/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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import { each, isString, createHashMap } from 'zrender/src/core/util';
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import parseGeoJson from './parseGeoJson';
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// Built-in GEO fixer.
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import fixNanhai from './fix/nanhai';
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import fixTextCoord from './fix/textCoord';
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import fixGeoCoord from './fix/geoCoord';
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import fixDiaoyuIsland from './fix/diaoyuIsland';
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import BoundingRect from 'zrender/src/core/BoundingRect';
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import { GeoJSONRegion } from './Region';
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import { GeoJSON, GeoJSONCompressed, GeoJSONSourceInput, GeoResource, GeoSpecialAreas, NameMap } from './geoTypes';
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const DEFAULT_NAME_PROPERTY = 'name' as const;
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export class GeoJSONResource implements GeoResource {
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readonly type = 'geoJSON';
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private _geoJSON: GeoJSON | GeoJSONCompressed;
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private _specialAreas: GeoSpecialAreas;
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private _mapName: string;
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private _parsedMap = createHashMap<{
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regions: GeoJSONRegion[];
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boundingRect: BoundingRect;
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}, string>();
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constructor(
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mapName: string,
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geoJSON: GeoJSONSourceInput,
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specialAreas: GeoSpecialAreas
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) {
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this._mapName = mapName;
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this._specialAreas = specialAreas;
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// PENDING: delay the parse to the first usage to rapid up the FMP?
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this._geoJSON = parseInput(geoJSON);
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}
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/**
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* @param nameMap can be null/undefined
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* @param nameProperty can be null/undefined
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*/
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load(nameMap: NameMap, nameProperty: string) {
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nameProperty = nameProperty || DEFAULT_NAME_PROPERTY;
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let parsed = this._parsedMap.get(nameProperty);
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if (!parsed) {
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const rawRegions = this._parseToRegions(nameProperty);
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parsed = this._parsedMap.set(nameProperty, {
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regions: rawRegions,
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boundingRect: calculateBoundingRect(rawRegions)
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});
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}
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const regionsMap = createHashMap<GeoJSONRegion>();
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const finalRegions: GeoJSONRegion[] = [];
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each(parsed.regions, function (region) {
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let regionName = region.name;
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// Try use the alias in geoNameMap
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if (nameMap && nameMap.hasOwnProperty(regionName)) {
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region = region.cloneShallow(regionName = nameMap[regionName]);
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}
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finalRegions.push(region);
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regionsMap.set(regionName, region);
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});
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return {
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regions: finalRegions,
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boundingRect: parsed.boundingRect || new BoundingRect(0, 0, 0, 0),
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regionsMap: regionsMap
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};
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}
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private _parseToRegions(nameProperty: string): GeoJSONRegion[] {
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const mapName = this._mapName;
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const geoJSON = this._geoJSON;
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let rawRegions;
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// https://jsperf.com/try-catch-performance-overhead
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try {
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rawRegions = geoJSON ? parseGeoJson(geoJSON, nameProperty) : [];
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}
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catch (e) {
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throw new Error('Invalid geoJson format\n' + e.message);
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}
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fixNanhai(mapName, rawRegions);
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each(rawRegions, function (region) {
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const regionName = region.name;
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fixTextCoord(mapName, region);
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fixGeoCoord(mapName, region);
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fixDiaoyuIsland(mapName, region);
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// Some area like Alaska in USA map needs to be tansformed
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// to look better
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const specialArea = this._specialAreas && this._specialAreas[regionName];
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if (specialArea) {
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region.transformTo(
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specialArea.left, specialArea.top, specialArea.width, specialArea.height
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);
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}
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}, this);
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return rawRegions;
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}
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/**
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* Only for exporting to users.
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* **MUST NOT** used internally.
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*/
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getMapForUser(): {
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// backward compat.
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geoJson: GeoJSON | GeoJSONCompressed;
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geoJSON: GeoJSON | GeoJSONCompressed;
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specialAreas: GeoSpecialAreas;
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} {
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return {
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// For backward compatibility, use geoJson
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// PENDING: it has been returning them without clone.
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// do we need to avoid outsite modification?
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geoJson: this._geoJSON,
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geoJSON: this._geoJSON,
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specialAreas: this._specialAreas
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};
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}
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}
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function calculateBoundingRect(regions: GeoJSONRegion[]): BoundingRect {
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let rect;
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for (let i = 0; i < regions.length; i++) {
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const regionRect = regions[i].getBoundingRect();
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rect = rect || regionRect.clone();
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rect.union(regionRect);
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}
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return rect;
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}
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function parseInput(source: GeoJSONSourceInput): GeoJSON | GeoJSONCompressed {
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return !isString(source)
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? source
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: (typeof JSON !== 'undefined' && JSON.parse)
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? JSON.parse(source)
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: (new Function('return (' + source + ');'))();
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}
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