, features);
}
} else {
//线和面
this._createVectorLayer(layerInfo, features);
}
} else if (layerType === 'UNIQUE') {
this._createUniqueLayer(layerInfo, features);
} else if (layerType === 'RANGE') {
this._createRangeLayer(layerInfo, features);
} else if (layerType === 'HEAT') {
this._createHeatLayer(layerInfo, features);
} else if (layerType === 'MARKER') {
this._createMarkerLayer(layerInfo, features);
}
if (layerInfo.labelStyle && layerInfo.labelStyle.labelField) {
// 存在标签专题图
this._addLabelLayer(layerInfo, features);
}
}
/**
* @private
* @function WebMap.prototype._addLabelLayer
* @description 添加标签图层。
* @param layerInfo 某个图层的图层信息。
* @param {Array.<GeoJSON>} features - feature。
*/
_addLabelLayer(layerInfo, features) {
let labelStyle = layerInfo.labelStyle;
this.map.addLayer({
id: layerInfo.layerID + 'label',
type: 'symbol',
source: {
type: 'geojson',
data: {
type: 'FeatureCollection',
features: features
}
},
paint: {
'text-color': labelStyle.fill
},
layout: {
'text-field': `{${labelStyle.labelField}}`,
'text-size': parseFloat(labelStyle.fontSize) || 12,
'text-offset': labelStyle.offsetX
? [labelStyle.offsetX / 10 || 0, labelStyle.offsetY / 10 || 0]
: [0, -1.5],
'text-font': labelStyle.fontFamily ? [labelStyle.fontFamily] : [],
visibility: layerInfo.visible
}
});
}
/**
* @private
* @function WebMap.prototype._createSymbolLayer
* @description 添加 symbol 图层。
* @param layerInfo 某个图层的图层信息。
* @param {Array.<GeoJSON>} features - feature。
*/
_createSymbolLayer(layerInfo, features) {
//用来请求symbol_point字体文件
let target = document.getElementById(`${this.target}`);
target.classList.add('supermapol-icons-map');
let style = layerInfo.style;
let unicode = layerInfo.style.unicode;
let text = String.fromCharCode(parseInt(unicode.replace(/^&#x/, ''), 16));
let layerID = layerInfo.layerID;
this.map.addSource(layerID + '-source', {
type: 'geojson',
data: {
type: 'FeatureCollection',
features: []
}
});
this.map.addLayer({
id: layerID,
type: 'symbol',
source: layerID + '-source',
paint: {
'text-color': style.fillColor
},
layout: {
'text-field': text,
'text-font': ['supermapol-icons'],
visibility: layerInfo.visible
}
});
this.map.getSource(layerID + '-source').setData({
type: 'FeatureCollection',
features: features
});
}
/**
* @private
* @function WebMap.prototype._createGraphicLayer
* @description 创建 Graphic 图层。
* @param {Object} layerInfo - map 信息。
* @param {Array} features - 属性 信息。
*/
_createGraphicLayer(layerInfo, features) {
let style = layerInfo.style;
let layerStyle = {};
let layerID = layerInfo.layerID;
let source = {
type: 'geojson',
data: {
type: 'FeatureCollection',
features: features
}
};
if (style.type === 'IMAGE_POINT') {
let imageInfo = style.imageInfo;
let imgDom = imageInfo.img;
if (!imgDom || !imgDom.src) {
//要组装成完整的url
imageInfo.url = this.server + imageInfo.url;
}
this.map.loadImage(imageInfo.url || imgDom.src, (error, image) => {
if (error) {
console.log(error);
}
let iconSize = Number.parseFloat((style.radius / image.height).toFixed(2)) * 2;
this.map.addImage('imageIcon', image);
this.map.addLayer({
id: layerID,
type: 'symbol',
source: source,
layout: {
'icon-image': 'imageIcon',
'icon-size': iconSize,
visibility: layerInfo.visible
}
});
});
} else if (style.type === 'SVG_POINT') {
let svg_url = style.url;
if (!this.svgDiv) {
this.svgDiv = document.createElement('div');
document.body.appendChild(this.svgDiv);
}
this._getCanvasFromSVG(svg_url, this.svgDiv, canvas => {
let imgUrl = canvas.toDataURL('img/png');
imgUrl &&
this.map.loadImage(
imgUrl,
(error, image) => {
if (error) {
console.log(error);
}
let iconSize = Number.parseFloat((style.radius / canvas.width).toFixed(2));
this.map.addImage('imageIcon', image);
this.map.addLayer({
id: layerID,
type: 'symbol',
source: source,
layout: {
'icon-image': 'imageIcon',
'icon-size': iconSize,
visibility: layerInfo.visible
}
});
},
this
);
});
} else {
layerStyle.style = this._transformStyleToMapBoxGl(style, layerInfo.featureType);
layerStyle.layout = { visibility: layerInfo.visible };
this._addOverlayToMap('POINT', source, layerID, layerStyle);
}
}
/**
* @private
* @function WebMap.prototype._createUniqueLayer
* @description 创建单值图层。
* @param layerInfo 某个图层的图层信息
* @param features 图层上的 feature
*/
_createUniqueLayer(layerInfo, features) {
let styleGroup = this._getUniqueStyleGroup(layerInfo, features);
features = this._getFiterFeatures(layerInfo.filterCondition, features);
let style = layerInfo.style;
let layerStyle = {};
let themeField = layerInfo.themeSetting.themeField;
let type = layerInfo.featureType;
let expression = ['match', ['get', 'index']];
let layerID = layerInfo.layerID;
features.forEach(row => {
styleGroup.forEach(item => {
if (item.value === row.properties[themeField]) {
expression.push(row.properties['index'], item.color);
}
});
});
expression.push('#ffffff');
layerStyle.style = this._transformStyleToMapBoxGl(style, type, expression);
let visible = layerInfo.visible;
layerStyle.layout = { visibility: visible };
let source = {
type: 'geojson',
data: {
type: 'FeatureCollection',
features: features
}
};
this._addOverlayToMap(type, source, layerID, layerStyle);
type === 'POLYGON' &&
style.strokeColor &&
this._addStrokeLineForPoly(style, source, layerID + '-strokeLine', visible);
}