react-native/Libraries/Components/ActivityIndicator/ActivityIndicator.js

139 lines
3.3 KiB
JavaScript

/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @format
* @flow
*/
'use strict';
const Platform = require('Platform');
const React = require('React');
const StyleSheet = require('StyleSheet');
const View = require('View');
const requireNativeComponent = require('requireNativeComponent');
import type {NativeComponent} from 'ReactNative';
import type {ViewProps} from 'ViewPropTypes';
const RCTActivityIndicator =
Platform.OS === 'android'
? require('ProgressBarAndroid')
: requireNativeComponent('RCTActivityIndicatorView');
const GRAY = '#999999';
type IndicatorSize = number | 'small' | 'large';
type IOSProps = $ReadOnly<{|
/**
* Whether the indicator should hide when not animating (true by default).
*
* See http://facebook.github.io/react-native/docs/activityindicator.html#hideswhenstopped
*/
hidesWhenStopped?: ?boolean,
|}>;
type Props = $ReadOnly<{|
...ViewProps,
...IOSProps,
/**
* Whether to show the indicator (true, the default) or hide it (false).
*
* See http://facebook.github.io/react-native/docs/activityindicator.html#animating
*/
animating?: ?boolean,
/**
* The foreground color of the spinner (default is gray).
*
* See http://facebook.github.io/react-native/docs/activityindicator.html#color
*/
color?: ?string,
/**
* Size of the indicator (default is 'small').
* Passing a number to the size prop is only supported on Android.
*
* See http://facebook.github.io/react-native/docs/activityindicator.html#size
*/
size?: ?IndicatorSize,
|}>;
/**
* Displays a circular loading indicator.
*
* See http://facebook.github.io/react-native/docs/activityindicator.html
*/
const ActivityIndicator = (
props: Props,
forwardedRef?: ?React.Ref<'RCTActivityIndicatorView'>,
) => {
const {onLayout, style, ...restProps} = props;
let sizeStyle;
switch (props.size) {
case 'small':
sizeStyle = styles.sizeSmall;
break;
case 'large':
sizeStyle = styles.sizeLarge;
break;
default:
sizeStyle = {height: props.size, width: props.size};
break;
}
const nativeProps = {
...restProps,
ref: forwardedRef,
style: sizeStyle,
styleAttr: 'Normal',
indeterminate: true,
};
return (
<View
onLayout={onLayout}
style={StyleSheet.compose(
styles.container,
style,
)}>
{/* $FlowFixMe(>=0.78.0 site=react_native_android_fb) This issue was
* found when making Flow check .android.js files. */}
<RCTActivityIndicator {...nativeProps} />
</View>
);
};
// $FlowFixMe - TODO T29156721 `React.forwardRef` is not defined in Flow, yet.
const ActivityIndicatorWithRef = React.forwardRef(ActivityIndicator);
ActivityIndicatorWithRef.defaultProps = {
animating: true,
color: Platform.OS === 'ios' ? GRAY : null,
hidesWhenStopped: true,
size: 'small',
};
const styles = StyleSheet.create({
container: {
alignItems: 'center',
justifyContent: 'center',
},
sizeSmall: {
width: 20,
height: 20,
},
sizeLarge: {
width: 36,
height: 36,
},
});
module.exports = (ActivityIndicatorWithRef: Class<NativeComponent<Props>>);