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修复 thinking block 和 subagent block 在流式输出时会强行重置block内部滚动条位置 #127

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修复 thinking block 和 subagent block 在流式输出时会强行重置block内部滚动条位置 #127

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0a49bd6
fix: smart scroll for capsule reasoning block
SsparKluo Jun 24, 2026
d326eb3
fix: smart scroll for subagent task view
SsparKluo Jun 24, 2026
0c729b0
fix: unify smart scroll threshold to 60px
SsparKluo Jun 24, 2026
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14 changes: 11 additions & 3 deletions src/features/message/parts/ReasoningPartView.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@ export const ReasoningPartView = memo(function ReasoningPartView({ part, isStrea
const summaryContainerRef = useRef<HTMLDivElement>(null)
const summaryMeasureRef = useRef<HTMLSpanElement>(null)
const [summaryOverflow, setSummaryOverflow] = useState(false)
const [isAtBottom, setIsAtBottom] = useState(true)

const collapsedPreview = useMemo(() => (displayText || '').replace(/\s+/g, ' ').trim(), [displayText])
const thoughtDurationLabel = useMemo(() => {
Expand Down Expand Up @@ -71,12 +72,19 @@ export const ReasoningPartView = memo(function ReasoningPartView({ part, isStrea
}
}, [isPartStreaming, hasContent])

const handleCapsuleScroll = useCallback(() => {
const el = scrollAreaRef.current
if (!el) return
const atBottom = el.scrollHeight - el.scrollTop - el.clientHeight < 60
setIsAtBottom(atBottom)
}, [])

useEffect(() => {
if (reasoningDisplayMode !== 'capsule') return
if (isPartStreaming && expanded && scrollAreaRef.current) {
if (isPartStreaming && expanded && isAtBottom && scrollAreaRef.current) {
scrollAreaRef.current.scrollTop = scrollAreaRef.current.scrollHeight
}
}, [displayText, isPartStreaming, expanded, reasoningDisplayMode])
}, [displayText, isPartStreaming, expanded, isAtBottom, reasoningDisplayMode])

useEffect(() => {
if (reasoningDisplayMode !== 'italic' && reasoningDisplayMode !== 'markdown') return
Expand Down Expand Up @@ -246,7 +254,7 @@ export const ReasoningPartView = memo(function ReasoningPartView({ part, isStrea
>
<div className="min-h-0 min-w-0 overflow-hidden" style={{ clipPath: 'inset(0 -100% 0 -100%)' }}>
{shouldRenderBody && (
<ScrollArea ref={scrollAreaRef} maxHeight={192} className="border-t border-border-300/20 bg-bg-200/30">
<ScrollArea ref={scrollAreaRef} maxHeight={192} onScroll={handleCapsuleScroll} className="border-t border-border-300/20 bg-bg-200/30">
<div className="px-2 py-2 text-text-300 text-[length:var(--fs-sm)] font-mono whitespace-pre-wrap break-words overflow-x-hidden">
{displayText}
</div>
Expand Down
17 changes: 13 additions & 4 deletions src/features/message/tools/renderers/TaskRenderer.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -271,6 +271,7 @@ interface SubSessionViewProps {
const SubSessionView = memo(function SubSessionView({ sessionId }: SubSessionViewProps) {
const { t } = useTranslation('message')
const scrollRef = useRef<HTMLDivElement>(null)
const isAtBottomRef = useRef(true)
const loadedRef = useRef(false)
const subSessionMaxHeight = useResponsiveMaxHeight(0.25, 120, 240)

Expand Down Expand Up @@ -310,11 +311,18 @@ const SubSessionView = memo(function SubSessionView({ sessionId }: SubSessionVie
})
}, [sessionId])

// 自动滚动
const handleScroll = useCallback(() => {
const el = scrollRef.current
if (!el) return
isAtBottomRef.current = el.scrollHeight - el.scrollTop - el.clientHeight < 60
}, [])

// 自动滚动（仅在用户已在底部时跟随）
useEffect(() => {
if (scrollRef.current && isStreaming) {
scrollRef.current.scrollTop = scrollRef.current.scrollHeight
}
if (!isStreaming) return
const el = scrollRef.current
if (!el || !isAtBottomRef.current) return
el.scrollTop = el.scrollHeight
}, [messages, isStreaming])

// 过滤有内容的消息
Expand All @@ -340,6 +348,7 @@ const SubSessionView = memo(function SubSessionView({ sessionId }: SubSessionVie
{/* Messages */}
<div
ref={scrollRef}
onScroll={handleScroll}
className="overflow-y-auto custom-scrollbar px-3 py-2 space-y-2"
style={{ maxHeight: subSessionMaxHeight }}
>
Expand Down