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import type {
TrackType,
TimelineTrack,
VideoTrack,
AudioTrack,
GraphicTrack,
TextTrack,
EffectTrack,
} from "@/lib/timeline";
import {
TRACK_CONFIG,
ELEMENT_TYPE_CONFIG,
TRACK_GAP,
} from "@/constants/timeline-constants";
export function canTracktHaveAudio(
track: TimelineTrack,
): track is VideoTrack | AudioTrack {
return track.type === "audio" || track.type === "video";
}
export function canTrackBeHidden(
track: TimelineTrack,
): track is VideoTrack | TextTrack | GraphicTrack | EffectTrack {
return track.type !== "audio";
}
export function getElementClasses({ type }: { type: TrackType }) {
return ELEMENT_TYPE_CONFIG[type].background.trim();
}
export function getTrackHeight({ type }: { type: TrackType }): number {
return TRACK_CONFIG[type].height;
}
export function getCumulativeHeightBefore({
tracks,
trackIndex,
}: {
tracks: Array<{ type: TrackType }>;
trackIndex: number;
}): number {
return tracks
.slice(0, trackIndex)
.reduce(
(sum, track) => sum + getTrackHeight({ type: track.type }) + TRACK_GAP,
0,
);
}
export function getTotalTracksHeight({
tracks,
}: {
tracks: Array<{ type: TrackType }>;
}): number {
const tracksHeight = tracks.reduce(
(sum, track) => sum + getTrackHeight({ type: track.type }),
0,
);
const gapsHeight = Math.max(0, tracks.length - 1) * TRACK_GAP;
return tracksHeight + gapsHeight;
}
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