// Flush fills ragged sequences with the receiver's gap letter so that all sequences are flush.
func (m *Multi) Flush(where int, fill alphabet.Letter) {
if m.IsFlush(where) {
return
}
if where&seq.Start != 0 {
start := m.Start()
for _, r := range m.Seq {
if r.Start()-start < 1 {
continue
}
switch sl := r.Slice().(type) {
case alphabet.Letters:
r.SetSlice(alphabet.Letters(append(fill.Repeat(r.Start()-start), sl...)))
case alphabet.QLetters:
r.SetSlice(alphabet.QLetters(append(alphabet.QLetter{L: fill}.Repeat(r.Start()-start), sl...)))
}
r.SetOffset(start)
}
}
if where&seq.End != 0 {
end := m.End()
for _, r := range m.Seq {
if end-r.End() < 1 {
continue
}
r.(seq.Appender).AppendQLetters(alphabet.QLetter{L: fill}.Repeat(end - r.End())...)
}
}
}
// Format returns a [2]alphabet.Slice representing the formatted alignment of a and b described by the
// list of feature pairs in f, with gap used to fill gaps in the alignment.
func Format(a, b seq.Slicer, f []feat.Pair, gap alphabet.Letter) [2]alphabet.Slice {
var as, aln [2]alphabet.Slice
for i, s := range [2]seq.Slicer{a, b} {
as[i] = s.Slice()
aln[i] = as[i].Make(0, 0)
}
for _, fs := range f {
fc := fs.Features()
for i := range aln {
if fc[i].Len() == 0 {
switch aln[i].(type) {
case alphabet.Letters:
aln[i] = aln[i].Append(alphabet.Letters(gap.Repeat(fc[1-i].Len())))
case alphabet.QLetters:
aln[i] = aln[i].Append(alphabet.QLetters(alphabet.QLetter{L: gap}.Repeat(fc[1-i].Len())))
}
} else {
aln[i] = aln[i].Append(as[i].Slice(fc[i].Start(), fc[i].End()))
}
}
}
return aln
}