/// <summary>
/// Gets all buckets before a duration, cutting a bucket in half if needed.
/// Will return empty list if at start. If fraction has specified then get half bucket if durationAt
/// intersect with exist bucket
/// </summary>
/// <param name="durationAt">The duration at.</param>
/// <returns></returns>
private PersonalContourBucket[] GetBucketsBeforeDuration(long durationAt)
{
List <PersonalContourBucket> retVal = new List <PersonalContourBucket>();
long currentDuration = 0;
PersonalContourBucket personalBucket = null;
if (durationAt != 0)
{
foreach (AbstractContourBucket bucket in base.ContourBuckets)
{
personalBucket = bucket as PersonalContourBucket;
if (personalBucket != null)
{
currentDuration = personalBucket.ElapsedDuration;
if (currentDuration >= durationAt)
{
retVal.Add(personalBucket);
break;
}
retVal.Add(personalBucket);
}
}
}
return(retVal.ToArray());
}
/// <summary>
/// Set the duration of the personal contour. This implies either truncating the bucket array or changing the last bucket
/// to accommodate the new duration. Note that only the last bucket will be modified. The number of buckets will never increase.
/// Since the buckets themselves are immutable, the last element will most likely be replaced.
/// </summary>
/// <param name="newDuration">The new duration.</param>
/// <param name="actualDuration">The actual duration.</param>
/// <returns></returns>
public override AbstractContour AdjustDuration(long newDuration, long actualDuration)
{
PersonalContour newContour = new PersonalContour();
foreach (AbstractContourBucket bucket in base.ContourBuckets)
{
PersonalContourBucket personalBucket = (PersonalContourBucket)bucket;
newContour.ContourBuckets.Add(personalBucket);
newDuration -= personalBucket.Duration;
if (newDuration <= 0)
{
// adding a negative value
personalBucket.AdjustDuration(newDuration);
newDuration = 0;
//AbstractContour result = newContour.makePacked(); // pack so as to get rid of any trailing empty buckets
}
}
// extend last bucket to account for duration
((PersonalContourBucket)newContour.ContourBuckets[newContour.ContourBuckets.Count - 1]).AdjustDuration(newDuration);
this.ContourBuckets.Clear();
this.ContourBuckets.AddRange(newContour.ContourBuckets);
return(this);
}
