/// <summary>
/// Tries to move a TimelineClip to a different track. Validates that the destination track can accept the clip before performing the move.
/// Fails if the clip's PlayableAsset is null, the current and destination tracks are the same or the destination track cannot accept the clip.
/// </summary>
/// <param name="clip">Clip that is being moved</param>
/// <param name="destinationTrack">Desired destination track</param>
/// <exception cref="System.ArgumentNullException">Thrown if <paramref name="clip"/> or <paramref name="destinationTrack"/> are null</exception>
/// <exception cref="System.InvalidOperationException">Thrown if the PlayableAsset in the TimelineClip is null</exception>
/// <exception cref="System.InvalidOperationException">Thrown if the current parent track and destination track are the same</exception>
/// <exception cref="System.InvalidOperationException">Thrown if the destination track cannot hold tracks of the given type</exception>
public static void MoveToTrack(this TimelineClip clip, TrackAsset destinationTrack)
{
if (clip == null)
{
throw new ArgumentNullException($"'this' argument for {nameof(MoveToTrack)} cannot be null.");
}
if (destinationTrack == null)
{
throw new ArgumentNullException("Cannot move TimelineClip to a null track.");
}
TrackAsset parentTrack = clip.GetParentTrack();
Object asset = clip.asset;
// If the asset is null we cannot validate its type against the destination track
if (asset == null)
{
throw new InvalidOperationException("Cannot move a TimelineClip to a different track if the TimelineClip's PlayableAsset is null.");
}
if (parentTrack == destinationTrack)
{
throw new InvalidOperationException($"TimelineClip is already on {destinationTrack.name}.");
}
if (!destinationTrack.ValidateClipType(asset.GetType()))
{
throw new InvalidOperationException($"Track {destinationTrack.name} cannot contain clips of type {clip.GetType().Name}.");
}
MoveToTrack_Impl(clip, destinationTrack, asset, parentTrack);
}
