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refactor chatview to have two sliver lists

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Co-authored-by: Erwan Leboucher <erwanleboucher@gmail.com>
This commit is contained in:
Henry Hiles 2026-09-24 20:02:23 -04:00
commit 110caff170
Signed by: Henry-Hiles
SSH key fingerprint: SHA256:VKQUdS31Q90KvX7EkKMHMBpUspcmItAh86a+v7PGiIs
4 changed files with 161 additions and 152 deletions
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115
lib/widgets/room_chat/chat_timeline.dart
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@ -1,76 +1,79 @@
import "package:fast_immutable_collections/fast_immutable_collections.dart";
import "package:material_ui/material_ui.dart";
import "package:hooks_riverpod/hooks_riverpod.dart";
import "package:nexus/helpers/hooks/chat_scroll.dart";
import "package:nexus/models/content/message.dart";
import "package:nexus/models/event.dart";
import "package:nexus/widgets/renderers/event.dart";
import "package:nexus/widgets/highlight_wrapper.dart";
import "package:nexus/widgets/error_dialog.dart";
import "package:nexus/widgets/loading.dart";
import "package:super_sliver_list/super_sliver_list.dart";
class const ChatTimeline({
required final AsyncValue<IList<Event>?> controllerData,
required final ScrollController scrollController,
required final ListController listController,
required final bool hasMore,
required final Future<void> Function() loadOlder,
required final ChatScroll<Event> scroll,
required final Future<void> Function(String) jumpToId,
required final IList<PopupMenuEntry> Function(Event) getEventOptions,
required final String? highlightedEvent,
required final double composerHeight,
super.key,
}) extends StatelessWidget {
bool isGrouped(Event event, Event? previousEvent) =>
previousEvent?.content is MessageContent &&
previousEvent?.redactedBy == null &&
previousEvent?.relationType != "m.replace" &&
event.sender == previousEvent?.sender &&
event.pmp?.id == previousEvent?.pmp?.id;
Widget eventRow(
Event event,
Event? previousEvent, {
required Future<void> Function(String) jumpToId,
required IList<PopupMenuEntry> Function(Event) getEventOptions,
required String? highlightedEvent,
}) => HighlightWrapper(
EventRenderer(
event,
onTapReply: () => jumpToId(event.replyTo!),
getEventOptions: getEventOptions,
isGrouped: isGrouped(event, previousEvent),
),
key: ValueKey(event.eventId),
isHighlighted: highlightedEvent == event.eventId,
);
@override
Widget build(BuildContext context) => switch (controllerData) {
AsyncData(:final value?) || AsyncLoading(:final value?) => CustomScrollView(
keyboardDismissBehavior: .onDrag,
controller: scrollController,
slivers: [
if (hasMore)
SliverToBoxAdapter(
child: Padding(
padding: .symmetric(vertical: 36),
child: Center(
child: ElevatedButton(
onPressed: controllerData is AsyncData ? loadOlder : null,
child: Text("Load More"),
),
),
),
),
Widget build(BuildContext context) => CustomScrollView(
reverse: true,
center: scroll.centerKey,
keyboardDismissBehavior: .onDrag,
controller: scroll.scrollController,
slivers: [
SliverToBoxAdapter(child: SizedBox(height: composerHeight)),
SuperSliverList.builder(
listController: listController,
itemCount: value.length,
itemBuilder: (_, index) {
final event = value[index];
final previousEvent = value.getOrNull(index - 1);
return HighlightWrapper(
EventRenderer(
event,
onTapReply: () => jumpToId(event.replyTo!),
getEventOptions: getEventOptions,
isGrouped:
previousEvent?.content is MessageContent &&
previousEvent?.redactedBy == null &&
previousEvent?.relationType != "m.replace" &&
event.sender == previousEvent?.sender &&
event.pmp?.id == previousEvent?.pmp?.id,
),
isHighlighted: highlightedEvent == event.eventId,
);
},
SuperSliverList.builder(
listController: scroll.liveListController,
itemCount: scroll.liveItems.length,
itemBuilder: (_, index) => eventRow(
scroll.liveItems[index],
index > 0
? scroll.liveItems.getOrNull(index - 1)
: scroll.historyItems.firstOrNull,
jumpToId: jumpToId,
getEventOptions: getEventOptions,
highlightedEvent: highlightedEvent,
),
),
SliverPadding(padding: .only(bottom: composerHeight)),
],
),
AsyncData() => Center(child: Text("Nothing to see here...")),
AsyncLoading() => Loading(),
AsyncError(:final error, :final stackTrace) => ErrorDialog(
error,
stackTrace,
),
};
SuperSliverList.builder(
key: scroll.centerKey,
listController: scroll.historyListController,
itemCount: scroll.historyItems.length,
itemBuilder: (_, index) => eventRow(
scroll.historyItems[index],
scroll.historyItems.getOrNull(index),
jumpToId: jumpToId,
getEventOptions: getEventOptions,
highlightedEvent: highlightedEvent,
),
),
],
);
}