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@ -24,11 +24,15 @@ class ChatEventList extends StatelessWidget {
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Widget build(BuildContext context) {
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final horizontalPadding = FluffyThemes.isColumnMode(context) ? 8.0 : 0.0;
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final events = controller.timeline!.events
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.where((event) => event.isVisibleInGui)
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.toList();
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// create a map of eventId --> index to greatly improve performance of
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// ListView's findChildIndexCallback
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final thisEventsKeyMap = <String, int>{};
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for (var i = 0; i < controller.timeline!.events.length; i++) {
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thisEventsKeyMap[controller.timeline!.events[i].eventId] = i;
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for (var i = 0; i < events.length; i++) {
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thisEventsKeyMap[events[i].eventId] = i;
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}
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return SelectionArea(
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@ -71,7 +75,7 @@ class ChatEventList extends StatelessWidget {
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}
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// Request history button or progress indicator:
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if (i == controller.timeline!.events.length + 1) {
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if (i == events.length + 1) {
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if (controller.timeline!.isRequestingHistory) {
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return const Center(
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child: CircularProgressIndicator.adaptive(strokeWidth: 2),
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@ -87,46 +91,43 @@ class ChatEventList extends StatelessWidget {
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}
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return const SizedBox.shrink();
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}
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i--;
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// The message at this index:
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final event = controller.timeline!.events[i - 1];
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final event = events[i];
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return AutoScrollTag(
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key: ValueKey(event.eventId),
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index: i - 1,
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index: i,
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controller: controller.scrollController,
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child: event.isVisibleInGui
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? Message(
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event,
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onSwipe: () => controller.replyAction(replyTo: event),
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onInfoTab: controller.showEventInfo,
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onAvatarTab: (Event event) => showAdaptiveBottomSheet(
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context: context,
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builder: (c) => UserBottomSheet(
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user: event.senderFromMemoryOrFallback,
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outerContext: context,
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onMention: () => controller.sendController.text +=
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'${event.senderFromMemoryOrFallback.mention} ',
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),
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),
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onSelect: controller.onSelectMessage,
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scrollToEventId: (String eventId) =>
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controller.scrollToEventId(eventId),
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longPressSelect: controller.selectedEvents.isNotEmpty,
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selected: controller.selectedEvents
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.any((e) => e.eventId == event.eventId),
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timeline: controller.timeline!,
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displayReadMarker:
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controller.readMarkerEventId == event.eventId &&
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controller.timeline?.allowNewEvent == false,
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nextEvent: i < controller.timeline!.events.length
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? controller.timeline!.events[i]
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: null,
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)
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: const SizedBox.shrink(),
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child: Message(
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event,
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onSwipe: () => controller.replyAction(replyTo: event),
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onInfoTab: controller.showEventInfo,
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onAvatarTab: (Event event) => showAdaptiveBottomSheet(
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context: context,
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builder: (c) => UserBottomSheet(
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user: event.senderFromMemoryOrFallback,
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outerContext: context,
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onMention: () => controller.sendController.text +=
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'${event.senderFromMemoryOrFallback.mention} ',
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),
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),
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onSelect: controller.onSelectMessage,
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scrollToEventId: (String eventId) =>
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controller.scrollToEventId(eventId),
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longPressSelect: controller.selectedEvents.isNotEmpty,
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selected: controller.selectedEvents
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.any((e) => e.eventId == event.eventId),
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timeline: controller.timeline!,
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displayReadMarker:
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controller.readMarkerEventId == event.eventId &&
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controller.timeline?.allowNewEvent == false,
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nextEvent: i + 1 < events.length ? events[i + 1] : null,
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),
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);
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},
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childCount: controller.timeline!.events.length + 2,
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childCount: events.length + 2,
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findChildIndexCallback: (key) =>
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controller.findChildIndexCallback(key, thisEventsKeyMap),
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),
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