private void CalculatePositionsAndLengths(IEnumerable <string> tabLines)
{
var offset = TabNotes[0].PositionInCharacters;
var tabWidth = GetLastDashPosition(tabLines);
var stepLength = 1M / Convert.ToDecimal(NoteDivision);
tabWidth -= offset;
foreach (var tabNote in TabNotes)
{
tabNote.PositionInCharacters -= offset;
tabNote.TabWidth = tabWidth;
}
for (var i = 0; i < TabNotes.Count; i++)
{
var tabNote = TabNotes[i];
var nextTabNote = (i < TabNotes.Count - 1) ? TabNotes[i + 1] : null;
if (nextTabNote != null)
{
tabNote.LengthInCharacters = nextTabNote.PositionInCharacters - tabNote.PositionInCharacters;
}
else
{
tabNote.LengthInCharacters = tabNote.TabWidth - tabNote.PositionInCharacters;
}
}
foreach (var tabNote in TabNotes)
{
tabNote.Length = Math.Round(tabNote.IdealLengthPercent * NoteDivision, 0) /
Convert.ToDecimal(NoteDivision);
if (tabNote.Length == 0)
{
tabNote.Length = stepLength;
}
}
CalculatePositions(TabNotes);
var remainder = 1M - TabNotes.Sum(x => x.Length);
var stepsToDistribute = Convert.ToInt32(remainder / stepLength);
var removeSteps = stepsToDistribute < 0;
while (Math.Abs(remainder) >= stepLength)
{
var possibilities = new Dictionary <TabNote, List <TabNote> >();
foreach (var tabNote in TabNotes)
{
var possibility = TabNotes.Select(x => x.Clone()).ToList();
var changedTabNote = possibility.FirstOrDefault(x => x.PositionInCharacters == tabNote.PositionInCharacters);
if (changedTabNote == null)
{
continue;
}
if (removeSteps)
{
if (changedTabNote.Length > stepLength)
{
changedTabNote.Length -= stepLength;
possibilities.Add(tabNote, possibility);
}
}
else
{
changedTabNote.Length += stepLength;
possibilities.Add(tabNote, possibility);
}
CalculatePositions(possibility);
}
var tabNoteToChange = possibilities.OrderBy(x => x.Value.Sum(y => y.DifferenceFromIdeal)).FirstOrDefault();
var tentativeChangedTabNote = tabNoteToChange.Value.FirstOrDefault(x => x.PositionInCharacters == tabNoteToChange.Key.PositionInCharacters);
if (tentativeChangedTabNote != null)
{
tabNoteToChange.Key.Length = tentativeChangedTabNote.Length;
}
CalculatePositions(TabNotes);
remainder = 1M - TabNotes.Sum(x => x.Length);
}
foreach (var tabNote in TabNotes)
{
tabNote.Length *= NoteDivision;
}
}
public List <int> GetDistinctNoteNumbers()
{
return(TabNotes.Select(x => x.Number).Distinct().OrderBy(x => x).ToList());
}