apps/web/src/components/editor/panels/properties/hooks/use-element-playhead.ts


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import { useEditor } from "@/hooks/use-editor";
import { getElementLocalTime } from "@/lib/animation";
import { TIME_EPSILON_SECONDS } from "@/constants/animation-constants";

export function useElementPlayhead({
	startTime,
	duration,
}: {
	startTime: number;
	duration: number;
}) {
	const playheadTime = useEditor((editor) => editor.playback.getCurrentTime());
	const localTime = getElementLocalTime({
		timelineTime: playheadTime,
		elementStartTime: startTime,
		elementDuration: duration,
	});
	const isPlayheadWithinElementRange =
		playheadTime >= startTime - TIME_EPSILON_SECONDS &&
		playheadTime <= startTime + duration + TIME_EPSILON_SECONDS;

	return { localTime, isPlayheadWithinElementRange };
}