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Lotus CIandClaude Opus 5.5 1c62fb4722 fix(reactions): the reactions row no longer flickers or loses its spacing (#305)
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Two bugs in the one-row "+N" collapse:
- measure() used the border box, which grows by 4 px while collapsed
  (margin -2 / padding 2), so a row within 4 px of fitting flipped
  collapsed↔expanded every frame (flicker, layout shifts, ~11 % of a core
  per looping message). It now measures the content box.
- The collapsed style used the `margin` shorthand, which overrode the
  timeline's marginTop and, when removed, cleared it; the row then stuck
  to the message text. Longhand margins keep marginTop (minus 2 px).

Verified headless (12 reactions, viewport sweep 1300–1400 px): before,
90 style flips in 1.5 s at 1344 px and margin-top 0px after a cycle;
now 0 flips at every width and margin-top stays 8px.

Fixes #305

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5
2026-10-17 18:26:16 -04:00
2 changed files with 158 additions and 189 deletions
+24 -4
View File
@@ -69,8 +69,15 @@ export const Reactions = as<'div', ReactionsProps>(
const measure = useCallback(() => {
const container = containerRef.current;
if (!container) return;
const rowWidth = container.getBoundingClientRect().width;
const gap = parseFloat(getComputedStyle(container).columnGap) || 8;
// [Gitea #305] The width the chips actually get (content box). The border
// box grows by 4 px while collapsed (margin -2 / padding 2), and measuring
// it made a row within 4 px of fitting flip collapsed↔expanded every frame.
const cs = getComputedStyle(container);
const rowWidth =
container.clientWidth -
(parseFloat(cs.paddingLeft) || 0) -
(parseFloat(cs.paddingRight) || 0);
const gap = parseFloat(cs.columnGap) || 8;
const chips = keys ? keys.split('\u0000').map((k) => chipRefs.current.get(k)) : [];
const widths = chips.map((el) => el?.getBoundingClientRect().width ?? 0);
const moreWidth = moreRef.current?.getBoundingClientRect().width ?? 48;
@@ -110,8 +117,21 @@ export const Reactions = as<'div', ReactionsProps>(
style={{
...props.style,
...(collapsed && rowHeight
? // 2px breathing room so row-1 focus outlines are not clipped.
{ maxHeight: rowHeight + 4, overflow: 'hidden', padding: 2, margin: -2 }
? // 2px breathing room so row-1 focus outlines are not clipped. Longhand
// margins so the timeline's marginTop survives (Gitea #305: the
// `margin` shorthand overrode it and, once removed, cleared it).
{
maxHeight: rowHeight + 4,
overflow: 'hidden',
padding: 2,
marginLeft: -2,
marginRight: -2,
marginBottom: -2,
marginTop:
props.style?.marginTop !== undefined
? `calc(${typeof props.style.marginTop === 'number' ? `${props.style.marginTop}px` : props.style.marginTop} - 2px)`
: -2,
}
: {}),
}}
ref={(el) => {
+134 -185
View File
@@ -255,8 +255,6 @@ function HomeCustomSection({
return (localName ?? matrixName).toLowerCase().includes(query);
});
}, [mx, section.rooms, closed, roomsWithUnreadSet, selectedRoomId, filterQuery]);
// [Gitea #289] While filtering, a section with no matches is hidden.
if (filterQuery.trim() && items.length === 0) return null;
// Sections are user-curated and small, so they render plainly — no
// virtualizer per section (a late-mounted one never measured its scroller).
return (
@@ -445,26 +443,6 @@ export function Home() {
});
}, [mx, sortedRooms, filterQuery]);
// [Gitea #289] While filtering, hide empty sections; with no match at all,
// say so instead of leaving bare headers.
const filtering = filterQuery.trim().length > 0;
const customSectionMatch = useMemo(() => {
if (!filtering) return true;
const query = filterQuery.toLowerCase();
const localNames = getLocalRoomNamesContent(mx);
return customSections.some((section) =>
section.rooms.some((rId) =>
(localNames.rooms[rId] ?? mx.getRoom(rId)?.name ?? '').toLowerCase().includes(query),
),
);
}, [mx, customSections, filtering, filterQuery]);
const noFilterMatch =
filtering &&
!customSectionMatch &&
filteredFavoriteRooms.length === 0 &&
filteredRooms.length === 0 &&
filteredLowPriorityRooms.length === 0;
const favVirtualizer = useVirtualizer({
count: filteredFavoriteRooms.length,
getScrollElement: () => scrollRef.current,
@@ -602,7 +580,7 @@ export function Home() {
/>
</Box>
</NavCategory>
{favoriteRooms.length > 0 && (!filtering || filteredFavoriteRooms.length > 0) && (
{favoriteRooms.length > 0 && (
<NavCategory>
<NavCategoryHeader>
<RoomNavCategoryButton
@@ -651,171 +629,142 @@ export function Home() {
notificationPreferences={notificationPreferences}
/>
))}
{noFilterMatch && (
<NavCategory>
<Box
direction="Column"
alignItems="Center"
gap="200"
style={{ padding: config.space.S400 }}
<NavCategory>
<NavCategoryHeader>
<RoomNavCategoryButton
closed={closedCategories.has(DEFAULT_CATEGORY_ID)}
data-category-id={DEFAULT_CATEGORY_ID}
onClick={handleCategoryClick}
>
<Text size="T300" priority="300" align="Center">
No rooms match &ldquo;{filterQuery.trim()}&rdquo;
</Text>
<Button
size="300"
variant="Secondary"
fill="Soft"
radii="300"
onClick={() => setFilterQuery('')}
>
<Text size="B300">Clear filter</Text>
</Button>
</Box>
</NavCategory>
)}
{(!filtering || filteredRooms.length > 0) && (
<NavCategory>
<NavCategoryHeader>
<RoomNavCategoryButton
closed={closedCategories.has(DEFAULT_CATEGORY_ID)}
data-category-id={DEFAULT_CATEGORY_ID}
onClick={handleCategoryClick}
>
Rooms
</RoomNavCategoryButton>
{!closedCategories.has(DEFAULT_CATEGORY_ID) && (
<>
<IconButton
aria-expanded={!!sortMenuAnchor}
aria-haspopup="menu"
variant="Background"
fill="None"
size="300"
radii="300"
onClick={(evt: React.MouseEvent<HTMLButtonElement>) => {
const cords = evt.currentTarget.getBoundingClientRect();
setSortMenuAnchor((current) => (current ? undefined : cords));
}}
aria-label="Sort rooms"
>
<Icon src={Icons.Sort} size="100" />
</IconButton>
<PopOut
anchor={sortMenuAnchor}
position="Bottom"
align="End"
offset={6}
content={
<FocusTrap
focusTrapOptions={{
initialFocus: false,
onDeactivate: () => setSortMenuAnchor(undefined),
clickOutsideDeactivates: true,
isKeyForward: (evt: KeyboardEvent) => evt.key === 'ArrowDown',
isKeyBackward: (evt: KeyboardEvent) => evt.key === 'ArrowUp',
escapeDeactivates: stopPropagation,
}}
>
<Menu style={{ maxWidth: toRem(180), width: '100vw' }}>
<Box
direction="Column"
gap="100"
style={{ padding: config.space.S100 }}
Rooms
</RoomNavCategoryButton>
{!closedCategories.has(DEFAULT_CATEGORY_ID) && (
<>
<IconButton
aria-expanded={!!sortMenuAnchor}
aria-haspopup="menu"
variant="Background"
fill="None"
size="300"
radii="300"
onClick={(evt: React.MouseEvent<HTMLButtonElement>) => {
const cords = evt.currentTarget.getBoundingClientRect();
setSortMenuAnchor((current) => (current ? undefined : cords));
}}
aria-label="Sort rooms"
>
<Icon src={Icons.Sort} size="100" />
</IconButton>
<PopOut
anchor={sortMenuAnchor}
position="Bottom"
align="End"
offset={6}
content={
<FocusTrap
focusTrapOptions={{
initialFocus: false,
onDeactivate: () => setSortMenuAnchor(undefined),
clickOutsideDeactivates: true,
isKeyForward: (evt: KeyboardEvent) => evt.key === 'ArrowDown',
isKeyBackward: (evt: KeyboardEvent) => evt.key === 'ArrowUp',
escapeDeactivates: stopPropagation,
}}
>
<Menu style={{ maxWidth: toRem(180), width: '100vw' }}>
<Box
direction="Column"
gap="100"
style={{ padding: config.space.S100 }}
>
<MenuItem
onClick={() => {
setHomeRoomSort('recent');
setSortMenuAnchor(undefined);
}}
size="300"
after={
homeRoomSort === 'recent' ? (
<Icon size="100" src={Icons.Check} />
) : undefined
}
radii="300"
>
<MenuItem
onClick={() => {
setHomeRoomSort('recent');
setSortMenuAnchor(undefined);
}}
size="300"
after={
homeRoomSort === 'recent' ? (
<Icon size="100" src={Icons.Check} />
) : undefined
}
radii="300"
>
<Text style={{ flexGrow: 1 }} as="span" size="T300" truncate>
Recent Activity
</Text>
</MenuItem>
<MenuItem
onClick={() => {
setHomeRoomSort('alpha');
setSortMenuAnchor(undefined);
}}
size="300"
after={
homeRoomSort === 'alpha' ? (
<Icon size="100" src={Icons.Check} />
) : undefined
}
radii="300"
>
<Text style={{ flexGrow: 1 }} as="span" size="T300" truncate>
A → Z
</Text>
</MenuItem>
<MenuItem
onClick={() => {
setHomeRoomSort('unread');
setSortMenuAnchor(undefined);
}}
size="300"
after={
homeRoomSort === 'unread' ? (
<Icon size="100" src={Icons.Check} />
) : undefined
}
radii="300"
>
<Text style={{ flexGrow: 1 }} as="span" size="T300" truncate>
Unread First
</Text>
</MenuItem>
</Box>
</Menu>
</FocusTrap>
}
/>
</>
)}
</NavCategoryHeader>
<div
style={{
position: 'relative',
height: virtualizer.getTotalSize(),
}}
>
{virtualizer.getVirtualItems().map((vItem) => {
const roomId = filteredRooms[vItem.index];
const room = mx.getRoom(roomId);
if (!room) return null;
const selected = selectedRoomId === roomId;
<Text style={{ flexGrow: 1 }} as="span" size="T300" truncate>
Recent Activity
</Text>
</MenuItem>
<MenuItem
onClick={() => {
setHomeRoomSort('alpha');
setSortMenuAnchor(undefined);
}}
size="300"
after={
homeRoomSort === 'alpha' ? (
<Icon size="100" src={Icons.Check} />
) : undefined
}
radii="300"
>
<Text style={{ flexGrow: 1 }} as="span" size="T300" truncate>
A → Z
</Text>
</MenuItem>
<MenuItem
onClick={() => {
setHomeRoomSort('unread');
setSortMenuAnchor(undefined);
}}
size="300"
after={
homeRoomSort === 'unread' ? (
<Icon size="100" src={Icons.Check} />
) : undefined
}
radii="300"
>
<Text style={{ flexGrow: 1 }} as="span" size="T300" truncate>
Unread First
</Text>
</MenuItem>
</Box>
</Menu>
</FocusTrap>
}
/>
</>
)}
</NavCategoryHeader>
<div
style={{
position: 'relative',
height: virtualizer.getTotalSize(),
}}
>
{virtualizer.getVirtualItems().map((vItem) => {
const roomId = filteredRooms[vItem.index];
const room = mx.getRoom(roomId);
if (!room) return null;
const selected = selectedRoomId === roomId;
return (
<VirtualTile
virtualItem={vItem}
key={roomId}
ref={virtualizer.measureElement}
>
<RoomNavItem
room={room}
selected={selected}
linkPath={getHomeRoomPath(getCanonicalAliasOrRoomId(mx, roomId))}
notificationMode={getRoomNotificationMode(
notificationPreferences,
room.roomId,
)}
/>
</VirtualTile>
);
})}
</div>
</NavCategory>
)}
{lowPriorityRooms.length > 0 && (!filtering || filteredLowPriorityRooms.length > 0) && (
return (
<VirtualTile virtualItem={vItem} key={roomId} ref={virtualizer.measureElement}>
<RoomNavItem
room={room}
selected={selected}
linkPath={getHomeRoomPath(getCanonicalAliasOrRoomId(mx, roomId))}
notificationMode={getRoomNotificationMode(
notificationPreferences,
room.roomId,
)}
/>
</VirtualTile>
);
})}
</div>
</NavCategory>
{lowPriorityRooms.length > 0 && (
<NavCategory>
<NavCategoryHeader>
<RoomNavCategoryButton