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use scene::SceneTracks;
use super::InsertDirection;
use crate::types::TrackType;
pub fn get_default_insert_index_for_track(tracks: &SceneTracks, track_type: TrackType) -> usize {
if track_type == TrackType::Audio {
return tracks.overlay.len() + 1 + tracks.audio.len();
}
if track_type == TrackType::Effect {
return 0;
}
tracks.overlay.len()
}
pub fn get_highest_insert_index_for_track(tracks: &SceneTracks, track_type: TrackType) -> usize {
if track_type == TrackType::Audio {
return tracks.overlay.len() + 1;
}
0
}
pub struct PreferredNewTrackPlacement {
pub insert_index: usize,
pub insert_position: Option<InsertDirection>,
}
pub fn resolve_preferred_new_track_placement(
tracks: &SceneTracks,
track_type: TrackType,
preferred_index: usize,
direction: InsertDirection,
) -> PreferredNewTrackPlacement {
let track_count = tracks.overlay.len() + 1 + tracks.audio.len();
if track_count == 0 {
return PreferredNewTrackPlacement {
insert_index: 0,
insert_position: (track_type == TrackType::Audio)
.then_some(InsertDirection::Below),
};
}
let safe_preferred_index = preferred_index.min(track_count - 1);
let main_track_index = tracks.overlay.len();
if track_type == TrackType::Audio {
if safe_preferred_index <= main_track_index {
return PreferredNewTrackPlacement {
insert_index: main_track_index + 1,
insert_position: Some(InsertDirection::Below),
};
}
return PreferredNewTrackPlacement {
insert_index: match direction {
InsertDirection::Above => safe_preferred_index,
InsertDirection::Below => safe_preferred_index + 1,
},
insert_position: Some(direction),
};
}
let insert_index = match direction {
InsertDirection::Above => safe_preferred_index,
InsertDirection::Below => safe_preferred_index + 1,
};
if insert_index > main_track_index {
return PreferredNewTrackPlacement {
insert_index: main_track_index,
insert_position: Some(InsertDirection::Above),
};
}
PreferredNewTrackPlacement {
insert_index,
insert_position: Some(direction),
}
}
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