Generalized the infinite scrollable list (#4697)
This commit is contained in:
abcang
Eugen Rochko
parent
938cd2875b
commit
0827c09c44
8 changed files with 376 additions and 320 deletions
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@ -26,6 +26,7 @@ export default class Account extends ImmutablePureComponent {
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onBlock: PropTypes.func.isRequired,
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onMute: PropTypes.func.isRequired,
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intl: PropTypes.object.isRequired,
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hidden: PropTypes.bool,
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};
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handleFollow = () => {
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@ -41,12 +42,21 @@ export default class Account extends ImmutablePureComponent {
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}
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render () {
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const { account, me, intl } = this.props;
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const { account, me, intl, hidden } = this.props;
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if (!account) {
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return <div />;
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}
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if (hidden) {
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return (
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<div>
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{account.get('display_name')}
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{account.get('username')}
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</div>
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);
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}
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let buttons;
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if (account.get('id') !== me && account.get('relationship', null) !== null) {
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@ -0,0 +1,122 @@
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import React from 'react';
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import PropTypes from 'prop-types';
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import ImmutablePureComponent from 'react-immutable-pure-component';
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import scheduleIdleTask from '../features/ui/util/schedule_idle_task';
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import getRectFromEntry from '../features/ui/util/get_rect_from_entry';
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export default class IntersectionObserverArticle extends ImmutablePureComponent {
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static propTypes = {
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intersectionObserverWrapper: PropTypes.object,
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id: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
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index: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
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listLength: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
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children: PropTypes.node,
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};
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state = {
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isHidden: false, // set to true in requestIdleCallback to trigger un-render
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}
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shouldComponentUpdate (nextProps, nextState) {
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if (!nextState.isIntersecting && nextState.isHidden) {
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// It's only if we're not intersecting (i.e. offscreen) and isHidden is true
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// that either "isIntersecting" or "isHidden" matter, and then they're
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// the only things that matter (and updated ARIA attributes).
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return this.state.isIntersecting || !this.state.isHidden || nextProps.listLength !== this.props.listLength;
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} else if (nextState.isIntersecting && !this.state.isIntersecting) {
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// If we're going from a non-intersecting state to an intersecting state,
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// (i.e. offscreen to onscreen), then we definitely need to re-render
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return true;
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}
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// Otherwise, diff based on "updateOnProps" and "updateOnStates"
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return super.shouldComponentUpdate(nextProps, nextState);
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}
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componentDidMount () {
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if (!this.props.intersectionObserverWrapper) {
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// TODO: enable IntersectionObserver optimization for notification statuses.
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// These are managed in notifications/index.js rather than status_list.js
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return;
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}
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this.props.intersectionObserverWrapper.observe(
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this.props.id,
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this.node,
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this.handleIntersection
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);
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this.componentMounted = true;
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}
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componentWillUnmount () {
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if (this.props.intersectionObserverWrapper) {
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this.props.intersectionObserverWrapper.unobserve(this.props.id, this.node);
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}
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this.componentMounted = false;
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}
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handleIntersection = (entry) => {
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if (this.node && this.node.children.length !== 0) {
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// save the height of the fully-rendered element
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this.height = getRectFromEntry(entry).height;
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if (this.props.onHeightChange) {
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this.props.onHeightChange(this.props.status, this.height);
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}
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}
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this.setState((prevState) => {
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if (prevState.isIntersecting && !entry.isIntersecting) {
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scheduleIdleTask(this.hideIfNotIntersecting);
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}
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return {
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isIntersecting: entry.isIntersecting,
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isHidden: false,
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};
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});
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}
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hideIfNotIntersecting = () => {
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if (!this.componentMounted) {
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return;
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}
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// When the browser gets a chance, test if we're still not intersecting,
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// and if so, set our isHidden to true to trigger an unrender. The point of
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// this is to save DOM nodes and avoid using up too much memory.
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// See: https://github.com/tootsuite/mastodon/issues/2900
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this.setState((prevState) => ({ isHidden: !prevState.isIntersecting }));
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}
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handleRef = (node) => {
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this.node = node;
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}
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render () {
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const { children, id, index, listLength } = this.props;
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const { isIntersecting, isHidden } = this.state;
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if (!isIntersecting && isHidden) {
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return (
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<article
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ref={this.handleRef}
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aria-posinset={index}
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aria-setsize={listLength}
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style={{ height: `${this.height}px`, opacity: 0, overflow: 'hidden' }}
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data-id={id}
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tabIndex='0'
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>
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{children && React.cloneElement(children, { hidden: true })}
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</article>
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);
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}
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return (
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<article ref={this.handleRef} aria-posinset={index} aria-setsize={listLength} data-id={id} tabIndex='0'>
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{children && React.cloneElement(children, { hidden: false })}
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</article>
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);
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}
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}
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179
app/javascript/mastodon/components/scrollable_list.js
Normal file
179
app/javascript/mastodon/components/scrollable_list.js
Normal file
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@ -0,0 +1,179 @@
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import React, { PureComponent } from 'react';
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import { ScrollContainer } from 'react-router-scroll';
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import PropTypes from 'prop-types';
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import IntersectionObserverArticle from './intersection_observer_article';
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import LoadMore from './load_more';
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import IntersectionObserverWrapper from '../features/ui/util/intersection_observer_wrapper';
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import { throttle } from 'lodash';
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export default class ScrollableList extends PureComponent {
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static propTypes = {
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scrollKey: PropTypes.string.isRequired,
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onScrollToBottom: PropTypes.func,
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onScrollToTop: PropTypes.func,
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onScroll: PropTypes.func,
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trackScroll: PropTypes.bool,
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shouldUpdateScroll: PropTypes.func,
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isLoading: PropTypes.bool,
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hasMore: PropTypes.bool,
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prepend: PropTypes.node,
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emptyMessage: PropTypes.node,
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children: PropTypes.node,
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};
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static defaultProps = {
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trackScroll: true,
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};
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intersectionObserverWrapper = new IntersectionObserverWrapper();
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handleScroll = throttle(() => {
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if (this.node) {
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const { scrollTop, scrollHeight, clientHeight } = this.node;
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const offset = scrollHeight - scrollTop - clientHeight;
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this._oldScrollPosition = scrollHeight - scrollTop;
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if (400 > offset && this.props.onScrollToBottom && !this.props.isLoading) {
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this.props.onScrollToBottom();
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} else if (scrollTop < 100 && this.props.onScrollToTop) {
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this.props.onScrollToTop();
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} else if (this.props.onScroll) {
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this.props.onScroll();
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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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componentDidMount () {
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this.attachScrollListener();
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this.attachIntersectionObserver();
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// Handle initial scroll posiiton
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this.handleScroll();
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}
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componentDidUpdate (prevProps) {
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// Reset the scroll position when a new child comes in in order not to
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// jerk the scrollbar around if you're already scrolled down the page.
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if (React.Children.count(prevProps.children) < React.Children.count(this.props.children) && this._oldScrollPosition && this.node.scrollTop > 0) {
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if (this.getFirstChildKey(prevProps) !== this.getFirstChildKey(this.props)) {
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const newScrollTop = this.node.scrollHeight - this._oldScrollPosition;
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if (this.node.scrollTop !== newScrollTop) {
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this.node.scrollTop = newScrollTop;
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}
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} else {
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this._oldScrollPosition = this.node.scrollHeight - this.node.scrollTop;
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}
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}
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}
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componentWillUnmount () {
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this.detachScrollListener();
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this.detachIntersectionObserver();
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}
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attachIntersectionObserver () {
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this.intersectionObserverWrapper.connect({
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root: this.node,
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rootMargin: '300% 0px',
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});
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}
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detachIntersectionObserver () {
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this.intersectionObserverWrapper.disconnect();
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}
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attachScrollListener () {
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this.node.addEventListener('scroll', this.handleScroll);
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}
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detachScrollListener () {
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this.node.removeEventListener('scroll', this.handleScroll);
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}
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getFirstChildKey (props) {
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const { children } = props;
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const firstChild = Array.isArray(children) ? children[0] : children;
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return firstChild && firstChild.key;
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}
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setRef = (c) => {
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this.node = c;
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}
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handleLoadMore = (e) => {
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e.preventDefault();
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this.props.onScrollToBottom();
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}
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handleKeyDown = (e) => {
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if (['PageDown', 'PageUp'].includes(e.key) || (e.ctrlKey && ['End', 'Home'].includes(e.key))) {
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const article = (() => {
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switch (e.key) {
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case 'PageDown':
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return e.target.nodeName === 'ARTICLE' && e.target.nextElementSibling;
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case 'PageUp':
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return e.target.nodeName === 'ARTICLE' && e.target.previousElementSibling;
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case 'End':
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return this.node.querySelector('[role="feed"] > article:last-of-type');
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case 'Home':
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return this.node.querySelector('[role="feed"] > article:first-of-type');
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default:
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return null;
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}
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})();
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if (article) {
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e.preventDefault();
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article.focus();
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article.scrollIntoView();
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}
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}
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}
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render () {
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const { children, scrollKey, trackScroll, shouldUpdateScroll, isLoading, hasMore, prepend, emptyMessage } = this.props;
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const childrenCount = React.Children.count(children);
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const loadMore = <LoadMore visible={!isLoading && childrenCount > 0 && hasMore} onClick={this.handleLoadMore} />;
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let scrollableArea = null;
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if (isLoading || childrenCount > 0 || !emptyMessage) {
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scrollableArea = (
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<div className='scrollable' ref={this.setRef}>
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<div role='feed' className='item-list' onKeyDown={this.handleKeyDown}>
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{prepend}
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{React.Children.map(this.props.children, (child, index) => (
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<IntersectionObserverArticle key={child.key} id={child.key} index={index} listLength={childrenCount} intersectionObserverWrapper={this.intersectionObserverWrapper}>
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{child}
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</IntersectionObserverArticle>
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))}
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{loadMore}
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</div>
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</div>
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);
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} else {
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scrollableArea = (
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<div className='empty-column-indicator' ref={this.setRef}>
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{emptyMessage}
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</div>
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);
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}
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if (trackScroll) {
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return (
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<ScrollContainer scrollKey={scrollKey} shouldUpdateScroll={shouldUpdateScroll}>
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{scrollableArea}
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</ScrollContainer>
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);
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} else {
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return scrollableArea;
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}
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}
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}
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@ -9,13 +9,11 @@ import StatusContent from './status_content';
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import StatusActionBar from './status_action_bar';
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import { FormattedMessage } from 'react-intl';
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import ImmutablePureComponent from 'react-immutable-pure-component';
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import scheduleIdleTask from '../features/ui/util/schedule_idle_task';
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import { MediaGallery, VideoPlayer } from '../features/ui/util/async-components';
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// We use the component (and not the container) since we do not want
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// to use the progress bar to show download progress
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import Bundle from '../features/ui/components/bundle';
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import getRectFromEntry from '../features/ui/util/get_rect_from_entry';
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export default class Status extends ImmutablePureComponent {
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@ -26,7 +24,6 @@ export default class Status extends ImmutablePureComponent {
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static propTypes = {
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status: ImmutablePropTypes.map,
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account: ImmutablePropTypes.map,
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wrapped: PropTypes.bool,
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onReply: PropTypes.func,
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onFavourite: PropTypes.func,
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onReblog: PropTypes.func,
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@ -40,14 +37,11 @@ export default class Status extends ImmutablePureComponent {
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boostModal: PropTypes.bool,
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autoPlayGif: PropTypes.bool,
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muted: PropTypes.bool,
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intersectionObserverWrapper: PropTypes.object,
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index: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
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listLength: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
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hidden: PropTypes.bool,
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};
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state = {
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isExpanded: false,
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isHidden: false, // set to true in requestIdleCallback to trigger un-render
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}
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// Avoid checking props that are functions (and whose equality will always
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@ -55,91 +49,15 @@ export default class Status extends ImmutablePureComponent {
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updateOnProps = [
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'status',
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'account',
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'wrapped',
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'me',
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'boostModal',
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'autoPlayGif',
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'muted',
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'listLength',
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'hidden',
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]
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updateOnStates = ['isExpanded']
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shouldComponentUpdate (nextProps, nextState) {
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if (!nextState.isIntersecting && nextState.isHidden) {
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// It's only if we're not intersecting (i.e. offscreen) and isHidden is true
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// that either "isIntersecting" or "isHidden" matter, and then they're
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// the only things that matter (and updated ARIA attributes).
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return this.state.isIntersecting || !this.state.isHidden || nextProps.listLength !== this.props.listLength;
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} else if (nextState.isIntersecting && !this.state.isIntersecting) {
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// If we're going from a non-intersecting state to an intersecting state,
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// (i.e. offscreen to onscreen), then we definitely need to re-render
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return true;
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}
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// Otherwise, diff based on "updateOnProps" and "updateOnStates"
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return super.shouldComponentUpdate(nextProps, nextState);
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}
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componentDidMount () {
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if (!this.props.intersectionObserverWrapper) {
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// TODO: enable IntersectionObserver optimization for notification statuses.
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// These are managed in notifications/index.js rather than status_list.js
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return;
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}
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this.props.intersectionObserverWrapper.observe(
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this.props.id,
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this.node,
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this.handleIntersection
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);
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this.componentMounted = true;
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}
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componentWillUnmount () {
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if (this.props.intersectionObserverWrapper) {
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this.props.intersectionObserverWrapper.unobserve(this.props.id, this.node);
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}
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this.componentMounted = false;
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}
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handleIntersection = (entry) => {
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if (this.node && this.node.children.length !== 0) {
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// save the height of the fully-rendered element
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this.height = getRectFromEntry(entry).height;
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if (this.props.onHeightChange) {
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this.props.onHeightChange(this.props.status, this.height);
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}
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}
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this.setState((prevState) => {
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if (prevState.isIntersecting && !entry.isIntersecting) {
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scheduleIdleTask(this.hideIfNotIntersecting);
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}
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return {
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isIntersecting: entry.isIntersecting,
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isHidden: false,
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};
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});
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}
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hideIfNotIntersecting = () => {
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if (!this.componentMounted) {
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return;
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}
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// When the browser gets a chance, test if we're still not intersecting,
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// and if so, set our isHidden to true to trigger an unrender. The point of
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// this is to save DOM nodes and avoid using up too much memory.
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// See: https://github.com/tootsuite/mastodon/issues/2900
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this.setState((prevState) => ({ isHidden: !prevState.isIntersecting }));
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}
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handleRef = (node) => {
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this.node = node;
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}
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handleClick = () => {
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if (!this.context.router) {
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return;
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@ -173,25 +91,19 @@ export default class Status extends ImmutablePureComponent {
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let media = null;
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let statusAvatar;
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// Exclude intersectionObserverWrapper from `other` variable
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// because intersection is managed in here.
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const { status, account, intersectionObserverWrapper, index, listLength, wrapped, ...other } = this.props;
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const { isExpanded, isIntersecting, isHidden } = this.state;
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const { status, account, hidden, ...other } = this.props;
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const { isExpanded } = this.state;
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if (status === null) {
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return null;
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}
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const hasIntersectionObserverWrapper = !!this.props.intersectionObserverWrapper;
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const isHiddenForSure = isIntersecting === false && isHidden;
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const visibilityUnknownButHeightIsCached = isIntersecting === undefined && status.has('height');
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||||
|
||||
if (hasIntersectionObserverWrapper && (isHiddenForSure || visibilityUnknownButHeightIsCached)) {
|
||||
if (hidden) {
|
||||
return (
|
||||
<article ref={this.handleRef} data-id={status.get('id')} aria-posinset={index} aria-setsize={listLength} tabIndex='0' style={{ height: `${this.height || status.get('height')}px`, opacity: 0, overflow: 'hidden' }}>
|
||||
<div>
|
||||
{status.getIn(['account', 'display_name']) || status.getIn(['account', 'username'])}
|
||||
{status.get('content')}
|
||||
</article>
|
||||
</div>
|
||||
);
|
||||
}
|
||||
|
||||
|
|
@ -199,14 +111,14 @@ export default class Status extends ImmutablePureComponent {
|
|||
const display_name_html = { __html: status.getIn(['account', 'display_name_html']) };
|
||||
|
||||
return (
|
||||
<article className='status__wrapper' ref={this.handleRef} data-id={status.get('id')} aria-posinset={index} aria-setsize={listLength} tabIndex='0'>
|
||||
<div className='status__wrapper' data-id={status.get('id')} >
|
||||
<div className='status__prepend'>
|
||||
<div className='status__prepend-icon-wrapper'><i className='fa fa-fw fa-retweet status__prepend-icon' /></div>
|
||||
<FormattedMessage id='status.reblogged_by' defaultMessage='{name} boosted' values={{ name: <a onClick={this.handleAccountClick} data-id={status.getIn(['account', 'id'])} href={status.getIn(['account', 'url'])} className='status__display-name muted'><strong dangerouslySetInnerHTML={display_name_html} /></a> }} />
|
||||
</div>
|
||||
|
||||
<Status {...other} wrapped status={status.get('reblog')} account={status.get('account')} />
|
||||
</article>
|
||||
<Status {...other} status={status.get('reblog')} account={status.get('account')} />
|
||||
</div>
|
||||
);
|
||||
}
|
||||
|
||||
|
|
@ -235,7 +147,7 @@ export default class Status extends ImmutablePureComponent {
|
|||
}
|
||||
|
||||
return (
|
||||
<article aria-posinset={index} aria-setsize={listLength} className={`status ${this.props.muted ? 'muted' : ''} status-${status.get('visibility')}`} data-id={status.get('id')} tabIndex={wrapped ? null : '0'} ref={this.handleRef}>
|
||||
<div className={`status ${this.props.muted ? 'muted' : ''} status-${status.get('visibility')}`} data-id={status.get('id')}>
|
||||
<div className='status__info'>
|
||||
<a href={status.get('url')} className='status__relative-time' target='_blank' rel='noopener'><RelativeTimestamp timestamp={status.get('created_at')} /></a>
|
||||
|
||||
|
|
@ -253,7 +165,7 @@ export default class Status extends ImmutablePureComponent {
|
|||
{media}
|
||||
|
||||
<StatusActionBar {...this.props} />
|
||||
</article>
|
||||
</div>
|
||||
);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,12 +1,9 @@
|
|||
import React from 'react';
|
||||
import ImmutablePropTypes from 'react-immutable-proptypes';
|
||||
import { ScrollContainer } from 'react-router-scroll';
|
||||
import PropTypes from 'prop-types';
|
||||
import StatusContainer from '../containers/status_container';
|
||||
import LoadMore from './load_more';
|
||||
import ImmutablePureComponent from 'react-immutable-pure-component';
|
||||
import IntersectionObserverWrapper from '../features/ui/util/intersection_observer_wrapper';
|
||||
import { throttle } from 'lodash';
|
||||
import ScrollableList from './scrollable_list';
|
||||
|
||||
export default class StatusList extends ImmutablePureComponent {
|
||||
|
||||
|
|
@ -28,145 +25,21 @@ export default class StatusList extends ImmutablePureComponent {
|
|||
trackScroll: true,
|
||||
};
|
||||
|
||||
intersectionObserverWrapper = new IntersectionObserverWrapper();
|
||||
|
||||
handleScroll = throttle(() => {
|
||||
if (this.node) {
|
||||
const { scrollTop, scrollHeight, clientHeight } = this.node;
|
||||
const offset = scrollHeight - scrollTop - clientHeight;
|
||||
this._oldScrollPosition = scrollHeight - scrollTop;
|
||||
|
||||
if (400 > offset && this.props.onScrollToBottom && !this.props.isLoading) {
|
||||
this.props.onScrollToBottom();
|
||||
} else if (scrollTop < 100 && this.props.onScrollToTop) {
|
||||
this.props.onScrollToTop();
|
||||
} else if (this.props.onScroll) {
|
||||
this.props.onScroll();
|
||||
}
|
||||
}
|
||||
}, 150, {
|
||||
trailing: true,
|
||||
});
|
||||
|
||||
componentDidMount () {
|
||||
this.attachScrollListener();
|
||||
this.attachIntersectionObserver();
|
||||
|
||||
// Handle initial scroll posiiton
|
||||
this.handleScroll();
|
||||
}
|
||||
|
||||
componentDidUpdate (prevProps) {
|
||||
// Reset the scroll position when a new toot comes in in order not to
|
||||
// jerk the scrollbar around if you're already scrolled down the page.
|
||||
if (prevProps.statusIds.size < this.props.statusIds.size && this._oldScrollPosition && this.node.scrollTop > 0) {
|
||||
if (prevProps.statusIds.first() !== this.props.statusIds.first()) {
|
||||
let newScrollTop = this.node.scrollHeight - this._oldScrollPosition;
|
||||
if (this.node.scrollTop !== newScrollTop) {
|
||||
this.node.scrollTop = newScrollTop;
|
||||
}
|
||||
} else {
|
||||
this._oldScrollPosition = this.node.scrollHeight - this.node.scrollTop;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
componentWillUnmount () {
|
||||
this.detachScrollListener();
|
||||
this.detachIntersectionObserver();
|
||||
}
|
||||
|
||||
attachIntersectionObserver () {
|
||||
this.intersectionObserverWrapper.connect({
|
||||
root: this.node,
|
||||
rootMargin: '300% 0px',
|
||||
});
|
||||
}
|
||||
|
||||
detachIntersectionObserver () {
|
||||
this.intersectionObserverWrapper.disconnect();
|
||||
}
|
||||
|
||||
attachScrollListener () {
|
||||
this.node.addEventListener('scroll', this.handleScroll);
|
||||
}
|
||||
|
||||
detachScrollListener () {
|
||||
this.node.removeEventListener('scroll', this.handleScroll);
|
||||
}
|
||||
|
||||
setRef = (c) => {
|
||||
this.node = c;
|
||||
}
|
||||
|
||||
handleLoadMore = (e) => {
|
||||
e.preventDefault();
|
||||
this.props.onScrollToBottom();
|
||||
}
|
||||
|
||||
handleKeyDown = (e) => {
|
||||
if (['PageDown', 'PageUp'].includes(e.key) || (e.ctrlKey && ['End', 'Home'].includes(e.key))) {
|
||||
const article = (() => {
|
||||
switch (e.key) {
|
||||
case 'PageDown':
|
||||
return e.target.nodeName === 'ARTICLE' && e.target.nextElementSibling;
|
||||
case 'PageUp':
|
||||
return e.target.nodeName === 'ARTICLE' && e.target.previousElementSibling;
|
||||
case 'End':
|
||||
return this.node.querySelector('[role="feed"] > article:last-of-type');
|
||||
case 'Home':
|
||||
return this.node.querySelector('[role="feed"] > article:first-of-type');
|
||||
default:
|
||||
return null;
|
||||
}
|
||||
})();
|
||||
|
||||
|
||||
if (article) {
|
||||
e.preventDefault();
|
||||
article.focus();
|
||||
article.scrollIntoView();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
render () {
|
||||
const { statusIds, scrollKey, trackScroll, shouldUpdateScroll, isLoading, hasMore, prepend, emptyMessage } = this.props;
|
||||
const { statusIds, ...other } = this.props;
|
||||
const { isLoading } = other;
|
||||
|
||||
const loadMore = <LoadMore visible={!isLoading && statusIds.size > 0 && hasMore} onClick={this.handleLoadMore} />;
|
||||
let scrollableArea = null;
|
||||
const scrollableContent = (isLoading || statusIds.size > 0) ? (
|
||||
statusIds.map((statusId) => (
|
||||
<StatusContainer key={statusId} id={statusId} />
|
||||
))
|
||||
) : null;
|
||||
|
||||
if (isLoading || statusIds.size > 0 || !emptyMessage) {
|
||||
scrollableArea = (
|
||||
<div className='scrollable' ref={this.setRef}>
|
||||
<div role='feed' className='status-list' onKeyDown={this.handleKeyDown}>
|
||||
{prepend}
|
||||
|
||||
{statusIds.map((statusId, index) => {
|
||||
return <StatusContainer key={statusId} id={statusId} index={index} listLength={statusIds.size} intersectionObserverWrapper={this.intersectionObserverWrapper} />;
|
||||
})}
|
||||
|
||||
{loadMore}
|
||||
</div>
|
||||
</div>
|
||||
);
|
||||
} else {
|
||||
scrollableArea = (
|
||||
<div className='empty-column-indicator' ref={this.setRef}>
|
||||
{emptyMessage}
|
||||
</div>
|
||||
);
|
||||
}
|
||||
|
||||
if (trackScroll) {
|
||||
return (
|
||||
<ScrollContainer scrollKey={scrollKey} shouldUpdateScroll={shouldUpdateScroll}>
|
||||
{scrollableArea}
|
||||
</ScrollContainer>
|
||||
);
|
||||
} else {
|
||||
return scrollableArea;
|
||||
}
|
||||
return (
|
||||
<ScrollableList {...other}>
|
||||
{scrollableContent}
|
||||
</ScrollableList>
|
||||
);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue