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/*
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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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|
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/**
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* AUTO-GENERATED FILE. DO NOT MODIFY.
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*/
|
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/*
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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
|
* distributed with this work for additional information
|
* regarding copyright ownership. The ASF licenses this file
|
* to you under the Apache License, Version 2.0 (the
|
* "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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/**
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* Parse and decode geo json
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*/
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import * as zrUtil from 'zrender/lib/core/util.js';
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import { GeoJSONLineStringGeometry, GeoJSONPolygonGeometry, GeoJSONRegion } from './Region.js';
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function decode(json) {
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if (!json.UTF8Encoding) {
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return json;
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}
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var jsonCompressed = json;
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var encodeScale = jsonCompressed.UTF8Scale;
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if (encodeScale == null) {
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encodeScale = 1024;
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}
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var features = jsonCompressed.features;
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zrUtil.each(features, function (feature) {
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var geometry = feature.geometry;
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var encodeOffsets = geometry.encodeOffsets;
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var coordinates = geometry.coordinates;
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// Geometry may be appeded manually in the script after json loaded.
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// In this case this geometry is usually not encoded.
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if (!encodeOffsets) {
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return;
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}
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switch (geometry.type) {
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case 'LineString':
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geometry.coordinates = decodeRing(coordinates, encodeOffsets, encodeScale);
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break;
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case 'Polygon':
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decodeRings(coordinates, encodeOffsets, encodeScale);
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break;
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case 'MultiLineString':
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decodeRings(coordinates, encodeOffsets, encodeScale);
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break;
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case 'MultiPolygon':
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zrUtil.each(coordinates, function (rings, idx) {
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return decodeRings(rings, encodeOffsets[idx], encodeScale);
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});
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}
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});
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// Has been decoded
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jsonCompressed.UTF8Encoding = false;
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return jsonCompressed;
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}
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function decodeRings(rings, encodeOffsets, encodeScale) {
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for (var c = 0; c < rings.length; c++) {
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rings[c] = decodeRing(rings[c], encodeOffsets[c], encodeScale);
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}
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}
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function decodeRing(coordinate, encodeOffsets, encodeScale) {
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var result = [];
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var prevX = encodeOffsets[0];
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var prevY = encodeOffsets[1];
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for (var i = 0; i < coordinate.length; i += 2) {
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var x = coordinate.charCodeAt(i) - 64;
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var y = coordinate.charCodeAt(i + 1) - 64;
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// ZigZag decoding
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x = x >> 1 ^ -(x & 1);
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y = y >> 1 ^ -(y & 1);
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// Delta deocding
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x += prevX;
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y += prevY;
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prevX = x;
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prevY = y;
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// Dequantize
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result.push([x / encodeScale, y / encodeScale]);
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}
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return result;
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}
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export default function parseGeoJSON(geoJson, nameProperty) {
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geoJson = decode(geoJson);
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return zrUtil.map(zrUtil.filter(geoJson.features, function (featureObj) {
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// Output of mapshaper may have geometry null
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return featureObj.geometry && featureObj.properties && featureObj.geometry.coordinates.length > 0;
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}), function (featureObj) {
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var properties = featureObj.properties;
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var geo = featureObj.geometry;
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var geometries = [];
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switch (geo.type) {
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case 'Polygon':
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var coordinates = geo.coordinates;
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// According to the GeoJSON specification.
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// First must be exterior, and the rest are all interior(holes).
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geometries.push(new GeoJSONPolygonGeometry(coordinates[0], coordinates.slice(1)));
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break;
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case 'MultiPolygon':
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zrUtil.each(geo.coordinates, function (item) {
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if (item[0]) {
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geometries.push(new GeoJSONPolygonGeometry(item[0], item.slice(1)));
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}
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});
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break;
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case 'LineString':
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geometries.push(new GeoJSONLineStringGeometry([geo.coordinates]));
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break;
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case 'MultiLineString':
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geometries.push(new GeoJSONLineStringGeometry(geo.coordinates));
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}
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var region = new GeoJSONRegion(properties[nameProperty || 'name'], geometries, properties.cp);
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region.properties = properties;
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return region;
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});
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}
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