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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | 5x 496x 5x 89x 89x 111x 67x 89x | // SPDX-License-Identifier: GPL-3.0-only
// Copyright (C) 2026 Max Boksem. See NOTICE for additional terms under GPLv3 section 7.
import type { SubtitleCue } from "./types";
/** The cue to show `time` seconds into the subtitles, or undefined for none. */
export const cueAt = (cues: SubtitleCue[], time: number): SubtitleCue | undefined =>
cues.find((cue) => time >= cue.start && time <= cue.end);
/**
* Seconds from `time` to the next start or end of a cue, or null when none
* comes after it. A cue shows up to and including its end, so the end of a
* cue that's showing counts, even when `time` is on it.
*/
export const nextCueChange = (cues: SubtitleCue[], time: number): number | null => {
let next = Infinity;
for (const cue of cues) {
if (cue.start > time) next = Math.min(next, cue.start);
else if (cue.end >= time) next = Math.min(next, cue.end);
}
return next === Infinity ? null : next - time;
};
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