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Merge pull request #4961 from matrix-org/t3chguy/room-list/14273

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Fix room sub list header collapse/jump interactions on bottom-most sublist
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Michael Telatynski 2020-07-13 17:36:13 +01:00 committed by GitHub
commit cc49e645b7
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1 changed files with 15 additions and 11 deletions
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26
src/components/views/rooms/RoomSublist2.tsx
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@ -321,25 +321,29 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
}
};
private onHeaderClick = (ev: React.MouseEvent<HTMLDivElement>) => {
let target = ev.target as HTMLDivElement;
if (!target.classList.contains('mx_RoomSublist2_headerText')) {
// If we don't have the headerText class, the user clicked the span in the headerText.
target = target.parentElement as HTMLDivElement;
}
const possibleSticky = target.parentElement;
private onHeaderClick = () => {
const possibleSticky = this.headerButton.current.parentElement;
const sublist = possibleSticky.parentElement.parentElement;
const list = sublist.parentElement.parentElement;
// the scrollTop is capped at the height of the header in LeftPanel2
// the scrollTop is capped at the height of the header in LeftPanel2, the top header is always sticky
const isAtTop = list.scrollTop <= HEADER_HEIGHT;
const isSticky = possibleSticky.classList.contains('mx_RoomSublist2_headerContainer_sticky');
if (isSticky && !isAtTop) {
const isAtBottom = list.scrollTop >= list.scrollHeight - list.offsetHeight;
const isStickyTop = possibleSticky.classList.contains('mx_RoomSublist2_headerContainer_stickyTop');
const isStickyBottom = possibleSticky.classList.contains('mx_RoomSublist2_headerContainer_stickyBottom');
if ((isStickyBottom && !isAtBottom) || (isStickyTop && !isAtTop)) {
// is sticky - jump to list
sublist.scrollIntoView({behavior: 'smooth'});
} else {
// on screen - toggle collapse
const isExpanded = this.state.isExpanded;
this.toggleCollapsed();
// if the bottom list is collapsed then scroll it in so it doesn't expand off screen
if (!isExpanded && isStickyBottom) {
setImmediate(() => {
sublist.scrollIntoView({behavior: 'smooth'});
});
}
}
};