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Merge pull request #427 from ThibG/glitch-soc/fixes/scroll-behavior

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Improve ScrollableList behavior
This commit is contained in:
beatrix 2018-04-22 12:09:52 -04:00 committed by GitHub
commit 69710cf17b
3 changed files with 66 additions and 27 deletions
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54
app/javascript/flavours/glitch/components/scrollable_list.js
View file

@ -34,7 +34,7 @@ export default class ScrollableList extends PureComponent {
};
state = {
lastMouseMove: null,
fullscreen: null,
};
intersectionObserverWrapper = new IntersectionObserverWrapper();
@ -43,7 +43,6 @@ export default class ScrollableList extends PureComponent {
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();
@ -57,14 +56,6 @@ export default class ScrollableList extends PureComponent {
trailing: true,
});
handleMouseMove = throttle(() => {
this._lastMouseMove = new Date();
}, 300);
handleMouseLeave = () => {
this._lastMouseMove = null;
}
componentDidMount () {
this.attachScrollListener();
this.attachIntersectionObserver();
@ -74,22 +65,37 @@ export default class ScrollableList extends PureComponent {
this.handleScroll();
}
componentDidUpdate (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);
getScrollPosition = () => {
if (this.node && this.node.scrollTop > 0) {
return {height: this.node.scrollHeight, top: this.node.scrollTop};
} else {
return null;
}
}
// 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 (someItemInserted && this._oldScrollPosition && this.node.scrollTop > 0) {
const newScrollTop = this.node.scrollHeight - this._oldScrollPosition;
updateScrollBottom = (snapshot) => {
const newScrollTop = this.node.scrollHeight - snapshot;
if (this.node.scrollTop !== newScrollTop) {
this.node.scrollTop = newScrollTop;
}
} else {
this._oldScrollPosition = this.node.scrollHeight - this.node.scrollTop;
}
getSnapshotBeforeUpdate (prevProps, prevState) {
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);
if (someItemInserted && this.node.scrollTop > 0) {
return this.node.scrollHeight - this.node.scrollTop;
} 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.updateScrollBottom(snapshot);
}
componentWillUnmount () {
@ -141,10 +147,6 @@ export default class ScrollableList extends PureComponent {
this.props.onScrollToBottom();
}
_recentlyMoved () {
return this._lastMouseMove !== null && ((new Date()) - this._lastMouseMove < 600);
}
render () {
const { children, scrollKey, trackScroll, shouldUpdateScroll, isLoading, hasMore, prepend, emptyMessage } = this.props;
const { fullscreen } = this.state;
@ -155,7 +157,7 @@ export default class ScrollableList extends PureComponent {
if (isLoading || childrenCount > 0 || !emptyMessage) {
scrollableArea = (
<div className={classNames('scrollable', { fullscreen })} ref={this.setRef} onMouseMove={this.handleMouseMove} onMouseLeave={this.handleMouseLeave}>
<div className={classNames('scrollable', { fullscreen })} ref={this.setRef}>
<div role='feed' className='item-list'>
{prepend}
@ -168,7 +170,7 @@ export default class ScrollableList extends PureComponent {
intersectionObserverWrapper={this.intersectionObserverWrapper}
saveHeightKey={trackScroll ? `${this.context.router.route.location.key}:${scrollKey}` : null}
>
{child}
{React.cloneElement(child, {getScrollPosition: this.getScrollPosition, updateScrollBottom: this.updateScrollBottom})}
</IntersectionObserverArticleContainer>
))}

29
app/javascript/flavours/glitch/components/status.js
View file

@ -45,10 +45,13 @@ export default class Status extends ImmutablePureComponent {
withDismiss: PropTypes.bool,
onMoveUp: PropTypes.func,
onMoveDown: PropTypes.func,
getScrollPosition: PropTypes.func,
updateScrollBottom: PropTypes.func,
};
state = {
isExpanded: null,
autoCollapsed: false,
}
// Avoid checking props that are functions (and whose equality will always
@ -134,7 +137,31 @@ export default class Status extends ImmutablePureComponent {
default:
return false;
}
}()) this.setExpansion(false);
}()) {
this.setExpansion(false);
// Hack to fix timeline jumps on second rendering when auto-collapsing
this.setState({ autoCollapsed: true });
}
}
getSnapshotBeforeUpdate (prevProps, prevState) {
if (this.props.getScrollPosition) {
return this.props.getScrollPosition();
} else {
return null;
}
}
// Hack to fix timeline jumps on second rendering when auto-collapsing
componentDidUpdate (prevProps, prevState, snapshot) {
if (this.state.autoCollapsed) {
this.setState({ autoCollapsed: false });
if (snapshot !== null && this.props.updateScrollBottom) {
if (this.node.offsetTop < snapshot.top) {
this.props.updateScrollBottom(snapshot.height - snapshot.top);
}
}
}
}
// `setExpansion()` sets the value of `isExpanded` in our state. It takes

10
app/javascript/flavours/glitch/features/notifications/components/notification.js
View file

@ -16,6 +16,8 @@ export default class Notification extends ImmutablePureComponent {
onMoveUp: PropTypes.func.isRequired,
onMoveDown: PropTypes.func.isRequired,
onMention: PropTypes.func.isRequired,
getScrollPosition: PropTypes.func,
updateScrollBottom: PropTypes.func,
};
render () {
@ -25,6 +27,8 @@ export default class Notification extends ImmutablePureComponent {
onMoveDown,
onMoveUp,
onMention,
getScrollPosition,
updateScrollBottom,
} = this.props;
switch(notification.get('type')) {
@ -50,6 +54,8 @@ export default class Notification extends ImmutablePureComponent {
onMoveDown={onMoveDown}
onMoveUp={onMoveUp}
onMention={onMention}
getScrollPosition={getScrollPosition}
updateScrollBottom={updateScrollBottom}
withDismiss
/>
);
@ -66,6 +72,8 @@ export default class Notification extends ImmutablePureComponent {
onMoveDown={onMoveDown}
onMoveUp={onMoveUp}
onMention={onMention}
getScrollPosition={getScrollPosition}
updateScrollBottom={updateScrollBottom}
withDismiss
/>
);
@ -82,6 +90,8 @@ export default class Notification extends ImmutablePureComponent {
onMoveDown={onMoveDown}
onMoveUp={onMoveUp}
onMention={onMention}
getScrollPosition={getScrollPosition}
updateScrollBottom={updateScrollBottom}
withDismiss
/>
);