mirror of
https://git.kescher.at/CatCatNya/catstodon.git
synced 2024-12-09 11:49:03 +01:00
368 lines
11 KiB
JavaScript
368 lines
11 KiB
JavaScript
import React, { PureComponent } from 'react';
|
|
import ScrollContainer from 'mastodon/containers/scroll_container';
|
|
import PropTypes from 'prop-types';
|
|
import IntersectionObserverArticleContainer from '../containers/intersection_observer_article_container';
|
|
import LoadMore from './load_more';
|
|
import LoadPending from './load_pending';
|
|
import IntersectionObserverWrapper from '../features/ui/util/intersection_observer_wrapper';
|
|
import { throttle } from 'lodash';
|
|
import { List as ImmutableList } from 'immutable';
|
|
import classNames from 'classnames';
|
|
import { attachFullscreenListener, detachFullscreenListener, isFullscreen } from '../features/ui/util/fullscreen';
|
|
import LoadingIndicator from './loading_indicator';
|
|
import { connect } from 'react-redux';
|
|
|
|
const MOUSE_IDLE_DELAY = 300;
|
|
|
|
const mapStateToProps = (state, { scrollKey }) => {
|
|
return {
|
|
preventScroll: scrollKey === state.getIn(['dropdown_menu', 'scroll_key']),
|
|
};
|
|
};
|
|
|
|
class ScrollableList extends PureComponent {
|
|
|
|
static contextTypes = {
|
|
router: PropTypes.object,
|
|
};
|
|
|
|
static propTypes = {
|
|
scrollKey: PropTypes.string.isRequired,
|
|
onLoadMore: PropTypes.func,
|
|
onLoadPending: PropTypes.func,
|
|
onScrollToTop: PropTypes.func,
|
|
onScroll: PropTypes.func,
|
|
trackScroll: PropTypes.bool,
|
|
isLoading: PropTypes.bool,
|
|
showLoading: PropTypes.bool,
|
|
hasMore: PropTypes.bool,
|
|
numPending: PropTypes.number,
|
|
prepend: PropTypes.node,
|
|
append: PropTypes.node,
|
|
alwaysPrepend: PropTypes.bool,
|
|
emptyMessage: PropTypes.node,
|
|
children: PropTypes.node,
|
|
bindToDocument: PropTypes.bool,
|
|
preventScroll: PropTypes.bool,
|
|
};
|
|
|
|
static defaultProps = {
|
|
trackScroll: true,
|
|
};
|
|
|
|
state = {
|
|
fullscreen: null,
|
|
cachedMediaWidth: 250, // Default media/card width using default Mastodon theme
|
|
};
|
|
|
|
intersectionObserverWrapper = new IntersectionObserverWrapper();
|
|
|
|
handleScroll = throttle(() => {
|
|
if (this.node) {
|
|
const scrollTop = this.getScrollTop();
|
|
const scrollHeight = this.getScrollHeight();
|
|
const clientHeight = this.getClientHeight();
|
|
const offset = scrollHeight - scrollTop - clientHeight;
|
|
|
|
if (400 > offset && this.props.onLoadMore && this.props.hasMore && !this.props.isLoading) {
|
|
this.props.onLoadMore();
|
|
}
|
|
|
|
if (scrollTop < 100 && this.props.onScrollToTop) {
|
|
this.props.onScrollToTop();
|
|
} else if (this.props.onScroll) {
|
|
this.props.onScroll();
|
|
}
|
|
|
|
if (!this.lastScrollWasSynthetic) {
|
|
// If the last scroll wasn't caused by setScrollTop(), assume it was
|
|
// intentional and cancel any pending scroll reset on mouse idle
|
|
this.scrollToTopOnMouseIdle = false;
|
|
}
|
|
this.lastScrollWasSynthetic = false;
|
|
}
|
|
}, 150, {
|
|
trailing: true,
|
|
});
|
|
|
|
mouseIdleTimer = null;
|
|
mouseMovedRecently = false;
|
|
lastScrollWasSynthetic = false;
|
|
scrollToTopOnMouseIdle = false;
|
|
|
|
_getScrollingElement = () => {
|
|
if (this.props.bindToDocument) {
|
|
return (document.scrollingElement || document.body);
|
|
} else {
|
|
return this.node;
|
|
}
|
|
};
|
|
|
|
setScrollTop = newScrollTop => {
|
|
if (this.getScrollTop() !== newScrollTop) {
|
|
this.lastScrollWasSynthetic = true;
|
|
|
|
this._getScrollingElement().scrollTop = newScrollTop;
|
|
}
|
|
};
|
|
|
|
clearMouseIdleTimer = () => {
|
|
if (this.mouseIdleTimer === null) {
|
|
return;
|
|
}
|
|
|
|
clearTimeout(this.mouseIdleTimer);
|
|
this.mouseIdleTimer = null;
|
|
};
|
|
|
|
handleMouseMove = throttle(() => {
|
|
// As long as the mouse keeps moving, clear and restart the idle timer.
|
|
this.clearMouseIdleTimer();
|
|
this.mouseIdleTimer = setTimeout(this.handleMouseIdle, MOUSE_IDLE_DELAY);
|
|
|
|
if (!this.mouseMovedRecently && this.getScrollTop() === 0) {
|
|
// Only set if we just started moving and are scrolled to the top.
|
|
this.scrollToTopOnMouseIdle = true;
|
|
}
|
|
|
|
// Save setting this flag for last, so we can do the comparison above.
|
|
this.mouseMovedRecently = true;
|
|
}, MOUSE_IDLE_DELAY / 2);
|
|
|
|
handleWheel = throttle(() => {
|
|
this.scrollToTopOnMouseIdle = false;
|
|
}, 150, {
|
|
trailing: true,
|
|
});
|
|
|
|
handleMouseIdle = () => {
|
|
if (this.scrollToTopOnMouseIdle && !this.props.preventScroll) {
|
|
this.setScrollTop(0);
|
|
}
|
|
|
|
this.mouseMovedRecently = false;
|
|
this.scrollToTopOnMouseIdle = false;
|
|
};
|
|
|
|
componentDidMount () {
|
|
this.attachScrollListener();
|
|
this.attachIntersectionObserver();
|
|
|
|
attachFullscreenListener(this.onFullScreenChange);
|
|
|
|
// Handle initial scroll position
|
|
this.handleScroll();
|
|
}
|
|
|
|
getScrollPosition = () => {
|
|
if (this.node && (this.getScrollTop() > 0 || this.mouseMovedRecently)) {
|
|
return { height: this.getScrollHeight(), top: this.getScrollTop() };
|
|
} else {
|
|
return null;
|
|
}
|
|
};
|
|
|
|
getScrollTop = () => {
|
|
return this._getScrollingElement().scrollTop;
|
|
};
|
|
|
|
getScrollHeight = () => {
|
|
return this._getScrollingElement().scrollHeight;
|
|
};
|
|
|
|
getClientHeight = () => {
|
|
return this._getScrollingElement().clientHeight;
|
|
};
|
|
|
|
updateScrollBottom = (snapshot) => {
|
|
const newScrollTop = this.getScrollHeight() - snapshot;
|
|
|
|
this.setScrollTop(newScrollTop);
|
|
};
|
|
|
|
getSnapshotBeforeUpdate (prevProps) {
|
|
const someItemInserted = React.Children.count(prevProps.children) > 0 &&
|
|
React.Children.count(prevProps.children) < React.Children.count(this.props.children) &&
|
|
this.getFirstChildKey(prevProps) !== this.getFirstChildKey(this.props);
|
|
const pendingChanged = (prevProps.numPending > 0) !== (this.props.numPending > 0);
|
|
|
|
if (pendingChanged || someItemInserted && (this.getScrollTop() > 0 || this.mouseMovedRecently || this.props.preventScroll)) {
|
|
return this.getScrollHeight() - this.getScrollTop();
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
componentDidUpdate (prevProps, prevState, snapshot) {
|
|
// Reset the scroll position when a new child comes in in order not to
|
|
// jerk the scrollbar around if you're already scrolled down the page.
|
|
if (snapshot !== null) {
|
|
this.setScrollTop(this.getScrollHeight() - snapshot);
|
|
}
|
|
}
|
|
|
|
cacheMediaWidth = (width) => {
|
|
if (width && this.state.cachedMediaWidth !== width) {
|
|
this.setState({ cachedMediaWidth: width });
|
|
}
|
|
};
|
|
|
|
componentWillUnmount () {
|
|
this.clearMouseIdleTimer();
|
|
this.detachScrollListener();
|
|
this.detachIntersectionObserver();
|
|
|
|
detachFullscreenListener(this.onFullScreenChange);
|
|
}
|
|
|
|
onFullScreenChange = () => {
|
|
this.setState({ fullscreen: isFullscreen() });
|
|
};
|
|
|
|
attachIntersectionObserver () {
|
|
let nodeOptions = {
|
|
root: this.node,
|
|
rootMargin: '300% 0px',
|
|
};
|
|
|
|
this.intersectionObserverWrapper
|
|
.connect(this.props.bindToDocument ? {} : nodeOptions);
|
|
}
|
|
|
|
detachIntersectionObserver () {
|
|
this.intersectionObserverWrapper.disconnect();
|
|
}
|
|
|
|
attachScrollListener () {
|
|
if (this.props.bindToDocument) {
|
|
document.addEventListener('scroll', this.handleScroll);
|
|
document.addEventListener('wheel', this.handleWheel);
|
|
} else {
|
|
this.node.addEventListener('scroll', this.handleScroll);
|
|
this.node.addEventListener('wheel', this.handleWheel);
|
|
}
|
|
}
|
|
|
|
detachScrollListener () {
|
|
if (this.props.bindToDocument) {
|
|
document.removeEventListener('scroll', this.handleScroll);
|
|
document.removeEventListener('wheel', this.handleWheel);
|
|
} else {
|
|
this.node.removeEventListener('scroll', this.handleScroll);
|
|
this.node.removeEventListener('wheel', this.handleWheel);
|
|
}
|
|
}
|
|
|
|
getFirstChildKey (props) {
|
|
const { children } = props;
|
|
let firstChild = children;
|
|
|
|
if (children instanceof ImmutableList) {
|
|
firstChild = children.get(0);
|
|
} else if (Array.isArray(children)) {
|
|
firstChild = children[0];
|
|
}
|
|
|
|
return firstChild && firstChild.key;
|
|
}
|
|
|
|
setRef = (c) => {
|
|
this.node = c;
|
|
};
|
|
|
|
handleLoadMore = e => {
|
|
e.preventDefault();
|
|
this.props.onLoadMore();
|
|
};
|
|
|
|
handleLoadPending = e => {
|
|
e.preventDefault();
|
|
this.props.onLoadPending();
|
|
// Prevent the weird scroll-jumping behavior, as we explicitly don't want to
|
|
// scroll to top, and we know the scroll height is going to change
|
|
this.scrollToTopOnMouseIdle = false;
|
|
this.lastScrollWasSynthetic = false;
|
|
this.clearMouseIdleTimer();
|
|
this.mouseIdleTimer = setTimeout(this.handleMouseIdle, MOUSE_IDLE_DELAY);
|
|
this.mouseMovedRecently = true;
|
|
};
|
|
|
|
render () {
|
|
const { children, scrollKey, trackScroll, showLoading, isLoading, hasMore, numPending, prepend, alwaysPrepend, append, emptyMessage, onLoadMore } = this.props;
|
|
const { fullscreen } = this.state;
|
|
const childrenCount = React.Children.count(children);
|
|
|
|
const loadMore = (hasMore && onLoadMore) ? <LoadMore visible={!isLoading} onClick={this.handleLoadMore} /> : null;
|
|
const loadPending = (numPending > 0) ? <LoadPending count={numPending} onClick={this.handleLoadPending} /> : null;
|
|
let scrollableArea = null;
|
|
|
|
if (showLoading) {
|
|
scrollableArea = (
|
|
<div className='scrollable scrollable--flex' ref={this.setRef}>
|
|
<div role='feed' className='item-list'>
|
|
{prepend}
|
|
</div>
|
|
|
|
<div className='scrollable__append'>
|
|
<LoadingIndicator />
|
|
</div>
|
|
</div>
|
|
);
|
|
} else if (isLoading || childrenCount > 0 || numPending > 0 || hasMore || !emptyMessage) {
|
|
scrollableArea = (
|
|
<div className={classNames('scrollable', { fullscreen })} ref={this.setRef} onMouseMove={this.handleMouseMove}>
|
|
<div role='feed' className='item-list'>
|
|
{prepend}
|
|
|
|
{loadPending}
|
|
|
|
{React.Children.map(this.props.children, (child, index) => (
|
|
<IntersectionObserverArticleContainer
|
|
key={child.key}
|
|
id={child.key}
|
|
index={index}
|
|
listLength={childrenCount}
|
|
intersectionObserverWrapper={this.intersectionObserverWrapper}
|
|
saveHeightKey={trackScroll ? `${this.context.router.route.location.key}:${scrollKey}` : null}
|
|
>
|
|
{React.cloneElement(child, {
|
|
getScrollPosition: this.getScrollPosition,
|
|
updateScrollBottom: this.updateScrollBottom,
|
|
cachedMediaWidth: this.state.cachedMediaWidth,
|
|
cacheMediaWidth: this.cacheMediaWidth,
|
|
})}
|
|
</IntersectionObserverArticleContainer>
|
|
))}
|
|
|
|
{loadMore}
|
|
|
|
{!hasMore && append}
|
|
</div>
|
|
</div>
|
|
);
|
|
} else {
|
|
scrollableArea = (
|
|
<div className={classNames('scrollable scrollable--flex', { fullscreen })} ref={this.setRef}>
|
|
{alwaysPrepend && prepend}
|
|
|
|
<div className='empty-column-indicator'>
|
|
{emptyMessage}
|
|
</div>
|
|
</div>
|
|
);
|
|
}
|
|
|
|
if (trackScroll) {
|
|
return (
|
|
<ScrollContainer scrollKey={scrollKey}>
|
|
{scrollableArea}
|
|
</ScrollContainer>
|
|
);
|
|
} else {
|
|
return scrollableArea;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
export default connect(mapStateToProps, null, null, { forwardRef: true })(ScrollableList);
|