Clément Fiere
30 lines
1.3 KiB
TypeScript
30 lines
1.3 KiB
TypeScript
"use client";
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import { useAppStore } from "@/components/state-provider";
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import { getStoredAutoScrollEnabled } from "@/lib/local-storage";
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import { isTranscriptAutoScrollEnabled } from "@/lib/state/slices/ui/transcript-auto-scroll-selectors";
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/**
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* Reactive read of the per-session auto-scroll preference. Shared by the
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* toggle button and both message list renderers so all three consistently
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* default new sessions to enabled. Non-reactive reads/writes (from scroll
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* listeners, imperative Virtuoso callbacks) go straight through
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* `useAppStore.getState()` instead — see message-list-native.tsx /
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* message-list-virtuoso.tsx.
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*
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* Falls back to the sessionStorage-persisted preference (see
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* setTranscriptAutoScrollEnabled) when the in-memory store hasn't seen this
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* session yet — e.g. right after a hard reload or reopening a task in a new
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* tab within the same browser session.
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*/
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export function useTranscriptAutoScrollEnabled(sessionId: string | null): boolean {
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return useAppStore((state) => {
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const { enabledBySessionId } = state.transcriptAutoScroll;
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if (sessionId && !(sessionId in enabledBySessionId)) {
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const stored = getStoredAutoScrollEnabled(sessionId);
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if (stored !== null) return stored;
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}
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return isTranscriptAutoScrollEnabled(enabledBySessionId, sessionId);
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});
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}
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