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Fix height cache (#4909)

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abcang 2017-09-13 17:24:33 +09:00 • committed by Eugen Rochko
parent 081f907f90
commit 60944d5dca
10 changed files with 93 additions and 61 deletions
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33
app/javascript/mastodon/components/intersection_observer_article.js
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@ -7,10 +7,13 @@ import getRectFromEntry from '../features/ui/util/get_rect_from_entry';
export default class IntersectionObserverArticle extends ImmutablePureComponent {
static propTypes = {
intersectionObserverWrapper: PropTypes.object,
intersectionObserverWrapper: PropTypes.object.isRequired,
id: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
index: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
listLength: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
saveHeightKey: PropTypes.string,
cachedHeight: PropTypes.number,
onHeightChange: PropTypes.func,
children: PropTypes.node,
};
@ -34,13 +37,10 @@ export default class IntersectionObserverArticle extends ImmutablePureComponent
}
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,
const { intersectionObserverWrapper, id } = this.props;
intersectionObserverWrapper.observe(
id,
this.node,
this.handleIntersection
);
@ -49,20 +49,21 @@ export default class IntersectionObserverArticle extends ImmutablePureComponent
}
componentWillUnmount () {
if (this.props.intersectionObserverWrapper) {
this.props.intersectionObserverWrapper.unobserve(this.props.id, this.node);
}
const { intersectionObserverWrapper, id } = this.props;
intersectionObserverWrapper.unobserve(id, this.node);
this.componentMounted = false;
}
handleIntersection = (entry) => {
const { onHeightChange, saveHeightKey, id } = this.props;
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);
if (onHeightChange && saveHeightKey) {
onHeightChange(saveHeightKey, id, this.height);
}
}
@ -94,16 +95,16 @@ export default class IntersectionObserverArticle extends ImmutablePureComponent
}
render () {
const { children, id, index, listLength } = this.props;
const { children, id, index, listLength, cachedHeight } = this.props;
const { isIntersecting, isHidden } = this.state;
if (!isIntersecting && isHidden) {
if (!isIntersecting && (isHidden || cachedHeight)) {
return (
<article
ref={this.handleRef}
aria-posinset={index}
aria-setsize={listLength}
style={{ height: `${this.height}px`, opacity: 0, overflow: 'hidden' }}
style={{ height: `${this.height || cachedHeight}px`, opacity: 0, overflow: 'hidden' }}
data-id={id}
tabIndex='0'
>