void ParseBrokenRhythm()
{
if (voice == null || voice.items.Count == 0)
{
throw new ParseException($"Illegal broken Rhythm marker at {lineNum}, {index}");
}
char symbol = currentLine[index];
brokenRhythm = symbol == '>' ? BrokenRhythm.DotHalf : BrokenRhythm.HalfDot;
ReadUntil((char ch) => { return(ch != symbol); }, out string brokenRhythmStr);
brokenRhythmCount = brokenRhythmStr.Length;
}
void UpdateBrokenRhythm()
{
if (brokenRhythm == BrokenRhythm.None)
{
return;
}
if (voice.items.Count < 2)
{
throw new ParseException($"Unable to apply broken rhythm to item near {lineNum}, {index}");
}
var itemA = voice.items[voice.items.Count - 2] as Duration;
var itemB = voice.items[voice.items.Count - 1] as Duration;
if (itemA == null || itemB == null)
{
throw new ParseException($"Unable to apply broken rhythm to item near {lineNum}, {index}");
}
Duration halfItem, dotItem;
if (brokenRhythm == BrokenRhythm.DotHalf)
{
dotItem = itemA;
halfItem = itemB;
}
else
{
dotItem = itemB;
halfItem = itemA;
}
dotItem.dotCount = brokenRhythmCount;
var duration = ParserUtil.lengthDurations[halfItem.length] * (1.0f / (1 << brokenRhythmCount));
ParserUtil.ParseDuration(duration, out Length l, out int dots);
halfItem.length = l;
halfItem.dotCount = dots;
brokenRhythm = BrokenRhythm.None;
}
