Expose a new export: without-countries

This commit is contained in:
Basile Bruneau
2021-04-23 23:42:01 +02:00
committed by Basile Bruneau
parent a6873175d3
commit 571696b296
11 changed files with 425 additions and 242 deletions
+2 -1
View File
@@ -1,4 +1,5 @@
node_modules/
test.js
*.svg
dist/
/index.js
/without-countries.js
+1 -1
View File
@@ -5,5 +5,5 @@
"singleQuote": true,
"arrowParens": "always",
"bracketSpacing": true,
"printWidth": 120
"printWidth": 80
}
Vendored
+6 -1
View File
@@ -4,12 +4,15 @@ namespace DottedMapLib {
lng: { min: number; max: number };
}
interface Settings {
interface MapSettings {
height?: number;
width?: number;
countries?: string[];
region?: Region;
grid?: 'vertical' | 'diagonal';
}
interface Settings extends MapSettings {
avoidOuterPins?: false | true;
}
@@ -40,6 +43,8 @@ namespace DottedMapLib {
};
}
export const getMapJSON: (settings: DottedMapLib.MapSettings) => string;
export default class DottedMap {
constructor(settings: DottedMapLib.Settings);
+46 -46
View File
@@ -1,11 +1,11 @@
{
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"dependencies": {
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@@ -69,9 +69,9 @@
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@@ -327,14 +327,14 @@
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@@ -411,15 +411,15 @@
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@@ -1235,20 +1235,20 @@
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"acorn": "^8.0.4",
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@@ -1449,9 +1449,9 @@
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@@ -1679,14 +1679,14 @@
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"escalade": "^3.1.1",
"node-releases": "^1.1.71"
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@@ -1698,9 +1698,9 @@
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@@ -1744,15 +1744,15 @@
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@@ -2357,20 +2357,20 @@
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+7 -3
View File
@@ -1,9 +1,13 @@
{
"name": "dotted-map",
"version": "2.0.0",
"version": "2.1.1",
"description": "Create a SVG map filled with dots for the world or countries",
"main": "dist/dotted-map.js",
"module": "src/index.js",
"main": "./index.js",
"exports": {
".": "./index.js",
"./without-countries": "./without-countries.js"
},
"module": "./src/with-countries.js",
"scripts": {
"build": "webpack"
},
View File
-186
View File
@@ -1,186 +0,0 @@
import proj4 from 'proj4';
import inside from '@turf/boolean-point-in-polygon';
import geojsonWorld from './countries.geo.json';
// TODO
// [ ] Handle prefill cache →
// [ ] Method to export a cache
// [ ] Method to import a cache
// [ ] Make two exports: one with countries, one without (reduce bundle size)
const geojsonByCountry = geojsonWorld.features.reduce((countries, feature) => {
countries[feature.id] = feature;
return countries;
}, {});
const geojsonToMultiPolygons = (geojson) => {
const coordinates = geojson.features.reduce(
(poly, feature) =>
poly.concat(feature.geometry.type === 'Polygon' ? [feature.geometry.coordinates] : feature.geometry.coordinates),
[],
);
return { type: 'Feature', geometry: { type: 'MultiPolygon', coordinates } };
};
const CACHE = {};
const DEFAULT_WORLD_REGION = {
lat: { min: -56, max: 71 },
lng: { min: -179, max: 179 },
};
const computeGeojsonBox = (geojson) => {
const { type, features, geometry, coordinates } = geojson;
if (type === 'FeatureCollection') {
const boxes = features.map(computeGeojsonBox);
return {
lat: {
min: Math.min(...boxes.map((box) => box.lat.min)),
max: Math.max(...boxes.map((box) => box.lat.max)),
},
lng: {
min: Math.min(...boxes.map((box) => box.lng.min)),
max: Math.max(...boxes.map((box) => box.lng.max)),
},
};
} else if (type == 'Feature') {
return computeGeojsonBox(geometry);
} else if (type === 'MultiPolygon') {
return computeGeojsonBox({ type: 'Polygon', coordinates: coordinates.flat() });
} else if (type == 'Polygon') {
const coords = coordinates.flat();
const latitudes = coords.map(([_lng, lat]) => lat);
const longitudes = coords.map(([lng, _lat]) => lng);
return {
lat: {
min: Math.min(...latitudes),
max: Math.max(...latitudes),
},
lng: {
min: Math.min(...longitudes),
max: Math.max(...longitudes),
},
};
} else {
throw new Error(`Unknown geojson type ${type}`);
}
};
function DottedMap({ height = 0, width = 0, countries = [], region, grid = 'vertical', avoidOuterPins = false }) {
if (height <= 0 && width <= 0) {
throw new Error('height or width is required');
}
let geojson = geojsonWorld;
if (countries.length > 0) {
geojson = {
type: 'FeatureCollection',
features: countries.map((country) => geojsonByCountry[country]),
};
if (!region) {
region = computeGeojsonBox(geojson);
}
} else if (!region) {
region = DEFAULT_WORLD_REGION;
}
const poly = geojsonToMultiPolygons(geojson);
const cacheKey = [JSON.stringify(region), grid, height, width, JSON.stringify(countries)].join(' ');
const [X_MIN, Y_MIN] = proj4(proj4.defs('GOOGLE'), [region.lng.min, region.lat.min]);
const [X_MAX, Y_MAX] = proj4(proj4.defs('GOOGLE'), [region.lng.max, region.lat.max]);
const X_RANGE = X_MAX - X_MIN;
const Y_RANGE = Y_MAX - Y_MIN;
if (width <= 0) {
width = Math.round((height * X_RANGE) / Y_RANGE);
} else if (height <= 0) {
height = Math.round((width * Y_RANGE) / X_RANGE);
}
const points = { ...CACHE[cacheKey] } || {};
const ystep = grid === 'diagonal' ? Math.sqrt(3) / 2 : 1;
if (!CACHE[cacheKey]) {
for (let y = 0; y * ystep < height; y += 1) {
for (let x = 0; x < width; x += 1) {
const localx = y % 2 === 0 && grid === 'diagonal' ? x + 0.5 : x;
const localy = y * ystep;
const pointGoogle = [(localx / width) * X_RANGE + X_MIN, Y_MAX - (localy / height) * Y_RANGE];
const wgs84Point = proj4(proj4.defs('GOOGLE'), proj4.defs('WGS84'), pointGoogle);
if (inside(wgs84Point, poly)) {
points[[x, y].join(';')] = { x: localx, y: localy };
}
}
}
CACHE[cacheKey] = { ...points };
}
return {
addPin({ lat, lng, data, svgOptions }) {
const [googleX, googleY] = proj4(proj4.defs('GOOGLE'), [lng, lat]);
if (avoidOuterPins) {
const wgs84Point = proj4(proj4.defs('GOOGLE'), proj4.defs('WGS84'), [googleX, googleY]);
if (!inside(wgs84Point, poly)) return;
}
let [rawX, rawY] = [(width * (googleX - X_MIN)) / X_RANGE, (height * (Y_MAX - googleY)) / Y_RANGE];
const y = Math.round(rawY / ystep);
if (y % 2 === 0 && grid === 'diagonal') {
rawX -= 0.5;
}
const x = Math.round(rawX);
let [localx, localy] = [x, Math.round(y) * ystep];
if (y % 2 === 0 && grid === 'diagonal') {
localx += 0.5;
}
const point = { x: localx, y: localy, data, svgOptions };
points[[x, y].join(';')] = point;
return point;
},
getPoints() {
return Object.values(points);
},
getSVG({ shape = 'circle', color = 'current', backgroundColor = 'transparent', radius = 0.5 }) {
const getPoint = ({ x, y, svgOptions = {} }) => {
const pointRadius = svgOptions.radius || radius;
if (shape === 'circle') {
return `<circle cx="${x}" cy="${y}" r="${pointRadius}" fill="${svgOptions.color || color}" />`;
} else if (shape === 'hexagon') {
const sqrt3radius = Math.sqrt(3) * pointRadius;
const polyPoints = [
[x + sqrt3radius, y - pointRadius],
[x + sqrt3radius, y + pointRadius],
[x, y + 2 * pointRadius],
[x - sqrt3radius, y + pointRadius],
[x - sqrt3radius, y - pointRadius],
[x, y - 2 * pointRadius],
];
return `<polyline points="${polyPoints.map((point) => point.join(',')).join(' ')}" fill="${
svgOptions.color || color
}" />`;
}
};
return `<svg viewBox="0 0 ${width} ${height}" xmlns="http://www.w3.org/2000/svg" style="background-color: ${backgroundColor}">
${Object.values(points).map(getPoint).join('\n')}
</svg>`;
},
image: {
region,
width,
height,
},
};
}
export default DottedMap;
+180
View File
@@ -0,0 +1,180 @@
import proj4 from 'proj4';
import inside from '@turf/boolean-point-in-polygon';
import geojsonWorld from './countries.geo.json';
import DottedMapWithoutCountries from './without-countries';
const geojsonByCountry = geojsonWorld.features.reduce((countries, feature) => {
countries[feature.id] = feature;
return countries;
}, {});
const geojsonToMultiPolygons = (geojson) => {
const coordinates = geojson.features.reduce(
(poly, feature) =>
poly.concat(
feature.geometry.type === 'Polygon'
? [feature.geometry.coordinates]
: feature.geometry.coordinates,
),
[],
);
return { type: 'Feature', geometry: { type: 'MultiPolygon', coordinates } };
};
const CACHE = {};
const DEFAULT_WORLD_REGION = {
lat: { min: -56, max: 71 },
lng: { min: -179, max: 179 },
};
const computeGeojsonBox = (geojson) => {
const { type, features, geometry, coordinates } = geojson;
if (type === 'FeatureCollection') {
const boxes = features.map(computeGeojsonBox);
return {
lat: {
min: Math.min(...boxes.map((box) => box.lat.min)),
max: Math.max(...boxes.map((box) => box.lat.max)),
},
lng: {
min: Math.min(...boxes.map((box) => box.lng.min)),
max: Math.max(...boxes.map((box) => box.lng.max)),
},
};
} else if (type == 'Feature') {
return computeGeojsonBox(geometry);
} else if (type === 'MultiPolygon') {
return computeGeojsonBox({
type: 'Polygon',
coordinates: coordinates.flat(),
});
} else if (type == 'Polygon') {
const coords = coordinates.flat();
const latitudes = coords.map(([_lng, lat]) => lat);
const longitudes = coords.map(([lng, _lat]) => lng);
return {
lat: {
min: Math.min(...latitudes),
max: Math.max(...latitudes),
},
lng: {
min: Math.min(...longitudes),
max: Math.max(...longitudes),
},
};
} else {
throw new Error(`Unknown geojson type ${type}`);
}
};
const getMap = ({
height = 0,
width = 0,
countries = [],
region,
grid = 'vertical',
}) => {
if (height <= 0 && width <= 0) {
throw new Error('height or width is required');
}
let geojson = geojsonWorld;
if (countries.length > 0) {
geojson = {
type: 'FeatureCollection',
features: countries.map((country) => geojsonByCountry[country]),
};
if (!region) {
region = computeGeojsonBox(geojson);
}
} else if (!region) {
region = DEFAULT_WORLD_REGION;
}
const poly = geojsonToMultiPolygons(geojson);
const [X_MIN, Y_MIN] = proj4(proj4.defs('GOOGLE'), [
region.lng.min,
region.lat.min,
]);
const [X_MAX, Y_MAX] = proj4(proj4.defs('GOOGLE'), [
region.lng.max,
region.lat.max,
]);
const X_RANGE = X_MAX - X_MIN;
const Y_RANGE = Y_MAX - Y_MIN;
if (width <= 0) {
width = Math.round((height * X_RANGE) / Y_RANGE);
} else if (height <= 0) {
height = Math.round((width * Y_RANGE) / X_RANGE);
}
const points = {};
const ystep = grid === 'diagonal' ? Math.sqrt(3) / 2 : 1;
for (let y = 0; y * ystep < height; y += 1) {
for (let x = 0; x < width; x += 1) {
const localx = y % 2 === 0 && grid === 'diagonal' ? x + 0.5 : x;
const localy = y * ystep;
const pointGoogle = [
(localx / width) * X_RANGE + X_MIN,
Y_MAX - (localy / height) * Y_RANGE,
];
const wgs84Point = proj4(
proj4.defs('GOOGLE'),
proj4.defs('WGS84'),
pointGoogle,
);
if (inside(wgs84Point, poly)) {
points[[x, y].join(';')] = { x: localx, y: localy };
}
}
}
return {
points,
X_MIN,
Y_MIN,
X_MAX,
Y_MAX,
X_RANGE,
Y_RANGE,
region,
grid,
height,
width,
ystep,
};
};
export const getMapJSON = (props) => JSON.stringify(getMap(props));
const getCacheKey = ({
height = 0,
width = 0,
countries = [],
region,
grid = 'vertical',
}) => {
return [
JSON.stringify(region),
grid,
height,
width,
JSON.stringify(countries),
].join(' ');
};
function DottedMap({ avoidOuterPins = false, ...args }) {
const cacheKey = getCacheKey(args);
const map = CACHE[cacheKey] || getMap(args);
return new DottedMapWithoutCountries({ avoidOuterPins, map });
}
export default DottedMap;
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@@ -0,0 +1,93 @@
import proj4 from 'proj4';
import inside from '@turf/boolean-point-in-polygon';
function DottedMapWithoutCountries({ map, avoidOuterPins = false }) {
const {
points,
X_MIN,
Y_MAX,
X_RANGE,
Y_RANGE,
region,
grid,
width,
height,
ystep,
} = map;
return {
addPin({ lat, lng, data, svgOptions }) {
const [googleX, googleY] = proj4(proj4.defs('GOOGLE'), [lng, lat]);
if (avoidOuterPins) {
const wgs84Point = proj4(proj4.defs('GOOGLE'), proj4.defs('WGS84'), [
googleX,
googleY,
]);
if (!inside(wgs84Point, poly)) return;
}
let [rawX, rawY] = [
(width * (googleX - X_MIN)) / X_RANGE,
(height * (Y_MAX - googleY)) / Y_RANGE,
];
const y = Math.round(rawY / ystep);
if (y % 2 === 0 && grid === 'diagonal') {
rawX -= 0.5;
}
const x = Math.round(rawX);
let [localx, localy] = [x, Math.round(y) * ystep];
if (y % 2 === 0 && grid === 'diagonal') {
localx += 0.5;
}
const point = { x: localx, y: localy, data, svgOptions };
points[[x, y].join(';')] = point;
return point;
},
getPoints() {
return Object.values(points);
},
getSVG({
shape = 'circle',
color = 'current',
backgroundColor = 'transparent',
radius = 0.5,
}) {
const getPoint = ({ x, y, svgOptions = {} }) => {
const pointRadius = svgOptions.radius || radius;
if (shape === 'circle') {
return `<circle cx="${x}" cy="${y}" r="${pointRadius}" fill="${
svgOptions.color || color
}" />`;
} else if (shape === 'hexagon') {
const sqrt3radius = Math.sqrt(3) * pointRadius;
const polyPoints = [
[x + sqrt3radius, y - pointRadius],
[x + sqrt3radius, y + pointRadius],
[x, y + 2 * pointRadius],
[x - sqrt3radius, y + pointRadius],
[x - sqrt3radius, y - pointRadius],
[x, y - 2 * pointRadius],
];
return `<polyline points="${polyPoints
.map((point) => point.join(','))
.join(' ')}" fill="${svgOptions.color || color}" />`;
}
};
return `<svg viewBox="0 0 ${width} ${height}" xmlns="http://www.w3.org/2000/svg" style="background-color: ${backgroundColor}">
${Object.values(points).map(getPoint).join('\n')}
</svg>`;
},
image: {
region,
width,
height,
},
};
}
export default DottedMapWithoutCountries;
+25 -4
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@@ -1,16 +1,37 @@
const path = require('path');
const fs = require('fs');
class CleanOutput {
apply(compiler) {
compiler.hooks.thisCompilation.tap('CleanOutput', () => {
if (fs.existsSync('./index.js')) {
fs.rmSync('./index.js');
}
if (fs.existsSync('./without-countries.js')) {
fs.rmSync('./without-countries.js');
}
});
}
}
module.exports = {
entry: './src/index.js',
entry: {
index: './src/with-countries.js',
'without-countries': './src/without-countries.js',
},
mode: 'production',
output: {
path: path.resolve(__dirname, 'dist'),
filename: 'dotted-map.js',
path: path.resolve(__dirname),
filename: '[name].js',
library: {
name: 'dotted-map',
type: 'umd',
},
globalObject: 'this',
clean: true,
},
externals: {
'@turf/boolean-point-in-polygon': '@turf/boolean-point-in-polygon',
proj4: 'proj4',
},
plugins: [new CleanOutput()],
};
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namespace DottedMapWithoutCountriesLib {
interface Region {
lat: { min: number; max: number };
lng: { min: number; max: number };
}
interface Map {
points: Point[];
X_MIN: number;
Y_MAX: number;
X_RANGE: number;
Y_RANGE: number;
region: Region;
grid: 'vertical' | 'diagonal';
width: number;
height: number;
ystep: number;
}
interface Settings extends MapSettings {
map: Map;
avoidOuterPins?: false | true;
}
interface SvgOptions {
color?: string;
radius?: number;
}
interface Pin {
lat: number;
lng: number;
data?: any;
svgOptions?: SvgOptions;
}
interface SvgSettings {
shape?: 'circle' | 'hexagon';
color?: string;
backgroundColor?: string;
radius?: number;
}
type Point = {
x: number;
y: number;
data?: any;
svgOptions?: SvgOptions;
};
}
export default class DottedMapWithoutCountries {
constructor(settings: DottedMapWithoutCountriesLib.Settings);
addPin(
pin: DottedMapWithoutCountriesLib.Pin,
): DottedMapWithoutCountriesLib.Point;
getPoints(): DottedMapWithoutCountriesLib.Point[];
getSVG(settings: DottedMapWithoutCountriesLib.SvgSettings): string;
image: {
region: DottedMap.Region;
width: number;
height: number;
};
}