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Button to scroll to recent live chats (scroll to bottom)

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This commit is contained in:
saltrafael 2021-06-18 10:40:52 -03:00
parent eb0992879c
commit aea22d10ee
1 changed files with 23 additions and 22 deletions
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45
ui/component/livestreamComments/view.jsx
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@ -45,7 +45,7 @@ export default function LivestreamComments(props: Props) {
myChannels,
} = props;
const commentsRef = React.createRef();
const hasScrolledComments = React.useRef();
const [isBottomScroll, setIsBottomScroll] = React.useState();
const [viewMode, setViewMode] = React.useState(VIEW_MODE_CHAT);
const [performedInitialScroll, setPerformedInitialScroll] = React.useState(false);
const claimId = claim && claim.claim_id;
@ -79,18 +79,12 @@ export default function LivestreamComments(props: Props) {
}, [claimId, uri, doCommentList, doSuperChatList, doCommentSocketConnect, doCommentSocketDisconnect]);
React.useEffect(() => {
const element = commentsRef.current;
const element = document.querySelector('.livestream__comments');
function handleScroll() {
if (element) {
const scrollHeight = element.scrollHeight - element.offsetHeight;
const isAtBottom = scrollHeight <= element.scrollTop + 100;
if (!isAtBottom) {
hasScrolledComments.current = true;
} else {
hasScrolledComments.current = false;
}
const isAtBottom = element.scrollTop >= -100;
setIsBottomScroll(isAtBottom);
}
}
@ -100,27 +94,25 @@ export default function LivestreamComments(props: Props) {
if (commentsLength > 0) {
// Only update comment scroll if the user hasn't scrolled up to view old comments
// If they have, do nothing
if (!hasScrolledComments.current || !performedInitialScroll) {
if (!performedInitialScroll) {
setTimeout(() => (element.scrollTop = element.scrollHeight - element.offsetHeight + 100), 20);
if (!performedInitialScroll) {
setPerformedInitialScroll(true);
}
setPerformedInitialScroll(true);
}
}
}
return () => {
if (element) {
element.removeEventListener('scroll', handleScroll);
}
};
}, [commentsRef, commentsLength, performedInitialScroll]);
return () => element.removeEventListener('scroll', handleScroll);
}
}, [commentsLength, isBottomScroll, performedInitialScroll, setPerformedInitialScroll, setIsBottomScroll]);
if (!claim) {
return null;
}
function scrollBack() {
const element = document.querySelector('.livestream__comments');
if (element) element.scrollTop = 0;
}
return (
<div className="card livestream__discussion">
<div className="card__header--between livestream-discussion__header">
@ -199,6 +191,15 @@ export default function LivestreamComments(props: Props) {
<div className="main--empty" style={{ flex: 1 }} />
)}
{!isBottomScroll && (
<Button
button="alt"
className="livestream__comments-scroll__down"
label={__('Recent Comments')}
onClick={() => scrollBack()}
/>
)}
<div className="livestream__comment-create">
<CommentCreate livestream bottom embed={embed} uri={uri} />
</div>