demarches-normaliennes/app/javascript/components/shared/maplibre/MapLibre.tsx
2022-02-09 10:29:00 +01:00

104 lines
2.6 KiB
TypeScript
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

import React, {
useState,
useContext,
useRef,
useEffect,
useMemo,
ReactNode,
createContext
} from 'react';
import maplibre, { Map, Style, NavigationControl } from 'maplibre-gl';
import invariant from 'tiny-invariant';
import { useStyle } from './hooks';
import { StyleControl } from './StyleControl';
const Context = createContext<{ map?: Map | null }>({});
type MapLibreProps = {
layers: string[];
header?: ReactNode;
footer?: ReactNode;
children: ReactNode;
};
export function useMapLibre() {
const context = useContext(Context);
invariant(context.map, 'Maplibre not initialized');
return context.map;
}
export function MapLibre({ children, header, footer, layers }: MapLibreProps) {
const isSupported = useMemo(
() => maplibre.supported({ failIfMajorPerformanceCaveat: true }) && !isIE(),
[]
);
const containerRef = useRef<HTMLDivElement>(null);
const [map, setMap] = useState<Map | null>();
const onStyleChange = (style: Style) => {
if (map) {
map.setStyle(style);
}
};
const { style, ...mapStyleProps } = useStyle(layers, onStyleChange);
useEffect(() => {
if (isSupported && !map) {
invariant(containerRef.current, 'Map container not found');
const map = new Map({
container: containerRef.current,
style
});
map.addControl(new NavigationControl({}), 'top-right');
map.on('load', () => {
setMap(map);
});
}
}, []);
if (!isSupported) {
return (
<div
style={{ marginBottom: '20px' }}
className="outdated-browser-banner site-banner"
>
<div className="container">
<div className="site-banner-icon"></div>
<div className="site-banner-text">
Nous ne pouvons pas afficher la carte car elle est imcompatible avec
votre navigateur. Nous vous conseillons de le mettre à jour ou
dutiliser{' '}
<a
href="https://browser-update.org/fr/update.html"
target="_blank"
rel="noopener noreferrer"
>
un navigateur plus récent
</a>
.
</div>
</div>
</div>
);
}
return (
<Context.Provider value={{ map }}>
{map ? header : null}
<div ref={containerRef} style={{ height: '500px' }}>
<StyleControl styleId={style.id} {...mapStyleProps} />
{map ? children : null}
</div>
{map ? footer : null}
</Context.Provider>
);
}
function isIE() {
const ua = window.navigator.userAgent;
const msie = ua.indexOf('MSIE ');
const trident = ua.indexOf('Trident/');
return msie > 0 || trident > 0;
}