expo-location
Version:
Allows reading geolocation information from the device. Your app can poll for the current location or subscribe to location update events.
59 lines • 2.19 kB
JavaScript
import { Platform } from 'expo-modules-core';
import ExpoLocation from './ExpoLocation';
import { LocationAccuracy } from './Location.types';
import { LocationSubscriber } from './LocationSubscribers';
// @needsAudit
/**
* Polyfills `navigator.geolocation` for interop with the core React Native and Web API approach to geolocation.
*/
export function installWebGeolocationPolyfill() {
if (Platform.OS !== 'web') {
// Make sure `window.navigator` is defined in the global scope.
if (!('window' in global)) {
global.window = global;
}
if (!('navigator' in global.window)) {
global.window.navigator = {};
}
// @ts-ignore
window.navigator.geolocation = {
getCurrentPosition,
watchPosition,
clearWatch,
};
}
}
function convertGeolocationOptions(options) {
return {
accuracy: options.enableHighAccuracy ? LocationAccuracy.High : LocationAccuracy.Balanced,
};
}
function getCurrentPosition(success, error = () => { }, options = {}) {
_getCurrentPositionAsyncWrapper(success, error, options);
}
// This function exists to let us continue to return undefined from getCurrentPosition, while still
// using async/await for the internal implementation of it
async function _getCurrentPositionAsyncWrapper(success, error, options) {
try {
await ExpoLocation.requestPermissionsAsync();
const result = await ExpoLocation.getCurrentPositionAsync(convertGeolocationOptions(options));
success(result);
}
catch (e) {
error(e);
}
}
// Polyfill: navigator.geolocation.watchPosition
function watchPosition(success, error, options) {
const watchId = LocationSubscriber.registerCallback(success);
ExpoLocation.watchPositionImplAsync(watchId, options).catch((err) => {
LocationSubscriber.unregisterCallback(watchId);
error({ watchId, message: err.message, code: err.code });
});
return watchId;
}
// Polyfill: navigator.geolocation.clearWatch
function clearWatch(watchId) {
LocationSubscriber.unregisterCallback(watchId);
}
//# sourceMappingURL=GeolocationPolyfill.js.map