/// <summary>
/// partを挿入する
/// (既存partが増えると挿入位置を特定するのに時間がかかるようになるので注意)
/// </summary>
/// <param name="StartTick">絶対値によるTick値</param>
/// <param name="prt">part</param>
public void insertPart(int StartTick, MIDIPart prt)
{
if (prt == null)
{
return;
}
prt.StartTick = StartTick;
if (this.Part == null)
{
this.Part = new List <MIDIPart>();
}
if (this.Part.Count == 0 || this.mStartIndex == null)//初めのprt
{
prt.AfterIndex = null;
prt.BeforeIndex = null;
prt.Number = this.mNumber;
this.Part.Add(prt);
this.mStartIndex = 0;
this.mEndIndex = 0;
this.mCounter = 1;
this.mNumber++;
return;
}
//遅くなる原因になっているループ
MIDIPart pPrt = getStartPart();
while (true)
{
if (pPrt.StartTick > prt.StartTick)
{
pPrt = getPrevPart(pPrt);
break;
}
MIDIPart ppPrt = getNextPart(pPrt);
if (ppPrt == null)
{
break;
}
pPrt = ppPrt;
}
prt.BeforeIndex = pPrt.Number;
prt.AfterIndex = pPrt.AfterIndex;
prt.Number = this.mNumber;
pPrt.AfterIndex = prt.Number;
this.Part.Add(prt);
if (prt.AfterIndex == null)
{
this.mEndIndex = this.mNumber;
}
else
{
pPrt = getNextPart(prt);
pPrt.BeforeIndex = prt.Number;
}
this.mCounter++;
this.mNumber++;
}
//指定したpartの前の小節を得る
public MIDIPart getPrevPart(MIDIPart prt)
{
if (prt == null || prt.BeforeIndex == null)
{
return(null);
}
return(Part[(int)prt.BeforeIndex]);
}
//指定したpartの次のpartを得る
public MIDIPart getNextPart(MIDIPart prt)
{
if (prt == null || prt.AfterIndex == null)
{
return(null);
}
return(Part[(int)prt.AfterIndex]);
}
//インデックスからpartを得る
public MIDIPart searchPart(int index)
{
int st_d = int.MaxValue;
int ed_d = int.MaxValue;
int now_d = int.MaxValue;
int mode = -1;
if (this.mStartIndex != null)
{
st_d = Math.Abs((int)this.mStartIndex - index);
}
if (this.mEndIndex != null)
{
ed_d = Math.Abs((int)this.mEndIndex - index);
}
if (this.NowPart != null)
{
now_d = Math.Abs(this.NowPart.Number - index);
}
MIDIPart prt = null;
if (st_d < ed_d && st_d < now_d)
{
prt = this.getStartPart();
mode = 0;
}
else if (ed_d < st_d && ed_d < now_d)
{
prt = this.getEndPart();
mode = 1;
}
else if (now_d <= st_d && now_d <= ed_d)
{
prt = this.NowPart;
if (prt.Number < index)
{
mode = 0;
}
else
{
mode = 1;
}
}
else
{
return(null);
}
switch (mode)
{
case 0:
while (prt != null)
{
if (prt.Number == index)
{
return(prt);
}
prt = this.getNextPart(prt);
}
break;
case 1:
while (prt != null)
{
if (prt.Number == index)
{
return(prt);
}
prt = this.getPrevPart(prt);
}
break;
}
return(null);
}