fix: make playground scroll not scroll down when not needed#8676
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Important Review skippedAuto incremental reviews are disabled on this repository. Please check the settings in the CodeRabbit UI or the You can disable this status message by setting the WalkthroughThe changes adjust the scroll behavior logic in the chat view and anchor components. The scroll detection threshold is increased, and the logic for toggling scroll behavior between "smooth" and "instant" is refined. Additionally, scroll behavior is now set to "smooth" when chat history updates, and effect dependencies are updated for more precise control. Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant ChatView
participant ChatScrollAnchor
participant Store
User->>ChatView: Scrolls or new message arrives
ChatView->>Store: setPlaygroundScrollBehaves("smooth") (on chat history update)
ChatView->>ChatScrollAnchor: Updates trackVisibility
ChatScrollAnchor->>ChatScrollAnchor: useEffect triggers on trackVisibility
alt trackVisibility.category == "error"
ChatScrollAnchor->>ChatScrollAnchor: Scroll with playgroundScrollBehaves
ChatScrollAnchor->>ChatScrollAnchor: Delayed smooth scroll after 400ms
else non-error category
ChatScrollAnchor->>ChatScrollAnchor: Scroll with playgroundScrollBehaves
alt playgroundScrollBehaves == "smooth"
ChatScrollAnchor->>Store: setPlaygroundScrollBehaves("instant")
ChatScrollAnchor->>ChatScrollAnchor: Delayed instant scroll after 200ms
end
end
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Actionable comments posted: 1
🔭 Outside diff range comments (1)
src/frontend/src/modals/IOModal/components/chatView/components/chat-scroll-anchor.tsx (1)
27-50: Clarify the scroll behavior toggle logic.The new toggle mechanism for non-error categories appears to have redundant logic:
- It scrolls with the current
playgroundScrollBehavesvalue- If that value is "smooth", it immediately switches to "instant"
- Then after 200ms, it scrolls again with "instant" behavior
This creates two scroll calls and the second one seems unnecessary since the behavior is already set to "instant". Consider simplifying this logic or clarifying the intended behavior.
scrollRef.current.scrollIntoView({ behavior: playgroundScrollBehaves, }); - if (playgroundScrollBehaves === "smooth") { - setPlaygroundScrollBehaves("instant"); - setTimeout(() => { - if (!scrollRef.current) return; - scrollRef.current.scrollIntoView({ - behavior: "instant", - }); - }, 200); - } + if (playgroundScrollBehaves === "smooth") { + setPlaygroundScrollBehaves("instant"); + }
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📒 Files selected for processing (2)
src/frontend/src/modals/IOModal/components/chatView/components/chat-scroll-anchor.tsx(2 hunks)src/frontend/src/modals/IOModal/components/chatView/components/chat-view.tsx(1 hunks)
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`src/frontend/**/*.{ts,tsx,js,jsx}`: All React and TypeScript/JavaScript source files for the frontend must reside under src/frontend/ and use .ts, .tsx, .js, or .jsx extensions.
src/frontend/**/*.{ts,tsx,js,jsx}: All React and TypeScript/JavaScript source files for the frontend must reside under src/frontend/ and use .ts, .tsx, .js, or .jsx extensions.
src/frontend/src/modals/IOModal/components/chatView/components/chat-view.tsxsrc/frontend/src/modals/IOModal/components/chatView/components/chat-scroll-anchor.tsx
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🔇 Additional comments (4)
src/frontend/src/modals/IOModal/components/chatView/components/chat-view.tsx (4)
194-194: Good improvement to scroll detection threshold.Increasing the bottom detection threshold from 3 to 30 pixels provides a more forgiving trigger for auto-scroll behavior, reducing unwanted scroll interruptions due to minor pixel variations.
206-208: Correct addition of scroll behavior state management.The
setPlaygroundScrollBehavessetter is properly imported and will be used to coordinate scroll behavior between components.
210-213: Good initialization of smooth scrolling behavior.Setting the scroll behavior to "smooth" and enabling scrolling when chat history changes ensures a consistent and pleasant initial scrolling experience, aligning well with the PR objectives.
200-200: To fully understand the impact of this change, let’s pull in the surrounding scroll handler and auto-scroll effect:#!/bin/bash echo "=== chat-view.tsx (lines 1–150) ===" sed -n '1,150p' src/frontend/src/modals/IOModal/components/chatView/components/chat-view.tsx echo "=== chat-view.tsx (lines 140–260) ===" sed -n '140,260p' src/frontend/src/modals/IOModal/components/chatView/components/chat-view.tsx echo "=== Auto-scroll useEffect (chatHistory) ===" rg -C5 "chatHistory" src/frontend/src/modals/IOModal/components/chatView/components/chat-view.tsx
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| }, [canScroll, trackVisibility]); | ||
| }, [trackVisibility]); |
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Fix stale closure issue with canScroll dependency.
The useEffect uses canScroll in its condition but canScroll is not included in the dependency array. This creates a stale closure where the effect may use outdated values of canScroll, potentially breaking the scroll functionality.
- }, [trackVisibility]);
+ }, [trackVisibility, canScroll]);Or alternatively, if the intent is to only trigger on trackVisibility changes, consider restructuring the logic to not depend on canScroll within the effect.
🤖 Prompt for AI Agents
In
src/frontend/src/modals/IOModal/components/chatView/components/chat-scroll-anchor.tsx
at line 52, the useEffect hook uses the variable canScroll inside its logic but
does not include canScroll in the dependency array, causing a stale closure
issue. To fix this, add canScroll to the dependency array so the effect re-runs
whenever canScroll changes, ensuring it uses the latest value. Alternatively, if
the effect should only depend on trackVisibility, refactor the effect logic to
avoid using canScroll inside it.
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…-ai#8676) Fixed playground scroll Co-authored-by: Carlos Coelho <80289056+carlosrcoelho@users.noreply.github.com>
…-ai#8676) Fixed playground scroll Co-authored-by: Carlos Coelho <80289056+carlosrcoelho@users.noreply.github.com>
3 participants
This pull request refines the scrolling behavior in the chat view component to improve user experience, particularly around smooth and instant scrolling transitions. It adjusts the logic for determining when to scroll and modifies how scrolling behavior is managed.
Improvements to scrolling behavior:
Refined scroll behavior logic in
ChatScrollAnchor: Simplified the condition for usingplaygroundScrollBehavesin thescrollIntoViewmethod and added logic to switch between "smooth" and "instant" scrolling dynamically, ensuring smoother transitions when necessary. (src/frontend/src/modals/IOModal/components/chatView/components/chat-scroll-anchor.tsx, [1] [2]Adjusted bottom scroll detection in
ChatView: Increased the threshold for detecting if the user is at the bottom of the chat from3to30pixels, which provides a more forgiving margin for triggering auto-scroll behavior. (src/frontend/src/modals/IOModal/components/chatView/components/chat-view.tsx, src/frontend/src/modals/IOModal/components/chatView/components/chat-view.tsxL194-R211)Initialized smooth scrolling on chat history load: Added a
useEffecthook to set the default scrolling behavior to "smooth" when the chat history changes, ensuring a consistent initial experience. (src/frontend/src/modals/IOModal/components/chatView/components/chat-view.tsx, src/frontend/src/modals/IOModal/components/chatView/components/chat-view.tsxL194-R211)Summary by CodeRabbit