feat: improve chat message animations #7890
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Reviewer's GuideThis pull request significantly improves chat message animations and list behavior by refactoring the main chat list to use Sequence Diagram for New Message Handling in ChatAnimatedListsequenceDiagram
participant User as U
participant ChatController as CC
participant ChatAnimatedListState as CALS
participant ItemScrollController as ISC
CC->>CALS: New message received (triggers _onInserted)
CALS->>CALS: _onInserted(position, data)
alt If message is the last and by current user
CALS->>CALS: _scrollLastMessageToTop(data)
CALS->>ISC: scrollTo(index, duration, curve)
end
Sequence Diagram for User Scrolling to Bottom of ChatsequenceDiagram
actor User
participant ScrollToBottomButton as STBB
participant ChatAnimatedListState as CALS
participant ItemScrollController as ISC
participant "_scrollToBottomController (AnimationController)" as AnimCtrl
User->>STBB: Clicks "Scroll to Bottom"
STBB->>CALS: Calls _handleScrollToBottom()
CALS->>AnimCtrl: reverse() (hides button)
CALS->>ISC: scrollTo(index, alignment, duration, curve) to scroll to end
Class Diagram: ChatAnimatedListState RefactorclassDiagram
class ChatAnimatedListState {
-ScrollOffsetController scrollOffsetController
-ItemScrollController itemScrollController
-ScrollOffsetListener scrollOffsetListener
-ItemPositionsListener itemPositionsListener
-int _lastUserMessageIndex
-bool _isScrollingToBottom
+initState()
+dispose()
+build(BuildContext context) Widget
-_handleScrollToBottom() void
-_handleToggleScrollToBottom() void
-_onInserted(int position, Message data) void
-_scrollLastMessageToTop(Message data) void
}
note for ChatAnimatedListState "Refactored to use ScrollablePositionedList for improved scrolling and animation. Removed _userHasScrolled and related logic. Updated message insertion and scroll handling methods."
Class Diagram: BulletedListIcon RefactorclassDiagram
BulletedListIcon --|> StatefulWidget
_BulletedListIconState --|> State
BulletedListIcon ..> _BulletedListIconState : creates
class BulletedListIcon {
+Node node
+final List~String~ bulletedListIcons
+createState() _BulletedListIconState
}
class _BulletedListIconState {
-int index
-double size
+void initState()
+Widget build(BuildContext context)
-int get level
}
note for BulletedListIcon "Refactored from StatelessWidget to StatefulWidget to dynamically update icon based on nesting level, improving rendering performance and correctness."
Class Diagram: New ChatMessage WidgetclassDiagram
ChatMessage --|> StatelessWidget
class ChatMessage {
+final Message message
+final Widget child
+final AlignmentGeometry sentMessageAlignment
+final AlignmentGeometry receivedMessageAlignment
+final EdgeInsetsGeometry padding
+Widget build(BuildContext context)
}
note for ChatMessage "New widget to encapsulate chat message styling and alignment logic, promoting reusability and consistency."
Class Diagram: ReminderBloc Logging UpdateclassDiagram
class ReminderBloc {
-final DeepCollectionEquality _deepEquality
+ReminderBloc()
+StreamSubscription _fetchAllRemindersSubscription
}
note for ReminderBloc "Updated reminder fetching logic to use DeepCollectionEquality for comparing reminder ID sets. This reduces unnecessary logging when the reminder list hasn't actually changed."
Class Diagram: LoadChatMessageStatusReady UpdateclassDiagram
class LoadChatMessageStatusReady {
+View view
+UserProfilePB userProfile
+Widget build(BuildContext context)
}
LoadChatMessageStatusReady ..> ChatMessage : uses in chatMessageBuilder
LoadChatMessageStatusReady ..> ChatAnimationListWidget : configures
class ChatMessage
class ChatAnimationListWidget
note for LoadChatMessageStatusReady "Updated to use the new ChatMessage widget for rendering messages. Removed 'enableReversedList' property from ChatAnimationListWidget as part of the list behavior refactor."
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Hey @LucasXu0 - I've reviewed your changes - here's some feedback:
- The transition from
SliverAnimatedListtoScrollablePositionedListmight alter how individual message insertion animations are handled; verify this aligns with the intended animation improvements. - The chat now scrolls the current user's last message towards the top on new message arrival; confirm this specific scrolling behavior is intended for all new messages.
- The fixed
400pixel padding in chat lists could be made more adaptive, perhaps by relating it to screen height or making it a themeable constant.
Here's what I looked at during the review
- 🟡 General issues: 1 issue found
- 🟢 Security: all looks good
- 🟢 Testing: all looks good
- 🟢 Complexity: all looks good
- 🟢 Documentation: all looks good
Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
| @@ -168,7 +168,7 @@ class ChatAnimatedListReversedState extends State<ChatAnimatedListReversed> | |||
| slivers: <Widget>[ | |||
| SliverPadding( | |||
| padding: EdgeInsets.only( | |||
| top: widget.bottomPadding ?? 0, | |||
| top: 400, | |||
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question: Hard-coded top padding value may need review.
Verify that the 400px top padding is intentional and adapts correctly to various screen sizes and orientations.
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Summary by Sourcery
Improve chat message animations and scrolling behavior in the AppFlowy chat interface
New Features:
Enhancements:
Chores: