def _make_leaf_on_pitch(
pitch,
duration,
decrease_durations_monotonically=True,
forbidden_written_duration=None,
use_multimeasure_rests=False,
use_messiaen_style_ties=False,
):
from abjad.tools import scoretools
note_prototype = (
numbers.Number,
str,
pitchtools.NamedPitch,
pitchtools.PitchClass,
)
chord_prototype = (tuple, list)
rest_prototype = (type(None), )
if isinstance(pitch, note_prototype):
leaves = scoretools.make_tied_leaf(
scoretools.Note,
duration,
decrease_durations_monotonically=decrease_durations_monotonically,
forbidden_written_duration=forbidden_written_duration,
pitches=pitch,
use_messiaen_style_ties=use_messiaen_style_ties,
)
elif isinstance(pitch, chord_prototype):
leaves = scoretools.make_tied_leaf(
scoretools.Chord,
duration,
decrease_durations_monotonically=decrease_durations_monotonically,
forbidden_written_duration=forbidden_written_duration,
pitches=pitch,
use_messiaen_style_ties=use_messiaen_style_ties,
)
elif isinstance(pitch, rest_prototype) and not use_multimeasure_rests:
leaves = scoretools.make_tied_leaf(
scoretools.Rest,
duration,
decrease_durations_monotonically=decrease_durations_monotonically,
forbidden_written_duration=forbidden_written_duration,
pitches=None,
use_messiaen_style_ties=use_messiaen_style_ties,
)
elif isinstance(pitch, rest_prototype) and use_multimeasure_rests:
multimeasure_rest = scoretools.MultimeasureRest((1))
multiplier = durationtools.Multiplier(duration)
attach(multiplier, multimeasure_rest)
leaves = (multimeasure_rest, )
else:
message = 'unknown pitch {!r}.'
message = message.format(pitch)
raise ValueError(message)
return leaves
def make_multimeasure_rests(durations):
'''Make multi-measure rests from `durations`:
::
>>> scoretools.make_multimeasure_rests([(4, 4), (7, 4)])
Selection(MultimeasureRest('R1'), MultimeasureRest('R1..'))
Returns list.
'''
from abjad.tools import scoretools
multimeasure_rests = []
for duration in durations:
written_duration = durationtools.Duration(duration)
if not written_duration.is_assignable:
message = 'multimeasure rest durations must be assignable.'
raise AssignabilityError(message)
multimeasure_rest = scoretools.MultimeasureRest(written_duration)
multimeasure_rests.append(multimeasure_rest)
result = selectiontools.Selection(multimeasure_rests)
return result