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fix(studio): break iframe ref update loop causing flickering #764

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fix(studio): break iframe ref update loop causing flickering #764

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1 change: 1 addition & 0 deletions packages/studio/src/App.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -261,6 +261,7 @@ export function StudioApp() {
const { syncPreviewTimelineHotkey, syncPreviewHistoryHotkey } = appHotkeys;
const handlePreviewIframeRef = useCallback(
(iframe: HTMLIFrameElement | null) => {
if (previewIframeRef.current === iframe) return;
previewIframeRef.current = iframe;
setPreviewIframe(iframe);
syncPreviewTimelineHotkey(iframe);
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6 changes: 4 additions & 2 deletions packages/studio/src/components/nle/NLELayout.tsx
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Expand Up @@ -234,9 +234,11 @@ export const NLELayout = memo(function NLELayout({
const currentLevel = compositionStack[compositionStack.length - 1];
const directUrl = compositionStack.length > 1 ? currentLevel.previewUrl : undefined;

const onIframeRefRef = useRef(onIframeRef);
onIframeRefRef.current = onIframeRef;
useEffect(() => {
onIframeRef?.(iframeRef.current);
}, [compositionStack.length, onIframeRef, refreshKey, iframeRef]);
onIframeRefRef.current?.(iframeRef.current);
}, [compositionStack.length, refreshKey, iframeRef]);

// Save master seek position before drilling down so we can restore it on back-navigation.
// saveSeekPosition() sets pendingSeekRef in useTimelinePlayer which onIframeLoad reads.
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