6 from rational import Rational
8 class Output_stack_element:
10 self.factor = Rational (1)
12 o = Output_stack_element()
13 o.factor = self.factor
18 """A class that takes care of formatting (eg.: indenting) a
19 Music expression as a .ly file.
22 ## TODO: support for \relative.
28 self._file = sys.stdout
30 self._output_state_stack = [Output_stack_element()]
31 self._skipspace = False
32 self._last_duration = None
34 def set_file (self, file):
37 def dump_version (self):
39 self.print_verbatim ('\\version "@TOPLEVEL_VERSION@"')
42 def get_indent (self):
43 return self._nesting * self._indent
46 last = self._output_state_stack[-1]
47 self._output_state_stack.append (last.copy())
49 def add_factor (self, factor):
51 self._output_state_stack[-1].factor *= factor
54 del self._output_state_stack[-1]
55 if not self._output_state_stack:
58 def duration_factor (self):
59 return self._output_state_stack[-1].factor
61 def print_verbatim (self, str):
64 def unformatted_output (self, str):
65 self._nesting += str.count ('<') + str.count ('{')
66 self._nesting -= str.count ('>') + str.count ('}')
67 self.print_verbatim (str)
69 def print_duration_string (self, str):
70 if self._last_duration == str:
73 self.unformatted_output (str)
75 def add_word (self, str):
76 if (len (str) + 1 + len (self._line) > self._line_len):
78 self._skipspace = True
80 if not self._skipspace:
82 self.unformatted_output (str)
83 self._skipspace = False
86 self._file.write (self._line + '\n')
87 self._line = ' ' * self._indent * self._nesting
88 self._skipspace = True
91 self._skipspace = True
93 def __call__(self, arg):
98 self._skipspace = False
99 self.unformatted_output (str)
101 words = string.split (str)
114 self.duration_log = 0
116 self.factor = Rational (1)
118 def lisp_expression (self):
119 return '(ly:make-duration %d %d %d %d)' % (self.duration_log,
121 self.factor.numerator (),
122 self.factor.denominator ())
125 def ly_expression (self, factor = None):
129 str = '%d%s' % (1 << self.duration_log, '.'*self.dots)
131 if factor <> Rational (1,1):
132 str += '*%d/%d' % (factor.numerator (), factor.denominator ())
136 def print_ly (self, outputter):
137 str = self.ly_expression (self.factor / outputter.duration_factor ())
138 outputter.print_duration_string (str)
141 return self.ly_expression()
146 d.duration_log = self.duration_log
147 d.factor = self.factor
150 def get_length (self):
151 dot_fact = Rational( (1 << (1 + self.dots))-1,
154 log = abs (self.duration_log)
156 if self.duration_log < 0:
157 base = Rational (dur)
159 base = Rational (1, dur)
161 return base * dot_fact * self.factor
171 return self.ly_expression()
173 def transposed (self, interval):
175 c.alteration += interval.alteration
176 c.step += interval.step
177 c.octave += interval.octave
180 target_st = self.semitones() + interval.semitones()
181 c.alteration += target_st - c.semitones()
188 c.octave += c.step / 7
191 def lisp_expression (self):
192 return '(ly:make-pitch %d %d %d)' % (self.octave,
198 p.alteration = self.alteration
200 p.octave = self.octave
204 return self.step + self.octave *7
206 def semitones (self):
207 return self.octave * 12 + [0,2,4,5,7,9,11][self.step] + self.alteration
209 def ly_step_expression (self):
210 str = 'cdefgab'[self.step]
211 if self.alteration > 0:
212 str += 'is'* (self.alteration)
213 elif self.alteration < 0:
214 str += 'es'* (-self.alteration)
216 return str.replace ('aes', 'as').replace ('ees', 'es')
218 def ly_expression (self):
219 str = self.ly_step_expression ()
221 str += "'" * (self.octave + 1)
222 elif self.octave < -1:
223 str += "," * (-self.octave - 1)
227 def print_ly (self, outputter):
228 outputter (self.ly_expression())
233 self.start = Rational (0)
235 self.identifier = None
237 def get_length(self):
240 def get_properties (self):
243 def has_children (self):
246 def get_index (self):
248 return self.parent.elements.index (self)
252 return self.__class__.__name__
254 def lisp_expression (self):
257 props = self.get_properties ()
259 return "(make-music '%s %s)" % (name, props)
261 def set_start (self, start):
264 def find_first (self, predicate):
269 def print_comment (self, printer, text = None):
280 lines = string.split (text, '\n')
283 printer.unformatted_output ('% ' + l)
287 def print_with_identifier (self, printer):
289 printer ("\\%s" % self.identifier)
291 self.print_ly (printer)
293 def print_ly (self, printer):
294 printer (self.ly_expression ())
296 class MusicWrapper (Music):
300 def print_ly (self, func):
301 self.element.print_ly (func)
303 class ModeChangingMusicWrapper (MusicWrapper):
305 MusicWrapper.__init__ (self)
306 self.mode = 'notemode'
308 def print_ly (self, func):
309 func ('\\%s' % self.mode)
310 MusicWrapper.print_ly (self, func)
312 class TimeScaledMusic (MusicWrapper):
313 def print_ly (self, func):
314 func ('\\times %d/%d ' %
315 (self.numerator, self.denominator))
316 func.add_factor (Rational (self.numerator, self.denominator))
317 MusicWrapper.print_ly (self, func)
320 class NestedMusic(Music):
322 Music.__init__ (self)
325 def append (self, what):
327 self.elements.append (what)
329 def has_children (self):
332 def insert_around (self, succ, elt, dir):
333 assert elt.parent == None
334 assert succ == None or succ in self.elements
339 idx = self.elements.index (succ)
346 idx = len (self.elements)
348 self.elements.insert (idx, elt)
351 def get_properties (self):
352 return ("'elements (list %s)"
353 % string.join (map (lambda x: x.lisp_expression(),
356 def get_subset_properties (self, predicate):
357 return ("'elements (list %s)"
358 % string.join (map (lambda x: x.lisp_expression(),
359 filter ( predicate, self.elements))))
360 def get_neighbor (self, music, dir):
361 assert music.parent == self
362 idx = self.elements.index (music)
364 idx = min (idx, len (self.elements) -1)
367 return self.elements[idx]
369 def delete_element (self, element):
370 assert element in self.elements
372 self.elements.remove (element)
373 element.parent = None
375 def set_start (self, start):
377 for e in self.elements:
380 def find_first (self, predicate):
381 r = Music.find_first (self, predicate)
385 for e in self.elements:
386 r = e.find_first (predicate)
391 class SequentialMusic (NestedMusic):
392 def print_ly (self, printer):
395 self.print_comment (printer)
398 for e in self.elements:
404 def lisp_sub_expression (self, pred):
408 props = self.get_subset_properties (pred)
410 return "(make-music '%s %s)" % (name, props)
412 def set_start (self, start):
413 for e in self.elements:
415 start += e.get_length()
419 self.lyrics_syllables = []
421 def print_ly (self, printer):
422 printer.dump ("\lyricmode {")
423 for l in self.lyrics_syllables:
424 printer.dump ( "%s " % l )
427 def ly_expression (self):
428 lstr = "\lyricmode {\n "
429 for l in self.lyrics_syllables:
435 class EventChord(NestedMusic):
436 def get_length (self):
438 for e in self.elements:
439 l = max(l, e.get_length())
442 def print_ly (self, printer):
443 note_events = [e for e in self.elements if
444 isinstance (e, NoteEvent)]
446 rest_events = [e for e in self.elements if
447 isinstance (e, RhythmicEvent)
448 and not isinstance (e, NoteEvent)]
450 other_events = [e for e in self.elements if
451 not isinstance (e, RhythmicEvent)]
454 rest_events[0].print_ly (printer)
455 elif len (note_events) == 1:
456 note_events[0].print_ly (printer)
458 pitches = [x.pitch.ly_expression () for x in note_events]
459 printer ('<%s>' % string.join (pitches))
460 note_events[0].duration.print_ly (printer)
464 for e in other_events:
467 self.print_comment (printer)
470 class BarCheck (Music):
472 Music.__init__ (self)
475 def print_ly (self, printer):
476 if self.bar_number > 0 and (self.bar_number % 10) == 0:
477 printer.dump ("| \\barNumberCheck #%d " % self.bar_number)
481 printer.print_verbatim (' %% %d' % self.bar_number)
485 def ly_expression (self):
491 class SpanEvent (Event):
493 Event.__init__ (self)
494 self.span_direction = 0
495 def get_properties(self):
496 return "'span-direction %d" % self.span_direction
498 class SlurEvent (SpanEvent):
499 def ly_expression (self):
502 1:')'}.get (self.span_direction, '')
504 class BeamEvent (SpanEvent):
505 def ly_expression (self):
508 1:']'}.get (self.span_direction, '')
510 class ArpeggioEvent(Event):
511 def ly_expression (self):
512 return ('\\arpeggio')
515 class TieEvent(Event):
516 def ly_expression (self):
520 class HairpinEvent (Event):
521 def __init__ (self, type):
523 def hairpin_to_ly (self):
524 return { 0: '\!', 1: '\<', -1: '\>' }.get (self.type, '')
526 def ly_expression (self):
527 return self.hairpin_to_ly ()
529 def print_ly (self, printer):
530 val = self.hairpin_to_ly ()
536 class DynamicsEvent (Event):
539 self.available_commands = [ "ppppp", "pppp", "ppp", "pp", "p",
541 "f", "ff", "fff", "ffff",
542 "fp", "sf", "sff", "sp", "spp", "sfz", "rfz" ];
543 def ly_expression (self):
544 if self.type == None:
546 elif self.type in self.available_commands:
547 return '\%s' % self.type
549 return '\markup{ \dynamic %s }' % self.type
551 def print_ly (self, printer):
552 if self.type == None:
554 elif self.type in self.available_commands:
555 printer.dump ("\\%s" % self.type)
557 printer.dump ("\\markup{ \\dynamic %s }" % self.type)
560 class ArticulationEvent (Event):
563 self.force_direction = None
565 def direction_mod (self):
566 return { 1: '^', -1: '_', 0: '-' }.get (self.force_direction, '')
568 def ly_expression (self):
569 return '%s\\%s' % (self.direction_mod (), self.type)
572 class TremoloEvent (Event):
576 def ly_expression (self):
579 str += ':%s' % (2 ** (2 + string.atoi (self.bars)))
583 class RhythmicEvent(Event):
585 Event.__init__ (self)
586 self.duration = Duration()
588 def get_length (self):
589 return self.duration.get_length()
591 def get_properties (self):
592 return ("'duration %s"
593 % self.duration.lisp_expression ())
595 class RestEvent (RhythmicEvent):
596 def ly_expression (self):
597 return 'r%s' % self.duration.ly_expression ()
599 def print_ly (self, printer):
601 self.duration.print_ly (printer)
603 class SkipEvent (RhythmicEvent):
604 def ly_expression (self):
605 return 's%s' % self.duration.ly_expression ()
607 class NoteEvent(RhythmicEvent):
609 RhythmicEvent.__init__ (self)
611 self.drum_type = None
612 self.cautionary = False
613 self.forced_accidental = False
615 def get_properties (self):
616 str = RhythmicEvent.get_properties ()
619 str += self.pitch.lisp_expression ()
621 str += "'drum-type '%s" % self.drum_type
625 def pitch_mods (self):
629 if self.forced_accidental:
634 def ly_expression (self):
636 return '%s%s%s' % (self.pitch.ly_expression (),
638 self.duration.ly_expression ())
640 return '%s%s' (self.drum_type,
641 self.duration.ly_expression ())
643 def print_ly (self, printer):
645 self.pitch.print_ly (printer)
646 printer (self.pitch_mods ())
648 printer (self.drum_type)
650 self.duration.print_ly (printer)
652 class KeySignatureChange (Music):
654 Music.__init__ (self)
659 def ly_expression (self):
660 return '\\key %s \\%s' % (self.tonic.ly_step_expression (),
663 def lisp_expression (self):
664 pairs = ['(%d . %d)' % (i , self.scale[i]) for i in range (0,7)]
665 scale_str = ("'(%s)" % string.join (pairs))
667 return """ (make-music 'KeyChangeEvent
668 'pitch-alist %s) """ % scale_str
670 class TimeSignatureChange (Music):
672 Music.__init__ (self)
673 self.fraction = (4,4)
674 def ly_expression (self):
675 return '\\time %d/%d ' % self.fraction
677 class ClefChange (Music):
679 Music.__init__ (self)
683 def ly_expression (self):
684 return '\\clef "%s"' % self.type
686 "G": ("clefs.G", -2, -6),
687 "C": ("clefs.C", 0, 0),
688 "F": ("clefs.F", 2, 6),
691 def lisp_expression (self):
692 (glyph, pos, c0) = self.clef_dict.get (self.type)
694 (make-music 'SequentialMusic
697 (make-property-set 'clefGlyph "%s") 'Staff)
699 (make-property-set 'clefPosition %d) 'Staff)
701 (make-property-set 'middleCPosition %d) 'Staff)))
702 """ % (glyph, pos, c0)
706 class MultiMeasureRest(Music):
708 def lisp_expression (self):
711 'MultiMeasureRestMusicGroup
713 (list (make-music (quote BarCheck))
718 'MultiMeasureRestEvent
721 (make-music (quote BarCheck))))
722 """ % self.duration.lisp_expression ()
724 def ly_expression (self):
725 return 'R%s' % self.duration.ly_expression ()
730 bflat.alteration = -1
740 print bflat.semitones()
741 print bflat.transposed (fifth), bflat.transposed (fifth).transposed (fifth)
742 print bflat.transposed (fifth).transposed (fifth).transposed (fifth)
744 print bflat.semitones(), 'down'
745 print bflat.transposed (down)
746 print bflat.transposed (down).transposed (down)
747 print bflat.transposed (down).transposed (down).transposed (down)
759 m = SequentialMusic()
760 m.append (make_note ())
761 m.append (make_note ())
762 m.append (make_note ())
765 t = TimeScaledMusic ()
771 m = SequentialMusic ()
772 m.append (make_tup ())
773 m.append (make_tup ())
774 m.append (make_tup ())
776 printer = Output_printer()
781 m = SequentialMusic()
785 n.duration.duration_log = l
787 evc.insert_around (None, n, 0)
788 m.insert_around (None, evc, 0)
792 n.duration.duration_log = l
794 evc.insert_around (None, n, 0)
795 m.insert_around (None, evc, 0)
799 n.duration.duration_log = l
801 evc.insert_around (None, n, 0)
802 m.insert_around (None, evc, 0)
806 m.insert_around (None, evc, 0)
811 tonic.alteration = -2
812 n = KeySignatureChange()
814 n.scale = [0, 0, -2, 0, 0,-2,-2]
816 evc.insert_around (None, n, 0)
817 m.insert_around (None, evc, 0)
822 if __name__ == '__main__':
828 expr.set_start (Rational (0))
829 print expr.ly_expression()
830 start = Rational (0,4)
831 stop = Rational (4,2)
832 def sub(x, start=start, stop=stop):
833 ok = x.start >= start and x.start +x.get_length() <= stop
836 print expr.lisp_sub_expression(sub)