fret-marker-layer.kt

@Composable
private fun FretMarkerLayer(
    fromFret: Int,
    toFret: Int,
    markers: List<Marker>,
    scale: Float = 1.5f
) {
    val fretRange = toFret - fromFret

    Table(columns = fretRange) {
        repeat(6) { index ->
            val stringNumber = 6 - index
            tableRow {
                for (fretNumber in fromFret until toFret) {
                    // the gutter
                    if (fretNumber == fromFret) {
                        val openNote = markers.findOpenStringOrNull(stringNumber)
                        val mute = markers.findMutedStringOrNull(stringNumber)
                        when {
                            openNote != null -> FretMarker(openNote, scale)
                            mute != null -> MutedMarker(mute, scale)
                            else -> FretMarker(null, scale)
                        }
                    } else {
                        val marker = markers.findFrettedNoteOrNull(stringNumber, fretNumber)
                        FretMarker(marker, scale)
                    }
                }
            }
        }
    }
}