chuckya/app/javascript/mastodon/components/status.js
Sorin Davidoi 8eb6d171e6 feat: Cache status height to avoid expensive renders (#4439)
* feat: Cache status height to avoid expensive renders

* feat: Escape content and emojify in reducers

* fix(css): Remove backface-visibility: hidden from .scrollable

* fix(statuses): Avoid creating DOMParses inside a loop
2017-08-07 20:32:03 +02:00

259 lines
9.7 KiB
JavaScript

import React from 'react';
import ImmutablePropTypes from 'react-immutable-proptypes';
import PropTypes from 'prop-types';
import Avatar from './avatar';
import AvatarOverlay from './avatar_overlay';
import RelativeTimestamp from './relative_timestamp';
import DisplayName from './display_name';
import StatusContent from './status_content';
import StatusActionBar from './status_action_bar';
import { FormattedMessage } from 'react-intl';
import ImmutablePureComponent from 'react-immutable-pure-component';
import scheduleIdleTask from '../features/ui/util/schedule_idle_task';
import { MediaGallery, VideoPlayer } from '../features/ui/util/async-components';
// We use the component (and not the container) since we do not want
// to use the progress bar to show download progress
import Bundle from '../features/ui/components/bundle';
import getRectFromEntry from '../features/ui/util/get_rect_from_entry';
export default class Status extends ImmutablePureComponent {
static contextTypes = {
router: PropTypes.object,
};
static propTypes = {
status: ImmutablePropTypes.map,
account: ImmutablePropTypes.map,
wrapped: PropTypes.bool,
onReply: PropTypes.func,
onFavourite: PropTypes.func,
onReblog: PropTypes.func,
onDelete: PropTypes.func,
onOpenMedia: PropTypes.func,
onOpenVideo: PropTypes.func,
onBlock: PropTypes.func,
onHeightChange: PropTypes.func,
me: PropTypes.number,
boostModal: PropTypes.bool,
autoPlayGif: PropTypes.bool,
muted: PropTypes.bool,
intersectionObserverWrapper: PropTypes.object,
index: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
listLength: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
};
state = {
isExpanded: false,
isHidden: false, // set to true in requestIdleCallback to trigger un-render
}
// Avoid checking props that are functions (and whose equality will always
// evaluate to false. See react-immutable-pure-component for usage.
updateOnProps = [
'status',
'account',
'wrapped',
'me',
'boostModal',
'autoPlayGif',
'muted',
'listLength',
]
updateOnStates = ['isExpanded']
shouldComponentUpdate (nextProps, nextState) {
if (!nextState.isIntersecting && nextState.isHidden) {
// It's only if we're not intersecting (i.e. offscreen) and isHidden is true
// that either "isIntersecting" or "isHidden" matter, and then they're
// the only things that matter (and updated ARIA attributes).
return this.state.isIntersecting || !this.state.isHidden || nextProps.listLength !== this.props.listLength;
} else if (nextState.isIntersecting && !this.state.isIntersecting) {
// If we're going from a non-intersecting state to an intersecting state,
// (i.e. offscreen to onscreen), then we definitely need to re-render
return true;
}
// Otherwise, diff based on "updateOnProps" and "updateOnStates"
return super.shouldComponentUpdate(nextProps, nextState);
}
componentDidMount () {
if (!this.props.intersectionObserverWrapper) {
// TODO: enable IntersectionObserver optimization for notification statuses.
// These are managed in notifications/index.js rather than status_list.js
return;
}
this.props.intersectionObserverWrapper.observe(
this.props.id,
this.node,
this.handleIntersection
);
this.componentMounted = true;
}
componentWillUnmount () {
if (this.props.intersectionObserverWrapper) {
this.props.intersectionObserverWrapper.unobserve(this.props.id, this.node);
}
this.componentMounted = false;
}
handleIntersection = (entry) => {
if (this.node && this.node.children.length !== 0) {
// save the height of the fully-rendered element
this.height = getRectFromEntry(entry).height;
if (this.props.onHeightChange) {
this.props.onHeightChange(this.props.status, this.height);
}
}
this.setState((prevState) => {
if (prevState.isIntersecting && !entry.isIntersecting) {
scheduleIdleTask(this.hideIfNotIntersecting);
}
return {
isIntersecting: entry.isIntersecting,
isHidden: false,
};
});
}
hideIfNotIntersecting = () => {
if (!this.componentMounted) {
return;
}
// When the browser gets a chance, test if we're still not intersecting,
// and if so, set our isHidden to true to trigger an unrender. The point of
// this is to save DOM nodes and avoid using up too much memory.
// See: https://github.com/tootsuite/mastodon/issues/2900
this.setState((prevState) => ({ isHidden: !prevState.isIntersecting }));
}
handleRef = (node) => {
this.node = node;
}
handleClick = () => {
if (!this.context.router) {
return;
}
const { status } = this.props;
this.context.router.history.push(`/statuses/${status.getIn(['reblog', 'id'], status.get('id'))}`);
}
handleAccountClick = (e) => {
if (this.context.router && e.button === 0) {
const id = Number(e.currentTarget.getAttribute('data-id'));
e.preventDefault();
this.context.router.history.push(`/accounts/${id}`);
}
}
handleExpandedToggle = () => {
this.setState({ isExpanded: !this.state.isExpanded });
};
renderLoadingMediaGallery () {
return <div className='media_gallery' style={{ height: '110px' }} />;
}
renderLoadingVideoPlayer () {
return <div className='media-spoiler-video' style={{ height: '110px' }} />;
}
render () {
let media = null;
let statusAvatar;
// Exclude intersectionObserverWrapper from `other` variable
// because intersection is managed in here.
const { status, account, intersectionObserverWrapper, index, listLength, wrapped, ...other } = this.props;
const { isExpanded, isIntersecting, isHidden } = this.state;
if (status === null) {
return null;
}
const hasIntersectionObserverWrapper = !!this.props.intersectionObserverWrapper;
const isHiddenForSure = isIntersecting === false && isHidden;
const visibilityUnknownButHeightIsCached = isIntersecting === undefined && status.has('height');
if (hasIntersectionObserverWrapper && (isHiddenForSure || visibilityUnknownButHeightIsCached)) {
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' }}>
{status.getIn(['account', 'display_name']) || status.getIn(['account', 'username'])}
{status.get('content')}
</article>
);
}
if (status.get('reblog', null) !== null && typeof status.get('reblog') === 'object') {
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__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>
);
}
if (status.get('media_attachments').size > 0 && !this.props.muted) {
if (status.get('media_attachments').some(item => item.get('type') === 'unknown')) {
} else if (status.getIn(['media_attachments', 0, 'type']) === 'video') {
media = (
<Bundle fetchComponent={VideoPlayer} loading={this.renderLoadingVideoPlayer} >
{Component => <Component media={status.getIn(['media_attachments', 0])} sensitive={status.get('sensitive')} onOpenVideo={this.props.onOpenVideo} />}
</Bundle>
);
} else {
media = (
<Bundle fetchComponent={MediaGallery} loading={this.renderLoadingMediaGallery} >
{Component => <Component media={status.get('media_attachments')} sensitive={status.get('sensitive')} height={110} onOpenMedia={this.props.onOpenMedia} autoPlayGif={this.props.autoPlayGif} />}
</Bundle>
);
}
}
if (account === undefined || account === null) {
statusAvatar = <Avatar account={status.get('account')} size={48} />;
}else{
statusAvatar = <AvatarOverlay account={status.get('account')} friend={account} />;
}
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__info'>
<a href={status.get('url')} className='status__relative-time' target='_blank' rel='noopener'><RelativeTimestamp timestamp={status.get('created_at')} /></a>
<a onClick={this.handleAccountClick} target='_blank' data-id={status.getIn(['account', 'id'])} href={status.getIn(['account', 'url'])} className='status__display-name'>
<div className='status__avatar'>
{statusAvatar}
</div>
<DisplayName account={status.get('account')} />
</a>
</div>
<StatusContent status={status} onClick={this.handleClick} expanded={isExpanded} onExpandedToggle={this.handleExpandedToggle} />
{media}
<StatusActionBar {...this.props} />
</article>
);
}
}