99 lines
2.4 KiB
JavaScript
99 lines
2.4 KiB
JavaScript
/**
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* Copyright 2004-present Facebook. All Rights Reserved.
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*
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* @providesModule Geolocation
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*/
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'use strict';
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var RCTDeviceEventEmitter = require('RCTDeviceEventEmitter');
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var RCTLocationObserver = require('NativeModules').LocationObserver;
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var invariant = require('invariant');
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var logError = require('logError');
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var warning = require('warning');
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var subscriptions = [];
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var updatesEnabled = false;
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/**
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* /!\ ATTENTION /!\
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* You need to add NSLocationWhenInUseUsageDescription key
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* in Info.plist to enable geolocation, otherwise it's going
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* to *fail silently*!
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* \!/ \!/
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*
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* Geolocation follows the MDN specification:
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* https://developer.mozilla.org/en-US/docs/Web/API/Geolocation
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*/
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var Geolocation = {
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getCurrentPosition: function(geo_success, geo_error, geo_options) {
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invariant(
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typeof geo_success === 'function',
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'Must provide a valid geo_success callback.'
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);
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RCTLocationObserver.getCurrentPosition(
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geo_options || {},
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geo_success,
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geo_error || logError
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);
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},
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watchPosition: function(success, error, options) {
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if (!updatesEnabled) {
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RCTLocationObserver.startObserving(options || {});
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updatesEnabled = true;
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}
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var watchID = subscriptions.length;
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subscriptions.push([
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RCTDeviceEventEmitter.addListener(
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'geolocationDidChange',
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success
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),
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error ? RCTDeviceEventEmitter.addListener(
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'geolocationError',
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error
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) : null,
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]);
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return watchID;
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},
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clearWatch: function(watchID) {
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var sub = subscriptions[watchID];
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if (!sub) {
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// Silently exit when the watchID is invalid or already cleared
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// This is consistent with timers
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return;
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}
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sub[0].remove();
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sub[1] && sub[1].remove();
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subscriptions[watchID] = undefined;
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var noWatchers = true;
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for (var ii = 0; ii < subscriptions.length; ii++) {
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if (subscriptions[ii]) {
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noWatchers = false; // still valid subscriptions
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}
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}
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if (noWatchers) {
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Geolocation.stopObserving();
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}
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},
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stopObserving: function() {
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if (updatesEnabled) {
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RCTLocationObserver.stopObserving();
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updatesEnabled = false;
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for (var ii = 0; ii < subscriptions.length; ii++) {
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if (subscriptions[ii]) {
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warning('Called stopObserving with existing subscriptions.');
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subscriptions[ii].remove();
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}
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}
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subscriptions = [];
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}
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}
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}
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module.exports = Geolocation;
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