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Only show when not at most recent comment

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This commit is contained in:
saltrafael 2021-06-21 10:51:07 -03:00
parent aea22d10ee
commit 52f15df5a3
1 changed files with 14 additions and 11 deletions
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25
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 [isBottomScroll, setIsBottomScroll] = React.useState();
const [scrollBottom, setScrollBottom] = React.useState(true);
const [viewMode, setViewMode] = React.useState(VIEW_MODE_CHAT);
const [performedInitialScroll, setPerformedInitialScroll] = React.useState(false);
const claimId = claim && claim.claim_id;
@ -79,30 +79,33 @@ export default function LivestreamComments(props: Props) {
}, [claimId, uri, doCommentList, doSuperChatList, doCommentSocketConnect, doCommentSocketDisconnect]);
React.useEffect(() => {
const element = document.querySelector('.livestream__comments');
const discussionElement = document.querySelector('.livestream__comments');
const commentElement = document.querySelector('.livestream-comment');
function handleScroll() {
if (element) {
const isAtBottom = element.scrollTop >= -100;
setIsBottomScroll(isAtBottom);
if (discussionElement) {
const negativeCommentHeight = (-1 * commentElement.offsetHeight);
const isAtRecent = discussionElement.scrollTop >= negativeCommentHeight;
setScrollBottom(isAtRecent);
}
}
if (element) {
element.addEventListener('scroll', handleScroll);
if (discussionElement) {
discussionElement.addEventListener('scroll', handleScroll);
if (commentsLength > 0) {
// Only update comment scroll if the user hasn't scrolled up to view old comments
// If they have, do nothing
if (!performedInitialScroll) {
setTimeout(() => (element.scrollTop = element.scrollHeight - element.offsetHeight + 100), 20);
setTimeout(() => (discussionElement.scrollTop = discussionElement.scrollHeight - discussionElement.offsetHeight + 100), 20);
setPerformedInitialScroll(true);
}
}
return () => element.removeEventListener('scroll', handleScroll);
return () => discussionElement.removeEventListener('scroll', handleScroll);
}
}, [commentsLength, isBottomScroll, performedInitialScroll, setPerformedInitialScroll, setIsBottomScroll]);
}, [commentsLength, performedInitialScroll, setPerformedInitialScroll, setScrollBottom]);
if (!claim) {
return null;
@ -191,7 +194,7 @@ export default function LivestreamComments(props: Props) {
<div className="main--empty" style={{ flex: 1 }} />
)}
{!isBottomScroll && (
{!scrollBottom && (
<Button
button="alt"
className="livestream__comments-scroll__down"