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()
417 class EventChord(NestedMusic):
418 def get_length (self):
420 for e in self.elements:
421 l = max(l, e.get_length())
424 def print_ly (self, printer):
425 note_events = [e for e in self.elements if
426 isinstance (e, NoteEvent)]
428 rest_events = [e for e in self.elements if
429 isinstance (e, RhythmicEvent)
430 and not isinstance (e, NoteEvent)]
432 other_events = [e for e in self.elements if
433 not isinstance (e, RhythmicEvent)]
436 rest_events[0].print_ly (printer)
437 elif len (note_events) == 1:
438 note_events[0].print_ly (printer)
440 pitches = [x.pitch.ly_expression () for x in note_events]
441 printer ('<%s>' % string.join (pitches))
442 note_events[0].duration.print_ly (printer)
446 for e in other_events:
449 self.print_comment (printer)
452 class BarCheck (Music):
454 Music.__init__ (self)
457 def print_ly (self, printer):
458 if self.bar_number > 0 and (self.bar_number % 10) == 0:
459 printer.dump ("| \\barNumberCheck #%d " % self.bar_number)
463 printer.print_verbatim (' %% %d' % self.bar_number)
467 def ly_expression (self):
473 class SpanEvent (Event):
475 Event.__init__ (self)
476 self.span_direction = 0
477 def get_properties(self):
478 return "'span-direction %d" % self.span_direction
480 class SlurEvent (SpanEvent):
481 def ly_expression (self):
484 1:')'}[self.span_direction]
486 class BeamEvent (SpanEvent):
487 def ly_expression (self):
490 1:']'}[self.span_direction]
492 class ArpeggioEvent(Event):
493 def ly_expression (self):
494 return ('\\arpeggio')
497 class TieEvent(Event):
498 def ly_expression (self):
502 class HairpinEvent (Event):
503 def __init__ (self, type):
505 def hairpin_to_ly (self):
507 tp = { 0: '\!', 1: '\<', -1: '\>' }.get (self.type)
512 def ly_expression (self):
513 return self.hairpin_to_ly ()
515 def print_ly (self, printer):
516 val = self.hairpin_to_ly ()
522 class DynamicsEvent (Event):
525 self.available_commands = [ "ppppp", "pppp", "ppp", "pp", "p",
527 "f", "ff", "fff", "ffff",
528 "fp", "sf", "sff", "sp", "spp", "sfz", "rfz" ];
529 def ly_expression (self):
530 if self.type == None:
532 elif self.type in self.available_commands:
533 return '\%s' % self.type
535 return '\markup{ \dynamic %s }' % self.type
537 def print_ly (self, printer):
538 if self.type == None:
540 elif self.type in self.available_commands:
541 printer.dump ("\\%s" % self.type)
543 printer.dump ("\\markup{ \\dynamic %s }" % self.type)
546 class ArticulationEvent (Event):
549 self.force_direction = None
551 def direction_mod (self):
552 dirstr = { 1: '^', -1: '_', 0: '-' }.get (self.force_direction)
558 def ly_expression (self):
559 return '%s\\%s' % (self.direction_mod (), self.type)
562 class TremoloEvent (Event):
566 def ly_expression (self):
569 str += ':%s' % (2 ** (2 + string.atoi (self.bars)))
573 class RhythmicEvent(Event):
575 Event.__init__ (self)
576 self.duration = Duration()
578 def get_length (self):
579 return self.duration.get_length()
581 def get_properties (self):
582 return ("'duration %s"
583 % self.duration.lisp_expression ())
585 class RestEvent (RhythmicEvent):
586 def ly_expression (self):
587 return 'r%s' % self.duration.ly_expression ()
589 def print_ly (self, printer):
591 self.duration.print_ly (printer)
593 class SkipEvent (RhythmicEvent):
594 def ly_expression (self):
595 return 's%s' % self.duration.ly_expression ()
597 class NoteEvent(RhythmicEvent):
599 RhythmicEvent.__init__ (self)
601 self.drum_type = None
602 self.cautionary = False
603 self.forced_accidental = False
605 def get_properties (self):
606 str = RhythmicEvent.get_properties ()
609 str += self.pitch.lisp_expression ()
611 str += "'drum-type '%s" % self.drum_type
615 def pitch_mods (self):
619 if self.forced_accidental:
624 def ly_expression (self):
626 return '%s%s%s' % (self.pitch.ly_expression (),
628 self.duration.ly_expression ())
630 return '%s%s' (self.drum_type,
631 self.duration.ly_expression ())
633 def print_ly (self, printer):
635 self.pitch.print_ly (printer)
636 printer (self.pitch_mods ())
638 printer (self.drum_type)
640 self.duration.print_ly (printer)
642 class KeySignatureChange (Music):
644 Music.__init__ (self)
649 def ly_expression (self):
650 return '\\key %s \\%s' % (self.tonic.ly_step_expression (),
653 def lisp_expression (self):
654 pairs = ['(%d . %d)' % (i , self.scale[i]) for i in range (0,7)]
655 scale_str = ("'(%s)" % string.join (pairs))
657 return """ (make-music 'KeyChangeEvent
658 'pitch-alist %s) """ % scale_str
660 class TimeSignatureChange (Music):
662 Music.__init__ (self)
663 self.fraction = (4,4)
664 def ly_expression (self):
665 return '\\time %d/%d ' % self.fraction
667 class ClefChange (Music):
669 Music.__init__ (self)
673 def ly_expression (self):
674 return '\\clef "%s"' % self.type
676 "G": ("clefs.G", -2, -6),
677 "C": ("clefs.C", 0, 0),
678 "F": ("clefs.F", 2, 6),
681 def lisp_expression (self):
682 (glyph, pos, c0) = self.clef_dict [self.type]
684 (make-music 'SequentialMusic
687 (make-property-set 'clefGlyph "%s") 'Staff)
689 (make-property-set 'clefPosition %d) 'Staff)
691 (make-property-set 'middleCPosition %d) 'Staff)))
692 """ % (glyph, pos, c0)
696 class MultiMeasureRest(Music):
698 def lisp_expression (self):
701 'MultiMeasureRestMusicGroup
703 (list (make-music (quote BarCheck))
708 'MultiMeasureRestEvent
711 (make-music (quote BarCheck))))
712 """ % self.duration.lisp_expression ()
714 def ly_expression (self):
715 return 'R%s' % self.duration.ly_expression ()
720 bflat.alteration = -1
730 print bflat.semitones()
731 print bflat.transposed (fifth), bflat.transposed (fifth).transposed (fifth)
732 print bflat.transposed (fifth).transposed (fifth).transposed (fifth)
734 print bflat.semitones(), 'down'
735 print bflat.transposed (down)
736 print bflat.transposed (down).transposed (down)
737 print bflat.transposed (down).transposed (down).transposed (down)
749 m = SequentialMusic()
750 m.append (make_note ())
751 m.append (make_note ())
752 m.append (make_note ())
755 t = TimeScaledMusic ()
761 m = SequentialMusic ()
762 m.append (make_tup ())
763 m.append (make_tup ())
764 m.append (make_tup ())
766 printer = Output_printer()
771 m = SequentialMusic()
775 n.duration.duration_log = l
777 evc.insert_around (None, n, 0)
778 m.insert_around (None, evc, 0)
782 n.duration.duration_log = l
784 evc.insert_around (None, n, 0)
785 m.insert_around (None, evc, 0)
789 n.duration.duration_log = l
791 evc.insert_around (None, n, 0)
792 m.insert_around (None, evc, 0)
796 m.insert_around (None, evc, 0)
801 tonic.alteration = -2
802 n = KeySignatureChange()
804 n.scale = [0, 0, -2, 0, 0,-2,-2]
806 evc.insert_around (None, n, 0)
807 m.insert_around (None, evc, 0)
812 if __name__ == '__main__':
818 expr.set_start (Rational (0))
819 print expr.ly_expression()
820 start = Rational (0,4)
821 stop = Rational (4,2)
822 def sub(x, start=start, stop=stop):
823 ok = x.start >= start and x.start +x.get_length() <= stop
826 print expr.lisp_sub_expression(sub)