public static int FindLastIndex(this IPlaylist playlist, Func <IPlaylistItem, bool> predicate)
{
return(playlist.FindLastIndex(playlist.Count - 1, predicate));
}
private void AddTiming2(DateTime startTime, IPlaySource playSource)
{
// 验证操作的合法性。
ValidatePlayDuration(playSource.PlayRange.Duration);
ValidateStartTime(startTime, false);
EnsureNoTimingConflict(startTime, playSource.PlayRange.Duration);
// 触发事件前置事件。
List <PlaybillItem> tempList = new List <PlaybillItem>();
// 重新计算调度信息。
DateTime beginTime;
var prevIndex = _playlist.FindLastIndex(i => !i.IsSkipped() && i.ScheduleInfo.StopTime <= startTime);
if (prevIndex == -1)
{
if (_playlist.Count == 0)
{
if (_playlist.HasMinStartTime() && _playlist.MinStartTime.Value < startTime)
{
beginTime = _playlist.MinStartTime.Value;
}
else
{
beginTime = startTime;
}
}
else
{
beginTime = _playlist[0].ScheduleInfo.StartTime; // startTime;
beginTime = beginTime > startTime ? startTime : beginTime;
}
// [prevIndex+1, index-1], 注：index-prevIndex+1
// 替换范围：[prevIndex+1, index-1] (删除的起始索引0==prevIndex+1,数量index==index-prevIndex-1)
}
else
{
beginTime = _playlist[prevIndex].ScheduleInfo.StopTime;
// 注：prevIndex可能等于index-1。
// 当prevIndex小于index-1时。
// 替换范围：[prevIndex + 1, index-1] (删除的起始索引prevIndex + 1,数量index-prevIndex-1 )
// 当prevIndex等于index-1时。(删除的起始索引prevIndex + 1==index,数量index-prevIndex-1==0 )
// 在index处插入0个或1个。
}
DateTime endTime;
var nextIndex = _playlist.FindFirstIndex(prevIndex + 1, i => !i.IsSkipped() && i.ScheduleInfo.ScheduleMode == ScheduleMode.Timing && i.ScheduleInfo.StartTime > startTime);
//beginTime = playItem.ScheduleInfo.StopTime;
if (nextIndex == -1)
{
endTime = DateTime.MaxValue;
nextIndex = _playlist.Count;
// [index + 1, _playlist.Count - 1], 注：index + 1可能等于_playlist.Count - 1
// 替换范围：[index + 1, _playlist.Count - 1] (删除的起始索引index + 1, 数量nextIndex-index-1==_playlist.Count-index-1)
}
else
{
endTime = _playlist[nextIndex].ScheduleInfo.StartTime;
// 注：nextIndex可能等于index+1。
// 当nextIndex大于index+1时。
// 替换范围：[index+1, nextIndex-1] (删除的起始索引index+1,数量nextIndex-index-1 )
// 当nextIndex等于index+1时。(删除的起始索引index+1, 数量nextIndex-index-1==0 )
// 在index+1处插入0个或1个。
}
PlaybillItem playItem = PlaybillItem.CreateTiming(startTime, new NormalPlaySource(playSource), false);
Debug.Assert(beginTime <= endTime);
Debug.Assert(beginTime <= startTime && endTime > playItem.ScheduleInfo.StopTime);
for (int i = prevIndex + 1; i < nextIndex; i++)
{
tempList.Add(_playlist[i].PlaybillItem);
//builder.Add(_playlist[i].PlaybillItem);
}
// case 1: prevIndex + 1==nextIndex-1，替换起始位置prevIndex + 1，删除数量1 (nextIndex-1-prevIndex)
// case 2: prevIndex + 1<nextIndex-1，替换起始位置prevIndex + 1，删除数量1 (nextIndex-1-prevIndex)
// case 3: prevIndex + 1>nextIndex-1
// 替换范围为[prevIndex + 1, nextIndex-1]
// 触发事件（表示操作完成）。
}
