158 lines
4.0 KiB
JavaScript
158 lines
4.0 KiB
JavaScript
// @flow
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import React from 'react';
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import { Animated, Text } from 'react-native';
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import { combineStyles, type StyleType } from '../../styles';
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import AbstractCircularLabel, {
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type Props as AbstractProps
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} from './AbstractCircularLabel';
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import styles from './styles';
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/**
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* Const for status string 'in progress'.
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*/
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const STATUS_IN_PROGRESS = 'in_progress';
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/**
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* Const for status string 'off'.
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*/
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const STATUS_OFF = 'off';
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type Props = AbstractProps & {
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/**
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* Status of the label. This prop adds some additional styles based on its
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* value. E.g. if status = off, it will render the label symbolising that
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* the thing it displays (e.g. recording) is off.
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*/
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status: ('in_progress' | 'off' | 'on'),
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/**
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* Style of the label.
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*/
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style?: ?StyleType
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};
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type State = {
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/**
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* An animation object handling the opacity changes of the in progress
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* label.
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*/
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pulseAnimation: Object
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}
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/**
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* Renders a circular indicator to be used for status icons, such as recording
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* on, audio-only conference, video quality and similar.
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*/
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export default class CircularLabel extends AbstractCircularLabel<Props, State> {
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/**
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* A reference to the started animation of this label.
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*/
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animationReference: Object;
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/**
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* Instantiates a new instance of {@code CircularLabel}.
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*
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* @inheritdoc
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*/
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constructor(props: Props) {
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super(props);
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this.state = {
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pulseAnimation: new Animated.Value(0)
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};
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}
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/**
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* Implements {@code Component#componentDidMount}.
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*
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* @inheritdoc
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*/
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componentDidMount() {
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this._maybeToggleAnimation({}, this.props);
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}
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/**
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* Implements {@code Component#componentDidUpdate}.
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*
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* @inheritdoc
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*/
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componentDidUpdate(prevProps: Props) {
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this._maybeToggleAnimation(prevProps, this.props);
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}
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/**
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* Implements React {@link Component}'s render.
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*
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* @inheritdoc
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*/
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render() {
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const { status, label, style } = this.props;
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let extraStyle = null;
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switch (status) {
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case STATUS_IN_PROGRESS:
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extraStyle = {
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opacity: this.state.pulseAnimation
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};
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break;
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case STATUS_OFF:
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extraStyle = styles.labelOff;
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break;
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}
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return (
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<Animated.View
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style = { [
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combineStyles(styles.indicatorContainer, style),
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extraStyle
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] }>
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<Text style = { styles.indicatorText }>
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{ label }
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</Text>
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</Animated.View>
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);
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}
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/**
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* Checks if the animation has to be started or stopped and acts
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* accordingly.
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*
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* @param {Props} oldProps - The previous values of the Props.
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* @param {Props} newProps - The new values of the Props.
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* @returns {void}
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*/
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_maybeToggleAnimation(oldProps, newProps) {
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const { status: oldStatus } = oldProps;
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const { status: newStatus } = newProps;
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const { pulseAnimation } = this.state;
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if (newStatus === STATUS_IN_PROGRESS
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&& oldStatus !== STATUS_IN_PROGRESS) {
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// Animation must be started
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this.animationReference = Animated.loop(Animated.sequence([
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Animated.timing(pulseAnimation, {
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delay: 500,
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toValue: 1,
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useNativeDriver: true
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}),
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Animated.timing(pulseAnimation, {
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toValue: 0.3,
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useNativeDriver: true
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})
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]));
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this.animationReference.start();
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} else if (this.animationReference
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&& newStatus !== STATUS_IN_PROGRESS
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&& oldStatus === STATUS_IN_PROGRESS) {
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// Animation must be stopped
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this.animationReference.stop();
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}
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}
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}
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