125 lines
3.1 KiB
JavaScript
125 lines
3.1 KiB
JavaScript
import { FormattedMessage } from 'react-intl'
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import throttle from 'lodash.throttle'
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import classNames from 'classnames/bind'
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import { shortNumberFormat } from '../utils/numbers'
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import { scrollTo } from '../utils/scroll_to'
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import Button from './button'
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import Text from './text'
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const cx = classNames.bind(_s)
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export default class TimelineQueueButtonHeader extends PureComponent {
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static propTypes = {
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onClick: PropTypes.func.isRequired,
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count: PropTypes.number,
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itemType: PropTypes.string,
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floating: PropTypes.bool,
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}
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static defaultProps = {
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count: 0,
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itemType: 'item',
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}
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state = {
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onVisibleOffset: 0,
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hidden: false,
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}
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componentDidMount() {
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this.window = window
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this.documentElement = document.scrollingElement || document.documentElement
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}
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componentWillUnmount() {
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this.detachScrollListener()
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}
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componentDidUpdate (prevProps) {
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if (this.props.count > 0 && prevProps.count === 0) {
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// Init
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this.window.addEventListener('scroll', this.handleScroll)
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this.setState({ onVisibleOffset: this.documentElement.scrollTop })
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} else if (prevProps.count > 0 && this.props.count === 0) {
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// Deinit
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this.detachScrollListener()
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this.setState({
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hidden: false,
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onVisibleOffset: 0,
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})
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}
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}
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detachScrollListener = () => {
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this.window.removeEventListener('scroll', this.handleScroll)
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}
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handleScroll = throttle(() => {
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if (this.window) {
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const { scrollTop } = this.documentElement
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const { hidden, onVisibleOffset } = this.state
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const { count } = this.props
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const min = Math.min(onVisibleOffset, scrollTop)
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const max = Math.max(onVisibleOffset, scrollTop)
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const delta = max - min
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const trigger = 50
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// If visible and scrolled a bit, hide it
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if (delta > trigger && count > 0 && !hidden) {
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this.setState({ hidden: true })
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this.detachScrollListener()
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}
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}
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}, 150, {
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trailing: true,
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})
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handleOnClick = () => {
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scrollTo(document.documentElement, 0, 500)
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this.props.onClick()
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}
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render() {
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const { count, itemType } = this.props
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const { hidden } = this.state
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const hasItems = count > 0
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const classes = cx({
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default: 1,
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displayNone: (!hasItems || hidden),
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mtNeg26PX: 1,
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})
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return (
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<div className={[_s.default, _s.pb5, _s.posSticky, _s.top120PX, _s.alignItemsCenter, _s.z3].join(' ')}>
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<div className={classes}>
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<Button
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isNarrow
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color='white'
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backgroundColor='brand'
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onClick={this.handleOnClick}
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>
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{
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hasItems && !hidden &&
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<Text color='inherit' size='small'>
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<FormattedMessage
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id='timeline_queue.label'
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defaultMessage='{count} new {type}'
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values={{
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count: shortNumberFormat(count),
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type: count === 1 ? itemType : `${itemType}s`,
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}}
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/>
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</Text>
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}
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</Button>
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</div>
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</div>
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)
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}
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} |