expo
Version:
110 lines (109 loc) • 4 kB
JavaScript
// Prevent pulling in all of expo-modules-core on web
import { EventEmitter } from 'expo-modules-core/build/EventEmitter';
import React, { useEffect, useState, useRef, useMemo } from 'react';
import { Animated, StyleSheet, Text, Platform, View } from 'react-native';
import DevLoadingViewNativeModule from './DevLoadingViewNativeModule';
import { getInitialSafeArea } from './getInitialSafeArea';
export default function DevLoadingView() {
const [message, setMessage] = useState('Refreshing...');
const [isDevLoading, setIsDevLoading] = useState(false);
const [isAnimating, setIsAnimating] = useState(false);
const translateY = useRef(new Animated.Value(0)).current;
const emitter = useMemo(() => {
try {
return new EventEmitter(DevLoadingViewNativeModule);
}
catch (error) {
throw new Error('Failed to instantiate native emitter in `DevLoadingView` because the native module `DevLoadingView` is undefined: ' +
error.message);
}
}, []);
useEffect(() => {
if (!emitter)
return;
function handleShowMessage(event) {
setMessage(event.message);
// TODO: if we show the refreshing banner and don't get a hide message
// for 3 seconds, warn the user that it's taking a while and suggest
// they reload
translateY.setValue(0);
setIsDevLoading(true);
}
function handleHide() {
// TODO: if we showed the 'refreshing' banner less than 250ms ago, delay
// switching to the 'finished' banner
setIsAnimating(true);
setIsDevLoading(false);
Animated.timing(translateY, {
toValue: 150,
delay: 1000,
duration: 350,
useNativeDriver: Platform.OS !== 'web',
}).start(({ finished }) => {
if (finished) {
setIsAnimating(false);
translateY.setValue(0);
}
});
}
const showMessageSubscription = emitter.addListener('devLoadingView:showMessage', handleShowMessage);
const hideSubscription = emitter.addListener('devLoadingView:hide', handleHide);
return function cleanup() {
showMessageSubscription.remove();
hideSubscription.remove();
};
}, [translateY, emitter]);
if (!isDevLoading && !isAnimating) {
return null;
}
return (<Animated.View style={[styles.animatedContainer, { transform: [{ translateY }] }]}>
<View style={styles.banner}>
<View style={styles.contentContainer}>
<View style={{ flexDirection: 'row' }}>
<Text style={styles.text}>{message}</Text>
</View>
<View style={{ flex: 1 }}>
<Text style={styles.subtitle}>
{isDevLoading ? 'Using Fast Refresh' : "Don't see your changes? Reload the app"}
</Text>
</View>
</View>
</View>
</Animated.View>);
}
const styles = StyleSheet.create({
animatedContainer: {
// @ts-expect-error: fixed is not a valid value for position in Yoga but it is on web.
position: Platform.select({
web: 'fixed',
default: 'absolute',
}),
pointerEvents: 'none',
bottom: 0,
left: 0,
right: 0,
zIndex: 42, // arbitrary
},
banner: {
flex: 1,
overflow: 'visible',
backgroundColor: 'rgba(0,0,0,0.75)',
paddingBottom: getInitialSafeArea().bottom,
},
contentContainer: {
flex: 1,
paddingTop: 10,
paddingBottom: 5,
alignItems: 'center',
justifyContent: 'center',
textAlign: 'center',
},
text: {
color: '#fff',
fontSize: 15,
},
subtitle: {
color: 'rgba(255,255,255,0.8)',
},
});
//# sourceMappingURL=DevLoadingView.js.map