python/musicexp.py

   1 import inspect
   2 import sys
   3 import string
   4 import re
   5 import lilylib as ly
   6
   7 _ = ly._
   8
   9 from rational import Rational
  10
  11 # Store previously converted pitch for \relative conversion as a global state variable
  12 previous_pitch = None
  13 relative_pitches = False
  14
  15 def warning (str):
  16     ly.stderr_write ((_ ("warning: %s") % str) + "\n")
  17
  18
  19 def escape_instrument_string (input_string):
  20     retstring = string.replace (input_string, "\"", "\\\"")
  21     if re.match ('.*[\r\n]+.*', retstring):
  22         rx = re.compile (r'[\n\r]+')
  23         strings = rx.split (retstring)
  24         retstring = "\\markup { \\column { "
  25         for s in strings:
  26             retstring += "\\line {\"" + s + "\"} "
  27         retstring += "} }"
  28     else:
  29         retstring = "\"" + retstring + "\""
  30     return retstring
  31
  32 class Output_stack_element:
  33     def __init__ (self):
  34         self.factor = Rational (1)
  35     def copy (self):
  36         o = Output_stack_element()
  37         o.factor = self.factor
  38         return o
  39
  40 class Output_printer:
  41
  42     """A class that takes care of formatting (eg.: indenting) a
  43     Music expression as a .ly file.
  44
  45     """
  46
  47     def __init__ (self):
  48         self._line = ''
  49         self._indent = 4
  50         self._nesting = 0
  51         self._file = sys.stdout
  52         self._line_len = 72
  53         self._output_state_stack = [Output_stack_element()]
  54         self._skipspace = False
  55         self._last_duration = None
  56
  57     def set_file (self, file):
  58         self._file = file
  59
  60     def dump_version (self):
  61         self.newline ()
  62         self.print_verbatim ('\\version "@TOPLEVEL_VERSION@"')
  63         self.newline ()
  64
  65     def get_indent (self):
  66         return self._nesting * self._indent
  67
  68     def override (self):
  69         last = self._output_state_stack[-1]
  70         self._output_state_stack.append (last.copy())
  71
  72     def add_factor (self, factor):
  73         self.override()
  74         self._output_state_stack[-1].factor *=  factor
  75
  76     def revert (self):
  77         del self._output_state_stack[-1]
  78         if not self._output_state_stack:
  79             raise 'empty'
  80
  81     def duration_factor (self):
  82         return self._output_state_stack[-1].factor
  83
  84     def print_verbatim (self, str):
  85         self._line += str
  86
  87     def unformatted_output (self, str):
  88         # don't indent on \< and indent only once on <<
  89         self._nesting += ( str.count ('<')
  90                          - str.count ('\<') - str.count ('<<')
  91                          + str.count ('{') )
  92         self._nesting -= ( str.count ('>') - str.count ('\>') - str.count ('>>')
  93                                            - str.count ('->') - str.count ('_>')
  94                                            - str.count ('^>')
  95                          + str.count ('}') )
  96         self.print_verbatim (str)
  97
  98     def print_duration_string (self, str):
  99         if self._last_duration == str:
 100             return
 101
 102         self.unformatted_output (str)
 103
 104     def add_word (self, str):
 105         if (len (str) + 1 + len (self._line) > self._line_len):
 106             self.newline()
 107             self._skipspace = True
 108
 109         if not self._skipspace:
 110             self._line += ' '
 111         self.unformatted_output (str)
 112         self._skipspace = False
 113
 114     def newline (self):
 115         self._file.write (self._line + '\n')
 116         self._line = ' ' * self._indent * self._nesting
 117         self._skipspace = True
 118
 119     def skipspace (self):
 120         self._skipspace = True
 121
 122     def __call__(self, arg):
 123         self.dump (arg)
 124
 125     def dump (self, str):
 126         if self._skipspace:
 127             self._skipspace = False
 128             self.unformatted_output (str)
 129         else:
 130             words = string.split (str)
 131             for w in words:
 132                 self.add_word (w)
 133
 134
 135     def close (self):
 136         self.newline ()
 137         self._file.close ()
 138         self._file = None
 139
 140
 141 class Duration:
 142     def __init__ (self):
 143         self.duration_log = 0
 144         self.dots = 0
 145         self.factor = Rational (1)
 146
 147     def lisp_expression (self):
 148         return '(ly:make-duration %d %d %d %d)' % (self.duration_log,
 149                              self.dots,
 150                              self.factor.numerator (),
 151                              self.factor.denominator ())
 152
 153
 154     def ly_expression (self, factor = None, scheme_mode = False):
 155         if not factor:
 156             factor = self.factor
 157
 158         if self.duration_log < 0:
 159             if scheme_mode:
 160                 longer_dict = {-1: "breve", -2: "longa"}
 161             else:
 162                 longer_dict = {-1: "\\breve", -2: "\\longa"}
 163             str = longer_dict.get (self.duration_log, "1")
 164         else:
 165             str = '%d' % (1 << self.duration_log)
 166         str += '.'*self.dots
 167
 168         if factor <> Rational (1,1):
 169             if factor.denominator () <> 1:
 170                 str += '*%d/%d' % (factor.numerator (), factor.denominator ())
 171             else:
 172                 str += '*%d' % factor.numerator ()
 173
 174         return str
 175
 176     def print_ly (self, outputter):
 177         str = self.ly_expression (self.factor / outputter.duration_factor ())
 178         outputter.print_duration_string (str)
 179
 180     def __repr__(self):
 181         return self.ly_expression()
 182
 183     def copy (self):
 184         d = Duration ()
 185         d.dots = self.dots
 186         d.duration_log = self.duration_log
 187         d.factor = self.factor
 188         return d
 189
 190     def get_length (self):
 191         dot_fact = Rational( (1 << (1 + self.dots))-1,
 192                              1 << self.dots)
 193
 194         log = abs (self.duration_log)
 195         dur = 1 << log
 196         if self.duration_log < 0:
 197             base = Rational (dur)
 198         else:
 199             base = Rational (1, dur)
 200
 201         return base * dot_fact * self.factor
 202
 203
 204 # Implement the different note names for the various languages
 205 def pitch_generic (pitch, notenames, accidentals):
 206     str = notenames[pitch.step]
 207     halftones = int (pitch.alteration)
 208     if halftones < 0:
 209         str += accidentals[0] * (-halftones)
 210     elif pitch.alteration > 0:
 211         str += accidentals[3] * (halftones)
 212     # Handle remaining fraction to pitch.alteration (for microtones)
 213     if (halftones != pitch.alteration):
 214         if None in accidentals[1:3]:
 215             warning (_ ("Language does not support microtones contained in the piece"))
 216         else:
 217             try:
 218                 str += {-0.5: accidentals[1], 0.5: accidentals[2]}[pitch.alteration-halftones]
 219             except KeyError:
 220                 warning (_ ("Language does not support microtones contained in the piece"))
 221     return str
 222
 223 def pitch_general (pitch):
 224     str = pitch_generic (pitch, ['c', 'd', 'e', 'f', 'g', 'a', 'b'], ['es', 'eh', 'ih', 'is'])
 225     return str.replace ('aes', 'as').replace ('ees', 'es')
 226
 227 def pitch_nederlands (pitch):
 228     return pitch_general (pitch)
 229
 230 def pitch_english (pitch):
 231     str = pitch_generic (pitch, ['c', 'd', 'e', 'f', 'g', 'a', 'b'], ['f', 'qf', 'qs', 's'])
 232     return str.replace ('aes', 'as').replace ('ees', 'es')
 233
 234 def pitch_deutsch (pitch):
 235     str = pitch_generic (pitch, ['c', 'd', 'e', 'f', 'g', 'a', 'h'], ['es', 'eh', 'ih', 'is'])
 236     return str.replace ('hes', 'b').replace ('aes', 'as').replace ('ees', 'es')
 237
 238 def pitch_norsk (pitch):
 239     return pitch_deutsch (pitch)
 240
 241 def pitch_svenska (pitch):
 242     str = pitch_generic (pitch, ['c', 'd', 'e', 'f', 'g', 'a', 'h'], ['ess', None, None, 'iss'])
 243     return str.replace ('hess', 'b').replace ('aes', 'as').replace ('ees', 'es')
 244
 245 def pitch_italiano (pitch):
 246     str = pitch_generic (pitch, ['do', 're', 'mi', 'fa', 'sol', 'la', 'si'], ['b', 'sb', 'sd', 'd'])
 247     return str
 248
 249 def pitch_catalan (pitch):
 250     return pitch_italiano (pitch)
 251
 252 def pitch_espanol (pitch):
 253     str = pitch_generic (pitch, ['do', 're', 'mi', 'fa', 'sol', 'la', 'si'], ['b', None, None, 's'])
 254     return str
 255
 256 def pitch_vlaams (pitch):
 257     str = pitch_generic (pitch, ['do', 're', 'mi', 'fa', 'sol', 'la', 'si'], ['b', None, None, 'k'])
 258     return str
 259
 260 def set_pitch_language (language):
 261     global pitch_generating_function
 262     function_dict = {
 263         "nederlands": pitch_nederlands,
 264         "english": pitch_english,
 265         "deutsch": pitch_deutsch,
 266         "norsk": pitch_norsk,
 267         "svenska": pitch_svenska,
 268         "italiano": pitch_italiano,
 269         "catalan": pitch_catalan,
 270         "espanol": pitch_espanol,
 271         "vlaams": pitch_vlaams}
 272     pitch_generating_function = function_dict.get (language, pitch_general)
 273
 274 # global variable to hold the formatting function.
 275 pitch_generating_function = pitch_general
 276
 277
 278 class Pitch:
 279     def __init__ (self):
 280         self.alteration = 0
 281         self.step = 0
 282         self.octave = 0
 283         self._force_absolute_pitch = False
 284
 285     def __repr__(self):
 286         return self.ly_expression()
 287
 288     def transposed (self, interval):
 289         c = self.copy ()
 290         c.alteration  += interval.alteration
 291         c.step += interval.step
 292         c.octave += interval.octave
 293         c.normalize ()
 294
 295         target_st = self.semitones()  + interval.semitones()
 296         c.alteration += target_st - c.semitones()
 297         return c
 298
 299     def normalize (c):
 300         while c.step < 0:
 301             c.step += 7
 302             c.octave -= 1
 303         c.octave += c.step / 7
 304         c.step = c.step  % 7
 305
 306     def lisp_expression (self):
 307         return '(ly:make-pitch %d %d %d)' % (self.octave,
 308                                              self.step,
 309                                              self.alteration)
 310
 311     def copy (self):
 312         p = Pitch ()
 313         p.alteration = self.alteration
 314         p.step = self.step
 315         p.octave = self.octave
 316         return p
 317
 318     def steps (self):
 319         return self.step + self.octave *7
 320
 321     def semitones (self):
 322         return self.octave * 12 + [0,2,4,5,7,9,11][self.step] + self.alteration
 323
 324     def ly_step_expression (self):
 325         return pitch_generating_function (self)
 326
 327     def absolute_pitch (self):
 328         if self.octave >= 0:
 329             return "'" * (self.octave + 1)
 330         elif self.octave < -1:
 331             return "," * (-self.octave - 1)
 332         else:
 333             return ''
 334
 335     def relative_pitch (self):
 336         global previous_pitch
 337         if not previous_pitch:
 338             previous_pitch = self
 339             return self.absolute_pitch ()
 340         previous_pitch_steps = previous_pitch.octave * 7 + previous_pitch.step
 341         this_pitch_steps = self.octave * 7 + self.step
 342         pitch_diff = (this_pitch_steps - previous_pitch_steps)
 343         previous_pitch = self
 344         if pitch_diff > 3:
 345             return "'" * ((pitch_diff + 3) / 7)
 346         elif pitch_diff < -3:
 347             return "," * ((-pitch_diff + 3) / 7)
 348         else:
 349             return ""
 350
 351     def ly_expression (self):
 352         str = self.ly_step_expression ()
 353         if relative_pitches and not self._force_absolute_pitch:
 354             str += self.relative_pitch ()
 355         else:
 356             str += self.absolute_pitch ()
 357
 358         return str
 359
 360     def print_ly (self, outputter):
 361         outputter (self.ly_expression())
 362
 363 class Music:
 364     def __init__ (self):
 365         self.parent = None
 366         self.start = Rational (0)
 367         self.comment = ''
 368         self.identifier = None
 369
 370     def get_length(self):
 371         return Rational (0)
 372
 373     def get_properties (self):
 374         return ''
 375
 376     def has_children (self):
 377         return False
 378
 379     def get_index (self):
 380         if self.parent:
 381             return self.parent.elements.index (self)
 382         else:
 383             return None
 384     def name (self):
 385         return self.__class__.__name__
 386
 387     def lisp_expression (self):
 388         name = self.name()
 389
 390         props = self.get_properties ()
 391
 392         return "(make-music '%s %s)" % (name,  props)
 393
 394     def set_start (self, start):
 395         self.start = start
 396
 397     def find_first (self, predicate):
 398         if predicate (self):
 399             return self
 400         return None
 401
 402     def print_comment (self, printer, text = None):
 403         if not text:
 404             text = self.comment
 405
 406         if not text:
 407             return
 408
 409         if text == '\n':
 410             printer.newline ()
 411             return
 412
 413         lines = string.split (text, '\n')
 414         for l in lines:
 415             if l:
 416                 printer.unformatted_output ('% ' + l)
 417             printer.newline ()
 418
 419
 420     def print_with_identifier (self, printer):
 421         if self.identifier:
 422             printer ("\\%s" % self.identifier)
 423         else:
 424             self.print_ly (printer)
 425
 426     def print_ly (self, printer):
 427         printer (self.ly_expression ())
 428
 429 class MusicWrapper (Music):
 430     def __init__ (self):
 431         Music.__init__(self)
 432         self.element = None
 433     def print_ly (self, func):
 434         self.element.print_ly (func)
 435
 436 class ModeChangingMusicWrapper (MusicWrapper):
 437     def __init__ (self):
 438         MusicWrapper.__init__ (self)
 439         self.mode = 'notemode'
 440
 441     def print_ly (self, func):
 442         func ('\\%s' % self.mode)
 443         MusicWrapper.print_ly (self, func)
 444
 445 class RelativeMusic (MusicWrapper):
 446     def __init__ (self):
 447         MusicWrapper.__init__ (self)
 448         self.basepitch = None
 449
 450     def print_ly (self, func):
 451         global previous_pitch
 452         global relative_pitches
 453         prev_relative_pitches = relative_pitches
 454         relative_pitches = True
 455         previous_pitch = self.basepitch
 456         if not previous_pitch:
 457             previous_pitch = Pitch ()
 458         func ('\\relative %s%s' % (pitch_generating_function (previous_pitch),
 459                                    previous_pitch.absolute_pitch ()))
 460         MusicWrapper.print_ly (self, func)
 461         relative_pitches = prev_relative_pitches
 462
 463 class TimeScaledMusic (MusicWrapper):
 464     def __init__ (self):
 465         MusicWrapper.__init__ (self)
 466         self.numerator = 1
 467         self.denominator = 1
 468         self.display_number = "actual" # valid values "actual" | "both" | None
 469         # Display the basic note length for the tuplet:
 470         self.display_type = None       # value values "actual" | "both" | None
 471         self.display_bracket = "bracket" # valid values "bracket" | "curved" | None
 472         self.actual_type = None   # The actually played unit of the scaling
 473         self.normal_type = None   # The basic unit of the scaling
 474         self.display_numerator = None
 475         self.display_denominator = None
 476
 477     def print_ly (self, func):
 478         if self.display_bracket == None:
 479             func ("\\once \\override TupletBracket #'stencil = ##f")
 480             func.newline ()
 481         elif self.display_bracket == "curved":
 482             warning (_ ("Tuplet brackets of curved shape are not correctly implemented"))
 483             func ("\\once \\override TupletBracket #'stencil = #ly:slur::print")
 484             func.newline ()
 485
 486         base_number_function = {None: "#f",
 487              "actual": "tuplet-number::calc-denominator-text",
 488              "both": "tuplet-number::calc-fraction-text"}.get (self.display_number, None)
 489         # If we have non-standard numerator/denominator, use our custom function
 490         if self.display_number == "actual" and self.display_denominator:
 491             base_number_function = "(tuplet-number::non-default-tuplet-denominator-text %s)" % self.display_denominator
 492         elif self.display_number == "both" and (self.display_denominator or self.display_numerator):
 493             if self.display_numerator:
 494                 num = self.display_numerator
 495             else:
 496                 num = "#f"
 497             if self.display_denominator:
 498                 den = self.display_denominator
 499             else:
 500                 den = "#f"
 501             base_number_function = "(tuplet-number::non-default-tuplet-fraction-text %s %s)" % (den, num)
 502
 503
 504         if self.display_type == "actual" and self.normal_type:
 505             # Obtain the note duration in scheme-mode, i.e. \longa as \\longa
 506             base_duration = self.normal_type.ly_expression (None, True)
 507             func ("\\once \\override TupletNumber #'text = #(tuplet-number::append-note-wrapper %s \"%s\")" %
 508                 (base_number_function, base_duration))
 509             func.newline ()
 510         elif self.display_type == "both": # TODO: Implement this using actual_type and normal_type!
 511             warning (_ ("Tuplet brackets displaying both note durations are not implemented, using default"))
 512             if self.display_number == None:
 513                 func ("\\once \\override TupletNumber #'stencil = ##f")
 514                 func.newline ()
 515             elif self.display_number == "both":
 516                 func ("\\once \\override TupletNumber #'text = #%s" % base_number_function)
 517                 func.newline ()
 518         else:
 519             if self.display_number == None:
 520                 func ("\\once \\override TupletNumber #'stencil = ##f")
 521                 func.newline ()
 522             elif self.display_number == "both":
 523                 func ("\\once \\override TupletNumber #'text = #%s" % base_number_function)
 524                 func.newline ()
 525
 526         func ('\\times %d/%d ' %
 527            (self.numerator, self.denominator))
 528         func.add_factor (Rational (self.numerator, self.denominator))
 529         MusicWrapper.print_ly (self, func)
 530         func.revert ()
 531
 532 class NestedMusic(Music):
 533     def __init__ (self):
 534         Music.__init__ (self)
 535         self.elements = []
 536
 537     def append (self, what):
 538         if what:
 539             self.elements.append (what)
 540
 541     def has_children (self):
 542         return self.elements
 543
 544     def insert_around (self, succ, elt, dir):
 545         assert elt.parent == None
 546         assert succ == None or succ in self.elements
 547
 548
 549         idx = 0
 550         if succ:
 551             idx = self.elements.index (succ)
 552             if dir > 0:
 553                 idx += 1
 554         else:
 555             if dir < 0:
 556                 idx = 0
 557             elif dir > 0:
 558                 idx = len (self.elements)
 559
 560         self.elements.insert (idx, elt)
 561         elt.parent = self
 562
 563     def get_properties (self):
 564         return ("'elements (list %s)"
 565             % string.join (map (lambda x: x.lisp_expression(),
 566                       self.elements)))
 567
 568     def get_subset_properties (self, predicate):
 569         return ("'elements (list %s)"
 570             % string.join (map (lambda x: x.lisp_expression(),
 571                       filter ( predicate,  self.elements))))
 572     def get_neighbor (self, music, dir):
 573         assert music.parent == self
 574         idx = self.elements.index (music)
 575         idx += dir
 576         idx = min (idx, len (self.elements) -1)
 577         idx = max (idx, 0)
 578
 579         return self.elements[idx]
 580
 581     def delete_element (self, element):
 582         assert element in self.elements
 583
 584         self.elements.remove (element)
 585         element.parent = None
 586
 587     def set_start (self, start):
 588         self.start = start
 589         for e in self.elements:
 590             e.set_start (start)
 591
 592     def find_first (self, predicate):
 593         r = Music.find_first (self, predicate)
 594         if r:
 595             return r
 596
 597         for e in self.elements:
 598             r = e.find_first (predicate)
 599             if r:
 600                 return r
 601         return None
 602
 603 class SequentialMusic (NestedMusic):
 604     def get_last_event_chord (self):
 605         value = None
 606         at = len( self.elements ) - 1
 607         while (at >= 0 and
 608                not isinstance (self.elements[at], ChordEvent) and
 609                not isinstance (self.elements[at], BarLine)):
 610             at -= 1
 611
 612         if (at >= 0 and isinstance (self.elements[at], ChordEvent)):
 613             value = self.elements[at]
 614         return value
 615
 616     def print_ly (self, printer, newline = True):
 617         printer ('{')
 618         if self.comment:
 619             self.print_comment (printer)
 620
 621         if newline:
 622             printer.newline()
 623         for e in self.elements:
 624             e.print_ly (printer)
 625
 626         printer ('}')
 627         if newline:
 628             printer.newline()
 629
 630     def lisp_sub_expression (self, pred):
 631         name = self.name()
 632
 633
 634         props = self.get_subset_properties (pred)
 635
 636         return "(make-music '%s %s)" % (name,  props)
 637
 638     def set_start (self, start):
 639         for e in self.elements:
 640             e.set_start (start)
 641             start += e.get_length()
 642
 643 class RepeatedMusic:
 644     def __init__ (self):
 645         self.repeat_type = "volta"
 646         self.repeat_count = 2
 647         self.endings = []
 648         self.music = None
 649     def set_music (self, music):
 650         if isinstance (music, Music):
 651             self.music = music
 652         elif isinstance (music, list):
 653             self.music = SequentialMusic ()
 654             self.music.elements = music
 655         else:
 656             warning (_ ("unable to set the music %(music)s for the repeat %(repeat)s") % \
 657                             {'music':music, 'repeat':self})
 658     def add_ending (self, music):
 659         self.endings.append (music)
 660     def print_ly (self, printer):
 661         printer.dump ('\\repeat %s %s' % (self.repeat_type, self.repeat_count))
 662         if self.music:
 663             self.music.print_ly (printer)
 664         else:
 665             warning (_ ("encountered repeat without body"))
 666             printer.dump ('{}')
 667         if self.endings:
 668             printer.dump ('\\alternative {')
 669             for e in self.endings:
 670                 e.print_ly (printer)
 671             printer.dump ('}')
 672
 673
 674 class Lyrics:
 675     def __init__ (self):
 676         self.lyrics_syllables = []
 677
 678     def print_ly (self, printer):
 679         printer.dump ("\lyricmode {")
 680         for l in self.lyrics_syllables:
 681             printer.dump ( "%s " % l )
 682         printer.dump ("}")
 683
 684     def ly_expression (self):
 685         lstr = "\lyricmode {\n  "
 686         for l in self.lyrics_syllables:
 687             lstr += l + " "
 688         lstr += "\n}"
 689         return lstr
 690
 691
 692 class Header:
 693     def __init__ (self):
 694         self.header_fields = {}
 695     def set_field (self, field, value):
 696         self.header_fields[field] = value
 697
 698     def print_ly (self, printer):
 699         printer.dump ("\header {")
 700         printer.newline ()
 701         for (k,v) in self.header_fields.items ():
 702             if v:
 703                 printer.dump ('%s = %s' % (k,v))
 704                 printer.newline ()
 705         printer.dump ("}")
 706         printer.newline ()
 707         printer.newline ()
 708
 709
 710 class Paper:
 711     def __init__ (self):
 712         self.global_staff_size = -1
 713         # page size
 714         self.page_width = -1
 715         self.page_height = -1
 716         # page margins
 717         self.top_margin = -1
 718         self.bottom_margin = -1
 719         self.left_margin = -1
 720         self.right_margin = -1
 721         self.system_left_margin = -1
 722         self.system_right_margin = -1
 723         self.system_distance = -1
 724         self.top_system_distance = -1
 725
 726     def print_length_field (self, printer, field, value):
 727         if value >= 0:
 728             printer.dump ("%s = %s\\cm" % (field, value))
 729             printer.newline ()
 730     def print_ly (self, printer):
 731         if self.global_staff_size > 0:
 732             printer.dump ('#(set-global-staff-size %s)' % self.global_staff_size)
 733             printer.newline ()
 734         printer.dump ('\\paper {')
 735         printer.newline ()
 736         self.print_length_field (printer, "paper-width", self.page_width)
 737         self.print_length_field (printer, "paper-height", self.page_height)
 738         self.print_length_field (printer, "top-margin", self.top_margin)
 739         self.print_length_field (printer, "botton-margin", self.bottom_margin)
 740         self.print_length_field (printer, "left-margin", self.left_margin)
 741         # TODO: maybe set line-width instead of right-margin?
 742         self.print_length_field (printer, "right-margin", self.right_margin)
 743         # TODO: What's the corresponding setting for system_left_margin and
 744         #        system_right_margin in Lilypond?
 745         self.print_length_field (printer, "between-system-space", self.system_distance)
 746         self.print_length_field (printer, "page-top-space", self.top_system_distance)
 747
 748         printer.dump ('}')
 749         printer.newline ()
 750
 751 class Layout:
 752     def __init__ (self):
 753         self.context_dict = {}
 754     def add_context (self, context):
 755         if not self.context_dict.has_key (context):
 756             self.context_dict[context] = []
 757     def set_context_item (self, context, item):
 758         self.add_context (context)
 759         if not item in self.context_dict[context]:
 760             self.context_dict[context].append (item)
 761     def print_ly (self, printer):
 762         if self.context_dict.items ():
 763             printer.dump ('\\layout {')
 764             printer.newline ()
 765             for (context, defs) in self.context_dict.items ():
 766                 printer.dump ('\\context { \\%s' % context)
 767                 printer.newline ()
 768                 for d in defs:
 769                     printer.dump (d)
 770                     printer.newline ()
 771                 printer.dump ('}')
 772                 printer.newline ()
 773             printer.dump ('}')
 774             printer.newline ()
 775
 776
 777 class ChordEvent (NestedMusic):
 778     def __init__ (self):
 779         NestedMusic.__init__ (self)
 780         self.after_grace_elements = None
 781         self.grace_elements = None
 782         self.grace_type = None
 783     def append_grace (self, element):
 784         if element:
 785             if not self.grace_elements:
 786                 self.grace_elements = SequentialMusic ()
 787             self.grace_elements.append (element)
 788     def append_after_grace (self, element):
 789         if element:
 790             if not self.after_grace_elements:
 791                 self.after_grace_elements = SequentialMusic ()
 792             self.after_grace_elements.append (element)
 793
 794     def has_elements (self):
 795         return [e for e in self.elements if
 796                isinstance (e, NoteEvent) or isinstance (e, RestEvent)] != []
 797
 798
 799     def get_length (self):
 800         l = Rational (0)
 801         for e in self.elements:
 802             l = max(l, e.get_length())
 803         return l
 804
 805     def get_duration (self):
 806         note_events = [e for e in self.elements if
 807                isinstance (e, NoteEvent) or isinstance (e, RestEvent)]
 808         if note_events:
 809             return note_events[0].duration
 810         else:
 811             return None
 812
 813     def print_ly (self, printer):
 814         note_events = [e for e in self.elements if
 815                isinstance (e, NoteEvent)]
 816
 817         rest_events = [e for e in self.elements if
 818                isinstance (e, RhythmicEvent)
 819                and not isinstance (e, NoteEvent)]
 820
 821         other_events = [e for e in self.elements if
 822                 not isinstance (e, RhythmicEvent)]
 823
 824         if self.after_grace_elements:
 825             printer ('\\afterGrace {')
 826
 827         if self.grace_elements and self.elements:
 828             if self.grace_type:
 829                 printer ('\\%s' % self.grace_type)
 830             else:
 831                 printer ('\\grace')
 832             # don't print newlines after the { and } braces
 833             self.grace_elements.print_ly (printer, False)
 834         elif self.grace_elements: # no self.elements!
 835             warning (_ ("Grace note with no following music: %s") % self.grace_elements)
 836             if self.grace_type:
 837                 printer ('\\%s' % self.grace_type)
 838             else:
 839                 printer ('\\grace')
 840             self.grace_elements.print_ly (printer, False)
 841             printer ('{}')
 842
 843         # Print all overrides and other settings needed by the
 844         # articulations/ornaments before the note
 845         for e in other_events:
 846             e.print_before_note (printer)
 847
 848         if rest_events:
 849             rest_events[0].print_ly (printer)
 850         elif len (note_events) == 1:
 851             note_events[0].print_ly (printer)
 852         elif note_events:
 853             global previous_pitch
 854             pitches = []
 855             basepitch = None
 856             for x in note_events:
 857                 pitches.append (x.chord_element_ly ())
 858                 if not basepitch:
 859                     basepitch = previous_pitch
 860             printer ('<%s>' % string.join (pitches))
 861             previous_pitch = basepitch
 862             duration = self.get_duration ()
 863             if duration:
 864                 duration.print_ly (printer)
 865         else:
 866             pass
 867
 868         for e in other_events:
 869             e.print_ly (printer)
 870
 871         for e in other_events:
 872             e.print_after_note (printer)
 873
 874         if self.after_grace_elements:
 875             printer ('}')
 876             self.after_grace_elements.print_ly (printer, False)
 877
 878         self.print_comment (printer)
 879
 880 class Partial (Music):
 881     def __init__ (self):
 882         Music.__init__ (self)
 883         self.partial = None
 884     def print_ly (self, printer):
 885         if self.partial:
 886             printer.dump ("\\partial %s" % self.partial.ly_expression ())
 887
 888 class BarLine (Music):
 889     def __init__ (self):
 890         Music.__init__ (self)
 891         self.bar_number = 0
 892         self.type = None
 893
 894     def print_ly (self, printer):
 895         bar_symbol = { 'regular': "|", 'dotted': ":", 'dashed': ":",
 896                        'heavy': "|", 'light-light': "||", 'light-heavy': "|.",
 897                        'heavy-light': ".|", 'heavy-heavy': ".|.", 'tick': "'",
 898                        'short': "'", 'none': "" }.get (self.type, None)
 899         if bar_symbol <> None:
 900             printer.dump ('\\bar "%s"' % bar_symbol)
 901         else:
 902             printer.dump ("|")
 903
 904         if self.bar_number > 0 and (self.bar_number % 10) == 0:
 905             printer.dump ("\\barNumberCheck #%d " % self.bar_number)
 906         elif self.bar_number > 0:
 907             printer.print_verbatim (' %% %d' % self.bar_number)
 908         printer.newline ()
 909
 910     def ly_expression (self):
 911         return " | "
 912
 913 class Event(Music):
 914     def __init__ (self):
 915         # strings to print before the note to which an event is attached.
 916         # Ignored for notes etc.
 917         self.before_note = None
 918         self.after_note = None
 919    # print something before the note to which an event is attached, e.g. overrides
 920     def print_before_note (self, printer):
 921         if self.before_note:
 922             printer.dump (self.before_note)
 923    # print something after the note to which an event is attached, e.g. resetting
 924     def print_after_note (self, printer):
 925         if self.after_note:
 926             printer.dump (self.after_note)
 927     pass
 928
 929 class SpanEvent (Event):
 930     def __init__ (self):
 931         Event.__init__ (self)
 932         self.span_direction = 0 # start/stop
 933         self.line_type = 'solid'
 934         self.span_type = 0 # e.g. cres/decrescendo, ottava up/down
 935         self.size = 0 # size of e.g. ocrave shift
 936     def wait_for_note (self):
 937         return True
 938     def get_properties(self):
 939         return "'span-direction  %d" % self.span_direction
 940     def set_span_type (self, type):
 941         self.span_type = type
 942
 943 class SlurEvent (SpanEvent):
 944     def print_before_note (self, printer):
 945         command = {'dotted': '\\slurDotted',
 946                   'dashed' : '\\slurDashed'}.get (self.line_type, '')
 947         if command and self.span_direction == -1:
 948             printer.dump (command)
 949     def print_after_note (self, printer):
 950         # reset non-solid slur types!
 951         command = {'dotted': '\\slurSolid',
 952                   'dashed' : '\\slurSolid'}.get (self.line_type, '')
 953         if command and self.span_direction == -1:
 954             printer.dump (command)
 955     def ly_expression (self):
 956         return {-1: '(', 1:')'}.get (self.span_direction, '')
 957
 958 class BeamEvent (SpanEvent):
 959     def ly_expression (self):
 960         return {-1: '[', 1:']'}.get (self.span_direction, '')
 961
 962 class PedalEvent (SpanEvent):
 963     def ly_expression (self):
 964         return {-1: '\\sustainOn',
 965             0:'\\sustainOff\\sustainOn',
 966             1:'\\sustainOff'}.get (self.span_direction, '')
 967
 968 class TextSpannerEvent (SpanEvent):
 969     def ly_expression (self):
 970         return {-1: '\\startTextSpan',
 971             1:'\\stopTextSpan'}.get (self.span_direction, '')
 972
 973 class BracketSpannerEvent (SpanEvent):
 974     # Ligature brackets use prefix-notation!!!
 975     def print_before_note (self, printer):
 976         if self.span_direction == -1:
 977             printer.dump ('\[')
 978     # the the bracket after the last note
 979     def print_after_note (self, printer):
 980         if self.span_direction == 1:
 981             printer.dump ('\]')
 982     # we're printing everything in print_(before|after)_note...
 983     def ly_expression (self):
 984         return '';
 985
 986
 987 class OctaveShiftEvent (SpanEvent):
 988     def wait_for_note (self):
 989         return False
 990     def set_span_type (self, type):
 991         self.span_type = {'up': 1, 'down': -1}.get (type, 0)
 992     def ly_octave_shift_indicator (self):
 993         # convert 8/15 to lilypond indicators (+-1/+-2)
 994         value = {8: 1, 15: 2}.get (self.size, 0)
 995         # negative values go up!
 996         value *= -1*self.span_type
 997         return value
 998     def ly_expression (self):
 999         dir = self.ly_octave_shift_indicator ()
1000         value = ''
1001         if dir:
1002             value = '\ottava #%s' % dir
1003         return {
1004             -1: value,
1005             1: '\ottava #0'}.get (self.span_direction, '')
1006
1007 class TrillSpanEvent (SpanEvent):
1008     def ly_expression (self):
1009         return {-1: '\\startTrillSpan',
1010             0: '', # no need to write out anything for type='continue'
1011             1:'\\stopTrillSpan'}.get (self.span_direction, '')
1012
1013 class GlissandoEvent (SpanEvent):
1014     def print_before_note (self, printer):
1015         if self.span_direction == -1:
1016             style= {
1017                 "dashed" : "dashed-line",
1018                 "dotted" : "dotted-line",
1019                 "wavy"   : "zigzag"
1020             }. get (self.line_type, None)
1021             if style:
1022                 printer.dump ("\once \override Glissando #'style = #'%s" % style)
1023     def ly_expression (self):
1024         return {-1: '\\glissando',
1025             1:''}.get (self.span_direction, '')
1026
1027 class ArpeggioEvent(Event):
1028     def __init__ (self):
1029         Event.__init__ (self)
1030         self.direction = 0
1031         self.non_arpeggiate = False
1032     def wait_for_note (self):
1033         return True
1034     def print_before_note (self, printer):
1035         if self.non_arpeggiate:
1036             printer.dump ("\\arpeggioBracket")
1037         else:
1038           dir = { -1: "\\arpeggioArrowDown", 1: "\\arpeggioArrowUp" }.get (self.direction, '')
1039           if dir:
1040               printer.dump (dir)
1041     def print_after_note (self, printer):
1042         if self.non_arpeggiate or self.direction:
1043             printer.dump ("\\arpeggioNormal")
1044     def ly_expression (self):
1045         return ('\\arpeggio')
1046
1047
1048 class TieEvent(Event):
1049     def ly_expression (self):
1050         return '~'
1051
1052
1053 class HairpinEvent (SpanEvent):
1054     def set_span_type (self, type):
1055         self.span_type = {'crescendo' : 1, 'decrescendo' : -1, 'diminuendo' : -1 }.get (type, 0)
1056     def hairpin_to_ly (self):
1057         if self.span_direction == 1:
1058             return '\!'
1059         else:
1060             return {1: '\<', -1: '\>'}.get (self.span_type, '')
1061
1062     def ly_expression (self):
1063         return self.hairpin_to_ly ()
1064
1065     def print_ly (self, printer):
1066         val = self.hairpin_to_ly ()
1067         if val:
1068             printer.dump (val)
1069
1070
1071
1072 class DynamicsEvent (Event):
1073     def __init__ (self):
1074         Event.__init__ (self)
1075         self.type = None
1076     def wait_for_note (self):
1077         return True
1078     def ly_expression (self):
1079         if self.type:
1080             return '\%s' % self.type
1081         else:
1082             return
1083
1084     def print_ly (self, printer):
1085         if self.type:
1086             printer.dump ("\\%s" % self.type)
1087
1088 class MarkEvent (Event):
1089     def __init__ (self, text="\\default"):
1090         Event.__init__ (self)
1091         self.mark = text
1092     def wait_for_note (self):
1093         return False
1094     def ly_contents (self):
1095         if self.mark:
1096             return '%s' % self.mark
1097         else:
1098             return "\"ERROR\""
1099     def ly_expression (self):
1100         return '\\mark %s' % self.ly_contents ()
1101
1102 class MusicGlyphMarkEvent (MarkEvent):
1103     def ly_contents (self):
1104         if self.mark:
1105             return '\\markup { \\musicglyph #"scripts.%s" }' % self.mark
1106         else:
1107             return ''
1108
1109
1110 class TextEvent (Event):
1111     def __init__ (self):
1112         Event.__init__ (self)
1113         self.Text = None
1114         self.force_direction = None
1115         self.markup = ''
1116     def wait_for_note (self):
1117         return True
1118
1119     def direction_mod (self):
1120         return { 1: '^', -1: '_', 0: '-' }.get (self.force_direction, '-')
1121
1122     def ly_expression (self):
1123         base_string = '%s\"%s\"'
1124         if self.markup:
1125             base_string = '%s\markup{ ' + self.markup + ' {%s} }'
1126         return base_string % (self.direction_mod (), self.text)
1127
1128 class ArticulationEvent (Event):
1129     def __init__ (self):
1130         Event.__init__ (self)
1131         self.type = None
1132         self.force_direction = None
1133     def wait_for_note (self):
1134         return True
1135
1136     def direction_mod (self):
1137         return { 1: '^', -1: '_', 0: '-' }.get (self.force_direction, '')
1138
1139     def ly_expression (self):
1140         return '%s\\%s' % (self.direction_mod (), self.type)
1141
1142 class ShortArticulationEvent (ArticulationEvent):
1143     def direction_mod (self):
1144         # default is -
1145         return { 1: '^', -1: '_', 0: '-' }.get (self.force_direction, '-')
1146     def ly_expression (self):
1147         if self.type:
1148             return '%s%s' % (self.direction_mod (), self.type)
1149         else:
1150             return ''
1151
1152 class NoDirectionArticulationEvent (ArticulationEvent):
1153     def ly_expression (self):
1154         if self.type:
1155             return '\\%s' % self.type
1156         else:
1157             return ''
1158
1159 class MarkupEvent (ShortArticulationEvent):
1160     def __init__ (self):
1161         ArticulationEvent.__init__ (self)
1162         self.contents = None
1163     def ly_expression (self):
1164         if self.contents:
1165             return "%s\\markup { %s }" % (self.direction_mod (), self.contents)
1166         else:
1167             return ''
1168
1169 class FretEvent (MarkupEvent):
1170     def __init__ (self):
1171         MarkupEvent.__init__ (self)
1172         self.force_direction = 1
1173         self.strings = 6
1174         self.frets = 4
1175         self.barre = None
1176         self.elements = []
1177     def ly_expression (self):
1178         val = ""
1179         if self.strings <> 6:
1180             val += "w:%s;" % self.strings
1181         if self.frets <> 4:
1182             val += "h:%s;" % self.frets
1183         if self.barre and len (self.barre) >= 3:
1184             val += "c:%s-%s-%s;" % (self.barre[0], self.barre[1], self.barre[2])
1185         have_fingering = False
1186         for i in self.elements:
1187             if len (i) > 1:
1188                 val += "%s-%s" % (i[0], i[1])
1189             if len (i) > 2:
1190                 have_fingering = True
1191                 val += "-%s" % i[2]
1192             val += ";"
1193         if have_fingering:
1194             val = "f:1;" + val
1195         if val:
1196             return "%s\\markup { \\fret-diagram #\"%s\" }" % (self.direction_mod (), val)
1197         else:
1198             return ''
1199
1200
1201 class FunctionWrapperEvent (Event):
1202     def __init__ (self, function_name = None):
1203         Event.__init__ (self)
1204         self.function_name = function_name
1205     def pre_note_ly (self, is_chord_element):
1206         if self.function_name:
1207             return "\\%s" % self.function_name
1208         else:
1209             return ''
1210     def pre_chord_ly (self):
1211         return ''
1212     def ly_expression (self):
1213         if self.function_name:
1214             return "\\%s" % self.function_name
1215         else:
1216             return ''
1217
1218 class ParenthesizeEvent (FunctionWrapperEvent):
1219     def __init__ (self):
1220         FunctionWrapperEvent.__init__ (self, "parenthesize")
1221
1222 class NotestyleEvent (Event):
1223     def __init__ (self):
1224         Event.__init__ (self)
1225         self.style = None
1226         self.filled = None
1227     def pre_chord_ly (self):
1228         if self.style:
1229             return "\\once \\override NoteHead #'style = #%s" % self.style
1230         else:
1231             return ''
1232     def pre_note_ly (self, is_chord_element):
1233         if self.style and is_chord_element:
1234             return "\\tweak #'style #%s" % self.style
1235         else:
1236             return ''
1237     def ly_expression (self):
1238         return self.pre_chord_ly ()
1239
1240
1241 class ChordPitch:
1242     def __init__ (self):
1243         self.alteration = 0
1244         self.step = 0
1245     def __repr__(self):
1246         return self.ly_expression()
1247     def ly_expression (self):
1248         return pitch_generating_function (self)
1249
1250 class ChordModification:
1251     def __init__ (self):
1252         self.alteration = 0
1253         self.step = 0
1254         self.type = 0
1255     def ly_expression (self):
1256         if self.type:
1257             val = {1: ".", -1: "^" }.get (self.type, "")
1258             val += "%s" % self.step
1259             val += {1: "+", -1: "-"}.get (self.alteration, "")
1260             return val
1261         else:
1262             return ''
1263
1264 class ChordNameEvent (Event):
1265     def __init__ (self):
1266         Event.__init__ (self)
1267         self.root = None
1268         self.kind = None
1269         self.duration = None
1270         self.modifications = []
1271         self.bass = None
1272     def add_modification (self, mod):
1273         self.modifications.append (mod)
1274     def ly_expression (self):
1275         if not self.root:
1276             return ''
1277         value = self.root.ly_expression ()
1278         if self.duration:
1279             value += self.duration.ly_expression ()
1280         if self.kind:
1281             value += ":"
1282             value += self.kind
1283         # First print all additions/changes, and only afterwards all subtractions
1284         for m in self.modifications:
1285             if m.type == 1:
1286               value += m.ly_expression ()
1287         for m in self.modifications:
1288             if m.type == -1:
1289               value += m.ly_expression ()
1290         if self.bass:
1291             value += "/+%s" % self.bass.ly_expression ()
1292         return value
1293
1294
1295 class TremoloEvent (ArticulationEvent):
1296     def __init__ (self):
1297         Event.__init__ (self)
1298         self.bars = 0
1299
1300     def ly_expression (self):
1301         str=''
1302         if self.bars and self.bars > 0:
1303             str += ':%s' % (2 ** (2 + string.atoi (self.bars)))
1304         return str
1305
1306 class BendEvent (ArticulationEvent):
1307     def __init__ (self):
1308         Event.__init__ (self)
1309         self.alter = None
1310     def ly_expression (self):
1311         if self.alter != None:
1312             return "-\\bendAfter #%s" % self.alter
1313         else:
1314             return ''
1315
1316 class RhythmicEvent(Event):
1317     def __init__ (self):
1318         Event.__init__ (self)
1319         self.duration = Duration()
1320         self.associated_events = []
1321
1322     def add_associated_event (self, ev):
1323         if ev:
1324             self.associated_events.append (ev)
1325
1326     def pre_chord_ly (self):
1327         return [ev.pre_chord_ly () for ev in self.associated_events]
1328
1329     def pre_note_ly (self, is_chord_element):
1330         return [ev.pre_note_ly (is_chord_element) for ev in self.associated_events]
1331
1332     def ly_expression_pre_note (self, is_chord_element):
1333         res = string.join (self.pre_note_ly (is_chord_element), ' ')
1334         if res != '':
1335             res = res + ' '
1336         return res
1337
1338     def get_length (self):
1339         return self.duration.get_length()
1340
1341     def get_properties (self):
1342         return ("'duration %s"
1343                 % self.duration.lisp_expression ())
1344
1345 class RestEvent (RhythmicEvent):
1346     def __init__ (self):
1347         RhythmicEvent.__init__ (self)
1348         self.pitch = None
1349
1350     def ly_expression (self):
1351         res = self.ly_expression_pre_note (False)
1352         if self.pitch:
1353             return res + "%s%s\\rest" % (self.pitch.ly_expression (), self.duration.ly_expression ())
1354         else:
1355             return 'r%s' % self.duration.ly_expression ()
1356
1357     def print_ly (self, printer):
1358         for ev in self.associated_events:
1359             ev.print_ly (printer)
1360         if self.pitch:
1361             self.pitch.print_ly (printer)
1362             self.duration.print_ly (printer)
1363             printer ('\\rest')
1364         else:
1365             printer('r')
1366             self.duration.print_ly (printer)
1367
1368 class SkipEvent (RhythmicEvent):
1369     def ly_expression (self):
1370         return 's%s' % self.duration.ly_expression ()
1371
1372 class NoteEvent(RhythmicEvent):
1373     def  __init__ (self):
1374         RhythmicEvent.__init__ (self)
1375         self.pitch = None
1376         self.drum_type = None
1377         self.cautionary = False
1378         self.forced_accidental = False
1379
1380     def get_properties (self):
1381         str = RhythmicEvent.get_properties (self)
1382
1383         if self.pitch:
1384             str += self.pitch.lisp_expression ()
1385         elif self.drum_type:
1386             str += "'drum-type '%s" % self.drum_type
1387
1388         return str
1389
1390     def pitch_mods (self):
1391         excl_question = ''
1392         if self.cautionary:
1393             excl_question += '?'
1394         if self.forced_accidental:
1395             excl_question += '!'
1396
1397         return excl_question
1398
1399     def ly_expression (self):
1400         # obtain all stuff that needs to be printed before the note:
1401         res = self.ly_expression_pre_note (True)
1402         if self.pitch:
1403             return res + '%s%s%s' % (self.pitch.ly_expression (),
1404                                self.pitch_mods(),
1405                                self.duration.ly_expression ())
1406         elif self.drum_type:
1407             return res + '%s%s' (self.drum_type,
1408                            self.duration.ly_expression ())
1409
1410     def chord_element_ly (self):
1411         # obtain all stuff that needs to be printed before the note:
1412         res = self.ly_expression_pre_note (True)
1413         if self.pitch:
1414             return res + '%s%s' % (self.pitch.ly_expression (),
1415                                self.pitch_mods())
1416         elif self.drum_type:
1417             return res + '%s%s' (self.drum_type)
1418
1419
1420     def print_ly (self, printer):
1421         for ev in self.associated_events:
1422             ev.print_ly (printer)
1423         if self.pitch:
1424             self.pitch.print_ly (printer)
1425             printer (self.pitch_mods ())
1426         else:
1427             printer (self.drum_type)
1428
1429         self.duration.print_ly (printer)
1430
1431 class KeySignatureChange (Music):
1432     def __init__ (self):
1433         Music.__init__ (self)
1434         self.tonic = None
1435         self.mode = 'major'
1436         self.non_standard_alterations = None
1437
1438     def format_non_standard_alteration (self, a):
1439         alter_dict = { -2:   ",DOUBLE-FLAT",
1440                        -1.5: ",THREE-Q-FLAT",
1441                        -1:   ",FLAT",
1442                        -0.5: ",SEMI-FLAT",
1443                         0:   ",NATURAL",
1444                         0.5: ",SEMI-SHARP",
1445                         1:   ",SHARP",
1446                         1.5: ",THREE-Q-SHARP",
1447                         2:   ",DOUBLE-SHARP"}
1448         try:
1449             accidental = alter_dict[a[1]]
1450         except KeyError:
1451             warning (_ ("Unable to convert alteration %s to a lilypond expression") % a[1])
1452             return ''
1453         if len (a) == 2:
1454             return "( %s . %s )" % (a[0], accidental)
1455         elif len (a) == 3:
1456             return "(( %s . %s ) . %s )" % (a[2], a[0], accidental)
1457         else:
1458             return ''
1459
1460     def ly_expression (self):
1461         if self.tonic:
1462             return '\\key %s \\%s' % (self.tonic.ly_step_expression (),
1463                      self.mode)
1464         elif self.non_standard_alterations:
1465             alterations = [self.format_non_standard_alteration (a) for
1466                                         a in self.non_standard_alterations]
1467             # TODO: Check if the alterations should really be given in reverse
1468             #       order of if that's just a bug in Lilypond. If it's a bug,
1469             #       fix it and remove the following call, otherwise add a
1470             #       proper comment here!
1471             alterations.reverse ()
1472             return "\\set Staff.keySignature = #`(%s)" % string.join (alterations, " ")
1473         else:
1474             return ''
1475
1476 class TimeSignatureChange (Music):
1477     def __init__ (self):
1478         Music.__init__ (self)
1479         self.fractions = [4,4]
1480         self.style = None
1481     def ly_expression (self):
1482         st = ''
1483         # Print out the style if we have ome, but the '() should only be
1484         # forced for 2/2 or 4/4, since in all other cases we'll get numeric
1485         # signatures anyway despite the default 'C signature style!
1486         is_common_signature = self.fractions in ([2,2], [4,4], [4,2])
1487         if self.style:
1488             if self.style == "common":
1489                 st = "\\defaultTimeSignature"
1490             elif (self.style != "'()"):
1491                 st = "\\once \\override Staff.TimeSignature #'style = #%s " % self.style
1492             if (self.style != "'()") or is_common_signature:
1493                 st = "\\numericTimeSignature"
1494
1495         # Easy case: self.fractions = [n,d] => normal \time n/d call:
1496         if len (self.fractions) == 2 and isinstance (self.fractions[0], int):
1497             return st + '\\time %d/%d ' % tuple (self.fractions)
1498         elif self.fractions and not isinstance (self.fractions[0], list):
1499             # TODO: Implement non-standard time-signatures
1500             return st + ''
1501         else:
1502             # TODO: Implement non-standard time-signatures
1503             return st + ''
1504
1505 class ClefChange (Music):
1506     def __init__ (self):
1507         Music.__init__ (self)
1508         self.type = 'G'
1509         self.position = 2
1510         self.octave = 0
1511
1512     def octave_modifier (self):
1513         return {1: "^8", 2: "^15", -1: "_8", -2: "_15"}.get (self.octave, '')
1514     def clef_name (self):
1515         return {('G', 2): "treble",
1516                 ('G', 1): "french",
1517                 ('C', 1): "soprano",
1518                 ('C', 2): "mezzosoprano",
1519                 ('C', 3): "alto",
1520                 ('C', 4): "tenor",
1521                 ('C', 5): "baritone",
1522                 ('F', 3): "varbaritone",
1523                 ('F', 4): "bass",
1524                 ('F', 5): "subbass",
1525                 ("percussion", 2): "percussion",
1526                 ("TAB", 5): "tab"}.get ((self.type, self.position), None)
1527     def ly_expression (self):
1528         return '\\clef "%s%s"' % (self.clef_name (), self.octave_modifier ())
1529
1530     clef_dict = {
1531         "G": ("clefs.G", -2, -6),
1532         "C": ("clefs.C", 0, 0),
1533         "F": ("clefs.F", 2, 6),
1534         }
1535
1536     def lisp_expression (self):
1537         try:
1538             (glyph, pos, c0) = self.clef_dict[self.type]
1539         except KeyError:
1540             return ""
1541         clefsetting = """
1542         (make-music 'SequentialMusic
1543         'elements (list
1544    (context-spec-music
1545    (make-property-set 'clefGlyph "%s") 'Staff)
1546    (context-spec-music
1547    (make-property-set 'clefPosition %d) 'Staff)
1548    (context-spec-music
1549    (make-property-set 'middleCPosition %d) 'Staff)))
1550 """ % (glyph, pos, c0)
1551         return clefsetting
1552
1553 class Transposition (Music):
1554     def __init__ (self):
1555         Music.__init__ (self)
1556         self.pitch = None
1557     def ly_expression (self):
1558         self.pitch._force_absolute_pitch = True
1559         return '\\transposition %s' % self.pitch.ly_expression ()
1560
1561 class StaffChange (Music):
1562     def __init__ (self, staff):
1563         Music.__init__ (self)
1564         self.staff = staff
1565     def ly_expression (self):
1566         if self.staff:
1567             return "\\change Staff=\"%s\"" % self.staff
1568         else:
1569             return ''
1570
1571
1572 class TempoMark (Music):
1573     def __init__ (self):
1574         Music.__init__ (self)
1575         self.baseduration = None
1576         self.newduration = None
1577         self.beats = None
1578         self.parentheses = False
1579     def set_base_duration (self, dur):
1580         self.baseduration = dur
1581     def set_new_duration (self, dur):
1582         self.newduration = dur
1583     def set_beats_per_minute (self, beats):
1584         self.beats = beats
1585     def set_parentheses (self, parentheses):
1586         self.parentheses = parentheses
1587     def wait_for_note (self):
1588         return False
1589     def duration_to_markup (self, dur):
1590         if dur:
1591             # Generate the markup to print the note, use scheme mode for
1592             # ly_expression to get longa and not \longa (which causes an error)
1593             return "\\general-align #Y #DOWN \\smaller \\note #\"%s\" #UP" % dur.ly_expression(None, True)
1594         else:
1595             return ''
1596     def tempo_markup_template (self):
1597         return "\\mark\\markup { \\fontsize #-2 \\line { %s } }"
1598     def ly_expression (self):
1599         res = ''
1600         if not self.baseduration:
1601             return res
1602         if self.beats:
1603             if self.parentheses:
1604                 res += "\\tempo \"\" %s=%s" % (self.baseduration.ly_expression(), self.beats)
1605             else:
1606                 res += "\\tempo %s=%s" % (self.baseduration.ly_expression(), self.beats)
1607         elif self.newduration:
1608             dm = self.duration_to_markup (self.baseduration)
1609             ndm = self.duration_to_markup (self.newduration)
1610             if self.parentheses:
1611                 contents = "\"(\" %s = %s \")\"" % (dm, ndm)
1612             else:
1613                 contents = " %s = %s " % (dm, ndm)
1614             res += self.tempo_markup_template() % contents
1615         else:
1616             return ''
1617         return res
1618
1619 class FiguredBassNote (Music):
1620     def __init__ (self):
1621         Music.__init__ (self)
1622         self.number = ''
1623         self.prefix = ''
1624         self.suffix = ''
1625     def set_prefix (self, prefix):
1626         self.prefix = prefix
1627     def set_suffix (self, suffix):
1628         self.prefix = suffix
1629     def set_number (self, number):
1630         self.number = number
1631     def ly_expression (self):
1632         res = ''
1633         if self.number:
1634             res += self.number
1635         else:
1636             res += '_'
1637         if self.prefix:
1638             res += self.prefix
1639         if self.suffix:
1640             res += self.suffix
1641         return res
1642
1643
1644 class FiguredBassEvent (NestedMusic):
1645     def __init__ (self):
1646         NestedMusic.__init__ (self)
1647         self.duration = None
1648         self.real_duration = 0
1649         self.parentheses = False
1650         return
1651     def set_duration (self, dur):
1652         self.duration = dur
1653     def set_parentheses (self, par):
1654         self.parentheses = par
1655     def set_real_duration (self, dur):
1656         self.real_duration = dur
1657
1658     def print_ly (self, printer):
1659         figured_bass_events = [e for e in self.elements if
1660                isinstance (e, FiguredBassNote)]
1661         if figured_bass_events:
1662           notes = []
1663           for x in figured_bass_events:
1664               notes.append (x.ly_expression ())
1665           contents = string.join (notes)
1666           if self.parentheses:
1667               contents = '[%s]' % contents
1668           printer ('<%s>' % contents)
1669           self.duration.print_ly (printer)
1670
1671
1672 class MultiMeasureRest(Music):
1673
1674     def lisp_expression (self):
1675         return """
1676 (make-music
1677   'MultiMeasureRestMusicGroup
1678   'elements
1679   (list (make-music (quote BarCheck))
1680         (make-music
1681           'ChordEvent
1682           'elements
1683           (list (make-music
1684                   'MultiMeasureRestEvent
1685                   'duration
1686                   %s)))
1687         (make-music (quote BarCheck))))
1688 """ % self.duration.lisp_expression ()
1689
1690     def ly_expression (self):
1691         return 'R%s' % self.duration.ly_expression ()
1692
1693
1694 class StaffGroup:
1695     def __init__ (self, command = "StaffGroup"):
1696         self.stafftype = command
1697         self.id = None
1698         self.instrument_name = None
1699         self.short_instrument_name = None
1700         self.symbol = None
1701         self.spanbar = None
1702         self.children = []
1703         self.is_group = True
1704         # part_information is a list with entries of the form
1705         #     [staffid, voicelist]
1706         # where voicelist is a list with entries of the form
1707         #     [voiceid1, [lyricsid11, lyricsid12,...] ]
1708         self.part_information = None
1709
1710     def append_staff (self, staff):
1711         self.children.append (staff)
1712
1713     def set_part_information (self, part_name, staves_info):
1714         if part_name == self.id:
1715             self.part_information = staves_info
1716         else:
1717             for c in self.children:
1718                 c.set_part_information (part_name, staves_info)
1719
1720     def print_ly_contents (self, printer):
1721         for c in self.children:
1722             if c:
1723                 c.print_ly (printer)
1724     def print_ly_overrides (self, printer):
1725         needs_with = False
1726         needs_with |= self.spanbar == "no"
1727         needs_with |= self.instrument_name != None
1728         needs_with |= self.short_instrument_name != None
1729         needs_with |= (self.symbol != None) and (self.symbol != "bracket")
1730         if needs_with:
1731             printer.dump ("\\with {")
1732             if self.instrument_name or self.short_instrument_name:
1733                 printer.dump ("\\consists \"Instrument_name_engraver\"")
1734             if self.spanbar == "no":
1735                 printer.dump ("\\override SpanBar #'transparent = ##t")
1736             brack = {"brace": "SystemStartBrace",
1737                      "none": "f",
1738                      "line": "SystemStartSquare"}.get (self.symbol, None)
1739             if brack:
1740                 printer.dump ("systemStartDelimiter = #'%s" % brack)
1741             printer.dump ("}")
1742
1743     def print_ly (self, printer):
1744         if self.stafftype:
1745             printer.dump ("\\new %s" % self.stafftype)
1746         self.print_ly_overrides (printer)
1747         printer.dump ("<<")
1748         printer.newline ()
1749         if self.stafftype and self.instrument_name:
1750             printer.dump ("\\set %s.instrumentName = %s" % (self.stafftype,
1751                     escape_instrument_string (self.instrument_name)))
1752             printer.newline ()
1753         if self.stafftype and self.short_instrument_name:
1754             printer.dump ("\\set %s.shortInstrumentName = %s" % (self.stafftype,
1755                     escape_instrument_string (self.short_instrument_name)))
1756             printer.newline ()
1757         self.print_ly_contents (printer)
1758         printer.newline ()
1759         printer.dump (">>")
1760         printer.newline ()
1761
1762
1763 class Staff (StaffGroup):
1764     def __init__ (self, command = "Staff"):
1765         StaffGroup.__init__ (self, command)
1766         self.is_group = False
1767         self.part = None
1768         self.voice_command = "Voice"
1769         self.substafftype = None
1770
1771     def print_ly_overrides (self, printer):
1772         pass
1773
1774     def print_ly_contents (self, printer):
1775         if not self.id or not self.part_information:
1776             return
1777         sub_staff_type = self.substafftype
1778         if not sub_staff_type:
1779             sub_staff_type = self.stafftype
1780
1781         for [staff_id, voices] in self.part_information:
1782             # Chord names need to come before the staff itself!
1783             for [v, lyrics, figuredbass, chordnames] in voices:
1784                 if chordnames:
1785                     printer ('\context ChordNames = "%s" \\%s' % (chordnames, chordnames))
1786
1787             # now comes the real staff definition:
1788             if staff_id:
1789                 printer ('\\context %s = "%s" << ' % (sub_staff_type, staff_id))
1790             else:
1791                 printer ('\\context %s << ' % sub_staff_type)
1792             printer.newline ()
1793             n = 0
1794             nr_voices = len (voices)
1795             for [v, lyrics, figuredbass, chordnames] in voices:
1796                 n += 1
1797                 voice_count_text = ''
1798                 if nr_voices > 1:
1799                     voice_count_text = {1: ' \\voiceOne', 2: ' \\voiceTwo',
1800                                         3: ' \\voiceThree'}.get (n, ' \\voiceFour')
1801                 printer ('\\context %s = "%s" {%s \\%s }' % (self.voice_command, v, voice_count_text, v))
1802                 printer.newline ()
1803
1804                 for l in lyrics:
1805                     printer ('\\new Lyrics \\lyricsto "%s" \\%s' % (v,l))
1806                     printer.newline()
1807                 if figuredbass:
1808                     printer ('\context FiguredBass = "%s" \\%s' % (figuredbass, figuredbass))
1809             printer ('>>')
1810
1811     def print_ly (self, printer):
1812         if self.part_information and len (self.part_information) > 1:
1813             self.stafftype = "PianoStaff"
1814             self.substafftype = "Staff"
1815         StaffGroup.print_ly (self, printer)
1816
1817 class TabStaff (Staff):
1818     def __init__ (self, command = "TabStaff"):
1819         Staff.__init__ (self, command)
1820         self.string_tunings = []
1821         self.tablature_format = None
1822         self.voice_command = "TabVoice"
1823     def print_ly_overrides (self, printer):
1824         if self.string_tunings or self.tablature_format:
1825             printer.dump ("\\with {")
1826             if self.string_tunings:
1827                 printer.dump ("stringTunings = #'(")
1828                 for i in self.string_tunings:
1829                     printer.dump ("%s" % i.semitones ())
1830                 printer.dump (")")
1831             if self.tablature_format:
1832                 printer.dump ("tablatureFormat = #%s" % self.tablature_format)
1833             printer.dump ("}")
1834
1835
1836 class DrumStaff (Staff):
1837     def __init__ (self, command = "DrumStaff"):
1838         Staff.__init__ (self, command)
1839         self.drum_style_table = None
1840         self.voice_command = "DrumVoice"
1841     def print_ly_overrides (self, printer):
1842         if self.drum_style_table:
1843             printer.dump ("\with {")
1844             printer.dump ("drumStyleTable = #%s" % self.drum_style_table)
1845             printer.dump ("}")
1846
1847 class RhythmicStaff (Staff):
1848     def __init__ (self, command = "RhythmicStaff"):
1849         Staff.__init__ (self, command)
1850
1851 class Score:
1852     def __init__ (self):
1853         self.contents = None
1854         self.create_midi = False
1855
1856     def set_contents (self, contents):
1857         self.contents = contents
1858
1859     def set_part_information (self, part_id, staves_info):
1860         if self.contents:
1861           self.contents.set_part_information (part_id, staves_info)
1862
1863     def print_ly (self, printer):
1864         printer.dump ("\\score {");
1865         printer.newline ()
1866         if self.contents:
1867             self.contents.print_ly (printer);
1868         printer.dump ("\\layout {}");
1869         printer.newline ()
1870         if not self.create_midi:
1871             printer.dump ("% To create MIDI output, uncomment the following line:");
1872             printer.newline ();
1873             printer.dump ("% ");
1874         printer.dump ("\\midi {}");
1875         printer.newline ()
1876         printer.dump ("}");
1877         printer.newline ()
1878
1879
1880 def test_pitch ():
1881     bflat = Pitch()
1882     bflat.alteration = -1
1883     bflat.step =  6
1884     bflat.octave = -1
1885     fifth = Pitch()
1886     fifth.step = 4
1887     down = Pitch ()
1888     down.step = -4
1889     down.normalize ()
1890
1891
1892     print bflat.semitones()
1893     print bflat.transposed (fifth),  bflat.transposed (fifth).transposed (fifth)
1894     print bflat.transposed (fifth).transposed (fifth).transposed (fifth)
1895
1896     print bflat.semitones(), 'down'
1897     print bflat.transposed (down)
1898     print bflat.transposed (down).transposed (down)
1899     print bflat.transposed (down).transposed (down).transposed (down)
1900
1901
1902
1903 def test_printer ():
1904     def make_note ():
1905         evc = ChordEvent()
1906         n = NoteEvent()
1907         evc.append (n)
1908         return n
1909
1910     def make_tup ():
1911         m = SequentialMusic()
1912         m.append (make_note ())
1913         m.append (make_note ())
1914         m.append (make_note ())
1915
1916
1917         t = TimeScaledMusic ()
1918         t.numerator = 2
1919         t.denominator = 3
1920         t.element = m
1921         return t
1922
1923     m = SequentialMusic ()
1924     m.append (make_tup ())
1925     m.append (make_tup ())
1926     m.append (make_tup ())
1927
1928     printer = Output_printer()
1929     m.print_ly (printer)
1930     printer.newline ()
1931
1932 def test_expr ():
1933     m = SequentialMusic()
1934     l = 2
1935     evc = ChordEvent()
1936     n = NoteEvent()
1937     n.duration.duration_log = l
1938     n.pitch.step = 1
1939     evc.insert_around (None, n, 0)
1940     m.insert_around (None, evc, 0)
1941
1942     evc = ChordEvent()
1943     n = NoteEvent()
1944     n.duration.duration_log = l
1945     n.pitch.step = 3
1946     evc.insert_around (None, n, 0)
1947     m.insert_around (None, evc, 0)
1948
1949     evc = ChordEvent()
1950     n = NoteEvent()
1951     n.duration.duration_log = l
1952     n.pitch.step = 2
1953     evc.insert_around (None, n, 0)
1954     m.insert_around (None, evc, 0)
1955
1956     evc = ClefChange()
1957     evc.type = 'treble'
1958     m.insert_around (None, evc, 0)
1959
1960     evc = ChordEvent()
1961     tonic = Pitch ()
1962     tonic.step = 2
1963     tonic.alteration = -2
1964     n = KeySignatureChange()
1965     n.tonic=tonic.copy()
1966     n.scale = [0, 0, -2, 0, 0,-2,-2]
1967
1968     evc.insert_around (None, n, 0)
1969     m.insert_around (None, evc, 0)
1970
1971     return m
1972
1973
1974 if __name__ == '__main__':
1975     test_printer ()
1976     raise 'bla'
1977     test_pitch()
1978
1979     expr = test_expr()
1980     expr.set_start (Rational (0))
1981     print expr.ly_expression()
1982     start = Rational (0,4)
1983     stop = Rational (4,2)
1984     def sub(x, start=start, stop=stop):
1985         ok = x.start >= start and x.start +x.get_length() <= stop
1986         return ok
1987
1988     print expr.lisp_sub_expression(sub)
1989