ta264
4 years ago
parent
5714f1c913
commit
f884a2689a
@ -0,0 +1,17 @@
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.container {
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position: relative;
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overflow: hidden;
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padding-left: 10px;
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white-space: nowrap;
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/* stylelint-disable-next-line property-no-vendor-prefix */
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-webkit-mask-image: linear-gradient(to right, transparent, $white 10px, $white 90%, transparent), linear-gradient(to left, transparent, $white 10px, $white 90%, transparent);
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mask-image: linear-gradient(to right, transparent, $white 10px, $white 90%, transparent), linear-gradient(to left, transparent, $white 10px, $white 90%, transparent);
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}
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.inner {
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transition: transform var(--duration) ease-in-out;
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}
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.toLeft {
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transform: translateX(var(--distance));
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}
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@ -1,181 +1,144 @@
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import classNames from 'classnames';
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import PropTypes from 'prop-types';
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import React, { Component } from 'react';
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import Measure from './Measure';
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import styles from './Marquee.css';
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const FPS = 20;
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const STEP = 1;
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const TIMEOUT = 1 / FPS * 1000;
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const SPEED = 50; // pixels per second
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class Marquee extends Component {
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static propTypes = {
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text: PropTypes.string,
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title: PropTypes.string,
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hoverToStop: PropTypes.bool,
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loop: PropTypes.bool,
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className: PropTypes.string
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};
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static defaultProps = {
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text: '',
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title: '',
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hoverToStop: true,
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loop: false
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};
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state = {
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animatedWidth: 0,
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overflowWidth: 0,
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direction: 0
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};
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componentDidMount() {
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this.measureText();
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if (this.props.hoverToStop) {
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this.startAnimation();
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}
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//
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// Lifecycle
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constructor(props) {
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super(props);
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this.state = {
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containerWidth: 0,
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overflowWidth: 0,
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animationState: null,
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key: 0
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};
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}
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componentWillReceiveProps(nextProps) {
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if (this.props.text.length !== nextProps.text.length) {
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clearTimeout(this.marqueeTimer);
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this.setState({ animatedWidth: 0, direction: 0 });
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componentDidUpdate(prevProps) {
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if (this.props.text !== prevProps.text) {
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// reset the component, set a new key to force re-render so new text isn't in old position
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this.setState({
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overflowWidth: 0,
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animationState: null,
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key: this.state.key + 1
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});
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return;
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}
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}
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componentDidUpdate() {
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this.measureText();
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const containerWidth = this.state.containerWidth;
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const node = this.text;
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if (containerWidth && node) {
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const textWidth = node.offsetWidth;
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// eslint-disable-next-line no-bitwise
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const overflowWidth = (textWidth - containerWidth + 10) | 0; // 10 margin, round towards 0
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if (overflowWidth !== this.state.overflowWidth) {
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const triggerUpdate = overflowWidth > 0 && this.state.overflowWidth === 0;
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if (this.props.hoverToStop) {
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this.startAnimation();
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this.setState({ overflowWidth }, () => {
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if (triggerUpdate) {
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this.onHandleMouseEnter();
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}
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});
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}
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}
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}
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componentWillUnmount() {
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clearTimeout(this.marqueeTimer);
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}
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//
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// Listeners
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onHandleMouseEnter = () => {
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if (this.props.hoverToStop) {
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clearTimeout(this.marqueeTimer);
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} else if (this.state.overflowWidth > 0) {
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this.startAnimation();
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}
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}
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const {
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animationState,
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overflowWidth
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} = this.state;
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onHandleMouseLeave = () => {
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if (this.props.hoverToStop && this.state.overflowWidth > 0) {
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this.startAnimation();
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} else {
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clearTimeout(this.marqueeTimer);
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this.setState({ animatedWidth: 0 });
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if (animationState === null && overflowWidth > 0) {
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this.setState({ animationState: 'toLeft' });
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}
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}
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startAnimation = () => {
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clearTimeout(this.marqueeTimer);
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const isLeading = this.state.animatedWidth === 0;
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const timeout = isLeading ? 0 : TIMEOUT;
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const animate = () => {
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const { overflowWidth } = this.state;
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let animatedWidth = this.state.animatedWidth;
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let direction = this.state.direction;
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if (direction === 0) {
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animatedWidth = this.state.animatedWidth + STEP;
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} else {
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animatedWidth = this.state.animatedWidth - STEP;
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}
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const isRoundOver = animatedWidth < 0;
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const endOfText = animatedWidth > overflowWidth;
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onTransitionEnd = (payload) => {
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const {
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animationState
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} = this.state;
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if (endOfText) {
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direction = direction === 1;
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}
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if (isRoundOver) {
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if (this.props.loop) {
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direction = direction === 0;
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} else {
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return;
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}
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}
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if (animationState === 'toLeft') {
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this.setState({ animationState: 'toRight' });
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}
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this.setState({ animatedWidth, direction });
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this.marqueeTimer = setTimeout(animate, TIMEOUT);
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};
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if (animationState === 'toRight') {
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this.setState({ animationState: null });
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}
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}
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this.marqueeTimer = setTimeout(animate, timeout);
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onContainerMeasure = ({ width }) => {
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this.setState({ containerWidth: width });
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}
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measureText = () => {
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const container = this.container;
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const node = this.text;
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//
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// Render
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if (container && node) {
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const containerWidth = container.offsetWidth;
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const textWidth = node.offsetWidth;
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const overflowWidth = textWidth - containerWidth;
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render() {
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const {
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text
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} = this.props;
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if (overflowWidth !== this.state.overflowWidth) {
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this.setState({ overflowWidth });
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}
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}
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}
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const {
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key,
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overflowWidth,
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animationState
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} = this.state;
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const moveDist = -overflowWidth - 10;
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const duration = -moveDist / SPEED;
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render() {
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const style = {
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position: 'relative',
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right: this.state.animatedWidth,
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whiteSpace: 'nowrap'
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'--duration': `${duration}s`,
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'--distance': `${moveDist}px`
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};
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if (this.state.overflowWidth < 0) {
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return (
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return (
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<Measure
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key={key}
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className={styles.container}
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onMeasure={this.onContainerMeasure}
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onMouseEnter={this.onHandleMouseEnter}
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onTouchStart={this.onHandleMouseEnter}
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>
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<div
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ref={(el) => {
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this.container = el;
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}}
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className={`ui-marquee ${this.props.className}`}
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style={{ overflow: 'hidden' }}
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className={classNames(
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styles.inner,
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animationState === 'toLeft' && styles.toLeft
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)}
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style={style}
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onTransitionEnd={this.onTransitionEnd}
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>
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<span
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ref={(el) => {
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this.text = el;
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}}
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style={style}
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title={(this.props.title && (this.props.text !== this.props.title)) ? `Original Title: ${this.props.title}` : this.props.text}
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title={text}
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>
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{this.props.text}
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{text}
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</span>
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</div>
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);
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}
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return (
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<div
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ref={(el) => {
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this.container = el;
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}}
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className={`ui-marquee ${this.props.className}`.trim()}
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style={{ overflow: 'hidden' }}
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onMouseEnter={this.onHandleMouseEnter}
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onMouseLeave={this.onHandleMouseLeave}
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>
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<span
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ref={(el) => {
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this.text = el;
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}}
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style={style}
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title={(this.props.title && (this.props.text !== this.props.title)) ? `Original Title: ${this.props.title}` : this.props.text}
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>
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{this.props.text}
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</span>
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</div>
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</Measure>
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);
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}
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}
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Marquee.propTypes = {
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text: PropTypes.string.isRequired
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};
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export default Marquee;
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